River-adjacent super-long steel sheet pile extension inserting and driving device and construction method thereof

Abstract

The invention provides a near-river super-long steel sheet pile extension inserting and driving device and a construction method thereof.The near-river super-long steel sheet pile extension inserting and driving device comprises a plurality of steel sheet piles which are detachably arranged, each steel sheet pile comprises a long plate body and a short plate body, the long plate bodies and the short plate bodies of every two adjacent steel sheet piles are arranged in a staggered mode, and the long plate bodies and the short plate bodies are connected through two opposite guiding and positioning units; the two guiding and positioning units are attached to the two sides of the steel sheet pile correspondingly, and end resistance reduction units are further arranged on the guiding and positioning units and used for reducing resistance for inserting and driving of the steel sheet pile. The method ingeniously solves the problems of joint leakage, low positioning efficiency, overlarge end resistance and the like in a traditional process, has the advantages of high joint precision, high construction efficiency, low energy consumption and high environmental protection property, is particularly suitable for deep foundation pit engineering with high water pressure near a river, hard strata and high anti-seepage requirements, and has good economic benefits.

Description

Technical Field

[0001] The invention relates to the field of ship lock and wharf construction, and in particular to a riverside super-long steel sheet pile extension and driving device and a construction method thereof. Background Art

[0002] In deep foundation pit support projects in riverside areas, ultra-long steel sheet piles often face technical bottlenecks such as difficulty in extension construction, insufficient positioning accuracy, and excessive end resistance due to the need to penetrate complex strata (such as gravel layers, hard clay layers, etc.). Traditional steel sheet pile extension processes are mostly to weld the upper and lower steel sheet piles together after the insertion and driving. On-site welding requires an additional work platform, which is difficult to construct, has complicated construction steps, and high labor costs. At present, steel sheet piles are continuously spliced ​​with equal-length piles, resulting in the joints being on the same vertical line, which is prone to form leakage channels and reduce the overall stiffness of the structure. Existing guide devices are mostly independent clamp systems that need to be repeatedly disassembled and installed, with low construction efficiency and difficulty in adapting to the precise positioning of the extended piles.

[0003] Chinese patent document CN 211498825 U records a detachable drag reduction and end expansion device for a steel sheet pile, but the steel sheet pile cannot guarantee the efficiency and quality during extension; Chinese patent document CN 208844543 U records a groutable steel sheet pile that is easy to pull out, but the steel sheet pile has a complex structure, is inconvenient to manufacture, and cannot provide stable insertion stability. It has defects in use and needs to be improved. Summary of the invention

[0004] The invention provides a device for extending and driving super-long steel sheet piles in a river and a construction method thereof, which solves the technical problems of inconvenient steel sheet pile extension, cumbersome operation, and difficulty and high cost in driving construction.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for connecting and inserting super-long steel sheet piles in a river, comprising a plurality of detachable steel sheet piles, the steel sheet piles comprising a long plate body and a short plate body, the long plate body and the short plate body of two adjacent steel sheet piles are staggered respectively, the long plate body and the short plate body are connected by two relative guide positioning units, the two guide positioning units are respectively attached to the two sides of the steel sheet pile, and an end resistance reduction unit is also arranged on the guide positioning unit, which is used to reduce the resistance for the insertion of the steel sheet piles.

[0006] In a preferred solution, the guiding and positioning unit includes two pressing plates, a sealing pad and a guide plate arranged along the height direction, and a docking groove for fixing the ends of the long plate body and the short plate body is formed between the two opposing pressing plates, the sealing pad and the guide plate.

[0007] In a preferred solution, the outer sides of the guide plate, the sealing pad and the pressure plate are respectively provided with downwardly inclined chamfers, and a support plate is provided on the inner side of the guide plate, and the support plate is attached to the side wall of the steel sheet pile.

[0008] In a preferred embodiment, the guiding plate includes a first plate body, and second plate bodies are detachably arranged on both sides of the first plate body. Mounting holes are penetrated through both the first plate body and the second plate bodies, and the end resistance reduction unit is arranged in the mounting holes.

