Static load anchor pile reaction loading test system for concrete piles based on post-embedded reinforcement

Abstract

The present invention discloses a concrete pile static load anchor pile reaction loading test system based on post-embedded reinforcement, comprising a test pile and engineering piles distributed on both sides of the test pile; it also comprises a support beam and a hydraulic jack; post-embedded reinforcement is post-embedded on the engineering pile, and anchoring steel bars are vertically passed through the support beam, and the lower end of the anchoring steel bar is connected to the post-embedded reinforcement via a connector; the upper end of the anchoring steel bar is fixed to the support beam via an upper pull-out force monitoring device; a support is provided on the test pile, and a hydraulic jack is provided on the support, and the hydraulic jack abuts against the bottom of the support beam. This solution can conveniently and quickly realize disassembly and assembly and testing by arranging supports, hydraulic jacks, post-embedded reinforcement, connectors, anchoring steel bars, support beams, and upper pull-out force monitoring devices on the test pile and the engineering pile, and the test accuracy is high.

Description

Technical field:

[0001] The invention relates to the technical field of pile foundation static load testing, and in particular to a concrete pile static load anchor pile reaction force loading test system based on post-embedded reinforcement. Background technology:

[0002] According to the pile foundation testing specifications, bearing capacity testing must be conducted using a static load test using a weighted platform reaction force method. This requires transporting to the site a weight no less than 2.4 times the design bearing capacity characteristic value (e.g., counterweights, steel beams, and other large equipment). While this traditional reaction force static load test can yield relatively accurate bearing capacity results, it has numerous drawbacks and limitations. These include the complex and heavy lifting machinery and equipment required, long operation times and potential safety hazards, and high testing costs. It also requires a large site area, which can sometimes make testing impossible due to limited space, a low sampling rate, and poorly representative test results. Furthermore, since plain concrete piles do not contain steel bars within their bodies, static load tests using the anchor pile reaction force method, as is the case with reinforced concrete piles, are not feasible. Therefore, for plain concrete piles, a new reaction force technology is needed that can overcome the shortcomings and limitations of the aforementioned traditional reaction force method while providing a sufficiently large reaction force to obtain accurate bearing capacity test results.

[0003] Drawing on the working principle of the anchor reaction method for reinforced concrete piles and leveraging nearby pile groups, we developed a post-embedded anchor reaction technology for plain concrete pile static load tests. This technology involves post-embedding steel bars of a specified specification into plain concrete piles to create anchor piles. This group of anchor piles then forms a reaction system, providing a sufficiently large reaction force for static load tests on single piles or composite foundations. Summary of the invention:

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a concrete pile static load anchor pile reaction loading test system based on post-embedded reinforcement.

[0005] The present invention is implemented by the following technical solutions: a static load anchor pile reaction loading test system for concrete piles based on post-embedded reinforcement, comprising a test pile and engineering piles distributed on both sides of the test pile; the system also comprises a support beam and a hydraulic jack;

[0006] Post-embedded reinforcement is post-embedded on the engineering piles, and anchor steel bars are vertically penetrated on the support beams. The lower ends of the anchor steel bars are connected to the post-embedded reinforcement via connectors; and the upper ends of the anchor steel bars are fixed to the support beams via an upper pull-out force monitoring device.

[0007] A support is provided on the test pile, and a hydraulic jack is provided on the support. The hydraulic jack abuts against the bottom of the support beam.

[0008] Furthermore, the connector includes a threaded high-quality rolled steel short joint and a first high-quality rolled steel sleeve, the first high-quality rolled steel sleeve is internally connected to the second high-quality rolled steel sleeve, a pipe groove is provided inside the first high-quality rolled steel sleeve, the side surface of the second high-quality rolled steel sleeve is threadedly connected to the internal thread of the pipe groove, the second high-quality rolled steel sleeve is threadedly connected to the anchor steel bar, the outside of the second high-quality rolled steel sleeve is provided with a fixed tube, and one end of the second high-quality rolled steel sleeve and the fixed tube are both provided with abutment rings that abut against each other; the fixed tube is threadedly connected to the outer side surface of the first high-quality rolled steel sleeve.

[0009] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The two foot pieces comprise a through-hole, a screw bolt, and a nut. The two foot pieces comprise a through-hole, a screw bolt, and a nut.

