质量通病防治手册管理、公路、桥梁

质量通病防治手册管理、公路、桥梁内容摘要：

.................................... 109 锚喷混凝土喷层厚度不足 ................................................................. 110 墙背回填不实 ..................................................................................... 111 3 桥梁工程 ................................................................................................................ 112 明挖地基 ....................................................................................................... 112 基坑 ..................................................................................................... 112 放坡开挖塌方 ........................................................................... 112 基坑超挖、基底扰动 ............................................................... 114 基坑泡水 ................................................................................... 115 基坑底出现橡皮土 ................................................................... 116 基坑底出现冒水、流砂 ........................................................... 117 基坑底土体隆起 ....................................................................... 118 基坑底突涌 ............................................................................... 119 基坑底部地质情况与设计不符 ............................................... 119 基坑支护 ............................................................................................. 120 支撑安装不及时 ....................................................................... 120 支撑与围檩面不垂直 ............................................................... 121 支撑直线度差 ........................................................................... 122 支撑间距过大、节点质量不合格 ........................................... 123 支撑不水平 .............................................................................. 123 支护 结构与围檩不密贴 ........................................................... 124 支护结构渗漏水 ....................................................................... 125 悬臂式排桩嵌固深度不足 ...................................................... 126 钢支撑失稳 .............................................................................. 127 钢管支撑弯曲破坏 ................................................................. 127 钢板桩桩身转动 ..................................................................... 128 钢板桩发生 共连 ..................................................................... 129 基坑回填 ............................................................................................. 129 回填不及时 ............................................................................... 129 回填沉陷 ................................................................................... 130 围堰 ..................................................................................................... 132 钢围堰渗漏水 ........................................................................... 132 钢板桩围堰无法合龙 ............................................................... 133 钢板桩围堰渗漏水 ................................................................... 133 钢板桩围堰拔除困难 ............................................................... 135 沉井基础 ...................................................................................................... 136 砂垫层承载力不足 ............................................................................. 136 外壁粗糙、鼓胀 ................................................................................. 136 井壁裂缝 ............................................................................................. 138 沉井歪斜 ............................................................................................. 139 井点降水效果未能达到设计要求 ..................................................... 140 下沉困难 ............................................................................................. 142 下沉过快 ............................................................................................. 144 突沉 ..................................................................................................... 145 下沉过慢 ............................................................................................. 146 下沉搁置 .......................................................................................... 148 沉井悬挂 .......................................................................................... 149 倾斜度过大 ...................................................................................... 150 平面位移过大 .................................................................................. 152 下沉遇流砂 ...................................................................................... 154 下沉遇坚硬土层 .............................................................................. 155 遇倾斜岩层 ...................................................................................... 156 外围地面沉降过大 ........................................................................... 156 井壁渗漏水 ...................................................................................... 157 沉井超沉或欠沉 .............................................................................. 158 沉井失稳 .......................................................................................... 159 封底混凝土漏水 .............................................................................. 160 封底抽水后上浮 .............................................................................. 161 沉井上浮 .......................................................................................... 162 地下连续墙基础 ........................................................................................... 164 导墙施工 ............................................................................................. 164 导墙墙体不稳定 ...................................................................... 164 导墙内外侧施工平台不稳定 .................................................. 165 导墙顶面标高不够或不等高 .................................................. 165 导 墙平面位置偏位 .......................。