Prestress connecting device of small-diameter pipe roofing structure and construction method of prestress connecting device

Abstract

The invention relates to a prestress connecting device of a small-diameter pipe roofing structure. The prestress connecting device of a small-diameter pipe roofing structure comprises a bearing platform plate, and bearing platform rollers which move in a guide groove in a steel pipe are correspondingly connected to the two sides of the bottom of the bearing platform plate; a gear track is arranged in the transverse direction of the bearing platform plate; a walking motor is arranged on the gear track, a gear is connected to a driving shaft of the walking motor, the gear meshes with a tooth groove in the gear track, an opening and closing motor is arranged on the gear track, and a fastener used for grasping or loosening a steel cable is connected to the driving end of the opening and closing motor. The prestress connecting device matched with the small-diameter pipe roofing is adopted, steel cables sequentially penetrate through the multiple roofing pipes, prestress is applied, and the difficulty that transverse prestress cannot be applied due to the fact that the internal space of the roofing pipes is limited is overcome; and by arranging the multiple prestressed steel cables for transverse connection and taking measures such as curtain pipe grouting, the transverse rigidity and integrity of the pipe curtain structure can be effectively improved, and ground surface settlement caused by subsequent tunnel excavation is effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a prestressed connection device of a small-diameter pipe curtain structure and a construction method thereof. Background technique [0002] When tunnels pass through sensitive buildings such as existing highways, railways, airports, cultural relics and historic sites, pipe curtain structures are often used as pre-support, and then underground excavation construction is carried out under the protection of pipe curtain structures. A plurality of curtain pipes (usually prefabricated steel pipes) are jacked in sequence according to specific positions, and then connected into a specific form of pipe curtain pre-support structure through auxiliary measures such as grouting inside and between curtain pipes. [0003] The tube curtain structure is formed by jacking up multiple curtain tubes sequentially and snapped together by locks, so the lateral stiffness (horizontal integrity)...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of limited internal space of small-diameter curtain tubes and difficulty in applying prestress, the present invention provides a prestressed connection device for small-diameter tube curtain structures and its construction method, which is easy to operate and effectively improves the lateral stiffness and integrity of the tube curtain structure , to effectively control the surface settlement caused by subsequent tunnel excavation

Images