JPH0886090A - Method and equipment for placing concrete in construction of steel-framed reinforced concrete-built underground continuous wall - Google Patents

Abstract

PURPOSE: To improve operationability by a method wherein the inside of a hopper. to which a plurality of outlet pipes are disposed, is supplied with freshly mixed concrete, tremie pipes arranged at every partition site by steel frames are connected to a placing chute, a console panel is operated and the quantity of concrete placed is adjusted. CONSTITUTION: A hopper 1 is supplied with freshly mixed concrete, and freshly mixed concrete is stored temporarily in the hopper 1. The assembled articles of reinforcing bars 17 and steel frames 14 are built into a deep groove as reinforcing materials at that time, and tremie pipes 8 are disposed at every approximately intermediate site of partitions parted by H-steel 14. The upper ends of each tremie pipe 8 are connected discretely through placing chutes 6, and a console panel 2 is operated and the placing-quantity adjusting boards 3 for outlet pipes 5 are opened. The tremie pipes 8 are supplied with freshly mixed concrete from the placing chutes 6, and the hopper 1 is rocked and placing operation is advanced smoothly. The quantity of concrete placed is adjusted by opening and closing the adjusting boards 3 by the remote control of the console panel 2 at that time, and a proper quantity of freshly mixed concrete is deposited surely at the place of the construction of an underground continuous wall 15 in the deep groove. Accordingly, payroll is reduced, and the SRC underground continuous wall 15 having high quality can be built.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pouring method and apparatus for constructing a steel reinforced concrete (hereinafter referred to as SRC) underground continuous wall.

[0002]

2. Description of the Related Art In the conventional method of placing concrete on an SRC continuous underground wall, since a steel frame (H-shaped steel) vertically partitions the inside of a deep groove, one tremie pipe is installed between each steel frame. The concrete is placed at a stretch at the same time, one unit at a time. In order to equalize the amount of concrete poured, one fresh concrete mixer truck usually approaches each tremie pipe to supply and pour concrete. However, the pouring work cannot be started until all the concrete mixer trucks of the same number as the tremie pipes arrive and the concrete can be supplied, and there is a space for the arrived multiple concrete cement trucks to gather at once. Must be secured.

Therefore, the applicant has previously filed Japanese Patent Application Laid-Open No. 6-136.
A method for placing concrete in constructing an SRC underground continuous wall described in Japanese Patent No. 952 was devised. The method is shown in Figure 3.
As illustrated in FIG. 2, a hopper body b that is long enough to receive and store fresh concrete in the lateral direction, and a plurality of exits of the fresh concrete in the hopper body b that are laterally spaced from each other are provided. In the placing hopper a configured with the placing port c provided with the quantity adjusting plate d, the ready-mixed concrete mixer truck j
Etc. to supply ready-mixed concrete. One tremie pipe h is arranged in a portion of the SRC underground continuous wall k partitioned by the steel frame f, and each tremie pipe h is placed in each of the plurality of the placing ports c in the placing hopper a. One by one through e, the operator manually opens the pouring amount adjusting plate d to supply the fresh concrete from the pouring port c to the tremie pipe h, and S
Placing ready-mixed concrete in the construction position of RC underground continuous wall k.

[0004]

[Problems to be Solved by the Invention] Japanese Patent Laid-Open No. 6-13
In the concrete placing method according to No. 6952, the fresh concrete mixer trucks j that have arrived supply the fresh concrete one by one into the hopper body b so that the concrete can be sequentially placed, and a particularly wide side-by-side space is not required. However, since the operating amount of the setting amount adjusting plate d has to be opened and closed by the workers approaching each of the setting ports c one by one, the work efficiency is poor. The labor cost is high because the number of workers is almost the same. In addition, there is a concern that the amount of ready-mixed concrete may vary depending on whether the operator opens or closes the amount-of-pour adjustment plate d, resulting in lack of accuracy.

