JP3653298B2 - Pile with bag - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a bag-attached pile constructed by integrally attaching a cloth bag body to the tip of a ready-made pile, and in particular, injecting a solidified fluid such as cement milk or concrete into the cloth bag body. It is related with the pile with a bag which can form an expanded bulb part.
[0002]
[Prior art]
Conventionally, a bag body is attached to the tip of the ready-made pile, and the ready-made pile is set in the ground that has been expanded by the pre-boring method, and then a caking fluid is injected into the bag body to form a solidified bulb. The construction method is known. This construction method is disclosed in, for example, Japanese Patent Laid-Open Nos. 62-215719 and 62-63721.
[0003]
[Problems to be solved by the invention]
Since the bag body of the bag body pile used conventionally as described above is woven into a cylindrical shape by winding the cloth into a cylindrical shape, it has a connecting portion made of a joint stitched with the cloth at least at one place. Met. Accordingly, the pressure resistance when the caustic fluid is injected into the bag is determined by the strength of the connecting portion. Therefore, recently, in order to improve the pressure resistance of the bag body, a pile using a seamless bag body having no connecting portion as shown in Japanese Utility Model Laid-Open No. 1-14235 has been proposed and used.
[0004]
However, since this bag is a straight woven cylinder with the same diameter at the center and both ends, when attaching the bag to a ready-made pile, take tacks at both ends of the bag. After folding to a small diameter near the outer diameter of the ready-made pile, it was necessary to put it on the ready-made pile and attach it with bands from above both ends. For this reason, although the pressure resistance of the bag body is increased, as the bag body expands due to the injection of the caustic fluid, a large force is applied to turn up the band. It was necessary to attach with the tightening force.
[0005]
That is, as shown in FIG. 6, the conventional example has a structure in which a seamless bag 2 is attached to the tip of a ready-made pile 1. In this case, the tack 3 is taken to the upper and lower end portions 2a of the seamless bag 2 made of a straight woven cylinder, and the diameter is squeezed to near the outer diameter of the ready-made pile 1 so as to surround the ready-made pile 1. The upper and lower ends 2 a are covered and bound with a strong force using a band 4. Further, in this structure, when the seamless fluid 2 flows into the seamless bag 2 and the seamless bag 2 expands, a large force is applied to the band 4, so that the band 4 has a high rigidity. Used and the band had to be fastened with a very strong clamping force.
[0006]
The pile with a bag according to the present invention is a completely new technology developed in view of the above-mentioned conventional problems, and is particularly a tubular seamless configured with different diameters at both ends smaller than the center. The present invention provides a completely new technology in which a cloth bag is used, and this seamless cloth bag can be easily attached to the tip of a pre-made pillar with a simple band.
[0007]
[Means for Solving the Problems]
The pile with a bag according to the present invention is an invention in which the above-mentioned conventional problems are fundamentally improved, and the gist of the first invention is that the warp yarns are arranged in a ring and the ring arrangement in the length direction. of which is changed in diameter, weft length in the circumferential corresponding to the diameter of the prefabricated pile is woven in a spiral shape in both end portions, the diameter of the opposite ends thereof in small Kunar so relative size of the central portion A tubular seamless cloth bag woven in different diameters is covered with the outer peripheral surface of the tip of the ready-made pile and both ends of the seamless cloth bag are bound to the ready-made pile through a band. It is a pile with a bag.
[0008]
The gist of the second invention of the present application is characterized in that the diameter of both ends of the seamless cloth bag with respect to the outer diameter of the ready-made pile is +0 to 100 mm, and the diameter of the center part of the seamless cloth bag is +100 to 600 mm. It is a pile with a bag body of 1st invention.
[0009]
[Action]
In the first invention of the present application, the warp yarns are arranged in a ring shape in the first invention, and the diameter of the ring arrangement changes according to the change in diameter, and the length of the circumference in accordance with the diameter of the ready-made pile at both ends. The weft is spirally woven into a seamless cloth bag that does not have joints that are woven differently so that the diameter of both ends is smaller than the diameter of the center. Even if an animal or the like is injected and expanded greatly, the bag body does not break. In addition, since the diameter of both ends of the seamless cloth bag is smaller than the diameter of the central part, when this seamless cloth bag is put on the outer peripheral surface of the tip of the ready-made pile, the ready-made pile is connected to both ends of the seamless cloth bag. Since there is little play between the two, the both ends of the seamless cloth bag can be bound to the ready-made pile without providing a tack or the like.