[0009] In a preferred embodiment, a second connecting portion and a first connecting portion are respectively arranged on one side of the first plate body and the second plate body. A first connecting hole and a second connecting hole are respectively penetrated through the first connecting portion and the second connecting portion, and a locking pin is penetrated through the first connecting hole and the second connecting hole.

[0010] In a preferred embodiment, the end resistance reduction unit includes an inner cylinder and an outer cylinder. The length of the outer cylinder is greater than that of the inner cylinder. A butt joint groove is arranged on the inner side of the inner cylinder. The end of the butt joint groove is connected with a conical spiral drill bit through a first round rod. An oval slot is penetrated through the side wall of the inner cylinder. The first round rod is connected with a limiting rod and a telescopic unit, and the limiting rod is located in the oval slot.

[0011] In a preferred embodiment, the telescopic unit includes a driving cylinder and a telescopic rod. The limiting rod is arranged on the telescopic rod. An installation disc is arranged at the end of the telescopic rod. A second round rod is connected to the bottom of the installation disc through a motor. The second round rod is connected with the first round rod through a sealing disc. The conical spiral drill bit is arranged at the bottom of the first round rod. A spiral blade is further arranged on the outer side of the first round rod, and the spiral direction of the spiral blade is opposite to that of the conical spiral drill bit; The sealing disc and the outer cylinder cooperate to form a cleaning chamber, and the telescopic rod and the inner cylinder cooperate to form a sealed chamber.

[0012] In a preferred embodiment, a second locking hole is arranged on the telescopic rod, and the limiting rod is detachably arranged in the second locking hole. A plurality of first locking holes are penetrated through the installation disc in the circumferential direction. A screw is penetrated through the motor and the first locking holes. An output shaft is arranged on the motor. A second external thread is arranged on the output shaft. A second internal thread is arranged at the top of the second round rod, and the spiral direction of the second internal thread is the same as that of the second external thread, and the spiral direction of the second internal thread is opposite to the working rotation direction of the output shaft.

[0013] In a preferred embodiment, a first external thread is arranged on the outer side of the inner cylinder, and a first internal thread is arranged on the inner side of the outer cylinder. The spiral directions of the first external thread and the first internal thread are the same. A first top disc and a second top disc are respectively arranged at the tops of the inner cylinder and the outer cylinder. A first annular groove and a second annular groove are respectively arranged at the bottom of the first top disc and the top of the second top disc. A second mark and the second annular groove are connected to form a buffer groove. A liquid inlet pipe is further arranged at the top of the first top disc, and the liquid inlet pipe is communicated with the first annular groove; A plurality of wedge-shaped rib plates are arranged on the outer side of the outer cylinder in the circumferential direction. A first through hole is penetrated through the second annular groove and the wedge-shaped rib plates. A second through hole is further arranged at the lower side inside the outer cylinder, and the second through hole is communicated with the first through hole; A first mark and a second mark for alignment are further arranged on the inner cylinder and the outer cylinder.

[0014] Construction method of a device for lengthening and inserting long steel sheet piles near a river, comprising the following steps: S1. Weld the guide plate and the pressing plate to the ends of the long plate body and the short plate body respectively to form a prefabricated component; S2. By releasing the connection between one side of the first plate body located on the lower side and the second plate body, rotate the first plate body away from the initial position to form an avoidance position; S3. The pile driver clamps the steel sheet pile from the avoidance position, and fixes the first plate body to the initial position after the insertion is completed; S4. Install a sealing gasket on the top of the guide plate, align the bottom of the steel sheet pile to be lengthened with the docking groove and insert it, and fix it through the pressing plate and the guide positioning unit; S5. After the lengthening is completed, start the tip resistance reduction unit, and use the conical spiral drill bit and the spiral blade to complete the rotary cutting of the soil body, and synchronously sink the steel sheet pile to the design depth; S6. Repeat steps S2 to S5 until the lengthening of all steel sheet piles is completed and a continuous supporting structure is formed.

