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

A construction method and technology for steel pipe piles are applied in the field of anti-scour of riverbeds, which can solve problems such as inability to insert steel pipe piles, and achieve the effects of improving stability and safety, strong anti-scouring ability, and improving construction efficiency.

Active Publication Date: 2019-03-19
GUANGXI ROAD CONSTR ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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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-type 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 pebbles, and the covering layer is 3~7m. The descending order is strong weathered sandstone and medium weathered sandstone. The traditional steel pipe pile construction method cannot be inserted into the bridge. Design depth, once the hydropower station floods, t...

Embodiment example 2

[0060] The upper structure of a bridge adopts 9×40m first simply supported and then continuous prestressed concrete T-beams, and the lower structure piers are column piers. There are 5 rows of pier columns on the river bed. 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 relates to an anti-scouring construction method of a steel trestle bridge pile on a thick boulder covering layer of a shallow water river bed, which includes a construction method for cleaning the thick boulder covering layer of a shallow water river bed, a construction method of steel pipe piles, a gabion backfill anti-scouring construction method, and the like; By using an excavator or a grab to remove the thick boulder covering layer on the surface of the river bed, the problem that the steel pipe pile cannot be inserted to the design depth in the thick boulder covering layer is solved, and then the boulders are used for partial backfilling and then the stone is used. The method of backfilling the cage achieves the purpose of improving the overall stability and erosion resistance of the steel trestle bridge. The invention solves the problem that steel pipe piles cannot be inserted to the design depth on the thick boulder covering layer of the river bed, which leads to poor anti-scourability and easy collapse of the steel trestle bridge, and is different from the traditional construction method of directly hitting and inserting steel pipe piles on the river bed covering layer. Compared with the two processes of cleaning the thick boulder covering layer and backfilling the gabion, it can improve the overall anti-scouring performance of the steel trestle bridge; it greatly expands the scope of application of the steel trestle bridge.

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 Patents(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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