Engineering geology foundation bearing detection device

Abstract

The utility model discloses an engineering geology foundation bearing detection device which comprises a base, a detection rod, a connecting rod, a counter weight and a limiting mechanism, the top of the base is provided with a vertically-through detection hole, N stand columns are fixedly arranged on the top of the base and located on the periphery of the detection hole at intervals, and the tops of the N stand columns are jointly and fixedly provided with a top plate. N connecting lugs are fixedly arranged on the periphery of the top of the detection rod at intervals and slidably sleeve the corresponding stand columns respectively, the connecting rod is fixedly arranged on the top of the detection rod, the outer side wall of the connecting rod is fixedly sleeved with a limiting block, the top of the connecting rod movably penetrates through the top plate, the heavy hammer movably sleeves the connecting rod, and the limiting mechanism is arranged on the top plate. The connecting rod is limited to move upwards. Through the arrangement, the detection rod can be prevented from moving upwards in the process of lifting the heavy hammer, and the accuracy of the detection result of the device on the bearing capacity of the foundation is improved.

Description

Technical Field

[0001] This utility model belongs to the field of engineering testing technology, specifically relating to an engineering geological foundation bearing capacity testing device. Background Technology

[0002] To determine the maximum bearing capacity of a foundation under building loads and provide accurate parameters for engineering design, it is necessary to test the bearing capacity of the foundation. In practice, the dynamic penetration test is commonly used to test the bearing capacity of the foundation. This test typically involves driving a probe into the foundation and recording the number of hammer blows required to drive the probe to a certain depth to reflect the bearing capacity of the foundation.

[0003] Chinese patent CN214530598U discloses a foundation bearing capacity measuring device. The device includes a base plate, a scale plate fixedly installed on the top surface of the base plate, a detection hole on the top surface of the base plate, a probe rod on the top surface of the detection hole, a weight on the top surface of the probe rod, and a limit post movably connected to the outer circular side wall of the weight. The above solution utilizes a baffle fixedly installed on the top of the scale plate so that when the operator pulls the weight upward, the baffle abuts against the limit post, ensuring that the weight is lifted to the same position each time.

[0004] During use, the probe rod is threadedly connected to the hammer at the top, which causes the probe rod to be lifted along with the hammer. This lifting process can easily cause the surrounding foundation to collapse, creating additional resistance to the probe rod's re-insertion into the foundation, resulting in low accuracy of the experimental results. Utility Model Content

[0005] The present invention aims to provide an engineering geological foundation bearing capacity testing device to solve the problem of low accuracy of experimental results in the above-mentioned solutions.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An engineering geological foundation bearing capacity testing device includes a base, a probe rod, a connecting rod, a counterweight, and a limiting mechanism. The top of the base has a vertically penetrating detection hole, and N columns are fixedly arranged at intervals around the outer periphery of the detection hole on the top of the base. A top plate is fixedly arranged on the top of the N columns, where N is a natural number greater than or equal to 2. N connecting lugs are fixedly arranged at intervals around the outer periphery of the top of the probe rod, and each of the N connecting lugs is slidably sleeved on a corresponding column. The connecting rod is fixedly arranged on the top of the probe rod along its axial direction, and a limiting block is fixedly sleeved on the outer side wall of the connecting rod. The top of the connecting rod movably passes through the top plate. The counterweight is movably sleeved on the connecting rod between the probe rod and the limiting block. The limiting mechanism is arranged on the top plate to restrict the upward movement of the connecting rod.

[0008] The principle and effects of this technical solution:

[0009] During measurement, the base is placed on the surface of the foundation to be measured, so that the bottom of the probe rod contacts the surface of the foundation. Then, the weight is lifted upwards, and when the top of the weight contacts the bottom of the limiting block, the weight is released to allow it to fall freely and strike the probe rod. The limiting mechanism prevents the connecting rod from moving upwards when the limiting block is impacted by the upward weight, thus preventing the probe rod from moving upwards. The above steps are repeated until the probe rod extends into the foundation to a certain length. The number of times the weight strikes the probe rod is recorded, thereby testing the bearing capacity of the foundation.

[0010] By setting the hammer so that the top of the hammer contacts the bottom of the limiting block, it is possible to ensure that the hammer is lifted to the same height relative to the probe rod each time, and to prevent the probe rod from moving upward during the lifting of the hammer, thus solving the problem of low accuracy of experimental results in the above scheme.

[0011] In this utility model, the top plate has a through hole, the top of the connecting rod passes through the through hole, the inner side wall of the through hole is provided with a limiting groove along the horizontal direction, the end wall of the limiting groove is provided with a pin hole that extends to the outer side wall of the top plate, the limiting mechanism includes a slider that is slidably embedded in the limiting groove, and a ratchet rack that is vertically arranged on the side of the connecting rod near the limiting groove, the end of the slider away from the ratchet rack is rotatably connected to a lever, the lever is slidably passed through the pin hole, a compression spring is sleeved between the end wall of the limiting groove and the slider outside the lever, and a guide ramp that cooperates with the ratchet rack is provided on the top of the end of the slider near the ratchet rack.

