Wharf split pile cap and construction method thereof

Abstract

The present invention provides a split-type pile cap for a dock and a construction method thereof, comprising a positioning ring arranged on the outer wall of a steel pipe column, a base plate supported on the positioning ring, the base plate being sleeved on the steel pipe column, a connecting key provided inside the base plate, the connecting key being connected to the steel pipe column by aligning a locking unit, four detachable templates provided on the outer side of the base plate, the four templates and the base plate forming a closed space, a superstructure cast in the closed space, and the superstructure and the base plate being connected to form a pile cap. The present invention has a compact structure and, compared with traditional pile caps, has a more guaranteed construction quality than the hanging formwork method, reduces material waste compared with the steel base plate hanging box method, reduces material waste compared with the concrete base plate hanging box method, improves construction efficiency, is less difficult to manufacture, and has good economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic engineering construction, in particular to a wharf split pile cap and a construction method thereof. Background Art

[0002] Currently, in my country's high-pile wharf construction, pile caps are constructed using conventional hanging formwork. This requires construction during low tide in coastal environments, which hinders the quality of steel and concrete. Steel hanging boxes, when used, require steel baseplates, resulting in significant waste of supporting structural materials and low construction efficiency. Precast concrete baseplates are complex and inefficient to manufacture, and bolt holes are prone to misalignment during pouring. Chinese patent document CN 107761663 A describes a sheet pile wharf structure and its construction method. However, this structure is unable to adapt to the position and state of the steel pipe columns during construction, presenting drawbacks that require improvement. Summary of the Invention

[0003] The present invention provides a split-type pile cap for a wharf and a construction method thereof, which solves the problems that a dry construction environment cannot be formed when using a hanging formwork method, the steel bottom plate and the steel hanging box bottom plate are difficult to recycle and cause large material waste when using a steel bottom plate, and the concrete bottom plate prefabrication process has low efficiency and difficult operation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a split pile cap for a dock, including a positioning ring arranged on the outer wall of a steel pipe column, a base plate supported on the positioning ring, the base plate is sleeved on the steel pipe column, a connecting key is provided in the base plate, the connecting key is connected to the steel pipe column by an alignment locking unit, four detachable templates are provided on the outside of the base plate, the four templates and the base plate form a closed space, an upper structure is cast in the closed space, and the upper structure and the base plate are connected to form a pile cap.

[0005] In a preferred solution, the steel pipe column includes a pipe body, a marking line is provided on the outside of the pipe body, a mounting block is fixed on the marking line, an adjusting piece is threadedly connected to the mounting block, and the adjusting piece is used to support the adjustment positioning ring.

[0006] In the preferred solution, the mounting block includes an L-shaped plate, side plates are respectively provided on both sides of the L-shaped plate, a threaded hole is provided on the upper part of the L-shaped plate, the adjustment part includes a threaded column, the threaded column and the threaded hole are threadedly connected, a disc is provided on the upper part of the threaded column, a knob block is provided on the lower part of the threaded column, and the positioning ring is located on the upper side of the disc.

[0007] In the preferred solution, the base plate includes a concrete layer, an avoidance hole is provided in the middle of the concrete layer, the steel pipe column is passed through the avoidance hole, the positioning ring is used to seal the gap between the avoidance hole and the steel pipe column, the connecting key includes a plurality of support plates arranged along the circumference, two connecting holes are provided on the support plate, a bent rod is detachably passed through the connecting hole, one side of the bent rod is connected to the support plate by a nut, and the other side of the bent rod is located in the concrete layer, and a screw is provided on the outer wall of the concrete layer, and the screw is connected to the template by a nut.

[0008] In the preferred solution, at least two mounting holes are provided in parallel along the axial direction on the outer side of the steel pipe column, and the alignment locking unit includes a locking plate, a locking sleeve, a push rod and a slider arranged from top to bottom. A locking rod is provided on one side of the locking plate, and the locking rod matches the mounting hole. A cylindrical head is provided on the other side of the locking plate, and a docking rod is provided at the bottom of the cylindrical head. A docking hole is provided in the docking rod, and a conical head is provided on the top of the push rod, and the conical head is inserted into the docking hole. The locking sleeve is rotatably set on the push rod, and the locking sleeve and the docking rod are threadedly connected. The slider is slid on the connecting key, and the slider is connected to the connecting key through a screw assembly.

