CN115559362A - Vertical uplift resistance testing platform for engineering pile - Google Patents

Abstract

The invention discloses a vertical uplift capacity test platform for an engineering pile, and particularly relates to the related technical field of uplift capacity test of the engineering pile. According to the vertical uplift resistance testing platform for the engineering pile, the balance column and the rotating rod are arranged, so that the load bearing plate can be kept horizontal by inserting the balance column into soil, the ground is not required to be processed flatly, and the phenomenon that a hydraulic jack turns over during working and damages surrounding people is avoided.

Description

Vertical uplift resistance testing platform for engineering pile

Technical Field

The invention relates to the technical field related to engineering pile uplift resistance testing, in particular to a vertical uplift resistance testing platform for an engineering pile.

Background

The engineering pile is a pile used in engineering and finally stressed to play a role in construction and construction, can be divided into a large-diameter pile, a medium-diameter pile and a small-diameter pile according to the diameter of the pile, can be divided into a concrete pile, a wood pile, a steel pile, a composite pile and the like according to pile body materials, and can be divided into the following steps according to different pile forming methods: the engineering pile can be suitable for different types of building foundations according to classification.

The vertical uplift test of the engineering pile is to form a detection loading system by adopting corresponding loading equipment and a counter-force support, so that the uplift resistance of the pile body is tested, but the existing test platform still has the following defects:

1. the hydraulic jack used for providing the counterforce needs to be placed on a horizontal load bearing plate or a counterforce pile to prevent the hydraulic jack and the steel beam from turning over laterally to harm surrounding people, so that the contact surface needs to be processed smoothly before each detection, the working strength is high, and the working efficiency is low;

2. the engineering pile is stressed by welding a plurality of steel bars on the steel beam, but when the steel bars are welded, the welding positions of all the steel bars are different, so that the stress of part of the steel bars is uneven, errors exist in the test, and the steel bars and the steel beam are difficult to separate afterwards, so that the test cost is improved.

Disclosure of Invention

The invention mainly aims to provide a vertical uplift resistance testing platform for an engineering pile, which can effectively solve the problems of low ground processing working efficiency and inaccurate data caused by uneven stress of reinforcing steel bars.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a vertical resistance to plucking ability test platform for engineering stake, includes two lotus support plates, two the upper end of lotus support plate all is equipped with hydraulic jack, two hydraulic jack's upper portion is equipped with the girder steel jointly, the upper end middle part of girder steel is equipped with the U type balancing piece that is used for fixed engineering stake reinforcing bar, the lower extreme four corners of lotus support plate all is equipped with the balancing post, just the upper portion of balancing post is cylindrical, the lower part is for losing most advanced toper, the spout has been seted up to the lower extreme of balancing post, the inside of spout is equipped with the slide bar, the lower extreme of slide bar is equipped with the toper stick that is used for accelerating the inside speed in entering soil, just the maximum diameter of toper stick equals the minimum external diameter of balancing post, the upper end of slide bar is equipped with the connecting rod that extends to the inside of balancing post, the upper end of connecting rod is equipped with dwang one, the upper end of dwang one passes the upper end of lotus support plate and is equipped with the rotary disk that conveniently controls the toper stick and rotate and move down, the surface upper portion of dwang one is equipped with the screw thread strip, the inside upside of lotus support plate has been seted up, the thread groove of lotus support plate, the thread connection together.

Preferably, the outer surfaces of the four balancing columns are all provided with equal-height scale marks.

Preferably, the inside of lotus support plate is seted up and is linked together with the thread groove and is located the first dead slot under the thread groove, the length of first dead slot is greater than the length of thread groove, four arc walls have evenly been seted up in the lower extreme outside of dwang one, the mounting groove has been seted up to the inside of balancing post, the surface upper portion of connecting rod is equipped with the go-between that equals with dwang one external diameter, the upper end of go-between evenly is equipped with four respectively sliding connection and is located the arc limiting plate with four arc wall insides with one side, the lower extreme of go-between is equipped with the bevel gear one that is located the mounting groove inside, the surface lower part of bevel gear one evenly meshes has four bevel gear two, four open slots that do not communicate with each other with the mounting groove are evenly seted up to the surface lower part of balancing post, four the inside of open slot all is equipped with the sector plate that is used for increasing balancing post and land area in order to avoid the lotus support plate to continuously move down at the during operation, four one side that is close to each other of sector plate all is equipped with the internal surface that runs through the mounting groove and difference fixed connection is located four bevel gear two threaded rod on four bevel gear.

Preferably, a part of the sector plate far away from the second bevel gear is of a conical structure.

Preferably, the front and rear outer end walls of the U-shaped balance block are respectively provided with a plurality of hoisting mechanisms, each hoisting mechanism consists of a fixed block fixedly connected to the vertical part of the U-shaped balance block and a combined cover plate movably connected to one end of the fixed block far away from the U-shaped balance block, one end, close to each other, of the fixed block and the combined cover plate is respectively provided with a semi-cylindrical groove and a semi-elliptical cylindrical groove which penetrate through the upper end and the lower end of the fixed block, and the middle lower part of the inner surface of each semi-elliptical cylindrical groove is uniformly provided with a plurality of triangular plates.

Preferably, one side edge of each of the far clutch cover plates of the triangular plate is of an arc-shaped structure.

Preferably, the shifting chute has been seted up to the internal surface lower part in half cylinder groove, the inside of shifting chute is equipped with the slider, a lateral wall that the slider is close to closing the apron evenly is equipped with three arc line stick one of laminating mutually with reinforcing bar surface texture, be equipped with powerful spring jointly between the lower extreme of slider and the diapire of shifting chute, the second slot has been seted up to one side that the separation and reunion apron is kept away from to shifting chute roof wall, the upper end of slider is equipped with the rack, the inside downside of second slot is equipped with rotor bar two, the surface both sides of rotor bar two are equipped with bevel gear six respectively and with rack toothing's straight-tooth gear, the roof of second slot is equipped with rotor bar one, the surface upper portion and the surface lower part of rotor bar one are equipped with respectively with bevel gear three and with bevel gear six meshing's bevel gear five, the roof of second slot is equipped with the locating plate, the one end that the locating plate is close to the apron is equipped with the screw rod, the one end that the separation and reunion apron is kept away to the screw rod runs through the locating plate and is equipped with bevel gear four with bevel gear three meshing, the inner surface that one side that the screw rod is close to the apron is equipped with the whetstone side that runs through half cylinder groove.

Preferably, an arc bar II which is used for extruding and fixing the reinforcing steel bars and has the same shape as the arc bar I and different size is arranged on one side wall of the baffle block close to the combined cover plate.

Preferably, the upper end of the load bearing plate is provided with two symmetrically arranged balance mechanisms, each balance mechanism comprises a support column and a telescopic column connected to the support column, the upper end of each telescopic column is provided with a U-shaped fixture block with an opening facing the steel beam, and the U-shaped fixture blocks are slidably connected to the front side and the rear side of the steel beam.

Preferably, the sum of the contracted heights of the supporting column and the telescopic column is equal to the initial height of the hydraulic jack.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the balance columns and the fan-shaped plates are arranged, so that the load-carrying plate can be inserted into soil through the balance columns, and then the load-carrying plate is kept horizontal through observing the scale marks, therefore, the ground is not required to be processed flatly, the working strength is reduced, the phenomenon that a hydraulic jack drives a steel beam to turn sideways when in work and harm surrounding people is avoided, in addition, after the balance columns are inserted into the soil, the rotating disc is pressed to enable the rotating disc to move downwards to be connected with the connecting ring, so that the connecting ring rotates along with the rotating bars one by one to control the fan-shaped plates to move outwards horizontally, the contact area of the balance columns and the soil is increased, and the stability of the test platform is further enhanced.

2. Through setting up U type balancing piece and hoisting machine structure isotructure, make the whetstone piece move down and continuous grow to the extrusion power of reinforcing bar along with the slider, until whetstone piece extrusion power is balanced with hoisting machine structure to the dynamics of drawing of reinforcing bar, thereby fix the reinforcing bar on the engineering pile on hoisting machine constructs, can also avoid hoisting machine to construct the too big reinforcing bar damage that leads to of extrusion power to the reinforcing bar, convenient disassembling afterwards simultaneously, reduce the test cost, it is inhomogeneous through the atress that leads to the reinforcing bar welding on the girder steel to reduce, ensure the accuracy of data.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of a load plate of the present invention;

FIG. 3 is a cross-sectional view of a balance post of the present invention;

FIG. 4 is another perspective depth cut-away view of FIG. 3;

FIG. 5 is a schematic view of the working state of FIG. 3;

FIG. 6 is a schematic view of a connection structure of a U-shaped balance block and a hoisting mechanism according to the present invention;

FIG. 7 is a schematic structural view of a fixing block according to the present invention;

FIG. 8 is a cross-sectional view of a mounting block of the present invention;

FIG. 9 is an enlarged view taken at A in FIG. 8;

fig. 10 is a schematic view of a connection structure of the balancing mechanism and the U-shaped latch according to the present invention.

In the figure: 1. a loading plate; 11. rotating the disc; 12. a thread groove; 13. a first empty groove; 2. a hydraulic jack; 3. a steel beam; 4. a balancing column; 40. mounting grooves; 41. scale lines; 42. rotating the first rod; 421. a connecting rod; 43. a threaded strip; 44. a connecting ring; 441. a first bevel gear; 442. a second bevel gear; 443. a threaded rod; 45. an arc limiting plate; 46. an open slot; 47. a sector plate; 48. a chute; 49. a slide bar; 491. a tapered rod; 5. a balancing mechanism; 51. a support pillar; 52. a telescopic column; 53. a U-shaped fixture block; 6. a U-shaped balance block; 60. a hoisting mechanism; 61. a fixed block; 611. a moving groove; 6111. a second empty groove; 6112. rotating the first rod; 6113. a third bevel gear; 6114. a fourth bevel gear; 6115. a fifth bevel gear; 612. a slider; 6121. a rack; 6122. rotating the second rod; 6123. a sixth bevel gear; 6124. a spur gear; 613. a first arc wire rod; 614. a strong spring; 615. a grinding block; 6151. a second arc bar; 616. positioning a plate; 62. closing the cover plate; 63. a semi-cylindrical groove; 64. a semi-elliptical cylindrical trough; 641. a triangular plate.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example one

As shown in fig. 1-5, the embodiment discloses a vertical uplift capacity test platform for an engineering pile, which includes two load bearing plates 1, hydraulic jacks 2 are respectively arranged at the upper ends of the two load bearing plates 1, a steel beam 3 is jointly arranged at the upper portions of the two hydraulic jacks 2, a U-shaped balance block 6 for fixing a steel bar on the engineering pile is arranged in the middle of the upper end of the steel beam 3, the load bearing plates 1 are horizontally placed on the ground through balance columns 4, then the steel beam 3 is lifted through the hydraulic jacks 2, and then the uplift test is performed on the engineering pile by using the U-shaped balance block 6 and the steel bar on the engineering pile;

in order to enable the four balance columns 4 to rapidly move downwards by the same height so as to keep the upper end face of the load carrying plate 1 horizontal, specifically, please refer to fig. 2-3, four corners of the lower end of the load carrying plate 1 are respectively provided with the balance columns 4, the upper parts of the balance columns 4 are cylindrical, and the lower parts of the balance columns 4 are conical without tips, so that the balance columns 4 can be placed on the ground when not working without being worn to cause damage, thereby prolonging the service life of the balance columns 4, and the outer surfaces of the four balance columns 4 are respectively provided with equal-height scale marks 41 for accurately judging the downward movement distance of the balance columns 4;

therefore, the balance columns 4 move downwards to penetrate into the soil by pressing the load bearing plate 1, and meanwhile the downward movement depth of each balance column 4 is judged by observing the scale marks 41, so that the upper end face of the load bearing plate 1 is kept horizontal, and the hydraulic jack 2 is prevented from toppling over during work.