[0010] The movable end of the moving rod is rotatably connected to the rotating frame, and the side wall of the second groove away from the through hole is fixedly connected to the mounting rod. The center of the rotating frame is rotatably connected to the mounting rod, and the other end of the rotating frame is movably inserted with an extension frame, and the extension frame is rotatably connected to the push block. The end of the connecting rod arranged in the second groove away from the through hole is fixedly connected to the push block, and the opposite ends of the two connecting rods are fixedly connected to holding plates, and the two holding plates are movably connected to the inside of the through hole.

[0011] Furthermore, springs are sleeved on both connecting rods, one end of the two springs are fixedly connected to the side walls of the first groove and the second groove respectively, and the other end of the two springs are fixedly connected to the opposite side of the pressing block and the pushing block respectively.

[0012] Furthermore, the upper pull-out force monitoring device includes an upper pull-out force monitor, the bottom of the upper pull-out force monitor is fixedly connected to a bottom plate, the top of the upper pull-out force monitor is fixedly connected to a top plate, a power cord is provided on one side of the upper pull-out force monitor, and a warning light is provided on the other side of the upper pull-out force monitor, a mounting plate is fixedly connected to the bottom plate, a sliding groove is provided inside the mounting plate, an L-shaped slide is slidably connected inside the sliding groove, a threaded hole is provided inside the L-shaped slide, a threaded rod is threadedly connected inside the threaded hole, a splint is movably connected to the top of the threaded rod, and a knob is fixedly connected to the bottom end of the threaded rod; the bottom plate is provided on the support beam and is locked to the mounting plate by a threaded rod; the anchor steel bar passes through the support beam, the bottom plate, the upper pull-out force monitor and the top plate in sequence, and is fixed to the top plate by a nut.

[0013] Furthermore, a rubber pad is fixedly connected to the top of the clamping plate, and the top of the rubber pad overlaps the inner top wall of the support beam.

[0014] Furthermore, a flexible connecting rod is provided between the top plate and the bottom plate, and the power cord and the warning light are fixedly provided on the connecting rod.

[0015] Furthermore, the support includes a base plate, the edge of the base plate is provided with a strip-shaped recess, the bottom surface of the base plate is provided with a transverse strip groove and a vertical strip groove of different depths, the transverse strip groove and the vertical strip groove are respectively provided with a transverse positioning device and a vertical positioning device, the transverse positioning device has the same structure as the vertical positioning device, the transverse positioning device includes a bidirectional screw, both ends of the bidirectional screw are fixedly installed with a bearing seat, the bearing seat is fixedly connected to the inner wall of the transverse strip groove, one end of the bidirectional screw extends to the outside of the transverse strip groove, the one end of the bidirectional screw located outside the transverse strip groove is fixedly connected to a runner, and two symmetrically distributed movable seats are further provided on the bidirectional screw, the movable seat is threadedly connected to the bidirectional screw, the bottom end of the movable seat extends to the bottom of the base plate, and a locator is installed at the bottom end of the movable seat;

[0016] The base plate is placed on the upper part of the test pile, and the positioner abuts against the side wall of the test pile.

[0017] Furthermore, the positioner includes two symmetrically distributed movable plates, the edges of the two movable plates are hinged to the movable seat, and the two movable plates are hinged with support rods. The support rods are hinged with mounting rings at one end away from the movable plates, and fastening bolts are provided in the mounting rings. The mounting rings are connected to the movable seat through the fastening bolts.

[0018] Furthermore, a first threaded hole and a second threaded hole are provided on both sides of the movable seat, and both the first threaded hole and the second threaded hole are matched with the fastening bolts.

[0019] Advantages of the present invention:

[0020] 1. This solution provides a connector including a high-rolled steel short joint, a first high-rolled steel sleeve, a second high-rolled steel sleeve, an anchor steel bar and a fixing pipe. When in use, the rear-embedded reinforcement is threaded, and the high-rolled steel short joint utilizes the thread of the high-rolled steel itself. The rear-embedded reinforcement is connected to the high-rolled steel short joint through an ordinary steel bar sleeve at the engineering site, and the anchor steel bar is fixed to the support beam. This can achieve a quick connection between the anchor steel bar and the rear-embedded reinforcement and the effect of multiple uses, solving the problem that the existing anchor steel bar and the rear-embedded reinforcement are connected by welding or wedge-shaped anchors, resulting in cumbersome steps, inconvenience in quick disassembly and assembly, and a short service life.

