A subgrade filling stress monitoring deployment device for goaf road monitoring

Abstract

The utility model discloses a kind of subgrade fill stress monitoring deployment devices for goaf road monitoring, belong to the technical field of subgrade fill stress monitoring, including fine sand bucket, annular porous sand outlet bucket bottom, vertical tooth, folding leg, pressure disc and pull rod, fine sand bucket central upward concave annular porous sand outlet bucket bottom, the outside wall of fine sand bucket is equipped with multiple folding legs, annular porous sand outlet bucket bottom is penetrated with pull rod in the center, the part of pull rod in the upper portion of annular porous sand outlet bucket bottom is equipped with vertical tooth, the part of pull rod in the lower portion of annular porous sand outlet bucket bottom is equipped with pressure disc. The utility model utilizes annular porous sand outlet bottom disc and multiple-angle star-shaped vertical tooth cooperation, eliminate the bridging effect of fine sand, ensure that the fine sand in fine sand bucket can be relatively evenly spread to vibration string type soil pressure sensor, pull rod integrates stirring fluidization and in-situ power hammering double function, and the initial compaction energy level compensation of standardization is realized by detachable pressure disc.

Description

Technical Field

[0001] This utility model belongs to the technical field of roadbed filling stress monitoring, and particularly relates to a roadbed filling stress monitoring deployment device for monitoring roads in mining subsidence areas. Background Technology

[0002] If a road passes through a mining subsidence area, roadbed monitoring is necessary for road safety. In roadbed monitoring in mining subsidence areas, vibrating wire earth pressure gauges are usually buried inside the roadbed. The traditional burial process relies on manually spreading fine sand and compacting it with manual tools. This method has the following significant drawbacks: 1. Manually spreading sand makes it difficult to ensure that the thickness and density of the fine sand above the sensor diaphragm are completely uniform. If the sand is too hard in some areas, stress concentration will occur; if there are gaps, stress shielding will occur. 2. The instantaneous impact force generated by directly dumping fine sand often causes high-precision sensors to tilt, causing the force direction to deviate from the direction of the vertical principal stress of the roadbed. Summary of the Invention

[0003] To overcome the technical problems described in the background, this utility model provides a roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas. It utilizes a ring-shaped porous sand-distributing chassis and a multi-pointed star-shaped vertical insert to eliminate the bridging effect of fine sand, ensuring that the fine sand in the sand bucket can be relatively evenly spread onto the vibrating wire earth pressure sensor. The lifting rod integrates the dual functions of mixing fluidization and in-situ dynamic hammering, and standardized initial compaction energy level compensation is achieved through a detachable pressure plate.

[0004] The technical solution of this utility model is as follows: The beneficial effects of this utility model due to the adoption of the above-mentioned technology are as follows: A roadbed filling stress monitoring deployment device for monitoring roads in mining subsidence areas includes a fine sand bucket, an annular multi-hole sand discharge bucket bottom, vertical insert teeth, folding legs, a pressure plate, and a lifting rod. The fine sand bucket is provided with an annular multi-hole sand discharge bucket bottom, the bottom of which is circular and has multiple sand discharge holes evenly distributed along the circular edge, with the center concave upward. The outer wall of the fine sand bucket is provided with multiple folding legs that provide support and can be folded and stored. A lifting rod passes through the center of the annular multi-hole sand discharge bucket bottom. The part of the lifting rod above the annular multi-hole sand discharge bucket bottom is provided with vertical insert teeth for pressing the fine sand inside the bucket vertically. The part of the lifting rod below the annular multi-hole sand discharge bucket bottom is provided with a pressure plate for hammering the fine sand spread on the vibrating wire earth pressure sensor downward.

[0005] Furthermore, the bottom of the annular porous sand discharge bucket includes a concave platform, sand discharge holes, and a central sleeve. The bottom of the concave platform curves upward and forms a sand-dividing structure at the bottom of the fine sand bucket, which bulges upward in the middle and gradually slopes to the bottom edge of the fine sand bucket. The bottom of the sand-dividing structure is provided with multiple sand discharge holes that are evenly distributed in a circle. The center of the sand-dividing structure is provided with a central sleeve for accommodating the vertical passage of the lifting rod.

