Horizontal supporting system and construction method thereof

Abstract

The invention discloses a horizontal supporting system. The horizontal supporting system comprises a fish belly sill and a horizontal beam; the fish belly sill comprises a waist beam and a supporting frame set installed on the waist beam, the supporting frame set comprises a plurality of supporting frames, and force bearing pieces and inhaul cable frames are installed on the supporting frames; the two sides of the supporting frame set are each provided with a horizontal beam installed on the waist beam; and a middle inhaul cable is connected between every two adjacent inhaul cable frames, and side inhaul cables are connected between the horizontal beams and the inhaul cable frames. A first force maintaining box and a first jack are arranged between the force bearing piece and the inhaul cable frame, and the first jack is used for tensioning the middle inhaul cable and the side inhaul cables to generate prestress. The invention further discloses a construction method of the horizontal supporting system. The horizontal beam and the fish belly sill are integrated through the waist beam, prestress is mainly concentrated on the inhaul cable, deformation of the waist beam is reduced, the fish belly sill can provide larger reaction force under little deformation, deformation of the side wall of a foundation pit is reduced, and safety of foundation pit construction is improved.

Description

technical field [0001] The invention relates to a horizontal support system and a construction method thereof. Background technique [0002] The fish-belly beam is a kind of support inside the foundation pit, which is used to excavate the foundation pit with a large area. During the installation process of the fish-belly beam, a cable runs through the whole fish-belly beam, and tensions Pull to make the anchor cable produce prestress. Since the stay cable runs through the entire fish-belly beam, when the two ends of the stay cable are stretched, due to the effect of friction, the support rod of the stay cable is likely to bend, resulting in the instability of the fish-belly beam structure. [0003] At present, since the fish-belly beam is directly installed on the support piles at the edge of the foundation pit, the waist beam will be bent and deformed during the tensioning process of the cables, and the two ends of the waist beam will bend outwards, so that the two ends of...

AI Technical Summary

Problems solved by technology

[0004]In addition, when the existing fish-belly beam is installed, the overall hoisting method is mainly adopted. The weight of the fish-belly beam reaches 20-30 tons. When hoisting the fish-belly beam, Large-scale hoisting equipment is required, and a special hoisting platform needs to be set up on the edge of the foundation pit, and the hoisting platform must be repaired and hardened, which makes the installation cost of fish-belly beams higher, and also increases the construction cost of the foundation pit

Images