摘要
基床系数是隧道、基坑设计的重要参数,一般要求采用K_(30)载荷板试验求取,但受场地、安全等因素制约,K_(30)载荷板试验往往很难进行,本文通过取土室内试验、标准贯入试验、重型动力触探试验、旁压试验、螺旋板载荷试验等较易实现的手段求取基床系数,并与现场K_(30)试验值进行对比,验证了各种原位测试求取基床系数的有效性,对花岗岩残积土基床系数的求取有一定借鉴作用。
The coefficients of subgrade are important parameters in the design of tunnel and foundation pit. The coefficients are commonly obtained from K30 plate loading tests which are hard to implement owing to the restriction of ground and safety factors. Some methods such as laboratory soil tests, standard penetration tests, heavy dynamic sounding tests, pressuremeter tests and screw plate loading tests are easy to obtain the coefficients. The results obtained from the methods are compared with those from K30 plate loading tests, which indicate the validity to solve the coefficients of subgrade from in-situ tests. The methods are helpful to obtain the subgrade coefficients of granite residual soil.
出处
《工程勘察》
CSCD
北大核心
2008年第9期11-13,共3页
Geotechnical Investigation & Surveying
关键词
花岗岩
残积土
基床系数
granite
residual soil
coefficient of subgrade
