Device for static load test of pile foundation
By setting gears and connectors in the pile foundation static load test device, synchronous movement and precise adjustment of the plate body are achieved, the problem of center of gravity offset of counterweight concrete is solved, and the placement efficiency and convenience are improved.
Patent Information
- Application Number
- CN202422471221.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The bearing plate size of counterweight concrete in the existing pile foundation static load test cannot be adjusted, resulting in risk of center of gravity offset and inconvenient use.
Gears and connectors are arranged on the lower surface of the support to realize synchronous movement of the first plate body and the second plate body, and scales are set on the connector to adjust the distance, and the center alignment of the support is ensured with a limiting ring to improve installation efficiency.
The symmetrical placement of counterweight concrete in the short side direction of the support is achieved, which improves the placement efficiency and the accuracy of distance adjustment, avoids the center of gravity offset, and improves the convenience of use of the device.
Smart Images
Figure CN223163941U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of equipment for pile foundation static load tests, and specifically relates to a device for pile foundation static load tests. Background Technique
[0002] The pile foundation static load test is a technology used in engineering to detect the bearing capacity of pile foundations. In determining the ultimate bearing capacity of a single pile, it is currently the most accurate and reliable test method. Whether a certain dynamic load test method is mature is judged based on the comparison error of the static load test results. Therefore, each design and treatment specification for foundation bases includes the single-pile static load test in the first place.
[0003] In the prior art, a jack is used for pile foundation static load tests. Usually, the jack is placed on the pile foundation, and the counterweight concrete is placed on the bearing plate above the jack. Currently, the concrete used for counterweight is usually in the shape of a long cuboid. When placed on the bearing plate, the position of the concrete needs to be adjusted multiple times to make the overall center of gravity of the counterweight concrete above the jack.
[0004] In the prior art, in order to avoid the center of gravity of the counterweight concrete from shifting, a bearing plate with the same width as the length of the concrete is usually selected. During the experiment, as long as the concrete is aligned with the edge of the bearing plate, the risk of center of gravity shift can be reduced. However, this method requires one-to-one production adaptation for different specifications of counterweight concrete, and at the same time, it will cause the area of the bearing plate to be too large, occupying a large amount of space during storage and transportation, and there are problems of inconvenient adjustment during use for the large-area bearing plate. Content of the Utility Model
[0005] This application provides a device for pile foundation static load tests, which is used to solve the technical problem that the size of the bearing plate for counterweight concrete in pile foundation static load tests cannot be adjusted.
[0006] A device for pile foundation static load tests provided by this application includes: a jack installed on the pile foundation column body and a support member arranged on the jack for bearing the counterweight concrete; the lower surface of the support member is symmetrically provided with a first gear and a second gear of the same size; a first connecting member and a second connecting member of the same size are provided in a meshing manner at the first gear, and both the first connecting member and the second connecting member can reciprocate in the width direction of the support member; a third connecting member and a fourth connecting member of the same size are provided in a meshing manner at the second gear, and both the third connecting member and the fourth connecting member can reciprocate in the width direction of the support member; two longer sides of the support member are respectively provided with a first plate body and a second plate body extending along the length direction of the support member, and both the first plate body and the second plate body extend vertically upward from the support member; the first plate body is connected to both the first connecting member and the fourth connecting member, and the second plate body is connected to both the second connecting member and the third connecting member.
[0007] Preferably, chain teeth extend on the surfaces of the first connecting member and the second connecting member close to the first gear, and the chain teeth on the first connecting member are of the same size as those on the second connecting member; chain teeth extend on the surfaces of the third connecting member and the fourth connecting member close to the second gear, and the chain teeth on the third connecting member are of the same size as those on the fourth connecting member.
[0008] By adopting the above technical solution, a first gear and a second gear are arranged on the lower surface of the support member, and the first plate body is connected through the first connecting member and the fourth connecting member, and the second plate body is connected through the second connecting member and the third connecting member, realizing the synchronous movement of the first plate body and the second plate body, ensuring the symmetric placement of the weight concrete in the short side direction of the support member, and improving the placement efficiency of the weight concrete.
