锚索抗滑桩的离心振动台模型试验设计

发布时间：2018-10-23 07:20

【摘要】：锚索抗滑桩作为近年来广泛应用的一种新型支护结构，已成为大中型滑坡治理的主要手段之一。汶川地震震害调查表明，目前我国锚索抗滑桩的抗震设计趋于保守。研究锚索抗滑桩的地震响应规律，揭示其抗震设计的保守程度，具有重要的理论价值和工程意义。本文以四川省汉源县背后山锚索抗滑桩工程为原型，设计了锚索抗滑桩的离心振动台模型试验方案，主要研究工作如下： 1．系统综述了锚索抗滑桩加固的理论分析、数值模拟和模型试验的国内外研究现状，重点评述了有关抗滑桩加固边坡的离心模型试验研究成果，指出了其所存在的不足。 2．以汉源背后山的锚索抗滑桩工程为原型，设计了低水位条件下无加固滑坡，高、低水位条件下单根和排式锚索抗滑桩加固滑坡，共五组动力离心模型试验。详细研究、制定了包括试验设备选取、试验总体方案设计、模型试验相似关系推导、模型材料研制、模型滑坡制作、观测传感器布置和试验加载程序设计等试验关键环节的技术方案。 3．采用四因素、三水平正交试验方法，研究了水灰比、骨灰比、砂率和减水剂用量四种试验因素对微粒混凝土抗压强度和弹性模量的影响，确定了试验用微粒混凝土的配合比，回归了四种试验因素与强度和弹性模量的统计公式。 4．基于试验设计方案，研究了离心试验模型制作流程，对试验模型制备步骤制定了严格的、可量化的操作标准。 5．利用MIDAS/GTS有限元分析软件，数值模拟、分析了地震作用下模型边坡锚索抗滑桩的受力规律，验证了模型试验设计方案的合理性。
[Abstract]:As a new type of supporting structure widely used in recent years, anchor cable anti-slide pile has become one of the main methods for the treatment of large and medium-sized landslides. The earthquake damage investigation in Wenchuan shows that the seismic design of Anchorage pile tends to be conservative. It is of great theoretical value and engineering significance to study the seismic response law of anchor cable anti-slide pile and reveal the conservative degree of its seismic design. In this paper, based on the Anchorage pile project of Yushan Anchorage cable in Hanyuan County, Sichuan Province, the centrifugal shaking table model test scheme of Anchorage cable anti-slide pile is designed. The main research work is as follows: 1. The theoretical analysis, numerical simulation and model test of anchor cable anti-slide pile reinforcement are systematically reviewed. The results of centrifuge model test on slope reinforcement with anti-slide piles are reviewed, and its shortcomings are pointed out. 2. Based on the Anchorage cable anti-slide pile engineering in the mountain behind Hanyuan, the landslide without reinforcement under low water level is designed. Five groups of dynamic centrifuge model tests were carried out to reinforce the landslide under high and low water level condition with order root and row anchor cable anti-slide pile. Including the selection of test equipment, the design of the overall test scheme, the derivation of the similarity relation of the model test, the development of the model material, the manufacture of the model landslide, The technical scheme of the key links of the experiment, such as the arrangement of the observation sensor and the design of the test loading program. 3. The water cement ratio, the bone cement ratio, the water cement ratio and the bone cement ratio are studied by using the four factors and three levels orthogonal test method. The influence of sand ratio and water reducer dosage on the compressive strength and elastic modulus of particulate concrete is determined. Regression of four test factors and statistical formulas of strength and modulus of elasticity. 4. Based on the experimental design, the process of making centrifugal test model is studied, and the procedure of preparing test model is strictly established. 5. By using MIDAS/GTS finite element analysis software and numerical simulation, the force law of model slope anchor cable anti-slide pile under earthquake action is analyzed, and the rationality of model test design scheme is verified.
【学位授予单位】：中国地震局工程力学研究所
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU473.1

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