| 热力隧道下穿地面建筑物的安全评价与对策 |
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| 引用本文： | 姚海波,王梦恕,张顶立,孔恒.热力隧道下穿地面建筑物的安全评价与对策[J].岩土力学,2006,27(1):112-116. |
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| 作者姓名： | 姚海波 王梦恕 张顶立 孔恒 |
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| 作者单位： | 1. 北京交通大学,隧道研究中心,北京,100044
2. 北京市政工程总公司,北京,100045 |
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| 摘 要： | 在北京市北三环路和平东桥－太阳宫西路段热力管线工程中，依据设计热力隧道要下穿一处面积为23.4 m× 24.5 m的地表一层砖砌群房。由于隧道埋藏浅，且所处于富水粉质粘土之中，其抗扰动能力很差，常规的施工降水对强化土体效果甚微，经评价认为，普通的施工方法必然会造成很大的地表沉降而危及地表房屋安全，同时，由于土体自稳能力极低，对施工亦存在很大的安全隐患。基于此，选定在不降水的条件下，采用水平长管棚支护技术和在隧道上半断面注浆技术，实现阻水、固土、均一沉降的目的，其有效地控制了土体沉降，保证了隧道安全贯通和地表建筑的安全使用。
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| 关 键 词： | 安全 热力隧道 穿越 长管棚 注浆 |
| 文章编号： | 1000-7598-（2006）01-0112-05 |
| 收稿时间： | 2004-08-09 |
| 修稿时间： | 2004-08-09 |
Security aspect and measurements while tunneling of the thermal power tunnel from below buildings on ground surface |
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| YAO Hai-bo,WANG Meng-shu,ZHANG Ding-li,KONG heng.Security aspect and measurements while tunneling of the thermal power tunnel from below buildings on ground surface[J].Rock and Soil Mechanics,2006,27(1):112-116. |
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| Authors: | YAO Hai-bo WANG Meng-shu ZHANG Ding-li KONG heng |
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| Institution: | 1.Research Center of Tunneling and Underground Works, Beijing Jiaotong University, Beijing 100044, China; 2.Beijing Municipal Engineering Corporation, Beijing 100045, China |
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| Abstract: | During construction of Hepingdong Bridge – Sun Palace thermal power pipeline in Northern third loop road of Beijing City, the pipeline tunnel would go through beneath a couple of single-floor houses, whose area is 23.4 m×24.5 m. Due to the shallow overburden and the saturated microfine sandy clay, which is plastic and soft plastic, the strata is very weak in resisting interruption. The traditional dewatering is limited to improve the nature of the strata. Based on calculation, it is believed that the common construction method would necessarily cause much settlement and endanger the houses. Meanwhile, as the strata are hard to stand up, safety problems may be triggered in construction. In view of these, the level long steel pipes are adopted to support soil mass and grouting in the upper half face of the tunnel is operated to prevent ground water and strengthen soil without dewatering. These two methods effectively control the settlement of ground surface and ensure the perforation of the tunnel in time and running of the houses in security. |
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| Keywords: | secudty thermal power tunnel going through long steel pipe grouting |
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