岩溶地区端承摩擦桩复合桩基的工程实践

Engineering Practice Of Composite Pile Foundation With End-Bearing Friction Pile In Karst Area

岩溶地区通常采用常规的桩基方案,需先进行一桩一孔的施工勘察,而且桩基需穿透土洞和溶洞,桩长较长,不仅工期长造价高,也不利于对成桩质量的控制。本文通过工程实践,详细介绍了岩溶地区端承摩擦桩复合桩基的应用,包括基础选型过程、基础设计过程和现场实测检验结果。本工程采用复合桩基的设计方法在保证结构安全的前提下,同时可取得显著的经济效益,本案例可供同类工程借鉴。

The conventional pile foundation scheme is usually adopted in karst areas,which requires the construction survey of one hole for one pile first,and the pile foundation needs to penetrate the soil cave and karst cave.The long pile length results in a long construction period and high cost,and also not conducive to the control of pile quality.Based on an engineering practice,this paper introduces in detail the application of end-bearing friction pile composite foundation in karst area,including the foundation selection process,foundation design process and field test.This project adopts the design method of composite pile foundation to ensure the structure safety,and can obtain significant economic benefits at the same time.This case can be used as a reference for similar projects.