JP2996380B2 - Method and apparatus for installing discharge facility buried in dam buried body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a dam discharge device and a device therefor, and more particularly to an RCD which has become very popular in recent years.
(Roller Compacted Dam) The present invention relates to a method for installing a discharge facility that is most suitable for the construction method.

[0002]

2. Description of the Related Art In recent years, RCD (Roller Compacted Da) has been used as a method of building dam bodies.
m) The construction method has been widely applied, and has greatly contributed to significantly shortening the construction period and saving costs. In this method, poorly mixed North Lamp ultra-hardened concrete with reduced cement content is transported by a dump truck, etc., the bottom-opening bucket is opened, and the concrete material is sprayed. Spread on a horizontal thin layer of 1 meter or less, compact with a vibrating roller such as a buyback or auxiliary vibrator, complete green cutting, curing, and clean the casting surface, and then apply the entire layer to the next layer. This is a method to build a dam by repeating the method and placing multiple layers of concrete. According to this method, the concrete compound can be transported by a dump truck compared to the conventional block method using cable clean, etc., and a wide-ranging thin layer is formed by making full use of mechanical force, and it is mechanically compacted Therefore, the entire surface becomes an even and strong casting surface, and a formwork for a seam forming a block is not required, so that a large dam is now widely used as a mainstream construction method.

On the other hand, to apply this RCD method locally, various problems that are different from the conventional ones emerge, and engineers in the industry repeatedly carry out experiments and developments with the aim of solving each problem, and have achieved results. As one theme, there is a problem of suspension of concrete casting during the period when the discharge facility is installed on the dam stake. In other words, in the method using slump concrete prior to the RCD method, a desired range is divided by a formwork and a concrete slurry is poured directly from a concrete mixer truck using a cable opener, a jib crane and a bottom-opening bucket into the space. Therefore, even though the construction of the discharge facility 3a in the middle of the dam was continued on the one hand, it was possible at the same time to simultaneously cast the concrete by pouring concrete.
In the D method, concrete is poured over the entire surface to the same level and the common height is extended over the entire surface by stacking thin layers. Therefore, the concrete is poured from the base of the dam to the level where the discharge facility 3a is installed. At the stage when the installation was advanced, once the casting was suspended, the equipment and members such as the vehicle for casting were once cleared, and then the installation of the discharge facilities was started. However, after the installation was completed, concrete casting had to be resumed, and the discharge facility had to be buried in the levee.

Japanese Patent Application Laid-Open No. Sho 63-289105 discloses FIG.
This is one of the prior arts proposed to solve this problem as shown in FIG. According to this proposal, after the levee concrete is entirely cast to a predetermined height (lower than the installation height of the discharge facility), the discharge facility support by the bar steel is used so that the desired installation height is obtained on the casting surface. Stand (frame) 1
No. 01 is installed, then the discharge facility 3a is installed on the mount, and concrete is cast under the support mount 101. That is. If the space between the gantry and the concrete placing surface is large enough, dump trucks, bulldozers, vibratory rollers, etc. can move in and out of this space and concrete placing can proceed without obstacles. On the other hand, the members of the discharge facility 3a, such as the discharge pipe 31a, the door stop 32a, and the rectifying pipe 33a, which are appropriately divided on the gantry by using the clay, can be suspended and assembled while being assembled. It says that the time to suspend the installation can be significantly reduced.

[0005]

In the prior art, theoretically, it can be accepted that both the casting of concrete by the RCD method and the assembling and installation of the discharge facility built in the middle of the dam are compatible. There is no denying that serious obstacles remain in applying this procedure to actual dam construction sites. That is, on the support gantry 101, when hanging the members of the discharge facility such as the discharge pipe which is a heavy material having a full lifting capacity such as truck clean, jib clean, etc., and performing the work of determining the position and assembling, the work is performed under the mount. It is, of course, extremely dangerous to have a dump truck loaded with concrete mix coming and going, spreading it with a bulldozer and driving the vibratory rollers to perform compaction, obviously, which is extremely dangerous. Should the wires come off, there would be no shortage of potential catastrophes for the casters working below. It is a fundamental principle of workplace safety that no personnel enter directly below a heavy object that is lifted and hollow, and it must not be overlooked that extremely high restrictions are imposed when both upper and lower operations are performed simultaneously. .

