Steel sheet pile support structure and construction method thereof

Abstract

The present invention provides a steel sheet pile support structure applied to the technical field of pit foundation support engineering construction. The present invention also relates to a steel sheet pile support construction method. The steel sheet pile (1) of the steel sheet pile support structure is provided with an abdominal cavity (2) capable of penetrating the steel sheet pile (1). A drill rod (3) is movably installed in the abdominal cavity (2). The upper end of the drill rod (3) is connected to a motor. A drill bit (4) is installed at the lower end of the drill rod (3). The drill bit (4) is an inverted cone structure. A hollow conveying pipe (5) is provided inside the drill rod (3). A nozzle (6) is provided inside the drill bit (4). The nozzle (6) is connected to the conveying channel (5). A plurality of spray holes (7) connecting the nozzle (6) and the outside of the drill bit (4) are further provided on the drill bit (5). The steel sheet pile support structure of the present invention can overcome the problem that steel sheet piles are difficult to drive into hard strata such as gravel layers, reduce the disturbance of surrounding soil caused by the removal of steel sheet piles, and improve the operation efficiency of steel sheet piles.

Description

Technical Field

[0001] The present invention belongs to the technical field of pit foundation support engineering construction, and more specifically, relates to a steel sheet pile support structure. The present invention also relates to a steel sheet pile support construction method. Background Art

[0002] Steel sheet pile support structures offer advantages such as strong bearing capacity, excellent watertightness, simple construction, efficient operation, and recyclable materials. They meet requirements for structural safety, energy conservation, and environmental protection, and are widely used in support structures across various construction projects. However, existing steel sheet pile support technologies are primarily suitable for use in soft strata such as silt, silt, and silty clay. Hard strata such as gravel can hinder the driving of steel sheet piles. Furthermore, after the support project is completed, the removal of the steel sheet piles will disturb the surrounding soil. Therefore, existing technologies cannot effectively meet these requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a steel sheet pile support structure is provided which can effectively overcome the problem that steel sheet piles are difficult to drive into hard strata such as gravel layers, reduce the disturbance to the surrounding soil caused by the removal of steel sheet piles, and improve the efficiency of steel sheet pile operations.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0005] The present invention relates to a steel sheet pile support structure, comprising steel sheet piles, an abdominal cavity capable of penetrating the steel sheet piles being provided on the steel sheet piles, a drill rod being movably installed in the abdominal cavity, the upper end of the drill rod being connected to a motor, a drill bit being installed at the lower end of the drill rod, the drill bit being an inverted cone-shaped structure, a delivery pipeline having a hollow structure being provided inside the drill rod, a nozzle being provided inside the drill bit, the nozzle being connected to the delivery channel, and a plurality of spray holes connecting the nozzle head and the outside of the drill bit being provided on the drill bit.

[0006] The steel sheet pile comprises a belly cavity and a web, wherein the web is located at the upper end of the steel sheet pile, a plug is arranged on one side of the web, and a socket is arranged on the other side of the web.

[0007] A thread sleeve is arranged near the upper end of the drill rod, a thread hole is arranged near the upper end of the abdominal cavity, and the drill rod is screwed through the thread hole through the thread sleeve.

[0008] The plug is configured as a protruding structure, the socket is configured as a recessed structure, the plug is configured as a T-shaped structure, and the socket is configured as a T-shaped structure.

[0009] The abdominal cavity is a cylindrical structure, and the abdominal cavity and the belly plate are connected by an arc transition.

[0010] The nozzle is a conical structure. A plurality of nozzle holes are arranged at intervals along the drill bit. A nozzle is installed in each nozzle hole. The nozzle does not protrude from the side of the drill bit, and the outer end of the nozzle is set to a downward inclined structure.

[0011] The delivery channel is connected to the first pipe opening of the tee, the second pipe opening of the tee is connected to the high-pressure water supply component, and the third pipe opening of the tee is connected to the slurry supply component.

[0012] The present invention also relates to a steel sheet pile support construction method which can effectively overcome the problem of difficulty in driving steel sheet piles into hard strata such as gravel layers, reduce the disturbance to the surrounding soil caused by the removal of steel sheet piles, and improve the efficiency of steel sheet pile operations.

