Underwater pile installation management method

Abstract

To perform pile installation while preventing contact between guide steel pipes provided in a template for positioning with a steel pipe pile, and thereby eliminate positional deviation of the template for positioning and easily remove the template for positioning after completion of pile installation.SOLUTION: An underwater pile installation management method includes: a first step of submerging a template 1 for positioning that is composed of a steel material assembled in a lattice shape in plan view, where guide steel pipes 13 having circular cross sections are provided at pile installation positions, to a water bottom; a second step of positioning a pile installation device 5 to a predetermined pile installation place, and setting a steel pipe pile 8; a third step of electrically connecting the steel pipe pile 8 and the guide steel pipes 13 of the template 1 for positioning through a power source 26 and contact alarm means 27; and a fourth step of installing the steel pipe pile 8 so as not to contact the guide steel pipes 13 while monitoring alarm by the contact alarm means 27.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a driving management method for driving underwater piles accurately into the bottom of a body of water such as the bottom of a sea, river, or lake. [Background technology]

[0002] Conventionally, in order to fix and stably support underwater structures such as caissons and water gate structures to the bottom of the water, a large number of underwater piles have been driven into the bottom of the water in advance, and the underwater structure has been fixed integrally to these underwater piles.

[0003] Several methods have been proposed for driving underwater piles into the bottom of a boat with high accuracy. For example, the following Patent Document 1 discloses a pile driving device in which a hoisting boom is attached to the front of a rotating part of a swivel crane mounted on a barge, a hoisting machine is provided on the swivel, a percussion device is hung from the hoisting wire of the hoisting machine via the hoisting boom, a pile is attached to the percussion device, one end of a telescopic boom is pivotally attached to the front of the rotating part of the swivel crane so as to be able to be hoisted, the hoisting device is connected to the telescopic boom, a gripping device for detachably gripping and holding the pile is provided at the other end of the telescopic boom, and the gripping device is composed of a swinging member provided to be able to be hoisted at the other end of the telescopic boom, and a gripping arm attached to the swinging member.

[0004] The following Patent Document 2 discloses a pile driving device comprising a pile driving work vessel, a crane equipped with pile driving members that are arranged on the pile driving work vessel so as to be freely rotatable in a horizontal plane and that suspends piles and drives them into the sea, and a positioning means that holds the middle of the pile suspended from the crane and positions it.

[0005] In the case of the pile driving devices according to Patent Documents 1 and 2, the pile driving accuracy is improved by providing a pile positioning device on the above-water part. However, even if the positioning of the pile part above the water can ensure the accuracy on the above-water part, it is not possible to ensure the driving accuracy on the seabed. Specifically, as shown in FIG. 17, even if a vibro hammer 50 is suspended by a crane on a crane barge 53 and the positioning of an underwater pile 51 is controlled by a surveying instrument such as a total station 52, even if the underwater pile 51 has a slight inclination θ on the above-water part, an error S1 of (water depth Lb + above-water pile length La) × tan θ will occur on the bottom of the water. If the inclination angle θ is 1.6°, the water depth Lb is 10 m, and the above-water pile length La is 3 m, an error S1 of 363 mm will occur on the bottom of the water.

[0006] Therefore, in order to improve the accuracy of underwater pile driving, an invention has been proposed in which a template member is submerged on the bottom of the water to determine positioning when driving piles, thereby increasing the accuracy of driving piles.

[0007] For example, Patent Document 3 listed below discloses a template device for installing caissons, which is used when installing and fixing caissons on a number of foundation piles driven into the seabed, by sinking the template device before the foundation piles are driven in, so that the caissons function as a ruler for driving the foundation piles and as a receiving tray when the caissons are sinking. The template device has a template body made of a framework steel structure that is approximately lattice-shaped in plan, and pile insertion portions are formed in each square of the lattice-shaped portion of the template body, for passing the foundation piles vertically.

