A test device for grouting reinforcement of tunnel surrounding rock

Abstract

This utility model provides a tunnel surrounding rock grouting reinforcement test device, belonging to the technical field of grouting reinforcement test devices. It includes a flexible membrane and two semi-cylindrical shells. The two semi-cylindrical shells, when fastened together, form a cylindrical space with a closed bottom but an open top. The flexible membrane can wrap around the two semi-cylindrical shells in the fastened state and seal the fastening point. This utility model utilizes a flexible membrane to wrap around the two semi-cylindrical shells in the fastened state, to tighten the two semi-cylindrical shells, and to seal the gap at the fastening point, thereby improving the sealing performance. After grouting is completed and the grout in the cylindrical space solidifies, the flexible membrane can be unwound to loosen the two semi-cylindrical shells. Then, the two semi-cylindrical shells and the solidified cylindrical body inside can be separated manually or with tools. The test device provided by this utility model has good sealing performance, is easy to dismantle, and has low cost.

Description

Technical Field

[0001] This utility model relates to the technical field of grouting reinforcement test device, and in particular to a grouting reinforcement test device for tunnel surrounding rock. Background Technology

[0002] Grouting reinforcement of tunnel surrounding rock is a key technology for improving the mechanical properties of weak and fractured rock masses. Its effectiveness depends on the grout diffusion law, the response of the surrounding rock, and the matching of grouting parameters. Currently, experimental research on grouting reinforcement at home and abroad is mainly carried out through simulation tests inside the tunnel boring machine. In existing technologies, model boxes are used for testing. The model boxes are usually made of wood. Split wooden boxes have poor sealing performance, while integrated wooden boxes have good sealing performance but are not easy to dismantle, requiring damage to the box to remove the model box. Therefore, there is an urgent need for a device with good sealing performance and easy dismantling to solve the above-mentioned defects. Utility Model Content

[0003] The purpose of this invention is to provide a tunnel surrounding rock grouting reinforcement test device to solve the problems existing in the prior art, which has good sealing performance and is easy to dismantle.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a tunnel surrounding rock grouting reinforcement test device, including: a flexible membrane and two semi-barrel-shaped shells; the two semi-barrel-shaped shells are fastened together to form a cylindrical space with a closed bottom but an open top, and the flexible membrane can wrap around the two semi-barrel-shaped shells in the fastened state and seal the fastening point of the two semi-barrel-shaped shells.

[0006] In some embodiments, the flexible membrane is a disposable flexible membrane.

[0007] In some embodiments, the cross-section of the semi-barrel-shaped shell is semi-circular.

[0008] In some embodiments, the two semi-barrel-shaped shells are formed by dividing a lidless but bottomless barrel in two along a plane passing through its own axis.

[0009] In some embodiments, the semi-barrel-shaped shell is made of metal.

[0010] In some embodiments, the system further includes a grouting pipe having a grouting port through which grout is injected into the cylindrical space.

[0011] In some embodiments, a filter cloth is also included, which covers the grouting port to reduce the pressure of the grout injected from the grouting port.

[0012] In some embodiments, the filter cloth is a geotextile.

[0013] In some embodiments, the lidless but bottom-covered bucket is a discarded bucket left unused during tunnel construction.

[0014] In some embodiments, the flexible membrane is a transparent membrane.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The tunnel surrounding rock grouting reinforcement test device provided by this utility model includes a flexible membrane and two semi-cylindrical shells. The two semi-cylindrical shells, when fastened together, form a cylindrical space with a closed bottom but an open top. The flexible membrane can wrap around the two semi-cylindrical shells in the fastened state and seal the fastening point. This utility model utilizes a flexible membrane to wrap around the two semi-cylindrical shells in the fastened state, to tighten the two semi-cylindrical shells, and to seal the gap at the fastening point, thereby improving the sealing performance. After grouting is completed and the grout in the cylindrical space solidifies, the flexible membrane can be unwound to loosen the two semi-cylindrical shells. Then, the two semi-cylindrical shells and the solidified cylindrical body inside can be separated manually or with tools. Therefore, the tunnel surrounding rock grouting reinforcement test device provided by this utility model has good sealing performance, and the outer shell of the solidified cylindrical body is easy to remove after the test. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the tunnel surrounding rock grouting reinforcement test device provided by this utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the semi-barrel-shaped shell;

[0020] In the diagram: 1 - flexible membrane; 2 - semi-barrel-shaped shell. Detailed Implementation

[0021] 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.

