Waterproof type single-layer lining structure applicable to fourth level surrounding rock double-line track and manufacturing method thereof

Abstract

The invention discloses a waterproof type single-layer lining structure applicable to a fourth level surrounding rock double-line track. The waterproof type single-layer lining structure applicable tothe fourth level surrounding rock double-line track comprises fourth-level surrounding rocks subjected to smooth blasting treatment and further comprises omega-shaped spring drainage half pipes and anchored rods arranged in the fourth-level surrounding rocks in a struck manner. The anchored rods are perpendicular to the rock surfaces of the fourth-level surrounding rocks. The rock surfaces of thefourth-level surrounding rocks are further subjected to washing, injection of a first layer crude fiber concrete and curing, injection of mortar and curing, spraying of a waterproof material and curing, ejection of a second layer fine fiber concrete and curing in sequence. According to the waterproof type single-layer lining structure applicable to the fourth level surrounding rock double-track tunnel involved, force bearing of the single-layer lining structure formed by the technology is uniform; the structure has certain deformation resistant capacity; the construction technology is simple;the construction period is short; construction pollution is reduced; the structure is low-carbon and environment-friendly and widely applied to projects of fourth-level surrounding rock double-tracktunnel lining structures.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a waterproof single-layer lining structure suitable for four-level surrounding rock double-track tracks and a manufacturing method thereof. Background technique [0002] At present, composite lining structures are mostly used in subway surrounding rock support projects. The structural form is: primary support (spray anchor) + waterproof layer (coil material) + secondary lining (formed concrete). The support principle is: primary support The support and the surrounding rock form a unified force-bearing whole, which is the main load-bearing structure, and the secondary lining is used as a safety reserve. Plain concrete is generally used, and reinforced concrete can be used under special working conditions. Although the design of the bearing mechanism of the composite lining is reasonable, there are still many problems in its application: ① The secondary lini...

AI Technical Summary

Problems solved by technology

Although the design of the bearing mechanism of the composite lining is reasonable, there are still many problems in its application: ① The secondary lining is constructed after the deformation of the surrounding rock is basically stable. In theory, it does not bear the load and is only used as a safety reserve. Improvement; ②Composite lining is completed by multiple constructions such as anchor shotcrete support, composite waterproof board, and secondary molded concrete. There are many steps and a long time, which is not conducive to the rapid construction of the tunnel

③The waterproof effect is difficult to guarantee

Once the drainage system is blocked, the secondary lining will bear the water pressure, the structural safety will be reduced, and it will easily cause leakage

Moreover, the leakage treatment is difficult and the effect is poor; ④ It is difficult to maintain the leaking waterproof system (construction joints, etc.) and the blocked ring longitudinal drainage system

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