Splitting grouting slurry diffusion range experimental device

Abstract

The utility model discloses a splitting grouting slurry diffusion range experimental device, including counterforce frame, and the grouting diffusion mechanism is assembled and connected in counterforce frame, the grouting diffusion mechanism includes the first grouting clamping plate of fixed mounting in counterforce frame, and with the second grouting clamping plate of first grouting clamping plate cooperation, the face of first grouting clamping plate and second grouting clamping plate each other is coarse surface, when first grouting clamping plate and second grouting clamping plate merge, and the coarse surface between forms grouting gap, still include the push structure of driving second grouting clamping plate lift, still include the pump material structure for pumping test slurry, and the discharge end of pump material structure is located on second grouting clamping plate, and the discharge end is flush with the top surface of second grouting clamping plate and sets up. The above -mentioned structure realizes with the intuitive, safe, high accuracy way to carry out splitting grouting experimental test.

Description

Technical Field

[0001] This utility model belongs to the field of split grouting experimental technology, and in particular relates to an experimental device for the diffusion range of split grouting slurry. Background Technology

[0002] When a project involves low-permeability strata such as clay and silt, traditional grouting is difficult to penetrate. Fracture grouting uses high pressure to fracture the soil and form a network of fissures, which allows the grout to fill and solidify, significantly improving the soil strength. It is suitable for soft soil foundations, roadbed settlement, and other scenarios.

[0003] In projects with high groundwater levels or risks of seepage (such as dam foundations and tunnel engineering), fracturing grouting can form a continuous seepage barrier, blocking seepage paths while also providing reinforcement, thus solving both leakage and structural stability problems. Fracturing grouting technology is a core method for reinforcing low-permeability strata, controlling seepage, preventing geological disasters, and repairing structures. Its characteristics of "active fracturing and precise control" make it an irreplaceable solution in complex engineering projects.

[0004] In the research and development of split grouting technology, it is necessary to conduct simulation experiments on split grouting to determine the grouting effect.

[0005] However, existing experimental setups have the following problems: most experiments use smooth planar crack models, which cannot reflect the roughness and complexity of natural cracks; after the grout is injected, the grout cannot diffuse autonomously between the test plates, resulting in poor accuracy of the simulation experiment.

[0006] Secondly, during the test, the lack of a structurally stable reaction frame resulted in low stability and safety. Furthermore, the test involved using hydraulic cylinders and other equipment with high thrust, which meant that if the reaction frame (support) was not strong enough, the clamping plate could easily break if the reaction frame deformed significantly.

[0007] Meanwhile, observation methods are outdated: non-transparent experimental models rely on indirect measurements (such as pressure sensors to infer diffusion range), resulting in low data accuracy and an inability to observe grout flow details in real time. Therefore, there is an urgent need for an experimental device that can simulate in-situ stress and real fracture morphology, and support visual observation, in order to improve the scientific rigor and engineering applicability of grouting technology. Utility Model Content

[0008] Based on the above background, the purpose of this utility model is to provide an experimental device for the diffusion range of split grouting slurry.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A splitting grout diffusion range test device includes a reaction frame, and a grout diffusion mechanism is assembled and connected inside the reaction frame. The grout diffusion mechanism includes a first grout clamp fixedly installed on the reaction frame.

[0011] And a second grouting clamp that cooperates with the first grouting clamp. The surfaces of the first grouting clamp and the second grouting clamp facing each other are rough surfaces. When the first grouting clamp and the second grouting clamp are combined, a grouting gap is formed between the rough surfaces.

[0012] It also includes a push structure that drives the second grouting clamp to rise and fall;

[0013] It also includes a pumping structure for pumping test slurry, wherein the discharge end of the pumping structure is located on the second grouting clamp plate and is flush with the top surface of the second grouting clamp plate.

[0014] Preferably, the reaction frame includes side frame sections on both sides, and a crossbeam frame section is fixedly connected between the tops of the side frame sections;

[0015] The second grouting clamp slides between the side frame sections;

[0016] A base is fixedly connected between the bottoms of the side frames.

[0017] Preferably, the side frame section includes a pair of spaced-apart side frames, and a plurality of stiffening plates are welded between the side frames;

[0018] The crossbeam frame includes a pair of spaced-apart crossbeams, with several stiffening plates welded between them.

[0019] Preferably, the first grouting clamp and the second grouting clamp are made of transparent material. During the grouting test, the grout injected between the first grouting clamp and the second grouting clamp can diffuse through the transparent material.

