Inflatable adjustable type construction mold for reserved hole in concrete structure plate, and construction method

Abstract

The invention discloses an inflatable adjustable type construction mold for a reserved hole in a concrete structure plate, and a construction method. The mold comprises a cylinder formed by rolling of a rectangular iron sheet, a circular cover plate for plugging an upper end opening of the cylinder, and an inflatable air bag placed in the cylinder, wherein the cylinder is vertically arranged, and the outer diameter of the cylinder is the same as the hole diameter of the reserved hole needing to be constructed in the concrete structure plate; the inflatable air bag is a cylindrical air bag, and the inflatable air bag and the cylinder are coaxially arranged; and the bottom of the cylinder is supported on a shaping template of the concrete structure plate, the cylinder and the circular cover plate form an outer sleeve, and an outer sleeve fixing piece for fixing the outer sleeve is arranged on the shaping template. The construction method comprises the following steps of I, erecting the shaping template; II, performing measurement and paying-off; III, mounting the mold; IV, casting concrete; and V, dismantling the mold. The inflatable adjustable type construction mold disclosed by the invention is reasonable in design, simple and convenient to mount and dismantle, and good in use effects; after concrete is finally coagulated, the mold is dismantled, so that the quality of the constructed and shaped reserved hole can be effectively guaranteed, and the accuracy of the position of the reserved hole can be guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction mold and a construction method for a reserved hole in an inflatable adjustable concrete structural board. Background technique [0002] According to "Building Water Supply and Drainage and Heating Engineering Construction Technology Standard" DBJ / T61-38-2005J10701-2006, "Building Water Supply and Drainage and Heating Engineering Construction Quality Acceptance Code" requirements, the location and size of the reserved holes for concrete slab pipeline installation should be accurate Meet the design requirements. Among them, the deviation of the centerline displacement of the reserved hole is not more than 2mm. In addition, during the actual construction, the remaining hole construction mold must not leak or seep, and after the reserved hole mold is pulled out, there is no defect around the reserved hole. Therefore, in the construction process o...

AI Technical Summary

Problems solved by technology

Among them, when U-PVC hard plastic pipe and simple steel cylinder are used as the mold for reserved holes, iron nails need to be nailed into the forming template of the cast-in-place concrete slab, and iron wires and U-PVC hard plastic pipe or simple The steel cylinder is bound and fixed; after the formwork is removed, the iron wires around the hole and the iron nails left in the concrete need to be removed. However, due to various reasons such as construction, the iron nails often cannot be completely removed. Rust exists for a long time, affecting the quality of concrete finishes

In addition, when U-PVC rigid plastic pipes are used as molds for reserved holes, during the concrete pouring process and the follow-up construction process before the mold is removed, it is easy to cause damage to the mold, which cannot be used again, wastes materials, and increases project costs.

However, when foam boards, bricks, etc. are used as molds for reserved holes, the molds will inevitably be displaced and deformed due to collisions during pouring concrete, and the accuracy of the reserved holes cannot be guaranteed, and foam boards will be damaged when they are removed. A lot of foam particles are produced, which affects the quality of concrete and pollutes the environment; while the demolition of bricks is time-consuming and labor-intensive, and will generate construction waste, and the falling waste is likely to cause injury to the construction personnel below the hole, which poses a great safety hazard

[0004] In addition, during the construction process of the above-mentioned existing reserved hole construction mold, the mold is easy to loosen during concrete pouring, and the accuracy is poor, and the construction quality of the reserved hole is poor, and the construction quality is difficult to guarantee; It must be pulled out in front of it, so a special person is required to wait for it. If it is not pulled out in time, mold inlays will occur, and it will need to be removed by chiseling, resulting in waste of labor and materials, and affecting the construction quality of the project. Avoid damage to the structural slab, such as quality defects such as concrete cracks around the reserved opening

If U-PVC hard plastic pipes are used for the construction of reserved holes, they are basically for one-time use. To improve the reuse rate of U-PVC hard plastic pipes, they must be pulled out before the initial setting of the concrete, subject to the construction progress. The pull-out time may be at night. For projects constructed in winter, the nighttime temperature is cold, the operating environment is harsh, and when the concrete is initially set, it is easy to step on the concrete when walking on the structural slab, resulting in quality defects such as cracking of the concrete around the reserved opening. The late waterproof construction leaves quality problems; moreover, the U-PVC hard plastic pipe cannot be pulled out after the initial setting of the concrete, and must be removed before it can be taken out, causing damage to the concrete around the hole

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