Accurate metering system and method for hidden project grouting work amount based on Internet of Things

Abstract

The invention relates to the technical field of grouting engineering, in particular to a hidden engineering grouting engineering quantity metering system and method based on the Internet of Things, the system is composed of a flow measuring device, an Internet of Things transmission module and an intelligent construction site platform, and data collected by the flow measuring device is uploaded to the intelligent construction site platform through the Internet of Things transmission module; the Coriolis flowmeter tool is matched with other fixing structures, a flow measuring device and a grouting opening can be fixed, meanwhile, the Internet of Things and an intelligent construction site platform are fused, a grouting amount dynamic calculation model is constructed, real-time data verification and error correction are supported, video monitoring and data warning functions are integrated in a hidden engineering special module, and the construction efficiency is improved. And full-life-cycle management and control of the grouting process are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting engineering, and in particular to a concealed engineering grouting quantity measurement system and method based on the Internet of Things. Background Art

[0002] Hidden works refer to buildings, structures, and other structures where construction materials or components are buried within an object and then covered, rendering them invisible. Examples include tunnel grouting and foundation reinforcement. Because grouting operations occur in invisible areas such as underground rock and structural cracks, conventional monitoring methods cannot directly observe the grout diffusion path and saturation state. To review the engineering quantities of hidden works in power transmission and transformation projects, accurate measurement of these quantities is necessary during construction. Engineering quantities represent the material and labor consumption of a project and should be expressed in physical or geometric units that are easily measurable and calculable. Measuring, calculating, and determining numerical quantities is the task of engineering measurement. During trench grouting construction, uncertainties in engineering geology and hydrogeology make it difficult to accurately determine the slurry diffusion radius. Grouting quantities calculated based on parameters such as stratum porosity provided in geological survey reports are inaccurate, leading to measurement disputes during project settlement. Determining grouting quantities through controlling the delivery of grouting materials, monitoring the grouting process, and inspecting actual grouting results carries the risk of inaccurate supporting data.

[0003] Traditional grouting projects mostly use footage measurement method, injection volume measurement method or manual supervision and on-site record keeping, which are prone to problems such as large manual errors and insufficient data support, which can easily lead to settlement disputes. In addition, most existing flow meters are fixedly installed and connected by flanges, which require multiple bolts and are inconvenient to disassemble and assemble, and cannot adapt to diversified construction equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a concealed engineering grouting quantity measurement system and method based on the Internet of Things to solve the problems in the background technology that the flow meter is inconvenient to disassemble and assemble, and the grouting quantity is difficult to measure.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a concealed engineering grouting quantity metering system based on the Internet of Things, which is characterized in that it consists of a flow measuring device, an Internet of Things transmission module and a smart construction site platform. The data collected by the flow measuring device is uploaded to the smart construction site platform through the Internet of Things transmission module.

[0006] Preferably, the flow measuring device includes a Coriolis flowmeter, a flange body, and a circular plate, wherein the flange body and the Coriolis flowmeter are fixedly connected, the circular plate is elastically connected to the flange body via an elastic member, the Coriolis flowmeter and the circular plate are slidably connected, an electromagnet is fixedly provided on the flange body, and the circular plate is made of magnetic material; A push-pull structure is provided on the circular plate, a first end of the push-pull structure is fixedly connected to the circular plate, a second end of the push-pull structure passes through the flange body, and a positioning block for locking the docking flange is provided on the push-pull structure.

[0007] Preferably, the push-pull structure includes a sleeve and a push-pull rod, the first end of the push-pull rod is bolted to the circular plate, the second end of the push-pull rod extends to the inside of the first end of the sleeve and is bolted to a piston, and the piston is slidingly connected to the inner wall of the sleeve, the second end of the sleeve is sealed, a through hole is opened on the sleeve, a positioning block is slidingly connected to the through hole, and a seal is provided between the positioning block and the through hole.

[0008] Preferably, clamping blocks are provided at both ends of the positioning block.

[0009] Preferably, the thickness of one end of the seal away from the sleeve is smaller than the thickness of the other end thereof, forming a groove for embedding the card block.

[0010] Preferably, a limit block is fixedly provided on the outside of the sleeve, and the limit block is located between the flange body and the circular plate.

