CN111424736A

CN111424736A - Anchor pile cross beam counterforce device

Info

Publication number: CN111424736A
Application number: CN202010382634.3A
Authority: CN
Inventors: 沈悦时; 王春; 宋伟; 王文浩
Original assignee: Sichuan Henggu Construction Project Examination Co ltd
Current assignee: Sichuan Henggu Construction Project Examination Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-07-17

Abstract

The invention relates to an anchor pile cross beam counter-force device which comprises a jack, wherein a main beam is horizontally arranged at the top of the jack, secondary beams vertical to the main beam are horizontally arranged at two ends of the main beam, anchor piles embedded underground are arranged below two ends of the secondary beams, upper anchors corresponding to the anchor piles are arranged at two ends of the upper surface of the secondary beams, lower anchors corresponding to the upper anchors are arranged between the secondary beams and the anchor piles, the upper anchors and the lower anchors are detachably connected through a plurality of steel bars, and the lower anchors are detachably connected with reinforcing bars on the anchor piles. The detachable connection structure is adopted to replace steel bar welding, so that the workload is reduced, the construction efficiency is improved, the static load test of the anchor pile with common tonnage in building construction can be met, and the practicability is high.

Description

Anchor pile cross beam counterforce device

Technical Field

The invention relates to the technical field of pile foundation static load tests, in particular to an anchor pile cross beam counterforce device.

Background

In civil engineering, a pile foundation static load test is a basic requirement and method for verifying the design bearing capacity and construction quality of a pile foundation, so that the bearing capacity of the pile foundation and various design calculation parameters related to the bearing capacity are tested, and data are provided for design and construction. The basic principle of the static load test of the pile foundation is to load the weight of the pile foundation and simulate the future working conditions of the pile foundation so as to observe the settlement displacement of the top of the pile foundation generated along with the weight loading and determine the vertical compression bearing capacity of the corresponding test pile.

The core place of pile foundation static test is counterforce device, it has heap to carry counterforce device and anchor pile counterforce device to be common, its counterforce frame of traditional anchor pile counterforce device and anchor pile mainly lean on the reinforcing bar to carry out welded connection, because the reinforcing bar is more in quantity, it is big to lead to welding work load, long operation time, it leads to the material extravagant to produce a large amount of useless muscle among the welding process, and traditional counterforce device's bearing capacity is mostly 600t ~ 800t, to the static test of higher tonnage or to the anchor pile of different diameters, need disassemble the reinforcing bar after the welding, then change reinforcing bar and rewelding, so that work load further increases, and the work efficiency is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the anchor pile cross beam counterforce device, which adopts a detachable connection structure to replace steel bar welding, reduces the workload, improves the working efficiency, saves materials, can meet the anchor pile static load test of common tonnage in building construction, and has strong practicability.

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

the utility model provides an anchor pile crossbeam counterforce device, includes the jack, and jack top level is equipped with the girder, and girder both ends level is equipped with girder vertically secondary beam, and secondary beam both ends below is equipped with pre-buried in underground anchor pile, its characterized in that: the upper anchorage device corresponding to the anchor pile is arranged at two ends of the upper surface of the secondary beam, the lower anchorage device corresponding to the upper anchorage device is arranged between the secondary beam and the anchor pile, a plurality of steel bars are arranged on two sides of the end part of the secondary beam, the upper anchorage device is detachably connected with the lower anchorage device through the steel bars, and the lower anchorage device is detachably connected with the reinforcing bars on the anchor pile.

Furthermore, go up the ground tackle and include anchor slab and anchor slab down, anchor slab is flat in secondary beam upper surface tip down, goes up the anchor slab and connects through the baffle that a plurality of equidistance were arranged with anchor slab down, establishes the rod iron between two adjacent baffles, and rod iron one end can be dismantled with last anchor slab and be connected, and the rod iron other end can be dismantled with anchor down and be connected.

Further, anchor includes the steel cylinder, and two lateral walls that the steel cylinder upper end is relative are equipped with the diaphragm, and the steel cylinder upper end is equipped with the riser that a plurality of equidistance were arranged along the radial direction of steel cylinder, and riser bottom and diaphragm upper surface connection, the diaphragm between rod iron and two adjacent risers can be dismantled and be connected, and the disc is cup jointed to the steel cylinder lower extreme, and the disc can be dismantled with the arrangement of reinforcement and be connected.

