gts applications 1

www.midas-diana.com/gts 1

midasGTS Applications

Selected case studies

2 www.midas-diana.com/gts


Table of content

Underground PC Culvert water line connection to shoreline dock................................................ 4 Underground path construction at a new building......................................................................... 6 Sosa ~ Nogsan new roadway ....................................................................................................... 8 Train car depot construction for Busan subway line 3 ................................................................ 10 Sosa ~ Nogsan tunnels ............................................................................................................... 12 New expressway route 60 ........................................................................................................... 14 Busan subway line 3 tunnel – zone 321...................................................................................... 16 South coast highway expansion (Sachun – SaIn)....................................................................... 18 New building construction ........................................................................................................... 20 Sosa – Nogsan roadway construction......................................................................................... 22 Excavated tunnel construction .................................................................................................... 24 Analysis for effects on subway tunnels due to construction of a new building ........................... 26 Overflow weir construction .......................................................................................................... 28 Mining shaft/tunnel construction.................................................................................................. 30 Tunnel stability analysis through a weak zone............................................................................ 32 High speed train track construction............................................................................................. 34 Kosack – Soowon new roadway.................................................................................................. 36 High speed train track construction............................................................................................. 38 Sewage discharge network construction..................................................................................... 40 Sewage pipe network construction ............................................................................................. 42 Sewage pipe network construction ............................................................................................. 44 Temporary railway bridge 1......................................................................................................... 46 Temporary railway bridge 2......................................................................................................... 48 A new roadway construction ....................................................................................................... 50 Seismic design through dynamic analysis .................................................................................. 52 Bridge – Foundation design......................................................................................................... 54 A new subway line construction .................................................................................................. 56 Analysis check for a weak fault zone .......................................................................................... 58 Bridge and underpath design ...................................................................................................... 60 A new roadway construction ....................................................................................................... 62 Kosack – Soowon new roadway.................................................................................................. 64 Y22 new development project ..................................................................................................... 66 Seoul new City Hall ..................................................................................................................... 68 Dubai Tower, Doha, Qatar .......................................................................................................... 70


Engineer

Freyssinet

Project Overview Project Image

Title Underground PC Culvert water line

connection to shoreline dock

Project Design for construction

Scope

TechSpan design for buried culvert

connection

- Construction stage analysis - Differential soil pressure due to

varying backfill levels - Effects from non-uniform live loads - Check for PC culvert connection

Overview The underground structure, which is prefabricated concrete segments in the form

of an arch, is analyzed in construction stages to reflect sequential backfill and

pavements while fully accounting for soil-structure interaction.

Typical section

MIDAS/GTS Program Application [1]


MIDAS/GTS Modeling

Pre-processing

Global model overview Native soil mesh generation

Post-processing

Vert. displ. under culvert structure After backfill (Iso Surface)

Axial forces of plate elements Displacements due to live loads


Engineer

Bu Kyoung Geo-Consultant


Title Underground path construction at

a new building


Scope Investigation of effects on

surrounding structures and

facilities

Overview 1. Stability analysis for an underground path at an urban construction site 2. Excavation – Messer Shield Tunnel advancing construction method

Typical section



MIDAS/GTS Modeling

Pre-processing

3-D finite element mesh Messer Shield Tunnel excavation

Post-processing

Horiz. Displ. at connection (at stair) History of displ. at connection path

Moment diagram for ventilation part Shear force diagram for entrance part


Engineer ChungSuk Engineering


Title Sosa ~ Nogsan new roadway

Project Turnkey Design

Scope

Stability analysis of tunnels over a

100m length represented by a

typical section of connection

between main and utility tunnels.

Investigation for adequacy of

shotcrete & rock bolts by checking

stress concentration,

displacements & member forces at

connection zones.

