Micro-modified flat plate load test device in a narrow space and its test method

Abstract

The present invention discloses a micro-modified flat plate load test device in a narrow space and a test method thereof, which belongs to the field of load test technology, and comprises a lifting platform, a ground anchor, and a grabbing mechanism, wherein the ground anchor is installed at the four corners of the lifting platform, and is used to adjust the height of the lifting platform and fix the lifting platform, the pressure plate is placed on the foundation to be tested, a steel platform is arranged above the pressure plate for stacking concrete test blocks, and a grabbing mechanism is arranged on the back of the lifting platform, and the grabbing mechanism is used to grab the concrete test blocks, so as to solve the problem that the crane arm cannot enter and exit the existing house in a narrow space to stack and install concrete test blocks.

Description

Technical Field

[0001] The invention belongs to the technical field of load testing, and in particular relates to a micro-modified flat plate load testing device in a narrow space and a testing method thereof. Background Art

[0002] The load test is a field test in which loads are applied step by step to the foundation through a steel platform of a certain area on site to measure the changes in the settlement of natural foundations, single piles or composite foundations with the load, so as to determine the bearing capacity and deformation characteristics of the foundation soil. Concrete test blocks are usually required to be stacked on the steel platform for counterweight. Concrete test blocks are usually stacked by crane, but in a small space, the crane is too large and stacking is not very convenient. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a micro-modified flat plate load test device in a narrow space and a test method thereof.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A micro-modified flat plate load test device in a narrow space and a test method thereof, comprising a lifting platform, a ground anchor, a steel platform, a grabbing mechanism, a dust removal mechanism and a jack;

[0006] The lifting platform comprises a lifting plate, and ground anchors are installed at the four corners of the lifting plate. A dust removal mechanism is slidably provided on the side of the lifting plate. The ground anchor comprises a fixed anchor, which is slidably connected to the lifting plate. A lower circular ring is fixedly provided on the fixed anchor, and a second threaded rod is threadedly matched on the lower circular ring. A second limiting rod is fixedly and slidably provided on the lower circular ring, and an upper circular ring is fixedly provided on the top of the second limiting rod. The upper circular ring is slidably connected to the fixed anchor, the upper circular ring is detachably connected to the lifting plate, and the second threaded rod is rotatably connected to the upper circular ring, a first gear is fixedly provided at the rotatable connection between the second threaded rod and the upper circular ring, and a second gear is rotatably provided on the bottom surface of the lifting plate, and the second gear is meshed with the first gear;

[0007] The grabbing mechanism comprises two movable grooves slidably provided on the back of the lifting plate, movable members are slidably provided on the two movable grooves, rotating blocks are rotatably provided on the two movable members, a tenth motor is fixedly provided at the rotational connection between the two rotating blocks and the two movable members, a first telescopic cylinder is fixedly provided on the two rotating blocks, rectangular blocks are fixedly provided at the output ends of the first telescopic cylinder, cylindrical shafts are rotatably provided on the two rectangular blocks, and one end of the two cylindrical shafts is fixedly connected with a U-shaped clip;

[0008] The dust removal mechanism is slidably arranged on the side of the lifting platform, including a rectangular member, a U-shaped plate is slidably arranged on the rectangular member, a bent back plate is fixedly arranged on the U-shaped plate, a third telescopic cylinder is rotatably arranged on the bent back plate, a connecting block is fixedly arranged on the output end of the third telescopic cylinder, a bearing platform is rotatably arranged on the connecting block, a knife edge is arranged on one side of the bearing platform, and a scraper is arranged on the other side of the bearing platform;

[0009] The jack is installed under the steel platform, a grabbing mechanism is provided on the back of the lifting platform, and a dust removal mechanism is installed on the side of the lifting platform. There are mounting holes at the four corners of the lifting plate, and ground anchors are installed in the mounting holes.

[0010] Two mounting blocks are fixedly provided on the side of the lifting plate, a first threaded rod is rotatably provided between the two mounting blocks, a first limiting rod is fixedly provided, one end of the first threaded rod is connected to a first motor, the first threaded rod is threadedly matched with a dust removal mechanism, the dust removal mechanism is slidably connected with the first limiting rod, and the first motor drives the first threaded rod to rotate;

[0011] The top of the fixing anchor is detachably connected with a round stopper, the fixing anchor is slidably connected to the mounting hole, and the round stopper is located above the mounting hole, wherein the fixing anchor is detachably connected to the round stopper by threaded connection, clamping connection or hooking connection, and the upper circular ring is detachably connected to the lifting plate by clamping connection or magnetic attraction;

[0012] The first gear is fixedly provided at the rotation connection between the second threaded rod and the upper circular ring member, and the bottom surface of the lifting plate is also rotatably provided with a first pulley, a connecting shaft is fixedly provided on the first pulley, and a second gear is fixedly provided on the connecting shaft, and the second gear meshes with the first gear for transmission, and a second pulley is rotatably provided at the four corners of the back side of the lifting plate, and a third pulley is rotatably provided at both ends of the lifting plate, and the number of the first pulleys is four, respectively arranged beside the four mounting holes, the number of the second pulleys is four, respectively arranged at the four corners of the lifting plate, and the number of the third pulleys is two, respectively arranged at both ends of the lifting plate, and the spacing between the two third pulleys is smaller than the spacing between the first pulleys at the two ends, and the four first pulleys, the four second pulleys and the two third pulleys are connected by a first synchronous belt, and one of the second pulleys is connected to a second motor, and the second motor is fixed to the lifting plate through the second motor mounting plate;

