JPH09143965A - Door element fixing anchor for upward facing hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a PC steel material from rupturing. SOLUTION: An anchor 10 for fixation of door element to an upward facing hole is equipped with a PC steel strand (tensioning material) 11 to be inserted while a gap is reserved to the side wall of an anchor inserting hole H, a foremost mansion 12 fixed to the tip of the strand 11, a fixture 13 continued to the base end of the mansion 12 through a pressure supporting ring 50, and a base side mansion 14 secured to the base end of the strand 11. The arrangement further includes a packer 20 to choke the gap between the strand 11 and the side wall of the hole H, air pipe 21, primary grout injecting pipe 31 for injecting the primary grout, primary air exhaust pipe 32, secondary grout injecting pipe 33 to inject the secondary grout, and a secondary air exhaust pipe 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door body fixing anchor for fixing a door body of a discharge gate to a bank, and more particularly to a door body fixing anchor for an upward hole fixed to an upward anchor insertion hole. .

[0002]

2. Description of the Related Art Dams are sometimes constructed for the purpose of flood control in river basins, maintenance of normal functions of river basins, power generation, and the like. In such a dam, in order to control the amount of water stored in the dam,
Some have discharge gates installed.

The discharge gate is provided at the downstream end of the discharge pipe that penetrates the dam body from the upstream side to the downstream side. A typical one of the discharge gates is a shell-shaped skin plate that can directly close the discharge pipe and is directly subjected to water pressure.
One end is fixed to this skin plate, and a pedestal extending to the downstream side and the other end of this pedestal are rotatably attached,
It has a girder fixed to the dam body. One of the methods of fixing this girder to the bank is the PC anchor method.

The PC anchor method is a method in which the water pressure received by the skin plate is replaced with concrete (bank) stress by the prestressing force of PC steel material (tensile material) through a girder. In order to enable such replacement, the base end of the PC steel material is fixed to the girder and is anchored in the anchor insertion hole drilled in the bank so as to extend upstream.

By the way, the bank is watertight because it contacts the stored water and the discharged water. Therefore, PC steel must be rustproof.

[0006] Conventionally, as a method for preventing corrosion of PC steel,
Applying grease etc., covering with polyethylene etc.

[0007]

However, the following problems have been pointed out by a few scholars in the prior art.

[0008] The application of grease or the like has a problem in that there is a small possibility of brittle fracture near the boundary surface between the fixed portion and the free length portion of the PC steel material. The fixing portion means a portion of PC steel material fixed to the hole wall of the anchor insertion hole by grout. The free length part means the other part of the PC steel material existing in the anchor insertion hole.

Further, the coating with polyethylene or the like has a problem that microorganisms propagate, the coating deteriorates, the PC steel material corrodes, and there is a small possibility that it will eventually break, but there is a problem.

The present applicants verified these problems pointed out by experiments, but could not confirm them. Moreover, the above-mentioned problem does not occur at all in the products constructed by the applicants. However, the present invention has been completed so as to be perfect.

The present invention has been made in view of such circumstances, and an object thereof is to provide a door body fixing anchor for an upward hole capable of preventing breakage of a PC steel material.

[0012]

