Steel sheet pile construction method

Abstract

A steel sheet pile construction method, comprising: a first step of performing an anti-corrosion treatment on steel sheet piles (4); a second step of placing, according to a design drawing, a plane position line for pile sinking, controlling designed elevations of the steel sheet piles (4) according to an existing elevation point, and performing measurement, paying-off and positioning; a third step of mounting a steel sheet pile guide frame (3) on a trestle (1) pre-built behind a berth and a pre-driven cast-in-place pile (2); a fourth step of marking a number on each of the steel sheet piles (4) according to a driving sequence, marking scale water lines on the steel sheet piles (4), transporting the steel sheet piles (4) to the trestle (1) behind the berth, and brushing lock catches of the steel sheet piles (4) with butter; a fifth step of driving the steel sheet piles (4) with the aid of the steel sheet pile guide frame (3); and a sixth step of mounting an anode protection block on an underwater portion of each steel sheet pile (4). The method is used in combination with a steel sheet pile guiding mechanism, which enables accurate positioning and driving of the steel sheet piles.

Description

Steel sheet pile construction method Technical Field

[0001] The present invention relates to the technical field of hydraulic engineering construction, and more particularly to a steel sheet pile construction method. Background Art

[0002] Tanga Port, located in the Gulf of Tanga on Tanzania's northeastern coast, borders the western side of the Pemba Strait and is Tanzania's second-largest port. The Tanga Port Phase II wharf renovation and expansion project entails the construction of a new wharf with a total length of 450 meters and a width of 50 to 92 meters. The hydraulic pile foundation platform will be 38.5 meters wide and will include two berths. The wharf's hydraulic structure will utilize a high-pile beam-slab structure, with the pile foundations consisting of fully vertical cast-in-place piles with a diameter of 1.1 meters. The pile foundation platform will be formed behind the land. Berth No. 2 will be constructed using steel sheet piles with a designed pile length ranging from 13 to 31 meters. Z-shaped steel sheet piles will be manufactured by a domestic manufacturer and shipped to the project site by sea. They will be joined in two pieces upon shipment (as shown in Figure 1). Our company's patent application, application number 202111614134.9, discloses a steel sheet pile construction device designed to address the technical drawback of existing technologies, where the steel sheet pile guide mechanism requires both longitudinal and lateral movement, which slows down construction progress and prolongs the construction period. However, the steel sheet pile guide mechanism is more suitable for U-shaped steel sheet piles without lock buckles at the bottom of the trench, and is more suitable for the construction method of driving the piles one by one. Therefore, there is an urgent need for a steel sheet pile construction method and a steel sheet pile guide mechanism suitable for Z-shaped steel sheet piles.

[0003] Summary of the Invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide a steel sheet pile construction method, which can accurately position and inject steel sheet piles by cooperating with a steel sheet pile guide mechanism.

[0006] In order to achieve these objects and other advantages according to the present invention, there is provided a steel sheet pile construction method comprising:

[0007] Step 1: Anti-corrosion treatment of steel sheet piles: Based on the pile length and design elevation, apply a high-durability coating to the surface of the steel sheet piles exposed to the C5 environmental category, and apply a lightweight durable coating to the surface of the steel sheet piles exposed to the IM2 and IM3 environmental categories;

[0008] Step 2: Lay the planar position line of the pile according to the design drawing, control the design elevation of the steel sheet pile according to the existing elevation point, and measure the line positioning;

[0009] Step 3: Install the steel sheet pile guide frame on the pre-built trestle and pre-driven cast-in-place piles behind the berth;

[0010] Step 4: Mark the steel sheet pile numbers on the steel sheet piles according to the construction sequence, mark the scale waterline on the steel sheet piles, transport the steel sheet piles to the trestle behind the berth, and brush the steel sheet pile locks with butter to reduce the resistance to pile sinking;

[0011] Step 5: Drive the steel sheet piles with the help of the steel sheet pile guide frame. First, drive the 1st and 2nd steel sheet piles to the top height of the steel sheet pile guide frame, then insert the 3rd to mth steel sheet piles and drive them to the top height of the steel sheet pile guide frame, move the steel sheet pile guide frame along the steel sheet pile arrangement path, so that the 1st and 2nd steel sheet piles are outside the range of the steel sheet pile guide frame, continue to drive the 1st and 2nd steel sheet piles to the designed elevation, and at the same time insert the m+1th to nth steel sheet piles into the steel sheet pile guide frame, drive the m+1th to nth steel sheet piles to the top height of the steel sheet pile guide frame, move the steel sheet pile guide frame along the steel sheet pile arrangement path, so that the 3rd to mth steel sheet piles are outside the range of the steel sheet pile guide frame, continue to drive the 3rd to mth steel sheet piles to the designed elevation, and repeat the construction process of the 3rd to nth steel sheet piles for subsequent steel sheet piles until all steel sheet piles have been driven;

[0012] Step 6: Install anode protection blocks on the underwater part of each steel sheet pile.

