Detection device for uplift bearing capacity of foundation

Abstract

The utility model discloses a device for detecting the uplift bearing capacity of a foundation, which relates to the technical field of foundation detection, and comprises a pile head, a counter-force pile, a jack and a steel beam, the top of the pile head is movably sleeved with a central positioning assembly, and the central positioning assembly comprises a combined semi-ring I and a combined semi-ring II; the sides, close to each other, of the first combined semi-ring and the second combined semi-ring are detachably and fixedly connected through a fastening bolt. According to the utility model, the center positioning assembly and the pressure-bearing positioning assembly are matched for use, so that the two groups of jacks can uniformly act on the pile head through the steel beam when applying vertical pressure, and the acting force on the pile head is consistent with the direction of the vertical axis, thereby ensuring the accuracy of subsequent detection data and improving the detection accuracy. By means of the detachable combined structure of the first combined semi-ring, the second combined semi-ring and the center rod in the center positioning assembly, follow-up classified storage and use work of the center positioning assembly and the steel beams are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation detection, in particular to a detection device for the anti-pulling bearing capacity of a foundation. Background Art

[0002] In construction projects, to ensure the quality of level instrumentation, it is essential to test the vertical pull-out bearing capacity of single piles. For example, in high-rise buildings with basements, due to the buoyancy of groundwater, level instruments in the basement often have pull-out bearing capacity requirements. Therefore, testing the vertical pull-out bearing capacity of single piles becomes a key testing item during test piles and engineering pile inspections.

[0003] The prior art proposes a Chinese patent with announcement number CN221608940U, a single pile vertical pull-out bearing capacity detection device, in order to solve the problem that the existing concrete cast-in-place pile pull-out bearing capacity test method is generally large in size due to the need to meet strength requirements, compared with the prior art, the utility model is through the mid-span of the pull-out steel beam to the upper part of the center of the positioning instrument, and jacks of the same model are set at both ends of the steel beam, and the exposed steel bars of the concrete cast-in-place pile are all adjusted and evenly arranged on both sides of the mid-span of the steel beam, and the exposed steel bars of the concrete cast-in-place pile are firmly connected to the steel beam by welding, and an upper and lower layer of steel plates are set, which are connected by high-strength screws, and a reaction beam is set in the middle of the two layers of steel plates. The lower steel plate is welded to the steel bars through the screws to achieve effective connection between the reaction device and the test pile, and the steel bars can be pre-tightened by adjusting the bolts, so that each steel bar can be evenly stressed, and the test can be carried out and completed smoothly.

[0004] However, this existing technology cannot quickly and accurately ensure that the relative force of the steel beam on the pile head is in the direction of the vertical center axis of the pile head, resulting in uneven force on the steel bars on the pile head, which in turn affects the accuracy of the detection results. Utility Model Content

[0005] The purpose of the utility model is to provide a device for detecting the pull-out bearing capacity of a foundation to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A device for detecting the pull-out bearing capacity of a foundation comprises a pile head, a reaction pile, a jack and a steel beam. The top of the pile head is movably sleeved with a center positioning component, and the center positioning component is located at the bottom of the steel beam.

[0008] The center positioning assembly includes a combined half ring 1 and a combined half ring 2. The sides of the combined half ring 1 and the combined half ring 2 that are close to each other are detachably fixedly connected by fastening bolts. A center threaded hole is provided on the upper surface of the combined half ring 1, and a center rod is threadedly connected to the inner wall of the center threaded hole.

[0009] Pressure-bearing positioning components for positioning the jacks are provided near both sides of the steel beam.

[0010] A further improvement of the technical solution of the present utility model is that the pressure-bearing positioning assembly includes a sleeve fixedly connected to the inner wall of the steel beam, the inner wall of the sleeve is plugged with a rod, the bottom end of the rod is fixedly connected to a positioning chassis, and the bottom surface of the positioning chassis is movably plugged with the ejection end of the jack.

[0011] A further improvement of the technical solution of the present utility model is that: the number of the pressure-bearing positioning components is two groups, and the two groups of the pressure-bearing positioning components are symmetrically distributed on the inner walls of the steel beam near both ends.

