JPH063875Y2 - Tremie tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tremie pipe capable of controlling the penetration depth into underwater concrete.

<Conventional technology> When constructing underwater concrete, the underwater concrete is placed through a tremie pipe that connects multiple pipes, and while pulling out the tremie pipe during this placement, the above pipes are removed from the upper end. Such work is repeatedly carried out. In this case, it is important to control the penetration length of the tremie pipe into the underwater concrete in order to prevent the underwater concrete from separating. For this reason, conventionally, the length obtained by subtracting the measuring length of the concrete crown from the tremie pipe length is managed as the penetration length of the tremie pipe.

<Problems to be solved by the invention> However, in such a conventional method of controlling the penetration length of a tremie pipe, these tremie pipe lengths are obtained by subtracting the extracted tremie pipe length from the initial tremie pipe length.
It is necessary to manage this tremie pipe length and measuring length by relying on the memory of field workers, and in some cases, the above penetration length will be calculated incorrectly, and it will not be possible to place high-quality underwater concrete. There were problems such as cases.

This invention was made by paying attention to such a conventional problem, and in managing the penetration length of the tremie pipe into the underwater concrete, the part which relies on the memory of various calculated values by the site worker is reduced, and the underwater concrete is reduced. An object of the present invention is to obtain a tremie tube that can reliably and easily manage the above penetration length into the tube.

<Means for Solving the Problems> In the tremey pipe according to the present invention, a plurality of pipes are separably connected and the length from the lower end of the lowermost pipe is substantially displayed for each unit of the pipe. A display unit is provided.

<Operation> Since the display unit in the present invention is provided for each unit of the pipe, the tremie pipe length, which is a value obtained by subtracting the extracted tremie pipe length from the initial tremie pipe length, is displayed on the pipe at the measurement position. It can be confirmed immediately by reading the entry contents (dimensions). Therefore, the penetration length of the tremie pipe into the underwater concrete can be easily obtained only by the calculation of subtracting the concrete top end measuring length from the read tremie pipe length.

<Embodiment of the Invention> An embodiment of the invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a drill hole provided for constructing a cast-in-place pile or a continuous underground wall. In this drill hole 1, concrete 2 is sequentially poured from the bottom to the top, and tremie is performed. The tube 3 is inserted. 4 is a weight 5 at the lower end
It is a measuring tape with attached, which is used to measure the length to the concrete crown as the concrete crown measuring length. The tremie tube 3 is a plurality of separable 3a
2 are connected in series as shown in FIG.
By connecting the flanges 6 at both ends with a plurality of sets of bolts and nuts a,
It is integrated.

Further, a display portion 8 is provided on the outer circumference of each tube 3a.
As shown in FIGS. 2 and 3, the display portion 8 has a frame member 8a in which, for example, a metal fitting having an L-shaped cross section is formed in a U-shape.
And a pipe length indicating plate 8b which can be attached / detached to / from the frame member 8a. Moreover, the mounting state can be stabilized by using a plate made of a magnet or only a part of the display 8 as a magnet. Further, since the pipe length to be displayed by the display portion 8 of each pipe 3a needs to be from the lower end of the lowermost pipe 3a, the pipe length explicit plate 8b has a length from its lower end to each pipe 3a upper end. The value is entered with the dimension as the length of the tremie tube 3. If the lengths of the tubes 3a are exactly the same, it is possible to use only the sequence number.

FIG. 4 shows another embodiment of the display unit 8. This is each tube 3
Two pins 8b are planted on the outer periphery of a by welding or the like, and a hole 8 is formed in the tube length explicit plate 8b made of magnet.
c is inserted and attached as shown in FIG. The frame member 8a and the pin 8d are not necessarily required when the magnet has a strong suction force. Also, each tube length explicit plate 8b is turned on /
It can also be an off-type magnet base. Further, it is not necessary to limit the positions of the tube length indicating plate 8b on the tube 3a.

Next, a case will be described in which the underwater concrete 2 is placed while controlling the penetration length of the tremie pipe 3 having the above structure. Now, when placing the underwater concrete 2 in the excavation hole 1, connect each pipe 3a to the bolt / nut 7
By connecting the required number of pipes 3a to the frame member 8a of each pipe 3a, and mounting the pipe length indicating plate 8b in which the length from the lower end of the lowermost pipe 3a (the sequence number if necessary) is entered as described above. To do. Therefore, the initial tremie pipe length is written on the pipe length explicit plate 8b of the uppermost pipe 3a.

Next, the tremie pipe 3 thus connected is inserted into the excavation hole 1, and the underwater concrete 2 is filled into the excavation hole 1 through the tremie pipe 3 with the lower end thereof not touching the bottom. In this case, in order to control the quality of the underwater concrete, it is necessary to control the pipe entry length of the tremie pipe 3 in the underwater concrete 2. Therefore, in order to protect this pipe entry length, the tremie pipe 3 is sequentially drawn upward. The bolts and nuts 7 are removed and, if necessary, the bolts and nuts 7 are removed, and the uppermost ones are sequentially removed.

As a result, due to the increase in the underwater concrete 2 and the accompanying pulling out of the tremie pipe 3, the tremie pipe length at the measurement position on the ground gradually becomes shorter, and the value is memorized from the recorded contents on the pipe length explicit plate 8b. You can check directly without relying on it. On the other hand, the concrete crown measuring length can be measured by the measuring tape 4 to which the weight 5 is attached. Therefore, the operator can quickly and accurately obtain the remainder obtained by subtracting the concrete top end measuring length by the measuring tape 4 from the tremie pipe length obtained from the pipe length indicating plate 8b as the penetration length of the tremie pipe 3. become. Then, while maintaining such a penetration length at a controlled predetermined value, pouring of underwater concrete 2 and tremie pipe 3
By further pulling out the concrete, it is possible to optimally place the underwater concrete near the ground and maintain the optimal quality of the underwater concrete.

In addition, in the above embodiment, when numbers are sequentially written on the tube length indicating plate 8b, the tremie tube length can be immediately obtained by mental calculation, and the same result as above can be obtained.

<Result of Invention> As described above, according to this invention, the display unit for substantially displaying the length from the lower end of the lowermost tube is provided for each unit of the plurality of tubes forming the tremie tube. Therefore, the length of the tremie pipe that is pulled out according to the pouring of the underwater concrete can be easily checked without depending on the memory, and therefore the penetration length of the tremie pipe into the underwater concrete can be accurately managed and measured without error. Thus, the effect that the quality of the poured underwater concrete can be maintained optimally can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of use of a tremie tube according to the present invention, FIG. 2 is a front view of an essential part showing a connecting structure of tubes, and FIG. 3 is a sectional view of a display part in FIG. FIG. 4 is a front view of a main part showing another embodiment of the connecting structure of pipes,
FIG. 5 is a sectional view of the display section in FIG. 2 ... Underwater concrete, 3 ... Tremy tube, 3a ...
Tube, 8 ... Display.

Claims (3)

[Scope of utility model registration request] 1. A tremie pipe for pouring underwater concrete in which a plurality of pipes are separably connected to each other, and a display for substantially displaying the length from the lower end of the lowermost pipe for each unit of the pipe. Tremy tube with a section. 2. The tremie tube according to claim 1, wherein the display portion comprises a frame member provided on the outer circumference of the tube and a tube length indicating plate. 3. The tremie tube according to claim 1, wherein the display portion is a magnet plate provided on the outer circumference of the tube.