[0013] The grabbing mechanism includes two symmetrically arranged threaded grooves on the back of the lifting plate, and a clamping block is also arranged on the lifting plate at the two threaded grooves. A third threaded rod is rotatably arranged in the two threaded grooves, and a movable groove is threadedly matched on the third threaded rod. The movable groove is slidably connected to the threaded groove. A fourth threaded rod is rotatably arranged in the movable groove, and a movable member is threadedly matched on the fourth threaded rod. The movable member is slidably connected to the movable groove. The third threaded rod is driven by a third motor, and the fourth threaded rod is driven by a fourth motor.

[0014] The tenth motor is fixedly connected to the moving part and rotates synchronously. The cylindrical shaft is connected to the fifth motor, which is fixedly connected to the rectangular block. The number of the clips is two and they are symmetrically arranged.

[0015] The rectangular member is threadedly connected to the first threaded rod and slidably connected to the first limit rod. The first motor drives the rectangular member to slide on the first limit rod. A second telescopic cylinder and a telescopic rod are fixedly provided on the rectangular member. A U-shaped plate is fixedly provided on the output end of the second telescopic cylinder and the extension end of the telescopic rod. A bending back plate is fixedly provided on the U-shaped plate. A first synchronous wheel and a second synchronous wheel are rotatably provided on the bending back plate. The first synchronous wheel and the second synchronous wheel are connected by a second synchronous belt. A seventh motor is connected to the second synchronous wheel, and the seventh motor is fixedly connected to the bending back plate.

[0016] The third telescopic cylinder is fixedly connected to the first synchronous wheel and rotates coaxially. An eighth motor is fixedly arranged on the connecting block, and the eighth motor drives the bearing platform to rotate.

[0017] The test method of the test device comprises the following steps:

[0018] S1: When in use, first install the pressure plate on the pile head to be tested, install the steel platform above the pressure plate, and install the jack between the pressure plate and the steel platform. Finally, neatly stack the concrete test blocks on the steel platform to conduct a flat plate load test. Before the test begins, fix four anchors around the foundation to be tested, and install the lifting platform on the anchors. The second gear is driven by the second motor to rotate, and the second gear is meshed with the first gear to achieve the rotation and upward movement of the second threaded rod, and further achieve the upward movement of the upper circular ring. Since the upper circular ring and the lifting plate are detachably connected, that is, the lifting plate moves upward synchronously with the upper circular ring, and the lifting plate is lifted to a suitable height, which is convenient for the grabbing mechanism on the lifting plate to grab the concrete test block;

[0019] The specific grasping steps are: the third motor drives the third threaded rod to rotate and the fourth motor drives the fourth threaded rod to rotate, so as to realize the movement of the moving part, and then cooperate with the tenth motor to drive the two U-shaped clips to rotate, so as to finally realize the clamping function of the U-shaped clip and the position change of the U-shaped clip. The relative rotation of the two U-shaped clips can realize the grasping of the concrete test block, and then the position change of the U-shaped clip is realized by the rotation of the third threaded rod and the fourth threaded rod. The U-shaped clip first grasps the concrete test block, and then moves with the concrete test block, so as to realize the neat stacking of the concrete test block on the steel platform for load test.

[0020] S2: The gripping mechanism cooperates with the dust removal mechanism to realize the dust removal operation of the pressure plate. The specific steps are: after the pressure plate is clamped by the gripping mechanism, the third telescopic cylinder is rotated by the seventh motor, and the bearing platform is flipped to a vertical state. At this time, the blade on the bearing platform is facing the lower plate of the pressure plate, and the second telescopic cylinder is used to make the blade contact with the lower plate of the pressure plate, and the first motor is used to drive the first threaded rod to realize the movement of the dust removal mechanism. During the movement, the blade can scrape off the dirt on the lower plate. After the dirt on the lower plate is scraped off, the blade is retracted, and the fifth motor on the gripping mechanism is controlled to rotate the U-shaped clamp. The rotation of the two U-shaped clamps will move the upper The clamped pressure plate is turned over until the upper plate faces downward, and the above steps are repeated. The soil on the upper plate is scraped off with a knife edge. During the reversal of the pressure plate, the soil in the front and rear gaps between the upper and lower steel bars of the pressure plate will be poured out. The bearing platform on the gripping mechanism is controlled to be in a horizontal state, and the pressure plate is placed on the bearing platform through the cooperation of the gripping mechanism. The bearing platform is rotated by degrees through the eighth motor, and then clamped by the gripping mechanism. The gaps on the left and right positions of the pressure plate can be turned over to the front and rear positions, and the gripping mechanism is controlled to pour out the soil in the left and right gaps of the pressure plate, thereby cleaning the soil on the pressure plate.

