Construction technology of main bridge steel casing composite pile foundation and bridge pile foundation

Abstract

The application provides a main bridge steel casing composite pile foundation and a bridge pile foundation construction process, and relates to the technical field of building construction. The main bridge steel casing composite pile foundation comprises a casing main body and a steel reinforcement cage. The casing main body comprises an insertion casing section, a positioning casing section, a shear casing section and a pile cap casing section which are sequentially welded and fixed. The insertion casing section is provided with a cutting edge at an insertion end. The insertion casing section is used for entering a pile foundation hole by using the insertion end. The pile cap casing section comprises an integral annular cylinder and a plurality of ribs. The plurality of ribs are located at one end of the annular cylinder and are arranged at intervals in the circumferential direction of the annular cylinder. Each rib is provided with a positioning groove on both sides in the circumferential direction of the annular cylinder. The positioning groove is used for cooperating with a knocking belt. Each rib can be inclined outward with the end of the rib connected to the annular cylinder as a fulcrum under external force. The steel reinforcement cage is used for being inserted into the casing main body. The pile foundation construction has low difficulty, high construction efficiency and high construction quality.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a composite pile foundation for a main bridge steel casing and a bridge pile foundation construction process. Background Technology

[0002] As a crucial component of bridge engineering, pile foundations have extremely high requirements for seismic performance. They not only effectively transfer the loads of the bridge superstructure to the ground but also resist horizontal loads caused by earthquakes. Currently, bridge pile foundations mainly include reinforced concrete pile foundations, steel-reinforced piles, or reinforced concrete piles with reinforced concrete filling. Reinforced concrete pile foundations are convenient to construct and relatively economical. During the construction of cast-in-place piles, the steel casing should penetrate to a certain depth into the soil or rock layer to prevent grout leakage at the bottom of the casing or collapse of the borehole wall.

[0003] The inventors discovered that existing steel casing pile foundation construction techniques have at least the following drawbacks:

[0004] The process of inserting the steel casing into the pile foundation borehole and then cutting and expanding the ribs is inconvenient. Summary of the Invention

[0005] The purpose of this invention is to provide a construction process for composite pile foundations with steel casings for main bridges and bridge pile foundations, which can improve construction convenience, improve construction quality, and reduce construction costs.

[0006] The embodiments of the present invention are implemented as follows:

[0007] In a first aspect, the present invention provides a composite pile foundation for a main bridge with a steel casing, comprising:

[0008] The casing body comprises an insertion casing section, a positioning casing section, a shear-resistant casing section, and a pile cap casing section, which are sequentially welded and fixed. The insertion section of the insertion casing section has a cutting edge and is used to enter the pile foundation hole using the insertion end. The pile cap casing section comprises an integral annular cylinder and multiple ribs. The multiple ribs are located at one end of the annular cylinder and are spaced apart in the circumferential direction of the annular cylinder. Each rib has a positioning groove on two sides in the circumferential direction of the annular cylinder, which is used to engage with a hammering band. Each rib can tilt outward under external force with the end of the rib connected to the annular cylinder as the fulcrum. The reinforcing cage is used to insert into the casing body.

[0009] In an optional implementation, the two positioning grooves on each rib are at the same height, and the positioning grooves on adjacent ribs are at the same height.

[0010] In an optional embodiment, the positioning groove has two groove sidewalls spaced apart along the length of the rib, and at at least one location in the groove depth direction of the positioning groove, the distance between the two groove sidewalls is greater than the size of the groove opening in the length direction of the rib.

[0011] In an optional embodiment, the cross-sectional profile of the positioning groove is "T" shaped, dovetail shaped, or arc-shaped.

[0012] In an optional embodiment, a plurality of shear rings are provided on the inner wall surface of the shear-resistant casing section, which are spaced apart along the axial direction of the shear-resistant casing section.

