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寒冷地区pvc-u螺旋缠绕管的施工方式!

作者: admin    来源:http://www.laobingguandao.com  时间:2020-02-26    人气:
根据《建设工程冬季施工规范》的有关规定,连续5天室外日平均气温低于零下5度,为冬季施工。冬季施工分为6个小点进行介绍。
According to the relevant provisions of the code for winter construction of construction engineering, the outdoor daily average temperature for 5 consecutive days is lower than - 5 ℃, which is winter construction. Winter construction is divided into six small points for introduction.
1. 沟开挖
1. ditch excavation
冬季,土方开挖一般与管道安装同时进行,尽可能地同时开挖、铺设管道、回填管道,以保证管道施工质量。土方施工应在土方冻结前完成,不能开挖时应采取保温措施防止土体冻结。
In winter, the earth excavation is generally carried out at the same time as the pipeline installation, and the pipeline excavation, laying and backfilling are carried out at the same time as much as possible to ensure the quality of pipeline construction. Earthwork construction shall be completed before earthwork freezing, and insulation measures shall be taken to prevent soil freezing when excavation is not possible.
土方防冻措施:首先是把地面上的防冻液翻过来,土方防冻液一般可用机械翻过来松松的,然后将其耙平,对含水量较大的土壤,应立即将松松后晾干,再将其耙碎。
Earth anti freezing measures: first, turn over the anti freezing liquid on the ground. Generally, the earth anti freezing liquid can be turned over and loosened by machinery, and then it can be raked flat. For the soil with large water content, it should be immediately loosened and dried, and then it can be raked to pieces.
冬季有两种开挖方法:人工开挖冻土、挖沟开挖面积和薄层冻土、砂土或腐殖质土等条件不可用,人工开挖冻土。开挖开挖面积大、冻土厚度大于0.5米的基坑时,应进行冻土的机械开挖。机械开挖至设计标志预留20-30厘米土。这应该使用精密仪器或离居民区稍远一点的地方,因为它会对居民造成干扰。
There are two excavation methods in winter: manual excavation of frozen soil, excavation area of trench and thin layer of frozen soil, sand or humus soil are not available, and manual excavation of frozen soil. When excavating the foundation pit with a large area and a frozen soil thickness greater than 0.5m, the mechanical excavation of frozen soil shall be carried out. 20-30cm soil shall be reserved from mechanical excavation to design mark. This should be done with precision instruments or a little further away from residential areas, as it can cause interference to residents.
2. 管道基础施工
2. Pipeline foundation construction
管道基础施工、中砂基础施工、管径大于500mm、加砂垫层大于200mm的混凝土管道和铸铁管道基础施工,同时进行回填混凝土基础施工。冬季施工一般选用普通硅酸盐水泥或普通硅酸盐水泥,以缩短固化时间。
Pipeline foundation construction, medium sand foundation construction, concrete pipeline and cast iron pipeline foundation construction with pipe diameter greater than 500mm and sand cushion greater than 200mm, and backfilling concrete foundation construction. Ordinary portland cement or ordinary portland cement is generally used in winter construction to shorten the curing time.
3.管道铺设
3. Pipeline laying
管道,管道安装前应严格清洗里面的雪和冰的基坑,直管在冰雪上,应该检查根管安装,管道和运输过程中小心翼翼地保护冻裂,预应力钢筋混凝土管和管可以放在冻土槽内,但通过建立阀门出口,应设置必要的沉降的预防措施,严禁钢筋混凝土管在冻土冻胀、粗砂填土、管底平整、管道接口处压实后再入实施工。冬季应分段安装钢管,每段长度按温度应力计算。
Before the installation of pipes, the foundation pit of snow and ice inside shall be cleaned strictly. When the straight pipes are on the ice and snow, the root pipe installation shall be checked. During the pipeline and transportation, the frost crack shall be carefully protected. The prestressed reinforced concrete pipes and pipes can be placed in the frozen soil groove. However, necessary settlement prevention measures shall be set up by establishing the valve outlet, It is strictly prohibited to carry out the construction of reinforced concrete pipe after frost heaving, coarse sand filling, pipe bottom leveling and pipe joint compaction. Steel pipes shall be installed in sections in winter, and the length of each section shall be calculated according to the temperature stress.
