摘 要

如今的21世纪，人口越来越多，交通资源压力越来越大，人类必须要发展地下空间来满足日益增长的交通需求。随着地下空间的开发和利用，人类越来越多地开挖超大深基坑，但是基坑开挖可能对临近建筑物产生不利的影响。

基坑工程并不是一个孤立的个体，基坑及其支撑体系与周围的自然环境紧密相关，基坑开挖时会对邻近建筑桩基础产生不利的影响。因为基坑开挖会引起基坑附近土体的位移，这必然会使邻近的建筑物桩基产生水平位移、附加应力和弯矩，最后直接导致土体产生变形。

基坑开挖后，破坏了原有的土体平衡，使得两侧土体有向基坑垮塌的倾向，这显然是非常危险的。我们考虑基坑工程不能把它作为一个单独的个体，基坑工程是建设中最为重要的一环之一，基坑工程与周围建筑物、自然环境关具有紧密的关联。

关键词：基坑及其支撑体系；基坑开挖；桩基础；影响

Analysis of influence of foundation pit and its support on pile foundation of high rise building

ABSTRACT

In twenty-first Century,the population is increasing, and the transportation resources are becoming more and more pressure .Human beings have to develop underground space to meet the increasing traffic demand. With the development and utilization of underground space, more and more large and deep foundation pits are excavated.Excavation may have adverse effects on adjacent buildings.

The foundation pit engineering is not an isolated solid, and the foundation pit and its supporting system are closely related to the surrounding environment. The excavation of foundation pit will cause the lateral displacement of the soil, which will result in the additional stress, bending moment and stress of the adjacent pile foundation.

After the excavation of the foundation pit, the original soil mass balance is destroyed, which makes the two sides of the soil have a tendency to collapse to the foundation pit, which is obviously very dangerous. The foundation pit engineering is not an isolated solid, as an indispensable part of the construction, the foundation pit engineering is closely related with the surrounding environment.

Key words: Foundation pit and its supporting system; Foundation excavation; pile foundation; Influence

目录

1国内外研究况..........................................................................1

1.1研究背景及意义...................................................................1

1.2深基坑开挖造成的影响.............................................................1

1.2.1深基坑的概念................................................................1

1.2.2深基坑的特点................................................................2

1.2.3深基坑开挖对邻近建筑的影响..................................................2

1.3隧道施工对桩基础影响研究.........................................................5

1.3.1隧道施工的发展背景..........................................................5

1.3.2城市隧道施工对桩基的影响....................................................5

1.3.3双圆盾构施工引起桩基附加荷载分析............................................6

1.4基坑性状分析.....................................................................7

1.4.1基坑性状分析的背景..........................................................7

1.4.2基坑性状研究内容............................................................8

1.4.3基坑工程的三维性状分析......................................................9

1.5基坑支护开挖.....................................................................9

1.5.1基坑支护开挖的要求..........................................................9

1.5.2基坑开挖模拟的方法.........................................................10

1.5.3基坑支护开挖的影响研究与分析...............................................10

1.6基坑开挖引起的建筑物不均匀震陷..................................................11

1.6.1震陷的概念.................................................................11

1.6.2基坑造成的震陷实例.........................................................11

1.6.3基坑造成的不均匀震陷的研究意义.............................................11

1.6.4对于深基坑开挖造成震陷研究的讨论和归纳分析.................................12

1.6.5深基坑开挖引起的土体破坏与沉降.............................................12

1.7文献要点点评....................................................................13

1.8目前研究中存在的问题............................................................13

1.9文献综述与所研究课题关系........................................................14

2Plaxis软件...........................................................................16

2.1引言............................................................................16

2.2关于Plaxis......................................................................16

2.2.1Plaxis软件介绍.............................................................16

2.2.2Plaxis基本功能.............................................................18

2.2.3Plaxis软件特点.............................................................19

2.3Plaxis的应用实例.............................................................19