Method and device for sinking precast u-shaped concrete sheet pile into hole

Abstract

The present application relates to the field of building technology, especially to a prefabricated U-shaped concrete pile hole guiding and sinking method and device. The steps are as follows: S1. A lifting hole and a fixing hole are left in the prefabricated pile; the lifting hole is left in the lower third of the pile head of the concrete pile; S2. The center line of the pile row is determined and the center point position of each pile is calibrated; S3. The drill rig is watered and the hole is guided; the drill rod for guiding the hole is as long as the designed length of the concrete pile; the hole guiding range is the length of the concrete pile that can be hammered by the guide frame at one time; S4. The first concrete pile is hammered; the verticality of the concrete pile during the sinking process is manually controlled. The prefabricated U-shaped concrete pile hole guiding and sinking method and device can better control the verticality and the fitting degree of the concrete pile in the construction by increasing the construction process of the drill rig hole guiding, and the construction quality is improved.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a method and apparatus for driving precast U-shaped concrete sheet piles through boreholes. Background Technology

[0002] Reinforced concrete sheet piles have advantages such as high strength, high rigidity, convenient material sourcing, and simple construction. Their shape can be designed and manufactured according to needs, and the tenon and groove structure can solve the problem of waterproofing the joints. The main function of the sheet piles in this project is to prevent slope collapse and seepage.

[0003] For a long time, domestic pile driving was limited to hammer driving, and the capacity of hammer driving equipment was limited, which restricted the size and length of piles, resulting in a sluggish application and development of reinforced concrete sheet piles. With the development of pile driving equipment, and the addition of hydraulic pile driving and vibratory pile driving methods in addition to hammer driving, reinforced concrete sheet piles have a wide range of application prospects.

[0004] Because concrete sheet piles are large and are mostly used in embankments, revetments, and foundation pits, hydraulic vibratory pile drivers are often used in construction. However, these machines have limited power and are difficult to use in soils with high bearing capacity, requiring additional pre-drilling procedures. Existing U-shaped concrete sheet pile construction methods often cause problems with verticality control during pre-drilling, and large gaps can easily form between the sheets, making it difficult to control during construction. Existing guide frames are costly and difficult to use for long-distance concrete sheet pile construction, which seriously affects construction efficiency.

[0005] For example, patent (201610922933.5) discloses a deep-water prestressed concrete U-shaped sheet pile driving process using a guide frame, including the following steps: Step 1: Driving guide piles: GPS positioning is used, and two total stations are used to assist in controlling the axial direction and verticality of the guide piles. After the guide piles sink naturally, the pile driving vessel hammers them down. Step 2: Installing guide beams: After the guide piles have sunk, steel clamps and I-beams are hoisted and installed. The guide frame is adjusted to ensure that the U-shaped sheet piles are vertically inserted into the trench. Then, the planar position of the guide frame is determined. After the verticality of the guide trench opening is correct, the guide piles are spot-welded to the guide frame for fixation. The process is as follows: Step 1: Forming a unified structure; Step 2: Adjusting the guide beam: After the guide beam is fixed, measure the center coordinates of the guide beam frame and check them against the coordinates of the piles to be driven. Then, make detailed adjustments until the requirements are met, and then reinforce the structure; Step 3: Pile driving and positioning: Use guide piles and guide beams to control the overall axis of the U-shaped sheet piles. The axis positioning of the sheet pile construction is divided into two steps. First, the initial positioning is carried out when the guide piles are driven. For U-shaped sheet pile driving, the first positioning pile is extremely important. Its plane position and verticality will directly affect the entire row of sheet piles. GPS positioning is used as the main method, and conventional measurements are used for verification and confirmation; Second, the guide piles are positioned in the first step. The installation line of the guide frame is accurately laid out on the leg. After the guide frame is installed, it is welded and fixed to the corbel. Finally, during the sheet pile driving process, the verticality of the sheet pile is monitored with a total station, and the limit beam roller (4) is pulled by a hand lever (5) for adjustment. Step 5: Pile driving process: ① After confirming that the pile position is accurate, the pile body is self-sinking by its own weight. ② After the pile body stops self-sinking, the pile hammer is used for ballast sinking. ③ After the pile body stops sinking, the hammer is started to drive. In order to prevent the pile slippage, the oil supply of the pile hammer is controlled by the throttle to make it non-continuous hammering. ④ Record the pile driving process. Record the various situations and changes during the pile driving process, including the number of hammer blows, driving time, and pile location number; ⑤ Record the number of hammer blows per meter of pile driving, the total number of hammer blows, the final penetration depth, the pile body depth into the soil, and the depth of the pile tip into the bearing layer; Step 6: Dismantle the guide frame and remove the auxiliary guide pile: Before the guide frame is dismantled and moved forward, a guide pile has been driven in front. The guide frame is then lifted and moved, and the auxiliary guide pile is removed. Then, the pile driving vessel horizontally lifts the guide frame and moves it forward to the next position. This solves the technical problem that the guide frame uses multiple guide piles, making long-distance construction impossible; and does not consider the technical difficulty of construction under poor geological conditions.

