Anti-scouring construction method adopting steel trestle steel pipe piles on shallow water riverbed thick boulder covering layer

A construction method and technology of steel pipe piles, which are applied in the anti-scour field of riverbeds, can solve problems such as the inability to insert steel pipe piles, achieve the effects of improving stability and safety, reducing construction costs, and strong erosion resistance

Active Publication Date: 2017-09-08
GUANGXI ROAD CONSTR ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects of the prior art, the present invention provides an anti-scouring construction method of steel trestle steel pipe piles on the thick boulder covering layer of the shallow water riverbed. Remove the thick boulder covering layer on the riverbed surface near the steel pipe pile directly on the shallow river bed or on the transport ship, and then use a vibrating hammer to hammer the steel pipe pile to penetrate the boulder layer to solve the problem of steel pipe piles in the thick boulder covering layer. To solve the problem that the pipe piles cannot be inserted to the design depth, use boulders to partially backfill to the design requirements, and then use gabions to backfill, so as to improve the overall stability and erosion resistance of the steel trestle.

Method used

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  • Anti-scouring construction method adopting steel trestle steel pipe piles on shallow water riverbed thick boulder covering layer
  • Anti-scouring construction method adopting steel trestle steel pipe piles on shallow water riverbed thick boulder covering layer
  • Anti-scouring construction method adopting steel trestle steel pipe piles on shallow water riverbed thick boulder covering layer

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Embodiment example 1

[0058] The upper structure of the approach bridge on one side of a bridge adopts 7x40m first simply supported and then continuous prestressed concrete T beam, the upper structure of the main bridge adopts 70+125+125+70m prestressed concrete continuous box girder, and the upper structure of the approach bridge on the other side adopts 8×40 The first is simply supported and then the continuous prestressed concrete T-beam. The pier under the main bridge is a reinforced concrete solid wall pier, and the pier under the approach bridge is a column pier. There are 6 rows of pier columns on the river bed. bridge construction. The bridge is located about 300m downstream of a hydropower station. The river bed is covered by a pebble layer, and the covering layer is 3-7m. The descending order is strong weathered sandstone and moderately weathered sandstone. The traditional steel pipe pile construction method cannot be inserted into the bridge. Design depth, once the hydropower station flo...

Embodiment example 2

[0060] The upper structure of a certain bridge adopts 9×40m first simply supported and then continuous prestressed concrete T-beams, and the lower structure piers are column piers. The bridge is located at a location where the water flow is turbulent, and the riverbed is covered by pebbles, with a covering layer of 4-8m. According to the practice and experience of Case 1, the construction method of Case 1 is used to construct steel pipe piles for the steel trestle bridge, which greatly shortens the construction time of the steel trestle bridge. The construction period saves the construction cost, improves the anti-scouring ability of the steel trestle, and ensures the stability and safety of the steel trestle. During the construction of the bridge, the steel trestle was as stable as ever after experiencing several major flood seasons.

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Abstract

The invention provides an anti-scouring construction method adopting steel trestle steel pipe piles on a shallow water riverbed thick boulder covering layer. The anti-scouring construction method comprises a shallow water riverbed thick boulder covering layer clearing construction method, a steel pipe pile construction method, a gabion backfill anti-scouring construction method and the like. The thick boulder covering layer on the surface of a riverbed is cleared away by using an excavator or a grab bucket, the problem that the steel pipe piles in the thick boulder covering layer cannot be inserted into the designed depth is solved, then the gabion backfill method is applied after partial backfill is carried out by utilizing gabions, and the purposes of improving the integrated stability and anti-scouring performance of a steel trestle are realized. The anti-scouring construction method solves the problem that the steel trestle is poor in integrated anti-scouring capacity and prone to collapsing due to the fact that the steel pipe piles on the riverbed thick boulder covering layer cannot be inserted into the designed depth; compared with a traditional construction method that steel pipe piles on a riverbed covering layer are directly stricken and inserted, the anti-scouring construction method has the advantages that two processes of thick boulder covering layer clearing and gabion backfill are added, so the integrated anti-scouring performance of the steel trestle can be improved; the application range of the steel trestle is greatly expanded.

Description

technical field [0001] The invention relates to the field of anti-scouring of riverbeds, in particular to a brand-new construction method for resisting water erosion by using gabion backfilling to reinforce steel trestle steel pipe piles after clearing boulder layers on thick boulder covering layers of shallow water riverbeds. Background technique [0002] In the process of building bridges across rivers, steel trestle bridges are often erected in advance beside the bridges as construction transportation channels. In addition, the steel trestle bridges can also be attached to erect work platforms to realize the transformation from water to land construction operations. The steel trestle bridge is composed of lightweight standardized truss unit members made of high-strength steel, beams, longitudinal beams, bridge decks, bridge seats and connectors, etc., and can be quickly assembled on-site with special installation equipment to be suitable for various spans and loads. The t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/28E02B3/02
CPCE02B3/026E02D5/285
Inventor 张坤球张勇赵武覃向来秦猛
Owner GUANGXI ROAD CONSTR ENG GRP CO LTD
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