Static load test displacement testing device suitable for pile foundation

Abstract

The utility model discloses a static load test displacement testing device suitable for a pile foundation, which relates to the technical field of static load tests and comprises the pile foundation, displacement detection mechanisms are arranged on two sides of the top end of the pile foundation, reference adjusting mechanisms are arranged at two ends of each displacement detection mechanism, and supporting mechanisms are arranged inside the bottom ends of the reference adjusting mechanisms. According to the utility model, through the cooperative arrangement of the displacement detection mechanism, the reference adjustment mechanism and the supporting mechanism, multi-point displacement testing can be carried out on pile foundations with different sizes, so that more comprehensive displacement data can be obtained, the displacement characteristics and the deformation trend of the pile foundations can be judged more accurately, and more information is provided for engineering design and safety evaluation.

Description

Technical Field

[0001] The utility model relates to the technical field of static load test, in particular to a static load test displacement test device suitable for pile foundations. Background Art

[0002] As a core technical means in construction engineering, the pile foundation static load test plays an irreplaceable role in ensuring the safety and stability of buildings. The test simulates the load conditions of the pile foundation under actual working conditions by gradually applying a predetermined force to the pile foundation. During the test, professionals will use high-precision displacement sensors to closely monitor the tiny displacement changes of the pile top at different loading stages. These displacement data are not only key indicators for evaluating the bearing performance of the pile foundation, but also reveal the complex mechanical properties of the interaction between the pile foundation and the soil.

[0003] For example, Chinese patent CN218880968U discloses a simple and lightweight static load test detection device, including a reference beam, a slider, a connecting column, a displacement sensor, a test pile and a second weight, so as to adjust the height of the loading plate, which can be applied to pile foundations of different heights, is more flexible and convenient to use, greatly facilitates static load tests, and has good convenience. However, when the above-mentioned static load test detection device is tested, it is tested by two symmetrical groups of displacement sensors, and because the static load displacement test of the pile foundation is carried out by gravity, it is impossible to judge the displacement of the pile foundation surface by only testing with two groups of displacement sensors, which will result in the displacement data obtained being not comprehensive enough, and there are limitations to the displacement test of the pile foundation.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a static load test displacement testing device suitable for pile foundations to overcome the above technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A static load test displacement testing device suitable for pile foundation comprises a pile foundation, wherein displacement detection mechanisms are arranged on both sides of the top of the pile foundation, reference adjustment mechanisms are arranged at both ends of the displacement detection mechanism, and a supporting mechanism is arranged inside the bottom end of the reference adjustment mechanism.

[0008] Furthermore, in order to realize multi-point displacement testing of pile foundations of different sizes, the distance between the displacement detectors can be appropriately adjusted according to the size of the pile foundation under the rotation of the handle and the limiting action of the cam groove and the connecting column, so that the displacement testing device can be suitable for multi-point displacement testing of pile foundations of different sizes. The displacement detection mechanism includes a plurality of displacement detectors arranged on one side of the top of the pile foundation, a moving block is arranged at one end of the displacement detector, a plurality of connecting columns are penetrated on one side of the moving block, a semicircular groove is provided on the side wall of one end of the moving block, a slot shaft is arranged inside the semicircular groove, a plurality of cam grooves are arranged on the outside of the slot shaft, and the plurality of cam grooves are symmetrically arranged with the center line of the slot shaft as the symmetry axis, the cam grooves on the same side are inclined from the end of the slot shaft to the middle in sequence, and the inclination angle of the cam grooves on the same side gradually decreases from the end of the slot shaft to the middle; a follower column matching the cam groove is arranged inside the semicircular groove, and both ends of the slot shaft are provided with limiting plates sleeved on the outside of the connecting column, the cross section of the limiting plate is a square structure, and a handle is provided at one end of the slot shaft.

[0009] Furthermore, in order to ensure that the displacement detection mechanism is placed horizontally on an uneven ground to ensure the accuracy of measurement, the threaded rod can be driven to rotate under the rotation of the rotating ring, and the limit block can be moved up and down under the action of the annular groove limit until the connecting column connected to the limit block is adjusted to a horizontal state, thereby realizing the horizontal placement of the displacement detection mechanism. The reference adjustment mechanism includes a limit block arranged at the end of the connecting column, a threaded rod is penetrated through the top of the limit block, a rotating ring is arranged at the top of the threaded rod, a fixed ring is arranged at the outer top of the threaded rod, and an annular groove matching the fixed ring is opened at the top of the limit block.

