Fabricated crown coupling beam double-row cast-in-place pile supporting structure

Abstract

The utility model provides a fabricated crown coupling beam double-row cast-in-place pile supporting structure, and relates to the technical field of building construction. The crown coupling beam of the supporting structure comprises a first sleeve pile piece, a second sleeve pile piece and a connecting bridge. The top of the front-row pile or the top of the rear-row pile is sleeved with the first pile sleeving pieces, the top of the front-row pile is sleeved with the second pile sleeving pieces, and the adjacent first pile sleeving pieces are connected through the second pile sleeving pieces or connecting bridges; the diameters of pile holes formed in the first sleeve pile piece and the second sleeve pile piece are slightly larger than the diameters of the cast-in-place piles, installation is convenient, a certain error fault-tolerant space is provided for construction of the cast-in-place piles, and the gaps between the pile holes and the piles are filled with the closed-cell foam plates so that load transmission between the cast-in-place piles can be guaranteed. And the crown coupling beam is convenient to assemble and disassemble and can be repeatedly used, the construction period is greatly shortened, and material waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a prefabricated double-row cast-in-place pile support structure for a crown-connecting beam. Background Technology

[0002] The support depth of the double-row cast-in-place pile support structure can reach more than ten meters, and it can significantly control the displacement of the pile top. It is widely used in temporary works for deep foundation pit excavation in water conservancy projects.

[0003] The double-row cast-in-place pile support structure mainly consists of a front row of piles, a rear row of piles, a connecting beam, and a capping beam. The front row of piles primarily serves to retain soil, while the rear row of piles also serves to retain soil and anchor the front row. The capping beam connects the pile heads, creating an elastic constraint, and the connecting beam connects the front and rear rows of piles and transfers loads. Currently, the commonly used pile arrangement in engineering is a T-shaped arrangement, where the front row of piles is spaced closer together, forming a wall-like structure that effectively retains soil, while the rear row of piles is spaced further apart, primarily serving to anchor the front row.

[0004] The typical construction process for a double-row cast-in-place pile support structure involves on-site positioning and drilling, followed by the insertion of a reinforcing cage and the pouring of concrete to form the front and rear rows of piles. Once the concrete has reached the required strength, reinforced concrete or lightly reinforced concrete is placed on top of the front and rear rows of piles to form a capping beam and connecting beam. When the spacing between the front rows of piles is slightly larger, high-pressure jet grouting piles can be installed on the rear side between adjacent piles in the front row to address the issue of soil leakage between the piles. After the temporary works are completed, the concrete capping beam, connecting beam, front rows of piles, and rear rows of piles that exceed the ground elevation are removed. To reduce the amount of demolition work, the front and rear rows of piles below the ground elevation are retained.

[0005] In the temporary works of double-row cast-in-place pile support structure, the crown beam is constructed by on-site concrete pouring, which cannot be reused. Demolition not only wastes materials but also prolongs the construction time. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a prefabricated double-row cast-in-place pile support structure with a connecting beam, which solves the problem that the connecting beams and cap beams of the double-row cast-in-place pile support structure cannot be reused, resulting in material waste and extended construction period.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A prefabricated double-row cast-in-place pile support structure with a capping beam, the support structure comprising: a front row of piles, a rear row of piles, and a capping beam;

[0009] The crown-connecting beam includes: a first set of piles, a second set of piles, and a connecting bridge;

[0010] The first set of piles has a vertical through hole in the middle, and the first set of piles is fitted onto the top of the front row of piles or the rear row of piles through the first hole.

[0011] The second set of piles has a vertical through hole in the middle, and the second set of piles is fitted onto the top of the front piles through the second hole.

[0012] Adjacent first sets of piles are connected by second sets of piles or connecting bridges;

[0013] The front and rear rows of piles have the same diameter, which is slightly smaller than the diameter of the first and second sets of pile holes.

[0014] Closed-cell foam board is used to fill the gaps between pile holes and piles.