[0006] Even if a countermeasure that fully considers safety aspects is prepared, for example, even if a sturdy frame that sufficiently protects the worker's safety is prepared even if the steel structure block falls, it is assembled on the casting surface. The tall pedestal is to be buried in the concrete frame together with the concrete and finished its role, so even though it is a huge structure, it is a waste of resources and labor that is completely wasteful on the spot only after that. Forced to do so.

[0007] Also, at first, the space between the concrete casting surface and the base is sufficiently large to allow various driving equipment to pass therethrough, and the mechanical force is used to efficiently drive the base below the base. Even if we proceed, it is inevitable that the height of the space will gradually shrink as the driving progresses, and naturally the space will be narrowed and vehicles will not be able to pass.
At that time, concrete casting by the RCD method is no longer possible, so even if it is said that concrete casting is not hindered, it remains questionable whether it will have a large effect that will affect many people.

In order to solve the above-mentioned problems, the present invention is most suitable for an installation method of a discharge facility which is the safest and which can shorten the construction period as a whole, and a device therefor, particularly a dam construction constructed by an RCD method. The purpose is to provide a simple method and apparatus.

[0009]

According to the present invention, a method for installing a discharge facility buried in a dam levee according to the present invention is to work on a vacant lot adjacent to the levee at almost the same height as the installation height of the discharge facility. When the gantry 1 is temporarily constructed, the discharge facility 3 is assembled on the work gantry 1 via the moving device 2, and when the concrete placing to be performed at the same time is completed up to the installation surface P, the moving device 2 is operated. The above-mentioned problem has been solved by a procedure in which the discharge facility 3 is extruded horizontally, moved to the installation scheduled position, fixed, and then buried in the discharge facility by concrete casting which is performed again.

[0010] More specifically, the rail 2 is placed on the work gantry 1.
1 is laid, and the entire discharge facility 3 is assembled on the rail 21 via a sliding member. When the concrete placement that has been progressed at the same time is completed to the scheduled installation surface P, the rail 21 is extended to the scheduled installation position. After the sliding member on which the discharge facility 3 is mounted is slid on the rail to reach a predetermined position, it is buried at this position by concrete casting for re-construction, and the work gantry 1 is preferably removed. Is the way.

Not only this installation method, but also a block method in which slump concrete containing a large amount of water is poured using a conventional concrete form, or an expanded layer method in which two or more blocks are extended in the axial direction of the dam. Although it can be applied and can be expected to have a certain effect, if it is applied to the entire layer casting method using the high-efficiency RCD method developed in recent years, one serious obstacle faced by the method can be appropriately dealt with. This is the best embodiment to overcome.

The most suitable device used only in this method is a moving device 2 for pulling out the discharge facility 3 from the temporarily constructed work gantry 1 , a slide base 22 sliding on an H-shaped steel rail 21, and a rail. horizontal jack 23 which moves on the slide base each spillway 3 horizontally to the lateral direction, the horizontal jack 23 integral with combination consisting Ri by a clamping device 24 for clamping and the rail 21 engaged detachably most Are better.

[0013]

