| 检查井五种施工工法有如下优缺点： |
| 添加时间：2019/8/10 14:39:35 浏览次数： |
| 检查井五种施工工法有如下优缺点： Five construction methods of inspection wells have the following advantages and disadvantages: 1、传统砖砌检查井：需要人工砌筑，质量取决于工人技术水平。劳动生产率低下，不利于管道装配化快速施工，影响城市交通。强度低、使用一段时间后表皮脱落内里疏松，造成检查井整体下沉，周边路面沉降，成为道路工程中的一大通病。透水性高，污染地下水资源。粘土烧结，破坏耕地。 1. Traditional brick inspection wells: need to be manually built, the quality depends on the technical level of workers. Low labor productivity is not conducive to rapid pipeline assembly construction, affecting urban traffic. Low strength and loose inner skin after using for a period of time cause the overall subsidence of inspection wells and the settlement of surrounding pavement, which has become a common problem in road engineering. High permeability and pollution of groundwater resources. Clay sintering destroys farmland. 2、现浇混凝土检查井：现场模板支护，开挖断面大，扰动现状土范围大。异型检查井支护模板难度大。养护时间长。总体造价高。 2. Cast-in-situ concrete inspection wells: on-site formwork support, large excavation section, large disturbance current soil range. The support formwork of special-shaped inspection wells is very difficult. Maintenance time is long. The overall cost is high. 3、预制装配和模块砌筑检查井：预制装配式钢筋砼检查井的大型预制件在城市中运输难度大（立交桥、过街天桥限高）。施工现场需要吊车，增加造价。接入管高程、管径大小与方向控制精度要求高。需要模具数量较大。预制混凝土模块检查井已形成标准化、系列化，总体造价较预制装配式钢筋砼检查井低，但强度与施工稍逊。目前注浆和防渗有待研究。 3. Prefabricated assembly and modular masonry inspection wells: Large prefabricated parts of prefabricated reinforced concrete inspection wells are difficult to transport in cities (overpasses and overpasses are limited to high levels). The construction site needs cranes to increase the cost. The control accuracy of height, diameter and direction of access pipe is required. A large number of moulds are needed. The prefabricated concrete module inspection wells have been standardized and serialized. The overall cost of prefabricated reinforced concrete inspection wells is lower than that of prefabricated prefabricated reinforced concrete inspection wells, but the strength and construction are slightly lower. At present, grouting and seepage prevention need to be studied. 4、需制作沉井、施工速度慢、接入管高程、方向和均匀垂直沉降与难于控制。 4. The caisson needs to be made, the construction speed is slow, the elevation, direction and even vertical settlement of the access pipe are difficult to control. 5、塑料检查井：强度低、不能上重型碾压机具、与不同材质管材连接有难度、井室小于1200、井周难于回填密室。竖向承载能力低，用于道路需要对井口进行复杂处理。 5. Plastic inspection wells: low strength, unable to use heavy rolling tools, difficult to connect with different materials, wellbore less than 1200, wellbore is difficult to backfill. Vertical bearing capacity is low, so it needs complex treatment of wellhead for road. |
| 上一页 护坡塑料模鉴定方法 |
| 下一页 塑料模具材料要求 |
Copyright © 技术支持：遨游网络