[0008] Furthermore, Patent Document 4 listed below discloses a pile core positioning member for a pile to be driven into a water bottom ground, the pile core positioning member having a concrete template body formed in a flat plate shape, in which a guide tube for positioning the pile is provided. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Utility Model Application Publication No. 4-30185 [Patent Document 2] Japanese Patent Application Publication No. 7-259093 [Patent Document 3] Japanese Patent Application Publication No. 9-310352 [Patent Document 4] JP 2014-134054 A Summary of the Invention [Problem to be solved by the invention]

[0010] However, in the above-mentioned Patent Documents 3 and 4, the positioning of the piles is easily achieved by using a template device and a pile core positioning member sunk to the bottom of the water, but if the piles are driven while in contact with the pile insertion section or guide tube of the template device, it is possible that the template device and the pile core positioning member will be subjected to lateral forces from the piles and may shift horizontally.Even if they do not shift in position, if a large number of piles are driven at an angle while in contact with the pile insertion section or guide tube, there is a risk that the template device and the pile core positioning member will not be able to be removed upwards after all the piles have been driven.

[0011] Furthermore, when the template device to be submerged on the bottom of the water is a large structure, it must be divided and connected underwater, but there is a problem in that the connection work is time-consuming.

[0012] Therefore, the first object of the present invention is to sink a pile positioning template on the bottom of the water and drive underwater piles by driving the piles while preventing contact between the guide steel pipes provided on the positioning template and the piles, thereby eliminating misalignment of the positioning template and enabling it to be easily removed after pile driving is completed.

[0013] The second challenge is to improve the efficiency of the work required for connecting the divided positioning templates underwater. [Means for solving the problem]

[0014] In order to solve the above problems, the present invention according to claim 1 provides a method for managing driving of steel pipe piles toward the bottom of the water using a pile driving device installed on the water, It is made up of steel members assembled in a grid pattern in plan view, and the pile driving position is It is made of steel pipes with an inner diameter of D+2L, which is the diameter of the steel pipe pile plus twice the pile driving completion control standard value L. A first step is to sink pile positioning templates, each of which is provided with a guide steel pipe having a circular cross section, into the water bottom; A second step of positioning the pile driving device at a predetermined pile driving location and setting a steel pipe pile; A third step of electrically connecting the steel pipe pile and the guide steel pipe of the positioning template via a power source and a contact warning means; There is provided a method for managing the driving of underwater piles, comprising a fourth step of driving the steel pipe pile so that it does not come into contact with the guide steel pipe while monitoring the warning by the contact warning means.

[0015] The invention described in claim 1 includes a first step of sinking a pile positioning template, which is made of steel materials assembled in a grid shape in a plan view and has guide steel pipes with circular cross sections at the pile driving positions, into the bottom of the water, and a second step of positioning a pile driving device at a predetermined pile driving position and setting a steel pipe pile. Up to this point, the pile driving device is a normal procedure, but the present invention particularly includes a third step of electrically connecting the steel pipe pile and the guide steel pipe of the positioning template via a power source and a contact warning means. Therefore, by driving the steel pipe pile without contacting the guide steel pipe while monitoring the warning from the contact warning means, it is possible to eliminate the positional displacement of the positioning template and to easily remove it after the pile driving is completed.

[0016] In addition,It is desirable that the inner diameter of the steel pipe be the dimension (D+2L) obtained by adding twice the diameter D of the underwater pile to the pile driving completion control standard value L.

[0017] Claim 2 According to the present invention, the contact warning means is a lamp and / or a buzzer. Article 1 The present invention provides a method for controlling the driving of the above underwater piles.

[0018] The above claims 2 In the described invention, the contact warning means is specifically defined. Specifically, a lamp and / or a buzzer can be suitably used as the contact warning means.

[0019] Claim 3 According to the present invention, an underwater camera capable of visualizing the steel pipe pile and the guide steel pipe is installed to monitor the driving status. 、2 A method for managing the driving of underwater piles according to any one of the preceding claims is provided.

[0020] The above claims 3 In the described invention, an underwater camera that can see the steel pipe pile and the guide steel pipe is installed to monitor the driving status. By monitoring with the underwater camera whether the steel pipe pile is positioned inside the guide steel pipe, preferably at its center position, the positioning of the steel pipe pile can be easily performed.

[0021] Claim 4 As the present invention, there is provided a guide frame facility on the water, which serves both as a scaffold for welding steel pipe piles and as a scaffold for positioning the steel pipe piles. 3 A method for managing the driving of underwater piles according to any one of the preceding claims is provided.

[0022] The above claims 4 In the described invention, a guide frame facility is provided above water, which serves both as a scaffold for welding steel pipe piles and for positioning the steel pipe piles.

[0023] Claim 5As the present invention, the pile driving device is a vibro hammer suspended by a crane. 4 A method for managing the driving of underwater piles according to any one of the preceding claims is provided.