[0015] Preferably, the first set of pile members is provided with a plurality of first lifting lugs on the left, right and front faces, and the second set of pile members is provided with a plurality of second lifting lugs on the left and right faces. After the bolt passes through the first and second lifting lugs, it is threadedly connected to the nut to realize the connection between the first set of pile members and the second set of pile members.

[0016] Preferably, the connecting bridge comprises: a first I-beam and a second I-beam;

[0017] The first I-beam has a third lifting lug at both ends of its upper and lower flanges;

[0018] The second I-beam has a fourth lifting lug at both ends of its upper and lower flanges. The length of the second I-beam is √2 times the length of the first I-beam.

[0019] Four first I-beams are connected end to end by the third lifting lug to form a connecting frame; the fourth lifting lugs at both ends of the second I-beams are connected to the third lifting lugs at the diagonal positions of the connecting frame;

[0020] The connecting bridge is formed by connecting several connecting frames end to end.

[0021] Preferably, the third lifting lug is connected to the first lifting lug, and the third and fourth lifting lugs are connected to the first lifting lug, thereby realizing the connection between the first set of piles and the connecting bridge.

[0022] Preferably, the lifting lugs are connected to each other by bolts and nuts.

[0023] Preferably, the support structure further includes: a plurality of corbels;

[0024] The brackets are installed on the outer walls of the front and rear piles, and the top surfaces of all the brackets are set at the same height. The brackets are used to support the first and second sets of piles.

[0025] Preferably, the support structure further includes: a plurality of high-pressure jet grouting piles;

[0026] The high-pressure jet grouting piles are installed behind the gaps in the front row of piles.

[0027] This utility model provides a prefabricated double-row cast-in-place pile support structure with a crown-connected beam. Compared with the prior art, it has the following advantages:

[0028] In this utility model, the crown-connecting beam of the support structure includes: a first set of piles, a second set of piles, and a connecting bridge; the first set of piles is fitted on the top of the front row of piles or the rear row of piles, and the second set of piles is fitted on the top of the front row of piles; adjacent first sets of piles are connected by the second set of piles or the connecting bridge; the diameter of the pile holes in the first set of piles and the second set of piles is slightly larger than the diameter of the cast-in-place piles to facilitate installation and provide a certain error tolerance space for the construction of the cast-in-place piles; the gap between the pile holes and the piles is filled with closed-cell foam board to ensure the load transfer between the cast-in-place piles; and the crown-connecting beam is easy to install and remove, can be reused, greatly shortens the construction period, and reduces material waste. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an engineering schematic diagram of the support structure in an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the support structure in an embodiment of the present utility model;

[0032] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0033] Figure 4 This is a schematic diagram of the assembly of the crown beam and the front piles in an embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the first set of piles in the embodiment of this utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the second set of piles in this embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the first I-beam in an embodiment of this utility model;

[0037] Figure 8 This is a top view of the support structure in an embodiment of this utility model;

[0038] The reference numerals in the figure are set as follows: front pile 01, rear pile 02, corbel 03, high-pressure jet grouting pile 04, first set of pile components 10, first set of pile holes 11, first lifting lug 12, second set of pile components 20, second set of pile holes 21, second lifting lug 22, first I-beam 30, third lifting lug 31, and second I-beam 40. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] This application provides a prefabricated double-row cast-in-place pile support structure with a cap beam, which solves the problem that the connecting beams and cap beams of the double-row cast-in-place pile support structure cannot be reused, resulting in material waste and extended construction period.

[0041] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0042] Example:

[0043] like Figures 1 to 8 As shown, this utility model provides a prefabricated double-row cast-in-place pile support structure with a crown-connecting beam. The support structure includes: a front row of piles 01, a rear row of piles 02, and a crown-connecting beam.

[0044] The crown-connecting beam includes: a first set of pile members 10, a second set of pile members 20, and a connecting bridge;

[0045] The first set of piles 10 has a vertical through-hole 11 in the middle, and the first set of piles 10 is fitted onto the top of the front row of piles 01 or the rear row of piles 02 through the first set of piles 11.