The gist of the invention according to claim 1 is to provide a tension member to be inserted into the anchor insertion hole formed in the dam body of the dam, and a tension member to be inserted into the anchor insertion hole. At the tip end of the anchor insertion hole, which has an outer diameter smaller than the inner diameter of the anchor insertion hole, is connected to the base end side of this tip side apartment via a bearing ring, and is larger than the inner diameter of the anchor insertion hole. A door body fixing anchor for an upward hole for fixing a door body provided to a discharge gate of a dam to a bank body, the anchor having a small outer diameter and a fixing body into which a tension member is inserted, the fixing body being a fixing body. A packer that is connected to the proximal end side of the device through the connection piece and that closes the space between the tension material and the hole wall of the anchor insertion hole only in the expanded state, an air pipe that expands and contracts this packer, and a packer The tip is located on the tip side, The primary grout injection pipe that injects the primary grout into the gap between the outer surface of the end-side condominium and the fixing body and the hole wall of the anchor insertion hole, and the tip is located on the tip side of the packer, and the primary grout is injected. The primary exhaust pipe for discharging the air existing in the gap between the outer surface of the front-side apartment and the fixing body and the hole wall of the anchor insertion hole to the outside of the anchor insertion hole, and the inside of the fixing body, the connection piece and the packer. The secondary grout is injected only into the gap between the side surface and the outer side surface of the tension member, and the gap between the outer side surface of the tension member and the hole wall of the anchor insertion hole, which is located on the base end side of the packer. A secondary grout injection tube for coating the secondary grout with
When the secondary grout is injected, air existing in the gap between the inner surface of the fixing member and the inner surfaces of the connection piece and the packer and the outer surface of the tension member, and the hole wall of the anchor insertion hole and the outer surface of the tension member. And a secondary exhaust pipe for discharging the air existing in the gap between the anchor insertion hole and the outside of the anchor insertion hole. The gist of the invention according to claim 2 is that the tip of the primary grout injection pipe is located at the base end side of the fixing portion, the tip of the primary exhaust pipe is located at the tip of the anchor insertion hole, and 2. The door hole fixing anchor for an upward hole according to claim 1, wherein the tip is located closer to the base end side than the packer, and the tip of the secondary exhaust pipe communicates with the inside of the tip side end of the fixing member. . The gist of the invention according to claim 3 is that the connection piece has a primary injection hole that penetrates from the base end side to the tip end side, which communicates with the gap between the outer surface of the tip side apartment and the fixing body and the hole wall of the anchor insertion hole. According to another aspect of the present invention, there is provided an anchor for a door body for an upward hole, wherein a tip of a primary grout injection pipe is attached to the primary injection hole. The gist of the invention according to claim 4 is that the connection piece is provided with a primary connection hole and a secondary connection hole that penetrate from the base end side to the tip end side, and the primary exhaust pipe is connected to the primary connection hole. 3. The door fixing anchor for an upward hole according to claim 2, wherein a secondary exhaust pipe is connected to the secondary connecting hole. The gist of the invention according to claim 5 is that the primary injection hole according to claim 3 and the primary connection hole and the secondary connection hole according to claim 7 are provided on the opposite side in the radial direction of the tension member. The door body fixing anchor for an upward hole according to claim 2. The gist of the invention according to claim 6 is that the bearing ring is provided with a secondary exhaust hole penetrating from the end face on the base end side to the inner side surface, and the tip of the secondary exhaust pipe is connected to the secondary exhaust hole. The door fixing anchor for an upward hole according to claim 2. The gist of the invention according to claim 7 is that the bearing ring is provided with a fitting groove that is continuous in the axial direction, and the primary exhaust pipe is fixed to this fitting groove. It exists in the door body fixing anchor for holes. The gist of the invention according to claim 8 is that the pilot cap provided at the tip of the tip side apartment has a fixed groove continuous in the axial direction, and the tip of the primary exhaust pipe is fixed to this fixed groove. The door body fixing anchor for an upward hole according to claim 2. The gist of the invention according to claim 9 is the primary exhaust pipe and the secondary exhaust pipe in a state in which the door hole fixing anchor for the upward hole is fixed in the bank body so as to extend obliquely from the base end toward the tip. 2. The upward hole according to claim 1, wherein the tip of the pipe is located above the tendons, and the tips of the primary grout injection pipe and the secondary grout injection pipe are located below the tendons. It exists in the door body fixing anchor. The gist of the invention according to claim 10 is a door body fixing method using the door hole fixing anchor for an upward hole according to claim 1, for fixing a door body provided to a discharge gate of a dam to a bank. , A step of boring the cut-off wall to form an anchor insertion hole, a step of inserting the upward hole door fixing anchor according to claim 1 into the anchor insertion hole, and a step of feeding air from an air pipe to a packer. The step of inflating to close the gap between the anchor insertion hole and the hole wall, and injecting the primary grout from the primary grout injection pipe while exhausting from the primary exhaust pipe, The step of filling the primary grout in the gap between the outer surface and the hole wall of the anchor insertion hole, and after the required strength is developed in the primary grout, the tension member is tensioned and the gate body of the gate is rotatably fixed. Secure the base end of the tension material to the garter. And the gap between the inner surface of the condominium on the tip side, the connection piece and the packer and the outer surface of the tension member, and the gap between the hole wall of the anchor insertion hole and the outer surface of the tension member after this step. A door fixing anchor for an upward hole, comprising a step of covering the outer surface of the tension member with the secondary grout by injecting the secondary grout from the secondary grout while exhausting from the secondary exhaust pipe. It depends on the door fixing method used. The gist of the invention according to claim 11 is to fix the door body of the discharge gate using the upward hole door fixing anchor according to claim 1, wherein the door body provided to the discharge gate of the dam is fixed to the bank body via a girder. In the structure, the steel pipe is inserted from the base end side of the anchor insertion hole to at least the packer, and the primary grout is filled in the gap between the outer surface of the front end side apartment and the fixing body and the hole wall of the anchor insertion hole, A secondary grout is filled in the gap between the inner surface of the condominium on the tip side, the connection piece and the packer and the outer surface of the tension member, and the gap between the hole wall of the anchor insertion hole and the outer surface of the tension member. Is a door fixing structure for a discharge gate, which is characterized in that the base end of the tension member is fixed to the girder by being covered with a secondary grout.

In the present invention, the gap between the inner surface of the fixing member and the inner surfaces of the connection piece and the packer, and the outer surface of the tension member, and the gap between the hole wall of the anchor insertion hole and the outer surface of the tension member are Inject the secondary grout from the secondary grout injection tube.

When the secondary grout is injected, the secondary exhaust pipe is provided with the air existing in the gap between the inner surface of the front-end condominium fixing body and the inner surfaces of the connecting piece and the packer and the outer surface of the tension member, and Air existing in the gap between the hole wall of the anchor insertion hole and the outer surface of the tendon is discharged to the outside of the anchor insertion hole. Therefore, the secondary grout can be injected.