Furthermore, first bayonets are formed in the upper anchor plate and the lower anchor plate between every two adjacent partition plates, and the steel bar is clamped into the first bayonets and then connected with the upper anchor plate through first nuts.

Furthermore, a second bayonet is arranged on the transverse plate between two adjacent vertical plates, and the steel bar is clamped into the second bayonet and then connected with the transverse plate through a second nut.

Furthermore, the lower surface of the disc is provided with a plurality of rib plates which are annularly arrayed along the side wall of the steel cylinder and connected with the side wall of the steel cylinder, a third bayonet is arranged on the disc between every two adjacent rib plates, and the reinforcing steel bars are clamped into the third bayonet and then connected with the disc through reinforcing steel bar sleeves.

Further, the outer diameter of the steel cylinder is 800 mm.

Further, the length of the third bayonet is 350 mm.

Furthermore, the reinforcing bars are made of three-grade deformed steel bars with the diameter of 25 mm.

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

1. the main beam, the secondary beam, the upper anchorage device and the lower anchorage device form the reaction frame, wherein the upper anchorage device and the lower anchorage device are detachably connected through the steel bar, the lower anchorage device is detachably connected with the reinforcing steel bars on the anchor piles, and the reaction frame is connected with the anchor piles through the detachable connection structure instead of a reinforcing steel bar welding mode, so that the structural reorganization can be realized for the static load tests of the anchor piles with different tonnages, the installation and the disassembly are convenient, the workload is reduced, and the working efficiency is improved.

2. The anchor bar and lower anchorage device is stable in integral structure, the maximum bearing capacity can reach 2000t, the anchor bar and lower anchorage device is suitable for anchor pile static load tests with common tonnage in building construction, the anchor bar and lower anchorage device can be connected by anchor piles with different diameters, steel bar disassembly and re-welding are not needed, and the anchor bar and lower anchorage device is high in practicability.

3. The invention eliminates the welding work of the steel bars, eliminates the instability and the stress limitation of the welding of the steel bars, reduces the generation of the steel bars in the welding process of the steel bars and saves materials.

Drawings

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

FIG. 2 is a schematic view of the connection of an upper anchor and a lower anchor according to the present invention;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a top view of an upper anchor according to the present invention;

FIG. 5 is a top view of the lower anchor of the present invention;

fig. 6 is a schematic structural view of a disc according to the present invention.

Reference numerals: 1-a jack; 2-main beam; 3-secondary beam; 4-anchor pile; 5-an upper anchorage device; 6-lower anchorage device; 7-a steel bar; 8-reinforcing bars; 9-upper anchor plate; 10-lower anchor plate; 11-a separator; 13-a steel cylinder; 14-a transverse plate; 15-standing the plate; 16-a disc; 17-a first bayonet; 19-a first nut; 20-a second bayonet; 21-a second nut; 22-a rib plate; 23-a third bayonet; 24-steel bar sleeve.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1-6, an anchor pile cross beam counterforce device comprises a jack 1, wherein a main beam 2 is horizontally arranged at the top of the jack 1, secondary beams 3 perpendicular to the main beam 2 are horizontally erected at two ends of the main beam 2, anchor piles 4 pre-buried underground are arranged below two ends of each secondary beam 3, and the jack 1, the main beam 2, the secondary beams 3 and the anchor piles 4 are conventional components of the counterforce device in an anchor pile static load test.

Because the reaction frame of traditional counterforce device is mostly welded with the arrangement of reinforcement on the anchor pile with adopting the reinforcing bar to be connected of anchor pile, needs reinforcing bar quantity more when concrete test to it is big to send weldment work volume, and to the anchor pile of different diameters, need disassemble the reinforcing bar after the welding, then change and weld again, lead to work load further to increase, reduce work efficiency. In order to solve the problem, the reaction device adopts a detachable connecting structure to replace steel bar welding connection, so that a large amount of steel bar welding work is reduced, the problem of steel bar expense generated in the steel bar disassembling and welding process is solved while steel bar welding is not needed, and materials are further saved.

Specifically, as shown in fig. 1, upper anchors 5 corresponding to anchor piles 4 are erected at two ends of the upper surface of the secondary beam 3, lower anchors 6 corresponding to the upper anchors 5 are arranged between the secondary beam 3 and the anchor piles 4, a plurality of steel bars 7 are arranged on two sides of the end portion of the secondary beam 3, the upper anchors 5 and the lower anchors 6 are detachably connected through the steel bars 7, and the lower anchors 6 are detachably connected with reinforcing bars 8 on the anchor piles 4. Like this, the last ground tackle 5, lower anchor 6, the rod iron 7 that correspond with every anchor pile 4 have constituted above-mentioned detachable connection structure jointly, combine girder 2 and secondary beam 3 to form whole reaction frame again, and four anchor piles 4 are then connected with whole reaction frame through four detachable connection structure.