[0020] Preferably, a plurality of upper connecting rods are fixedly installed on the top of the first grouting clamp, and the upper connecting rods are fixedly installed on the crossbeam frame.

[0021] Preferably, the actuating structure includes a pair of spaced-apart hydraulic cylinders;

[0022] The cylinder barrel of the hydraulic cylinder is fixedly installed on the top of the base, and a top seat is fixedly installed on the bottom of the second grouting clamp.

[0023] Preferably, the piston rod of the hydraulic cylinder is fixedly connected to an upper push seat, and a plurality of push rods are fixedly installed on the top of the upper push seat, with the push rods fixedly installed at the bottom of the top seat.

[0024] Preferably, the pump material structure includes a pump material short pipe fixedly installed on the second grouting clamp, wherein the discharge end of the pump material short pipe is flush with the top surface of the second grouting clamp;

[0025] The pump feed short pipe passes through the top seat;

[0026] The pump material structure also includes a pump material hose that connects to the short end of the pump material, and the pump material structure also includes a slurry tank;

[0027] A grouting pump is installed at the inlet end of the pump material hose, and the inlet end of the grouting pump is connected to the outlet end of the grout tank.

[0028] Preferably, the transverse cross-sectional shape of the first grouting clamp and the second grouting clamp is rectangular;

[0029] The first grouting clamp and the second grouting clamp have the same dimensions.

[0030] This utility model has the following beneficial effects:

[0031] 1. The reaction frame with reinforced structural design has high structural strength and can maintain the stability of the test during grouting. This is reflected in the fact that the steel structure reaction frame is not easily deformed, thus the test accuracy is higher.

[0032] 2. By creating rough surfaces on the opposing sidewalls of the first and second grouting clamps, the roughness facilitates the formation of gaps between them during the grouting test. This simulates the fracture structure within tunnel layers or soil / rock layers. Test grout under pressure is injected between the clamps, and the grout diffuses under their pressure. The diffusion of the grout can be observed through the transparent clamps, allowing for precise assessment of the diffusion process. This method provides a clearer and more intuitive way to simulate the fracturing grouting process.

[0033] 3. Since the second grouting clamp is driven by a hydraulic cylinder to press against the first grouting clamp, a top seat is designed at the bottom of the second grouting clamp to protect it, thereby further increasing the safety during the test.

[0034] 4. The second grouting clamp, due to its size matching the reaction frame, maintains contact between its two ends and the inner side of the sliding reaction frame during the upward process, thus greatly improving the safety of the test. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the reaction frame and grouting diffusion mechanism in the embodiments of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of the pump material short pipe installed on the second grouting clamp in an embodiment of this utility model;

[0038] Figure 3 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0039] Figure 4 This is a front view of an embodiment of the present invention.

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0044] Example 1

[0045] like Figure 1-4 As shown, an experimental device for the diffusion range of splitting grout includes a reaction frame 1, which is welded from a structurally reinforced steel support.

[0046] The specific structure includes: the reaction frame 1 includes side frame parts 12 arranged on the left and right sides, and a crossbeam frame part 13 is fixedly connected between the top of the side frame parts.

[0047] The specific structure of the side frame section 12 is as follows: the side frame section 12 includes a pair of side frames 121 spaced apart from left to right, and a plurality of stiffening plates, specifically horizontal stiffening plates 122, are welded between the side frames 121. Similarly, the crossbeam frame section 13 includes a pair of crossbeam frames 131 spaced apart from top to bottom, and a plurality of vertical stiffening plates, specifically vertical stiffening plates 132, are welded between the crossbeam frames 131.

[0048] The reaction frame 1 with the above-mentioned structural design has high structural strength and can maintain the stability of the test during the grouting test. This is reflected in the fact that the steel structure reaction frame 1 is not easily deformed, thus the test accuracy is higher.

[0049] The reaction frame 1 is equipped with a grouting diffusion mechanism 2. The grouting diffusion mechanism 2 includes a first grouting clamp 21 fixedly installed on the reaction frame 1; and a second grouting clamp 22 that cooperates with the first grouting clamp 21 (the transverse cross-sectional shape of the first grouting clamp 21 and the second grouting clamp 22 is rectangular; the dimensions of the first grouting clamp 21 and the second grouting clamp 22 are the same). The surfaces of the first grouting clamp 21 and the second grouting clamp 22 facing each other are rough surfaces. When the first grouting clamp 21 and the second grouting clamp 22 are combined, a grouting gap is formed between the rough surfaces.