[0010]
Furthermore, even if the seamless cloth bag is expanded by injecting the solidified fluid into the seamless cloth bag, both ends of the seamless cloth bag have a diameter corresponding to the diameter of the ready-made pile, Since the pressure is not so much, as the seamless cloth bag is inflated, a large force is not applied to the band in which both ends thereof are bound. Therefore, both ends of the seamless cloth bag can be easily bound with a relatively simple band. And even if a seamless cloth bag expand | swells greatly, this seamless cloth bag does not contact the protrusion part of a band, and is not damaged. For this purpose, the seamless fabric bag can be filled with caking fluid at high pressure to greatly expand the seamless fabric bag, thereby maximizing the enlarged bulb portion of the pile and increasing the pile support force. I can do it.
[0011]
In the second invention of the present application, as described above, since the diameter of both ends of the seamless cloth bag with respect to the outer diameter of the ready-made pile is set to +0 to 100 mm, when the seamless cloth bag is covered around the ready-made pile, There are almost no gaps formed between both ends of the bag and the ready-made piles. Therefore, it is not necessary to provide a tack or the like at both ends, and the both ends can be bound to a ready-made pile with a band as it is. Furthermore, since the diameter of the center portion of the seamless cloth bag is set to +100 to 600 mm from the diameter of the ready-made pile, the center portion of the seamless cloth bag is significantly larger than the diameter of the ready-made pile by filling the caking fluid. The diameter of the pile can be increased, which can significantly increase the bearing capacity of the pile.
[0012]
【Example】
FIG. 1 is an external perspective view of the main part of a pile with a bag according to the present invention, and FIG. 2 is a pile with a bag according to the present invention. FIG. 3 is an external perspective view of a seamless cloth bag used in the present invention, FIG. 4 is a front view of the main part showing the band binding state, and FIG. 5 is another example of the band. It is a front view of the principal part which shows the binding state of.
[0013]
In FIGS. 1 to 3, reference numeral 11 denotes a seamless cloth bag used in the present invention. This seamless cloth bag 11 is woven to a different diameter without a connecting portion using an annular loom or the like. Is. An annular loom, for example, weaves warp yarns arranged in a ring and extending in parallel with each other and weft yarns extending in a spiral manner intersecting the warp yarns to form a tubular three-dimensional fabric. The mouth can be arbitrarily changed in a continuous weaving process. In the seamless cloth bag 11 woven using such a circular loom, the warp yarns are arranged in a ring shape, and the diameter of the ring arrangement changes according to the change in diameter, and the weft yarns spiral in the circumferential direction with respect to the warp yarns. Each round of the weft yarn is woven and has a circumference corresponding to the diameter.
[0014]
The outer diameter D1 of the both ends 11a of the seamless cloth bag 11 is the workability when the seamless cloth bag 11 is put on the outer peripheral surface of the ready-made pile 12, and when the seamless cloth bag 11 is expanded by injection of the caking fluid 13 In addition, considering that the force for turning up the band 14 is reduced, +0 to 100 mm, more preferably +20 to 60 mm is appropriate from the outer diameter of the pile. In addition, the outer diameter D2 of the central portion 11b of the seamless cloth bag 11 requires a pile outer diameter of +100 to 600 mm in consideration of the effect of increasing the vertical support force of the ready-made pile 12, and preferably the pile outer diameter +300 to 600 mm. It is.
[0015]
Thus, when the outer diameter D2 of the center part 11b is enlarged, the diameter of the solidified fluid 13 injected into the seamless cloth bag 11 and cured is increased, and an extremely high vertical supporting force can be expressed. Further, the length L1 of the both end portions 11a having the reduced diameter needs to be longer than the width of the band 14. In addition, the length L2 of the enlarged central portion 11b is preferably 1 to 10 times the outer diameter of the pile in consideration of the effect of improving the frictional force of the ready-made pile 12. Further, the tapered portion 11c extending from the both end portions 11a to the central portion 11b may have an arbitrary length as long as there is no problem in the strength and dewaterability of the seamless cloth bag 11.