[0009] Preferably, scales are provided on both the first connecting member and the fourth connecting member.
[0010] By adopting the above technical solution, scales are arranged on the first connecting member and the fourth connecting member, improving the accuracy of the distance between the first plate body and the second plate body and the adjustment efficiency of the distance between the first plate body and the second plate body.
[0011] Preferably, a limiting ring is arranged at the center of the lower surface of the support member, and the inner diameter of the inner ring of the limiting ring is the same as the diameter of the ejector rod of the jack.
[0012] Preferably, the limiting ring is connected to the support member in a detachable manner. A first groove is arranged at the center of the lower surface of the support member, and a first convex block adapted to be embedded in the first groove is arranged on the surface of the limiting ring close to the support member.
[0013] Preferably, the shape of the first groove is a cross shape, and four first convex blocks distributed in a cross shape are arranged on the limiting ring.
[0014] By adopting the above technical solution, a limiting ring with an inner diameter the same as that of the ejector rod is selected, the limiting ring is fixed on the lower surface of the support member, and the limiting ring is sleeved on the ejector rod so that the ejector rod is located at the center of the support member, improving the installation efficiency of the support member and avoiding the center of gravity deviation caused by the installation deviation of the support member.
[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages:
[0016] 1. A first gear and a second gear are arranged on the lower surface of the support member, and the first plate body is connected through the first connecting member and the fourth connecting member, and the second plate body is connected through the second connecting member and the third connecting member, realizing the synchronous movement of the first plate body and the second plate body, ensuring the symmetric placement of the weight concrete in the short side direction of the support member, and improving the placement efficiency of the weight concrete;
[0017] 2. Scales are provided on the first connecting piece and the fourth connecting piece, which improves the accuracy of the distance between the first plate body and the second plate body and enhances the efficiency of adjusting the distance between the first plate body and the second plate body.
[0018] 3. A limiting ring with an inner diameter equal to the diameter of the ejector rod is selected, fixed on the lower surface of the support piece, and sleeved on the ejector rod so that the ejector rod is located at the center of the support piece, which improves the installation efficiency of the support piece and avoids the center of gravity deviation caused by the installation deviation of the support piece. Brief Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0020] Figure 1 Isometric view of a device for pile foundation static load test provided by this application;
[0021] Figure 2 Isometric view of the first plate body and the second plate body of a device for pile foundation static load test provided by this application in a use state;
[0022] Figure 3 Exploded view of a device for pile foundation static load test provided by this application;
[0023] Figure 4 Side view of a device for pile foundation static load test provided by this application;
[0024] Figure 5 Is Figure 4 Cross-sectional view in the A-A direction in
[0025] Figure 6 Isometric view of the limiting ring of a device for pile foundation static load test provided by this application.
[0026] Explanation of the reference numerals: 1. Pile foundation column; 2. Support piece; 21. First gear; 22. Second gear; 23. First groove; 24. Protective shell; 31. First connecting piece; 32. Second connecting piece; 33. Third connecting piece; 34. Fourth connecting piece; 41. First plate body; 42. Second plate body; 5. Limiting ring; 51. First convex block; 6. Jack; 61. Ejector rod; 7. Base plate; 8. Scale. Detailed Embodiments
[0027] The present application provides a device for static load test of pile foundation, which is used to solve the technical problem that the size of the bearing plate of the counterweight concrete in the static load test of pile foundation in the prior art cannot be adjusted.
[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.
[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server including a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or devices.
