A Calculation Method for Crest Superelevation of Earth-rock Dam with Core Wall
An earth-rock dam, superelevation technology, applied in dams, barrages, barrages, etc., can solve the problems of complicated calculation and no unified calculation method, and achieve the effect of simple calculation, high reliability and easy construction.
Active Publication Date: 2021-07-30
POWERCHINA ZHONGNAN ENG
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[0003] At present, there is no unified calculation method for the structure and calculation method of the settlement superelevation of the core earth-rock dam crest. Usually, the settlement superelevation of each dam section is determined according to the results of the finite element settlement calculation, and the calculation is relatively cumbersome.
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[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0016] see Figure 1-3 , the core wall earth-rock dam includes core wall 1, transition material 2 and rockfill area 3. During the construction of the core wall earth-rock dam, it is necessary to determine the upstream slope change line 4, the downstream slope change line 5 and the top slope change line of the core wall earth-rock dam in advance. 6 trajectory, so that the core wall earth-rock dam construction and settlement can meet the design requirements.
[0017] Taking a certain reservoir as an example: the maximum dam height ▽ of a certain reservoir is 60m, and the dam height with 1% of the maximum settlement value is 0.6m, namely H1m=0.6m;
[0018] The upstream original dam slope ratio m1=2.15, the downstream original dam slope ratio m2=1.9, assuming that the upstream dam slope ratio is m1’=1.95 and the downstream dam slope is m2’=1.75 after considering...
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The invention discloses a method for calculating the superelevation of the crest of an earth-rock dam with a core wall. The superelevation structure of the crest of an earth-rock dam with a core wall includes an upstream slope change line, a downstream slope change line and a top slope change line; mainly including the steps of establishing a three-dimensional coordinate system, Calculate the coordinate step of the upstream variable line and the apex of the downstream variable line, calculate the trajectory equation step of the upstream variable line and the downstream variable line, and calculate the trajectory equation step of the top variable line, through the two dam heads and the upstream variable line vertex Or the three coordinate points of the apex of the upstream variable slope line can obtain the trajectory equations of the upstream variable slope line and the downstream variable slope line, and the trajectory equation of the top variable slope line can be obtained through the two dam heads and the three coordinate points of the apex of the top variable slope line. The invention is simple in calculation and does not need to perform complex finite element calculations; it has high reliability and calculates the settlement position of each part according to the characteristics of the dam settlement; it is convenient for construction and positioning, and the position of each contour point of any section can be determined according to the parabolic trajectory equation ( coordinates), which is convenient for construction.
Description
technical field [0001] The invention relates to a method for calculating the superelevation of the crest of an earth-rock dam with a core wall, belonging to the technical field of water conservancy and hydropower. Background technique [0002] The design elevation of the crest of an earth-rockfill dam with a core wall refers to the elevation calculated in accordance with the "Code for Design of Roller-Compacted Earth-rockfill Dams", which refers to the elevation after the settlement is completed. Because the dam body will settle due to its own weight during the filling process or within a period of time after the completion of the filling, it is necessary to reserve a settlement superelevation on the basis of the design elevation during the construction process to meet the later stage. Design elevation requirements. [0003] At present, there is no unified calculation method for the superelevation structure and calculation method of the crest of earth-rock dams with core wa...
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IPC IPC(8): E02B7/06
CPCE02B7/06
Inventor 胡娟刘昊李兆进周跃飞
Owner POWERCHINA ZHONGNAN ENG