A Simulation Method of Dam Abutment Deformation Based on Body Force Application

Abstract

The invention provides a method for simulating the deformation of the abutment based on body force, which includes: arranging horizontal deformation measuring points on the left and right abutments before the dam is poured; monitoring the horizontal deformation of all measuring points in the direction of the vertical river, and obtaining the time t at different time nodes The measured deformation values ​​of all measuring points; according to the terrain and geological conditions, the finite element grid model is established; based on the finite element grid model, the body force is applied to the left and right banks of the abutment rock mass at time t, and the deformation value is calculated; Adjust the body force of each region according to the error between the measured value and the calculated value to obtain the regional body force smaller than the allowable error, and calculate the deformation value of the dam abutment at time t; obtain the deformation value at the typical time; consider the deformation value at the typical time, Carry out numerical simulation analysis of dam working behavior. The invention can accurately, simply and conveniently simulate the deformation of the dam abutment slope, so as to accurately evaluate the influence of the deformation of the dam abutment slope on the working behavior and safety of the dam.

Description

technical field

[0001] The invention belongs to the technical field of water conservancy and hydropower, and in particular relates to a method for simulating deformation of a dam abutment based on body force application. Background technique

[0002] In the design and analysis of arch dams, it is generally considered that the geological conditions are good, the abutment bedrock is stable, and the horizontal deformation in the direction vertical to the river is small. When the value is set to 0, the abutment only deforms under the loads such as water pressure, temperature and thrust of the arch end. However, with the impoundment operation of Xiluodu Arch Dam and Jinping I Arch Dam, etc., the deformation monitoring results of the dam abutment show that in addition to the deformation caused by the above loads, there are other large horizontal deformations towards the river bed, which will affect the dam. Impact on work performance and safety.

[0003] The ideal simulation met...

Examples

Embodiment

[0050] An arch dam with a dam height of 305m is located in the southwest of my country. The geological conditions on the left bank are average. During the construction and operation, horizontal deformation will occur, which will affect the working performance of the dam. It is necessary to investigate the influence of the deformation of the left bank abutment on the working performance of the dam. analyze.

[0051] Step 1: Set the horizontal deformation measuring point grid according to the topographic and geological conditions of the left bank, such as figure 2 , the specific measuring point location is as figure 2 shown;

[0052]Step 2: Obtain the deformation value by monitoring, the representative monitoring value is shown in Table 1, and the monitoring frequency is 1 time / month;

[0053] Step 3: Carry out regional division according to topographic and geological conditions, etc., a total of 6 regions, and establish a finite element grid such as image 3 ;

[0054] Ste...

technical field

[0001] The invention belongs to the technical field of water conservancy and hydropower, and in particular relates to a method for simulating deformation of a dam abutment based on body force application. Background technique

[0002] In the design and analysis of arch dams, it is generally considered that the geological conditions are good, the abutment bedrock is stable, and the horizontal deformation in the direction vertical to the river is small. When the value is set to 0, the abutment only deforms under the loads such as water pressure, temperature and thrust of the arch end. However, with the impoundment operation of Xiluodu Arch Dam and Jinping I Arch Dam, etc., the deformation monitoring results of the dam abutment show that in addition to the deformation caused by the above loads, there are other large horizontal deformations towards the river bed, which will affect the dam. Impact on work performance and safety.

[0003] The ideal simulation met...

Examples

Embodiment

[0050] An arch dam with a dam height of 305m is located in the southwest of my country. The geological conditions on the left bank are average. During the construction and operation, horizontal deformation will occur, which will affect the working performance of the dam. It is necessary to investigate the influence of the deformation of the left bank abutment on the working performance of the dam. analyze.

[0051] Step 1: Set the horizontal deformation measuring point grid according to the topographic and geological conditions of the left bank, such as figure 2 , the specific measuring point location is as figure 2 shown;

[0052]Step 2: Obtain the deformation value by monitoring, the representative monitoring value is shown in Table 1, and the monitoring frequency is 1 time / month;

[0053] Step 3: Carry out regional division according to topographic and geological conditions, etc., a total of 6 regions, and establish a finite element grid such as image 3 ;

[0054] Ste...

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