Retaining the construction technology of welded waterstop flange in the middle of the crd

Abstract

The construction technology of adding welding water-stop flanges to the next door in the underground excavation "CRD" belongs to the field of subway construction. During the construction of the second lining, the I-beam on the middle and next wall of the underground excavation tunnel is temporarily reserved, and the water-stop flange is welded within the range of the second lining on the top and bottom of the I-beam, and the top of the I-beam on the middle and next wall is welded with a water-stop flange, and the water-stop flange is divided into two parts. The steel plate is processed and butt-jointed, and then welded tightly with the I-beam; after the welding is completed, the upper part of the water-stop flange is coated with water-swelling water-stop glue, and the water-stop glue is applied around the I-beam next to the temporary middle wall for a week; the waterproof plate is " The L" shape is laid upward along the bottom of the I-beam of the temporary middle wall, and the waterproof board and the I-beam of the middle wall are firmly pasted with adhesive tape; the corner between the bottom of the I-beam of the temporary middle wall and the "L"-shaped waterproof board is filled There is waterproof mortar, and the waterproof board and waterproof mortar are pasted with adhesive tape; the upper and outer sides of the waterproof board are tightened with metal hoops. The invention improves the integrality of the waterproof board, makes the waterproof effect better, speeds up the construction progress, and reduces the construction cost.

Description

technical field [0001] The invention relates to a construction technique for water-proof treatment of a temporary intermediate partition in the construction of a "CRD" large section. Background technique [0002] With the continuous improvement of subway construction technology, the underground engineering field has continued to innovate, and many construction methods for shallow burial and underground excavation have been proposed. Among them, the CRD construction method of "dividing the whole into parts" is a very representative construction method, also known as "cross-middle". Next door method". This method takes the pre-reinforcement (treatment) of the ground as the premise, and is based on the anchor and net spraying support. The settlement and convergence of the vault of the supporting structure ensure the safety of the excavated chamber and the ground buildings. Compared with the open-cut method and the cover-build method, the biggest advantage of the shallow-burie...

AI Technical Summary

Problems solved by technology

However, when the second lining is constructed to remove the temporary middle partition, the process is complicated, and it is easy to cause large ground and pipeline settlement

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