不同排桩-支撑组合体系下深基坑变形监测与计算分析

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【中图分类号】：TU753 【文献标志码】：A 【文章编号】：1008-3197（2025）04-51-07

【DOI编码】：10.3969/j.issn.1008-3197.2025.04.012

Deformation Monitoring and Calculation Analysis of Deep Foundation Pit under Different Pile -support Combination Systems

WEIWeiwei，YANGPo，ZHANGLIjiang，HUYue，WANGZhenhui，HULei （China Construction International Construction Co.LTD.，Suzhou 215oO4，China）

【Abstract】： Taking adeep foundation pit project in Suzhou as a case study，this paper compares the supporting systems of single-row piles with two levels of concrete supports and double row piles withone level of concrete support during theexcavationof thesame foundation pitthrough on-sitedeformationmonitoring.Theresultsindicate thatthe axial forceinthefirst-level supports forboththesingle-rowpileand double-row pilesystems gradually increases with the increase of excavation depth offoundation pit，and theaxial forceper linear meter in the supports ofthe double-row pilesystem is greater than thatinthe single-rowpilesystem.The deep horizontal displacement and vertical displacement of both supporting structures increasewith increasing excavation depth of the foundation pit，and influenced bythe time-dependent efects of excavation，uneven deformations occur in the supporting structures onboth sides ofthe foundation pit.Theoreticalcalculation and analysis demonstrate that the measured deformation of the single-row pile support structure agrees well with the calculated values，while a relativelysmalldiscrepancy exists for the double-row piles，highlighting the importanceof carefully selecting the compression modulus of the soil between the piles.Both supporting structures effectively control the deformation of the deep foundation pit.

Key words】：deep foundation pit;single row pile;double row pile;deformation monitoring;concret

随着城市地下空间的开发，基坑工程密集化且向着“深、大、长"特点发展，深基坑支护形式直接影响着周边环境及基坑开挖的安全性、经济性和施工的便利性[～3]。（剩余5890字）