CN220978138U - Single pile vertical pulling-resistant static load test detection anchorage counter-force device - Google Patents

Abstract

The utility model provides a single pile vertical anti-pulling static load test detection anchorage reaction device which comprises an upper grid plate clamp, a lower grid plate clamp, reaction beams and jacks, wherein the upper grid plate clamp is connected with the lower grid plate clamp through pull rods, the reaction beams are arranged between the upper grid plate clamp and the lower grid plate clamp, the jacks are arranged between the reaction beams and the upper grid plate clamp, the two ends of the lower part of each reaction beam are respectively provided with a height adjusting component, each height adjusting component comprises a sliding block and a threaded lifting column arranged at the bottom of the sliding block, the sliding blocks are in sliding connection with the reaction beams through sliding rails, and at least two threaded lifting columns are uniformly arranged at the bottom of the sliding block. The device has the characteristics of simple structure and convenient installation and disassembly, can well ensure that all steel bars of the pile reinforcement cage can be uniformly stressed, and the heights of the two ends of the counter-force beam can be adjusted, so that the level of the counter-force beam is ensured, and the whole detection device is more convenient and quick to install.

Description

Single pile vertical pulling-resistant static load test detection anchorage counter-force device

Technical Field

The utility model relates to the technical field of building engineering detection, in particular to an anchor counterforce detection device for a single pile vertical anti-pulling static load test.

Background

At present, when a domestic detection mechanism detects a single pile vertical pulling-resistant static load test, a common detection method comprises a counter-force reinforced semicircular steel pier welding method, an inner steel cylinder and outer steel cylinder steel bar welding method and the like. The device operation principle and the disadvantages of the two methods are briefly described below.

1. And a counter-force reinforced semicircular steel pier welding method is used. The working principle of the equipment is as follows: a girder is erected above buttresses on two sides of a pulling-resistant test pile, a jack is arranged in the middle of a girder top, and a counterforce reinforced semicircular steel pier is arranged on the jack. Before the test, a plurality of extension bars (generally with the same diameter as the longitudinal bars of the pile body) with the length of about 3m are cut, one ends of the extension bars are respectively welded with pile top bars outside the projection of the main beam in a lap joint mode, the other ends of the extension bars are sequentially welded on the side faces of the semicircular steel piers above the jack one by one, after the test is finished, the two ends of the extension bars are respectively burned and cut from the side faces of the semicircular steel piers and the pile tops one by one, and when the next pile test is carried out, the steps are carried out again. Working disadvantages: the test method has the defects that 3-6 pile reinforcement cage steel bars at the two symmetrical sides of the tested pile at the lower end of the main beam can not be welded on the side face of the semicircular steel pier above the jack in an extending mode due to the obstruction of the counter-force main beam above the tested pile top, and can not meet the condition that all steel bars of the pile reinforcement cage bear tensile force, particularly, under the condition that the designed reinforcement tensile force calculation is limited, the maximum loading pulling resistance required by the test can not be met, so that the test of the single pile pulling-resistant static load test fails.

2. And (3) welding the steel bars of the inner steel cylinder and the outer steel cylinder. The working principle of the equipment is as follows: the device comprises two inner steel cylinders and two outer steel cylinders, wherein the two inner steel cylinders are arranged up and down symmetrically and leave the height difference of the girder, and the opposite surfaces of the upper inner steel cylinder and the lower inner steel cylinder are respectively sealed by a steel plate. And a plurality of steel bars are welded on two sides of the two inner steel cylinders respectively and used for symmetrically positioning the two inner steel cylinders, the outer sides of the two inner steel cylinders are respectively sleeved with a so-called outer steel cylinder with the same height, and the outer walls of the outer steel cylinders are welded with the steel bars. Working disadvantages: when the reinforcement cage of the site pile is used for pouring concrete, the reinforcement cage is extruded and deformed by the concrete and is not in an absolute circular shape due to construction influence. Therefore, the steel bars welded on the steel cylinder are not vertical, individual steel bars are likely to be in a diagonal tension state, the whole test device is easy to bear uneven force, and in the pile pulling-resistant static load test detection loading process, the pulling-resistant force is gradually increased along with staged loading, so that the steel bars are separated from the steel cylinder, and the single pile pulling-resistant static load test fails to detect.

