CN111663578B

CN111663578B - High strain detection device of prestressing force foundation pile

Info

Publication number: CN111663578B
Application number: CN202010583606.8A
Authority: CN
Inventors: 王本均; 侯会军; 罗在海; 曹龙
Original assignee: Sichuan Metallurgy Construction Engineering Quality Checking And Measuring Co ltd
Current assignee: Sichuan Metallurgy Construction Engineering Quality Checking And Measuring Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2024-09-17
Anticipated expiration: 2040-06-24
Also published as: CN111663578A

Abstract

The invention belongs to the technical field of detection of prestressed foundation piles, and discloses a high-strain detection device for prestressed foundation piles, which aims to solve the problems that the existing high-strain detection device has eccentric hammering and heavy hammers fall down easily to cause larger potential safety hazards. The invention fully utilizes the existing prestress foundation pile to fix the guide frame, and solves the problems that the guide frame cannot be stabilized and has larger potential safety hazard during field construction; meanwhile, the guide frame is fixed on the periphery of the prestressed foundation pile through the clamping device, and the vertical center line of the clamping device and the vertical center line of the heavy hammer are in the same straight line, so that the heavy hammer can be hammered on the center position of the prestressed foundation pile after freely falling, eccentric hammering is prevented, fitting analysis is conveniently carried out on an acquired speed curve and a force signal curve, the ultimate bearing capacity and pile body integrity of the prestressed foundation pile are accurately detected, and the accuracy of detecting the bearing capacity and pile body integrity of the prestressed foundation pile is improved.

Description

High strain detection device of prestressing force foundation pile

Technical Field

The invention belongs to the technical field of detection of prestressed foundation piles, and particularly relates to a high-strain detection device for a prestressed foundation pile.

Background

The high strain detection is a detection method for judging the vertical compression bearing capacity and the pile body integrity of a single pile, a heavy hammer (the weight is 1% -1.5% of the estimated ultimate bearing capacity of the single pile) is used for impacting the pile top in the experiment, so that the prestressed foundation pile generates enough penetration, the response of the pile body particle stress and the acceleration generated by the high strain detection is actually measured, and the vertical bearing capacity and the pile body integrity of the single pile are judged through fluctuation theory analysis. The pile top is impacted by the heavy hammer, so that enough relative displacement is generated between the pile and the soil, and the resistance of the soil around the pile and the supporting force of the pile end are fully excited. The existing main detection methods of the high strain of the prestressed foundation pile mainly comprise a Kaiss method (Case), a CAPWAPC method, a waveform fitting method, a wave equation method and the like.

The invention patent with the application number of 201811116398.X discloses a prestress foundation pile high-strain detection vehicle, which comprises a vehicle body, a heavy hammer, a spring acceleration device and a winch, wherein a rectangular opening is arranged at the tail end of a chassis of the vehicle body, rectangular guide frames are arranged at the left end and the right end of the rectangular opening, each guide frame comprises a cross beam and two vertically arranged support columns, an electrohydraulic telescopic rod is arranged at the top end of each support column, the electrohydraulic telescopic rods are connected with the two ends of the cross beam of the guide frame, a vertically downward round rod is arranged at the center of the cross beam, the spring acceleration device comprises an upper spring seat, a lower spring seat, a telescopic upright post and a spring, the centers of the upper spring seat and the lower spring seat are respectively provided with a first round through hole, the plane sizes of the upper spring seat and the lower spring seat are communicated firstly, the upper spring seat and the lower spring seat are fixedly connected in parallel in the horizontal direction through a plurality of telescopic upright posts, the first round through holes of the upper spring seat and the lower spring seat are connected with one another in the same straight line in the same vertical direction, a plurality of springs are connected between the upper spring seat and the lower spring seat, a first round bottom surface of the acceleration device is sleeved on the round beam, and the round bottom surface of the spring seat is installed on the cross beam.

For example, the patent of the invention with the application number 201520897072.0 discloses a special device for detecting the high strain of a prestress foundation pile, which comprises a pile head fixing device and a guide frame vertically arranged on the pile head fixing device, wherein a guide drop hammer rolling device, a combined hammer head, an automatic unhooking device and an electric lifting device are sequentially arranged in the guide frame, the electric lifting device is arranged at the top end of the guide frame, the automatic unhooking device is connected between the guide drop hammer rolling device and the automatic unhooking device, the combined hammer head is arranged in the guide frame and consists of a plurality of steel plates, a hammer bottom plate and a hammer top plate, the steel plates are paved on the hammer bottom plate, round holes which are positioned on the surfaces of each steel plate and the hammer bottom plate and have the same position are inserted into a connecting rod, the end part of the connecting rod is expanded to be tightly connected with the round hole of the hammer bottom plate, and the tail part of the connecting rod is transmitted into the hammer top plate to be fastened through a nut.

The invention patent with the application number of 201420873649.X discloses a prestress foundation pile high-strain detection hammering device, which comprises a guide frame, a hammer body arranged in the guide frame and a hook mechanism connected with the hammer body, wherein the guide frame comprises a hollow cone and a supporting frame extending along the vertical direction of the hollow cone, and the cross section area of the top end of the hollow cone is equal to the cross section area of the bottom end of the supporting frame; the hammer body moves up and down in the guide frame under the traction of the hook mechanism; the hook mechanism is respectively connected with a first steel wire rope and a second steel wire rope, wherein the first steel wire rope is connected with the crane, and the second steel wire rope is connected with an adjusting mechanism for triggering the unhooking of the hook machine head.

