Connection method and connection structure

Abstract

To provide a connection method of a batter pile to a precast superstructure which can effectively resist horizontal forces while reducing a diameter of a hole in a precast superstructure and can be easily constructed.SOLUTION: A connection structure connects a tubular batter pile 4 to a concrete precast superstructure 2. The precast superstructure 2 is provided with holes 24 inclined along the batter piles 4. When connecting the batter piles 4 and the precast superstructure 2, the following steps are carried out: step (a) of placing the precast superstructure 2 on top of the batter piles 4; step (b) of inserting a connecting pipe 13 having a slope following the batter piles 4 into the hole 24 and the inside of the upper end of the batter piles 4; and step (c) of filling the hole 24 and the inside of the upper end of the batter piles 4 with a filler material. Before step (a), a support material 14 is provided on an inner surface of the batter pile 4 to receive a lower end of the connecting pipe 13 while the connecting pipe 13 is inclined to match the batter pile 4, and in step (b), the lower end of the connecting pipe 13 is supported by the support material 14.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a method for connecting a batter pile to a precast superstructure. [Background technology]

[0002] Piers used for mooring ships, etc., have a structure in which the superstructure is supported by piles. By using batter piles as these piles, it is possible to effectively resist horizontal forces, and it is possible to omit the need to reinforce the piles with braces, etc.

[0003] The superstructure can be constructed by pouring concrete on-site, but this is strongly affected by meteorological and oceanographic conditions such as tides and waves, which poses the risk of delays in the project and impacts on quality and the environment. Furthermore, when renovating piers at private facilities currently in operation, the construction period can be lengthened, which could disrupt operational activities. For this reason, precast concrete superstructures, as in Patent Document 1, are sometimes used to shorten construction periods, streamline construction, improve quality, and ensure safety. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-152089 Summary of the Invention [Problem to be solved by the invention]

[0005] When constructing a pier using a precast superstructure, the precast superstructure is lowered vertically from above the previously cast piles and connected to the piles, but the problem here is the connection between the batter piles and the precast superstructure. Normally, holes are made in the precast superstructure to insert the piles, the size of which is approximately the pile diameter plus a construction error, but in the case of batter piles, the holes for inserting the piles must be larger because the piles are at an angle, and because the holes are larger, post-construction work such as reinforcement takes time.

[0006] On the other hand, in Patent Document 1, a curved connecting member is used to connect a batter pile to a precast superstructure, and the inclined part of the connecting member is inserted into the head of the batter pile and fixed, and then the vertical part of the connecting member is inserted into a hole in the precast superstructure and the hole is filled with a filler material. This allows the diameter of the hole in the precast superstructure to be reduced, even at the connection between the batter pile and the precast superstructure.

[0007] However, in Patent Document 1, the inclined portions of the batter piles and connecting members extend downward from near the underside of the precast superstructure. The effect of the batter piles is largely achieved by the truss structure formed by the batter piles and the precast superstructure, but if the inclined portions of the batter piles and connecting members are far from the center of the thickness of the precast superstructure, it is difficult to consider it a complete truss structure, and excess bending moment occurs at the pile head in response to horizontal force, reducing the effect of the batter piles.

[0008] Furthermore, in order to insert the inclined portion of the connecting member into the batter pile, the connecting member must be lowered diagonally, which requires construction work to prevent contact (collision) between the connecting member and the batter pile and to install the connecting member accurately.Furthermore, in order to securely fix the precast superstructure to the batter pile, it is necessary to ensure reliable stress transmission between the connecting member and the precast superstructure, and it is desirable that this work be easy to perform.

[0009] The present invention has been made in consideration of the above problems, and aims to provide a method for connecting a batter pile to a precast superstructure, which can effectively resist horizontal forces while reducing the diameter of the holes in the precast superstructure and is easy to install. [Means for solving the problem]

[0010] The first invention for solving the above-mentioned problems is a method for connecting a tubular batter pile to a concrete precast superstructure, comprising: a step (a) of placing the precast superstructure on top of a batter pile, a step (b) of inserting a connecting pipe, which is inclined to match the batter pile, into the hole and the inside of the upper end of the batter pile; and a step (c) of filling the hole and the inside of the upper end of the batter pile with filler material, wherein before step (a), a support material is provided on the inner surface of the batter pile to receive the lower end of the connecting pipe with the connecting pipe inclined to match the batter pile, and in step (b), the lower end of the connecting pipe is supported by the support material.