[0013] Secondly, the present invention provides a bridge pile foundation construction process applicable to the main bridge steel casing composite pile foundation according to any one of the foregoing embodiments, the construction process comprising:

[0014] Step s100: Divide the support casing into a cut cylindrical section and an annular cylindrical body. Cut the cut cylindrical section into multiple ribs with one end connected to the annular cylindrical body, keeping the multiple ribs as cylindrical structures. Machining positioning grooves on two sides of each rib in the circumferential direction of the support casing, with the positioning grooves of adjacent ribs connected.

[0015] Step s200: Weld and fix the insert casing section, positioning casing section, shear-resistant casing section and annular cylinder in sequence to obtain the casing body;

[0016] Step s300: Insert the main body of the casing into the pile hole, using the inserted casing section as the front end;

[0017] Step s400: Prepare a striking band, which includes multiple force-bearing blocks that are hinged sequentially, and each force-bearing block is equipped with a positioning rod; wrap the striking band around the multiple ribs, and insert the positioning rod on each force-bearing block into a positioning groove that connects adjacent ribs, with each positioning rod extending into the area enclosed by the multiple ribs; lock the force-bearing blocks at both ends of the striking band so that the striking band forms a ring structure;

[0018] Step s500: Prepare a striking sleeve, the striking sleeve including a striking plate and an inner cylinder and an outer cylinder welded to the same surface of the striking plate, the inner cylinder being located within the area enclosed by the outer cylinder; insert the striking sleeve into the multiple ribs, so that the inner cylinder is inserted into the area enclosed by the multiple ribs and abuts against the multiple positioning rods, and the outer cylinder is sleeved outside the area enclosed by the multiple ribs and abuts against the positioning block;

[0019] Step s600: Apply force to the striking sleeve to drive the casing body into the pile foundation borehole;

[0020] Step s700: Place the reinforcing cage into the casing body; remove the striking sleeve and striking band, and bend the multiple ribs outward to form a trumpet-shaped dispersed structure; pour concrete.

[0021] In an optional embodiment, in the step of cutting the cut cylinder segment to form multiple ribs with one end connected to the annular cylinder, the cut cylinder segment is cut using a laser cutting machine.

[0022] In an optional embodiment, in the step of inserting the striking sleeve into the plurality of ribs, the striking plate and the ends of the ribs away from the annular cylinder are spaced apart.

[0023] In an optional embodiment, prior to step s200, a plurality of shear rings arranged at intervals in the axial direction of the shear section are welded into the shear section.

[0024] In an optional embodiment, before the step of placing the reinforcing cage into the casing body, an ultrasonic testing tube is installed inside the casing body to detect the insertion depth of the casing body.

[0025] The beneficial effects of the embodiments of the present invention are:

[0026] In summary, the composite pile foundation with steel casing for the main bridge provided in this embodiment allows for the pre-cutting of a portion of the casing's main body into multiple ribs within the factory before construction. The original shape of the ribs is maintained, ensuring they appear as cylindrical structures to facilitate subsequent insertion of the casing into the pile borehole. After the casing is inserted, multiple ribs are positioned using a hammering tape, and hammering sleeves are then inserted onto these ribs. The hammering sleeves and hammering tape work together to transmit the hammering force. This design eliminates the need for on-site rib cutting after the casing body is inserted, minimizing the impact of the site environment and preventing on-site cutting from compromising the casing's stability, thus improving construction quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the composite pile foundation with steel casing for the main bridge, according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the steel cage structure according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the striking band according to an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional structural diagram of the positioning rod according to an embodiment of the present invention;

[0032] Figure 5 This is a construction schematic diagram of the composite pile foundation with steel casing for the main bridge, according to an embodiment of the present invention.

