JPH028435A - Clamping and coupling of member and device thereof - Google Patents

Abstract

PURPOSE:To increase coupling strength by inserting mesh cylinders having a filling bag inside each of them into insertion holes of two members and injecting hardening filler in the inside of each bag by high pressure after fixing both ends of each mesh cylinder to each member. CONSTITUTION:Ends of two members 3 and 4 are joined, and, at the same time, each mesh cylinder insertion hole 5 is placed in series. Then, a mesh cylinder 2 of a mesh cylinder 16 with an anchor put in a bag is inserted into the insertion hole 5, and anchor sections 17 of the ends of the mesh cylinder 16 are placed in the insides of a cutting head conical hole 22 and a recessed section 21. After that, a hardening filler 23 such as mortar, concrete or epoxy resin and the like is filled into the insides of the conical hole 22 and recessed section 21, and it is hardened. A liquid hardening filler 6 is injected and filled into each filling bag 1 of the mesh cylinder 16 through an injection pipe 19 by high pressure to harden and expand.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method and apparatus for tightening and connecting members such as concrete floor slabs, concrete wall panels, and other structural members of buildings. .

[Conventional technology]

Conventionally, as a means for tightening and connecting two members, there is a 15th method.
As shown in the figure and No. 16M, at the connecting ends of the two precast I/concrete members 1112 to be connected,
A recess 13 is provided, and a through hole 14 is provided that extends through each recess 13, and an iron bolt, a metal bolt other than iron, or a plastic bolt is inserted through the through hole 14 of each part tjA'11. , means are known for tightening the respective parts 11,12.

(Problems to be Solved by the Invention) When iron bolts are used in the conventional means for tightening and connecting members, the connection strength is excellent, but the iron bolts corrode under various usage environments, resulting in poor durability. The problem is that it is short. In addition, if metal bolts other than iron are used, the connection strength may be low or the cost may be high (
There is a problem with becoming. Furthermore, when plastic bolts are used, there is a problem in that the connection strength is low.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and device for fastening and connecting members that have high connection strength and excellent corrosion resistance and durability.

[Means to solve the problem]

In order to achieve the above object, in the case of the present invention, a synthetic fiber mesh tube 2 containing a filling bag 1 therein is inserted into the mesh tube insertion hole 5 of the two members 3 and 4, and the mesh tube is inserted into the mesh tube insertion hole 5 of the two members 3 and 4. Fix both ends of 2 to each part t, 11.4, then fill bag 1 as described in 1iii.
The diameter of the mesh tube 2 is expanded by press-fitting a liquid curable filler 6 into the filling bag 1 under high pressure, or by injecting and filling a liquid curable expandable filler 7 into the filling bag 1 and causing it to harden and expand. When expanded, a tension force is generated in the mesh tube 2, and each member 3, 4 is tightened and connected by the tension force of the mesh tube 2.

In addition, in order to improve the expandability of the mesh tube 2 and increase the tension in the longitudinal direction of the mesh tube 2, the mesh tube 2 is composed of a large number of left helical fibers 8 and a large number of right helical fibers 9. do.

[For production]

Both ends of a synthetic fiber mesh tube 2 inserted across the mesh tube insertion holes 5 of the two members 3.4 are fixed to each member 3.4, and placed inside the filling bag 1 housed in the mesh tube 2. The liquid curable filler 6 is press-fitted under high pressure, or the filling bag 1 is
When the liquid cured expandable filler 7 is injected into the inside and hardened and expanded, the diameter of the mesh tube 2 is expanded and the mesh tube 2 is tensioned in the longitudinal direction, and the tension of the mesh tube 2 causes the mesh tube 2 to expand. Each member 3.4 is connected by tightening.

[Example] The invention will now be explained in detail by way of an example.

4 to 7 show an example of a mesh tube 16 with a charging anchor used in an embodiment of the invention, in which a large number of left-handed helical fibers 8 and a large number of left-handed helical fibers 8 and A synthetic fiber mesh tube 2 for introducing tension force consisting of right-handed helical fibers 9 is woven, and fiber bundles or twisted yarns are protruded and extended linearly from both ends of the mesh tube 2 to form an anchor portion 17, A plurality of compartments 10 are provided within the mesh tube 2 and each compartment 10 is divided by a partition member 18.
A filling bag 1 made of a membrane material such as cloth woven from synthetic fibers or the like is housed inside, to which a flexible injection tube 19 and an air outlet 20 are connected. The discharge port 20 is inserted through the mesh of the mesh tube 2.

When providing the partition material 18 in the mesh tube 2, as shown in FIG. 11, after folding an example part of the mesh tube 2 outward to the partition plate mounting position, as shown in FIG. A sheet-like partition 18 woven from a fiber system consisting of bundles or twisted yarns is placed at the folded end of the mesh tube 2, and the periphery of the partition material 18 is attached to the mesh tube 2 using the aforementioned fiber yarn. Then, the folded portion of the net tube 2 is returned to its original position to form the state shown in FIG. 13.

