A construction method for protecting an underground high-voltage cable box culvert across a foundation pit

Abstract

The invention provides a construction method for protecting an underground high-voltage cable box culvert crossing a foundation pit. The construction method comprises the steps that 1, measurement lofting is conducted, and positions of the cable box culvert and a guarding pile are determined; 2, soil bodies on the two sides of the cable box culvert are dug, and I-shaped steel beams are preinstalled; 3, groove soil in the lower part of the cable box culvert is artificially removed, and connecting rods are arranged; 4, triangular square steel frames are welded to the two ends of each connectingrod; 5, I-shaped steel frames are uplifted and anchored; and 6, after concrete is hardened, soil bodies between grooves are artificially removed, steel bar net pieces are welded between the connectingrods on the lower portion of the cable box culvert, and then the concrete are injected for anchoring. By means of the construction method, the effect that the underground high-voltage cable box culvert is buried in a tunnel construction passage is effectively achieved, the safety of the cable box culvert is ensured more effectively through supporting of I-shaped steel, the relocation of the high-voltage cable box culvert is avoided, the construction period is shortened for the whole construction process, the construction efficiency is improved, the relocating cost is saved, the construction cost is reduced, and the impact on surrounding residents is relieved.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a construction method for protecting an incoming line of an underground high-voltage cable box culvert spanning a foundation pit with a cast-in-place support. Background technique [0002] In recent years, with the acceleration of my country's urbanization process and the rapid growth of urban population, urban ground transportation systems have become increasingly congested, and urban rail transportation has developed rapidly in large and medium-sized cities. In the construction of urban rail transit, urban underground pipelines such as underground high-voltage cables are often encountered. During the construction process, some construction units forced construction in order to catch up with the construction period, which is very likely to cause large deformation or damage to urban underground pipelines such as underground high-voltage cables. Under...

AI Technical Summary

Problems solved by technology

"However, the cable box culvert protection method described in this invention requires that there be a shelving girder parallel to the location of the box culvert, which is not suitable for the protection of cable box culverts on tunnel construction passages without shelving girders. At the same time, this technology uses steel wire rope Suspension protection is carried out. Long-term suspension under heavy loads is likely to cause creep of the steel wire rope. In addition, due to the frequent entry and exit of transportation equipment in the field construction state, a little carelessness may touch the wire rope of the suspension device, causing the box culvert to move left and right. Shaking, while the steel wire rope may experience uneven stress, increased local stress, and breakage. In severe cases, accidents may occur, endangering the lives of construction workers and wasting social wealth.

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