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大型岩堆边坡由于岩土体结构特殊性导致工程地质条件复杂且治理难度大,通常采用抗滑桩进行加固。但边坡在雨季期间受地表水、地下水对岩堆体弱化作用和施工持续扰动的过程中极易发生地表和深部岩土的变形,设计考虑的最不利滑动面之下极可能受到各种扰动后形成更深的滑坡面,往往导致地表变形范围变大和深部扰动更明显,导致抗滑支挡结构开裂甚至失效等。通过典型岩堆边坡开展全过程的地表、深部岩土位移和全分布式光纤传感测试抗滑桩内力的监测成果分析表明:该大型岩堆边坡在原设计的施工过程中,地表变形范围、深部岩土变形均大大超出原设计加固范围和深度,导致原抗滑桩刚性转动,变形不收敛。根据监测进行了动态设计和信息法施工,采用清方减载和增加一排抗滑桩后,监测表明边坡变形收敛。
Large-scale rock pile slope due to the particularity of rock and soil structure led to complex engineering geological conditions and difficult to manage, usually anti-slide pile reinforcement. However, during the rainy season, the slope is susceptible to various disturbances under the most unfavorable sliding surface under consideration due to the weakening effect of rock mass and ground water on the rock mass and the continuous disturbance of the construction during the rainy season After the formation of a deeper landslide surface, often lead to greater deformation of the surface deformation and deep disturbance is more obvious, resulting in anti-skid support structure cracking or failure. Through the typical rock pile slope to carry out the whole process of surface, deep geotechnical displacement and fully distributed optical fiber sensing test anti-slide pile internal force monitoring results show that: the large rock slope in the original design of the construction process, the surface deformation range , The deep geotechnical deformation greatly exceeded the original design reinforcement range and depth, resulting in rigid rotation of the original anti-slide piles, deformation does not converge. According to the monitoring, the dynamic design and construction of information method were carried out. After Qing dynasty load shedding and adding a row of anti-slide piles, monitoring showed that the deformation of the slope was convergent.