Pile cap

Abstract

To provide a pile head cap which saves labor in fixing a support pile to the pile head and enables visual confirmation of the fixing state inside the pile head cap. [Solution] The cap comprises a cylindrical cap body 20, a top plate 30, and multiple fixed comb plates 50. The cap body 20 has multiple hook-shaped holes 21 and a mounting bracket 22. The multiple comb tooth pieces 52 of the fixed comb plate 50 inserted into the multiple hook-shaped holes 21 are pressed against multiple points on the outer peripheral surface of the pile head of the support pile 60, and the overlapping portions of the mounting bracket 22 and the fixed comb plate 50 are fastened with mounting bolts 54.

Description

[Technical Field]

[0001] The present invention relates to a pile cap that is installed on the head of a support pile of a bridge structure such as a temporary bridge or a permanent bridge. [Background technology]

[0002] When carrying out construction or repair work on roads, etc., temporary piers are sometimes constructed on the side of the road as passageways and waiting areas for personnel and vehicles. The substructure of the temporary bridge uses steel pipes as support piles. The heads of the support piles are driven into the ground on site and cut to a specified height to process the pile heads. After that, support girders are placed on the tops of the support piles and fixed in place.

[0003] When placing and fixing a support girder on the head of a support pile, construction errors may occur in the support pile. As a means for adjusting construction errors of support piles, it is known to use pile head caps as described in Patent Document 1 to adjust the position of the support girders. A conventional pile cap has a cylindrical cap body, a top plate fixed to the top of the cap body, and a plurality of fixing bolts that penetrate the outer periphery of the cap body and are screwed into it. A pile head cap is placed on the top of the support pile, and the mounting position of the pile head cap relative to the support pile is corrected by appropriately adjusting the tightening length of each fixing bolt when tightening each fixing bolt threaded onto the outer periphery of the cap body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3240959 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional pile caps have the following problems: <1> There are eight fixing bolts arranged circumferentially around the cap body, with at least two or more rows spaced apart in the vertical direction, and at least 16 or more fixing bolts must be tightened individually, making the operation of tightening a large number of fixing bolts very time-consuming and labor-intensive. <2> The fixing bolts are easily loosened by vibration, etc. If the fixing bolts loosen, the pile cap may be able to freely displace relative to the supporting pile, which may adversely affect the support girders mounted on the pile cap. <3> After a specific fixing bolt has been tightened, the tightening of other fixing bolts may cause the tip of the specific bolt to separate from the outer peripheral surface of the cap body and become loose. With conventional pile caps, the cap body is attached to the support pile, so it is not possible to visually check the fastening condition (contact condition) between the tip of each fixing bolt and the outer surface of the support pile. Therefore, all the fixing bolts must be repeatedly tightened.

[0006] The present invention has been developed in consideration of the above points, and its object is to provide a pile head cap that reduces the labor required to fix a support pile to the pile head and allows the fixing status inside the pile head cap to be visually confirmed. [Means for solving the problem]

