Static load test device for pile foundation detection

Abstract

The utility model belongs to the technical field of pile foundation detection, and particularly relates to a static load test device for pile foundation detection, which comprises at least two groups of support frames erected on the ground and uniformly distributed in the circumferential direction based on the circle center of a pile foundation; the main beam is erected above the supporting frame, and a jack is arranged between the main beam and the pile foundation; the pull rods are arranged between the supporting frame and the main beam and are symmetrically arranged; the anchor rod is arranged in the ground in an inserted mode, and the anchor rod is connected with the supporting frame; the expansion mechanisms are embedded in the outer wall of the anchor rod, and a plurality of groups of expansion mechanisms are uniformly distributed in the circumferential direction of the axis of the anchor rod; the reset structure is arranged between the expansion mechanism and the anchor rod and used for driving the expansion mechanism to retract into the anchor rod; wherein the expansion mechanism is movably arranged. And the effect that the anchor rod is convenient to recycle after the test is finished is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile foundation detection, and in particular relates to a static load test device for pile foundation detection. Background Art

[0002] Pile foundation testing is one of the key steps to ensure the safety of building structures. It is used to evaluate the bearing capacity and integrity of pile foundations. Traditional pile foundation testing methods include static load test (SLT) and dynamic penetration test. Among them, static load test is considered to be the most direct and reliable method because it simulates the actual structural load conditions.

[0003] Chinese invention patent CN110130417A discloses a static load detection device and method for anchor piles that are easy to fix, including a jack and a load-bearing frame, the jack is installed at the center position of the bottom wall of the load-bearing frame, and a plurality of anchor rods are symmetrically arranged at the edge position of the load-bearing frame. The anchor rods are connected to the load-bearing frame through a fixing device, and the anchor rods include a rod body, a plurality of reinforcement rods installed on the side wall of the rod body, and a clamping rod installed in the rod body. The reinforcement rods are rotatably connected to the rod body, and a connecting rod is provided between the reinforcement rods and the clamping rods. The connecting rods are rotatably connected to the reinforcement rods and the clamping rods. The present invention can provide an anchor rod that is easy to insert into the ground and can be reinforced with the ground to lift it in the direction it can lift, so that it can be easily detected, thereby improving its work efficiency.

[0004] However, the circumferentially extended reinforcement rods in the device can increase the reverse force of the anchor rod, but when the anchor rod is recovered, the soil is easily blocked in the receiving groove that should accommodate the reinforcement rod, making the reinforcement rod unable to be recovered normally, thereby increasing the difficulty of anchor rod recovery. Utility Model Content

[0005] The purpose of the utility model is to provide a static load test device for pile foundation detection in view of the above-mentioned technical problems, so as to achieve the effect of facilitating the recovery of anchor rods after the test.

[0006] In view of this, the utility model provides a static load test device for pile foundation detection, which is characterized by comprising:

[0007] A support frame, wherein the support frame is erected on the ground and has at least two groups uniformly distributed in the circumferential direction based on the center of the pile foundation;

[0008] A main beam, wherein the main beam is erected above the support frame, and a jack is arranged between the main beam and the pile foundation;

[0009] A pull rod, which is arranged between the support frame and the main beam and is symmetrically arranged;

[0010] Anchor rods, which are inserted into the ground and connected to the support frame;

[0011] An expansion mechanism, wherein the expansion mechanism is embedded in the outer wall of the anchor rod, and a plurality of groups of the expansion mechanism are evenly distributed circumferentially based on the axis of the anchor rod;

[0012] A reset structure, which is arranged between the expansion mechanism and the anchor rod and is used to drive the expansion mechanism to retract the anchor rod;

[0013] Wherein, the expansion mechanism is movably arranged.

[0014] In this technical solution, a jack is installed on the top of the pile foundation to be tested, an anchor rod is inserted into the soil through the equipment, and the top of the anchor rod is connected to the support frame. The main beam and the support frame can be connected by the provided pull rod. After the anchor rod is inserted into the ground, the provided expansion mechanism can protrude from the outer wall of the anchor rod, increase the adhesion between the anchor rod and the soil, and help to increase the reverse force provided to the support frame. After the test is completed, the provided reset structure can retract the expansion mechanism into the anchor rod, which is convenient for the recovery of the anchor rod and enables the anchor rod to be reused, which is conducive to reducing the cost of the pile foundation static load detection test.