[0033] icon:

[0034] 100-Casing body; 110-Inserted casing section; 120-Positioning casing section; 130-Shear-resistant casing section; 131-Shear-resistant ring; 140-Pile cap casing section; 141-Annular cylinder; 142-Rib; 143-Positioning groove; 200-Reinforcing cage; 300-Impact strip; 310-Resistant block; 320-Positioning rod; 400-Impact sleeve; 410-Impact plate; 420-Inner cylinder; 430-Outer cylinder. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Currently, during the construction of concrete steel casings, after the pile foundation drilling is completed, the casing is installed into the pile foundation borehole and driven to the set depth using a hammering device. Then, the top portion of the casing is cut into multiple steel strips using a cutting device, which are then dispersed to form a trumpet shape. Because the steel strips are cut only after the casing is positioned, i.e., on-site construction, the operation is inconvenient and can easily affect the positioning quality of the casing.

[0042] In view of this, the designers have provided a composite pile foundation for the main bridge casing, which can reduce the difficulty of operation, is less likely to affect the positioning quality of the casing, is convenient to construct, and has high construction quality.

[0043] Please combine Figures 1-5In this embodiment, the main bridge steel casing composite pile foundation includes a casing body 100 and a reinforcing cage 200. The casing body 100 includes an insertion casing section 110, a positioning casing section 120, a shear-resistant casing section 130, and a pile cap casing section 140, which are sequentially welded and fixed. The insertion section 110 has a cutting edge at the insertion end, and the insertion casing section 110 is used to enter the pile foundation hole using the insertion end. The pile cap casing section 140 includes an integral annular cylinder 141 and multiple ribs 142. Multiple ribs 142 are located at one end of the annular cylinder 141 and are spaced apart in the circumferential direction of the annular cylinder 141. Each rib 142 is provided with a positioning groove 143 on both sides of the annular cylinder 141 in the circumferential direction. The positioning groove 143 is used to engage with the striking band 300. Each rib 142 can tilt outward under external force with the end of the rib 142 connected to the annular cylinder 141 as the fulcrum. The reinforcing cage 200 is used to insert into the casing body 100.

[0044] Based on the above, the working principle of the main bridge steel casing composite pile foundation provided in this embodiment is as follows:

[0045] Before construction, the foundation casing section 140 of the casing body 100 can be cut into multiple ribs 142 within the factory. The original shape of the ribs 142 should be maintained, ensuring they still appear as cylindrical structures to facilitate subsequent insertion of the casing into the pile borehole. After the casing is inserted, the multiple ribs 142 are positioned using a hammering band 300, and then a hammering sleeve 400 is inserted onto each rib 142. The hammering sleeve 400 and hammering band 300 work together to transmit the hammering force. This design eliminates the need for on-site cutting of the ribs 142 after the casing body 100 is inserted, minimizing the impact of the site environment and preventing on-site cutting from compromising the stability of the casing body 100, thus improving construction quality.

[0046] The following embodiments illustrate the detailed structure of the composite pile foundation with steel casing for the main bridge provided in this application.

[0047] In this embodiment, optionally, the two positioning grooves 143 on each rib 142 are at the same height, and the positioning grooves 143 on adjacent ribs 142 are at the same height. In this way, when the positioning and striking belt 300 is used, it is easy to cooperate with the two positioning grooves 143 of the adjacent ribs 142, which makes construction convenient.

[0048] Furthermore, the positioning groove 143 has two groove sidewalls spaced apart along the length of the rib 142. At at least one position in the groove depth direction of the positioning groove 143, the distance between the two groove sidewalls is greater than the size of the groove opening of the positioning groove 143 in the length direction of the rib 142. For example, the cross-sectional profile of the positioning groove 143 is "T" shaped, dovetail shaped, or arc-shaped. With this design, after the positioning groove 143 is engaged with the striking band 300, the striking band 300 will not move in the groove depth direction of the positioning groove 143, that is, in the circumferential direction of the casing body 100, and the position of the striking band 300 is stable and reliable.

[0049] In this embodiment, optionally, a plurality of shear rings 131 are provided on the inner wall surface of the shear-resistant casing section 130, arranged at intervals along the axial direction of the shear-resistant casing section 130. The number of shear rings 131 is set as needed. By setting the shear rings 131, the shear resistance of the shear-resistant casing section 130 can be improved. It should be understood that the shear rings 131 can be metal rings, and the slope between the metal rings and the inner wall surface of the shear-resistant casing section 130 can be an obtuse angle to increase the contact area and ensure that the positioning of the shear rings 131 is firm and reliable.

[0050] The main bridge steel casing composite pile foundation provided in this embodiment is formed by cutting part of the pier cap casing section 140 in the factory to form multiple ribs 142. Compared with cutting after on-site positioning, it is less affected by the construction environment, has lower construction difficulty, and higher construction efficiency.

[0051] This embodiment also provides a bridge pile foundation construction process, applicable to the main bridge steel casing composite pile foundation of the above embodiment. The construction process includes:

[0052] Step s100: Divide the foundation casing into a cut cylindrical section and an annular cylindrical body 141. Cut the cut cylindrical section into multiple ribs 142 connected at one end to the annular cylindrical body 141, keeping the multiple ribs 142 as cylindrical structures. On the two sides of each rib 142 in the circumferential direction of the foundation casing, respectively, a positioning groove 143 is machined, and the positioning grooves 143 of adjacent ribs 142 are connected.

[0053] Step s200: Weld and fix the insert casing section 110, the positioning casing section 120, the shear-resistant casing section 130 and the annular cylinder 141 in sequence to obtain the casing body 100.

[0054] Step s300: Insert the casing body 100 into the pile hole with the casing section 110 as the front end;

[0055] Step s400: Prepare the striking band 300, which includes multiple sequentially hinged force-bearing blocks 310, each force-bearing block 310 being fitted with a positioning rod 320; wrap the striking band 300 around multiple ribs 142, and insert the positioning rod 320 on each force-bearing block 310 into the positioning groove 143 connecting adjacent ribs 142, with each positioning rod 320 extending into the area enclosed by the multiple ribs 142; lock the force-bearing blocks 310 at both ends of the striking band 300 so that the striking band 300 forms a ring structure. In this step, the force-bearing blocks 310 can be arc-shaped blocks with concave arc surfaces, and the concave arc surfaces of multiple force-bearing blocks 310 can form a cylindrical surface, thereby tightly fitting with the multiple ribs 142. Adjacent force-bearing blocks 310 can be hinged by pins. In addition, the two force-bearing blocks 310 located at the ends can be fastened by bolts, thereby fixing the striking band 300 to the cutting cylinder section and improving stability.

[0056] Step s500: Prepare a striking sleeve 400. The striking sleeve 400 includes a striking plate 410 and an inner cylinder 420 and an outer cylinder 430 welded to the same surface of the striking plate 410. The inner cylinder 420 is located in the area enclosed by the outer cylinder 430. The striking sleeve 400 is inserted and fitted with multiple ribs 142, so that the inner cylinder 420 is inserted into the area enclosed by the multiple ribs 142 and abuts against the multiple positioning rods 320, and the outer cylinder 430 is sleeved outside the area enclosed by the multiple ribs 142 and abuts against the positioning block.

[0057] Step s600: Apply force to the striking sleeve 400 to drive the casing body 100 into the pile foundation borehole;

[0058] Step s700: Place the steel cage 200 into the casing body 100; remove the hammering sleeve 400 and hammering band 300, and bend the multiple ribs 142 outward to form a trumpet-shaped dispersed structure; pour concrete.

