BIM Utilizationin TOKYO SKYTREE

Hiroshi Miyakawa
Obayashi Corporation
Building Construction Division
PD CenterGeneral Manager

Project Outline• NameTOKYO SKYTREE• Owner

Tobu Railway Co., Ltd.
Tobu Tower Skytree Co., Ltd• Architect

Nikken Sekkei Ltd.

• Contractor

Obayashi Corporation• Location

Oshiage, Sumida Ward, Tokyo• Site Area

36,844m2 (Tower + Podium Bldg.)• Height634m• Structure

Steel Frame,
Steel Framed Reinforced Concrete,and Reinforced Concrete Structure• Construction

June 2008 – February 2012

Project Outline

Project Outline

600m
500m
400m
300m
200m
100m

Design Concept• Triangle Transforms into Circle• Concave and Swelling

495m

315m(circle)

ConcaveSwelling0m(triangle)

BIM in Construction
１．Review of Complex Detail
２．BIM Utilization in Fabrication
３．Construction Sequence Simulation
４．Constructability Review
５．BIM Utilization in Accuracy Control System

１．Review of Complex DetailTop ofantenna spire(gain tower)
６３４ｍ

Secondobservatory
４５０ｍFirstobservatory
３５０ｍ

１．Review of Complex DetailTruss node

●Detail Design ーFunctional Verification・Visualizationー（attachments for maintenance, separate work, etc.）

●Temporary attachments
Functional Verification,
Detail Study東京スカイツリー建設®のＩＣＴ技術

２．BIM Utilization in Fabrication
Transfer BIM into the special purpose CAD in 3D-DXF format
Generate curved sheet of layout in full-scale

Installation of the curved layout

Confirm the position of 700+ studs

２．BIM Utilization in Fabrication●Transportation simulation －gravity center, weight, and size－（feedback to steel fabrication: position of joints and lifting lugs）
L 4.2m

H 2.5m

W 3.0mProduct Weight： 22.1t⇒ＯＫ３．Construction Sequence Simulation
West Area

Tower Area
≒100ｍTobu Isesaki Line

East Area

North legexcavation

Slab concrete:
top-down method
150ｔCC
150ｔCCWest leghorizontal brace& excavation

Utility installation
at planned road

Kitajikken River

East leghorizontal brace& excavation

Excavation completed---before steel erection

Steel pile of wall foundation
東京スカイツリー建設®のＩＣＴ技術

Excavation completed---before steel erection

Installation of grade beam (lower part)

Grade beam（lower part: h2,500mm）

Connection tosteel pile
東京スカイツリー建設®のＩＣＴ技術

Installation of grade beam (lower part)▽Ｈ２０▽Ｈ２００

▽Ｈ１５０

▽Ｈ５０

▽Ｈ１００

▽Ｈ５０

４．Constructability Review –eave soffit panelEave Soffit Panel

４．Constructability Review –eave soffit panel-

SkyJuster : hoisting load control device

４．Constructability Review –eave soffit panel-５．BIM Utilization in Accuracy Control System●Interacting with Steel Erection Accuracy Control System

3D Surveying System●Interacting with Steel Erection Accuracy Control System

部材マーク
1-35C1-1
1-35C3-A1
1-35C3-B1
1-35C5-1
2-35C1-1
2-35C3-A1
2-35C3-B1
2-35C5-1
3-35C1-1
3-35C3-A1
3-35C3-B1
3-35C5-1

柱頭芯座標
XYZ
0.00 16854.41
294500.00-8386.00 14550.87
294500.00
8386.00 14550.87
294500.00
14556.72
8404.32293500.00-14596.33 -8427.20
294500.00-8408.40 -14537.93
294500.00-16794.42-12.92294500.00-14556.70
8404.34
293500.00
14596.33 -8427.20
294500.00
16794.41-12.92294500.00
8408.41 -14537.92
294500.00
0.00 -16808.64
293500.00

自動視準・追尾式
Total Station
トータルステーション

Wi-fi
無線

小型パソコン

Target points in 3D coordinate
Control Device：Laptop PC（Wi-fi embedded）

Automatic Registration

3D Surveying System

3D Surveying System
Total Station：
Auto-rotation・Manual confirmation

Target：Reflection sheet
marked during fabrication,
attached on site.

Calculates points based on displacement
and twist of the center of steel

Control Device：Laptop PC（with Wi-fi）

Displays results and directions