A construction method for H-shaped steel closure piles with CO-type locking steel pipe piles for cofferdam

Abstract

The present application discloses a method for constructing H-steel closure piles for a cofferdam using CO-type locking buckle steel pipe piles. The method comprises inserting and driving CT-type steel pipe piles at two connection points at the cofferdam closure position, wherein the C-type locking buckle tubes of the two CT-type steel pipe piles are respectively nested in the O-type locking buckle tubes of the CO-type steel pipe piles on both sides of the cofferdam closure position, and the T-shaped male buckles of the two CT-type steel pipes are arranged relative to each other. The distance between the T-shaped male buckles of the two CT-type steel pipes is then measured, and a closure pile is manufactured based on the measurement data. The closure pile comprises two I-beams and two steel plates. The two steel plates and the two I-beams form a rectangular closed area. A rectangular locking buckle is provided on the side of the webs of the two I-beams facing away from each other, and the length direction of the rectangular locking buckle is consistent with the length direction of the closure pile. The rectangular locking buckles on both sides of the closure pile are then respectively nested in the two T-shaped male buckles at the cofferdam closure position, and the piles are driven downward to complete the cofferdam closure construction. The present application has the effect of facilitating the closure of the cofferdam.

Description

Technical Field

[0001] The present application relates to the field of cofferdam construction, and in particular to a method for constructing H-shaped steel closing piles of a CO-type locking steel pipe pile cofferdam. Background Art

[0002] CO-type locking steel pipe piles are the most commonly used pile type in cofferdam construction. Adjacent steel pipe piles are nested and spliced by C-type locking tubes and O-type locking tubes. A certain number of locking steel pipe piles form a cofferdam structure in the construction river area.

[0003] During cofferdam construction, the number of steel pipe piles required for the construction river area and the driving position of each steel pipe pile are measured and calculated. However, deviations are inevitable in the actual steel pipe pile driving construction. During the cofferdam closing process, the distance between the cofferdam closing positions may be too wide or too narrow. The C-type locking tube and O-type locking tube of the last steel pipe pile at the closing position are difficult to be smoothly nested with the steel pipe pile locking tubes on both sides at the same time. Therefore, there is still room for improvement. Summary of the Invention

[0004] In order to facilitate the closure of steel pipe pile cofferdams, the present application provides a CO-type locking steel pipe pile cofferdam H-steel closure pile construction method.

[0005] The present application provides a CO-type locking steel pipe pile cofferdam H-steel closing pile construction method using the following technical solutions:

[0006] A CO-type locking steel pipe pile cofferdam H-steel closure pile construction method comprises the following steps:

[0007] S1: CT steel pipe pile driving: CT steel pipe piles are driven at the two connection points of the cofferdam closure position. The C-shaped locking tubes of the two CT steel pipe piles are respectively embedded in the O-shaped locking tubes of the CO steel pipe piles on both sides of the cofferdam closure position. The T-shaped male buckles of the two CT steel pipes are arranged opposite each other.

[0008] S2: Closing pile production: Measure the distance between the T-shaped male buckles of the two CT steel pipes, and produce the closing pile based on the measured data. The closing pile consists of two I-beams and two steel plates. The inner sides of the two I-beam webs are arranged facing each other. The steel plates are fully welded and fixed to the outer sides of the flanges of the two I-beams. The steel plates are used to close the gap between the flanges of the two I-beams. The two steel plates and the two I-beams form a rectangular closed area. A rectangular lock buckle is set on the side of the webs of the two I-beams facing away from each other. The length direction of the rectangular lock buckle is consistent with the length direction of the closing pile.

[0009] S3: Insert and drive the closing piles: insert the rectangular lock buckles on both sides of the closing piles into the two T-shaped male buckles at the closing position of the cofferdam, and drive them downwards to complete the cofferdam closing construction.

[0010] By adopting the above technical solution, the C-type locking tube of the CT steel pipe pile is nested with the O-type locking tube of the CO steel pipe pile, leaving a T-type male buckle at the cofferdam closing position, and then by making a closing pile, a rectangular locking buckle is set on the side of the closing pile so that the flange plate of the T-type male buckle can move therein, thereby improving the fault tolerance rate and facilitating the closing of the steel pipe pile cofferdam.