However, the conventional detection device has the following problems in use:

1. When a crane or a hoist is used for hoisting, the problem of eccentric hammering easily occurs, so that the data detected by the sensors on the left side and the right side of the prestressed foundation pile on the two sides have larger phase difference;

2. In the prior art, the lifting height of the heavy hammer is generally 20-50cm, which causes that the prestressed foundation pile is difficult to be driven, so that the penetration of the prestressed foundation pile is insufficient, and in order to achieve enough hammering force, the height of the heavy hammer has to be increased, however, along with the lifting of the height of the heavy hammer, the situation that a guide frame (or also called as a foot rest, a supporting frame and a fixing frame) is easy to fall down and fall down is caused, and huge potential safety hazards are brought to staff and instruments.

Disclosure of Invention

The invention provides the prestress foundation pile high-strain detection device, which aims to solve the problems that the existing high-strain detection device has eccentric hammering and the heavy hammer falls down easily to cause a larger potential safety hazard, and can ensure that the eccentric hammering does not occur in the hammering process, so that the sensor data at the two sides of the prestress foundation pile are more real, and the accuracy of the data is improved; meanwhile, the falling and falling of the heavy hammer can be prevented, and the falling of the guide frame (or also called as a foot rest, a supporting frame and a fixing frame) can not be caused, so that the safety of staff and related instruments and equipment is ensured.

In order to solve the technical problems, the invention adopts the following technical scheme:

The utility model provides a high strain detection device of prestressing force foundation, includes the leading truck, its characterized in that, the leading truck has set gradually clamping device, weight, automatic trip gear and the hoisting device that are used for centre gripping prestressing force foundation from supreme down, the weight can be dismantled with automatic trip gear and be connected, automatic trip gear's upper end is connected with the hoisting device who installs in the leading truck upper end, clamping device's vertical central line and weight vertical central line are on same straight line, the upper end of leading truck is provided with at least three first spherical articulated seat, and each first spherical articulated seat is not installed on same straight line, and the bulb of each first spherical articulated seat all is connected with adjustable length's first extensible member, and the bulb of first extensible member is connected with first spherical articulated seat, and the other end of first extensible member is connected with the bulb of second spherical articulated seat, second spherical articulated seat is connected with prestressing force foundation's pre-buried crab-bolt dismantlement.

In some embodiments, at least three third spherical hinge seats are arranged at the lower end of the guide frame, each third spherical hinge seat is not installed on the same straight line, and the third spherical hinge seat is detachably connected with the first telescopic piece or the second spherical hinge seat through a second telescopic piece with adjustable length.

In some embodiments, at least two guiding devices are arranged on the periphery of the heavy hammer, and guiding grooves which are matched with the guiding devices and are arranged along the vertical direction are arranged in the guiding frame, and the guiding devices extend into the guiding grooves.

In some embodiments, the guide means is a guide pulley or a guide block that extends into the guide slot.

In some embodiments, a sliding groove is formed in the guide frame, a sliding block is arranged in the sliding groove, the sliding block can slide in the sliding groove and can be locked in the sliding groove, and a baffle or a stop bar for contacting with a handle of the automatic unhooking device to trigger the heavy hammer to separate from the automatic unhooking device is arranged on the sliding block.

In some embodiments, the upper end and the lower end of the guide frame are respectively provided with a fixed plate, the fixed plate is provided with a chute, the chute is provided with a sliding block, the sliding block can slide in the chute and can be locked in the chute, and the first spherical hinging seat and the third spherical hinging seat are respectively and fixedly arranged on the sliding block at the upper end of the guide frame and the sliding block at the lower end of the guide frame.

In some embodiments, the first telescopic member and the second telescopic member each comprise a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are connected with an adjusting cylinder, the first connecting rod and the second connecting rod are connected with the adjusting cylinder through threads, and the length of the first connecting rod and the second connecting rod extending into the adjusting cylinder is adjusted through threads.

In some embodiments, the adjusting cylinder comprises a cylinder body, the cylinder body is provided with a through hole for accommodating the first connecting rod and the second connecting rod, two sections of first threaded sections and second threaded sections with opposite spiral directions are machined in the through hole, the first connecting rod is in threaded connection with the first threaded sections, and the second connecting rod is in threaded connection with the second threaded sections.

In some embodiments, the adjusting cylinder comprises a cylinder body, the cylinder body is provided with a through hole for accommodating the first connecting rod and the second connecting rod, two ends of the cylinder body are respectively connected with end covers in a rotating mode, and the end covers are provided with threaded holes in threaded connection with the first connecting rod and the second connecting rod.

In some embodiments, the adjusting cylinder comprises a cylinder body, the cylinder body is provided with a through hole for accommodating the first connecting rod and the second connecting rod, two ends of the cylinder body are respectively fixedly connected with end covers, the first connecting rod and the second connecting rod respectively penetrate through the end covers to extend into the cylinder body and are respectively provided with a first adjusting nut and a second adjusting nut, and the cylinder body is provided with a movable space for rotating the first adjusting nut and the second adjusting nut.