[0011] Preferably, the elastic member includes a compression spring and a sliding rod, and a plurality of sliding holes are also opened through the surface of the circular plate. The inner wall of the sliding hole is slidably connected with the sliding rod, the first end of the sliding rod is welded to the flange body, and the second end of the sliding rod is bolted to the limiting plate. The compression spring is sleeved on the surface of the sliding rod, and the compression spring is located between the circular plate and the flange body.

[0012] A second aspect of the present invention provides a method for installing a flow measuring device, comprising: Align the sleeve of the flange body with the mounting hole of the grouting port flange; Start the electromagnet to attract the circular plate to move, and push the piston through the push-pull rod to squeeze the hydraulic oil in the sleeve, so that the sleeve is inserted into the hole of the docking flange; When the limit block contacts the flange body, continue to squeeze the hydraulic oil to make the positioning block extend from the seal, and the positioning block is stuck on the edge of the hole of the mating flange to complete the mechanical locking; When disassembling, the electromagnet is turned off, the compression spring pushes the circular plate to reset, and the piston is driven to withdraw the hydraulic oil to retract the positioning block, and the sleeve automatically withdraws from the docking flange hole.

[0013] The third aspect of the present invention is a method for measuring the quantity of grouting work in a concealed project based on the Internet of Things, which uses the aforementioned system for measuring the quantity of grouting work in a concealed project based on the Internet of Things, and the method comprises the following steps: Obtain slurry data in real time through flow measurement device; Obtain geological parameters; Get project parameters; Upload slurry data, geological parameters and engineering parameters to the smart construction site platform via the IoT transmission module; The smart construction site platform calculates the grouting quantity based on slurry data and geological parameters through an embedded dynamic measurement model; Correct the real-time grouting volume based on the grouting engineering volume.

[0014] Preferably, the steps of constructing the dynamic measurement model are: Obtain the slurry diffusion radius and construct the grouting volume calculation formula: ; Where: Q is the grouting volume of the small tube, H is the angle of the small tube layout range of the arch relative to the center of the circle, R is the radius of the small tube position relative to the center of the circle, t is the slurry diffusion radius, L is the effective length of the small tube, and G is the porosity of the rock mass; The total grouting volume is obtained by summing up the grouting volumes of a single row or multiple rows of small tubes on the same section.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention combines the Corio flowmeter fixture with other fixed structures, so that the flow measurement device and the grouting port can be fixed. At the same time, it integrates the Internet of Things and the smart construction site platform to build a dynamic calculation model for grouting volume, supports real-time data verification and error correction, and integrates video monitoring and data alarm functions in the dedicated module for concealed projects to achieve full life cycle management and control of the grouting process.

[0016] The present invention drives the circular plate to move by turning on the electromagnet, and drives the push-pull rod and the piston to move, squeezes the hydraulic oil inside the sleeve, and pushes the sleeve to move. When the sleeve passes through the flange connected to the grouting port, the sleeve stops moving under the action of the limit block, and the piston continues to squeeze the internal hydraulic oil to extend the positioning block, thereby fixing the flow measuring device and the grouting port to each other. During the disassembly process, it is only necessary to turn off the electromagnet, let the compression spring push the circular plate to reset, and let the positioning block retract into the seal, and the sleeve withdraws from the hole on the surface of the grouting port flange, thereby releasing the fixation. There is no need to use bolts for fixing, and disassembly and assembly are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the flow measurement device of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the sleeve in the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle; Figure 4 It is a structural diagram of the positioning block in the present invention; Figure 5 It is a side view of the flange body of the present invention; Figure 6 It is a side view of the circular plate in the present invention.

[0018] In the figure: 101, Corio flowmeter; 102, flange body; 103, circular plate; 104, sliding hole; 105, sliding rod; 106, compression spring; 107, limit plate; 108, push-pull rod; 109, electromagnet; 110, piston; 111, sleeve; 112, positioning block; 113, seal; 114, limit block. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 creative efforts are within the scope of protection of the present invention.

[0020] Example 1 See also Figures 1-6 As shown in Figure 1, a concealed engineering grouting quantity measurement system based on the Internet of Things is composed of a flow measurement device, an Internet of Things transmission module, and a smart construction site platform. The Internet of Things transmission module is an integrated GPRS wireless terminal (such as the Data-GHR-101 model), which transmits flow, density, temperature and other data to the cloud server in real time. The smart construction site platform realizes data visualization, remote alarm and quality traceability functions by adding a concealed engineering module. The concealed engineering module consists of an application layer, a service layer, a presentation layer, a support layer, and an infrastructure layer (see Table 1 for details).

[0021] Table 1. Composition of concealed engineering modules

[0022] The flow measurement device includes a Coriole flowmeter 101, a flange body 102, and a circular plate 103. The flange body 102 and the Coriole flowmeter 101 are fixedly connected, and the circular plate 103 is elastically connected to the flange body 102 via an elastic member. The Coriole flowmeter 101 includes a measuring tube and a meter. The measuring tube of the Coriole flowmeter 101 is slidably connected to the circular plate 103. An electromagnet 109 is fixedly mounted on the flange body 102, and the circular plate 103 is made of magnetic material. The circular plate 103 is provided with a push-pull structure, a first end of which is fixedly connected to the circular plate 103 , a second end of which passes through the flange body 102 , and a positioning block 112 for locking the docking flange is provided on the push-pull structure.

[0023] As a preferred example of the above embodiment, the push-pull structure includes a sleeve 111 and a push-pull rod 108. The first end of the push-pull rod 108 is bolted to the circular plate 103. The second end of the push-pull rod 108 extends to the inside of the first end of the sleeve 111 and is bolted to a piston 110. The piston 110 is slidingly connected to the inner wall of the sleeve 111. The second end of the sleeve 111 is sealed. The sleeve 111 is slidingly connected to the original bolt hole of the flange body 102. A through hole is opened on the sleeve 111. A positioning block 112 is slidingly connected to the through hole. A seal 113 is arranged between the positioning block 112 and the through hole. The seal 113 is fixedly connected to the inner wall of the through hole. Hydraulic oil is arranged in the sleeve 111.

[0024] As a preferred example of the above embodiment, both ends of the positioning block 112 are provided with a clamping block, the size of the clamping block close to the central axis of the sleeve 111 is larger than the diameter of the through hole, and the size of the clamping block away from the central axis of the sleeve 111 is smaller than the diameter of the through hole.

[0025] As a preferred example of the above embodiment, the thickness of the seal 113 at one end away from the central axis of the sleeve 111 is smaller than the thickness at the other end, forming a groove for embedding the card block, so that when the sleeve 111 is not extended, the positioning block 112 can be completely received in the through hole, avoiding the protrusion of the positioning block 112 affecting the sleeve 111 from passing through the docking flange.

[0026] As a preferred example of the above embodiment, the cross section of the positioning block 112 is an I-shape.

[0027] As a preferred example of the above embodiment, a limiting block 114 is fixedly provided on the outside of the sleeve 111 , and the limiting block 114 is located between the flange body 102 and the circular plate 103 .

[0028] As a preferred example of the above embodiment, the elastic member includes a compression spring 106 and a sliding rod 105. A plurality of sliding holes 104 are also opened through the surface of the circular plate 103. The inner wall of the sliding hole 104 is slidably connected to the sliding rod 105. The first end of the sliding rod 105 is welded to the flange body 102, and the second end of the sliding rod 105 is bolted to the limiting plate 107. The compression spring 106 is sleeved on the surface of the sliding rod 105. The compression spring 106 is located between the circular plate 103 and the flange body 102. During the movement of the circular plate 103, it can slide along the surface of the sliding rod 105 through the sliding hole 104, thereby increasing the sliding stability of the circular plate 103. At the same time, under the action of the limiting plate 107, the compression spring 106 can be prevented from popping the circular plate 103 out of the surface of the sliding rod 105.

[0029] As a preferred example of the above embodiment, the flow measuring device needs to be used in conjunction with a battery or directly plugged in during actual use, and hydraulic oil is injected into the interior of the sleeve 111.

