A pile horizontal load test detection device
The pile foundation horizontal load test device uses engineering piles with adjustable force transmission cylinders and spherical hinges to perform horizontal load testing, reducing costs and preventing soil bearing capacity damage by eliminating the need for a reaction wall.
Patent Information
- Application Number
- CN202110033719.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-01-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2041-01-12
AI Technical Summary
Existing horizontal load test methods for pile foundations require the construction of a reaction wall, which is time-consuming, labor-intensive, and can damage the bearing capacity of the original soil.
A pile foundation horizontal load test detection device that utilizes engineering piles on site, employing a reaction force mechanism with adjustable force transmission cylinders and spherical hinges to clamp and abut against the piles, eliminating the need for a reaction wall.
The solution reduces the cost and effectively addresses the challenges of high cost and soil bearing capacity damage by using existing engineering piles, allowing for efficient and cost-effective horizontal load testing without constructing a reaction wall.
Smart Images
Figure CN112627247B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of horizontal static load test of pile foundations, and in particular relates to a detection device for horizontal load test of pile foundations. Background Art
[0002] There are many forms of horizontal loads on foundation piles. The single pile horizontal static load test uses a test method close to the actual working conditions of the horizontally loaded pile to determine the horizontal critical load and ultimate load of the single pile and the thrust soil resistance parameters. The foundation pile horizontal load test detection device mainly includes a horizontal thrust loading device and a measuring device. Among them, the horizontal thrust loading device generally uses a horizontal hydraulic jack with a loading capacity greater than 1.2 times the maximum test load. The load size is directly measured by a force sensor. The hydraulic pressure can also be measured by a hydraulic gauge or a hydraulic sensor in a parallel liquid circuit. The load is converted according to the jack calibration curve. The single pile horizontal static load test uses a unidirectional multi-cycle loading method or a slow load maintenance valve according to the actual stress characteristics of the engineering pile. For engineering piles that are subjected to horizontal loads for a long time, the slow load maintenance method should be used. A large number of displacement meters should be used for measuring horizontal displacement in the measuring device. Two displacement meters should be symmetrically installed on both sides of the inspected pile in the horizontal action plane to measure the horizontal displacement of the pile at the ground. When it is necessary to measure the top (rotation) angle of the pile, two displacement meters should be symmetrically installed on both sides of the inspected pile 50 cm above the horizontal force action surface. The rotation angle of the pile above the bottom surface can be obtained by using the ratio of the difference between the upper and lower displacement meters and the distance between the displacement meters.
[0003] For example, the invention patent with application number 201910035479.5 discloses a high pile compression, pull-out and horizontal static load test equipment, including three sub-items of compression, pull-out and horizontal static load test: The three sub-items of the static load test equipment of the high pile foundation all include three modules: reaction module, loading module and monitoring module. The reaction module provides reaction support for compression, pull-out and horizontal static load tests to balance the added load, the loading module is used to provide test loading, and the monitoring module is used to measure the horizontal or vertical deformation of the high pile during loading, so as to judge the deformation characteristics of the pile foundation and evaluate the bearing capacity of the pile foundation.
[0004] For another example, the utility model patent with application number 201720162904.3 discloses a horizontal static load test system for applying a vertical load on the pile top, including a vertical compressive static load test device and a horizontal static load test device; the loading and pressure stabilization system of the horizontal static load test device includes a horizontal jack for applying a horizontal load, a jack fixing device and a horizontal load measuring instrument and equipment, the horizontal jack for applying a horizontal load is connected to the vertical compressive static load test pile through the jack fixing device, and the horizontal load measuring instrument and equipment is installed between the horizontal jack for applying a horizontal load and the vertical compressive static load test pile); during the horizontal force application process of the horizontal static load test, the constraint of the vertical load on the horizontal direction of the pile top is overcome by the anti-friction component installed on the top of the vertical compressive static load test pile; the horizontal static load test device includes a horizontal displacement observation instrument and equipment), and the horizontal displacement observation instrument and equipment is connected to the vertical compressive static load test pile and the reference beam.
