Demolition structure for concrete enclosing purlin and support of deep foundation pit support

Abstract

The utility model discloses a demolition structure for a deep foundation pit supporting concrete enclosing purlin and a support, and relates to the technical field of dry dock deep foundation pits. The dismantling structure comprises a plurality of foundation pit fender posts arranged in the same direction and a concrete enclosing purlin connected with the foundation pit fender posts. A concrete support is connected between the concrete enclosing purlins which intersect in the extending direction; any concrete enclosing purlin or concrete support is provided with a cutting mark; longitudinal supporting structures are arranged at the bottom of the concrete enclosing purlin or the concrete support, and the supporting structures are at least located on the two sides of the cutting mark. The inclined cutting marks are arranged on the concrete enclosing purlins and the concrete supports, and the supporting structures at the bottoms are arranged on the two sides of the cutting marks, so that the cutting units fall on the supporting structures after cutting is completed. And the dismounted cutting unit can be conveniently transported out of the deep foundation pit. The construction is convenient, fast and efficient, the influence on the foundation pit fender posts and the surrounding environment is small, the site occupation in the deep foundation pit and the disintegrating slag cleaning time are reduced, and operation can be conducted in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of dry dock deep foundation pits, and more specifically to a dismantling structure for supporting concrete purlins and supports in a deep foundation pit. Background Art

[0002] A dry dock is a man-made, shore-side dock primarily used for building, refitting, and repairing ships. Typically built on land near coastal waters, a dry dock is a rectangular, solid concrete structure. Three sides of this type of dock are land-bound, and one side faces water. Its basic components include a dock entrance, a dock chamber, and a bow. The entrance is used for ship entry and exit and is equipped with a water-retaining dock door, while the dock chamber is used for ship storage and has keel piers and side piers on its floor to support the ship.

[0003] Deep pit safety is paramount in dry dock support projects, particularly in areas with abundant groundwater and mudflats. Within the pit, as construction progresses on the main dock structure, concrete purlins and supports are removed layer by layer. Traditional demolition methods, such as jackhammering and static blasting, are inefficient, noisy, and significantly impact the pit retaining piles, the main structure, and the surrounding environment. Post-demolition cleaning also requires both manual labor and equipment, significantly compromising dock operations. Utility Model Content

[0004] In view of this, the utility model provides a dismantling structure for deep foundation pit supporting concrete purlins and supports, which can quickly and conveniently dismantle the concrete purlins and supports with minimal impact on the surrounding environment.

[0005] The utility model provides a deep foundation pit supporting concrete purlin and support dismantling structure, comprising: a plurality of foundation pit supporting piles arranged in the same direction and a concrete purlin connecting the plurality of foundation pit supporting piles;

[0006] Concrete supports are connected between the concrete purlins whose extension directions intersect;

[0007] A cutting mark is provided on any of the concrete purlins or the concrete supports;

[0008] A longitudinal support structure is provided at the bottom of the concrete purlin or the concrete support, and the support structure is at least located on both sides of the cutting mark.

[0009] In a possible implementation, the extension line of the cutting mark intersects with the extension line of the concrete purlin or the concrete support, and they are not perpendicular to each other.

[0010] In a possible implementation, the extension lines of adjacent cutting marks on the same concrete purlin or the concrete support intersect.

[0011] In a possible implementation, the adjacent cutting marks on the same concrete purlin or the concrete support are in an "eight" shape.

[0012] In a possible implementation, the support structure includes a vertically arranged tubular steel pile support and sleepers arranged between the tubular steel pile support and the concrete purlin or the concrete support.

[0013] In a possible implementation, the concrete purlin located between adjacent foundation pit retaining piles is provided with a threading hole;

[0014] At least part of the cutting marks on the concrete purlin are connected to the threading holes.

[0015] In a possible implementation, the cutting mark before removal is the cutting seam after removal.

[0016] In a possible implementation, a wire saw cutting machine is arranged along the cutting mark frame.

[0017] In a possible implementation, the wire saw cutting machine includes a frame, a pulley block and a diamond wire saw;

[0018] The pulley assembly is arranged on the frame;

[0019] The diamond wire saw is wound on the pulley block and surrounds the concrete purlin or concrete support;

[0020] The diamond wire saw overlaps with the cutting mark.

[0021] In a possible implementation, the wire saw cutting machine further includes a cold water pipe;

[0022] One end of the cold water pipe is connected to the water source, and the other end is aligned with the cutting seam.

[0023] Compared with the prior art, the deep foundation pit support concrete purlin and support dismantling structure provided by the present invention achieves at least the following beneficial effects:

[0024] In the embodiment provided by the present invention, inclined cutting marks are provided on the concrete purlins and concrete supports, and bottom support structures are provided on both sides of the cutting marks, so that the cutting unit can land on the support structures after cutting is completed. This facilitates the removal of the cutting unit from the deep foundation pit. Moreover, compared with existing technologies, the present invention is more convenient, faster, and more efficient, with less impact on the foundation pit retaining piles and the surrounding environment, reducing the space occupied in the deep foundation pit and the time required to clean up the debris, and can operate in a small space.

[0025] Of course, any product implementing the present utility model does not necessarily need to achieve all the technical effects described above at the same time.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0028] Figure 1 A schematic diagram of a structure for dismantling a deep foundation pit supporting concrete purlin and support provided by the utility model;

[0029] Figure 2 The utility model provides a structural schematic diagram of a wire saw cutting machine. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] The present invention provides a dismantling structure for supporting concrete purlins and supports in a deep foundation pit. Figure 1 As shown, the embodiment of the present invention provides a deep foundation pit supporting concrete purlin and support dismantling structure, comprising: a plurality of foundation pit retaining piles 10 arranged in the same direction and a concrete purlin 30 connecting the plurality of foundation pit retaining piles;

[0036] Concrete supports 40 are connected between the concrete purlins 30 that intersect in the extension direction;

[0037] A cutting mark 01 is provided on any concrete purlin 30 or concrete support 40;

[0038] A longitudinal support structure 02 is provided at the bottom of the concrete purlin 30 or the concrete support 40 . The support structure 02 is located at least on both sides of the cutting mark 01 .

[0039] It is understandable that the deep foundation pit of the dry dock is a rectangular concrete structure with one end open, and the open end is the dock entrance for ships to enter and exit. After tying the steel bars and setting up the formwork, the main body of the deep foundation pit is cast, which specifically includes the foundation pit retaining piles 10 and the foundation pit retaining steel plates 20. The foundation pit retaining steel plates 20 are connected between adjacent foundation pit retaining piles 10. The foundation pit retaining piles 10 and the foundation pit retaining steel plates 20 are connected to form a rectangle with one end open, and then concrete purlins 30 and concrete supports 40 are cast on the inner side of the foundation pit retaining piles 10 and the foundation pit retaining steel plates 20 and maintained in time. The concrete supports 40 are connected between the intersecting concrete purlins 30, and multiple ones can be provided. When their strength meets the requirements for dismantling the supports, the concrete purlins 30 and concrete supports 40 are removed.

[0040] First, based on the lifting capacity of the hoisting equipment and the cross-sectional dimensions of the concrete purlin 30 and concrete support 40, the cutting unit size and cutting location are calculated and determined. A cutting location design layout is drawn, and a line is drawn on the concrete purlin 30 and concrete support 40 to mark the cutting mark 01. The cutting mark 01 before demolition will become the cutting seam 50 after demolition.

[0041] Furthermore, the extension line of the cutting mark 01 intersects with the extension line of the concrete purlin 30 or the concrete support 40, and they are not perpendicular to each other. That is to say, the cutting mark 01 (cutting seam 50) is set obliquely in the length direction of the concrete purlin 30 or the concrete support 40. This can prevent the stress from being suddenly released after the concrete purlin 30 and the concrete support 40 are cut, and the two adjacent cutting units are squeezed together and cannot be lifted. The same concrete purlin 30 and concrete support 40 are provided with multiple cutting marks 01, which divide the concrete purlin 30 and the concrete support 40 into multiple cutting units. The extension lines of the cutting marks 01 intersect. That is to say, the adjacent cutting marks 01 are in the shape of an "eight", and the cut concrete purlin 30 and concrete support 40 are trapezoidal.

[0042] In an optional embodiment, a threading hole 31 is provided on the concrete purlin 30 located between adjacent pit retaining piles 10. The threading hole 31 is in close contact with the pit retaining steel plate 20 and has a size of 150×300 mm. At least part of the cutting mark 01 on the concrete purlin 30 is connected to the threading hole 31. During cutting, a diamond wire saw 033 can be inserted through this threading hole 31, solving the problem of being unable to thread the wire saw due to the close contact between the concrete purlin 30 and the pit retaining pile 10. The special reserved hole can also be used as a hole for tying the wire rope when the cutting unit is hoisted, ensuring safer lifting.

[0043] Next, a support structure 02 is installed beneath the concrete purlin 30 and concrete support 40. Specifically, the support structure 02 consists of vertically mounted steel pile supports 021 and sleepers 022 positioned between the steel pile supports 021 and the concrete purlin 30 or support 40. The steel pile supports 021 and sleepers 022 are temporary structures and can be moved to other cutting lines 50 after the concrete purlin 30 or support 40 cutting units are cut and hoisted away. It is important to note that both sides of multiple cutting marks 01 on the same concrete purlin 30 or support 40 must be fully supported before cutting.