The injected secondary grout coats the tendons. The coated secondary grout rusts the tendons.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In the upward hole door fixing anchor according to the present embodiment, as shown in FIG. 1, the door 1 provided at the downstream end of the discharge pipe 2 of the gate G of the gravity dam is used as the dam body 3. It is fixed to.

As shown in FIG. 2, the door body 1 has a shell-like skin plate 4 which directly receives water pressure and can close the discharge pipe 2, and one end of which is fixed to the skin plate 4 and extends downstream. The pedestal 5 and the trunnion hub 6 formed at the other end of the pedestal 5 are rotatably attached, and the girder 7 fixed to the bank 3 shown in FIG. The girder 7 is fixed to the bank body 3 shown in FIG. 1 by the upward hole door fixing anchor 10.

The door body fixing anchor 10 for the upward hole is shown in FIG.
As shown in FIG. 3, its base end is fixed to the girder 7 and is fixed to the anchor insertion hole H (not shown in FIGS. 2 and 3) drilled in the bank 3 so as to extend to the upstream side. ing. 2 and 3, the door hole fixing anchor 10 for the upward hole is illustrated in a simplified manner.

As shown in FIG. 4, the upward hole door fixing anchor 10 is fixed to the upward anchor insertion hole H, and is inserted at a distance from the hole wall of the anchor insertion hole H. PC steel stranded wire (tension material) 11, a tip side condominium 12 fixed to the tip of the PC steel stranded wire and having an outer diameter smaller than the inner diameter of the anchor insertion hole H, and the base end of the tip side condominium 12 The fixing body 13 having an outer diameter smaller than the inner diameter of the anchor insertion hole H, which is continuous to the side through the bearing ring 50, and the base-side condominium 14 fixed to the base-end side of the PC steel wire 11. I have it. In addition, the base end side is the side where the code B is located in FIG. 4, and the tip side is the side where the code T is located. Reference numerals 15 to 18 are constituent members of the fixing device. Reference numeral 15 is a liner, reference numeral 16 is a spherical washer, reference numeral 17 is a nut, and reference numeral 18 is an end plug.
Further, the packer 20, the air pipe 21, the primary grout injection pipe 31, the primary exhaust pipe 32, the secondary grout injection pipe 3
3, and a secondary exhaust pipe 34. Further, in FIG. 4, the door body fixing anchor 1 for the upward hole is shown so as to be easily visible.
The grout for fixing 0 is omitted.

As shown in FIG. 7, the packer 20 is connected to the base end side of the fixing body 13 via the connecting piece 40, and the PC steel stranded wire 11 and the hole wall of the anchor insertion hole H are formed only in the expanded state. The space is closed. FIG. 7 shows a state where the packer 20 has expanded. A steel pipe 19 is fitted in a portion of the anchor insertion hole H where the packer 20 exists.

The expansion and contraction of the packer 20 is performed by the air pipe 21.
By. As shown in FIGS. 7 and 8, the air pipe 21 is provided below the PC steel strand 11.

As shown in FIG. 4, the primary grout injection pipe 31 is arranged along the axial direction of the PC steel stranded wire 11 and has its tip screwed to the connection piece 40. On the base end side, as shown in FIG. 8, it is located between the outer surface of the PC steel strand 11 and the hole wall of the anchor insertion hole H. At the portion where the packer 20 is located, as shown in FIG. 7, it extends inside the inner tube of the packer 20.

As shown in FIG. 4, the end of the primary exhaust pipe 32 reaches the end of the anchor insertion hole H. On the base end side, as shown in FIG. 8, it is located between the outer surface of the PC steel strand 11 and the hole wall of the anchor insertion hole H. In the portion where the packer 20 is located, as shown in FIG. 7, it extends inside the inner tube of the packer 20. In the portion where the fixing body 13 is located, it is provided along the outer surface of the fixing body 13 as shown in FIG. Also, on the way,
It is connected to an exhaust pipe socket (not shown). In the figure,
Reference numeral 60 is a spacer for positioning the primary exhaust pipe 32 and the secondary exhaust pipe 34, and for positioning the PC steel strand 11 at the center of the anchor insertion hole H. The tip is
As shown in FIG. 5, it is fixed to a pilot cap 70 attached to the tip of the tip side apartment 12.

As shown in FIG. 18, the pilot cap 70 is a cap 70 having one end formed in a conical shape and the other end having a cylindrical recess having an outer contour and a bottom. As shown in FIG. 17, a fixed groove 71 having a U-shaped cross section is formed along the axial direction, and a tip portion of the primary exhaust pipe 32 (not shown in FIG. 7) is fitted into the fixed groove 71. Fixture 72 shown in
It is fixed by.

As shown in FIG. 4, the secondary grout injection pipe 3
3 is provided so as to be spaced from the PC steel wire 11 so that its tip is located closer to the base end side than the packer 20.

The secondary exhaust pipe 34, as shown in FIG.
The C steel extends along the wire 11, and the tip is screwed to the bearing ring 50 via the connection piece 40. As shown in FIG. 7, it extends inside the inner tube of the packer 20. In the portion where the fixing body 13 is located, as shown in FIG. 6, it extends to the outer side surface of the fixing body 13.