[0013] Preferably, the steel sheet pile guide frame includes two guide frames of the same structure, one guide frame is arranged above the other guide frame, and the two guide frames are connected to each other, and the guide frames include:

[0014] The top end face of said sliding panel also is provided with an interlocking structure, and the interlocking structures between the two sliding panels are connected with each other through the interlocking structures.

[0015] The injection to the top height of the steel sheet pile guide frame in step 5 refers to injection to 25 to 35 cm above the top height of the guide beam of the upper guide frame.

[0016] Preferably, the two guide frames are connected to each other through a column at one end and through a gantry at the other end, and when step 5 is performed, the gantry holes allow steel sheet piles driven to the height of the top of the steel sheet pile guide frame to pass through;

[0017] The two vertical beams of the portal frame are provided with a second sliding groove in the vertical direction on the side surfaces away from the end surfaces of the guide beams, and a bolt is slidably provided in the second sliding groove, and the head of the bolt is located in the second sliding groove. Circular holes corresponding to the bolts on the two vertical beams of the portal frame are provided at both ends, and the movable beam is fixed to the portal frame by nuts after the bolts pass through the circular holes. When the movable beam is located at the upper end of the second sliding groove, the portal frame hole below the movable beam allows the steel sheet piles driven to the height of the top of the steel sheet pile guide frame to pass through.

[0018] Preferably, the guide plate includes multiple single boards, and among two adjacent single boards, a pin is provided at the top of one single board, and a pin hoop is provided at the top of the other single board. When the end faces of the two adjacent single boards are aligned, the pin at the top of one single board is opposite to the pin hoop at the top of the other single board. The two single boards can be connected into one by inserting the pin at the top of one single board into the pin hoop at the top of the other single board.

[0019] Preferably, the driving process of each steel sheet pile includes: using a crane to lift the steel sheet pile to the position above the steel sheet pile guide frame and drive the pile at the driving point, aligning the lock of the current steel sheet pile with the lock of the previous steel sheet pile when driving the pile, and each time a steel sheet pile is inserted into the seabed, a pile cap is put on and a hardwood pad is added to the pile cap, and then hammered, and the verticality of the steel sheet pile is controlled by a theodolite during hammering. The steel sheet pile is driven in multiple times, the first time to a meter, the second time to b meter, the third time to the height of the top of the steel sheet pile guide frame, and the fourth time to the design elevation after the steel sheet pile guide frame is removed.

[0020] Preferably, when the first and second steel sheet piles are driven, measurement is taken every time they are lowered by 1 m to ensure that the driving positions and directions of the first and second steel sheet piles are accurate.

[0021] Preferably, after the steel sheet piles are transported to the trestle, the steel sheet piles and their locks are checked one by one. Any parts that are not straight are straightened by using a clamp, a jack and an acetylene flame under heating.

[0022] Preferably, the pile position is staked out after each movement of the steel sheet pile guide frame, the position of the first pile in the steel sheet pile guide frame is staked out, and the positions of the other piles are measured with a steel ruler and marked on the steel sheet pile guide frame.

[0023] Preferably, if verticality deviation occurs during the injection of the steel sheet pile, the steel sheet pile is adjusted by rotating the crane. When the verticality cannot be adjusted after the steel sheet pile is buried deeper than 12m, the steel sheet pile is pulled out and injected again.

[0024] Preferably, the distance between the two steel sheet piles is measured with a tape measure after each pile is driven. If the distance between the two steel sheet piles exceeds a threshold, the pile spacing is adjusted when subsequent steel sheet piles are driven to average out the deviation.