[0007] The present invention provides a pile head cap comprising a cylindrical cap body that can be fitted onto the head of a support pile, a top plate that is fixed to the top of the cap body, and a plurality of fixed comb plates that are installed in the axial direction of the cap body and arranged radially at intervals around the circumferential direction of the cap body, wherein the cap body has a plurality of hook-shaped holes formed at intervals along its circumferential and vertical directions, and a mounting bracket that is erected radially from the cap body near the hook-shaped holes, and the fixed comb plate has a bridging portion that has a total length that can be arranged across the plurality of hook-shaped holes formed in the axial direction of the cap body, and a plurality of comb tooth pieces that protrude horizontally at intervals on one side of the bridging portion, and is configured so that the overlapping portions of the mounting bracket and the fixed comb plate are fastened and fixed with mounting bolts, with the plurality of comb tooth pieces of the fixed comb plate inserted into the plurality of hook-shaped holes being pressed against a plurality of points on the outer peripheral surface of the head of the support pile. In another embodiment of the present invention, the plurality of comb-tooth pieces of the fixed comb plate are slidably inserted into a plurality of hook-shaped holes formed in the axial direction of the cap body and tiltably inserted in the front-rear direction. In another form of the present invention, the hook-shaped hole has an insertion hole portion formed intermittently along the axial direction of the cap body, and a window hole portion opened in communication with the insertion hole portion, and the inside of the cap body is configured to be visible through the window hole portion. In another embodiment of the present invention, the planar shape of the hook-shaped hole is an inverted L-shape, an inverted L-shape, or a sideways T-shape. In another aspect of the present invention, the bolt holes of either the fixed comb plate or the mounting bracket are circular holes, and the bolt holes of the other of the fixed comb plate or the mounting bracket are elongated holes. In another embodiment of the present invention, the fixed comb plate and the mounting bracket may be fastened together at their overlapping portions with mounting bolts, thick, large-diameter washers, and nuts. In another embodiment of the present invention, a torsion-type high-strength bolt may be used as the mounting bolt. In another embodiment of the present invention, the mounting bracket is a plate having a total length that allows it to be disposed across a plurality of hook-shaped holes formed in the axial direction of the cap body. In another form of the present invention, the cap body is provided with a plurality of adjustment bolts radially threaded onto the cap body, and the plurality of adjustment bolts, which have the function of adjusting the position of the pile head cap relative to the support pile, are located below the plurality of fixed comb plates. [Effects of the Invention]

[0008] The present invention has at least one of the following advantages. <1> Since multiple points on the outer surface of the support pile can be supported simultaneously through multiple comb tooth pieces protruding from the fixed comb plate, the work of fixing the pile head cap to the support pile can be carried out efficiently in a short amount of time, which greatly contributes to labor savings and solving the problem of labor shortages. <2> Through the window hole formed in communication with the hook-shaped hole, the contact state between the tip of each comb tooth piece and the support pile inside the pile head cap can be visually and accurately grasped. Therefore, there is no problem of improper installation of the pile cap. <3> Even when the upper and lower peripheral distances between the support pile and the cap body are different, the protruding length of the multiple comb tooth pieces of the fixed comb plate toward the support pile can be easily adjusted by a simple operation of simply tilting the fixed comb plate in the forward and backward directions. <4> The fixed comb plate can be firmly fixed to the mounting bracket by frictional resistance at the joint surface between the fixed comb plate and the mounting bracket, which are fastened with the mounting bolts. Therefore, the problem of loosening of the fixed comb plates is unlikely to occur, and the fixing function of the multiple fixed comb plates can be guaranteed for a long period of time. <5> The plurality of comb tooth pieces can transmit loads through the bridge portions. Therefore, the multiple comb tooth pieces can be pressed evenly against the outer peripheral surface of the support pile. <6> When connecting the mounting bracket and the fixed comb plate with bolts, by using a thick, large-diameter washer, the fixed comb plate can be firmly fixed while allowing sliding and tilting. <7> When a torsion-type high-strength bolt is used for the mounting bolt, torque control of the mounting bolt becomes easy, and the friction resistance between the joint surfaces of all the fixed comb plates and the mounting bracket can be set appropriately. Therefore, it is possible to eliminate variations in the fixing force caused by a plurality of fixed comb plates. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a pile cap according to the present invention; [Figure 2] Perspective view of a partially disassembled pile cap [Figure 3] An explanatory diagram of a hook hole. (A) is a plan view of an L-shaped hook hole, (B) is a plan view of an inverted L-shaped hook hole, and (C) is a plan view of a horizontal T-shaped hook hole. [Figure 4] Bottom view of the cap body showing an example of how to install the adjustment bolt [Figure 5] Enlarged longitudinal cross section of the pile cap showing the mounting structure of the adjustment bolt [Figure 6] A bottom view of the cap body showing an example of installation of the fixed comb plate. [Figure 7] Enlarged longitudinal cross section of the pile cap showing the mounting structure of the fixed comb plate DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] <1> Pile cap Referring to Figures 1 and 2, the pile head cap 10 is placed over and fixed to the head of a support pile 60 driven into the ground, and after adjusting the position of the head of the support pile 60, it is used to place girders, etc. of a temporary or permanent bridge on the pile head cap 10.