[0011] The second invention is a method for connecting a tubular batter pile to a concrete precast superstructure, the method comprising the steps of: a step (a) of placing the precast superstructure on top of a batter pile, the precast superstructure having a hole inclined to match the batter pile; a step (b) of inserting a connecting pipe inclined to match the batter pile into the hole and the inside of the upper end of the batter pile; and a step (c) of filling the hole and the inside of the upper end of the batter pile with filler material; and in step (b), a ballast jig is attached to the upper end of the connecting pipe, the connecting pipe and the ballast jig are lowered by a crane with the connecting pipe inclined to match the batter pile, and the connecting pipe is lowered along the slope of the batter pile and inserted into the hole and the inside of the upper end of the batter pile.

[0012] The third invention is a method for connecting a tubular batter pile to a concrete precast superstructure, comprising the steps of: a hole in the precast superstructure, the hole having an inclination that follows the batter pile; (a) placing the precast superstructure on top of the batter pile; a step (b) inserting a connecting pipe, the inclination following the batter pile, into the hole and the inside of the upper end of the batter pile; and a step (c) filling the hole and the inside of the upper end of the batter pile with filler; a sheath pipe is provided on the inner surface of the hole; a long hole is provided along the axial direction of the connecting pipe at a position lower than the upper end of the connecting pipe; and before step (c), the sheath pipe side end of a plate-shaped connecting material fitted into the long hole and expanding toward the central axis of the connecting pipe is fixed to the inner surface of the sheath pipe.

[0013] In the connection method of the present invention, a connecting pipe is inserted into a hole in the precast superstructure, which has a similar inclination to the batter pile, and a portion of the connecting pipe is buried inside the batter pile. The hole in the precast superstructure has a similar inclination to the batter pile, and the diameter can be slightly larger than that of the connecting pipe, so the diameter of the hole in the precast superstructure can be made smaller. Furthermore, because the inclination of the connecting pipe leading to the batter pile begins inside the precast superstructure, a highly reliable truss structure can be realized between the batter pile and the precast superstructure, and the batter pile can effectively resist horizontal forces.

[0014] In the first invention, the support material allows the connecting pipe to be stably held in a state where its inclination matches the inclination of the batter piles, facilitating construction. In the second invention, the use of a ballast jig makes it possible to hang and support the connecting pipe in a state where it is inclined to match the inclination of the batter piles, making it easier to insert the connecting pipe while preventing contact between the connecting pipe and the batter piles. In the third invention, a connecting plate allows the connecting pipe to be fixed to the superstructure to transmit stress. Furthermore, the wedge shape of the connecting plate and the long holes in the connecting pipe allow reliable stress transmission between the connecting pipe and the superstructure via the connecting plate without fixing the connecting plate to the connecting pipe, facilitating construction.

[0015] The receiving material includes a locking portion for locking the lower end of the connecting pipe, and before step (a), the receiving material is positioned by being hooked onto the upper end of the inclined pile by a hook provided at the upper end of the receiving material, and after the lower part of the locking portion of the receiving material is fixed with fill concrete poured into the inclined pile, the hook is desirably removed before step (a). The receiving material of the first invention can be easily placed inside the batter pile by the hook at the top end. After the receiving material is fixed with the fill concrete, the hook is removed so as not to interfere with subsequent work.

[0016] The connection structure is, for example, a connection structure between a batter pile and a precast superstructure in a pier at a port. This allows the holes in the precast superstructure of the pier to be made thinner, while the batter piles can effectively resist horizontal forces, and construction is also easy.

[0017] The fourth invention is a connection structure between a tubular batter pile and a concrete precast superstructure, characterized in that a hole having a slope that matches the batter pile is provided in the precast superstructure, the precast superstructure is placed on top of the batter pile, a connecting pipe having a slope that matches the batter pile is inserted into the hole and the inside of the upper end of the batter pile and filled with filling material, and a support material is provided on the inner surface of the batter pile to receive the lower end of the connecting pipe while the connecting pipe is inclined to match the batter pile. The fifth invention is a connection structure between a tubular batter pile and a concrete precast superstructure, characterized in that a hole with an inclination that follows the batter pile is provided in the precast superstructure, the precast superstructure is placed on top of the batter pile, a connecting pipe with an inclination that follows the batter pile is inserted into the hole and the inside of the upper end of the batter pile and filled with filling material, a sheath pipe is provided on the inner surface of the hole, a long hole is provided along the axial direction of the connecting pipe at a position lower than the upper end of the connecting pipe, and the sheath pipe side end of a plate-shaped connecting material that is fitted into the long hole and expands toward the central axis of the connecting pipe is fixed to the inner surface of the sheath pipe. The fourth and fifth inventions are connection structures formed by the connection methods of the first and third inventions, respectively. [Effects of the Invention]