[0006] For example, patent (201210162037.5) discloses a method for driving U-shaped prestressed concrete sheet piles using the pre-tensioning method, which includes the following steps: (1) determining the center line of the pile row and marking the center point of each sheet pile; (2) setting up a steel guide frame, which includes a pair of horizontally arranged guide beams for clamping the sheet piles to be driven, a steel bracket fixedly connecting one end of the two guide beams, a pair of guide frame steel supports set on the upper part of the other end of the two guide beams, and a connector connecting the two guide frame steel supports; setting up a pair of temporary support steel piles, with the upper part of the first temporary support steel pile connected to the steel bracket, and the upper part of the second temporary support steel pile connected to the guide frame steel support or connector, so that in the steel guide frame, the upper surface of the guide beam is lower than the pile top elevation and the lower surface of the connector is higher than the pile top elevation; (3) inserting the first sheet pile to be driven into the steel guide frame, aligning it with the marked center point of the first sheet pile, and driving the pile to the set elevation; (4) Insert the next sheet pile into the corresponding position in the steel guide frame. Set a roller device perpendicular to the guide beam on the outside of the sheet pile to be driven. The two ends of the roller device are connected to the fixed position on the guide beam by the positioning sling. Tighten the positioning sling to make the roller device clamp the sheet pile to be driven and carry out the pile driving operation to the set elevation; (5) Repeat step (4). When the steel guide frame cannot accommodate the next sheet pile, loosen the second temporary support steel pile, move the steel guide frame and the first temporary support steel pile to the next work position, so that the other end of the steel guide frame clamps a driven sheet pile through the guide frame steel bracket; (6) Repeat steps (4) and (5) until the pile driving operation is completed. This solves the problem that using a hoist to control will increase the friction in the sheet pile construction and increase the construction difficulty. It takes into account the long-distance construction, but the device is not firm when fixed at one end, and the guide frame is easy to deviate during the pile driving process. It does not consider the technical problem of construction difficulty when the geological conditions are not good.

[0007] For example, patent (201510865492.5) discloses a method for driving precast concrete sheet piles. The method is as follows: (1) a crane is used to vertically lift the sheet pile to the pile position for preliminary positioning, and the sheet pile is inserted into the soil layer by its own weight; (2) a straightening device is used to clamp the sheet pile body, and the verticality is adjusted and the construction axis is aligned; (3) after the alignment is completed, the crane hook is released, the hydraulic impact pile hammer is lifted, and the steel cap at the bottom of the pile hammer head is put into the pile top; (4) after the pile top is put in, the pile driving is carried out. During the driving process, the verticality of the pile is observed at any time, and the tilt of the pile body in all directions is corrected in time by the straightening device to control the sheet pile to maintain vertical pile driving; (5) when the pile top is driven to the predetermined position of the design elevation, the straightening device is released and the pile driving is continued until the pile top is delivered to the design elevation. The elevation is reached; in step (2), the straightening device includes a frame, a base is hinged on the frame, and a clamping arm for clamping the sheet pile is hinged on the base. At least two rollers for contacting and clamping the sheet pile are provided on the clamping arm. The base is hinged to the frame for up-and-down reciprocating rotation adjustment, and the clamping arm is hinged to the base for horizontal reciprocating rotation adjustment. The connection end between the base and the frame and the connection end between the base and the clamping arm are provided with hydraulic cylinders for driving rotation. The surface of the rollers is covered with a buffer layer for contacting the sheet pile and protecting the sheet pile from damage. This solves the problem that using a lifting hydraulic hammer device to improve construction efficiency is not feasible because the lifting hydraulic hammer device cannot provide sufficient construction pressure. Using a straightening device to control the sheet pile construction quality is problematic because the straightening device is too large, which limits the positioning and construction technology of the pile driving machinery.

