Grouting model testing device

Abstract

The utility model belongs to the technical field of geotechnical engineering, and particularly relates to a grouting model testing device. The utility model provides a grouting model test device, which comprises a grouting device main body, a grouting pipe and a data acquisition part, the grouting device main body is a hollow cavity, and the grouting pipe and the data acquisition part are arranged in the grouting device main body; the grouting device body comprises bottom plates, side plates and connecting frames, a plurality of drainage holes are formed in the bottom plates and / or the side plates, the four edges of the bottom plates are connected with the side plates respectively, the inner connecting faces of the adjacent bottom plates and / or the bottom plates and the side plates are connected through the connecting frames, and positioning pipelines for geological radar detection are arranged on the bottom plates. According to the technical scheme, the connecting frame used for connecting the bottom plate and the side plate of the grouting device body is installed in the connecting face, installation can be completed in the grouting device body during installation, the size of a pit needed during installation is effectively reduced, and installation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical engineering, and particularly relates to a grouting model test device. Background Technique

[0002] The grouting technology is an engineering technology with strong practicability and wide application range, and is widely used in construction engineering fields such as mining engineering, tunnel engineering, municipal engineering, slope engineering, foundation treatment of structural engineering, and geothermal engineering.

[0003] The grouting experimental research is one of the main ways of grouting technology research. In addition to in-situ experiments and laboratory experiments, model experiments are also commonly used experimental methods. However, the production of model experimental devices, especially the production of large-scale model experimental devices, is one of the problems that need to be solved. When simulating in-situ grouting splitting and penetration experiments, the test device needs to occupy a large volume of space, and a large pit needs to be dug in the soil to place the test equipment. At the same time, the installation and placement of the test equipment are also extremely inconvenient. In addition, the internal situation of the soil after grouting reinforcement can be detected by geological radar detection technology, which has been applied in actual grouting projects, but there is no research on the combination of grouting model experiments and geological radar detection, and the research depth of detecting grouted reinforcement by geological radar needs to be improved. For example, the dielectric constant of the soil before and after grouting, the characteristics of radar images, and the changes need to be further studied.

[0004] Therefore, it has become an urgent problem for those skilled in the art to develop a grouting model test device to solve the technical defect that the device for simulating in-situ grouting splitting and penetration experiments in the prior art is inconvenient to install and place in the soil, and at the same time can meet the needs of geological radar detection research on grouted soil reinforcement. Content of the Utility Model

[0005] Based on this, in view of the technical defect that the device for simulating in-situ grouting splitting and penetration experiments in the prior art is inconvenient to install and place in the soil, and at the same time can meet the needs of geological radar detection research on grouted soil reinforcement, it is necessary to provide a grouting model test device.

[0006] The utility model provides a grouting model test device, which includes: a grouting device main body, a grouting pipe, and a data acquisition part. The grouting device main body is a hollow cavity, and the grouting pipe and the data acquisition part are arranged inside the grouting device main body;

[0007] The grouting device main body includes: a bottom plate, side plates, and a connecting frame. The bottom plate and / or the side plates are provided with a plurality of drainage holes. The four sides of the bottom plate are respectively connected to the side plates, and the inner connection surfaces of the adjacent bottom plate and / or the bottom plate and the side plates are connected by the connecting frame.

[0008] In one embodiment, the grouting model test device further includes: a tightening part, and the tightening part is sleeved outside the side wall surface of the grouting device main body.

[0009] In one embodiment, the grouting test device further includes: a filter screen, and the filter screen is arranged at the drainage hole and is used to prevent solid substances in the grouting slurry from flowing out through the drainage hole.

[0010] In one embodiment, the data acquisition part includes: a positioning pipe and a pressure collector. The positioning pipe is arranged on the bottom plate, and the pressure collector is arranged inside the grouting device main body.

[0011] In one embodiment, the number of the positioning pipes is more than one.

[0012] In one embodiment, the grouting model test device further includes: a water outlet collection part. The water outlet collection part includes: a joint and a drain pipe, and the drain pipe is connected to the drainage hole through the joint.

[0013] In one embodiment, the grouting model test device further includes: a grouting hose. One end of the grouting hose is connected to the grouting pipe, and the other end of the grouting hose is externally connected to a grouting device.

[0014] In one embodiment, the connecting frame is a triangular connecting frame.

[0015] In one embodiment, the connecting frame, the bottom plate and the side plate are all preset with installation screw holes.

[0016] In one embodiment, an adhesive layer is provided at the connection between the bottom plate and the side plate.

