JP3881527B2 - Cement-based fluid distribution device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a steel frame as a core material is preliminarily built in a groove for forming an underground continuous wall excavated by an excavator, and then a cement-based fluid such as concrete, mortar, or soil cement is placed in the groove. The present invention relates to a cement-based fluid distribution device used in a method for constructing a core-preceding underground continuous wall to be cast.
[0002]
[Prior art]
For example, in the SRC underground continuous wall construction method, when placing concrete in a single construction unit groove, a plurality of steel frames previously built in the groove at predetermined intervals partition the groove vertically. Therefore, it is necessary to install one tremy pipe between each steel frame and to place concrete at the same time.
[0003]
In this way, in order to simultaneously place concrete in the groove one construction unit at a time by a plurality of tremy pipes, for example, in the lateral direction as described in JP-A-6-136902 and JP-A-8-86090 It is desirable to form a plurality of outlets equipped with driving amount adjusting plates at predetermined intervals on one side of the long side of the long hopper body, and shoe each outlet.
[0004]
The reason is that when one mixer truck comes close to each tremy pipe and supplies concrete, the placement work starts until all mixer cars of the same number as the number of tremy pipes arrive and concrete can be supplied. This is because it is impossible, and it is necessary to secure a space where multiple mixer trucks arrive at one time.
[0005]
The cement-based fluid distribution device has been devised to eliminate such inconveniences, and can be configured so that the concrete supplied to the hopper body can be uniformly poured into all tremey pipes. is needed. Therefore, in the conventional distribution device, as described in JP-A-8-86090, a vibrator is attached to the lower surface of the hopper body, and vibration is applied to the hopper body. And, by swinging the hopper body by the vibrator, the fluidity of the concrete thrown into the hopper body is increased, the flow into the chute is smoothed, and the concrete piles that are thrown into the hopper body are leveled. And was distributed evenly to each chute.
[0006]
However, it takes a long time for the concrete pile in the hopper body to be leveled only by swinging the hopper body by the vibrator, and the concrete is put in the time from the supply to the hopper body until it reaches the chute. There was a defect that the amount could not be equalized.
[0007]
[Problems to be solved by the invention]
In view of the above-mentioned present situation, the present invention provides a cement that can quickly level the cement-based fluid such as concrete supplied to the hopper body and eliminate the time lag from the supply to the hopper body to the introduction to the chute. A system fluid distribution apparatus is provided.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the technical means taken by the present invention are as follows. That is, in the invention described in claim 1, a plurality of outlets equipped with driving amount adjusting plates are formed at predetermined intervals on one side of the long side of the hopper body that is long in the lateral direction, In the cement-based fluid distribution device in which the chute is pivotably pivoted about the longitudinal axis, a worker's walking path is formed in the approximately half of the exit side above the opening of the hopper body, and the remaining approximately Covered with a net-like lid body in which a cement-based fluid supply port to the hopper body is formed at the center of the half, and is driven to rotate around the horizontal axis along the longitudinal direction of the hopper body inside the hopper body. A stirrer blade is provided , the stirrer blade is provided between a pair of side plates on the short side of the hopper body, a plurality of arms projecting from the shaft at predetermined intervals, and a support plate attached to the tip of the arm And a strip-like plate that is continuous with the support plate Consist of a plate, it is characterized in that is connected to a flexible hose to the distal end of each chute.
[0009]
According to the above configuration, even if the cement-based fluid is supplied to a part of the longitudinal direction of the hopper body that is long in the lateral direction, and the pile of the cement-based fluid is formed near the supply position, the longitudinal direction of the hopper body By rotating the stirring blade around the horizontal axis along the axis, the pile of cementitious fluid is mechanically and forcibly broken by the stirring blade, and quickly leveled over the entire interior of the hopper body. Thus, the time lag from the supply to the hopper body to the introduction to the chute can be substantially eliminated.
[0010]
[0011]
In addition, according to the above configuration, a worker's walking path is formed in the upper half of the opening of the hopper main body in the substantially half on the exit side, and the cement-based fluid supply to the hopper main body is provided in the central portion of the remaining half. Since the mouth is covered with a mesh-like lid body, the stirring state by the stirring blade can be confirmed visually from the walkway formed on the mesh-like lid body, and the operator falls to the hopper body accident Even if there is a pile of cementitious fluid near the cementitious fluid supply port formed in a part of the lid, as described above, The pile of cement-based fluid is mechanically and forcibly broken and diffused by the stirring blades, and is quickly leveled throughout the interior of the hopper body, which eliminates the time lag from the supply to the hopper body to the introduction of the chute. It can be completely eliminated
[0012]
In addition, the agitating blade is provided with a rotating shaft installed between both side plates on the short side of the hopper body, a plurality of arms projecting from the rotating shaft at predetermined intervals, a support plate attached to the tip of the arm, and a support since it is configured from a strip-shaped wing plate continuous to the bolted the axial direction to the plate, when the wing plate is damaged or worn, remove the bolt, Ru can be used to replace only the wing plate.