[0008] To address this issue, we have designed a precast U-shaped concrete sheet pile pre-drilling and driving method and apparatus to provide an alternative technical solution for the aforementioned technical problems. Summary of the Invention

[0009] Therefore, it is necessary to provide a method and apparatus for driving precast U-shaped concrete sheet piles through pre-drilling, in order to solve the technical problems mentioned in the background art.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] A method for driving precast U-shaped concrete sheet piles through pre-drilled holes, comprising the following steps:

[0012] S1. Precast sheet piles shall have hoisting and fixing holes; the hoisting holes shall be located one-third of the way down from the head of the concrete sheet pile.

[0013] S2. Determine the center line of the pile group and mark the center point of each sheet pile;

[0014] S3. Drilling rig water injection pilot hole, using a drill rod of the same length as the concrete sheet pile design, the pilot hole range is the length of concrete sheet pile that can be driven by the guide frame in one operation;

[0015] S4. Drive the first concrete sheet pile. During the pile driving process, the verticality of the concrete sheet pile is manually controlled by a plumb bob.

[0016] S5. Install the steel guide frame. First, install the guide frame and column according to the length of the guide frame. Then, set up the guide channel on the first completed concrete sheet pile and column, adjust the clamps, and connect the column and guide channel.

[0017] S6. Insert the next sheet pile into the corresponding position in the steel guide frame, hoist the concrete sheet pile into the guide groove, fix the position of the concrete sheet pile by the vibratory pile driver, and then drive the sheet pile by clamping the concrete sheet pile to be driven by the vibratory pile driver through the sheet pile clamp.

[0018] S7. Repeat steps S5 and S6 until the guide frame is not long enough. Connect the constructed sheet piles into a whole by passing steel wire ropes through the fixing holes to prevent the last sheet pile from shifting during the next drilling.

[0019] S8. After connection is complete, remove the guide frame and pull out the column;

[0020] S9. The drilling rig uses a drill rod of the same length as the concrete sheet pile design for water injection pilot hole, and the pilot hole range is the length of concrete sheet pile that can be driven by the guide frame in one operation;

[0021] S10. Repeat pile driving until construction is completed.

[0022] In a preferred embodiment of the precast U-shaped concrete sheet pile driving method provided by the present invention, the height of the fixed hole pile head exposed above the soil surface is reserved in step S1 to ensure that the fixed hole is above the soil surface after the pile driving is completed.

[0023] In a preferred embodiment of the precast U-shaped concrete sheet pile driving method provided by the present invention, the fixing hole in the precast concrete sheet pile in step S1 is cut on site after the concrete sheet pile is driven.

[0024] In a preferred embodiment of the precast U-shaped concrete sheet pile pre-drilling and driving method provided by the present invention, the drill rod is provided with one-third of the drill bit and a water injection hole in the middle. The water injection hole is connected to a water supply pipe and a water pump for continuous water injection during the pre-drilling process, which serves as lubrication and cooling.

[0025] A precast U-shaped concrete sheet pile pre-drilling and driving device, used in any of the above, includes a vibratory pile driving machine, one end of which is fixed with a sheet pile clamp, both ends of the bottom of the sheet pile clamp are fixed with steel wire ropes, a concrete sheet pile is provided at the bottom of the steel wire ropes, and a fixing hole is provided inside the concrete sheet pile at one end of the hoisting hole.

[0026] As a preferred embodiment of the precast U-shaped concrete sheet pile pre-drilling and driving device provided by the present invention, it further includes a water pump and a pre-drilling machine. A drill rod is fixed to one end of the pre-drilling machine, and a drill bit is fixed to the bottom of the drill rod. The water pump is located at one end of the pre-drilling machine, and a water delivery pipe is fixed to one end of the water pump. The other end of the water delivery pipe is connected to the drill rod.

[0027] In a preferred embodiment of the precast U-shaped concrete sheet pile pre-drilling and driving device provided by the present invention, the concrete sheet pile is U-shaped.

[0028] In a preferred embodiment of the precast U-shaped concrete sheet pile pre-drilling and driving device provided by the present invention, the concrete sheet pile has a hoisting hole inside, and two steel wire ropes pass through the hoisting hole to connect the concrete sheet pile.