[0024] The above claims 5 In the described invention, the pile driving device is specifically defined. Specifically, the pile driving device can be a vibro hammer suspended by a crane.

[0025] Claim 6 In the present invention, the positioning template has a divided structure, and each divided positioning template is sunk to the bottom of the water in order and connected to each other. The division positioning template that is sunk first has a connecting direction member disposed on the lower side and a member perpendicular to the connecting direction member disposed on the upper side, forming a lattice structure; The divided positioning template that is sunk in the following manner has a cross structure in which a connecting direction member is arranged on the upper side and a member perpendicular to the connecting direction member is arranged on the lower side, The connecting direction member arranged on the lower side of the division positioning template which is sunk first and the connecting direction member arranged on the upper side of the division positioning template which is sunk second are stacked vertically and directly connected by bolts according to claims 1 to 5. 5 A method for managing the driving of underwater piles according to any one of the preceding claims is provided.

[0026] The above claims 6The described invention provides a method for improving the efficiency of workability when connecting divided positioning templates underwater when the positioning template is divided. That is, it enables labor saving by omitting the use of splice plates, and the divided positioning template that is sunk first has a lattice structure in which a connecting direction member is arranged on the lower side and a member perpendicular to it is arranged on the upper side, and the divided positioning template that is sunk later has a lattice structure in which a connecting direction member is arranged on the upper side and a member perpendicular to it is arranged on the lower side, and the connecting direction member arranged on the lower side of the divided positioning template that is sunk first and the connecting direction member arranged on the upper side of the divided positioning template that is sunk later are stacked vertically and directly connected by bolts. Since there is no need to handle the splice plates, it is possible to contribute to labor saving.

[0027] Claim 7 According to the present invention, a guide member for the subsequent division positioning template, which is placed on top of the first division positioning template, is provided at a connection portion of the first division positioning template. 6 A method for controlling the driving of the described underwater piles is provided.

[0028] The above claims 7 In the present invention described above, a guide member for the subsequent split positioning template that is installed on top of the first split positioning template is provided at the connection portion of the first split positioning template, thereby making it possible to reduce the labor required for the connection work. Effect of the Invention

[0029] As described above, according to the present invention, when a pile positioning template is submerged on the bottom of the water and underwater piles are driven, the piles are driven while preventing contact between the guide steel pipes provided on the positioning template and the steel pipe piles, thereby eliminating misalignment of the positioning template and enabling it to be easily removed after pile driving is completed.

[0030] In addition, the efficiency of the work when connecting the divided positioning templates underwater can be improved. [Brief description of the drawings]

[0031] [Figure 1] This is a construction procedure diagram (part 1) of the underwater structure (floodgate) 30. [Diagram 2] This is a construction procedure diagram (part 2) of the underwater structure (floodgate) 30. [Diagram 3] This is a construction procedure diagram (part 3) of the underwater structure (floodgate) 30. [Figure 4] This is a construction procedure diagram (part 4) of the underwater structure (floodgate) 30. [Diagram 5] 1 is an enlarged view of a steel pipe foundation connection portion of a water gate precast structure 33. FIG. [Figure 6] FIG. 2 is a diagram showing a construction procedure for the underwater pile according to the present invention. [Figure 7] FIG. 2 is an overall plan view of the positioning template 1. [Figure 8] FIG. 2 is a diagram showing a state in which the positioning template 1 is divided. [Figure 9] 1 is a side view showing a connecting portion of split positioning templates 2 and 3. FIG. [Figure 10] 4 is an enlarged view of a main portion of the installation portion of the guide steel pipe 13. FIG. [Figure 11] This is a procedure diagram (part 1) for driving underwater piles. [Figure 12] This is a procedure diagram for driving underwater piles (part 2). [Figure 13] This is a procedure diagram for driving underwater piles (part 3). [Figure 14] This is an enlarged plan view of the main parts of the above-water guide frame member 22. [Figure 15] 13 is a side view showing another mode of connection of the split positioning templates 2, 3. FIG. [Figure 16] 11 is a cross-sectional view showing the installation state of guide members 29, 29. FIG. [Figure 17] FIG. 1 is a diagram showing a conventional method for managing the installation of an underwater pile 51. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. [Construction of underwater structures] First, the construction procedure of the underwater structure (water gate) 30 will be described in detail with reference to Figs.

