Investigation of Surface Settlement and Wall Deflection Caused by Braced Excavation in Spatially Variable Clays Based on Anisotropic Random Fields

2021 ◽  
Author(s):  
Shun Yi ◽  
Jian Chen ◽  
Juehao Huang ◽  
Jianbin Li ◽  
Yuefeng Qiu ◽  
...  
Keyword(s):  
Random Fields ◽  
Surface Settlement ◽  
Braced Excavation ◽  
Wall Deflection

scholarly journals Numerical Analysis on the Performance of the Underwater Excavation

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Bo Li ◽  
Cangqin Jia ◽  
Guihe Wang ◽  
Jun Ren ◽  
Gaofeng Lu ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Retaining Wall ◽  
Lateral Wall ◽  
Surface Settlement ◽  
Design Parameters ◽  
Analysis Model ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Wall Deflection ◽  
Total Settlement

Based on the Yongdingmen Station of Beijing Metro, the underwater excavation method for deep foundation pit was introduced. This study constructed a numerical analysis model to analyze the performance of surface settlement and lateral wall deflection in the process of underwater excavation. Results showed that this method was better to control the surface settlement and lateral wall deflection compared with other dewatering excavations. In detail, most of the surface settlement was caused during the dry excavation stage and dewatering excavation stage while the deflection caused by underwater excavation only accounted for about 10% of the total settlement. Besides, the maximum settlement occurred 0.25∼0.5 H e behind the retaining wall and the value was 0.04% H e . Similar to the result of the surface settlement, most of the lateral wall deflection had been completed before the underwater excavation, which only caused about 7% of the total deflection. The maximum wall deflection and its location were approximately 0.06% H e and 0.5 H e , respectively. Moreover, a series of 3D numerical analyses were studied on the design parameters of the underwater excavation method. This study can be used as a reference for general performance and structural design of foundation pits with underwater excavation.

A simple estimation model for 3D braced excavation wall deflection

2017 ◽  
Vol 83 ◽  
pp. 106-113 ◽  
Author(s):  
A.T.C. Goh ◽  
Fan Zhang ◽  
Wengang Zhang ◽  
Yanmei Zhang ◽  
Hanlong Liu
Keyword(s):  
Estimation Model ◽  
Braced Excavation ◽  
Wall Deflection ◽  
Simple Estimation

A simple prediction model for wall deflection caused by braced excavation in clays

2015 ◽  
Vol 63 ◽  
pp. 67-72 ◽  
Author(s):  
Wengang Zhang ◽  
Anthony T.C. Goh ◽  
Feng Xuan
Keyword(s):  
Prediction Model ◽  
Braced Excavation ◽  
Wall Deflection

scholarly journals NUMERICAL ANALYSIS OF THE BEHAVIOR OF SPECIAL DOUBLE-ROW SUPPORT STRUCTURE

2013 ◽  
Vol 19 (2) ◽  
pp. 169-176 ◽  
Author(s):  
Kai Fang ◽  
Zhongmiao Zhang ◽  
Xingwang Liu ◽  
Qianqing Zhang ◽  
Cungang Lin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Influence Factors ◽  
Support Structure ◽  
Double Row ◽  
Braced Excavation ◽  
Wall Deflection ◽  
Parametric Studies ◽  
The Stability ◽  
Support Wall

A special double-row support structure used for braced excavation was modeled numerically using finite element method. The performance of the braced excavation depends on the interaction between the two walls of the support structure. Comprehensive parametric studies were carried out to investigate the influence factors on the performance. It was ascertained that the support structure behavior was largely influenced by overlapping length of two support walls, embedment ratio of inner support wall and spacing between two support walls. Appropriate parameters should be chosen to limit wall deflection and to maintain the stability of the support structure.

Characteristics of ground surface settlement during excavation

1993 ◽  
Vol 30 (5) ◽  
pp. 758-767 ◽  
Author(s):  
Chang-Yu Ou ◽  
Pio-Go Hsieh ◽  
Dar-Chang Chiou
Keyword(s):  
Plane Strain ◽  
Empirical Formula ◽  
Ground Surface ◽  
Lateral Wall ◽  
Surface Settlement ◽  
Observation Data ◽  
Wall Deflection ◽  
Ground Surface Settlement ◽  
Field Observation Data ◽  
Center Section

The objective of this paper is to study the characteristics of ground surface settlement during excavation. Ten excavation cases in Taipei with good-quality construction and field observation data are selected to study the characteristics of excavation behavior. The location of maximum lateral wall deflection, magnitude of maximum lateral wall deflection, relationship of maximum lateral wall deflection and maximum ground surface settlement, location of maximum ground surface settlement, and apparent influence range are thus established based on the actual excavation cases. Finally, an empirical formula is proposed to predict the ground surface settlement profile at the center section of an excavation, where the behavior may be characterized by plane-strain conditions. Key words : excavation, surfac settlement, wall deflection, plane strain, empirical formula.

Sign in / Sign up

Export Citation Format

Share Document