[0018] The present invention provides a method for connecting a batter pile to a precast superstructure, which allows the diameter of the hole in the precast superstructure to be reduced while effectively resisting horizontal forces and is easy to install. [Brief explanation of the drawings]

[0019] [Figure 1] A diagram showing Pier 1. [Figure 2] A diagram showing the top surface of the precast superstructure 2. [Figure 3] FIG. 1 is a diagram showing a connection structure 10. [Figure 4] A diagram showing how the batter piles 4 and the precast superstructure 2 are connected. [Figure 5] A diagram showing how the batter piles 4 and the precast superstructure 2 are connected. [Figure 6] FIG. 2 is a diagram showing the upper end of the connecting pipe 13. [Figure 7] FIG. [Figure 8] 10A and 10B are diagrams showing the process of inserting the connecting pipe 13. [Figure 9] FIG. 2 is a diagram showing a connection structure 10a. [Figure 10] FIG. 2 is a diagram showing the upper end of the connecting pipe 13. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0021] (1. Pier 1) Fig. 1 is a diagram showing a pier 1 having a connection structure 10 according to an embodiment of the present invention, and shows a vertical cross section taken along line aa in Fig. 2, which will be described later. The pier 1 is a pier installed in the coastal area of ​​a port or the like, and is used for mooring ships, etc.

[0022] The pier 1 is constructed with a precast superstructure 2 supported by vertical piles 3 and batter piles 4 driven into the ground at the bottom of the water. The precast superstructure 2 is a concrete plate-like member placed on top of the vertical piles 3 and batter piles 4. The vertical piles 3 and batter piles 4 are tubular piles made of steel pipes. Note that the pier 1 is not limited to having both the vertical piles 3 and batter piles 4, and it may also have only the batter piles 4.

[0023] Figure 2 is a top view of the precast superstructure 2. The precast superstructure (hereinafter simply referred to as the superstructure) 2 has a rectangular planar shape. The superstructure 2 has beams 21 in the long side direction and beams 22 in the short side direction arranged in a grid pattern on the underside of the deck slab. The long side direction and short side direction of the superstructure 2 correspond to the up-down direction and left-right direction in Figure 2, respectively.

[0024] The vertical piles 3 and the batter piles 4 are connected to the superstructure 2 at the intersections of the beams 21 and 22. At the intersections where the batter piles 4 are connected, holes 24 are provided that pass through the intersections vertically. The batter piles 4 are connected using the holes 24, which are filled with a filler F made of a cement-based material such as mortar or concrete. Some of the batter piles 4 extend from the center of the superstructure 2 in the short side direction toward one end of the short side direction, and others extend toward the other end. A pair of holes 24 is provided corresponding to each of these pairs of batter piles 4.

[0025] (2. Connection structure 10) Fig. 3 is a diagram showing the connection structure 10, and is a vertical cross section taken along line bb in Fig. 2. As shown in Fig. 3, the connection structure 10 includes a sheath pipe 11, a temporary receiving pipe 12, a connecting pipe 13, a receiving member 14, etc.

[0026] The sheath pipes 11 are steel pipes arranged along the inner surfaces of the holes 24 in the precast superstructure 2, and are provided in each of the pair of holes 24. The holes 24 have an inclination that follows the inclination of the batter piles 4, and the sheath pipes 11 also have a similar inclination. Two flange-shaped plates 111 are provided around the sheath pipe 11, one above the other. These plates 111 are embedded in the concrete of the superstructure 2. The main reinforcement 23 of the superstructure 2 is fixed to the plates 111 by welding or the like. It is also possible to fix the main reinforcement 23 directly to the outer surface of the sheath pipe 11.

[0027] The temporary support pipe 12 is a steel pipe fitted onto the upper end of the batter pile 4, and has an inclination that follows the inclination of the batter pile 4. A flange 121, which is an annular horizontal plate, is provided at the upper end of the temporary support pipe 12 along the circumferential direction of the temporary support pipe 12. The upper surface of the flange 121 abuts against the underside of the periphery of the hole 24 of the superstructure 2, and the inner edge of the flange 121 protrudes inside the hole 24. In the figure, reference numeral 122 denotes a rib for reinforcing the flange 121, and is fixed to the underside of the flange 121 and the outer surface of the temporary support pipe 12 by welding or the like. Multiple ribs 122 are provided at intervals around the circumferential direction of the temporary support pipe 12.