[0012] The pile head cap 10 exemplified in this invention comprises a cylindrical cap body 20 that can be fitted onto a support pile 60, a top plate 30 that is fixed integrally to the upper part of the cap body 20, a plurality of reinforcing ribs 40 provided at the corners between the bottom surface of the top plate 30 and the outer peripheral surface of the cap body 20, and a plurality of fixing comb plates 50 that penetrate the outer peripheral surface of the cap body 20 and are able to move back and forth, and are pressed against multiple points on the outer peripheral surface of the support pile 60 to fix the pile head cap 10 to the pile head of the support pile 60. Each part will be described in detail below.

[0013] <2> Cap body The cap body 20 is a cylindrical body made of a steel pipe into which the support pile 60 is inserted, and has a larger diameter than the support pile 60 . The difference in diameter between the cap body 20 and the support pile 60 is the adjustment margin for the pile head cap 10, so the diameter of the cap body 20 is selected appropriately taking the adjustment margin into consideration.

[0014] The cap body 20 has a plurality of hook-shaped holes 21 arranged at intervals along the circumferential and axial directions of its peripheral surface, a mounting bracket 22 erected on one side of each hook-shaped hole 21, and a plurality of adjustment bolts 24 screwed at intervals onto the lower peripheral surface of the cap body 20.

[0015] <2.1> Hook-shaped hole The following description will be given with reference to FIGS. The hook-shaped hole 21 is an opening for inserting the comb tooth piece 52 of the fixed comb plate 50 therethrough. The hook-shaped hole 21 shown in this example has a plurality of insertion hole portions 21a along the axial direction of the cap body 20, and window hole portions 21b that are connected to the insertion hole portions 21a and open in a direction intersecting the insertion hole portions 21a.

[0016] <2.1.1> Fitting hole part The insertion hole portion 21a is an opening for inserting the comb tooth pieces 52 of the fixed comb plate 50 described later so that they can slide freely and tilt in the front-to-back direction, and is arranged parallel to the axis of the cap body 20. In this example, a configuration will be described in which the insertion hole portion 21a is formed in a vertically long rectangle to fit the comb tooth piece 52 having a rectangular cross section.

[0017] When the comb tooth piece 52 is inserted into the insertion hole portion 21a, the vertical length of the insertion hole portion 21a is slightly larger than the vertical length of the comb tooth piece 52 so that the comb tooth piece 52 can freely tilt in the front-to-rear direction.

[0018] <2.1.2> Window hole The window hole portion 21b is a peephole for visually observing the contact state of the tip of the comb tooth piece 52 of the fixed comb plate 50 inserted into the insertion hole portion 21a inside the cap body 20 from the outside, and extends in the circumferential direction of the cap body 20 relative to the insertion hole portion 21a. In this example, the window hole 21b is formed in a horizontally long rectangle, but there are no particular restrictions on the shape of the window hole 21b.

[0019] <2.1.3> Planar shape of the hook-shaped hole In this example, the planar shape of the hook-shaped hole 21 is described as being "L-shaped (Fig. 3(A))" or "inverted L-shaped (Fig. 3(B))" with the window hole portion 21b connected to the upper or lower part of the insertion hole portion 21a, but the hook-shaped hole 21 may also be "sideways T-shaped" (Fig. 3(C)) with the window hole portion 21b connected to the middle part of the insertion hole portion 21a. The hook-shaped hole 21 has a simple planar shape, so it can be easily formed.

[0020] <2.1.4> Number of hook holes The number of hook-shaped holes 21 formed in the circumferential direction of the cap body 20 can be selected as appropriate. The number of rows of the hook-shaped holes 21 in the height direction of the cap body 20 is the same as the number of comb-tooth pieces 52 formed on the fixed comb plate 50, which will be described later. In this example, a configuration in which hook-shaped holes 21 are formed at four locations along the circumferential direction of the cap body 20 and the hook-shaped holes 21 are arranged in three rows (stages) along the height direction of the cap body 20 will be described.