1 (A) and 1 (B) are front views of an embodiment of the present invention, and two working modes show a continuous operation of the present invention. In Fig. (A), on one side (left side of the figure), concrete is cast on the dam levee by the full-layer construction method, and on the other side (right side of the figure), work is constructed in a vacant lot adjacent to the planned levee position. This shows a state in which the work of assembling the discharge facility 3 on the gantry 1 via the moving device 2 is proceeding in parallel. Needless to say, both works proceed independently without interference from each other, so that there is no concern in terms of safety while maintaining the high efficiency of the RCD method. When the concrete placement is completed to the height of the installation surface P of the discharge facility of the dam corpse by the layer construction method, the moving device 2 is operated to move the discharge facility 3 on the work gantry 1 to the left as shown in FIG. Then, when it reaches the predetermined installation position, it is fixed.
The moved discharge facility 3 is buried by the restarted concrete placing work, and becomes a concrete skeleton having uniform strength over the entire surface to form a dam body. On the other hand, the main members of the moving device 2 are removed before embedding the concrete, and the work gantry 1 is also removed as appropriate and reused as a member in the next construction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. 1 (A) and 1 (B). However, this figure is merely an example, and the gist of the present invention is to construct a slab by concrete casting and assembling a discharge facility. It is important to emphasize that the construction is performed in parallel at the adjacent estate. On the other hand, Fig. (A) shows the construction of concrete on the whole dam layer by the RCD method. In this example, the dump truck 41 that has started from the concrete mixing facility arrives on the casting surface, and supplies the loaded poorly mixed north ramp concrete C. The concrete material is spread to a uniform thickness by a bulldozer, and is compacted by a buyback 42 or an auxiliary vibrator. There is a case where the supply of concrete uses a combination of a cable crane and a bottom-opening bucket as before, or other transporting equipment such as a transfer car, and other known equipment is applied to spreading, compaction. Needless to say.

On the other hand, on the right side of FIG. 1A, the work gantry 1 is assembled in a vacant lot in parallel, and the discharge facility 3 is being assembled on it. The work gantry 1 preferably has a structure that can be disassembled so that the steel beams forming the vertical and horizontal girders can be assembled to a desired height and area by fastening with bolts. One advantage is that it can be reassembled into a desired shape and reused as many times as it is needed every time construction is performed. Rail 2 made of H-beam on work gantry 1
1 is laid. The slide base 22 is placed on the rail 21, and the discharge facility 3 is assembled on the slide base 22 using the clenker 11. Since the overall shape of the discharge facility 3 tends to be enormous with the recent increase in size of the dam, the discharge facility 3 is divided into a transportable size at the factory and manufactured, and the discharge pipe 31 and the door are locally bolted and welded. The members constituting the contact 32 and the flow straightening pipe 33 are combined using the clenker 11 and the moving device 2
To complete the discharge facility 3 integrated with the above.

To illustrate the details of the moving device 2, a rail 21 made of H-shaped steel, a slide base 22, a horizontal jack 2
3. The combination by the clamp device 24 is desirable. FIG. 2 is a front view in which only one set is enlarged, and the slide base 22 horizontally moves so as to slide on the upper flange 25 of the H-shaped steel rail, so that the movement due to the rolling friction of a wheel such as a bogie is performed. However, there is no risk of runaway and it is safe. The slide base 22 has a built-in jack function,
Even if the height of each base surface of the discharge facility 3 is different, it is desirable to adjust the supporting height to equalize the load of each fulcrum, that is, the reaction force, and to perform stable movement. It is the horizontal jack 23 that engages with the side surface of the slide base 22 to drive the necessary side slip. In this drive, the electric hydraulic unit is incorporated so as to be electrically linked, and multiple slide bases start and stop simultaneously, so that the entire discharge facility that spans multiple slide bases is integrated. Moving, ensuring extremely stable operation.

The clamp device 24 is a member that functions to move the slide base in the lateral direction by receiving the reaction force of the horizontal jack, or to draw itself to the stopped slide base. The clamping device is provided with a function of holding and holding the upper flange of the H-shaped steel from both sides by a wedge jack having two wedge surfaces.

FIGS. 3A to 3D are schematic views showing the movement of the discharge facility 3 by the operation of the moving device 2. FIG. Figure (A)
5 shows a state at the time when the assembling of the discharge facility 3 is completed on the work gantry 1 erected in a vacant lot. At this time, the moving device supports the discharge facility 3 by a plurality of slide bases 22 mounted on the rails 21, the cylinder of the horizontal jack 23 is closed, and the piston rod is shrunk therein. The wedge of the clamp device 24 holds the upper flange 25 of the rail to suppress the movement.

