Ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method

A determination method and technology for earth-rock dams, which are applied in the field of foundation soil survey, dams, barrages, etc., can solve problems such as non-specificity and refinement, and achieve accurate results and simple effects.

Active Publication Date: 2014-04-09
POWERCHINA CHENGDU ENG
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  • Claims
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Problems solved by technology

Traditional approaches tend to be more general, not specific and detailed

Method used

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  • Ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method
  • Ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method
  • Ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method

Examples

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Embodiment 1

[0032] The Dadu River Changheba Hydropower Station is a super-high earth-rockfill dam built on a deep overburden layer with a height of 240m. The dam is a rockfill dam with a gravel soil core wall. Union soil yard. This example mainly illustrates the Tangba soil yard.

[0033] The stockyard is about 900m-1000m long along the river, 500-550m wide across the river, and has an area of ​​about 456,000m 2 , with a total reserve of 4.465 million m 3 (after excluding stones with a diameter greater than 150mm), most of them are shrubs, cultivated land and a small number of farmhouses. According to drilling and exploratory wells, the composition of the material source is relatively simple, most of which are ice-accumulated crushed gravel soil layers, only partly slope deposits, and the thickness varies greatly, generally about 7-16m thick, and the crushed gravel is composed of limestone. , marble, schist and quartz, mostly angular-subangular. Partial crushed stones or crushed grave...

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Abstract

The invention discloses an ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method and relates to the field of water-power engineering. The ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method can accurately determine a zone with the P5 content range between 30% and 50%. The ultrahigh earth and rockfill dam seepage-proof earth material surveying and determining method includes the following steps that the content of particles with the granular diameter which is larger than 5mm in different depths at multiple surveying points are surveyed in a seepage-proof earth material field; a level map and a profile map of the material field are drawn, all the surveying points are marked on the level map and the profile map of the material field and the content of the particles with the granular diameter larger than 5mm of all points is marked; a smooth curve is used for connecting all the qualified points and the curve is a contour line of the content of the particles with the diameter larger than 5mm. The contour line or the zone defined by the contour line and boundaries of the level map and the profile map is the zone of which the content of the particles with the granular diameter larger than 5mm is qualified. By drawing the contour line, the zone of which the content of the particles with the granular diameter larger than 5mm is qualified is obtained. Overall surveying and evaluation on the seepage-proof earth material field are facilitated.

Description

technical field [0001] The invention relates to the field of hydropower engineering, in particular to a method for surveying and determining anti-seepage soil materials of super-high earth-rock dams. Background technique [0002] Super-high earth-rock dam refers to an earth-rock dam whose dam height is higher than 200m. The gravel earth core dam is a dam made of local materials, and its major feature is to maximize the use of local natural materials. Natural gravel soil materials are often unevenly graded and distributed, and super-high earth-rock dams have strict requirements on the gradation of anti-seepage soil materials. Generally, the content of particles larger than 5mm in the soil material (hereinafter referred to as P5 content) ranges from 30 to 50%. The higher the P5 content, the anti-seepage performance and compaction performance of the soil material often fail to meet the requirements, and the lower the P5 content, the soil material mechanical properties cannot m...

Claims

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Application Information

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IPC IPC(8): E02D1/00E02B7/06
Inventor 胡金山郝元麟张世殊黄润太张安川何顺宾陈卫东闵勇章凡亚
Owner POWERCHINA CHENGDU ENG
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