Foundation bearing capacity measuring device

Abstract

The utility model belongs to the technical field of foundation quality inspection equipment, and particularly provides a foundation bearing capacity measuring device which comprises a base, a main support, a drilling machine, a rotary connecting mechanism, a heavy hammer and a support connecting piece. The drilling machine is assembled on the sliding block through a rotary connecting mechanism, the heavy hammer is assembled on the main support through a supporting connecting piece, the heavy hammer and the supporting connecting piece are located on the opposite sides of the drilling machine, and the supporting connecting piece comprises a connecting frame, a pipe hoop and a guide pipe. According to the scheme, the main support serves as a drilling stroke and heavy hammer height control mechanism, and the stroke control precision of equipment is greatly improved; guiding is conducted through the supporting connecting piece, the accuracy of the drop point of the heavy hammer is greatly improved, it can be guaranteed that the drop point and force of multiple times of hammering are relatively constant in cooperation with the main support, and the accuracy of the measurement result is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of ground testing equipment, and in particular provides a ground bearing capacity testing device. Background Art

[0002] The foundation bearing capacity refers to the bearing potential of the foundation soil per unit area. The foundation bearing capacity measurement result is one of the comprehensive indicators for evaluating foundation stability. The measurement methods include flat plate load test, spiral plate load test, standard penetration test, dynamic penetration test, etc. Among them, the standard penetration test is one of the most commonly used measurement methods.

[0003] The operating procedures of the standard penetration test include drilling and hammering. At present, most of the common drilling equipment and hammering equipment on the market are relatively independent. Some construction workers also manually improve and integrate them and use the two equipment as a bundle. However, the integrated equipment is not stable enough and the transmission error is large. The accuracy of the measurement results is highly dependent on the error correction ability of the technicians. Improper operation often leads to inaccurate measurement results. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a foundation bearing capacity measuring device, including a base, a main support, a drilling rig, a rotating connection mechanism, a weight and a support connection piece, the main support is a square tube, the main support is fixedly installed on the top of the base, a slider is slidably installed inside the main support, the drilling rig is assembled on the slider through the rotating connection mechanism, the weight is assembled on the main support through the support connection piece, and the weight and the support connection piece are located on the opposite side of the drilling rig, a power mechanism is arranged in the main support, the power mechanism is used to provide power in the vertical direction, and the output end of the power mechanism is fixedly connected to the slider;

[0005] The support connecting piece includes a connecting frame, a pipe clamp and a guide pipe. The pipe clamp is a circular ring formed by splicing two half-hoops. The two half-hoops are respectively assembled on the front and rear side walls of the main support through the connecting frame. The guide pipe is inserted into the pipe clamp, and the guide pipe can slide under the action of vertical traction force. The weight is assembled at the lower end of the guide pipe.

[0006] Furthermore, the power mechanism is a screw mechanism, which is composed of a screw, a ball screw sleeve and a motor. The ball screw sleeve is assembled on the screw, and the ball screw sleeve is fixedly connected to the slider. A through hole is provided in the middle of the slider, and the screw passes through the through hole.

[0007] Furthermore, the front and rear side walls of the sliding block are provided with guide grooves, and the inner wall of the main support is correspondingly provided with guide strips, which are embedded in the guide grooves.

[0008] Furthermore, sliding holes are provided on the left and right side walls of the main support, and "J"-shaped connecting pieces are fixedly installed on the left and right side walls of the slider. The connecting pieces can slide in the sliding holes with the slider, and the connecting pieces extend to the outside of the sliding holes. One connecting piece is fixedly connected to the rotating connecting mechanism, and a traction rope is fixedly installed on the other connecting piece, and the end of the traction rope is fixedly connected to the support connecting piece or the heavy hammer.

[0009] Furthermore, a notch is provided on the side wall of the guide tube, the cross section of the guide tube is C-shaped, and the notch faces one side of the main support;

[0010] A first guide wheel frame is arranged on the inner side wall of the connecting frame, a second guide wheel frame is arranged on the top of the inner wall of the pipe clamp, and guide wheels are rotatably mounted on both the first guide wheel frame and the second guide wheel frame.

[0011] Furthermore, a limiting block is arranged on the inner wall of the pipe clamp, and a limiting groove is arranged on the outer wall of the guide tube, and the limiting block and the limiting groove are correspondingly engaged with each other.

[0012] Furthermore, a plug is installed on the top of the guide tube.

[0013] Furthermore, the two ends of the traction rope are fixedly connected to a first traction rope connector and a second traction rope connector respectively, the first traction rope connector is arranged at the center of the upper surface of the weight, and the second traction rope connector is fixedly connected to the slider.