[0021] 2. The connector provided in this scheme includes a short fine-rolled steel joint, a first fine-rolled steel sleeve, a second fine-rolled steel sleeve, an anchor steel bar and a fixed pipe. By connecting different types of second fine-rolled steel sleeves with the first fine-rolled steel sleeve, different types of anchor steel bars and post-embedded bars can be connected into one, thereby achieving the effect of facilitating the diameter-changing connection of the anchor steel bars and post-embedded bars, and solving the problem that when the diameters of the anchor steel bars and post-embedded bars are different, it is difficult to connect them using traditional connection methods.

[0022] 3. In this scheme, another connector is provided with a screw sleeve, a clamping piece and a through hole, and the rear embedded steel bar and the anchor steel bar are respectively plugged into the through holes on both sides of the connecting frame, and the two screw sleeves are used to screw the opposite ends of the rear embedded steel bar and the anchor steel bar to fix them, replacing the traditional connection method of welding or using a wedge anchor. It is easy to operate and easy to disassemble, thereby facilitating the connection of the anchor steel bar and the rear embedded steel bar; in addition, the pressing block of the connector is pressed to move the clamping piece at its bottom down into the through hole, and the bottom of the clamping piece contacts the upper surface of the embedded steel bar. At the same time, the moving rod moves downward, driving the rotating frame to rotate, causing the push block to move upward, and the clamping piece on the push block moves up into the through hole and contacts the surface of the embedded steel bar, so that the two clamping pieces press the embedded steel bar tightly to fix the embedded steel bar, and the screw sleeve can be screwed in or out of the embedded steel bar, thereby facilitating the installation and disassembly of the rear embedded steel bar and the anchor steel bar on both sides of the connecting frame.

[0023] 4. This scheme sets up a pull-out force monitoring device including a pull-out force monitor, a bottom plate, a top plate, and a mounting plate, so that the pull-out force monitor can be fixed on the support beam through the mounting plate, and the top end of the anchor steel bar passes through the support beam, the bottom plate, the pull-out force monitor and the top plate in sequence, and is fixed to the top plate through a nut; the bottom end of the anchor steel bar is fixed to the post-embedded reinforcement through a connector, so that the stress condition of the post-embedded reinforcement can be tested by the pull-out force monitor, and the pull-out force of the post-embedded reinforcement static load anchor pile can be monitored.

[0024] 5. The pull-out force monitoring device of this scheme can fix the pull-out force monitor on the support beam through the mutual cooperation between the connecting rod, mounting plate, slide groove, L-shaped slide plate, threaded rod, clamping plate, rubber pad and knob, so as to prevent the pull-out force monitor from shifting when monitoring the stress condition of the steel bar, avoid errors in the test results, improve the accuracy of the test, and facilitate the installation and disassembly of the pull-out force monitor, with simple and convenient operation.

[0025] 6. The jack support in this solution has a strip-shaped recess on the edge of the base plate, so that the steel bars can be passed through the strip-shaped recess when installing the base plate without bending or cutting the steel bars, thereby avoiding the problem that the steel bars on the test pile need to be bent or cut during the installation of the traditional support, and the damage to the steel bars will affect the subsequent use of the test pile; by providing a horizontal positioning device and a vertical positioning device at the bottom of the base plate, turning the knob can drive the movable seat and the movable plate to move toward the middle, and then clamp the anchor pile, so as to achieve positioning and ensure that the center of the anchor pile coincides with the center of the base plate, thereby avoiding the problem of eccentricity affecting the accuracy of the test during the installation of the traditional base plate through visual positioning, and the solution is highly practical.

[0026] 7. The jack of the present invention is manufactured by providing a first threaded hole and a second threaded hole on the movable seat. When the fastening bolts are installed in different threaded holes, the angle of the movable plate can be adjusted by the support rod, thereby being able to adapt to the positioning of cylindrical test piles and square column test piles respectively. Description of the drawings:

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the reaction force loading test system of concrete pile static load anchor pile based on post-embedded reinforcement of the present invention;

[0029] Figure 2 This is a structural schematic diagram of a connector according to the present invention;

[0030] Figure 3 for Figure 2 A magnified schematic diagram of point A;

[0031] Figure 4 It is a structural schematic diagram of another connector in the present invention;

[0032] Figure 5 for Figure 4 sectional view of

[0033] Figure 6 for Figure 4 Another cross-sectional view of;

[0034] Figure 7 Schematic diagram of the pull-out force monitoring device of the present invention;

[0035] Figure 8 for Figure 7 sectional view of

[0036] Figure 9 for Figure 8 A magnified schematic diagram of point A;

[0037] Figure 10 This is a schematic diagram of the jack base in the present invention;

[0038] Figure 11 for Figure 10 Bottom view of

[0039] Figure 12 This is a schematic diagram of the installation of the movable seat and movable plate of the jack base of the present invention.