[0011] Preferably, in said S2, the inclined angle between the length direction and the vertical direction of the T-shaped male buckle is measured. When the inclined angle exceeds 4°, a connector is made according to the inclined angle. The connector includes a slot and an I-shaped lock buckle arranged on the outside of the slot. The slot is used to be nested and connected with the T-shaped male buckle. The angle between the T-shaped male buckle and the I-shaped lock buckle is equal to the inclined angle between the length direction and the vertical direction of the T-shaped male buckle. In said S3, before inserting and driving the closing pile, the installation of the connector is completed first, and the connector is nested and matched with the T-shaped male buckle. After the connector is inserted and driven, the I-shaped lock buckles of the two connectors are arranged relative to each other and kept vertical. Then, the rectangular lock buckles on both sides of the closing pile are respectively nested and connected on the two I-shaped lock buckles, and the connector is inserted and driven downward to complete the cofferdam closing construction.

[0012] In actual cofferdam construction, there is a situation where the steel pipe piles are tilted. When the tilt is too large, it will affect the nesting construction of the rectangular lock buckles on both sides of the closing piles. By adopting the above technical solution, connecting parts are added to solve the tilt problem of the T-shaped male buckle, and the closing connection point is transferred to the vertical I-shaped lock buckle to complete the nesting steps of the rectangular lock buckle and the I-shaped lock buckle, which is convenient for the cofferdam closing construction.

[0013] Preferably, the rectangular lock buckle comprises two oppositely arranged channel steels, with a gap between the two channel steels, and the gap is for the T-shaped male buckle to engage.

[0014] By adopting the above technical solution, it is convenient to set the distance between the two channel steels according to the thickness of the T-shaped male buckle, and at the same time, it is convenient to use local materials to complete the production of the rectangular lock buckle.

[0015] Preferably, the steel plate is arranged on the outside of the flange plate of the I-beam.

[0016] By adopting the above technical solution, compared with arranging the steel plate on the inner side of the flange plate, the situation where the web of the I-beam limits the minimum distance between the two I-beams is avoided, which is conducive to improving the adaptability of the closing pile.

[0017] Preferably, the steel plate is fully welded to the flange plate of the I-beam.

[0018] The adoption of the above technical solution is conducive to improving the stability of the closing pile.

[0019] Preferably, the channel steel is welded and fixed to the outer side of the web of the I-beam.

[0020] By adopting the above technical solution, the distance between the rectangular lock buckles formed by the channel steels can be changed by adjusting the relative positions between the I-beams.

[0021] Preferably, reinforcing ribs are provided between the outer side wall of the channel steel and the web of the I-beam.

[0022] The adoption of the above technical solution is beneficial to improving the structural strength of the channel steel.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By making a closing pile and two CT-type steel pipe piles, and setting rectangular lock buckles on the sides of the closing piles, the C-type lock buckle tube of the CT-type steel pipe pile is nested with the O-type lock buckle tube of the CO-type steel pipe pile, leaving a T-type male buckle at the cofferdam closing position. The rectangular lock buckle on the side of the closing pile allows the flange plate of the T-type male buckle to move within it, thereby improving the fault tolerance rate and facilitating the closing of the steel pipe pile cofferdam;

[0025] 2. By making connecting parts to solve the inclination problem of the T-shaped male buckle, the closing connection point is transferred to the vertical I-shaped lock buckle, so as to complete the nesting steps of the rectangular lock buckle and the I-shaped lock buckle, which is convenient for the cofferdam closing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a CT-type steel pipe pile among H-type steel piles used for closing a CO-type locking steel pipe pile cofferdam in an embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of a closing pile in an H-shaped steel pile used for closing a CO-type locking steel pipe pile cofferdam in an embodiment of the present application.

[0028] Figure 3 This is a schematic diagram of the connection of H-shaped steel piles used for closing a CO-type locking steel pipe pile cofferdam in an embodiment of the present application.

[0029] Figure 4 This is a schematic diagram of the positional relationship of the T-shaped male buckles in the H-shaped steel piles used for closing the cofferdam of a CO-type locking steel pipe pile in an embodiment of the present application.

[0030] Figure 5 This is a schematic diagram of the connection between the T-shaped male buckle and the connecting piece in an H-shaped steel pile used for closing a CO-type locking steel pipe pile cofferdam in an embodiment of the present application.