[0015] The beneficial effects of the present invention are as follows: (1) Innovative structural advantages: Through the staggered splicing design of long and short steel sheet piles, a staggered joint lengthening structure is formed, effectively dispersing the stress concentration at the joint, enhancing the overall flexural stiffness and anti-seepage performance of the supporting wall, and particularly suitable for the structural stability requirements in the dynamic water pressure environment of river engineering.

[0016] The guide positioning module adopts an inverted "L" - shaped lower backing plate structure and a detachable design, enabling the standard steel sheet pile to have a clamping interface by itself. The pile driver can directly realize quick clamping and positioning through the opening and closing of the locking pin, significantly reducing the use of auxiliary tooling and improving the construction efficiency; the pressing plate, the guide plate and the sealing gasket adopt chamfered edges, which not only ensure the splicing tightness but also can compensate for construction errors through elastic deformation.

[0017] (2) Breakthrough in the active control technology of tip resistance The tip resistance reduction unit innovatively adopts an internal spiral drill bit, and drives the spiral drill bit to dynamically cut the soil at the pile tip through a telescopic rod, forming local soil fluidization and significantly reducing the tip resistance. Compared with the traditional pre - drilling process, this technology can achieve "cutting while sinking", avoiding the intervention of secondary processes, and is particularly suitable for continuous insertion operations in hard strata. At the same time, the cutting surfaces formed by the chamfered edges of the pressing plate, the guide plate and the sealing gasket are beneficial to the sinking of the pile tip.

[0018] (3) Comprehensive optimization of the construction method The prefabrication of standard components and the modular construction process (welding the guide plate → opening and closing the first plate body for clamping → press - connecting the sealing gasket → synchronously rotating and cutting the soil body for sinking) form a highly integrated process chain, reducing the on - site welding amount and the frequency of manual adjustment, and greatly improving the lengthening and inserting efficiency of the ultra - long steel sheet pile.

[0019] The synergistic effect of the staggered joint process and the guiding and positioning unit ensures the control of the joint misalignment accuracy during the continuous construction of the support structure, meeting the joint quality control requirements of high-grade anti-seepage projects.

[0020] (4) Economic and environmental benefits The rotary cutting component reduces the number of hammer blows of the pile driver through precise tip resistance reduction, significantly reducing energy consumption and equipment wear; at the same time, it avoids the mud pollution of the traditional slurry wall or high-pressure jet process, conforming to the concept of green construction. Description of the drawings

[0021] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1 It is a construction insertion diagram of the present invention; Figure 2 is Figure 1 the installation diagram of the guiding and positioning unit; Figure 3 It is a schematic diagram of the tip resistance reduction unit of the guiding and positioning unit installation of the present invention; Figure 4 It is a fixing diagram of the guiding and positioning unit of the present invention; Figure 5 It is an opening diagram of the guiding and positioning unit of the present invention; Figure 6 It is the first working state of the tip resistance reduction unit of the present invention; Figure 7 It is the second working state of the tip resistance reduction unit of the present invention; Figure 8 It is the overall schematic diagram of the tip resistance reduction unit of the present invention Figure 1 ; Figure 9 is Figure 8 the bottom diagram; Figure 10 It is the overall schematic diagram of the tip resistance reduction unit of the present invention Figure 2 ; Figure 11 is Figure 8 the internal structure schematic Figure 1 ; Figure 12 is Figure 8 the internal structure schematic Figure 2 ; Figure 13 is Figure 8 the motion state schematic Figure 1 ; Figure 14 is Figure 13 the A-A sectional view; Figure 15 is Figure 8 the motion state schematicFigure 2 ; Figure 16 yes Figure 15 BB section view; Figure 17 yes Figure 8 Schematic diagram of the connection between the telescopic unit and the drive unit Figure 1 ; Figure 18 yes Figure 8 Schematic diagram of the connection between the telescopic unit and the drive unit Figure 2 .