[0040] In the figure: test pile 1, engineering pile 2, support beam 3, hydraulic jack 4, post-embedded reinforcement 5, anchor steel bar 6, connector 7, fine-rolled steel short joint 7.1, first fine-rolled steel sleeve 7.2, second fine-rolled steel sleeve 7.3, pipe groove 7.4, fixed pipe 7.5, anvil 7.6, connecting frame 7.7, through hole 7.8, screw sleeve 7.9, first groove 7.10, pressing block 7.11, second groove 7.12, connecting rod 7.13, moving rod 7.14, circular groove 7.15, vertical groove 7.16, rotating frame 7.17, mounting rod 7.18, extension frame 7.19, push block 7.20, holding piece 7.21, spring 7.22, Rebar sleeve 7.23, upper pull-out force monitoring device 8, upper pull-out force monitor 8.1, bottom plate 8.2, top plate 8.3, power cord 8.4, warning light 8.5, mounting plate 8.6, slide 8.7, L-shaped slide 8.8, threaded rod 8.9, splint 8.10, knob 8.11, rubber pad 8.12, connecting rod 8.13, support 9, base plate 9.1, recess 9.2, strip groove 9.3, bidirectional screw 9.4, bearing seat 9.5, runner 9.6, movable seat 9.7, movable plate 9.8, support rod 9.9, mounting ring 9.10, fastening bolt 9.11, first threaded hole 9.12, second threaded hole 9.13. Specific implementation method:

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] like Figure 1 As shown, the concrete pile static load anchor pile reaction loading test system based on post-embedded reinforcement includes a test pile 1 and engineering piles 2 distributed on both sides of the test pile 1; it also includes a support beam 3 and a hydraulic jack 4; post-embedded reinforcement 5 is post-embedded on the engineering pile 2, and an anchor steel bar 6 is vertically penetrated on the support beam 3, and the lower end of the anchor steel bar 6 is connected to the post-embedded reinforcement 5 through a connector 7; the upper end of the anchor steel bar 6 is fixed to the support beam 3 through an upper pull-out monitoring device 8; a support 9 is provided on the test pile 1, and a hydraulic jack 4 is provided on the support 9, and the hydraulic jack 4 is in contact with the bottom of the support beam 3.

[0043] like Figure 2-3 As shown, the connector 7 includes a threaded short connector 7.1 of fine-rolled steel and a first fine-rolled steel sleeve 7.2, the interior of the first fine-rolled steel sleeve 7.2 is connected to the second fine-rolled steel sleeve 7.3, the interior of the first fine-rolled steel sleeve 7.2 is provided with a pipe groove 7.4, the side surface of the second fine-rolled steel sleeve 7.3 is threadedly connected to the internal thread of the pipe groove 7.4, the second fine-rolled steel sleeve 7.3 is threadedly connected to the anchor steel bar 6, the exterior of the second fine-rolled steel sleeve 7.3 is provided with a fixing pipe 7.5, one end of the second fine-rolled steel sleeve 7.3 and the fixing pipe 7.5 are provided with abutment rings 7.6 that abut each other; the fixing pipe 7.5 is threadedly connected to the outer side surface of the first fine-rolled steel sleeve 7.2.

[0044] The connector 7 is used in the following ways: a thread is turned on one end of the rear-embedded reinforcement 5 implanted in the engineering pile 2, and the fine-rolled steel short joint 7.1 uses the thread of the fine-rolled steel itself to connect the rear-embedded reinforcement 5 and the fine-rolled steel short joint 7.1 as a whole through the ordinary steel bar sleeve 7.23 at the engineering site, and then the first fine-rolled steel sleeve 7.2 is threadedly connected to the fine-rolled steel short joint 7.1, and a suitable second fine-rolled steel sleeve 7.3 is selected, so that the size and texture of the inner groove of the second fine-rolled steel sleeve 7.3 match the anchor steel bar 6, after selecting a suitable second fine-rolled steel sleeve 7.3, the second fine-rolled steel sleeve 7.3 is connected to the internal thread of the pipe groove 7.4, and finally the fixed pipe 7.5 is sleeved on the outside of the second fine-rolled steel sleeve 7.3 and is threadedly connected to the side surface of the first fine-rolled steel sleeve 7.2. At this time, the second fine-rolled steel sleeve 7.3 and the first fine-rolled steel sleeve 7.2 are connected as a whole, thereby completing the diameter-reducing connection work between steel bars of different diameters.

