Construction method for reinforcing underground outer wall formwork in complex limited space in a foundation pit

Abstract

The invention relates to the field of building construction, in particular to a construction method for reinforcing an underground outer wall formwork in a complex limited space in a foundation pit. The construction method for reinforcing the underground outer wall formwork in the complex limited space in the foundation pit comprises the following steps of manufacturing a concrete prefabricated outer wall formwork, wherein the height is the floor height, grouting sleeves are arranged at the bottom, a plurality of bolts are pre-buried, and matched screw holes are formed in an inner side formwork; pre-burying a row of vertical steel bars on the outer side of an underground outer wall, wherein the distance of the vertical steel bars is consistent with the distance of the grouting sleeves; hoisting the prefabricated outer wall formwork, enabling the grouting sleeves to be aligned with raft vertical steel bars, adjusting the prefabricated outer wall formwork to be perpendicular to the horizontal plane, and fixing through an inclined support; conducting grouting through the grouting sleeves; binding concrete wall steel bars; dismantling the inclined support, erecting an inner side formwork, enabling the bolts to penetrate through the screw holes, and screwing the nuts for reinforcement; pouring a concrete wall body; and after final setting, dismantling the inner side formwork, then dismantling the exposed parts of the bolts, and repairing the surface of the concrete wall body. The construction method for reinforcing the underground outer wall formwork in the complex limited space in the foundation pit provided by the invention solves the problem that when an operation surface is insufficient, constructors cannot reinforce the underground outer wall structure formwork.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for strengthening an underground exterior wall formwork in a complex and limited space in a foundation pit. Background technique [0002] During the excavation of the building foundation pit, the construction work surface will be reserved to facilitate the construction of the underground exterior wall structure by the construction personnel. When the site is limited and the excavation sideline of the foundation pit is close to the structure side during the construction process of the underground structure, the construction work surface is very narrow, and the construction personnel cannot operate, and the original formwork support method cannot be used for construction, which will affect the construction progress. , at present, the common way to support the formwork of the underground external wall structure is to use the side wall of the foundation pit ...

AI Technical Summary

Problems solved by technology

When the site is limited and the excavation sideline of the foundation pit is close to the structure side during the construction process of the underground structure, the construction work surface is very narrow, and the construction personnel cannot operate, and the original formwork support method cannot be used for construction, which will affect the construction progress. , at present, the common way to support the formwork of the underground external wall structure is to use the side wall of the foundation pit as one side formwork, set the other side formwork on the inner side of the wall, and only strengthen the formwork on the inner side of the wall when strengthening the formwork, this method is adopted One is a waste of concrete, and the other is that if the reinforcement is not in place and the mold expands, it will be very troublesome to restore, which wastes both concrete and labor

Images