[0025] The present invention includes at least the following beneficial effects: 1. Through the steel sheet pile guide frame designed in this application and the steel sheet pile construction method coordinated with the steel sheet pile guide frame, during the steel sheet pile construction process, a group of steel sheet piles can be positioned and guided each time, and because a group of steel sheet piles are connected by a locking buckle, a single steel sheet pile is not easily displaced, and construction efficiency and construction quality are guaranteed. The steel sheet pile guide frame is designed with an adjustable guide plate, so that the front and rear groups of steel sheet piles sunk in batches can maintain the same accuracy requirements, simplifying the construction process and improving construction efficiency; 2. The steel sheet pile guide frame can drive the guide plate to move by moving the slider, so that the guide plate guides the steel sheet piles with indefinite insertion points at different positions of the guide beam, and the screw on the slider can be screwed in and out to control the spacing between the two guide plates, so that it can adapt to steel sheet piles of different thicknesses; 3. When the steel sheet pile guide frame is placed, the traditional steel sheet pile guide frame needs to strictly align the center line of the steel sheet pile guide frame with the steel sheet pile sinking plane line, and the steel sheet pile guide frame needs to be moved and adjusted by a crane, so the centering operation is difficult. The present application does not need to strictly align the steel sheet pile sinking plane line with the center line of the steel sheet pile guide frame. It only needs to fine-tune the screw to make the center line of the vertical line between the two guide plates coincide with the center line of the steel sheet pile guide frame. Therefore, the difficulty of centering the steel sheet pile guide frame is reduced.

[0026] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the structure of two pieces of Z-shaped steel sheet piles spliced ​​together according to the present invention;

[0028] FIG2 is a top view of the steel sheet pile guide frame according to an embodiment of the present invention installed on a trestle and cast-in-place piles;

[0029] FIG3 is a schematic diagram of the three-dimensional structure of the steel sheet pile guide frame according to an embodiment of the present invention;

[0030] FIG4 is a schematic diagram of a vertical cross-sectional structure of a guide beam according to an embodiment of the present invention;

[0031] FIG5 is a schematic diagram of a horizontal cross-sectional structure of a door frame according to an embodiment of the present invention;

[0032] FIG6 is a top view of a single board according to an embodiment of the present invention;

[0033] FIG7 is a construction flow chart of driving steel sheet piles in step five of an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0035] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0036] As shown in Figures 1 to 7, an embodiment of the present invention provides a steel sheet pile construction method, comprising:

[0037] Step 1: Perform anti-corrosion treatment on the steel sheet piles 4. Based on the pile length and design elevation, apply a high-durability coating to the surface of the steel sheet piles 4 areas exposed to the C5 environmental category, and apply a light-weight durable coating to the surface of the steel sheet piles 4 areas exposed to the IM2 and IM3 environmental categories.

[0038] Specifically, the corrosion protection of the steel structure should comply with the provisions of BS EN ISO 12944, with the atmospheric corrosivity category C5 for the atmospheric area and IM2 and IM3 for the immersed area of ​​the steel sheet piles 4. The surface of the steel sheet piles 4 areas exposed to the C5 environmental category is coated with a 900μm high-durability coating, and the surface of the steel sheet piles 4 areas exposed to the IM2 and IM3 environmental categories is coated with a 600μm light-weight durable coating.

[0039] Before coating, the surface of the steel sheet pile 4 is sandblasted. The surface cleanliness requirement achieved by sandblasting is Sa2.5 level of ISO8501-1. According to BS EN ISO8503-2:1995, the roughness requirement is "medium G" roughness.

[0040] The coating application should start within 4 hours after the surface treatment of the steel sheet pile 4. The surface of the prepared steel sheet pile 4 should be dry and free of rust, scale, dust, grease or other visible contaminants. For areas with complex corners and small dimensions that are prone to missing coating or insufficient coating thickness, brush or spray coating should be applied multiple times to achieve the designed thickness.

[0041] Step 2: Lay down the pile plane position line according to the design drawing, control the design elevation of the steel sheet pile 4 according to the existing elevation point, and measure the line positioning;

[0042] Step 3: Install the steel sheet pile guide frame 3 on the pre-built trestle 1 and pre-driven cast-in-place piles 2 behind the berth;

[0043] Specifically, the steel sheet pile guide frame 3 includes two guide frames of the same structure, one guide frame is arranged above the other guide frame, and the two guide frames are connected to each other. The guide frames include:

[0044] A pair of parallel and spaced guide beams 301 are provided, one end of the two guide beams 301 is connected by a fixed crossbeam 302, and the opposite sides of the two guide beams 301 are provided with a first slide groove along the length direction of the guide beam 301, and a slider 303 is slidably connected in the first slide groove. The bottom surface of the first slide groove is provided with an oblong through hole of the same length as the slide groove and crossing the guide beam 301 along the length direction of the guide beam 301, and a plurality of screw holes are provided on the slider 303 at even intervals along the length direction of the guide beam 301. The screw holes are opposite to the long through holes, and the screw holes in the screw holes are screwed. The groove is connected to a screw rod 304, one end of the screw rod 304 passes through the oblong through hole and extends to the outside of the guide beam 301, and the other end extends to the inside of the guide beam 301. The ends of all the screw rods 304 on the slider 303 extending to the inside of the guide beam 301 are connected to the same guide plate 305, and the ends of the screw rods 304 are rotatably connected to the guide plate 305. The steel sheet piles 4 are inserted between the two guide plates 305 corresponding to the pair of guide beams 301 to guide the steel sheet piles 4, and the opposite plate surfaces of the two guide plates 305 are provided with guide rollers 306.

[0045] The steel sheet pile guide frame 3 can be driven by the movable slider 303 to move the guide plates 305, allowing the guide plates 305 to guide the steel sheet piles 4 at various locations on the guide beam 301 for various insertion points. The screw 304 on the slider 303 can be screwed in and out to control the spacing between the two guide plates 305, thus accommodating steel sheet piles 4 of varying thicknesses. Furthermore, when placing the steel sheet pile guide frame 3, it is not necessary to strictly align the plane of the steel sheet pile 4 sinking with the centerline of the steel sheet pile guide frame 3. The screw 304 can simply be fine-tuned to align the centerline of the perpendicular between the two guide plates 305 with the centerline of the steel sheet pile guide frame 3. The guide rollers 306 provided on the guide plates 305 ensure rolling contact between the steel sheet piles 4 and the guide plates 305, preventing sliding contact from causing significant resistance and potentially scratching the anti-corrosion coating of the steel sheet piles 4.

[0046] When installing the steel sheet pile guide frame 3, a theodolite and a level are used to control the position and height of the steel sheet pile guide frame 3. The steel sheet pile guide frame 3 is fixedly connected to the trestle 1 and the cast-in-place piles 2 respectively by welding or bolting 309 to prevent the steel sheet pile guide frame 3 from shifting when the steel sheet piles 4 are installed. The distance between the two guide plates 305 is then adjusted by rotating the screw 304 according to the size of the steel sheet piles 4 to ensure the positioning and guidance of the steel sheet piles 4 to be installed.

[0047] Step 4: Mark the steel sheet pile 4 number on the steel sheet pile 4 according to the construction sequence, mark the scale waterline on the steel sheet pile 4, transport the steel sheet pile 4 to the trestle 1 behind the berth, and brush the lock of the steel sheet pile 4 with butter to reduce the pile sinking resistance;

[0048] Step 5: Use the steel sheet pile guide frame 3 to drive the steel sheet piles 4. First, drive the 1st and 2nd steel sheet piles 4 to the top height of the steel sheet pile guide frame 3. Then insert the 3rd to mth steel sheet piles 4 and drive them to the top height of the steel sheet pile guide frame 3. Move the steel sheet pile guide frame 3 along the arrangement path of the steel sheet piles 4 so that the 1st and 2nd steel sheet piles 4 are outside the range of the steel sheet pile guide frame 3. Continue to drive the 1st and 2nd steel sheet piles 4 to the designed elevation. At the same time, Insert the m+1 to n steel sheet piles 4 into the frame 3, and drive the m+1 to n steel sheet piles 4 to the top height of the steel sheet pile guide frame 3. Move the steel sheet pile guide frame 3 along the arrangement path of the steel sheet piles 4 so that the 3 to m steel sheet piles 4 are outside the range of the steel sheet pile guide frame 3. Continue to drive the 3 to m steel sheet piles 4 to the designed elevation. Repeat the construction process of the 3 to n steel sheet piles 4 for subsequent steel sheet piles 4 until all steel sheet piles 4 have been driven.

[0049] Specifically, the injection to the top height of the steel sheet pile guide frame 3 refers to injection to 25 to 35 cm above the top height of the guide beam 301 of the upper guide frame.

[0050] Here, because the first and second steel sheet piles 4 serve as guide plates 305 for subsequent steel sheet piles 4, the first and second steel sheet piles 4 are driven separately to ensure the accuracy of their driving position and direction. Specifically, when the first and second steel sheet piles 4 are driven, measurements are taken every 1 meter of descent to ensure the accuracy of the driving position and direction of the first and second steel sheet piles 4.

