JP4382231B2 - Filling material injection method for joint material for still water - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for injecting a filler for a joint material for waterproofing suitable for sealing between caisson.
[0002]
[Prior art]
Conventionally, when a caisson made of a concrete frame is used, for example, when a dike is formed, a joint between the caisson and the caisson is sealed with a joint material for water stoppage. The waterproof joint material is made by, for example, injecting a filler such as heated asphalt mastic into a hollow cylindrical joint material body made of a flexible material such as rubber.
[0003]
[Problems to be solved by the invention]
The joint material for waterproofing that seals between the caisson is long from the place where the caisson itself is large, and reaches 15 m, for example. For example, as shown in FIG. 8, the seal material body 105 is set along the caisson 101 that is long in the vertical direction and the joint portion 103 of the caisson 101, and the filler 107 is removed from the upper opening of the joint material body 105. Means for injection are taken.
[0004]
At the time of this injection operation, the joint material body 105 under the water surface P set between the caisson 101 and the caisson 101 is crushed by water pressure, so that the specific gravity of the filler 107 injected from above gradually increases. By being expanded against the water pressure, the filling material 107 is injected from the top to the bottom, so that rapid injection cannot be expected and takes time. In particular, in order to let it fall naturally, the blending material 107 needs to be blended so that the specific gravity is 1.9 or more, which causes a problem that the blending is restricted.
[0005]
Further, since the joint material main body 105 is formed in a vertically long shape so as to block the upper part when the filler 107 is injected from the upper opening, the internal air is confined without escaping from the upper side, so that the inner air is trapped. In the present situation, the filler 107 does not easily descend in combination with the water pressure, further delaying the injection time and causing a reduction in work efficiency.
[0006]
Accordingly, an object of the present invention is to provide a method for injecting a filling material for a water-stopping joint so that the filling material can be quickly injected into a joint material for a water-stopping that is long in the vertical direction. .
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, according to the present invention, the upper opening of the hollow cylinder joint material body formed of a flexible material and having a bottom is vertically long and the lower end is close to the bottom of the joint material body. sealed with a lid equipped with a extended air vent pipe and the filling material injection pipe to, using said filler injection pipe filler is injected under pressure from the top to joint fillers in the body, injection time of filling material The filler is injected while exhausting the lower internal air, which is pressed from above, without any escape space, through the air vent pipe.
[0008]
Thereby, a filler is inject | poured in a joint material main body by a filler injection pipe. At this time, together with a filler is forcibly injected by the pressure, the lower part of the internal air with no escape is pressed from above by the filling material during injection, for evacuating to the outside through the air vent pipe, there is no fault smoothly・ Injection work can be performed quickly. In addition, if the specific gravity of the filler is 1.1 or more, injection is possible, and the degree of freedom of blending the filler can be improved. On the other hand, after the injection is completed, the expanded joint material for waterproofing is pressed against the joint part, and even if the caisson moves due to the influence of waves, etc., it will elastically deform following the movement and ensure good sealing performance To do.
[0009]
According to claim 2 of the present invention, the air vent pipe, the filler injection pipe and the lid are removed from the joint material main body after the filler injection is completed.
[0010]
Thereby, it can be used as a joint material for water-stopping without any trouble, and by attaching the lid removed together with each pipe to a new joint material body, it can be used for repeated injection work without waste.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the present invention will be specifically described below with reference to the drawings of FIGS.
[0014]
In FIG. 2, reference numeral 1 denotes a water-stopping joint material 1 that seals a seal hole 7 provided in a joint portion 5 between the caisson 3 and the caisson 3, and the water-stopping joint material 1 is a joint material main body 9. The filling material 11 is injected and filled therein.
[0015]
The joint material main body 9 is made of a flexible material made of impermeable rubber, synthetic resin, or the like, and is formed into a shape of a hollow cylinder having a bottom and a long top and bottom.
[0016]
The upper opening 9a of the joint material body 9 is sealed by a lid 17 having a filler injection pipe 13 and an air vent pipe 15 when the filler 11 is injected as shown in FIG. The lid 17 can be removed together with the pipes 13 and 15.
[0017]
The filler injection pipe 13 is connected in communication with a supply pipe 21 that forcibly feeds the filler 11 by a pump (not shown).
[0018]
The air vent pipe 15 has a vertically long shape, and one lower end portion extends to the bottom of the joint body 9 and the other upper end portion extends outward from the lid 17.
[0019]
The filler 11 can be used alone or in combination with materials such as cement concrete, cement mortar, sand + water, heated asphalt mastic, and room temperature CE slurry.
[0020]
Next, a method for injecting the filler 11 will be described.
[0021]