[0006] Furthermore, the projection of the vertical teeth onto the horizontal plane is a polygonal star-shaped structure, and the projection of a single angle onto the vertical plane is a triangular structure with the apex angle far away from the lifting rod.

[0007] Furthermore, the folding leg includes a support leg, a locking leg, a locking leg pin, a lower connecting block, and an upper connecting block. The upper side of the outer wall of the fine sand bucket is provided with multiple upper connecting blocks that are evenly distributed in a circle, and the lower side of the outer wall of the fine sand bucket is provided with multiple lower connecting blocks that are evenly distributed in a circle. The upper connecting block and the lower connecting block, which correspond to each other, are respectively swayed and connected to the support leg and the locking leg. The upper and lower corresponding support legs and the locking legs can swing up and down relative to the corresponding upper and lower connecting blocks. The support leg can press against the end of the locking leg away from the lower connecting block and be detachably locked together by the locking leg pin.

[0008] Furthermore, the lower end of the lifting rod is provided with a threaded section, which is located outside the bottom of the fine sand bucket and is threadedly connected to the screw sleeve on the pressure plate.

[0009] 1. This utility model eliminates systematic errors caused by uneven fine sand distribution as much as possible during the deployment of the vibrating wire earth pressure sensor, which has significant engineering significance for long-term safety early warning of roads in mining subsidence areas. In other words, it uses a ring-shaped porous sand-distributing base and a multi-pointed star-shaped vertical insert to eliminate the bridging effect of fine sand and ensure that the fine sand in the sand bucket can be spread relatively evenly on the vibrating wire earth pressure sensor. 2. The lifting rod of this utility model integrates the dual functions of stirring fluidization and in-situ dynamic hammering, and achieves standardized initial compaction energy level compensation through a detachable pressure plate; 3. This utility model is equipped with a detachable folding leg consisting of a support leg and a locking leg, which makes it convenient to mount the fine sand bucket onto the vibrating wire earth pressure sensor. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is the front view of this utility model.

[0012] Figure 3 This is a top view of the present invention.

[0013] Figure 4 This is the left view of this utility model.

[0014] Figure 5 This is a structural diagram of the present invention during disassembly of the lifting rod and locking leg.

[0015] Figure 6 This is the utility model Figure 5 A magnified view of a portion of point A in the middle.

[0016] Figure 7 This is a schematic diagram of the structure of this utility model integrated with the fine sand bucket.

[0017] Figure 8 This is a top view of the present invention.

[0018] Figure 9 yes Figure 8 Sectional view at point BB.

[0019] In the diagram: 1. Lifting rod, 2. Vertical insert tooth, 3. Sand inlet hopper, 4. Support leg, 5. Locking leg, 6. Support foot, 7. Pressure plate, 8. Lower connecting block, 9. Fine sand bucket, 10. Locking leg pin, 11. Lower recess, 12. Sand discharge hole, 13. Socket, 14. Grounding protrusion, 15. Threaded sleeve, 16. Reinforcing rib, 17. Upper connecting block, 18. Lower threaded section, 19. Lower limit pin, 20. Side pin hole, 21. Butt plug, 22. Plug pin hole. Detailed Implementation

