Rock similar to pore rock mass and uses for experiments, and production method thereof

A testing and porosity technology, which is applied in the field of geotechnical engineering, can solve the problems of large similarity ratio, low strength of similar rock samples, and small elastic modulus of similar materials, and achieves high compressive strength, wide application range and simple operation method. Effect

Inactive Publication Date: 2017-10-03
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using similar materials to simulate rock mass and conduct similar simulation tests, materials such as cement and gypsum are often used for preparation, resulting in the preparation of similar rock samples with low strength, which is inconsistent with the actual engineering. In addition, the similarity ratio is large and the elasticity of similar materials For problems such as small modulus, there are few studies on similar materials and model tests with a high degree of similarity to the original rock

Method used

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  • Rock similar to pore rock mass and uses for experiments, and production method thereof
  • Rock similar to pore rock mass and uses for experiments, and production method thereof
  • Rock similar to pore rock mass and uses for experiments, and production method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0018] The invention discloses a method for preparing similar rocks with porous rock masses for testing, comprising the following steps: weighing raw materials according to the formula; mixing the quartz sand, cement and permeable concrete reinforcing agent uniformly; gradually adding water and stirring evenly; putting the mixture into a mold Compaction molding; demoulding maintenance.

[0019] In the method of the invention, the raw materials are all measured by weight, and the allowable deviation of the measurement is: ±1% of cement, ±1% of quartz sand, ±1% of water and permeable concrete reinforcing agent. The preparation process of the mixture is as follows: first pour the quartz sand, cement and permeable concrete reinforcing agent with the formula content into the mixing pot and mix evenly, then gradually add water and stir until uniform. Or, according to the recipe, mix quartz sand, cement and permeable concrete reinforcement and mix in a concrete or mortar mixer, gradu...

Embodiment 1

[0022] Example 1, the raw materials used are: quartz sand with a particle size of 1.0-1.4 mm; clean water; P.O. 42.5 ordinary Portland cement; permeable concrete reinforcing agent.

[0023] Weigh 1200kg / m 3 Quartz sand, 260kg / m 3 Cement, 112kg / m 3 Water and 20kg / m 3 Permeable concrete enhancer, after mixing quartz sand, cement and permeable concrete enhancer in a concrete mixer, gradually add water and stir evenly, put the mixture into the mold in layers, the amount of each layer is roughly the same, wait for each After the layer mixture is loaded into the mold, it is compacted with a compactor according to the same compaction degree each time, and the surface is smoothed, and then the mixture is pressed with high pressure to make it densely formed in the mold. After the constant temperature and humidity standard curing and grinding are completed, the similar rock samples of the porous rock mass are obtained. The physical properties of the obtained samples are shown in Tabl...

Embodiment 2

[0026] In Example 2, the raw materials used are: quartz sand with a particle size of 0.1mm≤particle size<2mm; clean water; P.O.52.5 ordinary Portland cement; permeable concrete reinforcing agent.

[0027] Weigh 1520kg / m 3 Quartz sand, 310kg / m 3 Cement, 132kg / m 3 Water and 20kg / m 3 Permeable concrete enhancer, pour quartz sand, cement and permeable concrete enhancer into a mixing pot and mix well, then gradually add water and stir until uniform, then put the mixture into a mold and place it on a press at a constant pressure of 5MPa After the pressure is pressed to a compact state and the surface is formed, the surface is smoothed. After the mold is removed and the high temperature curing is completed, the similar rock prepared is placed on a grinder and ground to ensure that the upper and lower end faces are ground flat and parallel to the upper and lower end faces. The physical properties of the obtained samples are listed in Table 2.

[0028] performance

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Abstract

The invention relates to a rock similar to pore rock mass and uses for experiments, wherein the rock comprises 1200-2400 kg/m<3> of quartz sand, 260-390 kg/m<3> of cement, 102-178 kg/m<3> of water and 8-32 kg/m<3> of a water permeable concrete reinforcement agent. The preparation method comprises: weighing the raw materials according to the formula, uniformly mixing the quartz sand, the cement and the water permeable concrete reinforcement agent, gradually adding the water, uniformly stirring, loading the mixture into a mold, carrying out compaction molding, removing the mold, and curing. According to the present invention, the similar simulation requirements of different types of rock masses can be met by changing the ratio of the components, such that the difficulty of the geomechanical model test research work can be substantially simplified; the complete stress-strain process and the similar water-physical property of the similar rock and the virgin rock can be achieved, and the problem that the model test is used to reveal the underground structure and water-rich rock mass solid-liquid coupling failure damage mode can be solved; and the operation method is simple, efficient and rapid, the complicated post-treatment process does not exist, and the advantages of safety, no toxicity and wide application rage are provided.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and relates to a pore rock similar rock artificially prepared in a laboratory, in particular to a pore rock similar rock for testing and a manufacturing method thereof. Background technique [0002] Driven by the strong demand for resource development, transportation construction, and national defense construction, underground projects such as mine shafts, hydraulic tunnels, railway tunnels, highway tunnels, and underground military projects in China are all showing a trend of deeper underground development. As the buried depth of underground engineering increases, some factors that are not obvious in the shallow part gradually become prominent. Among them, high-pressure groundwater is one of the major challenges encountered in the construction and operation of underground engineering. [0003] In the past, it was believed that the construction and maintenance of underground engineering in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00991C04B2201/50C04B14/06C04B2103/0068
Inventor 韩涛杨维好黄家会朱艳州
Owner CHINA UNIV OF MINING & TECH
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