Further, as shown in FIG. 11, after folding an example part of the mesh tube 2 outward to the partition plate mounting position, as shown in FIG. The partition member 18 may be configured by extending in a zigzag shape in the vertical direction and the horizontal direction, respectively.

FIG. 8 shows another example of the mesh tube 16 with a charging anchor, in which a filling bag l made of a woven fabric using an air-permeable filler and an impermeable membrane material, such as Hinilon fiber, is used. Although the discharge port is omitted, the other configuration is the same as that of the mesh tube 16 with a charging anchor shown in FIGS. 4 to 7.

As the synthetic fibers constituting the mesh tube 2 and the anchor part 17, fibers having high tensile strength and excellent corrosion resistance, such as glass fibers, carbon fibers, aramid fibers, etc., are used.

Further, the fibers may be in the form of a non-twisted fiber bundle, a heated fiber bundle, or a linear one in which a plurality of fiber bundles are knitted.

FIGS. 9 and 10 show the vicinity of the connecting part (te) of members used in the embodiment of the present invention, and the connecting end side of two precast concrete members 3.4 to be connected, a recess 21 opening on the surface of the member;
A mesh tube insertion hole 5 extending from the end face of the member toward the four parts 21 side, and a truncated conical anchor hole 22 expanding from the end of the mesh tube insertion hole 5 toward the side surface of the recess 21 are provided. .

When the two members 3 and 4 are to be fastened together using the mesh tube 16 with the charging anchor, first, as shown in FIGS. 1 and 2, the end surfaces of the two members 3 and 4 are With the mesh tube insertion holes 5 connected and arranged in series, the mesh tube 2 of the mesh tube 16 with charging anchors is inserted across each of the mesh tube insertion holes 5, and both ends of the mesh tube 16 with charging anchors are inserted. A large number of anchor portions 17 are disposed within the truncated conical hole 22 and the recess 21 by expanding into a truncated conical shape as they are separated from the mesh tube 2, and in this state,
A curable filler 23 such as mortar concrete or epoxy resin is filled and hardened in each recess 21 and truncated conical hole 22 so as to embed the anchor part 17. 3.4 Anchor part 17
to be fixed.

Next, as shown in FIG. 3, liquid curable filler 6 is press-fitted into each filling bag 1 in the charging anchor-equipped mesh tube 16 under high pressure, for example, 100 to 200 kg/cA, and hardened. Alternatively, by injecting and filling the liquid cured expandable filler 7 into each filling bag 1 in the mesh tube 16 with charging anchors and hardening and expanding it, the diameter of the mesh tube 2 is expanded and expanded. A tension force is generated in the longitudinal direction of the mesh tube 2, and each part 113.4 is tightened and connected by the tension force of the mesh tube 2.

When the two members are fastened by the fastening and connecting method of the present invention, compressive stress is generated at the contact surfaces of the two members. The compressive stress of the joint can be measured by measuring the strain near the contact surface. For this purpose, a strain gauge is attached in advance to the surface near the contact surface or embedded inside.

In this way, when the members are tightened by the member tightening and connecting method of the invention, and a plurality of filling bags 1 are housed in the mesh tube 2, the tightening is performed at each stage. The attachment can be used to measure the saw.

FIG. 9 shows an example of measuring by attaching the strain gauge 23 to the surface of a member. In FIG. 9, 24 is an electric wire for strain measurement connected to the strain gauge 23. In FIG.

When a member is tightened using the method and device for tightening and connecting members of the present invention, the strength of the tightening force is measured, and based on the result, it is determined whether or not increasing the tension is necessary. and additional tension can be applied if necessary. That is,
When three bags 1 as shown in Fig. 2 are stored,
First, when the first bag from the left is filled with filler material, if the tightening force of the member 34 is a predetermined value, there is no need to apply any more tension to the mesh tube 2. 2
Injection of filler into two bags 1 can be omitted. However, when the first bag from the left is filled with filler material, member 3,
If the tightening force of 4 is insufficient to the predetermined value, filler is injected into one of the remaining two bags 1 and the mesh tube 2 is
The tension can be increased. Furthermore, if the tightening force is insufficient to the predetermined value even at this stage, the tension of the mesh tube 2 can be increased by injecting filling +1 into the remaining bags 1.

Above, we have explained the case where three bags 1 are stored.
The number of bags 1 is not limited to three, but as long as a plurality of bags are stored, fillers can be injected in the number of bags 1, and the tension can be increased until a predetermined tension is reached.

When carrying out this invention, a cement-based expandable material containing calcium oxide (CaO), for example, is used as the hardened expandable filler 7 that expands upon hardening.