[0020] Example 1: As Figures 1-9 As shown, this utility model provides a roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas. It includes a fine sand bucket 9, an annular multi-hole sand outlet bottom, vertical inserts 2, folding legs, a pressure plate 7, and a lifting rod 1. The fine sand bucket 9 has an annular multi-hole sand outlet bottom, the bottom of which is circular with multiple sand discharge holes 12 evenly distributed along the circular edge and concave upwards in the center. Multiple folding legs, which provide support and can be folded for storage, are provided on the outer wall of the fine sand bucket 9. The lifting rod 1 passes through the center of the annular multi-hole sand outlet bottom. The lifting rod 1 adopts a dual-function design, serving as both a mixing shaft and a compaction power shaft. Its lower threaded section 18 is connected to the pressure plate 7. The lifting height is limited by a lower limit pin 19 to prevent the lifting rod 1 from dislodging from the central sleeve, ensuring the continuity of operation. The lifting rod 1, located above the bottom of the annular porous sand discharge bucket, is equipped with vertical insert teeth 2 for pressing the fine sand inside the bucket. The lifting rod 1 is fixed with polygonal star-shaped vertical insert teeth 2. The triangular side projection structure of the vertical insert teeth 2 can not only break up the accumulated sand during the up-and-down reciprocating motion, but also generate a horizontal component force through the inclined surface, which significantly reduces the internal friction angle of the fine sand and ensures that the fine sand is in a highly fluidized state before flowing to the sand discharge hole, thus avoiding uneven thickness of the spread layer caused by flow interruption. The lifting rod 1, located below the bottom of the annular porous sand discharge bucket, is equipped with a pressure plate 7 for hammering the fine sand spread on the vibrating wire earth pressure sensor downward. The funnel flow problem under gravity flow is solved by the annular porous bottom plate and the sand-dividing structure with a central protrusion.

[0021] To facilitate the filling of fine sand into the upper part of the fine sand bucket 9, a funnel-shaped sand inlet 3 is provided at the upper part of the fine sand bucket 9. Multiple reinforcing ribs 16 are evenly distributed between the sand inlet 3 and the outer wall of the fine sand bucket 9 to enhance the stability of the sand inlet 3 and the impact resistance during fine sand filling.

[0022] The bottom of the annular porous sand discharge bucket includes a concave platform 11, a sand discharge hole 12, and a central sleeve. The bottom of the concave platform 11 curves upward and forms a sand-dividing structure at the bottom of the fine sand bucket 9, which is raised in the middle and gradually slopes to the bottom edge of the fine sand bucket 9. The bottom of the sand-dividing structure is provided with a plurality of sand discharge holes 12 that are evenly distributed in a circle. The center of the sand-dividing structure is provided with a central sleeve for accommodating the vertical passage of the lifting rod 1.

[0023] The projection of the vertical insert 2 on the horizontal plane is a polygonal star-shaped structure, and the projection of each corner on the vertical plane is a triangular structure with the apex away from the lifting rod 1. In this way, the polygonal star-shaped vertical insert 2 can not only break up the sand accumulated in the bucket, but its triangular side projection structure can also generate a horizontal component force when moving up and down, ensuring that the fine sand is in a highly fluidized state before flowing to the sand outlet, thus avoiding uneven thickness caused by flow interruption.

[0024] The folding leg includes a support leg 4, a locking leg 5, a locking leg pin 10, a lower connecting block 8, and an upper connecting block 17. The upper side of the outer wall of the fine sand bucket 9 is provided with a plurality of upper connecting blocks 17 evenly distributed in a circle, and the lower side of the outer wall of the fine sand bucket 9 is provided with a plurality of lower connecting blocks 8 evenly distributed in a circle. The upper connecting blocks 17 and the lower connecting blocks 8, which are corresponding to each other, are swaying and connected to the support leg 4 and the locking leg 5 respectively. The upper and lower corresponding support legs 4 and the locking leg 5 can swing up and down relative to the corresponding upper connecting blocks 17 and the lower connecting blocks 8 respectively. The support leg 4 can press against the end of the locking leg 5 away from the lower connecting block 8 and be detachably locked together by the locking leg pin 10.

[0025] To ensure the connection stability between the support leg 4 and the locking leg 5, a pin-locking structure is provided. Specifically, a socket 13 is provided on the support leg 4, and a pin hole 22 is fixedly provided at the end of the locking leg 5 away from the fine sand bucket 9. A side pin hole 20 is transversely penetrating the part of the support leg 4 corresponding to the socket 13, and a pin hole 22 is transversely penetrating the mating block 21. After the mating block 21 is inserted into the corresponding socket 13, the side pin hole 20 and the pin hole 22 are aligned and locked by the locking leg pin 10 passing through them in sequence.

