CN111113212A - Pile head polishing device for low-strain test of cast-in-situ bored pile and construction method - Google Patents

Abstract

The invention discloses a pile head polishing device for a low-strain test of a cast-in-situ bored pile and a construction method, and belongs to the technical field of building construction. The technical scheme is as follows: the utility model provides a bored concrete pile low strain test pile head grinding device, includes the support, corresponding a plurality of universal wheel that sets up on support both ends bottom surface, two tripods of corresponding swing joint tip under the support both ends, the connection montant of swing joint tip under the support center department, the adjusting part of setting between support and connection montant to and set up a plurality of sander under the adjusting part respectively. The invention has the beneficial effects that: the cast-in-situ bored pile low-strain test pile head polishing device provided by the invention is convenient to operate, high in polishing efficiency and stable in operation, and the provided cast-in-situ bored pile low-strain test pile head polishing construction method can prevent large dust from damaging human bodies in the polishing construction process, conveniently controls the polishing levelness and position, and has a good polishing effect.

Description

Pile head polishing device for low-strain test of cast-in-situ bored pile and construction method

Technical Field

The invention relates to the technical field of building construction, in particular to a pile head polishing device for a low-strain test of a cast-in-situ bored pile and a construction method.

Background

The low-strain test of the cast-in-situ bored pile is widely applied to detecting the integrity of the pile body of the concrete pile and judging the degree and the position of the defects of the pile body. The test requires that the sensor is installed to be perpendicular to the top surface of the pile and well coupled, and the position of the excitation point and the position of the sensor are required. Because the bored concrete pile head is unsmooth, in order to ensure experimental effect, need polish the pile head. The pile head is usually ground by workers on site by a handheld grinding machine, so that the pile head is large in dust, long in time consumption and large in harm to human bodies; the polishing levelness and position are not well controlled, the polishing effect is poor, and the requirement of a low strain test is difficult to meet.

In summary, the existing cast-in-situ bored pile low-strain polishing devices are mostly hand-held polishing machines, and have large polishing construction dust and great harm to human bodies; long polishing time, poor levelness and position control, poor polishing effect and the like.

How to solve the above technical problems is the subject of the present invention.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the pile head polishing device for the low-strain test of the cast-in-situ bored pile, which is convenient to operate, high in polishing efficiency and stable in operation, and meanwhile, the pile head polishing construction method for the low-strain test of the cast-in-situ bored pile, which can prevent dust from damaging human bodies in the polishing construction process, is convenient to control the polishing levelness and position and has a good polishing effect, is provided.

In order to achieve the purpose, the invention provides a pile head grinding device for a low-strain test of a cast-in-situ bored pile, which comprises a support, a plurality of universal wheels correspondingly arranged on the bottom surfaces of two ends of the support, two tripods correspondingly and movably connected to the lower end parts of the two ends of the support, a connecting vertical rod movably connected to the lower end part of the center of the support, an adjusting part arranged between the support and the connecting vertical rod, and a plurality of grinders respectively arranged at the lower end parts of the adjusting part, wherein the universal wheels are arranged to facilitate the transfer of the device, the tripods are movably connected to the two ends of the support, so that the device can be stably supported during grinding operation, the stability of the device during operation is ensured, and the adjusting part is arranged to adjust the positions of the grinders and improve the grinding efficiency.

The invention is characterized in that the adjusting component comprises an angle adjusting component arranged between the bracket and the connecting vertical rod, a plurality of grinding support rods arranged on the angle adjusting component, a sliding sleeve movably connected at the lower end part of each grinding support rod, and a third fastener arranged between each sliding sleeve and the corresponding grinding support rod; each sliding sleeve is fixedly provided with one sander; the angle adjusting assembly is arranged, so that the position of the grinder on the pile head can be adjusted, a plurality of positions on the pile head can be ground without moving the device, and the grinding efficiency is further improved; on the vaulting pole of polishing, set up the slip sleeve of fixed sander through the third fastener, can adjust the roughness of polishing of sander on the one hand, during on the other hand can prevent transfer device, sander and pile head and/or job site bulge take place to interfere.

The angle adjusting assembly is characterized by comprising a ratchet wheel, a plurality of grinding support rods, a pawl, a first spring, a sliding push plate, a second spring, a third spring, a fourth spring, a fifth spring, a sixth spring, a fifth spring, a sixth spring, a fifth spring, a sixth spring, a fifth; the sliding push plate is arranged, so that the adjusting window can be closed when the grinding support rod is subjected to relative angle adjustment, and dust is prevented from entering the adjusting cylinder during grinding.

The polishing support rod is characterized by comprising a polishing vertical rod, a first supporting part arranged in the middle of the polishing vertical rod, a sleeve ring arranged at the first supporting end part, a second supporting part arranged at one end part of the polishing vertical rod, a connecting groove formed in the end surface of the second supporting part, and a baffle arranged at the end part of the connecting groove;

the adjusting cylinder comprises a cylinder body, a connecting plate, a through hole, a plurality of limiting windows and sliding grooves, wherein the connecting plate is arranged at one end of the cylinder body and is mutually perpendicular to the axis of the cylinder body, the through hole is formed in the center of the connecting plate, the limiting windows are uniformly formed in the wall of the cylinder body in a stepped shape along the circumferential direction of the cylinder body, and the sliding grooves are formed in two end faces of each limiting window along the circumferential direction of the cylinder body.

