C-shaped pile transverse loading torsion-free hoop
By using an eccentrically loaded clamp structure on C-shaped piles, the bending moment is eliminated, solving the problem of torsional instability of C-shaped piles under lateral loading, improving the accuracy and applicability of test data, and making it suitable for large-scale tests.
Patent Information
- Application Number
- CN202520202646.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-10
AI Technical Summary
During the lateral loading process of C-type piles, the bending center and shear center do not coincide, resulting in bending moment in the web, causing torsional instability of the steel pile foundation, affecting the accuracy and reliability of the test data. Furthermore, the traditional method of welding stiffeners is cumbersome and not suitable for large-scale tests.
An eccentrically loaded clamp structure is adopted, in which the C-shaped steel is surrounded by Z-shaped steel plates and box-shaped steel plates and fixed with bolts to form an eccentric loading method, which eliminates bending moment, avoids torsion, and does not change the original structure of the steel.
It achieves the avoidance of torsion during loading, improves the integrity and accuracy of test data, is suitable for large-scale testing, and is easy to process and reusable.
Smart Images
Figure CN223937223U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel pile foundation construction technology, and in particular to a clamp for C-shaped piles with no torsion under lateral loading. Background Technology
[0002] For onshore photovoltaic projects, driven steel piles are widely used due to their advantages such as high strength, good economy, minimal soil displacement, and fast construction speed. Driven steel piles are widely applicable to fine-grained soils such as sandy soil and cohesive soil, and the main cross-sectional forms are H-shaped steel and C-shaped steel.
[0003] Before actual construction, it is often necessary to conduct compression, pull-out, and horizontal resistance tests on the steel pile foundation to obtain various mechanical parameters. These parameters are then input into modeling and analysis software for steel pile foundation design. To verify the accuracy of the modeling and analysis, the test loads and test conditions (load point height, pile embedment depth, pile cross-section, pile thickness, etc.) are often substituted into the model.
[0004] However, in actual transverse loading tests, foundations often use irregularly shaped steel sections, among which C-shaped steel piles have good economic advantages. If center loading is applied to C-shaped piles, since the bending center and shear center of the C-shaped pile do not coincide, a bending moment will be formed between the shear stress generated in the web and the applied load during the actual loading process, which will lead to torsional instability of the steel pile foundation, thus making it impossible to obtain complete failure load test data.
[0005] Currently, the main anti-torsional measures for structural steel are to weld stiffening ribs inside the steel section to enhance its stability. However, this method damages the original structure of the steel section, reducing the reliability of the obtained test parameters, and the processing is cumbersome, making it unsuitable for large-scale testing scenarios. Utility Model Content
[0006] To address the problems existing in the background technology, this utility model provides a C-shaped pile lateral loading non-torsion clamp, which adopts an eccentric loading method to completely eliminate the bending moment formed between the lateral loading force and the web of the C-shaped steel, avoid the torsional instability of the steel pile foundation during loading, and does not change the original structure of the steel section, thereby enhancing the accuracy of test data. It can also be reused and is suitable for large-scale test scenarios.
[0007] This utility model is achieved through the following technical solution.
[0008] A C-shaped pile lateral loading non-torsion clamp includes a C-shaped steel, a Z-shaped steel plate and a box-shaped steel plate. The Z-shaped steel plate and the box-shaped steel plate surround the C-shaped steel and are fixed with bolts. The box-shaped steel plate is attached to the web of the C-shaped steel. Loading holes are provided at the connection between the Z-shaped steel plate and the box-shaped steel plate.
[0009] Furthermore, bolt holes are provided at the connection points of the Z-shaped steel plate and the box-shaped steel plate, and the Z-shaped steel plate and the box-shaped steel plate are fixed together by the installation bolts and the C-shaped steel is clamped.
[0010] Furthermore, triangular steel plates are welded to the upper and lower sides and the left and right sides of the corners of the zigzag steel plate, and the size of the triangular steel plate on the side with the loading hole is smaller than the size of the triangular steel plate on the other side.
[0011] Furthermore, the width of the zigzag steel plate is greater than the width of the C-shaped steel it surrounds.
[0012] The beneficial effects of this utility model are:
[0013] 1. The eccentric loading method is adopted to counteract the bending moment generated by the traditional center loading method, avoid the torsion of the steel pile foundation, and improve the completeness and reliability of the test data;
[0014] 2. This utility model does not change the original structure of the steel profile, thus enhancing the accuracy of the test data;
[0015] 3. This utility model is easy to process, and the loading position can be adjusted by adjusting the position of the opening in the steel plate, making it suitable for C-shaped steel with different cross-sectional dimensions;
[0016] 4. This utility model is reusable and suitable for large-scale testing scenarios. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of the clamp of this utility model from one perspective;
[0018] Figure 2 This is a structural schematic diagram of the clamp of this utility model from another perspective;
[0019] Figure 3 This is a schematic diagram of the clamp loading.
