凯莱大酒店深基坑工程设计与施工关键技术研究
发布时间：2018-10-23 11:43
【摘要】：在基坑支护工程中桩锚支护结构以其独特的优势得到了广泛应用，但工程事故偶有发生，对其设计与施工中的关键技术问题进行研究显得十分必要。 本文以北京凯莱大酒店深基坑工程为背景，分析了目前常用的深基坑支护形式，根据本工程特点（基础轮廓、埋深等）、土层性质（土层工程性质及水文条件）、周边环境（拟建建筑与周边建筑物、道路、地下管线的位置关系等）及使用要求（结构施工期间用地及堆载要求等），对该基坑进行了支护设计优选和受力变形的稳定性分析。对护坡桩施工过程中出现的塌孔现象进行了深入的研究分析，论证了长螺旋钻机压注水泥浆成孔倒插钢筋笼法在本工程的适用性。提出了在北京地区砂卵石地层中设置止水帷幕的理念。利用FLAC3D对土体应力和位移、护坡桩桩身弯矩和位移、锚索轴力的分布和发展规律进行了数值模拟分析，并利用TFL-S-NMxx振弦式混凝土应变计对护坡桩桩体内力进行了现场监测。数值模拟和现场实测表明：支护结构受力远小于其承载能力，水平位移小于报警值，，有较大的安全储备。
[Abstract]:The pile-anchor support structure has been widely used in foundation pit support engineering because of its unique advantages, but accidents occasionally occur, so it is very necessary to study the key technical problems in its design and construction. Based on the deep foundation pit project of Kelai Hotel in Beijing, this paper analyzes the common supporting forms of deep foundation pit, according to the characteristics of the project (foundation outline, Soil properties (soil engineering properties and hydrological conditions), surrounding environment (proposed building and surrounding buildings, roads, etc.), The optimum selection of supporting design and the stability analysis of stress and deformation of the foundation pit are carried out based on the location relation of underground pipeline and the requirements for use of land and load during the construction of the structure. In this paper, the phenomenon of hole collapse in the construction of slope protection pile is studied and analyzed in depth, and the applicability of the method of inverting the reinforcement cage into the hole of the long screw drilling machine is proved. The idea of setting up a waterproof curtain in the sand and gravel strata in Beijing area is put forward. The stress and displacement of soil, the bending moment and displacement of pile body and the distribution and development of axial force of anchor cable are numerically simulated and analyzed by FLAC3D, and the internal force of slope protection pile is monitored by TFL-S-NMxx vibrating chord concrete strain gauge. Numerical simulation and field measurement show that the bearing capacity of the supporting structure is much less than its bearing capacity, the horizontal displacement is less than the alarm value, and there is a large safety reserve.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU753
本文编号：2289133
[Abstract]:The pile-anchor support structure has been widely used in foundation pit support engineering because of its unique advantages, but accidents occasionally occur, so it is very necessary to study the key technical problems in its design and construction. Based on the deep foundation pit project of Kelai Hotel in Beijing, this paper analyzes the common supporting forms of deep foundation pit, according to the characteristics of the project (foundation outline, Soil properties (soil engineering properties and hydrological conditions), surrounding environment (proposed building and surrounding buildings, roads, etc.), The optimum selection of supporting design and the stability analysis of stress and deformation of the foundation pit are carried out based on the location relation of underground pipeline and the requirements for use of land and load during the construction of the structure. In this paper, the phenomenon of hole collapse in the construction of slope protection pile is studied and analyzed in depth, and the applicability of the method of inverting the reinforcement cage into the hole of the long screw drilling machine is proved. The idea of setting up a waterproof curtain in the sand and gravel strata in Beijing area is put forward. The stress and displacement of soil, the bending moment and displacement of pile body and the distribution and development of axial force of anchor cable are numerically simulated and analyzed by FLAC3D, and the internal force of slope protection pile is monitored by TFL-S-NMxx vibrating chord concrete strain gauge. Numerical simulation and field measurement show that the bearing capacity of the supporting structure is much less than its bearing capacity, the horizontal displacement is less than the alarm value, and there is a large safety reserve.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU753
【参考文献】
相关期刊论文 前10条
1 张怀静,张友葩,金爱兵;深基坑支护的数值分析[J];北京建筑工程学院学报;2003年02期
2 张锦屏;基坑工程的特点和若干问题分析[J];低温建筑技术;2003年03期
3 黄院雄;刘国彬;张建峰;;考虑时空效应的有支护深基坑主动区土压力的取值[J];地下工程与隧道;1998年02期
4 刘建航,刘国彬,范益群;软土基坑工程中时空效应理论与实践(上)[J];地下工程与隧道;1999年03期
5 刘纯洁,刘国彬,侯学渊;考虑时空效应的软土深基坑墙后土体水平位移场计算[J];地下工程与隧道;1999年03期
6 杨国伟,王如路,刘建航;时空效应规律在深基坑施工中的应用[J];地下工程与隧道;2000年04期
7 李俊才,殷雷,成俊;南京地区深基坑支护设计现状及存在的问题[J];地质灾害与环境保护;2000年03期
8 李云安,钟玉芳,张鸿昌;影响基坑变形的实质性状态变量分析[J];地质与勘探;2000年02期
9 李云安,葛修润,张鸿昌;深基坑工程变形控制与有限元数值模拟分析[J];地质与勘探;2001年05期
10 王渭漳,吴亚中;墙背土压力分布计算的新理论公式及试验验证[J];湖南交通科技;1995年02期
相关博士学位论文 前1条
1 彭社琴;超深基坑支护结构与土相互作用研究[D];成都理工大学;2009年
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