The connection piece 40 is a short tubular body whose axial center bulges outward in the radial direction, as shown in FIGS. As shown in FIGS. 4 and 12, the base end side is screwed to the packer 20, and the tip end side is screwed to the fixing body 13. A primary injection hole 41 having an inverted V-shaped vertical cross-sectional view is provided in a portion to be positioned below the PC steel wire 11 in a state where the upward hole door fixing anchor 10 is fixed to the bank 3. Perforated. The primary injection hole 41 penetrates from the base end side to the tip end side, and a female screw for water supply is cut on the base end side. A primary grout injection pipe 3 in which a male screw is cut on this female screw for water supply
The tip of 1 is screwed. The tip of the primary injection hole 41 is open to the tip side of the connection piece 40. Therefore, as shown in FIG.
In the gap between the anchor and the hole wall of the anchor insertion hole H, the connecting piece 40
Is communicated through. The primary injection hole 41 is formed so as to be located below the PC steel strand 11 in a state where the upward hole door fixing anchor 10 is fixed to the bank 3. A primary connection hole 42 and a secondary connection hole 43 are formed on the upper side, and a primary exhaust pipe 32 (not shown in FIG. 12) is connected to the primary connection hole 42 (not shown in FIG. 12).
The secondary exhaust pipe 34 is screwed into the secondary connection hole 43. 1
As for the secondary connection hole 42 and the secondary connection hole 43, as shown in FIGS.
In the state of being fixed to the above, they are formed by being shifted from right above to the left and right by 30 ° in the circumferential direction. Female threads for water supply are also cut at the openings of the primary connection hole 42 and the secondary connection hole 43, and the primary exhaust pipe 32 and the secondary exhaust pipe 34 are screwed. In FIG. 10, reference numeral 44 is a plug screw that closes a hole formed when the connection hole is formed by forming a hole.

The connection piece 40 and the packer 20 are shown in FIG.
As shown in FIG. 2, the connection piece sockets 45 are connected. The connection piece socket 45 has a ring shape with an internal thread on the inner peripheral surface. This female screw is a male screw cut on the outer peripheral surface of the proximal end of the connection piece 40,
Also, the connection piece 40 and the packer 20 are connected while maintaining watertightness by being screwed into a male screw cut on the outer peripheral surface of the tip end side end of the packer 20.

As shown in FIGS. 5 to 8, the primary exhaust pipe 32 and the secondary exhaust pipe 34 are made of PC steel stranded wire 1 with the upward hole door fixing anchor 10 fixed to the bank 3.
It is arranged above 1. In the portion where the fixing body 13 exists, the outer surface is positioned by a spacer 60 provided with a convex portion at a predetermined interval. The primary exhaust pipe 32 is
In the portion where the fixing body 13 is present, as shown in FIG.
It is provided about 30 ° out of the C steel strand 11 in the circumferential direction. As the primary exhaust pipe 32 goes toward the pilot cap 70 to which the tip is attached,
Approximately 30 in the circumferential direction of the fixing body 13 and the tip side condominium 12.
Draws a spiral of ° and is located directly above the tip of the anchor insertion hole H as shown in FIG.

As shown in FIGS. 7 and 8, the primary grout injection pipe 31 and the secondary grout injection pipe 33 are arranged below the PC steel strand 11. Primary grout injection pipe 31
As shown in FIG. 8, the wire is displaced by about 30 ° in the circumferential direction from directly below the PC steel wire 11, but as it goes toward the tip,
A spiral of about 30 ° is drawn in the circumferential direction of the inner pipe 22, and it is located right below as shown in FIG. 7.

As shown in FIGS. 13 to 15, the bearing ring 50 is a thick-walled tubular body, a part of which bulges outward in the radial direction, and the upward hole door fixing anchor 10 is attached to the bank 3. In the fixed state, the secondary exhaust hole 51 and the fitting groove 52 are formed on the upper side. The secondary exhaust hole 51 has an L-shaped vertical cross section that penetrates from the end face on the base end side to the inner side face.
A female screw for water supply is cut at the proximal end of the secondary exhaust hole 51. A male screw cut at the tip of the secondary exhaust pipe 34 is screwed onto the female screw for water supply. In FIG. 14, reference numeral 53 is a plug screw that closes a hole formed when the secondary exhaust hole 51 is formed by punching. The fitting groove 52 is shown in FIG.
As shown in FIG. 3 and FIG. 15, a fitting groove 52 having a U-shaped cross section is formed along the axial direction. The primary exhaust pipe 32 is fitted and fixed in the fitting groove 52. As shown in FIG. 16, an internal thread is formed on the inner side surface of the bearing ring 50 at the end portion on the base end side, and the end portion on the tip end side of the fixing body 13 is screwed on. The base end of the tip end condominium 12 is screwed to the tip end of the pressure bearing ring 50.

Next, the operation of the upward hole door fixing anchor 10 constructed as described above will be described.

