Concrete pouring method for steel plate waterstop strip in horizontal construction joints of exterior wall by upside-down method

Abstract

The invention relates to reverse-construction outer wall construction. A reverse-construction outer wall horizontal construction seam steel plate water-stop belt concrete casting method comprises the steps of during an upper plate outer wall formwork supporting stage, reserving holes at an interval with the horizontal distance being 2 to 3m on the bottom part of an outer wall formwork; manufacturing a three-side wood square box with a corresponding size and without inner and outer sides and a bottom side, filling the three-side wood square box into the bottom part of an upper plate outer wall formwork, and fixing the three-side wood square box and the outer formwork; during a lower plate outer wall formwork supporting stage, supporting a brake shoulder formwork on the periphery of each hole; the inner side of each brake shoulder formwork is 3 to 5cm far away from the side edge of each hole; after completing erecting the formworks, when casting a lower plate outer wall concrete from the holes, slantways flowing the concrete, cooperatively vibrating, and densely filling the concrete in spaces inside and outside a water-stop steel plate; local water-stop of each hole is realized through coating a water-stop glue or expanding a water-stop belt; and after the lower plate outer wall concrete achieves a certain solidification effect, disassembling the formworks, and completing upper and lower plate outer wall concrete horizontal construction seam steel plate water-stop belt construction. The reverse-construction outer wall horizontal construction seam steel plate water-stop belt concrete casting method provided by the invention is excellent in water-stop effect, and considerable in cost-saving.

Description

technical field [0001] The invention relates to the construction of an external wall by the reverse method, in particular to a construction method for the horizontal construction joint of the external wall by the reverse method. Background technique [0002] For the construction of underground works in the reverse method, if steel plate waterstops are used as the waterproof measures for the horizontal construction joints at the junction of the upper and lower slab walls, including before the formwork support of the lower slab wall, it is necessary to additionally set up a horizontal through-length brake shoulder as a pouring port for concrete , and the top surface of the brake shoulder should be higher than the top surface of the lower slab wall by a certain height to ensure a certain concrete pressure difference, and the lower concrete is "squeezed" into the outer side of the water-stop steel plate, so that the concrete and the water-stop steel plate work together to prevent...

AI Technical Summary

Problems solved by technology

During conventional process operation, due to space constraints, the vibrating rod cannot be inserted into the outer side of the water-stop steel plate for concrete vibration, and the pressure provided by the brake shoulder is higher than the top elevation of the next plate’s outer wall, making it difficult to fully press the concrete into the water-stop The outer side of the steel plate, the compactness of the outer concrete and the effective bonding effect with the water-stop steel plate are difficult to be guaranteed, which in turn affects the waterproof effect of the steel plate water-stop belt

Practical practice shows that the conventional water-stopping effect is not good