软土地基论文珠江三角洲公路软土地基加固处理案例分析研究.doc

软土地基论文：珠江三角洲公路软土地基加固处理案例分析研究【中文摘要】广东省是我国经济最为发达的地区之一,近年来广东省不断加大交通基础设施建设的投资力度,尤其是高速公路建设投资。广东省沿海经济发达地区,除个别地段外,大多处于平原水网地带,地下水位高,表层地质层次沉积年代早,结构松软,含水量高,变形大,多为软土地基,这决定了广东省修筑高速公路的特点,即需要处理的软基路段多。在软土地区修筑高速公路,路堤地基存在稳定性差和沉降过大等问题,影响工程质量和道路正常使用,常常造成重大的经济损失。本文以珠江三角洲公路软基设计常用处理方法的稳定与沉降为研究对象,在对软土的物理、力学性质参数应用的基础上,采用理论分析及工程实践,对不同软土地基处理方法的稳定与沉降计算方法的选取及它们的变化规律进行了研究,主要得出以下结论和研究成果。(1)在总结现有的常用软土勘察技术手段的优缺点的基础上,详细阐述了软土物理、力学性质参数在软土地基处理方法以及相应的稳定与沉降计算方法中的配套使用关系,并指出在应用中需要注意到的问题。(2)对现有常用的软土地基稳定计算与沉降计算方法进行评价。详细归纳了常用软土地基稳定与沉降计算方法的优缺点和适用范围,同时指出不同地基处理方法所采用的稳定与沉降控制指标的差异性,进而计算方法的选取也不尽相同。重点介绍了桩体复合地基的稳定和沉降计算方法以及工后沉降预测方法,同时将工后沉降预测方法的评价应用到实际工程中去。(3)通过珠江三角洲公路工程的三个工程的设计、施工经验,加固效果及检测情况,最后总结不同软土地基处理方法的优缺点、适用性。【英文摘要】Guangdong is one of the most economically developed areas in China. Guangdong Province has increased transportation infrastructure investment in recent years, especially in in highway construction investment. Economically developed coastal regions in Guangdong Province,most are in the water network of plain area,with high water table and early geological age of the surface sediment layers,except individual regions. Most of these regions have soft ground structure,high water content, it determines the characteristics of construction of highway in Guangdong Province, which need to be addressed more soft ground section. Highway construction in soft soil, there are poor stability and excessive settlement issues,which affect the quality of project and the normal use of road,which often cause significant economic losses.The paper, takes the Pearl River Delta Road commonly used soft foundation treatment design of the stability and the settlement as the object of study,basing on the soft soil,of the physical parameters of mechanical properties of applications,and use theoretical analysis and engineering practice,and study on the different treatment methods for soft soil foundation stability and settlement calculation method,We draw the following conclusions and results:(1) Based on summarizing the advantages and disadvantages of the existing common soft soil survey technology ,we elaborated the physical, mechanical parameters of soft soil in soft soil foundation treatment method and the corresponding stability and the settlement calculation method of supporting the use of relations,and pointed out the problems needed to pay attention in the application.(2) We have evaluated on the existing common soft foundation settlement calculation method of stability calculation,and detailed summarized the advantages , disadvantages,and of scope of application ofcommonly used soft soil foundation stability and settlement calculation methods,and pointed out the difference of different foundation treatments which was used stability and settlement control index. Then the selection of computational method are not the same. The text mainly introduces the pile composite foundation stability and settlement calculation method and the method of settlement prediction,and applies the post-construction settlement prediction method of evaluation to practical engineerings.(3)Through the three engineeringsconstruction design, construction experience, the reinforcement effect and detection in Pearl River Delta Road ,finally we summarize the different soft foundation treatment methods advantages and disadvantages, applicability.【关键词】软土地基 地基加固 珠江三角洲 稳定与沉降【英文关键词】Soft Foundation Consolidating ground the Pearl-River Delta Stability and Subsidence【目录】珠江三角洲公路软土地基加固处理案例分析研究摘要5-6ABSTRACT6-7第一章 绪论10-171.1 论文研究目的和意义101.2 论文研究现状10-161.2.1 软土工程性质10-111.2.2 公路软土地基处理方法11-151.2.3 软土地基稳定与沉降计算理论15-161.3 本论文研究思路与主要内容16-17第二章 软土加固处理设计参数运用17-222.1 软土地基勘察技术与手段17-182.2 软土参数的应用18-212.2.1 工程试验参数与处理方法的关系18-202.2.2 参数与稳定沉降计算的关系20-212.3 小结21-22第三章 软土地基加固设计中沉降与稳定性计算分析方法22-423.1 软土地基沉降计算方法22-333.1.1 最终沉降量的计算22-303.1.3 沉降预测方法30-333.2 软土地基稳定性计算方法评价33-423.2.1 规范法33-363.2.2 桩体复合地基承载力36-42第四章 珠江三角洲公路工程软土地基加固处理工程实例分析42-674.1 工程实例一佛山市顺德区快速干线网二期工程42-544.1.1 工程概况424.1.2 工程地质条件42-454.1.3 软土地基加固处理设计45-504.1.4 加固效果及现场监测50-534.1.5 小结53-544.2 工程实例二东莞生态园区道路54-584.2.1 工程概况544.2.2 工程地质条件54-564.2.3 软基设计56-584.2.4 加固效果及工程检测情况584.2.5 小结584.