Ground settlement induced by excavation of pile-anchor retainingfoundation pits in soil-rock mixed areas
-
摘要: 针对青岛地区典型桩锚支护结构型式的土岩组合基坑，通过有限元模拟，对土层厚度、锚杆布设、支护桩嵌入岩层的相对深度、岩层组成及开挖方式等不同条件下基坑开挖引起的地表沉降特征进行了计算分析，在基坑地表沉降模式、灌注桩的嵌岩比、基坑开挖影响范围、地表沉降与桩体水平位移的关系等方面得到了一些定性和定量的基本规律，可为类似基坑工程的设计开挖提供借鉴。Abstract: Taking a typical pile-anchor retaining deep foundation pit in Qingdao soil-rock area as an example and by using the finite element numerical simulation, the surface settlement characteristics induced by excavation are investigated under different conditions such as soil thickness, anchor layout, socket depth of retaining pile in rock, rock layers and excavation methods. For the ground surface settlement curve, insertion ratio of pile in rock, settlement influence zone and relation between the surface settlement and the pile displacement, some conclusions are drawn, and they may be helpful for similar projects.
-
[1] 聂宗泉, 张尚根, 孟少平. 软土深基坑开挖地表沉降评估方法研究[J]. 岩土工程学报, 2008, 30(8): 1218–1223. (NIE Zong-quan, ZHANG Shang-gen, MENG Shao-ping. Surface settlement of deep foundation pits by excavation[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(8): 1218–1223. (in Chinese)) [2] 杨 敏, 卢俊义. 基坑开挖引起的地面沉降估算[J]. 岩土工程学报, 2010, 32(12): 1821–1828. (YANG Min, LU Jun-yi. Estimation of ground settlement aroused by deep excavation[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(12): 1821–1828. (in Chinese)) [3] 应宏伟, 杨永文. 杭州深厚软黏土中某深大基坑的性状研究[J]. 岩土工程学报, 2011, 33(12): 1838–1846. (YING Hong-wei, YANG Yong-wen. Characteristics of a large and deep soft clay excavation in Hangzhou[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(12): 1838–1846. (in Chinese)) [4] 李明瑛, 曾 朋. 基于MIDAS深基坑桩锚支护数值模拟分析[J]. 水土保持研究, 2012, 19 (1): 250–253. (LI Ming-ying, ZENG Peng. Numercal simulation analysis of pile-anchor retaining in deep foundation based on MIDAS[J]. Research of Soil and Water Conservation, 2012, 19(1): 250–253. (in Chinese)) [5] 刘红军, 李 东, 孙 涛, 等. 二元结构岩土基坑“吊脚桩”支护设计数值分析[J]. 土木建筑与环境工程, 2009, 31(5): 43–48. (LIU Hong-jun, LI Dong, SUN Tao, et al. Numerical analysis on design of dualistic foundation pit with ‘end-suspended pile’[J]. Journal of Civil, Architectural & Environmental Engineering, 2009, 31(5): 43–48. (in Chinese))
计量
- 文章访问数:
- HTML全文浏览量: 0
- PDF下载量:
下载:
