Underground water-sealed cave depot grouting device with drilling water outlet condition pre-detection function

Abstract

The utility model provides an underground water sealing cave depot grouting device with a drilling water outlet condition pre-detection function, and relates to the technical field of water sealing cave depot grouting, the underground water sealing cave depot grouting device comprises a water plugging structure, a communicating pipe and a measuring structure, the measuring structure is installed with the water plugging structure through the communicating pipe; the water plugging structure comprises a first pipe body and an air pressure type expansion plug wrapping the outer surface of the first pipe body, and a pressure release valve and a pressurization valve are arranged on the air pressure type expansion plug; wherein the pressure release valve is used for contraction of the air pressure type expansion plug, and the pressurization valve is used for expansion of the air pressure type expansion plug; the measuring structure comprises a third pipe body, an electronic pressure meter and an electronic flow meter, the device can solve the problems that in the prior art, water quantity measurement is not accurate, water pressure measurement is difficult and consumed time is long after drilling water outlet, it can be ensured that water quantity and water pressure data are accurately obtained within a short time after drilling water outlet, grouting parameter optimization is convenient to design, and the grouting efficiency is improved. And the grouting and water plugging effects are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water-sealed cavern grouting, in particular to an underground water-sealed cavern grouting device with a drilling water discharge condition pre-detection function. Background Art

[0002] Water discharge from boreholes is a common phenomenon during the construction period of underground water-sealed caverns. In order to further optimize design parameters such as grouting pressure and better achieve the expected grouting and water blocking effect, it is necessary to understand the water pressure and water flow of each borehole.

[0003] To address this situation, the current practice is to manually measure the water volume using instruments such as measuring cylinders, measuring cups, plastic sheets, and stopwatches, and to measure the outlet water pressure using an external pressure gauge.

[0004] However, it is not suitable for all drilling water conditions. When the drilling water output is small, groundwater often flows down along the hole wall, not in a stream, and the water output cannot be accurately measured at this time; when the drilling water output is large, groundwater gushes out of the borehole mouth in a jet-like shape. At this time, there is no suitable measuring instrument to accurately measure the water volume, which will also lead to a large deviation in the measured water output. In addition, a pressure gauge is added to achieve the purpose of measuring water pressure. The entire operation process is inefficient and the measurement accuracy is low, which is not conducive to the optimization of design parameters such as grouting pressure, and it is difficult to achieve a better expected grouting and water blocking effect. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, the utility model provides an underground water-sealed cavern grouting device with a pre-detection function of the drilling water discharge condition, which solves the problems of low measurement efficiency and low accuracy when measuring the drilling water discharge condition in the existing technology.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] In the utility model, the underground water-sealed cavern grouting device with the function of pre-detecting the water discharge condition of the drilling hole comprises a water blocking structure, a connecting pipe and a measuring structure, wherein the measuring structure is installed with the water blocking structure through the connecting pipe;

[0010] The water blocking structure includes a pipe body and a pneumatic expansion plug wrapped around the outer surface of the pipe body, and the pneumatic expansion plug is provided with a pressure relief valve and a pressure increasing valve;

[0011] Among them, the pressure relief valve is used for the contraction of the gas pressure expansion plug, and the pressure valve is used for the expansion of the gas pressure expansion plug;

[0012] The measuring structure includes a tube body three, an electronic pressure gauge and an electronic flow meter. The electronic pressure gauge and the electronic flow meter are sleeved on the outer surface of the tube body three and are detachably connected to the tube body three.

[0013] Furthermore, the outer surface of one end of the tube body 3 away from the connecting pipe is provided with a reverse thread, and the tube body 3 is installed with the drilling equipment through the reverse thread.

[0014] Furthermore, the pipe body 1 is threadably connected to the connecting pipe through threads arranged on the outer surface of the connecting pipe;

[0015] The pipe body 3 is threadably connected to the connecting pipe via threads arranged on the outer surface of the connecting pipe.

[0016] Furthermore, the connecting pipe is a three-way pipe, and the opening and closing of the corresponding port is controlled by a ball valve structure;

[0017] Two ports of the tee pipe are used for the installation of pipe body one and pipe body three, and the other port is the grouting port.

[0018] In another embodiment, the connecting pipe is a four-way pipe, and the four-way pipe includes a second pipe body, and the four ports of the second pipe body are the same, and a thread for installation is arranged on the outer surface of each port;

[0019] The four ports are respectively divided into one, two, three and four, and the one and two are symmetrical.

[0020] Branch pipe 1 is opened and closed by ball valve 1, branch pipe 2 is opened and closed by ball valve 2, branch pipe 3 is opened and closed by ball valve 3, and branch pipe 4 is opened and closed by ball valve 4;

[0021] The connecting pipe is installed with the water blocking structure through branch pipe 1, the connecting pipe is installed with the measuring structure through branch pipe 2, and grouting pipe 1 and grouting pipe 2 are installed on branch pipe 3 and branch pipe 4 respectively.

[0022] Furthermore, the slurries injected into the grouting pipe 1 and the grouting pipe 2 are different.

[0023] (3) Beneficial effects

[0024] The utility model provides an underground water-sealed cavern grouting device with a function of pre-detecting water discharge from a borehole. Compared with the existing technology, it has the following beneficial effects:

[0025] By setting up a water blocking structure, a connecting pipe and a measuring structure, using the connecting pipe to realize the installation of the water blocking structure and the measuring structure, and setting an electronic pressure gauge and an electronic flow meter on the measuring structure, the device can solve the problems of inaccurate water volume measurement after water comes out of the drilling hole, and difficult and time-consuming water pressure measurement in the existing technology. It can ensure that the water volume and water pressure data are accurately obtained within a short time after water comes out of the drilling hole, which is convenient for designing and optimizing grouting parameters;

[0026] In addition, the electronic pressure gauge and the electronic flow meter are combined with the water blocking structure used for grouting. The whole process is simple to install, which is conducive to shortening the waste of on-site construction time and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a structural diagram of a water blocking structure, a connecting pipe, and a measuring structure in an underground water-sealed cavern grouting device with a function of pre-detecting water discharge from a borehole;

[0029] Figure 2 This is a schematic diagram of the structure of an underground water-sealed cavern grouting device after assembly, which has the function of pre-detecting water discharge from a borehole.

[0030] Reference numerals:

[0031] 1. Water blocking structure; 10. Pipe body 1; 11. Pneumatic expansion plug; 111. Pressure relief valve; 112. Pressurization valve; 2. Connecting pipe; 20. Pipe body 2; 21. Branch pipe 1; 22. Branch pipe 2; 23. Branch pipe 3; 24. Branch pipe 4; 3. Measuring structure; 30. Pipe body 3; 31. Electronic pressure gauge; 32. Electronic flow meter. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] The embodiment of the present application solves the problems of low measurement efficiency and low accuracy when measuring the drilling water discharge condition in the prior art by providing an underground water-sealed cavern grouting device with a drilling water discharge condition pre-detection function, thereby improving the accuracy of the drilling water discharge condition measurement.

[0034] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0035] During the excavation of a certain underground water-sealed cavern, due to the site's abundant groundwater recharge source and the well-developed tensile water-conducting fractures in the rock mass, water leakage was common during the construction and excavation of anchor holes, advance water exploration holes on the tunnel face, pre-grouting holes on the tunnel face, and post-grouting holes on the tunnel wall. Water even gushed out of some boreholes in the form of jets, making accurate measurement of water pressure and flow very difficult. Furthermore, manually installing grouting hole plugs and anchor holes on site was difficult and time-consuming, resulting in significant groundwater loss and frequent sudden rises and falls in water levels in surrounding surface hydrological monitoring holes.

[0036] Based on the above situation, after consultation with various units, we researched and developed an integrated device that can realize automatic and accurate measurement of pressure and flow, subsequent grouting construction, and other functions, and is convenient to install and saves manpower. After 8 months of processing, improvement, testing and adjustment, the device was finally completed, which solved the problems of inaccurate measurement of water output and water pressure of underground water-sealed cavern boreholes, and the time-consuming manual installation of grouting hole plugs and anchor holes.

[0037] Through practice, such as Figure 1-Figure 2 As shown in the figure, by setting up a water blocking structure, a connecting pipe and a measuring structure, the connecting pipe is used to realize the installation of the water blocking structure and the measuring structure, and an electronic pressure gauge and an electronic flow meter are set on the measuring structure. The device can save 1 to 2 people, and the average installation process of the grouting orifice pipe can save 10 to 20 minutes per hole. When the inflation pressure of the pneumatic expansion plug reaches 1.5 MPa, most boreholes can be sealed. Only when the rock mass of a few orifices is relatively broken, there is a small amount of water seepage. At this time, the orifice is sealed by manually applying an anchor agent around the orifice to ensure the normal progress of subsequent grouting construction.

[0038] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0039] like Figure 1-Figure 2 As shown, an underground water-sealed cavern grouting device with a function of pre-detecting water discharge from a borehole comprises a water blocking structure 1, a connecting pipe 2, and a measuring structure 3. The measuring structure 3 is installed with the water blocking structure 1 through the connecting pipe 2.

[0040] The water blocking structure 1 includes a pipe body 10 and a pneumatic expansion plug 11 wrapped around the outer surface of the pipe body 10, and the pneumatic expansion plug 11 is provided with a pressure relief valve 111 and a pressurizing valve 112;

[0041] The pressure relief valve 111 is used for contraction of the gas pressure expansion plug 11, and the pressure increasing valve 112 is used for expansion of the gas pressure expansion plug 11;

[0042] The measuring structure 3 includes a tube body 30, an electronic pressure gauge 31 and an electronic flow meter 32. The electronic pressure gauge 31 and the electronic flow meter 32 are sleeved on the outer surface of the tube body 30 and are detachably connected to the tube body 30.

[0043] It should be noted that the pressurizing valve 112 and the pressure relief valve 111 are welded to the pneumatic expansion plug 11 to ensure good sealing and strength, and each component should have good precision and corrosion resistance to ensure that it can be reused;

[0044] A water blocking structure 1, a connecting pipe 2, and a measuring structure 3 are provided. The connecting pipe 2 is used to install the water blocking structure 1 and the measuring structure 3. An electronic pressure gauge 31 and an electronic flow meter 32 are provided on the measuring structure 3. The borehole is sealed using the pneumatic expansion plug 11 in the water blocking structure 1. After the borehole is filled with water, the electronic pressure gauge 31 and the electronic flow meter 32 respectively detect the water pressure and water flow.

[0045] This device can solve the problems in the existing technology of inaccurate water volume measurement after drilling water out, and difficult and time-consuming water pressure measurement. It can ensure that water volume and water pressure data are accurately obtained within a short time after drilling water out, which is convenient for designing and optimizing grouting parameters.

[0046] Furthermore, the electronic pressure gauge 31 and the electronic flow meter 32 are combined with the water blocking structure 1 used for grouting, and the entire process is simple to install, which is beneficial to shortening the waste of on-site construction time and improving construction efficiency.

[0047] like Figure 1-Figure 2 As shown, the outer surface of the end of the tube body 30 away from the connecting pipe 2 is provided with a reverse thread, and the tube body 30 is installed with the drilling equipment through the reverse thread.

[0048] By arranging a reverse thread on the outer surface of the tube body 30, the installation of the entire device and the drilling equipment is facilitated, and the drilling equipment is used to advance the entire device in the borehole, thereby solving the problem that the existing spiral mechanical plug installation method requires manual advancement, and when the water pressure out of the borehole is high, it is often difficult for manpower to push the mechanical plug into place.

[0049] like Figure 1-Figure 2 As shown, the pipe body 10 is threadedly connected to the connecting pipe 2 through the threads arranged on the outer surface of the connecting pipe 2;

[0050] The tube body 30 is threadably connected to the connecting pipe 2 via threads arranged on the outer surface of the connecting pipe 2 .

[0051] By providing the pipe body 10 and the pipe body 3 30 to be threadedly connected with the connecting pipe 2, the disassembly and installation of the entire device is facilitated, thereby improving the working efficiency of the entire device.

[0052] Specifically, the connecting pipe 2 is a three-way pipe, and the opening and closing of the corresponding ports are controlled by a ball valve structure. Two ports of the three-way pipe are used for the installation of the pipe body 10 and the pipe body 30, and the other port is a grouting port;

[0053] By setting the connecting pipe 2 as a tee pipe and using a one-way port to realize the grouting operation of the drilling, the grouting operation can be carried out without disassembling the measuring structure 3, further improving the efficiency of grouting and water blocking of the underground water-sealed cavern.

[0054] In another embodiment, Figure 2 As shown, the connecting pipe 2 is a four-way pipe, which includes a second pipe body 20. The four ports of the second pipe body 20 are the same, and a thread for installation is arranged on the outer surface of each port;

[0055] The four ports are respectively divided into a first port 21, a second port 22, a third port 23 and a fourth port 24, wherein the first port 21 and the second port 22 are symmetrical;

[0056] Branch pipe 1 21 is opened and closed by ball valve 1, branch pipe 2 22 is opened and closed by ball valve 2, branch pipe 3 23 is opened and closed by ball valve 3, and branch pipe 4 24 is opened and closed by ball valve 4;

[0057] The connecting pipe 2 is installed with the water blocking structure 1 through the branch pipe 1 21 , and the connecting pipe 2 is installed with the measuring structure 3 through the branch pipe 2 22 . Grouting pipe 1 and grouting pipe 2 are installed on the branch pipe 3 23 and the branch pipe 4 24 respectively.