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

When the high-strain detection device for the prestressed foundation pile is used, the guide frame is fixed on the prestressed foundation pile (the prestressed foundation pile for high-strain detection) through the clamping device, so that the axis of the prestressed pipe pile and the axis of the free falling weight are on the same straight line, the first spherical hinging seat at the upper end of the guide frame is connected with the first telescopic piece, the first telescopic piece is connected with the first telescopic piece which is installed on the adjacent prestress, the first telescopic piece is connected with the second spherical hinging seat which is installed on the rest of the prestressed foundation pile (the prestressed foundation pile for high-strain detection), the upper end of the guide frame is fixed along different positions, the third spherical hinging seat at the lower end of the guide frame is finally connected with the second telescopic piece, and the second telescopic piece is connected with the second spherical hinging seat which is installed on the rest of the prestressed foundation pile or the first telescopic piece, and the lengths of the first telescopic piece and the second telescopic piece are adjusted, so that the first telescopic piece and the second telescopic piece are connected with the second telescopic piece, and the guide frame is ensured to safely and stably topple over of the guide frame, and the safety of a device are prevented. The invention fully utilizes the existing prestressed foundation piles (engineering piles) to fix the guide frame, and solves the problems that the guide frame cannot be stabilized and has larger potential safety hazard during field construction.

The guide frame is clamped on the periphery of the prestressed foundation pile through the clamping device, and the vertical center line of the clamping device and the vertical center line of the heavy hammer are positioned on the same straight line, so that the heavy hammer can be hammered on the center position of the prestressed foundation pile after freely falling, eccentric hammering is prevented, the numerical values of sensors on two sides of the prestressed foundation pile are very close (even the same), fitting analysis of an acquired speed curve and a force signal curve is facilitated, the ultimate bearing capacity and pile body integrity of the foundation pile are accurately detected, and the accuracy of bearing capacity and pile body integrity detection of the prestressed foundation pile is improved.

According to the invention, the guide device is arranged outside the heavy hammer, and the guide groove is arranged on the guide frame, so that the heavy hammer can be corrected in time when the heavy hammer is inclined in the falling process, and the eccentric hammering condition is further prevented.

According to the invention, the sliding groove is arranged on the guide frame, the sliding block is arranged in the sliding groove and can slide in the sliding groove and be locked in the sliding groove, and the baffle plate or the baffle bar used for being mutually contacted with the handle of the automatic unhooking device is arranged on the sliding block so as to trigger the heavy hammer to be separated from the automatic unhooking device, so that the position of the sliding block in the sliding groove (namely the height for the heavy hammer to fall is determined) can be firstly adjusted according to the condition of the prestressed foundation pile, when the lifting device drives the automatic unhooking device and the heavy hammer to rise, when the handle of the automatic unhooking device is contacted with the baffle plate or the baffle bar, the handle is pressed down under the action of the baffle plate or the baffle bar so that the heavy hammer is mutually separated from the automatic unhooking device, and the purpose of controlling the rising height of the heavy hammer is achieved.

According to the invention, the fixing plates are arranged at the upper end and the lower end of the guide frame, the sliding grooves are arranged on the fixing plates, the sliding grooves are provided with the sliding blocks, the first spherical hinging seat is arranged on the sliding blocks at the upper end of the guide frame, and the third spherical hinging seat is arranged on the sliding blocks at the lower end of the guide frame, so that the positions of the first spherical hinging seat and the third spherical hinging seat on the guide frame can be adjusted, and the fixing positions of the guide frame can be flexibly adjusted according to the distribution condition of the prestressed foundation piles (the prestressed foundation piles which are not subjected to high strain detection), thereby improving the fixing flexibility of the high strain detection device.

The first telescopic piece and the second telescopic piece realize adjustable change of length through adjustment among the adjusting cylinder, the first connecting rod and the second connecting rod, thereby being convenient for reasonably adjusting according to the distribution condition of the prestressed foundation piles (the prestressed foundation piles which are not subjected to high-strain detection) on the construction site, improving the use flexibility of the invention and meeting the stability of the detection device under different conditions.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is an enlarged partial pictorial view at A in FIG. 1;

FIG. 3 is an enlarged partial pictorial view at B in FIG. 1;

FIG. 4 is a schematic view of an embodiment of an automatic unhooking apparatus of the present invention;

FIG. 5 is a schematic diagram illustrating the connection of the first and second tie rods to an embodiment of the adjustment cylinder according to the present invention;

FIG. 6 is a schematic diagram illustrating the connection of the first and second tie rods to an embodiment of the adjustment cylinder according to the present invention;

FIG. 7 is a schematic illustration of the connection between the end cap and the snap ring of FIG. 6;

FIG. 8 is a schematic diagram illustrating the connection of the first and second tie rods to an embodiment of the adjustment cylinder according to the present invention;

FIG. 9 is a schematic view of an embodiment of a first link and a second link of the present invention;

FIG. 10 is a schematic view of an embodiment of a first link and a second link of the present invention;

FIG. 11 is a schematic view of a clamping device according to an embodiment of the present invention;

FIG. 12 is a schematic view of an embodiment of a clamping device according to the present invention;

FIG. 13 is a schematic view of an embodiment of a clamping device according to the present invention;

