A cement mixing pile body strength detection device

Abstract

This application relates to a cement mixing pile strength testing device, which includes a frame, a hammer and a hammer pad slidably mounted on the frame, a probe rod mounted on the hammer pad, a probe located on the side of the probe rod away from the hammer pad, a drive assembly for driving the hammer, a level bubble meter mounted on the frame for detecting the levelness of the frame, and leveling components at the four corners of the frame's bottom surface for adjusting the distance from the bottom surface of the frame to the ground. This application improves the accuracy of the testing.

Description

Technical Field

[0001] This application relates to the field of cement mixing pile construction technology, and in particular to a cement mixing pile strength testing device. Background Technology

[0002] Cement mixing piles are an effective form of soft soil foundation treatment. They use cement as the main curing agent, and are injected into the soil through a specially designed deep mixer and thoroughly mixed. The series of physicochemical reactions between the cement and the soft soil cause the soil to solidify, forming cement-soil piles with integrity, water stability, and a certain strength, thereby improving the foundation strength. After the initial setting of the cement mixing piles, testing their strength is an important means to ensure their quality.

[0003] Chinese Patent Publication No. CN217379033U discloses a cement mixing pile quality monitoring device. In actual use, this device uses a rotary motor to drive a winding reel, which in turn winds up the pull rope, causing the hollow hammer to rise automatically. When the upper proximity switch is about to contact the fixed base, the proximity switch automatically controls the rotary motor to reverse, allowing the hollow hammer to fall freely under its own weight. Simultaneously, when the lower proximity switch is about to contact the limit plate, the proximity switch automatically controls the rotary motor to rotate forward, thus achieving the purpose of reciprocating up and down movement of the hollow hammer, providing great convenience for operators.

[0004] However, in actual construction sites, many ground surfaces are uneven and have not been leveled. When the mobile frame is moved to an uneven surface for testing, the probe and hollow hammer will be tilted. This will change the direction of the hammering force during the testing process, causing a deviation in the correspondence between the number of hammer blows and the actual penetration resistance, which in turn reduces the accuracy of the test results and has obvious shortcomings. Utility Model Content

[0005] To improve the accuracy of testing cement mixing piles, this application provides a cement mixing pile strength testing device.

[0006] The cement mixing pile strength testing device provided in this application adopts the following technical solution:

[0007] A cement mixing pile strength testing device includes a frame, on which a weight and a hammer pad are slidably mounted. A probe rod is mounted on the hammer pad, and a probe is mounted on the side of the probe rod away from the hammer pad. A drive assembly for driving the weight is mounted on the frame. A level bubble meter is mounted on the frame for detecting the levelness of the frame. Leveling components are mounted at the four corners of the bottom surface of the frame for adjusting the distance from the bottom surface of the frame to the ground.

[0008] By adopting the above technical solution, before testing, workers use a level bubble meter to determine if the frame is tilted. If the frame is not level, workers use four leveling components to adjust the distance from the bottom surface of the four corners of the frame to the ground. Through fine-tuning the height of different corners, the frame is gradually restored to level before testing begins. The level bubble meter and leveling components ensure that the probe and hammer are perpendicular during testing, allowing the hammering force to be accurately transmitted vertically, effectively improving the accuracy of testing cement mixing piles.

[0009] Optionally, the leveling assembly includes a connecting cylinder mounted on the frame, a screw rotatably connected inside the connecting cylinder, the end of the screw extending to the outer surface of the frame and coaxially mounted with a handwheel, limit grooves being formed on opposite sides of the connecting cylinder, a limit block being provided in each limit groove, and a support cylinder being provided on both limit blocks, the support cylinder being sleeved on the outer surface of the screw and threadedly connected at one end to the screw, and the other end of the support cylinder abutting against the ground.

[0010] By adopting the above technical solution, when the frame is uneven, the worker can determine the corners that need to be raised by tilting the direction. Then, the worker can turn the screw by handwheel. Under the limit of the limit groove and the limit block, the screw rotation drives the support cylinder to move towards the ground along the screw axis. The support cylinder continuously descends until it touches the ground and provides support force, gradually raising the height of that side of the frame. Then, by adjusting the support cylinders at different corners in sequence, the bubble in the level bubble meter is centered, ensuring that the frame is in a level state.

