Waterproof construction method for through-wall pipeline of cut-and-cover subway station

Abstract

The invention discloses a waterproof construction method for a through-wall pipeline of a cut-and-cover subway station. The construction method is characterized by comprising the following specific construction steps that (1) a non-woven waterproof additional layer is arranged in the joining portion of the upstream side of the through-wall pipeline and a structural wall; (2) a spraying material ofliquid rubber is sprayed till thickness of liquid rubber reaches 1.5mm; (3) a high-density polyethylene sheet material with thickness being 0.5mm is laid in the exterior; (4) waterproof mortar is firstly used on the downstream side so that blocking is conducted; and (5) an infiltrated crystalline waterproof agent is sprayed on the downstream side. The construction method for the through-wall pipeline of the cut-and-cover subway station has the beneficial effects that joint waterproofing is laid emphasis on; a waterproof layer is supplemented so that waterproofing is enhanced; and structural use requirements are satisfied. Self-waterproofing capacity of reinforced concrete structures should be guaranteed by structural self-waterproofing; and meanwhile, effective technical measures should be adopted so that waterproof concrete is guaranteed to reach prescribed compactness, anti-permeability, cracking resistance, corrosivity resistance and durability. Waterproof materials are optimized;waterproof designs of detailed portions are optimized; and the waterproof effect is guaranteed to be reliable.

Description

technical field [0001] The invention belongs to the technical field of waterproof construction, and in particular relates to a waterproof construction method for a wall-piercing pipeline of a subway open-cut station. Background technique [0002] In subway construction, waterproofing is an important aspect involving engineering firmness and durability. Groundwater leakage will cause serious damage to the concrete structure, cause corrosion of steel bars, and directly affect the bearing capacity of the structure. The humid environment will also cause potential safety hazards for the internal power supply lines of the subway, which will affect the operation and maintenance of the subway. The plugging and maintenance after the leakage increases the operating cost of the subway, and also affects the normal operation of the subway. At present, most of the subway stations in my country have different degrees of water leakage. A subway in the south has not yet been operated, and ...

AI Technical Summary

Problems solved by technology

[0003] In construction, there must be weak links such as construction joints, pre-embedded pipe fittings, deformation joints and post-pouring belts. Due to the limitations of the construction of waterproof membranes, materials such as grouting, sealant, and waterstops are generally used for waterproofing measures on the water-facing surface. , and there is no corresponding preventive treatment on the back surface. Due to the influence of factors such as time, environment and geological conditions on the structure, these details are easily deformed. Will cause waterproof measures to fail