Specifically, the lower end of the balance column 4 is provided with a chute 48, the chute 48 is located in a lower tapered part of the balance column 4 and is used for allowing a sliding rod 49 to slide up and down, the sliding rod 49 is arranged inside the chute 48, the lower end of the sliding rod 49 is provided with a tapered rod 491 for accelerating the speed of entering the ground, so that the soil is prevented from entering the chute 48 along with the downward movement of the tapered rod 491 and influencing the retraction of the sliding rod 49 and the tapered rod 491, the maximum diameter of the tapered rod 491 is equal to the minimum outer diameter of the balance column 4, namely when the tapered rod 491 moves down to the outside of the chute 48, the tapered rod 491 and the lower part of the balance column 4 just form a complete tapered structure, so that the resistance to the movement of the balance column 4 is reduced, the balance column 4 can conveniently move up and down in the soil, the upper end of the sliding rod 49 is provided with a connecting rod 421 extending to the inside of the balance column 4, the upper end of the connecting rod 421 is provided with a screw 42, the diameter of the rotating rod 42 is larger than that of the rotating rod 421, the upper end of the first 42 passes through the upper end of the load plate 1 and is provided with a screw thread 11 for conveniently controlling the tapered rod 491 to move down, the upper part of the first 42, the outer surface of the rotating plate is provided with a screw thread 43, the upper side of the screw thread groove 12 provided with the screw thread groove 12 connected in the load plate 12, and the load plate 12 connected to connect the load plate 1 in the load plate 1;

therefore, the rotating disc 11 is rotated on the upper side of the load bearing plate 1, the thread strip 43 rotates in the thread groove 12, so that the sliding rod 49 and the conical rod 491 move downwards in the sliding groove 48 until the conical rod 491 moves to the outer side of the sliding groove 48 to form a complete cone with the lower part of the balance column 4, the balance column 4 can be moved downwards to be inserted into the soil by pressing the load bearing plate 1 no matter the ground is flat, the upper end face of the load bearing plate 1 is kept horizontal, and the hydraulic jack 2 is prevented from toppling over during working.

In order to avoid that the load bearing plate 1 continuously moves downwards due to the reaction force when the hydraulic jack 2 works, further, referring to fig. 3-5, a first empty groove 13 which is communicated with the thread groove 12 and is positioned right below the thread groove 12 is formed in the load bearing plate 1, the length of the first empty groove 13 is larger than that of the thread groove 12, four arc-shaped grooves are uniformly formed in the outer side of the lower end of the rotating rod 42, so that the thread strip 43 can move downwards along with the rotating rod 42 to enter the first empty groove 13, and then the rotating rod 42 and the thread strip 43 are controlled to continuously move downwards, so that the arc-shaped limiting plate 45 is slidably inserted into the arc-shaped grooves;

the balance post 4 is internally provided with a mounting groove 40, the upper part of the outer surface of the connecting rod 421 is provided with a connecting ring 44 with the same outer diameter as the rotating rod 42, the connecting ring 44 is movably connected to an arc-shaped limiting plate 45, so that when the arc-shaped limiting plate 45 rotates along with the rotating rod 42 in the earlier stage, the connecting ring 44 is not driven to rotate together, the upper end of the connecting ring 44 is uniformly provided with four arc-shaped limiting plates 45 which are respectively and slidably connected to the four arc-shaped grooves on the same side, when the rotating rod 42 moves downwards to be in contact with the connecting ring 44, the arc-shaped limiting plate 45 is slidably inserted into the arc-shaped grooves, so that the connecting ring 44 rotates along with the rotating rod 42, the lower end of the connecting ring 44 is provided with a first bevel gear 441 positioned in the mounting groove 40, the lower part of the outer surface of the first bevel gear 441 is uniformly engaged with four second bevel gears 442, when the threaded strip 43 completely enters the first empty groove 13, the rotating disk 11 is pressed, the first bevel gear 42 moves downwards, and the first bevel gear 42 slightly rotates while moving, so that the rotating rod 45 conveniently enters the arc-shaped limiting plate 45 into the arc-shaped grooves, and the first bevel gear 42 is connected into a whole body 44, so that the connecting ring 44 drives the connecting ring 44 to rotate along with the first bevel gear 441;