[0033] As shown in Figure 1, riprap 32 is dumped all over the seabed where underwater structures such as water gates 30 and dikes 31 will be constructed. After the riprap 32 is dumped, a diver goes down and uses the orange bucket of the diver's boat to smooth out the uneven surface of the top of the riprap 32. The state after the smoothing work is completed is shown in Figure 1.

[0034] 2, after removing and leveling the rubble 32 in the pile driving area according to the size of the sluice gate 30, a large number of underwater piles 8, 8 ... are driven into this area. The driving management of these underwater piles 8 is the subject of the present invention.

[0035] As shown in Figure 3, In order to protrude the underwater piles 8, 8... by a predetermined length from the top surface of the riprap 32 (the reference surface for installing the structure), each of the underwater piles 8, 8... is cut underwater by a method such as oxygen arc cutting or oxygen lance cutting. All of this cutting work is performed by experienced divers.

[0036] next, As shown in Figure 4, The precast water gate structure 33 constructed at a work yard such as a quay is transported by sea and then slowly sunk into a designated installation location. As shown in Figure 5, the bottom surface of the precast water gate structure 33 has mating recesses 34a formed in areas corresponding to the pile positions, and the structure is sunk so that the heads of all the underwater piles 8, 8... fit into the mating recesses 33a.

[0037] The diameter of the fitting recess 33a is the sum of the diameter (outer diameter) D of the underwater pile 8 and the gap 2L on both sides, where L is the pile driving performance management standard value.

[0038] Then, underwater concrete 34 is poured into the gap between the head of the underwater pile 8 and the fitting recess 33a to complete the work. Also, gravity-type embankments 31, 31 are constructed on both sides of the water gate 30. [Management of underwater pile installation] As shown in FIG. 6, the present invention is a method for managing the driving of steel pipe piles 8 toward the bottom of the water by a pile driving device 5 installed on the water. The method comprises the following steps: a first step of sinking a pile positioning template 1, which is made of steel materials assembled in a grid shape in a plan view and has a guide steel pipe 13 with a circular cross section at the pile driving position, into the bottom of the water; a second step of positioning the pile driving device 5 at a predetermined pile driving location and setting the steel pipe pile 8; a third step of electrically connecting the steel pipe pile 8 and the guide steel pipe 13 of the positioning template 1 via a power source 26 and a contact warning means 27; and a fourth step of driving the steel pipe pile 8 without contacting the guide steel pipe 13 while monitoring the warning from the contact warning means 27.

[0039] Further details will be described below with reference to the drawings.

[0040] <First Step> First, in the first step, a positioning template 1 made of steel materials assembled in a grid shape in plan view and having guide steel pipes 13 with circular cross sections provided at the pile driving positions is sunk into the water bottom.

[0041] The positioning template 1 is a device constructed by assembling steel materials in a grid shape in plan view, as shown in Fig. 7. H-shaped steel is used as the steel material constituting the positioning template, but the present invention is not limited to this and may be constructed using channel steel, I-shaped steel, square steel pipes, etc.

[0042] Since the illustrated positioning template 1 is a relatively large-scale structure, it is divided into divided positioning templates 2 to 4, which are sequentially sunk to the bottom of the water and connected to each other. Specifically, as shown in Fig. 8, the positioning template 1 is divided into three in the X direction.

[0043] The left-side division positioning template 2 has two leg members 10, 10 arranged along the Y direction at each end position in the X direction. A plurality of primary members 11, 11... ("connecting direction members" of the present invention) are arranged on the upper surface side of the leg members 10, 10 along the X direction and spaced apart in the Y direction. The primary members 11, 11... are arranged in pairs so as to straddle the pile driving position. And, on the upper surface side of the primary members 11, 11..., a plurality of secondary members 12, 12... ("members perpendicular to the connecting direction members" of the present invention) are arranged along the Y direction and spaced apart in the X direction (connecting direction). The secondary members 12, 12... are arranged in pairs so as to straddle the pile driving position.

[0044] The rectangular space surrounded by the pair of primary members 11, 11 and the pair of secondary members 12, 12 is the pile driving position, and a guide steel pipe 13 with a circular cross section is provided in each space. In the division positioning template 2 on the left end side, a total of 20 guide steel pipes 13 are provided in four rows of five pipes each.