[0013] The construction method is as follows: 1) when driving steel sheet piles, if encountering hard strata where it is difficult to drive the steel sheet piles into the stratum, the motor is started, and the motor drives the drill bit to drill through the drill rod, and at the same time, the high-pressure water supply component is turned on to supply high-pressure water to assist sinking; 2) when the steel sheet pile support structure is completed and the steel sheet piles are removed, the slurry supply component is turned on to spray slurry to reinforce the soil in the gap after the steel sheet piles are pulled out.

[0014] Before driving the steel sheet piles, first fit the plug of the corresponding steel sheet pile and the socket of an adjacent steel sheet pile into the bite joint, then fit the socket of the corresponding steel sheet pile and the plug of another adjacent steel sheet pile into the bite joint, and then apply force to drive the steel sheet piles in.

[0015] Before driving the steel sheet piles, first position and lay out the steel sheet piles to determine the driving position of the steel sheet piles, and then clamp and bite the corresponding steel sheet piles.

[0016] The technical solution of the present invention can achieve the following beneficial effects:

[0017] The steel sheet pile support structure and construction method described in this invention address shortcomings in existing technology and the specific requirements of steel sheet pile support structures by improving both their structure and methods. During construction, when driving a steel sheet pile into hard ground presents difficulties, the motor is activated, driving the drill bit through the drill rod, while the high-pressure water supply is activated to supply high-pressure water to aid sinking. After the steel sheet pile support structure is in use and the steel sheet pile is removed, the slurry supply is activated to spray slurry, reinforcing the soil in the gap left by the removed steel sheet pile. Before driving the steel sheet pile, the corresponding steel sheet pile's plug is first engaged with the socket of the adjacent steel sheet pile, and then the socket of the corresponding steel sheet pile is engaged with the plug of the adjacent steel sheet pile. The steel sheet pile is then driven in with force. Before driving the steel sheet pile, the steel sheet piles are first positioned and laid out to determine their driving positions, and then the corresponding steel sheet piles are engaged. This allows for control tailored to the specific requirements of steel sheet pile driving and removal. During sheet pile installation, the drill bit is driven by the drill rod to advance the hole, while high-pressure water assists in cutting the rock strata, ensuring smooth penetration of the sheet piles into hard strata and improving the efficiency of the sheet pile installation operation. When the sheet piles are removed, grouting is performed simultaneously through the nozzles to minimize disturbance to the surrounding soil. This effectively meets the requirements and reduces the construction difficulty of sheet pile installation. The steel sheet pile support structure described in this invention can overcome the difficulty of driving steel sheet piles into hard strata such as gravel, reduce the disturbance to the surrounding soil caused by the removal of the steel sheet piles, and improve operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 This is a schematic diagram of the main structure of the steel sheet pile supporting structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the top view of the steel sheet pile support structure of the present invention;

[0021] Figure 3 This is a schematic structural diagram of a drill bit for the steel sheet pile support structure of the present invention;

[0022] The marks in the accompanying drawings are: 1. Steel sheet pile; 2. Abdominal cavity; 3. Drill rod; 4. Drill bit; 5. Delivery pipe; 6. Nozzle; 7. Spray hole; 8. Web; 9. Plug; 10. Socket; 11. Thread sleeve; 12. Thread hole; 13. Nozzle. DETAILED DESCRIPTION

[0023] The following describes the embodiments with reference to the accompanying drawings to further explain in detail the specific embodiments of the present invention, such as the shapes, structures, mutual positions and connection relationships between the various components involved, the functions and working principles of the various components.

