填芯管桩在基坑支护工程中水平承载性状分析

Analysis of Horizontal Loading Behavior of Filling Core Pipe Piles in Foundation Pits

为研究混凝土管桩在基坑支护中的承载性能,通过对2组不同内径的6根混凝土管桩进行填芯或不填芯处理,并进行室内水平承载性能模型试验,分析基坑开挖后混凝土管桩在不同内径和相同内径条件下不同填芯强度对混凝土管桩的水平承载性能的影响。试验结果表明:通过填芯可以有效提高混凝土管桩的基坑支护性能,且外径相同的条件下,内径越大桩身受基坑开挖影响越大;通过填芯加固处理可以有效提升管桩支护的安全性。

With an aim to study the bearing capacity of concrete pipe piles in foundation pit supports,an indoor model test of its horizontal bearing capacity has thus been made of6sets of concrete pipe piles of different inner diameters in2groups,after a filling treatment as well as a non-filling treatment,followed by an analysis of the horizontal bearing capacity of concrete pipe piles of different diameter and with different core strengths after the excavation of foundation pits.Experimental results show that the core filling can effectively improve the foundation pit supporting performance of the concrete pipe piles.With the external diameter a constant,the longer the pile diameter is,the greater the effect exerted by the excavation on the pile foundation pits will be.Thus the core filling and reinforcement help to effectively enhance the safety of pipe pile supports.