[0051] Specifically, when the 1st and 2nd steel sheet piles 4 are driven, the guide plate 305 on the steel sheet pile guide frame 3 is moved to the left end of the steel sheet pile guide frame 3 to guide the 1st and 2nd steel sheet piles 4. When the 1st and 2nd steel sheet piles 4 are driven to the top height of the steel sheet pile guide frame 3, the guide plate 305 is slightly moved to the right to position and guide the 3rd to mth steel sheet piles 4. When the 3rd to mth steel sheet piles 4 are also driven to the top height of the steel sheet pile guide frame 3, the steel sheet pile guide frame 3 is moved to the right by a crane so that the 1st and 2nd steel sheet piles 4 are outside the range of the steel sheet pile guide frame 3. At this time, the vacant position in the steel sheet pile guide frame 3 can be used for positioning and guiding the m+1st to nth steel sheet piles 4 , continue to drive the 1st and 2nd steel sheet piles 4 to the designed elevation, and at the same time move the guide plate 305 right to the insertion point of the m+1 to nth steel sheet pile 4, and then insert the m+1 to nth steel sheet pile 4 into the steel sheet pile guide frame 3, and drive the m+1 to nth steel sheet pile 4 to the top height of the steel sheet pile guide frame 3, and then continue to use the crane to move the steel sheet pile guide frame 3 to the right, so that the 3rd to mth steel sheet piles 4 are outside the range of the steel sheet pile guide frame 3. At this time, the vacant position in the steel sheet pile guide frame 3 can be used to position and guide the next batch of steel sheet piles 4, and the 3rd to mth steel sheet piles 4 can also continue to be driven to the designed elevation, and this cycle is repeated until all steel sheet piles 4 have been driven.

[0052] Here, the specific values ​​of the 3rd to mth steel sheet piles 4 and the m+1st to nth steel sheet piles 4 are determined according to the actual construction site conditions.

[0053] Step 6: Install an anode protection block on the underwater portion of each steel sheet pile 4.

[0054] Specifically, the specifications of the anode protection block are 1050×(200+240)×180mm, the net weight is 109kg, and the gross weight is 119.5kg. According to the design requirements for the installation position, the installation elevation of most of the anode protection blocks is -3.00mPD. This project uses underwater welding for installation. Before installing the anode protection blocks, an appearance inspection is carried out first, and the appearance quality should meet the requirements of relevant standards. The inspection and correction of the weld feet of the anode protection blocks are carried out on land. Only anode protection blocks that pass the inspection and correction can be installed at sea. To ensure the quality of welding, marine organisms and debris at the welding points are removed, and the anti-corrosion layer at the welding position is knocked off until the smooth surface of the steel sheet pile 4 is exposed. The area of ​​anti-corrosion removal should not be too large, and it is best to just meet the welding requirements.

[0055] Divers dive to tie the anode protection blocks, using a rope to wrap around the steel sheet pile 4, and then tie the two welding legs of the anode protection blocks to the steel sheet pile 4. After entering the water, the divers first check the tied anode protection blocks. If they are unqualified, they will be adjusted first, and only after they are qualified will welding be carried out. Welding is carried out from top to bottom, and the weld bead and the welding rod maintain a certain angle. After the diving welder finishes welding, the welding results should be checked. The weld seam requires that each weld leg be welded on all four sides. After the weld seam is full and qualified, it will be transferred to the next procedure. If it does not meet the requirements, it needs to be re-welded or repaired until it meets the technical requirements. After each anode protection block is welded, a diver with inspection qualifications is sent to inspect the welding results.

[0056] In the above-described embodiment, the steel sheet pile guide frame 3 and the steel sheet pile 4 construction method used in conjunction with the steel sheet pile guide frame 3 design of this application enable positioning and guidance of a group of steel sheet piles 4 at a time during construction. Furthermore, because a group of steel sheet piles 4 is connected by a locking mechanism, individual steel sheet piles 4 are less likely to shift, ensuring both construction efficiency and quality. The steel sheet pile guide frame 3 includes an adjustable guide plate 305, which allows the two groups of steel sheet piles 4, each being sunk in succession, to maintain the same precision, simplifying the construction process and improving efficiency.