[0022] The purpose of this invention is to provide a tunnel surrounding rock grouting reinforcement test device to solve the problems existing in the prior art, which has good sealing performance and is easy to dismantle.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] First, some technical terms involved in the embodiments of this application will be introduced.

[0025] Tightening: Emphasizing that the flexible membrane applies circumferential force like a strap to tightly bind the two semi-barrel-shaped shells together and prevent loosening.

[0026] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0027] This utility model provides a tunnel surrounding rock grouting reinforcement test device, including: a flexible membrane 1 and two semi-barrel-shaped shells 2; the two semi-barrel-shaped shells 2 are fastened together to form a cylindrical space with a closed bottom but an open top, and the flexible membrane 1 can wrap around the two semi-barrel-shaped shells 2 in the fastened state and seal the fastening point of the two semi-barrel-shaped shells 2.

[0028] During use, before grouting, fasten the two semi-barrel-shaped shells 2 together, and then wrap at least one layer of flexible membrane 1 around the two semi-barrel-shaped shells 2. Of course, you can wrap it several times to make the two semi-barrel-shaped shells 2 more stable. Then, grout into the two semi-barrel-shaped shells 2. After grouting, let it stand for a certain period of time according to the test conditions, and then tear off the flexible membrane 1. Then, manually or with tools, separate the two semi-barrel-shaped shells 2 from the solidified column inside.

[0029] This invention utilizes a flexible membrane 1 to wrap two semi-cylindrical shells 2 that are in a snap-fit ​​state. The flexible membrane 1 is used to tighten the two semi-cylindrical shells 2 and seal the gap at the snap-fit ​​point of the two semi-cylindrical shells 2, thereby improving the sealing performance. After grouting is completed and the grout in the cylindrical space has solidified, the flexible membrane 1 is unwound to loosen the two semi-cylindrical shells 2. Then, the two semi-cylindrical shells 2 can be separated from the solidified cylindrical body inside by hand or with tools. Therefore, the tunnel surrounding rock grouting reinforcement test device provided by this invention has good sealing performance, and the shell outside the solidified cylindrical body is easy to remove after the test.

[0030] Understandably, the test apparatus needs to be airtight to prevent grout leakage during grouting, and it needs to be easily removable to facilitate subsequent demolding and improve test efficiency.

[0031] In some embodiments, the flexible film 1 is a disposable flexible film. Its thickness is similar to that of household cling film, with a thickness between 0.03 and 0.2 mm. When using it, it can be wrapped several times, and the flexible film 1 needs to be stretched taut during wrapping so that the flexible film 1 itself has a certain tensile force after wrapping, thereby improving the sealing effect and the tightening effect, and increasing the success rate of the test.

[0032] In some embodiments, the cross-section of the semi-barrel-shaped shell 2 is semi-circular.

[0033] This embodiment makes the overall structure without edges after fastening, which is beneficial for using the flexible membrane 1 to bind the two semi-barrel-shaped shells 2 together.

[0034] In some embodiments, the two semi-barrel-shaped shells 2 are formed by dividing a lidless but bottomless barrel in two along a plane passing through its own axis.

[0035] In some embodiments, the flexible membrane 1 is made of plastic.

[0036] In some embodiments, the semi-barrel-shaped shell 2 is made of metal, such as an iron barrel or a stainless steel barrel.

[0037] The semi-barrel-shaped shell 2 provided in this embodiment is made of metal, which is low in cost. The inner and outer walls of the metal shell are smooth, which is beneficial for subsequent sealing with the flexible membrane 1 and demolding. It is understandable that if the semi-barrel-shaped shell 2 were made of wood, the cost of the wooden barrel would be high, and after the shell is fastened, it would be difficult to seal the gaps in the wooden material with the flexible membrane 1.