[0021] S3: The dust removal mechanism can scrape the soil at the foundation to be tested flat. The specific steps are: controlling the seventh motor to realize the rotation of the third telescopic cylinder, so that the scraper is vertically downward, and the scraper is lowered to the foundation to be tested by the second telescopic cylinder, and the first motor drives the first threaded rod to realize the movement of the dust removal mechanism, and the scraper is used to scrape the soil at the foundation to be tested flat, so as to facilitate the placement of the pressure plate. The gripping mechanism can be used to store the pressure plate, the first telescopic cylinder is rotated to a vertical state, and the U-shaped clamp is used to clamp and store the pressure plate.

[0022] Beneficial effects of the present invention:

[0023] 1. The present invention is provided with a lifting platform, and the height of the lifting platform can be adjusted by a ground anchor. The ground anchor includes a second threaded rod, and the upper circular ring on the ground anchor is moved by the meshing transmission of the second gear and the first gear. The upper circular ring is detachably connected to the lifting platform, and the lifting platform can be automatically raised. During the lifting process, the upper circular ring moves upward synchronously with the lifting platform, which can ensure that the second gear and the first gear are always in a meshing state, so that the height of the lifting platform can be adjusted easily.

[0024] 2. Grabbing mechanism and dust removal mechanism. The grabbing mechanism is used to grab or clamp and store the pressure plate. When the two U-shaped clamps on the grabbing mechanism rotate, one of them can grab the concrete test block and use the U-shaped clamp to neatly stack the concrete test block on the steel platform, which is suitable for load tests in narrow spaces. The other can clamp the pressure plate and change the height of the two U-shaped clamps by controlling the length change of the first telescopic cylinder to achieve the clamping and height change of the pressure plate. At the same time, the U-shaped clamp on the grabbing mechanism can also be turned over. When the U-shaped clamp is turned over, the soil in the gap on the pressure plate will be poured out. At the same time, the grabbing mechanism can also cooperate with the dust removal mechanism to place the pressure plate on the bearing platform of the dust removal mechanism. The rotation of the bearing platform can realize the change of the orientation of the pressure plate. The pressure plate after the orientation change is grabbed by the grabbing mechanism again, and the U-shaped clamp is turned over again to pour out the soil in the other two gaps.

[0025] 3. The bearing platform on the dust removal mechanism can also be flipped in the vertical direction. When the blade on the bearing platform is flipped upward, the pressure plate on the grabbing mechanism and the movement of the bearing platform can be used to scrape off the soil on the upper and lower surfaces of the pressure plate. The U-shaped clamp can be used to scrape off the soil on the surface of the upper and lower plates of the bearing platform to clean the pressure plate. When the scraper on the bearing platform is rotated vertically downward, it can be used in conjunction with the bearing platform to level the foundation to be tested, thereby ensuring the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a front view of the overall structure of the present invention;

[0028] Figure 2 The overall structure of the present invention is shown in FIG. Figure Ⅰ (First person perspective);

[0029] Figure 3 The overall structure of the present invention is shown in FIG. Figure II (Second perspective);

[0030] Figure 4 It is an enlarged schematic diagram of the structure of part A of the present invention;

[0031] Figure 5 It is an enlarged schematic diagram of the structure of part B of the present invention;

[0032] Figure 6 The overall structure of the present invention is shown in FIG. Figure III (Third person perspective);

[0033] Figure 7 is a rear elevation view of the lifting plate of the present invention;

[0034] Figure 8 The overall structure of the dust removal mechanism of the present invention is shown in FIG. Figure Ⅰ (First person perspective);

[0035] Fig. 9 The overall structure of the dust removal mechanism of the present invention is shown in FIG. Figure II (Second perspective);

[0036] Fig.10 It is a schematic diagram of the overall structure of the pressure bearing plate of the present invention;

[0037] Fig.11 It is a front view of the pressure plate structure of the present invention.

[0038] 1. Lifting platform; 2. Pressure plate; 3. Ground anchor; 4. Steel platform; 5. Grasping mechanism; 6. Dust removal mechanism; 7. Jack; 101. Lifting plate; 102. Mounting hole; 103. Mounting block; 104. First threaded rod; 105. First limit rod; 201. Upper plate; 202. Lower plate; 203. Upper steel bar; 204. Lower steel bar; 301. Fixed anchor; 302. Round stopper; 303. Lower circular ring; 304. Second threaded rod; 305. Second limit rod; 306. Upper circular ring; 307. First gear; 308. First pulley; 309. Connecting shaft; 310. Second gear; 311. First synchronous belt; 312. Second pulley; 313. Third pulley; 314. Second motor mounting plate; 315. 5. The second motor; 501. The threaded groove; 502. The third threaded rod; 503. The moving groove; 504. The fourth threaded rod; 505. The clamping block; 506. The moving part; 507. The rotating block; 508. The first telescopic cylinder; 509. The rectangular block; 510. The cylindrical shaft; 511. The fifth motor; 512. The U-shaped clamp; 513. The tenth motor; 601. The rectangular part; 602. The second telescopic cylinder; 603. The telescopic rod; 604. The U-shaped plate; 605. The bending back plate; 606. The third telescopic cylinder; 607. The first synchronous wheel; 608. The second synchronous wheel; 609. The second synchronous belt; 610. The seventh motor; 611. The bearing platform; 612. The knife edge; 613. The connecting block; 614. The eighth motor; 615. The scraper. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0040] like Fig.10 and Fig.11 As shown, a micro-modified flat plate load test pressure plate in a narrow space includes an upper plate 201, a lower plate 202, an upper steel bar 203 and a lower steel bar 204. The upper plate 201 is located at the upper end of the lower plate 202. The upper steel bar 203 is provided with two pieces, and a straight groove is opened in the middle of one of the upper steel bars 203, and the straight groove separates the upper steel bar 203 into two identical steel bars, and the straight groove cooperates with and clamps with the other upper steel bar 203 to form a cross-shaped steel bar, and the two sides of the cross-shaped steel bar are welded to the surface of the upper plate 201 and the surface of the lower plate 202 respectively.