[0021] <2.2> Mounting bracket A mounting bracket 22 is erected on one side of a plurality of hook-shaped holes 21 formed in a vertical row along the axial direction of the cap body 20. The mounting bracket 22 has a total length that allows it to be disposed across a plurality of hook-shaped holes 21 formed in the axial direction of the cap body 20 . By configuring the mounting bracket 22 as a single plate, the joining accuracy with the joining surface of the fixed comb plate 50 is increased. Specifically, the mounting bracket 22 is fixed by welding or the like to one side of a plurality of insertion holes 21a formed in a vertical row along the axial direction of the cap body 20 so that the mounting bracket 22 does not block the insertion holes 21a. One side surface of the mounting bracket 22 and one side surface of the insertion hole portion 21a are flush with each other. The mounting bracket 22 is a support member for mounting the fixed comb plate 50, and has a plurality of bolt holes 23 formed at predetermined intervals on its plate surface.

[0022] In this example, the mounting bracket 22 is formed from a single plate so as to span multiple hook-shaped holes 21 formed in the vertical direction, but the mounting bracket 22 may also be divided into multiple pieces, and the divided mounting brackets 22 may be erected individually for each hook-shaped hole 21.

[0023] <2.3> Adjustment bolt 1, 4 and 5, a plurality of adjustment bolts 24 are screwed at intervals on the circumferential surface of the lower part of the cap body 20. The adjustment bolt 24 functions to receive reaction forces from the cap body 20 and the support pile 60 and adjust the position of the pile head cap 10 in the horizontal direction. In this example, four adjustment bolts 24 are screwed onto the lower peripheral surface of the cap body 20, but the number of adjustment bolts 24 may be three or more. The adjustment bolt 24 is not intended to fix the cap body 20, so a low-strength, small-diameter bolt can be used.

[0024] The adjustment bolt 24 is not essential and may be omitted.

[0025] <3> Top plate Referring to FIG. 1, the top plate 30 is used to fix beams and the like of a temporary bridge or a permanent bridge to be placed on top. The top plate 30 has a central portion 31 that is circular in plan view, and a protruding portion 32 that protrudes horizontally from the central portion 31 in the diameter direction. The top surface of the top plate 30 has elongated fixing holes 35 for fixing beams or the like to be placed on the top of the top plate 30 . The fixing holes 35 are elongated in order to adjust the placement positions of beams and the like. The fixing holes 35 may be drilled in advance or drilled on-site. The elongated fixing holes 35 are not essential and may be omitted in some cases.

[0026] <3.1> Marking lines on the top surface of the top plate The top surface of the top plate 30 has a first reference line 33 that is parallel to the protruding direction of the protruding portion 32 and passes through the center 36 of the central portion 31, and a second reference line 34 that is perpendicular to the first reference line 33 and passes through the center 36. The first reference line 33 and the second reference line 34 are provided in order to facilitate the arrangement of beams and the like placed on the top plate 30 in parallel or perpendicular orientation. Furthermore, if a recess is formed at the center 36 of the central portion 31, it becomes easier to measure in the x, y and z directions using the recess as a reference.

[0027] The first reference line 33 and the second reference line 34 described above are not essential and may be omitted.

[0028] If necessary, a stopper (not shown) may be provided on the bottom surface of the top plate 30 to project from the bottom surface and to be positioned inside the head of the support pile 60 . The stopper is configured by arranging plates in a cross shape, a circle shape, a radial shape, or the like in a plan view.

[0029] <4> Reinforcement rib A plurality of reinforcing ribs (40) are provided at the corners between the bottom surface of the top plate (30) and the outer peripheral surface of the cap body (20) at predetermined intervals in the circumferential direction of the cap body (20). If a hanging hole 41 is provided in a part of the reinforcing rib 40, the pile head cap 10 can be hung through the hanging hole 41. The reinforcing rib 40 is not essential and may be omitted in some cases.

[0030] <5> fixed comb plate 2, 3, and 7. The fixed comb plate 50 is a pressure-type fixing member for fixing the pile head cap 10 to the pile head of the support pile 60 by simultaneously pressing it against the outer peripheral surface of the support pile 60 at multiple points along the vertical direction.