[0028] A horizontal plate 123 that protrudes inward of the temporary support pipe 12 is provided on the inner surface of the temporary support pipe 12, and the upper ends of the batter piles 4 are fixed to the underside of the plate 123 by welding or the like. A plurality of plates 123 are provided at intervals around the circumferential direction of the temporary support pipe 12. In the figure, reference numeral 124 denotes a rib for reinforcing each plate 123, and is fixed to the upper surface of the plate 123 and the inner surface of the temporary support pipe 12 by welding or the like.

[0029] The connecting pipe 13 is a steel pipe that is inserted into the hole 24 (sheath pipe 11) and the inside of the upper end of the batter pile 4. The connecting pipe 13 has a slope that follows the slope of the batter pile 4. A slit (see Figure 6 described later) is provided at the upper end of the connecting pipe 13, and a shim plate 112 fixed to the inner surface of the sheath pipe 11 by welding or the like is inserted into the slit.

[0030] The shim plate 112 is a plate-like member arranged with its plate surface in the vertical direction, and is made of a steel plate. The shim plate 112 is fixed to the slit by welding or the like, and functions as a connecting member that connects the upper end of the connecting pipe 13 to the inner surface of the sheath pipe 11, and resists the pushing force or pulling force generated in the batter pile 4.

[0031] The receiving member 14 is a member for receiving the lower end of the connecting pipe 13 while the inclination of the connecting pipe 13 is aligned with the inclination of the batter pile 4. The receiving member 14 has a locking portion 141, a cage body 142, a bottom plate 143, etc.

[0032] The locking portion 141 is used to lock the lower end of the connecting pipe 13. In this embodiment, a rebar is used as the locking portion 141, which is installed in the axial direction of the batter pile 4 along the inner surface of the batter pile 4, and its lower end is bent inward by 90° to form an L-shaped hook.

[0033] The cage body 142 has vertical reinforcements 1421 and horizontal reinforcements 1422. The vertical reinforcements 1421 are provided along the inner surface of the diagonal pile 4 in the axial direction of the diagonal pile 4. The horizontal reinforcements 1422 are provided along the inner surface of the diagonal pile 4 in the circumferential direction of the diagonal pile 4. A plurality of vertical reinforcements 1421 (four in this embodiment) are provided at equal intervals around the circumferential direction of the diagonal pile 4, and the horizontal reinforcements 1422 are arranged in multiple rows at intervals in the axial direction of the diagonal pile 4. However, the number and arrangement of the vertical reinforcements 1421 and horizontal reinforcements 1422 are not particularly limited.

[0034] The locking portions 141 are fixed by welding or the like to the middle of the longitudinal direction of each vertical reinforcement 1421. In this embodiment, as shown in Fig. 3, the bent portions of a pair of locking portions 141 arranged on both radial sides of the batter pile 4 in a vertical plane along the axial direction of the batter pile 4 are arranged at the same position in the axial direction of the batter pile 4. This allows the lower end of the connecting pipe 13, which is formed in a direction perpendicular to the axial direction of the batter pile 4 in the vertical plane, to be locked by the pair of locking portions 141, and the inclination of the connecting pipe 13 can be kept aligned with the inclination of the batter pile 4. However, the arrangement of the locking portions 141 is not limited to this and may vary depending on the shape of the lower end of the connecting pipe 13, etc.

[0035] A bottom plate 143 is provided at the bottom of the cage body 142. Above the bottom plate 143, filler concrete Con is filled up to a height slightly below the engaging part 141. The filler concrete Con prevents damage to the batter piles 4 due to collisions with floating objects on the water. Above the filler concrete Con, the holes 24 in the superstructure 2 and the inside of the upper ends of the batter piles 4 are filled with the filler material F.

[0036] The above has been described regarding one of the inclined piles 4 extending toward both ends of the superstructure 2 in the short side direction, but the other inclined pile 4 is also connected to the superstructure 2 by a connection structure 10 similar to that shown in Figure 3.

