1. Concrete lining is an important link to ensure the safety of tunnel construction, and excavation must follow closely. If the quality of stone changes, the specified cycle length can be shortened if necessary, and the technical requirements for concrete summer-planting and water leakage prevention should be well met to ensure construction safety.
2. The steel arch represents the role of temporary support. In the process of pouring concrete, the stress should be observed at any time to prevent the collapse of the rock layer at the top of the rock or the stress deformation of the arch so as to take strain measures. In the process of pouring, the temporary support should be removed while pouring, and it can't be poured again by refraction, which will make the arch out of balance, deform the surrounding rock and cause accidental collapse.
3. Before formwork erection, it is necessary to check whether the last concrete cutting and water stop position are correct, and write down the number of the first formwork position. When individual arches do not conform to the requirements, adjustments should be made. Internal and external supports should be firm, and joints should be attached tightly to prevent secondary pouring from forming interlayer or slurry leakage, so as to ensure that the concrete surface is smooth and the joints are unified and beautiful after formwork removal.
4. Operators of electric vibrators used in concrete pouring should be basically fixed and trained. It is required to wear protective articles such as insulating gloves and shoes to prevent electric shock. The power supply and wires of the motor should be checked by designated personnel, and it is forbidden to check during operation.
5. Do a good job in handling construction joints, especially when there is a large area of pollution before the back cover. Be sure to strictly control the process of chiseling, and carefully operate it to ensure that the pressure test is watertight, the water is safe at one time, and the joints are watertight.
6. Whether the concrete is dense, there will be no peaks and pits, and the pits are an important process to ensure the strength of the water diversion project. It is necessary to carry out registration and listing, with special personnel for operation and responsibility, constantly explore and master positive practical experience, improve construction technology, boldly innovate, constantly tackle key problems and improve quality.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd