Recyclable pile casing for cast-in-situ bored pile and underwater cast-in-situ bored pile

Abstract

The recoverable pile casing comprises a thin-wall pile casing body, the thin-wall pile casing body is used for being inserted into an underwater pile foundation hole, the end, close to an opening of the pile foundation hole, of the thin-wall pile casing body is sleeved with a temporary pile casing body, and the temporary pile casing body is arranged on the outer side of the thin-wall pile casing body in a sleeving mode; the temporary pile casing and the thin-wall pile casing are connected in an inserted mode through an inserting piece in the radial direction of the thin-wall pile casing. And in the axial direction of the thin-wall pile casing, the length of the temporary pile casing is smaller than that of the thin-wall pile casing. The thin-wall pile casing is inserted into the pile foundation hole, and the temporary pile casing is mounted at one end, close to the hole opening of the pile foundation hole, of the thin-wall pile casing, so that the temporary pile casing supports the hole opening in the pile forming process, can be detached after pile forming and is used at the next construction pile position, and the problem that in the related technology, in the construction process of the underwater cast-in-situ bored pile, the construction efficiency is high is solved. And in order to guarantee the pile forming quality, temporary pile casings cannot be pulled out, a large number of temporary pile casings are left in pile foundation holes, steel waste is caused, and the cost is increased.

Description

Technical Field

[0001] This application relates to the field of building construction technology, specifically to a recyclable casing for bored cast-in-place piles and an underwater bored cast-in-place pile. Background Technology

[0002] Currently, the construction of the bridge substructure adopts bored pile construction. Before the construction of bored piles, temporary casings need to be driven to ensure the quality of the hole and prevent the hole from collapsing.

[0003] In related technologies, during the construction of underwater bored piles, temporary casings cannot be removed to ensure the quality of the pile, resulting in a large number of temporary casings remaining in the pile hole, causing waste of steel and increased costs.

[0004] Therefore, it is necessary to design a new recyclable casing for bored piles to overcome the above problems. Utility Model Content

[0005] This application provides a recyclable casing for bored cast-in-place piles and an underwater bored cast-in-place pile, which can solve the technical problem in related technologies where temporary casings cannot be removed during the construction of underwater bored cast-in-place piles to ensure pile quality, resulting in a large number of temporary casings remaining in the pile hole, causing waste of steel and increased costs.

[0006] In a first aspect, embodiments of this application provide a recyclable casing for bored piles, comprising a thin-walled casing for insertion into an underwater pile hole. A temporary casing is fitted onto one end of the thin-walled casing near the hole opening, and the temporary casing is fitted onto the outside of the thin-walled casing. The temporary casing and the thin-walled casing are connected by a connector along the radial direction of the thin-walled casing. Along the axial direction of the thin-walled casing, the length of the temporary casing is less than the length of the thin-walled casing.

[0007] In conjunction with the first aspect, in one embodiment, the connector is configured as a pin, the temporary sleeve is provided with a plurality of first mounting holes, the thin-walled sleeve is provided with a plurality of second mounting holes, and the temporary sleeve and the thin-walled sleeve are connected by the pin passing through the first mounting holes and the second mounting holes.

[0008] In conjunction with the first aspect, in one embodiment, the thickness of the thin-walled casing is less than the thickness of the temporary casing.

[0009] In conjunction with the first aspect, in one embodiment, the ratio of the thickness of the thin-walled casing to the thickness of the temporary casing is set to 0.18 to 0.22.

[0010] In conjunction with the first aspect, in one embodiment, the top surface of the temporary casing is higher than the top surface of the thin-walled casing.

[0011] In conjunction with the first aspect, in one embodiment, the length of the overlapping portion of the thin-walled casing and the temporary casing along the axial direction of the thin-walled casing is set to be 50% to 60% of the total length of the thin-walled casing.

[0012] In conjunction with the first aspect, in one embodiment, the thin-walled casing includes multiple first casing sections, which are joined end-to-end along the axial direction of the first casing by threads. The temporary casing is sleeved outside the first casing, and at least one first casing section is inserted into the temporary casing via the connector.

[0013] In conjunction with the first aspect, in one embodiment, the thin-walled casing is made of steel or PVC polymer material.

[0014] Secondly, embodiments of this application provide an underwater drilled cast-in-place pile, comprising: a thin-walled casing, a reinforcing cage, and concrete. The thin-walled casing is inserted into the underwater pile foundation hole. A temporary casing is fitted onto one end of the thin-walled casing near the hole opening, and the temporary casing is fitted onto the outside of the thin-walled casing. The temporary casing and the thin-walled casing are connected by a connector along the radial direction of the thin-walled casing. Along the axial direction of the thin-walled casing, the length of the temporary casing is less than the length of the thin-walled casing. The reinforcing cage is inserted into the thin-walled casing. The concrete fills the thin-walled casing.

[0015] In conjunction with the second aspect, in one embodiment, the reinforcing cage is connected to the thin-walled casing via a connecting device.

[0016] The beneficial effects of the technical solutions provided in this application include:

[0017] By inserting thin-walled casings into the pile foundation hole and installing temporary casings at the end of the thin-walled casings near the pile foundation hole opening, the temporary casings support the hole opening during the pile formation process and can be removed after pile formation and reused for the next pile location. This solves the technical problem in related technologies where, during the construction of underwater drilled cast-in-place piles, temporary casings cannot be removed to ensure pile quality, resulting in a large number of temporary casings remaining in the pile foundation hole, causing steel waste and increased costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1A cross-sectional view of a recyclable casing for a bored pile provided in an embodiment of this application;

[0020] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0021] In the diagram: 1. Thin-walled casing; 2. Temporary casing; 3. Connector; 4. Reinforcing cage; 5. Concrete; 6. Connecting device. Detailed Implementation

[0022] 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 are within the scope of protection of the present application.

[0023] This application provides a recyclable casing for bored cast-in-place piles and an underwater bored cast-in-place pile, which can solve the technical problem that in the construction process of underwater bored cast-in-place piles, temporary casings cannot be removed in order to ensure the quality of the pile, resulting in a large number of temporary casings remaining in the pile hole, causing waste of steel and increased costs.

[0024] See Figure 1 and Figure 2 As shown in the figure, this application provides a recyclable casing for bored piles, which includes a thin-walled casing 1. The thin-walled casing 1 is used to be inserted into the underwater pile foundation hole. A temporary casing 2 is sleeved on one end of the thin-walled casing 1 near the opening of the pile foundation hole, and the temporary casing 2 is sleeved on the outside of the thin-walled casing 1. The temporary casing 2 and the thin-walled casing 1 are connected by a connector 3 along the radial direction of the thin-walled casing 1. Along the axial direction of the thin-walled casing 1, the length of the temporary casing 2 is less than the length of the thin-walled casing 1.

[0025] In this embodiment, the diameter of the thin-walled casing 1 is smaller than that of the temporary casing 2, providing a precise reference for positioning the borehole opening. The temporary casing 2 has sufficient strength to support the borehole opening during pile formation. The temporary casing 2 and the thin-walled casing 1 are connected by the connector 3, allowing the temporary casing 2 to be recycled and avoiding waste of steel. The thin-walled casing 1 can effectively ensure the construction quality of the bored pile, and the temporary casing 2 is reusable, safe, and reliable.

[0026] This embodiment solves the technical problem in related technologies where, during the construction of underwater drilled cast-in-place piles, the temporary casing 2 cannot be removed to ensure pile quality, resulting in a large number of temporary casings 2 remaining in the pile hole, causing waste of steel and increased costs. This is achieved by inserting the thin-walled casing 1 into the pile hole and installing the temporary casing 2 at one end of the thin-walled casing 1 near the pile hole opening. The temporary casing 2 supports the hole opening during the pile formation process and can be removed after pile formation and reused for the next pile location.

[0027] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the connector 3 is configured as a pin, the temporary sleeve 2 is provided with a plurality of first mounting holes, the thin-walled sleeve 1 is provided with a plurality of second mounting holes, and the temporary sleeve 2 and the thin-walled sleeve 1 are connected by the pin passing through the first mounting holes and the second mounting holes.

[0028] In this embodiment, the connector 3 can be configured as the pin, and when the pin passes through the first mounting hole and the second mounting hole, the temporary protective sleeve 2 is inserted into the thin-walled protective sleeve 1. In other embodiments, the connector 3 can be configured as a screw, bolt, or other accessory.

[0029] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the thickness of the thin-walled casing 1 is less than the thickness of the temporary casing 2.

[0030] In this embodiment, the thickness of the temporary protective sleeve 2 can be set to 12-26 mm, preferably 20 mm, and the thickness of the thin-walled protective sleeve 1 can be set to 2-6 mm, preferably 4 mm, to ensure that the strength of the temporary protective sleeve 2 is greater than that of the thin-walled protective sleeve 1.

[0031] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the ratio of the thickness of the thin-walled casing 1 to the thickness of the temporary casing 2 is set to 0.18 to 0.22.

[0032] In this embodiment, the thickness of the temporary protective sleeve 2 can be set to 12-26 mm, preferably 20 mm, and the thickness of the thin-walled protective sleeve 1 can be set to 2-6 mm, preferably 4 mm, so that the ratio of the thickness of the thin-walled protective sleeve 1 to the thickness of the temporary protective sleeve 2 is set to 0.18-0.22, ensuring a reasonable amount of the temporary protective sleeve 2.

[0033] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the top surface of the temporary casing 2 is higher than the top surface of the thin-walled casing 1.

[0034] In this embodiment, the top surface of the temporary protective casing 2 is set higher than the top surface of the thin-walled protective casing 1 to facilitate timely removal of the temporary protective casing 2. In other embodiments, the top surface of the temporary protective casing 2 is set to be at the same height as the top surface of the thin-walled protective casing 1.

[0035] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the length of the overlapping portion of the thin-walled sleeve 1 and the temporary sleeve 2 along the axial direction of the thin-walled sleeve 1 is set to 50% to 60% of the total length of the thin-walled sleeve 1.

[0036] In this embodiment, the length of the overlapping portion of the thin-walled casing 1 and the temporary casing 2 can be set to 4-8m, and the length of the thin-walled casing 1 can be set to 8-12m, so that the length of the overlapping portion of the thin-walled casing 1 and the temporary casing 2 accounts for 50%-60% of the total length of the thin-walled casing 1, and the length of the recyclable casing of the bored pile can be appropriately shortened by 40%-50%.

[0037] Further, see Figure 1 As shown, in some embodiments, the thin-walled sleeve 1 includes multiple first sleeve sections, which are joined end-to-end along the axial direction of the first sleeve by threads. The temporary sleeve 2 is sleeved outside the first sleeve, and at least one first sleeve section is inserted into the temporary sleeve 2 through the connector 3.

[0038] In this embodiment, multiple sections of the first casing are joined end-to-end along the axial direction of the first casing to form a single thin-walled casing 1. The thin-walled casing 1 protects the underwater drilled pile during its formation, ensuring the construction quality of the underwater drilled pile. In other embodiments, the thin-walled casing 1 can be made from standard support components and assembled according to geological conditions.

[0039] Further, see Figure 1 As shown, in some embodiments, the thin-walled sleeve 1 is made of steel or PVC polymer material.

[0040] In this embodiment, the thin-walled casing 1 can be made of steel, PVC polymer, or other alternative materials. The thin-walled casing 1 protects the underwater drilled pile during its formation. The strength of the thin-walled casing 1 is relatively small compared to the strength of the temporary casing 2. After drilling, the thin-walled casing 1 is lowered without the need for driving it in.

[0041] See Figure 1 As shown in the figure, this application provides an underwater drilled cast-in-place pile, which includes: a thin-walled casing 1, a reinforcing cage 4, and concrete 5. The thin-walled casing 1 is inserted into the underwater pile foundation hole. A temporary casing 2 is fitted onto one end of the thin-walled casing 1 near the opening of the pile foundation hole, and the temporary casing 2 is fitted onto the outside of the thin-walled casing 1. The temporary casing 2 and the thin-walled casing 1 are connected by a connector 3 along the radial direction of the thin-walled casing 1. Along the axial direction of the thin-walled casing 1, the length of the temporary casing 2 is less than the length of the thin-walled casing 1. The reinforcing cage 4 is inserted into the thin-walled casing 1. The concrete 5 fills the thin-walled casing 1.

[0042] In this embodiment, the diameter of the thin-walled casing 1 is smaller than the diameter of the temporary casing 2, providing a precise reference for positioning the pile hole opening. The temporary casing 2 has sufficient strength to support the hole opening during pile formation. The temporary casing 2 and the thin-walled casing 1 are connected by the connector 3, allowing the temporary casing 2 to be recycled and avoiding steel waste. The thin-walled casing 1 effectively ensures the construction quality of the bored pile. The temporary casing 2 is reusable, safe, and reliable. The thin-walled casing 1 supports the concrete 5 during underwater bored pile construction, ensuring that the concrete 5 can solidify during underwater pouring. The temporary casing 2 can be removed immediately after the concrete 5 is poured, without waiting for the concrete 5 to solidify. The use of the temporary casing 2 does not occupy construction time, greatly saving construction time.

