| 地层失水沉降诱发井筒破裂治理效果的三维数值分析 |
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| 引用本文： | 胡巍,隋旺华.地层失水沉降诱发井筒破裂治理效果的三维数值分析[J].岩土力学,2011,32(Z1):743-0748. |
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| 作者姓名： | 胡巍 隋旺华 |
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| 作者单位： | 中国矿业大学 深部岩土力学与地下工程国家重点实验室 资源与地球科学学院，江苏 徐州 221008 |
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| 基金项目： | 国家自然科学基金项目(No.40772192);深部岩土力学与地下工程国家重点实验室开放基金(No.SKLGDUEK0903) |
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| 摘 要： | 运用三维有限差分软件FLAC3D对破裂井筒的各种治理措施进行了数值模拟，分析评价了钢圈加固和喷射混凝土套壁、壁后注浆、地面注浆、开设卸压槽等各治理措施的工程效果。结果表明，钢圈加固和喷射混凝土套壁强度相对较小，适合紧急的抢险处理和防止破裂混凝土坠落，难以维持井壁的长期稳定；破壁注浆措施在一定程度上控制了井壁与土层相对位移的增大，防治井筒破裂效果良好，且预防性壁后注浆效果更为突出；地面注浆防治效果明显，在注浆孔数量不变的条件下，孔位的合理选择对保证地面注浆防治效果至关重要；卸压槽可以有效吸收纵向变形以抑制破裂井壁的发展，其开设在破裂处上部时，效果最好。分析结果可用于指导破裂井筒治理的设计与施工
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| 关 键 词： | 破裂井筒 治理措施 注浆 卸压槽 数值分析 |
| 收稿时间： | 2010-12-27 |
Three-dimensional numerical analysis of treatment efficiency for ruptured shafts due to strata dewatering settlement |
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| HU Wei,SUI Wang-hua.Three-dimensional numerical analysis of treatment efficiency for ruptured shafts due to strata dewatering settlement[J].Rock and Soil Mechanics,2011,32(Z1):743-0748. |
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| Authors: | HU Wei SUI Wang-hua |
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| Institution: | State Key Laboratory of Geomechanics and Deep Underground Engineering, School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China |
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| Abstract: | This paper presents an application of three-dimensional finite difference software FLAC3D to evaluate the efficiency of several treatment measures for shaft rupture induced by dewatering settlement. The treatment measures include steel set and shotcrete, grouting injection through fractured wall, surface grouting, and stress release slot in the inner shaft wall. The results indicates that the steel set and shotecrete method is suitable for emergency handling and preventing concrete collapse, but not suitable for long-term stability support. On the other hand, the injection through the shaft wall can control the displacement difference between the wall and soil to some extents. Therefore, this method, especially grouting before shaft rupture occurs is efficient for preventing shaft fracture. The surface grouting method has a good performance for solving the problem of shaft rupture. However, the locations of grout holes have significant influence on the efficiency of grouting under the same number of the holes. The stress release slot method can absorb the vertical strain and restraint the development of shaft rupture effectively. It works better when it is cut above the ruptured position. These results are helpful for the design and construction of shaft rupture treatment |
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| Keywords: | ruptured shaft treatment measures grouting stress release slot numerical analysis |
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