four open grooves 46 which are not communicated with the mounting groove 40 are uniformly formed in the lower portion of the outer surface of the balance column 4, so that soil is prevented from entering the mounting groove 40 along with the fan-shaped plates 47, subsequent rotation of the bevel gear I441 and the bevel gear II 442 is affected, the fan-shaped plates 47 which are used for increasing the contact area of the balance column 4 and the soil are arranged in the four open grooves 46, so that the load-carrying plate 1 is prevented from continuously moving downwards during working, threaded rods 443 which penetrate through the inner surface of the mounting groove 40 and are fixedly connected to the four bevel gear II 442 on the same side are arranged on the mutually close sides of the four fan-shaped plates 47, the rotating rods I42 drive the four meshed bevel gear II 442 to rotate through the control connecting ring 44 and the bevel gear I441, so that the threaded rods 443 rotate, the fan-shaped plates 47 which are in threaded connection with the threaded rods 443 horizontally move outwards and are inserted into the soil, so that the contact area of the balance column 4 and the soil are increased, the downward movement distance of the load-carrying plate 1 during working is reduced, and the stability of the testing platform is maintained.

In addition, in the present embodiment, a part of the sector plate 47 away from the bevel gear pair 442 is provided with a conical structure to reduce resistance when the sector plate 47 moves, and when a small piece of stone is encountered, the tip of the sector plate 47 can be used to push the stone to the upper side or the lower side thereof, so as to reduce the influence of the stone encountered by one of the sector plates 47 on the remaining sector plates 47 moving.

Therefore, the specific implementation manner of this embodiment is:

firstly, the rotating disc 11 is rotated, the threaded bar 43 and the threaded groove 12 are used for controlling the tapered rod 491 to move downwards to the outer side of the sliding groove 48, then the load bearing plate 1 is pressed to enable the balance columns 4 to be inserted into soil, meanwhile, the scale mark 41 is observed to enable the downward movement distances of the four balance columns 4 to be equal, so that the load bearing plate 1 is kept horizontal, after the balance columns 4 move downwards to a proper distance, the threaded bar 43 is controlled to move downwards to enter the empty groove I13, meanwhile, the rotating rod I42 is controlled to slightly rotate, so that the arc-shaped limiting plate 45 is slidably inserted into the arc-shaped groove, then, the rotating disc 11 is continuously rotated, the rotating rod I42 drives the connecting ring 44 and the bevel gear I441 to rotate, the bevel gear II 442 and the threaded rod 443 are controlled to rotate, so that the sector plate 47 in threaded connection with the threaded rod 443 moves outwards horizontally, thereby penetrating into the soil, the contact area of the balance columns 4 and the soil is increased, and the stability of the test platform is enhanced.

Example two

In this embodiment, the connection tightness between the steel beam 3 and the engineering pile is enhanced on the basis of the first embodiment, and the steel beam 3 and the engineering pile are conveniently detached afterwards, as shown in fig. 6-10, the front and rear outer end walls of the U-shaped balance block 6 are both provided with a plurality of hoisting mechanisms 60, each hoisting mechanism 60 is composed of a fixed block 61 fixedly connected to the vertical part of the U-shaped balance block 6 and a combined cover plate 62 movably connected to one end of the fixed block 61 away from the U-shaped balance block 6, the combined cover plate 62 is fixedly connected to the fixed block 61 through bolts for clamping and fixing the steel bars passing through the semi-cylindrical grooves 63 and the semi-elliptical cylindrical grooves 64, one ends of the fixed block 61 and the combined cover plate 62 close to each other are respectively provided with the semi-cylindrical grooves 63 and the semi-elliptical cylindrical grooves 64 penetrating through the upper and the lower ends thereof, the major axis of the semi-elliptical cylindrical grooves 64 is larger than the diameter of the semi-cylindrical grooves 63, the minor axis of the semi-elliptical cylindrical grooves 64 is smaller than the diameter of the semi cylindrical grooves 63, so that the hoisting mechanisms 60 can fix the steel bars with different sizes, the application range of the hoisting mechanisms 60 is expanded, the lower parts of the inner surfaces of the semi cylindrical grooves 64 are uniformly provided with a plurality of the triangular plates 641, and the triangular plates are used for extruding the steel bars to support the steel bars on the hoisting mechanisms to primarily hoist the steel bars to support the lower triangular plates to prevent the steel bars from being raised steel bars, and hoist the triangular plates, and the hoisting mechanisms 60;

specifically, one side of each of the triangular plates 641, which is away from the clutch cover 62, is provided with an arc-shaped structure, so as to avoid excessively damaging the surface of the steel bar and reduce the wear degree of the triangular plate 641, thereby prolonging the service life of the clutch cover 62;