[0045] As shown in Fig. 10, the guide steel pipe 13 is supported by support members 9, 9... provided between the primary member 11 and the secondary member 12. A steel pipe having an inner diameter (D+2L) obtained by adding twice the pile driving progress control standard value L to the diameter D of the underwater pile 8 is used as the guide steel pipe 13. The progress control standard value L is the allowable horizontal eccentricity of the underwater pile 8 during pile driving. The support members 9 are omitted in Figs. 7 and 8.

[0046] Similarly, the central division positioning template 3 has a plurality of primary members 11, 11... arranged along the X direction (connecting direction) and spaced apart in the Y direction on the upper surface side of the two leg members 10, 10 arranged along the Y direction at each end position in the X direction. The primary members 11, 11... are arranged in pairs so as to straddle the pile driving position. Then, on the upper surface side of the primary members 11, 11..., a plurality of secondary members 12, 12... are arranged along the Y direction and spaced apart in the X direction (connecting direction). These secondary members 12, 12... are arranged in pairs so as to straddle the pile driving position. The rectangular space surrounded by the pair of primary members 11, 11 and the pair of secondary members 12, 12 is the pile driving position, and a guide steel pipe 13 with a circular cross section is provided in each space. In the central division positioning template 3, a total of 16 guide steel pipes 13 are provided in an arrangement of 4 pipes x 4 rows.

[0047] Similarly, the right end division positioning template 4 has a plurality of primary members 11, 11... arranged along the X direction (connecting direction) and spaced apart in the Y direction on the upper surface side of the two leg members 10, 10 arranged along the Y direction at each end position in the X direction. The primary members 11, 11... are arranged in pairs so as to straddle the pile driving position. Then, on the upper surface side of the primary members 11, 11..., a plurality of secondary members 12, 12... are arranged along the Y direction and spaced apart in the X direction (connecting direction). These secondary members 12, 12... are arranged in pairs so as to straddle the pile driving position. The rectangular space surrounded by the pair of primary members 11, 11 and the pair of secondary members 12, 12 is the pile driving position, and a guide steel pipe 13 with a circular cross section is provided in each space. In the division positioning template 4 on the right end side, a total of 20 guide steel pipes 13 are provided in four rows of five pipes each.

[0048] As shown in Fig. 9, when the leg members 10, 10 are arranged adjacent to each other in parallel, the primary members 11, 11 are butted against each other. In the upper flanges of these primary members 11, 11, splice plates 14, 15 are hung across the top and bottom surfaces, respectively, and these members are fastened with bolts and nuts 16, 16.... In addition, in the webs of the primary members 11, 11, splice plates 17 are arranged on both sides, and these members are fastened with bolts and nuts 16, 16.... Furthermore, in the lower flanges, the lower flanges and the upper flanges of the leg members 10 are fastened with bolts and nuts 16, 16....

[0049] As shown in Fig. 7, at the left end in the X direction of the left-end division positioning template 2, three foundation parts 18 serving as a base are provided at intervals in the Y direction, and the leg members 10 are installed thereon. At the connecting portion between the left-end division positioning template 2 and the central division positioning template 3, three foundation parts 18 serving as a base are provided at intervals in the Y direction, and the leg members 10, 10 are installed adjacently thereon, and at the connecting portion between the central division positioning template 3 and the right-end division positioning template 4, three foundation parts 18 serving as a base are provided at intervals in the Y direction, and the leg members 10, 10 are installed adjacently thereon. At the right end in the X direction of the right-end division positioning template 4, three foundation parts 18 serving as a base are provided at intervals in the Y direction, and the leg members 10 are installed adjacently thereon.

[0050] When sinking and connecting these divided positioning templates 2 to 4, it is important to carry out underwater centering surveys and install them accurately and with high precision.

[0051] 11 and 12, the divided positioning templates 2 to 4 are sequentially submerged by a crane equipment 21 of a crane ship 20, and then connected underwater. The work of connecting the divided positioning templates 2 to 4 is performed by a diver.

[0052] Next, prior to the driving of the steel pipe piles 8, as shown in FIG. 13, a guide frame facility 22 is provided on the water, which serves both as a scaffold for welding the steel pipe piles and as a scaffold for positioning the steel pipe piles. As shown in FIG. 14, the guide frame facility 22 is constructed by driving H-shaped steel piles 23 with a vibro hammer 5 at four locations surrounding the driving locations of the multiple steel pipe piles 8, and then bridging the vertical and horizontal members 24, 24 across the H-shaped steel piles 23, 23, and bridging the long horizontal members 25, 25 across the vertical and horizontal members 24, 24. The guide frame facility 22 is configured to repeatedly install the multiple steel pipe piles 8 as one group. At this time, it is also possible to set the driving position of the piles by bridging the horizontal members 25, 25 as a guide to match the driving position of the steel pipe piles 8.

