| 土工袋技术在市政沟槽回填中的应用研究 |
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| 引用本文： | 刘斯宏,高军军,王子健,王柳江,胡晓平.土工袋技术在市政沟槽回填中的应用研究[J].岩土力学,2014,35(3):765-771. |
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| 作者姓名： | 刘斯宏 高军军 王子健 王柳江 胡晓平 |
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| 作者单位： | 1. 河海大学 水利水电学院，南京 210098；2. 南京陆屿工程技术公司，南京 210098 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目（No.2010515911） |
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| 摘 要： | 市政工程中管线埋入地下采用的基本流程是先开挖沟槽,将开挖的原土作为渣土处理,待管线在沟槽中安放后再用二灰土石填埋沟槽,经夯实后铺设沥青或混凝土路面。为了有效利用沟槽开挖土、减少二灰土石用量,建议采用土工袋技术处理,即将沟槽开挖土装入土工编织袋后回填至沟槽中。阐述了土工袋技术原理,并依托南京市雨污分流工程,对用土工袋回填的沟槽进行了平板载荷试验、落锤式挠度检测和路面振动测试,评价土工袋沟槽的回填效果。结果表明:土工袋在提高沟槽承载力、减少沉降变形、削弱交通振动干扰等方面具有明显效果。土工袋避免弃土外运,减少了扬尘污染,不失为一种绿色、环保、经济的工程新技术。
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| 关 键 词： | 沟槽回填 土工袋技术 承载力 沉降 减振隔振 |
| 收稿时间： | 2013-01-17 |
Application of soilbags to urban trench backfill |
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| LIU Si-hong,GAO Jun-jun,WANG Zi-jiang,WANG Liu-jiang,HU Xiao-ping.Application of soilbags to urban trench backfill[J].Rock and Soil Mechanics,2014,35(3):765-771. |
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| Authors: | LIU Si-hong GAO Jun-jun WANG Zi-jiang WANG Liu-jiang HU Xiao-ping |
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| Institution: | 1.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; 2. Nanjing Luyu Engineering Co., Ltd., Nanjing 210098, China |
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| Abstract: | The basic way to bury pipelines into ground in the municipal projects is: excavating a trench firstly, and throwing away the excavated soils as wastes; backfilling the expensive lime-ash soil into the trench after the pipelines are placed properly; tamping foundation and laying asphalt or concrete pavements. In consideration of recycling the excavated soils and reducing the use of lime-ash soil, soilbag technique is suggested in urban trench backfills so as to cut down the project costs. The mechanism of soilbag technique is briefly elucidated herein; and several field tests such as plate loading test, falling-weight deflection and vibration response measurements are then carried out respectively to evaluate the benefits of a soilbag-trench, with the strong support of the Rain and Sewage Diversion Project in Nanjing. The test results show that soilbag technique performances superbly in improving the bearing capacity of subgrade, decreasing the settlement of roadbed as well as in reducing and isolating the traffic-induced vibrations, compared with the common backfill scheme. It is also proved that backfilling the trench with soilbags is a new green, environment-friendly and economical approach for the municipal projects as a result of avoiding the removal of discarded soils and controlling the pollution of raised dust. |
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| Keywords: | trench backfill soilbag technique bearing capacity settlement vibration reduction and isolation |
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