[0031] Explanation of the accompanying symbols: 1. CO-type locking steel pipe pile; 11. O-type locking tube; 2. CT-type steel pipe pile; 21. C-type locking tube; 22. T-type male buckle; 3. Closing pile; 31. I-beam; 311. Web; 312. Flange plate; 32. Steel plate; 4. Rectangular locking buckle; 41. Channel steel; 5. Reinforcing rib; 6. Cofferdam closing position; 7. Connecting piece; 71. Slot; 72. I-shaped locking buckle. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The present application discloses a method for constructing H-shaped steel closure piles of a CO-type locking steel pipe pile cofferdam, comprising the following steps:

[0034] S1: CT type steel pipe pile 2 driving: refer to Figure 1 The cofferdam structure uses CO-type locking steel pipe piles 1 for nested splicing, with space reserved at the cofferdam closing position 6. CT-type steel pipe piles 2 are then driven into the two connection points at the cofferdam closing position 6. The C-type locking tubes 21 of the two CT-type steel pipe piles 2 are respectively nested in the O-type locking tubes 11 of the CO-type steel pipe piles on both sides of the cofferdam closing position 6, and the T-type male buckles 22 of the two CT-type steel pipes are arranged opposite each other.

[0035] S2: Production of closing pile 3: refer to Figure 2 and Figure 3 Measure the distance between the T-shaped male buckles 22 of the two CT steel pipes and the angle between the length direction of the T-shaped male buckles 22 and the vertical direction. Then, make the closing pile 3 based on the measured data. If the angle does not exceed 4 degrees, there is no need to make the connecting piece 7. The T-shaped male buckles 22 serve as the connection points for the closing pile 3.

[0036] Specifically, the closure pile 3 comprises two I-beams 31 and two steel plates 32. The inner sides of the webs 311 of the two I-beams 31 are positioned facing each other. The steel plates 32 are fully welded to the outer sides of the flanges 312 of the two I-beams 31. The steel plates 32 close the gap between the flanges 312 of the two I-beams 31. The two steel plates 32 and the two I-beams 31 form a rectangular enclosed area. Rectangular locking buckles 4 are positioned on the opposite sides of the webs 311 of the two I-beams 31. The length of the rectangular locking buckles 4 is aligned with the length of the closure pile 3. A rectangular locking buckle 4 is positioned on the opposite sides of the webs 311 of the two I-beams 31. The rectangular locking buckles 4 comprise two opposing channel steels 41 welded to the outer sides of the webs 311 of the I-beams 3131. The length of the channel steels 41 is aligned with the length of the closure pile 3. A gap exists between the two channel steels 41, which allows the T-shaped male buckle 22 to engage. The cofferdam is closed by nesting the rectangular lock buckle 4 with the T-shaped male buckle 22. Based on the geometric characteristics of the rectangular lock buckle 4, the T-shaped male buckle 22 has a large movable space inside the rectangular lock buckle 4 and has strong adaptability. The T-shaped male buckle 22 can be smoothly nested inside the rectangular lock buckle 4.

[0037] In addition, a reinforcing rib 5 is provided between the outer side wall of the channel steel 41 and the web 311 of the I-beam 31 , which is beneficial to improving the structural strength of the channel steel 41 .

[0038] Reference Figure 4 and Figure 5 When the angle between the length direction and the vertical direction of the T-shaped male buckle 22 exceeds 4 degrees, the connector 7 is made according to the angle. The connector 7 includes a slot 71 and an I-shaped lock buckle 72 arranged on the outside of the slot 71. The slot 71 is used to nest with the T-shaped male buckle 22. The angle between the T-shaped male buckle 22 and the I-shaped lock buckle 72 is equal to the angle between the length direction and the vertical direction of the T-shaped male buckle 22. Before inserting the closing pile 3, the connector 7 is installed first. The slot 71 of the connector 7 is nested with the T-shaped male buckle 22. After the connector 7 is inserted and driven, the I-shaped lock buckles 72 of the two connectors 7 are arranged relative to each other and remain vertical. The I-shaped lock buckles 72 of the connector 7 serve as connection points for the closing pile 3 to be connected.

[0039] S3: Inserting and driving the closing pile 3: When the angle between the length direction of the T-shaped male buckle 22 and the vertical direction does not exceed 4 degrees, directly embed the rectangular lock buckles 4 on both sides of the closing pile 3 into the two T-shaped male buckles 22 at the cofferdam closing position 6, and insert and drive downward to complete the cofferdam closing construction.