The sleeve joint ring is sleeved on the connecting vertical rod and is in running fit with the connecting vertical rod;

one end of the pawl is arranged in the connecting groove, the baffle limits the connecting groove, and the first spring is arranged between the end face of the connecting groove and the bottom wall of the connecting groove;

the end part, far away from the second supporting part, of the polishing vertical rod is provided with the sliding sleeve;

preferably, the first supporting part and the second supporting part are respectively arranged in a telescopic manner, so that the distance between the sander and the central line of the connecting vertical rod can be adjusted, and the sanding range is expanded;

the first supporting part comprises a first supporting cylinder, a first supporting rod and a first fastener, wherein the center line of the first supporting cylinder is perpendicular to the polishing vertical rod, the first supporting rod is connected with the first supporting cylinder in a sleeved mode, and the first fastener is arranged between the first supporting cylinder and the first supporting rod; the outer end part of the first supporting rod is provided with the sleeving ring;

the second supporting part comprises a second supporting barrel, a second supporting rod and a second fastening piece, wherein the center line of the second supporting barrel is perpendicular to the vertical polishing rod, the second supporting rod is connected with the second supporting barrel in a sleeved mode, and the second fastening piece is arranged between the second supporting barrel and the second supporting rod; the outer end face of the second supporting rod is provided with the connecting groove;

the cylinder body is sleeved outside the ratchet wheel, the through hole is sleeved outside the connecting vertical rod and is in running fit with the connecting vertical rod, and the outer end face of the connecting plate is fixedly connected with the support;

the end parts of the second supporting parts of the grinding support rods correspondingly penetrate through the limiting windows respectively;

the end part of the second supporting rod penetrates through the corresponding limiting window;

one end of the sliding push plate is fixed on the side surface of the second support rod, and the other end of the sliding push plate is arranged in the corresponding sliding groove and is in sliding fit with the sliding groove;

the other end face of the sliding push plate, which is positioned on one side corresponding to the second support rod, and the bottom wall of the corresponding sliding groove are provided with the second springs;

when the angle adjusting assembly is in a reset state, angles between adjacent polishing support rods are the same corresponding to the center line of the connecting vertical rod, positions of the polishing devices on the top surface of the pile head can be uniformly distributed, and when the second support rod is positioned at the end part of the limiting window far away from the second spring, the circumferential positions corresponding to the polishing support rods are fixed due to the matching effect of the ratchet wheel and the pawl and the effect of the second spring and the sliding push plate, namely the circumferential positions of the corresponding polishing devices are fixed, so that polishing operation can be performed on the positions corresponding to the top surface of the pile head;

when the position of a single sander needs to be adjusted, the sanding stay bar is shifted to the other end of the limiting window to a corresponding position, the circumferential position corresponding to the sanding stay bar can be fixed under the matching action of the ratchet wheel and the pawl and the action of the second spring and the sliding push plate, the corresponding top surface position of the pile head can be sanded, the position of the sander can be flexibly adjusted according to needs, and the efficiency of sanding operation is further improved;

when needs adjustment when angle adjusting element resets, can press the pressure spring buckle, relieve connect the montant with the spacing relation of circumference between the support is to keeping away from the direction of second spring is rotated connect the montant at least a week under the effect of second spring, the second bracing piece is pushed spacing window is kept away from the tip of second spring, then through the spring buckle is right connect the montant with the support carries on spacingly can.

The invention is characterized in that the support comprises a cross bar, a connecting sleeve arranged in the middle of the cross bar, a connecting cylinder arranged on the connecting sleeve and having a central line perpendicular to the central line of the cross bar, two supporting vertical bars correspondingly arranged at two ends of the cross bar and having central lines parallel to the central line of the connecting cylinder, a base arranged on the end surface of each supporting vertical bar far away from the cross bar, and an inclined strut arranged between each base and the corresponding supporting vertical bar;

the connecting cylinder is connected with the connecting vertical rod through a spring buckle; the spring fastener is prior art and is not described herein.

The connecting cylinder is sleeved on the connecting vertical rod;

the universal wheels are arranged on the bottom surface of the base;

the tripod is arranged on the supporting vertical rod;

preferably, the central line of the connecting cylinder is positioned at the center between the central lines of the two vertical supporting rods, so that the balance of the device during construction operation can be further ensured, and the device can run stably.