[0010] Furthermore, in order to ensure that the displacement testing device can be placed stably on the ground, the conical column can be inserted into the soil to ensure that the base is placed close to the ground. The supporting mechanism includes a sleeve arranged at the bottom of the limit block, a base is arranged at the bottom end of the sleeve, conical columns are arranged at the four corners of the bottom end of the base, and a thread matching the threaded rod is opened at the top of the sleeve.

[0011] The beneficial effects of the utility model are:

[0012] The utility model can perform multi-point displacement tests on pile foundations of different sizes through the coordinated arrangement of the displacement detection mechanism, the reference adjustment mechanism and the support mechanism, so as to obtain more comprehensive displacement data, and furthermore, the displacement characteristics and deformation trends of the pile foundation can be more accurately determined, thus providing more information for engineering design and safety assessment.

[0013] By setting up a displacement detection mechanism, the distance between the displacement detectors can be appropriately adjusted according to the size of the pile foundation under the rotation of the handle and the limiting action of the cam groove and the connecting column, so that the displacement testing device can be suitable for multi-point displacement testing of pile foundations of different sizes.

[0014] By setting up the coordination of the reference adjustment mechanism and the support mechanism, the threaded rod can be driven to rotate inside the sleeve under the rotation of the rotating ring, and the limit block can be moved up and down under the action of the annular groove limit until the connecting column connected to the limit block is adjusted to a horizontal state, thereby realizing the horizontal placement of the displacement detection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is one of the structural schematic diagrams of a static load test displacement test device suitable for pile foundation according to an embodiment of the utility model;

[0017] Figure 2 This is a second structural schematic diagram of a static load test displacement test device suitable for pile foundation according to an embodiment of the utility model;

[0018] Figure 3 It is a three-dimensional assembly diagram of a static load test displacement test device suitable for pile foundation according to an embodiment of the utility model;

[0019] Figure 4 It is a three-dimensional assembly diagram of a displacement detection mechanism and a connecting column in a static load test displacement test device suitable for pile foundation according to an embodiment of the utility model;

[0020] Figure 5 It is a schematic diagram of a static load test implementation of a static load test displacement test device suitable for pile foundation according to an embodiment of the utility model.

[0021] In the figure:

[0022] 1. Pile foundation; 2. Displacement detection mechanism; 201. Displacement detector; 202. Moving block; 203. Semicircular groove; 204. Slot shaft; 205. Cam groove; 206. Follow-up column; 207. Limit plate; 208. Handle; 209. Connecting column; 3. Reference adjustment mechanism; 301. Limit block; 302. Threaded rod; 303. Rotating ring; 304. Fixed ring; 305. Annular groove; 4. Support mechanism; 401. Sleeve; 402. Base; 403. Conical column; 404. Thread; 6. Jack; 7. Main beam; 8. Reference beam; 9. Support pier. DETAILED DESCRIPTION

[0023] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] According to an embodiment of the utility model, a static load test displacement testing device suitable for pile foundation is provided.

[0025] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-5 As shown, a static load test displacement testing device suitable for pile foundation according to an embodiment of the utility model includes a pile foundation 1, displacement detection mechanisms 2 are arranged on both sides of the top of the pile foundation 1, reference adjustment mechanisms 3 are arranged at both ends of the displacement detection mechanism 2, and a support mechanism 4 is arranged inside the bottom end of the reference adjustment mechanism 3.

[0026] With the aid of the above-mentioned technical scheme of the utility model, the utility model can perform multi-point displacement tests on pile foundations of different sizes through the coordinated arrangement of the displacement detection mechanism 2, the reference adjustment mechanism 3 and the support mechanism 4, thereby obtaining more comprehensive displacement data, and then more accurately judging the displacement characteristics and deformation trends of the pile foundation, providing more information for engineering design and safety assessment.