[0040] When the inclined angle between the length direction of the T-shaped male buckle 22 and the vertical direction exceeds 4 degrees, the rectangular lock buckles 4 on both sides of the closing pile 3 are respectively nested and connected to the two I-shaped lock buckles 72, and then driven downward to complete the cofferdam closing construction.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A CO-type locking steel pipe pile cofferdam H-steel closure pile construction method, characterized by: The following steps are involved: S1: CT type steel pipe pile (2) is inserted and driven: CT type steel pipe piles (2) are respectively inserted and driven at two connection points of the cofferdam closing position (6), the C-shaped locking tubes (21) of the two CT type steel pipe piles (2) are respectively nested in the O-shaped locking tubes (11) of the CO type steel pipe piles on both sides of the cofferdam closing position (6), and the T-shaped male buckles (22) of the two CT type steel pipes are arranged opposite to each other; S2: Making a closing pile (3): measuring the distance between the T-shaped male buckles (22) of the two CT-shaped steel pipes, and making a closing pile (3) according to the measured data. The closing pile (3) comprises two I-beams (31) and two steel plates (32). The inner sides of the webs (311) of the two I-beams (31) are arranged opposite to each other. The steel plates (32) are fully welded and fixed to the outer sides of the flange plates (312) of the two I-beams (31). The steel plates (32) are used to close the gap between the flange plates (312) of the two I-beams (31). The two steel plates (32) and the two I-beams (31) enclose a rectangular closed area. A rectangular lock buckle (4) is set on the side of the webs (311) of the two I-beams (31) that are away from each other. The length direction of the rectangular lock buckle (4) is consistent with the length direction of the closing pile (3); S3: Inserting and driving the closing pile (3): inserting the rectangular lock buckles (4) on both sides of the closing pile (3) into the two T-shaped male buckles (22) at the cofferdam closing position (6) respectively, and inserting and driving downward to complete the cofferdam closing construction; In said S2, the inclined angle between the length direction and the vertical direction of the T-shaped male buckle (22) is measured. When the inclined angle exceeds 4 º, a connecting piece (7) is made according to the inclined angle, the connecting piece (7) includes a card slot (71) and an I-shaped lock buckle (72) arranged outside the card slot (71), the card slot (71) is used to be nested and connected with the T-shaped male buckle (22), and the angle between the T-shaped male buckle (22) and the I-shaped lock buckle (72) is equal to the inclined angle between the length direction and the vertical direction of the T-shaped male buckle (22); in the said S3, before inserting and driving the closing pile (3), the installation of the connecting piece (7) is completed first, and the connecting piece (7) and the T-shaped male buckle (22) are nested and matched. After the connecting piece (7) is inserted and driven, the I-shaped lock buckles (72) of the two connecting pieces (7) are relatively arranged and kept vertical, and then the rectangular lock buckles (4) on both sides of the closing pile (3) are respectively nested and connected on the two I-shaped lock buckles (72), and the insertion and driving construction is carried out downward to complete the cofferdam closing construction.

2. The method for constructing H-shaped steel closure piles with CO-type locking steel pipe pile cofferdams according to claim 1 is characterized in that: The rectangular lock buckle (4) comprises two oppositely arranged channel steels (41), with a gap between the two channel steels (41) for the T-shaped male buckle (22) to engage with the gap.

3. The method for constructing H-shaped steel closure piles with CO-type locking steel pipe pile cofferdams according to claim 2 is characterized in that: The steel plate (32) is arranged on the outer side of the flange plate (312) of the I-beam (31).

4. The method for constructing H-shaped steel closure piles with CO-type locking steel pipe pile cofferdams according to claim 3 is characterized in that: The steel plate (32) is fully welded to the flange plate (312) of the I-beam (31).

5. The method for constructing H-steel closure piles with CO-type locking steel pipe pile cofferdams according to claim 4 is characterized in that: The channel steel (41) is welded and fixed to the outside of the web (311) of the I-beam (31).

6. The method for constructing H-shaped steel closure piles with CO-type locking steel pipe pile cofferdams according to claim 5 is characterized in that: A reinforcing rib (5) is provided between the outer side wall of the channel steel (41) and the web (311) of the I-beam (31).

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