A method for forming concrete holes without support and without demolition

Abstract

The invention discloses an unsupported disassembly-free concrete hole forming method. The method comprises the following steps: carrying out on-site lofting on the size of a concrete hole according toa design drawing and a concrete pouring construction condition; simply reinforcing a thermal insulation material according to the field setting-out size in combination with the thickness of the thermal insulation material under the condition of not occupying the boundary line of the hole size structure; setting out the size of a water outlet bag according to the actual size of the concrete hole,and laying the water outlet bag into the hole thermal insulation material; arranging a plurality of refrigeration instruments in the water bag in the hole thermal preservation material, introducing water into the water bag to a certain volume, starting refrigeration equipment, and refrigerating water in the water bag to be in an icing state through the refrigeration instruments in the water bag; according to the concrete construction progress outside the hole, slowly filling the remaining volume of the water bag with water, and gradually filling full the water bag to ensure that the icing bodydoes not occupy the boundary line of the hole size structure; and after the concrete around the holes reaches the mold stripping age, shutting down the freezing equipment, the ice gradually melting into water, and taking out the thermal preservation material.

Description

Technical field[0001]The invention relates to the technical field of concrete construction, in particular to a method for forming concrete holes without support and without disassembly.Background technique[0002]In many concrete projects, in order to meet the requirements for the passage and maintenance of personnel, vehicles, equipment, etc., many types of concrete holes, such as corridors, elevator shafts, water collection wells, stairwells, cable wells, and drainage holes, are arranged inside the concrete. Most of the forming uses bulk wood formwork + steel formwork and support truss for construction. Although it meets the requirements of concrete construction and hole structure formation to a certain extent, due to the complex patchwork of bulk wood formwork + steel formwork, the processing of support truss is complicated, and the hole It is difficult to use large-scale mechanical auxiliary construction in such small areas as manual reinforcement. This not only increases human re...

AI Technical Summary

Problems solved by technology

[0002] In many concrete projects, in order to meet the requirements of passage and maintenance of personnel, vehicles and equipment, many types of concrete holes such as corridors, elevator shafts, water collection wells, stairwells, cable wells, drainage holes, etc. are arranged inside the concrete. Most of the forming is carried out with bulk wood formwork + steel formwork and support truss. Although it meets the requirements of concrete construction and hole structure forming to a certain extent, due to the complicated assembly of bulk wood formwork + steel formwork and the complicated processing of support truss, It is difficult to use large-scale machinery to assist construction in such narrow areas, and basically rely on manual formwork reinforcement, which not only increases human resource investment, labor intensity and safety risks, but also has different properties of different formwork and support materials, resulting in uncoordinated deformation and affecting concrete holes. Forming quality, more importantly, seriously restricts the speed of concrete construction and affects the construction period