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| 盾构隧道壁后注浆扩散模式及对管片的压力分析 | |
| 引用本文： | 叶飞,朱合华,何川.盾构隧道壁后注浆扩散模式及对管片的压力分析[J].岩土力学,2009,30(5):1307-1312. |
| 作者姓名： | 叶飞 朱合华 何川 |
| 作者单位： | 1. 长安大学,桥梁与隧道陕西省重点实验室,西安,710064;西南交通大学,地下工程系,成都,610031 2. 同济大学,岩土及地下工程教育部重点实验室,上海,200092 3. 西南交通大学,地下工程系,成都,610031 |
| 基金项目： | 国家自然科学基金，中国博士后科学基金，长安大学科学发展基金 |
| 摘 要： | 在假定注浆浆液为牛顿流体，并在盾尾间隙影响厚度范围内均匀柱面扩散的前提下，通过引入等效孔隙率替代土体本身的孔隙率来考虑建筑间隙的影响，对盾尾注浆和管片注浆2种情况下的浆液渗透范围及因注浆而对管片造成的压力进行了理论推导，得到了浆液扩散半径及对管片产生的压力计算式。结果表明，盾构隧道壁后注浆浆液的扩散半径及对管片产生的压力与注浆压力、注浆时间、土体特性及浆液性质等众多因素有关，盾尾注浆对管片产生的注浆压力小于管片注浆对管片产生的压力。在假定其他参数已知的条件下，通过一具体实例，讨论了盾尾注浆时浆液扩散半径及注浆对管片产生的压力与注浆压力及注浆时间的关系。结果显示，虽然增大注浆压力、延长注浆时间均能增大浆液的扩散半径及对管片产生的压力，但增长速度不尽相同。 |
| 关 键 词： | 盾构 隧道 盾尾注浆 管片 管片注浆 注浆压力 |
| 收稿时间： | 2007-09-03 |
Back-filled grouts diffusion model and its pressure to segments of shield tunnel |
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| YE Fei,ZHU He-hua,HE Chuan.Back-filled grouts diffusion model and its pressure to segments of shield tunnel[J].Rock and Soil Mechanics,2009,30(5):1307-1312. | |
| Authors: | YE Fei ZHU He-hua HE Chuan |
| Institution: | 1. Shaanxi Provincial Major Laboratory for Highway Bridge & Tunnel, Chang’an University, Xi’an 710064, China; 2. Department of Underground Engineering, Southwest Jiaotong University, Chengdu 610031, China; 3. Key Lab. of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China |
| Abstract: | Assuming that the back-filled grouts are Newtonian fluids, and the grouts diffuse with cylinder surface, the grouts diffusion radius and the pressure to shield tunnel segments in case of grouting at the tail as well as through segments, are studied by substituting the intrinsic void percent with the equivalent void percent of the soil to consider the influence of construction gap. As a result, the formula used to calculate the radius and the pressure are acquired. It is shown that the grouts diffusion radius and the pressure to segments are related to many factors, such as the grouting pressure, grouting time, characteristic of the surrounding soil and the grouts, etc. It is also shown that the pressure to the segments produced by grouting at the tail is less than grouting through segments. With other parameters known, the relationship between the grouts diffusion radius, pressure to segments, and the grouting pressure, grouting time is discussed by an engineering example, which shows that both the diffusion radius and the pressure to segments increase with the increase of the grouting pressure and grouting time, but their speeds are different. |
| Keywords: | shield tunnel grouting at the tail tunnel segments grouting through segments grouting pressure |
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