[0011] Optionally, each of the four corners of the bottom surface of the frame is rotatably connected to a leg. Each leg is provided with a roller at one end and a movable block at the other end. The outer surface of the frame is provided with an arc groove that slides with the movable block. When the movable block moves from one end of the arc groove to the other end, the roller moves from touching the ground to leaving the ground. Magnetic blocks are embedded in the inner sidewalls at both ends of the arc groove along its length. The movable block is an iron block.

[0012] By adopting the above technical solution, during the movement of the frame, the moving block is attracted to one end of the arc groove by a magnetic block. At this time, the roller is in contact with the ground, making it easy for the worker to push the frame to move it to the detection position. After the frame moves to the detection position, the worker rotates the tripod, and the moving block moves along the arc groove to the other end and is fixed by the magnetic block. At this time, the tripod drives the roller to gradually lift off the ground, thereby avoiding the possibility of frame displacement due to the roller contacting the ground, thus further improving the accuracy of the detection results.

[0013] Optionally, guide grooves are provided on both opposite sides of the frame, the guide grooves are vertically arranged, and guide blocks that slide in cooperation with the guide grooves are provided on both opposite sides of the counterweight and the hammer pad.

[0014] By adopting the above technical solution, the sliding cooperation between the guide block and the guide groove ensures that the hammer and probe fall in a vertical direction, ensuring that the hammer acts accurately on the hammer pad, thereby further improving the accuracy of the test results.

[0015] Optionally, the probe can be detachably connected to the probe rod via a connecting assembly.

[0016] By adopting the above technical solution, the connection component enables a detachable connection between the probe and the probe rod, which makes it convenient for workers to replace different types of probes according to the testing needs of cement mixing piles with different strengths and geological conditions. At the same time, it is convenient to replace worn probes, thus improving the applicability of the testing device.

[0017] Optionally, the connecting assembly includes a connecting block disposed at the bottom end of the probe, a connecting groove that slides with the connecting block on the probe rod, and a pin groove that communicates with each other on the probe rod and the connecting block. A pin rod is slidably connected inside the pin groove, and one end of the pin rod is provided with an abutment block, and the other end is threadedly connected with a fastening block. Both the abutment block and the fastening block abut against the outer surface of the probe rod.

[0018] By adopting the above technical solution, during disassembly, the worker rotates the fastening block to disengage it from the pin rod, then grasps the abutment block to remove the insertion post from the pin slot, and finally pulls the connecting block to disengage it from the connecting slot, thus achieving the disassembly of the probe and the probe rod. During installation, the worker first inserts the connecting block into the connecting slot, then inserts the insertion post into the connecting slot of the connecting block through the pin slot on the probe rod, and then screws the fastening block onto the pin rod. When the opposite end faces of the fastening block and the abutment block are both in contact with the outer surface of the probe rod, the probe installation is complete.

[0019] Optionally, a guide strip is provided on the outer surface of the connecting block, and a guide groove is provided on the inner sidewall of the connecting groove to slide with the guide strip. When the guide strip slides inside the guide groove, the pin grooves on the connecting block and the probe are connected.

[0020] By adopting the above technical solution, the sliding fit between the guide strip and the guide groove provides guidance and positioning for the insertion of the connecting block, eliminating the need for workers to make multiple adjustments to the misaligned pin slots, thereby further improving the convenience of disassembly and assembly for workers.

[0021] Optionally, the probe rod is provided with scale markings along its length.

[0022] By adopting the above technical solution, the scale line provides the testing personnel with an intuitive measurement reference. By observing the alignment between the surface of the mixing pile and the scale line, the depth to which the probe and probe rod penetrate the mixing pile can be understood, thereby determining the strength of the mixing pile.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application sets up a horizontal bubble meter and four leveling components. The horizontal bubble meter and leveling components can ensure that the probe and the hammer are in a vertical state during the testing process, so that the hammering force is accurately transmitted in the vertical direction, which can effectively improve the testing accuracy of cement mixing piles.

[0025] 2. This application incorporates a connecting component, which enables a detachable connection between the probe and the probe rod. This allows workers to easily replace different types of probes according to the testing requirements of cement mixing piles with varying strengths and geological conditions. It also facilitates the replacement of worn probes, thereby improving the applicability of the testing device. Attached Figure Description

[0026] Figure 1 This is a structural diagram of this application.

[0027] Figure 2 This is a cross-sectional view of the rack in an embodiment of this application.

[0028] Figure 3 This is a cross-sectional view of the connecting cylinder in an embodiment of this application.

