Rock-soil body seepage experiment device

Abstract

The utility model discloses a rock-soil body seepage experiment device, and relates to the technical field of geotechnical engineering experiment equipment. The rock-soil body seepage experiment device comprises a cavity, wherein a rock sample is contained in the cavity; the seepage water connecting component is arranged above the cavity, the seepage water connecting component is of a cavity structure used for balancing seepage pressure, one side of the seepage water connecting component is connected with a water injection connector in a sealed mode, and a water injection opening is formed in the water injection connector; the seepage water guide pipe extends into the cavity from the water injection port and is used for providing seepage water for the rock sample in the cavity; wherein the seepage water connecting component is detachably connected with the seepage water guide pipe and can be connected with seepage water guide pipes with different diameters. The rock-soil body seepage experiment device can accurately measure the seepage characteristics of the rock-soil body, can replace seepage water guide pipes with different diameters, and can effectively balance pressure fluctuation.

Description

Technical Field

[0001] This utility model relates to the technical field of geotechnical engineering experimental equipment, specifically to a geotechnical seepage experimental device. Background Technology

[0002] In the field of rock and soil seepage experimental research, accurate measurement and analysis of the seepage characteristics of rock and soil masses are of paramount importance for numerous engineering practices, such as seepage control in dams of hydraulic engineering, groundwater resource development and protection, and reservoir seepage simulation in petroleum engineering. Traditional rock and soil seepage experimental apparatuses have many limitations in terms of seepage connection and measurement.

[0003] (1) Traditional seepage connection components often only have a single connection function and can only be adapted to specific specifications of conduits or equipment. When the experiment requires changing different types or specifications of seepage water conduits or connecting other measuring instruments, the entire connection component must be disassembled and replaced in a tedious manner. This not only consumes a lot of time and manpower, but the frequent disassembly and assembly process is also very likely to damage the sealing and stability of the experimental device, thereby affecting the accuracy and reliability of the experimental data.

[0004] (2) During the seepage process, due to the fluctuation of external water injection pressure and the complexity of the seepage channels inside the rock sample, the seepage pressure will change unstably. Traditional experimental devices lack an effective pressure fluctuation balancing mechanism, which causes the pressure fluctuation to be directly transmitted to the measuring equipment, resulting in a large error in the measured seepage data, making it difficult to accurately reflect the true seepage characteristics and laws of the rock and soil. Summary of the Invention

[0005] To address the aforementioned problems, this utility model aims to provide a soil and rock seepage test device that can accurately measure the seepage characteristics of soil and rock, allows for the replacement of seepage water conduits of different diameters, and can effectively balance pressure fluctuations.

[0006] The main idea of ​​the technical solution adopted in this utility model is to make the permeable water connecting component and the permeable water conduit detachable and replace the permeable water conduit with different diameters, so that the experimental device has high flexibility and can select a conduit with a suitable diameter to meet different permeation conditions and experimental requirements; by making the permeable water connecting component into a cavity structure, pressure fluctuations are buffered and pressure balance is promoted; by setting multiple inlets, the contact area between the permeable water and the rock sample is increased, thereby improving the uniformity and stability of the permeation.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A seepage test apparatus for soil and rock includes a cavity containing a rock sample;

[0009] A water-permeable connection component is disposed above the cavity. The water-permeable connection component is a cavity structure for balancing seepage pressure. A water injection connector is sealed to one side of the water-permeable connection component, and a water injection port is provided on the water injection connector.

[0010] A seepage water conduit extends into the cavity from the water inlet to provide seepage water to the rock sample inside the cavity;

[0011] The permeable water connecting component is detachably connected to the permeable water conduit, and can be connected to permeable water conduits of different diameters.

[0012] Furthermore, the portion of the seepage water conduit that extends into the cavity is provided with several seepage water inlets.

[0013] Furthermore, the gap between the cavity and the permeable water connecting component is provided with an adhesive material.

[0014] Furthermore, the above technical solution includes a flow regulating valve and a pressure sensor at the water inlet for precisely controlling the water flow rate and pressure and monitoring the water pressure.

[0015] Furthermore, the part of the water injection connector that connects to the water permeation connection component is provided with a sealing gasket and a sealing ring. The sealing gasket is arranged around the outer periphery of the water injection connector, and the sealing ring is nested inside the sealing gasket.

[0016] Furthermore, based on the above technical solutions, an expansion adhesive is also provided on the portion of the seepage water conduit that extends into the cavity.

[0017] Furthermore, the above technical solution further includes the following: the seepage water conduit is transparent and has scale markings on its outer wall.