[0005] For another example, the utility model patent with application number 201920269210.9 discloses a pile foundation horizontal load test detection device, including a testing mechanism and a fixing mechanism, one side of the testing mechanism is a force-applying mechanism, the force-applying mechanism includes a force-applying rod to apply external force to the test pile, the fixing mechanism includes a fixing ring and an abutment member arranged around the outside of the test pile; a number of clamping blocks are evenly fixedly installed on the inner side of the abutment member, a number of clamping grooves that cooperate with the clamping blocks are evenly opened on the outer surface of the fixing ring away from the fastening mechanism, the abutment member is inserted into the interior of the clamping groove through the clamping block, and the outer side of the abutment member is fixedly connected to the force-applying rod through a connecting member; the front and rear sides of the clamping block are fixedly connected to the inner wall of the clamping groove through a first elastic member and a second elastic member respectively.
[0006] However, in the prior art, in order to realize the force of the jack (force-adding device), a reaction device needs to be installed. The reaction device includes a construction reaction wall and engineering piles. However, the reaction wall is not only time-consuming and labor-intensive to construct, but also time-consuming and labor-intensive to remove. At the same time, the reaction wall is also easy to destroy the bearing capacity of the original soil. Summary of the invention
[0007] In order to solve the problems of high cost and damage to the bearing capacity of the original soil in the on-site construction of the reaction wall during the horizontal load test of the pile foundation, the present invention provides a pile foundation horizontal load test detection device, which fully utilizes the engineering piles at the construction site without damaging the bearing capacity of the engineering piles and the original soil, and can greatly reduce the cost of the pile foundation horizontal load test.
[0008] In order to solve the technical problem, the technical solution adopted by the present invention is:
[0009] A pile foundation horizontal load test detection device is characterized in that it includes a reaction force mechanism, which includes a support part, and at least two force transmission cylinders with adjustable lengths are connected to the support part, one end of each force transmission cylinder is interconnected with the support part, and the other end of the force transmission cylinder is connected to a spherical hinge, and the spherical hinge is connected to a clamping part for contacting and abutting against the engineering pile.
[0010] In some embodiments, one side of the support portion is connected to the force transmission cylinder, the other side of the support portion is connected to a horizontal jack, one end of the horizontal jack is connected to the support portion, the other end of the horizontal jack is connected to a spherical hinge, and the spherical hinge is connected to a clamping portion for clamping and resisting against a foundation pile for horizontal load test.
[0011] In some embodiments, the force transmission cylinder includes a first cylinder body, which has an adjustment threaded hole along the length direction of the first cylinder body, and the adjustment threaded hole is equipped with an adjustment screw, one end of the adjustment screw is inserted into the adjustment threaded hole, and the other end of the adjustment screw is rotatably connected to a spherical hinge.
[0012] In some embodiments, the force transmission cylinder includes a first cylinder body, a slide groove is opened on the first cylinder body along the length direction of the first cylinder body, the slide groove is equipped with a slide rod, one end of the slide rod is adapted to the slide groove, and the other end of the slide rod is connected to a spherical hinge.
[0013] In some embodiments, the horizontal position of the force transmission cylinder on the support portion is adjustable.
[0014] In some embodiments, the height positions of the horizontal jack, the support portion and the force transmission cylinder are adjustable.
[0015] In some embodiments, the supporting portion includes a crossbeam, which is also provided with a plurality of threaded holes. The force transmission cylinder is threadedly connected to the threaded holes on the crossbeam via a screw and is installed on different threaded holes to achieve adjustment of the horizontal position of the force transmission cylinder on the crossbeam; or a sliding groove is provided on the crossbeam, one end of the force transmission cylinder cooperates with the sliding groove and can slide in the sliding groove, and the force transmission cylinder or the crossbeam is provided with a locking screw and a locking nut for locking the force transmission cylinder in the sliding groove.
