锚索框架梁与微型桩技术在滑坡治理中的应用研究
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摘要
随着社会经济的发展,人类活动日益频繁,滑坡等自然灾害问题日益严重,经常中断交通、摧毁厂矿,给国民经济带来了巨大的损失,造成了实质性的事故。目前研究解决滑坡问题的方法很多,但不同的工程地质条件和不同的滑坡类型,所采用的滑坡治理手段有所不同。
本文根据工程地质勘查资料,确定了滑坡破坏边界范围等基本特征,运用传递系数法对滑坡稳定性进行分析计算,计算结果为：1-1′断面的稳定系数为0.940,剩余推力为1744.783 kN／m；3-3′断面的稳定系数为0.993,剩余推力为2091.959 kN／m；4-4′断面的稳定系数为1.063,剩余推力为1326.719 kN／m；5-5′断面的稳定系数为1.111,剩余推力为856.218 kN／m(滑坡设计安全系数为1.25)。从稳定系数可以看出两个坡体在暴雨工况下,由于连续贯通的地下水的影响,均处于不稳定～基本稳定状态,其安全储备严重不足,需要进行治理。
并以稳定性计算结果为依据提出了两种滑坡治理的设计方案,通过对设计方案进行的比选和优化,确定了主要以锚索框架梁和微型桩为治理技术手段：1#滑坡前缘采用微型桩+锚拉框架梁,后缘采用旋喷桩+微型桩；2#滑坡先进行刷方卸载,然后坡面布置锚拉框架梁,刷坡平台布置微型桩。
治理效果监测表明,锚索框架梁和微型桩技术综合治理该黄土质滑坡效果明显,达到了根治滑坡的预期目的,为类似的滑坡治理工程提供了参考。
As social and economic development, human activities are increasingly frequent natural disasters are increasingly serious problem of landslide interrupted traffic and often destroyed the factory to the national economy has brought huge losses resulted in substantial accident.Present research landslide problem is solved, but different engineerng geology and different types of landslides, the slide rule by means of different.
The paper according to the project profile and landslides destruction of the border waiting for, select the delivery of basic characteristics of landslides stability analysis and calculation for:stability coefficient of the one section is 0.940, esidual downslide thrust is 1744.783 kN/m; stability coefficient of the three section is 0.993, esidual downslide thrust is 2091.959 kN/m; stability coefficient of the four section is 1.063, esidual downslide thrust is 1326.719 kN/m; stability coefficient of the five section is 1.111, esidual downslide thrust is 856.218 kN/m(Slide the design of safety is 1.25). That two grades in the conditions of underground water running through the influence of instability to in stable condition and the serious shortage of the reserves, the need for governing.
And stability in the calculation is based on the two landslides governance design. Through the plans for more than to choose and optimized, is determined mainly anchor frame beam and the micropile for the technical means. Leading edge of number one slope adopt micropile and anchor frame beam, back edge of slope adopt churning pile and micropile. Number two slope lighten weight by moving away rocks first,then lay out anchor cable with frame beam at slope surface and lay out micropile on platform of slop.
The effectiveness of monitoring shows that anchor frame beam and the technique adopted comprehensive measures to the loess slope effect,Achieve the purpose of the expected landslide cure, the slide rule for the project provides reference. For similar landslides governance project provides reference
本文根据工程地质勘查资料,确定了滑坡破坏边界范围等基本特征,运用传递系数法对滑坡稳定性进行分析计算,计算结果为：1-1′断面的稳定系数为0.940,剩余推力为1744.783 kN／m；3-3′断面的稳定系数为0.993,剩余推力为2091.959 kN／m；4-4′断面的稳定系数为1.063,剩余推力为1326.719 kN／m；5-5′断面的稳定系数为1.111,剩余推力为856.218 kN／m(滑坡设计安全系数为1.25)。从稳定系数可以看出两个坡体在暴雨工况下,由于连续贯通的地下水的影响,均处于不稳定～基本稳定状态,其安全储备严重不足,需要进行治理。
并以稳定性计算结果为依据提出了两种滑坡治理的设计方案,通过对设计方案进行的比选和优化,确定了主要以锚索框架梁和微型桩为治理技术手段：1#滑坡前缘采用微型桩+锚拉框架梁,后缘采用旋喷桩+微型桩；2#滑坡先进行刷方卸载,然后坡面布置锚拉框架梁,刷坡平台布置微型桩。
治理效果监测表明,锚索框架梁和微型桩技术综合治理该黄土质滑坡效果明显,达到了根治滑坡的预期目的,为类似的滑坡治理工程提供了参考。
As social and economic development, human activities are increasingly frequent natural disasters are increasingly serious problem of landslide interrupted traffic and often destroyed the factory to the national economy has brought huge losses resulted in substantial accident.Present research landslide problem is solved, but different engineerng geology and different types of landslides, the slide rule by means of different.
The paper according to the project profile and landslides destruction of the border waiting for, select the delivery of basic characteristics of landslides stability analysis and calculation for:stability coefficient of the one section is 0.940, esidual downslide thrust is 1744.783 kN/m; stability coefficient of the three section is 0.993, esidual downslide thrust is 2091.959 kN/m; stability coefficient of the four section is 1.063, esidual downslide thrust is 1326.719 kN/m; stability coefficient of the five section is 1.111, esidual downslide thrust is 856.218 kN/m(Slide the design of safety is 1.25). That two grades in the conditions of underground water running through the influence of instability to in stable condition and the serious shortage of the reserves, the need for governing.
And stability in the calculation is based on the two landslides governance design. Through the plans for more than to choose and optimized, is determined mainly anchor frame beam and the micropile for the technical means. Leading edge of number one slope adopt micropile and anchor frame beam, back edge of slope adopt churning pile and micropile. Number two slope lighten weight by moving away rocks first,then lay out anchor cable with frame beam at slope surface and lay out micropile on platform of slop.
The effectiveness of monitoring shows that anchor frame beam and the technique adopted comprehensive measures to the loess slope effect,Achieve the purpose of the expected landslide cure, the slide rule for the project provides reference. For similar landslides governance project provides reference
引文
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