Ground wall embedded slideway type steel support foundation pit supporting system and construction method thereof

Abstract

The invention discloses a ground wall pre-buried slideway type steel support foundation pit supporting system and a construction method thereof. The supporting system comprises a pre-buried slideway (1), a fixing bolt (2) and a steel support (4). The embedded slide way is installed on a reinforcement cage (3) of a ground wall (31) in an embedded mode, and the embedded slide way is arranged along the supporting position of the steel support; notches of the pre-buried slideways on the ground walls on the two sides of the foundation pit are oppositely arranged, so that the two ends of the steel support can be inserted into the pre-buried slideways through the notches respectively, and the steel support can slide along the pre-buried slideways; a plurality of bolt holes are formed in the pre-buried slide way, bolt holes are formed in the two ends of the steel support, and the fixing bolts penetrate through the pre-buried slide way and the steel support through the bolt holes, so that the end of the steel support is fixed in the pre-buried slide way through the fixing bolts. All the steel supports are placed through the pre-buried sliding ways, and the problem that follow-up support hoisting is affected by cross operation conflicts, steel support stacking and loading and dense supports on a construction site can be effectively solved.

Description

technical field [0001] The invention relates to a foundation pit support system and a construction method thereof, in particular to a ground wall pre-buried slideway type steel support foundation pit support system and a construction method thereof. Background technique [0002] After the pile foundation construction is completed, the excavation stage of the foundation pit is entered. With the continuous development of the underground space, the depth of the foundation pit is getting deeper and deeper, and multiple supports need to be set in the foundation pit. In the construction of a foundation pit, a total of six supports are set up, one and three of which are concrete supports, and the remaining four are steel supports. During the construction of the standard section on the west side, because the houses on the south side of the foundation pit have not been demolished, the construction road on site has only one road on the north side. , Steel support installation, steel ...

AI Technical Summary

Problems solved by technology

[0003] At present, the steel support in actual use is relatively fixed in form. It needs steel support to enter the site, carry out stacking on the side of the site, pre-assemble the truck crane or crawler crane, and then carry out hoisting, and the troubles caused by it are due to reasons such as the site and the environment. Troubled, resulting in more cross operations on site, steel support installation and dismantling and foundation pit excavation construction cannot be continuously operated, affecting the construction period, and resulting in a long exposure time for foundation pit excavation and empty warehouses, and even causing foundation pit deformation monitoring and alarms, seriously affecting the foundation pit stability

At the same time, during the construction of steel supports, with the increase of excavation depth, the upper supports become more and more dense, the installation of lower steel supports becomes more difficult, and the efficiency decreases. High constructions are not allowed, such as pump trucks, truck cranes, etc. Gantry cranes are used for on-site high-voltage line construction. Except for the first support, the rest of the high-voltage line supports are steel supports. The rail-mounted gantry crane only supports movement in the north-south direction. Therefore, when the steel support is installed under the high-voltage line, it cannot be turned during the hoisting process, which causes great difficulties in the installation of the steel support. As the depth increases, the efficiency is greatly reduced

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