[0016] In some embodiments, the lower end surfaces of the crossbeam, the horizontal jack and the force transmission cylinder are connected with a height-adjustable telescopic rod, and the lower end of the telescopic rod is connected with a roller.
[0017] In some embodiments, the clamping portion is an arc-shaped plate, the center of the arc-shaped plate connected to the spherical hinge on the force transmission cylinder faces the engineering pile, and the center of the arc-shaped plate connected to the spherical hinge on the horizontal jack faces the foundation pile for horizontal load test.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] When the foundation pile horizontal load test detection device of the present invention is used, according to the distance position of the engineering piles on the construction site, the position of each force transmission cylinder on the support part (crossbeam) is adjusted, and then the clamping part on each force transmission cylinder is clamped and abutted with the engineering pile, and then the clamping part of the horizontal jack is clamped and abutted with the foundation pile for horizontal load test detection; then the height of the horizontal jack, the support part (crossbeam) and the force transmission cylinder is adjusted, and finally the length of the force transmission cylinder is adjusted, so that the clamping part on the force transmission cylinder is tightly against the engineering pile, and the clamping part on the horizontal jack is tightly against the foundation pile, and then the horizontal jack is started to work, so as to perform horizontal load test detection on the foundation pile. The reaction mechanism of the present invention makes full use of the engineering piles on site, and uses at least two engineering piles on site at the same time, so that it is not necessary to construct a reaction wall, and at the same time, it will not damage the bearing capacity of the engineering piles on site and the original soil, thereby reducing the cost of the foundation pile horizontal load test.
[0020] At the same time, the height positions of the horizontal jack, the support part (crossbeam) and the force transmission cylinder of the present invention can be adjusted, the horizontal position of the force transmission cylinder on the support part can also be adjusted, and the length of the force transmission cylinder can also be adjusted, so that it can be adjusted according to the arrangement of the on-site engineering piles, and has the characteristics of easy adjustment and easy use. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;
[0022] Figure 2 It is a structural schematic diagram of an embodiment of the present invention when the crossbeam is connected to the force transmission cylinder;
[0023] Figure 3 It is a structural schematic diagram of an embodiment of the present invention when the crossbeam is connected to the force transmission cylinder;
[0024] Figure 4 It is a structural schematic diagram of another embodiment of the force transmission cylinder of the present invention;
[0025] Figure 5 It is a structural schematic diagram of an embodiment of the present invention;
[0026] Markings in the figure: 01, foundation pile, 02, engineering pile, 1, support part, 11, crossbeam, 12, sliding groove, 13, locking nut, 14, threaded hole, 15, screw, 16, telescopic rod, 17, roller, 2, force transmission cylinder, 21, first cylinder, 22, adjusting threaded hole, 23, adjusting screw, 24, fastening nut, 25, sliding groove, 26, sliding rod, 3, ball hinge, 4, arc plate, 41, locking screw. DETAILED DESCRIPTION
[0027] The present invention is further described below in conjunction with embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.
[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Combined with Figure 1 The pile foundation horizontal load test detection device of the present invention comprises a reaction force mechanism, which comprises a support part 1, to which at least two force transmission cylinders 2 with adjustable lengths are connected, one end of each force transmission cylinder 2 is interconnected with the support part 1, and the other end of the force transmission cylinder 2 is connected with a spherical hinge 3, to which a clamping part for contacting and abutting against the engineering pile 02 is connected.
[0030] In some embodiments, one side of the support portion 1 is connected to the force transmission cylinder 2, the other side of the support portion 1 is connected to a horizontal jack 5, one end of the horizontal jack 5 is connected to the support portion 1, the other end of the horizontal jack 5 is connected to a spherical hinge 3, and the spherical hinge 3 is connected to a clamping portion for clamping and resisting the foundation pile 01 for horizontal load test.