[0017] In summary, the present utility model provides a grouting model test device, including: a grouting device main body, a grouting pipe, and a data acquisition part. The grouting device main body is a hollow body, and the grouting pipe and the data acquisition part are arranged inside the grouting device main body; the grouting device main body includes: a bottom plate, side plates, and a connecting frame. The bottom plate and / or the side plates are provided with a plurality of drain holes. The four sides of the bottom plate are respectively connected to the side plates, and the inner connecting surfaces of the adjacent bottom plate and / or the bottom plate and the side plates are connected by the connecting frame. In the technical solution provided by the present utility model, the connecting frame for connecting the bottom plate and the side plates of the grouting device main body is installed inside the connecting surface, and the installation can be completed inside the grouting device main body during installation, effectively reducing the volume of the pit required for installation, and the installation is convenient; for the data acquisition part, the positioning pipe is used for geological radar detection research, and the earth pressure collector can monitor the changes of the earth pressure at different positions during the grouting process in real time. A grouting model test device provided by the present utility model solves the technical defect that in the prior art, there are great inconveniences in installing and placing the device for simulating in-situ grouting splitting and penetration experiments in the soil, and at the same time, it can also meet the needs of geological radar detection research for grouting and strengthening soil masses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0019] Figure 1 FIG. is a schematic structural diagram of a grouting model test device in the technical solution provided by the embodiments of the present utility model;

[0020] Figure 2 FIG. is a top view of a grouting model test device in the technical solution provided by the embodiments of the present utility model;

[0021] Figure 3 FIG. is a partially enlarged schematic view of a grouting model test device in the technical solution provided by the embodiments of the present utility model;

[0022] Wherein, the grouting device main body 1, the bottom plate 11, the side plates 12, the connecting frame 13, the filter screen 14, the grouting pipe 2, the large-diameter metal positioning pipe 311, the small-diameter metal positioning pipe 312, the large-diameter non-metal positioning pipe 313, the small-diameter non-metal positioning pipe 314, the pressure collector 32, the tightening part 4, the drain hole 5, and the installation screw hole 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] An embodiment of the present utility model provides a grouting model test device, which is used to solve the technical defect that in the prior art, there are great inconveniences in installing and placing the device for simulating in-situ grouting splitting and infiltration experiments in soil.

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0027] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0030] Please refer to Figure 1 and Figure 2 , an embodiment of the present utility model provides a grouting model test device, including: a grouting device main body 1, a grouting pipe 2 and a data acquisition unit. The grouting device main body 1 is a hollow cavity body, and the grouting pipe 2 and the data acquisition unit are disposed inside the grouting device main body 1; the grouting device main body 1 includes: a bottom plate 11, side plates 12 and a connecting frame 13. The bottom plate 11 and / or the side plates 12 are provided with a plurality of drainage holes 5. The four sides of the bottom plate 11 are respectively connected to the side plates 12, and the inner connecting surfaces of the adjacent bottom plates 11 and / or the bottom plate 11 and the side plates 12 are connected by the connecting frame 13. The grouting model test device provided by the embodiment of the present utility model solves the technical defect that in the prior art, the device for simulating in-situ grouting splitting and penetration experiments is inconvenient to install and place in the soil.

[0031] The grouting model test device provided by the embodiment of the present utility model is placed entirely in a pit dug in the soil for grouting tests. Through the grouting pipe 2, grouting tests are carried out into the grouting device main body 1, and the data acquisition unit disposed inside the grouting device main body 1 performs data acquisition work during the tests.

[0032] When installing the grouting model test device, the bottom plate 11 is connected to the side plate 12, and the bottom plate 11 is connected to the bottom plate 11 through the connecting frame 13. At this time, since the connecting frame 13 is arranged on the inner connecting surface of the hollow cavity, there is no need to set up additional installation space. Technicians can complete the installation by standing and operating inside the hollow cavity. Only a space approximately the same size as the main body 1 of the grouting device needs to be dug in the soil to place the grouting model test device, without the need to dig an additional space in the soil for the installation of the test device, effectively saving space and facilitating the installation and placement of the grouting model test device.

[0033] Compared with the scheme of installing the grouting device and then putting it into the experimental pit, additional large equipment such as forklifts and cranes are required to put it into the test pit after installation. The operation is also complex and the cost is relatively high.

[0034] Furthermore, to optimize the technical solution and effectively improve the structural stability of the grouting model test device and prevent the grouting model test device from cracking during the pressurized grouting process, a grouting model test device provided by an embodiment of the present invention further includes: a tightening part 4, and the tightening part 4 is sleeved outside the side wall surface of the grouting device main body 1. By tightening the outside of the grouting device main body 1 through the tightening part 4, the structural stability of the grouting device main body 1 is further improved.