[0013]
Further, according to the above configuration, the flexible hose is connected to the tip of each chute, and the tip of the flexible hose can be directly inserted into the tremey tube. There is an advantage that the hopper can be omitted, thereby shortening the time required for the placing work. That is, the tremy tube is generally configured to be used by adding a plurality of tubes and attaching a receiving port hopper to the upper end. Then, a cement-based fluid is placed at the bottom of the groove filled with the hole wall stabilizing liquid, and the treme tube is sequentially pulled out as the cement-based fluid rises. It is common to replace the hopper for use with the lower tube and move on to the next placement work.
[0014]
In this regard, according to the configuration of the first aspect, since the tip of the flexible hose can be directly inserted into the tremey tube, the hopper body can be moved to the tremey tube without attaching a receiving hopper to the upper end of the tremy tube. It is possible to cast a cement-based fluid. Therefore, by omitting the receiving hopper at the upper end of the tremmy pipe, the labor for replacing the receiving hopper accompanying the withdrawal of the tremey pipe is omitted, and the time required for the placing work is shortened.
[0015]
In addition, the chute provided at each outlet of the hopper body can swing around the vertical axis and can swing to the left and right to some extent (usually about 10 degrees). The adjustment range of the installation interval of tremy tubes by swing is not so large. However, according to the above configuration, since the entire flexible hose connected to the tip of each chute has flexibility, it is supplied to the tremy tube of each chute in combination with the swinging of each chute itself. The possible range is greatly increased, and it is possible to flexibly cope with the change in the interval between the tremy tubes due to the difference in the installation interval of the steel frames.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
1 to 6 show an example of a cement-based fluid distribution apparatus A according to the present invention. In the figure, reference numeral 1 denotes a laterally long rectangular hopper main body fixed on the gantry 2 and having a bottom surface inclined so that one side of the long side is lowered. On one side of the long side of the hopper body 1 (inclined lower end side), there are a plurality of outlets 5 equipped with driving amount adjusting plates 4 that can be individually opened and closed and adjusted by the air cylinder 3. Formed at predetermined intervals, each outlet 5 is provided with a chute 6.
[0017]
Each chute 6 is pivotally attached via a free mechanism 7 having a vertical axis a and a horizontal axis b, and can swing about a certain angle (for example, about 10 degrees) around the vertical axis a. When the apparatus A is transported, each chute 6 is folded upward around the horizontal axis b so that the amount of lateral protrusion can be reduced. Reference numeral 8 denotes a flexible hose connected to the tip of each chute 6 so that the tip of the flexible hose 8 can be directly inserted into the tremy tube.
[0018]
Inside the hopper body 1, a stirring blade 9 that is rotationally driven in the direction of the arrow in FIGS. 2 and 5 is provided around the horizontal axis along the longitudinal direction of the hopper body 1 on the inclined lower end side. In this example, as shown in FIGS. 3 and 5 to 7, the agitating blade 9 includes a rotating shaft 9 a laid between both side plates on the short side of the hopper body 1, and the rotating shaft 9 a at predetermined intervals. A plurality of protruding arms 9b, a support plate 9c attached to the tip of the arm 9b by means of welding, bolting, or the like, and a belt-like blade plate 9d continuous in the axial direction bolted to the support plate 9c When the blade plate 9d is damaged or worn, the bolts can be removed and only the blade plate 9d can be replaced.
[0019]
Reference numeral 10 denotes a motor with a speed reducer provided below the hopper body 1, and 11 denotes an endless transmission body such as a chain and a belt for transmitting the motor output to one end portion of the rotating shaft 9 a protruding from the side plate of the hopper body 1. These constitute a rotational drive device for the stirring blade 9. Although not shown, the rotation driving device of the stirring blade 9 and the air cylinder 3 are operated in accordance with instructions from the operation panel so as to automatically control the rotation speed of the stirring blade 9 and the opening / closing and opening of the placement amount adjusting plate 4. It is configured.
[0020]
The upper part of the opening of the hopper body 1 is covered with a net-like lid body 12 made of expanded metal or the like. The cement-type fluid supply port 14 to the hopper main body 1 is formed at the central portion of the remaining half. Reference numeral 15 denotes a handrail of the walking path 13, and 16 denotes a raising / lowering trap to the walking path 13.
[0021]
The dimensions of the hopper body 1 are appropriately set corresponding to the length of the groove 17 of one construction unit. In the illustrated example, the long side of the hopper body 1 is set to 3300 mm and the short side is set to 200 mm. The number of chutes 6 is set corresponding to the number of tremy pipes 19 installed between the steel frames 18 that are built in advance in the groove 17 of one construction unit. In the illustrated example, the number of chutes 6 is eight. A chute 6 is provided.