The marks in the figure: 1. the device comprises a frame, 2, clamping devices, 21, left arc blocks, 22, right arc blocks, 23, adjusting screws, 24, fixing rings, 25, adjusting end covers, 26, through holes, 3, heavy weights, 4, automatic unhooking devices, 41, lifting lugs, 42, hanging plates, 43, handles, 44, wedge-shaped press blocks, 45, pin shafts, 46, left clamping blocks, 47, right clamping blocks, 48, clamping grooves, 5, lifting devices, 51, winders, 52, steel ropes, 6, first spherical hinge seats, 61, fixing plates, 62, sliding grooves, 63, sliding blocks, 64, strip-shaped grooves, 65, lifting bolts, 7 and first telescopic members, 71, first connecting rod, 711, first connecting section, 712, second connecting section, 713, connecting rope, 72, adjusting cylinder, 721, cylinder, 722, through hole, 723, first threaded section, 724, second threaded section, 725, end cover, 726, snap ring, 727, clamping groove, 728, first adjusting nut, 729, second adjusting nut, 7210, movable space, 73, second connecting rod, 8, second spherical hinge seat, 9, third spherical hinge seat, 10, second telescopic member, 11, baffle or baffle bar, 1101, mounting plate, 1102, sliding groove, 1103, sliding block, 1104, guiding groove.

Detailed Description

The present invention is further described below in conjunction with embodiments, which are merely some, but not all embodiments of the present invention. Based on the embodiments of the present invention, other embodiments that may be used by those of ordinary skill in the art without making any inventive effort are within the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of describing the present invention and simplifying the description/, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, the high strain detection device for the prestressed foundation pile comprises a guide frame 1 (or called a fixing frame and a supporting frame), wherein a clamping device 2, a heavy hammer 3, an automatic tripping device 4 and a lifting device 5 for clamping the prestressed foundation pile are sequentially arranged on the guide frame 1 from bottom to top, the heavy hammer 3 is detachably connected with the automatic tripping device 4, the upper end of the automatic tripping device 4 is connected with the lifting device 5 arranged at the upper end of the guide frame 1, the vertical center line of the clamping device 2 and the vertical center line of the heavy hammer 3 are on the same straight line, at least three first spherical hinge seats 6 are arranged at the upper end of the guide frame 1, each first spherical hinge seat 6 is not arranged on the same straight line, the ball head of each first spherical hinge seat 6 is connected with a first telescopic piece 7 with an adjustable length, one end of the first telescopic piece 7 is connected with the ball head of the first spherical hinge seat 6, the other end of the first telescopic piece 7 is connected with the ball head of a second spherical hinge seat 8, and the second spherical hinge seat 8 is detachably connected with an anchor bolt of the prestressed foundation pile.

The guide frame 1 of the invention can adopt a columnar structure formed by angle steel welding or threaded connection, and the guide frame 1 can be in a cuboid shape, or a hexagonal prism, an eight prism or a polygonal prism with the number of sides being more than 8 and composed of even number of sides. In some embodiments, one or more first spherical hinge seats 6 are installed at the upper end of each side of the guide frame, for example, when the guide frame is in a hexagonal prism shape, at least one first spherical hinge seat 6 is installed at each of six sides of the guide frame, and when the guide frame is in a rectangular parallelepiped shape, at least one first spherical hinge seat 6 is installed at each of four sides of the guide frame, thereby being fixed from various directions of the guide frame 1. In order to facilitate the reduction of the manufacturing cost of the guide frame 1 during the construction, the guide frame is preferably designed in a rectangular parallelepiped shape so that the guide frame 1 capable of accommodating the weight 3, the clamping device 2, and the like can be manufactured using less material.

As a preferred mode of the invention, at least three first spherical hinging seats 6 are arranged on the guide frame 1, and the three first spherical hinging seats 6 are not in the same straight line any more, so that the three first spherical hinging seats 6 form a triangle shape, and are respectively fixed on prestressed foundation piles at different positions along different directions through the first spherical hinging seats 6, the first telescopic pieces 7 and the second spherical hinging seats 8, thereby guaranteeing the installation stability of the guide frame 1.

The clamping device 2 according to the present invention is a prestressed foundation pile for clamping a horse for high strain detection, and the second spherical hinge base 8 is mounted on the rest of the prestressed foundation piles, and since the number of the prestressed foundation piles is plural in one construction site, the second spherical hinge base 8 is mounted on the prestressed foundation piles, so that the condition of the construction site can be fully utilized to fix the guide frame 1.

The lifting device 5 of the invention can adopt a structure of a winch 51 and a steel rope 52, namely, the winch is arranged at the upper end of the guide frame 1, the end part of the steel rope 52 wound on the winch 51 is connected with the automatic unhooking device 4, and the automatic unhooking device 4 is connected with the heavy hammer 3, so that the heavy hammer is lifted through the winch 51, and the high strain detection of the prestressed foundation pile is facilitated.

The lifting device 5 of the present invention can also drive the automatic unhooking device 4 and the heavy hammer 3 to lift by using a hydraulic cylinder, and the description is omitted here. Preferably, in order to adapt to the field severe construction environment, the hoisting device 5 preferably adopts a winch with simple structure and reliable performance.