[0012] The principle and effects of this technical solution:

[0013] When the hammer strikes the probe rod and pushes it downward, the connecting rod moves downward accordingly, and the ratchet pushes the slider into the limiting groove. When the hammer is lifted upward and makes contact with the limiting block, the connecting rod tends to move upward. At this time, the compression spring pushes the slider to abut against the ratchet, and the bottom of the slider abuts against the straight section of the ratchet, thereby preventing the slider from moving upward.

[0014] The above settings achieve the purpose of preventing the connecting rod from moving upward when the limiting block is impacted upward by the hammer, thus improving the practicality of the device.

[0015] In this utility model, the outer side wall of the top plate is recessed with a groove around the pin hole, and a locking block is fixedly provided on the outer side wall of the end of the lever away from the slider, and the locking block can be locked in the groove.

[0016] The principle and effects of this technical solution:

[0017] Before measurement, pull out and rotate the lever to make the side wall of the locking block abut against the outer side wall of the top plate. At this time, the slider is in the limiting groove and the compression spring is in a compressed state. Then move the connecting rod up and down to make the bottom of the probe abut against the surface of the foundation. After the device is installed, rotate the lever to make the locking block lock into the corresponding slot. The compression spring pushes the slider to move closer to the connecting rod.

[0018] The above settings make it easy for test personnel to install this device.

[0019] In this invention, the outer wall of the probe is vertically marked with graduation lines. This design allows test personnel to easily observe the depth of the probe penetrating the foundation.

[0020] In this invention, multiple drill rods are slidably inserted through both sides of the top of the base. This arrangement secures the base to the ground surface, improving the stability of the device during testing.

[0021] In this invention, the top of the probe rod is recessed with a threaded hole along its axial direction, and the bottom of the connecting rod is threaded into the threaded hole. This design allows the probe rod and connecting rod to be separated, reducing the space occupied by the device when not in use and facilitating its transport.

[0022] In this invention, handles are symmetrically fixed to the outer wall of the hammer. This design facilitates the lifting of the hammer by the test personnel, improving the practicality and safety of the device. Attached Figure Description

[0023] Figure 1 This is an isometric drawing of the present invention;

[0024] Figure 2 Disassembly of the components of this utility model Figure 1 ;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 Disassembly of the components of this utility model Figure 2 ;

[0027] Figure 5 This is a partial sectional view of the present invention. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0029] The reference numerals in the accompanying drawings of the instruction manual include: 10, base; 11, detection hole; 12, column; 13, top plate; 131, through hole; 132, limiting groove; 133, pin hole; 134, slot; 14, chisel; 20, probe rod; 21, connecting lug; 22, scale line; 23, screw hole; 24, roller; 30, connecting rod; 31, limiting block; 40, counterweight; 41, handle; 50, limiting mechanism; 51, slider; 511, lever; 512, locking block; 513, compression spring; 52, ratchet rack.

[0030] Example:

[0031] As attached Figure 1-5 As shown, this utility model discloses an engineering geological foundation bearing capacity testing device, including a base 10, a probe 20, a connecting rod 30, a counterweight 40, and a limiting mechanism 50. The top of the base 10 has a vertically penetrating detection hole 11, and N columns 12 are fixedly arranged at intervals around the outer periphery of the detection hole 11 on the top of the base 10. The tops of the N columns 12 are all fixedly mounted on a top plate 13, where N is a natural number greater than or equal to 2. The outer periphery of the top of the probe 20 has N connecting ears 21 fixedly arranged at intervals, and the N connecting ears 21 are respectively slidably sleeved on the corresponding columns. Each of the column 12 has a roller 24 rotatably mounted in each of the connecting ears 21, and there is a gap between each of the connecting ears 21 and the corresponding column 12. The connecting rod 30 is fixedly mounted on the top of the probe rod 20 along the axial direction, and a limiting block 31 is fixedly sleeved on the outer side wall of the connecting rod 30. The top of the connecting rod 30 is movably inserted through the top plate 13. The counterweight 40 is movably sleeved on the connecting rod 30 between the probe rod 20 and the limiting block 31, and there is a gap between the counterweight 40 and the connecting rod 30. The limiting mechanism 50 is mounted on the top plate 13 to restrict the upward movement of the connecting rod 30.

[0032] In specific implementation, each connecting ear 21 is provided with a roller 24, which is located between the column 12 and the connecting rod 30. The axis of the roller 24 is perpendicular to the axis of the column 12, and the roller 24 and the column 12 are in rolling friction contact.

[0033] In this embodiment, the top plate 13 has a through hole 131, the top of the connecting rod 30 passes through the through hole 131, and there is a gap between the inner wall of the through hole 131 and the connecting rod 30. The inner wall of the through hole 131 is provided with a limiting groove 132 in the transverse direction. The end wall of the limiting groove 132 is provided with a pin hole 133 that extends to the outer wall of the top plate 13. The limiting mechanism 50 includes a slider 51 that is slidably embedded in the limiting groove 132, and a ratchet 52 that is vertically provided on the side of the connecting rod 30 near the limiting groove 132. The end of the slider 51 away from the ratchet 52 is rotatably connected to a lever 511. The lever 511 slides through the pin hole 133. A compression spring 513 is sleeved between the end wall of the limiting groove 132 and the slider 51. The top of the slider 51 near the ratchet 52 is provided with a guide slope that cooperates with the ratchet 52.