The packer 20 closes the gap between the PC steel strand 11 and the anchor insertion hole H, and the primary grout F is provided in the gap between the packer 20 and the tip of the anchor insertion hole H.
Allows G to be filled.

The primary injection hole 41 bored in the connection piece 40 to which the primary grout injection pipe 31 is screwed is provided with the primary grout FG transferred in the primary grout injection pipe 31, the tip side condominium 12 and It is injected into the gap between the fixing body 13 and the wall of the anchor insertion hole H.

When the door hole fixing anchor 10 for the upward hole is fixed so as to extend obliquely upward, the primary exhaust pipe 32 is the hole of the tip side apartment 12 and the fixing member 13 and the anchor insertion hole H. 1 through the primary injection holes 41 in the gap with the wall
When the next grout FG is injected, the air existing in the gap is discharged to the outside of the anchor insertion hole H.

By injecting the primary grout FG, the fixing portion 10a shown in FIG. 4 is fixed to the hole wall of the anchor insertion hole H.

The secondary grout injection pipe 33 includes the fixing member 13,
The gap between the inner surface of the connection piece 40 and the packer 20 and the outer surface of the PC steel wire 11, and the outer surface of the PC steel wire 11 and the hole wall of the anchor insertion hole H existing on the base end side of the packer 20. The secondary grout SG is injected only into the gap. Such injection is performed by the packer 20 and the connecting piece 40, the connecting piece 40 and the fixing body 13, and the fixing body 13 and the bearing ring 5.
0 is possible because it is screwed while maintaining watertightness. At the time of injecting the secondary grout SG, the secondary exhaust pipe 34
The air is discharged to the outside of the anchor insertion hole H. Therefore, it becomes possible to coat the outer surface of the PC steel strand 11 with the secondary grout SG. In addition, such injection is
This is possible because the opening of the anchor insertion hole H is closed by the girder 7.

Next, a door body fixing method using the upward hole door body fixing anchor 10 configured as described above will be described.

First, as shown in FIG. 19, after the steel pipe 19 is fitted into the anchor insertion hole H formed in the bank 3, the girder 7 having the opening 7a at the position corresponding to the anchor insertion hole H is installed. Temporarily fix. The holes 7a may be formed at the time of molding the girder 7, or may be drilled later.

Then, as shown in FIG. 20, the upward hole door fixing anchor 10 is inserted into the anchor insertion hole H.

Then, as shown in FIG. 21, air is pressure-fed from the air pipe 21 to expand the packer 20,
The gap between the anchor insertion hole H and the hole wall is closed.

Next, as shown in FIG. 22, while the gas is being exhausted from the primary exhaust pipe 32, the primary grout FG is injected from the primary grout injection pipe 31 through the primary injection hole 41, whereby the front end side apartment 12 The primary grout FG is filled in the gap between the outer surface of the fixing body 13 and the hole wall of the anchor insertion hole H.

Next, as shown in FIG. 23, after the required strength is developed in the primary grout FG, air is deflated by the air pipe 21 from the packer 20 and contracted, and the PC steel strand 1
1 is tensioned and fixed to the girder 7 by a fixing tool (reference numerals 15 to 18). In addition, during such fixing, the air pipe 21, the primary grout injection pipe 31, and the primary exhaust pipe 32
Is cut so that the end portion is in the anchor insertion hole H. In addition, a gap is formed in advance between the girder 7 and the pressure support plate 15, and the secondary grout injection pipe 33 and the secondary exhaust pipe 34 are drawn out from the gap.

Then, as shown in FIG. 24, the gap between the inner surface of the front end condominium 12, the connection piece 40 and the packer 20 and the outer surface of the PC steel stranded wire 11, and the hole wall of the anchor insertion hole H and the PC steel. The secondary grout SG is injected from the secondary grout injection pipe 33 into the gap between the outer surface of the stranded wire 11 and the secondary exhaust pipe 34. By such a process, the outer side surface of the PC steel strand 11 is coated with the secondary grout SG.

Then, the temporary fixing is removed.

As described above, the upward hole door fixing anchor 10 can be fixed to the bank 3 and the girder 7 can be fixed to the bank 3. In the door fixing method, the girder 7 is inserted before the upward hole door fixing anchor 10 is inserted.
However, the girder 7 may be temporarily fixed to the bank 1 after the upward hole door fixing anchor 10 is inserted.

Next, the effect of the upward hole door fixing anchor 10 will be described.

Since the secondary grout SG covers the PC steel wire 11, the corrosion of the PC steel wire 11 can be prevented. Therefore, it becomes unnecessary to apply grease or the like to the PC steel wire 11. As a result, brittle fracture of the PC steel wire 11 can be prevented. Further, it is not necessary to coat with polyethylene resin. As a result, it is possible to prevent the propagation of microorganisms, the deterioration of the coating, and the corrosion and breakage of the PC steel wire 11.

Further, since cement milk similar to that of the primary grout FG can be used for the secondary grout SG having the purpose of preventing rust, the construction can be easily carried out without preparing a special rust preventive material. be able to.