In some embodiments, at least three third spherical hinge seats 9 are disposed at the lower end of the guide frame 1, each third spherical hinge seat 9 is not mounted on the same straight line, and the third spherical hinge seat 9 is detachably connected with the first telescopic member 7 or the second spherical hinge seat 8 through a second telescopic member 10 with adjustable length, that is, one end of the second telescopic member can be connected to the first telescopic member, the other end of the second telescopic member can be connected to the second spherical hinge seat, and the mounting stability of the guide frame 1 can be further improved through the third spherical hinge seat 9 and the second telescopic member 10. Wherein, spherical articulated seat (including first spherical articulated seat 6, second spherical articulated seat 8 and third spherical articulated seat 9) belongs to prior art product, and the person skilled in the art can understand and understand, and this is not repeated here.

Wherein, the installation mode of the third spherical joint seat 9 is the same as that of the first spherical hinge seat 6, and at least one third spherical hinge seat can be installed on each surface of the lower end of the guide frame. The third spherical hinge seat 9 may be installed directly under the first spherical hinge seat 6, and the installation position of the third spherical hinge seat 9 may be spaced apart from the installation position of the first spherical hinge seat 6.

Referring to fig. 2, in some embodiments, the upper end and the lower end of the guide frame 1 are respectively provided with a fixing plate 61, the fixing plate 61 is provided with a sliding groove 62, the sliding groove 62 is provided with a sliding block 63, the sliding block 63 can slide in the sliding groove 62 and can be locked in the sliding groove 62, and the first spherical hinge seat 6 and the third spherical hinge seat 9 are respectively and fixedly installed on the sliding block 63 at the upper end of the guide frame 1 and the sliding block 63 at the lower end of the guide frame 1. The position of the first spherical hinging seat and the position of the third spherical hinging seat on the guide frame can be adjusted, so that the fixing position of the guide frame can be flexibly adjusted according to the distribution condition of the prestressed foundation piles (the prestressed foundation piles which are not subjected to high-strain detection), and the fixing flexibility of the high-strain detection device is improved.

In some embodiments, the fixing plates 61 on two sides of the sliding groove 62 are provided with a bar groove 64, the upper end surface of the sliding groove 63 covers one section of the bar groove 64, when locking is needed, the locking screw rod sequentially passes through the bar groove 64 and the sliding block 63 and is provided with a locking nut, and the position of the sliding block 63 on the sliding groove 62 is fixed through the locking screw rod and the locking nut.

In some embodiments, a plurality of through holes may be formed on the fixing plates 61 on both sides of the sliding groove 62, and the locking screw sequentially passes through the through holes and the sliding block 63 and is provided with a locking nut, so that the position of the sliding block 63 on the sliding groove 62 is fixed through the locking screw and the locking nut.

In some embodiments, to improve the stability of the connection of the slider 63 with the sliding groove 62, the sliding groove 62 is designed as a dovetail groove, thereby ensuring a stable connection of the slider 63.

In some embodiments, the guide frame 1 is provided with a sliding groove, a sliding block is arranged in the sliding groove, the sliding block can slide in the sliding groove and can be locked in the sliding groove, and a baffle or a stop bar 11 for contacting with a handle of the automatic unhooking device 4 to trigger the heavy hammer to separate from the automatic unhooking device 4 is arranged on the sliding block.

Referring to fig. 3, in some embodiments, a mounting plate 1101 is mounted on the guide frame 1, a sliding groove 1102 is vertically formed on the mounting plate 1101, a sliding block 1103 is matched with the sliding groove 1102, and a baffle or stop 11 is mounted on the sliding block 1103, so that the height position of the baffle or stop 11 is adjusted. According to the invention, the sliding groove is arranged on the guide frame, the sliding block is arranged in the sliding groove and can slide in the sliding groove and be locked in the sliding groove, and the baffle plate or the baffle bar used for being mutually contacted with the handle of the automatic unhooking device is arranged on the sliding block so as to trigger the heavy hammer to be separated from the automatic unhooking device, so that the position of the sliding block in the sliding groove (namely the height for the heavy hammer to fall is determined) can be firstly adjusted according to the condition of the prestressed foundation pile, when the lifting device drives the automatic unhooking device and the heavy hammer to rise, when the handle of the automatic unhooking device is contacted with the baffle plate or the baffle bar, the handle is pressed down under the action of the baffle plate or the baffle bar so that the heavy hammer is mutually separated from the automatic unhooking device, and the purpose of controlling the rising height of the heavy hammer is achieved.

In some embodiments, a plurality of through holes or bar holes may be formed in the mounting plate 1101, and the sliding block is provided with a locking screw and a locking nut, wherein the locking screw sequentially passes through the through holes or bar holes in the mounting plate 1101 and is fastened to the locking nut, thereby fastening the sliding block 1103 to the sliding groove 1102.

Referring to fig. 4, in some embodiments, at least two guiding devices are disposed at the periphery of the weight 3, and guiding grooves 1104 that are matched with the guiding devices and disposed along the vertical direction are disposed inside the guiding frame, and the guiding devices extend into the guiding grooves 1104. When the weight tilts in the falling process, the weight can be corrected in time through the interaction of the guide device and the guide groove 1104, so that the eccentric hammering condition is further prevented.

In some embodiments, the guide means is a guide pulley 31 or a guide block, which guide pulley 31 or guide block extends into the guide groove 1104. Wherein, the guide groove 1104 is arranged on the mounting plate 1101, and the length of the guide groove 1104 is adapted to the falling weight height of the heavy weight.

The width of the guide groove 1104 should be greater than the width of the guide pulley 31 so that the guide pulley 31 does not contact with the side wall of the guide groove 1104, and the guide pulley 31 may or may not contact with the bottom surface of the guide groove 1104.

