A method of using a positioning and steering control system for vertical lattice columns in deep foundation pit enclosure

Abstract

The invention discloses a positioning and steering control system of a deep foundation pit bracing vertical lattice column and an application method. The control system mainly comprises a positioning system, a steering system and an assisting adjusting system, wherein the positioning system comprises a positioning platform, a lattice column, a positioning timber pile, fastening screw rods and lengthening type nuts, the steering system comprises a guiding column, a steel reinforcement cage, a supporting and lifting corbel and a screw rod connecting corbel; the assisting adjusting system comprises a supporting and lifting carrying pole and an adjusting crowbar. The control system is used for placing the positioning platform to the group at the top of a pile opening after a hole is drilled in a pouring pile, enabling the guiding column to penetrate through the hole in the middle of the positioning platform to be inserted into the lattice column and the steel reinforcement cage which are integrally welded by binding eight reinforcing bars, and indirectly adjusting the elevation, the positioning and the steering of the lattice column on the ground through the utilization of meshing between the guiding column and the lattice column and the tight fixing of the fastening screw rods between the guiding column and the lattice column, so that the purpose of accurate control is realized.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a positioning and steering control system for a vertical lattice column in enclosure of a deep foundation pit and a use method thereof. Background technique [0002] In the design process of foundation pit enclosure, scheme comparison and selection is a very important work. The selected supporting structure should firstly have the feasibility of construction, and should be able to meet the restriction requirements of the foundation pit protection level on the foundation pit horizontal displacement and surface settlement determined according to the engineering environment. After technical and economical comparison, determine the final enclosure structure type, analyze various factors in the process of scheme comparison and selection, and determine a scientific and reasonable engineering scheme. [0003] The foundation pit enclosure structure mainly bears the wate...

AI Technical Summary

Problems solved by technology

In the southern soft soil area, due to the site requirements of mechanized construction, the foundation pit enclosure and pile foundation works are generally constructed on the ground, and when the support elevation is below the surface of the construction site, the corresponding lattice column tops are also below the surface at a certain depth. It is difficult to guarantee the construction accuracy of the positioning, elevation and steering of the lattice column by using the hanging bar to assist the construction technology

If the positioning or steering deviation of the lattice column is too large, the supporting steel bars will not be able to pass through the lattice column normally, which will bring great inconvenience to the construction. No matter how it is handled, it will bring additional cost investment and may also affect the total construction period

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