[0022] In the figure: steel sheet pile 1; long plate body 101; short plate body 102; guide positioning unit 2; guide plate 201; sealing pad 202; pressure plate 203; chamfer 204; first plate body 205; second plate body 206; first connecting part 207; second connecting part 208; mounting hole 209; back plate 210; first connecting hole 211; second connecting hole 212; locking pin 213; end resistance reduction unit 3; inner cylinder 301; conical spiral drill bit 302; waist round groove 303; first round rod 304; second round rod 305; spiral blade 306; outer cylinder 307; first top plate 30 8; first annular groove 309; first external thread 310; first mark 311; sealing disk 312; second top disk 313; second annular groove 314; wedge-shaped rib 315; first through hole 316; second through hole 317; first internal thread 318; second mark 319; second internal thread 320; docking groove 4; limiting rod 5; telescopic unit 6; driving cylinder 601; telescopic rod 602; mounting disk 603; first locking hole 604; second locking hole 605; motor 7; output shaft 701; second external thread 702; screw 8; liquid inlet pipe 9; cleaning chamber 10; sealing chamber 11. DETAILED DESCRIPTION

[0023] like Figures 1 - 7 A device for connecting and driving super-long steel sheet piles in a river is disclosed, comprising a plurality of detachable steel sheet piles 1, wherein the steel sheet piles 1 comprise a long plate body 101 and a short plate body 102, wherein the long plate body 101 and the short plate body 102 of two adjacent steel sheet piles 1 are staggered respectively, and the long plate body 101 and the short plate body 102 are connected via two opposite guide positioning units 2, and the two guide positioning units 2 are respectively attached to the two sides of the steel sheet pile 1, and an end resistance reduction unit 3 is further arranged on the guide positioning unit 2, and the end resistance reduction unit 3 is used to reduce the resistance for the driving of the steel sheet pile 1.

[0024] Through the staggered splicing design of long and short steel sheet piles (long on the upper left and short on the lower part, short on the lower right and long on the upper part), a staggered extension structure is formed, so that the joints of the two adjacent steel sheet piles on the left and right are not in the same straight line, which effectively disperses the stress concentration of the joints and improves the overall bending stiffness and anti-seepage performance of the supporting wall. It is especially suitable for the structural stability requirements under the dynamic water pressure environment in riverside projects. The end resistance reduction unit 3 extends from the inside when the steel sheet pile 1 sinks, and performs rotational cutting on the soil to weaken the end resistance.

[0025] In the preferred embodiment, the guiding and positioning unit 2 includes two pressure plates 203, a sealing gasket 202 and a guide plate 201 arranged along the height direction, and a docking groove 4 for fixing the ends of the long plate body 101 and the short plate body 102 is formed between the two opposite pressure plates 203, the sealing gasket 202 and the guide plate 201.

[0026] The two pressure plates 203, the sealing gasket 202 and the guide plate 201 on the lower side cooperate with each other to ensure convenience during installation, wherein the top of the guide plate 201 on the lower side is higher than the top of the steel sheet pile 1 below by a certain distance L1, forming a unified standard part, and cooperating with the sealing gasket 202 to form a joint groove 4, and the pressure plate 203 on the upper side is higher than the bottom of the steel sheet pile 1 above by a certain distance L2, wherein L1 is less than L2, and the difference between L1 and L2 is less than the thickness of the sealing gasket 202, thereby ensuring that when extending, the steel sheet pile 1 on the upper side can be directly placed in the joint groove 4 to complete the docking without the need for external clamps, thereby ensuring simple and fast operation.

[0027] In a preferred solution, the outer sides of the guide plate 201 , the sealing pad 202 and the pressure plate 203 are respectively provided with downwardly inclined chamfers 204 , and the inner side of the guide plate 201 is provided with a support plate 210 , which is attached to the side wall of the steel sheet pile 1 .

[0028] The support plate 210 is provided to increase the contact area with the side wall of the steel sheet pile 1, thereby ensuring the quality of welding. The chamfer 204 ensures that the resistance is smaller during the sinking of the steel sheet pile 1 and the soil is discharged to the outside, thereby ensuring the quality and speed of driving.

[0029] In a preferred embodiment, the guide plate 201 includes a first plate body 205 , and second plates 206 are detachably provided on both sides of the first plate body 205 . Both the first plate body 205 and the second plate body 206 are penetrated by mounting holes 209 , and the end resistance reduction unit 3 is arranged in the mounting holes 209 .