[0059] In this embodiment, optionally, in the step of cutting the cylindrical segment to form multiple ribs 142 with one end connected to the annular cylinder 141, a laser cutting machine is used to process the cylindrical segment. This design allows the laser cutting machine to perform the cutting operation inside a factory, making it convenient and efficient. Furthermore, the gaps between adjacent ribs 142 after cutting are small, facilitating the maintenance of a cylindrical structure. This allows the striking band 300 and striking sleeve 400 to engage with the multiple ribs 142, facilitating the insertion of the protective cylinder body 100 and striking to the set depth. Simultaneously, the number of ribs 142 can be set as needed during rib processing, simply by equally dividing the cylindrical segment. The positioning grooves 143 on the side of each rib 142 can be pre-processed before cutting the rib 142. For example, holes can be evenly arranged around the circumference of the cutting sleeve on the wall of the cutting section. Then, using the centerline of the hole as the cutting line, the hole is divided into two parts after cutting, i.e., the hole is divided into two adjacent positioning grooves 143. In this way, the processing quality of the positioning grooves 143 is high, which makes it easy to ensure that the positioning grooves 143 of adjacent ribs 142 are at the same height. Furthermore, the centerlines of the positioning grooves 143 all point to the axis of the cutting section. When the positioning rods 320 are inserted into the positioning grooves 143, the positioning rods 320 all point to the axis of the cutting section. The distribution of the positioning rods 320 is reasonable, which does not easily cause interference and facilitates construction.

[0060] Furthermore, in the step of connecting the striking sleeve 400 with the multiple ribs 142, the striking plate 410 and the ends of the ribs 142 away from the annular cylinder 141 are spaced apart. This design avoids interference between the striking plate 410 and the ribs 142, ensuring that the inner cylinder 420 and the outer cylinder 430 can always cooperate with the striking band 300, thereby improving the cooperation quality, making the force transmission more balanced, and improving the construction quality.

[0061] Furthermore, prior to step s200, multiple shear rings 131 arranged at intervals along the axial direction of the shear sleeve section are welded inside the shear sleeve section to improve the structural strength of the shear sleeve section 130.

[0062] Furthermore, before placing the steel cage 200 into the casing body 100, an ultrasonic testing tube is installed inside the casing body 100 to detect the insertion depth of the casing body 100. In this way, the insertion depth of the casing body 100 is controllable, thereby improving the construction quality.

[0063] The bridge pile foundation construction process provided in this embodiment allows for the pre-cutting of a portion of the pier cap section 140 of the casing body 100 into multiple ribs 142 within the factory workshop before construction. The original shape of the ribs 142 is maintained, ensuring they appear as cylindrical structures to facilitate subsequent insertion of the casing into the pile borehole. After the casing is inserted, a hammering band 300 is used to position the multiple ribs 142, and then a hammering sleeve 400 is inserted onto each rib 142. The hammering sleeve 400 and the hammering band 300 work together to transmit the hammering force. This design eliminates the need for on-site cutting of the ribs 142 after the casing body 100 is inserted, minimizing the impact of the site environment and preventing on-site cutting from affecting the stability of the casing body 100, thus improving construction quality.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A composite pile foundation with steel casing for a main bridge, characterized in that, include: The casing body (100) and the reinforcing cage (200) are provided. The casing body (100) includes an insertion casing section (110), a positioning casing section (120), a shear-resistant casing section (130), and a pile cap casing section (140) that are welded and fixed in sequence. The insertion end of the insertion casing section (110) is provided with a cutting edge. The insertion casing section (110) is used to enter the pile foundation hole using the insertion end. The pile cap casing section (140) includes an integral annular cylinder (141) and multiple ribs (142). The multiple ribs (142) are all located in the... One end of the annular cylinder (141) is arranged at intervals in the circumferential direction of the annular cylinder (141). Each of the ribs (142) is provided with a positioning groove (143) on both sides in the circumferential direction of the annular cylinder (141). The positioning groove (143) is used to engage with the striking band (300). Each of the ribs (142) can tilt outward under external force with the end of the rib (142) connected to the annular cylinder (141) as the fulcrum. The steel cage (200) is used to be inserted into the protective cylinder body (100).

2. The composite pile foundation with steel casing for the main bridge according to claim 1, characterized in that: The two positioning grooves (143) on each rib (142) are at the same height, and the positioning grooves (143) on adjacent ribs (142) are at the same height.

