道路工程深大泥浆坑处理设计

论文总字数：29185字

摘 要

随着中国城市化进程的加快，中国各个城市的扩张在所难免，原先在城市周边的环境复杂，开发难度大的地块也纳入了开发计划之中。首当其冲的便是公路工程：为了满足城市间，城市内部的交通需要，公路的选线将会穿过这些复杂地形。另一方面，由于自然形成的原因或是人工开发的原因在一些城市周边存在着许多深大坑洞，这些坑洞种类繁多，形状各异，处理时所需要考虑的因素十分复杂，需要的施工条件较为苛刻。根据现有的各类地基的处理方案，这些坑洞的处理方法也多种多样，且由于坑洞的复杂性及大多数技术的有限性，很多处理方案都在面对这些问题时存在着短板。

在这一背景下，本文将先对坑洞的处理问题进行一个粗略的分析。接着，将罗列一些现今已经成熟，或者正在发展的技术，并分析这些技术对于坑洞问题的适用性。最后将引进一个工程案例，在此案例中，通过三类方法：换填法，预压法，搅拌桩的比较，最终选择水泥搅拌桩结合换填的方法对此坑洞进行处理。

关键词：城市；公路工程；深大坑洞；处理方案。

ABSTRACT

As the acceleration of urbanization in China, it is getting more necessary for most of the cities to expand their area, which means that they have to develop those lands that are difficult to develop in suburban areas. To fulfill the requirements of citizens of transportation between cities or in the city, the construction of highways in those areas become the primary task in urbanization. On the other hand, there are many deep and large pit in those areas. They are either formed by nature or the side-effect of human construction. There are so many kinds of pit existing and so many factors should be taken into consideration when constructing that they are very implicated to tackle with. According to the existing methods to treat basement in engineering, there are plenty of methods to treat those pits. However, limited by the technologies, they are imperfect in dealing with these problems.

Considering those facts, this article is going to simply analyze this troublesome problem, then list the existing methods to tackle with and demonstrate one real example.Through a detailed comparison among those methods, the mixed-in-place pile is recommended to execute in this construction.

Key Word: Urban; Highway Engineering; Pit; Treatment.

目 录

1. 概述……………………………………………………………………………………1

1.1引言…………………………………………………………………………………………1

1.2坑洞问题处理分析…………………………………………………………………………1

1.3坑洞地基处理概述…………………………………………………………………………2

1.4本文主要研究内容…………………………………………………………………………2

1. 处理方法的研究………………………………………………………………………4

2.1现有处理方法存在的问题…………………………………………………………………4

2.2现有的处理方法……………………………………………………………………………4

2.2.1无内容物……………………………………………………………………………4

2.2.2含水…………………………………………………………………………………4

2.2.3含泥…………………………………………………………………………………4

2.3需要考虑的工程因素………………………………………………………………………8

2.3.1坑洞构成……………………………………………………………………………8

2.3.2道路性质……………………………………………………………………………9

2.3.3施工条件……………………………………………………………………………9

1. 工程实例研究…………………………………………………………………………10
   3.1 概述………………………………………………………………………………………10

3.1.1设计依据……………………………………………………………………………10

3.1.2设计规范……………………………………………………………………………10

3.1.3设计标准……………………………………………………………………………10

3.2 场地工程地质条件………………………………………………………………………11
3.2.1工程概况……………………………………………………………………………11

3.2.2周边环境……………………………………………………………………………11

3.2.3工程地质条件………………………………………………………………………12

3.2.4工程地震分析………………………………………………………………………12

3.2.5水文地质条件………………………………………………………………………13

3.2.6小结…………………………………………………………………………………13

3.3地基处理方案比选…………………………………………………………………………14

3.3.1不良地质分析………………………………………………………………………14

3.3.2软弱地基处理原则…………………………………………………………………14

3.3.3方案比选……………………………………………………………………………15

3.4 搅拌桩试桩设计……………………………………………………………………………25

3.4.1试桩目的……………………………………………………………………………25

3.4.2试桩施工要求………………………………………………………………………25

3.4.3试桩施工质量控制…………………………………………………………………26

3.4.4试桩效果检验设计…………………………………………………………………27

3.5大面积施工设计……………………………………………………………………………28

3.5.1施工准备……………………………………………………………………………28

3.5.2施工工艺……………………………………………………………………………28

3.5.3施工控制……………………………………………………………………………28

第四章 总结……………………………………………………………………………………34

附录……………………………………………………………………………………………35

参考文献………………………………………………………………………………………47

致谢……………………………………………………………………………………………49

1. 绪论

1.1引言

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