[0016]
The material of the seamless cloth bag 11 is preferably one using a synthetic fiber such as nylon, polyethylene or vinylon from the viewpoint of having a dehydrating effect of allowing only water in the caking fluid 13 to be injected to permeate and the strength. . When the seamless cloth bag 11 is formed such that the water of the solidified fluid 13 can be dewatered to the outside, the cement-based solidified fluid 13 is injected into the seamless cloth bag 11 attached to the ready-made pile 12 during construction. The moisture in the caking fluid 13 is dehydrated through the surface of the seamless cloth bag 11 at a predetermined pressure, for example, an injection pressure of 6 to 10 kg / cm ² , and the caking fluid 13 is hardened densely and firmly after curing. Become a body.
[0017]
The seamless cloth bag 11 is placed on the outer peripheral surface of the ready-made pile 12, and the reduced-diameter end portions 11a are fixed by a combination of a band 14, an adhesive, a cushion material, and the like. Of the both end portions 11a, a place where the band 14 is fixed is preferably a little away from the tapered portion 11c and the both end portions 11a. When the two ends 11a are fixed, the warp of the central portion 11b extends when internal pressure is applied, and the bulge of the bag of the tapered portion 11c tends to shift the band 14. Therefore, it is preferable that the center portion 11b expanded at a predetermined internal pressure is fixed to a location separated by an amount by which the warp yarn extends.
[0018]
When a metal fitting is used as the band 14 used when the seamless cloth bag 11 is attached, the bolts 15 sandwich the two steel bands 14a from both sides of the seamless cloth bag 11 as shown in FIG. All that is required is manual tightening. Alternatively, when the wire rope band 14b is used, as shown in FIG. 5, it is only necessary to use a wire having a smaller diameter than the conventional one, tighten it with a lower force than the conventional one, and stop with the wire grip 16.
[0019]
In addition, as shown in FIG. 2, if the cushion material 17 is disposed in advance on the seamless cloth bag 11 and the pile outer peripheral surface of the mounting portion, it is safe against leakage of the caking fluid 13. The cushion material 17 is made of a material such as a foamed material such as polyvinyl chloride, polyethylene, or polyurethane, or a rubber that closes a gap between the seamless cloth bag 11 and the outer peripheral surface of the ready-made pile 12 after the band is tightened. It ’s fine. The width of the cushion material 17 is preferably wider than the band width.
[0020]
Moreover, the ready-made pile 12 used for this invention has the injection pipe 18 for inject | pouring the solidified fluid 13 in the seamless cloth bag 11. FIG. As shown in FIG. 2, the injection pipe 18 may be provided in a thick portion of the peripheral wall of the ready-made pile 12, or may be provided in a hollow portion or an outer peripheral surface of the ready-made pile 12. FIG. 2 is an external view when the caking fluid 13 is press-fitted through the injection tube 18 into the seamless cloth bag 11 of the bag-equipped pile according to the present invention. As is apparent from the seamless cloth bag 11 attached in this way as compared with the seamless bag body 2 in FIG. 6 of the conventional example, weft yarns are woven at a circumferential length substantially corresponding to the outer diameter D1 at both ends 11a. Therefore, in this portion, the weft presses the force that the seamless cloth bag 11 tries to inflate, the force for turning up the band 14 by the seamless cloth bag 11 does not act, and a part of the seamless cloth bag 11 is There is no contact with the protrusion.
[0021]
[Example 1]
The ready-made pile 12 used in this example has the hollow structure shown in FIG. A friction cutter 19 is provided below the ready-made pile 12 to protect the seamless cloth bag 11 when the pile is laid down. The ready-made pile has an outer diameter of 600 mm and a pile length of 5 m. Further, an iron pipe having a diameter of 1.5 inch is provided as an injection pipe 18 in the thick wall portion of the peripheral wall of the ready-made pile 12, and the tip of the iron pipe is provided so that a caking fluid 13 can be formed in the seamless cloth bag 11 through the iron pipe. Branched and communicated with the seamless cloth bag 11. The ready-made pile 12 was covered with a seamless cloth bag 11, and both ends 11a were fixed with bands. The seamless cloth bag 11 has the structure shown in FIG. 3 and is woven with different diameters so that both end portions 11a have an outer diameter of 650 mm and the center portion 11b has an outer diameter of 950 mm and no connecting portion. The lengths of the diameter-reduced end portions 11a are 300 mm, the tapered portion 11c is 150 mm, and the enlarged central portion 11b is 2,500 mm. The material was nylon 66.
