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Construction method for dam partitioned filling and rolling

A construction method and filling technology, which is applied in filling, dams, buildings, etc., can solve the problems of low strength and quality of the dam body, and different strengths, so as to improve the rolling strength and construction quality, improve the strength and quality, and improve effect of effect

Inactive Publication Date: 2020-01-21
中国安能集团第一工程局有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for dam subarea filling and rolling, so as to solve the problem mentioned above in the background technology that each section of the dam now adopts the same method for dam body filling and rolling. Different thicknesses lead to different strengths of each partition, resulting in problems of low strength and quality of the dam body

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  • Construction method for dam partitioned filling and rolling
  • Construction method for dam partitioned filling and rolling

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Embodiment 1

[0027] A construction method for dam subarea filling and rolling, including dam body subdivision filling construction preparation, measurement control, material loading, dam material transportation, paving leveling, water sprinkling, roller compaction and quality inspection, the subdivision Filling construction includes filling and rolling in rockfill area, filling and rolling in transition material, filling and rolling in cushion layer, filling and rolling in auxiliary cushion layer, and filling and rolling in stone masonry slope protection at the back slope of the dam;

[0028] Specific steps are as follows:

[0029] S1 Construction preparation for dam subdivision filling: foundation treatment for each subdivision of filling, embedding of observation facilities, acceptance of filling base, measurement, vertical layer thickness signpost and division boundary calibration;

[0030] S2 measurement control: After the construction base surface is qualified, measure and determine t...

Embodiment 2

[0041]As the second embodiment of the present invention, when the roller compactor adopts segmental rolling for compaction, the rolling traces between the segments overlap, and the overlapping width is different in the junction zone of the cushion layer, the transition layer, and the rockfill area. Less than 110mm, within each zone, the overlapping width is not less than 0.6m.

[0042] Further, the compaction adopts the forward and backward staggered distance method, the staggered distance is 20-30cm, and the walking speed is 1.5km / h-2.5km / h.

[0043] Specifically, the rocks filled in the rockfill area are compacted with a 25-30t vibratory roller, and the rolling is carried out along the axis of the dam with a staggered distance of 30cm, a driving speed of 2.5km / h, and a thickness of 2.5km / h. 90cm, the number of rolling times is 9 times, the specific sequence is 2 times of low frequency and high vibration, then 5 times of high frequency and low vibration, and finally 2 times o...

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Abstract

The invention relates to the technical field of building construction, in particular to a construction method for dam partitioned filling and rolling. The construction method comprises the steps of dam body partitioned filling construction preparation, measurement control, loading, dam material transportation, paving and flattening, watering, compaction through a rolling machine and quality inspection; and partitioned filling construction comprises stone stacking area filling and rolling, transition material filling and rolling, padding layer filling and rolling, auxiliary padding layer filling and rolling, and dam back slope stone paving, slope protecting, filling and rolling. According to the method, stone stacking area filling and rolling, transition material filling and rolling, padding layer filling and rolling, auxiliary padding layer filling and rolling, and dam back slope stone paving, slope protecting, filling and rolling are constructed separately, and different material paving modes and different rolling modes are adopted according to different stone filling amounts in different areas, so that the rolling strength and the construction quality of stone filling in each area are improved, the strength and the quality of a dam body are improved, high-frequency low-vibration rolling and low-frequency high-vibration rolling are adopted in a staggered mode, the filling androlling effect of the stone stacking area is improved, and the structure is stabler.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for dam partition filling and rolling. Background technique [0002] In recent years, with the rapid development of my country's economic construction, concrete face rockfill dams have also developed rapidly. The application of concrete face rockfill dams has gradually been recognized by everyone for its advantages of simple construction, low cost, and short construction period. Although the new technology of concrete extrusion side walls has greatly reduced and reduced the interference of upstream slope construction, but , the selection of dam filling parameters is still the key to dam seepage prevention. The dam has multiple partitions. Nowadays, the same method is used for dam filling and rolling. Because the materials and thickness of different partitions are different, As a result, the strength of each partition is different, resulting in lo...

Claims

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Application Information

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IPC IPC(8): E02B7/06E02D17/18E02D3/02E02D3/046
CPCE02B7/06E02D3/02E02D3/046E02D17/18
Inventor 由淑明苗延强侯欢
Owner 中国安能集团第一工程局有限公司