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Rock-fill dam rheological numerical simulation method considering hydraulic coupling effect

A numerical simulation, hydraulic coupling technology, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., can solve problems such as less involved

Pending Publication Date: 2021-11-09
XIAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, little research has been done on the effect of seepage on the rheological properties of overburden sand and gravel and rockfill materials.

Method used

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  • Rock-fill dam rheological numerical simulation method considering hydraulic coupling effect
  • Rock-fill dam rheological numerical simulation method considering hydraulic coupling effect
  • Rock-fill dam rheological numerical simulation method considering hydraulic coupling effect

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Embodiment Construction

[0124] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0125] The present invention considering rockfill rheology numerical simulation hydraulic coupling effect, combined attachment Figure 1 ~ 3 Flowchart as Image 6 As shown, specifically, according to the following steps:

[0126] Step 1, to carry out Considering Seepage rockfill rheology experiment, comparative analysis of the experimental results under different rheological seepage water pressure, on consideration of seepage existing rheological model rheological test method by numerical simulation results rockfill adaptability verification function, exponential decay curve as the selected rheological model, correcting the rheological model based on experimental results, the iterative method based on implicit integration, the flow rule to obtain equation, equation and hardening consistency equation, bulk solids, rigid anti permeable body, and consti...

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Abstract

The invention discloses a rock-fill dam rheological numerical simulation method considering a hydraulic coupling effect, which comprises the following steps: firstly, carrying out a rock-fill dam rheological experiment considering a seepage effect, and then simulating an unstable seepage process of a rock-fill dam and a foundation by adopting a parabolic Signorini type variational inequality method. In order to overcome the defect that overflow points of a potential seepage surface are unstable in a free surface iteration step in a seepage process, a parabolic Signorini type variational inequality method with an adaptive penalty Heaviside function is adopted to eliminate singularity of seepage overflow points, and accurate positioning of unstable seepage overflow points and free surface points is realized; and through the deformation field and the seepage field, a deformation and seepage coupling control equation is established, a relationship between the change of the porosity and the volume strain is established, and finally a rock-fill dam rheological numerical simulation result considering the hydraulic coupling effect is obtained. The rheological mechanism of the concrete faced rock-fill dam under the seepage action is disclosed, and theoretical basis and technical support are provided for construction of the concrete faced rock-fill dam.

Description

Technical field [0001] The present invention belongs to the field of numerical simulation rockfill rheology, particularly relates to a numerical simulation rockfill considering rheological hydraulic coupling effect. Background technique [0002] Rockfill dam deformation depends rockfill impermeable material deformation, rockfill deformation is too large, the panel would crack, thus affecting its barrier properties, and even endanger the stability of the dam. Therefore, surface engineering of dam safety is ultimately a deformation of rockfill. - deformation comprises deformation instantaneous deformation and aging, the former by the dam and cause water weight load, after which the dam reservoir rheological modification. Deformation monitoring results have shown that faced rockfill dam was built, as an important part of creep deformation of rockfill dam deformation, is the main cause of long-term dam body deformation and seepage failure. For the construction of the high cover panel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/28G06F111/10G06F119/14
CPCG06F30/23G06F30/28G06F2111/10G06F2119/14
Inventor 温立峰吴莉李炎隆
Owner XIAN UNIV OF TECH
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