[0050] Specifically, the first grouting clamp 21 and the second grouting clamp 22 are made of high-strength tempered glass (transparent material). (Due to their thickness, the first and second grouting clamps 21 and 22 have high structural strength, enabling them to successfully complete the compression test.) Rough surfaces are formed on the facing sidewalls of the first and second grouting clamps 21 and 22 through glass etching. This roughness causes a gap to form between the first and second grouting clamps 21 and 22 after they are compressed together during the grouting test. At this time, test grout under a certain pressure is injected between the first and second grouting clamps 21 and 22, and the grout diffuses under the compression of the clamps. The diffusion of the grout can be observed and studied through the transparent first and second grouting clamps 21 and 22, thus allowing for accurate judgment of the grout diffusion status. This method enables grouting test experiments to be conducted in a clearer and more intuitive way, simulating the splitting grouting process.

[0051] Since the first grouting clamp 21 and the second grouting clamp 22, which are made of transparent material, can be clearly penetrated, it is convenient to take pictures of the grout diffusion pattern after the experiment, thus facilitating the archiving of the experiment.

[0052] The second grouting clamp 22 is limited to sliding between the side frame portions 12 (that is, the size of the second grouting clamp 22 corresponds to the distance between the left and right side frame portions 12, and its left and right ends are slightly limited to abutting against the side walls of the side frame portions 12 facing each other).

[0053] A base 11 is fixedly connected between the bottoms of the aforementioned side frames.

[0054] The grouting diffusion mechanism 2 also includes a pushing structure that drives the second grouting clamp 22 to rise and fall; during the test, the pushing structure lifts the second grouting clamp 22 and presses it against the first grouting clamp 21.

[0055] The above-mentioned grouting diffusion mechanism 2 also includes a pumping structure for pumping test grout. The discharge end of the pumping structure is located on the second grouting clamp 22, and the discharge end is flush with the top surface of the second grouting clamp 22.

[0056] Example 2

[0057] like Figure 1-4As shown, in this embodiment, based on the structure of Embodiment 1, several upper connecting rods 211 are fixedly installed on the top of the first grouting clamp 21 (in the existing method, several connecting seats are fixedly installed on the top of the first grouting clamp 21, and the bottom of the upper connecting rods 211 is fixedly installed on the corresponding connecting seats. Because the contact surface between the connecting seats and the first grouting clamp 21 is increased, the pressure applied to the first grouting clamp 21 by the upper connecting rods is reduced, thereby protecting the first grouting clamp 21. Similarly, the second grouting clamp 22 described below is also protected by reducing pressure). The upper connecting rods 211 are fixedly installed on the crossbeam frame 13. The first grouting clamp 21 is fixedly installed in this way.

[0058] The aforementioned propulsion structure includes a pair of hydraulic cylinders 23 spaced apart on the left and right sides; wherein, the hydraulic cylinders 23 are the conventional hydraulic cylinders 23 disclosed in the prior art used in conventional splitting grouting tests, and the working principle is the same as that of the hydraulic cylinders 23 in the existing splitting grouting test. The hydraulic cylinders 23 synchronously drive the second grouting clamp 22 to rise and fall (the synchronous lifting and falling of the pair of hydraulic cylinders 23 is controlled by the conventional hydraulic oil circuit system of the hydraulic cylinders 23 disclosed in the prior art. Those skilled in the art can know the specific hydraulic circuit control system and working principle of the synchronous lifting and falling of the pair of hydraulic cylinders 23 disclosed in this utility model by consulting technical manuals and dictionaries).

[0059] During operation, when the hydraulic cylinder 23 synchronously pushes the second grouting clamp 22 until it is pressed and adhered to the first grouting clamp 21, a grouting test is performed.

[0060] According to the conventional fixing method of the existing hydraulic cylinder 23, the cylinder barrel of the hydraulic cylinder 23 is fixedly installed on the top of the base, and the bottom of the second grouting clamp 22 is fixedly installed with a top seat 221. The design of the top seat 221 is to protect the second grouting clamp 22, that is, to protect it by increasing the pressure between the top seat 221 and the second grouting clamp 22.

[0061] The piston rod of the hydraulic cylinder 23 is fixedly connected to an upper push seat 24. A pair of push rods 241 are fixedly installed on the top of the upper push seat 24, and the push rods 241 are fixedly installed at the bottom of the top seat.

[0062] During the process, the hydraulic cylinder 23 works, pushing the seat 24 to actuate the push rod, the top seat 22, and the second grouting clamp 22.

