冲孔桩在预应力管桩施工断桩中的替代技术

冲孔桩在预应力管桩施工断桩中的替代技术冲孔桩在预应力管桩施工断桩中的替代技术 摘 要：近年来在房建工程基础工程中，预应力管桩获得大量应用，但基础工程场地内的孤石地质，常造成预应力管桩在施工中断桩，某些类型的承台，因预应力管桩补桩失败或者超前钻推断无有效补桩位，就需要用冲孔桩破裂或穿越孤石，以冲孔桩承台或冲孔桩―预应力管桩联合承台替代预应力管桩承台工作。本文通过总结深业?御泉山庄预应力管桩工程的冲孔桩替代施工，为预应力管桩和冲孔桩基础工程提供技术参考。 关键词：预应力管桩；冲孔桩；施工断桩；替代 Abstract: In recent years, in construction engineering foundation engineering, prestressed pipe pile to obtain a large number of applications, but the basic engineering geological site within the boulders, often resulting in construction of prestressed pipe pile broken pile, some types of caps, prestressed concrete pipe piles due to failure or advance drilling judgment without effective fill pile, need to use punched pile broken or through the boulder, the punching pile or pile of prestressed pipe pile joint pile punching instead of prestressed pipe pile cap work. This article summarizes the Shenye, Yuquan villa prestress pipe pile project of punched pile construction for replacement, prestressed pipe pile and bored pile foundation works to provide technical reference. Key words: prestressed concrete pipe pile; bored pile broken pile; construction; alternative 中图分类号：TU394 文献标识码：文章编号： 1、前言 近年来在房建工程中，预应力管桩因为造价相对便宜，桩的工厂制造质量较易保证，现场施工快捷，在基础工程中获得大量应用。但对于存在一定范围孤石地质情况的工程场地，预应力管桩在施工中难以避开会因为孤石造成断桩。对于断桩，需要根据承台类型和断桩在承台内的位置进行补桩，但某些承台因断桩较多或补桩又断桩，导致预应力管桩承台不能施工成功，就只能用破裂或穿越孤石能力较强的冲孔桩替代，以保证在孤石密集区域桩基础施工成功。 2、工程概述 深业?御泉山庄位于广东省东莞...