[0058] Specifically, the cross-tube is a high-strength cast iron cross-tube;

[0059] By configuring the connecting pipe 2 as a four-way pipe, two branch pipes thereof are used for the installation of grouting pipes, and grouting is performed synchronously by using the two grouting pipes, thereby further improving the grouting efficiency.

[0060] Specifically, according to actual needs, the slurries injected into the grouting pipe 1 and the grouting pipe 2 are different.

[0061] By setting up grouting pipe one and grouting pipe two, different slurries are injected into the borehole simultaneously using grouting pipe one and grouting pipe two to achieve mixed grouting, thereby further improving the grouting and water blocking effect.

[0062] Moreover, the device can directly replace the grouting pipe for grouting construction without removing and burying the grouting pipe, which can shorten the time of on-site anchor hole and grouting pipe installation;

[0063] After the single-hole grouting is completed, the device can be reused after dismantling, cleaning and inspection, which greatly reduces material waste and realizes the concept of environmental protection, recycling and repetition.

[0064] It should be noted that the parameters and functions of the various components of the device are as follows:

[0065] (1) Pneumatic expansion plug 11: The outer diameter is consistent with the hole diameter (generally 60.0 mm, 89 mm, 110 mm), and the length varies from 0.5 to 1.5 m (determined by the degree of rock fragmentation of the cave wall and the amount of water output from the borehole). It can be pressurized and sealed by compressed air and can be quickly disassembled after the pressure is released by the pressure relief valve 111. The pressure bearing capacity should be no less than 3.0 MPa to ensure sealing;

[0066] (2) High-strength cast iron four-way pipe: the pipe diameter (outer diameter) is consistent with the hole diameter (generally 60.0mm, 89mm, 110mm);

[0067] (3) Electronic pressure gauge 31: A new intelligent digital display electronic pressure gauge is used to replace the existing pointer pressure gauge. It is powered by a built-in button battery, has an effective range of 0.05 to 5.0 MPa, an accuracy of 0.05 MPa, and has a function of automatically refreshing pressure data every second, which facilitates technicians to obtain pressure data in a timely and accurate manner;

[0068] (4) Electronic flow meter 32: Based on the basic principle of Faraday's law of electromagnetic induction, it is powered by a built-in lithium battery and does not require an external power supply. It has a digital display and automatically refreshes the flow data every second. The minimum accuracy can reach 0.05L / min, which makes it convenient for technicians to obtain flow data in a timely and accurate manner.

[0069] During operation, first install the connecting pipe 2 on the water blocking structure 1 and connect it with the pipe body 10 through a thread. Then, install the measuring structure 3 on the connecting pipe 2 at a position opposite to the water blocking structure 1. After that, install the water blocking structure 1 and the measuring structure 3. Then, install the grouting pipe on the corresponding port of the connecting pipe 2 and connect it with the connecting pipe 2 through a thread. Then, install the whole after installation on the drilling equipment used on site through the reverse thread on the pipe body 30.

[0070] After the installation of the entire device is completed, in the initial state, the pressure of the pneumatic expansion plug 11 is released through the pressure relief valve 111, and the pneumatic expansion plug 11 is in a contracted state. The water blocking structure 1 is pushed into the corresponding borehole using the drilling equipment until the pneumatic expansion plug 11 is partially located in the borehole. After that, the pneumatic expansion plug 11 is pressurized through the pressurizing valve 112, so that the pneumatic expansion plug 11 is in an expanded state. The outer wall of the pneumatic expansion plug 11 in the expanded state abuts against the hole wall, sealing the borehole opening and achieving the effect of sealing the borehole.

[0071] It should be noted that after the drilling hole is sealed, it is necessary to check whether there is water seepage at the hole; if there is water seepage, the hole is further sealed by manually applying anchoring agent; if there is no water seepage, proceed to the next step;

[0072] After the drilling hole is blocked, close ball valves 2, 3, and 4, close and open ball valve 1, and wait until the hole is full of water. Then open ball valve 2, read and record the water pressure and water volume data.

[0073] Finally, remove the measuring structure 3 and choose to release the accumulated water. After that, close ball valve 2 and open ball valves 3 and 4. Based on the test data, optimize the design parameters such as grouting pressure, select the appropriate grouting pressure for the slurry and inject it into the corresponding grouting pipe. Then, it flows through branch pipe 21, through pipe body 10, and into the pores to complete the grouting.