[0029] As a preferred embodiment of the precast U-shaped concrete sheet pile pre-drilling and driving device provided by the present invention, it also includes a hand chain hoist (14), which is located at the bottom of the concrete sheet pile (4).

[0030] As a preferred embodiment of the precast U-shaped concrete sheet pile pre-drilling and driving device provided by the present invention, a guiding component is provided on one side of the concrete sheet pile. The guiding component includes a column and a guide frame, and the guide frame is fixed at one end of the top of the column.

[0031] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0032] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0033] The present invention provides a method and apparatus for driving precast U-shaped concrete sheet piles by drilling, which reduces the resistance during the driving process of concrete sheet piles by adding the construction step of drilling, and can better control the verticality and fit of concrete sheet piles during construction, thereby improving the construction quality.

[0034] The drill rod is set with only one-third of the drill bit, and a water injection hole is set in the middle. The water injection hole is connected to a water pipe and a water pump. Water is continuously injected during the drilling process, which serves to lubricate and cool the drill bit. When the drill bit is pulled out by rotating in the opposite direction, only a small amount of soil is brought out. During the construction of concrete sheet piles, the lower moist soil is squeezed to fill the drill hole. Without increasing the consumption of additional materials, the construction difficulty is reduced and the construction efficiency and quality are improved.

[0035] By reserving fixing holes during the concrete sheet pile construction, the sheet piles within the range that the guide frame can construct are connected into a whole by steel wire ropes before the next drilling operation is carried out. This ensures that the drilling will not create gaps in the completed sheet piles or cause them to tilt, thus reducing the impact of the drilling on the completed concrete sheet piles.

[0036] The concrete sheet piles are lifted into place through the lifting holes, reducing material loss caused by the pile driver clamps crushing the pile heads during lateral transportation. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the process of the present invention.

[0039] Figure 2 This is a schematic diagram of the hoisting of the U-shaped concrete sheet pile of the present invention;

[0040] Figure 3 This is a schematic diagram of the drilling rig pilot hole for the present invention;

[0041] Figure 4 This is a schematic diagram of the concrete sheet pile of the present invention;

[0042] Figure 5 This is a schematic diagram of the guide frame-assisted pile driving of the present invention;

[0043] Figure 6 This is a schematic diagram of the completed sheet pile with wire rope connection according to the present invention.

[0044] In the diagram: 1. Drill rod; 2. Drill bit; 3. Water pump; 4. Concrete sheet pile; 5. Fixing hole; 6. Lifting hole; 7. Wire rope; 8. Sheet pile clamp; 9. Vibratory pile driver; 10. Pre-drilling machine; 11. Column; 12. Guide frame; 13. Water pipe; 14. Hand chain hoist. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0047] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0048] 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.

[0049] Example 1

[0050] A method for driving precast U-shaped concrete sheet piles through pre-drilling includes the following steps:

[0051] S1. The precast sheet piles shall have hoisting holes 6 and fixing holes 5. The hoisting holes 6 shall be located one-third of the way down from the head of the concrete sheet pile 4. The fixing holes 5 shall be located according to the design height of the pile head above the soil surface, ensuring that the fixing holes 5 are above the soil surface after the pile driving is completed.

[0052] The fixing hole 5 of the precast concrete sheet pile 4 can be cut on site after the concrete sheet pile 4 is driven.

[0053] S2. Determine the center line of the pile group and mark the center point of each sheet pile;

[0054] S3. Drilling rig water injection pilot hole, using drill rod 1 with the same design length as concrete sheet pile 4, the pilot hole range is the length of concrete sheet pile 4 that can be driven in one go by guide frame 12;

[0055] S4. The first concrete sheet pile 4 is driven using the traditional method. During the pile driving process, the verticality of the concrete sheet pile 4 is manually controlled by a plumb bob.

[0056] S5. Install the steel guide frame 12. First, install the guide frame 12 and column 11 according to the length of the guide frame 12. Then, set up the guide channel on the first completed concrete sheet pile 4 and column 11. Adjust the clamp and connect the column 11 and the guide channel.

[0057] S6. Insert the next sheet pile into the corresponding position in the steel guide frame 12, hoist the concrete sheet pile 4 into the guide groove, fix the position of the concrete sheet pile 4 by the vibratory pile driving machine 9, so that the vibratory pile driving machine 9 can clamp the concrete sheet pile 4 to be driven by the sheet pile clamp 8 and then drive the sheet pile.

