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A laboratory and field-monitoring experiment on the ability of anti-slide piles to prevent buckling failures in bedding slopes
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2021-01-11 , DOI: 10.1007/s12665-020-09288-6
Qian Zhang , Jie Hu , Yanliang Du , Yang Gao , Jianzhi Li

Buckling failure is a special form of a landslide, and it has been little debated in the literature so far. There have been few studies conducted on this type of slope failure, and the corresponding reinforcement measure research has also been rarely conducted. Therefore, it is nearly impossible to provide systematic guidance for the reinforcement and monitoring of such a slope. In this study, a new type of slope test system is developed, and the reinforcement effect of double-row piles was studied using simplified laboratory tests. Under the conditions of no pile and piles, load tests on the sliding body were carried out, and the ultimate loads that can be borne by the slope sliding body under these two conditions were analyzed. The multivariate information evolution of stress, displacement, and pile deformation under these two conditions were studied using multiple monitoring methods. The results showed that anti-slide piles can significantly improve the ability of the sliding body to withstand external loads. For the condition of no piles, 4 kN/m (20.55 kPa) was the critical value and the critical load the slope could bear reached 10 kN/m (51.38 kPa) after the installation of piles. The first row of piles withstood more load than the second row of piles, and double-row pile reinforcement can effectively improve the anti-slip safety reserve. In addition, monitoring of the deformation of the slope and anti-sliding piles should focus on the position of the sliding body and the slip face. Based on the results of laboratory tests, on-site field monitoring was then conducted on the target slope, including displacement monitoring at different positions on the slope before and after anti-slide pile construction, deformation monitoring of anti-slide piles, and rock stress monitoring around anti-slide piles. Monitoring results showed that the slope deformation and rock mass stress tended to be stable after anti-sliding pile construction, and the anti-slide piles were conducive to a safe state. The results of this study provide a useful reference for the reinforcement and monitoring of buckling failure in an actual slope.



中文翻译:

进行抗滑桩防止层理边坡屈曲破坏的能力的实验室和现场监测实验

屈曲破坏是滑坡的一种特殊形式,迄今为止,在文献中很少有人争论。关于这种类型的边坡破坏的研究很少,相应的加固措施研究也很少。因此,几乎不可能为这种斜坡的加固和监测提供系统的指导。在这项研究中,开发了一种新型的边坡测试系统,并使用简化的实验室测试研究了双排桩的加固效果。在无桩和无桩的条件下,对滑动体进行了载荷试验,分析了这两种条件下边坡滑动体可以承受的极限载荷。应力,位移,使用多种监测方法研究了这两种情况下的桩变形。结果表明,抗滑桩可以显着提高滑动体承受外部载荷的能力。在无桩的情况下,临界值为4 kN / m(20.55 kPa),安装桩后,斜坡可以承受的临界载荷达到10 kN / m(51.38 kPa)。第一排桩比第二排桩承受更大的载荷,双排桩加固可以有效提高防滑安全储备。此外,对斜坡和抗滑桩的变形的监测应集中在滑动体和滑动面的位置。根据实验室测试的结果,然后对目标坡度进行现场监测,包括抗滑桩施工前后斜坡上不同位置的位移监测,抗滑桩的变形监测以及抗滑桩周围的岩石应力监测。监测结果表明,抗滑桩施工后,边坡变形和岩体应力趋于稳定,抗滑桩有利于达到安全状态。研究结果为实际边坡的屈曲破坏的加固和监测提供了有益的参考。抗滑桩有利于安全状态。研究结果为实际边坡的屈曲破坏的加固和监测提供了有益的参考。抗滑桩有利于安全状态。研究结果为实际边坡的屈曲破坏的加固和监测提供了有益的参考。

更新日期:2021-01-11
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