Sleeved inner liner reinforcing structure for electrical operation of cable tunnel and construction method thereof

Abstract

The invention belongs to the technical field of tunnels and underground engineering design and construction and especially relates to a sleeved inner liner reinforcing structure for electrical operation of a cable tunnel and a construction method thereof. The sleeved inner liner reinforcing structure comprises an original arch portion, an original side wall, a base plate cushion, an inverted arch, an inner liner arch portion, an inner liner side wall, a cable support, a cable and a sidewalk base plate. The construction method has following steps: (1) a middle cross arm is erected at the middle of the tunnel; (2) excavation downwards is executed to the bottom of the tunnel original base plate; (3) the structure inverted arch is cast and the sidewalk base plate is cast on the inverted arch; (4) the cable is shifted to a middle position of the tunnel; (5) a water proof layer on the original tunnel inner wall surface is laid and the inner liner arch portion and the inner liner side wall are cast with molds; (6) the cable support and the cable are reinstated and a pavement structure is cast. The invention can ensure the effective control of the strata deformation and the structural stability in the complex environment of the city, and realize the normal operation of the cable in the tunnel during the reinforcement construction stage to ensure the safety of the tunnel structure and power supply and prolong the service life of the cable tunnel.

Description

technical field [0001] The invention belongs to the technical field of design and construction of tunnels and underground engineering, and in particular relates to a liner reinforcement structure and a construction method for a live running cable tunnel. Background technique [0002] With the rapid development of economic construction, the cable network can develop rapidly. As a unique path resource, the underground tunnel system dedicated to cables has become an indispensable and important power facility for the power grid. Cable networks and cable tunnels are playing an increasingly important role in the power grid. Most of the existing cable tunnels in my country started to be constructed in the late 1990s, and single-layer shotcrete lining was mostly used. The operation has become a period of high incidence of tunnel diseases, mainly manifested in structural convergence deformation, cracks, water leakage and structural deterioration. Or, when other underground structure...

AI Technical Summary

Problems solved by technology

The treatment of cable tunnel diseases and the reinforcement of close construction are still in their infancy in my country, the conditions and causes of the diseases are complex, and the reinforcement space is narrow

The current disease control mainly considers measures such as grouting reinforcement, water blocking, and local reinforcement of steel plates. It is difficult to fundamentally treat the disease and cannot prevent the disease from continuing to develop.

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