土工织物复合垫层法在新吹填软土地基加固中的应用与效果分析

陈运涛; 王贵君; 孟凡强; 许岩

doi:10.11779/CJGE2016S1032

土工织物复合垫层法在新吹填软土地基加固中的应用与效果分析 English Version

1. 河北工业大学,天津 300401;
2.中交天津港湾工程研究院有限公司,港口岩土工程技术交通行业重点实验室,天津市港口岩土工程技术重点实验室,天津 300222;
3. 天津泰达海洋开发有限公司,天津 300480

基金项目: 河北省应用基础研究计划重点基础研究项目（14965409D）

详细信息

作者简介:
陈运涛(1980- ),男,高级工程师,主要从事软土地基处理方面的科研工作。E-mail: chenyuntao@163.com。

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出版历程
- 收稿日期: 2015-11-29
- 发布日期: 2016-03-24

Application and analysis of the geotextile composite cushion in the ground improvement of the new dredger fill

1. Hebei University of Technology, Tianjin 300401, China;
2. CCCC Tianjin Port Engineering Institute Co., Ltd., Key Laboratory of Port Geotechnical Engineering of the Ministry of Communication, Key Laboratory of Port Geotechnical Engineering of Tianjin, Tianjin 300222, China;
3. Tianjin Teda Ocean Development Co., Ltd., Tianjin 300480, China

摘要

摘要: 使用真空预压工艺加固软土地基时通常使用中粗砂作为水平排水通道。针对铺设土工织物复合垫层的新吹填软土地基加固试验区为研究背景,解决了水平排水系统、人造表层硬壳层和轻型插板设备等关键施工技术。通过加固过程中对孔隙水压力和地表沉降的监测,掌握了该工艺地基土体变形规律;加固前后取土和地基承载力检测数据表明加固后吹填土层含水率、孔隙比明显减小,地基承载力达到80 kPa。试验数据证明采用土工织物复合垫层可有效替代传统中粗砂垫层,为后续大面积地基处理工程提供了参考。
- 土工织物 /
- 复合垫层 /
- 新吹填土 /
- 地基加固 /
- 工程实例
Abstract: The vacuum preloading technology for reinforcing soft soil foundation often uses the coarse sand as the horizontal drainage channel. For laying geotextile composite cushion in the new dredger fill soft soil ground, key construction techniques such as horizontal drainage systems, artificial surface crust layer and light board equipment are achieved. By monitoring pore water pressure and surface subsidence, during improvement , the deformation law of foundation soil is grasped. The test data of bearing capacities of foundation and soil before and after improvement show that the water content, void ratio of reclaimed soil decrease obviously after improvement, and the bearing capacity of foundation is up to 80 kPa. The test data indicate that the geotextiles in composite cushion can effectively replace traditional coarse sand cushion. It may provide reference for soft ground improvement of subsequent large-area foundation.
- geotextile /
- composite cushion /
- new dredger fill /
- foundation reinforcement /
- engineering example

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参考文献(6)

[1]	娄炎. 真空排水预压法加固软土技术[M]. 北京: 人民交通出版社, 2002. (YAN Lou. The vacuum preloading method for soft soil improvement[M]. Beijing: China Communication Press, 2002. (in Chinese))
[2]	KJELLMAN W. Consolidation of clay soil by means of atmospheric pressure[C]// Proc Conference on Soil Stabilization MIT. Boston, 1952: 258-263.
[3]	ZHOU Jian, SU Yan, JIA Min-cai, LIU Yang. In-situ tests on vacuum dynamic consolidation to improve a hydraulic fill ground[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(9): 1091-1096.
[4]	CAO Yong-hua, CHEN Yun-tao. Recent advance of horizontal drainage cushion in vacuum preloading method[J]. Applied Mechanics and Materials, 2013(353/354/355/356): 7-10.
[5]	雷华阳, 张文振, 韩鹏, 等. 吹填超软土浅层真空预压加固处理前后的固结特性[J]. 岩土工程学报, 2013, 35(12): 2328-2333. (LEI Hua-yang, ZHANG Wen-zhen, HAN Peng, et al. Consolidation property of ultra soft soils before and after treatment of surface-layer improvement by vacuum preloading[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(12): 2328-2333. (in Chinese)).
[6]	GB 50007—2011 建筑地基基础设计规范[S]. 北京: 中国建筑工业出版社, 2011. (GB 50007—2011 Code for design of building foundation[S]. Beijing: China Architecture and Building Press, 2011. (in Chinese))