Therefore, the object of the present invention is to solve the problems described above.
By further improving the concrete pouring method according to No. 136952, automation of opening and closing of the pouring amount adjusting plate for adjusting the pouring amount of ready-mixed concrete and remote control are achieved, resulting in significant labor saving and labor cost reduction. It is an object of the present invention to provide a concrete pouring method and a pouring apparatus for achieving a high quality SRC underground continuous wall by accurately adjusting the pouring amount of green concrete.

[0006]

[Means for Solving the Problems] As a means for solving the above problems, a concrete pouring method for constructing an SRC underground continuous wall according to claim 1 is a concrete pouring method for constructing an SRC underground continuous wall, (A) When viewed in a plan view, the shape is sufficiently long in the lateral direction, and fresh concrete is supplied and stored in a hopper 1 provided with a plurality of outlet pipes 5 at intervals in the lateral direction by using a fresh concrete mixer truck or the like. (B) One tremie pipe 8 is provided for each site partitioned by a plurality of steel frames 14 forming the underground continuous wall 15 in the ditch, and each tremie pipe 8 is connected to the outlet pipe 5 by striking. Connect one to each installation chute 6, (C)
Each of the outlet pipes 5 is provided with a placement amount adjusting plate 3, and each placement amount adjusting plate 3 is driven by an air cylinder 4 which operates according to an instruction of the operation panel 2, and the operation panel 2 is operated to perform the placement operation. The opening and closing and the opening of the quantity adjusting plate 3 are automatically controlled, and the pouring amount of the fresh concrete supplied from the pouring chute 6 to the tremie pipe 8 through the outlet pipe 5 is adjusted to supply the fresh concrete to the construction position of the underground continuous wall 15. It is characterized by placing.

Further, the concrete pouring device for constructing the SRC underground continuous wall according to claim 2 has a plurality of outlet pipes 5 which are laterally spaced apart from each other in the hopper 1 which is long enough to receive and store fresh concrete. Each outlet pipe 5 is provided with a driving amount adjusting plate 3 directly connected to an air cylinder 4 which operates according to the instruction of the operation panel 2, and the outlet pipe 5
A pouring chute 6 is attached to the tip of the rotatably rotatably in the vertical direction, and the opening and closing of the pouring amount adjusting plate 3 and the opening of the pouring amount adjusting plate 3 are automatically controlled by the operation of the operation panel 2 to put an appropriate amount of fresh concrete. It is characterized in that it is installed through 6.

The concrete pouring device of claim 3 is characterized in that a vibrator 10 for swinging the hopper 1 is installed on the hopper 1 of claim 2.

[0009]

When the operation panel 2 is operated, the pistons 4a of the individual air cylinders 4 are individually contracted or extended, and accordingly the driving amount adjusting plate 3 is moved vertically to move the adjusting plates 3a and 3b. Is automatically opened or closed or the opening is adjusted. As for the opening / closing of the setting amount adjusting plate 3, the setting amount adjusting plates 3 of the outlet pipes 5 can be opened / closed simultaneously or individually by remote operation of the operation panel 2, so that the operability and accuracy are excellent and the work efficiency is high. Be improved.

As a result of accurately controlling the adjustment of the opening and closing of the pouring amount adjusting plate 3, an appropriate pouring amount of fresh concrete is poured at the construction position of the underground continuous wall 15 to construct a high quality SRC underground continuous wall. it can.

[0011]

EXAMPLE An example of the present invention shown in the drawings will be described below.
FIG. 1 shows a concrete pouring device for constructing an SRC underground continuous wall in the manner illustrated in FIG. 3B. The hopper 1 that receives and stores the fresh concrete supplied from the concrete mixer truck has a rectangular planar shape that is long enough in the lateral direction (FIG. 1A), and has a wide mouth 1a and the fresh concrete that stores and exits. Sloped bottom 1 to guide
b (see FIG. 1B). The lateral length of the hopper 1 is, for example, a pitch (about 90 to 9) corresponding to the interval between the four steel frames (H-shaped steel) 14 ...
The length is such that four (plural) pouring ports (outlets) for ready-mixed concrete can be provided at intervals corresponding to the positions of the four tremie pipes 8 ...