[0030] By opening the first plate body 205 and separating it from the second plate body 206 on one side, it is ensured that the first plate body 205 forms an escape opening after rotating away from the steel sheet pile 1, which is convenient for clamping of the driving machine and is reset after the driving is completed, so that the upper steel sheet pile 1 can continue to be extended.

[0031] In a preferred solution, a second connecting portion 208 and a first connecting portion 207 are respectively arranged on one side of the first plate body 205 and the second plate body 206. A first connecting hole 211 and a second connecting hole 212 are respectively penetrated through the first connecting portion 207 and the second connecting portion 208. A locking pin 213 is penetrated in the first connecting hole 211 and the second connecting hole 212.

[0032] The first connecting portion 207 and the second connecting portion 208 have the same structure. The top surface of the second connecting portion 208 is attached to the bottom surface of the first connecting portion 207. The second connecting portion 208 is not arranged at the fixed end on the other side of the first plate body 205, and a fillet transition method is adopted, thereby avoiding the problem of interference with the steel sheet pile 1 during rotation. The same locking pin 213 method is also adopted for fixation, which is convenient for timely maintenance and replacement.

[0033] As Figures 8 - 18 shown in, in a preferred solution, the tip resistance reduction unit 3 includes an inner cylinder 301 and an outer cylinder 307. The length of the outer cylinder 307 is greater than that of the inner cylinder 301. A docking groove 4 is arranged on the inner side of the inner cylinder 301. The end of the docking groove 4 is connected with a conical spiral drill bit 302 through a first round rod 304. An oval slot 303 is penetrated through the side wall of the inner cylinder 301. The first round rod 304 is connected with a telescopic unit 6 through a limiting rod 5. The limiting rod 5 is located in the oval slot 303.

[0034] Through the operation of the telescopic unit 6, the conical spiral drill bit 302 is driven to work. During the actual working process, the working states of two adjacent telescopic units 6 are opposite, so as to cooperate to form a vibration impact with a stable frequency. Two adjacent telescopic units 6 cooperate with each other. When dealing with the hard rock structure of the soil body, vibration crushing can be carried out, avoiding the difficulty of direct jacking and damage to the surface of the steel sheet pile 1 when encountering the hard rock structure. In addition, two adjacent telescopic units 6 work alternately and backup each other, ensuring the efficiency of soil loosening and improving the time of stable construction.

[0035] In a preferred solution, the telescopic unit 6 includes a driving cylinder 601 and a telescopic rod 602. The limiting rod 5 is arranged on the telescopic rod 602. An installation disc 603 is arranged at the end of the telescopic rod 602. A second round rod 305 is connected to the bottom of the installation disc 603 through a motor 7. The second round rod 305 is connected with a first round rod 304 through a sealing disc 312. The conical spiral drill bit 302 is arranged at the bottom of the first round rod 304. A spiral blade 306 is also arranged on the outer side of the first round rod 304. The spiral blade 306 and the conical spiral drill bit 302 have opposite spiral directions; The sealing disc 312 and the outer cylinder 307 cooperate to form a cleaning bin 10. The telescopic rod 602 and the inner cylinder 301 cooperate to form a sealed bin 11.

[0036] The operation of the telescopic unit 6 drives the sealing disc 312 to discharge the soil that may enter the cleaning bin 10. Inside the sealing bin 11, under the action of the mounting disc 603, the interior is kept clean, preventing the entry of external soil or impurities. The spiral blade 306 and the conical spiral drill bit 302 cooperate to disperse the soil to both sides, avoiding the problem of soil accumulation in the middle. Due to space limitations, while the outer cylinder 307 compresses the soil, the conical spiral drill bit 302 located below has a small volume and limited soil loosening capacity. At this time, the cleaning bin 10 serves as a temporary accommodation space to ensure the soil loosening effect. Then the spiral blade 306 discharges the soil. After the soil is loosened by the conical spiral drill bit 302, there is a clearance space below. At this time, the loosely cut soil is squeezed to the outer periphery to ensure the smoothness of the channel. Repeating this process ensures the stability and high efficiency of the construction.