[0022]
If the above-mentioned cement-based fluid distribution device A is used for the construction method of the SRC underground continuous wall, as shown in FIG. 1, when the concrete C is supplied to the hopper body 1 which is long in the lateral direction by the mixer truck B, the lid Even if the concrete C is supplied from the cement-based fluid supply port 14 formed in the body 12 to the hopper body 1 and the concrete fluid crest is formed in the vicinity of the cement-based fluid supply port 14, the hopper body 1 By rotating the stirring blade 9 provided inside, the pile of concrete C is mechanically and forcibly broken by the stirring blade 9 and is quickly leveled over the entire interior of the hopper body 1. In other words, the concrete C can be promptly and evenly poured into all the tremely pipes 19, and the time lag from the supply to the hopper body 1 to the introduction into the chute 6 can be substantially eliminated.
[0023]
In the illustrated example, the concrete C is supplied to the hopper body 1 by the mixer truck B. However, as shown in FIG. 8, the tube tip 20 a of the pumping pipe 20 led out from the pumping pump (not shown) is connected to the lid body 12. Even if it is inserted into the cement-based fluid supply port 14 and supplied to the hopper body 1 by a concrete pressure feeder, the same effects as described above can be obtained. In this case, the cylinder tip 20a of the pressure feeding pipe 20 inserted into the cement-based fluid supply port 14 may be one, but branching in two or three in plan view may reduce the supply amount to the hopper body 1. It is desirable in that it can be made uniform. Although not shown, in any case, it is also possible to use a vibrator that imparts vibration to the hopper body 1 and the stirring blade 9 together.
[0024]
Further, in the distribution device A described above, the upper part of the opening of the hopper body 1 is covered with a net-like lid body 12 partially formed with a cement-based fluid supply port 14, and the lid body 12 is covered with the walking path 13. Therefore, it is possible to visually check the stirring state by the stirring blade 9 from above the walking path 13, and to prevent the operator from falling to the hopper body 1 or dropping of tools or the like. . In addition, since the tip of the flexible hose 8 can be directly inserted into the tremmy pipe 19, the receiving hopper at the upper end of the tremy pipe, which has been conventionally required, can be omitted, thereby reducing the time required for the placing work. is there.
[0025]
The above-mentioned distribution device A classifies excavated soil by a treatment plant installed in the site, prepares a soil cement by mixing and mixing a predetermined amount of the classified excavated soil, cement, water and the like. Even if it uses about the construction method of the core material precedence type soil-cement underground continuous wall which is simultaneously cast in the groove | channel 17 by the treme tube 19 of this book, there exists the same effect.
[0026]
As the stirring blade 9, for example, as shown in FIG. 9, a plurality of blade plates 9d are provided at predetermined intervals in the longitudinal direction of the rotating shaft 9a, and the rotating shaft 9a rotates in one direction. In which the angle of each blade 9d is changed little by little so that a feed function can be obtained from the central portion (position in the vicinity of the cement-based fluid supply port 14) toward both sides in the axial direction. As shown in FIG. 10, it is possible to adopt a variety of shapes such as a plurality of blades 9d directly projecting on the rotating shaft 9a and shifted in phase by a predetermined angle (for example, 120 degrees) in a zigzag manner.
[0027]
【The invention's effect】
Since the present invention has the above-described configuration, there is an effect that a time lag from the supply to the hopper body to the introduction to the chute can be eliminated.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a cement-based fluid distribution apparatus according to the present invention.
FIG. 2 is a longitudinal side view.
FIG. 3 is a plan view.
FIG. 4 is a longitudinal front view of a main part.
FIG. 5 is a longitudinal side view of a main part.
FIG. 6 is a plan view of a main part.
FIG. 7 is a perspective view of a stirring blade.
FIG. 8 is a longitudinal side view showing another example.
FIG. 9 is a perspective view showing another example of a stirring blade.
FIG. 10 is a perspective view showing another example of a stirring blade.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS A ... Distribution apparatus of a cement-type fluid, 1 ... Hopper main body, 4 ... Placing amount adjusting plate, 5 ... Outlet, 6 ... Chute, 8 ... Flexible hose, 9 ... Stirring blade.

Claims (1)

A plurality of outlets equipped with driving amount adjustment plates are formed at predetermined intervals on one side of the long side of the hopper body that is long in the horizontal direction, and a chute can be swung around the vertical axis around each outlet. In the pivoted cement-based fluid distribution device, a worker's walking path is formed in the upper half of the hopper main body at the approximately half of the outlet side, and the cement system to the hopper main body is in the middle of the remaining half. covered with lid fluids supply ports are formed net, inside the hopper body, the stirring blades are rotated in the horizontal axis around along the longitudinal direction of the hopper body is provided, the stirring blade, the hopper Rotating shaft installed between both side plates on the short side of the main body, a plurality of arms protruding from the rotating shaft at predetermined intervals, a supporting plate attached to the tip of the arm, and an axis direction bolted to the supporting plate Each of the chutes. The dispensing device of cementitious fluids, characterized in that is connected to a flexible hose to the end.

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