in order to clamp the reinforcing steel bar and simultaneously avoid damage caused by excessive extrusion, specifically, referring to fig. 7-9, a moving groove 611 is formed in the lower portion of the inner surface of the semi-cylindrical groove 63, a sliding block 612 is arranged inside the moving groove 611, three arc bars 613 attached to the surface grains of the reinforcing steel bar are uniformly arranged on one side wall of the sliding block 612 close to the cover plate 62, a strong spring 614 is jointly arranged between the lower end of the sliding block 612 and the bottom wall of the moving groove 611, and the arc bars 613 are used for sharing the supporting force for the reinforcing steel bar, so that direct fracture caused by excessive pulling of the triangular plate 641 is avoided, and subsequent use is prevented from being affected;

specifically, one side of the top wall of the moving groove 611, which is far away from the clutch cover plate 62, is provided with a second empty groove 6111, the upper end of the sliding block 612 is provided with a rack 6121, the lower side of the inside of the second empty groove 6111 is provided with a second rotating rod 6122, two sides of the outer surface of the second rotating rod 6122 are respectively provided with a sixth bevel gear 6123 and a straight gear 6124 meshed with the rack 6121, so that the straight gear 6124 meshed with the rack 6121 moves downwards along with the sliding block 612, the rotating rod 6122 rotates, the top wall of the second empty groove 6111 is provided with a first rotating rod 6112, the upper part and the lower part of the outer surface of the first rotating rod 6112 are respectively provided with a fifth bevel gear 6115 meshed with the third bevel gear 6113 and the sixth bevel gear 6123, the straight gear 6124 drives the sixth bevel gear 6123 to rotate through the second rotating rod 6122, and then the fifth bevel gear 6115 is used for rotating the first rotating rod 6112;

specifically, a positioning plate 616 is arranged on the top wall of the second empty slot 6111, a threaded rod is arranged at one end of the positioning plate 616 close to the cover plate 62, the threaded rod is rotatably connected to the positioning plate 616, one end of the threaded rod, far away from the cover plate 62, penetrates through the positioning plate 616 and is provided with a bevel gear four 6114 meshed with a bevel gear three 6113, a baffle 615 penetrating through the inner surface of the semi-cylindrical slot 63 is arranged on the outer surface of one side of the threaded rod close to the cover plate 62, the bevel gear three 6113 drives the meshed bevel gear four 6114 to rotate along with the rotation of the rotating rod one 6112, so that the threaded rod is controlled to rotate, the baffle 615, which is in threaded connection with the threaded rod, moves outwards, the baffle 615 firmly abuts against the outer surface of the steel bar along with the downward movement of the sliding block 612, the damage to the steel bar due to excessive extrusion of the steel bar by the hoisting mechanism 60 is avoided, and the test cost is reduced to a certain extent.

Furthermore, the baffle block 615 is provided with a second arc bar 6151 which is used for extruding and fixing a reinforcing steel bar and has the same shape as the first arc bar 613 and different sizes, and the second arc bar 6151 is used for extruding the reinforcing steel bar and supporting the protrusion on the surface of the reinforcing steel bar, so that the reinforcing steel bar is prevented from sliding down when the engineering pile is drawn, and the accuracy of test data is not influenced.

In order to avoid the inclination of the steel beam 3 during installation and upward movement, further, please refer to fig. 10, two balance mechanisms 5 symmetrically arranged are arranged at the upper end of the load carrying plate 1, each balance mechanism 5 is composed of a support column 51 and a telescopic column 52 connected to the support column 51, the sum of the contracted heights of the support column 51 and the telescopic column 52 is equal to the initial height of the hydraulic jack 2 by adding the support column 51, so that the application range of the telescopic column 52 is expanded, the telescopic column is suitable for hydraulic jacks 2 and even hydraulic telescopic rods with different heights, the limitation of matched use is reduced, the test cost is reduced, U-shaped fixture blocks 53 with openings facing the steel beam 3 are arranged at the upper end of the telescopic column 52, the U-shaped fixture blocks 53 are slidably connected to the front side and the rear side of the steel beam 3, the sum of the contracted heights of the support column 51 and the telescopic column 52 is equal to the initial height of the hydraulic jack 2, the U-shaped fixture blocks 53 are slidably connected to the two sides of the steel beam 3, the steel beam 3 is limited by using the characteristic that the telescopic column 52 can only vertically move, so that the steel beam 3 cannot swing left and right, and the anti-pull test on the engineering pile is affected.

