【作者】 张军良；

【导师】 王成华；

【作者基本信息】 天津大学 ， 结构工程， 2006， 硕士

【摘要】 振动沉模防渗板墙技术是一种新型的堤坝加固技术,目前对其理论研究还不全面。本文首次对振动沉模防渗板墙加固堤坝的效果进行了数值分析。本文目的是让工程设计人员对防渗板墙的受力和变形情况有清晰的认识,了解防渗板墙在堤坝加固工程中发挥地作用。主要研究内容如下:(1)坝体的初始应力位移场是有限元计算的初始状态,因此应比较逼真地模拟出初始应力位移场。坝体的施工是分级填筑的,因此本文通过模拟坝体这一施工过程得到了坝体的初始应力位移分布。(2)通过模拟防渗板墙施工过程得到了防渗板墙周围土体的应力位移分布。由于防渗板墙的挤压作用,引起了防渗板墙周围土体的应力位移重分布。(3)水库蓄水后坝体的应力位移在水压力作用下产生了变化,本文通过在防渗板墙左右两侧施加水压力计算得出了蓄水后坝体和防渗板墙的应力位移状态。(4)进行参数分析,讨论了防渗板墙厚度对坝体和防渗板墙位移应力的影响。更多还原

【Abstract】 Anti-seepage slab-wall of sink by vibration technology is a new technology of reinforcing dam; at present, theoretical research on it is not deeply and comprehensively made. This thesis firstly made numerical analysis on the effect of reinforcing dam with anti-seepage slab-wall of sinking model by vibrating. The main purpose of this thesis is to help engineering designers get good comprehension about the internal force and displacement of the anti-seepage slab-wall. Main content of the thesis is as follows:Research on theories concerning the new technology has not been carried out fully because it is a new technology. Most engineering designers are not clear about the internal force and displacement of anti-seepage slab-wall, and therefore can not learn the effect of anti-seepage slab-wall in projects of reinforcing dam.(1) The initial stress and displacement field of the dam is the initial status calculated with FEM, so the initial stress and displacement field can be simulated accurately. Because the construction of the dam is carried out by stuffing soil step by step; as a result, the initial stress and displacement field of the dam has been obtained through simulating this construction process.(2) The stress and displacement field of the soil around the anti-seepage slab-wall has been got by simulating the construction process of the anti-seepage slab-wall. The squeezing effect of anti-seepage slab-wall has caused the redistribution of the stress and displacement of the soil around the wall.(3) The stress and displacement of the dam has changed with the effect of water pressure after water is stored. The stress and displacement status of the dam and anti-seepage slab-wall has been calculated out through putting water pressure onto the left and right side of the anti-seepage slab-wall.(4) The analysis of the parameters has been made, and especially the effect which thickness of the anti-seepage slab-wall has on the stress and displacement of the dam and anti-seepage slab-wall is discussed in this thesis.更多还原