The drilling bored concrete pile low-strain test pile head grinding device is characterized by further comprising a plurality of limiting pins which are detachably arranged between the support and the tripod;

the support also comprises an annular groove formed in the circumferential surface of the vertical support rod, two first U-shaped grooves correspondingly formed in two sides of one end face of the annular groove, a first limiting hole, a central line, two second U-shaped grooves and a second limiting hole, wherein the central line penetrates through the two first U-shaped grooves along the radial direction of the vertical support rod;

the tripod comprises a connecting ring, three supporting legs uniformly arranged on the outer side surface of the connecting ring along the circumferential direction of the connecting ring, two first limiting lugs correspondingly arranged on two sides of the outer end surface of the connecting ring, two third limiting lugs arranged on the two first limiting lugs along the radial direction of the connecting ring and respectively penetrating through two first limiting lugs, two second limiting lugs correspondingly arranged on two sides of the inner end surface of the connecting ring and respectively corresponding to the two first limiting lugs, and four limiting holes arranged on the two second limiting lugs along the radial direction of the connecting ring and respectively penetrating through the two second limiting lugs;

the projection of the first U-shaped groove on the end face of the annular groove is overlapped with the projection of the second U-shaped groove on the end face of the annular groove, and the radian of the overlapped part is the same as that of the first limiting bump and/or that of the second bump;

the first limiting hole and the second limiting hole are respectively located at the end parts which are far away from the projection of the first U-shaped groove on the end face of the annular groove and the projection of the second U-shaped groove on the end face of the annular groove, wherein the projections of the first U-shaped groove and the second U-shaped groove are mutually overlapped.

The connecting ring is sleeved on the annular groove;

when the device needs to be transferred, the second limiting hole is matched with the third limiting hole, the limiting pin penetrates through the second limiting hole and the third limiting hole respectively, the first limiting lug is matched with the second U-shaped groove, the end face of the second limiting lug abuts against the end face of the annular groove, provided with the first U-shaped groove, and at the moment, the universal wheel is in contact with the ground to support the device;

when polishing the operation, first spacing hole with the spacing hole of fourth cooperatees, just the spacer pin runs through respectively first spacing hole with the spacing hole of fourth, the spacing lug of second with first U type groove cooperatees, the terminal surface of first spacing lug is supported the ring channel is seted up on the terminal surface in second U type groove, at this moment, the universal wheel does not contact ground, the tripod supports the device.

Preferably, the tripod further comprises an arc-shaped reinforcing rod arranged among the three supporting legs, so that the supporting strength of the tripod is further improved, and the running stability of the tripod is improved.

The cast-in-situ bored pile low-strain test pile head polishing construction method by using the cast-in-situ bored pile low-strain test pile head polishing device comprises the following steps:

step S1: adjusting the connection state of the tripod and the support to enable the universal wheel set device to support, moving the device to a pile head to be polished, enabling a plurality of polishers to be located right above the pile head, and adjusting the plurality of polishers to be close to the position, needing to be polished, of the top surface of the pile head;

step S2: adjusting the connection state of the tripod and the bracket to enable the tripod to support the device;

step S3: adjusting the adjusting component to enable polishing sheets of a plurality of polishers to be attached to the corresponding positions of the pile head top surfaces;

step S4: turning on a sander switch, sanding the top surface of the pile head at the corresponding position until the pile head is flat, and turning off the sander switch;

step S5: repeating the step S3 and the step S4 until all parts of the top surface of the pile head are polished to be flat;

step S6: and repeating the steps S1 to S5, and grinding the pile head needing to be ground.

The present invention is also specifically characterized in that the step S3 includes the following steps:

s301: adjusting the position of the sliding sleeve on the grinding vertical rod until the grinding piece is close to the top surface of the pile head;

s302: adjusting the first supporting part and the second supporting part as required, and determining the distance between the corresponding sander and the central line of the connecting vertical rod;

s303: adjusting an angle adjusting assembly, and determining an angle between two adjacent grinding support rods relative to the central line of the connecting vertical rod;

s304: and adjusting the position of the sliding sleeve on the grinding vertical rod until the grinding sheet is attached to the top surface of the pile head.

The invention has the beneficial effects that: the universal wheels are arranged, the device is convenient to transfer, the tripod is movably connected to the two ends of the support, the device can be stably supported when the polishing operation is carried out, the stability of the device in operation is ensured, the position of the polisher can be adjusted by arranging the adjusting part, and the polishing efficiency is improved; the angle adjusting assembly is arranged, so that the position of the grinder on the pile head can be adjusted, a plurality of positions on the pile head can be ground without moving the device, and the grinding efficiency is further improved; a sliding sleeve for fixing the sander is arranged on the sanding stay bar through a third fastener, so that the sanding flatness of the sander can be adjusted, and the sander can be prevented from interfering with a pile head and/or a bulge on a construction site during transferring of the device; the angle adjusting assembly is arranged, so that the position of the sander can be flexibly adjusted according to the requirement, and the efficiency of sanding operation is further improved; the sliding push plate is arranged, so that the adjusting window can be closed when the relative angle adjustment is carried out on the polishing support rod, and dust is prevented from entering the adjusting cylinder during polishing; set up the detachable spacer pin and be connected support and tripod, conveniently switch convenient operation to two kinds of support states of device. The pile head polishing construction method for the low-strain test of the cast-in-situ bored pile can prevent large dust from damaging human bodies in the polishing construction process, conveniently control the polishing levelness and position control, and has a good polishing effect.