[0018] The beneficial effects of this utility model are:

[0019] 1. By setting the seepage water connection component and the seepage water conduit to be detachable and adaptable to seepage water conduits of different diameters, the versatility and flexibility of the experimental device are improved. When conducting experiments on different types of soil and rock (such as sand and clay with large porosity differences) or different research purposes (such as focusing on the study of seepage velocity or seepage uniformity), the seepage water conduit of the corresponding specification can be easily replaced to meet the diverse experimental conditions without the need for complex modifications to the entire device.

[0020] 2. The part of the seepage water conduit that extends into the cavity is equipped with several seepage water inlets, which allows seepage water to enter the rock sample evenly from multiple locations. Compared with the case of a single inlet, it can avoid the problem of uneven seepage caused by too much or too little water in a local area, which is more in line with the real seepage state of rock and soil under natural conditions, and helps to obtain more representative and accurate experimental results.

[0021] 3. The permeable water connection component adopts a cavity structure to balance the seepage pressure. During the seepage process, it can effectively buffer the pressure changes caused by factors such as fluctuations in injection pressure and changes in the internal pore structure of the rock sample, so as to keep the seepage pressure relatively stable. This is conducive to accurately observing and analyzing the changes in the seepage characteristics of the rock sample over time and reducing data errors caused by pressure instability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the planar structure of this utility model;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the water injection connector structure of this utility model;

[0025] Figure 4 This is a schematic diagram showing the fit between the water injection connector and the seepage water conduit of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 6 This is a schematic diagram showing the connection relationship of the cavity in this utility model.

[0028] The components include: 1. cavity; 2. permeable water connection component; 3. water injection connector; 301. water injection hole; 4. water injection port; 5. sealing gasket; 6. sealing ring; 7. permeable water conduit; 8. permeable water inlet; 9. adhesive material; 10. expanding adhesive. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] The inventors discovered that traditional seepage connection components often only have a single connection function, can only be adapted to pipes or equipment of specific specifications, and are inconvenient to replace; traditional experimental devices lack an effective pressure fluctuation balancing mechanism, which causes pressure fluctuations to be directly transmitted to the measuring equipment end, resulting in large errors in the measured seepage data, making it difficult to accurately reflect the true seepage characteristics and laws of the rock and soil.

[0031] Based on the above findings, this application proposes a seepage test apparatus for soil and rock. By making the seepage water connecting component and the seepage water conduit detachable and adaptable to seepage water conduits of different diameters, the versatility and flexibility of the test apparatus are improved. The seepage water connecting component adopts a cavity structure to balance the seepage pressure, which can effectively buffer pressure changes caused by factors such as fluctuations in injection pressure and changes in the internal pore structure of the rock sample during the seepage process, thus keeping the seepage pressure relatively stable.

[0032] Example 1

[0033] See Figures 1-6 This application discloses a seepage test apparatus for soil and rock, including a cylindrical cavity 1 capable of holding a rock sample of sufficient volume for seepage experiments. The cavity 1 contains the rock sample, and a rock sample fixing support made of corrosion-resistant alloy material is provided inside the cavity 1. Multiple adjustable clamps fix the rock sample at the center of the cavity 1, ensuring that the rock sample does not shift during the experiment. A water infiltration connection component 2 is located above the cavity 1. The water infiltration connection component 2 adopts a cavity structure for balancing seepage pressure, effectively buffering pressure changes caused by factors such as fluctuations in injection pressure and changes in the internal pore structure of the rock sample during seepage, keeping the seepage pressure relatively stable and reducing data errors caused by pressure instability. A water infusion connector 3 is fixedly connected to one side of the water infiltration connection component 2. Preferably, a threaded connection or welding is used, and the connection between the water infiltration connection component 2 and the water infusion connector 3 is sealed. The water infusion connector 3 is made of copper alloy material, which has good thermal conductivity and corrosion resistance. At the connection point, the sealing ring 6 is nested inside the sealing gasket 5, and the sealing gasket 5 surrounds the outer periphery of the water injection connector 3. The water injection connector 3 is screwed into the connection hole of the water permeation connection component 2, so that the sealing gasket 5 and the sealing ring 6 are fully compressed to form a reliable seal and prevent high-pressure water leakage. The water injection connector 3 has a water injection port 4. The bottom of the water permeation connection component 2 is connected to the connection port at the top of the cavity 1. The connection is made using a flange connection, and the gap between the two is filled with adhesive material 9. Preferably, the adhesive material 9 is epoxy resin, which not only provides a sealing function but also enhances the stability of the connection between the water permeation connection component 2 and the cavity 1.

[0034] The water injection connector 3 is connected to a water injection port 4, at which a high-precision flow regulating valve and a pressure sensor are installed. The flow regulating valve is an electric regulating valve, whose opening can be precisely adjusted via a control console, with a control range of [0-100]%, enabling precise adjustment of the water injection flow. The pressure sensor is a high-precision piezoresistive pressure sensor, which can accurately monitor the water injection pressure in real time and transmit the data to the control console for display and recording. One end of the water injection connector 3 is connected to an external high-pressure water injection device through the water injection port 4, and the other end is sealed to the permeable water connection component 2.