[0037] In a preferred embodiment, a second locking hole 605 is provided on the telescopic rod 602, and the limiting rod 5 is detachably arranged in the second locking hole 605. A plurality of first locking holes 604 are circumferentially penetrated on the mounting disc 603. The screw 8 passes through the motor 7 and the first locking hole 604. The motor 7 is provided with an output shaft 701, and the output shaft 701 is provided with a second external thread 702. The top of the second round rod 305 is provided with a second internal thread 320. The rotation direction of the second internal thread 320 is the same as that of the second external thread 702, and the rotation direction of the second internal thread 320 is opposite to the working rotation direction of the output shaft 701.

[0038] Through the cooperation of the telescopic rod 602 and the limiting rod 5, the straightness of the second round rod 305 and the first round rod 304 is ensured, with high reciprocating motion precision, avoiding the problem of component damage caused by shaft deviation. At the same time, the outer cylinder 307 seals the waist-shaped groove 303, preventing external soil from entering the inner cylinder 301 through the sealing groove 303. At the same time, when the motor 7 rotates, the second round rod 305 will only become tighter and tighter, avoiding the risk of detachment. The overall installation and disassembly efficiency is high, the effect is good, and the overall sealing performance is ensured.

[0039] In a preferred embodiment, the outer side of the inner cylinder 301 is provided with a first external thread 310, and the inner side of the outer cylinder 307 is provided with a first internal thread 318. The rotation directions of the first external thread 310 and the first internal thread 318 are the same. The tops of the inner cylinder 301 and the outer cylinder 307 are respectively provided with a first top plate 308 and a second top plate 313. The bottom of the first top plate 308 and the top of the second top plate 313 are respectively provided with a first annular groove 309 and a second annular groove 314. The second mark 319 and the second annular groove 314 are connected to form a buffer groove. The top of the first top plate 308 is also provided with a liquid inlet pipe 9, and the liquid inlet pipe 9 communicates with the first annular groove 309; A plurality of wedge-shaped rib plates 315 are circumferentially arranged on the outer side of the outer cylinder 307. The first through hole 316 is disposed through the second annular groove 314 and the wedge-shaped rib plates 315. A second through hole 317 is further provided on the lower side inside the outer cylinder 307, and the second through hole 317 communicates with the first through hole 316. First marks 311 and second marks 319 for alignment are further provided on the inner cylinder 301 and the outer cylinder 307.

[0040] To ensure the installation accuracy, the first marks 311 and the second marks 319 are aligned during each installation to achieve high repeat installation accuracy. In addition, the liquid supply pipe 9 is externally connected to a drag reduction liquid, which can cool the internal structure while moistening the soil and playing a lubricating role at the same time. The drag reduction liquid directly enters the soil through the first through hole 316 and cools the outer cylinder 307 at the same time. The second through hole 317 flushes the second round rod 305 and the sealing disc 312. When the telescopic unit 6 reaches the farthest end, the sealing disc 312 still remains above the second through hole 317, thus avoiding the risk of the drag reduction liquid entering the sealing chamber 11 and preventing damage to the motor 7. The sealing disc is made of a metal material with rapid heat conduction, which can conduct the heat generated by the work of the telescopic unit 6 and the driving unit 7 inside the inner cylinder 301, so as to play a role in maintaining a stable working temperature. In addition, it can also timely spray and flush the soil that may cover the second round rod 307, the spiral blade 306 and the conical spiral drill bit 302, ensuring the working effect of the spiral blade, achieving multiple functions at once, realizing stable soil loosening and drag reduction, and ensuring the insertion and driving efficiency and effect.