[0041] The lower steel bars 204 are provided with four pieces, one side of the four lower steel bars 204 is respectively welded to the four diagonal surfaces of the lower plate 202, and the four lower steel bars 204 cooperate with each other to form an X-shaped steel bar, and the side of the X-shaped steel bar away from the lower plate 202 is fixedly welded to a surface of the upper plate 201. Therefore, the pressure plate device formed by welding the upper plate 201, the lower plate 202 and the cross-shaped steel bar can play an effective and stable load effect, and increase the rigidity of the pressure plate with a relatively small investment cost, and the effect is more obvious, thereby effectively solving the problem of easy deformation of the pressure plate.

[0042] At the same time, the solution of the present application also provides a micro-modified flat plate load test device in a small space, such as Figure 1 As shown, it includes a lifting platform 1, a pressure plate 2, a ground anchor 3, a steel platform 4, a grabbing mechanism 5, a dust removal mechanism 6 and a jack 7, wherein the ground anchor 3 is installed at the four corners of the lifting platform 1, and is used to adjust the height of the lifting platform 1 and fix the lifting platform 1, the pressure plate 2 is placed on the pile to be tested, the steel platform 4 is placed above the pressure plate 2, the jack 7 is installed between the steel platform 4 and the pressure plate 2, and a grabbing mechanism 5 is provided on the back of the lifting platform 1, the grabbing mechanism 5 is used to grab the test concrete test block, grab the pressure plate 2 and flip the pressure plate 2, and the dust removal mechanism 6 is installed on the side of the lifting platform 1, and is used to scrape the soil on the pressure plate 2 and level the foundation to be tested.

[0043] like Figure 2As shown, the lifting platform 1 includes a lifting plate 101, and mounting holes 102 are provided at the four corners of the lifting plate 101. Ground anchors 3 are installed in the mounting holes 102. Two mounting blocks 103 are also fixedly provided on the side of the lifting plate 101. A first threaded rod 104 is rotatably provided between the two mounting blocks 103, and a first limiting rod 105 is fixedly provided. One end of the first threaded rod 104 is connected to a first motor. A dust removal mechanism 6 is threadedly fitted on the first threaded rod 104. The dust removal mechanism 6 is slidably connected to the first limiting rod 105. The first motor drives the first threaded rod 104 to rotate, thereby further realizing the dust removal mechanism 6 to move back and forth on the first limiting rod 105.

[0044] like Figure 3 As shown, the ground anchor 3 includes a fixing anchor 301, the top of which is detachably connected with a circular stopper 302, the fixing anchor 301 is slidably connected to the mounting hole 102, and the circular stopper 302 is located above the mounting hole 102, wherein the fixing anchor 301 is detachably connected to the circular stopper 302 by threaded connection, clamping, hooking, etc., a lower circular ring member 303 is fixedly provided on the fixing anchor 301, a second threaded rod 304 is threadedly matched on the lower circular ring member 303, a second limiting rod 305 is fixedly and slidably provided on the lower circular ring member 303, an upper circular ring member 306 is fixedly provided on the top of the second limiting rod 305, the upper circular ring member 306 is slidably connected to the fixing anchor 301, and the second threaded rod 304 is rotatably connected to the upper circular ring member 306, the upper circular ring member 306 is detachably connected to the lifting plate 101, and the detachable connection method is clamping, magnetic attraction, etc.

[0045] like Figure 4 As shown, a first gear 307 is fixedly disposed at the rotational connection between the second threaded rod 304 and the upper circular ring member 306, and a first pulley 308 is also rotatably disposed on the bottom surface of the lifting plate 101. A connecting shaft 309 is fixedly disposed on the first pulley 308, and a second gear 310 is fixedly disposed on the connecting shaft 309. The second gear 310 is meshed with the first gear 307 for transmission, as shown in FIG. Figure 7As shown, second pulleys 312 are rotatably provided at the four corners of the back side of the lifting plate 101, and third pulleys 313 are also rotatably provided at both ends of the lifting plate 101. In this embodiment, the number of first pulleys 308 is four, which are respectively arranged beside the four mounting holes 102, the number of second pulleys 312 is four and are respectively arranged at the four corners of the lifting plate 101, the number of third pulleys 313 is two and are respectively arranged at both ends of the lifting plate 101, and the spacing between the two third pulleys 313 is smaller than the spacing between the first pulleys 308 at both ends. The four first pulleys 308, the four second pulleys 312 and the two third pulleys 313 are connected by a first synchronous belt 311, one of the second pulleys 312 is connected to a second motor 315, and the second motor 315 is fixed to the lifting plate 101 through a second motor mounting plate 314, and the first pulley 308 is driven by the second motor 315 The pulley 308, the second pulley 312 and the third pulley 313 rotate synchronously, and the second motor 315 drives one of the second pulleys 312 to rotate, further driving the first pulley 308 to rotate, and the second gear 310 rotates synchronously with the first pulley 308. The second gear 310 engages with the first gear 307 to realize the rotation of the second threaded rod 304. While the second threaded rod 304 rotates, it will also move upward relative to the lower circular ring member 303, and the second limiting rod 305 slides upward, and the upper circular ring member 306 fixedly connected to the second limiting rod 305 and the second threaded rod 304 moves upward synchronously therewith. Since the upper circular ring member 306 and the lifting plate 101 are detachably connected, when the upper circular ring member 306 moves upward, the lifting plate 101 moves upward synchronously therewith, the lifting plate 101 is pushed upward, and the height of the lifting plate 101 is changed.