[0063] Example 3

[0064] like Figure 1-4As shown, based on the structure of Embodiment 1, the pump material structure includes a pump material short pipe 25 fixedly installed on the second grouting clamp 22. The discharge end of the pump material short pipe 25 is flush with the top surface of the second grouting clamp 22. The pump material short pipe 25 passes through the top seat 221. The pump material structure also includes a pump material hose 251 connected to the pump material short end (the pump material hose 251 is a pressure-resistant rubber hose disclosed in the prior art. During operation, the grouting pump pumps a test slurry such as concrete slurry at a certain pressure through the pump material hose 251, and the pump material hose 251 can withstand a certain hydraulic pressure). According to the existing testing method, the pump material structure also includes a slurry tank 27. A grouting pump 26 is installed at the inlet end of the pumping hose 251. The inlet end of the grouting pump 26 (which is the pump body conventionally used in existing split grouting tests) is connected to the outlet end of the grout tank 27 (similar to existing methods, the lower end of the grout tank 27 is connected to an outlet pipe, which is connected to the inlet end of the grouting pump 26). Similar to existing split grouting tests, during the test, the grouting pump 26 pumps the concrete grout from the grout tank. Its pumping structure and principle are the same as in existing split grouting tests.

[0065] During the test, the pump material hose 251, due to its certain degree of freedom, was able to follow and lift.

[0066] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An experimental device for the diffusion range of splitting grout, characterized in that, The system includes a reaction frame, and a grouting diffusion mechanism is assembled and connected inside the reaction frame. The grouting diffusion mechanism includes a first grouting clamp plate fixedly installed on the reaction frame. And a second grouting clamp that cooperates with the first grouting clamp. The surfaces of the first grouting clamp and the second grouting clamp facing each other are rough surfaces. When the first grouting clamp and the second grouting clamp are combined, a grouting gap is formed between the rough surfaces. It also includes a push structure that drives the second grouting clamp to rise and fall; It also includes a pumping structure for pumping test slurry, wherein the discharge end of the pumping structure is located on the second grouting clamp plate and is flush with the top surface of the second grouting clamp plate.

2. The experimental device for the diffusion range of splitting grouting slurry according to claim 1, characterized in that, The reaction frame includes side frame sections on both sides, and a crossbeam frame section is fixedly connected between the tops of the side frame sections; The second grouting clamp slides between the side frame sections; A base is fixedly connected between the bottoms of the side frames.

3. The experimental device for the diffusion range of splitting grouting slurry according to claim 2, characterized in that, The side frame section includes a pair of spaced-apart side frames, with several stiffening plates welded between the side frames; The crossbeam frame includes a pair of spaced-apart crossbeams, with several stiffening plates welded between them.

4. The experimental apparatus for the diffusion range of splitting grouting slurry according to claim 1, characterized in that, The first and second grouting clamps are made of transparent material. During the grouting test, the grout injected between the first and second grouting clamps can diffuse through the transparent material.

5. The experimental apparatus for the diffusion range of splitting grouting slurry according to claim 2, characterized in that, Several upper connecting rods are fixedly installed on the top of the first grouting clamp, and the upper connecting rods are fixedly installed on the crossbeam frame.

6. The experimental apparatus for the diffusion range of splitting grouting slurry according to claim 2, characterized in that, The actuating structure includes a pair of spaced-apart hydraulic cylinders; The cylinder barrel of the hydraulic cylinder is fixedly installed on the top of the base, and a top seat is fixedly installed on the bottom of the second grouting clamp.

7. The experimental apparatus for the diffusion range of splitting grouting slurry according to claim 6, characterized in that, The piston rod of the hydraulic cylinder is fixedly connected to an upper push seat, and a number of push rods are fixedly installed on the top of the upper push seat. The push rods are fixedly installed at the bottom of the top seat.

8. The experimental apparatus for the diffusion range of splitting grouting slurry according to claim 7, characterized in that, The pumping structure includes a pumping short pipe fixedly installed on the second grouting clamp, and the discharge end of the pumping short pipe is flush with the top surface of the second grouting clamp. The pump feed short pipe passes through the top seat; The pump material structure also includes a pump material hose that connects to the short end of the pump material, and the pump material structure also includes a slurry tank; A grouting pump is installed at the inlet end of the pump material hose, and the inlet end of the grouting pump is connected to the outlet end of the grout tank.

9. The experimental apparatus for the diffusion range of splitting grouting slurry according to claim 1, characterized in that, The first grouting clamp and the second grouting clamp have rectangular cross-sectional shapes. The first grouting clamp and the second grouting clamp have the same dimensions.

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