[0034] In this embodiment, the outer wall of the top plate 13 is recessed with a slot 134 around the pin hole 133, and a locking block 512 is fixedly provided on the outer wall of the end of the lever 511 away from the slider 51. The locking block 512 can be locked in the slot 134.

[0035] In this embodiment, the outer side wall of the probe rod 20 is provided with scale lines 22 along the vertical direction.

[0036] In this embodiment, multiple drill rods 14 are slidably inserted through both sides of the top of the base 10.

[0037] In this embodiment, the top of the probe 20 is recessed with a screw hole 23 along its axial direction, and the bottom of the connecting rod 30 is threaded into the screw hole 23.

[0038] In this embodiment, handles 41 are symmetrically fixed to the outer side wall of the weight 40.

[0039] The specific implementation process is as follows:

[0040] During measurement, the base 10 is placed on the surface of the foundation to be measured, so that the bottom of the probe 20 contacts the surface of the foundation. Then, the weight 40 is lifted upward. When the top of the weight 40 contacts the bottom of the limiting block 31, the weight 40 is released and allowed to fall freely, striking the probe 20. The limiting mechanism 50 prevents the connecting rod 30 from moving upward when the limiting block 31 is impacted by the weight 40, thus preventing the probe 20 from moving upward. The above steps are repeated until the probe 20 extends into the foundation to a certain length. The number of times the weight 40 strikes the probe 20 is recorded, thereby testing the bearing capacity of the foundation.

[0041] When the hammer 40 strikes the probe rod 20 and pushes it downward, the connecting rod 30 moves downward accordingly, and the ratchet 52 pushes the slider 51 to move into the limiting groove 132. When the hammer 40 is lifted upward and makes contact with the limiting block 31, the connecting rod 30 tends to move upward. At this time, the compression spring 513 pushes the slider 51 to abut against the ratchet 52, and the bottom of the slider 51 abuts against the straight section of the ratchet 52, thereby preventing the slider 51 from moving upward.

[0042] Before measurement, pull out and rotate lever 511 to make the side wall of locking block 512 abut against the outer side wall of top plate 13. At this time, slider 51 is located in limiting groove 132 and compression spring 513 is in a compressed state. Move connecting rod 30 up and down to make the bottom of probe 20 abut against the surface of foundation. After the device is installed, rotate lever 511 to make locking block 512 lock into corresponding slot 134. Compression spring 513 pushes slider 51 to move closer to connecting rod 30.

[0043] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An engineering geological foundation bearing detection device, characterized in that, include: The base has a detection hole that runs vertically through the top, and N columns are fixedly installed at intervals around the outer periphery of the detection hole on the top of the base. A top plate is fixedly installed on the top of the N columns, where N is a natural number greater than or equal to 2. The probe rod has N connecting ears fixedly arranged at intervals on the outer periphery of its top, and the N connecting ears are respectively slidably sleeved on the corresponding uprights; A connecting rod is fixedly installed on the top of the probe rod along the axial direction, and a limiting block is fixedly sleeved on the outer side wall of the connecting rod, and the top of the connecting rod is movably inserted through the top plate; A counterweight, which is movably sleeved on the connecting rod between the probe rod and the limiting block; A limiting mechanism, which is disposed on the top plate, is used to limit the upward movement of the connecting rod.

2. The engineering geology foundation bearing detection device of claim 1, wherein: The top plate has a through hole, and the top of the connecting rod passes through the through hole. A limiting groove is provided on the inner side wall of the through hole in the horizontal direction. A pin hole is provided on the end wall of the limiting groove, which extends to the outer side wall of the top plate. The limiting mechanism includes a slider that is slidably embedded in the limiting groove and a ratchet rack that is vertically arranged on the side of the connecting rod near the limiting groove. A lever is rotatably connected to the end of the slider away from the ratchet rack. The lever slides through the pin hole. A compression spring is sleeved between the end wall of the limiting groove and the slider. A guide slope that cooperates with the ratchet rack is provided on the top of the slider near the ratchet rack.

3. The engineering geology foundation bearing detection device of claim 2, wherein: The outer wall of the top plate is recessed with a groove around the pin hole, and a locking block is fixedly provided on the outer wall of the end of the lever away from the slider. The locking block can be locked in the groove.

4. The engineering geology foundation bearing detection device of claim 3, wherein: The outer wall of the probe is vertically marked with scale lines.

5. The engineering geological foundation bearing capacity testing device as described in claim 4, characterized in that: Multiple drill rods are slidably inserted through both sides of the top of the base.

6. The engineering geology foundation bearing detection device of claim 5, wherein: The top of the probe rod is recessed with a screw hole along its axial direction, and the bottom of the connecting rod is threaded into the screw hole.

7. The engineering geology foundation bearing detection device of claim 6, wherein: The outer side wall of the hammer is symmetrically fixed with handles.

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