建筑垃圾再生排水CFG桩关键技术应用研究
发布时间：2019-01-26 12:52
【摘要】：本文提出了建筑垃圾再生排水CFG桩地基处理新技术,即建筑垃圾再生排水CFG桩由环状砂井和CFG桩共同构成,砂井材料和CFG桩桩体骨料全部采用建筑垃圾(本文特指废弃混凝土,后同)再生材料,建筑垃圾再生排水CFG桩和桩间土以及砂砾石或碎石垫层一起形成建筑垃圾再生排水CFG桩复合地基。本文对建筑垃圾再生排水CFG桩地基处理技术,通过室内外试验、理论推导和有限元分析等方法进行了系统的研究探索。主要研究内容及结论如下:(1)对建筑垃圾再生骨料的基本物理力学性质进行了室内测定,进行了低强度建筑垃圾再生CFG桩混合料配合比设计,研究了各配合比CFG混合料强度、变形等性质;认为建筑垃圾再生骨料可满足作为低强度CFG桩桩身材料的骨料要求。(2)进行了建筑垃圾再生排水CFG桩及其复合地基的静载荷试验,对建筑垃圾再生排水CFG桩承载力及桩身轴力、桩侧摩阻力传递规律进行了研究。(3)进行了建筑垃圾再生排水CFG桩的现场成桩试验,对施工产生的超孔隙水压力和土体深层水平位移进行了监测。提出了建筑垃圾再生排水CFG桩施工工艺和施工方法,研究了施工中土体孔隙水压力变化规律和挤土效应。(4)基于砂井固结理论,推导了环状砂井地基固结解析解,并利用Plaxis有限元软件,分析了路堤下建筑垃圾再生排水CFG桩复合地基固结特性以及沉降影响因素。本文提出的建筑垃圾再生排水CFG桩地基处理技术,可提高地基处理效率,节约造价,减少污染。
[Abstract]:In this paper, a new technology for foundation treatment of recycled construction waste drainage CFG pile is proposed, that is, construction waste recycled drainage CFG pile is composed of annular sand well and CFG pile, sand well material and CFG pile aggregate are all made of construction waste (this paper refers specifically to abandoned concrete). With the same recycled materials, the composite foundation of recycled drainage CFG pile of construction waste is formed together with the soil between piles and gravel or gravel cushion. In this paper, the foundation treatment technology of recycled drainage CFG pile for construction waste is studied systematically through indoor and outdoor tests, theoretical derivation and finite element analysis. The main research contents and conclusions are as follows: (1) the basic physical and mechanical properties of recycled aggregate of construction waste are measured in laboratory, and the mix proportion design of low strength recycled CFG pile mixture is carried out. The strength, deformation and other properties of CFG mixture are studied. It is considered that the recycled aggregate of construction waste can meet the requirement of aggregate as the material of low strength CFG pile. (2) the static load test of recycled drain CFG pile and its composite foundation is carried out. In this paper, the bearing capacity, axial force and frictional resistance of CFG pile are studied. (3) the field piling test of recycled drainage CFG pile of construction waste is carried out. The excess pore water pressure and the deep horizontal displacement of soil are monitored. The construction technology and construction method of recycled waste drainage CFG pile are put forward, and the variation law of pore water pressure and soil squeezing effect during construction are studied. (4) based on the consolidation theory of sand well, the analytical solution for consolidation of annular sand well foundation is derived. By using Plaxis finite element software, the consolidation characteristics and settlement influence factors of CFG pile composite foundation under embankment are analyzed. The construction waste recycled drainage CFG pile foundation treatment technology proposed in this paper can improve the efficiency of foundation treatment, save cost and reduce pollution.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X799.1;TU753.3
本文编号：2415506
[Abstract]:In this paper, a new technology for foundation treatment of recycled construction waste drainage CFG pile is proposed, that is, construction waste recycled drainage CFG pile is composed of annular sand well and CFG pile, sand well material and CFG pile aggregate are all made of construction waste (this paper refers specifically to abandoned concrete). With the same recycled materials, the composite foundation of recycled drainage CFG pile of construction waste is formed together with the soil between piles and gravel or gravel cushion. In this paper, the foundation treatment technology of recycled drainage CFG pile for construction waste is studied systematically through indoor and outdoor tests, theoretical derivation and finite element analysis. The main research contents and conclusions are as follows: (1) the basic physical and mechanical properties of recycled aggregate of construction waste are measured in laboratory, and the mix proportion design of low strength recycled CFG pile mixture is carried out. The strength, deformation and other properties of CFG mixture are studied. It is considered that the recycled aggregate of construction waste can meet the requirement of aggregate as the material of low strength CFG pile. (2) the static load test of recycled drain CFG pile and its composite foundation is carried out. In this paper, the bearing capacity, axial force and frictional resistance of CFG pile are studied. (3) the field piling test of recycled drainage CFG pile of construction waste is carried out. The excess pore water pressure and the deep horizontal displacement of soil are monitored. The construction technology and construction method of recycled waste drainage CFG pile are put forward, and the variation law of pore water pressure and soil squeezing effect during construction are studied. (4) based on the consolidation theory of sand well, the analytical solution for consolidation of annular sand well foundation is derived. By using Plaxis finite element software, the consolidation characteristics and settlement influence factors of CFG pile composite foundation under embankment are analyzed. The construction waste recycled drainage CFG pile foundation treatment technology proposed in this paper can improve the efficiency of foundation treatment, save cost and reduce pollution.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X799.1;TU753.3
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