[0024] As attached Figure 1 -Attached Figure 3 As shown, the present invention is a steel sheet pile support structure, including a steel sheet pile 1, an abdominal cavity 2 capable of penetrating the steel sheet pile 1 is provided on the steel sheet pile 1, a drill rod 3 is movably installed in the abdominal cavity 2, the upper end of the drill rod 3 is connected to a motor, and a drill bit 4 is installed at the lower end of the drill rod 3. The drill bit 4 is an inverted cone structure, a hollow conveying pipe 5 is provided inside the drill rod 3, a nozzle 6 is provided inside the drill bit 4, and the nozzle 6 is connected to the conveying channel 5, and a plurality of spray holes 7 connecting the nozzle 6 and the outside of the drill bit 4 are also provided on the drill bit 5. The above structure addresses shortcomings in existing technology and the special needs of steel sheet pile support structures, resulting in improvements in both structure and method. During construction, the following method is used: When driving a steel sheet pile into hard ground, if the pile becomes difficult to drive, the motor is activated, driving the drill bit through the drill rod, while the high-pressure water supply is activated to supply high-pressure water to aid sinking. After the steel sheet pile support structure is completed and the steel sheet pile is removed, the slurry supply is activated to spray slurry to reinforce the soil in the gap left by the removed steel sheet pile. Before driving a steel sheet pile (1), the plug (9) of the corresponding steel sheet pile (1) and the socket (10) of the adjacent steel sheet pile (1) are first engaged, and then the socket (10) of the corresponding steel sheet pile (1) and the plug (9) of the adjacent steel sheet pile (1) are engaged. The steel sheet pile (1) is then driven in with force. Before driving the steel sheet pile (1), the steel sheet pile (1) is positioned and laid out to determine its driving position, and then the corresponding steel sheet pile (1) is engaged. In this way, control is performed according to the specific needs when driving in and removing steel sheet piles. When driving steel sheet piles, the drill bit is driven by the drill rod to drill the hole in advance, and high-pressure water assists in cutting the rock layer to ensure that the steel sheet piles are smoothly driven into the hard stratum, thereby improving the efficiency of the steel sheet pile driving operation; when the steel sheet piles are removed, grouting is performed synchronously through the nozzle to reduce the disturbance of the surrounding soil caused by the removal of the steel sheet piles. In this way, the needs are effectively met and the construction difficulty during the steel sheet pile operation is effectively reduced. The steel sheet pile support structure described in the present invention can effectively overcome the problem of difficulty in driving steel sheet piles into hard strata such as gravel layers, reduce the disturbance of the surrounding soil caused by the removal of steel sheet piles, and improve the efficiency of steel sheet pile operations.

[0025] In the steel sheet pile support structure described in the present invention, the drill bit and the drill rod are rigidly connected. The drill bit can rotate with the drill rod. The drill bit is connected to the lower part of the steel sheet pile. Under normal circumstances, the drill bit is driven downward together with the steel sheet pile. The tapered structure of the drill bit can reduce the driving resistance. When encountering rock formations, the motor controls the rotation of the drill rod, and the drill bit can rotate along with the drill rod to drill, reducing resistance.

[0026] The steel sheet pile 1 includes an abdominal cavity 2 and a web 8. The web 8 is located at the upper end of the steel sheet pile 1. A plug 9 is provided on one side of the web 8, and a socket 10 is provided on the other side of the web 8. The plug 9 is configured as a protruding structure, and the socket 10 is configured as a recessed structure. The plug 9 is configured as a T-shaped structure, and the socket 10 is configured as a T-shaped structure. With the above structure, when performing steel sheet pile driving operations, multiple steel sheet piles can be connected simultaneously to facilitate synchronous operations. When adjacent steel sheet piles are connected, the plug of one steel sheet pile is engaged with the socket of the adjacent steel sheet pile on one side, and the socket of the steel sheet pile is engaged with the plug of the adjacent steel sheet pile on the other side. In this way, the connection of adjacent steel sheet piles is convenient and reliable, effectively meeting the requirements of steel sheet pile driving construction and avoiding disengagement. In this way, the efficiency of the steel sheet pile driving operation is effectively improved.

[0027] A threaded sleeve 11 is provided near the upper end of the drill rod 3, and a threaded hole 12 is provided near the upper end of the abdominal cavity 2. The drill rod 3 is threadedly mounted through the threaded sleeve 11 and threaded through the threaded hole 12. In this structure, the threaded sleeve and threaded hole are threadedly connected. When the motor drives the drill rod to rotate, the threaded sleeve of the drill rod can rotate relative to the threaded hole, thereby moving the drill bit relative to the steel sheet pile, ultimately achieving penetration of the drill bit.

[0028] The abdominal cavity 2 is a cylindrical structure, connected to the web 8 by an arcuate transition. This structure allows the drill rod to pass through the abdominal cavity and be accommodated within it. This increases the thickness of the steel sheet pile in some areas while reducing it in other areas, meeting installation strength requirements while reducing weight.

