爆炸挤淤堆石坝稳定性分析及计算软件开发

发布时间：2018-04-02 20:23

本文选题：控制加载爆炸挤淤置换法　切入点：稳定性　出处：《北京交通大学》2014年硕士论文

【摘要】：控制加载爆炸挤淤置换法(简称爆炸挤淤置换法)具有人力消耗少、施工简便、工期短、投资省等优点,被广泛应用于大型的港口工程建设和围垦工程中,但对其所筑堤坝的稳定性分析,还缺乏成熟的方法。因此及时开展爆炸挤淤置换法堆石坝地基变形和破坏机理的研究,建立能够有效分析堤坝稳定性的方法,具有重大的工程实用价值。本文遵循查阅相关文献—建立计算模型—开发分析软件—分析结果与常用分析方法对比的技术路线。主要工作和结论如下： (1)在大量文献调研的基础上,分析了爆炸挤淤置换法的成坝机理。该法不是改善和提高淤泥软基的自身承载力,而是通过堆石体的自重作用和爆炸冲击作用挤淤,实现泥石置换。堆石体既是堤身材料又是地基材料,提高了坝体的稳定性。 (2)以土体极限平衡理论为基础,从两个角度出发推导评估了专门针对爆炸挤淤堆石坝稳定性的计算公式。首次提出了适合于爆炸挤淤堆石坝的最危险滑面搜索方法以及重要参数滑面长度L和堆石滑体重度w的计算方法,建立了专门分析爆炸挤淤堆石坝的计算模型。 (3)梳理清各公式之间的逻辑关系,使用计算机语言Microsoft Visual C#,在Visual Studio编程开发平台上,结合Access数据库开发了爆炸挤淤堆石坝稳定性分析软件(Versionl.0),简称GRMCLB-ST (Ver.1.0)。 (4)利用自己开发的爆炸挤淤堆石坝稳定性分析软件(Version1.0)算得的安全系数比其它四种常用土体极限平衡理论算得的值更能反映堆石坝的实际状态,它在分析断面形状复杂、处于深厚淤泥中的爆炸挤淤堆石坝稳定性时更加具有优势。 (5)从爆炸挤淤堆石坝稳定性分析软件(Version1.0)和四种常用极限平衡理论算得的滑动面位置看,堆石坝发生破坏时,破坏面的终点一般在堆石坝底边上。 (6)考虑淤泥的粘聚力随深度增加时算得的安全系数比不考虑淤泥的粘聚力随深度增加时算得的值提高较多,验证了爆炸挤淤堆石坝利用了深层淤泥强度较高的特性。
[Abstract]:To control the loading of blasting replacement method (referred to as blasting replacement method) with human consumption, simple construction, short construction period, investment and other advantages, is widely used in large-scale port construction and reclamation project, but the analysis on the stability of the dam built by the lack of mature research methods. So timely to carry out the blasting replacement method of dam foundation deformation and failure mechanism, establish effective method of dam stability analysis, has great practical value.
In this paper, we consulted the relevant documents, set up the calculation model, develop the analysis software, analyze the results and compare with the commonly used analysis methods. The main work and conclusions are as follows:
(1) on the basis of literature research, analysis of the mechanism of dam blasting replacement method. The bearing capacity of the law is to improve and enhance the soft foundation, but by gravity and explosive compaction of rockfill compaction, realize debris replacement. Rockfill material is both dike the foundation material, improve the stability of the dam.
(2) in soil based on limit equilibrium theory, derived from the two aspects of evaluation formula for explosive compaction of rockfill dam stability is proposed for the first time. The most dangerous sliding surface suitable for explosive compaction of rockfill dam search method and important parameters of sliding surface length L and rockfill slip calculation method of severe W, set up a special analysis calculation model of explosive compaction of rockfill dam.
(3) combing the logical relationship between the formulas, using computer language Microsoft Visual C#, on the Visual Studio programming development platform, combined with Access database, we developed the explosive compaction rock fill dam stability analysis software (Versionl.0), referred to as GRMCLB-ST (Ver.1.0).
(4) the own development of the explosive compaction of rockfill dam stability analysis software (Version1.0) is the actual state of the safety coefficient can reflect the dam than the other four commonly used the limit equilibrium theory is more complex, it in the analysis section, in deep silt in explosive compaction of rockfill dam stability has more advantages.
(5) from the location of the sliding surface calculated by the Version1.0 software and the four commonly used limit equilibrium theories, when the rockfill dam is destroyed, the end of the failure surface is usually on the bottom edge of the rockfill dam.
(6) considering the cohesive force of silt as the depth increases, the safety factor calculated is much higher than that calculated without considering the cohesive force of silt with depth increasing. It is verified that the characteristics of deep silt with high strength are achieved by explosive compaction.

【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV641.4

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