[0031] In some embodiments, the clamping part is an arc plate 4, the center of the arc plate 4 connected to the ball hinge 3 on the force transmission cylinder 2 faces the engineering pile 02, and the center of the arc plate 4 connected to the ball hinge 3 on the horizontal jack 5 faces the foundation pile 01 for horizontal load test. In some embodiments, the arc plate 4 is also provided with a locking screw 41, and the arc plate 4 is locked with the engineering pile 02 and the foundation pile 01 by the locking screw 41.
[0032] Combined with Figure 1 In some embodiments, the force transmission cylinder 2 includes a first cylinder 21, and an adjusting threaded hole 22 is provided on the first cylinder 21 along the length direction of the first cylinder 21. The adjusting threaded hole 22 is provided with an adjusting screw 23, one end of the adjusting screw 23 is inserted into the adjusting threaded hole 22, and the other end of the adjusting screw 23 is rotatably connected to the ball hinge 3. The length of the force transmission cylinder is adjusted by the threaded connection between the adjusting screw and the first cylinder. In some embodiments, the outer periphery of the adjusting screw 23 that penetrates into the first cylinder 21 is also provided with a tightening nut 24, so as to further lock the adjusting screw 23 to prevent it from loosening during the test and detection process.
[0033] Combined with Figure 4 In some embodiments, the force transmission cylinder 2 includes a first cylinder 21, a slide groove 25 is provided on the first cylinder 21 along the length direction of the first cylinder, the slide groove 25 is provided with a slide rod 26, one end of the slide rod 26 is adapted to the slide groove 25, and the other end of the slide rod 26 is connected to the ball hinge 3. That is to say, the force transmission cylinder 2 of the present application can also adopt the form of a slide groove 25 and a slide rod 26 to achieve the adjustment of the length of the force transmission cylinder, wherein the first cylinder 21 or the slide rod 22 is provided with a locking screw 41 and a locking nut for locking the slide rod 26 in the slide groove 25.
[0034] In some embodiments, the horizontal position of the force transmission cylinder 2 on the support portion 1 is adjustable.
[0035] Combined with Figure 2 In some embodiments, the support portion 1 includes a crossbeam 11, a step-shaped sliding groove 12 is provided on the crossbeam 11, a first cylinder 21 extends into the sliding groove 12 toward one side of the crossbeam 11 and is adapted to the sliding groove 12, a locking screw 41 is also connected to the first cylinder 21 extending into the sliding groove 12, the locking screw 41 passes through the crossbeam 11 and is provided with a locking nut 13, and the first cylinder 21 is locked in the sliding groove of the crossbeam through the mutual cooperation of the locking screw 41 and the locking nut 13. In order to facilitate the passing of the locking screw 41 and cooperate with the sliding of the first cylinder 21 in the sliding groove 12, a strip-shaped through hole is provided on the crossbeam 11 at a position corresponding to the locking screw 41, and the locking screw 41 can pass through the strip-shaped through hole and be fastened with the locking nut 13. Thereby, the locking screw 41 can follow the first cylinder 21 to slide normally in the sliding groove 12, thereby adjusting the position of the first cylinder 21 in the sliding groove 12, and after the horizontal position of the first cylinder 21 is adjusted, the first cylinder 21 can be locked in the sliding groove 12 by the locking screw 41 and the locking nut 13.
[0036] Combined with Figure 3In some embodiments, the support portion 1 includes a crossbeam 11, which is also provided with a plurality of threaded holes 14. The force transmission cylinder 2 (first cylinder 21) is threadedly connected to the threaded holes 14 on the crossbeam via a screw 15 and is installed on different threaded holes 14 to adjust the horizontal position of the force transmission cylinder 2 on the crossbeam 11.
[0037] In some embodiments, the height positions of the horizontal jack, the support portion and the force transmission cylinder are adjustable.
[0038] Combined with Figure 5 In some embodiments, the lower end surfaces of the crossbeam 11, the horizontal jack 5 and the force transmission cylinder 2 are connected with a height-adjustable telescopic rod 16, and the lower end of the telescopic rod 16 is connected with a roller 17. The telescopic rod 16 and the roller 17 can be used to adjust the height, which can be applied to different detection scenarios and is also convenient for carrying the equipment.