[0046] like Figure 3 As shown, the grabbing mechanism 5 includes two symmetrically arranged thread grooves 501 on the back of the lifting plate 101, and a clamping block 505 is further provided on the lifting plate 101 at the two thread grooves 501, and the clamping block 505 plays a clamping role. A third threaded rod 502 is rotatably provided in the two thread grooves 501, and a moving groove 503 is threadedly matched on the third threaded rod 502, and the moving groove 503 is slidably connected with the thread groove 501. A fourth threaded rod 504 is rotatably provided in the moving groove 503, and a moving member 506 is threadedly matched on the fourth threaded rod 504, and the moving member 506 is slidably connected with the moving groove 503. The third threaded rod 502 is driven by a third motor, and the fourth threaded rod 504 is driven by a fourth motor. A rotating block 507 is rotatably provided on the moving member 506, and a tenth motor 513 is fixedly provided at the rotation connection between the rotating block 507 and the moving member 506. The tenth motor 513 is fixedly connected to the moving member 506 and rotates synchronously. A first telescopic cylinder 508 is fixedly provided on the rotating block 507, as shown in FIG. Figure 5As shown, a rectangular block 509 is fixedly provided at the output end of the first telescopic cylinder 508, a cylindrical shaft 510 is rotatably provided on the rectangular block 509, a fifth motor 511 is connected to the cylindrical shaft 510, the fifth motor 511 is fixedly connected to the rectangular block 509, a U-shaped clamp 512 is fixedly connected to one end of the cylindrical shaft 510, in this embodiment, there are two U-shaped clamps 512, both are symmetrically arranged, the driving structures of the two U-shaped clamps 512 are consistent, when the rotating block 507 rotates, the first telescopic cylinder 508 rotates, realizing the circular motion of the U-shaped clamp 512, the first telescopic cylinder 508 changes the position of the U-shaped clamp 512, and the cylindrical shaft 510 realizes the rotation of the U-shaped clamp 512.

[0047] When the U-shaped clip 512 is not in use, the tenth motor 513 can be used to rotate and maintain a suitable angle, and the fourth threaded rod 504 and the third threaded rod 502 can be rotated to achieve synchronous movement of the positions of the two U-shaped clips 512.

[0048] like Figure 8 and Fig. 9 As shown, the dust removal mechanism 6 includes a rectangular member 601, which is threadedly connected to the first threaded rod 104 and slidably connected to the first limit rod 105. The first motor drives the rectangular member 601 to slide on the first limit rod 105. The second telescopic cylinder 602 and the telescopic rod 603 are fixedly provided on the rectangular member 601. The output end of the second telescopic cylinder 602 and the extended end of the telescopic rod 603 are fixedly provided with a U-shaped plate 604. A bending back plate 605 is fixedly provided on the U-shaped plate 604. A first synchronous wheel 607 and a second synchronous wheel 608 are rotatably provided on the bending back plate 605. The first synchronous wheel 607 and the second synchronous wheel 608 are connected by a second synchronous belt 609. A seventh motor 610 is connected, and the seventh motor 610 is fixedly connected to the bending back plate 605. The seventh motor 610 drives the second synchronous wheel 608 to rotate, and further realizes the rotation of the first synchronous wheel 607. The bending back plate 605 is also rotatably provided with a third telescopic cylinder 606, and the third telescopic cylinder 606 is fixedly connected to the first synchronous wheel 607 and rotates coaxially. A connecting block 613 is fixedly provided at the output end of the third telescopic cylinder 606, and a bearing platform 611 is rotatably provided on the connecting block 613. An eighth motor 614 is fixedly provided on the connecting block 613, and the eighth motor 614 drives the bearing platform 611 to rotate. A knife edge 612 is provided on one side of the bearing platform 611, and a scraper 615 is provided on the other side of the bearing platform 611.

