盾构施工近接桩基的影响研究
发布时间：2018-12-29 18:40
【摘要】：现如今,随着经济发展城市化脚步不断加快,城区人口数量不断增加,城区交通承受能力越来越不足,城市交通拥挤问题急需缓解,因此,在我国很多大中城市都在修建地铁,充分利用地下空间来缓解交通问题。地铁修建一般都是在人口众多、建筑物密集的市区中进行的。所以盾构地铁施工会不可避免的对周围建(构)筑物如,高层建筑物、高铁、高架桥的等产生影响。由于上述提到的建(构)筑物一般使用桩基础。所以研究当盾构临近基桩施工对桩体的影响具有重要现实意义。目前,合肥地铁一号线和二号线正在施工,本文依据合肥地铁工程实例,通过理论分析、数值模拟分析和现场实测等分析手段结合起来的方法,对在盾构法隧道施工对邻近桩基影响进行了分析与研究。具体通过以下步骤来实现:1、首先在阅读大量文献的基础上,总结了国内外关于盾构法施工对桩体影响的研究现状,并在此基础上,利用工分析法推导出盾构近接桩体施工时,桩体的位移沉降公式。2、其次结合合肥实际工程实例,运用大型有限元软件MIDAS NX动态模拟了盾构法施工对周围地层及桩体的影响,分析盾构掘进时,周围土体和基桩的位移反应规律。并与实际监测数据对比,分析所建立模型是否合理以及数据偏差的原因。3、在上述模型基础上,考虑了当地铁隧道与桩体不同空间位置时,盾构地铁施工对桩体的影响,得出了隧道与桩体的安全范围。4、最后本文总结了盾构施工近接桩基的一些着重控制点和常用工程保护措施,以后类似工程可以作为参考。
[Abstract]:Nowadays, with the development of economy, the pace of urbanization is accelerating, the number of urban population is increasing, the urban traffic carrying capacity is becoming more and more insufficient, the problem of urban traffic congestion needs to be alleviated urgently, therefore, many large and medium-sized cities in our country are building subway. Make full use of underground space to alleviate traffic problems. Subway construction is generally carried out in densely populated urban areas. So the shield construction will inevitably have an impact on the surrounding buildings such as high-rise buildings, high-speed rail, viaducts and so on. As the above mentioned building (construction) generally uses pile foundation. Therefore, it is of great practical significance to study the influence of shield construction on pile body. At present, Hefei Metro Line 1 and Line 2 are under construction. According to the example of Hefei Metro Project, this paper combines theoretical analysis, numerical simulation analysis and field measurement. The influence of shield tunnel construction on adjacent pile foundation is analyzed and studied. Firstly, on the basis of reading a lot of literature, the paper summarizes the research status of shield construction on pile body at home and abroad, and on this basis, This paper deduces the displacement and settlement formula of the shield near connecting pile by using the method of engineering analysis. Secondly, combining with the actual engineering example in Hefei, the influence of shield construction on the surrounding strata and pile body is simulated dynamically by using the large-scale finite element software MIDAS NX. The displacement response law of surrounding soil and foundation pile during shield tunneling is analyzed. Compared with the actual monitoring data, the paper analyzes whether the established model is reasonable and the reasons of the data deviation. 3. On the basis of the above model, the influence of shield tunneling construction on the pile body is considered when the subway tunnel and pile body are in different spatial positions. The safety range of tunnel and pile body is obtained. 4. Finally, this paper summarizes some important control points and common engineering protection measures for the near connection pile foundation in shield construction, which can be used as a reference in the future.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43
本文编号：2395228
[Abstract]:Nowadays, with the development of economy, the pace of urbanization is accelerating, the number of urban population is increasing, the urban traffic carrying capacity is becoming more and more insufficient, the problem of urban traffic congestion needs to be alleviated urgently, therefore, many large and medium-sized cities in our country are building subway. Make full use of underground space to alleviate traffic problems. Subway construction is generally carried out in densely populated urban areas. So the shield construction will inevitably have an impact on the surrounding buildings such as high-rise buildings, high-speed rail, viaducts and so on. As the above mentioned building (construction) generally uses pile foundation. Therefore, it is of great practical significance to study the influence of shield construction on pile body. At present, Hefei Metro Line 1 and Line 2 are under construction. According to the example of Hefei Metro Project, this paper combines theoretical analysis, numerical simulation analysis and field measurement. The influence of shield tunnel construction on adjacent pile foundation is analyzed and studied. Firstly, on the basis of reading a lot of literature, the paper summarizes the research status of shield construction on pile body at home and abroad, and on this basis, This paper deduces the displacement and settlement formula of the shield near connecting pile by using the method of engineering analysis. Secondly, combining with the actual engineering example in Hefei, the influence of shield construction on the surrounding strata and pile body is simulated dynamically by using the large-scale finite element software MIDAS NX. The displacement response law of surrounding soil and foundation pile during shield tunneling is analyzed. Compared with the actual monitoring data, the paper analyzes whether the established model is reasonable and the reasons of the data deviation. 3. On the basis of the above model, the influence of shield tunneling construction on the pile body is considered when the subway tunnel and pile body are in different spatial positions. The safety range of tunnel and pile body is obtained. 4. Finally, this paper summarizes some important control points and common engineering protection measures for the near connection pile foundation in shield construction, which can be used as a reference in the future.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43
【参考文献】
相关期刊论文 前2条
1 王炳军;党彦;;盾构法隧道开挖对摩擦桩的影响[J];水利与建筑工程学报;2006年03期
2 赵华松,周文波,刘涛,冯伟;双线平行盾构施工引起的土体位移分析及其软件开发[J];上海大学学报(自然科学版);2005年04期
相关硕士学位论文 前1条
1 李德胜;盾构隧道近接施工对邻近既有桩基的影响研究[D];山东科技大学;2008年
，本文编号：2395228
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2395228.html
