钱塘江边冲海积粉土基坑性状研究

杨迎晓; 龚晓南; 张雪婵; 靳建明; 张智卿; 徐毅青

钱塘江边冲海积粉土基坑性状研究 English Version

(1.浙江树人大学城建学院，浙江杭州 310015；2. 浙江大学岩土工程研究所，浙江杭州 310058)

详细信息

作者简介:
杨迎晓(1963– )，女，浙江嘉兴人，博士，教授，主要从事土力学等方面的研究与教学工作。

中图分类号: TU44
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出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Behaviors of alluvial silt foundation pits along Qiantang River

(1. Urban Construction College, Zhejiang Shuren University, Hangzhou 310015, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China)

摘要

摘要: 钱塘江河口沿江的水文、地质条件复杂，江边粉土基坑面临洪水、强潮威胁。在大量工程调研的基础上，选择钱塘江杭州段海塘和地质典型断面，对钱塘江高潮位及设计洪水位，分基坑离江距离、坑底加固、开挖深度、围护墙插入深度对江边冲海积粉土基坑性状的影响进行了数值研究。结果表明：江边粉土基坑在江水位作用下变形大；坑底加固对粉土基坑效果显著；江边粉土基坑围护结构底部区域的流速大、流网密集，应采取措施尽量降低基坑内外水头差，当止水帷幕漏水时，应有紧急应付漏水的对策。数值模拟结果为工程设计提供依据和参考。
- 钱塘江冲海积粉土 /
- 江边基坑 /
- 江水位 /
- 变形 /
- 数值分析
Abstract: The hydrological and geological conditions of Qiantang River estuary are very complicated. The foundation pits along it are threatened by floods and strong tides. Based on the intensive investigations of projects, seawalls and typical geological cross sections of Hangzhou reach of Qiangtang River are selected to conduct numerical studies on the effects of high tidal level and design flood level of Qiangtang River, distance of pit from the river, reinforcement of the pit bottom, excavation depth and insertion depth of enclosure walls on the bebaviors of the alluvial silt foundation pits. The results reveal that (1) the silt pits along the river undergo large deformations under the effects of water levels, (2) the improvement by the reinforcement of pit bottoms is noticeable, (3) the seepage at the bottom of the enclosure structures for the silt pits is fast and the flows are concentrated, thus measures should be taken to lower the water head differences between the inside and the outside of the pits, and when cut-off walls leak, emergency countermeasures should be taken. The numerical results offer references for engineering design.
- Qiantang River alluvial silt /
- riverside pit /
- water level /
- deformation /
- numerical analysis

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参考文献(8)

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