[0030] The Coriolis flow meter includes a measuring tube. In the process of docking the flow measuring device with the grouting port, first pick up the Coriolis flowmeter 101, put the circular plate 103 on the measuring tube, align the sleeve 111 on the surface of the flange body 102 with the hole on the surface of the grouting port docking flange, and then turn on the electromagnet 109. The circular plate 103 is made of magnetic material. The magnetism generated by the electromagnet 109 attracts the circular plate 103 and makes the circular plate 103 approach the flange body 102. The movement of the circular plate 103 compresses the compression spring 106. The circular plate 103 pushes the push-pull rod 108 and the piston 110 to move. Since there is hydraulic oil inside the sleeve 111, the push-pull rod 108 is equivalent to pushing The sleeve 111 moves and enters the interior of the docking flange until the limit block 114 contacts the flange body 102. The sleeve 111 stops moving, while the circular plate 103, the push-pull rod 108 and the piston 110 can still move a short distance to squeeze the hydraulic oil inside the sleeve 111, so that the positioning block 112 extends from the inside of the seal 113. Previously, the positioning block 112 was restricted by the inner wall of the flange body 102 and the other set of flange holes, and would not extend. Until the sleeve 111 passes through the hole of the other set of docking flanges, the positioning block 112 extends and is stuck at the edge of the hole of the docking flange for positioning, without the need for workers to tighten multiple bolts to fix the flow measuring device to the grouting port; During the disassembly process, the electromagnet 109 is first turned off, and then the circular plate 103 moves away from the flange body 102 under the action of the compression spring 106, thereby driving the push-pull rod 108 and the piston 110 to move toward a position away from the positioning block 112. At this time, like pulling the handle of the syringe outward, the positioning block 112 on the outside first retracts to the inner side of the seal 113, and then allows the sleeve 111 to pass through the flange body 102 and the hole on the surface of the other set of flanges. After that, the piston 110 contacts the inner wall of the outlet end of the sleeve 111, and then drags the sleeve 111 out from the inner wall of the other set of flanges. This releases the flow measuring device. Whether it is during installation or disassembly, there is no need to tighten multiple bolts, which is more convenient.

[0031] Example 2 A method for installing a flow measuring device, comprising: Align the sleeve 111 of the flange body 102 with the mounting hole of the grouting port flange; The electromagnet 109 is activated to attract the circular plate 103 to move, and the piston 110 is pushed by the push-pull rod 108 to squeeze the hydraulic oil in the sleeve 111, so that the sleeve 111 is inserted into the hole of the docking flange; When the limit block 114 contacts the flange body 102, the hydraulic oil is continuously squeezed to make the positioning block 112 extend from the sealing member 113, and the positioning block 112 is clamped at the edge of the hole of the mating flange, completing the mechanical locking; When disassembling, the electromagnet 109 is turned off, the compression spring 106 pushes the circular plate 103 to reset, and drives the piston 110 to withdraw the hydraulic oil to retract the positioning block 112, and the sleeve 111 automatically withdraws from the docking flange hole.

[0032] Example 3 The method for measuring the quantity of grouting engineering for concealed engineering based on the Internet of Things comprises the following steps: Obtain slurry data in real time through flow measurement device; Obtain geological parameters through the sensing layer equipment at the infrastructure site; Obtain engineering parameters through infrastructure site sensing layer equipment; Upload slurry data, geological parameters and engineering parameters to the smart construction site platform via the IoT transmission module; The smart construction site platform calculates the grouting quantity based on slurry data and geological parameters through an embedded dynamic measurement model; Specifically, a grouting volume calculation formula is constructed by combining parameters such as slurry diffusion radius and rock porosity, and the model error is dynamically corrected using measured data; As a preferred example of the above embodiment, the Internet of Things transmission module includes an encrypted wireless channel (APN private network), specifically: Infrastructure site perception layer devices are aggregated through edge IoT agent devices; The edge IoT proxy device (including encryption module) accesses the IoT transmission module through the APN wireless private network channel via the secure access platform; The data passes through the perception layer equipment, edge computing box, and IoT management platform, and calls the API interface to obtain data to the smart construction site platform; As a preferred example of the above embodiment, the real-time grouting amount is corrected based on the grouting engineering amount.

[0033] As a preferred example of the above embodiment, multi-dimensional management and control is implemented, integrating video monitoring, data verification, and remote control functions to realize the "measurement-supervision-analysis" closed-loop management of grouting projects. Through video monitoring, data acquisition, engineering measurement, remote alarm control and other dimensions, the supervision and management of the grouting project process is realized.

