内水压力下水工隧洞衬砌与围岩承载特性研究

›› 2010, Vol. 31 ›› Issue (8): 2407-2412.

内水压力下水工隧洞衬砌与围岩承载特性研究

苏凯，伍鹤皋，周创兵

武汉大学水资源与水电工程科学国家重点实验室，武汉 430072

收稿日期:2009-02-23 出版日期:2010-08-10 发布日期:2010-08-30
作者简介:苏凯，男，1977年生，博士，副教授，主要从事水工建筑科研与教学工作。
基金资助:
国家杰出青年科学基金(No. 50725931)；国家自然科学基金资助项目(No.50809051)；国家自然科学基金委和雅砻江水电开发联合研究基金资助项目(No. 50539100)。

Study of combined bearing characteristics of lining and surrounding rock for hydraulic tunnel under internal water pressure

SU Kai, WU He-gao, ZHOU Chuang-bing

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072,China

Received:2009-02-23 Online:2010-08-10 Published:2010-08-30

摘要/Abstract

摘要：

衬砌与围岩是水工隧洞的主要组成部分，内水压力是其承担的主要荷载之一。采用轴对称计算模型，以衬砌与围岩间接触应力状态为判断标准，研究了衬砌混凝土开裂前后围岩渗透系数、变形模量等材料参数对衬砌与围岩联合承载特性的影响，详细地介绍了透水衬砌的设计方法和计算过程，以混凝土最大裂缝宽度为控制标准，编制了透水衬砌结构计算与配筋设计程序，并给出了算例验证。计算结果表明，围岩渗透系数是隧洞结构设计的关键，与围岩变形模量具有同等重要作用；围岩透水性越差或变形模量越低，衬砌与围岩越容易脱开；与混凝土开裂前相比，混凝土开裂后，衬砌与围岩更容易脱开；与钢板衬砌方案相比，钢筋混凝土衬砌方案可以很大程度地减小钢材用量；建议高压钢筋混凝土衬砌隧洞设计、施工时，应尽可能地保持围岩的完整性，并进行细致周密的固结灌浆，以增强围岩抗渗能力。

关键词: 水工隧洞, 内水压力, 联合承载

Abstract:

Internal water pressure is one of the main kinds of loads acting on hydraulic tunnel, which consists of lining and surrounding rock. The axisymmetrical model is adopted and the corresponding formulas are carried out. The radial stress on interface is assumed as the flag to tell the combined bearing capability of lining and surrounding rock. Then the influence of rock permeability and deformation modulus on the combined bearing characteristic of lining and surrounding rock is discussed. The design method and process are described in detail. According to the limit of maximum width of concrete crack, a program to calculate pervious lining stresses and to carry out the reinforcing bars design is developed and compiled. A certain tunnel is analyzed as an example and a certification of design program is provided. Finally some conclusions are drawn as follows. Rock permeability is as important as deformation modulus in tunnel lining structure design. The possibility of lining deviating from rock becomes larger when rock permeability becomes poorer and deformation modulus softer. And the possibility of lining deviating from rock also becomes larger when the concrete cracked. A great amount of steel can be saved through the reinforced concrete lining scheme than the steel lining one. To enhance rock integrity and impermeability, some advices are suggested, such as reducing excavation disturbance, adopting fine and complete consolidation grouting.

Key words: hydraulic tunnel, internal water pressure, combined bearing

中图分类号:

TV 672.1

苏凯，伍鹤皋，周创兵. 内水压力下水工隧洞衬砌与围岩承载特性研究[J]. , 2010, 31(8): 2407-2412.

SU Kai, WU He-gao, ZHOU Chuang-bing. Study of combined bearing characteristics of lining and surrounding rock for hydraulic tunnel under internal water pressure[J]. , 2010, 31(8): 2407-2412.

参考文献

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

本文评价

推荐阅读 10

[1]	魏丽，柴寿喜，蔡宏洲，王晓燕，李敏，石茜. 麦秸秆加筋材料抗拉性能的实验研究[J]. , 2010, 31(1): 128 -132 .
[2]	孙德安，陈波. 重塑超固结上海软土力学特性及弹塑性模拟[J]. , 2010, 31(6): 1739 -1743 .
[3]	荆志东，刘俊新. 红层泥岩半刚性基床结构动态变形试验研究[J]. , 2010, 31(7): 2116 -2121 .
[4]	刘争宏，廖燕宏，张玉守. 罗安达砂物理力学性质初探[J]. , 2010, 31(S1): 121 -126 .
[5]	雷金波，陈从新. 基于双曲线模型的带帽刚性桩复合地基荷载传递机制研究[J]. , 2010, 31(11): 3385 -3391 .
[6]	王登科，刘建，尹光志，韦立德. 突出危险煤渗透性变化的影响因素探讨[J]. , 2010, 31(11): 3469 -3474 .
[7]	王军，曹平，李江腾，刘业科. 降雨入渗对流变介质隧道边坡稳定性的分析[J]. , 2009, 30(7): 2158 -2162 .
[8]	张渊，万志军，康建荣3，赵阳升. 温度、三轴应力条件下砂岩渗透率阶段特征分析[J]. , 2011, 32(3): 677 -683 .
[9]	张雪婵，龚晓南，尹序源，赵玉勃. 杭州庆春路过江隧道江南工作井监测分析[J]. , 2011, 32(S1): 488 -0494 .
[10]	唐世斌，唐春安，李连崇，张永彬. 湿度扩散诱发的隧洞时效变形数值模拟研究[J]. , 2011, 32(S1): 697 -0703 .