[0027] In one embodiment, for the above-mentioned displacement detection mechanism 2, the displacement detection mechanism 2 includes a plurality of displacement detectors 201 arranged on one side of the top of the pile foundation 1, a moving block 202 is arranged at one end of the displacement detector 201, a plurality of connecting columns 209 are penetrated through one side of the moving block 202, a semicircular groove 203 is provided on the side wall of one end of the moving block 202, a slot shaft 204 is arranged inside the semicircular groove 203, a plurality of cam grooves 205 are provided on the outer side of the slot shaft 204, and the plurality of cam grooves 205 are symmetrically arranged with the center line of the slot shaft 204 as the symmetry axis, and the cam grooves 205 on the same side are arranged in an inclined manner from the end of the slot shaft 204 to the middle ... The inclination angle of the groove 205 gradually decreases from the end of the groove shaft 204 to the middle; a follower column 206 matching the cam groove 205 is arranged inside the semicircular groove 203, and both ends of the groove shaft 204 are provided with a limit plate 207 sleeved on the outside of the connecting column 209, and the cross-section of the limit plate 207 is a square structure. A handle 208 is arranged at one end of the groove shaft 204. Under the rotation of the handle 208 and the limiting action of the cam groove 205 and the connecting column 209, the distance between the displacement detectors 201 can be appropriately adjusted according to the size of the pile foundation, so that the displacement testing device can be suitable for multi-point displacement testing of pile foundations of different sizes.

[0028] The working principle of the displacement detection mechanism 2 is as follows: the staff rotates the handle 208 to drive the groove shaft 204 to rotate. Due to the cooperation of the cam groove 205 and the follower column 206, and the limiting action of the limit plate 207 and the connecting column 209, the moving block 202 moves in the horizontal direction of the connecting column 209, thereby driving the displacement detector 201 to move in the horizontal direction of the connecting column 209. Due to the different inclination angles of each cam groove 205, the spacing between the cam grooves 205 at the same horizontal position is different, so that the displacement detector 201 can adjust the spacing appropriately according to the length of the top side of the pile foundation 1, so that the displacement detector 201 is evenly set on the top side of the pile foundation 1, and then realizes multi-point displacement testing of piles of different sizes, which can more comprehensively test the displacement of the surface of the pile foundation 1 and determine whether the pile foundation 1 is evenly descending or tilted during the descent.

[0029] In addition, it should be noted that the displacement detector 201 is configured as a laser sensor, and the principle of the laser sensor is mainly based on the characteristics of the laser for measurement. Specifically, the laser sensor is composed of a laser transmitter, a receiver, and a timer. The laser transmitter emits a laser beam, which is focused by a lens and irradiated onto the target object. When the laser beam irradiates the target object and is reflected back, the receiver receives the reflected laser beam. The laser sensor calculates the distance between the target object and the sensor by measuring the time difference from the emission to the reception of the laser beam. Since the speed of light is known, the distance of the target object can be calculated by this time difference.

[0030] In one embodiment, for the above-mentioned reference adjustment mechanism 3, the reference adjustment mechanism 3 includes a limit block 301 arranged at the end of the connecting column 209, a threaded rod 302 is penetrated through the top of the limit block 301, a rotating ring 303 is arranged at the top of the threaded rod 302, a fixing ring 304 is arranged at the outer top of the threaded rod 302, and an annular groove 305 matched with the fixing ring 304 is opened at the top of the limit block 301. Under the rotation action of the rotating ring 303, the threaded rod 302 can be driven to rotate, and under the limiting action of the annular groove 305, the limit block 301 moves up and down until the connecting column 209 connected to the limit block 301 is adjusted to a horizontal state, thereby realizing the horizontal placement of the displacement detection mechanism 2.

[0031] In one embodiment, for the above-mentioned support mechanism 4, the support mechanism 4 includes a sleeve 401 arranged at the bottom of the limit block 301, a base 402 is arranged at the bottom end of the sleeve 401, and conical columns 403 are arranged at the four corners of the bottom end of the base 402. The top of the sleeve 401 is provided with a thread 404 that matches the threaded rod 302, which can ensure that the base 402 is placed close to the ground under the action of the conical column 403 inserted into the soil.

[0032] The working principle of the reference adjustment mechanism 3 and the support mechanism 4 is as follows: the staff inserts the conical column 403 into the ground so that the base 402 is placed tightly on the ground, and then the staff rotates the rotating ring 303 to make the threaded rod 302 rotate in the sleeve 401. Due to the cooperation of the fixing ring 304 and the annular groove 305, the limit block 301 and the threaded rod 302 move up and down synchronously until the connecting column 209 is adjusted to a horizontal state, thereby realizing that the displacement test device is in a horizontal state.

[0033] In addition, in specific applications, the above-mentioned displacement testing device is used in the static load test of the pile foundation 1, so after placing the displacement testing device, it is also necessary to prepare for the static load test of the pile foundation 1, such as a jack 6 is arranged in the middle of the top of the pile foundation 1, a main beam 7 is arranged at the end of the jack 6, a plurality of reference beams 8 are arranged at the top of the main beam 7, and support piers 9 are arranged on both sides of the bottom end of the main beam 7.