[0057] In the previous embodiment, only one end of the two guide beams 301 of the upper guide frame and the lower guide frame are connected by the fixed crossbeam 302. However, during the injection of the steel sheet piles 4, the vibration or deformation of the steel sheet piles 4 will generate lateral pressure on the guide plate 305. Over time, it is easy for the upper guide frame and the lower guide frame to deform into a V shape, which will lead to inaccurate positioning and guiding of the steel sheet pile guide frame 3. Therefore, the following embodiment proposes an improvement plan.

[0058] In another embodiment, the two guide frames are connected to each other at one end by a column 307 and at the other end by a gantry 308. When step five is performed, the holes in the gantry 308 allow the steel sheet piles 4 driven to the height of the top of the steel sheet pile guide frame 3 to pass through.

[0059] The two vertical beams of the portal frame 308 are provided with second sliding grooves in the vertical direction on the side surfaces away from the end surfaces of the guide beam 301, and bolts 309 are slidably provided in the second sliding grooves, and the heads of the bolts 309 are located in the second sliding grooves. Circular holes corresponding to the bolts 309 on the two vertical beams of the portal frame 308 are provided at both ends of a movable crossbeam 310. After the bolts 309 pass through the circular holes, the movable crossbeam 310 is fixed to the portal frame 308 by nuts 311. When the movable crossbeam 310 is located at the upper end of the second sliding groove, the hole of the portal frame 308 below the movable crossbeam 310 allows the steel sheet piles 4 driven to the top height of the steel sheet pile guide frame 3 to pass through.

[0060] When the above embodiment is used, when it is necessary to inject the steel sheet pile 4, the nut 311 is loosened and the position of the movable crossbeam 310 is adjusted so that it is located between the upper guide frame and the lower guide frame, and the nut 311 is tightened again to fix the movable crossbeam 310 so that the movable crossbeam 310 constrains the other ends of the guide beams of the upper guide frame and the lower guide frame from moving away from each other; when it is necessary to move the steel sheet pile guide frame 3, the nut 311 is loosened and the position of the movable crossbeam 310 is adjusted so that its lower end is located above the height of the top of the steel sheet pile guide frame 3, and the nut 311 is tightened again to fix the movable crossbeam 310. In this way, when the steel sheet pile guide frame 3 moves, the movable crossbeam 310 will not hit the steel sheet pile 4 injected to the height of the top of the steel sheet pile guide frame 3, and the steel sheet pile guide frame does not need to be hoisted to above the height of the top of the steel sheet pile guide frame 3, which makes construction convenient and improves safety.

[0061] In the above embodiment, the connection between the other ends of the two guide beams 301 is further strengthened by the crossbeam of the portal frame 308 and the movable crossbeam 310 to avoid deformation of the upper guide frame and the lower guide frame. The movable crossbeam 310 can be moved up and down and fixed without hindering the movement of the rod steel sheet pile guide frame 3.

[0062] In another embodiment, the guide plate 305 includes multiple single plates 3051. Among two adjacent single plates 3051, a pin 3052 is provided at the top of one single plate 3051, and a pin hoop 3053 is provided at the top of the other single plate 3051. When the end surfaces of the two adjacent single plates 3051 are aligned, the pin 3052 at the top of one single plate 3051 is opposite to the pin hoop 3053 at the top of the other single plate 3051. By inserting the pin 3052 at the top of one single plate 3051 into the pin hoop 3053 at the top of the other single plate 3051, the two single plates 3051 can be connected into one.

[0063] In the above embodiment, by dividing the guide plate 305 into several single plates 3051, only the single plate 3051 can be used to guide and position a certain steel sheet pile 4 without adjusting all the screws 304 on the guide plate 305. When multiple single plates 3051 are needed to be combined to form a guide plate 305, it is only necessary to connect adjacent single plates 3051 with pins 3052, which is more convenient to use.

[0064] In another embodiment, the driving process of each steel sheet pile 4 includes: using a crane to lift the steel sheet pile 4 to the position above the steel sheet pile guide frame 3 and drive the pile at the driving point, aligning the lock of the current steel sheet pile 4 with the lock of the previous steel sheet pile 4 when driving the pile, and each time a steel sheet pile 4 is inserted into the seabed, a pile cap is put on and a hardwood pad is added to the pile cap, and then hammered. During hammering, a theodolite is used to control the verticality of the steel sheet pile 4. The steel sheet pile 4 is driven in multiple times, the first time to a meter, the second time to b meter, the third time to the height of the top of the steel sheet pile guide frame 3, and the fourth time to the design elevation after the steel sheet pile guide frame 3 is removed.