[0009] In the preferred scheme, the connecting key includes two annular horizontal plates arranged in parallel, the ends of the annular horizontal plates are connected by annular vertical plates, and multiple groups of fixing parts are circumferentially arranged on the upper annular horizontal plate. The fixing parts include two second fixing plates, a T-slot is provided between the second fixing plates, a second fixing hole is passed through the second fixing plate, a sliding groove is passed through the slider, a limit plate is provided at the bottom of the slider, the limit plate is slid in the T-slot, the screw assemblies are respectively passed through the sliding groove and the second fixing hole, the second fixing plate is connected to the steel pipe column through the locking plate and the slider, a threaded area is provided on the outer side of the top rod, and a limit ring is threadedly connected to the threaded area, a through hole is provided in the locking sleeve, a step is provided in the through hole, and the outer diameter of the limit ring matches the step.

[0010] In the preferred solution, a fixing cover is also provided on the upper part of the steel pipe column, and the fixing cover includes a connecting ring, and an inner ring plate and an outer ring plate are provided at the bottom of the connecting ring, and an annular groove is provided between the inner ring plate and the outer ring plate, and a plurality of through grooves are passed through the outer ring plate, and the width of the through grooves matches the width of the locking plate, the height of the outer ring plate is greater than that of the inner ring plate, and the width of the annular groove matches the thickness of the steel pipe column, and the steel pipe column is inserted in the annular groove, and the fixing cover is connected through the holding plate and the annular cross plate.

[0011] In the preferred solution, a plurality of first limiting members are further provided in the circumferential direction of the upper edge of the annular horizontal plate, the first limiting members include symmetrically arranged third fixing plates, a third gap is provided between the two third fixing plates, a third fixing hole is passed through the third fixing plate, a plurality of second limiting members are provided on the outer side of the outer ring plate, the second limiting members include two parallel first fixing plates, a first gap is provided between the two first fixing plates, a first fixing hole is passed through the first fixing plate, a fourth fixing hole and a waist round hole are respectively provided on both sides of the holding plate, the fourth fixing hole is located on the side close to the fixing cover, and the holding plate is connected to the fixing cover and the connecting key respectively through locking pins.

[0012] In a preferred solution, the positioning ring includes a sealing plate, a support frame is provided on the sealing plate, a rubber layer is provided on the outer side of the support frame, an arc belt is provided on the inner side of the support frame, and a buffer groove is provided on the top of the support frame.

[0013] In a preferred embodiment, a construction method for a split-type pile cap for a dock comprises the following steps:

[0014] S1. Process the connection key and embed it in the base plate template, then complete the base plate prefabrication, process the pile cap template, process the pile head of the steel pipe column, cast the pile core and reserve the height;

[0015] S2. Install the locating ring on the outside of the steel pipe column;

[0016] S3. Hoist the base plate and formwork and adjust their positions accurately;

[0017] S4. Install the alignment locking unit onto the connecting key and the steel pipe column respectively and secure them;

[0018] S5. Install the fixing cover on the steel pipe column and lock it with the connecting key through the holding plate and the locking pin, and then grout the pile head of the steel pipe column until it is flush with the pile head opening;

[0019] S6. Grout the gap between the base plate and the steel pipe column to reach the design strength;

[0020] S7. Pump out water from the enclosed space formed by the base plate, steel pipe columns and formwork to create a dry construction environment;

[0021] S8. Install the steel frame and adjust its position;

[0022] S9, pour pile cap concrete and cure to design strength;

[0023] S10. Remove the formwork and seal the installation holes of the pile cap.