[0034] Grouting test case: (1) Test preparation: Before the grouting test, all preparatory work must be done. The grouting liquid used is cement-water glass double liquid slurry, and its parameters are as follows: The water-to-ash ratio of cement slurry is 1:0.6-1; Water glass concentration: 35 degrees Baume; modulus: 2.4; When the shaft is excavated to a height of 0.5m above the water level, the bottom seal shall be carried out in time. The temporary bottom seal shall be 200mm thick C20 fine stone concrete with double-layer bidirectional steel mesh inside. The bottom of the shaft shall be grouted with a thickness of 2.5m. The grouting curtain and the grouting bottom seal shall be tightly combined. After grouting, the unconfined compressive strength of the soil shall not be less than 0.8Mpa, and the permeability coefficient of the soil shall not be greater than 5-10cm / s.

[0035] (2) Test content: After selecting the grouting materials and mix ratio, the parameters such as slurry diffusion radius, grouting volume, and grouting pressure are determined. The grouting volume is measured by a flow meter during the grouting process, and the test data is transmitted to the hidden engineering application module of the smart construction site platform for real-time display.

[0036] (3) Test materials, instruments, equipment and tools: Test materials: Tests are conducted based on the grouting materials determined by the test; The test instruments, equipment and tools are shown in the following table: Table 2. List of test instruments, equipment and tools

[0037] (3) Test steps a. Grouting measurement The slurry is prepared according to the mix ratio determined by the slurry mix test. After mixing, the orifice pressure is controlled and the slurry flow rate is controlled at approximately 15L / min. Grouting is completed when the grouting pressure per hole and the grouting volume per hole reach the control standards determined by the indoor test. During the grouting process, grouting data is collected using a flow meter.

[0038] b. Data Analysis Calculate the actual grouting volume: The slurry diffusion radius for a single small-tube grouting system is typically 0.5 to 1.0 meters. This is significantly different from the 2 to 4 meter diffusion radius for deep-hole advanced curtain grouting (tube diameter 75 to 110 mm, grouting pressure 1.5 to 4 MPa). In actual construction, grouting fluid channeling or leakage often occurs due to drilling deviation or geological conditions within the borehole, resulting in highly uneven grouting volumes within each grouting tube. Therefore, the theoretical single-hole grouting volume cannot be used as a control indicator for single-hole grouting and should be calculated based on the theoretical value of the entire row of small-tube grouting systems.

[0039] The total amount is used as a control indicator. Therefore, it is assumed that the rock and soil within the range of 0.5m to 1m above and below the entire row of small pipes have been grouting filled. The grouting volume Q of the small pipe of a single arch should be estimated by the following formula: ; Where: Q is the grouting volume of a single arch tube; H is the angle of the arch tube layout range relative to the center of the circle; R is the radius of the tube position relative to the center of the circle; t is the slurry diffusion radius, 0.5m~1m; L is the effective length of the tube, m; G is the rock porosity (unit: %); The porosity of Class A rock mass ranges from 3% to 5%. Class 1 hard rock 3% to 5%, soft rock 2% to 3%; Class A2 hard rock 2% to 3%, soft rock 1% to 2%.

[0040] Based on this principle, the grouting volume of a single row or multiple rows of small ducts on the same section can be calculated, and the total grouting volume can be obtained by summing up the grouting volume of a single row or multiple rows of small ducts on the same section.

[0041] Data analysis and comparison: Compare the measured data with the calculated data to verify the validity of the measured data. If the data is inconsistent, analyze the possible problems that may arise during the actual grouting process.

[0042] 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.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The concealed engineering grouting quantity measurement system based on the Internet of Things is characterized by: The invention is composed of a flow measurement device, an Internet of Things transmission module and a smart construction site platform. The data collected by the flow measurement device is uploaded to the smart construction site platform through the Internet of Things transmission module. The flow measurement device comprises a Coriolis flowmeter (101), a flange body (102) and a circular plate (103). The flange body (102) and the Coriolis flowmeter (101) are fixedly connected. The circular plate (103) is elastically connected to the flange body (102) through an elastic member. The Coriolis flowmeter (101) and the circular plate (103) are slidably connected. An electromagnet (109) is fixedly provided on the flange body (102). The circular plate (103) is made of magnetic material. The circular plate (103) is provided with a push-pull structure, a first end of the push-pull structure is fixedly connected to the circular plate (103), a second end of the push-pull structure passes through the flange body (102), and a positioning block (112) for locking the docking flange is provided on the push-pull structure.