[0037] (3. Connection method between the batter pile 4 and the superstructure 2) 4 and 5 are diagrams illustrating a method for connecting the batter piles 4 and the superstructure 2. In this embodiment, first, as shown in FIG. 4(a), a support member 14 is installed on the upper end of the batter pile 4 that has been previously installed. At this stage, an outward-facing hook 1423 is provided on the upper end of the vertical reinforcement 1421 of the cage body 142. The support member 14 is positioned along the inner surface of the batter pile 4 with the hook 1423 at its upper end hooked onto the upper end of the steel pipe of the batter pile 4.

[0038] Thereafter, as shown in Figure 4(b), filler concrete Con is poured onto the bottom plate 143 of the receiving material 14. The filler concrete Con is filled up to a height slightly below the engaging part 141, and as the filler concrete Con hardens, the part of the receiving material 14 below the engaging part 141 is fixed. Then, the hooks 1423 are cut and removed.

[0039] Next, as shown in Figure 4(c), a temporary support pipe 12 is installed on top of the batter pile 4. The temporary support pipe 12 is fitted onto the upper end of the batter pile 4, and the upper end of the steel pipe of the batter pile 4 is fixed to the plate 123 on the inner surface of the temporary support pipe 12 by welding or the like.

[0040] Thereafter, the superstructure 2 is lowered from above the batter piles 4 and lowered vertically downward, and placed on the flange 121 of the temporary support pipe 12 as shown in Figure 5(a). At this time, the flange 121 abuts against the underside of the hole 24 of the superstructure 2.

[0041] Then, as shown in Figure 5(b), the connecting pipe 13 is inserted into the hole 24 of the superstructure 2 and into the inside of the upper end of the batter pile 4. The lower part of the connecting pipe 13 is placed inside the upper end of the batter pile 4, and the lower end of the connecting pipe 13 is locked by the locking part 141, so that the inclined posture of the connecting pipe 13 along the slope of the batter pile 4 is maintained.

[0042] In addition, the shim plate 112 is fixed to the inner surface of the sheath pipe 11 and the slit of the connecting pipe 13 by welding or the like. As a result, the connecting pipe 13 is fixed in the hole 24 of the superstructure 2.

[0043] 6(a) and (b) show the upper end of the connecting pipe 13, with Fig. 6(a) showing the state before the installation of the shim plate 112 and Fig. 6(b) showing the state after the installation of the shim plate 112. Note that the plate 111 of the sheath pipe 11 and the superstructure 2 are not shown in Figs. 6(a) and (b).

[0044] A plurality of slits 131 are provided at intervals in the circumferential direction of the connecting pipe 13, and in this embodiment, eight slits 131 are formed at equal intervals at the upper end of the connecting pipe 13. These slits 131 are provided so as to extend downward from the upper end of the connecting pipe 13 along the axial direction of the connecting pipe 13.

[0045] A plurality of shim plates 112 are also provided at intervals around the circumferential direction of the sheath pipe 11, corresponding to the positions of the slits 131. The shim plates 112 can be welded to the slits 131 at any position within the shim plate 112, and because they are retrofitted, they can accommodate slight deviations in the position or angle of the connecting pipe 13 and absorb installation errors of the batter piles 4, superstructure 2, etc. Furthermore, welding of the shim plates 112 can be performed within reach from the top surface of the superstructure 2, making the work easy.

[0046] After this, as shown in Figure 3, filler material F is filled inside the holes 24 in the superstructure 2 and the upper ends of the batter piles 4. The flanges 121 of the temporary support pipes 12 also function as the bottom formwork when filling with filler material F, reducing the work required to set up the formwork. Filler material F is also filled inside the temporary support pipes 12, and when the temporary support pipes 12 are installed (see Figure 4(c)), a sealing material (not shown) such as filler is also provided to close the bottom end of the gap between the temporary support pipes 12 and the batter piles 4.

[0047] The above steps form the connection structure 10 shown in Figure 3. In this embodiment, the superstructure 2 is made of precast members, which makes it possible to shorten the construction period and streamline construction, and since almost all of the processes after the installation of the superstructure 2 can be carried out by work on the top surface of the superstructure 2, intertidal work below the superstructure 2 is reduced and construction is easier.

[0048] As described above, in this embodiment, the connecting pipe 13 is inserted into the hole 24 provided in the superstructure 2, which has the same inclination as the batter pile 4, and a part of it is buried inside the batter pile 4. The hole 24 in the superstructure 2 has the same inclination as the batter pile 4, and only needs to have a diameter slightly larger than that of the connecting pipe 13, so the diameter of the hole 24 in the superstructure 2 can be made smaller. Furthermore, because the inclination of the connecting pipe 13 leading to the batter pile 4 begins inside the superstructure 2, a highly complete truss structure can be realized between the batter pile 4 and the superstructure 2, and the batter pile 4 can effectively resist horizontal forces.