[0029] The nozzle 6 is a conical structure. Multiple spray holes 7 are spaced around the drill bit 4 at intervals. Each nozzle hole 7 houses a nozzle 13, which does not protrude from the side of the drill bit 4. The outer end of the nozzle 13 is angled downward. In this structure, the nozzle is mounted outside the nozzle hole and can be connected to the hole using a threaded or snap-on connection. With the nozzle facing downward, it can spray high-pressure water and grouting fluid to assist in soil cutting and to inject grouting fluid. Specifically, when driving a steel sheet pile, the nozzle sprays high-pressure water, while when removing the pile, the nozzle switches to spraying grouting fluid. This meets the different needs of the steel sheet pile in both operating modes.

[0030] The delivery channel 5 is connected to the first port of the tee, the second port of the tee is connected to the high-pressure water supply, and the third port of the tee is connected to the slurry supply. This structure facilitates the switching between high-pressure water and grouting liquid during the driving and removal of steel sheet piles. This effectively meets the different needs of steel sheet piles in both operating modes.

[0031] The present invention also relates to a steel sheet pile support construction method that can effectively overcome the problem of difficulty in driving steel sheet piles into hard strata such as gravel layers, reduce the disturbance to the surrounding soil caused by the removal of steel sheet piles, and improve the efficiency of steel sheet pile operations.

[0032] The construction method is as follows: 1) When driving steel sheet piles, if encountering a hard stratum where it is difficult to drive the steel sheet piles, start the motor, which drives the drill bit to drill through the drill rod, and at the same time, start the high-pressure water supply component to supply high-pressure water to assist sinking; 2) When the steel sheet pile support structure is used and the steel sheet piles are removed, start the slurry supply component to spray slurry to reinforce the soil in the gap after the steel sheet piles are pulled out. Before driving the steel sheet pile 1, first fit the plug 9 of the corresponding steel sheet pile 1 and the socket 10 of the adjacent steel sheet pile 1 into the socket, then fit the socket 10 of the corresponding steel sheet pile 1 and the plug 9 of the adjacent steel sheet pile 1 into the socket, and then apply force to drive the steel sheet pile 1 in. Before driving the steel sheet pile 1, first position and lay out the steel sheet pile 1, determine the position where the steel sheet pile 1 will be driven in, and then fit the corresponding steel sheet pile 1 into the socket.

[0033] The steel sheet pile support structure and construction method described in this invention address shortcomings in existing technology and the specific requirements of steel sheet pile support structures by improving both their structure and methods. During construction, when driving a steel sheet pile into hard ground presents difficulties, the motor is activated, driving the drill bit through the drill rod, while the high-pressure water supply is activated to supply high-pressure water to aid sinking. After the steel sheet pile support structure is in use and the steel sheet pile is removed, the slurry supply is activated to spray slurry, reinforcing the soil in the gap left by the removed steel sheet pile. Before driving the steel sheet pile, the corresponding steel sheet pile's plug is first engaged with the socket of the adjacent steel sheet pile, and then the socket of the corresponding steel sheet pile is engaged with the plug of the adjacent steel sheet pile. The steel sheet pile is then driven in with force. Before driving the steel sheet pile, the steel sheet piles are first positioned and laid out to determine their driving positions, and then the corresponding steel sheet piles are engaged. This allows for control tailored to the specific requirements of steel sheet pile driving and removal. During sheet pile installation, the drill bit is driven by the drill rod to advance the hole, while high-pressure water assists in cutting the rock strata, ensuring smooth penetration of the sheet piles into hard strata and improving the efficiency of the sheet pile installation operation. When the sheet piles are removed, grouting is performed simultaneously through the nozzles to minimize disturbance to the surrounding soil. This effectively meets the requirements and reduces the construction difficulty of sheet pile installation. The steel sheet pile support structure described in this invention can overcome the difficulty of driving steel sheet piles into hard strata such as gravel, reduce the disturbance to the surrounding soil caused by the removal of the steel sheet piles, and improve operation efficiency.