[0029] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0030] Figure 5 This is an exploded view of the probe rod and probe in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 101. Guide groove; 102. Arc groove; 1021. Magnetic block; 2. Counterweight; 21. Guide block; 3. Hammer pad; 4. Probe rod; 5. Probe; 41. Scale mark; 42. Connecting groove; 421. Guide groove; 6. Drive assembly; 61. Drive motor; 62. Rotating shaft; 63. Steel wire rope; 7. Leg; 71. Roller; 72. Moving block; 8. Leveling bubble meter; 9. Leveling assembly; 91. Connecting cylinder; 911. Limiting groove; 92. Screw; 93. Handwheel; 94. Support cylinder; 941. Limiting block; 10. Connecting assembly; 1001. Connecting block; 1002. Pin rod; 1003. Abutment block; 1004. Fastening block; 11. Pin groove; 12. Guide strip. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a cement mixing pile strength testing device.

[0034] Reference Figure 1 A cement mixing pile strength testing device includes a frame 1, a hammer 2 and a hammer pad 3 slidably connected on the frame 1, a probe 4 fixedly connected on the hammer pad 3, a probe 5 detachably connected to the side of the probe 4 away from the hammer pad 3, and a scale mark 41 set along the length direction at the end of the probe 4 near the probe 5, so that the testing personnel can easily observe the depth of the probe 5 and the probe 4 penetrating the mixing pile.

[0035] Reference Figure 1 A drive assembly 6 is provided on the frame 1. In this embodiment, the drive assembly 6 includes a drive motor 61 fixedly installed on the top of the frame 1. The output shaft of the drive motor 61 is coaxially fixedly connected to a rotating shaft 62. Steel wire ropes 63 are wound on both opposite sides of the outer surface of the rotating shaft 62. The end of the steel wire rope 63 away from the rotating shaft 62 passes through the frame 1 and is connected to the counterweight 2. The two steel wire ropes 63 are respectively arranged on both sides of the counterweight 2.

[0036] Reference Figure 1 and Figure 2 Guide grooves 101 are provided on the inner sidewalls of the frame 1. The guide grooves 101 are vertically arranged. Guide blocks 21 that slide with the guide grooves 101 are fixedly connected to the opposite sides of the hammer 2 and the hammer pad 3. The sliding cooperation between the guide blocks 21 and the guide grooves 101 ensures that the hammer 2 and the probe 4 fall in a vertical direction, ensuring that the hammer 2 accurately acts on the hammer pad 3.

[0037] When the frame 1 moves to the target cement mixing pile position, the drive motor 61 is started. The drive motor 61 drives the rotating shaft 62 to rotate, and the winding reel rotates accordingly to wind up the steel wire rope 63, lifting the hammer 2 upward along the guide groove 101. When the hammer 2 is lifted to the predetermined height, the drive motor 61 is reversed, causing the hammer 2 to fall freely under its own weight, impacting the hammer pad 3. The hammer pad 3 transmits the impact force to the probe rod 4 and the probe 5, causing the probe 5 to penetrate into the cement mixing pile body. Then, the worker records the number of hammer blows for each penetration depth using the scale mark 41. The above operation is repeated until the predetermined detection depth is reached, thus completing the detection.

[0038] Reference Figure 1 , Figure 3 and Figure 4 Each of the four corners of the bottom surface of the frame 1 is rotatably connected to a leg 7. One end of each leg 7 is fixedly connected to a roller 71, and the other end is fixedly connected to a movable block 72. The outer surface of the frame 1 is provided with an arc groove 102 that slides with the movable block 72. When the movable block 72 moves from one end of the arc groove 102 to the other end, the leg 7 rotates from a vertical state to a horizontal state. At this time, the roller 71 moves from a state of contact with the ground to a state of being off the ground. Magnetic blocks 1021 are embedded in the inner sidewalls of both ends of the arc groove 102 along the length direction. The movable block 72 is an iron block.

[0039] When the frame 1 needs to be moved, the worker rotates the stand 7 to a vertical position. At this time, the roller 71 touches the ground, and the stand 7 remains vertical under the attraction of the magnetic block 1021. Then, the worker pushes the frame 1 to move it to the detection position. After the frame 1 moves to the detection position, the worker overcomes the attraction of the magnetic block 1021 and moves the moving block 72 along the arc groove 102 to the other end. At this time, the stand 7 rotates to a horizontal position and drives the roller 71 to lift off the ground. Under the attraction and fixation of the magnetic block 1021, the roller 71 remains lifted off the ground, thereby avoiding the possibility of the frame 1 shifting due to the roller 71 contacting the ground, and improving the accuracy of the detection results.

