JP3844389B2 - Attaching tie rods to grooved reinforced concrete sheet piles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for attaching a tie rod to a reserved grooved reinforced concrete sheet pile mainly used as a river or ocean revetment wall.
[0002]
[Prior art]
Grooved reinforced concrete sheet piles are widely used as river and ocean revetment walls. In such cases, they are supported by connecting them with a tie rod and a tie rod buried on the ground in the back, and are often used as so-called arched sheet piles. . In this case, when the attachment position of the tie rod to the sheet pile is high and it is the head of the sheet pile, as shown in FIG. 6, the tie rod 2 is passed through the grooved reinforced concrete sheet pile 1 and a pair of upper and lower grooves which are flank members Generally, the nut 9 is screwed into the tip portion through the gap of the shape rope 5 and fixed to the front face of the sheet pile with the groove shape rope 5 interposed therebetween. Since this attachment portion is wrapped in the shaded concrete 7 for a while, there is no particular problem in terms of aesthetics or rust prevention of the grooved rope.
[0003]
However, it may be necessary to attach the tie rod to a low position where it is not encased in the sheet pile cap concrete 7. In this case, the tie rod 5 and the tie rod are used for reasons such as aesthetics and rust prevention of the groove tie. 2 is required to be fixed to the back side of the grooved reinforced concrete sheet pile 1. In this case, since the groove-shaped rope 5 is directly attached to the back surface of the groove-shaped reinforced concrete sheet pile 1, a space for fixing (bolting) the tie rod 2 to the groove-shaped rope 5 cannot be secured. As shown, a box metal 12 for securing a space is first attached to the back surface of the grooved reinforced concrete sheet pile 1, and a groove rope 5 is generally attached to the box metal 12.
[0004]
[Problems to be solved by the invention]
Since the box metal fitting is a relatively large metal fitting, and the number of the metal fittings used is large, it takes a lot of labor and cost to install the box metal fitting. Therefore, the advent of a tie rod attachment method that does not require a box metal fitting for securing a space is desired.
[0005]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for attaching a tie rod to the back side of a low position that is not encased in a shaded concrete of a grooved reinforced concrete sheet pile without using a box metal fitting for securing a space in response to such a demand.
[0006]
The mounting method according to claim 1 of the present application is as follows: (A) Notch portions on the back side of both side end surfaces of the leg portions of the grooved reinforced concrete sheet pile in which the back surface is a smooth surface and the thick leg portions protrude from both side edges of the front surface. A fixing plate and a nut are embedded in a non-notched portion around the notched portion, and (B) a bolt hole corresponding to the position and number of the buried nut after the grooved reinforced concrete sheet pile is driven. A tie rod with a back metal fitting having a tie rod insertion hole attached to the tip is abutted across the notched portion of the adjacent grooved reinforced concrete sheet pile, and (C) a mounting bolt is screwed to the buried nut Then, one end of the tie rod is fixed to the back surface of the groove-shaped reinforced concrete sheet pile while the tip of the tie rod is housed in the notch, and (D) the other end of the tie rod is fixed to the retaining sheet pile.
[0007]
The mounting method according to claim 2 includes: (A) providing notches on the front side of both end surfaces of the legs of the grooved reinforced concrete sheet pile in which the front surface is a smooth surface and the thick leg portions protrude from both side edges of the back surface. In addition, a notch extending from the bottom of the notch to the back is provided, (B), and a fixing plate is embedded on the bottom of the notch, and a nut is embedded on the back of the notch, (C) After driving the groove-shaped reinforced concrete sheet pile, screw the mounting bolts inserted into the bolt holes into the back fittings having bolt holes and tie rod insertion holes corresponding to the position and number of the embedded nuts to the embedded nuts. (D) One end of the tie rod is inserted into the tie rod insertion hole of the back metal fitting and the notch, and the tip portion protrudes into the notch. Let Fixing one end of the tie rod to the front of the grooved reinforced concrete sheet pile while screwing a mounting nut to the tip and storing the tip of the tie rod in the notch, and (E) fixing the other end of the tie rod to the retaining sheet pile It is characterized by.
[0008]
The invention according to claim 1 is the case where the grooved reinforced concrete sheet pile is used with the leg portion as the front surface (water channel side) and the smooth surface as the back surface (natural ground side), and the invention according to claim 2 conversely is the groove shape reinforced concrete sheet pile. Are used as the back side (natural ground side) and the smooth surface is used as the front side (water channel side). The first important point common to the inventions according to both claims is that the predetermined shape of the grooved reinforced concrete sheet pile A notch portion for a tie rod is provided in advance at a position, and a bolt fastening portion at the tip of the tie rod can be stored in the notch portion. By providing the notch portion, the bolt tightening portion at the tip of the tie rod is accommodated in the notch portion, so that the box metal fitting that has been indispensable for securing the space in the related art becomes unnecessary.
