混凝土挡土墙工程施工技术.rar

混凝土挡土墙工程施工技术

　　摘要： 混凝土挡土墙工程施工技术

关键词： 挡土墙 施工
　　1、基槽挖土方：本工程挖基槽土方采用挖掘挖机及人工配合进行开挖。挖基配合墙体施工分段进行，先测量放线，定出开挖中线及边线，起点及终点，设立桩标，注明高程及开挖深度，用1m3反铲挖掘机开挖，多余的土方装车外运弃土。在施工过程中，应根据实际需要设置排水沟及集水抗进行施工排水，保证工作面干燥以及基底不被水浸。
　　2、地基处理：当挖基发现有淤泥层或软土层时，需进行换土处理，报请监理工程师及业主批准后，才进行施工。
　　3、碎石垫层施工：根据设计图纸现浇钢筋砼挡土墙。基底铺20公分厚碎石垫层，并用打夯机夯入地基土。以便增加基底摩擦系数。予制挡土墙的基础垫层为C10砼垫层10公分厚。
　　4、钢筋安装：
　　现浇钢筋基础先安装基础钢筋，预理墙身竖向钢筋，待基础浇灌砼完后且砼达到2.5Mpa后，进行墙身钢筋安装。
　　预制钢筋砼挡土墙的基础钢筋分二次安装，第一次安装最底层的钢筋，基础达到一定强度，安装好预制墙身后，再安装第二阶的基础钢筋。
　　5、现浇砼基础：按挡土墙分段长，整段进行一次性浇灌，在清理
Construction of concrete retaining walls

Abstract: Construction of concrete retaining walls

Key words: retaining wall
1, the base slot earth digging: dug foundation trench of the project by digging earth digging machine and carry out excavation and artificial. Sub-base with the wall construction digging carried out the first measurement and setting, set the center line and sideline excavation will start and finish, set up piles marked, indicate the height and depth of excavation, with 1m3 backhoe excavation, excess Sinotrans spoil earth loading. During the construction process, should be set according to actual needs for construction of drains and drainage catchment Anti ensure face drying and will not be flooding the basement.
2, ground: When the excavation base layer or the soft mud found in soil, the need for changing soil, reported to the supervising engineer and owner approval only after the construction.
3, gravel cushion construction: According to the design drawings situ reinforced concrete retaining wall. Shop 20 cm thick gravel base cushion, and rammed into the ground with earth tampers. In order to increase the basal friction coefficient. Retaining wall to the foundation system for the C10 concrete cushion cushion 10 cm thick.
4, steel installation:
Reinforced base to install the base steel, pre-handling vertical wall reinforcement, pouring concrete to be finished and the concrete foundation to reach 2.5Mpa was conducted after the installation of reinforced walls.
Prefabricated steel reinforced concrete retaining wall basis for sub-second install, first install the bottom of the steel, base reaches a certain intensity, pre-installed behind the wall, then install the second phase of the base steel.
5, Place Concrete Foundation: According to a long section of retaining walls, the whole one-time watering, cleaning up