[0020] In the diagram: 1. C-shaped steel, 11. Web plate, 2. Triangular steel plate, 3. Z-shaped steel plate, 4. Box-shaped steel plate, 5. Bolt hole, 6. Loading hole, 7. Clamp, 8. Chain, 9. Winch, 10. Force gauge. Detailed Implementation
[0021] The following description further explains the structures involved in this utility model and the technical terms used therein. These descriptions are merely illustrative of how this utility model is implemented and do not constitute any limitation on this utility model.
[0022] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, unless otherwise explicitly specified and limited, terms such as "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] like Figure 1 and Figure 2 As shown, a C-shaped pile lateral loading non-torsion clamp includes a C-shaped steel 1, a Z-shaped steel plate 3 and a box-shaped steel plate 4. The Z-shaped steel plate 3 and the box-shaped steel plate 4 surround the C-shaped steel 1 and are fixed to the C-shaped steel 1 with bolts. The box-shaped steel plate 4 is attached to the web 11 of the C-shaped steel 1. Loading holes 6 are provided at the connection between the Z-shaped steel plate 3 and the box-shaped steel plate 4.
[0025] As an optional embodiment, the opening position of the loading hole 6 needs to be determined by theoretical calculation, and the opening diameter needs to be determined according to the on-site loading device.
[0026] As an optional embodiment, bolt holes 5 are provided at the connection points of the Z-shaped steel plate 3 and the box-shaped steel plate 4, so that the Z-shaped steel plate 3 and the box-shaped steel plate 4 are fixed together by mounting bolts and firmly clamp the C-shaped steel 1. Specifically, as shown... Figure 1 As shown, there is a bolt hole 5 on the left side of the connection between the Z-shaped steel plate 3 and the box-shaped steel plate 4, a loading hole 6 on the outside, and two bolt holes 5 on the right side.
[0027] As an optional embodiment, triangular steel plates 2 are welded to the top and bottom, and left and right sides of the Z-shaped steel plate 3 to enhance the stability of the clamp 7. Specifically, as shown... Figure 2 As shown, the size of the triangular steel plate 2 on the side with the loading hole 6 is smaller than that on the other side, so as to reserve space for the installation of the hook.
[0028] As an optional embodiment, such as Figure 1As shown, the width of the Z-shaped steel plate 3 should be slightly larger than the width of the C-shaped steel 1 it surrounds, so as to achieve the fixing effect after the bolts are tightened.
[0029] The loading test is as follows:
[0030] Step 1: Pile Foundation Installation
[0031] According to the drawings, the axis was laid out, and the rammer was moved into position. The rammer was operated according to the operation manual. First, the rammer was used to lightly tap the C-shaped steel 1 with the low hammer, and then the formal hammering was carried out to drive the C-shaped steel 1 into the soil to the predetermined burial depth.
[0032] Step Two: Making the Hoop
[0033] 1. Based on the calculations, drill holes in the Z-shaped steel plate 3 and the box-shaped steel plate 4 to reserve the loading hole 6 and bolt hole 5.
[0034] 2. Weld the four triangular steel plates 2 to the Z-shaped steel plate 3 respectively;
[0035] 3. Insert the Z-shaped steel plate 3 into the C-shaped steel 1, and connect the Z-shaped steel plate 3 to the box-shaped steel plate 4 with bolts and tighten the bolts.
[0036] Step 3: Specimen Loading
[0037] like Figure 3 As shown, the loading device is connected to the clamp 7 via the loading hole 5 and the hook and bolt. The loading device connects the hook to the winch 9 via the chain 8 and the force gauge 10.
[0038] Step 4: Dismantling the device
[0039] Remove the hook and bolts of the loading device from the clamp 7, then remove the bolts of the Z-shaped steel plate 3 and the box-shaped steel plate 4, remove the clamp 7 from the C-shaped steel 1, and finally pull the C-shaped steel 1 out of the soil.
[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A clamp for C-shaped piles under lateral loading without torsion, comprising C-shaped steel, characterized in that: It also includes Z-shaped steel plates and box-shaped steel plates, wherein the Z-shaped steel plates and box-shaped steel plates surround the C-shaped steel and are fixed with bolts, the box-shaped steel plates are attached to the web of the C-shaped steel, and loading holes are provided at the connection between the Z-shaped steel plates and the box-shaped steel plates.
2. The C-type pile lateral loading non-torsion clamp according to claim 1, characterized in that: Bolt holes are provided at the connection points of the Z-shaped steel plate and the box-shaped steel plate. The Z-shaped steel plate and the box-shaped steel plate are fixed together by the installation bolts and the C-shaped steel is clamped.
3. The C-type pile lateral loading non-torsion clamp according to claim 1, characterized in that: The zigzag steel plate has triangular steel plates welded to its upper and lower sides and left and right sides. The size of the triangular steel plate on the side with the loading hole is smaller than the size of the triangular steel plate on the other side.
4. The C-type pile lateral loading non-torsion clamp according to claim 1, characterized in that: The width of the zigzag steel plate is greater than the width of the C-shaped steel plate it surrounds.