[0030] Embodiment 1
[0031] As Figures 1 to 6 shown, an embodiment of the present application provides a device for static load test of pile foundation, including: a jack 6 installed on a pile foundation column 1 and a support member 2 provided on the jack 6 for carrying counterweight concrete; the lower surface of the support member 2 is symmetrically provided with a first gear 21 and a second gear 22 of the same size; a first connecting member 31 and a second connecting member 32 of the same size are provided in a meshing manner at the first gear 21, and both the first connecting member 31 and the second connecting member 32 can reciprocate in the width direction of the support member 2; a third connecting member 33 and a fourth connecting member 34 of the same size are provided in a meshing manner at the second gear 22, and both the third connecting member 33 and the fourth connecting member 34 can reciprocate in the width direction of the support member 2; the two longer sides of the support member 2 are respectively provided with a first plate body 41 and a second plate body 42 extending along the length direction of the support member 2, and both the first plate body 41 and the second plate body 42 extend vertically upward with respect to the support member 2; the first plate body 41 is connected to both the first connecting member 31 and the fourth connecting member 34, and the second plate body 42 is connected to both the second connecting member 32 and the third connecting member 33.
[0032] More preferably, in the embodiments provided in the present application, a backing plate 7 is provided on the pile foundation column 1 to be tested, and a jack 6 is provided on the backing plate 7. The jack 6 is a common hydraulic jack 6 in the prior art. A rectangular parallelepiped plate-shaped support member 2 is provided on the upper surface of the hydraulic jack 6. The upper surface of the support member 2 is used to carry the weight concrete, and the ejector rod 61 of the jack 6 abuts against the lower surface of the support member 2.
[0033] Two protective shells 24 are symmetrically provided on the lower surface of the support member 2. Two first gears 21 and second gears 22 with the same size and rotatable are respectively provided in the two protective shells 24. The first gear 21 and the second gear 22 are symmetrically provided on the lower surface of the support member 2, and the connection line between the first gear 21 and the second gear 22 is located on the longer symmetry axis of the support member 2. Through grooves penetrating along the short side direction of the support member 2 are provided on both of the two protective shells 24. The first connecting member 31 and the second connecting member 32 are connected to the first gear 21 in a meshing manner, and the third connecting member 33 and the fourth connecting member 34 are connected to the second gear 22 in a meshing manner. The first connecting member 31, the second connecting member 32, the third connecting member 33, and the fourth connecting member 34 have the same size and can reciprocate along the short side direction of the support member 2 by means of the first gear 21 or the second gear 22 in the through groove; first plate bodies 41 and second plate bodies 42 extending along the length direction of the support member 2 are respectively provided at the two long sides of the support member 2. The first plate bodies 41 and the second plate bodies 42 have the same size, and a part of each of them is located above the support member 2. Among them, the first plate body 41 is connected to the first connecting member 31 and the fourth connecting member 34, and the second plate body 42 is connected to the second connecting member 32 and the third connecting member 33. Under the action of the first gear 21 and the second gear 22, when the first plate body 41 moves away from the support member 2, at the same time, the second plate body 42 synchronously moves away from the support member 2 in the direction opposite to the moving direction of the first plate body 41, and the distances of the first plate body 41 and the second plate body 42 from the support member 2 are always the same.
[0034] During the use process, the first plate body 41 is pulled out in the direction away from the support member 2, and at the same time, the second plate body 42 synchronously moves away from the support member 2, so that the distance between the first plate body 41 and the second plate body 42 is equal to or slightly larger than the length of the weight concrete. Then, the weight concrete is sequentially placed on the upper surface of the support member 2, and the two short sides of the weight concrete abut against the first plate body 41 and the second plate body 42 to ensure that the overall center of gravity of the weight concrete does not shift.
[0035] In this embodiment, by providing a first gear 21 and a second gear 22 on the lower surface of the support member 2, and connecting the first plate body 41 through the first connecting member 31 and the fourth connecting member 34, and connecting the second plate body 42 through the second connecting member 32 and the third connecting member 33, the synchronous movement of the first plate body 41 and the second plate body 42 is achieved, ensuring the symmetric placement of the counterweight concrete in the short side direction of the support member 2 and improving the placement efficiency of the counterweight concrete.
[0036] Embodiment 2
[0037] Further, on the basis of the above embodiment, as Figure 3 shown, a scale 8 is provided on the side of the first connecting member 31 facing away from the first gear 21, and a scale 8 is also provided on the side of the fourth connecting member 34 facing away from the second gear 22; during use, the distance between the first plate body 41 and the second plate body 42 can be quickly adjusted through the scale 8.