[0049] In this embodiment, the support member 14 allows the inclination of the connecting pipe 13 to be stably maintained in accordance with the inclination of the batter pile 4, facilitating construction. Furthermore, the height of the connecting pipe 13 is easy to manage. The support member 14 can be easily placed inside the batter pile 4 using the hook 1423 at its upper end. After the support member 14 is fixed with the filling concrete Con, the hook 1423 is removed so as not to interfere with subsequent work.

[0050] In addition, the connection structure 10 of this embodiment is a connection structure between a batter pile 4 and a superstructure 2 at a pier 1 in a port, and at the pier 1, the hole 24 in the superstructure 2 can be made narrower in diameter while the batter pile 4 can be made to effectively resist horizontal forces, and construction is also easy.

[0051] However, the present invention is not limited to the above-described embodiments. For example, in this embodiment, the connection structure 10 is applied to the pier 1 of a port, but the application of the connection structure 10 is not limited to this.

[0052] Furthermore, the configuration of the temporary support pipe 12 is not limited to the above. For example, instead of fixing the plate 123 of the temporary support pipe 12 to the upper end of the steel pipe of the batter pile 4 by welding or the like, it is also possible to fix the temporary support pipe 12 by inserting a wedge-shaped metal piece between the temporary support pipe 12 and the steel pipe of the batter pile 4.

[0053] Next, second and third embodiments will be described as other examples that facilitate the installation of the connecting pipe 13. The second and third embodiments will be described by focusing on differences from the first embodiment, and similar points will be denoted by the same reference numerals in the drawings, etc., and description thereof will be omitted.

[0054] [Second embodiment] In the second embodiment, as shown in Figures 7(a) and (b), a ballast jig 5 is attached to the upper end of the connecting pipe 13, and the connecting pipe 13 is tilted to match the inclination of the batter pile 4.Then, the connecting pipe 13 is lowered using a crane or the like, and the connecting pipe 13 is inserted into the hole 24 in the superstructure 2 and the upper end of the batter pile 4.

[0055] 7(a) is a view of the ballast jig 5 attached to the connecting pipe 13 as seen from the side of the connecting pipe 13, and FIG. 7(b) is a view of FIG. 7(a) as seen from the direction indicated by arrow A. FIG.

[0056] The ballast jig 5 has an upper jig portion 51 and a lower jig portion 52 , and is attached to the upper end of the connecting pipe 13 by an attachment portion 53 provided on the lower jig portion 52 .

[0057] The jig upper part 51 is a steel member arranged to extend from the upper end of the connecting pipe 13 to the opposite side of the lower end of the connecting pipe 13 (corresponding to the left side of FIG. 7(a)) in a plan view. Hereinafter, the lower end side of the connecting pipe 13 (corresponding to the right side of FIG. 7(a)) when viewed from the upper end of the connecting pipe 13 in a plan view may be referred to as the "front (forward)", and the opposite side may be referred to as the "rear (rearward)". In addition, the left-right direction in FIG. 7(a) may be referred to as the "front-rear direction" hereinafter.

[0058] The lower jig member 52 is a steel member shorter than the upper jig member 51, and is attached to the underside of the front end of the upper jig member 51 in plan view.

[0059] In this embodiment, H-shaped steel is used for the upper jig 51 and the lower jig 52. The H-shaped steel is arranged with both flanges facing up and down. In this embodiment, the lower jig 52 is attached by fixing the flanges of the upper jig 51 and the lower jig 52 together with a fixing device 54 such as a bullman.

[0060] A horizontal plate 521 extending in the front-rear direction is provided on the lower surface of the jig lower part 52. A pair of mounting parts 53 are provided on the front and rear of the lower surface of the horizontal plate 521. The mounting parts 53 are plate-shaped members and are arranged along the front-rear direction with their plate surfaces oriented vertically. The mounting parts 53 are made of a steel plate or the like.

