旋喷桩施工工艺标准.doc

1 适用范围
本工艺标准适用于工业与民用建筑工程中的淤泥淤泥质土粘性土粉土砂土
湿陷性黄土人工填土及碎石土等的地基加固既有建筑和新建筑的地基处理深基坑侧
壁挡土或挡水基坑底部加固防止管涌与隆起坝的加固与防水帷幕等工程
2 材料准备
2.1 水泥应采用32.5 级或42.5 级普通水泥要求新鲜无结块一般泥浆水灰比为1 1
1.5 为消除离析一般再加入水泥用量3%的陶土0.9%的碱浆液宜在旋喷前1h 以内配
制使用时滤去硬块砂石等以免堵塞管路和喷嘴
3 施工机具
3.1 主要机具设备高压泵钻机浆液搅拌器等辅助设备包括操纵控制系统高压管
路系统材料储存系统以及各种管材阀门接头安全设施等
3.2 高压喷射注浆法施工常用主要机具设备规格技术性能要求见下表
4 工艺流程
4.1 作业条件
4.1.1 应具有工程地质勘察报告基础施工图和施工组织设计
4.1.2 施工场地内的地上和地下障碍物已清除或拆迁
4.1.3 平整场地挖好排浆沟排水沟设置临时设施
4.1.4 测量放线并设置桩位标志
4.1.5 现场大样在室内按不同含水量和配合比进行配方试验已优选出合理的浆液配方
4.1.6 机具设备已配齐进场并进行维修安装就位进行试运转进行现场试桩已
确定成桩施工的各项施工参数和工艺
4.2 旋喷桩可根据工程情况和机具条件采用单管法二重管法三重管法三种工程应用较
多的为单管法和三重管法见图115-1 图115-2 图115-3 图115-4
4.3 旋喷桩的施工程序为机具就位贯入注浆管试喷浆旋喷注浆拔管及冲洗等
4.4 单管法和二重法可用注浆管射水成孔至设计深度后再一边提升一边进行

1 Scope
This technology is applicable to industrial and civil engineering silt clay silt silty sand soil
Loess soil and other artificial fill and the foundation stone Consolidation of existing buildings and new construction adjacent deep excavation of foundation treatment
Or retaining wall retaining reinforced bottom of the pit to prevent piping and uplift the curtain dam reinforcement and waterproofing works
2 material prepared
2.1 Cement should be 32.5 or 42.5 Ordinary cement requirement of fresh water cement ratio for the non-caking mud generally 1 1
1.5 for the elimination of segregation in general and then adding 3% of the clay content of cement, 0.9% of the base size should less than 1h before the jet with
System used to filter sand lumps to avoid blocking pipes and nozzles etc.
3 construction equipment
3.1 The main machinery equipment such as high-pressure pump drilling slurry mixer control system, auxiliary equipment, including manipulation of high-pressure pipe
Road System materials and a variety of pipe storage system safety valves and other fittings
3.2 high-pressure jet grouting method commonly used in major construction machinery equipment specifications technical performance requirements of the table below
4 process
4.1 Operating conditions
4.1.1 should be the basis of engineering geological investigation report of construction drawings and construction organization design
4.1.2 above and below ground within construction site have been removed or the removal of obstructions
4.1.3 leveling the ground and dug row of temporary facilities for slurry trench drains
4.1.4 Measure for and set the pile flag
4.1.5 Large sample site at different water content in the indoor and co-pilot has been optimized formulation compared to a reasonable size formula
4.1.6 machinery and equipment has been installed for maintenance approach and make a trial run in place on-site installation of test piles have been
Into the pile to determine the construction parameters and process
4.2 rotating pile conditions and equipment according to project conditions of the double tube method using single-tube method Application of three triple tube more
More single-tube method and the triple tube map Figure 115-1 115-4 115-2 Figure Figure 115-3
4.3 Construction procedures rotating pile penetration for the machinery in place shotcrete grouting tube jet grouting trial extubation and washed
4.4 Single tube and double tube water jet grouting method can be used to design the depth of hole and then raise the side to side

前往下载