[0035] A grouting model test device provided by an embodiment of the present invention further includes: a filter screen 14, and the filter screen 14 is arranged at the drain hole 5 to prevent solid substances in the grouting slurry from flowing out through the drain hole 5. The filter screen 14 can effectively prevent mud and sand in the grouting from flowing out through the water outlet, preventing the outflow of mud and sand from affecting the grouting effect. Under the action of the filter screen 14, only water can flow out of the water outlet, and the aperture of the water outlet can be set relatively large to ensure rapid and efficient water discharge.

[0036] In the technical solution provided by an embodiment of the present invention, the data acquisition part includes: a positioning pipe and a pressure collector 32. The positioning pipe is arranged on the bottom plate 11, and the pressure collector 32 is arranged inside the grouting device main body 1.

[0037] The positioning pipe can be detected by a ground penetrating radar, and the ground penetrating radar detection positioning pipe and the soil radar images before and after grouting can be analyzed to provide data and research basis for the radar detection of the actual grouting reinforcement project.

[0038] The pressure collector 32 can be buried at different grouting depths, and the data collection module of the external pressure collector 32 is used to collect the pressure data at different grouting depths.

[0039] To further optimize the technical solution and improve the accuracy of the positioning tube data collection results, the number of positioning tubes is greater than 1. According to the needs of geological radar detection, the materials, diameters, and lengths of the positioning tubes are different. The materials can be either metal or non-metal. The diameter can be designed in two different sizes according to the needs of geological radar detection, and the length can be as long as possible. At the same time, the positioning tubes should be perpendicular to the radar detection direction. The dielectric constants obtained from the positioning tubes with different lengths, diameters, and materials are averaged to calculate a more accurate data collection result.

[0040] As Figure 2 shown, the positioning tube can include any one or more of a large-diameter metal positioning tube 311, a small-diameter metal positioning tube 312, a large-diameter non-metal positioning tube 313, and a small-diameter non-metal positioning tube 314.

[0041] The grouting model test device provided by the embodiment of the present invention further includes a water outlet collection part, and the water outlet collection part includes a joint and a drain pipe. The drain pipe is connected to the drain hole 5 through the joint. The drain pipe can be externally connected to a drainage bag, and the corresponding drainage volume test is measured through the water volume collected by the drainage bag.

[0042] To effectively improve the grouting efficiency and facilitate the connection between the grouting pipe 2 and the external grouting equipment, the grouting model test device provided by the embodiment of the present invention further includes a grouting hose. One end of the grouting hose is connected to the grouting pipe 2, and the other end of the grouting hose is externally connected to the grouting equipment.

[0043] Please refer further to Figure 3 here. In the technical solution provided by the embodiment of the present invention, the connecting frame 13 is a triangular connecting frame. The triangular connecting frame can have the advantages of high installation efficiency and low cost on the basis of ensuring a stable connection effect.

[0044] To facilitate the installation of the grouting device main body 1 and improve the installation efficiency, at the same time, taking into account ensuring the installation effect and installation consistency of the installation structure of the grouting device main body 1, in the technical solution provided by the embodiment of the present invention, the connecting frame 13, the bottom plate 11, and the side plate 12 are all preset with installation screw holes 6. The installation and fixation are carried out through the preset installation screw holes 6, which have the advantages of convenient installation and high installation consistency.

[0045] To further optimize the technical solution, to further improve the structural stability of the grouting device main body 1 and prevent the injected mortar from flowing out, in the grouting model test device provided by the embodiment of the present invention, an adhesive layer is provided at the connection between the bottom plate 11 and the side plate 12. The adhesive layer can effectively seal the installation gaps between the bottom plate 11 and the side plate 12 and between adjacent side plates 12, preventing the soil particles from flowing out of the installation gaps during the grouting process.

[0046] As can be seen from the above technical solutions, a grouting model test device provided by an embodiment of the present utility model has the following advantages:

[0047] 1. The technical solution provided by the embodiment of the present utility model can complete the grouting experiment of the large-scale soil model, can complete the single-hole grouting at the center of the main body of the grouting device, and study the grouting penetration radius and the distribution of grouting splitting veins of the single-hole grouting parameters; at the same time, by burying pressure collectors at appropriate positions, the variation law of the soil layer pressure during the grouting process can be studied; due to the large scale, this test device can also study the distribution of multi-hole grouting splitting veins and the grouting reinforcement effect; the large-scale model grouting experiment based on the indoor grouting test to optimize the grouting parameters can more realistically simulate the on-site grouting, and provide test data and technical support for engineering grouting.

