摘要
应用饱和-非饱和渗流理论,对某临河基坑进行了渗流计算,评价了基坑的渗透稳定性,并确定了基坑的最佳防渗措施及相应的参数。计算结果表明:无防渗措施时,基坑坡面土体在渗透压力作用下是不稳定的,必须采取防渗措施。从便于施工的角度考虑,采用钢板桩防渗,其位置定在距基坑右边坡6.0 m处。钢板桩长度对渗流场影响显著,钢板桩应穿过粉砂层,这样才能起到较好的防渗效果,有利于基坑边坡的稳定;同时也不宜太长,太长不仅浪费材料,效果也不会更好,最佳长度应为15.4 m。
Saturated-unsaturated seepage theory is applied to calculate seepage in riverside foundation pit; and the seepage stability of the foundation pit is evaluated; also the best anti-seepage measures and corresponding parameters of this foundation pit are determined. The results show that the slope soil of foundation pit is instable without anti-seepage measures, so that the anti-seepage measures must be adopted. The steel sheet piles are adopted from the perspectives of convenient for construction; it is located at about 6.0 m distance to the foundation pit＇s right slope. The length of steel sheet pile has remarkable effect on the seepage field; they should drill through silty sand layer, thus can play a better anti-seepage effect, so as to benifit the stability of foundation pit slope. In addition the steel sheet pile should not too long, because increasing the length of steel sheet pile not only waste materials, but also the effect is not better; the best length is 15.4m.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第5期1425-1430,共6页
Rock and Soil Mechanics
关键词
基坑
防渗措施
饱和-非饱和渗流
foundation pit
anti-seepage measure
saturated-unsaturated seepage