Therefore, the existing single pile vertical anti-pulling static test detection device cannot meet the problems that all steel bars of a pile reinforcement cage bear tensile force or are stressed unevenly, detection is easy to fail and the like, so that the design of the single pile vertical anti-pulling static test detection anchor counter-force device which can uniformly bear the tensile force for all the steel bars of the pile reinforcement cage is a technical problem to be solved urgently by the technicians in the field.

Disclosure of utility model

The utility model aims to provide an anchor counterforce detection device for a single pile vertical anti-pulling static load test, which has the characteristics of simple structure and convenient installation and disassembly, can well ensure that all steel bars of a pile reinforcement cage to be detected can be uniformly stressed, can adjust the heights of two ends of a counterforce beam, ensures the level of the counterforce beam, and ensures that the whole detection device is more convenient and faster to install.

Embodiments of the present utility model are implemented as follows:

The utility model provides a single pile vertical anti-pulling static load test detection anchorage reaction device which comprises an upper grid plate clamp, a lower grid plate clamp, reaction beams and jacks, wherein the upper grid plate clamp is connected with the lower grid plate clamp through pull rods, the reaction beams are arranged between the upper grid plate clamp and the lower grid plate clamp, the jacks are arranged between the reaction beams and the upper grid plate clamp, height adjusting assemblies are arranged at two ends of the lower part of each reaction beam, each height adjusting assembly comprises a sliding block and threaded lifting columns arranged at the bottom of each sliding block, the sliding blocks are connected with the corresponding reaction beams in a sliding mode through sliding rails, and at least two threaded lifting columns are uniformly arranged at the bottom of each sliding block.

Further, the upper grid plate clamp comprises an outer square grid plate and an inner circular grid plate, and the inner circular grid plate is fixedly arranged in the middle of the outer square grid plate through welding.

Further, the lower grating plate clamp is a round grating plate, and a concentric reinforcing ring is arranged in the middle of the round grating plate.

Further, threads are arranged at two ends of the pull rod.

Furthermore, one end of the pull rod is provided with a triangular boss, and the other end of the pull rod is provided with threads.

Further, a backing plate is arranged between the jack and the upper grid plate clamp.

Further, four threaded lifting columns are uniformly arranged at the bottom of the sliding block, and adjusting screw heads are arranged at the lower ends of the threaded lifting columns.

Furthermore, lifting lugs are arranged at the ends of the upper grid plate clamp and the lower grid plate clamp.

Compared with the prior art, the embodiment of the utility model has at least the following advantages or beneficial effects:

1) According to the single pile vertical anti-pulling static load test detection anchorage reaction device, the upper grid plate clamp and the lower grid plate clamp are respectively arranged on the upper side and the lower side of the reaction beam, reserved steel bars of a pile reinforcement cage can all penetrate through the lower grid plate clamp at the bottom, the reserved steel bars are all uniformly fixed on the lower grid plate clamp by adopting an anchorage device, the lower grid plate clamp is fixedly connected with the upper grid plate clamp by adopting a pull rod, and when a jack is lifted upwards, the upper grid plate clamp drives the lower grid plate clamp, so that all reserved steel bars of the pile reinforcement cage are subjected to upward pulling force, and the single pile vertical anti-pulling static load test detection is stably and reliably realized;

2) The whole device has a simple structure, the upper grating plate clamp and the lower grating plate clamp are connected by adopting a pull rod bolt, and the lower grating plate clamp and the reserved steel bars of the pile reinforcement cage are fixedly connected by adopting an anchorage device, so that the whole detection device can be repeatedly used for a plurality of times, and the installation of the whole detection device is more convenient and quicker;

3) The height adjusting components arranged at two ends of the lower part of the two ends of the counter-force beam can adjust the height of the two ends of the counter-force beam, and simultaneously can slidably adjust the left and right positions of the counter-force beam on the counter-force beam, so that the problem that the adjustment level of the counter-force beam is difficult due to uneven cement buttresses placed at the lower end of the existing counter-force beam is solved, and meanwhile, the counter-force beam adjusting components are more widely applicable to complex field environments, can well play roles in supporting and adjusting the level of the counter-force beam to cement buttresses with different intervals, and enable the single pile stress of the whole test to be uniform.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic illustration of the connection of an upper grid plate clip to a lower grid plate clip in accordance with the present utility model;

FIG. 3 is a front view of the structure of the reaction beam of the present utility model;

FIG. 4 is a front view of the structure of the tie rod of the present utility model;

FIG. 5 is a schematic view of the structure of the lifting lug of the upper grid plate clamp of the present utility model;