[0044] Next, a wire saw cutting machine 03 is set up along the cutting mark 01. Specifically, refer to Figure 2 As shown, the wire saw cutting machine 03 includes a frame 031, a pulley block 032 and a diamond wire saw 033;

[0045] The pulley block 032 is arranged on the frame 031; the diamond wire saw 033 is wound around the pulley block 032 and can move under the drive of the pulley block 032 and surround the concrete purlin 30 or the concrete support 40. The diamond wire saw 033 rotates at high speed, causing it to rub against the concrete purlin 30 or the concrete support 40 to achieve the cutting purpose; the wire saw cutting machine 03 also includes a cold water pipe 034; one end of the cold water pipe 034 is connected to the water source, and the other end is aligned with the cutting seam 50.

[0046] According to the planned position, the diamond wire saw 033 is aligned with the cutting mark 01. Safety and warning signs are placed around the wire saw 03. The wire saw is inspected, the power supply and cooling water are connected, and commissioning is completed. Once the power is turned on, the diamond wire saw 033 rotates at high speed. Simultaneously, cooling water is continuously delivered to the cutting seam 50 through the cold water pipe 034, pouring onto the diamond wire saw 033 to prevent the diamond wire saw 033 from breaking or becoming immobile due to friction with the concrete purlin 30 or concrete support 40, resulting in high temperatures.

[0047] Finally, the finished cutting unit is stably placed on support structure 02, hoisted outside the deep foundation pit using a crawler crane, and transported to the designated location by a dump truck. Once all cutting units are cut and transported, the concrete purlins and supports of the deep foundation pit are removed.

[0048] In summary, the dismantling structure of the deep foundation pit supporting concrete purlin and support provided by the present invention achieves at least the following beneficial effects:

[0049] In the embodiment provided by the present invention, inclined cutting marks are provided on the concrete purlins and concrete supports, and bottom support structures are provided on both sides of the cutting marks, so that the cutting unit can land on the support structures after cutting is completed. This facilitates the removal of the cutting unit from the deep foundation pit. Moreover, compared with existing technologies, the present invention is more convenient, faster, and more efficient, with less impact on the foundation pit retaining piles and the surrounding environment, reducing the space occupied in the deep foundation pit and the time required to clean up the debris, and can operate in a small space.

[0050] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A dismantling structure for supporting concrete purlins and supports in a deep foundation pit, characterized in that: include: A plurality of foundation pit retaining piles arranged in the same direction and a concrete purlin connecting the plurality of foundation pit retaining piles; Concrete supports are connected between the concrete purlins whose extension directions intersect; A cutting mark is provided on any of the concrete purlins or the concrete supports; A longitudinal support structure is provided at the bottom of the concrete purlin or the concrete support, and the support structure is at least located on both sides of the cutting mark.

2. The demolition structure according to claim 1, characterized in that: The extension line of the cutting mark intersects with the extension line of the concrete purlin or the concrete support, and they are not perpendicular to each other.

3. The demolition structure according to claim 2, characterized in that: The extension lines of adjacent cutting marks on the same concrete purlin or concrete support intersect.

4. The dismantling structure according to claim 3, characterized in that: The adjacent cutting marks on the same concrete purlin or the concrete support are in an "eight" shape.

5. The demolition structure according to claim 1, characterized in that: The support structure includes a vertically arranged steel pipe pile support and sleepers arranged between the steel pipe pile support and the concrete purlin or the concrete support.

6. The demolition structure according to claim 1, characterized in that: The concrete purlins located between adjacent foundation pit retaining piles are provided with threading holes; At least part of the cutting marks on the concrete purlin are connected to the threading holes.

7. The demolition structure according to claim 1, characterized in that: The cutting mark before removal is the cutting seam after removal.

8. The demolition structure according to claim 7, characterized in that: A rope saw cutting machine is arranged along the cutting marking frame.

9. The demolition structure according to claim 8, characterized in that: The wire saw cutting machine comprises a frame, a pulley block and a diamond wire saw; The pulley assembly is arranged on the frame; The diamond wire saw is wound on the pulley block and surrounds the concrete purlin or concrete support; The diamond wire saw overlaps with the cutting mark.

10. The demolition structure according to claim 9, characterized in that: The wire saw cutting machine further comprises a cold water pipe; One end of the cold water pipe is connected to the water source, and the other end is aligned with the cutting seam.

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