1、 1 摘摘 要要 地基处理的目的主要是提高地基强度和控制地基变形。本论文中所涉及的建筑物场地 位于郑东新区，工程地质条件较差，天然地基承载力不足，可以采用 CFG 桩复合地基进行 加固。CFG 桩复合地基虽说是近些年才发展起来的，但其施工速度快，建筑成本低，可调 性、适合性、可靠性好，复合地基沉降小，目前 CFG 桩复合地基在许多地区广泛应用。 根据建筑物场地的岩土工程勘察资料，论文对场地工程地质条件进行分析和评价和 CFG 桩复合地基的设计。设计的主要内容有有效桩长，桩径，桩间距，面积置换率，单桩 承载力，复合地基的承载力，桩体材料强度，并对沉降和倾斜进行了验算，以确保建筑物 的安全。 关键
2、词：CFG 桩复合地基，地基承载力，变形。 2 Abstract The main purpose of the ground treatment is to improve the strength and control of ground the deformation of ground. In this paper, the buildings involved in the site is located in Chung Dong New Area, the engineering geological conditions is poor and the ground bear
3、ing capacity of natural base is not big enough, can be used CFG pile composite foundation reinforced. While CFG pile composite foundation is only developed in recent years, but its speed of construction, building low-cost, adjustable, and the suitability, reliability, and composite foundation settle
4、ment small, the current CFG pile composite foundation widely used in many areas. According to the building site geotechnical engineering investigation of the information， this paper analysis and evaluation the engineering geological conditions of the venue and design CFG pile composite foundation. T
5、he main elements of the design is effective pile length, pile diameter, pile spacing, covering an area of exchange rates, pile capacity, the bearing capacity of composite foundation, pile material strength, and the settlement and tilt were checked to ensure the safety of buildings . Keywords: CFG pi
6、le compound-ground, bearing capacity of foundation soil, deformation. 3 目录 摘 要 1 Abstract 2 1 工程概述及场地工程地质条件 . 5 1.1 拟建工程概况 . 5 1.2 场地地形地貌 . 5 1.3 场地地层岩性 . 6 1.4 场地水文地质条件 . 8 1.4.1 地下水类型、埋深及变幅 . 8 1.4.2 水质分析结果 . 8 1.4.3 地下水腐蚀性评价 . 9 1.5 不良地质作用及对工程不利的埋藏物 10 2 场地岩土工程分析与评价 11 2.1 各岩土层物理力学性质指标 11 2.1.1 各层土物理力学性质指标统计 11 2.1.2 各层土的抗剪强度指标统计 12 2.1.3 各层土承载力特征值 12 2.1.4 各层土压缩性评价 12 2.2 地震效应分析 13 2.2.1 抗震设防烈度及地震动参数 13 2.2.2 场地土类型和建筑场地类别 13 2.2.3 场地和地基土液化评价 13 2.2.4 地基土震陷可能性分析 16 2.3 地基均匀性评价 . 17 3 地