[0061] The mounting portion 53 is inserted from above into the slit 131 of the connecting pipe 13. The lower portion of the mounting portion 53 is forked, and a notch 531 is provided from the lower end of the mounting portion 53 upward. When the pipe wall portion of the connecting pipe 13 below the slit 131 is inserted into the notch 531, the pipe wall portion of the connecting pipe 13 is sandwiched between both sides of the notch 531 at the lower portion of the mounting portion 53. When the front and rear mounting portions 53 are inserted into the slit 131 and the pipe wall portion of the connecting pipe 13 below the slit 131 is sandwiched between the lower portions of the mounting portions 53, the planar position of the ballast jig 5 is fixed with respect to the connecting pipe 13, and the ballast jig 5 is attached to the upper end of the connecting pipe 13.

[0062] By attaching the ballast jig 5 to the upper end of the connecting pipe 13, the center of gravity G' of the entire structure is shifted rearward relative to the center of gravity G of the connecting pipe 13 alone. By suspending the connecting pipe 13 and the ballast jig 5 from the center of gravity G' using a suspender 6, the connecting pipe 13 can be stably suspended and supported in an inclined state. In this embodiment, an inverted L-shaped protrusion 132 is provided on the inner surface of the connecting pipe 13 at the center of gravity G'. The connecting pipe 13 and the ballast jig 5 are suspended and supported by a crane or the like using the suspender 6 attached to this protrusion 132. In some cases, the protrusion 132 may be provided on the outer surface of the connecting pipe 13. The shape, weight, etc. of the ballast jig 5 are determined so that the inclination of the connecting pipe 13 during suspension support corresponds to the inclination of the batter pile 4. Reference numeral 511 in FIG. 7(a) indicates the area where a weight is attached to the rear end of the H-shaped steel of the jig upper part 51 for weight adjustment.

[0063] When installing the connecting pipe 13, as shown by arrow B in Figure 8, the connecting pipe 13 and ballast jig 5, which are suspended and supported in the state shown in Figure 7(a), are lowered along the slope of the batter pile 4 by operating a crane or the like. This allows the connecting pipe 13 to be inserted from above into the hole 24 in the superstructure 2 and into the inside of the upper end of the batter pile 4. After the connecting pipe 13 is inserted, the ballast jig 5 can be easily removed above the connecting pipe 13.

[0064] In this embodiment, by using the ballast jig 5, it is possible to hang and support the connecting pipe 13 in a state where it is inclined to match the inclination of the inclined pile 4, making it easier to insert the connecting pipe 13 while preventing contact between the connecting pipe 13 and the inclined pile 4.

[0065] [Third embodiment] In the third embodiment, as shown in a connection structure 10a in Fig. 9, a plate-shaped shim plate 112a (connecting member) that widens toward the central axis C of the connection pipe 13 is used to connect the upper end of the connection pipe 13 to the inner surface of the sleeve pipe 11. The end of the shim plate 112a on the sleeve pipe 11 side is fixed by welding to the inner surface of the sleeve pipe 11. Note that the end of the shim plate 112a on the sleeve pipe 11 side can also be fixed to the inner surface of the sleeve pipe 11 using a bolt or the like.

[0066] 10 , in the upper end portion of the connecting pipe 13, a long hole 131a for inserting a shim plate 112a is provided midway in the axial direction of the connecting pipe 13. A plurality of long holes 131a are provided at intervals in the circumferential direction of the connecting pipe 13. In the present embodiment, eight long holes 131a are formed at equal intervals in the upper end portion of the connecting pipe 13. These long holes 131a are provided so as to extend downward along the axial direction of the connecting pipe 13 from a position slightly lower than the upper end of the connecting pipe 13.

[0067] A plurality of shim plates 112a are also provided at intervals around the circumferential direction of the sheath pipe 11, corresponding to the positions of the elongated holes 131a. However, in this embodiment, the shim plates 112a are widened in a wedge shape. Therefore, by fitting the shim plates 112a into the elongated holes 131a, the connecting pipe 13 can be fixed by the shim plates 112a without welding the shim plates 112a to the connecting pipe 13. When constructing the connecting pipe 13, for example, after inserting the connecting pipe 13 into the hole 24 of the superstructure 2 and the upper end of the batter pile 4, the shim plates 112a are fitted into the elongated holes 131a from inside the connecting pipe 13, and the end of the shim plate 112a on the sheath pipe 11 side is fixed to the inner surface of the sheath pipe 11 by welding or the like. The filler F is then filled.

[0068] In this embodiment, stress can be transmitted by fixing the connecting pipe 13 to the superstructure 2 using the shim plate 112a. Furthermore, the wedge shape of the shim plate 112a and the long hole 131a of the connecting pipe 13 make it possible to transmit stress between the connecting pipe 13 and the superstructure 2 via the shim plate 112a without fixing the shim plate 112a to the connecting pipe 13 as in the first embodiment, making construction easier.

