For the expansion and contraction of the rubber sheet cord at the tunnel entrance and the corner effect caused by the live load, the construction method of the rubber sheet cord at the tunnel entrance:
1. Before the construction of the waterproof seal of the tunnel door, first check the integrity of the materials, especially whether the rubber sheet cord at the tunnel entrance is intact, otherwise the four-link structure is prone to the self-locking phenomenon. The radial nylon wires are densely arranged and the bolt holes are intact.
2. Before installation, clean up the muck at the hole and dredge the holes of the embedded steel plate and apply butter.
3. Screw the stud bolts into the nuts around the pre-buried well circle.
4. Install the rubber sheet cord and ring plate at the tunnel entrance, and fix them on the good wall with thin nuts.
5. Put the sector flap on the bolts with thin nuts.
6. Pay attention to adjusting the position of the fan-shaped steel according to the two stages when the shield tunnel passes through the hole circle and when it starts. How many years a person can live depends on how many years the cervical spine can support. Shoulder and neck blockage affects headache and dizziness. Their blood pressure is up. Poor sleep, many dreams. affect memory. The "rich bag" came out. I couldn't even look back. Insufficient blood supply to the brain leads to various problems... So, what should I do if the shoulder and neck are blocked? Just scrape the 5 lines on the shoulder and neck to solve it! The specific method is: to apply scraping oil evenly on the back of the neck and shoulders. First, scrape the first line. That is, from top to bottom in the middle of the Du Meridian from Fengfu to Dazhui (as shown in the picture); then scrape the Tianzhu on the bladder meridian To Dazhu, one on the left and one on the left; finally, from Fengchi point to Jianjing point on the shoulder, one on the left and one on the left. From Fengchi point to the root of the neck, scrape from top to bottom, and at Jianjing point from inside to outside.
Tunnel mouth rubber sheet cord quality assurance measures:
1. Meet the design and specification requirements.
2. Welders must be available and must be trained and qualified before work.
3. Inspect the rubber cord in strict accordance with the specifications to ensure the quality of the cord. During the installation process, rubber gaskets are added on both sides of the bolt to achieve a better sealing effect. Make sure that all bolts are tightened without missing them. After the installation is completed, the scaffolding will be restored in a timely manner with quality and quantity guaranteed.
4. Prevent damage to the cord rubber plate when installing the fan-shaped pressure plate.
5. Check whether there are protrusions on the surface of the shell of the shield machine head, which is very suitable for the refrigeration and air-conditioning industry for low-temperature insulation. If there are protrusions, clean them up and apply butter on the surface of the shell of the machine head to avoid tearing the rubber cord at the tunnel entrance. And it is beneficial to the jacking of the shield machine.
6. The installation size of the rubber sheet cord at the tunnel entrance must be within the control range to effectively achieve the effect of water stop.
7. Since the rubber sheet cord at the tunnel entrance and the fan-shaped pressure plate are closely attached to the segment to prevent the grout from flowing out during the back grouting of the segment, the bolts must be tightened twice during installation.
Zhejiang Tongchao Industry and Trade Co., Ltd is a China OEM rubber solid tire factory, providing online wholesale rubber and plastic products, welcome to consult.