A kind of precast water-stop and post-settlement of foundation floor

Abstract

The invention discloses an advancing waterstop sedimentation post-cast strip of a foundation slab. The advancing waterstop sedimentation post-cast strip of the foundation slab is characterized in that an advancing waterstop water-proof construction member is of an integral structure, a right angle type expansion joint is formed between the advancing waterstop water-proof construction member and the foundation slab, two side surfaces of the expansion joint are provided with steel moulding plates with reserved reinforcing steel bar holes; the horizontal extension joint is hollow, and the vertical extension joint is filled with waterstop caulking objects; the junctions of the extension joints and a foundation bed are provided with stainless steel waterstop strips; the junction of the advancing waterstop water-proof construction member and the post-cast strip is poured with a cement mortar screeding layer which is coated with flexible water-proof paint. The sedimentation post-cast strip has the advantages that the extension joints are changed into two right angle extension joints from a single vertical extension joint, so that a water permeation route is long; the advancing waterstop water-proof construction member has the advantages of small crack spreading range and good differential settlement control effect; the stainless steel waterstop strips can carry out tensile deformation along with sedimentation and have a corrosion resistant function; the downstream face resists water by using the flexible water-proof paint, the problem of water-proof invalidation caused by that a flexible water-proof layer of the downstream face can be easily peeled off can be solved; the steel moulding plates with the reserved reinforcing steel bar holes are used as dismounting-free moulding plates, and construction progress and quality can be improved.

Description

technical field [0001] The invention relates to the construction technology of building engineering, in particular to a foundation bottom slab pouring belt after advanced water stop and settlement. Background technique [0002] In construction engineering, since the retention time of the post-cast belt is generally long, when the foundation of the building is below the groundwater level, the traditional post-cast belt method is used. The post-cast belt must be poured after the construction of the main structure is completed. . This requires continuous precipitation during the construction of the main body to ensure that the groundwater remains below the foundation, and the precipitation cannot be stopped until the main structure is completed and the concrete is poured. [0003] The adverse effects caused by setting the post-pouring belt are: 1. Due to the long-term continuous precipitation, the energy consumption is large, which increases the project cost; 2. The foundation...

AI Technical Summary

Problems solved by technology

[0005] 1. During the construction of this location, in order to solve the problem of difficult removal of the membrane at the lower part of the waterstop, some construction units sometimes directly use the installed wood fiber asphalt board as a formwork, and do not dismantle it later. Its compression is very large and cannot meet the foundation The waterproof layer of the bottom plate is required to be lined, so that the waterproof layer is subjected to continuous tension under the pressure of water for a long time to produce creep

[0006] 2. During the construction process, due to the poor fixation of the rubber waterstop, it is easy to shift and be cracked when pouring concrete; resulting in leakage of water from the advanced waterstop, which has an adverse effect on the waterproofing of the post-casting belt , will affect building safety in severe cases

[0008] 4. There is a single vertical expansion joint in the advanced waterstop, and the differential settlement is likely to cause its damage, resulting in the failure of the post-waterstop poured belt

The post-settlement poured belt of this structure only replaces the rubber waterstop in the expansion joint of the above-mentioned post-settlement poured belt with a water-stop steel plate, which solves the problem of water leakage from the advanced waterstop caused by the easy deformation of the rubber waterstop, but it still cannot solve the problem. When the differential load on both sides is large, the crack will expand (only the ability to withstand differential load is improved)

In addition, the polystyrene foam plastic boards in the vertical expansion joints of the post-settlement pouring belt are not strong enough and are easily deformed during construction, resulting in water leakage from the advanced waterstop and affecting the waterproof function of the post-casting belt.

Images