Overview Numerical analysis of shotcrete & rock bolt pattern and excavation method at main

& utility tunnel connections

Typical section

Layout of shotcrete and rock bolts

Analysis section



MIDAS/GTS Modeling

Pre-processing

Analysis model Geometry - Solid

Post-processing

Displacements (Z) Ground Principal Stresses

Shotcrete Stresses Rock bolt Axial forces


Engineer

Hakyung Engineering


Title Train car depot construction for

Busan subway line 3


Scope

Analysis for effects on and stability

of underground sewage box

structure under a train depot

construction site due to new

structures and fill placement

Overview 3-D numerical analysis for foundation soil replacement & fill placement to check

existing sewage box structure

Typical section



MIDAS/GTS Modeling

Pre-processing

Analysis model Sewage box placement

(Construction stage)

Post-processing

Vert. displ. after 1st phase fill Vert. displ. after 2nd phase fill

Clipping Plane (vert stresses) Min. principal stresses


Engineer

Daejeong Consultants


Title Sosa ~ Nogsan tunnels

Project Turnkey design

Scope

Investigation for stability of

tunnels, shotcrete & rock bolts by

analyzing stress concentration at

the transverse tunnel connection

Overview Displacements & stresses of tunnels, shotcrete and rock bolts were expected to

increase significantly in the fault zone. 3-D construction stage analysis was

performed.

Typical section



MIDAS/GTS Modeling

Pre-processing

Total analysis model Model for tunnels, shotcrete & rock

bolts

Post-processing

Displacements (x)

Shotcrete stresses Rock bolt axial forces


Engineer Kaya ENG


Title New expressway route 60


Scope Analysis for stability of foundation

adjacent to a fault zone

Overview Stability of bridge foundation in a fault zone was examined. The support strata

were examined in detail relative to severely weathered faults.

Typical section



MIDAS/GTS Modeling

Pre-processing

3-D finite element mesh Pile model

Post-processing

Horizontal displacements Vertical displacements

Pile axial forces Pile moment diagram


Engineer Orum Engineering


Title Busan subway line 3 tunnel – zone 321


Scope

This new tunnel construction takes

place beneath major existing

structures for which their stability must

be ensured.

Overview The zone 321 (STA.1+440~+580) intersects with an underground path, a waterway

and another subway line. An existing bridge also exists in the longitudinal direction.

Plan & Typical section



MIDAS/GTS Modeling

Pre-processing

Underground structure model Micropile foundation reinforcement

Post-processing

Settlement analysis results for Subway Line 1 piers

Settlement analysis results for bridge piers

Shotcrete flexural axial stresses Rockbolt axial forces


Engineer

Manyoung Eng


Title South coast highway expansion

(Sachun – SaIn)


Scope 3-D blast vibration analysis

Overview

1. Modeling blast loads in surrounding mass due to blasting at a center cut hole

2. Time history analysis was performed to analyze the dynamic behavior of the

ground mass. Vibration effects on the existing tunnels and ground surface

were investigated.

Typical section



MIDAS/GTS Modeling

Pre-processing

Analysis model Existing tunnel shotcrete

Post-processing

Displacements at new tunnel (0.01sec)

Displacements at new tunnel (1.0sec)

Expanded tunnel blast (0.01sec) Expanded tunnel blast (1.0sec)


Engineer Jinyoung E & C


Title New building construction


Scope Investigation of existing subway

structure subjected to excavation for

new building construction

Overview Safety investigation for 2-Arch tunnels and 1-Arch type tunnel where a large scale

excavation for a new building foundation takes place with temporary shoring within

the proximity of a 2D (D=tunnel diameter) distance

Underground structures



MIDAS/GTS Modeling

Pre-processing

Subway station & tunnel model Excavation zone with temp. shoring

2-Arch / 1-Arch connection part Temp. shoring detail model

Subway station zone Temp. shoring detail model


Engineer Daejung Consultants


Title Sosa – Nogsan roadway construction


Scope 3-D tunnel stability analysis

Overview

1. Tunnel exits are situated in weak layers of alluvial and weathered soils within 15m

from the ground surface.

2. Since the tunnel exits are constructed after excavating the sloped surface, the

surrounding ground will experience new stress fields, which exhibit different

behaviors than the initial state of stresses.

Main sections



MIDAS/GTS Modeling

Pre-processing

Total analysis model Tunnel model

Post-processing

Displacements (Dxyz)

Displacements (Dxyz) shotcrete &

rock bolts Shotcrete stresses


Engineer

Seoyeoung Engineering


Title Excavated tunnel construction


Scope

3-D FEM analysis was performed to

investigate stability of tunnel and

ground. Applicability of cover

slab and arch was examined.

Overview 1. Excavated tunnel construction is applied where ground cover ranges from 0.7 to

5.8m passing underneath a valley.

