Precast pile, beam and slab renovation technology for diseases of existing line tunnel base
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A technology of prefabricated piles and existing lines, which is used in infrastructure engineering, construction and other directions to achieve the effects of reducing construction time, easy post-maintenance and high production rate
Inactive Publication Date: 2015-04-22
SOUTHWEST JIAOTONG UNIV
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Due to the strong concealment of the tunnel structure and the limitations of existing detection methods, the severity and development trend of the tunnel damage can only be gradually revealed with the deepening of the renovation construction.
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[0027] The present invention will be further described below in conjunction with accompanying drawing:
[0028] (1) According to the requirements of tunnel foundation disease treatment, prefabricate and produce cylindrical piles, beams and slabs, beams such as Figure 4 As shown, the board as Figure 5 shown.
[0029] (2) Constrained beam overhead lines are used, such as figure 1 As shown, first, according to the placement position requirements of the beam structure 2, the base structure is cut 11, and the groove 11 is perpendicular to the track. According to the placement requirements of the pile structure 2, drilling operations are carried out in the beam cutout.
[0030] (3) if figure 2 As shown, clean the pile hole and embed the prefabricated pile 2, and carry out the grouting operation to compact the gap around the pile;
[0031] (4) After the strength of the filling grout between the prefabricated pile and the hole wall reaches 10Mpa, place the metal backing plate ...
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Abstract
The invention discloses a precast pile, beam and slab renovation technology for diseases of an existing line tunnel base. The technology is used for reinforcing and renovating of a tunnel which is large in base disease range and serious in disease condition. Piles, beams and slabs are prefabricated outside a hole, restrained beams are used for erecting lines overhead, drilling is conducted, precast piles are embedded, cement slurry is poured, the beams are erected on the piles, the slabs are paved, and railway ballast is backfilled. According to the precast pile, beam and slab renovation technology for the diseases of the existing line tunnel base, the piles, the beams and the slabs are all prefabricated outside the hole, the aspects of materials, dimensions, maintenance and the like are all guaranteed, end product quality is high, and durability is achieved. The pile, beam and slab prefabricating technology is adopted, concentrated batch production can be achieved, the construction time inside the hole can be reduced, the time limit for a project is shortened, and an operation influence is reduced. After the precast piles, the beams and the slabs are constructed, later period maintenance is relatively easy. The precast pile, beam and slab renovation technology has the advantages of being practical, rapid, safe, easy to renovate and thorough in disease treatment.
Description
Technical field [0001] The invention relates to the field of tunnel construction, and is particularly suitable for the treatment of large-scale and serious bottom diseases of tunnels. Background technique [0002] The bottom of the railway tunnel is the base structure of the track, and the solidity and stability of the base structure is the first condition to ensure the good condition of the track. Due to the weak structural durability design, unreasonable drainage design, defective construction technology, poor quality, inadequate daily maintenance and maintenance, and natural and human factors at the bottom of the tunnel, the bottom of the tunnel is subject to repeated train dynamics and groundwater erosion. Cracking, damage, subsidence, extrusion to both sides, mud turning, and mud emergence. These diseases will cause gauge deviation, rail and joint fracture. If things go on like this, it will adversely affect railway operations and passenger comfort, and even endanger ...
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