JP3407144B2 - Method for collecting residual concrete in pipes - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to underground concrete work, and relates to a method of pumping ready-mixed concrete underground through a pressure-feeding pipe. And a method for collecting the same. 2. Description of the Related Art In a concrete work underground, a method is generally used in which a ready-mixed concrete truck is placed on the ground and the ready-mixed concrete is pumped underground through a pipe for pumping. in this case,
At the end of concrete placement, the concrete remaining in the pumping pipe can be recovered by reversing the pump on the ground floor, but in the case of underground, the pressure at the head is larger and the pump is reversed. Cannot be recovered. [0003] In the underground concrete work, especially when there are many underground floors, after the slab is cast,
In many cases, so-called reverse striking, in which a wall or a pillar above the slab is cast. In this case, since the amount of concrete placed cannot be adjusted, all the remaining concrete needs to be separately treated. Therefore, after the casting is completed, the concrete in the ready-mixed concrete truck can be transported separately as it is, but the concrete in the pumping pipe remaining underground is disconnected, the concrete in the pumping pipe is taken out, and the next day, the concrete in the pumping pipe is taken out. Had been carried out and disposed of. [0004] However, in the above-mentioned conventional method, there is a problem that the work of taking out the concrete from the pressurizing pipe and the work of carrying it out to the ground are labor intensive and time-consuming. There is a problem that concrete must be treated as industrial waste. The present invention has been made to solve the above-mentioned problem, and provides a method for easily recovering concrete remaining in a pipe in a system for pumping ready-mixed concrete underground through a pressure-feeding pipe. With the goal. [0006] To this end, the method for recovering residual concrete in a pipe according to the present invention comprises a method of placing concrete underground from a ready-mixed concrete truck 2 and a pump 3 for pumping via a pipe 5 for pumping. In the method of pumping concrete to a position, after the concrete is poured, the pumping pipe 5 is removed from the pump 3 and one end of the water supply pipe 7 is connected to the pump 3 and the other end of the water supply pipe 7 is connected. Is connected to the tip of the pressure feed pipe 5, and water is supplied to the water supply pipe 7 and the pressure feed pipe 5 by the pressure feed pump 3. The numbers added to the above configuration are for comparison with the drawings to facilitate understanding of the present invention,
This does not limit the configuration of the present invention at all. In the present invention, for example, as shown in FIG.
Water is supplied from the water supply pipe 8 to the hopper 4 and the pump 3
When water is driven, water is supplied from the water supply pipe 6 to the tip of the pressure feeding pipe 5, and the concrete remaining in the pressure feeding pipe 5 flows backward and rises, passes through the recovery pipe 6, and returns to the ready-mixed concrete vehicle 2.
Etc. are collected. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of the method for recovering residual concrete in a pipe according to the present invention. FIG. 1 (A) shows the time of placing concrete, and FIG. 1 (B) shows the time of recovering the residual concrete. ing. FIG. 1 (A) shows a concrete casting, 1 is a concrete structure constructed underground,
On the ground surface, a ready-mixed concrete car 2 and a pump 3 for pumping are arranged,
The pump 3 for pumping is connected to a pumping pipe 5 extending underground. The concrete in the ready-mixed concrete car 2 is transferred to the hopper 4 of the pump 3 for pumping, and the pump 3 for pumping sends the concrete to the placing positions a, b, and c via the piping 5 for pumping, and performs the placing operation. FIG. 1B shows a state in which the residual concrete is collected. After the concrete has been poured, the pumping pipe 5 is removed from the pump 3 and the collecting pipe 6 is connected to the removed pumping pipe 5. Also, one end of a water supply pipe 7 is connected to the pump 3 for pumping, and the other end of the pipe 7 for water supply is connected to the pipe 5 for pumping.
Connect to the tip of In the figure, the collection pipe 6 is connected to the ready-mixed car 2, but may be connected to another storage tank. In this state, when water is supplied from the water supply pipe 8 to the hopper 4 and the pump 3 is driven, the water is supplied from the water supply pipe 7 to the tip of the pressure supply pipe 5, and the water is supplied to the pressure supply pipe 5. The remaining concrete flows backward and rises, and is collected by the ready-mixed concrete truck 2 and the like via the collection pipe 6. As is apparent from the above description, according to the present invention, in a system in which ready-mixed concrete is pumped underground through a pressure-feeding pipe, recovery of residual concrete, which has become a problem particularly at the time of reverse striking, is performed. Since it can be easily performed and can be recovered by supplying water, the piping can be simple, and the pump for pressure feeding can be used as it is, and no special device is required. Also, there is no need to treat concrete as industrial waste. Furthermore, since the residual concrete can be collected at the position where the ready-mixed concrete car has been carried in, there is an effect that it is not necessary to separately provide a carrying-in path for the ready-mixed concrete car.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a method of recovering concrete remaining in a pipe according to the present invention.
It is sectional drawing which shows an Example, FIG. 1: (A) shows the time at the time of concrete pumping, and FIG. [Description of Signs] 1 ... concrete structure, 2 ... ready-mixed concrete car, 3 ... pump for pumping, 4 ... hopper 5 ... piping for pumping, 6 ... piping for collection, 7 ... piping for water supply, 8
... water pipe

──────────────────────────────────────────────────続 き Continued on the front page (72) Michio Nakamura, 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Norihiro Nishida 1-2-3, Shibaura, Minato-ku, Tokyo Shimizu Construction Corporation (72) Inventor Seio Shogawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Corporation (56) References JP-A-5-171806 (JP, A) JP-A Sho52 -80623 (JP, A) Japanese Utility Model 557212 (JP, U) Japanese Utility Model 4-59243 (JP, U) Japanese Utility Model 1-167495 (JP, U) (58) Fields surveyed (Int.Cl) . ^7, DB name) B65G 53/32 E04G 21/00 - 21/10

Claims (1)

(57) [Claims] [Claim 1] In a system in which concrete is pumped from a ready-mixed concrete truck placed on the ground surface and a pump for pumping to a concrete pouring position underground via a piping for pumping, after the concrete casting is completed. Removing the pumping pipe from the pump for pumping,
One end of a water supply pipe is connected to the pump for pumping, and the other end of the pipe for water supply is connected to a tip of the pipe for pumping, and the pump for water supply supplies water to the pipe for water supply and the pipe for pumping. A method for recovering concrete remaining in a pipe.