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Construction method for vibrated asphalt concrete anti-infiltration core wall of earth rockfill dam

A technology of asphalt concrete and construction method, applied in the direction of dams, sheet pile walls, barrages, etc., can solve the problems of poor overall stability and anti-seepage effect, expensive equipment, strict environmental temperature requirements of asphalt concrete, etc., and achieve simple construction equipment Easy to implement, simple in structure, easy to popularize and apply

Active Publication Date: 2006-07-26
CHINA WATER NORTHEASTERN INVESTIGATION DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a construction method for the vibrating asphalt concrete anti-seepage core wall of an earth-rock dam to solve the problem of the poor overall stability and anti-seepage effect of the pouring type or the high cost of the equipment of the rolling type and the impact of asphalt concrete on the ambient temperature. demanding questions

Method used

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  • Construction method for vibrated asphalt concrete anti-infiltration core wall of earth rockfill dam
  • Construction method for vibrated asphalt concrete anti-infiltration core wall of earth rockfill dam
  • Construction method for vibrated asphalt concrete anti-infiltration core wall of earth rockfill dam

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Include the following steps:

[0083] a. Laying formwork:

[0084] During construction, the asphalt concrete formwork is laid vertically on the base of the core wall, so that the centerline of the formwork and the centerline of the core wall completely coincide; the sliding formwork structure is adopted; the sliding formwork warehouse is divided into three parts: rolling warehouse, film-laying warehouse and pouring warehouse. Among them, the length of the rolling bin is 4m, the length of the film-laying bin is 1m, the length of the pouring bin is 4m, the height of the formwork bin is 35cm, and the width of the formwork is determined to be 150cm according to the width of the core wall base. The sliding formwork bin is pulled by hoist or other traction equipment. The formwork is made of 10mm steel plate. A certain number of supports are welded inside the rolling bin. The film-laying bin is equipped with a film-laying shaft, and a reverse baffle is set between the film-lay...

Embodiment 2

[0098] a. Laying formwork:

[0099] During construction, the asphalt concrete formwork is laid vertically on the core wall, so that the centerline of the formwork and the centerline of the core wall completely coincide; the assembled movable formwork is adopted, the length of the steel plate is 4m, and the supporting frame is movable in the middle, and the width of the two steel plates is 100cm.

[0100] b. Lay non-woven fabric:

[0101] After the formwork is laid, a 200°C high-temperature resistant non-woven fabric is laid close to the inside of the formwork, and the width is 8cm higher than the height of the formwork;

[0102] c. Paving transition material and rolling of transition material:

[0103] Pave the common transition material for the dam on the outside of the formwork, and roll it until the compactness meets the design requirements of the dam; at the same time

[0104] Embodiment 1;

[0105] d. Paving asphalt concrete:

[0106] Pour the vibrated asphalt mixture...

Embodiment 3

[0116] a. laying formwork: with embodiment 1

[0117] b. Lay non-woven fabric:

[0118] After the template is laid, lay a high-temperature resistant non-woven fabric close to the inside of the template. The non-woven fabric can withstand high temperatures of 250°C and the width is 10cm higher than the height of the template;

[0119] c. paving transition material and transition material rolling: same as embodiment 1

[0120] d. Paving asphalt concrete:

[0121] Pour the vibrated asphalt mixture into the formwork and use a knife plate vibrator to vibrate it compactly. The raw materials of the vibrated asphalt mixture include: parts by weight:

[0122]Aggregate and slag powder, 100 parts, the performance of the aggregate and slag powder should meet the requirements of the "Design Criteria for Asphalt Concrete Face and Core Wall of Earth-rock Dam" (SLJ01-88), of which 85% are aggregate, the maximum particle size is 20mm, and the rest are Mineral powder;

[0123] Asphalt, asph...

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Abstract

The invention relates to a method for building earth-rock dam vibrated bitumen concrete seepage cutoff wall, belonging to the construction of earth-rock dam seepage cutoff wall. It comprises following steps: a, laying mold plate which comprises slide mold plate or assemble movable mold plate; b, laying high temperature resistant non-woven cloth; c, laying transition material and rolling the transition material; d, laying bitumen concrete: filling vibrated bitumen mixed material into the mold plate and using blade vibrator to vibrate it while the mixed material comprises: skeletal material, powdered ore and bitumen; e, moving the mold plate or removing the mold plate; f, keep warm and maintaining. The invention has the advantages that: it is not limited by temperature while it can be processed above -25Deg.C; and the vibrated bitumen concrete is uniform with better seepage cutoff ability, unlimited by temperature and simple device.

Description

technical field [0001] The invention belongs to a construction method for an anti-seepage core wall of an earth-rock dam. Background technique [0002] The application of asphalt and asphalt mixture in water conservancy and hydropower projects began in the 1920s. Generally, there are only two construction methods for hydraulic asphalt concrete - pouring or rolling. [0003] Poured asphalt concrete has a large asphalt content, poor overall uniformity after paving, and large deformation of asphalt concrete. When preparing asphalt concrete, it needs decompression residue oil that is in short supply in the market. Its development is limited by the shortage of raw materials. The structural type is to use asphalt mortar. Concrete prefabricated blocks are used as the auxiliary wall of the asphalt concrete anti-seepage core wall, and self-leveling and self-compacting asphalt concrete is poured in the middle of the auxiliary wall—poured asphalt concrete. Since the concrete prefabric...

Claims

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Application Information

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IPC IPC(8): E02B7/06E02D5/18E02D31/10E04G21/06C08L95/00
Inventor 王德库孙荣博金正浩苑润保侯福江吴春雷王科峰叶远胜马智法
Owner CHINA WATER NORTHEASTERN INVESTIGATION DESIGN & RES
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