Manufacture method of large-scale geomechanical model

Abstract

The invention discloses a manufacture method of a large-scale geomechanical model. The method comprises the following steps of: (1) pressing prefabricated standard modules; (2) numbering the pressed prefabricated standard modules respectively and making a design drawing with standard modules being assembled into a model; (3) according to the design drawing, employing a caking agent in order to build the standard modules into a shape; (4) introducing a measuring line on a measuring element out of a model body and to connected with measurement equipment. According to a geomechanical model prefabricated standard module building forming method, the production process of a large-scale true three-dimensional mechanical model is improved, serious stratification of enclosing rocks and a deviation phenomenon of pre-buried measurement element caused by stratification molding in a present geomechanical model manufacture process are overcome, and the manufacture quality of the model is improved. The method has the advantages of high efficiency, being fast and economic, simple operation of equipment, uniform model entity, capability of scaled standardized production and the like, and the high quality operation of a three-dimensional mechanical model experiment is effectively ensured.

Description

technical field [0001] The invention relates to a method for making a large-scale geomechanical model, in particular to a method of masonry molding using prefabricated standard modules. Background technique [0002] With the rapid development of transportation infrastructure and the vigorous development of underground resources development, underground structures have been widely used in the fields of hydropower, transportation, resources, and energy. At the same time, the construction safety of underground cavern engineering has also received more and more attention and attention. With the increase of the buried depth of the underground engineering and the improvement of the engineering scale, the engineering geological conditions and hydrogeological conditions of the rock mass in the proposed underground engineering area are also becoming more and more complicated. The experiment is carried out to analyze and evaluate the stability of the surrounding rock of the undergroun...

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Problems solved by technology

The traditional method leads to a series of disadvantages: when the model is made by the layered casting method, similar materials are sealed in the model frame, and the internal cement is difficult to volatilize, so that the upper surface of the poured material layer has reached the strength index, but its interior is damp , weak, two adjacent layers of materials are delaminated, which affects the mechanical parameters of the model as a whole, and finally makes the model body not meet the design requirements; and the tamping method is difficult to ensure that the forces on different parts are even and equal, so it seriously affects the uniformity and parameters of the model body authenticity

This method adopts pouring molding, the cement is difficult to volatilize, and the uniformity of the overall structure of the model and the consistency of mechanical properties cannot be guaranteed

[0007] (3) "Journal of Rock Mechanics and Engineering" No. 9, 2006 introduced a bifurcated tunnel model manufacturing method, which uses manual tamping, which cannot guarantee the uniformity of the overall structure of the model and the consistency of mechanical properties

This method adopts a large-area layered pressing model, which leads to size effect; and the material is placed in the model body, and the cement is difficult to volatilize, resulting in layering, which cannot guarantee the uniformity of the model body and the consistency of mechanical properties; The measuring components of the model will be offset during the continuous pressing process, which will distort the designed measuring parts and affect the accuracy of the model measurement data

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