[0015] In the above technical solution, further, the expansion mechanism includes:

[0016] A cavity, wherein the cavity is arranged along the axis of the anchor rod, and a push rod is slidably arranged in the cavity;

[0017] The receiving grooves are evenly distributed on the outer wall of the anchor rod in the circumferential direction, and a movable block is slidably arranged in the receiving grooves;

[0018] A connecting groove, wherein the connecting groove is arranged between the cavity and the containing groove, and a push block is slidably arranged in the connecting groove, and the push block is fixedly connected to the movable block;

[0019] Wherein, the top surface of the push block is provided with an inclined surface, and the inclined surface contacts the bottom surface of the push rod.

[0020] In the present technical solution, when the anchor rod needs to be expanded to increase the anchoring force, the push rod is pushed downward in the cavity, and the linear motion of the push rod is converted into radial motion of the push block through the mechanical action of the inclined surface, thereby pushing the movable block to move outward along the accommodating groove, so that the movable block protrudes from the outer wall of the anchor rod, thereby increasing the contact area and friction between the anchor rod and the surrounding ground, and improving the stability of anchoring.

[0021] In the above technical solution, further, the bottom surface of the push rod is conical.

[0022] In the technical solution, the conical bottom surface may reduce the friction when contacting with the inclined surface of the push block, thereby making the movement of the push rod smoother and reducing the wear or jamming caused by excessive friction.

[0023] In the above technical solution, further, the reset structure includes:

[0024] A sliding groove, wherein the sliding groove is symmetrically arranged on the upper and lower surfaces of the connecting groove;

[0025] A fixed block, wherein the fixed block is symmetrically arranged on the push block, and the fixed block is slidably connected to the sliding groove;

[0026] Wherein, a compression spring is arranged between the fixing block and the sliding slot.

[0027] In the present technical solution, during the expansion process, the push rod moves downward, and pushes the push block toward the outer wall of the anchor rod through the conical bottom surface. At the same time, the compression spring is compressed. When the anchor rod is recovered, the push rod moves upward, and the compression spring can push the fixed block toward the axis of the anchor rod, thereby resetting the expansion mechanism, so that the expansion mechanism can be reused and is easy to operate, thereby improving the reliability and work efficiency of the device.

[0028] In the above technical solution, further, the anchor rod is modularly arranged, and the modules are detachably connected.

[0029] In this technical solution, the modular anchor rod can reduce the volume and weight of a single piece, making it easier to transport and carry it to the construction site. The detachable design allows construction workers to adjust the total length and performance of the anchor rod according to actual conditions to adapt to different engineering requirements.

[0030] In the above technical solution, further, the detachable connection is a snap-fit ​​connection, and is reinforced by bolts at the snap-fit ​​location.

[0031] In this technical solution, the snap-fit ​​connection combined with bolt reinforcement can take into account both the convenience of construction and the reliability of connection, while reducing the difficulty of maintenance and improving the performance and service life of the entire system.

[0032] In the above technical solution, further, a plurality of protrusions are arranged on the outer wall of the movable block, and the protrusions are arranged in a trapezoidal shape.

[0033] In the technical solution, the trapezoidal protrusions can more effectively push away the surrounding soil or rock during expansion, so that the anchor rod can reach the required expansion degree under lower pressure, thereby improving the efficiency of the entire expansion process.

[0034] The beneficial effects of the utility model are:

[0035] 1. After the anchor rod is inserted into the ground, the expansion mechanism can protrude from the outer wall of the anchor rod, increasing the adhesion between the anchor rod and the soil, which is conducive to improving the reverse force provided to the support frame. After the test, the expansion mechanism can be retracted into the anchor rod through the reset structure, which is convenient for the recovery of the anchor rod and enables the anchor rod to be reused, which is conducive to reducing the cost of the pile foundation static load detection test.

[0036] 2. The modularized anchor rod can reduce the volume and weight of a single piece, making it easier to transport and carry it to the construction site. The detachable design allows construction personnel to adjust the total length and performance of the anchor rod according to actual conditions to meet different engineering requirements.