[0038] Furthermore, when the flexible membrane 1 is wrapped around the metal semi-barrel shell 2, the first layer of flexible membrane 1 can adhere to the surface of the metal shell, thereby improving the stability of the semi-barrel shell 2 after tightening.

[0039] In some embodiments, the present invention further includes a grouting pipe having a grouting port, through which grout is injected into the cylindrical space.

[0040] This embodiment achieves the purpose of injecting grout into the cylindrical space between the two semi-barrel-shaped shells 2 after they are fastened together.

[0041] In some embodiments, the present invention further includes a filter cloth covering the grouting port to reduce the pressure of the grout injected from the grouting port.

[0042] This embodiment can reduce the pressure of the grout injected from the injection port, thereby preventing grout splashing caused by excessive grout pressure and avoiding the injected grout from creating a pit on the surface of the already injected grout.

[0043] In practical applications, the grouting port is also covered with filter cloth. Understandably, another reason for setting the filter cloth in this utility model is to simulate actual working conditions and thus improve the accuracy of the test.

[0044] In some embodiments, the filter cloth is a geotextile.

[0045] In some embodiments, the bucket without a lid but with a bottom is a discarded bucket that was not used during tunnel construction.

[0046] This embodiment reduces costs.

[0047] In some embodiments, the flexible membrane 1 is a transparent membrane.

[0048] This embodiment facilitates staff observation of grout leakage, enabling them to develop appropriate response strategies.

[0049] In some embodiments, the flexible film 1 is arranged in a roll, such as... Figure 1 As shown, this makes it easy for staff to wrap the flexible membrane 1 around the two interlocking semi-cylindrical shells 2, and also makes it easy to store.

[0050] In some embodiments, a reusable flexible membrane may also be used to wrap around the two semi-barrel-shaped shells 2, thereby further reducing the testing cost.

[0051] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0053] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this utility model to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0054] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0055] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0056] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0057] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0058] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A test device for grouting reinforcement of tunnel surrounding rock, characterized in that: include: A flexible membrane (1) and two semi-barrel-shaped shells (2); the two semi-barrel-shaped shells (2) are fastened together to form a cylindrical space with a closed bottom but an open top. The flexible membrane (1) can wrap around the two semi-barrel-shaped shells (2) in the fastened state and seal the fastening point of the two semi-barrel-shaped shells (2).

2. The tunnel surrounding rock grouting reinforcement test device according to claim 1, characterized in that: The flexible membrane (1) is a disposable flexible membrane.

3. The tunnel surrounding rock grouting reinforcement test device according to claim 1, characterized in that: The cross-section of the semi-barrel-shaped shell (2) is semi-circular.

4. The tunnel surrounding rock grouting reinforcement test device according to claim 1, characterized in that: The two semi-barrel-shaped shells (2) are formed by dividing a lidless but bottomless barrel in two along a plane passing through its own axis.

5. The tunnel surrounding rock grouting reinforcement test device according to claim 1, characterized in that: The semi-barrel-shaped shell (2) is made of metal.

6. The tunnel surrounding rock grouting reinforcement test device according to claim 1, characterized in that: It also includes a grouting pipe having a grouting port, through which the grouting pipe injects grout into the cylindrical space.

7. The tunnel surrounding rock grouting reinforcement test device according to claim 6, characterized in that: It also includes a filter cloth that covers the grouting port to reduce the pressure of the grout injected from the grouting port.

8. The tunnel surrounding rock grouting reinforcement test device according to claim 7, characterized in that: The filter cloth is a geotextile.

9. The tunnel surrounding rock grouting reinforcement test device according to claim 4, characterized in that: The buckets without lids but with bottoms are discarded buckets left unused during tunnel construction.

10. The tunnel surrounding rock grouting reinforcement test device according to claim 1, characterized in that: The flexible membrane (1) is a transparent membrane.

Images