How is the cast track laid?
The new track of line ~14 has greatly changed from the previous subway track.
△ the fifth step of formwork installation is to pour self compacting concrete between the track slab and the base to permanently fix the track slab.
The installation accuracy of such heavy slab and track is controlled by mm.
High precision measurement equipment is used to locate and control the state of track plates and rails in the whole process, so as to ensure that they meet the design standards.
The high-precision total station + fine adjustment prism is used for rapid measurement to obtain the adjustment data, and then the special fine adjustment equipment is used to adjust the track plate to the design position, and the adjustment error is controlled within 1mm.
A high-precision CP Ⅲ precision measurement control network needs to be established.
△ concrete distributor car △ equipment drawing of new energy rail car △ specific construction process of rail laying car.
How do they construct? Look down with the old fellow! ▼ first, an automatic factory needs to be established to produce various types of track plates according to the design requirements.
It looks like it is made up of a block of precast track slab and rail, which is beautiful and good quality.
△ track plate fine adjustment after the fourth step of fine adjustment, install edge sealing formwork and anti floating device to fix the track plate.
△ track plates are stored along the subway construction line.
The third step is the fine adjustment of the track plate.
The first step is the construction of track slab base.
Oh, Bao old fellow and old iron together to find out how it was laid.
Transport the produced track plate to each construction site.
The longest metro line of Shenzhen phase IV project, line 14, has been connected to the long track! It is said that the new assembly line has been adopted in the whole line.
Characteristics of good maintainability △ cast precast slab track finished products.
△ survey drawing next, the unit responsible for laying innovated the construction technology and transported the track plate, steel rail, self compacting concrete and other materials to the subway line for assembly by using new equipment such as new energy rail car, pure electric deformable tire rail laying car, concrete distributing car and slab carrier.
△ base reinforcement binding △ precast track slab track bed base concrete pouring △ finished track bed base step 2: lay self compacting layer reinforcement mesh on the base, then use gantry crane or truck crane to hoist the track slab from the track row shaft or interval shield shaft of the track laying base to the track area, and then transport the track slab to the construction face by rail car, Finally, the track laying vehicle is used to hoist the track to the predetermined position.
△ at the last step of self compacting concrete pouring, install fasteners, and use rail inspection trolley to check and adjust the track to form a stable and comfortable subway track.
△ fastener installation △ track fine adjustment.
The lightest precast track slab is 6 tons, the weight is 12 tons, and one steel rail is 25 meters long.