In some embodiments, the guide means can also be a guide block, which does not contact the side wall or bottom surface of the guide channel 1104 when the weight is free falling vertically, and only contacts the guide channel to adjust and correct the weight when the weight is tilted.

In some embodiments, the upper end and the lower end of the two sides of the weight are provided with guide pulleys or guide blocks, or the two sides of the upper end of the weight 3 are provided with guide pulleys and guide blocks.

In some embodiments, a plurality of guide pulleys or guide blocks may be provided inside the guide frame 1, that is, the guide pulleys or guide blocks are mounted on the mounting plate 1101, and the guide grooves 1104 are opened on the outer circumference of the weight.

In some embodiments, the guiding device can also be a guiding hole formed on the heavy hammer 3, and a guiding rod which is mutually matched with the through hole and is vertically arranged is arranged on the guiding frame 1, namely the guiding hole and the guiding rod form the guiding device together; or a guide rod is arranged on the heavy hammer, a guide block is arranged on the guide frame 1, and a guide hole matched with the guide rod is formed in the guide block. Wherein the number of the guide holes is the same as the number of the guide bars.

The automatic unhooking device taught by the present invention belongs to the prior art products and will be understood and appreciated by those skilled in the art. Referring to fig. 4, there is shown a schematic structural diagram of an automatic unhooking device 4, where the automatic unhooking device 4 includes a lifting lug 41, an upper end of the lifting lug 41 is connected with a lifting device 5, and when the lifting device 5 is a winch 51, a steel rope 52 wound on the winch 51 is fixedly connected with the lifting lug 41; the lower extreme fixedly connected with hanger plate 42 of lug 41, the lower extreme of hanger plate is connected with left grip block 46 and right grip block 47 respectively through shaft 45, the lower extreme of left grip block 46 and right grip block 47 is formed with and is used for grip groove 48, the upper end of weight 3 is through steel cable or couple centre gripping in grip groove 48, still be connected with handle 43 through the shaft on hanger plate 42 of left grip block 46 and right grip block 47 top, it has wedge briquetting 44 to articulate on the handle, wedge briquetting 44 and handle 43's tie point is located on the perpendicular bisector between left grip block 46 and the right grip block 47. The working process of the automatic unhooking device 4 is as follows: during the lifting process of the lifting device 5, the left clamping block 46 and the right clamping block 47 cannot rotate due to the action of the wedge-shaped pressing block 44, so that the heavy hammer is only clamped and driven to lift through the clamping groove 48; when the handle 43 of the automatic unhooking device 4 moves to the baffle or the stop bar 11, the baffle or the stop bar 11 stops the handle 43 to rotate, and the wedge-shaped pressing block 44 is continuously pressed down, so that the wedge-shaped pressing block 44 enters into a containing cavity formed between the left clamping block 46 and the right clamping block 47, the wedge-shaped pressing block 44 does not squeeze the left clamping block and the right clamping block, and under the action of the dead weight of the heavy hammer, the left clamping block 46 and the right clamping block 47 automatically rotate along the pin shaft 45, so that the clamping groove 48 is opened, and the heavy hammer is separated from the clamping groove 48 to do free falling motion.

The automatic unhooking device itself belongs to the prior art, and a person skilled in the art can understand and understand the working process and principle thereof, for example, the automatic unhooking device may also adopt the structure of the unhooking device disclosed in the application number 201720853355.4, and the structure of the automatic unhooking device is not described herein.

In some embodiments, the first telescopic member 7 and the second telescopic member 10 each comprise a first connecting rod 71 and a second connecting rod 73, the first connecting rod 71 and the second connecting rod 72 are connected with an adjusting cylinder 72, the first connecting rod 71 and the second connecting rod 73 are connected with the adjusting cylinder 72 in a threaded manner, and the length of the first connecting rod 71 and the second connecting rod 73 extending into the adjusting cylinder 72 is adjusted through threads, so that the length of the first telescopic member 7 and the second telescopic member 10 is adjusted. The first telescopic piece and the second telescopic piece realize adjustable change of length through adjustment among the adjusting cylinder, the first connecting rod and the second connecting rod, thereby being convenient for reasonably adjusting according to the distribution condition of the prestressed foundation piles (the prestressed foundation piles which are not subjected to high-strain detection) on the construction site, improving the use flexibility of the invention and meeting the stability of the detection device under different conditions.

Referring to fig. 5, in some embodiments, the adjusting cylinder 72 includes a cylinder 721, the cylinder 721 is provided with a through hole 722 for accommodating the first link 71 and the second link 73, a first threaded section 723 and a second threaded section 724 with opposite screw directions are machined in the through hole 722, the first link 71 is in threaded connection with the first threaded section 723, and the second link 73 is in threaded connection with the second threaded section 724. In this embodiment, by directly providing two threads with opposite screw directions, when the barrel 721 is rotated in one direction, the lengths of the first link 71 and the second link 73 extending into the barrel 721 can be adjusted, for example, when the first link moves toward the inside of the barrel, the second link also moves toward the inside of the barrel; when the first connecting rod moves along the direction away from the cylinder, the second connecting rod also moves along the direction away from the cylinder, so that the length of the first telescopic piece 7 and the second telescopic piece 10 is adjusted; the embodiment has the characteristic of convenient adjustment.

