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高压涌水
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    Based on the model of structure and surrounding rock mass co-deformation,the reasonable optimum supporting structure parameters are determined for Yuanliangshan railway tunnel.
    采用围岩与结构共同变形的计算模式,优选出圆梁山隧道在高压涌水条件下的合理支护结构形式。
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In the process of construction of deep lying tunnel, some special geological hazards, such as high geotemperature, high geostress and rock burst, water gushing with high pressure, will be met because of the great depth and the complicated geological background. Based on researches of tens of deep lying tunnels at home and abroad, the formation conditions and influencing factors of the hazards are analyzed from some respects.

深埋隧道工程由于埋深大、洞程长、地质条件复杂,在修筑过程中,将会发生一系列特殊的灾害地质问题。如:高压涌水、高地应力及岩爆、高地温问题等。本文根据大量深埋隧道工程实例,分析了这些灾害地质问题发生条件和影响因素。

Geleshan Tunnel on Yuhuai Railway,located at the suburb of Chongqing is one of the eleven control projects with complicated hydrology and high requirements for water resource. The waterproof technology by full-face curtain grouting applied in the tunnel construction is in favor of protecting the ecology environment and reducing the future problems.

渝怀线歌乐山隧道是全线十一大控制工程之一 ,水文地质条件复杂 ,地处于重庆市郊 ,周围水资源环境要求高。通过采用有利于保护洞顶生态环境、减少后患的帷幕注浆堵水技术 ,成功地解决了高压涌水、涌泥等施工难题

Based on the model of structure and surrounding rock mass co-deformation,the reasonable optimum supporting structure parameters are determined for Yuanliangshan railway tunnel. Through stability analysis of bearing capacity of grouted region around the tunnel,the minimum size of reinforced region is proposed to be 3 m. On the basis of elasto-plastic FEM calculation for 38 cases,the relationship curves can be obtained of the size of grouting reinforced region versus the thickness of secondary lining with the...

Based on the model of structure and surrounding rock mass co-deformation,the reasonable optimum supporting structure parameters are determined for Yuanliangshan railway tunnel. Through stability analysis of bearing capacity of grouted region around the tunnel,the minimum size of reinforced region is proposed to be 3 m. On the basis of elasto-plastic FEM calculation for 38 cases,the relationship curves can be obtained of the size of grouting reinforced region versus the thickness of secondary lining with the secondary lining safety factor =K2.4. In addition,the results demonstrate that the higher level grouting can be used to reduce the supporting structure parameters.

采用围岩与结构共同变形的计算模式,优选出圆梁山隧道在高压涌水条件下的合理支护结构形式。通过对圆梁山隧道注浆加固圈单独承载稳定性分析,拟定出圆梁山隧道所需加固圈的最小尺寸为3m。通过对38种工况模型的弹塑性数值计算,找出了在满足相同结构安全度要求K=2.4条件下,随着注浆加固圈厚度增加,可相应减薄二次衬砌所需厚度的关系曲线。此外,研究结果还表明,提高注浆水平能较大程度地减弱支护结构参数。因此,改善注浆水平是有很大意义的。

 
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