What are the installation steps of water stop screws in underground pipe gallery?

Hello, the installation steps of underground pipe gallery water stop screw are as follows:

1. First, hang the formwork of the angle of Yin and Yang to the construction site to make it in place; According to the installation sequence of transverse wall first and then longitudinal wall, assemble the floor plan number, hoist the template to the installation site in turn, and adjust the template in place according to the wall line with a crowbar. Install the water stop screw, symmetrically adjust the template and the anchor screw, adjust the verticality of the template with the help of the template support auxiliary line with magnetic field lines, hang the line to adjust the top of the template, and then tighten the anchor screw and the water stop screw;

2. Installation of external formwork: put the formwork on the metal triangular platform frame, put the formwork in place, tighten and correct the water stop screw, and pay attention to the tight, firm and reliable joints at the construction joints to prevent dislocation and slurry leakage. Check whether the joints between corner formwork and wall formwork and between corner formwork and wall formwork are tight. If not, fill the gap with foam sponge to make it tight to prevent slurry leakage and dislocation.

3. Before shuttering in the underground pipe gallery shaft, the working platform should be hoisted into the elevator shaft. The primary and secondary keels and steel legs of the working platform are made of 10# channel steel, and the keel spacing is&; lt； 600mm, and fixed by welding, and then spread 5cm thick boards. After the platform is in place, adjust the four corners to make the platform in a horizontal state. Hoist into the cylinder mould, open the mould according to the axis, correct the verticality and tighten the water stop screw.

4. After all formwork installation and adjustment are completed, the formwork project shall be previewed before concrete pouring. The triangular supports of the large formwork are symmetrically distributed on both sides of the formwork. At the joint of large formwork, there should be no less than 5 water stop screws; The connection between the external formwork and the large formwork shall be no less than 5 water stop screws; When the internal angle die is equilateral, it should be connected with the big formwork obliquely at least three times, and each side of the unequal angle die should be connected with the big formwork screw at least five times. At the junction of formwork and large formwork at the corner of Yin and Yang, in order to prevent concrete from being staggered, steel bars should be added to support the tongue-and-groove in the formwork.

I hope the above can help you, thank you.