摘要
针对基坑开挖卸荷时土体的特殊应力应变关系,降水边界和桩土接触变化,提出了精细模拟方案:即利用HS模型来模拟基坑开挖卸荷情况下应力应变关系;考虑基坑侧降水对地表沉降的影响;在围护桩和土体之间施加Goodman接触面来模拟桩土间的滑移错位。对实例采用5种工况进行分析,并与实测结果相比较,结果证明该方法的正确性。
This paper presents the refined numerical modeling results of the deep excavation process by considering the special stress-strain relationship of the soil mass, dewatering boundary conditions as well as the soil-pile interactions. The Hardened Soil （HS） model is used in simulating the unloading conditions; the impact of dewatering on the ground subsidence. The Good- man type interface elements are applied at the contact areas between soil and soldier piles to simulate the sliding displacement between the pile and soil. Five conditions are analyzed and compared with the observed results in the case history. The analyzed results are consistent with the observed data.
出处
《土工基础》
2014年第4期70-72,85,共4页
Soil Engineering and Foundation
关键词
基坑
开挖
HS模型
桩土相互作用
Foundation Pits
Deep Excavations
Hardened Soil Model
Soil-Pile Interaction