[0035] The seepage water conduit 7 extends into the cavity 1 from the water inlet 4. Nine seepage water inlets 8 are evenly distributed on the portion of the seepage water conduit 7 extending into the cavity 1, allowing seepage water to enter the rock sample uniformly from multiple locations. The seepage water inlets 8 are circular, with chamfered edges to prevent scratching the rock sample. An expanding rubber 10 is also provided on the portion of the seepage water conduit 7 extending into the cavity 1. The expanding rubber 10 is made of water-swellable rubber. When the seepage water conduit 7 is installed, the expanding rubber 10 contacts the rock sample and expands upon contact with water, filling the tiny gaps between the conduit and the rock sample to form a good seal, ensuring that seepage water can only enter the rock sample through the seepage water inlets 8 during the seepage process. The seepage water conduit 7 is made of transparent plexiglass, and the outer wall of the conduit has clear graduation markings for observing and measuring the flow of seepage water within the seepage water conduit 7 and the depth of the conduit inserted into the cavity 1.

[0036] The water injection connector 3 has several water injection holes 301 of different diameters corresponding to the water injection port 4. Each water injection hole 301 has an internal thread, and the front end of the seepage water conduit 7 has an external thread that mates with the water injection hole 301. The seepage water conduit 7 and the seepage water connection component 2 are connected by a thread. Sealant is applied to the thread surface or sealing tape is wrapped around it to further enhance the sealing performance and effectively prevent seepage water leakage at the connection point. When it is necessary to replace the seepage water conduit 7 with a different specification or to maintain the conduit, simply unscrew the conduit in the reverse direction. For example, when studying the effect of different diameter conduits on seepage characteristics, seepage water conduits 7 of different diameters can be quickly replaced for comparative experiments.

[0037] In use, first place the prepared rock sample on the fixed support inside the cavity 1 and secure it firmly. Insert the seepage water conduit 7 into the cavity 1 through the water injection hole 301, and connect the water injection connector 3 to the external high-pressure water injection equipment. Turn on the control panel and set the initial water injection flow rate and pressure value. Start the high-pressure water injection equipment to begin injecting seepage water into the rock sample inside the cavity 1. Observe the water injection pressure and flow rate data in real time through the control panel. Adjust the water injection flow rate precisely using the flow regulating valve according to the experimental progress and needs, while closely monitoring the pressure sensor data to ensure that the water injection pressure is stable within the set range. During the experiment, observe the flow of seepage water through the transparent seepage water conduit 7, record the liquid level change of seepage water in the conduit, measure the seepage water flow rate through the scale markings, calculate the seepage flow rate based on the cross-sectional area of ​​the conduit, and compare and verify it with the flow rate data displayed on the control panel. Then, analyze and process the experimental data. When it is necessary to replace the seepage water conduit 7 with one of different diameters, simply unscrew the initial seepage water conduit 7 in the reverse direction and select the seepage water conduit 7 of the required diameter and insert it through the injection hole 301 of the corresponding diameter.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A rock-soil seepage experiment device, characterized in that, include: The cavity (1) contains rock samples; A water-permeable connection component (2) is disposed above the cavity (1). The water-permeable connection component (2) is a cavity structure for balancing the seepage pressure. A water injection connector (3) is sealed on one side of the water-permeable connection component (2). A water injection port (4) is provided on the water injection connector (3). The seepage water conduit (7) extends into the cavity (1) from the water inlet (4) and is used to provide seepage water to the rock sample in the cavity (1); The infiltration water connecting component (2) is detachably connected to the infiltration water conduit (7), and can be connected to infiltration water conduits (7) of different diameters.

2. The flow experiment apparatus of claim 1, wherein: The portion of the seepage water conduit (7) that extends into the cavity (1) is provided with several seepage water inlets (8).

3. The flow experiment apparatus of claim 1, wherein: A bonding material (9) is provided between the cavity (1) and the water-permeable connecting member (2).

4. The flow experiment apparatus of claim 1, wherein: The water inlet (4) is equipped with a flow regulating valve and a pressure sensor to precisely control the water flow and pressure and monitor the water pressure.

5. The flow experiment apparatus of claim 1, wherein: The part of the water injection connector (3) connected to the water permeation connection member (2) is provided with a sealing gasket (5) and a sealing ring (6). The sealing gasket (5) is arranged around the outer periphery of the water injection connector (3), and the sealing ring (6) is nested inside the sealing gasket (5).

6. The flow experiment apparatus of claim 1, wherein: The portion of the seepage water conduit (7) that extends into the cavity (1) is also provided with an expansion adhesive (10).

7. The flow experiment apparatus of claim 1, wherein: The seepage water conduit (7) is transparent and has scale markings on its outer wall.

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