[0012] A further improvement of the technical solution of the present invention is that: a steel bar is fixedly connected to the top of the pile head, a threaded rod is welded to the top of the steel bar, the top of the threaded rod passes through the top of the steel beam, a positioning steel plate is provided at the top of the threaded rod, the bottom surface of the positioning steel plate is fixedly connected to the upper surface of the steel beam, and a mounting hole for docking with the center rod is opened at the center of the upper surface of the positioning steel plate.

[0013] A further improvement of the technical solution of the present invention is that the top end of the threaded rod is detachably fixedly connected to the positioning steel plate via a nut.

[0014] A further improvement of the technical solution of the present utility model is that: the number of the jacks is two groups, and the two groups of jacks are symmetrically distributed on the bottom surface of the steel beam near both ends.

[0015] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0016] 1. The utility model provides a device for detecting the pull-out bearing capacity of foundation. By using a center positioning component and a pressure positioning component in combination, two sets of jacks can evenly act on the pile head through the steel beam when applying vertical pressure, and make the force on the pile head consistent with the direction of its vertical axis, thereby ensuring the accuracy of subsequent test data.

[0017] 2. The utility model provides a device for detecting the pull-out bearing capacity of a foundation, which utilizes the detachable combined structure of the combined half ring 1, the combined half ring 2 and the center rod in the center positioning component to facilitate the subsequent classification, storage and use of the center positioning component and the steel beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the bottom-up structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the center positioning component structure of the utility model;

[0021] Figure 4 This is a schematic structural diagram of the pressure-bearing positioning component of the present utility model.

[0022] In the figure: 1. Pile head; 2. Reaction pile; 3. Jack; 4. Steel beam; 5. Positioning steel plate; 6. Center positioning assembly; 7. Rebar; 8. Threaded rod; 9. Pressure-bearing positioning assembly; 10. Center rod; 11. Combined half ring 1; 12. Combined half ring 2; 13. Center threaded hole; 14. Fastening bolt; 15. Sleeve; 16. Insert rod; 17. Positioning chassis. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] The present invention is further described in detail below with reference to the embodiments:

[0025] Example 1

[0026] like Figure 1-4 As shown, the utility model provides a device for detecting the pull-out bearing capacity of a foundation, comprising a pile head 1, a reaction pile 2, a jack 3 and a steel beam 4. The top of the pile head 1 is movably sleeved with a center positioning component 6, which is located at the bottom of the steel beam 4.

[0027] The center positioning assembly 6 includes a combined half ring 11 and a combined half ring 2 12. The combined half ring 11 and the combined half ring 2 12 are detachably fixedly connected on their mutually adjacent sides by a fastening bolt 14. A center threaded hole 13 is provided on the upper surface of the combined half ring 11, and a center rod 10 is threadedly connected to the inner wall of the center threaded hole 13.

[0028] The steel beam 4 is provided with pressure-bearing positioning components 9 near both sides for positioning the jack 3. The pressure-bearing positioning components 9 include a sleeve 15 fixedly connected to the inner wall of the steel beam 4, a rod 16 is inserted into the inner wall of the sleeve 15, and the bottom end of the rod 16 is fixedly connected to a positioning chassis 17, and the bottom surface of the positioning chassis 17 is movably connected to the ejection end of the jack 3.

[0029] There are two groups of pressure-bearing positioning components 9 , and the two groups of pressure-bearing positioning components 9 are symmetrically distributed on the inner walls of the steel beam 4 near both ends.

[0030] When the centering assembly 6 is not in use, the first and second half rings 11, 12, and the center rod 10 can be quickly separated. Otherwise, they can be quickly reassembled for use. While the centering assembly 6 is in use, the steel bar 7 remains within its internal space and does not interfere with detection.

[0031] The top of the positioning chassis 17 is fixed to the sleeve 15 by a nut, and the nut can also be removed to pull the insertion rod 16 out of the sleeve 15 for classified storage.

[0032] The center positioning assembly 6 and the pressure-bearing positioning assembly 9 can be set to different specifications so as to adapt to different pile heads 1 and jacks 3.

[0033] Example 2

[0034] like Figure 1-4 As shown, based on Example 1, the utility model provides a technical solution: preferably, the top of the pile head 1 is fixedly connected with a steel bar 7, the top of the steel bar 7 is welded with a threaded rod 8, the top of the threaded rod 8 passes through the top of the steel beam 4, and the top of the threaded rod 8 is provided with a positioning steel plate 5. The bottom surface of the positioning steel plate 5 is fixedly connected to the upper surface of the steel beam 4, and a mounting hole for docking the center rod 10 is opened at the center of the upper surface of the positioning steel plate 5.

