某海相淤泥土层地区钻孔压灌桩基础事故原因分析与加固处理  

Accident Analysis and Reinforce Treatment for Drill Grouting Piles Foundation of Marine Mucky Soil Area

作　　者：舒昭然[1] 曹瑞钠[1] 刘忠昌[1] Shu Zhaoran;Cao Ruina;Liu Zhongchang(Liaoning Provincial Building Design Research Institute Geotechnical Engineering Company,$henyang 110005,Liaoning,China)

机构地区：[1]辽宁省建筑设计研究院岩土工程公司,辽宁沈阳110005

出　　处：《岩土工程技术》2018年第5期222-225,共4页Geotechnical Engineering Technique

摘　　要：针对某海相淤泥土层地区钻孔压灌桩基础出现多数桩身完整性和承载力不满足设计要求的的现象进行分析,发现在新近沉积的海相淤泥土层中进行钻孔压灌桩施工易出现混凝土窜孔、流失等现象,是造成桩身缺陷的主要原因。同时,还探讨如何根据验收检测、扩大检测及设计荷载复核等手段,在现有桩基础承载力得到充分发挥的基础上,对桩基础进行加固处理,从而较大地节省了加固成本。This article analyses the pile foundation which is not qualified for the integrity and bearing capacity by the drill grouting piles test in the marine mucky soil area. The main reason has been found out that the drill grouting piles in marine mucky soil area will lead to concrete excursion and erosion. Meantime, this article also studied how to utilize the current pile foundation bearing capacity via acceptance test, additional test and design load audit, further strengthen the pile foundation and save invest cost.

关 键 词：钻孔压灌桩 单桩承载力 桩身完整性 基础加固 海相淤泥土层 

分 类 号：TU473.1[建筑科学—结构工程]