Therefore, the specific implementation manner of this embodiment is:

firstly, a reinforcing steel bar on an engineering pile is straightened to pass through a semi-cylindrical groove 63, then a cover plate 62 is fixed on a fixed block 61 by using a bolt, then a hydraulic jack 2 is started to jack up a steel beam 3, then a hoisting mechanism 60 pulls the engineering pile to move upwards through the reinforcing steel bar, and when the reinforcing steel bar is pulled, the reinforcing steel bar can drive a slider 612 to move downwards through an arc bar I613, so that a rack 6121 drives a meshed straight gear 6124 to rotate, then the bevel gear IV 6114 and a threaded bar thereon are controlled to rotate through transmission of structures such as a rotating bar II 6122, a bevel gear IV 6123 and a rotating bar I6112, so that a block 615 connected with the threaded bar in a threaded manner can horizontally move outwards and is extruded and fixed, the extrusion force of the reinforcing steel bar by the bevel gear block 615 is continuously increased along with the downward movement of the slider 612 until the extrusion force of the reinforcing steel bar is balanced, the damage to the reinforcing steel bar caused by the overlarge extrusion force of the hoisting mechanism 60 is avoided, and the test cost is reduced.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a vertical resistance to plucking ability test platform for engineering stake, includes two load board (1), its characterized in that: hydraulic jacks (2) are arranged at the upper ends of the two load bearing plates (1), a steel beam (3) is arranged at the upper parts of the two hydraulic jacks (2) together, and a U-shaped balance block (6) for fixing a steel bar on an engineering pile is arranged in the middle of the upper end of the steel beam (3);

the utility model discloses a portable bearing plate, including lotus support plate (1), spout (491), slide bar (49), connecting rod (421) that extend to inside of balancing post (4), the upper end of connecting rod (421) is equipped with thread strip (43), the inside upside of lotus support plate (1) has been seted up thread strip (43), thread strip (43) internal thread connects together thread strip (12) and thread strip (12) with thread strip (12) in the threaded connection of together thread strip (43) and threaded connection (12) in will being equipped with a threaded connection (42), just the upper portion of balancing post (4) is cylindrical, the lower part is for losing most advanced toper shape, spout (48) have been seted up to the lower extreme of balancing post (4), the inside of spout (48) is equipped with tapered rod (491) that is used for accelerating entering the inside speed in the soil, just the maximum diameter of tapered rod (491) equals the minimum external diameter of balancing post (4), the upper end of slide bar (49) is equipped with and extends to connecting rod (421) inside of balancing post (4), the upper end of connecting rod (421), the upper end of connecting rod (42) is equipped with dwang (42), thread strip (12) has been seted up thread strip (12) on the inside upside of lotus support plate (1).

2. The vertical uplift resistance test platform for the engineering pile as claimed in claim 1, wherein: the outer surfaces of the four balancing columns (4) are all provided with scale marks (41) with the same height.

3. The vertical uplift resistance test platform for the engineering pile as claimed in claim 2, wherein: a first empty groove (13) which is communicated with the thread groove (12) and is positioned right below the thread groove (12) is formed in the load bearing plate (1), the length of the first empty groove (13) is larger than that of the thread groove (12), and four arc-shaped grooves are uniformly formed in the outer side of the lower end of the rotating rod (42);

the balance post (4) is internally provided with a mounting groove (40), the upper part of the outer surface of the connecting rod (421) is provided with a connecting ring (44) with the same outer diameter as that of the rotating rod I (42), the upper end of the connecting ring (44) is uniformly provided with four arc limiting plates (45) which are respectively connected to the four arc grooves on the same side in a sliding manner, the lower end of the connecting ring (44) is provided with a bevel gear I (441) positioned in the mounting groove (40), and the lower part of the outer surface of the bevel gear I (441) is uniformly engaged with four bevel gear II (442);

four open slots (46) that do not communicate with each other with mounting groove (40) are evenly seted up to the surface lower part of equalizing column (4), four the inside of open slot (46) all is equipped with and is used for increasing equalizing column (4) and land area of contact in order to avoid loading board (1) to last sector plate (47) that move down at the during operation, four one side that is close to each other of sector plate (47) all is equipped with the internal surface that runs through mounting groove (40) and respectively fixed connection is located threaded rod (443) on same one side four bevel gear two (442).

