JPH0633601B2 - Concrete placing device using concrete vibrator in civil engineering work with depth - Google Patents

Description

TECHNICAL FIELD The present invention relates to a concrete placing method using a concrete vibrator and a device therefor in a civil engineering construction work having a depth.

(Prior Art) Conventionally, it was a general view that when placing this type of underwater concrete, there is no problem even without using a vibrator.

Recently, it has been considered as a main body structure, the bar arrangement has become denser, the number of simultaneously embedded objects has increased, and inevitably there has been a problem of surrounding concrete, and it has become an important issue to place it uniformly.

Further, as the pouring top of the underwater concrete comes closer to the top of the retaining end, the drop height decreases, the pushing force of the concrete decreases, the uniform wraparound becomes worse, and the quality is inferior.

Recently, it has been proved that it is better in terms of quality to use a vibrator together to solve the above problems.

However, in this case, it is a necessary condition that the vibrating part of the vibrator maintains an appropriate depth inside the concrete. If it is too shallow, the slime will be sprinkled in terms of quality and it will have the opposite effect. If it is too deep, the effect of the vibrator will be lost. As a condition for effectively using the vibrator, an internal force due to the flow of concrete in the lateral direction and the upward direction acts on the vibrator during concrete placing, so that it is caught on a part of the bar arrangement. For this reason, it is necessary to have a vibrator structure that does not hinder lifting.

(Problems to be Solved by the Invention) However, in the prior art, the state where concrete is left in place is not preferable because the placed concrete is not sufficiently compacted. In addition, when using a hand-held concrete vibrator, (1) not only does the hard part of the vibrator enter between the reinforcing bars of the rebar cage provided in the excavation hole and do not function sufficiently, but it often enters between the reinforcing bars and cannot be recovered. It was (2) Since the civil engineering work is done in a deep place, it is extremely difficult to manually operate when the length of the hose reaches several tens of meters, and it is necessary to hold or pull up such a concrete vibrator. Not only was it labor intensive, but it was a tough task. (3) In addition, it was difficult to confirm whether or not the concrete vibrator was operating reliably and functioning sufficiently for compaction when pouring in a deep area. (4) When placing underwater concrete, there were many drawbacks such as the position of the concrete was not visible and the concrete vibrator could not be moved to an appropriate position. It is an object of the present invention to solve these drawbacks, to save labor in concrete pouring work having a depth, and to make the quality of pouring concrete uniform.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a reinforcing bar cage installed in an excavation hole that stabilizes the hole wall with a stabilizing solution, and a place striking / underground continuous wall. In a device for placing underwater concrete in civil engineering and construction work having a uniform depth, a vibrating part, a vibration isolating part continuous to the vibrating part, a long hose part having a major mark on the outer surface and a built-in cable And a concrete vibrator with a hose that is extended, and is arranged on the ground surface,
The hose has a winding and rewinding means and an electric motor winding device having a rotation warning light, and means for guiding the running of the hose to hang it down the excavation hole, and displaying the amount of delivery of the hose. A guide roller device provided with means, and a measuring device for measuring the depth of the concrete top end surface, which is measured by hanging a measure provided with a weight at the tip from the ground into the excavation hole and engaging the concrete top end surface. ,
A concrete vibrator for civil engineering and construction work having a depth characterized in that the vibrating portion of the concrete vibrator is configured to hold the vibrating portion of the concrete vibrator at a predetermined drooping depth in concrete. A concrete pouring device using the above was constructed.

(Operation) Since the present invention is configured as described above, since the concrete vibrator and the winding device are combined and integrated, there is no scattering of the hose portion, and the winding device is driven by the electric motor, which requires an operator. Since it is possible to do various driving at hand, the work is labor-saving. In addition, since the winding device is equipped with a rotation warning light and the guide roller device is equipped with hose feed amount display means, the concrete vibrator can be hung securely, and a means for measuring the depth to the concrete top surface by a separately provided hanging weight is provided. On the other hand, since the concrete can be poured accurately, the quality of the poured concrete can be made uniform.

Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration explanatory view of one embodiment of the present invention. In FIG. 1, 1 is an excavation hole, 2 is a hole wall, and 3 is a reinforcing cage. The hole wall 2 of the excavation hole 1 is stabilized with a stabilizing liquid such as bentonite. 1 in the figure due to the construction work of the rebar cage in the excavation hole 1
A reinforcing bar car 3 shown by a chain line is provided. A tremie pipe 11 for pouring concrete is provided in the excavation hole 1. 4 is a winding device, 4-1 is a vibrator input code, 4-2 is a winding device input code, 4-3 is an operation pendant switch, 4-4 is a rotation warning light, and 4-5 is a distribution box. Although not shown, the winding device 4 is connected to an electric motor. 5 is a concrete vibrator device, 5-1 is a vibration part, 5-2 is a vibration isolation part, and 5-3 is a hose part. The concrete vibrator device 5 includes a vibrating section 5-1, a vibration isolating section 5-2 continuous with the vibrating section 5-1, and a long hose section 5-3. Anti-vibration unit
5-2 is located between the vibrating section 5-1 and the hose section 5-3, and
It has a function of interrupting the vibration of -1 so as not to be transmitted to the hose portion 5-3, and gives a uniform quality of the poured concrete. 6 is a guide roller device, 6-1
Is a hose feed amount display means. Guide roller device 6
Is provided near the edge of the excavation hole 1 and guides the running of the long hose portion 5-3 from the winding device 4 and hangs down into the excavation hole 1.
The guide roller device 6 is provided with a hose feed amount display means 6-1 and displays the length of the hanging hose portion 5-3. As the hose feed amount display means 6-1, for example, a mechanical rotary counter or a photoelectric reading device is used. In the concrete vibrator device 5 suspended in the excavation hole 1, the vibrating part 5-1 is embedded in the top end surface 7 of the concrete 10. The depth of the concrete top surface is measured by a measure 9 having a weight 8 separately. Since the top end surface 7 moves as the concrete 10 is placed, the position of the vibrating part 5-1 also operates the winding device 4 by operating the operation pendant switch 4-3 to wind the hose part 5-3. To be moved. The hose portion 5-3 is appropriately marked with a measurement mark 5-4 so that the moving distance can be confirmed, and the hose feed display amount display means 6-1 of the guide roller device 6 can also be used to confirm the vibration portion 5-1.
You can check the drooping position of. Since the position of the concrete vibrating device 5 in the excavation hole 1 having such a depth can be operated by the operation pendant switch by the operation of the winding device 4 installed on the ground surface GL, a plurality of these devices can be operated by a single person. It is also possible to drive.

(Effects of the Invention) Since the present invention is configured as described above, in placing concrete such as a continuous underground wall having a depth, the position of the vibrating part of the concrete vibrator is accurately arranged according to the movement of the concrete top end face, There is an outstanding effect that the quality of the concrete can be made uniform and the labor-saving work can be performed by operating the pendant switch for operating the winding device.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of one embodiment of the present invention. 1 ... Drilling hole, 2 ... Hole wall, 3 ... Reinforcing cage, 4 ... Winding device, 4-4 ... Rotating warning light, 5 ... Concrete vibrator device, 5-1 ... