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基坑开挖及护坡工程施工方案
摘 要
近年来，国内高层建筑迅速发展，高层建筑在各地拔地而起。对高层建筑而言，深基坑的开挖与支护有着重要的意义，他影响整个建筑物的稳定性和质量。基坑工程所在的大城市的地下土层一般分布复杂，经常地质软弱，地下水赋存形态及其运动形式复杂，分布变化大。而基坑的支护体系又是临时结构，在设计施工中常常有很大的节省造价和缩短工期的空间。因而基坑的开挖既具有很大的风险，也有很高的灵活性和创造性。基坑的开挖不但要确保基坑本身的土体和支护结构的稳定，另外还要确保周围建筑物，地下设施及管线，道路的安全和正常使用。
本文先介绍驻马店建业十八城23号楼地基的工程概况，包括水文地质和周围环境。然后通过结合对现有基坑开挖支护方法和23号楼的实际情况的比较，选择出适合的开挖及支护的方案。
关键词：高层建筑；深基坑；支护方案；水文地质
The Excavation of the Foundation Pit and the Construction Plan of Supporting Construction
ABSTRACT
In recent years, high-rise buildings have been developing rapidly in the country, and high-rise buildings have been built up everywhere. In the case of high-rise buildings, the excavation and support of deep foundation is of great significance, and he affects the stability and quality of the whole building. Foundation pit engineering in the big cities of underground complex general distribution, geological weak and often complex geometrical shape and movement patterns of groundwater, the distribution change is big. And the support system of the foundation pit is also the temporary structure, often in the design construction often very big save cost and shorten the space of the period. Thus the excavation of the foundation pit is both risky and highly flexible and creative. Foundation pit excavation is not only to ensure the stability of soil mass and the supporting structure of foundation pit itself, also ensure the surrounding buildings, underground facilities and pipeline, road safety and normal use.
This paper introduces the engineering overview of the foundation of building 18 city, no.23, which includes hydrogeology and surrounding environment. Then, the suitable excavation and supporting plan were selected by combining the excavation support method of the existing foundation pit and the actual situation of the 23rd floor.
Key words：High-rise buildings;Deep foundation pit;Support plan;hydrogeology | 