Referring to fig. 6, in some embodiments, the adjusting cylinder 72 includes a cylinder 721, the cylinder 721 is provided with a through hole 722 for accommodating the first link 71 and the second link 73, two ends of the cylinder 721 are rotatably connected with end caps 725, and the end caps 725 are provided with threaded holes for screwing with the first link 71 and the second link 731. In this embodiment, the end caps 725 are rotatably connected to both sides of the cylinder 721, so that the lengths of the first link 71 and the second link 73 extending into the cylinder 721 can be adjusted by rotating the end caps 725 at both ends of the cylinder 721, respectively, thereby achieving the adjustment of the lengths of the first expansion member 7 and the second expansion member 10, which has the characteristic of flexible adjustment.

Referring to fig. 7, in this embodiment, a clip 726 may be disposed at both ends of the barrel 721, a clip groove 727 is formed between the clip 726 and the barrel 721, and a portion of the end cap is clamped in the clip groove 727, thereby limiting the end cap 725. When in installation, the end cover is firstly placed at the end part of the cylinder 721, then the snap ring 726 is buckled, and the snap ring 726 is connected with the cylinder 721 through bolts, so that the end cover 725 can rotate and limit under the action of the cylinder and the snap ring.

Referring to fig. 8, in some embodiments, the adjusting cylinder 72 includes a cylinder 721, the cylinder 721 is provided with a through hole 722 for accommodating the first link 71 and the second link 73, two ends of the cylinder 721 are fixedly connected with end covers 725, the first link 71 and the second link 73 respectively penetrate through the end covers 725 to extend into the cylinder 721 and are respectively provided with a first adjusting nut 728 and a second adjusting nut 729, and the cylinder 721 is provided with a movable space 7210 for rotating the first adjusting nut 728 and the second adjusting nut 729.

In the use process of the adjusting cylinder 72 in this example, the first connecting rod and the second connecting rod are first connected with the first adjusting nut 728 and the second adjusting nut 729 in a threaded manner, then extend into the movable space 7210 in the cylinder 721, then the end cover 725 is fastened and connected with the cylinder 721 through bolts, and when the lengths of the first connecting rod and the second connecting rod extending into the cylinder need to be adjusted, the first adjusting nut 728 and the second adjusting nut 729 are rotated, so that the lengths of the first telescopic member 7 and the second telescopic member can be adjusted.

Referring to fig. 9, in some embodiments, the first link 71 and the second link 73 may be a long rod, one end of which is fixedly connected with the ball heads of the ball-shaped hinge seats (the first ball-shaped hinge seat, the second ball-shaped hinge seat and the third ball-shaped hinge seat) through rivets, screws or welding, and the other end of which is provided with a screw thread section for screw-coupling with the adjustment cylinder 72.

Referring to fig. 10, in some embodiments, the first and second links 71 and 73 may each include a first connection section 711 and a second connection section 712, and a connection rope 713 is connected between the first connection section 711 and the second connection section 712, wherein the first connection section 711 is fixedly connected with a ball head of a ball-shaped hinge seat (the first, second and third ball-shaped hinge seats) by means of rivets, screws or welding, and the second connection section 712 is screwed with the adjustment cylinder 72. The structure of this embodiment can realize the adjustment of the length by adjusting the length of the second connecting section 712 extending into the adjusting cylinder 72, and can realize the adjustment of the length by adjusting the length of the connecting rope 713, and is convenient for transportation and storage.

In some embodiments, the first telescopic member 7 and the second telescopic member 10 may also be configured by using an electric telescopic rod, a hydraulic cylinder or the like to adjust the lengths of the first telescopic member and the second telescopic member.

Referring to fig. 11, in some embodiments, the clamping device 2 includes a left arc block 21 and a right arc block 22, the arc radii of the left arc block 21 and the right arc block 22 are mutually adapted to the outer diameter of the prestressed foundation pile, the left arc block 21 and the right arc block 22 form a whole circle to carry out cladding and clamping on the prestressed foundation pile, the left arc block 21 and the right arc block 22 are both connected with an adjusting screw 23, a fixing ring 24 is installed on the inner side of the guide frame 1, a containing cavity is formed on the fixing ring 24, one end of an adjusting end cover 25 is placed in the containing cavity of the fixing ring and can rotate in the containing cavity, and a threaded through hole mutually adapted to the adjusting screw 23 is formed in the middle of the adjusting end cover 25. When the clamping device of the embodiment is used, the clamping device is firstly arranged at the periphery of the prestress foundation pile, then the adjusting end cover 25 is gradually rotated, so that the left arc-shaped block 21 and the right arc-shaped block 22 move towards the prestress foundation pile until the left arc-shaped block 21 and the right arc-shaped block 22 clamp the prestress foundation pile only, and finally the detachable connection between the left arc-shaped block 21 and the right arc-shaped block 22 is realized through bolts and nuts and buckles, so that the guide frame and the prestress foundation pile are firmly realized through the clamping device.

According to the invention, the clamping device 2 is arranged, so that the installation stability of the guide frame 1 can be improved, and meanwhile, the vertical center line of the clamping device and the vertical center line of the heavy hammer are on the same straight line, so that eccentric hammering is prevented.

In some embodiments, the guide frame 1 is provided with a through hole 26 for the movement of the adjusting screw 23, so as to meet the movement space required by the movement of the adjusting screw 23 towards the prestressed foundation pile or away from the prestressed foundation pile.