[0058] S7. Repeat until the guide frame 12 is not long enough, then connect the constructed sheet piles into a whole by passing the steel wire rope 7 through the fixing hole 5 to prevent the last sheet pile from shifting during the next drilling.

[0059] S8. After connection is complete, remove the guide frame 12 and pull out the column 11;

[0060] S9. The drilling rig uses a drill rod 1 with the same design length as the concrete sheet pile 4 for water injection. The drilling range is the length of the concrete sheet pile 4 that can be driven in one go by the guide frame 12.

[0061] S10. Repeat pile driving until construction is completed.

[0062] Preferably, drill rod 1 is equipped with only one-third of drill bit 2, with a water injection hole in the middle. The water injection hole is connected to water supply pipe 13 and water pump 3. Water is continuously injected during the drilling process to lubricate and cool the drill bit. When drill bit 2 is pulled out by rotating in the opposite direction, it only brings out a small amount of soil. When the concrete sheet pile 4 is constructed, the lower moist soil is squeezed to fill the borehole. Without increasing the consumption of additional materials, the construction difficulty is reduced and the construction efficiency and quality are improved.

[0063] This embodiment provides a precast U-shaped concrete sheet pile pre-drilling and driving method. During use, a hoisting hole 6 and a fixing hole 5 are left on the precast sheet pile. The hoisting hole 6 is located one-third of the way down from the head of the concrete sheet pile 4. The fixing hole 5 is located according to the designed height of the pile head above the soil surface, ensuring that the fixing hole 5 is above the soil surface after pile driving. Then, the center line of the pile row is determined and the center point of each sheet pile is marked. Water is injected through a drilling rig to create a pre-drilling hole, using a drill rod 1 of the same design length as the concrete sheet pile 4. The pre-drilling range is the length of the concrete sheet pile 4 that can be driven in one pass by the guide frame 12. The first concrete sheet pile 4 is then driven using a traditional method. During the driving process, the verticality of the concrete sheet pile 4 is manually controlled by a plumb bob. Then, the steel guide frame 12 is installed. The guide frame 12 and column 11 are first driven according to their length. The guide groove is then placed on the completed first concrete sheet pile 4 and column 11. The clamping plates are adjusted, and the column 11 and guide groove are connected.

[0064] Then, the next sheet pile is inserted into the corresponding position in the steel guide frame 12, and the concrete sheet pile 4 is hoisted into the guide groove. The position of the concrete sheet pile 4 is fixed by the vibratory pile driver 9, so that the vibratory pile driver 9 clamps the concrete sheet pile 4 to be driven by the sheet pile clamp 8 and then drives the sheet pile. Repeat until the length of the guide frame 12 is insufficient, and connect the constructed sheet piles into a whole by passing the steel wire rope 7 through the fixing hole 5 to prevent the last sheet pile from shifting during the next drilling. After the connection is completed, remove the guide frame 12 and pull out the column 11. Drill water to drill the hole, and use the drill rod 1 with the same design length as the concrete sheet pile 4 to drill the hole. The drilling range is the length of the concrete sheet pile 4 that can be driven by the guide frame 12 at one time. Repeat the pile driving until the construction is completed.

[0065] Example 2

[0066] The apparatus is disclosed based on the above-described embodiment one;

[0067] A precast U-shaped concrete sheet pile pre-drilling and driving device includes a vibratory pile driver 9. One end of the vibratory pile driver 9 is fixed with a sheet pile clamp 8. Both ends of the bottom of the sheet pile clamp 8 are fixed with steel wire ropes 7. A concrete sheet pile 4 is set at the bottom of the steel wire ropes 7. The concrete sheet pile 4 is U-shaped. A lifting hole 6 is opened inside the concrete sheet pile 4. The steel wire ropes 7 pass through the lifting hole 6 and connect to the concrete sheet pile 4. The height of the concrete sheet pile 4 can be controlled by the vibratory pile driver 9 after passing through the lifting hole 6 with two steel wire ropes 7. A fixing hole 5 is opened inside the concrete sheet pile 4 at one end of the lifting hole 6. The position of the concrete sheet pile 4 can be fixed by passing through the fixing hole 5 with two steel wire ropes 7.

[0068] It also includes a hand chain hoist 14, which is located at the bottom of the concrete sheet pile 4 and can be used to tighten and fix the wire rope 7.