As shown in fig. 2, 3 and 4, the upper anchor 5 specifically includes an upper anchor plate 9 and a lower anchor plate 10, wherein the lower anchor plate 10 is horizontally placed on the end portion of the upper surface of the secondary beam 3, the upper anchor plate 9 and the lower anchor plate 10 are connected by a plurality of partition plates 11 arranged at equal intervals, the upper anchor plate 9, the lower anchor plate 10 and the partition plates 11 are made of steel, and the upper anchor 5 is formed by integrally molding or welding the three. When the steel bar 7 is connected with the upper anchorage device 5, a steel bar 7 is arranged between two adjacent partition plates 11, one end of each steel bar 7 is detachably connected with the upper anchor plate 9, and the other end of each steel bar 7 is detachably connected with the lower anchorage device 6. For the connection between the steel bar 7 and the upper anchor plate 9, specifically, first bayonets 17 are respectively formed on the upper anchor plate 9 and the lower anchor plate 10 between two adjacent partition plates 11, the end portion of the steel bar 7 is clamped into the first bayonets 17, and then the steel bar 7 is connected with the upper anchor plate 9 through first screw caps 19, namely, the end portion of the steel bar 7 is provided with threads, and the first screw caps 19 are screwed up after being in threaded connection with the steel bar 7 so that the steel bar 7 is clamped and fixed on the upper anchor plate 9.

As shown in fig. 2, 3 and 5, the lower anchor 6 specifically includes a steel cylinder 13, two opposite side walls at the upper end of the steel cylinder 13 are provided with transverse plates 14, the upper end of the steel cylinder 13 is provided with a plurality of upright plates 15 arranged at equal intervals along the radial direction of the steel cylinder 13, the bottoms of the upright plates 15 are connected with the upper surface of the transverse plates 14, the transverse plates 14 and the upright plates 15 are also made of steel, and the transverse plates 14 and the upright plates 15 are integrally formed with the steel cylinder 13 or welded with the steel. When the steel rod 7 is connected with the lower anchor 6, specifically, the steel rod 7 is detachably connected with the transverse plate 14 between two adjacent vertical plates 15, namely, the transverse plate 14 between the two adjacent vertical plates 15 is provided with a second bayonet 20, the second bayonet 20 corresponds to the first bayonet 17 one by one, the steel rod 7 is connected with the transverse plate 14 through a second nut 21 after being clamped into the second bayonet 20 and is clamped on the transverse plate 14, and the steel rod 7 is clamped on the upper anchor plate 9 in the same manner. Because the counter force brought by the anchor piles 4 acts on the transverse plate 14 during the test, the strength of the transverse plate 14 can be further improved by arranging the vertical plate 15.

For the connection of the lower anchorage device 6 and the reinforcing bars 8 on the anchor pile 4, the lower end of the steel cylinder 13 is sleeved with a disc 16, the disc 16 is detachably connected with the reinforcing bars 8, the disc 16 is made of steel materials, and the steel cylinder 13 and the disc 16 are integrally formed or welded. Because the counter force brought by the anchor piles 4 acts on the disc 16 during the test, in order to improve the strength of the disc 16, a plurality of rib plates 22 which are annularly arrayed along the side wall of the steel cylinder 13 and connected with the side wall of the steel cylinder 13 are arranged on the lower surface of the disc 16, the rib plates 22 are made of steel materials, and the steel cylinder 13 and the disc 16 are integrally formed or welded. When the reinforcing bars 8 are connected with the disc 16, a third bayonet 23 is formed in the disc 16 between two adjacent rib plates 22, the third bayonets 23 correspond to the reinforcing bars 8 one by one, the reinforcing bars 8 are connected with the disc 16 through reinforcing bar sleeves 24 after being clamped into the third bayonets 23 and are clamped on the disc 16, and the clamping principle of the clamping is also the same as that of the steel bar 7.