[0022]
The seamless cloth bag 11 is set after a polyurethane foam having a width of 150 mm and a thickness of 10 mm is wound around the mounting portion of the outer peripheral surface of the ready-made pile 12 as a cushioning material 17, and a 6 mm wire rope 14 b is wound from above. It was tightened with a pulling force of 1000 kg and fixed with a wire grip 16.
[0023]
[Comparative example]
Thus, cement milk was inject | poured in the seamless cloth bag 11 on the ground using the pile with a bag body of this invention as the test body 1, and the pressure resistance test was implemented. Further, the material, strength, and overall length of the bag body are the same as those of the test body 1 with respect to the test body 1, but the overall outer diameter is 950 mm as in the conventional example of FIG. The seamless bag body 2 woven with no joints and having a tack 3 at both ends, reduced in diameter to 650 mm, and a pile attached to the ready-made pile 1 was used as a test body 2 to conduct a pressure resistance test. .
[0024]
As a result, the specimen 1 had a maximum diameter of 12 kg / cm ² and the center part 11b of the seamless cloth bag 11 with an enlarged diameter was broken, and no damage was observed at both ends 11a, whereas the specimen 2 had an injection pressure of 6 kg. / Cm ² , the state shown in FIG. 6 is applied, and the force for turning up the band 4 made of wire rope is applied. The band 4 of the attachment part is turned up, and the cement milk starts to leak from this part, and the maximum is 6.5 kg / cm ² . The test was completed after band 4 was removed.
[0025]
【The invention's effect】
Since the pile with a bag according to the present invention has the above-described structure and action, it has the following great effects.
[0026]
Since a seamless cloth bag is used, there is no connection part due to sewing or the like, and therefore there is no risk of the bag body bursting from the connection part. Therefore, the strength of the bag body can be sufficiently exhibited, and a large amount of caking fluid can be effectively injected. Since the diameter of both ends of the seamless cloth bag is woven smaller than the diameter of the central part, when the seamless cloth bag is put on the outer peripheral surface of the tip of the ready-made pile, the ready-made pile is attached to both ends of the seamless cloth bag. Since there is little play between the two parts, the two ends can be bound to the ready-made pile as they are without providing a tack or the like at both ends of the seamless cloth bag. Even if the bag body expands greatly due to the injection of the caking fluid, the force for turning up the band that binds both ends does not act, so the required strength and tightening force of the band can be significantly reduced. Even if the bag body expands, it does not come into contact with the protruding portion of the band, so there is no risk of the bag body being damaged. Therefore, the bag can be sufficiently expanded in the lateral direction with a high pressure, and a higher pile supporting force can be obtained.
[Brief description of the drawings]
FIG. 1 is an external view of a main part of a pile with a bag according to the present invention.
FIG. 2 is a partial vertical cross-sectional explanatory view of the main part of the bag-attached pile of FIG. 1;
FIG. 3 is an external view of a seamless cloth bag used in the present invention.
FIG. 4 is a front view of a main part showing a band bundling state.
FIG. 5 is a front view of a main part showing a banded state of another example band.
FIG. 6 is an external view illustrating a conventional pile with a bag body.
[Explanation of symbols]
1 Ready-made pile 2 Seamless bag 3 Tack 4 Band
11 Seamless cloth bags
11a Both ends
12 Ready-made piles
12b center
12c Taper part
13 Consolidating fluid
14 bands
14a wire rope
15 volts
16 Wire grip
17 Cushion material
18 Inflow pipe
19 Friction cutter

Claims (2)

The warp yarns are arranged in a ring and the diameter of the ring arrangement changes in the length direction. At both ends, weft yarns are spirally woven with a circumferential length corresponding to the diameter of the pre-made pile , diameter of the both ends of the small Kunar tubular seamless fabric bag woven to different diameters in the radial, the band end portions of the seamless fabric bag with cover the tip outer peripheral surface of the prefabricated pile A pile with a bag, which is formed by binding to a ready-made pile.   The pile with a bag body according to claim 1, wherein a diameter of both ends of the seamless cloth bag is +0 to 100 mm with respect to an outer diameter of the ready-made pile, and a diameter of a center part of the seamless cloth bag is +100 to 600 mm.

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