[0031] The fixed comb plate 50 illustrated in this example comprises a bridging portion 51 having a total length that allows it to be arranged across multiple hook-shaped holes 21 formed in the axial direction of the cap body 20, and multiple comb tooth pieces 52 protruding horizontally at intervals on one side of the bridging portion 51. The fixed comb plate 50 is made of a hard plate such as metal. The reason why a plurality of comb tooth pieces 52 are provided for one fixed comb plate 50 is so that one fixed comb plate 50 can press down on multiple points on the outer circumferential surface of the support pile 60 at the same time.

[0032] <5.1>Bridging section The bridging portion 51 is a portion that integrally connects the plurality of comb tooth pieces 52 together, and functions as a load transmitting member between the comb tooth pieces 52 .

[0033] <5.2>Comb tooth piece The comb tooth piece 52 is inserted into the insertion hole portion 21a opened on the peripheral surface of the cap body 20, and the tip surface of the comb tooth piece 52 presses against the outer peripheral surface of the support pile 60, and functions as a fixing member for the support pile 60. All of the comb-tooth pieces 52 have the same protruding length relative to the bridging portion 51, and all of the comb-tooth pieces 52 can abut against the outer peripheral surface of the support pile 60 simultaneously. If the tip of each comb tooth piece 52 is rounded, the position of the fixed comb plate 50 in contact with the outer circumferential surface of the support pile 60 is stabilized when the fixed comb plate 50 is tilted. Each comb tooth piece 52 is provided with an elongated bolt hole 53 .

[0034] In this example, the bolt holes 23 of the mounting bracket 22 are circular holes, and the bolt holes 53 of the bridging portion 51 are horizontally elongated holes. However, the bolt holes 23 of the mounting bracket 22 may be elongated holes, and the bolt holes 53 of the bridging portion 51 may be circular holes.

[0035] <5.3> Fixed comb plate mounting structure As shown in Figures 2 and 3, to attach the fixed comb plate 50 to the mounting bracket 22, the fixed comb plate 50 is placed on top of the side of the mounting bracket 22, and then mounting bolts 54 are inserted through both bolt holes 23, 53 of the aligned mounting bracket 22 and comb tooth piece 52, and then thick, trapezoidal large-diameter washers 55 and nuts 56 are attached to secure the plate in place.

[0036] The reason why the thick and large diameter washer 55 is used to fix the fixed comb plate 50 is to firmly attach the slidable and tiltable fixed comb plate 50.

[0037] [How to use pile caps] A method of using the pile head cap 10 for covering and fixing the pile head of a support pile 60 driven into the ground will be described.

[0038] <1> Pile cap exterior The heads of the support piles 60 driven into the ground are cut to a predetermined height. After cutting, the cap body 20 of the pile head cap 10 is placed on the pile head of the support pile 60, and the position of the cap body 20 is adjusted as follows before being fixed to the support pile 60.

[0039] <2> Adjusting the position of the pile cap using the adjustment bolt (Figures 4 and 5) The horizontal position of the pile head of the support pile 60 may deviate from the design position. In such cases, the horizontal position of the pile head cap 10 is adjusted by moving a plurality of adjustment bolts 24 radially threaded into the lower part of the cap body 20 back and forth. The multiple adjustment bolts 24 not only function to adjust the position of the pile head cap 10 but also function as temporary fastening members.

[0040] <3> Final fixation of pile cap with fixed comb plate (Figures 6 and 7) A plurality of radially arranged fixed comb plates 50 are temporarily fixed to the peripheral surface of the cap body 20 that constitutes the pile head cap 10 via mounting bolts 54 or the like. A plurality of comb-tooth pieces 52 protruding from the fixed comb plate 50 are slidably inserted into the insertion hole portions 21a of the plurality of hook-shaped holes 21. The method of fixing the pile cap 10 using the fixing comb plate 50 will be described in detail below.

[0041] <3.1> Pressing the fixed comb plate With the pile head cap 10 temporarily fixed with the plurality of adjustment bolts 24, the entirety of each fixed comb plate 50 is pushed in by human force or the like. When each fixed comb plate 50 is pushed in, it slides along the elongated bolt hole 53 , and the tips of the multiple comb tooth pieces 52 press against the outer circumferential surface of the support pile 60 .