[0014] The beneficial effects of using the utility model are:

[0015] This solution uses the main support as the drilling stroke and weight height control mechanism, greatly improving the equipment's stroke control accuracy;

[0016] The guidance through the supporting connecting parts can greatly improve the accuracy of the landing point of the heavy hammer, and in conjunction with the main support, it can ensure that the landing point and force of multiple hammer strikes are relatively constant, thereby ensuring the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a structural schematic diagram of the main support of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the slider of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the support connector of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the heavy hammer and the guide tube of the utility model;

[0022] Reference numerals include:

[0023] 1. Base;

[0024] 2. Main support; 201. Sliding hole; 202. Lead screw; 203. Ball screw sleeve; 204. Sliding block; 205. Connecting piece; 206. Guide groove; 207. Through hole;

[0025] 3. Drilling machine; 4. Rotating connecting mechanism;

[0026] 5. Heavy hammer; 501. First traction rope connector;

[0027] 6. Support connector; 601. Connecting frame; 602. Pipe clamp; 603. First guide wheel frame; 604. Guide wheel; 605. Second guide wheel frame; 606. Second traction rope connector; 607. Limit block; 608. Guide pipe; 609. Notch; 610. Limit groove; 611. Blocking;

[0028] 7. Traction rope; 8. Scale plate. DETAILED DESCRIPTION

[0029] The utility model is described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1-Figure 5 A foundation bearing capacity measuring device comprises a base 1, a main support 2, a drilling rig 3, a rotating connection mechanism 4, a weight 5 and a support connection member 6. The main support 2 is a square tube, and the main support 2 is fixedly installed above the base 1. A slider 204 is slidably installed inside the main support 2. The drilling rig 3 is assembled on the slider 204 through the rotating connection mechanism 4. The weight 5 is assembled on the main support 2 through the support connection member 6, and the weight 5 and the support connection member 6 are located on the opposite side of the drilling rig 3. A power mechanism is arranged inside the main support 2, and the power mechanism is used to provide power in the vertical direction. The output end of the power mechanism is fixedly connected to the slider 204.

[0031] The support connecting member 6 includes a connecting frame 601, a pipe clamp 602 and a guide tube 608. The pipe clamp 602 is a circular ring formed by splicing two half ring clamps. The two half ring clamps are respectively assembled on the front and rear side walls of the main support 2 through the connecting frame 601. The guide tube 608 is inserted into the pipe clamp 602, and the guide tube 608 can slide under the action of vertical traction force. The heavy hammer 5 is assembled at the lower end of the guide tube 608.

[0032] The rotating connection mechanism 4 is composed of a positioning end, a rotating end and a damping member. The positioning end is connected to the slider 204, and the rotating end is connected to the drilling rig 3. The damping member is arranged between the positioning end and the rotating end. In the absence of external force, the positioning end and the rotating end do not rotate relative to each other.

[0033] A rotating connection mechanism 4 is also provided on the base 1 .

[0034] The maximum acceleration provided by the power mechanism to the slider 204 is not less than the acceleration due to gravity.

[0035] Preferably, the lowest point of the drill rod holder of the drilling rig 3 and the tip of the heavy hammer 5 are located at the same horizontal plane, that is, when the drilling rig 3 drills to the maximum stroke, the tip of the heavy hammer 5 just touches the ground;

[0036] With the main support 2 as a reference, the position of the drill rod of the drilling rig 3 and the position of the lower end of the heavy hammer 5 are symmetrical.

[0037] During the measurement process, the staff sets up the equipment at the drilling position, operates the power mechanism to drive the slide block 204 downward, and the drilling machine 3 moves downward accordingly, and performs the drilling operation at the drilling position;

[0038] After the drilling operation is completed, the worker operates the power mechanism to drive the slide block 204 upward to lift the drilling machine 3, and then inserts the probe rod into the borehole;

[0039] The staff rotates the rotating connection mechanism 4 to rotate the drilling machine 3 to a horizontal state, and rotates the main support 2 to rotate the heavy hammer 5 to the top of the drill hole;

[0040] The staff operates the power mechanism to drive the slider 204 downward, pulls the heavy hammer 5 to a specified height, and then operates the power mechanism to drive the slider 204 upward quickly, allowing the heavy hammer 5 to fall freely and hit the top of the probe rod.

[0041] The power mechanism is a screw mechanism, which is composed of a screw 202, a ball screw sleeve 203 and a motor. The ball screw sleeve 203 is assembled on the screw 202, and the ball screw sleeve 203 is fixedly connected to the slider 204. A through hole 207 is provided in the middle of the slider 204, and the screw 202 passes through the through hole 207.

[0042] The motor is an encoder motor with basic functions such as speed setting, torque setting, and cycle number setting.

[0043] Preferably, the front and rear side walls of the sliding block 204 are provided with guide grooves 206 , and the inner wall of the main support 2 is correspondingly provided with guide strips, which are embedded in the guide grooves 206 .

[0044] Preferably, the left and right side walls of the main support 2 are provided with sliding holes 201, and the left and right side walls of the slider 204 are fixedly installed with "J"-shaped connecting pieces 205, the connecting pieces 205 can slide in the sliding holes 201 along with the slider 204, and the connecting pieces 205 extend to the outside of the sliding holes 201, one connecting piece 205 is fixedly connected to the rotating connection mechanism 4, and a traction rope 7 is fixedly installed on the other connecting piece 205, and the end of the traction rope 7 is fixedly connected to the support connecting piece 6 or the heavy hammer 5.

[0045] The lifting process of the slider 204 will directly drive the drilling rig 3 to lift and lower, and drag the guide tube 608 to slide vertically through the traction rope 7.