[0009]
The second point common to the inventions of both claims is that instead of the conventional two-piece set of upper and lower groove-shaped ropes, a lightly equipped rear metal fitting is used, Adjacent channel-shaped reinforced concrete sheet piles are connected to each other, and tie rods are attached via the back metal fittings. In the past, even when angling material was not particularly needed, angling material was used to attach the tie rod, but as a result, the construction of a structure that does not require angling material further reduced the cost and labor saving. It becomes.
[0010]
In the invention according to claim 2, since the bolt fastening portion of the tie rod is housed in the notch portion on the front face of the sheet pile and is fixed to the front face of the sheet pile, in a strict sense, the tie rod is not attached to the rear face of the sheet pile. May. However, most of the mounting work is performed on the back side, and only the notch and the tip of the tie rod are exposed on the front side. Moreover, this notch is filled with mortar or covered with a landscape panel after the tie rod is mounted. The method according to claim 2 is also included in the category of the back mounting because it is not exposed and does not become a problem in terms of aesthetics and rust prevention.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention according to the claims of the present application will be described below with reference to the drawings.
[0012]
1A and 1B show an example of an embodiment of the invention according to claim 1, wherein FIG. 1A is an elevational view, and FIG. 1B is an AA cross-sectional view of FIG. 2A and 2B show an example of a back metal fitting used in the inventions according to claims 1 and 2, wherein FIG. 2A is an elevation view, FIG. 2B is a plan view, and FIG. 2C is a side view. FIG. 3: shows the notch part periphery of an example of the groove-shaped reinforced concrete sheet pile used by the invention which concerns on Claim 1, (a) is a front view, (b) is a cross-sectional view. 4A and 4B show an example of an embodiment of the invention according to claim 2. FIG. 4A is an elevational view, and FIG. 4B is an AA cross-sectional view of FIG. FIG. 5 shows a periphery of a cutout portion of an example of a grooved reinforced concrete sheet pile used in the invention according to claim 2, wherein (a) is a front view and (b) is a cross-sectional view.
[0013]
An embodiment of the invention according to claim 1 will be described. (Refer to FIGS. 1 to 3)
(1) The smooth surface of the grooved reinforced concrete sheet pile 1 is used as the back surface. A notched portion 10 having a semicircular cross section is provided on the back side of both end surfaces of the grooved reinforced concrete sheet pile 1, and a fixing plate 8 and two nuts 3 are embedded in a non-notched portion around the notched portion 10.
[0014]
(2) When a plurality of channel-shaped reinforced concrete sheet piles 1 are joined in a concavo-convex joint and are sequentially driven in the laying direction, the periphery of the notch 10 of the joint becomes the state shown in FIG.
[0015]
(3) On the other hand, the back metal fitting 4 shown in FIG. 2 is prepared. The bottom plate of the back metal fitting 4 has a tie rod insertion hole 4b in the center and four bolt holes 4a around it. The tip of the tie rod 2 is passed through the tie rod insertion hole 4 b of the back metal fitting 4, and a nut 9 is screwed to the tip to attach the back metal fitting 4 to the tip of the tie rod 2.
[0016]
(4) When the tie rod 2 with the back metal fitting 4 attached to the tip is brought into contact with the periphery of the notch 10 of the joint and the bolt passed through the bolt hole 4a of the back metal fitting 4 is screwed into the embedded nut 3, the back metal fitting 4 Is fixed to the back surface of the grooved reinforced concrete sheet pile 1 and at the same time the tip of the tie rod 2 is housed in the notch 10. Thus, one end of the tie rod 2 is fixed to the back surface of the grooved reinforced concrete sheet pile 1.
[0017]
(5) The other end of the tie rod 2 is fixed to the baffle sheet 6 via a pair of upper and lower channel ropes 5 and the attachment of the tie rod 2 is completed.
[0018]
The tie rods 2 may be attached each time the grooved reinforced concrete sheet pile 1 is driven, or may be collectively collected after a considerable number of the grooved reinforced concrete sheet piles 1 are driven. In addition, a pressure bearing plate and a washer are appropriately used for bolting each part.
[0019]
An embodiment of the invention according to claim 2 will be described. (See Figs. 2, 4 and 5)
(1) The smooth surface of the grooved reinforced concrete sheet pile 1 is used as the front surface. A box-shaped notch 10 is provided on the front side of both end faces of the grooved reinforced concrete sheet pile 1, and a notch 11 extending from the bottom of the notch 10 to the back is provided. The fixing plate 8 is embedded in the bottom surface of the notch 10, and the nut 3 is embedded in the back side of the notch 10 so as to open to the back surface.
[0020]
(2) When a plurality of groove-shaped reinforced concrete sheet piles 1 are joined in a concavo-convex joint and are sequentially driven in the laying direction, the periphery of the notch 10 of the joint is in the state shown in FIG.
[0021]
(3) On the other hand, the back metal fitting 4 shown in FIG. 2 is prepared. The bottom plate of the back metal fitting 4 has a tie rod insertion hole 4b in the center and four bolt holes 4a around it.
