双壁波纹管SN4排污管

双壁波纹管SN4排污管施工规范

根据管道平面和已有控制点，并结合实际地形，做好实测数据整理，绘制实测草图。

According to the pipeline plane and existing control points, and combined with the actual terrain, sort out the measured data and draw the measured sketch.

进场后对建设单位交接的水准点和导线点进行复测，闭合差符合设计要求后，进行导线点、水准点的加密，每60米范围内有一个水准点，加密点必须进行闭合平差,水准点的闭合差为20√L，确保加密点的准确，以满足排水管高程、线型控的精度。

After mobilization, the benchmark and traverse points handed over by the construction unit shall be retested. After the closure error meets the design requirements, the traverse points and benchmarks shall be densified. There is a benchmark within every 60m, and the densified points must be closed adjusted. The closure error of the benchmark is 20 √ L, so as to ensure the accuracy of the densified points and meet the accuracy of drainage pipe elevation and linear control.

管道中心由中线控制桩来确定，通过控制桩在管道基础上打出边线，确定管道的铺设位置。

The center of the pipeline is determined by the center line control pile, and the side line is marked on the pipeline foundation through the control pile to determine the laying position of the pipeline.

井室高程根据设计要求进行控制，管道铺设完毕后，要进行管顶及构筑物的竣工复核测量。

The elevation of the well chamber shall be controlled according to the design requirements. After the pipeline is laid, the completion review survey of the pipe top and structures shall be carried out.

双壁波纹管SN4排污管沟槽开挖及基础处理：

熟悉图纸，根据设计给定的水准点及坐标控制点进行测量、定位、放线，引临时水准点及控制桩，经监理工程师复核认证批准后方可进行沟槽开挖。

工程采用挖掘机进行开挖，沟槽开挖要严格控制挖深及管道中心线，机械开挖留20cm的余量，由人工清槽至设计槽底高程位置，并将里程桩引至槽底。

严格控制沟槽开挖放坡系数，按设计的放坡系数挖够宽度，开挖时应注意沟槽土质情况，必要时应请驻地监理和甲方及设计代表现场确定放坡系数，以防槽边塌方。

Be familiar with the drawings, measure, locate and set out according to the benchmark and coordinate control points given in the design, and lead the temporary benchmark and control pile. The trench excavation can be carried out only after the review, certification and approval of the supervising engineer.

Excavators shall be used for the excavation of the project. The excavation depth and pipeline center line shall be strictly controlled for trench excavation. 20cm allowance shall be reserved for mechanical excavation. The trench shall be cleared manually to the design elevation of the trench bottom, and the mileage pile shall be led to the trench bottom.

Strictly control the slope coefficient of trench excavation, excavate enough width according to the designed slope coefficient, pay attention to the soil condition of the trench during excavation, and ask the resident supervisor, Party A and design representative to determine the slope coefficient on site if necessary to prevent the collapse of the trench side

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