[0074] In summary, compared with the existing technology, the present invention has the following beneficial effects:

[0075] 1. By providing a water blocking structure 1, a connecting pipe 2, and a measuring structure 3, the connecting pipe 2 is used to realize the installation of the water blocking structure 1 and the measuring structure 3, and an electronic pressure gauge 31 and an electronic flow meter 32 are provided on the measuring structure 3. This device can solve the problems in the prior art of inaccurate water volume measurement after water comes out of the borehole, and difficult and time-consuming water pressure measurement. It can ensure that water volume and water pressure data are accurately obtained within a short time after water comes out of the borehole, which is convenient for designing and optimizing grouting parameters.

[0076] Furthermore, the electronic pressure gauge 31 and the electronic flow meter 32 are combined with the water blocking structure 1 used for grouting, and the entire process is simple to install, which is beneficial to shortening the waste of on-site construction time and improving construction efficiency.

[0077] 2. By arranging a reverse thread on the outer surface of the tube body 30, the installation of the entire device and the drilling equipment is facilitated, and the drilling equipment is used to advance the entire device in the borehole, thereby solving the problem that the existing spiral mechanical plug installation method requires manual advancement. When the water pressure of the borehole is high, it is often difficult for manpower to push the mechanical plug into place.

[0078] 3. By setting the connecting pipe 2 in the form of a four-way pipe, the two branch pipes are used for the installation of grouting pipes, and the two grouting pipes are used for synchronous grouting, thereby further improving the grouting efficiency.

[0079] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An underground water-sealed cavern grouting device with a function of pre-detecting water discharge from a borehole, characterized in that: It comprises a water blocking structure (1), a connecting pipe (2) and a measuring structure (3), wherein the measuring structure (3) is installed with the water blocking structure (1) via the connecting pipe (2); The water blocking structure (1) comprises a pipe body (10) and a pneumatic expansion plug (11) wrapped around the outer surface of the pipe body (10), wherein the pneumatic expansion plug (11) is provided with a pressure relief valve (111) and a pressurizing valve (112); The pressure relief valve (111) is used for contraction of the gas pressure expansion plug (11), and the pressure increasing valve (112) is used for expansion of the gas pressure expansion plug (11); The measuring structure (3) comprises a tube body (30), an electronic pressure gauge (31) and an electronic flow meter (32). The electronic pressure gauge (31) and the electronic flow meter (32) are sleeved on the outer surface of the tube body (30) and are detachably connected to the tube body (30).

2. The underground water-sealed cavern grouting device with a drilling water condition pre-detection function according to claim 1, characterized in that: The outer surface of one end of the pipe body three (30) away from the connecting pipe (2) is provided with a reverse thread, and the pipe body three (30) is installed with the drilling equipment through the reverse thread.

3. The underground water-sealed cavern grouting device with a drilling water discharge pre-detection function according to claim 2, characterized in that: The pipe body 1 (10) is threadably connected to the connecting pipe (2) via threads arranged on the outer surface of the connecting pipe (2); The pipe body three (30) is threadedly connected to the connecting pipe (2) via threads arranged on the outer surface of the connecting pipe (2).

4. The underground water-sealed cavern grouting device with a drilling water condition pre-detection function according to claim 3, characterized in that: The connecting pipe (2) is a three-way pipe, and the opening and closing of the corresponding port is controlled by a ball valve structure; Two ports of the tee pipe are used for installing pipe body one (10) and pipe body three (30), and the other port is a grouting port.

5. The underground water-sealed cavern grouting device with a drilling water condition pre-detection function according to claim 3, characterized in that: The connecting pipe (2) is a four-way pipe, and the four-way pipe includes a second pipe body (20). The four ports of the second pipe body (20) are all the same, and a thread for installation is arranged on the outer surface of each port; The four ports are respectively branch one (21), branch two (22), branch three (23) and branch four (24), and the branch one (21) and the branch two (22) are symmetrical; Branch pipe 1 (21) is opened and closed by ball valve 1, branch pipe 2 (22) is opened and closed by ball valve 2, branch pipe 3 (23) is opened and closed by ball valve 3, and branch pipe 4 (24) is opened and closed by ball valve 4; The connecting pipe (2) is installed with the water blocking structure (1) through the branch pipe 1 (21), the connecting pipe (2) is installed with the measuring structure (3) through the branch pipe 2 (22), and the branch pipe 3 (23) and the branch pipe 4 (24) are respectively installed with the grouting pipe 1 and the grouting pipe 2.

6. The underground water-sealed cavern grouting device with a drilling water condition pre-detection function according to claim 5, characterized in that: The slurries injected into the grouting pipe 1 and the grouting pipe 2 are different.

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