[0026] Since the vibrating wire earth pressure sensor is deployed at the construction site, where the soil is relatively soft, in order to increase the support stability of the support leg 4, a support foot 6 is swung and connected at the end of the support leg 4 away from the fine sand bucket 9. The bottom of the support foot 6 is provided with a grounding protrusion 14 to increase the contact area with the ground.

[0027] The lower end of the lifting rod 1 is provided with a lower threaded section 18, which is located outside the bottom of the fine sand bucket 9 and is threadedly connected to the screw sleeve 15 on the pressure plate 7.

[0028] To ensure that the lifting rod 1 is pulled upward without dislodging from the bottom of the annular porous sand outlet, a lower limit pin 19 is provided transversely on the part of the lifting rod 1 above the lower threaded section 18 and outside the fine sand container 9 to limit the lifting rod 1 from being pulled upward excessively.

[0029] The entire process of using the device is as follows: S11, Pre-positioning of measuring points and leg extension; Level the base surface at the predetermined elevation of the roadbed, place the vibrating wire earth pressure gauge, unfold the folding legs on the side wall of the fine sand bucket 9, lock the support leg 4 and locking leg 5 with the locking leg pin 10, and adjust the angle of the support foot 6 so that the fine sand bucket 9 is stably straddling directly above the sensor. S12. Fine sand grouting and bridge construction preparation; Dry, sieved fine sand is injected into the fine sand bucket 9 through the sand inlet hopper 3. Since the fine sand is prone to "arching" in the bucket, the lifting rod 1 at the top is used to pre-act and put the vertical insert 2 into a ready state. S13, Uniform sand discharge and accelerated guidance; Pull the lifting rod 1 up and down, and use the multi-pointed star-shaped vertical insert teeth 2 to stir the fine sand in the bucket. Under the guidance of the sand distribution structure with the concave middle and inclined edge of the bottom of the annular porous sand outlet bucket, the fine sand flows out by gravity through the evenly distributed sand discharge holes 12. Since the sand discharge path has been geometrically optimized, the fine sand will be evenly sprinkled in a ring around the sensor and on the top surface. S14, Compaction Initialization; After the fine sand has been spread to the predetermined thickness, stop lifting and raise the lifting rod 1 to the lower limit pin 19. Screw the lower threaded section 18 at the bottom of the lifting rod 1 into the pressure plate 7. Using the lifting rod 1 as a power shaft, hammer the pressure plate 7 downward. The pressure plate 7 performs standardized pressure on the fine sand layer above the sensor through vertical kinetic energy conversion. The manual work done by the lifting rod 1 is converted into the vertical impact kinetic energy of the pressure plate 7 to compact the fine sand. , in, This represents the total compaction energy applied to the fine sand layer. Indicates the number of hammer blows. This represents the energy transfer coefficient (affected by the friction between the lifting rod 1 and the central sleeve). This indicates the total mass of lifting rod 1 and its accessories. Represents gravitational acceleration. Indicates the effective stroke for manual lifting; S15. Equipment evacuation; Unscrew the pressure plate 7, pull out the locking leg pin 10, fold the support leg 4, and complete the deployment of a single measuring point. Then, carry out large-area roadbed backfilling construction.

[0030] Example 2: Based on Example 1, since the ground may be uneven, the fine sand bucket 9 may tilt. If it tilts, the fine sand will be spread unevenly downwards. Three circular spirit levels are evenly installed on the upper edge of the fine sand bucket 9. The operator digs the soil to level the surface and centers the bubble of the spirit level, ensuring that the geometric center axis of the fine sand bucket 9 coincides with the gravity line, so that the bottom of the fine sand bucket 9 is horizontal.

[0031] Example 3: Based on Example 2, since there may be a problem that the fine sand bucket 9 is not aligned with the center of the vibrating wire earth pressure sensor, resulting in uneven spreading of fine sand from the fine sand bucket 9 to the vibrating wire earth pressure sensor, when using it, first try to insert the lifting rod 1 down and press it against the center of the vibrating wire earth pressure sensor, and then level the entire device to achieve alignment between the fine sand bucket 9 and the center of the vibrating wire earth pressure sensor.