[0040] Reference Figure 1 , Figure 2 and Figure 3 A level bubble meter 8 is fixedly installed at the top of the frame 1. The level bubble meter 8 is used to detect the levelness of the frame 1. The specific principle is existing technology and will not be described in detail here. Leveling components 9 are provided at the four corners of the bottom surface of the frame 1. Specifically, the leveling components 9 include a connecting cylinder 91 fixedly connected to the bottom surface of the frame 1. A screw 92 is rotatably connected inside the connecting cylinder 91. The end of the screw 92 extends to the outer surface of the frame 1 and is coaxially fixedly connected to a handwheel 93.

[0041] Reference Figure 3Limiting grooves 911 are provided on both sides of the connecting cylinder 91. The limiting grooves 911 are parallel to the axial direction of the connecting cylinder 91. A limiting block 941 is slidably connected in each limiting groove 911. A support cylinder 94 is fixedly connected to both limiting blocks 941. The support cylinder 94 is sleeved on the outer surface of the screw 92 and one end is threaded to the screw 92. When the limiting block 941 abuts against the inner side wall of the limiting groove 911 near the frame 1, the outer surface of the support cylinder 94 is flush with the outer surface of the connecting cylinder 91.

[0042] Before testing, workers use a leveling bubble meter 8 to determine if the frame 1 is tilted. If the frame 1 is not level, workers determine the corners that need to be raised by the direction of tilt. Then, workers use handwheel 93 to rotate screw 92. Under the limit of limit groove 911 and limit block 941, the rotation of screw 92 drives support cylinder 94 to move towards the ground along the axis of screw 92. Support cylinder 94 descends until it touches the ground and provides support force, gradually raising the height of that side of the frame 1. Then, by adjusting the support cylinder 94 at different corners in turn, the bubble in the leveling bubble meter 8 is centered, and finally the testing begins. The setting of leveling bubble meter 8 and leveling component 9 ensures that the probe 4 and the hammer 2 are in a vertical state during the testing process, so that the hammering force is accurately transmitted in the vertical direction, effectively improving the testing accuracy of cement mixing piles.

[0043] Reference Figure 2 and Figure 5 The probe 5 is detachably connected to the probe rod 4 via the connecting assembly 10. Specifically, the connecting assembly 10 includes a connecting block 1001 fixedly connected to the bottom of the probe 5. The probe rod 4 has a connecting groove 42 that slides with the connecting block 1001. The probe rod 4 and the connecting block 1001 have interconnected pin grooves 11. To facilitate the worker's alignment of the pin grooves 11, a guide strip is fixedly connected to the outer surface of the connecting block 1001. The inner side wall of the connecting groove 42 has a guide groove 421 that slides with the guide strip. When the worker inserts the connecting block 1001 into the connecting groove 42 through the sliding engagement of the guide strip and the guide groove 421, the pin grooves 11 on the connecting block 1001 and the probe rod 4 are connected.

[0044] Reference Figure 2 and Figure 5 The connecting assembly 10 also includes a pin rod 1002 that is slidably connected in the pin groove 11. One end of the pin rod 1002 is fixedly connected to an abutment block 1003, and the other end is threadedly connected to a fastening block 1004. Both the abutment block 1003 and the fastening block 1004 abut against the outer surface of the probe rod 4.

[0045] When probe 5 is disassembled due to wear or to meet other testing needs, the worker first rotates the fastening block 1004 to disengage it from the pin rod 1002, then holds the abutment block 1003 to remove the insertion post from the pin slot 11, and finally pulls the connecting block 1001 to disengage it from the connecting slot 42, thus achieving the disassembly of probe 5 from probe rod 4. When installing a new probe 5, the worker first inserts the connecting block 1001 into the connecting slot 42, and then inserts the insertion post into the connecting block through the pin slot 11 on probe rod 4. Inside the connecting groove 42 of 1001, the fastening block 1004 is then screwed into the pin rod 1002. When the opposite end faces of the fastening block 1004 and the abutment block 1003 are in contact with the outer surface of the probe rod 4, the probe 5 is installed. The setting of the connecting assembly 10 realizes the detachable connection between the probe 5 and the probe rod 4, which makes it convenient for workers to replace different types of probes 5 according to the testing needs of cement mixing piles with different strengths and geological conditions. At the same time, it is convenient to replace worn probes 5, thus improving the applicability of the testing device.

