Check well nozzle installation

1、检查井井座与管道连接安装顺序，应先从接户管上游段开始安装，以井-管-井-管顺序安装，并逐渐向下游支管，干管延伸。

1. The installation order of the connection between the well and the pipe should first be installed from the upstream section of the household pipe, which is installed in the order of well tube - well - tube, and gradually extends to the downstream branch pipe and the dry pipe.

2、井座接头与管道连接施工方法，应与同类型接头的管道连接的施工方法一致。

2. The construction method of connection between the well seat and the pipe should be consistent with the construction method of the connection of the same type of joint.

3、井座与汇入管，排出管连接需要变径，采用异径接头时，当汇入管径小于井座接口管径时，应管顶平接；井座排出管接口大于下游管道时，应管内底平接。

3, well seat and remittance pipe, discharge pipe connection need variable diameter, when using different diameter joints, when the inlet pipe diameter is less than the caliper interface pipe diameter, the top of the pipe should be flat connected; when the outlet pipe interface of the shaft is larger than the downstream pipe, the inner bottom of the pipe should be flat.

4、管道采用可变角接头或球形接头调整坡度时，当其管径为315mm,应采用专用工具，不得使用链条扳手。

4. When the pipe adopts variable angle joint or spherical joint to adjust the slope, when the pipe diameter is 315mm, special tools should be used and chain wrenches should not be used.

5、附加接头的安装，应根据井筒尺寸和连接管道的直径，采用专用工具在井壁上开孔，孔洞圆周边缘应平整，安装附加接头不得倒坡。

5. The installation of additional joint should be based on the size of the wellbore and the diameter of the connecting pipe, using special tools to open the hole on the wall of the well, the circumferential edge of the hole should be flat, and the additional joint can not be inverted.

6、在地下水位较高或雨季施工期间，在管道（含检查井）安装完成（但尚未进行灌水试验）时，应采取防止井体上浮的技术措施。

6. During the high water level or during the rainy season, the technical measures should be taken to prevent the floatation of the well when the installation of the pipeline (including the inspection well) is completed (but the irrigation test has not been carried out).

井筒安装

Wellbore installation

1、井筒的长度应为井座连接井筒的承口底部至设计地面的高度，再减去井筒顶至地面的净距。当地面或路面标高难以精确确定时，井筒长度可适当预留余量。

1, the length of the wellbore should be the height of the bottom of the well connecting the wellbore to the design ground, and the net clearance from the top of the wellbore to the ground. When the elevation of the ground or road is difficult to determine accurately, the length of the shaft can be properly reserved.

2、井筒插入井座应保持垂直。井筒插接时，不得使用重锤敲打，应采用专用收紧工具。

2, the shaft inserting well should be kept vertical. When the shaft is inserted, no heavy hammer should be used for percussion, and special tightening tools shall be used.