FIG. 2B shows a state in which concrete casting (not shown) reaches a predetermined level, the rail extends to the installation surface of the discharge facility 3, and the discharge facility 3 is moved from the work gantry 1. At this time, the horizontal jacks start to operate at the same time while maintaining the bite of the clamp device with the rail, and the hydraulic unit 23 operates to operate the piston rod 2.
6 extends from the cylinder and presses the slide base 22 toward the left side of the figure, and the slide base slides sideways with the discharge facility 3 mounted thereon and moves as a whole.

When the piston stroke of the horizontal jack 23 is exhausted as shown in FIG. 2C, the clamping between the clamp device and the rail is released. When the horizontal jack is further actuated to retract the piston rod, the slide base 22 comes to rest on the rail due to friction, and the clamping device itself slides to the left by receiving the reaction force. Recover the same relative position. A preferred example of the lateral movement is presented here, but the rail is used as a normal rail to support a discharge facility assembled on one or more electric bogies, and the wheels of the bogie are rolled to traverse. It is also possible to use a method that does not particularly limit the form. In any case, when the movement of the target discharge facility to the predetermined position is completed, in the embodiment shown in the drawing, a horizontal jack or a clamp device is used, and in the case of a bogie type, an electric motor and its accompanying parts are driven. Needless to say, it is economical to remove the member and use it again.

[0021]

As described above, the present invention has presented the most rational and economical method for mounting the discharge facility buried in the dam breeding body. This method is safe and has the effect of minimizing the hindrance period of concrete placing due to the installation of the discharge facility, and also significantly shortening the total work. In addition, all the concrete bodies to be cast can be subjected to the entire layer construction method, and there is almost no local variation in the physical properties after molding.Therefore, the strength of the entire body is uniform and as a high-quality building Guarantees can also be given. Therefore, as long as the topographical conditions are satisfied, it should be regarded as providing a very advantageous construction method.

[Brief description of the drawings]

1A and 1B are front views showing two embodiments of the present invention according to the present invention.

FIG. 2 is an enlarged front view of a part (moving device 2) of the embodiment.

3A to 3D are schematic front views showing the operation of the moving device 2;

FIG. 4 is a front view (A) and a side view (B) showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Working gantry 2 Moving device 3 Discharge equipment 11 Clencar 21 Rail 22 Slide base (sliding member) 23 Horizontal jack 24 Clamping device 25 Upper flange 26 Piston rod 31 Discharge pipe 32 per unit 33 Rectifier pipe 41 Dump car 42 Buy back P Installation surface C North lamp concrete

Claims (4)

(57) [Claims] 1. A method for installing a discharge facility embedded in a dam buried body, comprising: temporarily constructing a work gantry 1 in a vacant lot adjacent to the levee outside the squatter and at a height substantially equal to the installation height of the discharge facility; When the discharge facility 3 is assembled on the work gantry 1 via the moving device 2 and simultaneously the concrete placing to be performed in parallel to the installation surface P is completed, the moving device 2 is operated to push out the discharge facility 3 horizontally. A method for installing a discharge facility to be buried in a dam levee, wherein the discharge facility 3 is buried by moving concrete to a scheduled installation position and re-installing the concrete. 2. The installation according to claim 1, wherein a rail 21 is laid on the work gantry 1 and the entire discharge facility 3 is assembled on the rail 21 via a sliding member. When the plane P is completed, the rail 21 is extended to the installation scheduled position, and the sliding member on which the discharge facility 3 is mounted is slid on the rail to reach a predetermined position. Buried in position,
A method for installing a discharge facility buried in a dam gantry, wherein the work gantry 1 is removed. 3. The installation method according to claim 1, wherein the concrete casting is a full-layer casting method such as an RCD method. 4. Installation of the discharge facility according to claim 1 to 3.
An apparatus used in the process with the mobile device 2 to draw the spillway 3 from the top of the work gantry constructed, the slide base 22 to slide over the rails 21 of the H-section steel, Sly
A dam comprising: a horizontal jack 23 for horizontally moving the discharge facility 3 mounted on a base 22 in a horizontal direction; and a clamp device 24 for engaging and disengaging the horizontal jack 23 and the rail 21. Installation equipment for discharge facilities buried in the levee.