Outlet pipes 5 having a pouring amount adjusting plate 3 are fixedly installed at the pouring ports of the fresh concrete. At the tip end opening of the outlet pipe 5, a half-split cylindrical placing chute 6 is attached rotatably in the vertical direction by inserting a chute suspension shaft 13 into its shaft hole 6a. As shown in FIG. 1B, the casting chute 6 is connected to the tremie pipe 8 via the tremie pipe chute 7 mounted on the pedestal 9 at the upper position of the tremie pipe 8 to transfer the fresh concrete to the tremie pipe 8. Supply. The rotational movement of the placing chute 6
Usually done manually. This placing chute 6
It can also swing in the left-right direction within a range of about 10 °, so that the tremie tube 8 can be easily disconnected and reconnected (Fig. 1).
(See the lower figure of A).

The pouring amount adjusting plate 3 is moved up and down to change the opening area of the exit of the fresh concrete in the exit pipe 5, to adjust the amount of fresh concrete supplied from each pouring chute 6, and the tremie. It is used as a sluice valve to stop the flow of ready-mixed concrete when the pipe 8 is disconnected or reconnected. The driving amount adjusting plate 3 is directly connected to the air cylinders 4 which are independently provided. As shown in FIG. 2, the lower end of the cylinder body of the air cylinder 4 is rotatably installed on the frame of the driving device by a pin 4b, and the upper end of the vertically moving piston 4a is driven by the driving amount. The lower part of the adjusting plate 3 is connected by a pin 4c. The air cylinders 4 are respectively connected to the operation panel 2 shown in FIG. 1, and a hydraulic control circuit that operates according to an instruction from a push button switch of the operation panel 2 is configured. When the piston 4a of the air cylinder 4 is moved up and down by the button operation of the operation panel 2, the placement amount adjusting plate 3 is opened and closed at a desired opening degree in the up and down direction. The operation panel 2 can open and close each of the placement amount adjusting plates 3 simultaneously or individually, or can automatically rotate the placement chute 6 vertically and horizontally. In addition, as shown in FIG. 1, the operation panel 2 is attached to the concrete placing device, or
Alternatively, it is used by freely selecting it to be installed in a remote place and operated remotely.

In the figure, reference numeral 10 is a rod-shaped or form vibrator that is installed below the hopper 1 and swings the hopper 1, and reference numeral 12 is a compressor connected to each air cylinder 4. Next, a concrete pouring method of the SRC underground continuous wall 15 using the concrete pouring device will be described.

As a procedure of the method for constructing the SRC underground continuous wall 15, the fresh concrete mixer truck (not shown) that arrived at the site on the left side in FIG. 1 does not need to wait in line, and the fresh concrete is immediately hoppered. Supply to 1.
The supplied ready-mixed concrete is temporarily stored in the hopper 1. In addition, in the deep groove of one construction unit excavated while protecting the hole wall with the stabilizing liquid (see the portion indicated by the symbol i in FIG. 3B), the reinforcing bar 17 and the steel frame (H-shaped steel) 14 are used as reinforcing materials. The assembly of is built. And each H-section steel 14
One tremie tube for each intermediate section between partitions
Is installed. The upper end of each tremie pipe 8 is individually connected via the casting chute 6 of the hopper 1. After that, when the air cylinder 4 is operated by operating the operation panel 2 to open the pouring amount adjusting plate 3 of the outlet pipe 5, the fresh concrete flows out to the pouring chute 6 and each tremie pipe 8
Supplied to At that time, since the hopper 1 is swung by the vibrator 10, it is possible to promote fluidization of the ready-mixed concrete and smoothly perform the pouring work. Since the amount of ready-mixed concrete supplied can be adjusted by controlling the opening / closing degree of the pouring amount adjusting plate 3 by remote control of the operation panel 2, in particular, freely, it is appropriate for the construction position of the underground continuous wall 15 in the deep trench. A certain amount of ready-mixed concrete is reliably placed. As the concrete pouring progresses, the tremie pipe 8 is gradually pulled up, and the SRC underground continuous wall 15 is constructed. When pulling up the tremie pipe 8, the operation panel 2 is operated to close the pouring amount adjusting plate 3 to stop the outflow of green concrete. The placing chute 6 is moved to the right or left as needed to fold it upward, and then the tremie tube 8 is pulled up. By repeating the above work, solid and proper concrete pouring is completed.

