Following long pile casing splicing structure for karst pile foundation

Abstract

The utility model provides a follow-up long pile casing splicing structure for a karst pile foundation, which comprises an upper pile casing, a lower pile casing and a connecting plate fixedly connected with the upper pile casing and the lower pile casing respectively, and connecting structures are arranged between the upper pile casing and the connecting plate and between the lower pile casing and the connecting plate. The connecting structure comprises a plurality of inserting holes obliquely formed in the upper pile casing or the lower pile casing, penetrating holes obliquely formed in the connecting plate and matched with the inserting holes, plug pins matched with the inserting holes and the penetrating holes respectively, and a locking structure used for locking the plug pins. The structure is simple, and fasteners are not prone to deformation.

Description

Technical Field

[0001] This application relates to the field of construction, and more specifically, to a follow-up long casing splicing structure for karst pile foundations. Background Technology

[0002] With the continuous development of my country's railway industry, high-speed railways have gradually replaced ordinary railways and highways as the main means of daily transportation. In plain areas, high-speed railways mainly rely on bridges, and pile foundations are widely used for bridges.

[0003] Due to the complexity of geological conditions, different regions will encounter different geological conditions. The biggest factor affecting pile foundations is karst caves. For shallow karst caves, the conventional method is to backfill with rubble and loess before drilling. When the karst caves are deeper than the ground line or multiple caves are distributed in layers, backfilling is no longer sufficient. Therefore, casing is required to prevent mud slurry or concrete from flowing away along the cave cavity and causing unnecessary losses.

[0004] The steel casing is typically 3-5m long. When the steel casing needs to be extended, bevel welding is usually used. However, due to the limited lifting height of the crane, welding must be performed at the opening of the hole when the extended steel casing is lowered into the pile foundation hole. This results in low welding efficiency and poor welding quality, and the verticality of the extended steel casing cannot be well guaranteed, causing many difficulties in lowering the extended steel casing.

[0005] Existing casing splicing structures, such as the connection device for steel casings of bridge cast-in-place piles disclosed in CN217399415U, use arc-shaped connecting plates and bolts to splice the casings. However, this solution has defects. Since the bolts are perpendicular to the casing, the weight of the casing is applied laterally to the bolts, making them prone to bending and deformation. When the number of bolts is increased, the process becomes complicated and the operation becomes difficult. Therefore, it is necessary to improve the splicing structure to overcome the above defects. Utility Model Content

[0006] The main purpose of this application is to provide a follow-up long casing splicing structure for karst pile foundations, which has a simple structure and fasteners that are not easily deformed.

[0007] To achieve the above objectives, in a first aspect, this application provides a follow-up long casing splicing structure for karst pile foundations, including an upper casing, a lower casing, and a connecting plate fixedly connected to the upper casing and the lower casing respectively. A connecting structure is provided between the upper casing and the lower casing and the connecting plate. The connecting structure includes a plurality of insertion holes inclinedly opened on the upper casing or the lower casing, a through hole inclinedly opened on the connecting plate and cooperating with the insertion holes, a pin cooperating with the insertion holes and the through hole respectively, and a locking structure for locking the plurality of pins.

[0008] Optionally, the locking structure includes a locking notch formed on the pin and a clamp fixedly sleeved on the outside of the connecting plate, the clamp cooperating with the locking notch.

[0009] Optionally, the two ends of the clamp are fixedly connected by fasteners.

[0010] Optionally, the connecting plate is semi-circular.

[0011] Optionally, the clamp is annular, and the locking notch is an arc notch.

[0012] Optionally, the outer surface of the connecting plate has a limiting groove that mates with the clamp.

[0013] This utility model provides a follow-up long casing splicing structure for karst pile foundations. Compared with the prior art, its advantages are as follows: the original hole perpendicular to the casing is set as an inclined hole. With the help of pins, there is no need to use bolts or other fasteners during operation. After the pins are in place, all pins are directly fixed to the connecting plate by clamps. Locking is achieved by using a locking structure. Since the gravity is not horizontal and perpendicular to the pins, it is not easy to bend, and the operation is simple and convenient. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 yes Figure 2 Enlarged view of point A.