This calcium oxide-containing cement-based expanding material was adjusted so that the expansion pressure was effectively exerted by controlling the curing rate and expansion rate so that the hydration reaction of calcium oxide progressed gradually and expansion occurred. It is something.

Further, as the curable filler 6 that is liquid and hardens after being injected under high pressure, for example, a liquid material in which an epoxy resin and a polyamine curing agent are mixed immediately before injection is used.

In the case of the above embodiment, a plurality of filling bags 1 are housed in the mesh tube 2, but the number of filling bags 1 housed in the screen tube 2 may be one.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

After fixing both ends of the synthetic fiber mesh tube 2 inserted across the mesh tube insertion holes 5 of the two members 3 and 4 to each member 3.4, the filling bag 1 in the mesh tube 2 is filled with liquid hardening. sexual filler 6
The two members 3.4 are fastened together by a high-strength, non-corrosive connecting means by press-fitting them under high pressure or by injecting and filling the liquid hardening-expandable filler 7 into the filling bag 1 and causing it to harden and expand. Can be attached. Further, by filling the filling bag 1 in the mesh tube 2 with the liquid hardening-expandable filler 7 and causing it to harden and expand, tension can be generated in the mesh tube 2 by a simple means.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the method of the present invention, and FIG. 1 shows a mesh tube with charging anchors inserted into two members, and a part of the anchors at both ends of the mesh tube is inserted into the two members. Fig. 2 is a longitudinal side view showing a part of Fig. 1 enlarged, Fig. 3 is a filling bag filled with a curable filler or a cured expandable filler. FIG. 4 to 7 show an example of a mesh tube with a charging anchor used in an embodiment of the present invention, in which FIG. 4 is a plan view, FIG. 5 is a cross-sectional plan view,
FIG. 6 is an enlarged sectional view taken along the line A--A in FIG. 5, and FIG. 7 is a perspective view showing the shape of the fibers constituting the mesh tube. FIG. 8 is a cross-sectional plan view showing another example of a mesh tube with a charging anchor, and FIG.
FIG. 10 is a perspective view of the two members, and FIG. 10 is a longitudinal sectional side view thereof. FIGS. 11 to 13 are longitudinal sectional side views showing the sequential steps in the case where a partition plate is provided on the screen tube, and FIG. 14 is a front view showing another example where the partition plate is provided on the screen tube. FIG. 815 is a perspective view showing a conventional member tightening connection means, and FIG. 16 is a vertical side view thereof. In the figure, ■ is a filling bag, 2 is a synthetic fiber mesh tube, 3 and 4 are members, 5 is a mesh tube insertion hole, 6 is a hardening filler,
7 is a hardened expandable filler, 8 is a left helical fiber, 9 is a right helical fiber, 16 is a mesh tube with a charging anchor, 17 is a part of the anchor, 18 is a partition material, 19 is a flexible injection pipe, 20 is a An air outlet, 21 is a recess, 22 is a truncated conical hole, and 23 is a hardening filler.

Claims (4)

[Claims] (1) Insert the synthetic fiber mesh tube 2 containing the filling bag 1 into the mesh tube insertion holes 5 of the two members 3 and 4, and insert both ends of the mesh tube 2 into each member 3 and 4. Then, the liquid curable filler 6 is press-fitted into the filling bag 1 under high pressure, and the mesh tube 2 is sealed.
A method for tightening and connecting members in which tension is generated in the mesh tube 2 by expanding and expanding the diameter of the mesh tube 2, and each member 3 and 4 is tightened and connected by the tension of the mesh tube 2. (2) Insert the synthetic fiber mesh tube 2 containing the filling bag 1 into the mesh tube insertion holes 5 of the two members 3 and 4, and insert both ends of the mesh tube 2 into each member 3 and 4. Then, a liquid hardened expandable filler 7 is injected and filled into the filling bag 1, and the hardened expandable filler 7 hardens and expands to expand the diameter of the mesh tube 2. A method for tightening and connecting members, in which a tension force is generated in a mesh tube 2, and each member 3, 4 is tightened and connected by the tension force of the mesh tube 2. (3) The method for tightening and connecting members according to claim 1 or 2, wherein the synthetic fiber mesh tube 2 is constituted by a large number of left-handed spiral fibers 8 and a large number of right-handed spiral fibers 9. (4) A synthetic fiber mesh tube 2 containing the filling bag 1 inside is inserted into the mesh tube insertion holes 5 of the plurality of members 3 and 4, and both ends of the mesh tube 2 are fixed to each member 3 and 4. and said filling bag 1
The mesh tube 2 is radially expanded and expanded by the pressure of the hardening filler filled inside, and is tensioned in the longitudinal direction, and the tension of the mesh tube 2 causes the members 3 and 4 to be tightened and connected. Tightening connection device.