JP2001207450A - Tremie pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treamie pipe 1, capable of preventing occurrence of turbidity in water, when starting to pour a material to be placed or when interrupting the placement, of falling of the material remained in pipe into water, when moving the trimie pipe to a new plate and also of closing the entire amount of the material left inside the pipe through remote control. SOLUTION: At the upper end portion of the tremie pipe 1, equipped with a taper pipe 8 at the bottom end portion of a straight pipe 8 for placing the material to be poured to the bottom of water, a check valve 6 is installed for bleeding air, which is closed automatically when the material to be placed begins to fall freely inside the pipe by vacuum pressure, and is opened automatically, when the air exceeding atmospheric pressure has to be released from the inside of the pipe, a discharge hole 9 for the material to be placed is provided at the side surface of the taper pipe, a valve body is attached to position above the discharge hole 9 of the taper pipe 8, and the valve body 8 closes the taper pipe 8 or the straight pipe 31 from its inner side, by supplying compressed air to the lower surface of the valve body in this tremie pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tremy tube used mainly for pouring a casting material into which coarse aggregate is not mixed, such as mortar, into water.

[0002]

2. Description of the Related Art Conventionally, when a solidified material is mixed with concrete, earth and sand, or dredged soil to form a kneaded state, and is poured into the water bottom and poured, the poured material is prevented from spreading during falling in water. For this purpose, a tremy tube 1 as shown in FIG. 5 is used.

[0003] In this case, when the casting material fed by the supply hose 2 at the start of the casting falls in the tremy tube 1, the air in the supply hose 2 is compressed and blows out in the water at the same time as the start of the casting. Turbidity occurs due to the rise of bubbles in the air.

[0004] There is also a case where the casting is interrupted due to a failure of the plant for supplying the casting material or the like, and also in this case, the air separated in the supply hose 2 causes the same turbidity of water as described above. There is.

Further, for example, for renovation work of an existing quay,
When this tremy tube is used, the work of moving the tremy tube increases, and in this case, the tremy tube 1 is completely drained. May fall off and pollute the water surface.

[0006]

SUMMARY OF THE INVENTION According to the present invention, at the start of placing a casting material into water using a tremy tube, air compressed in a supply hose blows into the water or the placement of the casting material is interrupted. Sometimes the air separated in the supply hose blows out into the water and does not cause turbidity in the water, and furthermore, the inside of the pipe to prevent the dropping material remaining in the pipe from dropping into the water when moving the placement place of the tremy pipe The present invention provides a tremy tube capable of remotely blocking the entire amount of the remaining casting material.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when a casting material falls freely inside the pipe at the upper end of a tremy pipe having a tapered pipe attached to the lower end of a straight pipe into which the casting material is poured into the water bottom. A check valve for air release is provided, which automatically closes at vacuum pressure and opens automatically to release air above atmospheric pressure in the pipe, and a discharge hole for casting material is provided on the side of the tapered pipe. A tremee pipe in which a valve plug that closes a tapered pipe or straight pipe is attached at a position above the discharge hole of the pipe, and the valve plug closes the tapered pipe or straight pipe from the inside by supplying compressed air to the lower surface of the valve plug. In addition, a valve that opens and closes by pneumatic or fluid pressure is provided at the upper end of a tremy pipe with a tapered pipe attached to the lower end of a straight pipe into which a casting material is poured into the water bottom, and is cast on the side of the tapered pipe To provide a material discharge hole, A tremor in which a valve plug that closes the tapered pipe or straight pipe is installed above the discharge hole of the taper pipe, and the valve plug closes the tapered pipe or straight pipe from the inside by supplying compressed air to the lower surface of the valve plug. Consists of a tube. Moreover, in this case, the valve body is made of a packing and a flexible plate material that expands and contracts due to the injection and discharge of air, and the valve body uses a tremy tube formed of a packing and an air spring.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tremee tube according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of the tremee tube 1 of the embodiment, and FIG. 2 is a side sectional view of a valve body at the bottom of the tremee tube 1 shown in FIG.

The tremy tube 1 is provided with a tapered tube 8 attached to the lower end of a straight tube 31, and a casting material is supplied to the tremy tube 1 from a supply hose (not shown) via a long elbow tube 7. You.

A check valve 6 for venting air is provided at the upper end of the tremy tube 1, and when the casting material left in the tremy tube 1 is in a free fall state, it is automatically turned to a vacuum pressure. When the check valve 6 is closed and the air in the pipe is compressed due to the start of the casting of the casting material, the check valve 6 automatically opens so as to release the air above the atmospheric pressure in the pipe. I have.