[0032] The corresponding usage process at this time is as follows: S31, Pre-positioning of measuring points and leg extension; Level the roadbed surface, place the sensors, unfold the folding legs and lock them with locking pins 10 to ensure stable three-way support; S32. Fine sand grouting and centering verification; The coaxiality is checked by physically touching the center of the sensor with the bottom end of the lifting rod 1, and standard fine sand is injected through the sand inlet hopper 3. S33, Uniform sand discharge and accelerated guidance; The operator pulls the lifting rod 1 up and down, and the vertical insert 2 drives the fine sand to evenly cover the sensor through the annular multi-hole, and the thickness is controlled by the number of lifting operations. S34, Compaction Initialization; Screw the pressure plate 7 into the bottom of the lifting rod 1, and use the lower limit pin 19 as a stroke reference to perform standardized hammering compaction; S35. Equipment evacuation; Unscrew the pressure plate 7, fold the storage device, and proceed to the next backfilling process.

Claims

1. A roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas, comprising a fine sand bucket (9), characterized in that: It also includes an annular porous sand outlet bottom, vertical insert teeth (2), folding legs, pressure plate (7) and lifting rod (1). The fine sand bucket (9) is provided with the annular porous sand outlet bottom. The bottom of the annular porous sand outlet bottom is circular and has multiple sand discharge holes (12) evenly distributed along the circular edge and the center is concave upward. The outer wall of the fine sand bucket (9) is provided with multiple folding legs that provide support and can be folded and stored. The lifting rod (1) runs through the center of the annular porous sand outlet bottom. The part of the lifting rod (1) above the annular porous sand outlet bottom is provided with the vertical insert teeth (2) for pressing the fine sand in the bucket body up and down. The part of the lifting rod (1) below the annular porous sand outlet bottom is provided with the pressure plate (7) for hammering the fine sand spread on the vibrating wire earth pressure sensor downward.

2. The roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas according to claim 1, characterized in that: The bottom of the annular porous sand discharge bucket includes a concave platform (11), the sand discharge holes (12) and a central sleeve. The bottom of the concave platform (11) curves upward and forms a sand-dividing structure at the bottom of the fine sand bucket (9) that bulges upward in the middle and gradually slopes to the bottom edge of the fine sand bucket (9). The bottom of the sand-dividing structure is provided with a plurality of sand discharge holes (12) that are evenly distributed in a circle. The center of the sand-dividing structure is provided with the central sleeve for accommodating the vertical passage of the lifting rod (1).

3. The roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas according to claim 2, characterized in that: The projection of the vertical insert (2) onto the horizontal plane is a polygonal star-shaped structure, and the projection of a single angle onto the vertical plane is a triangular structure with the apex angle away from the lifting rod (1).

4. The roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas according to claim 3, characterized in that: The folding leg includes a support leg (4), a locking leg (5), a locking leg pin (10), a lower connecting block (8), and an upper connecting block (17). The upper side of the outer wall of the fine sand bucket (9) is provided with a plurality of upper connecting blocks (17) evenly distributed in a circle. The lower side of the outer wall of the fine sand bucket (9) is provided with a plurality of lower connecting blocks (8) evenly distributed in a circle. The upper connecting block (17) and the lower connecting block (8) corresponding to each other are respectively swayed and connected to the support leg (4) and the locking leg (5). The upper and lower corresponding support leg (4) and the locking leg (5) can swing up and down relative to the corresponding upper connecting block (17) and the lower connecting block (8). The upper and lower corresponding support leg (4) and the locking leg (5) can press against the end of the locking leg (5) away from the lower connecting block (8) and be detachably locked together by the locking leg pin (10).

5. A roadbed fill stress monitoring deployment device for monitoring roads in mining subsidence areas according to claim 4, characterized in that: The lower end of the lifting rod (1) is provided with a lower threaded section (18), which is located outside the bottom of the fine sand bucket (9) and is threadedly connected to the screw sleeve (15) on the pressure plate (7).

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