[0034] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A steel sheet pile support structure, characterized by: The invention comprises a steel sheet pile (1), wherein an abdominal cavity (2) capable of penetrating the steel sheet pile (1) is provided on the steel sheet pile (1), a drill rod (3) is movably installed in the abdominal cavity (2), the upper end of the drill rod (3) is connected to a motor, and a drill bit (4) is installed at the lower end of the drill rod (3), the drill bit (4) is an inverted cone structure, a hollow conveying pipe (5) is provided inside the drill rod (3), a nozzle (6) is provided inside the drill bit (4), the nozzle (6) is connected to the conveying channel (5), and a plurality of spray holes (7) connecting the nozzle (6) and the outside of the drill bit (4) are also provided on the drill bit (4); The steel sheet pile (1) comprises an abdominal cavity (2) and a web (8), wherein the web (8) is located at the upper end of the steel sheet pile (1), a plug (9) is provided on one side of the web (8), and a socket (10) is provided on the other side of the web (8); The nozzle (6) is a conical structure, and a plurality of spray holes (7) are provided at intervals along the drill bit (4) around the drill bit (4). A nozzle (13) is installed in each spray hole (7), and the nozzle (13) does not protrude from the side of the drill bit (4). The outer end of the nozzle (13) is provided with a downwardly inclined structure. Before driving the steel sheet pile (1), the plug (9) of the corresponding steel sheet pile (1) and the socket (10) of an adjacent steel sheet pile (1) are clamped and engaged, and then the socket (10) of the corresponding steel sheet pile (1) and the plug (9) of another adjacent steel sheet pile (1) are clamped and engaged, and then the steel sheet pile (1) is driven in with force; A thread sleeve (11) is provided near the upper end of the drill rod (3), a thread hole (12) is provided near the upper end of the abdominal cavity (2), and the drill rod (3) is screwed through the thread sleeve (11) and passed through the thread hole (12); The plug (9) is configured as a protruding structure, the socket (10) is configured as a recessed structure, the plug (9) is configured as a T-shaped structure, and the socket (10) is configured as a T-shaped structure; The abdominal cavity (2) is a cylindrical structure, and the abdominal cavity (2) and the web (8) are connected by an arc transition; Before driving the steel sheet piles, the steel sheet piles are first positioned and laid out to determine the driving position of the steel sheet piles, and then the corresponding steel sheet piles are clamped and bitten; when the steel sheet piles are driven, the drill bit is driven by the drill rod to drill in advance, and high-pressure water is used to assist in cutting the rock layer to ensure that the steel sheet piles are driven into the hard stratum and improve the efficiency of the steel sheet pile driving operation; when the steel sheet piles are pulled out, grouting is carried out synchronously through the nozzle to reduce the disturbance of the steel sheet piles to the surrounding soil.

2. The steel sheet pile supporting structure according to claim 1, characterized in that: The delivery channel (5) is connected to the first pipe opening of the tee, the second pipe opening of the tee is connected to the high-pressure water supply component, and the third pipe opening of the tee is connected to the slurry supply component.

3. The steel sheet pile support construction method of the steel sheet pile support structure according to any one of claims 1 to 2, characterized in that: The construction method is as follows: 1) when driving steel sheet piles, if encountering hard strata where the steel sheet piles are difficult to drive into, the motor is started, and the motor drives the drill bit to drill through the drill rod, and at the same time, the high-pressure water supply component is turned on to supply high-pressure water to assist sinking; 2) when the steel sheet pile support structure is completed and the steel sheet piles are removed, the slurry supply component is turned on to spray slurry to reinforce the soil in the gap after the steel sheet piles are pulled out.

4. The steel sheet pile support construction method according to claim 3, characterized in that: Before driving the steel sheet pile (1), the plug (9) of the corresponding steel sheet pile (1) and the socket (10) of an adjacent steel sheet pile (1) are first clamped and engaged, and then the socket (10) of the corresponding steel sheet pile (1) and the plug (9) of another adjacent steel sheet pile (1) are clamped and engaged, and then the steel sheet pile (1) is driven in with force.

5. The steel sheet pile support construction method according to claim 4, characterized in that: Before driving the steel sheet pile (1), the steel sheet pile (1) is positioned and laid out to determine the driving position of the steel sheet pile (1), and then the corresponding steel sheet pile (1) is clamped and engaged.

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