[0024] The beneficial effects of the present invention are as follows: the use of a precast concrete base plate as the base plate for pouring the pile cap ensures better overall bearing capacity, while the use of the formwork side bottom wrapping form means that the pile cap will not have protruding areas in the later stage, making it more beautiful. Connecting keys are installed at the openings of the base plate, replacing the traditional binding of circumferential steel bars, making construction convenient and efficient. The positioning ring can provide support for the base plate, while the base plate can fine-tune the plane position of the pile cap as needed. The alignment locking unit can firmly connect the connecting key to the steel pipe pile, and the fixing cover plays a role in enhancing the fixing effect. The cover itself is locked on the steel pipe column due to gravity, and the connecting key is more stably fixed by the holding plate, thereby ensuring that a firm and rigid whole is formed between the formwork and the steel pipe column, providing protection for subsequent pouring construction, thereby improving the construction efficiency of the pile cap and ensuring the high structural strength of the pile cap. During construction, a dry construction environment is formed inside, which can speed up the overall process and make the operation simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention in state 1;

[0027] Figure 2 This is the overall structural diagram of the present invention in state 2;

[0028] Figure 3 This is the overall structural diagram of the present invention in state three;

[0029] Figure 4 yes Figure 1 Schematic top view of

[0030] Figure 5 yes Figure 1 Schematic bottom view of ;

[0031] Figure 6 yes Figure 1 Schematic diagram of the internal structure;

[0032] Figure 7 yes Figure 1 Schematic diagram of the explosion structure state 1;

[0033] Figure 8 yes Figure 1 Schematic diagram of the explosion structure in state 2;

[0034] Figure 9 yes Figure 1 Schematic diagram of the explosion structure in state three;

[0035] Figure 10 This is a schematic diagram of the connection structure of the connecting key, alignment locking unit and fixed cover of the present invention;

[0036] Figure 11 This is a schematic structural diagram of the alignment locking unit of the present invention, showing state 1;

[0037] Figure 12 This is a schematic structural diagram of the alignment locking unit of the present invention in state 2;

[0038] Figure 13 Schematic diagram of the connecting key structure of the present invention;

[0039] Figure 14 It is a schematic structural diagram of the fixed cover of the present invention;

[0040] Figure 15 It is a schematic diagram of the positioning ring structure of the present invention;

[0041] Figure 16 yes Figure 15 Schematic top view of

[0042] Figure 17 yes Figure 16 AA section view.

[0043] In the figure: base plate 1; concrete layer 101; screw 102; avoidance hole 103; steel pipe column 2; pipe body 201; mounting hole 202; template 3; connecting key 4; annular vertical plate 401; annular horizontal plate 402; support plate 403; connecting hole 404; second fixing plate 405; T-slot 406; second fixing hole 407; third fixing plate 408; third gap 409; third fixing hole 410; alignment locking unit 5; locking plate 501; slider 502; push rod 503; conical head 504; locking sleeve 505; docking rod 506; docking hole 507; cylindrical head 508; locking rod 509; slide groove 510; through hole 511; step 512; limit plate 513; limit ring 514; threaded area 515; mounting block 6; L-shaped plate 601; side plate 602; threaded hole 603; adjusting part 7; threaded column 701; disc 702; knob block 703; positioning ring 8; sealing plate 801; support frame 802; rubber layer 803; arc belt 804; buffer groove 805; nut 9; screw assembly 10; bent rod 11; fixing cover 12; connecting ring 1201; inner ring plate 1202; outer ring plate 1203; annular groove 1204; through groove 1205; first fixing plate 1206; first gap 1207; first fixing hole 1208; holding plate 13; fourth fixing hole 1301; waist hole 1302; locking pin 14; marking line 15; upper structure 16. DETAILED DESCRIPTION