Further, since the tip of the primary grout injection pipe 31 is located on the base end side (downward) of the portion filled with the primary grout FG, and is located below the PC steel strand 11, the primary grout is provided. The FG can be completely filled. Also,
Since the tip of the primary exhaust pipe 32 is located on the tip side (upper side) and is located above the PC steel wire 11, the primary grout F
When filling G, the front-end condominium 12 and the fixing body 1
The air existing in the gap between the outer side surface of the anchor 3 and the hole wall of the anchor insertion hole H can be completely discharged to the outside of the anchor insertion hole H. Further, since the tip of the primary grout injection pipe 31 is screwed to the connection piece 40 and the primary exhaust pipe 32 is fixed to the pilot cap 70, the upward hole door fixing anchor 10 is inserted into the anchor insertion hole H. And grouting (primary grout FG or secondary grout S
When injecting G), the positions of the tips of the primary grout injection pipe 31 and the primary exhaust pipe 32 do not shift. Therefore, the above-described effect that the primary grout FG is surely injected and the exhaust is surely ensured.

The tip of the secondary grout injection pipe 33 is
The base end side (downward) of the portion where the secondary grout SG is injected,
In other words, since it exists on the base end side of the anchor insertion hole H, 2
The injection of sub-grout SG can be completed. Further, since the tip of the secondary exhaust pipe 34 is screwed to the tip side (upper side) of the portion where the secondary grout SG is injected, that is, the bearing ring 50, such exhaust can be performed completely. . Further, since the tip of the secondary exhaust pipe 34 is screwed to the bearing ring 50, the secondary exhaust pipe is inserted when the upward hole door fixing anchor 10 is inserted into the anchor insertion hole H and when grouting. The position of the tip of 34 does not shift. Therefore, the effect that the secondary grout SG can be injected and the exhaust can be reliably performed is ensured.

Further, the packer 20 and the connection piece 40, the connection piece 40 and the fixing body 13, and the fixing body 13 and the bearing ring 5
Since 0 is screwed while maintaining watertightness, the primary grout FG does not enter the fixing body 13. Also, when the secondary grout SG is injected, the secondary grout S
G does not leak outside the fixing body 13.

Further, the primary exhaust pipe 3 is provided by the spacer 60.
The positioning of the secondary exhaust pipe 34 and the secondary exhaust pipe 34 can be reliably performed.

Further, the connection piece 40 has a primary injection hole 4
1, the primary connection hole 42 and the secondary connection hole 43 are provided, and the primary grout injection pipe 31, the primary exhaust pipe 32, and the secondary exhaust pipe 34 are separately connected to them, so that the connection piece 40
It fits nicely around.

Further, since the bearing ring 50 is formed with the fitting groove 52 and the primary exhaust pipe 32 is fitted in the fitting groove 52, the fitting around the bearing ring 50 is good.

Further, even if the nut 17 is loosened or the relaxation of the PC steel wire 11 occurs, the tension force is maintained by the secondary grout SG. In such a case, a compressive force is applied to the hardened secondary grout SG, and cracking can be prevented.

Further, the steel pipe 19 can prevent the hole wall of the anchor insertion hole H from collapsing, and can completely block the packer 20.

The door hole fixing anchor 10 for upward holes according to the present embodiment is used for the anchor insertion hole H which is formed in a diagonally upward direction from the base end to the tip.
In the case of the anchor insertion hole drilled diagonally downward, the tip of the primary grout injection pipe is located at the tip of the anchor insertion hole, and the tip of the primary exhaust pipe is located at the base end side of the fixing unit 10a. A door body fixing anchor for the upward hole is configured so that the tip of the secondary grout injection pipe communicates with the inside of the end portion of the fixing body on the tip end side, and the tip of the secondary exhaust pipe is located closer to the base end side than the packer 20. Use the one. Such a configuration can also be realized by the upward hole door fixing anchor 10. That is, the primary grout injection pipe 31 and the secondary grout injection pipe 3
3 is on the upper side of the wire 11 from the PC steel, the primary exhaust pipes 32 and 2
The upward hole door fixing anchor 10 having the above structure is inserted so that the next exhaust pipe 34 is located below the PC steel wire 11. Then, the primary grout FG is injected from the primary exhaust pipe 32 while performing the exhaust from the primary grout injection pipe 31. Next, the secondary grout SG is injected from the secondary exhaust pipe 34 while exhausting the secondary grout injection pipe 33. By such injection and exhaust, the same effect as that of the present embodiment can be obtained when fixing the upward hole door fixing anchor 10 in the downward anchor insertion hole. The upward hole door body fixing anchor 10 according to the present embodiment can correspond to a downward anchor insertion hole. Note that, in the horizontal anchor insertion hole H, as in the present embodiment,
In order that the primary grout injection pipe 31 and the secondary grout injection pipe 33 are located below the PC steel wire 11 and the primary exhaust pipe 32 and the secondary exhaust pipe 34 are located above the PC steel wire 11,
The door hole fixing anchor 10 for the upward hole is inserted into the anchor insertion hole H, and the primary exhaust pipe 32 and the secondary exhaust pipe 34 are exhausted while the primary grout injection pipe 31 and the secondary grout injection pipe 33 to 1 Next grout FG and second grout SG are separately injected.