This embodiment differs from the embodiment taught in fig. 11 by combining fig. 12 in that: the left and right arc blocks 21 and 22 cannot form a complete circle, and the left and right arc blocks 21 and 22 can clamp only a portion of the prestressed foundation pile. In this embodiment, the radius of the circular arc of the left and right arc blocks 21 and 22 may be larger than the outer diameter of the prestressed foundation pile so as to be able to clamp the prestressed foundation piles of different sizes, improving the practicality of the present invention.

This embodiment differs from the embodiment taught in fig. 11 by referring to fig. 13 in that: the left arc-shaped block 21 is fixedly connected with the guide frame 1, and only the right arc-shaped block 22 is connected with the adjusting screw 23, so that the device can ensure that the vertical center line of the clamping device and the vertical center line of the heavy hammer are on the same straight line through the left arc-shaped block 21 as a positioning block, and has the characteristics of convenience in installation and positioning.

The foregoing is not intended to limit the invention in any way or in any way, but it should be noted that modifications and additions to the method of the invention may be made by those skilled in the art without departing from the scope of the invention. Equivalent changes, modifications and variations to those skilled in the art can be made by the foregoing disclosed technology without departing from the spirit and scope of the present invention, and it is intended that the present invention is not limited to the specific details of this invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. The high strain detection device for the prestressed foundation pile comprises a guide frame and is characterized in that a clamping device, a heavy hammer, an automatic tripping device and a lifting device for clamping the prestressed foundation pile are sequentially arranged on the guide frame from bottom to top, the heavy hammer is detachably connected with the automatic tripping device, the upper end of the automatic tripping device is connected with the lifting device arranged at the upper end of the guide frame, the vertical center line of the clamping device and the vertical center line of the heavy hammer are in the same straight line, at least three first spherical hinge seats are arranged at the upper end of the guide frame, the first spherical hinge seats are not arranged on the same straight line, the ball head of each first spherical hinge seat is connected with a first telescopic piece with adjustable length, one end of the first telescopic piece is connected with the ball head of the first spherical hinge seat, the other end of the first telescopic piece is connected with the ball head of the second spherical hinge seat, and the second spherical hinge seat is detachably connected with the embedded anchor bolt of the prestressed foundation pile; the lower end of the guide frame is provided with at least three third spherical hinging seats, each third spherical hinging seat is not arranged on the same straight line, and the third spherical hinging seat is detachably connected with the first telescopic piece or the second spherical hinging seat through a second telescopic piece with adjustable length;

The periphery of the heavy hammer is provided with at least two guide devices, the guide frame is internally provided with guide grooves which are mutually matched with the guide devices and are arranged along the vertical direction, and the guide devices extend into the guide grooves;

The upper end and the lower extreme of leading truck are installed the fixed plate respectively, the spout has been seted up to the fixed plate, the slider has been furnished with to the spout, the slider can slide in the spout and can lock in the spout, first spherical articulated seat and the slider of third spherical articulated seat fixed mounting respectively on the slider of leading truck upper end and the slider of leading truck lower extreme.

2. The device of claim 1, wherein the guide means is a guide pulley or a guide block extending into the guide slot.

3. The device for detecting the high strain of the prestressed foundation pile according to claim 1 or 2, wherein the guide frame is provided with a sliding groove, a sliding block is arranged in the sliding groove, the sliding block can slide in the sliding groove and can be locked in the sliding groove, and a baffle or a baffle strip for contacting with a handle of the automatic unhooking device to trigger the heavy hammer to separate from the automatic unhooking device is arranged on the sliding block.

4. The device for detecting the high strain of the prestressed foundation pile according to claim 1, wherein the first telescopic member and the second telescopic member each comprise a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are connected with an adjusting cylinder, the first connecting rod and the second connecting rod are connected with the adjusting cylinder through threads, and the length of the first connecting rod and the second connecting rod extending into the adjusting cylinder is adjusted through the threads.

5. The device for detecting the high strain of the prestressed foundation pile according to claim 4, wherein the adjusting cylinder comprises a cylinder body, a through hole for accommodating the first connecting rod and the second connecting rod is formed in the cylinder body, a first threaded section and a second threaded section with opposite screw directions are processed in the through hole, the first connecting rod is in threaded connection with the first threaded section, and the second connecting rod is in threaded connection with the second threaded section.

6. The device for detecting the high strain of the prestressed foundation pile according to claim 4, wherein the adjusting cylinder comprises a cylinder body, the cylinder body is provided with a through hole for accommodating the first connecting rod and the second connecting rod, two ends of the cylinder body are respectively and rotatably connected with end covers, and the end covers are provided with threaded holes in threaded connection with the first connecting rod and the second connecting rod.

7. The device for detecting the high strain of the prestressed foundation pile according to claim 4, wherein the adjusting cylinder comprises a cylinder body, the cylinder body is provided with a through hole for accommodating the first connecting rod and the second connecting rod, two ends of the cylinder body are respectively fixedly connected with end covers, the first connecting rod and the second connecting rod respectively penetrate through the end covers to extend into the cylinder body and are respectively provided with a first adjusting nut and a second adjusting nut, and the cylinder body is provided with a movable space for rotating the first adjusting nut and the second adjusting nut.