[0053] <Second Step> When the preparatory work up to this point is completed, in the second step, the pile driving device 5 (vibro hammer) is positioned at a predetermined pile driving location and a steel pipe pile 8 is set therein, as shown in Fig. 13. Specifically, the vibro hammer 5, which is the "pile driving device" of the present invention, is suspended by a crane facility 21, and at the same time, the steel pipe pile 8 is set vertically relative to the vibro hammer 5.

[0054] The positioning of the vibro hammer 5 at the pile driving location is performed using GNSS (GPS / GLONASS) to determine the position of the pile core. informationIt is preferable to use an existing pile driving management system that measures the distance between the pile and the pile driving device and guides the pile driving device to the driving position. This pile driving management system is available on the market under the product name "Pile Navi-V". Its outline is described in JP 2014-48635 A. Specifically, it is a method of driving steel materials for driving piles made of shaped steel based on position information obtained by GNSS, in which two GNSS receivers are provided at intervals in the chucking part of the driving device that grips the head of the pile, and the system obtains in real time the position of the pile in the three-dimensional coordinate system and the direction of rotation around the longitudinal axis of the pile from the difference in real time position information of the three-dimensional coordinate system of the two GNSS receivers, and overlays the image of the current position and direction of the pile obtained in real time on the image of the designed position and direction of the pile displayed on a monitor, and the operator of the driving device guides the pile to the designed position based on the image on the monitor. Details are given in the same publication.

[0055] In conjunction with the pile driving management system, it is desirable to measure the inclination of the steel pipe pile 8 using a total station (surveying equipment) 7 installed on a barge or on the ground.

[0056] <Third Step> Next, in the third step, as shown in FIG. 6, the steel pipe pile 8 and the guide steel pipe 13 of the positioning template 1 are electrically connected via a power source 26 and a contact warning means 27 in between.

[0057] That is, one end of an electric cable 28 is connected to the steel pipe pile 8 and the other end is connected to the guide steel pipe 13 via a power source 26 and contact warning means 27 in between, so that if the steel pipe pile 8 comes into contact with the guide steel pipe 13, electricity flows and the contact warning means 27 is activated to notify the operator of the contact. The contact warning means 27 can be, for example, a lamp and / or a buzzer.

[0058] <Fourth Step> In the fourth step, the steel pipe pile 8 is driven so as not to come into contact with the guide steel pipe 13 while monitoring the warning from the contact warning means 27.

[0059] By preventing the steel pipe piles 8 from coming into contact with the guide steel pipes 13, it becomes possible to prevent the positioning template 1 from being displaced horizontally due to a lateral force from the steel pipe piles 1. In addition, by driving all the steel pipe piles 8 with a margin without coming into contact with the guide steel pipes 13, it becomes possible to pull the positioning template 1 upward and remove it after driving of the steel pipe piles 8 is completed.

[0060] When positioning the steel pipe pile 8, it is desirable to install an underwater camera (not shown) that can visually view the steel pipe pile 8 and the guide steel pipe 13, and monitor the driving status. By monitoring with the underwater camera whether the steel pipe pile 8 is positioned inside the guide steel pipe 13, preferably at its center position, the positioning of the steel pipe pile 8 can be easily performed.

[0061] [Other examples] (1) In the above embodiment, the split positioning templates 2 to 4 are connected to each other using the splice plates 14, 15, and 17, but these splice plates may be omitted and the split positioning templates 2 to 4 may be directly connected to each other. In this case, it is possible to improve the efficiency of the connection work of the split positioning templates 2 to 4. This connection method will be described in detail below.

[0062] First, the order of sinking the division positioning templates 2 to 4 is preferably such that the central division positioning template 3 is first sinked, followed by the left division positioning template 2 and the right division positioning template 4. In this case, the central division positioning template 3 becomes the "first division positioning template to be sunk", and the left division positioning template 2 and the right division positioning template 4 become the "following division positioning templates to be sunk".

