基坑锚碇板-桩支护结构受力与变形试验研究

Experimental Study on Stress and Deformation of Anchor Plate-pile Supporting Structure in Foundation Pit

锚碇板-桩结构是港口码头常用的支护结构形式,可应用在支护后方场地宽敞、宽度较大的建筑基坑支护中,依靠大尺寸板与板前填土产生的被动土压力提供的锚固反力为支护结构提供支护力,具有结构形式简单、造价低廉、施工周期短等独特优点。文章以深圳机场新航站楼轨道基坑预留工程围护结构为工程案例,分析总结了锚碇板-桩支护结构的计算与方案设计,以现场锚碇板基本试验为依据,分析其受力与变形过程,详细论述锚碇板工作机理,为其应用推广提供工程经验。

Anchor plate-pile structure is a common supporting structure in wharf,which is fit for the pile pit supporting behind where there has roomy place and fat width.The anchor plate-pile structure provides anchoring strength depending on the passive earth pressure resulting from the its large size and the soil in front of the plate,having many unique advantages such as economy,simple structure,short construction period and so on.This paper takes Shenzhen airport terminal orbit reserving foundation pit retaining engineering structure as an example,analyzing and summarizing the computation and conceptual design of the anchor plate-pile structure.Based on field anchorage plant basic test,this paper analyzes the stress and deformation process,elaborates the working mechanism of anchor plate so as to provide engineering experience for its application promotion.