Research on deformation control and prevention measures of pile anchor support system in foundation pit

Abstract

With the rapid development of urban modernization, the pile anchor support system has been widely used in the deep foundation pit project. Because the deformation of the pile anchor support system directly affects the overall stability of the foundation pit and brings serious potential safety accidents to the construction of the deep foundation pit, avoiding the deformation of the pile anchor support system can effectively prevent the occurrence of the construction safety accidents of the deep foundation pit. Based on many years of construction experience, the deformation rule of pile anchor support system of deep foundation pit is taken as the research object. This paper starts from the scheme design of pile anchor support system and the monitoring data of the foundation pit, and combines with the actual deformation of the pile anchor support system in the construction site, summarizes the causes and prevention measures of the deformation of the pile anchor support system in the construction stage. The research results show that in the initial stage of construction, the top of the pile anchor support system inclines forward to the pit and gradually changes into a bow shape. This kind of deformation is related to the increase of excavation depth and the erosion of active soil pressure area by surface water. In the later stage of construction, the deformation of the top of the foundation pit converges and the bottom of the pile anchor support system protrudes into the pit, which is related to the erosion of the passive soil pressure area by rainwater and the embedded depth of the pile foundation.

Expression and Analysis of Uncertainty in Deep Foundation Pit Design Scheme Decision-Making

“…Case studies like those of the Men Keqing coal mine by Ma et al [9] and the Shandong Anju coal mine by Zhang et al [10] serve as benchmarks, contributing to the development of effective excavation and support strategies under diverse geological conditions. Additionally, studies on foundation pileanchor systems and the behavior of deep soft rock, such as those conducted by Li et al [11] and Xuyang et al [12], have provided valuable preventive strategies and insights into support design for urban construction and mining applications.…”

The Effection Analysis of Geotechnical Investigation on Foundation Pit Supporting Construction

“…The process of geotechnical investigation starts from the signing of the contract and extends to the project delivery stage. The degree of standardization determines the quality of the project [13] . Therefore, it is necessary to standardize the geotechnical survey work process and strengthen project management to effectively achieve standardization and scientific surveys.…”

Numerical simulation of double-row pile-NPR anchor cable support based on ABAQUS

“…Foundation ditch engineering has the characteristics of strong comprehensiveness and complex system. In the process of excavation and construction of the main body of the foundation ditch of high-rise buildings, under the action of unloading caused by the excavation of the soil and the gravity of the soil itself, not only the original stress distribution will change, but also will cause the uplift of the bottom of the ditch and the displacement of the side wall of the foundation ditch [2,3]. At present, an important way to analyze the excavation process and supporting structure of foundation ditch is still theoretical analysis, but thanks to the development of computer technology, simulation and analysis of foundation ditch engineering has been widely used.…”