[0069] A guide assembly is provided on one side of the concrete sheet pile 4. The guide assembly includes a column 11 and a guide frame 12. The guide frame 12 is fixed to one end of the top of the column 11, so that the column 11 can be installed inside the soil surface and the position of the guide frame 12 is supported and fixed by the column 11.

[0070] In this embodiment, a precast U-shaped concrete sheet pile pre-drilling and driving device is used. During operation, the concrete sheet pile 4 has a hoisting hole 6 and a fixing hole 5; the center line of the pile row is determined and the center point of each sheet pile is marked; the first concrete sheet pile 4 is driven using a traditional method; a pre-drilling rig is used to drill a hole, the drilling range of which is the length of the concrete sheet pile 4 that can be driven in one pass using the guide frame 12; the guide frame 12 column 11 is driven; the steel guide frame 12 is installed; the next sheet pile is inserted into the corresponding position within the steel guide frame 12; and the concrete sheet pile 4 is hoisted into the guide groove. The position of the concrete sheet pile 4 is fixed by the vibratory pile driver 9, so that the vibratory pile driver 9 can clamp the concrete sheet pile 4 to be driven by the sheet pile clamp 8 and then drive the sheet pile. If the length of the guide frame 12 is insufficient, the already constructed sheet piles are connected into a whole by passing the steel wire rope 7 through the fixing hole 5 to prevent the last sheet pile from shifting during the next drilling. After the connection is completed, the guide frame 12 is removed and the column 11 is pulled out. The drilling machine drills the hole, and the drilling range is the length of the concrete sheet pile 4 that can be driven by the guide frame 12 in one go. Repeat until the construction is completed.

[0071] Example 3

[0072] Unlike Embodiment 2, a precast U-shaped concrete sheet pile pre-drilling and driving device includes a water pump 3 and a pre-drilling machine 10. One end of the pre-drilling machine 10 is fixed with a drill rod 1, and the bottom of the drill rod 1 is fixed with a drill bit 2. The water pump 3 is located at one end of the pre-drilling machine 10, and one end of the water pump 3 is fixed with a water supply pipe 13. The other end of the water supply pipe 13 is connected to the drill rod 1, so that the water inside the water pump 3 can be transported to the outside of the drill rod 1 through the water supply pipe 13.

[0073] This embodiment provides a precast U-shaped concrete sheet pile pre-drilling and driving device. Through the water injection hole set in the middle of the drill rod 1 and the water injection hole connected to the water supply pipe 13, water is continuously delivered to the drill rod 1 through the water supply pump 3 and the water supply pipe 13 during the drilling process, which plays a role in lubrication and cooling. When the drill bit 2 is pulled out in the reverse rotation, it only brings out a small amount of soil. When the concrete sheet pile 4 is constructed, the lower moist soil is squeezed to fill the drill hole. Without increasing the additional material consumption, the construction difficulty is reduced and the construction efficiency and construction quality are improved.

[0074] When the device is in use, hoisting holes 6 and fixing holes 5 are left on the precast sheet piles. The hoisting hole 6 is left at one-third of the length of the concrete sheet pile 4 below the pile head. The fixing hole 5 is left according to the design height of the pile head above the soil surface to ensure that the fixing hole 5 is above the soil surface after the pile is driven. Then, the center line of the pile row is determined and the center point of each sheet pile is marked. The drilling rig is used to inject water to guide the hole. The drill rod 1 with the same design length as the concrete sheet pile 4 is used to guide the hole. The guiding hole range is the length of the concrete sheet pile 4 that can be driven by the guide frame 12 at one time. Then, the first concrete sheet pile 4 is driven in the traditional way. During the pile driving process, the verticality of the concrete sheet pile 4 is manually controlled by the plumb bob. Then, the steel guide frame 12 is installed. The guide frame 12 and the column 11 are driven according to the length of the guide frame 12. The guide groove is set on the completed first concrete sheet pile 4 and the column 11. The clamp is adjusted and the column 11 is connected to the guide groove.