[0046] The second set of pile members 20 has a vertically penetrating second set of pile holes 21 in the middle, and the second set of pile members 20 is fitted onto the top of the front row of piles 01 through the second set of pile holes 21;

[0047] Adjacent first set of piles 10 are connected by second set of piles 20 or connecting bridges;

[0048] The front row of piles 01 and the rear row of piles 02 have the same diameter, which is slightly smaller than the diameter of the first set of pile holes 11 and the second set of pile holes 21.

[0049] After the first set of piles 10, the second set of piles 20 and the connecting bridge are connected, the gap between the pile holes and the piles is filled with closed-cell foam board; that is, the gap between the first set of pile holes 11 and the front row of piles 01 or the rear row of piles 02 is filled with closed-cell foam board, and the gap between the second set of pile holes 21 and the front row of piles 01 is filled with closed-cell foam board.

[0050] During the construction of the support structure, the components of the crown beam are designed with various specifications based on the common pile diameter and spacing of double-row cast-in-place piles, giving the crown beam strong versatility. The pile hole diameter is slightly larger than the cast-in-place pile diameter for easy installation, providing a certain margin of error for the construction of the cast-in-place piles. The gap between the pile hole and the pile is filled with closed-cell foam board to ensure the load transfer between the cast-in-place piles. The crown beam is easy to install and disassemble, can be reused, greatly shortens the construction period, and reduces material waste.

[0051] like Figures 4-6 As shown, the first set of pile members 10 is provided with a plurality of first lifting lugs 12 on its left, right and front faces, and the second set of pile members 20 is provided with a plurality of second lifting lugs 22 on its left and right faces. After the bolt passes through the first lifting lugs 12 and the second lifting lugs 22, it is threadedly connected to the nut to realize the connection between the first set of pile members 10 and the second set of pile members 20.

[0052] like Figure 3 , Figure 7 As shown, the connecting bridge includes: a first I-beam 30 and a second I-beam 40;

[0053] The first I-beam 30 is provided with a third lifting lug 31 at both ends of its upper and lower flanges;

[0054] The second I-beam 40 is provided with a fourth lifting lug at both ends of its upper and lower flanges. The length of the second I-beam 40 is √2 times the length of the first I-beam 30.

[0055] Four first I-beams 30 are connected end to end by third lifting lugs 31 to form a connecting frame; the fourth lifting lugs at both ends of the second I-beams 40 are connected to the third lifting lugs 31 at the diagonal position of the connecting frame to provide positioning support for the connecting frame;

[0056] The connecting bridge is formed by connecting several connecting frames end to end.

[0057] The third lifting lug 31 is connected to the first lifting lug 12, and the third lifting lug 31 and the fourth lifting lug are connected to the first lifting lug 12, thereby realizing the connection between the first set of piles 10 and the connecting bridge.

[0058] The lifting lugs are connected to each other using bolts and nuts.

[0059] like Figures 1-4 As shown, the support structure also includes: several corbels 03;

[0060] The bracket 03 is installed on the outer wall of the front row of piles 01 and the rear row of piles 02. The top surfaces of all brackets 03 are set at the same height. The brackets 03 are used to support the first set of pile components 10 and the second set of pile components 20.

[0061] like Figures 1-3 As shown, the support structure also includes: a plurality of high-pressure jet grouting piles 04;

[0062] The high-pressure jet grouting pile 04 is positioned behind the gaps in the front row of piles 01 to prevent soil leakage caused by excessive spacing between the front row of piles 01.

[0063] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0064] In this embodiment of the utility model, the crown beam of the support structure includes: a first set of pile members 10, a second set of pile members 20, and a connecting bridge; the first set of pile members 10 is fitted on the top of the front row of piles 01 or the rear row of piles 02, and the second set of pile members 20 is fitted on the top of the front row of piles 01. Adjacent first sets of pile members 10 are connected by the second set of pile members 20 or the connecting bridge; the diameter of the pile holes opened by the first set of pile members 10 and the second set of pile members 20 is slightly larger than the diameter of the cast-in-place piles to facilitate installation and provide a certain error tolerance space for the construction of cast-in-place piles. The gap between the pile holes and the piles is filled with closed-cell foam board to ensure the load transfer between the cast-in-place piles; and the crown beam is easy to install and remove, can be reused, greatly shortens the construction period, and reduces material waste.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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.

[0066] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A prefabricated double-row cast-in-place pile support structure with a crown-connected beam, characterized in that, The support structure includes: front row of piles (01), rear row of piles (02), and capping beam; The crown-connecting beam includes: a first set of piles (10), a second set of piles (20), and a connecting bridge; The first set of pile members (10) has a vertically penetrating first set of pile holes (11) in the middle, and the first set of pile members (10) is sleeved on the top of the front row of piles (01) or the rear row of piles (02) through the first set of pile holes (11); The second set of pile members (20) has a vertically penetrating second set of pile holes (21) in the middle, and the second set of pile members (20) is fitted onto the top of the front row of piles (01) through the second set of pile holes (21); The adjacent first set of piles (10) are connected by a second set of piles (20) or a connecting bridge; The front row of piles (01) and the rear row of piles (02) have the same pile diameter, which is slightly smaller than the diameter of the first set of pile holes (11) and the second set of pile holes (21). Closed-cell foam board is used to fill the gaps between pile holes and piles.

2. The prefabricated double-row cast-in-place pile support structure with crown-connected beam as described in claim 1, characterized in that, The first set of pile members (10) has a number of first lifting lugs (12) on its left, right and front sides, and the second set of pile members (20) has a number of second lifting lugs (22) on its left and right sides. The bolt passes through the first lifting lugs (12) and the second lifting lugs (22) and is threadedly connected to the nut to realize the connection between the first set of pile members (10) and the second set of pile members (20).

3. The prefabricated double-row cast-in-place pile support structure with a crown-connected beam as described in claim 1, characterized in that, The connecting bridge includes: a first I-beam (30) and a second I-beam (40); The first I-beam (30) is provided with third lifting lugs (31) at both ends of the upper and lower flanges; The second I-beam (40) is provided with a fourth lifting lug at both ends of the upper and lower flanges. The length of the second I-beam (40) is √2 times the length of the first I-beam (30). Four first I-beams (30) are connected end to end by the third lifting lug (31) to form a connecting frame; the fourth lifting lugs at both ends of the second I-beams (40) are connected to the third lifting lug (31) at the diagonal position of the connecting frame; The connecting bridge is formed by connecting several connecting frames end to end.

4. The prefabricated double-row cast-in-place pile support structure with a crown-connecting beam as described in claim 3, characterized in that, The third lifting lug (31) is connected to the first lifting lug (12), and the third lifting lug (31) and the fourth lifting lug are connected to the first lifting lug (12) to realize the connection between the first set of piles (10) and the connecting bridge.

5. The prefabricated double-row cast-in-place pile support structure with crown-connected beams as described in claim 3 or 4, characterized in that, The lifting lugs are connected to each other using bolts and nuts.

6. The prefabricated double-row cast-in-place pile support structure with a crown-connecting beam as described in claim 1, characterized in that, The support structure also includes: several corbels (03); The brackets (03) are set on the outer walls of the front row of piles (01) and the rear row of piles (02). The top surfaces of all the brackets (03) are set at the same height. The brackets (03) are used to support the first set of pile members (10) and the second set of pile members (20).

7. The prefabricated double-row cast-in-place pile support structure with a crown-connecting beam as described in claim 1, characterized in that, The support structure also includes: several high-pressure jet grouting piles (04); The high-pressure jet grouting pile (04) is located behind the gap of the front row of piles (01).

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