[0045] Connector 7 can also be Figure 4-6As shown, it includes a connecting frame 7.7, and two through holes 7.8 are formed on the opposite side walls of the connecting frame 7.7. The two through holes 7.8 are respectively movably inserted with the rear planting bar 5 and the anchoring steel bar 6. The ends of the rear planting bar 5 and the anchoring steel bar 6 extending into the connecting frame 7.7 are screwed with screw sleeves 7.9. The opposite sides of the two screw sleeves 7.9 are in contact with the inner wall of the connecting frame 7.7. The connecting frame 7.7 is further provided with two first grooves 7.10 respectively connected to the two through holes 7.8. The interiors of the two first grooves 7.10 are both movably connected with pressing blocks 7.11. The interior of the connecting frame 7.7 is provided with two second grooves 7.12. The first groove 7. 10 and the inner wall of the second groove 7.12 on the opposite side are both movably connected with a connecting rod 7.13, one connecting rod 7.13 is fixedly connected to the back of the pressing block 7.11, and one end of the back of the pressing block 7.11 is rotatably connected to a moving rod 7.14, and the moving rod 7.14 is movably plugged into the interior of the second groove 7.12. A circular groove 7.15 is provided on the inner wall of the first groove 7.10 and the second groove 7.12 on the opposite side, and the side surface of the moving rod 7.14 is movably connected to the interior of the circular groove 7.15. A vertical groove 7.16 is provided on the inner bottom wall of the second groove 7.12, and the movable end of the moving rod 7.14 is movably plugged into the interior of the vertical groove 7.16;

[0046] The movable end of the moving rod 7.14 is rotatably connected to a rotating frame 7.17, and a mounting rod 7.18 is fixedly connected to the side wall of the second groove 7.12 away from the through hole 7.8. The center of the rotating frame 7.17 is rotatably connected to the mounting rod 7.18, and the other end of the rotating frame 7.17 is movably plugged with an extension frame 7.19, and the extension frame 7.19 is rotatably connected to a push block 7.20. The connecting rod 7.13 provided in the second groove 7.12 is fixedly connected to the push block 7.20 at one end away from the through hole 7.8, and the opposite ends of the two connecting rods 7.13 are fixedly connected to a holding piece 7.21, and the two holding pieces 7.21 are movably connected to the inside of the through hole 7.8.

[0047] The two connecting rods 7.13 are both sleeved with springs 7.22, one end of the two springs 7.22 is fixedly connected to the side walls of the first groove 7.10 and the second groove 7.12 respectively, and the other end of the two springs 7.22 is fixedly connected to the opposite side of the pressing block 7.11 and the pushing block 7.20 respectively.

[0048] The connector 7 is used in the following manner: the rear-planted reinforcement 5 and the anchoring steel bar 6 are respectively plugged into the through holes 7.8 on both sides of the connecting frame 7.7, and two screw sleeves 7.9 are used to screw the opposite ends of the rear-planted reinforcement 5 and the anchoring steel bar 6, replacing the welding connection method. The operation is simple and saves materials. By pressing the pressing block 7.11, the holding piece 7.21 at the bottom is moved down into the through hole 7.8, so that the bottom of the holding piece 7.21 contacts the surface of the rear-planted reinforcement 5. At the same time, the moving rod 7.14 moves downward, driving the rotating frame 7.17 to rotate. The pushing block 7.20 at the right end of the extension frame 7.19 is moved upward, so that the holding piece 7.21 on the pushing block 7.20 is moved up into the through hole 7.8 and contacts the surface of the rear anchor bar 5, so that the two holding pieces 7.21 are pressed against the rear anchor bar 5 to fix the rear anchor bar 5. The screw sleeve 7.9 can be screwed in or out of the rear anchor bar 5, replacing the connection method of the wedge anchor, facilitating the installation and removal of the rear anchor bar 5 and the anchor steel bar 6 on the connecting frame 7.7. The connector 7 can reuse the anchor steel bar 6, saving materials and easy operation.

