小区雨排水设计中对新型材料管道和检查井的应用和注意事项 中英(2)

Wells plastics. Another communities with plastic drainage inspection Wells(CJ/T233:2006) of application technology of plastic drainage inspection Wells construction areadrainage inspection Wells successively promulgated. These are from the policies and standardization level of plastic check well promotion has played a role. Plastic check well the cost of single well is brick examination well 74% ~ 94%, and reduced the cost is only the latter 30% ~ 38% every year, according to 50 years service life of plastic inspection Wells, brick Wells life by 20 years). Plastic check well the price advantage is obvious. So in building inside the village should be preferred in inspection Wells plastics.

2 新型材料管道和检查井在小区雨排水设计中应注意的几个问题

2 new materials and check the Wells in the village of rain drainage pipe in the design of several problems should be paid attention to

2.1 塑料管道在设计中应注意的几个问题

2.1 plastic pipe several problems that should be paid attention to in the design

在设计埋地塑料管时,其上的覆土深度是设计者必须考虑的,埋得太浅,管道会抵抗不了冰冻或荷载的影响而丧失承载能力,直至被破坏;埋得越深,造价越高,施工期也越长。因此,为了达到安全运行要求,又节省土方工程量,降低工程造价,取得较高的经济效益,设计时合理地确定其埋深是十分重要的。管道覆土深度通常要满足三个因数:①防止管道内的水冰冻和因土壤冻胀而损坏管道,②防止管壁因荷载而受到破坏,③无压管还必须满足上游管线衔接的要求。对于每一条管道,从这三个不同的因素出发可以得出三个不同的管顶覆土厚度值,取三个中的最大值就可以同时满足上述三个因数的要求,这就是管道允许的最小覆土厚度,也是设计时的重要依据。一般情况下,塑料管道应该埋设在土壤冰冻线以下,设计时应先了解项目所在地的气象资料,弄清当地的冻土层厚度。有的地方冻土层很厚,为了节省投资、提高效益,当该地区或条件相似地区有浅埋经验或采取相应的措施时,也可埋设在冰冻线以上,具体埋设深度应能保证管道长期运行的安全性。在非冰冻地区和土壤冻深较浅的地区,为防止管壁荷载因数起主要作用而破坏埋地塑料管时,宜对覆土深度进行计算。

Buried plastic pipe in the design, it turns the soil depth is, the designer must consider the buried too shallow, the influence of the pipe will not freeze or load resistance and loss of bearing capacity, until they are destroyed; Buried the deeper, the higher the cost, construction period is longer. Therefore, in order to achieve safe operation requirements, and save the earth quantity, reduce the project cost, to achieve higher economic benefits and design reasonably determine the buried depth is very important. Pipeline depth of overlying soil is usually to meet three factors: (1) water freezing and prevent the pipe due to soil frost heave damage to pipeline, (2) to prevent the pipe wall is damaged due to load, (3) no pressure tube must also meet the requirements of upstream piping connection. For each pipeline, starting from the three different factors can be concluded that three different pipe roof covering thickness value, take the maximum in the three can meet the requirements of the above three factors at the same time, this is the pipeline to allow the minimum thickness of overlying soil, was the important basis for design. In general, plastic pipeline should

be buried in the soil below the frost line, when the design should first understand the meteorological data of the project location, find out the local thickness of permafrost. In some places permafrost is very thick, in order to save investment and improve the efficiency, when conditions or similar areas in the region have shallow buried experience or take corresponding measures, can also be buried in the frozen line above, the embedding depth should be able to guarantee the safety of pipeline running for a long time. In the frozen regions and soil frozen deep shallow areas, in order to prevent the pipe wall load factor plays a main role and destroy the buried plastic pipe, should be calculated on the depth of overlying soil.

2.2 塑料检查井在设计中应注意的几个问题

2.2 plastic inspection Wells, some problems that should be paid attention to in the design

①在场地允许的条件下，要尽量避免把检查井布置到一般车行道、消防行车道上，减少防护井盖的使用，降低造价。②塑料雨水检查井应与塑料雨水口井座配套使用，塑料检查井座均设有沉泥室，较大颗粒杂物不进入雨水管道，较小颗粒泥沙则顺水流冲到下游管道，普通的砖砌雨水口则不能达到这种效果。③出户管从井座接入时，每个接户井最多可以与两个出户管连接，出户管从井桶接入时，每个接户井最多可以与四个出户管连接。④条件允许时，汇入管接入角应尽量调整为45°、90°，避免使用变角接头、球型弯头，改善水力条件、降低造价、加快施工速度。

(1) under the condition of field allows to avoid the inspection well arrangement to the roadway, fire general driveway, reduce the use of protective covers, reduce the cost. (2) plastic rain check Wells should be with plastic water Wells, plastic inspection Wells have heavy mud room, larger particles of sundry into rainwater pipeline, less sediment is well stream rushed to the downstream piping and ordinary brick build by laying bricks or stones the rain mouth can\'t reach the effect. 3. Leave home tube from access, well up to meet the household each well with two pipe connection at home, leave home when the pipe barrel access from a well, up to meet the household each well with four pipe connection at home. (4) when conditions permit, into the pipe connection Angle should be adjusted to 45 °, 90 °, avoid the use of variable Angle joints, ball elbow, improve hydraulic conditions, reduce cost, speed up the construction speed.

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说英语学习小区雨排水设计中对新型材料管道和检查井的应用和注意事项 中英(2)在线全文阅读。