成都市金牛区某建筑场地基坑支护及降水设计-本科毕业论文.doc

成都市金牛区某建筑场地基坑支护 及降水设计 作者姓名： 古滔 学 号： 201103010112 专 业： 土木工程（岩土工程方向） 指导教师： 郑达 摘要 本论文对成都成都市金牛区某建筑场地基坑支护及降水进行设计。本基坑开挖深度为15米，地下水埋深为-9.4m左右，对本场地基坑开挖时需要进行降水处理。本工程进行基坑支护的设计时，在考虑安全的前提下，结合技术和工程经济，采用锚拉式排桩支护。利用朗肯土压力理论进行主被动土压力的计算，运用blum法进行内力计算。分析桩身受力，分段求出桩身的最大弯矩值，由最大弯矩进行桩身的配筋计算。支护结构设计计算完成后，对基坑整体稳定性、桩身的抗倾覆及基坑底的抗隆起稳定性进行了验算，结果显示均满足要求。根据渗透系数确定基坑采用管井井点进行降水设计，在降水的设计上对本基坑的降水做了定量的设计计算。并对设计结果进行验算。 【关键词】深基坑；基坑支护；降水；锚拉桩； Support for building foundation pit in Jinniu District, Chengdu Name： GuTao Student No.： 201103010112 Major： Civil Engineering(Geotechnical Engineering) Supervisor： ZhengDa Abstract This paper designs the foundation pit support and precipitation of a building building in Chengdu, Jinniu District, Chengdu.. The base pit excavation depth of 15 meters, the groundwater depth is about -9.4m, the site of the excavation to precipitation treatment. In the design of foundation pit support, the combination of technology and engineering economy, with the anchor pull type pile supporting, is considered when considering the premise of safety.. Calculation of passive earth pressure using the Rankine soil pressure theory, using the equivalent beam method to calculate internal force. By force analysis of pile, the maximum bending moment of pile section calculated by the value of the maximum bending moment of pile reinforcement calculation. After the calculation of the supporting structure design, the stability of the foundation pit, the anti overturning of piles and the stability of the foundation pit bottom were checked. The results showed that the foundation pit was satisfied.. According to the permeability coefficient of excavation can be obtained by tube well point dewatering design in dewatering design based on Dupuit well flow equation of the foundation pit precipitation do the quantitative design and calculation. And the design result is checked. Developed a scientific and strict monitoring program, the construction process is strictly monitored. Key words: D