[0075] Then, the next sheet pile is inserted into the corresponding position in the steel guide frame 12, and the concrete sheet pile 4 is hoisted into the guide groove. The position of the concrete sheet pile 4 is fixed by the vibratory pile driver 9, so that the vibratory pile driver 9 clamps the concrete sheet pile 4 to be driven by the sheet pile clamp 8 and then drives the sheet pile. Repeat until the length of the guide frame 12 is insufficient, and connect the constructed sheet piles into a whole by passing the steel wire rope 7 through the fixing hole 5 to prevent the last sheet pile from shifting during the next drilling. After the connection is completed, remove the guide frame 12 and pull out the column 11. Drill water to drill the hole, and use the drill rod 1 with the same design length as the concrete sheet pile 4 to drill the hole. The drilling range is the length of the concrete sheet pile 4 that can be driven by the guide frame 12 at one time. Repeat the pile driving until the construction is completed.

[0076] The following is the usage process of the precast U-shaped concrete sheet pile pre-drilling and driving method and device provided by the present invention:

[0077] During use, the concrete sheet pile 4 is equipped with a hoisting hole 6 and a fixing hole 5; the center line of the pile row is determined and the center point of each sheet pile is marked; the first concrete sheet pile 4 is driven using the traditional method; the drilling rig is used to drill a pilot hole, the pilot hole range being the length of the concrete sheet pile 4 that can be driven in one go by the guide frame 12; the guide frame 12 column 11 is driven; the steel guide frame 12 is installed; the next sheet pile is inserted into the corresponding position in the steel guide frame 12, the concrete sheet pile 4 is hoisted into the guide groove, and the position of the concrete sheet pile 4 is fixed by the vibratory pile driver 9, so that the vibratory pile driver 9 clamps the concrete sheet pile 4 to be driven by the sheet pile clamp 8 and then drives the sheet pile; if the length of the guide frame 12 is insufficient, the already constructed sheet piles are connected into a whole by passing the steel wire rope 7 through the fixing hole 5 to prevent the last sheet pile from shifting during the next pilot hole; after the connection is completed, the guide frame 12 is removed and the column 11 is pulled out; the drilling rig is used to drill a pilot hole, the pilot hole range being the length of the concrete sheet pile 4 that can be driven in one go by the guide frame 12; this process is repeated until the construction is completed.

[0078] Meanwhile, through the water injection hole set in the middle of the drill rod 1 and the water supply pipe 13 connected to the water injection hole, water is continuously delivered to the drill rod 1 through the water supply pump 3 and the water supply pipe 13 during the drilling process, which plays a role in lubrication and cooling. When the drill bit 2 is pulled out in the reverse rotation, only a small amount of soil is brought out. When the concrete sheet pile 4 is constructed, the lower moist soil is squeezed to fill the drill hole. Without increasing the consumption of additional materials, the construction difficulty is reduced and the construction efficiency and construction quality are improved.

[0079] During use, hoisting holes 6 and fixing holes 5 are left on the precast sheet piles. The hoisting hole 6 is left at one-third of the length of the concrete sheet pile 4 below the pile head. The fixing hole 5 is left according to the designed height of the pile head above the soil surface to ensure that the fixing hole 5 is above the soil surface after the pile is driven. Then, the center line of the pile row is determined and the center point of each sheet pile is marked. The drilling rig is used to inject water to guide the hole. The drill rod 1 with the same design length as the concrete sheet pile 4 is used to guide the hole. The guiding hole range is the length of the concrete sheet pile 4 that can be driven by the guide frame 12 at one time. Then, the first concrete sheet pile 4 is driven in the traditional way. During the pile driving process, the verticality of the concrete sheet pile 4 is manually controlled by the plumb bob. Then, the steel guide frame 12 is installed. The guide frame 12 and the column 11 are driven according to the length of the guide frame 12. The guide groove is set on the completed first concrete sheet pile 4 and the column 11. The clamp is adjusted and the column 11 is connected to the guide groove.

[0080] Then, the next sheet pile is inserted into the corresponding position in the steel guide frame 12, and the concrete sheet pile 4 is hoisted into the guide groove. The position of the concrete sheet pile 4 is fixed by the vibratory pile driver 9, so that the vibratory pile driver 9 clamps the concrete sheet pile 4 to be driven by the sheet pile clamp 8 and then drives the sheet pile. Repeat until the length of the guide frame 12 is insufficient, and connect the constructed sheet piles into a whole by passing the steel wire rope 7 through the fixing hole 5 to prevent the last sheet pile from shifting during the next drilling. After the connection is completed, remove the guide frame 12 and pull out the column 11. Drill water to drill the hole, and use the drill rod 1 with the same design length as the concrete sheet pile 4 to drill the hole. The drilling range is the length of the concrete sheet pile 4 that can be driven by the guide frame 12 at one time. Repeat the pile driving until the construction is completed.