2. Bedrock is sand stone with layers of shale underlain by shallow hard rock.

Typical sections


Cover slab

Cover arch


MIDAS/GTS Modeling

Pre-processing

Cover slab Cover arch

Post-processing

Results after construction of cover slab

Results after construction

Stresses at tunnel excavation Stresses after construction of cover arch


Engineer

Bu Kyoung Geo-Consultant


Title Analysis for effects on subway

tunnels due to construction of a

new building


Scope Stability check for existing subway

Overview 1. Design of temporary shoring for excavation for a new building 2. Check existing subway in the proximity of new excavation

Main section



MIDAS/GTS Modeling

Pre-processing 3-D finite element mesh Temporary structure model

Post-processing

Tunnel center line stresses Ground & temp. structure stresses

after completion of construction

Shotcrete stresses Temp structure (Strut & H-Pile) analysis results


Engineer Tejo Engineering


Title Overflow weir construction

Project Preliminary design

Scope

3-D numerical analysis of an

overflow weir structure in which

settlement under the weir is

reflected in the design of the

structure

Overview Check displacements, settlement and stresses of an overflow weir through 3-D

numerical analysis

Elevation & sections

Overflow Roadway



MIDAS/GTS Modeling

Pre-processing Analysis model Overflow weir

Post-processing Displacements (XYZ) Principal stresses in vert. direction

Vertical displacements Horizontal displacements


Engineer

Daehan Consultant


Title Mining shaft/tunnel construction


Scope Mine facilities (vert. shaft / machine

room / explosives storage etc.)

design

Overview 1. Complex excavation from horizontal tunnels to vertical shaft to machine room 2. 3-D staged analysis

Main section



MIDAS/GTS Modeling

Pre-processing

Analysis model Underground facilities model

Post-processing

Clipping plane Vertical shaft connection

Analysis results for underground facilities Principal stresses


Engineer Pyunghwa Engineering


Title Tunnel stability analysis through a

weak zone


Scope

Fault zone and ground conditions

are closely examined to perform

analysis for tunnel construction in

the weak zone while reflecting

reinforcement.

Overview Displacements & stresses of tunnels, shotcrete and rock bolts were expected to

increase significantly in the fault zone. 3-D construction stage analysis was

performed.

Main section



MIDAS/GTS Modeling

Pre-processing

Analysis model Reinforcement zone at exits

(shotcrete & rock bolts model)

Post-processing Clipping Plane Analysis results at reinf. zone

Displacements Stresses


Engineer SunKoo Engineering


Title High speed train track

construction


Scope Analysis of train track base for

train vibration

Overview Numerical analysis of ground vibration characteristics with varying train moving

speeds relative to different thicknesses of track base

Key plan



MIDAS/GTS Modeling

Pre-processing

Analysis model Ground & Loadcase

Post-processing

Displacements Displacements for moving train

LSS-22 standard liveload Time history graph


Engineer Dongshin Tech Development


Title Kosack – Soowon new roadway


Scope 2/3-D numerical analysis of bridge

foundation

Overview

1. Abutment and backfill exhibit 3-D behavior, and as such construction stage

analysis is required. 2. Pier P1 is constructed within a temporarily shored excavation, which requires

construction stage analysis.

Plan, section & elevation



MIDAS/GTS Modeling

Pre-processing

Analysis model Close-up of foundation

Post-processing

Vertical displacements after construction Close-up of displacements

Analysis results of abutment fdn. Abutment model isolated


Engineer

Daehan Consultant


Title High speed train track

construction


Scope

Investigation of effects on

existing highway bridge pier and

sewage box structure due to

tunnel excavation

Overview

1. Tunnel excavation beneath an existing highway bridge and a large section

sewage box structure

2. Investigation for needs for reinforcing both structures

3. Check movements and stability of both structures

Plan


Potential damage assessment was performed for tunnel excavation, which

crosses the existing structures at STA. 271km 240~380 (L=140m zone).