Drawings

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

FIG. 2 is a partially sectioned schematic view of the present invention;

FIG. 3 is a schematic diagram of a partial connection according to the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

FIG. 5 is a schematic view of the structure of the sanding stay of the present invention;

FIG. 6 is a schematic view of the structure of the adjusting cylinder of the present invention;

FIG. 7 is a schematic axial sectional view of an adjustment barrel of the present invention;

FIG. 8 is a schematic view of a tripod stand according to the present invention in a coupled state;

FIG. 9 is a schematic view of another state of the tripod and the stand according to the present invention;

FIG. 10 is a schematic structural view of a stent according to the present invention;

FIG. 11 is an enlarged view of a portion of the structure of FIG. 10 at B;

fig. 12 is a schematic structural view of the tripod in the present invention.

Wherein the reference numerals are: 1. a support; 101. a cross bar; 102. a connecting sleeve; 103. a connecting cylinder; 104. supporting the vertical rod; 105. a diagonal brace; 106. a base; 107. an annular groove; 108. a first U-shaped groove; 109. a second U-shaped groove; 110. a first limit hole; 111. a second limiting hole; 2. connecting the vertical rods; 3. a ratchet wheel; 4. polishing the support rod; 401. grinding the vertical rod; 402. a first support cylinder; 403. a first support bar; 404. a sleeving connection ring; 405. a second support cylinder; 406. a second support bar; 407. connecting grooves; 408. a baffle plate; 409. a first fastener; 410. a second fastener; 5. an adjusting cylinder; 501. a cartridge body; 502. a connecting plate; 503. a limiting window; 504. a chute; 505. a through hole; 6. a pawl; 7. a first spring; 8. sliding the push plate; 9. a second spring; 10. a sander; 1001. a sander switch; 11. a sliding sleeve; 12. a tripod; 1201. a connecting ring; 1202. a first limit bump; 1203. a third limiting hole; 1204. a second limit bump; 1205. a fourth limiting hole; 1206. supporting legs; 1207. an arc-shaped reinforcing rod; 13. a spacing pin; 14. pile head; 15. a universal wheel; 16. a ground surface; 17. a spring buckle; 18. and a third fastener.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Referring to fig. 1 to 12, an embodiment of the present invention provides a pile head polishing device for a low-strain test of a cast-in-situ bored pile, including a support 1, a plurality of universal wheels 15 correspondingly disposed on bottom surfaces of two ends of the support 1, two tripods 12 correspondingly movably connected to lower ends of two ends of the support 1, a connecting vertical rod 2 movably connected to a lower end of a center of the support 1, an adjusting member disposed between the support 1 and the connecting vertical rod 2, and a plurality of polishers 10 respectively disposed at lower ends of the adjusting member, wherein the universal wheels 15 are disposed to facilitate transfer of the device, the tripods 12 are movably connected to two ends of the support, so that the device can be stably supported during polishing operation, thereby ensuring stability of the device during operation, and the adjusting member is disposed to adjust positions of the polishers 10 and improve polishing efficiency.

The invention is characterized in that the adjusting component comprises an angle adjusting component arranged between the bracket 1 and the connecting vertical rod 2, a plurality of grinding support rods 4 arranged on the angle adjusting component, a sliding sleeve 11 movably connected at the lower end part of each grinding support rod 4, and a third fastener 18 arranged between each sliding sleeve 11 and the corresponding grinding support rod 4; a sander 10 is fixed on each sliding sleeve 11; the angle adjusting assembly is arranged, so that the position of the grinder 10 on the pile head can be adjusted, a plurality of positions on the pile head can be ground without moving the device, and the grinding efficiency is further improved; on the sanding brace 4, the sliding sleeve 11 for fixing the sander 10 is arranged through the third fastener 18, so that on one hand, the sanding flatness of the sander 10 can be adjusted, and on the other hand, the sander 10 can be prevented from interfering with a pile head and/or a construction site bulge when the device is transferred.

The angle adjusting assembly is characterized by comprising a ratchet wheel 3 which is fixedly sleeved on the upper end part of a connecting vertical rod 2, a plurality of grinding support rods 4 which are fixedly arranged at the lower end part of the center of a support 1, an adjusting cylinder 5 which is positioned outside the ratchet wheel 3, the middle parts of the grinding support rods are respectively sleeved on the connecting vertical rod 2, the upper end parts of the grinding support rods 4 respectively penetrate through the side wall of the adjusting cylinder 5, a pawl 6 which is matched with the ratchet wheel 3 is movably connected to the upper end part of each grinding support rod 4, a first spring 7 which is arranged between the pawl 6 and the upper end part of the corresponding grinding support rod 4, a sliding push plate 8 is respectively arranged between each grinding support rod 4 and the adjusting cylinder 5, a sliding push plate 8 is arranged on one side corresponding to each grinding support rod 4, and a second spring 9 is respectively arranged.

The polishing support rod 4 is characterized by comprising a polishing vertical rod 401, a first support part arranged in the middle of the polishing vertical rod 401, a socket ring 404 arranged at the end part of the first support part, a second support part arranged at one end part of the polishing vertical rod 401, a connecting groove 407 formed in the end surface of the second support part, and a baffle 408 arranged at the end part of the connecting groove 407;

the adjusting cylinder 5 comprises a cylinder body 501, a connecting plate 501 arranged at one end of the cylinder body 501 and perpendicular to the axis of the cylinder body 501, a through hole 505 formed in the center of the connecting plate 501, a plurality of limiting windows 503 uniformly formed in the cylinder wall of the cylinder body 501 in a step shape along the circumferential direction of the cylinder body 501, and sliding grooves 504 formed in two end faces of each limiting window 503 along the circumferential direction of the cylinder body 501.

The sleeve joint ring 404 is sleeved on the connecting vertical rod 2 and is in running fit with the connecting vertical rod 2;

one end of the pawl 6 is arranged in the connecting groove 407, the baffle 408 limits the pawl, and a first spring 7 is arranged between the end surface of the connecting groove 407 and the bottom wall of the connecting groove 407 of the pawl 6;

the end part of the grinding vertical rod 401 far away from the second supporting part is provided with a sliding sleeve 11;

preferably, the first supporting part and the second supporting part are respectively arranged in a telescopic manner, so that the distance between the sander 10 and the central line of the connecting vertical rod 2 can be adjusted, and the sanding range is expanded;

the first supporting part comprises a first supporting cylinder 402 with the central line vertical to the grinding vertical rod 401, a first supporting rod 403 connected with the first supporting cylinder 402 in a sleeved mode, and a first fastener 409 arranged between the first supporting cylinder 402 and the first supporting rod 403; a sleeving ring 404 is arranged at the outer end part of the first support rod 403;

the second supporting part comprises a second supporting cylinder 405 with the central line perpendicular to the vertical polishing rod 401, a second supporting rod 406 in sleeved connection with the second supporting cylinder 405, and a second fastener 410 arranged between the second supporting cylinder 405 and the second supporting rod 406; the outer end face of the second support rod 406 is provided with a connecting groove 407;

the cylinder body 501 is sleeved outside the ratchet wheel 3, the through hole 505 is sleeved outside the connecting vertical rod 2 and is in running fit with the connecting vertical rod 2, and the outer end face of the connecting plate 502 is fixedly connected with the bracket 1;

the end parts of the second supporting parts of the grinding stay bars 4 correspondingly penetrate through a limiting window 503 respectively;

the end of the second support bar 406 penetrates through the corresponding limit window 503;

one end of the sliding push plate 8 is fixed on the side surface of the second support rod 406, and the other end of the sliding push plate 8 is arranged in the corresponding sliding groove 504 and is in sliding fit with the sliding groove 504;

a second spring 9 is arranged between the other end surface of the sliding push plate 8 positioned at the corresponding side of the second support rod 406 and the bottom wall of the corresponding sliding groove 504;

when the angle adjusting assembly is in a reset state, the center lines of the vertical rods 2 are correspondingly connected, the angles between the adjacent polishing support rods 4 are the same, the positions of the polishing devices 10 on the top surface of the pile head 14 can be uniformly distributed, at the moment, when the second support rod 406 is positioned at the end part of the limiting window 503 far away from the second spring 9, the corresponding circumferential positions of the polishing support rods 4 are fixed due to the matching effect of the ratchet wheel 3 and the pawl 6 and the effect of the second spring 9 and the sliding push plate 8, namely the circumferential positions of the corresponding polishing devices 10 are fixed, and the polishing operation can be carried out on the corresponding positions of the top surface of the pile head 14;

when the position of a single sander 10 needs to be adjusted, the sanding stay bar 4 is shifted to the other end of the limiting window 503 to a corresponding position, and under the matching action of the ratchet wheel 3 and the pawl 6 and the action of the second spring 9 and the sliding push plate 8, the corresponding circumferential position of the sanding stay bar 4 can be fixed, so that the sanding operation can be performed on the top surface position of the corresponding pile head 14, the position of the sander 10 can be flexibly adjusted as required, and the efficiency of the sanding operation is further improved;

when needs angle regulation subassembly resets, can press spring buckle 17, remove the spacing relation of circumference between connecting montant 2 and the support 1, rotate to the direction of keeping away from second spring 9 and connect montant 2 at least a week, under the effect of second spring 9, second bracing piece 406 is pushed to spacing window 503 and is kept away from the tip of second spring 9, then through spring buckle 17 to connecting montant 2 and support 1 carry on spacingly can.

The invention is characterized in that the support 1 comprises a cross bar 101, a connecting sleeve 102 arranged in the middle of the cross bar 101, a connecting cylinder 103 arranged on the connecting sleeve 102 and having a central line perpendicular to the central line of the cross bar 101, two supporting vertical bars 104 correspondingly arranged at two ends of the cross bar 101 and having central lines parallel to the central line of the connecting cylinder 103, a base 106 arranged on the end surface of each supporting vertical bar 104 far away from the cross bar 101, and an inclined strut 105 arranged between each base 106 and the corresponding supporting vertical bar 104;

the connecting cylinder 103 is connected with the connecting vertical rod 2 through a spring buckle 17; spring catch 17 is prior art and will not be described further herein.