[0069] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications or alterations within the scope of the technical ideas disclosed herein, and it is understood that these modifications also fall within the technical scope of the present invention. [Explanation of symbols]

[0070] 1: Pier 2: Precast superstructure 4: Inclined stake 5: Ballast jig 6: Hanging material 10, 10a: Connection structure 11: Sheath tube 12: Temporary support pipe 13: Connecting pipe 14: Support material 24: Hole 51: Upper part of jig 52: Lower part of jig 53: Mounting part 112, 112a: Shim plate 131: Slit 131a: Long hole 132:Protruding piece 141: Locking part 142: Cage body 143: Bottom plate 1423: Hook

Claims

1. A method of connecting a tubular batter pile to a concrete precast superstructure, comprising: The precast superstructure is provided with holes having an inclination along the batter piles, (a) placing the precast superstructure on the batter piles; Step (b) of inserting a connecting pipe having an inclination along the baffle into the hole and the inside of the upper end of the baffle; (c) filling the inside of the hole and the upper end of the batter pile with a filler; and Before the step (a), a receiving member is provided on the inner surface of the baffle pile to receive the lower end of the connecting pipe in a state in which the connecting pipe is inclined to the baffle pile, A connecting method characterized in that in the step (b), the lower end of the connecting pipe is supported by the receiving member.

2. A method of connecting a tubular batter pile to a concrete precast superstructure, comprising: The precast superstructure is provided with holes having an inclination along the batter piles, (a) placing the precast superstructure on the batter piles; Step (b) of inserting a connecting pipe having an inclination along the baffle into the hole and the inside of the upper end of the baffle; (c) filling the inside of the hole and the upper end of the batter pile with a filler; and A connection method characterized in that in step (b), a ballast jig is attached to the upper end of the connecting pipe, the connecting pipe is inclined along the batter pile, and the connecting pipe and the ballast jig are lowered by a crane, and the connecting pipe is lowered along the inclination of the batter pile and inserted into the hole and inside the upper end of the batter pile.

3. A method of connecting a tubular batter pile to a concrete precast superstructure, comprising: The precast superstructure is provided with holes having an inclination along the batter piles, (a) placing the precast superstructure on the batter piles; Step (b) of inserting a connecting pipe having an inclination along the baffle into the hole and the inside of the upper end of the baffle; (c) filling the inside of the hole and the upper end of the batter pile with a filler; and a sheath tube is provided on the inner surface of the hole; a long hole is provided along the axial direction of the connecting pipe at a position lower than the upper end of the connecting pipe; a connecting method characterized in that, before step (c), an end portion of the sheath pipe side of a plate-shaped connecting material that is fitted into the long hole and expands toward the central axis side of the connecting pipe is fixed to an inner surface of the sheath pipe.

4. the receiving member includes a locking portion that locks the lower end of the connecting pipe, Before the step (a), the receiving material is hooked onto the upper end of the batter pile by a hook provided at the upper end of the receiving material, 2. A connection method as described in claim 1, characterized in that the hook is removed before step (a) after the lower part of the engaging portion of the receiving material is fixed with fill concrete poured into the batter pile.

5. 4. The connection structure according to claim 1, wherein the connection structure is a connection structure between a batter pile and a precast superstructure in a pier at a port.

6. A connection structure between a tubular batter pile and a concrete precast superstructure, The precast superstructure is provided with holes having an inclination along the batter piles, The precast superstructure is placed on the batter piles, A connecting pipe having an inclination along the baffle is inserted into the hole and the inside of the upper end of the baffle and filled with a filler material; A connection structure characterized in that a support material is provided on the inner surface of the batter pile to receive the lower end of the connecting pipe when the connecting pipe is inclined to match the batter pile.

7. A connection structure between a tubular batter pile and a concrete precast superstructure, The precast superstructure is provided with holes having an inclination along the batter piles, The precast superstructure is placed on the batter piles, A connecting pipe having an inclination along the baffle is inserted into the hole and the inside of the upper end of the baffle and filled with a filler material; A sheath tube is provided on the inner surface of the hole, a long hole is provided along the axial direction of the connecting pipe at a position lower than the upper end of the connecting pipe; A connection structure characterized in that the end of a plate-shaped connecting material fitted into the long hole and expanding toward the central axis of the connecting pipe, on the sheath pipe side, is fixed to the inner surface of the sheath pipe.

Images