[0081] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for driving precast U-shaped concrete sheet piles through pre-drilled holes, comprising the following steps: S1. The precast sheet pile has a hoisting hole (6) and a fixing hole (5); the hoisting hole (6) is located one-third of the way down from the head of the concrete sheet pile (4); S2. Determine the center line of the pile group and mark the center point of each sheet pile; S3. The drilling rig uses a drill rod (1) with the same design length as the concrete sheet pile (4) to make a water injection hole. The drill rod (1) is equipped with one-third of the drill bit (2) and a water injection hole in the middle. The water injection hole is connected to the water supply pipe (13) and the water supply pump (3) to continuously inject water during the drilling process, which plays a role in lubrication and cooling. S4. Drive the first concrete sheet pile (4). During the pile driving process, the verticality of the concrete sheet pile (4) is manually controlled by a plumb bob. S5. Install the steel guide frame (12). First, install the guide frame (12) and column (11) according to the length of the guide frame (12). Then, set up the guide channel on the first completed concrete sheet pile (4) and column (11), adjust the clamp, and connect the column (11) and the guide channel. S6. Insert the next sheet pile into the corresponding position in the steel guide frame (12), hoist the concrete sheet pile (4) into the guide groove, fix the position of the concrete sheet pile (4) by the vibratory pile driving machine (9), so that the vibratory pile driving machine (9) clamps the concrete sheet pile (4) to be driven by the sheet pile clamp (8) and then drives the sheet pile. S7. Repeat steps S5 and S6 until the guide frame (12) is not long enough. Then, connect the constructed sheet piles through the fixed hole (5) with the wire rope (7) to prevent the last sheet pile from shifting during the next drilling. S8. After the connection is completed, remove the guide frame (12) and pull out the column (11); S9. The drilling rig water injection pilot hole is made by using a drill rod (1) with the same design length as the concrete sheet pile (4); S10. Repeat pile driving until construction is completed.

2. The method for driving precast U-shaped concrete sheet piles using pre-drilled holes according to claim 1, characterized in that, In step S1, the height of the fixed hole (5) above the soil surface is left to ensure that the fixed hole (5) is above the soil surface after the pile driving is completed.

3. The method for driving precast U-shaped concrete sheet piles using pre-drilled holes according to claim 1, characterized in that, The fixing hole (5) in the precast concrete sheet pile (4) in step S1 is cut on site after the concrete sheet pile (4) is driven.

4. A precast U-shaped concrete sheet pile pre-drilling and driving device, used in the precast U-shaped concrete sheet pile pre-drilling and driving method according to any one of claims 1-3, characterized in that, The device includes a vibratory pile driver (9), one end of which is fixed with a sheet pile clamp (8). Both ends of the bottom of the sheet pile clamp (8) are fixed with wire ropes (7). A concrete sheet pile (4) is provided at the bottom of the wire ropes (7). A fixing hole (5) is provided inside the concrete sheet pile (4) and at one end of the hoisting hole (6). The hoisting hole (6) is provided inside the concrete sheet pile (4). Two wire ropes (7) pass through the hoisting hole (6) and connect to the concrete sheet pile (4). It also includes a water pump (3) and a drilling machine (10). One end of the drilling machine (10) is fixed with a drill rod (1), and the bottom of the drill rod (1) is fixed with a drill bit (2). The water pump (3) is located at one end of the drilling machine (10), and one end of the water pump (3) is fixed with a water supply pipe (13), and the other end of the water supply pipe (13) is connected to the drill rod (1).

5. A precast U-shaped concrete sheet pile pre-drilling and driving device according to claim 4, characterized in that, The concrete sheet pile (4) is U-shaped.

6. A precast U-shaped concrete sheet pile pre-drilling and driving device according to claim 4, characterized in that, It also includes a hand chain hoist (14) located at the bottom of the concrete sheet pile (4).

7. A precast U-shaped concrete sheet pile pre-drilling and driving device according to claim 4, characterized in that, A guide assembly is provided on one side of the concrete sheet pile (4). The guide assembly includes a column (11) and a guide frame (12). The guide frame (12) is fixed at one end of the top of the column (11).

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