[0046] The implementation principle of the cement mixing pile strength testing device in this embodiment is as follows: Before testing, the worker uses a horizontal bubble level 8 to determine whether the frame 1 is tilted. If the frame 1 is not level, the worker determines the corner that needs to be raised by the tilt direction. Then, the worker rotates the screw 92 by the handwheel 93. Under the limit of the limiting groove 911 and the limiting block 941, the screw 92 rotates and drives the support cylinder 94 to move towards the ground along the axis of the screw 92. The support cylinder 94 continuously descends until it touches the ground and provides support force, gradually raising the height of that side of the frame 1. Then, by adjusting the support cylinders 94 at different corners in sequence, the bubble in the horizontal bubble level 8 is centered, and finally the testing begins. The horizontal bubble level 8 and the leveling component 9 ensure that the probe 4 and the hammer 2 are in a vertical state during the testing process, so that the hammering force is accurately transmitted in the vertical direction, effectively improving the testing accuracy of cement mixing piles.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cement mixing pile strength testing device, comprising a frame (1), wherein a weight (2) and a hammer pad (3) are slidably disposed on the frame (1), a probe rod (4) is disposed on the hammer pad (3), a probe (5) is disposed on the side of the probe rod (4) away from the hammer pad (3), and a driving assembly (6) for driving the weight (2) to move is disposed on the frame (1), characterized in that, A level bubble meter (8) is installed on the frame (1). The level bubble meter (8) is used to detect the levelness of the frame (1). A leveling component (9) is installed at each of the four corners of the bottom surface of the frame (1). The leveling component (9) is used to adjust the distance from the bottom surface of the frame (1) to the ground.

2. The cement mixing pile strength testing device according to claim 1, characterized in that, The leveling assembly (9) includes a connecting cylinder (91) disposed on the frame (1). A screw (92) is rotatably connected inside the connecting cylinder (91). The end of the screw (92) extends to the outer surface of the frame (1) and is coaxially provided with a handwheel (93). Limiting grooves (911) are opened on opposite sides of the connecting cylinder (91). A limiting block (941) is provided in each limiting groove (911). A support cylinder (94) is provided on both limiting blocks (941). The support cylinder (94) is sleeved on the outer surface of the screw (92) and one end is threadedly connected to the screw (92). The other end of the support cylinder (94) abuts against the ground.

3. The cement mixing pile strength testing device according to claim 1, characterized in that, The frame (1) has four corners on its bottom surface rotatably connected to legs (7). Each leg (7) has a roller (71) at one end and a moving block (72) at the other end. The outer surface of the frame (1) has an arc groove (102) that slides with the moving block (72). When the moving block (72) moves from one end of the arc groove (102) to the other end, the roller (71) moves from touching the ground to leaving the ground. The inner walls of both ends of the arc groove (102) along the length direction are embedded with magnetic blocks (1021). The moving block (72) is an iron block.

4. The cement mixing pile strength testing device according to claim 1, characterized in that, The frame (1) has guide grooves (101) on both sides opposite to each other. The guide grooves (101) are vertically arranged. The counterweight (2) and the hammer pad (3) are provided with guide blocks (21) on both sides opposite to each other, which slide in cooperation with the guide grooves (101).

5. The cement mixing pile strength testing device according to claim 1, characterized in that, The probe (5) is detachably connected to the probe rod (4) via a connecting assembly (10).

6. The cement mixing pile strength testing device according to claim 5, characterized in that, The connecting assembly (10) includes a connecting block (1001) disposed at the bottom of the probe (5). The probe rod (4) has a connecting groove (42) that slides with the connecting block (1001). The probe rod (4) and the connecting block (1001) have interconnected pin grooves (11). A pin rod (1002) is slidably connected inside the pin groove (11). One end of the pin rod (1002) is provided with an abutment block (1003), and the other end is threadedly connected with a fastening block (1004). Both the abutment block (1003) and the fastening block (1004) abut against the outer surface of the probe rod (4).

7. The cement mixing pile strength testing device according to claim 6, characterized in that, The outer surface of the connecting block (1001) is provided with a guide strip, and the inner side wall of the connecting groove (42) is provided with a guide groove (421) that slides with the guide strip. When the guide strip slides inside the guide groove (421), the pin groove (11) located on the connecting block (1001) and the probe (4) are connected.

8. The cement mixing pile strength testing device according to claim 1, characterized in that, The probe (4) has scale markings (41) along its length.

Images