[0049] like Figure 7-9 As shown, the upper pull force monitoring device 8 includes an upper pull force monitor 8.1, the bottom of the upper pull force monitor 8.1 is fixedly connected to a bottom plate 8.2, the top of the upper pull force monitor 8.1 is fixedly connected to a top plate 8.3, one side of the upper pull force monitor 8.1 is provided with a power cord 8.4, the other side of the upper pull force monitor 8.1 is provided with a warning light 8.5, the bottom plate 8.2 is fixedly connected to a mounting plate 8.6, the interior of the mounting plate 8.6 is provided with a sliding groove 8.7 running through the top and bottom, and the interior of the sliding groove 8.7 is slidably connected to an L-shaped The skateboard 8.8 and the L-shaped skateboard 8.8 are provided with threaded holes running through the upper and lower parts. The internal threads of the threaded holes are connected to the threaded rod 8.9. The top of the threaded rod 8.9 is movably connected to the splint 8.10. The bottom end of the threaded rod 8.9 is fixedly connected to the knob 8.11. The bottom plate 8.2 is arranged on the support beam 3 and is locked with the mounting plate 8.6 by the threaded rod 8.9. The anchor steel bar 6 passes through the support beam 3, the bottom plate 8.2, the upper pull-out force monitor 8.1 and the top plate 8.3 in sequence and is fixed to the top plate 8.3 by nuts.

[0050] The top of the clamping plate 8.10 is fixedly connected with a rubber pad 8.12, and the top of the rubber pad 8.12 overlaps the inner top wall of the support beam 3.

[0051] A flexible connecting rod 8.13 is further provided between the top plate 8.3 and the bottom plate 8.2, and a power cord 8.4 and a warning light 8.5 are fixedly provided on the connecting rod 8.13.

[0052] The method of using the pull-out force monitoring device 8 is as follows: the bottom plate 8.2 of the pull-out force monitor 8.1 is overlapped with the top of the two support beams 3, and the position of the pull-out force monitor 8.1 is adjusted. Then, the L-shaped slide 8.8 is moved left and right inside the slide groove 8.7 so that the two L-shaped slides 8.8 overlap with the two support beams 3. Then, the knob 8.11 is turned clockwise to drive the threaded rod 8.9 to move upward and the clamping plate 8.10 to move downward together. When the top of the rubber pad 8.12 overlaps the inner top wall of the support beam 3, , the L-shaped slide plate 8.8 can be fixed to the support beam 3, and the installation plate 8.6 and the bottom plate 8.2 can be prevented from moving on the support beam 3, thereby fixing the pull-out force monitor 8.1 on the two support beams 3; the top end of the anchor steel bar 6 passes through the support beam 3, the bottom plate 8.2, the pull-out force monitor 8.1 and the top plate 8.3 in sequence, and is fixed to the top plate 8.3 by a nut; when the hydraulic jack 4 pushes the support beam 3 upward, the stress condition of the anchor steel bar 6 can be tested, and then the pull-out force of the static load anchor pile of the post-embedded reinforcement 5 can be monitored.

[0053] like Figure 10-12 As shown, the support 9 includes a base plate 9.1, a strip-shaped recess 9.2 is provided on the edge of the base plate 9.1, and a transverse strip groove 9.3 and a vertical strip groove 9.3 of different depths are provided on the bottom surface of the base plate 9.1. A transverse positioning device and a vertical positioning device are respectively provided in the transverse strip groove 9.3 and the vertical strip groove 9.3. The transverse positioning device has the same structure as the vertical positioning device. The transverse positioning device includes a bidirectional screw 9.4, and bearing seats 9.5 are fixedly installed at both ends of the bidirectional screw 9.4. The bearing seats 9.5 are fixedly connected to the inner wall of the transverse strip groove 9.3. One end of the bidirectional screw 9.4 extends to the outside of the transverse strip groove 9.3. The bidirectional screw 9.4 is located at the outside of the transverse strip groove 9.3 and is fixedly connected to a runner 9.6. Two symmetrically distributed movable seats 9.7 are also provided on the bidirectional screw 9.4. The movable seat 9.7 is threadedly connected to the bidirectional screw 9.4. The bottom end of the movable seat 9.7 extends to the bottom of the base plate 9.1, and a locator is installed at the bottom of the movable seat 9.7.