3. The composite pile foundation with steel casing for the main bridge according to claim 1, characterized in that: The positioning groove (143) has two groove sidewalls spaced apart along the length of the rib (142). At at least one position along the groove depth of the positioning groove (143), the distance between the two groove sidewalls is greater than the size of the groove opening of the positioning groove (143) along the length of the rib (142).

4. The composite pile foundation with steel casing for the main bridge according to claim 3, characterized in that: The cross-sectional profile of the positioning groove (143) is "T" shaped, dovetail shaped, or arc shaped.

5. The composite pile foundation with steel casing for the main bridge according to claim 1, characterized in that: The inner wall surface of the shear-resistant casing section (130) is provided with a plurality of shear-resistant rings (131) arranged at intervals along the axial direction of the shear-resistant casing section (130).

6. A bridge pile foundation construction technology, characterized in that, The construction process for the composite pile foundation with steel casing for main bridges according to any one of claims 1-5 includes: Step s100: Divide the support casing section into a cut cylindrical section and an annular cylindrical body (141), cut the cut cylindrical section into multiple ribs (142) with one end connected to the annular cylindrical body (141), and keep the multiple ribs (142) as cylindrical structures; respectively process positioning grooves (143) on two sides of each rib (142) in the circumferential direction of the support casing section, and the positioning grooves (143) of adjacent ribs (142) are connected; Step s200: Weld and fix the insert casing section (110), the positioning casing section (120), the shear-resistant casing section (130) and the annular cylinder (141) in sequence to obtain the casing body (100). Step s300: Insert the casing body (100) into the pile hole with the inserted casing section (110) as the front end; Step s400: Prepare a striking band (300), the striking band (300) includes a plurality of force-bearing blocks (310) that are hinged in sequence, and each force-bearing block (310) is equipped with a positioning rod (320); wrap the striking band (300) around the plurality of ribs (142), and insert the positioning rod (320) on each force-bearing block (310) into the positioning groove (143) that connects the adjacent ribs (142), and each positioning rod (320) extends into the area enclosed by the plurality of ribs (142); lock the force-bearing blocks (310) at both ends of the striking band (300) so that the striking band (300) forms a ring structure; Step s500: Prepare a striking sleeve (400), the striking sleeve (400) includes a striking plate (410) and an inner cylinder (420) and an outer cylinder (430) welded to the same surface of the striking plate (410), the inner cylinder (420) is located in the area enclosed by the outer cylinder (430); insert the striking sleeve (400) into the multiple ribs (142), so that the inner cylinder (420) is inserted into the area enclosed by the multiple ribs (142) and abuts against the multiple positioning rods (320), and the outer cylinder (430) is sleeved outside the area enclosed by the multiple ribs (142) and abuts against the force-bearing block; Step s600: Apply force to the striking sleeve (400) to drive the casing body (100) into the pile hole; Step s700: Place the steel cage (200) into the casing body (100); remove the hammer sleeve (400) and hammer band (300), bend the multiple ribs (142) outward to form a trumpet-shaped dispersed structure; pour concrete.

7. The bridge pile foundation construction technology according to claim 6, characterized in that: In the step of cutting the cut cylinder segment to form multiple ribs (142) with one end connected to the annular cylinder (141), the cut cylinder segment is cut using a laser cutting machine.

8. The bridge pile foundation construction technology according to claim 6, characterized in that: In the step of inserting the striking sleeve (400) into the multiple ribs (142), the striking plate (410) and the ends of the ribs (142) away from the annular cylinder (141) are spaced apart.

9. The bridge pile foundation construction technology according to claim 6, characterized in that: Before step s200, multiple shear rings (131) arranged at intervals along the axial direction of the shear casing section are welded inside the shear casing section.

10. The bridge pile foundation construction technology according to claim 6, characterized in that: Before placing the steel cage (200) into the casing body (100), an ultrasonic testing tube is installed inside the casing body (100) to detect the insertion depth of the casing body (100).

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