[0042] <3.2> Visibility inside the cap body When the fixed comb plate 50 is pushed in, the inside of the cap body 20 can be seen through the window hole portion 21b of the hook-shaped hole 21. That is, the contact state of the tips of the comb teeth 52 of the fixed comb plate 50 is visually confirmed through the window hole 21b. Since the insertion hole portion 21a of the hook-shaped hole 21 communicates with the window hole portion 21b, the inside of the cap body 20 can be easily viewed through the window hole portion 21b.

[0043] If, as a result of visual inspection through the window hole portion 21b, for example, some of the comb tooth pieces 52 are separated from the outer peripheral surface of the support pile 60, the separated portions of the fixed comb plate 50 are pressed again to press the tips of all of the comb tooth pieces 52 against the outer peripheral surface of the support pile 60. It is confirmed through the window hole portion 21 b of the hook-shaped hole 21 that the tips of all the comb tooth pieces 52 are in contact with the outer peripheral surface of the support pile 60 .

[0044] <3.3> Bolt fastening of fixed comb plate With the tips of the multiple comb tooth pieces 52 protruding from the fixed comb plate 50 abutting the outer surface of the support pile 60, the mounting bracket 22 and the fixed comb plate 50 are firmly tightened with mounting bolts 54, washers 55 and nuts 56. The fixed comb plate 50 is firmly fixed by the frictional resistance at the joint surface between the fixed comb plate 50 and the mounting bracket 22 caused by the fastening force of the mounting bolts 54.

[0045] The mounting bolts 54 may be torsion-type high-strength bolts. When each fixed comb plate 50 is tightened using a torsion-type high-strength bolt, breakage of the pintail at the end of the bolt can be visually confirmed, making it easy to manage the torque of the mounting bolts 54 and allowing the frictional resistance between the joint surfaces of all the fixed comb plates 50 and the mounting bracket 22 to be set appropriately. Therefore, variations in the fixing force due to the plurality of fixed comb plates 50 can be eliminated.

[0046] It is also possible to use non-torsion type high strength bolts (high tension bolts) as the mounting bolts 54, and manage the predetermined torque value using a torque wrench or the like.

[0047] For each fixed comb plate 50, the operation of pushing the fixed comb plate 50, visually inspecting the inside of the cap body 20, and bolting the fixed comb plate 50 are repeated, and by gripping the support pile 60 with multiple fixed comb plates 50, the pile head cap 10 is fixed to the pile head of the support pile 60. By attaching one fixed comb plate 50, multiple points on the outer peripheral surface of the support pile 60 can be supported simultaneously through multiple comb tooth pieces 52 protruding from the fixed comb plate 50, so that the work of fixing the pile head cap 10 can be carried out efficiently in a short time. Therefore, compared to conventional methods, the work required to fix the pile cap 10 can be significantly reduced in labor.

[0048] For example, if the axis of the support pile 60 is tilted relative to the vertical, when the pile head cap 10 is attached vertically to the tilted support pile 60, the peripheral distances between the upper and lower parts of the support pile 60 and the cap body 20 will be different. Even in such a case, the inclination of the support pile 60 can be easily corrected and the pile head cap 10 can be attached vertically by a simple operation of simply tilting one fixed comb plate 50 in the direction of correcting the inclination of the support pile 60 and pushing it in. In this way, the protruding length of the multiple comb tooth pieces 52 of the fixed comb plate 50 toward the support pile 60 can be easily adjusted by simply tilting one fixed comb plate 50 in the forward and backward directions.

[0049] After the work of fixing the pile head cap 10 is completed, the multiple adjustment bolts 24 used for temporary fixing may be left in the cap body 20 or may be removed.