[0063] Regarding the vertical positioning relationship between the primary members 11 and the secondary members 12, the central division positioning template 3, which is first installed, has a lattice structure in which the primary members 11 (connecting direction members) along the X direction (connecting direction) are arranged on the lower side, and the secondary members 12 perpendicular to the primary members 11 are arranged on the upper side, as shown in Figure 15.

[0064] On the other hand, the left-side division positioning template 2 (and the right-side division positioning template 4) which is installed later has a lattice structure in which a secondary member 12 (connecting direction member) along the X direction (connecting direction) is arranged on the upper side, and a primary member 11 perpendicular to the secondary member 12 is arranged on the lower side, as shown in Figure 15.

[0065] Then, a connecting direction member (primary member 11) arranged on the lower side of the split positioning template 3 which is installed first and a connecting direction member (secondary member 12) arranged on the upper side of the split positioning template 2 which is installed subsequently are stacked one on top of the other and directly connected by bolts.

[0066] At this time, in order to accurately position the division positioning template 2 to be sunk later, it is desirable to provide a guide member 30 for regulating the position in the X direction in a plan view and guide members 29, 29 for regulating the position in the Y direction at the connection portion of the division positioning template 3 to be sunk earlier. In particular, the guide members 29, 29 for regulating the position in the Y direction are attached so as to be inclined outward as they go upward, as shown in Fig. 16, thereby facilitating the dropping operation and positioning of the division positioning template 2 to be sunk later.

[0067] (2) In the above embodiment, a vibro hammer suspended by a crane was used as the pile driving device. However, it is possible to apply the management method of the present invention to pile driving using a general three-point pile driver. [Explanation of symbols]

[0068] Reference Signs List 1... Positioning template, 2 to 4... Divided positioning template, 5... Pile driving device (vibro hammer), 6... Crane ship, 7... Total station (surveying equipment), 8... Steel pipe pile, 9... Support member, 10... Leg member, 11... Primary member, 12... Secondary member, 13... Guide steel pipe, 18... Foundation, 22... Guide frame equipment

Claims

1. A method for managing installation of steel pipe piles toward the bottom of a body of water using a pile driving device installed on the water, comprising: A first step is to sink a pile positioning template at the bottom of the water, the template being made of steel materials assembled in a grid shape in plan view, and each template is provided with a guide steel pipe having a circular cross section at the pile driving position, the guide steel pipe being made of a steel pipe having an inner diameter of a dimension (D+2L) obtained by adding twice the pile driving performance management standard value L to the diameter D of the steel pipe pile; A second step of positioning the pile driving device at a predetermined pile driving location and setting a steel pipe pile; A third step of electrically connecting the steel pipe pile and the guide steel pipe of the positioning template via a power source and a contact warning means; A method for managing the driving of underwater piles, comprising a fourth step of driving the steel pipe pile so as not to contact the guide steel pipe while monitoring the warning by the contact warning means.

2. 2. The method for managing driving of underwater piles according to claim 1, wherein the contact warning means is a lamp and / or a buzzer.

3. 3. A method for managing the driving of underwater piles according to claim 1, further comprising the step of installing an underwater camera capable of visually viewing the steel pipe pile and the guide steel pipe, and monitoring the driving status.

4. The method for managing underwater pile installation according to any one of claims 1 to 3, further comprising providing a guide frame facility on the water, the facility serving both as a scaffold for welding the steel pipe piles and as a scaffold for positioning the steel pipe piles.

5. The method for managing underwater pile driving as claimed in any one of claims 1 to 4, wherein the pile driving device is a vibro hammer suspended by a crane.

6. The positioning template has a divided structure, and each divided positioning template is sunk to the bottom of the water in order and connected to each other. The division positioning template that is sunk first has a connecting direction member disposed on the lower side and a member perpendicular to the connecting direction member disposed on the upper side, forming a lattice structure; The divided positioning template that is sunk in the following manner has a cross structure in which a connecting direction member is arranged on the upper side and a member perpendicular to the connecting direction member is arranged on the lower side, A method for managing the driving of underwater piles as described in any one of claims 1 to 5, in which a connecting direction member arranged on the lower side of the split positioning template that is sunk first and a connecting direction member arranged on the upper side of the split positioning template that is sunk subsequently are stacked one on top of the other and directly connected by bolts.

7. A method for managing the driving of underwater piles as described in claim 6, wherein a guide member for the subsequent divided positioning template which is installed on top of the first divided positioning template is provided at the connection portion of the first divided positioning template which is installed on top of the first divided positioning template.

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