排桩冻结法中冻土壁对排桩作用力的分析

张菊连; 梁志荣

排桩冻结法中冻土壁对排桩作用力的分析 English Version

(上海申元岩土工程有限公司，上海 200040）

详细信息

作者简介:
张菊连(1984– )，女，江西丰城人，博士，工程师，主要从事边坡及基坑工程等方面的设计和研究工作。

中图分类号: TU473
计量
- 文章访问数: 1107
- HTML全文浏览量: 0
- PDF下载量: 376
出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Frost heaving force on row piles in freezing method

(Shanghai Shenyuan Geotechnical Engineering Co., Ltd, Shanghai 200040, China)

摘要

摘要: 通过对润扬长江公路大桥南汊悬索桥南锚碇基础实测桩体和土体测斜资料的分析，认为基坑采用冻结法作止水帷幕后，埋深一定深度以上坑外土体处于压密状态、这一深度以下土体处于松塌状态，提出这一埋深以上土压力应按被动土压力理论进行计算、下段土压力可按主动土压力理论进行计算的设计理念；同时认为作用在排桩上的力与冻结过程中产生的冻胀力、以及冻土壁后侧的土压力大小相等。这一工程中，与采用常规止水桩的排桩支护相比，排桩所受的力为被动状态下的土压力，实测值大于常规按主动土压力计算的37%～184%。上述设计理念和结论可为冻结法基坑围护设计提供一般理论参考。
- 冻胀力 /
- 基坑 /
- 围护设计 /
- 主动土压力 /
- 被动土压力
Abstract: Based on the monitoring data of bored pile and soil slope of south anchor foundation of Runyang Yangtze River Suspension Bridge, the soil above certain depth is in compaction state, and the soil below it is in loose state. Thus it is proposed that the soil pressure on froze wall above this depth is the passive pressure and that below it is the active pressure, and the forces should be calculated by the theories of the passive and active earth pressures, respectively. Meantime, a conclusion is drawn that the force on the pile in row, the frost-heaving force caused by the frozen wall and the soil pressure on the frozen wall are the same in value. Compared with the piles in row with conventional sealing piles, the force on piles is earth pressure in passive state, and it is 37% to 184% greater than the active earth pressure calculated by the conventional theory. The above results provide a theoretical reference for the design of excavations by means of the freezing method.
- frost-heaving force /
- excavation /
- support design /
- active earth pressure /
- passive earth pressure

HTML全文

参考文献(9)

[1]	黄建华. 深基坑冻结止水帷幕冻胀变形模拟分析与试验测试[J]. 岩石力学与工程学报, 2009, 28(12): 2554–2560. (HUANG Jian-hua. Simulation analysis and experimental test on frost deformation of freezing waterproof curtain in deep foundation pit[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(12): 2554–2560. (in Chinese))
[2]	杨更社, 张晶. 非均匀温度分布冻土墙围护深基坑开挖的有限元数值模拟[J]. 岩石力学与工程学报, 2003, 22(2): 316–320. (YANG Geng-she, ZHANG Jing. Finite element numerical simulation of deep foundation pit excavation supported by frozen soil wall with non-homogeneous temperature distribution[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(2): 316–320. (in Chinese))
[3]	金永军, 杨维好. 冻土直墙用于基坑支护的研究[J]. 岩石力学与工程学报, 2004, 23(13): 2280–2285. (JIN Yong-jun, YANG Wei-hao. Application of linear frozen soil wall to support of foundation pit[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(13): 2280–2285. (in Chinese))
[4]	姚直书, 程桦. 锚碇深基坑排桩冻土墙围护结构的冻胀力研究[J]. 岩石力学与工程学报, 2004, 23(9): 1521–1524. (YAO Zhi-shu, CHEN Hua. Study on frost-heaving force in retaining structure with Row-pile and frozen soil wall for deep foundation pit[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(9): 1521–1524. (in Chinese))
[5]	崔托维奇 H A. 冻土力学[M]. 北京: 科学出版社, 1985: 108–151. (CUI BULATOVIC H A. frozen soil mechanics[M]. Beijing: Science Press, 1985: 108–151. (in Chinese))
[6]	裴捷. 润扬长江公路大桥悬索桥南锚碇深基坑排桩冻结工法研究–基坑施工监测[R]. 上海: 上海申元岩土工程有限公司, 2003. (PEI Jie. Study on row-pile of freezing method in runyang yangtze river suspension bridge south anchorage deep foundation-pit construction monitoring[R]. Shanghai: Shanghai Shenyuan Geotechnical Engineering, 2003. (in Chinese))
[7]	JGJ 120—99建筑基坑支护技术规程[S]. 中国建筑科学研究院, 1999: 10–13. (JGJ 120—99 Construction Department of Shandong Province. Technical Specification for Retaining and Protection of Building Foundation Excavations JGJ 120-9 [S]. 1999: 10–13. (in Chinese))
[8]	J 11577—2010基坑工程技术规范[S]. 上海, 2010. (J 11577—2010 Shanghai Survey and Design Industry Association. Technical code for Excavation engineering[S]. Shanghai, 2010. (in Chinese))
[9]	刘国彬, 王卫东. 基坑工程手册[M]. 2版. 北京: 中国建筑出版社, 2009. (LIU Guo-bin, WANG Wei-dong. excavation engineering manual[M]. 2nd ed. Beijing: China Architectural Press, 2009. (in Chinese))