Icon: 1. a grid plate upper clamp; 11. an outer square grid plate; 12. an inner circular grid plate; 2. a lower grid plate clamp; 21. round grating plates; 22. reinforcing the circular ring; 3. a reaction beam; 31. a slide rail; 4. a jack; 5. a pull rod; 51. a thread; 52. triangular boss; 6. a height adjustment assembly; 61. a slide block; 62. a threaded lifting column; 63. adjusting the screw head; 7. lifting lugs.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiment one: as shown in fig. 1-3 and 5, this embodiment provides a vertical anti-pulling static test of single pile detects ground tackle counterforce device, including last grid plate anchor clamps 1, lower grid plate anchor clamps 2, counterforce crossbeam 3 and jack 4, go up and connect through pull rod 5 between grid plate anchor clamps 1 and the lower grid plate anchor clamps 2, counterforce crossbeam 3 sets up between last grid plate anchor clamps 1 and lower grid plate anchor clamps 2, jack 4 is located between counterforce crossbeam 3 and last grid plate anchor clamps 1, counterforce crossbeam 3 lower part both ends all are provided with altitude mixture control subassembly 6, altitude mixture control subassembly 6 includes slider 61 and the screw thread lift post 62 of setting in the slider 61 bottom, slider 61 passes through slide rail 31 and counterforce crossbeam 3 sliding connection, screw thread lift post 62 has two at least, and it evenly sets up in the slider 61 bottom.

The upper grid plate fixture 1 comprises an outer square grid plate 11 and an inner circular grid plate 12, and the inner circular grid plate 12 is fixedly arranged in the middle of the outer square grid plate 11 through welding. The inner circular grating plate 12 further ensures the uniformity of the stress of the upper grating plate clamp 1, and because the jack 4 needs to lift the upper grating plate clamp 1, in order to ensure that the stress of the upper grating plate clamp 1 is more uniform, the grating plate of the upper grating plate clamp 1 is prevented from being damaged by the jack 4, and a backing plate is preferably arranged between the jack 4 and the upper grating plate clamp 1. The size of the backing plate is generally larger than the diameter of the inner circular grating plate 12, so that the force of the whole jack 4 is uniformly applied to the circular ring of the inner circular grating plate 12, the upper grating plate clamp 1 can be stressed at the maximum surface and is not deformed, and the upper grating plate clamp 1 is prevented from being damaged. The thickness of the backing plate is more than 40mm.

The lower grating plate clamp 2 is a round grating plate 21, and a concentric reinforcing ring 22 is arranged in the middle of the round grating plate 21. Because the common single pile is circular, the reserved steel bars of the pile reinforcement cage are uniformly distributed in a circular shape, and are matched with the shape of the circular grating plate 21, and when the pile reinforcement cage and the circular grating plate 21 are pulled up after being connected through an anchorage device, the stress of the whole lower grating plate clamp 2 is more uniform.

The two ends of the pull rod 5 are respectively provided with threads 51, at this time, the two ends of the pull rod 5 respectively penetrate through the upper grid plate clamp 1 and the lower grid plate clamp 2, and then are fixedly connected by adopting high-strength bolts.

Lifting lugs 7 are arranged at the end parts of the upper grating plate clamp 1 and the lower grating plate clamp 2. Because the upper grating plate clamp 1 and the lower grating plate clamp 2 are large in size and heavy in weight, the upper grating plate clamp and the lower grating plate clamp are required to be hoisted by a crane and the like, and the lifting lug 7 is designed to enable the hoisting to be simpler and safer.

The utility model relates to a single pile vertical anti-pulling static load test detection anchorage reaction device, which has the working principle that: during testing, pile reinforcement cage reserved steel bars of a single pile to be tested are uniformly inserted into holes of a lower grid plate clamp 2, then the pile reinforcement cage reserved steel bars are fixedly connected with the lower grid plate clamp 2 by adopting an anchorage device, two groups of cement piers are arranged on two sides of the single pile to be tested, then two ends of a counter-force beam 3 are placed on the two groups of cement piers, the position of a height adjusting component 6 on the cement piers is adjusted through a sliding block 61, the height adjusting component 6 is positioned in the middle of the cement piers, then a threaded lifting column 62 is adjusted, the whole counter-force beam 3 is horizontal, the existing method for adjusting the level of the counter-force beam 3 is generally a manner of plugging cushion blocks between the cement piers and the counter-force beam 3, the adjusting time is long, cushion blocks with proper sizes are not easy to find, the cushion blocks are plugged, the stress of the counter-force beam 3 is affected, the cushion blocks are damaged, and the counter-force beam 3 slides down and other risks are caused. After the counter-force beam 3 is installed, the jack 4 and the upper grid plate clamp 1 are placed on the counter-force beam 3 in sequence, meanwhile, the upper grid plate clamp 1 and the lower grid plate clamp 2 are uniformly connected by the pull rod 5, the upper grid plate clamp 1 is leveled by a leveling instrument, and finally, the bolts of the pull rod 5 on the top surface of the upper grid plate clamp 1 are screwed after the upper grid plate clamp 1 is leveled, so that a complete single pile anti-pulling tension system is finally formed. And then starting the jack 4 to lift the upper grid plate clamp 1 upwards, so that the vertical pulling-resistant static load test detection of the single pile can be performed.

