软土地区素混凝土桩单桩承载力不足原因分析及处理  

ANALYSIS AND TREATMENT OF INSUFFICIENT BEARING CAPACITY OF SINGLEPLAIN CONCRETE PILE IN SOFT sOIl AREAS

作　　者：卓志飞 付文光 周凯 龚文耀 ZHUO Zhi-fei;FU Wen-guang;ZHOU Kai;GONG Wen-yao(Guangdong Zhongmei Jiangnan Engineering Survey and Design Co.,Ltd.,518000,Shenzhen,Guangdong,China;Shenzhen Geokey Group Co.,Ltd.,518000,Shenzhen,Guangdong,China)

机构地区：[1]广东中煤江南工程勘测设计有限公司,广东深圳518000 [2]深圳市工勘岩土集团有限公司,广东深圳518000

出　　处：《建筑技术》2023年第10期1199-1201,共3页Architecture Technology

摘　　要：低强度等级素混凝土桩(LC桩)由于其工作原理及经济等因素,应用前景十分广泛。从工程实例出发探讨了素混凝土桩桩端入中低压缩性土深度的问题,提出桩端入中低压缩性土的深度适当加大(3~4 m为宜),有益于提高LC桩单桩承载力,降低工程造价,提高经济效益,同时淤泥地基中素混凝土桩的单桩承载力计算不宜考虑淤泥的侧摩阻力,会导致计算的单桩承载力偏大。Low strength grade plain concrete piles(LC piles)have a wide range of application prospects due to their working principles and economic factors.This paper probes into the problem of the depth of the plain concrete pile tip into the medium low compressibility soil from the engineering example,and puts forward that the depth of the pile tip into the medium low compressibility soil should be appropriately increased(3~4 m is appropriate),which is beneficial to improving the bearing capacity of the LC pile single pile,reducing the engineering cost,and improving the economic benefits.At the same time,the calculation of the bearing capacity of the plain concrete pile single pile in the silt foundation should not consider the lateral friction of the silt,which will lead to the calculated bearing capacity of the single pile being too large.

关 键 词：软土 LC桩 单桩承载力 侧摩阻力 桩端嵌固深度 

分 类 号：TU473[建筑科学—结构工程]