Although the PC steel stranded wire 11 is used as the tension material, a tension material suitable for carrying out the present invention, such as a PC steel rod or a deformed steel rod, can be used.

The primary grout FG and the secondary grout S
As G, cement milk, mortar and the like suitable for carrying out the present invention can be used.

Further, the upward hole door fixing anchor 10 can be used as a ground anchor. In such a case, even if the PC steel strand 11 is cut on the base end side of the fixing portion 10a, the tension is maintained by the secondary grout SG, so that the ground can be stabilized.

Further, the number, position, shape, etc. of the above-mentioned constituent members are not limited to the above-described embodiment, but can be set to suitable numbers, positions, shapes, etc. for carrying out the present invention.

In the above figure, the same components are designated by the same reference numerals.

[0065]

Since the present invention is configured as described above, the following effects can be obtained.

Since the secondary grout covers the tendons, it is possible to prevent the tendons from corroding. Therefore, it is not necessary to apply grease or the like to the tension material. As a result, brittle fracture of the tendons can be prevented.

Further, it is not necessary to coat with a polyethylene resin. As a result, it is possible to prevent the propagation of microorganisms, the deterioration of the coating, and the corrosion and breakage of the tendons.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a dam.

FIG. 2 is a perspective view of a door body.

FIG. 3 is a conceptual plan view showing a state where the door body is fixed to the bank by an upward hole door body fixing anchor.

FIG. 4 is a vertical cross-sectional view of a door body fixing anchor for an upward hole.

5 is a sectional view taken along the line aa in FIG.

6 is a sectional view taken along line bb of FIG.

7 is a sectional view taken along line cc of FIG.

8 is a sectional view taken along line d-d of FIG.

FIG. 9 is a front view of a connection piece.

10 is a sectional view taken along line ee of FIG.

FIG. 11 is a rear view of the connection piece.

FIG. 12 is a cross-sectional view of a connection piece showing a state where a packer and a fixing body are connected.

FIG. 13 is a front view of a bearing ring.

14 is a cross-sectional view taken along line f-f of FIG.

FIG. 15 is a rear view of the bearing ring.

FIG. 16 is a cross-sectional view of a bearing ring showing a state in which a fixing body is connected.

FIG. 17 is a front view of a pilot cap.

FIG. 18 is a sectional view of a pilot cap.

FIG. 19 is a process drawing of a construction method using an upward hole door fixing anchor.

FIG. 20 is a process drawing of the construction method using the upward hole door fixing anchor.

FIG. 21 is a process drawing of a construction method using an upward hole door fixing anchor.

FIG. 22 is a process drawing of the construction method using the upward hole door fixing anchor.

FIG. 23 is a process drawing of a construction method using an upward hole door fixing anchor.

FIG. 24 is a process drawing of a construction method using an upward hole door fixing anchor.

[Explanation of symbols]

 G Gate H Anchor insertion hole B Base end side T Tip side FG Primary grout SG Secondary grout 1 Door body 2 Outlet pipe 3 Bank body 4 Skin plate 5 Leg column 6 Trunnion hub 7 Girder 7a Opening hole 10 Door body for upward hole Fixed anchor 10a Fixing part 11 PC steel stranded wire 12 Front side condominium 13 Fixing body 14 Base side condominium 15 Liner 16 Spherical seat plate 17 Nut 18 End plug 19 Steel pipe 20 Packer 21 Air pipe 22 Inner pipe 31 Primary grout injection pipe 32 Primary exhaust pipe 33 Secondary grout injection pipe 34 Secondary exhaust pipe 40 Connection piece 41 Primary injection hole 42 Primary connection hole 43 Secondary connection hole 44 Plug screw 45 Socket for connection piece 50 Bearing ring 51 Secondary exhaust Hole 52 Fitting groove 53 Plug screw 60 Spacer 70 Pilot cap 71 Fixing groove 72 Fixing Ingredient

Claims (11)