[0044] like Figure 1-10In the invention, a split pile cap for a dock is provided, comprising a positioning ring 8 arranged on the outer wall of a steel pipe column 2, a base plate 1 being supported on the positioning ring 8, the base plate 1 being sleeved on the steel pipe column 2, a connecting key 4 being provided inside the base plate 1, the connecting key 4 being connected to the steel pipe column 2 through an alignment locking unit 5, four detachable formworks 3 being provided on the outer side of the base plate 1, the four formworks 3 and the base plate 1 forming a closed space, an upper structure 16 being cast in the closed space, the upper structure 16 and the base plate 1 being connected to form a pile cap. With this structure, the positioning ring 8 is fixed on the steel pipe column 2 to form a supporting foundation. At the same time, since the outer diameter of the positioning ring 8 is larger than the inner diameter of the inner hole of the base plate 1, the gap between the base plate 1 and the steel pipe column 2 can be sealed, ensuring the relative sealing of the casting space formed by the connection between the base plate 1 and the template 3. The connecting key 4 is arranged in the base plate 1, ensuring that the base plate 1 has good structural strength. At the same time, it serves as a connection basis by aligning the locking unit 5 and the steel pipe column 2 to achieve a firm connection. The upper structure 16 is cast-in-place concrete, which can fill the casting space and connect the connecting key 4, the alignment locking unit 5 and the steel pipe column 2, ensuring the accurate position between the components, and at the same time the force is more balanced and the structure of the pile cap is more stable. The base plate 1 is prefabricated and serves as the base plate for pouring the pile cap, which strengthens the force on the pile cap. The template 3 is installed on the outside of the base plate 1 to form a side-wrapped bottom form. In the later stage, the pile cap will not have any protruding parts, which is more beautiful. The connecting key 4 is used to replace the steel bars around the prefabricated base plate, which makes construction more convenient. The positioning ring 8 can fine-tune the plane position of the pile cap. After the plane position is determined and fixed, it is welded and fixed. A dry construction environment can be formed during the entire construction, which facilitates operation and ensures the quality of pouring.

[0045] In the preferred solution, the steel pipe column 2 includes a pipe body 201, a marking line 15 is provided on the outside of the pipe body 201, a mounting block 6 is fixed on the marking line 15, an adjusting member 7 is threadedly connected to the mounting block 6, and the adjusting member 7 is used to support and adjust the positioning ring 8. With this structure, during the design, the steel pipe column 2 can be pre-scaled using the marking line 15 according to the pouring height and size of the pile cap, providing guidance for the fixation of the mounting block 6. At the same time, it can also ensure that the positions of the multiple mounting blocks 6 on the outside of the steel pipe column 2 are uniform. The adjusting member 7 can be adjusted up and down on the mounting block 6, thereby providing support force for the positioning ring 8. After the base plate 1 is installed on the steel pipe column 2, the positioning ring 8 is squeezed, thereby using the structure of the positioning ring 8 to seal the gap, providing good sealing conditions for the subsequent pouring space.

[0046] In the preferred embodiment, the mounting block 6 includes an L-shaped plate 601, with side plates 602 provided on both sides of the L-shaped plate 601, a threaded hole 603 provided on the upper portion of the L-shaped plate 601, and an adjusting member 7 including a threaded column 701, which is threadedly connected to the threaded hole 603, a disc 702 provided on the upper portion of the threaded column 701, a knob block 703 provided on the lower portion of the threaded column 701, and a positioning ring 8 located on the upper side of the disc 702. With this structure, the top surface of the L-shaped plate 601 is welded and fixed against the marking line 15, the side plates 602 cooperate with the L-shaped plate 601 to ensure stable force, the threaded column 701 can be adjusted on the L-shaped plate 601, and the self-locking thread ensures stable position. By applying torque to the knob block 703 with a wrench, the disc 702 can be fully pressed against the bottom of the positioning ring 8, so that the overall force is balanced and the structure is stable.

[0047] In the preferred embodiment, the base plate 1 includes a concrete layer 101, an avoidance hole 103 is provided in the middle of the concrete layer 101, the steel pipe column 2 is inserted into the avoidance hole 103, and the positioning ring 8 is used to seal the gap between the avoidance hole 103 and the steel pipe column 2. The connecting key 4 includes a plurality of support plates 403 arranged along the circumference, and two connecting holes 404 are provided on the support plate 403. A bent rod 11 is detachably inserted into the connecting hole 404, and one side of the bent rod 11 is connected to the support plate 403 through a nut 9, and the other side of the bent rod 11 is located in the concrete layer 101. The outer wall of the concrete layer 101 is provided with a screw 102, and the screw 102 is connected to the template 3 through a nut 9. With this structure, the diameter of the avoidance hole 103 is slightly larger than the outer diameter of the steel pipe column 2, ensuring that the base plate 1 can smoothly pass through the steel pipe column 2. When the base plate 1 is cast, the connecting key 4 is placed at the avoidance hole 103, and the bent rod 11 plays a pulling role, ensuring the structural stability of the base plate 1, avoiding the problem that the traditional construction of annular steel bars is very difficult to handle and inefficient, and the length of the bent rod 11 can be adjusted as needed, which is easy to use. After the pile cap is cast and maintained, the template 3 can be quickly removed, reducing the overall inconvenience of installation and disassembly.