According to the single pile vertical anti-pulling static test detection anchorage reaction device, the upper grid plate clamp 1 and the lower grid plate clamp 2 are respectively arranged on the upper side and the lower side of the reaction beam 3, reserved steel bars of a pile reinforcement cage can all penetrate through the lower grid plate clamp 2 at the bottom, the reserved steel bars are all uniformly fixed on the lower grid plate clamp 2 by adopting an anchorage device, the lower grid plate clamp 2 and the upper grid plate clamp 1 are fixedly connected by adopting a pull rod 5, and when a jack 4 is lifted upwards, the upper grid plate clamp 1 drives the lower grid plate clamp 2, so that all reserved steel bars of the pile reinforcement cage are subjected to upward tension, and the single pile vertical anti-pulling static test detection is realized stably and reliably; the whole device has a simple structure, the upper grating plate clamp 1 and the lower grating plate clamp 2 are connected by adopting a pull rod 5 through bolts, and the lower grating plate clamp 2 and reserved steel bars of the pile reinforcement cage are fixedly connected by adopting an anchorage device, so that the whole detection device can be repeatedly used for a plurality of times, and the installation of the whole detection device is more convenient and quicker; the anchor counter-force device for detecting the single pile pulling-resistant static load test is convenient for field installation, and is compared with a counter-force reinforced semicircular steel pier welding method, an inner steel cylinder and outer steel cylinder steel bar welding method and the like: the latter is time consuming to install in the field and does not guarantee that all the bars of the pile cage are stressed. The upper grid plate and the lower grid plate of the pull-out-resistant static load test anchor device are connected by the pull rod 5, the upper grid plate and the lower grid plate are fixed after the final high-strength bolts are screwed up, the installation and the disassembly are convenient, the time consumption is less, and the pile reinforcement cage can be ensured to bear all the reinforcing steel bars.

Meanwhile, the device provided by the utility model has good compatibility. The method is suitable for single-pile vertical pulling-resistant test detection of the cast-in-place pile with the diameter of 800-1500 mm, is widely applicable to pile types and has good compatibility. The pile reinforcement cage is uniformly and stably stressed, reserved steel bars pass through the lower grid plate clamp 2 of the whole device, all the steel bars are fixed on the lower grid plate clamp 2 by using an anchor device, and because of more grid plate holes, even if the positions of the steel bars of the pile body reinforcement cage deviate, each steel bar of the pile reinforcement cage can be ensured to vertically pass through, so that each steel bar can be simultaneously stressed, the pulling resistance is vertical, and the oblique pulling force can not be generated. The device can guarantee that pile body steel reinforcement cage reinforcing bar atress is in the coplanar in the single pile resistance to plucking static test testing process, and the atress is even stable.

The device of the utility model can save cost and can be repeatedly used. In the detection of a single pile anti-pulling static load test, the counter-force reinforced semicircular steel pier welding method needs to use a plurality of extension steel bars (the diameters of the extension steel bars are consistent with those of longitudinal bars of a pile body of a cast-in-place pile), and the steel bars are consumable products and cannot be reused, so that resource waste is caused. The anchor counter force detection device for the single pile pulling-resistant static load test is made of a steel plate with a certain thickness as a main material, is easy to process and form, and has high strength and strong field applicability. The whole device can be repeatedly used, has low cost, and can be widely popularized and used in single pile vertical anti-pulling static load test detection.