The connecting cylinder 103 is sleeved on the connecting vertical rod 2;

universal wheels 15 are arranged on the bottom surface of the base 106;

a tripod 12 is arranged on the vertical supporting rod 104;

preferably, the center line of the connected cylinder 103 is located at the center between the center lines of the two vertical support rods 104, so that the balance and the stable operation of the device during construction operation can be further ensured.

The drilling bored concrete pile low-strain test pile head grinding device is further characterized by comprising a plurality of limiting pins 13 which are detachably arranged between the support 1 and the tripod 12;

the support 1 further comprises an annular groove 107 formed in the circumferential surface of the vertical support rod 104, two first U-shaped grooves 108 correspondingly formed in two sides of one end surface of the annular groove 107, a first limiting hole 110, a central line of which penetrates through the two first U-shaped grooves 108, two second U-shaped grooves 109 correspondingly formed in two sides of the other end surface of the annular groove 107 along the radial direction of the vertical support rod 104, and a second limiting hole 111, a central line of which penetrates through the two second U-shaped grooves 109 along the radial direction of the vertical support rod 104;

the tripod 12 comprises a connecting ring 1201, three support legs 1206 uniformly arranged on the outer side surface of the connecting ring 1201 along the circumferential direction of the connecting ring 1201, two first limiting lugs 1202 correspondingly arranged on two sides of the outer end surface of the connecting ring 1201, third limiting holes 1203 arranged on the two first limiting lugs 1202 along the radial direction of the connecting ring 1201 and respectively penetrating through the two first limiting lugs 1202, second limiting lugs 1204 correspondingly arranged on two sides of the inner end surface of the connecting ring 1201 and respectively corresponding to the two first limiting lugs 1202, and fourth limiting holes 1205 arranged on the two second limiting lugs 1204 along the radial direction of the connecting ring 1201 and respectively penetrating through the two second limiting lugs 1204;

the projection of the first U-shaped groove 108 on the end face of the annular groove 107 is overlapped with the projection of the second U-shaped groove 109 on the end face of the annular groove 107, and the radian of the overlapped part is the same as that of the first limiting bump 1202 and/or that of the second bump 1202;

the first limiting hole 110 and the second limiting hole 111 are respectively located at the end parts far away from the projection of the first U-shaped groove 108 on the end face of the annular groove 107 and the projection of the second U-shaped groove 109 on the end face of the annular groove 107, which are mutually overlapped.

The connecting ring 1201 is sleeved on the annular groove 107;

when the device needs to be transferred, the second limiting hole 11 is matched with the third limiting hole 1203, the limiting pin 13 penetrates through the second limiting hole 11 and the third limiting hole 1203 respectively, the first limiting lug 1202 is matched with the second U-shaped groove 109, the end face of the second limiting lug 1204 is abutted against the end face of the annular groove 107 provided with the first U-shaped groove 108, and at the moment, the universal wheel 15 is in contact with the ground 16 to support the device;

when the polishing operation is performed, the first limiting hole 110 is matched with the fourth limiting hole 1205, the limiting pin 13 penetrates through the first limiting hole 110 and the fourth limiting hole 1205 respectively, the second limiting convex block 1204 is matched with the first U-shaped groove 108, the end face of the first limiting convex block 1202 is abutted to the end face, provided with the second U-shaped groove 109, of the annular groove 107, at the moment, the universal wheel 15 is not in contact with the ground, and the tripod 12 supports the device.

Preferably, the tripod 12 further includes a curved stiffener 1207 disposed between the three support legs 1206.

The cast-in-situ bored pile low-strain test pile head polishing construction method by using the cast-in-situ bored pile low-strain test pile head polishing device comprises the following steps of:

step S1: adjusting the connection state of a tripod 12 and the support 1, enabling a universal wheel 14 to support the device, moving the device to a pile head 14 to be polished, enabling a plurality of polishers 10 to be located right above the pile head 14, and adjusting the plurality of polishers 10 to be close to the position, needing to be polished, of the top surface of the pile head 14;

step S2: adjusting the connection state of the tripod 12 and the bracket 1 to enable the tripod 12 to support the device;

step S3: adjusting the adjusting component to make the polishing sheets of a plurality of polishers 10 fit with the corresponding positions of the top surface of the pile head 14;

step S4: turning on a sander switch 1001, sanding the top surface of the pile head 14 at the corresponding position until the top surface is flat, and turning off the sander switch 1001;

step S5: repeating the step S3 and the step S4 until all parts of the top surface of the pile head 14 are polished to be flat;

step S6: and repeating the steps S1 to S5, and grinding the pile head 14 needing to be ground.