[0054] The base plate 9 . 1 is placed on the upper portion of the test pile 1 , and the positioner abuts against the side wall of the test pile 1 .

[0055] The positioner includes two symmetrically distributed movable plates 9.8, the edges of the two movable plates 9.8 are hinged to the movable seat 9.7, and the two movable plates 9.8 are hinged with a support rod 9.9. The support rod 9.9 is hinged to the end away from the movable plate 9.8 with a mounting ring 9.10. A fastening bolt 9.11 is provided in the mounting ring 9.10, and the mounting ring 9.10 is connected to the movable seat 9.7 through the fastening bolt 9.11.

[0056] A first threaded hole 9.12 and a second threaded hole 9.13 are provided on both sides of the movable seat 9.7, and the first threaded hole 9.12 and the second threaded hole 9.13 are matched with the fastening bolt 9.11.

[0057] The support 9 is used as follows: first, the base plate 9.1 is lifted and placed on the anchor pile, and at the same time, the steel bar is passed through the strip-shaped recess 9.2, and then the two runners 9.6 are rotated in sequence. When the runner 9.6 rotates, it can drive the bidirectional screw 9.4 to rotate. The rotation of the bidirectional screw 9.4 can simultaneously drive the two movable seats 9.7 to move toward the middle of the bidirectional screw 9.4, and then drive the movable plate 9.8 installed on the movable seat 9.7 to move, and finally the movable plate 9.8 clamps the side of the test pile 1. At this time, the test pile 1 is located in the center of the base plate 9.1, thereby achieving positioning, and then a hydraulic jack 4 is placed on the upper part of the base plate 9.1. The hydraulic jack 4 abuts against the support beam 3. The hydraulic jack 4 provides a reaction force to the test pile 1 through the base plate 9.1 to carry out a reaction force loading test;

[0058] When positioning the square column anchor pile, remove the fastening bolt 9.11 in advance and reinstall the fastening bolt 9.11 in the second threaded hole 9.13. At this time, the movable plate 9.8 can be driven to rotate by the support rod 9.9, and the angle between the two movable plates 9.8 is adjusted to 180°. At this time, when the movable plate 9.8 is positioned, it can fit into the side wall of the square column anchor pile to achieve positioning.

[0059] Working principle:

[0060] 1. Select the engineering piles 2 on both sides of the test pile 1 and drill holes for them. After the drilling is completed, clean the inside of the drilled holes and pour strong anchor glue into the holes. After the glue is injected into the holes to a certain height, insert the rear anchor 5 (the rear anchor 5 has threads at both ends and one end is screwed to the bottom plate 8.2) and the bottom plate 8.2 into the drilled holes until the bottom of the bottom plate 8.2 fits into the inner bottom wall of the drilled hole. After the anchor glue solidifies, the anchor 5 is implanted; the rear anchor 5 is connected to the anchor steel bar 6 through the connector 7.

[0061] 2. Place a base on test pile 1. If test pile 1 has steel bars, pass the bars through the strip-shaped recess 9.2 of the base. Position the base using the horizontal and vertical positioning devices. Then, place a hydraulic jack 4 on top of the base. Place a support beam 3 on top of the hydraulic jack 4 (in engineering practice, the lower ends of the support beam 3 are also supported by pads). Upper pullout monitoring devices 8 are placed above both ends of the support beam 3. Anchor steel bars 6 pass through the support beam 3 and the upper pullout monitoring device 8 in sequence and are secured to the top plate 8.3 of the upper pullout monitoring device 8 using bolts.

[0062] 3. Start the hydraulic jack 4, and the support beam 3 and the post-embedded reinforcement 5 provide reaction force for the test pile 1. Monitor the stress of the post-embedded reinforcement 5 through the upper pull-out force monitoring device 8 to ensure that the reaction force provided by each engineering pile 2 is basically consistent, and use this to calculate the stress condition of the test pile 1.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A static anchor pile reaction loading test system for concrete piles based on post-embedded reinforcement, comprising a test pile and engineering piles distributed on both sides of the test pile; a support beam and a hydraulic jack; post-embedded reinforcement is post-embedded on the engineering pile, and anchor bars are vertically penetrated through the support beam, the lower ends of the anchor bars being connected to the post-embedded reinforcement via a connector; the upper ends of the anchor bars are fixed to the support beam via an upper pull-out force monitoring device; a support is provided on the test pile, and a hydraulic jack is provided on the support, and the hydraulic jack abuts the bottom of the support beam; The two rails are connected by a plurality of holes, each of which is connected to the two rails of the second frame, and the two rails are connected by a plurality of holes. The movable end of the moving rod is rotatably connected to the rotating frame, and the side wall of the second groove away from the through hole is fixedly connected to the mounting rod. The center of the rotating frame is rotatably connected to the mounting rod, and the other end of the rotating frame is movably inserted with an extension frame, and the extension frame is rotatably connected to the push block. The end of the connecting rod arranged in the second groove away from the through hole is fixedly connected to the push block, and the opposite ends of the two connecting rods are fixedly connected to holding plates, and the two holding plates are movably connected to the inside of the through hole.