[0048] 2. The technical solution provided by the embodiment of the present utility model can effectively promote the development of large-scale model tests. Especially when there are significant differences between the soil layers of the existing test site and the test soil layer, by digging a test pit in the soil layer of the existing test site and then installing this grouting test device in the test pit, the influence of the test site soil layer can be overcome. For example, if the soil layer at the test site is looser than the test soil sample, directly filling the test soil sample into the test pit for grouting, the slurry can directly open the channel and enter for simultaneous grouting, which is relatively safe. Especially during the splitting grouting test, the grouting pressure is relatively high. The surrounding of this device is a filled soil layer, which provides safety protection for grouting. In addition, this device is relatively simple to manufacture, with a low manufacturing cost, and at the same time provides an installation method for the inside of the grouting container, and the installation is relatively convenient.

[0049] 3. The technical solution provided by the embodiment of the present utility model uses the positioning pipe in cooperation with the ground penetrating radar for detection, can determine the parameters such as the dielectric constant of the soil before and after grouting measured by the ground penetrating radar, and at the same time analyze the radar images of the positioning pipe and the soil before and after grouting, accumulate the experience of radar image interpretation, and provide detection experience and basis for using the ground penetrating radar equipment to detect when inspecting the grouting effect at the grouting construction site, and expand the research ideas for the research of grouting reinforcement technology.

[0050] In summary, the present utility model provides a grouting model test device, including: a main body of the grouting device, a grouting pipe, and a data acquisition unit. The main body of the grouting device is a hollow cavity, and the grouting pipe and the data acquisition unit are arranged inside the main body of the grouting device. The main body of the grouting device includes: a bottom plate, side plates, and a connecting frame. The bottom plate and / or the side plates are provided with a plurality of drainage holes. The four sides of the bottom plate are respectively connected to the side plates, and the inner connecting surfaces of the adjacent bottom plate and / or the bottom plate and the side plates are connected by the connecting frame. In the technical solution provided by the present utility model, the connecting frame for connecting the bottom plate and the side plates of the main body of the grouting device is installed inside the connecting surface, and the installation can be completed inside the main body of the grouting device during installation, effectively reducing the volume of the pit required during installation and facilitating the installation. The grouting model test device provided by the present utility model solves the technical defect that in the prior art, there are great inconveniences in installing and placing the device for simulating in-situ grouting splitting and infiltration experiments in the soil.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. At the same time, other implementation manners can be derived from the above-described embodiments, so that structural and logical substitutions and changes can be made without departing from the scope of the present disclosure.

[0052] The above-described embodiments merely represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A grouting model test device, characterized in that: The grouting model test device comprises: a grouting device body, a grouting pipe and a data acquisition unit, wherein the grouting device body is a hollow cavity, and the grouting pipe and the data acquisition unit are arranged inside the grouting device body; The main body of the grouting device includes: a bottom plate, a side plate and a connecting frame. The bottom plate and / or the side plate are provided with a plurality of drainage holes. The four sides of the bottom plate are respectively connected to the side plates. The inner connecting surfaces of adjacent bottom plates and / or the bottom plate and side plates are connected through the connecting frame.

2. The grouting model test device according to claim 1, characterized in that: The grouting model test device further comprises: a tightening portion, which is sleeved on the outside of the side wall surface of the grouting device body.

3. The grouting model test device according to claim 1 or 2, characterized in that: The grouting model test device also includes: a filter screen, which is arranged at the drainage hole and is used to prevent solid matter in the grouting slurry from flowing out through the drainage hole.

4. The grouting model test device according to claim 1, characterized in that: The data collection unit comprises: a positioning tube and a pressure collector, wherein the positioning tube is arranged on the bottom plate, and the pressure collector is arranged inside the main body of the grouting device.

5. The grouting model test device according to claim 4, characterized in that: The number of the positioning tubes is greater than one.

6. The grouting model test device according to claim 3, characterized in that: The grouting model test device further comprises: a water collection part, the water collection part comprises: a joint and a drain pipe, and the drain pipe is connected to the drain hole through the joint.

7. The grouting model test device according to claim 1, characterized in that: The grouting model test device also includes: a grouting hose, one end of which is connected to the grouting pipe, and the other end of which is externally connected to a grouting device.

8. The grouting model test device according to claim 1, characterized in that: The connecting frame is a triangular connecting frame.

9. The grouting model test device according to claim 1 or 8, characterized in that: The connecting frame, the bottom plate and the side plates are all provided with preset mounting screw holes.

10. The grouting model test device according to claim 1, characterized in that: An adhesive layer is provided at the connection between the bottom plate and the side plate.

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