The present invention is also specifically characterized in that the step S3 includes the steps of:

s301: adjusting the position of the sliding sleeve 11 on the grinding vertical rod 401 until the grinding sheet is close to the top surface of the pile head 14;

s302: adjusting the first supporting part and the second supporting part as required, and determining the distance between the corresponding sander 10 and the central line of the connecting vertical rod 2;

s303: adjusting an angle adjusting component, and determining an angle between two adjacent grinding support rods 4 relative to the central line of the connecting vertical rod 2;

s304: and adjusting the position of the sliding sleeve 11 on the grinding vertical rod 401 until the grinding sheet is attached to the top surface of the pile head 14.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a bored concrete pile low strain test pile head grinding device, a serial communication port, including support (1), corresponding setting is in a plurality of universal wheel (15) on support (1) both ends bottom surface, corresponding swing joint are in two tripod (12) of tip under support (1) both ends, swing joint are in support (1) center department tip down be connected montant (2), set up support (1) with connect the adjusting part between montant (2), and set up respectively a plurality of sander (10) of tip under the adjusting part.

2. The cast-in-situ bored pile low-strain test pile head grinding device according to claim 1, wherein the adjusting component comprises an angle adjusting assembly arranged between the support (1) and the connecting vertical rod (2), a plurality of grinding support rods (4) arranged on the angle adjusting assembly, a sliding sleeve (11) movably connected to the lower end of each grinding support rod (4), and a third fastening member (18) arranged between each sliding sleeve (11) and the corresponding grinding support rod (4); one sander (10) is fixed on each sliding sleeve (11).

3. The cast-in-situ bored pile low-strain test pile head grinding device according to claim 2, wherein the angle adjusting assembly comprises a ratchet wheel (3) fixed to the upper end of the connecting vertical rod (2) in a sleeved manner, a lower end fixed to the center of the support (1), an adjusting cylinder (5) located outside the ratchet wheel (3), a plurality of grinding support rods (4) respectively sleeved on the connecting vertical rod (2) in the middle, the upper end of each grinding support rod (4) respectively penetrates through the side wall of the adjusting cylinder (5), a pawl (6) matched with the ratchet wheel (3) is respectively movably connected to the upper end of each grinding support rod (4), a first spring (7) is arranged between the pawl (6) and the corresponding upper end of the grinding support rod (4), a sliding push plate (8) is respectively arranged between the two sides of each grinding support rod (4) and the adjusting cylinder (5), and a second spring (9) is respectively arranged between the sliding push plate (8) at one side corresponding to each grinding stay bar (4) and the adjusting cylinder (5).

4. The cast-in-situ bored pile low-strain test pile head grinding device according to claim 3, wherein the grinding brace rod (4) comprises a grinding vertical rod (401), a first supporting part arranged in the middle of the grinding vertical rod (401), a sleeving ring (404) arranged at the first supporting end part and having a central line parallel to the grinding vertical rod (4-1), a second supporting part arranged at one end part of the grinding vertical rod (401), a connecting groove (407) formed in the end surface of the second supporting part, and a baffle (408) arranged at the end part of the connecting groove (407);

the adjusting cylinder (5) comprises a cylinder body (501), a connecting plate (501) which is arranged at one end of the cylinder body (501) and is perpendicular to the axis of the cylinder body (501), a through hole (505) formed in the center of the connecting plate (501), and a plurality of limiting windows (503) which are uniformly arranged in a stepped manner in the circumferential direction of the cylinder body (501), and sliding grooves (504) which are formed in the circumferential direction of the cylinder body (501) and are formed in the two end faces of each limiting window (503).

5. The cast-in-situ bored pile low-strain test pile head grinding device according to any one of claims 1 to 4, wherein the support (1) comprises a cross rod (101), a connecting sleeve (102) disposed in the middle of the cross rod (101), a connecting sleeve (103) disposed on the connecting sleeve (102) and having a center line perpendicular to the center line of the cross rod (101), two vertical support rods (104) disposed at two ends of the cross rod (101) and having center lines parallel to the center line of the connecting sleeve (103), a base (106) disposed on an end surface of each vertical support rod (104) away from the cross rod (101), and a diagonal brace (105) disposed between each base (106) and the corresponding vertical support rod (104);

the connecting cylinder (103) is connected with the connecting vertical rod (2) through a spring buckle (17).

6. The cast-in-situ bored pile low-strain test pile head grinding device according to claim 5, further comprising a plurality of stopper pins (13) detachably disposed between the stand (1) and the tripod (12);

the support (1) further comprises an annular groove (107) formed in the circumferential surface of the vertical support rod (104), two first U-shaped grooves (108) correspondingly formed in two sides of one end surface of the annular groove (107), two second U-shaped grooves (109) correspondingly formed in two sides of the other end surface of the annular groove (107) along the radial direction of the vertical support rod (104) and a second limiting hole (111) which is formed in the radial direction of the vertical support rod (104) and penetrates through the two second U-shaped grooves (109);

