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Method for calculating united sliding-resistant stability of dam and force-resisting mountain body

A calculation method, anti-skid and stable technology, applied in the direction of calculation, design optimization/simulation, marine engineering, etc., can solve the problems of large modeling workload, cumbersome, time-consuming results sorting, etc.

Inactive Publication Date: 2016-08-10
POWERCHINA CHENGDU ENG
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  • Application Information

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Problems solved by technology

However, the finite element method has a large modeling workload, which is quite time-consuming and cumbersome to sort out the results.

Method used

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  • Method for calculating united sliding-resistant stability of dam and force-resisting mountain body
  • Method for calculating united sliding-resistant stability of dam and force-resisting mountain body
  • Method for calculating united sliding-resistant stability of dam and force-resisting mountain body

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Embodiment approach

[0069] figure 2 It is a cross-sectional view of the retaining dam section of a certain project, and the retaining dam is closely connected with the downstream mountain. The retaining dam is 186m high, and the volumetric weight of the dam is 24kN / m 3 , the upstream water head is 182m, the downstream water level is lower than the elevation of the foundation surface, the silt height is 66m, the horizontal foundation surface is Class II rock, and the resistance mountain is class III 1 The toe platform of the downstream dam is 20m high. The shear parameters (f', c') of the foundation surface AB and the mountain contact surface BC are (1.1, 1.1MPa) and (1.0, 0.9MPa) respectively. The grouting curtain is 14.5m away from the dam heel, and the uplift pressure reduction factor is 0.35. The design earthquake acceleration is taken as 0.3g. All other loads are ignored.

[0070] 1. Known load calculation:

[0071] According to the code, the known loads on the dam are solved, as shown...

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Abstract

The invention belongs to the technical field of instability risk decision of a dam in water conservancy and hydropower engineering and provides a novel method for calculating united sliding-resistant stability of the dam and a force-resisting mountain body in order to overcome defects in calculation and analysis of the combined action of the dam and the force-resisting mountain body in the traditional technology. According to the method, the sliding-resistant stability of the concrete gravity dam under the action of the force-resisting mountain body is quantified accurately, reasonably and efficiently, and important basis is provided for structural design, reinforcement, optimization, safety evaluation, risk control and the like of dam sliding resistance assisted with downstream resistance blocks. The method comprises following steps: a, force analysis of the combined action of the dam and the force-resisting mountain body is performed; b, a mechanical equation for the united sliding-resistant stability of the dam and the force-resisting mountain body is established; c, mathematical analysis and mechanical assumption are performed on the equation; d, a limit equilibrium principle is adopted to solve a sliding-resistant stability safety factor. The calculating method is utilized to evaluate dam foundation stability, a process is simple and easy to understand, and the evaluation standard is adaptive to the specifications.

Description

technical field [0001] The invention belongs to the technical field of dam instability risk decision-making in water conservancy and hydropower projects, and in particular relates to a calculation method for combined anti-sliding stability of a dam and a resistant mountain. Background technique [0002] Anti-sliding stability is one of the most important issues for concrete hydraulic structures. Conventional anti-sliding stability calculations are detailed in the design specifications for gravity dams and gate dams. As for the retaining dam section of the bank slope or the water retaining structure of the water intake, it is often encountered that the hydraulic structure is closely integrated with the downstream mountain. In fact, using the downstream resistance body to assist the dam in anti-sliding is a commonly used treatment measure to improve the anti-sliding stability of the project. [0003] Due to the joint action with the mountain body, the stress conditions of th...

Claims

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Application Information

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IPC IPC(8): G06F17/50E02B7/00
CPCE02B7/00G06F30/13G06F30/23
Inventor 彭文明
Owner POWERCHINA CHENGDU ENG
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