The Supporting Scheme Selection of Deep Foundation Pit Based on Fuzzy Optimization Theory

2014 ◽  
Vol 541-542 ◽  
pp. 1492-1496
Author(s):  
Zi Sheng Yang ◽  
Ji Xiao Tao ◽  
Hong Ke Pan ◽  
Yong Tao Li
Keyword(s):  
Fuzzy Optimization ◽  
Optimization Theory ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Supporting System ◽  
Simplified Method ◽  
Scheme Selection ◽  
System Selection ◽  
Selection Of

In order to get a quantitative and simple supporting scheme of deep foundation pit, this paper creatively develop a simplified method of supporting system selection based on the fuzzy optimization theory. The simplified method determines a preferred equation of the supporting system at first. Then the best solution is selected based on the preferred equation. Based on the simplified method, the analysis of the foundation excavation for Chuangye Dasha in Taiyuan has been performed. The result of the analysis shows that the method is reasonable and scientific.

scholarly journals Research and Application of Anti-floating Schemes of Deep Foundation Pit of Subway for Underwater Excavation and underwater concrete sealing

2020 ◽  
Vol 165 ◽  
pp. 04001
Author(s):  
Sheng Luo
Keyword(s):  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Main Structure ◽  
The Third ◽  
Third Phase ◽  
Underwater Concrete ◽  
Subway Construction ◽  
Bottom Slab ◽  
Selection Of

To implement deep foundation pit of subway construction with underground continuous wall adopting underwater excavation and waterproofing concrete bottom sealing curtain, the depth of bottom concrete must first meet the anti-floating requirements of the foundation pit. Since the elevation of the bottom slab of the station is certain, the thicker the sealing concrete, the deeper the excavation depth of the foundation pit, the greater the buoyancy of the water to be withstood, and eventually the thicker the sealing concrete, so the selection of foundation pit anti-floating scheme is very critical. This paper combines the practical construction of the deep foundation pit of the main structure of Yongdingmenwai station which is in the third phase of Beijing Metro Line 8 construction project, and analyzes and compares the anti-floating scheme of the foundation pit, so as to select a more reasonable anti-floating scheme, in order to apply experiences for future similar projects and construction.

Research on Improved AHP Evaluation in Supporting the Right to Determine the Weight of Deep Foundation

2014 ◽  
Vol 919-921 ◽  
pp. 731-734
Author(s):  
Hong Yan Jiang ◽  
Gang Gang Yu
Keyword(s):  
Scaling Theory ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Judgment Matrix ◽  
The Right ◽  
Index Weight ◽  
Selection Of

The traditional AHP in the judgment matrix is established by using 1-9 scale, this scale has transfer difference, consistency of judgment matrix and thinking is not equivalent shortcomings. The improved AHP scaling theory is used in deep foundation pit support index weight determination, the selection of foundation pit supporting is more comprehensive scientific reasonable accurate.

Study on Deformation Influence of Deep Foundation Pit Pile-Anchor Supporting System Nearby Metro Structure

2014 ◽  
Vol 638-640 ◽  
pp. 1190-1194
Author(s):  
Hua Peng ◽  
Xiao Qi Xiao ◽  
Zhi Yong Dong
Keyword(s):  
Ground Surface ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Structure Deformation ◽  
Supporting System ◽  
Bottom Level ◽  
Anchor System ◽  
Big Cities

In the big cities, any construction nearby the metro structure become critical to the safety of the metro,especially for deep foundation pit engineering.In such case,Pile-anchor supporting system is normally used, however different deformation shape of the supporting wall will bring different deformation of the metro structure.This paper analysed the relations between the pile-anchor supporting system and the nearby metro structures and stated how to control the nearby metro structure deformation through the design of the Pile-anchor supporting system.The analysis showed the following conclusions:If the nearby metro structure is closer to the ground surface, it will be more sensitive to the deformation of the piles-anchor system;Shape 1 & 2 are better to control the metro structure deformation,Shape 3 will result bigger settlement;the metro structure above and in the middle of the foundation bottom level are very much influenced by the deformation of the piles;If the deformation of metro structure exceeds the allowable value, other measures should be considered.

A Practical Method for the Construction of the Supporting System of Covered Excavation of Metro Station

2013 ◽  
Vol 574 ◽  
pp. 151-161
Author(s):  
Bao Jin ◽  
Hai Yun Zhao ◽  
Yang Liu
Keyword(s):  
Practical Method ◽  
Construction Technology ◽  
Optimal Management ◽  
Construction Process ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Metro Station ◽  
Deep Foundation Pit ◽  
Supporting System

This paper proposed a practical construction technology for the supporting system of covered excavation of deep foundation pit enclosure structure in urban subway. With the proposed method, the optimal management of the construction process was carried out in order to alleviate the construction difficulty, and a relative fast construction process was implemented. Finally, the proposed method was successfully applied to the construction of a practical metro station.

Study on the Deformation Characteristics of Supporting System of Deep Foundation Pit in Subway Station Construction

2011 ◽  
Vol 243-249 ◽  
pp. 546-551
Author(s):  
Hua Zhi Zhang ◽  
Yi Fang Feng
Keyword(s):  
Numerical Simulation ◽  
Horizontal Displacement ◽  
Subway Station ◽  
Deformation Characteristics ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Supporting System ◽  
Simulation Results ◽  
Metro Project

Taking Jiyu Bridge Station of Wuhan Metro Project as example, the deformation characteristics of supporting system of deep foundation pit was studied by means of numerical simulation (FLAC3D) in consideration of construction order. The deformation fields of different excavation depths of diaphram wall were obtained and analyzed in order to gain the maximum horizontal displacement value and settlement value. By comparison with the monitoring data, the simulation results can basically reflect the deformation characteristics. Moreover, the simulation results showed that the application of diaphram wall was feasible for foundation pit supporting in Jiyu Bridge Station, meanwhile, the results can be based on to guide the construction.

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