And the height adjusting component 6 that reaction beam 3 both ends lower part both ends set up, it can adjust the height at reaction beam 3 both ends, can also slide simultaneously adjust its position about on reaction beam 3, the problem that the reaction beam 3 that the uneven cement buttress that leads to of current reaction beam 3 lower extreme was placed adjusts the level comparatively difficult has been solved, also more extensive be applicable to complicated site environment simultaneously, play support, adjust the horizontally effect of reaction beam 3 to the cement buttress homoenergetic of different intervals fine, make the single stake atress of whole experiment even.

In the second embodiment, as shown in fig. 4, on the basis of the first embodiment, a triangular boss 52 is provided at one end of the pull rod 5, and a thread 51 is provided at the other end of the pull rod 5. That is, when the upper grid plate clamp 1 is connected with the lower grid plate clamp 2, one end of the pull rod 5 with the triangular boss 52 passes through the hole of the lower grid plate clamp 2, and then the pull rod 5 is rotated by 90 degrees to clamp the triangular boss 52 on the lower grid plate clamp 2, and then one end with the screw thread 51 passes through the hole of the upper grid plate clamp 1, and the pull rod 5 is fixed on the upper grid plate clamp 1 by using a bolt. That is, the cross section of one side of the triangular boss 52 is triangular, the cross section of the other side is rectangular, the width of the rectangle is the same as the diameter of the pull rod 5, the rectangular surface can ensure that the triangle can be inserted into the hole of the lower grid plate clamp 2, and after the triangle rotates, the triangle can ensure that the triangle is clamped on the lower grid plate clamp 2.

The time of installing and dismantling is further shortened, the installing and dismantling are more convenient, and the detection efficiency is improved.

Embodiment III: on the basis of the first embodiment, four threaded lifting columns 62 are uniformly arranged at the bottom of the sliding block 61, and an adjusting screw head 63 is arranged at the lower end of each threaded lifting column 62. The screw lifting column 62 can be rotated by screwing the adjusting screw 63, so that the reaction beam 3 can be adjusted in height. Meanwhile, due to the design of four threaded lifting columns 62 below each sliding block 61, the device is suitable for uneven cement piers, when the counter-force beam 3 is placed on the uneven cement piers, the threaded lifting columns 62 at corresponding positions are adjusted, so that the counter-force beam 3 can be stably contacted with the cement piers, and the stability of the counter-force beam 3 is guaranteed.

The single pile vertical anti-pulling static load test detection anchorage reaction device has the characteristics of simple structure and convenient installation and disassembly, can well ensure that all steel bars of a pile reinforcement cage can be uniformly stressed, and the heights of the two ends of the reaction beam 3 can be adjusted, so that the level of the reaction beam 3 is ensured, and the whole detection device is more convenient and faster to install.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. Vertical resistance to plucking static load test of single pile detects ground tackle reaction device, its characterized in that: including last grid board anchor clamps (1), lower grid board anchor clamps (2), counter-force crossbeam (3) and jack (4), go up between grid board anchor clamps (1) and lower grid board anchor clamps (2) through pull rod (5) connection, counter-force crossbeam (3) set up between last grid board anchor clamps (1) and lower grid board anchor clamps (2), jack (4) are located between counter-force crossbeam (3) and last grid board anchor clamps (1), counter-force crossbeam (3) lower part both ends all are provided with altitude mixture control subassembly (6), altitude mixture control subassembly (6) include slider (61) and set up screw thread lift post (62) in slider (61) bottom, slider (61) are through slide rail (31) and counter-force crossbeam (3) sliding connection, screw thread lift post (62) have two at least, and it evenly sets up in slider (61) bottom.

2. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: the upper grating plate clamp (1) comprises an outer square grating plate (11) and an inner circular grating plate (12), and the inner circular grating plate (12) is fixedly arranged in the middle of the outer square grating plate (11) through welding.

3. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: the lower grating plate clamp (2) is a round grating plate (21), and a concentric reinforcing ring (22) is arranged in the middle of the round grating plate (21).

4. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: threads (51) are arranged at two ends of the pull rod (5).

5. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: one end of the pull rod (5) is provided with a triangular boss (52), and the other end of the pull rod (5) is provided with threads (51).

6. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: a backing plate is arranged between the jack (4) and the upper grid plate clamp (1).

7. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: four threaded lifting columns (62) are uniformly arranged at the bottom of the sliding block (61), and an adjusting screw head (63) is arranged at the lower end of each threaded lifting column (62).

8. The single pile vertical pullout resistance static test detection anchor reaction device of claim 1, wherein: lifting lugs (7) are arranged at the ends of the upper grating plate clamp (1) and the lower grating plate clamp (2).