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On-site overhanging protection method of high-voltage cable bailey truss under condition of excavation of foundation pit

A cable shell and beret technology, applied in the field of construction, can solve the problems of large space occupation, high cost, time-consuming and labor-intensive, etc., and achieve the effect of low cost, small land occupation, and construction safety protection.

Inactive Publication Date: 2015-06-03
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a method for in-situ suspension protection of high-voltage cable bailey under the condition of foundation pit excavation, so as to solve the defects of time-consuming, labor-intensive, high cost and large space occupation of existing methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method is carried out in eight steps. First, (1) the anchorage section of the column of the Bailey frame: firstly, the artificial excavated pile is constructed on the original ground of the foundation pit according to the coordinate position, and the artificial excavated pile with the cross section of the anchorage end of the column is φ1200mm to the bottom of the foundation pit. Merge into the 5m end hole of strong weathered rock, and then bury the Bailey frame column on the pile top; (2) Build the Bailey frame structure: bury 2 I 50b I-beams on the pile top, and erect 2 I 50b I-beam beams , 40b# I-beam main beam and 14# channel steel, 40b# I-beam main beam is connected with two I 50b I-beam beam bolts, and the Bailey frame main beam, Bailey frame secondary beam, and Bailey frame purlins are erected. The main girder of the Bailey frame is two I50b I-beams horizontally erected on the top of the column of the Bailey frame, and the secondary beam of the Bailey frame is...

Embodiment 2

[0023] Repeat embodiment 1 by the same steps as described, the difference is: step (1) Bailey frame column anchor section: merge into the middle weathered rock 3m end hole, then bury the Bailey frame column at the pile top, step (2) ) to erect the Bailey frame structure: the Bailey frame beam is two 40b# I-beams, the beam top elevation is -0.17m, the distance between the two I-beams is 3m, and the span is 9m.

Embodiment 3

[0025] Repeat embodiment 1 by the same steps as described, the difference is: step (1) Bailey frame column anchorage section: merge into the micro-weathered rock 2m end hole, then bury the Bailey frame column at the top of the pile, step (2) ) to erect the Bailey frame structure: the Bailey frame beam is two 40b# I-beams, the beam top elevation is -0.17m, the distance between the two I-beams is 4m, and the span is 10m.

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Abstract

The invention discloses an on-site overhanging protection method of a high-voltage cable bailey truss under the condition of excavation of a foundation pit and relates to the technical field of construction. The on-site overhanging protection method includes steps of (1) anchoring an upright of the bailey truss; (2) erecting the bailey truss; (3) excavating locally under a cable; (4) forming an overhanging system; (5) overhanging the cable; (6) demounting an original cable groove; (7) excavating the foundation pit; (8) newly building a cable groove and demounting the overhanging system. The overhanging protection system for all high-voltage cables can be completed before excavation of the foundation pit in the corresponding positions, and during construction of the high-voltage cable overhanging protection system, and relevant staff of the power sector is invited to monitor and guide on the site. Meanwhile, wrapping protection of cables and cable joints is implemented by cooperation with the power sector, and construction safety is sufficiently guaranteed.

Description

technical field [0001] The invention relates to the field of construction technology, and more specifically, the invention relates to a method for in-situ suspension protection of a high-voltage cable bailey under the condition of foundation pit excavation. Background technique [0002] The foundation pit is the earth pit excavated at the foundation design position according to the base elevation and foundation plane size. Before excavation, the excavation plan should be determined according to the geological and hydrological data, combined with the conditions of the nearby buildings, and the waterproof and drainage work should be done well. If the excavation is not deep, the side slope can be used to stabilize the soil slope, and the slope size is determined according to the relevant construction regulations. For those with deep excavation and nearby buildings, the foundation pit wall support method, shotcrete retaining wall method, and large foundation pit even adopt meth...

Claims

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Application Information

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IPC IPC(8): F16L3/00E02D17/02
CPCH02G9/02
Inventor 蔡科吴立
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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