Bolt splicing axis bendable all-prefabricated splicing open excavated cable tunnel

Abstract

The invention relates to a cable tunnel structure of a power transmission line, in particular to a bolt splicing axis bendable all-prefabricated splicing open excavated cable tunnel. The cable tunnelis structurally characterized in that the cable tunnel is formed by splicing a plurality of cable prefabricated tunnel sections and comprises the standard tunnel section and the bending tunnel sections; each cable prefabricated tunnel section comprises a concentric-square-shaped tunnel body, a grounding system and a support system; each support system comprises a groove type component and suspension arm transverse supports; the groove type components are embedded and distributed in the sidewalls of the concentric-square-shaped tunnel bodies; the suspension arm transverse supports are fixedly connected with the corresponding groove type components through bolts; each grounding system comprises an outer grounding steel ring, an inner grounding ring and connecting parts connecting the outer grounding steel ring with the inner grounding ring; the inner grounding rings are connected with the groove type components embedded in the support systems; each concentric-square-shaped tunnel body comprises a cable erection space composed of the suspension arm transverse supports and a walking maintenance channel; every two adjacent cable prefabricated tunnel sections are connected through double-end bending bolts. The cable tunnel structure has the advantages that the workload of field construction is greatly reduced; the construction quality is improved; the cable tunnel structure is convenient and fast to use and is hardly affected by weather; the construction period is controlled easily; the operation cycle is short.

Description

technical field [0001] The invention relates to a cable tunnel structure in a power transmission line, in particular to a fully prefabricated and assembled open-cut cable tunnel with a bendable axis of bolt splicing. Background technique [0002] In power transmission lines, the existing open-cut cable tunnels mainly use cast-in-place construction to form the main structure. Reasonably set up grounding and support systems in different stages of the aforementioned process. This type of cable tunnel using the cast-in-place process has many on-site procedures before pouring, including cushioning, tie bars, mold building, waterproof gaps, installation of grounding embedded parts, installation of bracket embedded parts, main structure pouring, concrete curing, demolition, etc. Formwork and other processes, and the formation of a tunnel cross-section structure needs to be divided into at least two pourings, and the construction period of the on-site operation is at least more tha...

AI Technical Summary

Problems solved by technology

This type of cable tunnel using the cast-in-place process has many on-site procedures before pouring, including cushioning, tie bars, mold building, waterproof gaps, installation of grounding embedded parts, installation of bracket embedded parts, main structure pouring, concrete curing, demolition, etc. Formwork and other processes, and the formation of a tunnel cross-section structure needs to be divided into at least two pourings, and the construction period of the on-site operation is at least more than 40 days. At the same time, the quality of the concrete cured on site is affected by the weather, and there are also certain differences.

On the other hand, due to the unevenness of the formwork or other reasons, the concrete poured on site will lead to insufficient flatness of the side wall of the cable tunnel, which will affect the installation of subsequent supports and equipment. Therefore, the quality is greatly affected by the construction quality, and the side wall is often uneven. It is impossible to install the equipment support; at the same time, the on-site construction period is long, not only the construction period is difficult to control, but also the overall quality of the structure is easily affected by the weather, and the overall quality and construction period of the project are difficult to control

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