Construction method of composite unilateral formwork deep foundation pit basement exterior wall

Abstract

The invention relates to a construction method of a composite unilateral formwork deep foundation pit basement exterior wall. The construction method comprises the steps of: firstly, a composite waterproof layer of the deep foundation pit basement exterior wall is adopted for waterproof treatment of the basement exterior wall; secondly, a basement bottom plate and an outer wall guide wall are poured; thirdly, aiming at different working conditions with limited fertilizer tank space, three different unilateral formwork systems are adopted for carrying out unilateral formwork on the basement exterior wall, and each unilateral formwork system comprises an exterior wall frame opposite-supporting unilateral formwork system, an exterior wall steel pipe fastener inclined-supporting unilateral formwork system and an exterior wall profile steel support inclined-supporting unilateral formwork system; and fourthly, a basement exterior wall is poured. The method the following beneficial effects: aprotection wall adopts segmented prefabricated hoisting rear tenon type waterproof inserting connection to replace a traditional masonry or cast-in-place concrete structure; the construction efficiency is high, and the waterproof performance is good; and meanwhile, adjustable pull-connection pieces connected with the prefabricated protection wall sections are pre-buried in the foundation pit enclosure structure, so that the perpendicularity of the prefabricated protection wall sections is guaranteed, and the construction quality is high.

Description

technical field [0001] The invention belongs to the technical field of house building construction, and in particular relates to a construction method for a basement exterior wall of a deep foundation pit with composite single-side formwork. Background technique [0002] In conventional basement exterior wall formwork construction, double-sided formwork with opposite-drawing screws is often used. However, the utilization rate of the construction site is getting higher and higher, which leads to the distance between the skin of the new building and the existing buildings and facilities. Construction measures have to be adopted during construction to meet the requirements of underground construction, such as vertical retaining walls, reducing the width of fertilizer tanks, etc. When the construction work area is narrow and the space requirements for personnel construction cannot be met, the normal wall double-sided support formwork, and the construction process of reinforcing...

AI Technical Summary

Problems solved by technology

[0003] In the limited fertilizer tank space, affected by the complex working conditions on site, there are mainly the following problems in the construction of the basement exterior wall based on one-sided support formwork: (1) Due to the small width of the fertilizer tank, the basement exterior wall and the foundation pit The space at the edge is small, and the waterproof construction space of the external wall is limited. The external anti-corrosion method cannot be used to ensure the concrete quality of the basement external wall, and the existing protective wall usually adopts traditional brick masonry or cast-in-place concrete technology, and the construction efficiency remains to be seen. (2) One side of the formwork on the outer wall is often suspended on one side. If the support measures are improper or the formwork system is unstable, it is easy to cause accidents such as formwork runaway, mold explosion or even formwork collapse; (3) the existing single side support Formwork technology often adopts on-site assembly, the workload of formwork installation and disassembly is large, and the scope of application has certain limitations

Images