[0041] A construction method of a device for connecting and inserting long steel sheet piles near a river includes the following steps: S1. Weld the guide plate 201 and the pressing plate 203 to the ends of the long plate body 101 and the short plate body 102 respectively to form a prefabricated component. S2. By releasing the connection between one side of the first plate body 205 located on the lower side and the second plate body 206, rotate the first plate body 205 away from the initial position to form an avoidance position. S3. The pile driver clamps the steel sheet pile 1 from the avoidance position, and fixes the first plate body 205 to the initial position after the insertion and driving are completed. S4. Install a sealing gasket 202 on the top of the guide plate 201, align the bottom of the steel sheet pile 1 to be connected and inserted into the docking groove 4, and fix it through the pressing plate 203 and the guiding and positioning unit 2. S5. After the connection is completed, start the end resistance reduction unit 3, and complete the rotary cutting of the soil through the conical spiral drill bit 302 and the spiral blade 306, and synchronously sink the steel sheet pile 1 to the designed depth. S6. Repeat steps S2 to S5 until all the steel sheet piles 1 are connected and a continuous support structure is formed.

[0042] By prefabricating the steel sheet pile 1 in the factory to form a standard part, the problem of temporary welding on site is avoided, the welding workload is greatly reduced, the installation accuracy and efficiency are ensured, and different steel sheet pile 1 can be mutually replaced. In addition, the process of staggered joints is adopted to avoid the problem of fault leakage and meet the joint quality control requirements of high-grade anti-seepage projects. The end resistance reduction unit 3 is flexible to adjust, and multiple end resistance reduction units 3 cooperate and divide the work, and can work in multiple modes, all work, part work and part stop (the two parts are in opposite states), or can also work in a continuous progressive manner respectively, so as to ensure high construction efficiency when dealing with hard rock soil of different strengths.

[0043] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A device for connecting and inserting super-long steel sheet piles in a river, characterized by: The invention comprises a plurality of detachably arranged steel sheet piles (1), wherein the steel sheet piles (1) comprise a long plate body (101) and a short plate body (102), wherein the long plate body (101) and the short plate body (102) of two adjacent steel sheet piles (1) are respectively arranged in a staggered manner, and the long plate body (101) and the short plate body (102) are connected via two opposite guide positioning units (2), wherein the two guide positioning units (2) are respectively attached to two sides of the steel sheet pile (1), and an end resistance reduction unit (3) is further arranged on the guide positioning unit (2), and the end resistance reduction unit (3) is used to reduce the resistance when the steel sheet pile (1) is inserted and driven.

2. According to claim 1, the device for extending and inserting super-long steel sheet piles in the riverside is characterized by: The guide positioning unit (2) comprises two pressing plates (203), a sealing pad (202) and a guide plate (201) arranged in a height direction, and a docking groove (4) for fixing the ends of the long plate body (101) and the short plate body (102) is formed between the two opposing pressing plates (203), the sealing pad (202) and the guide plate (201).

3. According to claim 2, the device for extending and inserting super-long steel sheet piles in the river is characterized by: The outer sides of the guide plate (201), the sealing pad (202) and the pressure plate (203) are respectively provided with downwardly inclined chamfers (204), and the inner side of the guide plate (201) is provided with a support plate (210), which is attached to the side wall of the steel sheet pile (1).

4. According to claim 2, the device for extending and inserting riverside super-long steel sheet piles is characterized by: The guide plate (201) comprises a first plate body (205), second plate bodies (206) are detachably provided on both sides of the first plate body (205), mounting holes (209) are provided through the first plate body (205) and the second plate body (206), and the end resistance reduction unit (3) is provided in the mounting hole (209).

5. According to claim 4, the device for extending and inserting super-long steel sheet piles in the river is characterized by: A second connecting portion (208) and a first connecting portion (207) are respectively provided on one side of the first plate body (205) and the second plate body (206); a first connecting hole (211) and a second connecting hole (212) are respectively provided through the first connecting portion (207) and the second connecting portion (208); and a locking pin (213) is inserted into the first connecting hole (211) and the second connecting hole (212).

6. According to claim 1, the device for extending and inserting riverside super-long steel sheet piles is characterized by: The end resistance reduction unit (3) comprises an inner cylinder (301) and an outer cylinder (307); the length of the outer cylinder (307) is greater than that of the inner cylinder (301); a docking groove (4) is provided on the inner side of the inner cylinder (301); the end of the docking groove (4) is connected to a conical spiral drill bit (302) via a first round rod (304); a waist-shaped groove (303) is provided through the side wall of the inner cylinder (301); the first round rod (304) is connected to the telescopic unit (6) via a limiting rod (5); and the limiting rod (5) is located in the waist-shaped groove (303).