2. The concealed engineering grouting quantity measurement system based on the Internet of Things according to claim 1 is characterized in that: The push-pull structure includes a sleeve (111) and a push-pull rod (108), wherein the first end of the push-pull rod (108) is bolted to the circular plate (103), the second end of the push-pull rod (108) extends to the inside of the first end of the sleeve (111) and is bolted to a piston (110), and the piston (110) is slidably connected to the inner wall of the sleeve (111).

3. The concealed engineering grouting quantity measurement system based on the Internet of Things according to claim 2 is characterized in that: The second end of the sleeve (111) is sealed, a through hole is formed on the sleeve (111), a positioning block (112) is slidably connected to the through hole, and a sealing member (113) is provided between the positioning block (112) and the through hole.

4. The concealed engineering grouting quantity measurement system based on the Internet of Things according to claim 3 is characterized in that: Both ends of the positioning block (112) are provided with clamping blocks.

5. The concealed engineering grouting quantity measurement system based on the Internet of Things according to claim 4 is characterized in that: The thickness of one end of the sealing member (113) away from the sleeve (111) is smaller than the thickness of the other end thereof, forming a groove for embedding the card block.

6. The concealed engineering grouting quantity measurement system based on the Internet of Things according to claim 3 is characterized in that: A limiting block (114) is fixedly provided on the outside of the sleeve (111), and the limiting block (114) is located between the flange body (102) and the circular plate (103).

7. The concealed engineering grouting quantity measurement system based on the Internet of Things according to claim 1 is characterized in that: The elastic member includes a compression spring (106) and a sliding rod (105). The surface of the circular plate (103) is also penetrated by a plurality of sliding holes (104). The inner wall of the sliding hole (104) is slidably connected to the sliding rod (105). The first end of the sliding rod (105) is welded to the flange body (102). The second end of the sliding rod (105) is bolted to a limiting plate (107). The compression spring (106) is sleeved on the surface of the sliding rod (105). The compression spring (106) is located between the circular plate (103) and the flange body (102).

8. The method for installing a flow measurement device according to claim 7, wherein: include: Align the sleeve (111) of the flange body (102) with the mounting hole of the grouting port flange; The electromagnet (109) is activated to attract the circular plate (103) to move, and the piston (110) is pushed by the push-pull rod (108) to squeeze the hydraulic oil in the sleeve (111), so that the sleeve (111) is inserted into the hole of the docking flange; When the limiting block (114) contacts the flange body (102), the hydraulic oil is continuously squeezed to cause the positioning block (112) to extend from the sealing member (113), and the positioning block (112) is clamped at the edge of the hole of the mating flange, completing the mechanical locking; When disassembling, the electromagnet (109) is turned off, the compression spring (106) pushes the circular plate (103) to reset, and drives the piston (110) to withdraw the hydraulic oil to retract the positioning block (112), and the sleeve (111) automatically withdraws from the docking flange hole.

9. The method for measuring the quantity of grouting work in concealed engineering based on the Internet of Things is characterized by: The method of using the concealed engineering grouting quantity measurement system based on the Internet of Things according to any one of claims 1 to 7 comprises the following steps: Obtain slurry data in real time through flow measurement device; Obtain geological parameters; Get project parameters; Upload slurry data, geological parameters and engineering parameters to the smart construction site platform via the IoT transmission module; The smart construction site platform calculates the grouting volume based on slurry data and geological parameters through an embedded dynamic measurement model.

10. The method for measuring the quantity of grouting work in concealed engineering based on the Internet of Things according to claim 9, characterized in that: The steps of constructing the dynamic measurement model are: Obtain the slurry diffusion radius and construct the grouting volume calculation formula: ； Where: Q is the grouting volume of the small tube, H is the angle of the small tube layout range of the arch relative to the center of the circle, R is the radius of the small tube position relative to the center of the circle, t is the slurry diffusion radius, L is the effective length of the small tube, and G is the porosity of the rock mass; The total grouting volume is obtained by summing up the grouting volumes of a single row or multiple rows of small tubes on the same section.

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