湿陷性黄土地段高速公路地基施工质量控制技术研究
发布时间：2018-11-03 12:21
【摘要】：湿陷性黄土在我国疆土分布面积较广,尤其是在西北地区。湿陷性黄土的性质是受水浸湿后,强度会迅速降低,导致土体结构破坏,继而会发生较为显著的沉陷,所以其工程性质较差。在湿陷性黄土地段施工更需注其湿陷性的消除,保证施工质量及安全。采用什么地基处理技术也会对施工质量的控制产生很大的影响,进而对整个工程项目产生影响,若处理不当,将会引起地基的不均匀沉降、路面的破坏等等。所以,在湿陷性黄土的处理过程中,结合本项目的施工条件、施工环境等全方面考虑,选择合适的处理方法,在保证施工质量的同时注意保护环境,避免造成环境污染。在湿陷性黄土地段修建高速公路,要保证地基的安全及经济性,采用合理的地基处理施工技术以及施工过程中各个工艺流程的施工质量控制技术成为关键,具有很大研究价值。本文在介绍湿陷性黄土的性质及湿陷机理的基础上,提出针对湿陷性黄土地基沉陷问题的处理方法,包括换填垫层法、强夯法、灰土桩挤密法、振冲法等。通过对以上多种湿陷性黄土地基处理方法施工工艺、设计计算、使用范围等全面的介绍及其社会效益、经济效益以及环境效益的对比分析得出灰土桩挤密法以其以土治土的处理技术,可以在各种地基处理方法中显得比较经济,得到广泛的应用。所以,本文重点研究灰土挤密桩法在湿陷性黄土地基处理中的施工质量控制技术研究。具体包括整体角度研究灰土挤密桩施工质量的管控方法,包括PDCA循环法等;微观角度研究灰土挤密桩的施工工艺流程的施工质量控制技术操作要点、控制标准;之后对灰土挤密桩地基处理效果从检测内容及检验内容两方面作评价,灰土挤密桩施工过程中重要的控制参数有:桩体压实度、桩间土压实度、桩间土的湿陷系数、复合地基承载力。确保灰土挤密桩各项参数、施工质量、加固效果、复合地基达到消除湿陷性的标准。最后以“东毛高速公路A7合同段”为案例做具体分析,研究了该项目采用灰土挤密桩的施工工艺、施工过程中的相关试验、控制的指标参数、达到施工要求的评价等研究成果。
[Abstract]:Collapsible loess is widely distributed in China, especially in northwest China. The property of collapsible loess is that the strength of collapsible loess will decrease rapidly after being soaked in water, which will lead to the destruction of soil structure and the occurrence of obvious subsidence, so its engineering property is poor. In the construction of collapsible loess section, the elimination of collapsibility is necessary to ensure the construction quality and safety. The adoption of the foundation treatment technology will also have a great impact on the construction quality control, and then on the entire project, if not treated properly, will cause uneven settlement of the foundation, pavement damage and so on. Therefore, in the process of treatment of collapsible loess, considering the construction conditions, construction environment and other aspects of the project, the appropriate treatment method is selected to ensure the quality of construction at the same time to protect the environment and avoid environmental pollution. In order to ensure the safety and economy of the foundation in the collapsible loess section, it is of great research value to adopt the reasonable foundation treatment construction technology and the construction quality control technology of each technological process in the construction process. On the basis of introducing the nature and collapsibility mechanism of collapsible loess, this paper puts forward some methods to deal with the settlement of collapsible loess foundation, including replacement cushion method, dynamic compaction method, lime-soil pile compaction method, vibration-scouring method and so on. By introducing the construction technology, design and calculation, application scope and social benefit of the above kinds of collapsible loess foundation treatment methods, By comparing and analyzing the economic and environmental benefits, it is concluded that the compaction method of lime-soil pile, with its treatment technology of soil and soil, can be used widely and economically in all kinds of foundation treatment methods. Therefore, this paper focuses on the construction quality control technology of lime-soil compaction pile method in the treatment of collapsible loess foundation. It includes the overall research on the control methods of the construction quality of lime-soil compaction pile, including the PDCA cycle method, and the micro-angle research on the key points and control standards of the construction quality control technology of the construction process of the lime-soil compaction pile. After that, the treatment effect of lime-soil compaction pile foundation is evaluated from two aspects: test content and test content. The important control parameters in the construction of lime-soil compaction pile are: compaction degree of pile body, coefficient of soil collapsibility between piles, and so on. Bearing capacity of composite foundation. To ensure the parameters, construction quality, reinforcement effect and composite foundation reach the standard of eliminating collapsibility of lime-soil compaction pile. Finally, taking "A7 contract section of Dongmao Expressway" as a case study, the paper studies the construction technology of lime-soil compaction pile, the relevant tests during construction, the controlled index parameters and the evaluation to meet the construction requirements.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.16
本文编号：2307772
[Abstract]:Collapsible loess is widely distributed in China, especially in northwest China. The property of collapsible loess is that the strength of collapsible loess will decrease rapidly after being soaked in water, which will lead to the destruction of soil structure and the occurrence of obvious subsidence, so its engineering property is poor. In the construction of collapsible loess section, the elimination of collapsibility is necessary to ensure the construction quality and safety. The adoption of the foundation treatment technology will also have a great impact on the construction quality control, and then on the entire project, if not treated properly, will cause uneven settlement of the foundation, pavement damage and so on. Therefore, in the process of treatment of collapsible loess, considering the construction conditions, construction environment and other aspects of the project, the appropriate treatment method is selected to ensure the quality of construction at the same time to protect the environment and avoid environmental pollution. In order to ensure the safety and economy of the foundation in the collapsible loess section, it is of great research value to adopt the reasonable foundation treatment construction technology and the construction quality control technology of each technological process in the construction process. On the basis of introducing the nature and collapsibility mechanism of collapsible loess, this paper puts forward some methods to deal with the settlement of collapsible loess foundation, including replacement cushion method, dynamic compaction method, lime-soil pile compaction method, vibration-scouring method and so on. By introducing the construction technology, design and calculation, application scope and social benefit of the above kinds of collapsible loess foundation treatment methods, By comparing and analyzing the economic and environmental benefits, it is concluded that the compaction method of lime-soil pile, with its treatment technology of soil and soil, can be used widely and economically in all kinds of foundation treatment methods. Therefore, this paper focuses on the construction quality control technology of lime-soil compaction pile method in the treatment of collapsible loess foundation. It includes the overall research on the control methods of the construction quality of lime-soil compaction pile, including the PDCA cycle method, and the micro-angle research on the key points and control standards of the construction quality control technology of the construction process of the lime-soil compaction pile. After that, the treatment effect of lime-soil compaction pile foundation is evaluated from two aspects: test content and test content. The important control parameters in the construction of lime-soil compaction pile are: compaction degree of pile body, coefficient of soil collapsibility between piles, and so on. Bearing capacity of composite foundation. To ensure the parameters, construction quality, reinforcement effect and composite foundation reach the standard of eliminating collapsibility of lime-soil compaction pile. Finally, taking "A7 contract section of Dongmao Expressway" as a case study, the paper studies the construction technology of lime-soil compaction pile, the relevant tests during construction, the controlled index parameters and the evaluation to meet the construction requirements.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.16
【引证文献】
相关期刊论文 前1条
1 刘晓丹;;湿陷性黄土路基填筑施工方法[J];交通世界;2017年30期
，本文编号：2307772
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2307772.html
