A slope-changing slideway device for jacking prefabricated frames and its construction method

Abstract

The invention discloses a varying slope slideway device used for jacking a precast frame and a construction method of the varying slope slideway device. The varying slope slideway device is composed of a reinforced concrete segment, a crushed plain concrete segment and a concrete filled steel tube segment. The concrete filled steel tube segment comprises a slope segment and a design segment, and steel tube net is paved on the slope segment and the design segment. The steel tube net has the structure that multiple bottom-layer transverse steel tubes arrayed parallelly are arranged at the bottom layer, multiple upper-layer longitudinal steel tubes arrayed parallelly are arranged on the bottom-layer transverse steel tubes, the contact positions of the bottom-layer transverse steel tubes and the upper-layer longitudinal steel tubes are welded, the multiple upper-layer longitudinal steel tubes arrayed parallelly are welded through first rebars and the multiple bottom-layer transverse steel tubes arrayed parallelly are welded through second rebars. By applying the varying slope slideway device, the precast frame can be quickly accurately jacked for construction in a most jacking force-saving manner after being overturned and entering a slop ramp without damaging a slideway.

Description

technical field [0001] The invention relates to a device for jacking a prefabricated frame, in particular to a slope-changing slideway device for jacking a prefabricated frame. The invention also relates to the construction method of the slope-changing slideway device for jacking the prefabricated frame. Background technique [0002] At present, there is a situation that after the prefabricated frame is prefabricated outside the line, it is found that the actual elevation of the upstream drainage culvert does not match the design—the elevation of the upstream flow surface is lower than the design flow elevation of the newly built railway-related culvert, resulting in the frame culvert being built according to the design. Unable to drain. In order to solve the problem of culvert drainage, it is necessary to lower the design elevation of the culvert in the railway section. Since the prefabricated frame has been prefabricated according to the original design elevation, the ja...

AI Technical Summary

Problems solved by technology

[0005] 2. When the prefabricated frame passes through the upward slope point, the prefabricated frame is turned from the prefabricated section to the slope section. During the turning process, the slope point bears the weight of the entire frame body. The concentrated load of the slope point not only pries the rear end of the prefabricated frame relatively high, which affects the jacking operation, but also easily damages the prefabricated frame due to the concentrated load of the upward slope point

[0006] 3. After the prefabricated frame is overturned from the upward slope point, it enters the slope section. After the prefabricated frame is overturned and during the jacking process of the slope section, it has a downward impact on the slope section, which is very easy to cause damage to the slideway and affect the jacking. going well

Especially when passing through the downward slope point, the prefabricated frame is in a simply supported state, and the slideway in the slope section and the design section is subjected to the concentrated load of the prefabricated frame, which is very easy to cause damage to the slideway made of ordinary reinforced concrete

Images