[0049] A test method for a micro-modified flat plate load test device in a narrow space, comprising the following steps:

[0050] S1: When in use, first install the pressure plate 2 on the pile head to be tested, and install the steel platform 4 above the pressure plate 2, and install the jack 7 between the pressure plate 2 and the steel platform 4, and finally neatly stack the concrete test blocks on the steel platform 4 to carry out the flat plate load test. Before the test starts, fix the four anchors 3 around the foundation to be tested, and install the lifting platform 1 on the anchors 3. Drive the second gear 310 to rotate through the second motor 315, and the second gear 310 and the first gear 307 are meshed and transmitted to realize the rotation and upward movement of the second threaded rod 304, and further realize the upward movement of the upper circular ring 306. Since the upper circular ring 306 and the lifting plate 101 are detachably connected, that is, the lifting plate 101 moves upward synchronously with the upper circular ring 306, and the lifting plate 101 is lifted to a suitable height, which is convenient for the grabbing mechanism 5 on the lifting plate 101 to grab the concrete test block;

[0051] The specific grasping steps are as follows: the third motor drives the third threaded rod 502 to rotate and the fourth motor drives the fourth threaded rod 504 to rotate, so as to realize the movement of the moving member 506, and then cooperates with the tenth motor 513 to drive the two U-shaped clips 512 to rotate, and finally realizes the clamping function of the U-shaped clip 512 and the position change of the U-shaped clip 512. The relative rotation of the two U-shaped clips 512 can realize the grasping of the concrete test block, and then the position change of the U-shaped clip 512 is realized by the rotation of the third threaded rod 502 and the fourth threaded rod 504. The U-shaped clip 512 first grasps the concrete test block, and then moves with the concrete test block, so as to realize the neat stacking of the concrete test block on the steel platform 4 for load test;

[0052] S2: The gripping mechanism 5 cooperates with the dust removal mechanism 6 to realize the dust removal operation of the pressure plate 2. The specific steps are: after the gripping mechanism 5 is used to clamp the pressure plate 2, the third telescopic cylinder 606 is rotated by the seventh motor 610, and the supporting platform 611 is flipped to a vertical state. At this time, the blade 612 on the supporting platform 611 is facing the lower plate 202 of the pressure plate 2, and the second telescopic cylinder 602 is used to make the blade 612 contact with the lower plate 202 of the pressure plate 2, and the first threaded rod 104 is driven by the first motor to realize the movement of the dust removal mechanism 6. During the movement, the blade 612 can scrape off the soil on the lower plate 202. After the soil on the lower plate 202 is scraped off, the blade 612 is retracted, and the fifth motor 511 on the gripping mechanism 5 is controlled to rotate the U-shaped clamp 512. The two U-shaped The rotation of the clamp 512 will flip the pressure plate 2 clamped thereon, flip it to the upper plate 201 facing downward, and repeat the above steps, use the knife edge 612 to scrape the soil on the upper plate 201. During the reversal of the pressure plate 2, the soil in the front and rear gaps between the upper steel bar 203 and the lower steel bar 204 of the pressure plate 2 will be poured out, and the bearing platform 611 on the grasping mechanism 5 is controlled to be in a horizontal state, and the pressure plate 2 is placed on the bearing platform 611 through the cooperation of the grasping mechanism 5, and the bearing platform 611 is rotated 90° by the eighth motor 614, and then clamped by the grasping mechanism 5, so that the gaps on the left and right positions of the pressure plate 2 can be flipped to the front and rear positions, and the grasping mechanism 5 is controlled to pour out the soil in the left and right gaps of the pressure plate 2, so as to clean the soil on the pressure plate 2;

[0053] S3: The dust removal mechanism 6 can also scrape the soil at the foundation to be tested flat. The specific steps are: controlling the seventh motor 610 to realize the rotation of the third telescopic cylinder 606, so that the scraper 615 is vertically downward, and the scraper 615 is lowered to the foundation to be tested by the second telescopic cylinder 602, and the first threaded rod 104 is driven by the first motor to realize the movement of the dust removal mechanism 6, and the scraper 615 is used to scrape the soil at the foundation to be tested flat, so as to facilitate the placement of the pressure plate 2. The grasping mechanism 5 can also be used to store the pressure plate 2, the first telescopic cylinder 508 is rotated to a vertical state, and the U-shaped clamp 512 is used to clamp and store the pressure plate 2.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. Micro-modification of the flat plate load test device in a narrow space, characterized in that: It comprises a lifting platform (1), a ground anchor (3), a steel platform (4), a grabbing mechanism (5), a dust removal mechanism (6) and a jack (7); The lifting platform (1) comprises a lifting plate (101), ground anchors (3) are installed at the four corners of the lifting plate (101), a dust removal mechanism (6) is slidably provided on the side of the lifting plate (101), the ground anchor (3) comprises a fixed anchor (301), the fixed anchor (301) is slidably connected to the lifting plate (101), a lower circular ring (303) is fixedly provided on the fixed anchor (301), a second threaded rod (304) is threadedly matched on the lower circular ring (303), a second limiting rod (305) is fixedly and slidably provided on the lower circular ring (303), and the second limiting rod (305) is fixedly and slidably provided on the lower circular ring (303). An upper circular ring member (306) is fixedly provided at the top of the lifting plate (101), the upper circular ring member (306) is slidably connected to the fixing anchor (301), the upper circular ring member (306) is detachably connected to the lifting plate (101), and the second threaded rod (304) is rotatably connected to the upper circular ring member (306), a first gear (307) is fixedly provided at the rotatable connection between the second threaded rod (304) and the upper circular ring member (306), a second gear (310) is rotatably provided on the bottom surface of the lifting plate (101), and the second gear (310) is meshed with the first gear (307); The grabbing mechanism (5) comprises two movable grooves (503) slidably provided on the back side of the lifting plate (101), movable members (506) are slidably provided on the two movable grooves (503), rotating blocks (507) are rotatably provided on the two movable members (506), a tenth motor (513) is fixedly provided at the rotational connection between the two rotating blocks (507) and the two movable members (506), a first telescopic cylinder (508) is fixedly provided on the two rotating blocks (507), a rectangular block (509) is fixedly provided at the output end of the first telescopic cylinder (508), a cylindrical shaft (510) is rotatably provided on the two rectangular blocks (509), and one end of the two cylindrical shafts (510) is fixedly connected with a U-shaped clamp (512); The dust removal mechanism (6) is slidably arranged on the side of the lifting platform (1), and comprises a rectangular member (601), a U-shaped plate (604) is slidably arranged on the rectangular member (601), a bending back plate (605) is fixedly arranged on the U-shaped plate (604), a third telescopic cylinder (606) is rotatably arranged on the bending back plate (605), a connecting block (613) is fixedly arranged at the output end of the third telescopic cylinder (606), a bearing platform (611) is rotatably arranged on the connecting block (613), a knife edge (612) is arranged on one side of the bearing platform (611), and a scraper (615) is arranged on the other side of the bearing platform (611).