[0050] <4> Fixing force by the fixed comb plate The plurality of comb tooth pieces 52 abutting against the outer peripheral surface of the support pile 60 at a plurality of points can transmit loads through the bridging portions 51 . Therefore, the outer peripheral surface of the support pile 60 can be efficiently gripped by all of the comb tooth pieces 52 protruding from each comb tooth piece 52 . Furthermore, if an excessive external force acts on some of the comb-tooth pieces 52, the force is distributed to the other comb-tooth pieces 52 through the bridging portion 51, and the entire mounting bracket 22 can be gripped with an even force.

[0051] <5> Regarding the loose bolt problem In the present invention, the fixed comb plate 50 is fixed by frictional resistance at the joint surface between the fixed comb plate 50 and the mounting bracket 22, so the problem of bolt loosening does not occur. Therefore, even if the pile head cap 10 is subjected to vibration, the mounting bolts 54 are unlikely to loosen, and therefore the fixing function of the multiple fixing comb plates 50 can be guaranteed for a long period of time. [Explanation of symbols]

[0052] 10. Pile cap 20 Cap body 21 Hook-shaped hole 21a... Hook-shaped hole insertion hole 21b... Hook-shaped hole window 22 Mounting bracket 23 Mounting bracket bolt hole 24 Adjustment bolt 30 Top plate 31. Center of top plate 32. Protruding part of top plate 33. First reference line of top plate 34 Second reference line of top plate 35 Top plate fixing holes 40 Reinforcement rib 41.....Reinforcing rib hanging hole 50...Fixed comb plate 51....Bridge part of fixed comb plate 52 Comb tooth piece of fixed comb plate 53 Bolt holes for fixed comb plate 54 Mounting bolt 55····Washer 56 Nut 60...Support pile

Claims

1. A pile head cap comprising a cylindrical cap body that can be fitted to the top of a support pile, a top plate that is fixed to the top of the cap body, and a plurality of fixed comb plates that are installed in the axial direction of the cap body and radially arranged at intervals around the circumferential direction of the cap body, The cap body has a plurality of hook-shaped holes formed at intervals along the circumferential direction and the height direction thereof, and mounting brackets provided radially and erected relative to the cap body near the hook-shaped holes, the fixed comb plate includes a bridge portion having a total length capable of being disposed across a plurality of hook-shaped holes formed in the axial direction of the cap body, and a plurality of comb-tooth pieces projecting laterally at intervals from one side of the bridge portion, The plurality of comb tooth pieces of the fixed comb plate inserted into the plurality of hook-shaped holes are pressed against a plurality of points on the outer peripheral surface of the pile head of the support pile, and the overlapping portions of the mounting bracket and the fixed comb plate are fastened and fixed with mounting bolts. Pile cap.

2. A pile head cap as described in claim 1, characterized in that the multiple comb tooth pieces of the fixed comb plate are inserted into multiple hook-shaped holes formed in the axial direction of the cap body so as to be able to slide freely and tilt in the forward and backward directions.

3. A pile head cap as described in claim 1, characterized in that the hook-shaped hole has an insertion hole portion formed intermittently along the axial direction of the cap body and a window hole portion opened in communication with the insertion hole portion, and the inside of the cap body is configured to be visible through the window hole portion.

4. The pile cap according to claim 3, wherein the planar shape of the hook-shaped hole is an inverted L-shape, an inverted L-shape, or a sideways T-shape.

5. A pile head cap as described in claim 1, characterized in that the bolt holes of either the fixed comb plate or the mounting bracket are circular holes, and the bolt holes of the other of the fixed comb plate or the mounting bracket are elongated holes.

6. 2. A pile cap according to claim 1, characterized in that the overlapping portion between the fixed comb plate and the mounting bracket is fastened and fixed with a mounting bolt, a thick, large-diameter washer and a nut.

7. 2. The pile cap according to claim 1, wherein the mounting bolts are torsion-type high-strength bolts.

8. 2. The pile cap according to claim 1, wherein the mounting bracket is a plate having a total length that allows it to be arranged across a plurality of hook-shaped holes formed in the axial direction of the cap body.

9. The pile head cap described in claim 1, characterized in that the cap body has a plurality of adjustment bolts radially threaded onto the cap body, and the plurality of adjustment bolts, which have the function of adjusting the position of the pile head cap relative to the support pile, are located below the plurality of fixed comb plates.

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