MIDAS/GTS Modeling

Pre-processing

3-D finite element mesh Pier foundation & box (side)

Pier foundation & box (front) Flying view

Post-processing

Vertical stress diagram Horizontal stress diagram




Title Sewage discharge network

construction

Project Private sector financed project

Scope Stability check for open cut

excavation method

Overview

1. After assembling panels, excavation & placement take place simultaneously

very fast operation

2. No hammering, vibration & noise process pollution & disturbance minimized

3. For high ground water level SCW method employed to cut off water

Typical section


Temp shoring (double slide rail)

(Excavation depth: 4.0~6.0m)


MIDAS/GTS Modeling

Pre-processing

Initial stabilization Excavation & temp structure

erection

Post-processing

Vertical displacements Stresses in temp structures

Clipping plane Hor. Stresses in temp structures




Title Sewage pipe network construction


Scope Stability check based on semi-

shielded excavation method

Overview 1. Advancing with a specifically fabricated shield head

2. Possibility of excavating a long distance

3. Advantageous in weak soil and high ground water table

Setup

Semi-shield method



MIDAS/GTS Modeling

Pre-processing

Initial stage Advancing pipe

Post-processing

Ground displacements after pipe advanced

Close-up of displacements

Stresses at tunnel excavation Close-up of stresses




Title Sewage pipe network construction


Scope Structural analysis of buried pipe in

weak ground

Overview 1. Pipe support base 180° sand bed

2. Depth of pipe within 1.0~6.5m

Typical section



MIDAS/GTS Modeling

Pre-processing

Analysis model Polyethylene pipe

Post-processing

Embedded pipe Total displacements

Max principal stresses Ground principal stresses


Engineer DongA Geotechs


Title Temporary railway bridge 1


Scope Check settlement of soil

retained by shored walls during

excavation

Overview

1. For pedestrian path construction, JES and open cut shoring methods are used.

2. Existing railway slope consists of retaining walls at front, which is further sloped

at the top.

Key plan


Path zone A: H = 4.4 ~ 13.2m


MIDAS/GTS Modeling

Pre-processing

Initial stage Temp structure erection

Post-processing

Vertical displacements Earth anchor axial forces

Total displacements Temp structure moments


Engineer

DongA Geotechs


Title Temporary railway bridge 2


Scope Check settlement of soil

retained by shored walls

during excavation

Overview

1. For pedestrian path construction, JES and open cut shoring methods are used.

3. Existing railway slope consists of retaining walls at front, which is further sloped

at the top.

Key plan


Path zone A: H = 4.4 ~ 13.2m


MIDAS/GTS Modeling

Pre-processing

Initial stage Final excavation

Post-processing

Vertical displacements Soldier pile moment diagram

Settlement graphs by distances Tie load & nailing axial forces


Engineer

Moojin NeoTech


Title A new roadway construction


Scope Investigation for stability of

adjacent tunnel due to blasting for

a new tunnel

Overview

1. When modeling ground, which is infinite in mass, normal boundary conditions

result in reflecting waves. So viscosity boundary is used instead.

2. Dynamic properties are found through eigenvalue analysis.

3. Time history analysis is carried out to investigate dynamic behaviors of

structures due to dynamic blast load

Key plan


Calculation of blast loads


MIDAS/GTS Modeling

Pre-processing

Initial stage Blast load

Post-processing

Vertical displacements Vibration history speed curve

Shotcrete axial forces Stresses after erecting cover arch


Engineer


Title Seismic design through dynamic

analysis


Scope Seismic analysis of pipe by time

history method

Overview 1. Pipe design based on dynamic analysis of pipe and connections 2. True earthquake records such as Hachinohe wave or Ofunato wave and

artificial earthquake are used as input.

Waves & section

Analysis section


Hachinohe wave (long period)

Artificial wave


MIDAS/GTS Modeling

Pre-processing

Eigenvalue analysis results – 1st & 2nd periods

Time history analysis (ground movement)

Post-processing

Perpendicular to the pipe axis (X,Y) Hachinohe ground movement

Clipping plane Stresses inside the pipe


Engineer Tejo Engineering


Title Bridge – Foundation design


Scope Structure & foundation

interaction analysis

Overview 3-D numerical analysis for a bridge structure was performed, which reflected

settlement of the abutment foundation.

Plan & perspective views



MIDAS/GTS Modeling

Pre-processing

Analysis model Close-up of bridge

Post-processing

Displacements after construction (XYZ) After foundation construction

Displacements after foundation

construction (XYZ) Displacements (XYZ)


Engineer Undisclosed


Title A new subway line construction


Scope Structural analysis for subway tunnel

& utility tunnel crossing

Overview 3-D analysis was performed to investigate anticipated stress concentration at the

crossing of a main subway tunnel and a utility tunnel. Effects on the utility tunnel

were focused during the subway tunnel excavation.