[0035] The top end of the threaded rod 8 is detachably fixedly connected to the positioning steel plate 5 via a nut.

[0036] There are two groups of jacks 3 , which are symmetrically distributed on the bottom surface of the steel beam 4 near both ends.

[0037] The following is a detailed description of the working principle of the detection device for the pull-out bearing capacity of the foundation.

[0038] like Figure 1-4 As shown, when in use, the combined half ring 11 and the combined half ring 2 12 are connected and combined by fastening bolts 14, and then sleeved on the top of the pile head 1 to be tested, and then the center rod 10 is installed in the center threaded hole 13. At this time, the vertical center axis of the pile head 1 is consistent with the vertical extension line of the center rod 10.

[0039] When erecting the steel beam 4, first align the mounting holes on the positioning steel plate 5 with the top of the center rod 10, then slowly lower the steel beam 4 to a suitable height. At this point, align the jacks 3 with the positioning chassis 17, and then place the steel beam 4 on top of the jacks 3 for support. Since the tops of the jacks 3 are aligned with the positioning chassis 17, the two sets of jacks 3 are located on the transverse center axis of the steel beam 4, thereby ensuring that the bottom surfaces of both ends of the steel beam 4 are evenly stressed.

[0040] Finally, the steel bar 7 and the threaded rod 8 are welded, and the threaded rod 8 is fixed on the positioning steel plate 5, and subsequent inspection work can be carried out.

[0041] It should be noted that, in this article, the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or still includes elements that are inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element. The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to it based on the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A device for detecting the pull-out bearing capacity of a foundation, comprising a pile head (1), a reaction pile (2), a jack (3) and a steel beam (4), characterized in that: A center positioning component (6) is movably sleeved on the top of the pile head (1), and the center positioning component (6) is located at the bottom of the steel beam (4); The center positioning assembly (6) includes a combined half ring (11) and a combined half ring (12), wherein the combined half ring (11) and the combined half ring (12) are detachably fixedly connected on one side thereof close to each other by a fastening bolt (14), and a center threaded hole (13) is provided on the upper surface of the combined half ring (11), and a center rod (10) is threadedly connected to the inner wall of the center threaded hole (13); Pressure-bearing positioning components (9) for positioning the jack (3) are provided near both sides of the steel beam (4).

2. The device for detecting the pull-out bearing capacity of a foundation according to claim 1, characterized in that: The pressure-bearing positioning assembly (9) includes a sleeve (15) fixedly connected to the inner wall of the steel beam (4), an insertion rod (16) is inserted into the inner wall of the sleeve (15), the bottom end of the insertion rod (16) is fixedly connected to a positioning chassis (17), and the bottom surface of the positioning chassis (17) is movably inserted into the ejection end of the jack (3).

3. The device for detecting the pull-out bearing capacity of a foundation according to claim 1, characterized in that: The number of the pressure-bearing positioning components (9) is two groups, and the two groups of the pressure-bearing positioning components (9) are symmetrically distributed on the inner walls of the steel beam (4) near both ends.

4. The device for detecting the pull-out bearing capacity of a foundation according to claim 1, characterized in that: The top of the pile head (1) is fixedly connected with a steel bar (7), the top of the steel bar (7) is welded with a threaded rod (8), the top of the threaded rod (8) passes through the top of the steel beam (4), and the top of the threaded rod (8) is provided with a positioning steel plate (5), the bottom surface of the positioning steel plate (5) is fixedly connected to the upper surface of the steel beam (4), and the center of the upper surface of the positioning steel plate (5) is provided with a mounting hole for docking with the center rod (10).

5. The device for detecting the pull-out bearing capacity of a foundation according to claim 4, characterized in that: The top end of the threaded rod (8) is detachably fixedly connected to the positioning steel plate (5) via a nut.

6. The device for detecting the pull-out bearing capacity of a foundation according to claim 1, characterized in that: The number of the jacks (3) is two groups, and the two groups of jacks (3) are symmetrically distributed on the bottom surface of the steel beam (4) near both ends.

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