the tripod (12) comprises a connecting ring (1201), three supporting legs (1206) uniformly arranged on the outer side surface of the connecting ring (1201) along the circumferential direction of the connecting ring (1201), two first limiting lugs (1202) correspondingly arranged on two sides of the outer end surface of the connecting ring (1201), and two first limiting lugs (1202) arranged on the two first limiting lugs (1202) along the radial direction of the connecting ring (1201), third limiting holes (1203) respectively penetrating through the two first limiting lugs (1202), second limiting lugs (1204) correspondingly arranged on two sides of the inner end surface of the connecting ring (1201) and respectively corresponding to the two first limiting lugs (1202), and along the radial direction of the connecting ring (1201), are arranged on the two second limit lugs (1204), and respectively penetrate through the fourth limiting holes (1205) of the two second limiting lugs (1204);

the projection of the first U-shaped groove (108) on the end face of the annular groove (107) is overlapped with the projection of the second U-shaped groove (109) on the end face of the annular groove (107), and the radian of the overlapped part is the same as that of the first limiting bump (1202) and/or that of the second bump (1202);

the first limiting hole (110) and the second limiting hole (111) are respectively located at the end parts, far away from the projection of the first U-shaped groove (108) on the end face of the annular groove (107), and the projection of the second U-shaped groove (109) on the end face of the annular groove (107) are mutually overlapped.

7. A cast-in-situ bored pile low-strain test pile head grinding construction method by using the cast-in-situ bored pile low-strain test pile head grinding device of any one of claims 1 to 6, comprising the steps of:

step S1: adjusting the connection state of the tripod (12) and the support (1), enabling the universal wheels (14) to support the device, moving the device to a pile head (14) to be ground, enabling a plurality of grinders (10) to be located right above the pile head (14), and adjusting the plurality of grinders (10) to be close to the position, needing to be ground, of the top surface of the pile head (14);

step S2: adjusting the connection state of the tripod (12) and the bracket (1) to enable the tripod (12) to support the device;

step S3: adjusting the adjusting component to enable the grinding pieces of the plurality of grinders (10) to be attached to the positions corresponding to the top surfaces of the pile heads (14);

step S4: starting a sander switch (1001), sanding the top surface of the pile head (14) at the corresponding position until the top surface is flat, and closing the sander switch (1001);

step S5: repeating the step S3 and the step S4 until all parts of the top surface of the pile head (14) are polished to be flat;

step S6: and repeating the steps S1 to S5, and grinding the pile head (14) needing to be ground.

8. The cast-in-situ bored pile low-strain test pile head grinding construction method using the cast-in-situ bored pile low-strain test pile head grinding device according to claim 7, wherein the step S3 includes the steps of:

s301: adjusting the position of the sliding sleeve (11) on the grinding vertical rod (401) until the grinding sheet is close to the top surface of the pile head (14);

s302: adjusting the first supporting part and the second supporting part as required, and determining the distance between the corresponding sander (10) and the central line of the connecting vertical rod (2);

s303: adjusting an angle adjusting component, and determining an angle between every two adjacent grinding support rods (4) relative to the central line of the connecting vertical rod (2);

s304: and adjusting the position of the sliding sleeve (11) on the grinding vertical rod (401) until the grinding sheet is attached to the top surface of the pile head (14).

9. The cast-in-situ bored pile low-strain test pile head grinding construction method using the cast-in-situ bored pile low-strain test pile head grinding device according to any one of claims 1 to 6, comprising the steps of:

step S1: adjusting the connection state of the tripod (12) and the support (1), enabling the universal wheels (14) to support the device, moving the device to a pile head (14) to be ground, enabling a plurality of grinders (10) to be located right above the pile head (14), and adjusting the plurality of grinders (10) to be close to the position, needing to be ground, of the top surface of the pile head (14);

step S2: adjusting the connection state of the tripod (12) and the bracket (1) to enable the tripod (12) to support the device;

step S3: adjusting the adjusting component to enable the grinding pieces of the plurality of grinders (10) to be attached to the positions corresponding to the top surfaces of the pile heads (14);

step S4: starting a sander switch (1001), sanding the top surface of the pile head (14) at the corresponding position until the top surface is flat, and closing the sander switch (1001);

step S5: repeating the step S3 and the step S4 until all parts of the top surface of the pile head (14) are polished to be flat;

step S6: and repeating the steps S1 to S5, and grinding the pile head (14) needing to be ground.

10. The cast-in-situ bored pile low-strain test pile head grinding construction method using the cast-in-situ bored pile low-strain test pile head grinding device according to claim 9, wherein the step S3 includes the steps of:

s301: adjusting the position of the sliding sleeve (11) on the grinding vertical rod (401) until the grinding sheet is close to the top surface of the pile head (14);

s302: adjusting the first supporting part and the second supporting part as required, and determining the distance between the corresponding sander (10) and the central line of the connecting vertical rod (2);

s303: adjusting an angle adjusting component, and determining an angle between every two adjacent grinding support rods (4) relative to the central line of the connecting vertical rod (2);

s304: and adjusting the position of the sliding sleeve (11) on the grinding vertical rod (401) until the grinding sheet is attached to the top surface of the pile head (14).

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