[0038] In this embodiment, by providing scales 8 on the first connecting member 31 and the fourth connecting member 34, the accuracy of the distance between the first plate body 41 and the second plate body 42 is improved, and the efficiency of adjusting the distance between the first plate body 41 and the second plate body 42 is improved.
[0039] Embodiment 3
[0040] Further, on the basis of the above embodiment, as Figure 3 and Figure 6 shown, a limiting ring 5 with an inner diameter the same as that of the ejector rod 61 is provided on the lower surface of the support member 2, a "cross"-shaped first groove 23 is opened at the center of the lower surface of the support member 2, and four first protrusions 51 distributed in a "cross" shape are provided on the upper surface of the limiting ring 5. During use, select a limiting ring 5 with an inner diameter the same as that of the ejector rod 61, fix the limiting ring 5 on the lower surface of the support member 2, and put the limiting ring 5 on the ejector rod 61 so that the ejector rod 61 is located at the center of the support member 2, that is, the ejector rod 61 is located at the center of gravity of the whole counterweight concrete.
[0041] In this embodiment, by selecting a limiting ring 5 with an inner diameter the same as that of the ejector rod 61, fixing the limiting ring 5 on the lower surface of the support member 2, and putting the limiting ring 5 on the ejector rod 61 so that the ejector rod 61 is located at the center of the support member 2, the installation efficiency of the support member 2 is improved, and the center of gravity deviation caused by the installation deviation of the support member 2 is avoided.
[0042] It should be noted that the above sequence of embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. Also, the above specific embodiments of this specification have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.
[0043] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.
[0044] This specification and the drawings are only exemplary descriptions of the present application and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications.
Claims
1. A device for static load test of pile foundation, characterized in that: It includes a jack (6) installed on a pile foundation column (1) and a support (2) provided on the jack (6) for carrying counterweight concrete; the lower surface of the support (2) is symmetrically provided with rotatable first and second gears (21, 22) of the same size; the first gear (21) is meshed with first and second connectors (31, 32) of the same size, and both the first connector (31) and the second connector (32) can reciprocate in the width direction of the support (2); the second gear (22) is meshed with third and fourth connectors (33, 34) of the same size, and both the third connector (33) and the fourth connector (34) can reciprocate in the width direction of the support (2); two longer sides of the support (2) are respectively provided with a first plate body (41) and a second plate body (42) extending along the length direction of the support (2), and both the first plate body (41) and the second plate body (42) extend vertically upward from the support (2); the first plate body (41) is connected to both the first connector (31) and the fourth connector (34), and the second plate body (42) is connected to both the second connector (32) and the third connector (33).
2. The device for pile foundation static load test according to claim 1, characterized in that, Both the first connector (31) and the second connector (32) extend chain teeth on the side facing the first gear (21), and the chain teeth on the first connector (31) are of the same size as those on the second connector (32); both the third connector (33) and the fourth connector (34) extend chain teeth on the side facing the second gear (22), and the chain teeth on the third connector (33) are of the same size as those on the fourth connector (34).
3. The device for static load test of pile foundation according to claim 2, characterized in that, Both the first connector (31) and the fourth connector (34) are provided with scales (8).
4. A device for static load test of pile foundation according to claim 1, characterized in that, A limit ring (5) is provided at the center of the lower surface of the support (2), and the inner diameter of the inner ring of the limit ring (5) is the same as the diameter of the ejector rod (61) of the jack (6).
5. The device for static load test of pile foundation according to claim 4, characterized in that, The limit ring (5) is detachably connected to the support (2). A first groove (23) is provided at the center of the lower surface of the support (2), and a first convex block (51) adapted to be embedded in the first groove (23) is provided on the side of the limit ring (5) close to the support (2).
6. The device for pile foundation static load test according to claim 5, characterized in that, The shape of the first groove (23) is a "cross" shape, and the limit ring (5) is provided with four first convex blocks (51) distributed in a "cross" shape.