4. 管道界面施工
4. Pipeline interface construction
冬季焊接钢管应防风、防雪,保证焊接现场附近的管道无冰雪,防止管道焊接接头和机器冷却。钢筋混凝土管道界面施工的水泥砂浆,一般用于参与防冻砂浆,一般用于应急工程。目前,对于小直径钢筋混凝土管道、承载管和大直径舌槽,均采用橡胶圈柔性界面。施工时,也可将橡胶圈放置在挖掘机盖上加热,并可涂防滑油,防止橡胶圈倾覆损坏。
The welded steel pipe shall be windproof and snowproof in winter to ensure that the pipe near the welding site is free of ice and snow and prevent the pipe welding joint and machine cooling. The cement mortar for reinforced concrete pipeline interface construction is generally used for participating in antifreeze mortar and emergency engineering. At present, rubber ring flexible interface is used for small diameter reinforced concrete pipe, load-bearing pipe and large diameter tongue groove. During construction, the rubber ring can also be placed on the cover of the excavator for heating, and anti-skid oil can be applied to prevent the rubber ring from overturning and damage.
5. 检查井施工
5. Inspection well construction
钢铁加工运输和绑定的过程中应注意防止缺陷的影响,如雕刻,冰雪天采取保护装置和其他措施,以防止钢筋表面冰镏,在混凝土浇筑前,应明确强化的雪和冰,热空气加热必要时,绑定到下一个工序后,但一定要检查合格才能进入下一步的混凝土。
In the process of steel processing, transportation and binding, attention shall be paid to prevent the influence of defects, such as carving, protective devices and other measures shall be taken in ice and snow days to prevent the steel bar surface from ice plating. Before concrete pouring, the strengthened snow and ice shall be clearly defined. When it is necessary to heat the hot air, it shall be bound to the next process, but the next concrete can only be entered after it is checked to be qualified.
pvc-u螺旋缠绕管
温室混凝土施工的施工方法,支架和2条纹布层和一层50 mm棉花感觉全部采用4线张力,现在普遍使用电加热器,更近在去年,它开始使用热封,水泥适当提高一个标签,根据需求与早强剂、防冻剂防冻剂,不渗透性代理自己的保护。
The construction method of greenhouse concrete construction, the support, 2 stripe cloth layer and a layer of 50 mm cotton feel all adopt 4-wire tension, now the electric heater is widely used, recently last year, it began to use heat seal, and the cement appropriately increased a label, according to the demand and the protection of early strength agent, antifreeze agent and impermeability agent.
6. 冬季壕沟回填注意事项
6. Precautions for trench backfilling in winter
回填应在管道安装完毕后,检查井灰浆的强度是否符合强度要求,并在挖沟后一定要除去积水、除冰等杂物,一般用于干燥粗砂回填。取原土回填时,建议现在开挖使用,否则挖出的冻土不会堆积成保温材料。
After the installation of the pipeline, the strength of the mortar in the well shall be checked to see if it meets the strength requirements. After the trench is dug, the sundries such as ponding and deicing shall be removed. It is generally used for dry coarse sand backfilling. When backfilling with the original soil, it is recommended to excavate now, otherwise the excavated frozen soil will not be stacked into insulation materials.
冻土土回填时,冻土直径不宜大于15cm,应均匀分布,逐层压实。管道顶部500mm以内不得回填含有冻土的土壤,有构筑物和人行道的道路不得回填冻土。
When the frozen soil is backfilled, the diameter of frozen soil should not be greater than 15cm, it should be evenly distributed and compacted layer by layer. The soil containing frozen soil shall not be backfilled within 500mm from the top of the pipeline, and the road with structures and sidewalks shall not be backfilled with frozen soil.
土方回填时,每层厚度比常温施工减少20-25%,增加预留沉降量。填方上层回填不冻透土,厚度满足设计要求。含有冻土的土,不得在填方坡面1米以内回填。
During earthwork backfilling, the thickness of each layer is 20-25% less than that of normal temperature construction, and the reserved settlement is increased. The upper layer of the fill is backfilled with non frost permeable soil, and the thickness meets the design requirements. Soil with frozen soil shall not be backfilled within 1m of the filling slope.

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