Key plan & section

Extent of analysis



MIDAS/GTS Modeling

Pre-processing

Analysis model Shotcrete-rock bolt in analysis

Post-processing

Yield Ratio Rock bolt axial forces

Stresses at crossing Stresses at vertical connection


Engineer Yongma Engineering


Title Analysis check for a weak fault zone


Scope Stress-seepage coupled analysis in a

fault zone

Overview

1. The strike and slope of a fault affect the behavior of tunnels. Ground

configuration properties and stratification in the fault zone are reflected in a

numerical analysis model to design shotcrete and rock bolts.

2. Geological investigation identified undesirable physical properties and high

permeability of the rock in the fault zone. Development of pore pressure and

decrease in groundwater level are expected to adversely affect the shotcrete

and rock bolts.

Main section



MIDAS/GTS Modeling

Pre-processing

Analysis model Shotcrete-rock bolts model

Post-processing

Horizontal displacements Rock bolt axial forces

Pattern of waterhead distribution Water pressure distribution


Engineer Kaya ENG


Title Bridge and underpath design

Project Value engineering

Scope Abutment foundation design by

construction stage analysis

Overview Analysis of vertical and horizontal displacements of abutments and pile caps

Section, key plan & perspective view



MIDAS/GTS Modeling

Pre-processing

Analysis model Flying view

Post-processing

Displacements On-curve diagram

Vertical displacements of abutment piles Analysis results in Flying view




Title A new roadway construction


Scope Differential settlements check for a

traffic underground path supported

on different soil stratification

Overview Design of underground path and its foundation support for its own weight &

backfill. Design of the concrete structure to reflect differential settlements.

Typical sections


Removable Earth Anchor Strut+Earth Anchor


MIDAS/GTS Modeling

Pre-processing

Analysis model Close-up at abutment foundation

Post-processing

Vertical displacements at final excavation Temporary support structure

Horizontal displacements at final excavation

Horizontal stresses at final excavation




Title Kosack – Soowon new roadway


Scope Seismic analysis of bridge

substructure

Overview 1. Seismic analysis (equivalent static, dynamic & response spectrum analyses)

2. Construction stage analysis of bridge

Design Criteria

Design earthquake wave


Artificial earthquake waves


MIDAS/GTS Modeling

Pre-processing

Analysis model Close-up of pier

Post-processing

Vert. displacements after excavation Vert. displacements of pier piles

Pile moment diagram Pattern of vert. displacements


Engineer midasIT for Ove Arup, Singapore


Title Y22 new development project


Scope stability of subway structure when

excavating the building site

Overview

The development project is the construction of a 70 stories high twin building in the

Yeouido district of Seoul, Korea. The excavation site is located nearby the subway

line 5. The effects of excavation on the existing subway tunnel are investigated by

construction stage analysis.

Key plan



MIDAS/GTS Modeling

Pre-processing

Preliminary 2D model 3D model

Post-processing

Vert. displacements after excavation Vert. displacements of the shaft

Stresses in subway lining Axial forces in the rock bolts


Engineer

Samsung Engineering & Construction


Title Seoul new City Hall


Scope Excavation stability

Overview

Key plan



MIDAS/GTS Modeling

Pre-processing

Geometry Mesh

Excavation layers Columns


Engineer

Hyder Consulting Ltd, UK


Title Dubai Tower, Doha, Qatar

Project Piled-raft foundation design

Scope

Analysis results for design:

- Settlements - Raft forces and bending moments - Pile forces and bending moments

Overview

The proposed development for the Dubai Tower project comprises the

construction of an approximately eighty floor high rise tower with mezzanine,

ground floor and five basement levels and will be the tallest structure in Qatar

when it is complete. The tower is founded on a piled raft. In order to fully

understand the behaviour of the foundation, a 3D finite element model is required.

Pile scheme



MIDAS/GTS Modeling

Pre-processing

Podium and basement levels Side view, Piles and Basement

Post-processing

Quarter cut on settlement results Bending moments in the raft

Vertical stress in the rock layers Pile axial forces

gts applications 1

Documents