[0048] like Figure 11-12In the preferred embodiment, at least two mounting holes 202 are provided in parallel along the axial direction on the outer side of the steel pipe column 2, and the alignment locking unit 5 includes a locking plate 501, a locking sleeve 505, a push rod 503 and a slider 502 arranged from top to bottom. A locking rod 509 is provided on one side of the locking plate 501, and the locking rod 509 matches the mounting hole 202. A cylindrical head 508 is provided on the other side of the locking plate 501, and a docking rod 506 is provided at the bottom of the cylindrical head 508. A docking hole 507 is provided in the docking rod 506. A conical head 504 is provided on the top of the push rod 503, and the conical head 504 is inserted in the docking hole 507. The locking sleeve 505 is rotatably set on the push rod 503, and the locking sleeve 505 and the docking rod 506 are threadedly connected. The slider 502 is slidably set on the connecting key 4, and the slider 502 is connected to the connecting key 4 through the screw assembly 10. With this structure, after the base plate 1 and the formwork 3 are hoisted into place, the locking rod 509 on the locking plate 501 is aligned with the mounting hole 202 for quick positioning. At the same time, the two mounting holes 202 avoid the problem of deflection of the locking plate 501 during installation, resulting in reduced installation accuracy. After alignment and fixation, welding is completed, and the slider 502 is installed on the connecting key 4. The height of the positioning ring 8 is adjusted to lift the base plate 1. At this time, the conical head 504 is aligned with the docking hole 507 and inserted, and then the locking sleeve 505 and the docking rod 506 are connected and fixed, ensuring a firm connection between the connecting key 4 and the steel pipe column 2. Therefore, when pouring concrete, the base plate 1 can be pulled by the connecting key 4, and the steel pipe column 2 applies a circumferential pulling force to ensure the pouring accuracy of the pile cap.

[0049] In the preferred embodiment, the connecting key 4 includes two parallel annular horizontal plates 402, the ends of the annular horizontal plates 402 are connected by an annular vertical plate 401, and multiple sets of fixing members are arranged along the circumference of the annular horizontal plate 402 located on the upper side. The fixing members include two second fixing plates 405, a T-shaped groove 406 is provided between the second fixing plates 405, a second fixing hole 407 is penetrated on the second fixing plate 405, a sliding groove 510 is penetrated on the slider 502, and a limit plate is provided at the bottom of the slider 502. 513, the limit plate 513 is slidably arranged in the T-slot 406, the screw assembly 10 is respectively inserted into the slide groove 510 and the second fixing hole 407, the second fixing plate 405 is connected to the steel pipe column 2 through the locking plate 501 and the slider 502, a threaded area 515 is provided on the outer side of the push rod 503, and a limit ring 514 is threadedly connected to the threaded area 515, a through hole 511 is provided in the locking sleeve 505, and a step 512 is provided in the through hole 511, and the outer diameter of the limit ring 514 matches the step 512. With this structure, the annular cross plate 402 ensures the structural strength between the connecting key 4 and the base plate 1. The slider 502 can be adjusted according to the position requirements of the conical head 504, and then the screw assembly 10 locks the slider between the second fixed plate 405. The screw assembly 10 adopts a combination of a screw and a nut. The T-slot 406 ensures that the slider 502 can only move along the radial direction of the connecting key 4, and the limiting effect is good. The limiting ring 514 can adjust the movement and locking range of the locking sleeve 505, and the overall locking effect is better and more flexible to use.

