Method for determining inferior limit of safety coefficient of abutment stability of arch dam

A technique of safety factor and determination method, which is applied to arch dams, dams, etc., and can solve problems such as unsatisfactory algorithms

Active Publication Date: 2013-03-13
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

Therefore, the existing algorithm is still not ideal

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  • Method for determining inferior limit of safety coefficient of abutment stability of arch dam
  • Method for determining inferior limit of safety coefficient of abutment stability of arch dam

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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0018] Look figure 1 and figure 2 , the method for determining the lower limit of the arch dam abutment stability safety factor of the present invention is implemented according to the following steps:

[0019] First of all, the basic data of the arch dam abutment should be collected. The basic data of the arch dam abutment include topographic line 1, arch dam upstream boundary line 2, arch dam downstream boundary line 3, bottom slip surface 4 inclination and dip angle, side slip surface 5. The parameter data of inclination and inclination angle. These data are mainly collected by using surveying and mapping instruments for outdoor operations. After inputting the data obtained from outdoor operations into computer software, the computer software is used to draw three-dimensional graphics containing the above data. The three-dimensional grap...

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Abstract

The invention discloses a method for determining inferior limit of safety coefficient of abutment stability of an arch dam. The method comprises the following steps: drawing a three-dimensional figure by using a computer, wherein the three-dimensional figure comprises a sliding block body (8), a sliding surface (7), a bottom sliding surface (4) and a side sliding surface (5); and calculating the inferior limit value of the safety coefficient of the abutment stability of the arch dam by a sliding block body three-dimensional limit balance algorithm through the volume of the sliding block body (8), the area of side sliding surface projection (9) and the area of bottom sliding surface projection (10), wherein the volume of the sliding block body (8) is obtained through the three-dimensional figure, the area of side sliding surface projection (9) is obtained through the area of vertical projection of the sliding surface (7) on the side sliding surface (5) along the vertical direction of the bottom sliding surface (4) and a ridge (6), and area of bottom sliding surface projection (10) is obtained through the area of vertical projection of the sliding surface (7) on the bottom sliding surface (4) along the vertical direction of the siding sliding surface (5) and the ridge (6). The method can reflect the true situation of the abutment stability of the arch dam accurately and is favorable for the safety of engineering design.

Description

technical field [0001] The invention relates to the technical field of dams, in particular to a method for determining the lower limit of the abutment stability safety factor of an arch dam. Background technique [0002] In the design of arch dams, it is generally necessary to examine the stability and safety of the abutment. The stability of the abutment means that the abutment mountain is cut by several groups of weak structural surfaces to form relatively independent sliding blocks. Under the action of load, the sliding block remains stable and does not slide downstream with a safety margin. However, in the preliminary design process of the arch dam, due to the limited exploration work, it is impossible to accurately grasp the specific position of each weak structural surface, which brings uncertainty to the stability calculation of the abutment. For the calculation of the abutment stability safety factor, the traditional algorithm generally assumes that the structural s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/12
Inventor 罗洪波徐林
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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