[0037] 3. The trapezoidal protrusions can more effectively push away the surrounding soil or rock during expansion, so that the anchor rod can reach the required expansion degree under lower pressure, thereby improving the efficiency of the entire expansion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0039] Figure 2 It is a three-dimensional schematic diagram of the anchor rod of the utility model;

[0040] Figure 3 It is a schematic diagram of an anchor rod without load in the utility model;

[0041] Figure 4 It is a schematic diagram of the anchor rod working of the utility model;

[0042] Figure 5 This utility model Figure 3 A magnified image of area A;

[0043] The symbols in the figure are:

[0044] 1. Support frame; 2. Main beam; 3. Jack; 4. Pull rod; 5. Anchor rod; 6. Expansion mechanism; 601. Cavity; 602. Accommodating groove; 603. Connecting groove; 604. Movable block; 605. Push block; 606. Push rod; 7. Reset structure; 701. Sliding groove; 702. Fixed block; 703. Compression spring; 10. Pile foundation; 11. Bolt; 12. Bump. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0046] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0048] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0049] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0050] Embodiment 1:

[0051] Depend on Figure 1-Figure 5 As shown, this embodiment provides a static load test device for pile foundation detection, including: a support frame 1, the support frame 1 is erected on the ground, and at least two groups are evenly distributed circumferentially based on the center of the pile foundation 10; a main beam 2, the main beam 2 is erected above the support frame 1, and a jack 3 is arranged between the main beam 2 and the pile foundation 10; a pull rod 4, the pull rod 4 is arranged between the support frame 1 and the main beam 2, and is symmetrically arranged; an anchor rod 5, the anchor rod 5 is inserted and arranged in the ground, and the anchor rod 5 is connected to the support frame 1; an expansion mechanism 6, the expansion mechanism 6 is embedded in the outer wall of the anchor rod 5, and a plurality of groups are evenly distributed circumferentially based on the axis of the anchor rod 5; a reset structure 7, the reset structure 7 is arranged between the expansion mechanism 6 and the anchor rod 5, and is used to drive the expansion mechanism 6 to retract the anchor rod 5; wherein, the expansion mechanism 6 is movably arranged.

[0052] Install the jack 3 to the top of the pile foundation 10 to be tested, insert the anchor rod 5 into the soil through the equipment, and connect the top of the anchor rod 5 to the support frame 1. The main beam 2 and the support frame 1 can be connected by the set pull rod 4. After the anchor rod 5 is inserted into the ground, the expansion mechanism 6 can protrude from the outer wall of the anchor rod 5 to increase the adhesion between the anchor rod 5 and the soil, which is beneficial to improve the reverse force provided to the support frame 1. After the test is completed, the expansion mechanism 6 can be retracted into the anchor rod 5 through the reset structure 7, which is convenient for the recovery of the anchor rod 5 and enables the anchor rod 5 to be reused, which is beneficial to reduce the cost of the static load detection test of the pile foundation 10.

[0053] Furthermore, the expansion mechanism 6 includes: a cavity 601, which is arranged along the axis of the anchor rod 5, and a push rod 606 is slidably arranged in the cavity 601; a receiving groove 602, which is evenly distributed circumferentially on the outer wall of the anchor rod 5, and a movable block 604 is slidably arranged in the receiving groove 602; a connecting groove 603, which is arranged between the cavity 601 and the receiving groove 602, and a push block 605 is slidably arranged in the connecting groove 603, and the push block 605 and the movable block 604 are fixedly connected; wherein, the top surface of the push block 605 is provided with an inclined surface, and the inclined surface contacts the bottom surface of the push rod 606.

[0054] When the anchor rod 5 needs to be expanded to increase the anchoring force, the push rod 606 is pushed downward in the cavity 601, and the linear motion of the push rod 606 is converted into radial motion of the push block 605 through the mechanical action of the inclined surface, thereby pushing the movable block 604 to move outward along the accommodating groove 602, so that the movable block 604 protrudes from the outer wall of the anchor rod 5, thereby increasing the contact area and friction between the anchor rod 5 and the surrounding ground, and improving the stability of the anchoring.

[0055] Furthermore, the bottom surface of the push rod 606 is conical, which can reduce the friction when contacting the inclined surface of the push block 605, thereby making the movement of the push rod 606 smoother and reducing the wear or stagnation caused by excessive friction.

[0056] Embodiment 2:

[0057] Depend on Figure 2-Figure 5 As shown, this embodiment provides a static load test device for pile foundation detection, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0058] Furthermore, the reset structure 7 includes: a sliding groove 701, which is symmetrically arranged on the upper and lower surfaces of the connecting groove 603; a fixed block 702, which is symmetrically arranged on the push block 605, and the fixed block 702 and the sliding groove 701 are slidably connected; wherein a compression spring 703 is arranged between the fixed block 702 and the sliding groove 701.