4. The vertical uplift resistance test platform for the engineering pile according to claim 3, wherein the vertical uplift resistance test platform comprises: and a part of the sector plate (47) far away from the second bevel gear (442) is of a conical structure.

5. The vertical uplift resistance test platform for the engineering pile according to claim 1, wherein the vertical uplift resistance test platform comprises: the front and rear outer end walls of the U-shaped balance block (6) are provided with a plurality of hoisting mechanisms (60), each hoisting mechanism (60) is composed of a fixed block (61) fixedly connected to the vertical part of the U-shaped balance block (6) and a combined cover plate (62) movably connected to one end, far away from the U-shaped balance block (6), of the fixed block (61), one end, close to the fixed block (61), of the fixed block (61) and one end, close to the combined cover plate (62), of the fixed block (61) are respectively provided with a semi-cylindrical groove (63) and a semi-elliptical cylindrical groove (64) which penetrate through the upper end and the lower end of the semi-elliptical cylindrical groove (64), and the middle lower portion of the inner surface of the semi-elliptical cylindrical groove (64) is evenly provided with a plurality of triangular plates (641).

6. The vertical uplift resistance test platform for the engineering pile as claimed in claim 5, wherein: one side of each triangular plate (641) far away from the cover closing plate (62) is of an arc structure.

7. The vertical uplift resistance test platform for the engineering pile as claimed in claim 5, wherein: a moving groove (611) is formed in the lower portion of the inner surface of the semi-cylindrical groove (63), a sliding block (612) is arranged inside the moving groove (611), three arc bar I (613) which are attached to the surface lines of the steel bars are uniformly arranged on one side wall, close to the cover plate (62), of the sliding block (612), and a strong spring (614) is arranged between the lower end of the sliding block (612) and the bottom wall of the moving groove (611) together;

a second empty groove (6111) is formed in one side, far away from the clutch cover plate (62), of the top wall of the moving groove (611), a rack (6121) is arranged at the upper end of the sliding block (612), a second rotating rod (6122) is arranged on the lower side inside the second empty groove (6111), six bevel gears (6123) and straight gears (6124) meshed with the rack (6121) are respectively arranged on two sides of the outer surface of the second rotating rod (6122), a first rotating rod (6112) is arranged on the top wall of the second empty groove (6111), and a fifth bevel gear (6115) meshed with the third bevel gear (6113) and the sixth bevel gear (6123) are respectively arranged on the upper portion and the lower portion of the outer surface of the first rotating rod (6112);

the roof of slot two (6111) is equipped with locating plate (616), the one end that is close to of locating plate (616) and closes apron (62) is equipped with the screw rod, the one end that the screw rod kept away from and closes apron (62) runs through locating plate (616) and is equipped with bevel gear four (6114) with bevel gear three (6113) meshing, the screw rod is close to one side surface of closing apron (62) and is equipped with axial block (615) that runs through half cylinder groove (63) internal surface.

8. The vertical uplift resistance test platform for the engineering pile as claimed in claim 7, wherein: and a second arc bar (6151) which is used for extruding and fixing the reinforcing steel bars and has the same shape as the first arc bar (613) and different sizes is arranged on one side wall of the baffle block (615) close to the combined cover plate (62).

9. The vertical uplift resistance test platform for the engineering pile according to claim 1, wherein the vertical uplift resistance test platform comprises: the upper end of loading board (1) is equipped with two balance mechanism (5) that the symmetry set up, balance mechanism (5) comprise support column (51) and flexible post (52) of connection on support column (51), the upper end of flexible post (52) is equipped with U type fixture block (53) of opening towards girder steel (3), both sides around U type fixture block (53) sliding connection is in girder steel (3).

10. The vertical uplift resistance test platform for the engineering pile according to claim 9, wherein: the sum of the contracted heights of the supporting column (51) and the telescopic column (52) is equal to the initial height of the hydraulic jack (2).

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