[0022]
(4) A bolt is passed through the bolt hole 4 a of the back metal fitting 4 and screwed into the embedded nut 3 to fix the back metal fitting 4 to the back side of the notch 10.
[0023]
(5) Insert the tip of the tie rod 2 from the back side in the order of the tie rod insertion hole of the back metal fitting 4 and the notch 11, and project the tip into the notch 10 on the front side, and screw the nut 9 into the projection. Then, one end of the tie rod 2 is fixed to the grooved reinforced concrete sheet pile 1.
[0024]
(6) The other end of the tie rod 2 is fixed to the baffle sheet 6 via a pair of upper and lower grooved ropes 5 and the attachment of the tie rod 2 is completed.
[0025]
The tie rods 2 may be attached each time the grooved reinforced concrete sheet pile 1 is driven, or may be collectively collected after a considerable number of the grooved reinforced concrete sheet piles 1 are driven. In addition, a pressure bearing plate and a washer are appropriately used for bolting each part.
[0026]
【The invention's effect】
Since the invention according to both claims of the present application is configured as described above, the following effects can be obtained. (1) The bolt tightening part at the tip of the tie rod is housed in the notch, eliminating the need for box fittings that had been required to secure the space for the bolt tightening part, reducing costs and saving labor. Greatly contributes. (2) Furthermore, since the mounting of the back metal fitting is adopted instead of the mounting of the flank material, which is essential for mounting the tie rod, the equipment becomes lighter, further reducing the cost and saving labor.
[Brief description of the drawings]
1A and 1B show an example of an embodiment of the invention according to claim 1; FIG. 1A is an elevation view, and FIG.
FIGS. 2A and 2B show an example of a back metal fitting used in the inventions according to claims 1 and 2, wherein FIG. 2A is an elevation view, FIG. 2B is a plan view, and FIG. 2C is a side view;
FIGS. 3A and 3B show a periphery of a cutout portion of an example of a grooved reinforced concrete sheet pile used in the invention according to claim 1, wherein FIG. 3A is a front view and FIG. 3B is a cross-sectional view.
FIGS. 4A and 4B show an example of an embodiment of the invention according to claim 2; FIG. 4A is an elevation view, and FIG.
5A and 5B show a periphery of a cutout portion of an example of a grooved reinforced concrete sheet pile used in the invention according to claim 2, wherein FIG. 5A is a front view and FIG. 5B is a cross-sectional view.
FIG. 6 is a longitudinal sectional view showing a conventional front mounting method.
7A and 7B show a conventional back surface mounting method, wherein FIGS. 7A and 7B are plan views and FIG. 7C are longitudinal sectional views.
[Explanation of symbols]
1 ... Channel-shaped reinforced concrete sheet pile, 2 ... Tie rod, 3 ... Embedded nut, 4 ... Back bracket, 4a ... Bolt hole, 4b ... Tie-rod insertion hole, 5 ... Channel rope, 6 ... Reservoir sheet pile 7 …… Shape concrete, 8 …… Fixing plate, 9 …… Nut, 10… Notch, 11 …… Incision, 12… Box bracket, 13 …… Supporting plate, 14 …… Bolt.

Claims (2)

(A) A notch portion is provided on the back side of both end surfaces of a leg portion of a grooved reinforced concrete sheet pile with a smooth back surface and thick leg portions protruding on both side edges of the front surface. A fixing plate and nut are embedded in the notch, and after (B) the groove-shaped reinforced concrete sheet pile is driven, a back fitting having a bolt hole and a tie rod insertion hole corresponding to the position and number of the embedded nut is attached to the tip. Attaching the tip of the attached tie rod across the non-notched portion of the adjacent grooved reinforced concrete sheet pile, (C) screwing a mounting bolt onto the embedded nut, and inserting the tip of the tie rod into the notch While storing, one end of the tie rod is fixed to the back of the grooved reinforced concrete sheet pile, and (D) the tie rod is attached to the grooved reinforced concrete sheet pile, wherein the other end of the tie rod is fixed to the retaining sheet pile. Only way. (A) A notch is provided on the front side of both end surfaces of a leg portion of a grooved reinforced concrete sheet pile having a smooth front surface and thick legs projecting on both side edges of the back surface. (B), and a fixing plate is embedded in the bottom surface of the notch, and a nut is embedded in the back side of the notch, and (C) the grooved reinforced concrete sheet pile After driving, the adjacent groove-shaped reinforced concrete sheet pile is formed by screwing a mounting bolt inserted through the bolt hole into the back nut having a bolt hole and a tie rod insertion hole corresponding to the position and number of the embedded nut. (D) Insert one end of the tie rod into the tie rod insertion hole and the notch of the back bracket and project the tip into the notch, and attach a mounting nut to the tip. Screwing To the grooved reinforced concrete sheet pile, wherein one end of the tie rod is fixed to the front surface of the grooved reinforced concrete sheet pile while the tip of the tie rod is housed in the notch, and (E) the other end of the tie rod is fixed to the retaining sheet pile. How to install the tie rod.

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