2. The micro-modified flat plate load test device in a narrow space according to claim 1 is characterized in that: The jack (7) is installed below the steel platform (4), a grabbing mechanism (5) is provided on the back of the lifting platform (1), and a dust removal mechanism (6) is installed on the side of the lifting platform (1). The four corners of the lifting plate (101) are provided with mounting holes (102), and ground anchors (3) are installed in the mounting holes (102).

3. The micro-modified flat plate load test device in a narrow space according to claim 2, characterized in that: Two mounting blocks (103) are fixedly provided on the side of the lifting plate (101); a first threaded rod (104) is rotatably provided between the two mounting blocks (103); a first limiting rod (105) is fixedly provided; one end of the first threaded rod (104) is connected to a first motor; the first threaded rod (104) is threadably matched with a dust removal mechanism (6); the dust removal mechanism (6) is slidably connected to the first limiting rod (105); and the first motor drives the first threaded rod (104) to rotate.

4. The micro-modified flat plate load test device in a narrow space according to claim 3, characterized in that: The top end of the fixing anchor (301) is detachably connected to a circular stopper (302), the fixing anchor (301) is slidably connected to the mounting hole (102), and the circular stopper (302) is located above the mounting hole (102), wherein the fixing anchor (301) and the circular stopper (302) are detachably connected by threaded connection, clamping connection or hooking connection, and the upper circular ring (306) and the lifting plate (101) are detachably connected by clamping connection or magnetic attraction.

5. The micro-modified flat plate load test device in a narrow space according to claim 4, characterized in that: A first gear (307) is fixedly provided at the rotatable connection between the second threaded rod (304) and the upper circular ring member (306); a first pulley (308) is also rotatably provided on the bottom surface of the lifting plate (101); a connecting shaft (309) is fixedly provided on the first pulley (308); a second gear (310) is fixedly provided on the connecting shaft (309); the second gear (310) is meshed with the first gear (307) for transmission; second pulleys (312) are rotatably provided at the four corners of the back side of the lifting plate (101); third pulleys (313) are also rotatably provided at both ends of the lifting plate (101); there are four first pulleys (308), which are respectively provided at the four mounting holes (1 02), there are four second pulleys (312) respectively arranged at the four corners of the lifting plate (101), there are two third pulleys (313) respectively arranged at the two ends of the lifting plate (101), the spacing between the two third pulleys (313) is smaller than the spacing between the first pulleys (308) at the two ends, the four first pulleys (308), the four second pulleys (312) and the two third pulleys (313) are connected by a first synchronous belt (311), one of the second pulleys (312) is connected to a second motor (315), and the second motor (315) is fixed to the lifting plate (101) through a second motor mounting plate (314).

6. The micro-modified flat plate load test device in a narrow space and the test method thereof according to claim 5 are characterized in that: The gripping mechanism (5) comprises two symmetrically arranged thread grooves (501) on the back side of the lifting plate (101); a clamping block (505) is further arranged on the lifting plate (101) at the two thread grooves (501); a third threaded rod (502) is rotatably arranged in the two thread grooves (501); a movable groove (503) is threadedly matched on the third threaded rod (502); the movable groove (503) is slidably connected to the thread groove (501); a fourth threaded rod (504) is rotatably arranged in the movable groove (503); a movable member (506) is threadedly matched on the fourth threaded rod (504); the movable member (506) is slidably connected to the movable groove (503); the third threaded rod (502) is driven by a third motor; and the fourth threaded rod (504) is driven by a fourth motor.

7. The micro-modified flat plate load test device in a narrow space according to claim 6, characterized in that: The tenth motor (513) is fixedly connected to the moving member (506) and rotates synchronously. The cylindrical shaft (510) is connected to the fifth motor (511), and the fifth motor (511) is fixedly connected to the rectangular block (509). The number of the clips (512) is two and they are symmetrically arranged.