7. According to claim 6, the device for extending and inserting super-long steel sheet piles in the riverside is characterized by: The telescopic unit (6) comprises a driving cylinder (601) and a telescopic rod (602); a limiting rod (5) is arranged on the telescopic rod (602); a mounting plate (603) is arranged at the end of the telescopic rod (602); the bottom of the mounting plate (603) is connected to a second round rod (305) via a motor (7); the second round rod (305) is connected to a first round rod (304) via a sealing plate (312); a conical spiral drill bit (302) is arranged at the bottom of the first round rod (304); a spiral blade (306) is further arranged on the outer side of the first round rod (304); the spiral blade (306) and the conical spiral drill bit (302) have opposite rotation directions; The sealing disk (312) and the outer cylinder (307) cooperate to form a cleaning chamber (10), and the telescopic rod (602) and the inner cylinder (301) cooperate to form a sealing chamber (11).

8. According to claim 7, the device for extending and inserting super-long steel sheet piles in the riverside is characterized by: The telescopic rod (602) is provided with a second locking hole (605), the limiting rod (5) is detachably arranged in the second locking hole (605), a plurality of first locking holes (604) are circumferentially arranged on the mounting plate (603), the screws (8) are inserted into the motor (7) and the first locking holes (604), the motor (7) is provided with an output shaft (701), the output shaft (701) is provided with a second external thread (702), the top of the second round rod (305) is provided with a second internal thread (320), the second internal thread (320) and the second external thread (702) have the same rotation direction, and the second internal thread (320) and the working rotation direction of the output shaft (701) are opposite.

9. According to claim 7, the device for extending and inserting riverside super-long steel sheet piles is characterized by: The outer side of the inner cylinder (301) is provided with a first external thread (310), and the inner side of the outer cylinder (307) is provided with a first internal thread (318). The first external thread (310) and the first internal thread (318) have the same rotation direction. The tops of the inner cylinder (301) and the outer cylinder (307) are provided with a first top plate (308) and a second top plate (313) respectively. The bottom of the first top plate (308) and the top of the second top plate (313) are provided with a first annular groove (309) and a second annular groove (314) respectively. The second mark (319) and the second annular groove (314) are connected to form a buffer groove. The top of the first top plate (308) is also provided with a liquid inlet pipe (9), and the liquid inlet pipe (9) and the first annular groove (309) are connected. A plurality of wedge-shaped ribs (315) are arranged on the outer side of the outer cylinder (307) along the circumferential direction, a first through hole (316) is arranged penetrating the second annular groove (314) and the wedge-shaped ribs (315), a second through hole (317) is further arranged on the lower side of the inner part of the outer cylinder (307), and the second through hole (317) and the first through hole (316) are connected; The inner cylinder (301) and the outer cylinder (307) are also provided with a first mark (311) and a second mark (319) for alignment.

10. The construction method of the riverside super-long steel sheet pile extension and insertion device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, welding the guide plate (201) and the pressing plate (203) to the ends of the long plate body (101) and the short plate body (102) respectively to form a prefabricated part; S2, by releasing the connection between one side of the first plate body (205) located at the lower side and the second plate body (206), the first plate body (205) is rotated away from the initial position to form an avoidance position; S3, the driving machine clamps the steel sheet pile (1) from the avoidance position, and after completing the driving, fixes the first plate body (205) to the initial position; S4, installing a sealing gasket (202) on the top of the guide plate (201), aligning the bottom of the steel sheet pile (1) to be extended with the docking groove (4) and inserting it, and fixing it by means of the pressing plate (203) and the guide positioning unit (2); S5, after the lengthening is completed, the end resistance reduction unit (3) is turned on, and the soil is cut by the conical spiral drill bit (302) and the spiral blade (306), and the steel sheet pile (1) is simultaneously sunk to the designed depth; S6. Repeat steps S2 to S5 until all the steel sheet piles (1) are extended and a continuous support structure is formed.

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