First, the joint material body 9 that is long in the vertical direction is inserted and set from above into the seal hole 7 provided in the joint part 5 between the caisson 3 and the caisson 3. Next, the upper opening 9 a of the joint material body 9 is plugged with a lid 17 having a filler injection pipe 13 and an air vent pipe 15, and the outer periphery of the lid 17 is fastened by a fastening band 19 from above the joint material body 9. And seal.
[0022]
Next, the filler 11 is forcibly injected from above the joint material body 9 by the filler injection pipe 13. At the time of this injection, the filler 11 is pressed by the filler 1 from above as shown in FIG. 1 while expanding the joint material body 9 under the water surface P against the water pressure by receiving the action of pressure . air in the lower no escape is discharged to the outside through the air vent pipe 15. For this reason, no trouble occurs in the injection operation of filling from the top to the bottom, and the injection of the filler 11 is completed quickly. Moreover, if the specific gravity of the filler 11 is 1.1 or more, the injection becomes possible, so that the degree of freedom in blending the filler 11 can be improved.
[0023]
On the other hand, the waterproof joint material 1 swelled after completion of the filler is pressure-bonded to the seal hole 7 and elastically deforms following the movement of the caisson 3 due to the influence of waves or the like, and has good sealing properties. For a long period of time.
[0024]
4 to 7 show a second embodiment of the filler injection method.
[0025]
The same components as those in the first embodiment will be described with the same reference numerals.
[0026]
First, a joint material body 9 that is long in the vertical direction is formed of a water-permeable material, and is inserted into a seal hole 7 provided in a joint part 5 between the caisson 3 and the caisson 3 and set. Next, after the tip of the filler injection pipe 21 is inserted to the bottom of the joint material main body 9, the filler 11 is injected into the bottom from the tip of the filler injection pipe 21. Hereinafter, as shown in FIGS. 5 and 6, the filler injection pipe 21 is sequentially injected from the bottom upward while being pulled up. At the time of this injection, the joint material body 9 below the water surface P is permeable to water, so that it is not strongly crushed by water pressure, and the internal air and seawater are side walls of the upper opening 9 a and the upper opening 9. Because it escapes from the outside, no major obstacles such as arching occur at the time of injection, and the injection work is completed smoothly and quickly. In addition, if the specific gravity of the filler 11 is 1.1 or more, injection is possible, so that the degree of freedom of blending of the filler 11 is increased.
[0027]
On the other hand, after the injection is completed, the swelled joint material 1 for water stoppage is bonded to the seal hole 7 and elastically deforms following the movement even if the caisson 3 moves due to the influence of waves or the like, and has good sealing properties. For a long period of time.
[0028]
In addition, although the joint material 1 for water stop becomes an embodiment which inserts in the sealing hole 7 provided in the joint part 5, and seals, the caisson 3 moves by the influence of a wave etc., and the joint part 5 is large. In the case of enlargement, it is possible to perform sealing by inserting a joint material for water stop directly into the joint part.
[0029]
It is also possible to form the joint material 1 for water-stopping by installing the joint body 9 on the caisson 3 in advance on land, and after installing these caissons, by implementing this method.
[0030]
It can be applied not only to the joint water-stopping work of concrete caisson, but also to the water-stopping work of the joints of steel sheet piles.
[0031]
【The invention's effect】
As described above, according to the filling material injection method of the present invention, the internal air in the lower part without the escape area pressed from above when the filling material is injected can be discharged to the outside, so that the filling material can be filled smoothly and quickly. be able to. And the improvement of the compounding freedom degree of a filler can be aimed at.
[Brief description of the drawings]
FIG. 1 is an explanatory view at the time of filling a filler according to the present invention.
FIG. 2 is an explanatory diagram when injection is completed.
FIG. 3 is an explanatory perspective view of a part in which a joint material for water stop is inserted and set in a seal hole provided in a joint portion between the caisson and the caisson.
FIG. 4 is an operation explanatory view showing a second embodiment of the filler injection method.
FIG. 5 is an explanatory diagram in the middle of an injection operation of the second embodiment.
FIG. 6 is an explanatory diagram in the middle of the injection operation of the second embodiment.
FIG. 7 is an explanatory diagram when the injection operation according to the second embodiment is completed.
FIG. 8 is an explanatory view at the time of injection operation of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Joint material 9 for water stop Joint body 9a Upper opening 11 Filler 13 Filler injection pipe 15 Air vent pipe 17 Lid

Claims (2)

The upper opening of the hollow cylinder joint material body formed of a flexible material and having a bottom is provided with an air vent pipe and a filler injection pipe whose upper and lower ends are extended to the bottom of the joint material body. and sealed by a lid, wherein the filler material is injected under pressure from above using a filler injection pipe into joint fillers in the body, the lower no escape is pressed from above by the filling material during injection internal air A filling material injection method for a joint material for water-stopping, wherein the filling material is injected while exhausting to the outside through an air vent pipe.   The method for injecting a filling material for water-stopping joint material according to claim 1, wherein the air vent pipe, the filling material injection pipe and the lid are removed from the joint material main body after the filling material filling is completed.

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