[0016]

EFFECTS OF THE INVENTION According to the concrete pouring method and the pouring apparatus for constructing the SRC continuous underground wall according to the present invention, the fresh concrete mixer truck does not require a wide side-by-side space and the hoppers 1 are arranged one by one. Fresh concrete is easily supplied to. The operation panel 2 automatically controls the opening / closing of the placement amount adjusting plate 3 and, in particular, it can be remotely operated, which is excellent in operability and extremely convenient, and contributes to a great labor saving and labor cost reduction. To do. In addition, a proper amount of fresh concrete is cast solidly, which contributes to the construction of a high quality SRC underground continuous wall.

[Brief description of drawings]

1A and 1B are a plan view and a side view of a concrete pouring device.

FIG. 2 is an enlarged view showing an opening and closing procedure of a placement amount adjusting plate.

3A and 3B are a plan view and a sectional view showing a conventional example.

[Explanation of symbols]

 1 Hopper 2 Operation panel 3 Placing amount adjusting plate 4 Air cylinder 5 Opening / closing device 6 Placing chute 8 Tremy tube 10 Vibrator 14 Steel frame (H-shaped steel)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Fujinaga 4-1-1-13 Honmachi, Chuo-ku, Osaka City Takenaka Corporation Osaka Main Store (72) Inventor Makoto Nagasokabe 4-chome, Honmachi, Chuo-ku, Osaka No. 13 Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Kaoru Hirose 1-6 Shioda-cho, Kochi-shi, Kochi Oyo Motoko Industrial Co., Ltd.

Claims (3)

[Claims] 1. A concrete placing method for constructing a steel reinforced concrete underground continuous wall, comprising: (a) a plurality of outlet pipes having a shape that is sufficiently long in the lateral direction when viewed in plan and that are spaced apart in the lateral direction. Supply and store fresh concrete in a hopper with a fresh concrete mixer truck, etc. (b) Dispose one tremie pipe at each site partitioned by a plurality of steel frames constituting the underground continuous wall in the ditch Each tremie pipe should be connected to each of the driving chutes connected to the outlet pipe, one by one. (C) Each of the outlet pipes has a driving amount adjusting plate, and each driving amount adjusting plate is a control panel. Driven by an air cylinder that operates in accordance with the instructions, and the operation panel is operated to automatically control the opening and closing and the opening of the pouring amount adjusting plate, and the concrete is supplied from the pouring chute to the tremie pipe through the outlet pipe. A concrete pouring method for constructing a steel-framed reinforced concrete underground continuous wall, which comprises pouring fresh concrete at the construction position of the underground continuous wall by adjusting the pouring amount. 2. A plurality of outlet pipes are installed at intervals in the lateral direction of a hopper that is long enough in the lateral direction to receive and store ready-mixed concrete, and each outlet pipe is directly connected to an air cylinder that operates according to instructions from an operation panel. And a driving chute is attached to the tip of the outlet pipe so as to be rotatable in the vertical direction, and the opening and closing and opening of the driving amount adjustment plate are performed by operating the operation panel. A concrete pouring device for constructing a steel-framed reinforced concrete underground continuous wall, characterized by being automatically controlled and pouring an appropriate amount of fresh concrete through a pouring chute. 3. The concrete placing device for constructing a steel reinforced concrete underground continuous wall, wherein the hopper according to claim 2 is provided with a vibrator that swings the hopper.