[0043] Further, see Figure 1 As shown, in some embodiments, the reinforcing cage 4 is connected to the thin-walled casing 1 via a connecting device 6.

[0044] In this embodiment, the connecting device 6 can be set as a pin or other lifting device to ensure that the thin-walled casing 1 is effectively connected to the reinforcing cage 4 when the temporary casing 2 is removed, so as to prevent the thin-walled casing 1 from floating.

[0045] In the construction of underwater bored piles, the construction site is first leveled and a drilling platform is erected. The temporary casing 2 is then driven into the designed pile location. The temporary casing 2 is then measured and inspected. Drilling is carried out only if the temporary casing 2 meets the accuracy requirements of the pile location. After drilling is completed, a hole formation test is performed. Once the hole formation test is passed, a thin-walled casing 1 is installed inside the temporary casing 2. The thin-walled casing 1 is connected to the temporary casing 2 via a pin. The reinforcing cage 4 is then placed inside the thin-walled casing 1, and concrete 5 is poured. After the concrete 5 is poured, the pin is removed. Finally, the temporary casing 2 is removed, and its surface slurry is cleaned for use in the next pile location construction.

[0046] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A recyclable casing for bored piles, characterized in that, It includes: Thin-walled casing (1), the thin-walled casing (1) is used to be inserted into the underwater pile foundation hole, a temporary casing (2) is sleeved on one end of the thin-walled casing (1) near the opening of the pile foundation hole, and the temporary casing (2) is sleeved on the outside of the thin-walled casing (1), and the temporary casing (2) and the thin-walled casing (1) are connected by a connector (3) along the radial direction of the thin-walled casing (1); Along the axial direction of the thin-walled casing (1), the length of the temporary casing (2) is less than the length of the thin-walled casing (1).

2. The recyclable casing for bored piles as described in claim 1, characterized in that, The connector (3) is configured as a pin, the temporary sleeve (2) is provided with a plurality of first mounting holes, the thin-walled sleeve (1) is provided with a plurality of second mounting holes, and the temporary sleeve (2) and the thin-walled sleeve (1) are connected by the pin passing through the first mounting holes and the second mounting holes.

3. The recyclable casing for bored piles as described in claim 1, characterized in that, The thickness of the thin-walled casing (1) is less than the thickness of the temporary casing (2).

4. The recyclable casing for bored piles as described in claim 3, characterized in that, The ratio of the thickness of the thin-walled casing (1) to the thickness of the temporary casing (2) is set to 0.18 to 0.

22.

5. The recyclable casing for bored piles as described in claim 1, characterized in that, The top surface of the temporary casing (2) is higher than the top surface of the thin-walled casing (1).

6. The recyclable casing for bored piles as described in claim 1, characterized in that, Along the axial direction of the thin-walled casing (1), the length of the overlapping portion of the thin-walled casing (1) and the temporary casing (2) is set to be 50% to 60% of the total length of the thin-walled casing (1).

7. The recyclable casing for bored piles as described in claim 1, characterized in that, The thin-walled casing (1) includes multiple first casing sections, which are joined together by threads along the axial direction of the first casing. The temporary casing (2) is sleeved on the outside of the first casing, and at least one first casing section is inserted into the temporary casing (2) through the connector (3).

8. The recyclable casing for bored piles as described in claim 1, characterized in that, The thin-walled casing (1) is made of steel or PVC polymer material.

9. An underwater drilled cast-in-place pile, characterized in that, It includes: Thin-walled casing (1), the thin-walled casing (1) is inserted into the underwater pile foundation hole, a temporary casing (2) is sleeved on one end of the thin-walled casing (1) near the opening of the pile foundation hole, and the temporary casing (2) is sleeved on the outside of the thin-walled casing (1), and the temporary casing (2) and the thin-walled casing (1) are connected by a connector (3) along the radial direction of the thin-walled casing (1); Along the axial direction of the thin-walled casing (1), the length of the temporary casing (2) is less than the length of the thin-walled casing (1); A reinforcing cage (4) is inserted into the thin-walled casing (1); Concrete (5), which is filled inside the thin-walled casing (1).

10. The underwater drilled cast-in-place pile as described in claim 9, characterized in that, The steel cage (4) is connected to the thin-walled casing (1) via a connecting device (6).

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