Pile-splicing construction method and pile-splicing component for guiderails in expressway rebuilding and expansion and major maintenance projects

A technology for highways and construction methods, applied in infrastructure engineering, roads, roads, etc., can solve the problem of inability to guarantee vehicle traffic safety and traffic safety facility technical specifications and national standards, the relative height reduction of guardrails and road surfaces, and traffic flow safety Hidden dangers and other problems, to achieve the effect of saving transportation and reverse transportation costs, shortening transportation time, and closing time

Active Publication Date: 2015-06-03
黑龙江省北龙交通工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the reconstruction and expansion of highway projects, especially in the construction of overhaul projects, due to the elevation of the road surface after the overhaul of the roadbed and road surface, the relative height between the original guardrail and the road surface is reduced, causing a large safety hazard to traffic flow, which cannot be guaranteed Technical specifications and national standards for vehicle traffic safety and traffic safety facilities. In the past, dismantling and re-construction cost was high, the process was complicated, and waste products were lost

Method used

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  • Pile-splicing construction method and pile-splicing component for guiderails in expressway rebuilding and expansion and major maintenance projects
  • Pile-splicing construction method and pile-splicing component for guiderails in expressway rebuilding and expansion and major maintenance projects
  • Pile-splicing construction method and pile-splicing component for guiderails in expressway rebuilding and expansion and major maintenance projects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A construction method for guardrail pile connection in expressway reconstruction, expansion and overhaul projects, the method comprising the following steps: according to the diameter size of the original highway guardrail column, processing a steel pipe with a strength not lower than the original highway column strength to form a joint with variable section diameter. Pile component 1, using variable cross-section steel pipes as connectors, after the piles are connected, use a hydraulic pile driver to carry out pressure pile sinking according to the design construction size, and control the elevation and verticality during the pile sinking process through a level gauge and a verticality tester. Until the design requirements are met; through the bolt holes of the pile-connecting member and the original column 2, they are fixed and locked with high-strength bolts, so that the original column and the pile-connecting part are integrated to achieve the designed force strength;...

Embodiment 2

[0018] In the above-mentioned expressway reconstruction and expansion and overhaul project guardrail pile connection construction method, the diameter and wall thickness of the pile connection member are determined. The original material as the pile connection material should be the same as the original column material or slightly higher, and its thickness and diameter Try to be equal or not lower than that to ensure its strength and aesthetics; the determination of the length of the original material of the pile-connecting member is to ensure that the original column hole can be used to connect, and to meet the steel guardrail acceptance after the guardrail board is suspended. Standard, the length of the original material should be ≥ the increased height of the road surface + the downward pressure stroke of the pile + the hole distance of the original column + the edge length of the hole distance; after the standard size is determined, the corresponding steel pipe length is int...

Embodiment 3

[0020] In the above-mentioned construction method of highway reconstruction and expansion and overhaul project guardrail pile connection, the pile position plane layout of the pile sinking is revised, the theodolite is used for linear stakeout calibration, the level controls the elevation, and the verticality tester controls the verticality of the pile connection , the meter ruler controls the pile position spacing, and the offset value is calibrated at the original pile position so as to control the pile sinking process.

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Abstract

The invention discloses a pile-splicing construction method and a pile-splicing component for guiderails in expressway rebuilding and expansion and major maintenance projects. At present, potential safety hazard is caused to traffic on road rebuilding and expansion projects. The method provided by the invention comprises: welding or cold-processing steel tubes with the strength not lower than that of the original road upright posts according to the pipe diameter dimension of original road guiderail upright posts to be a pile-splicing component (1) with a variable cross-section pipe diameter; using the variable cross-section steel tube as a connector, fixedly locking the pile-splicing component and bolt holes of the original upright post (2) by using high-strength bolts, so that the original upright post and the pile-splicing part are integrated to reach stress strength; using a hydraulic pile driver after pile-splicing, carrying out pile-sinking according to the designed construction dimension, controlling elevation and vertical degree in the pile-sinking process by a levelling instrument and a vertical degree tester until satisfying the design requirements; installing an anti-blocking block or a bracket (3) and installing barrier plates (4) by the high-strength bolts. The pile-splicing component is used for pile-splicing construction of guiderails in expressway rebuilding and expansion and major maintenance projects.

Description

Technical field: [0001] The invention relates to a construction technology method and a pile-connecting component for guardrails of expressway reconstruction and expansion and overhaul projects. Background technique: [0002] With the continuous deepening of national macroeconomic regulation and control, my country's expressway construction market is booming. By the end of 2011, the total expressway mileage has reached 85,000 kilometers, ranking second in the world. According to the actual situation of each region, various construction methods such as new construction, reconstruction, expansion and overhaul are adopted in the process of expressway construction. At present, in road reconstruction and expansion projects, especially in the construction of overhaul projects, due to the elevation of the road surface after the overhaul of the roadbed and road surface, the relative height between the original guardrail and the road surface is reduced, causing a large safety haza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01F15/04E02D7/00E02D7/20E02D5/64
Inventor 张春秋董丽艳张明伟周景新马长青张利忠王金发苏红英张永祥
Owner 黑龙江省北龙交通工程有限公司
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