Study on Stability and Deformation Characteristics of Ultra-Deep Diaphragm Wall during Trench Excavation

The stability and deformation during trenching of ultra-deep diaphragm walls have a greater impact on the construction of diaphragm walls. The conventional limit equilibrium method, known as the vertical slices method, assumes homogeneity within the rock and soil mass, making it challenging to accou...

Full description

Saved in:
Bibliographic Details
Published in:Buildings (Basel) 2024-07, Vol.14 (7), p.2227
Main Authors: Ma, Jianhua, Hu, Gang, Rui, Rui, Ding, Ruiheng, Sun, Tianjian
Format: Article
Language:English
Subjects:
Analysis
Construction
Deformation
Deformation analysis
Deformation effects
Diaphragm wall
Engineering
Equilibrium
Equilibrium methods
Excavation
factor of safety
Finite element analysis
Finite element method
Grooves
Homogeneity
horizontal strip method
Mud
numerical analysis
Rain-water (Water-supply)
Sewage treatment plants
Shear strength
side deformation of groove trench
Simulation
Slurries
Soil analysis
Stability
stability of grooving
Stratification
Stress concentration
Strip
Trenching
underground diaphragm wall
Vertical distribution
Weight
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The stability and deformation during trenching of ultra-deep diaphragm walls have a greater impact on the construction of diaphragm walls. The conventional limit equilibrium method, known as the vertical slices method, assumes homogeneity within the rock and soil mass, making it challenging to account for their stratification. Based on the limit equilibrium method, the horizontal strip method takes into account the stratification of the foundation soil. Based on the actual project, considering the different mud unit weights and heights, the horizontal strip method was used to analyze the stability of the groove trench and analyze the deformation law of the groove trench by the finite element method. The results indicate the following: The horizontal strip method can effectively assess the influence law of mud weight and height on the safety coefficient of groove trench stabilization. The higher the unit weight and level of slurry, the greater the wall safety coefficient. Moreover, the mud unit weight obtained by the horizontal strip method is about 12.70~12.64 kN/m3, which is close to the actual maximum mud weight of 12.5 kN/m3. The estimated mud unit weight aligns more closely with actual conditions. Additionally, through finite element analysis, the deformation law of the groove trench of ultra-deep diaphragm walls has been analyzed and summarized. The soil around the groove trench does not move inward, which shows three different deformation modes with different depths.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14072227