[0018] The components include: 1. upper casing; 2. lower casing; 3. pin; 4. insertion hole; 5. through hole; 6. clamp; 7. fastener; 8. locking notch; 9. limiting groove; 10. connecting plate. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] In addition, the term "multiple" should mean two or more.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1-3As shown, a follow-up long casing splicing structure for karst pile foundation includes an upper casing 1, a lower casing 2, and a connecting plate 10 fixedly connected to the upper casing 1 and the lower casing 2 respectively. A connecting structure is provided between the upper casing 1 and the lower casing 2 and the connecting plate 10. The connecting structure includes several insertion holes 4 obliquely opened on the upper casing 1 or the lower casing 2, through holes 5 obliquely opened on the connecting plate 10 and cooperating with the insertion holes 4, pins 3 cooperating with the insertion holes 4 and the through holes 5 respectively, and a locking structure for locking the pins 3. Specifically, the locking structure includes a locking notch 8 opened on the pins 3 and a clamp 6 fixedly sleeved on the outside of the connecting plate 10, the clamp 6 cooperating with the locking notch 8.

[0026] When the upper casing 1 and the lower casing 2 need to be spliced, they are first fixedly connected to the connecting plate 10 respectively. For example, when connecting the upper casing 1 and the connecting plate 10, the connecting plate 10 is first placed on the outside of the upper casing 1 so that the through hole 5 is aligned with the insertion hole 4. Then, the pin 3 is inserted at an angle. It should be noted that the locking notch on each pin 3 needs to be in the same direction. Then, all the pins 3 are locked on the connecting plate 10 by clamp 6. The locking method is to insert the clamp 6 into the locking notch 8 and then lock the two ends of the clamp 6 by fastener 7, that is, all the pins 3 are locked and cannot be pulled out from the insertion hole 4. When disassembling, the pins 3 can be pulled out directly after the clamp 6 is removed. There is no need for the threaded connection in the prior art. Disassembly and installation are more convenient. Moreover, since the pin 3 is inserted at an angle, the direction of gravity of the upper casing 1 is not directly the same as the radial direction of the pin 3. Therefore, the pin 3 is not easy to deform.

[0027] For easy connection, the two ends of the clamp 6 are fixedly connected by fasteners 7.

[0028] In order to ensure a tight fit between the connecting plate and the upper casing 1 or the lower casing 2, the connecting plate 10 is semi-circular.

[0029] To ensure a more stable locking of the clamp 6, the clamp 6 is annular, the locking notch 8 is an arc notch, and the outer surface of the connecting plate 10 has a limiting groove 9 that cooperates with the clamp 6.

[0030] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A follow-up long casing splicing structure for karst pile foundations, characterized in that, The device includes an upper protective sleeve, a lower protective sleeve, and a connecting plate that is fixedly connected to the upper and lower protective sleeves respectively. A connecting structure is provided between the upper and lower protective sleeves and the connecting plate. The connecting structure includes a plurality of insertion holes inclinedly opened on the upper or lower protective sleeve, a through hole inclinedly opened on the connecting plate and cooperating with the insertion holes, a pin that cooperates with the insertion holes and the through hole respectively, and a locking structure for locking the plurality of pins.

2. The follow-up long casing splicing structure for karst pile foundation as described in claim 1, characterized in that: The locking structure includes a locking notch formed on the pin and a clamp fixedly sleeved on the outside of the connecting plate, the clamp cooperating with the locking notch.

3. The follow-up long casing splicing structure for karst pile foundations as described in claim 2, characterized in that: The two ends of the clamp are fixedly connected by fasteners.

4. The follow-up long casing splicing structure for karst pile foundation as described in claim 1, characterized in that: The connecting plate is a semi-circular arc.

5. The follow-up long casing splicing structure for karst pile foundation as described in claim 2, characterized in that: The clamp is circular, and the locking notch is an arc notch.

6. The follow-up long casing splicing structure for karst pile foundation as described in claim 2, characterized in that: The outer surface of the connecting plate has a limiting groove that mates with the clamp.

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