[Claims] 1. A tension member to be inserted into the anchor insertion hole inside the anchor insertion hole formed in the dam body of the dam, and an inner diameter of the anchor insertion hole provided at the tip of the tension member. A condominium on the tip side having an outer diameter smaller than that of the condominium on the base side of the condominium on the tip side through a bearing ring,
A door for an upward hole having an outer diameter smaller than the inner diameter of the anchor insertion hole and having a fixing body into which the tension member is inserted, for fixing a door body provided to a discharge gate of a dam to a bank body. A body fixing anchor, which is connected to the base end side of the fixing body via a connection piece,
A packer that closes the space between the tension member and the hole wall of the anchor insertion hole only in an expanded state, an air pipe that expands and contracts the packer, and a tip located closer to the tip side than the packer, and the tip side A primary grout injection pipe for injecting primary grout into a gap between the outer surface of the condominium and the fixing member and a hole wall of the anchor insertion hole; a tip located on a tip side of the packer; A primary exhaust pipe that discharges air existing in the gap between the outer surface of the tip side condominium and the fixing body and the hole wall of the anchor insertion hole when the air is injected, to the outside of the anchor insertion hole; A gap between the connecting piece and the inner surface of the packer and the outer surface of the tension member, and the outer surface of the tension member and the hole wall of the anchor insertion hole that are present on the base end side of the packer. The secondary grout is injected only into the gap of
A secondary grout injection pipe for covering the outer surface of the tension member with a secondary grout; and an inner surface of the fixing body and inner surfaces of the connection piece and the packer when the secondary grout is injected.
An air existing in a gap between the tension member and an outer surface thereof, and a secondary exhaust pipe discharging air existing in a gap between the hole wall of the anchor insertion hole and the outer surface of the tension member to the outside of the anchor insertion hole. A door body fixing anchor for the upward hole characterized by being provided. 2. The tip of the primary grout injection tube is located at the base end side of the fixing portion, the tip of the primary exhaust tube is located at the tip of the anchor insertion hole, and the tip of the secondary grout injection tube is located. Is located on the base end side of the packer, and
2. The door hole fixing anchor for an upward hole according to claim 1, wherein a tip of the secondary exhaust pipe communicates with an inside of a tip side end portion of the fixing body. 3. The connection piece has a primary injection hole penetrating from a proximal end side to a distal end side, which communicates with a gap between the outer surface of the front end side condominium and the fixing body and a hole wall of the anchor insertion hole. The tip of the primary grout injection tube is provided in the primary injection hole, and the tip of the primary grout injection tube is attached.
Door body fixing anchor for the upward hole described. 4. The connection piece is provided with a primary connection hole and a secondary connection hole penetrating from a base end side to a tip side, and the primary exhaust pipe is connected to the primary connection hole, The door body fixing anchor for an upward hole according to claim 2, wherein the secondary exhaust pipe is connected to a secondary connection hole. 5. The primary injection hole according to claim 3, and 7.
The door body fixing anchor for an upward hole according to claim 2, wherein the primary connection hole and the secondary connection hole are provided on the opposite side in the radial direction of the tension member. 6. The bearing ring is provided with a secondary exhaust hole penetrating from the end face on the base end side to the inner side surface, and the tip of the secondary exhaust pipe is connected to the secondary exhaust hole. The door body fixing anchor for the upward hole according to claim 2. 7. The door for an upward hole according to claim 2, wherein the bearing ring is provided with a fitting groove continuous in the axial direction, and the primary exhaust pipe is fixed to the fitting groove. Body fixing anchor. 8. The pilot cap provided at the tip of the tip side apartment is formed with a fixing groove continuous in the axial direction, and the tip portion of the primary exhaust pipe is fixed to the fixing groove. The door body fixing anchor for the upward hole according to claim 2. 9. The tips of the primary exhaust pipe and the secondary exhaust pipe in the state where the upward hole door fixing anchor is fixed in the bank so as to extend obliquely from the base end toward the tip. 2. The pipe is located above the tendons, and the tips of the primary grout injection pipe and the secondary grout injection pipe are arranged so as to be located under the tendons.
Door body fixing anchor for the upward hole described. 10. A door body fixing method using a door body fixing anchor for an upward hole according to claim 1, for fixing a door body provided to a discharge gate of a dam to the dam body. Forming an anchor insertion hole; inserting the upward hole door fixing anchor according to claim 1 into the anchor insertion hole; pumping air from the air pipe to expand the packer; Closing the gap between the anchor insertion hole and the hole wall, and injecting the primary grout from the primary grout injection pipe while exhausting from the primary exhaust pipe, whereby the front-end-side condominium and the fixing Filling the gap between the outer surface of the body and the hole wall of the anchor insertion hole with the primary grout, and after the required strength is developed in the primary grout, the tension member is tensioned, and the door body of the gate is Rotatably fixed Fixing the proximal end of the tension member to the garter, and after this step, the tip side apartment, the gap between the inner surface of the connection piece and the packer and the outer surface of the tension member, and the anchor insertion hole. By injecting secondary grout from the secondary grout while exhausting from the secondary exhaust pipe only into the gap between the hole wall and the outer surface of the tension material, the outer surface of the tension material is removed by the secondary grout. A door body fixing method using a door body fixing anchor for an upward hole, comprising a covering step. 11. The door gate fixing structure for an outlet gate using the door fixing anchor for an upward hole according to claim 1, wherein the door provided on the discharge gate of the dam is fixed to the bank body via a girder. A steel pipe is inserted from the base end side of the anchor insertion hole to at least the packer, and a primary grout is filled in a gap between the outer surface of the front end side apartment and the fixing body and the hole wall of the anchor insertion hole, A secondary grout is filled in the tip side apartment, the gap between the inner surface of the connection piece and the packer and the outer surface of the tension member, and the gap between the hole wall of the anchor insertion hole and the outer surface of the tension member, A door body fixing structure for a discharge gate, wherein an outer surface of the tension member is covered with a secondary grout, and a base end of the tension member is fixed to the girder.