[0065] In the above embodiment, by installing a pile cap and hardwood pad on the top of the steel sheet pile 4, deformation of the top of the steel sheet pile 4 can be avoided. Furthermore, the steel sheet pile 4 is installed in multiple stages. Even if the steel sheet pile 4 deviates during installation, it can be easily removed and corrected, reducing the difficulty of corrective work. Here, a and b are both heights above the water surface. The specific values ​​of a and b are determined based on the construction site conditions.

[0066] In another embodiment, after the steel sheet piles 4 are transported to the trestle 1, the steel sheet piles 4 and their locks are checked one by one. Any parts that are not straight are straightened under heating using a clamp, a jack and an acetylene flame. This can better ensure the injection accuracy of the steel sheet piles 4.

[0067] In another embodiment, the pile position is laid out after each movement of the steel sheet pile guide frame 3, the position of the first pile in the steel sheet pile guide frame 3 is laid out, and then the positions of the other piles are measured with a steel ruler and marked on the steel sheet pile guide frame 3, so that it is convenient for the staff to observe and locate the position of the steel sheet pile 4.

[0068] In another embodiment, if verticality deviation occurs during the injection of the steel sheet pile 4, the steel sheet pile 4 is adjusted by rotating the crane. When the verticality of the steel sheet pile 4 cannot be adjusted after the depth of the steel sheet pile 4 in the soil exceeds 12m, the steel sheet pile 4 is pulled out and injected again.

[0069] In another embodiment, the distance between two steel sheet piles 4 is measured with a tape measure after each pile is driven. If the distance between the two steel sheet piles 4 exceeds a threshold value, the pile spacing is adjusted when subsequent steel sheet piles 4 are driven to average out the deviation. The pile position and driving process of each pile are measured and controlled, so that the deviation of the pile can be adjusted and controlled in a timely manner through each pile, thereby avoiding the cumulative error of the pile position and ensuring the construction quality of the project.

[0070] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A steel sheet pile construction method, characterized in that: include: Step 1: Anti-corrosion treatment is performed on the steel sheet piles. According to the pile length and design elevation, a high-durability coating is applied to the surface of the steel sheet pile area exposed to the C5 environmental category, and a light-weight durable coating is applied to the surface of the steel sheet pile area exposed to the IM2 and IM3 environmental categories; Step 2: Lay down the plane position line of the pile according to the design drawing, control the design elevation of the steel sheet pile according to the existing elevation points, and measure the line positioning; Step 3: Install the steel sheet pile guide frame on the pre-built trestle and pre-driven cast-in-place piles behind the berth; Step 4: Mark the steel sheet pile numbers on the steel sheet piles according to the order of injection, mark the scale waterline on the steel sheet piles, transport the steel sheet piles to the pier behind the berth, and brush the steel sheet pile locks with butter to reduce the resistance to pile sinking; Step 5: Drive the steel sheet piles with the help of the steel sheet pile guide frame. First, drive the 1st and 2nd steel sheet piles to the top height of the steel sheet pile guide frame, then insert the 3rd to mth steel sheet piles and drive them to the top height of the steel sheet pile guide frame, move the steel sheet pile guide frame along the steel sheet pile arrangement path, so that the 1st and 2nd steel sheet piles are outside the range of the steel sheet pile guide frame, continue to drive the 1st and 2nd steel sheet piles to the designed elevation, and at the same time insert the m+1st to nth steel sheet piles into the steel sheet pile guide frame, drive the m+1st to nth steel sheet piles to the top height of the steel sheet pile guide frame, move the steel sheet pile guide frame along the steel sheet pile arrangement path, so that the 3rd to mth steel sheet piles are outside the range of the steel sheet pile guide frame, continue to drive the 3rd to mth steel sheet piles to the designed elevation, and the subsequent steel sheet piles repeat the construction process of the 3rd to nth steel sheet piles until all the steel sheet piles are driven; Step 6: Install anode protection blocks on the underwater part of each steel sheet pile.