[0046] A notch 609 is provided on the side wall of the guide tube 608. The cross section of the guide tube 608 is C-shaped, and the notch 609 faces one side of the main support 2.

[0047] A first guide wheel frame 603 is provided on the inner side wall of the connecting frame 601, and a second guide wheel frame 605 is provided on the top of the inner wall of the pipe hoop 602. Guide wheels 604 are rotatably mounted on both the first guide wheel frame 603 and the second guide wheel frame 605. The position and width of the notch 609 match those of the first guide wheel frame 603. The traction rope 7 passes through the notch 609 and extends to the slider 204.

[0048] The guide wheel 604 abuts against the traction rope 7 to reduce the turning resistance of the traction rope 7 .

[0049] A limiting block 607 is provided on the inner wall of the pipe clamp 602, and a limiting groove 610 is provided on the outer wall of the guide pipe 608. The limiting block 607 and the limiting groove 610 are correspondingly engaged with each other;

[0050] Preferably, a ball is installed in the limiting block 607 to reduce the friction between the limiting block 607 and the limiting groove 610.

[0051] A plug 611 is mounted on the top of the guide tube 608 .

[0052] Preferably, the two ends of the traction rope 7 are fixedly connected to the first traction rope connector 501 and the second traction rope connector 606 respectively, the first traction rope connector 501 is arranged at the center of the upper surface of the weight 5, and the second traction rope connector 606 is fixedly connected to the slider 204;

[0053] The contact point between the traction rope 7 and the guide wheel 604 is located directly above the first traction rope connector 501, ensuring that when the heavy hammer 5 is pulled, the force point is located in the central position, avoiding the sliding trajectory of the guide tube 608 from being deflected, resulting in excessive lifting resistance.

[0054] A strip-shaped hole is provided on the front side wall of the main support 2, and a scale plate 8 is embedded in the strip-shaped hole. The scale plate 8 is made of a transparent material and has scales engraved on the surface.

[0055] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A device for measuring foundation bearing capacity, characterized in that: It includes a base, a main support, a drilling rig, a rotating connection mechanism, a weight and a support connection piece. The main support is a square tube, which is fixedly installed on the top of the base. A slider is slidably installed inside the main support. The drilling rig is assembled on the slider through a rotating connection mechanism. The weight is assembled on the main support through a support connection piece, and the weight and the support connection piece are located on the opposite side of the drilling rig. A power mechanism is arranged inside the main support, which is used to provide power in the vertical direction. The output end of the power mechanism is fixedly connected to the slider. The support connecting piece includes a connecting frame, a pipe clamp and a guide pipe. The pipe clamp is a circular ring formed by splicing two half-hoops. The two half-hoops are respectively assembled on the front and rear side walls of the main support through the connecting frame. The guide pipe is inserted into the pipe clamp, and the guide pipe can slide under the action of vertical traction force. The weight is assembled at the lower end of the guide pipe.

2. A foundation bearing capacity measuring device according to claim 1, characterized in that: The power mechanism is a screw mechanism, which is composed of a screw, a ball screw sleeve and a motor. The ball screw sleeve is assembled on the screw, and the ball screw sleeve is fixedly connected to the slider. A through hole is provided in the middle of the slider, and the screw passes through the through hole.

3. A foundation bearing capacity measuring device according to claim 1, characterized in that: The front and rear side walls of the sliding block are provided with guide grooves, and the inner wall of the main support is correspondingly provided with guide strips, which are embedded in the guide grooves.

4. A foundation bearing capacity measuring device according to claim 1, characterized in that: The left and right side walls of the main support are both provided with sliding holes, and the left and right side walls of the slider are fixedly installed with "J"-shaped connecting pieces, which can slide in the sliding holes with the slider, and extend to the outside of the sliding holes. One connecting piece is fixedly connected to the rotating connecting mechanism, and a traction rope is fixedly installed on the other connecting piece, and the end of the traction rope is fixedly connected to the support connecting piece or the heavy hammer.

5. A foundation bearing capacity measuring device according to claim 1, characterized in that: A notch is provided on the side wall of the guide tube, the cross section of the guide tube is C-shaped, and the notch faces the main support side; A first guide wheel frame is arranged on the inner side wall of the connecting frame, and a second guide wheel frame is arranged on the top of the inner wall of the pipe clamp. Guide wheels are rotatably mounted on both the first guide wheel frame and the second guide wheel frame.

6. A foundation bearing capacity measuring device according to claim 1, characterized in that: A limiting block is arranged on the inner wall of the pipe clamp, and a limiting groove is arranged on the outer wall of the guide pipe. The limiting block and the limiting groove are correspondingly engaged with each other.

7. A foundation bearing capacity measuring device according to claim 1, characterized in that: The top of the guide tube is equipped with a plug.

8. A foundation bearing capacity measuring device according to claim 4, characterized in that: The two ends of the traction rope are fixedly connected to the first traction rope connector and the second traction rope connector respectively. The first traction rope connector is arranged at the center of the upper surface of the weight, and the second traction rope connector is fixedly connected to the slider.

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