2. The post-embedded concrete pile static anchor pile reaction loading test system according to claim 1 is characterized in that: Springs are sleeved on the two connecting rods, one end of the two springs is fixedly connected to the side walls of the first groove and the second groove respectively, and the other end of the two springs is fixedly connected to the opposite side of the pressing block and the pushing block respectively.

3. The post-embedded concrete pile static load anchor pile reaction loading test system according to claim 1 is characterized in that: The upper pull-out force monitoring device includes an upper pull-out force monitor, the bottom of the upper pull-out force monitor is fixedly connected to a bottom plate, the top of the upper pull-out force monitor is fixedly connected to a top plate, a power cord is provided on one side of the upper pull-out force monitor, and a warning light is provided on the other side of the upper pull-out force monitor, a mounting plate is fixedly connected to the bottom plate, a sliding groove is provided inside the mounting plate, an L-shaped slide is slidably connected inside the sliding groove, a threaded hole is provided inside the L-shaped slide, a threaded rod is threadedly connected to the inside of the threaded hole, a splint is movably connected to the top of the threaded rod, and a knob is fixedly connected to the bottom end of the threaded rod; the bottom plate is provided on the support beam and is locked to the mounting plate by a threaded rod; the anchor steel bar passes through the support beam, the bottom plate, the upper pull-out force monitor and the top plate in sequence, and is fixed to the top plate by a nut.

4. The post-embedded concrete pile static anchor pile reaction loading test system according to claim 3 is characterized in that: A rubber pad is fixedly connected to the top of the clamping plate, and the top of the rubber pad overlaps the inner top wall of the support beam.

5. The post-embedded concrete pile static load anchor pile reaction force loading test system according to claim 3 or 4, characterized in that: A flexible connecting rod is further provided between the top plate and the bottom plate, and the power line and the warning light are fixedly provided on the connecting rod.

6. The post-embedded concrete pile static anchor pile reaction loading test system according to claim 1 is characterized in that: The support includes a base plate, an edge of the base plate is provided with a strip-shaped recess, and the bottom surface of the base plate is provided with a transverse strip groove and a vertical strip groove of different depths, and a transverse positioning device and a vertical positioning device are respectively provided in the transverse strip groove and the vertical strip groove, and the transverse positioning device has the same structure as the vertical positioning device, and the transverse positioning device includes a bidirectional screw, both ends of the bidirectional screw are fixedly installed with a bearing seat, and the bearing seat is fixedly connected to the inner wall of the transverse strip groove, one end of the bidirectional screw extends to the outside of the transverse strip groove, and the one end of the bidirectional screw located outside the transverse strip groove is fixedly connected to the runner, and the bidirectional screw is also provided with two symmetrically distributed movable seats, the movable seat is threadedly connected to the bidirectional screw, the bottom end of the movable seat extends to the bottom of the base plate, and a locator is installed at the bottom end of the movable seat; The base plate is placed on the upper part of the test pile, and the positioner abuts against the side wall of the test pile.

7. The post-embedded concrete pile static anchor pile reaction loading test system according to claim 6 is characterized in that: The positioner includes two symmetrically distributed movable plates, the edges of the two movable plates are hinged to the movable seat, and support rods are hinged on the two movable plates. The support rods are hinged to a mounting ring at one end away from the movable plate, and fastening bolts are provided in the mounting ring. The mounting ring is connected to the movable seat through the fastening bolts.

8. The post-embedded reinforcement concrete pile static anchor pile reaction loading test system according to claim 7 is characterized in that: A first threaded hole and a second threaded hole are provided on both sides of the movable seat, and both the first threaded hole and the second threaded hole are matched with the fastening bolts.

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