Estimation of Influence Scope of Lateral Displacement of Soft Ground under Vacuum Pressure with PVD
Estimation of Influence Scope of Lateral Displacement of Soft Ground under Vacuum Pressure with PVD
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PVD法估算真空压力下软土地基侧向位移影响范围
DOI：
10.1155/2018/8248049
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发表时间：
2018-08
影响因子：
1.8
通讯作者：
Xiuqing Hu
中科院分区：
文献类型：
--
作者：
Jinyun Liu;Hongtao Fu;Jun Wang;Yuanqiang Cai;Xiuqing Hu
在处理区施加真空压力不仅会引起竖向沉降和向内侧向位移，而且会在地表附近形成张裂缝。一般采用应变法计算处理区域边界处的侧向位移；然而，侧向位移的影响范围尚未提出。基于真空固结处理软粘土地基的现场数据，估算了影响范围内的侧向位移。为了计算真空压力引起侧向位移的影响范围，将影响范围内的侧向位移与处理区中心下地表沉降的比值定义为影响范围内的侧向位移（ELD）最大值。考虑预制垂直排水沟的长度，本文提出了ELD与与处理区域边界的距离（Lx）之间的直接关系。此外，采用有限元分析方法对真空预压加固软土地基的过程进行了数值模拟。模拟的影响范围与计算值Lx基本接近。据此，可以估算出采用真空预压法加固软土地基时处理区域边界与周围建筑物之间的安全距离。
The application of vacuum pressure to a treated area not only induces vertical settlement and inward lateral displacement but also causes the formation of tension cracks near the ground surface. In general, the strain method is applied to calculate the lateral displacement at the boundary of a treated area; however, the influence scope of lateral displacement has not yet been presented. Based on the in situ data of soft clayey soil foundation treated by vacuum consolidation, lateral displacement was estimated in the influence scope in this study. To calculate the influence scope of lateral displacement induced by vacuum pressure, the ratio of the lateral displacement within the influence scope to the ground surface settlement under the centre of the treated area is defined as the maximum value of the lateral displacement (ELD) within the influence scope. This paper proposes a direct relationship between ELD and the distance from the treated area boundary (Lx), considering the length of the prefabricated vertical drain. In addition, the FEA (finite-element analysis) is used to simulate the process of vacuum preloading to reinforce soft soil foundation. The influence scope simulated is almost close to the calculated value Lx. Accordingly, the safety distance between the boundary of the treated area and the surrounding building can be estimated when the soft soil foundation is consolidated by using a vacuum preloading method.
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DOI：
10.1007/978-94-017-9460-2_4
发表时间：
2015
期刊：
--
影响因子：
--
作者：
N. Yoshida
通讯作者：
N. Yoshida
DOI：
--
发表时间：
1973
期刊：
--
影响因子：
--
作者：
H. Poulos;E. Davis
通讯作者：
H. Poulos;E. Davis
影响因子：
1.5
作者：
Yang Xue-qiang
通讯作者：
Yang Xue-qiang
DOI：
10.1007/s11709-011-0110-1
发表时间：
2011-05
期刊：
Frontiers of Architecture and Civil Engineering in China
影响因子：
--
作者：
C. Ong;J. Chai
通讯作者：
C. Ong;J. Chai
DOI：
10.1061/(asce)gt.1943-5606.0000519
发表时间：
2011-11
影响因子：
3.9
作者：
B. Indraratna;Cholachat Rujikiatkamjorn;J. Ameratunga;P. Boyle
通讯作者：
B. Indraratna;Cholachat Rujikiatkamjorn;J. Ameratunga;P. Boyle