[0050] like Figure 13 In the preferred embodiment, a fixing cover 12 is further provided on the upper part of the steel pipe column 2, and the fixing cover 12 includes a connecting ring 1201, and an inner ring plate 1202 and an outer ring plate 1203 are provided at the bottom of the connecting ring 1201, and an annular groove 1204 is provided between the inner ring plate 1202 and the outer ring plate 1203, and a plurality of through grooves 1205 are passed through the outer ring plate 1203, and the width of the through groove 1205 matches the width of the locking plate 501, and the height of the outer ring plate 1203 is greater than that of the inner ring plate 1202, and the width of the annular groove 1204 matches the thickness of the steel pipe column 2, and the steel pipe column 2 is inserted in the annular groove 1204, and the fixing cover 12 is connected to the annular cross plate 402 through the holding plate 13. With this structure, a height is reserved when the steel pipe column 2 is initially cast, and then the fixing cover 12 is installed. The fixing cover 12 limits the locking plate 501 and applies tension to the connecting key 4 through the holding plate 13. After the fixing cover 12 is installed and adjusted into place, concrete is continued to be cast in the steel pipe column 2, thereby forming a rigidly connected whole between the fixing cover 12, the steel pipe column 2 and the connecting key 4, ensuring the firmness of the internal structure of the pile cap and good casting quality.

[0051] like Figure 14In the preferred embodiment, a plurality of first limiting members are further provided on the annular cross plate 402 along the circumferential direction, the first limiting member includes a symmetrically arranged third fixing plate 408, a third gap 409 is provided between the two third fixing plates 408, and a third fixing hole 410 is passed through the third fixing plate 408, a plurality of second limiting members are provided on the outer side of the outer ring plate 1203, the second limiting member includes two parallel first fixing plates 1206, a first gap 1207 is provided between the two first fixing plates 1206, and a first fixing hole 1208 is passed through the first fixing plate 1206, and a fourth fixing hole 1301 and a waist hole 1302 are respectively provided on both sides of the holding plate 13, the fourth fixing hole 1301 is located on the side close to the fixing cover 12, and the holding plate 13 is connected to the fixing cover 12 and the connecting key 4 respectively through the locking pin 14. With this structure, the holding plate 13 can fix the annular horizontal plate 402 on the upper side of the connecting key 4 on the fixed cover 12, and the position of the fixed cover 12 is coaxial with the steel pipe column 2, so the position of the base plate 1 can be better adjusted to ensure good casting quality. At the same time, the waist-shaped hole 1302 set in the holding plate 3 is convenient for adjustment within a certain range.

[0052] like Figure 15-17 In the preferred embodiment, the positioning ring 8 includes a sealing plate 801, a support frame 802 is provided on the sealing plate 801, a rubber layer 803 is provided on the outer side of the support frame 802, an arc belt 804 is provided on the inner side of the support frame 802, and a buffer groove 805 is provided on the top of the support frame 802. With this structure, when the disc 702 on the adjustment member 7 applies force to the positioning ring 8, the support frame 802 is simultaneously subjected to pressure from the bottom plate 1 and deformed, the rubber layer 803 deforms and fits the bottom of the bottom plate 1, and the support frame 802 tends to deform to both sides, and the arc belt 804 on the inner side fits the outer wall of the steel pipe column 2. The arc shape has a larger overall deformation, a larger contact area with the steel pipe column 2, a tighter overall fit, and a better effect.

[0053] In a preferred embodiment, a construction method for a split-type pile cap for a dock comprises the following steps:

[0054] S1, the connecting key 4 is processed and embedded in the template of the base plate 1, and then the prefabrication of the base plate 1 is completed, the pile cap template 3 is processed, the pile head of the steel pipe column 2 is processed, the pile core is poured and the height is reserved;

[0055] S2. Install the positioning ring 8 to the outside of the steel pipe column 2;

[0056] S3, hoist the base plate 1 and the template 3, and adjust their positions accurately;

[0057] S4, respectively install the alignment locking unit 5 on the connecting key 4 and the steel pipe column 2 and fix them;

[0058] S5. Install the fixing cover 12 onto the steel pipe column 2 and lock it with the connecting key 4 through the holding plate 13 and the locking pin 14. Then, grout the pile head of the steel pipe column 2 until it is flush with the pile head opening.

[0059] S6. Grouting is performed at the gap between the bottom plate 1 and the steel pipe column 2 to reach the design strength;

[0060] S7, pumping water out of the enclosed space formed by the base plate 1, the steel pipe column 2 and the formwork 3 to form a dry construction environment;

[0061] S8. Install the steel frame and adjust its position;

[0062] S9, pour pile cap concrete and cure to design strength;

[0063] S10, removing the template 3 and sealing the installation hole of the pile cap.

[0064] Working Principle: A ring-shaped connecting key is installed at the opening of the base plate to strengthen the load-bearing capacity of the base plate. It replaces the steel bars at this location for binding, avoiding the problem of excessive reinforcement around the opening and conflict between the load-bearing bars and the supporting bars. The base plate is cast using the same side formwork as the opening of the pile cap side formwork to ensure that the opening position is not deviated after the base plate is cast, which is conducive to the formation of a water-stopping environment during the pouring of the pile cap. The pile cap base plate participates in the load-bearing capacity as the permanent structure of the pile cap, reducing material waste. The use of a positioning ring plays a role in temporary positioning and adjustment, speeding up the adjustment of the pile cap and improving overall construction efficiency.

[0065] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A split-type pile cap for a dock, characterized by: The invention comprises a positioning ring (8) arranged on the outer wall of a steel pipe column (2), a bottom plate (1) supported on the positioning ring (8), the bottom plate (1) being sleeved on the steel pipe column (2), a connecting key (4) being provided in the bottom plate (1), the connecting key (4) being connected to the steel pipe column (2) by aligning a locking unit (5), four templates (3) being detachably provided on the outer side of the bottom plate (1), the four templates (3) and the bottom plate (1) forming a closed space, an upper structure (16) being cast in the closed space, and the upper structure (16) and the bottom plate (1) being connected to form a pile cap; The bottom plate (1) includes a concrete layer (101), a middle portion of the concrete layer (101) is provided with an avoidance hole (103), a steel pipe column (2) is inserted into the avoidance hole (103), a positioning ring (8) is used to seal the gap between the avoidance hole (103) and the steel pipe column (2), a connecting key (4) includes a plurality of support plates (403) arranged along the circumference, two connection holes (404) are provided on the support plates (403), a detachable bent rod (11) is inserted into the connection hole (404), one side of the bent rod (11) is connected to the support plate (403) via a nut (9), and the other side of the bent rod (11) is located in the concrete layer (101), an outer wall of the concrete layer (101) is provided with a screw rod (102), and the screw rod (102) is connected to the template (3) via a nut (9); At least two mounting holes (202) are provided in parallel along the axial direction on the outer side of the steel pipe column (2). The alignment locking unit (5) includes a locking plate (501), a locking sleeve (505), a push rod (503) and a slider (502) arranged from top to bottom. A locking rod (509) is provided on one side of the locking plate (501). The locking rod (509) matches the mounting hole (202). A cylindrical head (508) is provided on the other side of the locking plate (501). The bottom of the cylindrical head (508) is provided with a A docking rod (506) is provided with a docking hole (507) in the docking rod (506), a conical head (504) is provided on the top of the top rod (503), the conical head (504) is inserted into the docking hole (507), a locking sleeve (505) is rotatably set on the top rod (503), the locking sleeve (505) and the docking rod (506) are threadedly connected, a slider (502) is slidably set on the connecting key (4), and the slider (502) is connected to the connecting key (4) through a screw assembly (10).

2. The split-type pile cap for a dock according to claim 1, characterized in that: The steel pipe column (2) includes a pipe body (201), a marking line (15) is provided on the outside of the pipe body (201), a mounting block (6) is fixed on the marking line (15), an adjusting member (7) is threadedly connected to the mounting block (6), and the adjusting member (7) is used to support the adjusting positioning ring (8).

3. The split-type pile cap for a dock according to claim 2, characterized in that: The mounting block (6) includes an L-shaped plate (601), side plates (602) are provided on both sides of the L-shaped plate (601), a threaded hole (603) is provided on the upper portion of the L-shaped plate (601), the adjusting member (7) includes a threaded column (701), the threaded column (701) and the threaded hole (603) are threadedly connected, a disc (702) is provided on the upper portion of the threaded column (701), a knob block (703) is provided on the lower portion of the threaded column (701), and a positioning ring (8) is located on the upper side of the disc (702).