2. The steel sheet pile construction method according to claim 1, characterized in that: The steel sheet pile guide frame comprises two guide frames of the same structure, one guide frame is arranged above the other guide frame, and the two guide frames are connected to each other. The guide frame comprises: A pair of guide beams are arranged in parallel and spaced apart, one end of the two guide beams is connected by a fixed crossbeam, the opposite sides of the two guide beams are provided with a first slide groove along the length direction of the guide beam, a slider is slidably connected in the first slide groove, an oblong through hole of the same length as the slide groove and crossing the guide beam is opened on the bottom surface of the first slide groove along the length direction of the guide beam, a plurality of screw holes are opened on the slider at even intervals along the length direction of the guide beam, and the screw holes are connected to the guide beam by the first slide groove. The long through holes are opposite to each other, a screw is threadedly connected in the screw hole, one end of the screw passes through the long round through hole and extends to the outside of the guide beam, and the other end extends to the inside of the guide beam. One end of all the screws on the slider extending to the inside of the guide beam is connected to the same guide plate, and the end of the screw is rotatably connected to the guide plate. The steel sheet piles are inserted between the two guide plates corresponding to the pair of guide beams to guide the steel sheet piles, and the plate surfaces opposite to the two guide plates are provided with guide rollers; The injection to the top height of the steel sheet pile guide frame in step 5 refers to injection to 25 to 35 cm above the top height of the guide beam of the upper guide frame.

3. The steel sheet pile construction method according to claim 2, characterized in that: The two guide frames are connected to each other through a column at one end and through a gantry at the other end. When executing step 5, the gantry holes allow the steel sheet piles driven to the top height of the steel sheet pile guide frame to pass through; The two vertical beams of the portal frame are provided with second slide grooves in the vertical direction on the side surfaces away from the end surfaces of the guide beams, and bolts are slidably provided in the second slide grooves. The heads of the bolts are located in the second slide grooves, and circular holes corresponding to the bolts on the two vertical beams of the portal frame are provided at both ends. After the bolts pass through the circular holes, the movable beam is fixed to the portal frame by nuts. When the movable beam is located at the upper end of the second slide groove, the portal frame holes below the movable beam allow the steel sheet piles driven to the height of the top of the steel sheet pile guide frame to pass through.

4. The steel sheet pile construction method according to claim 2, characterized in that: The guide plate includes multiple single plates. Among two adjacent single plates, a pin is provided at the top of one single plate, and a pin hoop is provided at the top of the other single plate. When the end surfaces of the two adjacent single plates are aligned, the pin at the top of one single plate is directly opposite to the pin hoop at the top of the other single plate. The two single plates can be connected as one by inserting the pin at the top of one single plate into the pin hoop at the top of the other single plate.

5. The steel sheet pile construction method according to claim 1, characterized in that: The driving process of each steel sheet pile includes: using a crane to lift the steel sheet pile to the position above the steel sheet pile guide frame and drive the pile at the driving point, aligning the lock of the current steel sheet pile with the lock of the previous steel sheet pile when driving the pile, and putting a pile cap on each steel sheet pile inserted into the seabed and adding a hardwood pad on the pile cap, and then hammering. When hammering, use a theodolite to control the verticality of the steel sheet pile. The steel sheet pile is driven in several times, the first time to a meter, the second time to b meter, the third time to the height of the top of the steel sheet pile guide frame, and the fourth time to the designed elevation after the steel sheet pile guide frame is removed.

6. The steel sheet pile construction method according to claim 1, characterized in that: When the first and second steel sheet piles are driven, measurement is taken every time they descend 1m to ensure that the driving position and direction of the first and second steel sheet piles are accurate.

7. The steel sheet pile construction method according to claim 1, characterized in that: After the steel sheet piles are transported to the trestle, the steel sheet piles and their locks are checked one by one. Any parts that are not straight are straightened under heating using clamps, jacks and acetylene flames.

8. The steel sheet pile construction method according to claim 1, characterized in that: The pile positions are laid out after each movement of the steel sheet pile guide frame, the position of the first pile in the steel sheet pile guide frame is laid out, and then the positions of other piles are measured with a steel ruler and marked on the steel sheet pile guide frame.

9. The steel sheet pile construction method according to claim 1, characterized in that: If verticality deviation occurs during the steel sheet pile injection process, the steel sheet pile is adjusted by rotating the crane. When the verticality cannot be adjusted when the steel sheet pile is buried deeper than 12m, the steel sheet pile is pulled out and re-injected.

10. The steel sheet pile construction method according to claim 1, characterized in that: After each pile is driven, the distance between the two steel sheet piles is measured with a tape measure. If the distance between the two steel sheet piles exceeds the threshold, the pile spacing is adjusted when the subsequent steel sheet piles are driven to average out the deviation.

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