Next, in the embodiment shown in FIG. 2, a plurality of slit-shaped discharge holes 9 for a casting material are provided on the side surface of the tapered tube 8, and air is injected into the lower end surface of the tapered tube 8. A valve body 10 having a steel plate 33 mounted thereon is mounted on a flexible plate 32 made of a rubber plate or the like which expands and contracts upon discharge. The three-way cock 18, the pressure gauge 19, the compressed air tank 20, and the pressure reducing valve 21 shown in FIG. By supplying compressed air A supplied from a compressed air source provided on a distant place such as on land made of compressed air via a compressed air hose 12 from an air supply port 13 provided on the lower surface of the valve body 10, FIG. Is switched from the open state of the valve body 10 shown in the right half to the valve closed state in which the valve body 10 closes the tapered pipe 8 from the inside as shown in the left half.

In this embodiment, the valve body is provided with the discharge hole 9.
Although the taper pipe 9 at the upper position is closed, the straight pipe 31 may be closed.

FIG. 4 shows another embodiment of the valve body.

The valve body 10 has a rubber packing 36 attached to the upper end of an air spring 35. The air spring 35 moves up and down by injecting and discharging air. Then, the valve body 10 is attached to the bottom of the tapered tube 8 and a compressed air injection / exhaust hole is provided at the bottom of the air spring 35 to inject and discharge the compressed air. Hole 9
Can be closed. Also in this case, the straight pipe 31 may be closed.

Using the tremy tube 1 constructed as described above, the casting material is cast on the bottom of the water, and while the casting material remains in the tremy tube 1, the tremy tube 1 is lifted and moved in the water. At first, the taper pipe 8 or the straight pipe 31 is closed with the valve element 10 and then the tremee pipe 1 is lifted.
At this time, the cast material in the tremy tube 1 tries to fall freely, but the check valve 6 acts to cause a vacuum in the tremy tube 1 and the cast material in the tremy tube 1 is hard to fall. Thus, the load acting on the valve body 10 is reduced.

In the above embodiments, the check valve 6
In place of the check valve 6, a valve that opens and closes by air pressure or fluid pressure is provided, and the valve is opened when the casting material is cast, and the valve is closed when the tremee pipe 1 is moved. The same operation as the check valve 6 can be obtained.

The tremy tube 1 according to the present invention is not suitable for placing underwater a casting material containing coarse aggregate such as concrete, and does not contain coarse aggregate such as mortar. It can be applied particularly effectively to placing casting materials in water.

[0019]

According to the tremy pipe of the present invention described above, the excess compressed air is released to the atmosphere by the valve provided at the upper end, so that the contamination due to the compressed air at the time of casting is reduced. When lifting the tremy tube and moving it, the valve closes and the cast material remaining in the tremy tube is less likely to fall freely in the tremy tube due to the vacuum effect, so it is hung on the valve body The load can be reduced, and the structure of the valve element can be simplified.

Further, since the valve body can be easily opened and closed by compressed air, remote control becomes possible and safety is improved.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of a tremy tube of the present invention.

FIG. 2 is a side sectional view of a main part cutaway for explaining the function of a valve body at the bottom of the tremee tube of FIG. 1;

FIG. 3 is a layout view of an example of a compressed air source used for closing a valve body at the bottom of the tremee pipe in FIG. 2;

FIG. 4 shows another embodiment of the tremy tube of the present invention;
It is a side view of the principal part fracture for functional explanation of the valve element of the bottom.

FIG. 5 is a side view showing a conventional tremy tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Toremy pipe 6 Check valve 8 Taper pipe 9 Discharge hole 10 Valve body A Compressed air 31 Straight pipe 32 Flexible plate 33, 36 Packing 35 Air spring

Continued on the front page (72) Inventor Hideyuki Hara 5 Yonbancho, Chiyoda-ku, Tokyo Toa Construction Industry Co., Ltd. F-term (reference) 2D045 AA04 BA01 BA05 CA14

Claims (4)

[Claims] 1. When the casting material falls freely in the pipe at the upper end of a tremee pipe having a tapered pipe attached to the lower end of a straight pipe into which the casting material is poured into the water bottom, the casting material is automatically closed by vacuum pressure. In addition to providing a check valve for air release that automatically opens so that air above atmospheric pressure in the pipe is released, a discharge hole for casting material is provided on the side of the tapered pipe, and at a position above the discharge hole of the tapered pipe. A tremee pipe in which a valve plugging a tapered pipe or straight pipe is mounted, and the valve plug closes the tapered pipe or straight pipe from the inside by supplying compressed air to the lower surface of the valve plug. 2. A valve which is opened and closed by air pressure or fluid pressure is provided at an upper end of a tremee pipe having a tapered pipe attached to a lower end of a straight pipe into which a casting material is poured into a water bottom, and is cast on a side face of the tapered pipe. A valve for closing the tapered pipe or straight pipe is installed at a position above the discharge hole of the tapered pipe, and the valve is connected to the tapered pipe or straight pipe by supplying compressed air to the lower surface of the valve. A tremy tube that closes from the inside. 3. The tremy tube according to claim 1, wherein the valve body is formed of a flexible plate material which expands and contracts by packing and discharging air. 4. The tremy tube according to claim 1, wherein the valve body comprises a packing and an air spring.