砂砾桩在公路软土地基处理中的试验研究.doc

文档介绍：砂砾桩在公路软土地基处理中的试验研究
赵文强

黄志军
(,甘肃兰州 730070;,甘肃兰
州 730070)
摘要:由于软土地基所具有的承载能力偏低等特性,对公路的正常安全使用有较大影响,
一般在软土地基上进行工程建设时需要对软土地基进行加固处理。本文是在碎石桩处理软土
地基原理的基础上,结合实际工程场地工程地质、水文地质特点和施工条件,因地制宜地提
出了采用砂砾桩对依托工程地基进行处理,并通过载荷试验、动力触探试验等原位试验对砂
砾桩处理依托工程场地效果进行了检验,现场试验结果表明砂砾桩处理该场地软土地基效果
明显,可以达到提高地基承载能力、减小地基变形的目的。论文研究成果为类似条件下软弱
地基土处理提供了一定的工程试验经验。
关键词:软土地基;砂砾桩;原位试验;地基承载能力
Experimental study of Sand-gravel pile on Soft Soil Foundation of Highway
ZHAO Wen-qiang

HUANG Zhi-jun
(1. The key Laboratory of Road and Bridge and Underground Engineering of Gansu province,Lanzhou Gansu 730070,China;
of Civil Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070, China)
Abstract: Soft soil foundation’s characteristics, such as low bearing capacity, have great influence
on the normal safety use of the highway. T As a result, the general construction on soft soil
foundation requires reinforcement of soft soil foundation. This article is based on the principle of
gravel pile treatment of soft soil foundation, combined with the site engineering geological, hydro
geological characteristics and construction conditions of the actual project, it suits measures to
local conditions to put forward the method to treat the engineering foundation by using the
sand-gravel pile. In addition, through some in-situ tests such as the loading test, dynamic
ration