[0059] During the expansion process, the push rod 606 moves downward and pushes the push block 605 toward the outer wall of the anchor rod 5 through the conical bottom surface. At the same time, the compression spring 703 is compressed. When the anchor rod 5 is recovered, the push rod 606 moves upward and can push the fixed block 702 toward the axial direction of the anchor rod 5 through the compression spring 703, thereby resetting the expansion mechanism 6, so that the expansion mechanism 6 can be reused and is easy to operate, thereby improving the reliability and work efficiency of the device.

[0060] Furthermore, the anchor rod 5 is modularly configured, and the modules are detachably connected.

[0061] The modularized anchor rod 5 can reduce the volume and weight of a single piece, making it easier to transport and carry it to the construction site. The detachable design allows construction workers to adjust the total length and performance of the anchor rod 5 according to actual conditions to meet different engineering requirements.

[0062] Furthermore, the detachable connection is a snap-fit ​​connection, and the snap-fit ​​position is reinforced by bolts 11.

[0063] The method of reinforcing by means of the snap-fit ​​connection and the bolts 11 can take into account both the convenience of construction and the reliability of connection, while reducing the difficulty of maintenance and improving the performance and service life of the entire system.

[0064] Furthermore, a plurality of protrusions 12 are arranged on the outer wall of the movable block 604, and the protrusions 12 are arranged in a trapezoidal shape.

[0065] The trapezoidal protrusions 12 can more effectively push away the surrounding soil or rock during expansion, so that the anchor rod 5 can reach the required expansion degree under lower pressure, thereby improving the efficiency of the entire expansion process.

[0066] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A static load test device for pile foundation detection, characterized in that ,include: A support frame (1), the support frame (1) being erected on the ground and having at least two groups uniformly distributed in the circumferential direction based on the center of the pile foundation (10); A main beam (2), wherein the main beam (2) is erected above the support frame (1), and a jack (3) is provided between the main beam (2) and the pile foundation (10); A pull rod (4), wherein the pull rod (4) is arranged between the support frame (1) and the main beam (2), and is symmetrically arranged; An anchor rod (5), the anchor rod (5) is inserted into the ground, and the anchor rod (5) is connected to the support frame (1); An expansion mechanism (6), wherein the expansion mechanism (6) is embedded in the outer wall of the anchor rod (5), and a plurality of groups of the expansion mechanism (6) are evenly distributed in the circumferential direction based on the axis of the anchor rod (5); a reset structure (7), the reset structure (7) being arranged between the expansion mechanism (6) and the anchor rod (5) and being used for driving the expansion mechanism (6) to retract the anchor rod (5); Wherein, the expansion mechanism (6) is movably arranged.

2. A static load test device for pile foundation detection according to claim 1, characterized in that: The expansion mechanism (6) comprises: A cavity (601), wherein the cavity (601) is arranged along the axis of the anchor rod (5), and a push rod (606) is slidably arranged in the cavity (601); A receiving groove (602), the receiving groove (602) is evenly distributed on the outer wall of the anchor rod (5) in the circumferential direction, and a movable block (604) is slidably arranged in the receiving groove (602); A connecting groove (603), wherein the connecting groove (603) is arranged between the cavity (601) and the containing groove (602), and a push block (605) is slidably arranged in the connecting groove (603), and the push block (605) is fixedly connected to the movable block (604); Wherein, the top surface of the push block (605) is provided with an inclined surface, and the inclined surface contacts the bottom surface of the push rod (606).

3. A static load test device for pile foundation detection according to claim 2, characterized in that: The bottom surface of the push rod (606) is conical.

4. A static load test device for pile foundation detection according to claim 1, characterized in that: The reset structure (7) comprises: A sliding groove (701), wherein the sliding groove (701) is symmetrically arranged on the upper and lower surfaces of the connecting groove (603); A fixed block (702), wherein the fixed block (702) is symmetrically arranged on the push block (605), and the fixed block (702) is slidably connected to the sliding groove (701); Wherein, a compression spring (703) is arranged between the fixing block (702) and the sliding groove (701).

5. A static load test device for pile foundation detection according to claim 1, characterized in that: The anchor rod (5) is modularly arranged, and the modules are detachably connected.

6. A static load test device for pile foundation detection according to claim 5, characterized in that: The detachable connection is a snap-fit ​​connection, and the snap-fit ​​position is reinforced by bolts (11).

7. A static load test device for pile foundation detection according to claim 2, characterized in that: A plurality of protrusions (12) are arranged on the outer wall of the movable block (604), and the protrusions (12) are arranged in a trapezoidal shape.

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