[0039] The structure of the telescopic rod 16 belongs to the prior art product, which can be understood by those skilled in the art and will not be described in detail here.
[0040] When the foundation pile horizontal load test detection device of the present invention is used, according to the distance position of the engineering piles on the construction site, the position of each force transmission cylinder on the support part (crossbeam) is adjusted, and then the clamping part on each force transmission cylinder is clamped and abutted with the engineering pile, and then the clamping part of the horizontal jack is clamped and abutted with the foundation pile for horizontal load test detection; then the height of the horizontal jack, the support part (crossbeam) and the force transmission cylinder is adjusted, and finally the length of the force transmission cylinder is adjusted, so that the clamping part on the force transmission cylinder is tightly against the engineering pile, and the clamping part on the horizontal jack is tightly against the foundation pile, and then the horizontal jack is started to work, so as to perform horizontal load test detection on the foundation pile. The reaction mechanism of the present invention makes full use of the engineering piles on site, and uses at least two engineering piles on site at the same time, so that it is not necessary to construct a reaction wall, and the engineering piles on site will not be damaged, thereby reducing the cost of the foundation pile horizontal load test.
[0041] At the same time, the height positions of the horizontal jack, the support part (crossbeam) and the force transmission cylinder of the present invention can be adjusted, the horizontal position of the force transmission cylinder on the support part can also be adjusted, and the length of the force transmission cylinder can also be adjusted, so that it can be adjusted according to the arrangement of the on-site engineering piles, and has the characteristics of easy adjustment and easy use.
[0042] The above is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and evolutions of the technical content disclosed above, which are equivalent / embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A pile horizontal load test detection device, characterized in that: The reaction mechanism comprises a support part, and at least two force transmission cylinders with adjustable lengths are connected to the support part, one end of each force transmission cylinder is interconnected with the support part, and the other end of the force transmission cylinder is connected to a spherical hinge, and the spherical hinge is connected to a clamping part for contacting and abutting against the engineering pile; one side of the support part is connected to the force transmission cylinder, and the other side of the support part is connected to a horizontal jack, one end of the horizontal jack is connected to the support part, and the other end of the horizontal jack is connected to a spherical hinge, and the spherical hinge is connected to a clamping part for clamping and abutting against the foundation pile for horizontal load test; the support part comprises a crossbeam, and a plurality of threaded holes are also provided on the crossbeam, and the force transmission cylinder is connected to the support part through a screw. The threaded holes on the crossbeam are threadedly connected and the horizontal position of the force transmission cylinder on the crossbeam can be adjusted by being installed on different threaded holes; or a sliding groove is opened on the crossbeam, one end of the force transmission cylinder cooperates with the sliding groove and can slide in the sliding groove, and the force transmission cylinder or the crossbeam is equipped with a locking screw and a locking nut for locking the force transmission cylinder in the sliding groove; the lower end faces of the crossbeam, horizontal jack and force transmission cylinder are connected with a height-adjustable telescopic rod, and the lower end of the telescopic rod is connected with a roller; the clamping part is an arc plate, the center of the arc plate connected to the spherical hinge on the force transmission cylinder faces the engineering pile, and the center of the arc plate connected to the spherical hinge on the horizontal jack faces the foundation pile for horizontal load test.
2. The pile horizontal load test detection device according to claim 1, characterized in that: The force transmission cylinder includes a first cylinder body, which is provided with an adjustment threaded hole along the length direction of the first cylinder body. The adjustment threaded hole is equipped with an adjustment screw, one end of the adjustment screw is inserted into the adjustment threaded hole, and the other end of the adjustment screw is rotatably connected to the ball hinge.
3. The pile horizontal load test detection device according to claim 1, characterized in that: The force transmission cylinder comprises a first cylinder body, a slide groove is provided on the first cylinder body along the length direction of the first cylinder body, the slide groove is provided with a slide rod, one end of the slide rod is adapted to the slide groove, and the other end of the slide rod is connected to a spherical hinge.