8. The micro-modified flat plate load test device in a narrow space according to claim 7, characterized in that: The rectangular member (601) is threadedly connected to the first threaded rod (104) and is slidably connected to the first limit rod (105). The first motor drives the rectangular member (601) to slide on the first limit rod (105). The second telescopic cylinder (602) and the telescopic rod (603) are fixedly provided on the rectangular member (601). The output end of the second telescopic cylinder (602) and the extended end of the telescopic rod (603) are fixedly provided with a U-shaped plate (604). The U-shaped plate (604) is fixedly provided with a bending back plate (605). The bending back plate (605) is rotatably provided with a first synchronous wheel (607) and a second synchronous wheel (608). The first synchronous wheel (607) and the second synchronous wheel (608) are connected via a second synchronous belt (609). The second synchronous wheel (608) is connected with a seventh motor (610). The seventh motor (610) is fixedly connected to the bending back plate (605).

9. The micro-modified flat plate load test device in a narrow space according to claim 8, characterized in that: The third telescopic cylinder (606) is fixedly connected to the first synchronous wheel (607) and rotates coaxially. An eighth motor (614) is fixedly provided on the connecting block (613), and the eighth motor (614) drives the bearing platform (611) to rotate.

10. The test method of the test device according to claim 9, characterized in that: The following steps are involved: S1: When in use, firstly, the pressure plate (2) is installed on the pile head to be tested, and the steel platform (4) is installed above the pressure plate (2), and the jack (7) is installed between the pressure plate (2) and the steel platform (4). Finally, the concrete test blocks are neatly stacked on the steel platform (4) to carry out the flat plate load test. Before the test starts, four anchors (3) are fixed around the foundation to be tested, and the lifting platform (1) is installed on the anchors (3). The second gear (310) is driven by the second motor (315). The second gear (310) and the first gear (307) are meshed and driven to realize the rotation and upward movement of the second threaded rod (304), and further realize the upward movement of the upper circular ring (306). Since the upper circular ring (306) and the lifting plate (101) are detachably connected, the lifting plate (101) moves upward synchronously with the upper circular ring (306), and the lifting plate (101) is lifted to a suitable height, so that the grabbing mechanism (5) on the lifting plate (101) can grab the concrete test block. The specific grasping steps are as follows: the third motor drives the third threaded rod (502) to rotate and the fourth motor drives the fourth threaded rod (504) to rotate, so as to realize the movement of the moving part (506), and then cooperates with the tenth motor (513) to drive the two U-shaped clips (512) to rotate, so as to finally realize the clamping function of the U-shaped clip (512) and the position change of the U-shaped clip (512), and the relative rotation of the two U-shaped clips (512) can realize the grasping of the concrete test block, and then the position change of the U-shaped clip (512) is realized by the rotation of the third threaded rod (502) and the fourth threaded rod (504), and the U-shaped clip (512) first grasps the concrete test block, and then moves with the concrete test block, so as to realize the neat stacking of the concrete test block on the steel platform (4) and carry out the load test; S2: The gripping mechanism (5) cooperates with the dust removal mechanism (6) to realize the dust removal operation of the pressure plate (2). The specific steps are: after the pressure plate (2) is clamped by the gripping mechanism (5), the third telescopic cylinder (606) is rotated by the seventh motor (610), and the bearing platform (611) is flipped to a vertical state. At this time, the blade (612) on the bearing platform (611) is facing the lower plate (202) of the pressure plate (2), and the second telescopic cylinder (606) is used to rotate. 02) so that the blade (612) contacts the lower plate (202) of the pressure plate (2), and the first motor drives the first threaded rod (104) to realize the movement of the dust removal mechanism (6). During the movement, the blade (612) can scrape the dirt on the lower plate (202). After the dirt on the lower plate (202) is scraped off, the blade (612) is retracted, and the fifth motor (511) on the grasping mechanism (5) is controlled to rotate the U-shaped clamp (512). The U-shaped clamp (512) rotates to flip the pressure plate (2) held thereon, so that the upper plate (201) faces downward, and the above steps are repeated to scrape the dirt on the upper plate (201) with the blade (612). During the reversal of the pressure plate (2), the dirt in the front and rear gaps between the upper steel bar (203) and the lower steel bar (204) of the pressure plate (2) will be dumped out, and the support platform (611) on the gripping mechanism (5) is controlled to be in a The pressure plate (2) is placed in a horizontal state, and the pressure plate (2) is placed on the bearing platform (611) by the cooperation of the grasping mechanism (5), and the bearing platform (611) is rotated (90) degrees by the eighth motor (614), and then the grasping mechanism (5) is cooperated to clamp it, so that the gaps at the left and right positions on the pressure plate (2) can be turned to the front and back positions, and the grasping mechanism (5) is controlled to pour out the soil at the left and right gaps of the pressure plate (2), so as to realize the cleaning of the soil on the pressure plate (2); S3: The dust removal mechanism (6) can scrape the soil at the foundation to be tested flat. The specific steps are: controlling the seventh motor (610) to realize the rotation of the third telescopic cylinder (606), so that the scraper (615) is vertically downward, and the scraper (615) is lowered to the foundation to be tested by the second telescopic cylinder (602), and the first motor drives the first threaded rod (104) to realize the movement of the dust removal mechanism (6), and the scraper (615) is used to scrape the soil at the foundation to be tested flat, so as to facilitate the placement of the pressure plate (2), and the gripping mechanism (5) can be used to store the pressure plate (2), the first telescopic cylinder (508) is rotated to a vertical state, and the U-shaped clamp (512) is used to clamp and store the pressure plate (2).

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