[0034] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0035] In actual application, the user places the displacement detection mechanism 2 (the working principle of the displacement detection mechanism 2 is as described above) firmly on one side of the pile foundation 1 through the support mechanism 4 (the working principle of the support mechanism 4 is as described above), and then adjusts the displacement test device to a horizontal state by rotating the reference adjustment mechanism 3 (the working principle of the reference adjustment mechanism 3 is as described above), and then adjusts the distance between the displacement detectors 201 by rotating the displacement detection mechanism 2 (the working principle of the displacement detection mechanism 2 is as described above), and then the user prepares a static load test for the pile foundation 1, and after the preparation is completed, the displacement test of the pile foundation 1 is performed through the displacement detection mechanism 2.

[0036] In summary, with the aid of the above technical solution of the utility model, through the coordinated setting of the displacement detection mechanism 2, the reference adjustment mechanism 3 and the support mechanism 4, multi-point displacement tests can be performed on pile foundations of different sizes, so as to obtain more comprehensive displacement data, and then the displacement characteristics and deformation trends of the pile foundation can be more accurately judged, and more information can be provided for engineering design and safety assessment; by setting the displacement detection mechanism 2, the distance between the displacement detectors 201 can be appropriately adjusted according to the size of the pile foundation under the rotation action of the handle 208 and the limiting action of the cam groove 205 and the connecting column 209, so that the displacement test device can be suitable for multi-point displacement tests of pile foundations of different sizes; by setting the coordinated setting of the reference adjustment mechanism 3 and the support mechanism 4, the threaded rod 302 can be driven to rotate inside the sleeve 401 under the rotation action of the rotating ring 303, and the limit block 301 can be moved up and down under the limiting action of the annular groove 305 until the connecting column 209 connected to the limit block 301 is adjusted to a horizontal state, thereby realizing the horizontal placement of the displacement detection mechanism 2.

[0037] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0038] 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 protection scope of the present invention.

Claims

1. A static load test displacement test device suitable for a pile foundation, comprising a pile foundation (1), characterized in that: Displacement detection mechanisms (2) are provided on both sides of the top of the pile foundation (1), reference adjustment mechanisms (3) are provided at both ends of the displacement detection mechanism (2), and a support mechanism (4) is provided inside the bottom end of the reference adjustment mechanism (3); The displacement detection mechanism (2) comprises a plurality of displacement detectors (201) arranged on one side of the top end of the pile foundation (1); a moving block (202) is arranged at one end of the displacement detector (201); a plurality of connecting columns (209) are arranged through one side of the moving block (202); a semicircular groove (203) is provided on a side wall at one end of the moving block (202); a groove shaft (204) is arranged inside the semicircular groove (203); A plurality of cam grooves (205) are provided on the outer side of the groove shaft (204), and the plurality of cam grooves (205) are symmetrically arranged with the center line of the groove shaft (204) as the symmetry axis. The cam grooves (205) on the same side are arranged to be inclined in sequence from the end of the groove shaft (204) to the middle, and the inclination angle of the cam grooves (205) on the same side gradually decreases from the end of the groove shaft (204) to the middle; A follower column (206) matched with the cam groove (205) is arranged inside the semicircular groove (203), and both ends of the groove shaft (204) are provided with a limit plate (207) sleeved on the outside of the connecting column (209), and the cross section of the limit plate (207) is a square structure, and a handle (208) is arranged at one end of the groove shaft (204); The reference adjustment mechanism (3) comprises a limit block (301) arranged at the end of the connecting column (209), a threaded rod (302) is provided through the top of the limit block (301), a rotating ring (303) is provided at the top of the threaded rod (302), a fixing ring (304) is provided at the top of the outer side of the threaded rod (302), and an annular groove (305) matching with the fixing ring (304) is provided at the top of the limit block (301).

2. A static load test displacement testing device suitable for pile foundation according to claim 1, characterized in that: The support mechanism (4) comprises a sleeve (401) arranged at the bottom of the limit block (301), a base (402) is arranged at the bottom end of the sleeve (401), and conical columns (403) are arranged at the four corners of the bottom end of the base (402).

3. A static load test displacement testing device suitable for pile foundation according to claim 2, characterized in that: The top end of the sleeve (401) is provided with a thread (404) that matches the threaded rod (302).

Images