Method for rigid waterproof construction of beam and slab type basement

Abstract

The invention discloses a method for the rigid waterproof construction of a beam and slab type basement, and belongs to the technical field of basement waterproof construction. The method comprises the following steps: (1) wetting the clean and even surface of a concrete base layer; (2) uniformly mixing clean water and a cementitious capillary crystalline waterproof coating according to a weight ratio of 0.3:1 to prepare mortar, and strictly keeping the mixing process finished within 20 minutes; calculating the total amount of the mortar for a preset construction area according to 1.4 kg / m<2>; using a hair brush or a nylon brush to brush the mortar on the wetted surface of the concrete base layer uniformly and reciprocally or using a spray gun to spray mortar uniformly till the motor is used up; during brushing or spray painting, strictly keeping the temperature above 4 DEG C; and (4) 3 to 4 hours after the final set of the mortar, performing spray type water sprinkling for maintenance 3 to 5 times each day, successively for 2 to 3 days. The method improves the waterproof performance of the floor and wall surfaces of the basement.

Description

technical field

[0001] The invention discloses a rigid waterproof construction method for a beam-slab type basement, which belongs to the technical field of basement waterproof construction. Background technique

[0002] In recent years, with the development of the city, a large number of high-rise buildings have been built, and the buildings in the urban area have become increasingly dense. Due to the requirements of using functions and developing underground space, high-rise buildings are generally designed with a basement with a larger plane size and depth. However, due to the special environment in which the basement is located, there are strict requirements for its waterproof, impermeability, crack resistance, etc., especially in Jiangsu and Zhejiang areas, where the water level is relatively high. According to the first-level waterproof requirements of underground engineering, rigid waterproofing and two flexible waterproofing also generally cause leakage, and once the...