Tool-type suspension staircase for deep foundation pit

Abstract

The invention discloses a tool-type suspension staircase for a deep foundation pit. The tool-type suspension staircase comprises a ladder assembly, a ladder assembly supporting seat and a staircase body, wherein the ladder assembly consists of two groups of ladder assembly units, a gap for installing the staircase body is arranged between the two groups of ladder assembly units, each group of ladder assembly unit comprises four stand columns, the cross section of each ladder assembly unit is in a rectangular shape, the upper end of each stand column is perpendicularly and fixedly connected with a steel beam above the stand column, and the lower end of each stand column perpendicularly stretches to the bottom surface of the foundation pit; the ladder assembly supporting seat is fixedly connected with a foundation pit enclosure, the ladder assembly supporting seat comprises two or four steel beams, and the steel beams are fixed on the upper surface of a crown beam of the enclosure structure; the staircase body is installed between the two groups of ladder assembly units from top to bottom in sequence, a corner between two adjacent staircase bodies is provided with a resting platform, and the resting platform is fixed in the internal space of the ladder assembly units. The staircase has a suspension characteristic and is installed from top to bottom, so that the staircase can be tightly combined with the procedure of the foundation pit project; the staircase is convenient for construction personnel to pass, high is safety, high in disassembling and installation speed and high in circulation rate.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and relates to a staircase used for safety protection on a construction site, in particular to a tool-type staircase suspended in a deep foundation pit. Background technique [0002] A foundation pit is a soil pit excavated at the base design position according to the base elevation and the size of the base plane. A building foundation pit refers to the space below the ground that is excavated for the construction of the foundation and basement of a building (including structures). The foundation pit is a temporary project, and its function is to provide a space so that the foundation masonry work can be carried out according to the position specified by the design. According to the Ministry of Construction's Jianzhi No. 200987 document on the issuance of the "Notice on the Safety Management Measures for Sub-item Projects with Greater Risk", general deep foundation pits refer to...

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Problems solved by technology

[0011] It should be pointed out that although the stairs involved in the above-mentioned patents have improved the existing deep foundation pit stairs, the design of the stairs is still not reasonable enough to meet the traffic requirements of different construction areas or stages of deep foundation pit engineering; The installation is from bottom to top, which is inconsistent with the deep foundation pit earthwork excavation process, and cannot be completely combined with the foundation pit earthwork excavation, slope support and subsequent structural construction procedures

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