4. The split-type pile cap for a dock according to claim 1, characterized in that: The connecting key (4) includes two parallel annular transverse plates (402), the ends of the annular transverse plates (402) are connected by an annular vertical plate (401), and a plurality of sets of fixing members are arranged along the circumferential direction on the annular transverse plate (402) located on the upper side, and the fixing members include two second fixing plates (405), a T-shaped groove (406) is provided between the second fixing plates (405), a second fixing hole (407) is provided through the second fixing plate (405), a sliding groove (510) is provided through the slider (502), and a limiting plate (513) is provided at the bottom of the slider (502), and the limiting plate ( 513) is slidably arranged in the T-slot (406), the screw assembly (10) is respectively inserted into the slide groove (510) and the second fixing hole (407), the second fixing plate (405) is connected to the steel pipe column (2) through the locking plate (501) and the slider (502), the outer side of the top rod (503) is provided with a threaded area (515), the threaded area (515) is threadedly connected to a limit ring (514), a through hole (511) is provided in the locking sleeve (505), a step (512) is provided in the through hole (511), and the outer diameter of the limit ring (514) matches the step (512).

5. The split-type pile cap for a dock according to claim 4, characterized in that: A fixing cover (12) is further provided on the upper portion of the steel pipe column (2), and the fixing cover (12) includes a connecting ring (1201). An inner ring plate (1202) and an outer ring plate (1203) are provided at the bottom of the connecting ring (1201). An annular groove (1204) is provided between the inner ring plate (1202) and the outer ring plate (1203). A plurality of through grooves (1205) are passed through the outer ring plate (1203). The width of the through grooves (1205) matches the width of the locking plate (501). The height of the outer ring plate (1203) is greater than that of the inner ring plate (1202). The width of the annular groove (1204) matches the thickness of the steel pipe column (2). The steel pipe column (2) is inserted into the annular groove (1204). The fixing cover (12) is connected to the annular cross plate (402) via the holding plate (13).

6. The split-type pile cap for a dock according to claim 5, characterized in that: A plurality of first limiting members are also provided on the annular transverse plate (402) along the circumferential direction, the first limiting members include symmetrically arranged third fixing plates (408), a third gap (409) is provided between the two third fixing plates (408), and a third fixing hole (410) is passed through the third fixing plate (408), a plurality of second limiting members are provided on the outer side of the outer ring plate (1203), the second limiting members include two parallel first fixing plates (1206), a first gap (1207) is provided between the two first fixing plates (1206), and a first fixing hole (1208) is passed through the first fixing plate (1206), a fourth fixing hole (1301) and a waist-shaped hole (1302) are provided on both sides of the holding plate (13), the fourth fixing hole (1301) is located on the side close to the fixing cover (12), and the holding plate (13) is connected to the fixing cover (12) and the connecting key (4) respectively through the locking pin (14).

7. The split-type pile cap for a dock according to claim 1, characterized in that: The positioning ring (8) comprises a sealing plate (801), a support frame (802) is provided on the sealing plate (801), a rubber layer (803) is provided on the outer side of the support frame (802), an arc belt (804) is provided on the inner side of the support frame (802), and a buffer groove (805) is provided on the top of the support frame (802).

8. The construction method of a split-type pile cap for a dock according to claim 6, characterized in that: The following steps are involved: S1, processing the connecting key (4) and pre-embedding it in the template of the base plate (1), then completing the prefabrication of the base plate (1), processing the pile cap template (3), processing the pile head of the steel pipe column (2), pouring the pile core and reserving the height; S2, installing the positioning ring (8) on the outside of the steel pipe column (2); S3, hoisting the base plate (1) and the template (3), and accurately adjusting their positions; S4, respectively installing the alignment locking unit (5) on the connecting key (4) and the steel pipe column (2) and fixing them; S5, installing the fixing cover (12) on the steel pipe column (2) and locking it with the connecting key (4) through the holding plate (13) and the locking pin (14), and then grouting the pile head of the steel pipe column (2) until it is flush with the pile head opening; S6. Grouting is performed at the gap between the bottom plate (1) and the steel pipe column (2) to achieve the design strength; S7, pumping water out of the enclosed space formed by the base plate (1), the steel pipe column (2) and the formwork (3) to form a dry construction environment; S8. Install the steel frame and adjust its position; S9, pour pile cap concrete and cure to design strength; S10, remove the template (3) and seal the installation hole of the pile cap.

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