Through the structure, when the anchor pile static load test is carried out by using the counterforce device, the counterforce device can be disassembled and assembled at any time according to the test requirements, compared with the traditional counterforce device, the counterforce device has a more stable structure, and simultaneously subtracts a large amount of steel bar welding work, so that the working efficiency can be greatly improved. In combination with the specifications of anchor piles commonly used in practical building construction, the diameter range of the anchor piles is mostly 800 mm-1500 mm, so the outer diameter of the steel cylinder 13 adopted by the invention is preferably 800mm, the overall diameter of the outer diameter of the disc reaches 1500mm, and then the length of the third bayonet 23 is preferably 350mm, so that the anchor pile can be suitable for the anchor piles with different diameters commonly used. In addition, in order to meet the anchor pile static load test of common large and small tonnage, the maximum bearing capacity of the reaction device is preferably designed to be 2000t, namely 500t of reaction force needs to be provided for each of four anchor piles, therefore, three-level deformed steel bars with the diameter of 25mm are preferably adopted for the selection of the reinforcing bars 8, the bearing capacity of each reinforcing bar 8 is 19.6t, the bearing capacity of 500t can be achieved by adopting 26 reinforcing bars, and the number of the third clamping openings 23 is correspondingly set to be 26.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the claims of the present invention.

Claims

1. The utility model provides an anchor pile crossbeam counterforce device, includes jack (1), and jack (1) top level is equipped with girder (2), and girder (2) both ends level is equipped with girder (2) vertically secondary beam (3), and secondary beam (3) both ends below is equipped with pre-buried in anchor pile (4) underground, its characterized in that: last ground tackle (5) that correspond with anchor pile (4) are equipped with at secondary beam (3) upper surface both ends, are equipped with between secondary beam (3) and anchor pile (4) lower ground tackle (6) that correspond with last ground tackle (5), and a plurality of rod irons (7) are established to secondary beam (3) tip both sides, go up ground tackle (5) and anchor utensil (6) down and can dismantle through rod iron (7) and be connected, and lower anchor utensil (6) can dismantle with arrangement of reinforcement (8) on anchor pile (4) and be connected.

2. An anchor pile beam reaction device according to claim 1, wherein: go up ground tackle (5) and include anchor slab (9) and anchor slab (10) down, anchor slab (10) are kept flat in secondary beam (3) upper surface tip down, go up anchor slab (9) and anchor slab (10) down and are connected through baffle (11) that a plurality of equidistance were arranged, establish rod iron (7) between two adjacent baffle (11), rod iron (7) one end can be dismantled with last anchor slab (9) and be connected, rod iron (7) other end can be dismantled with lower ground tackle (6) and be connected.

3. An anchor pile beam reaction device according to claim 2, wherein: lower ground tackle (6) include steel cylinder (13), two lateral walls that steel cylinder (13) upper end is relative are equipped with diaphragm (14), steel cylinder (13) upper end is equipped with riser (15) that a plurality of equidistance were arranged along steel cylinder (13) radial direction, riser (15) bottom and diaphragm (14) upper surface connection, diaphragm (14) between steel bar (7) and two adjacent risers (15) can be dismantled and be connected, disc (16) are cup jointed to steel cylinder (13) lower extreme, disc (16) can be dismantled with arrangement of reinforcement (8) and be connected.

4. An anchor pile beam reaction device according to claim 2, wherein: first bayonets (17) are all seted up on last anchor slab (9) between two adjacent baffles (11) and anchor slab (10) down, and rod iron (7) are connected with last anchor slab (9) through first nut (19) after being blocked in first bayonet (17).

5. An anchor pile beam reaction device according to claim 3, wherein: a second bayonet (20) is arranged on the transverse plate (14) between two adjacent vertical plates (15), and the steel bar (7) is clamped into the second bayonet (20) and then is connected with the transverse plate (14) through a second nut (21).

6. An anchor pile beam reaction device according to claim 3, wherein: the lower surface of the disc (16) is provided with a plurality of rib plates (22) which are annularly arrayed along the side wall of the steel cylinder (13) and connected with the side wall of the steel cylinder (13), a third bayonet (23) is arranged on the disc (16) between two adjacent rib plates (22), and the reinforcing bars (8) are clamped into the third bayonet (23) and then connected with the disc (16) through reinforcing steel bar sleeves (24).

7. An anchor pile beam reaction device according to claim 3, wherein: the outer diameter of the steel cylinder (13) is 800 mm.

8. An anchor pile beam reaction device according to claim 6, wherein: the length of the third bayonet (23) is 350 mm.

9. An anchor pile beam reaction device according to claim 6, wherein: the reinforcing bar (8) adopts three-level deformed steel bar with the diameter of 25 mm.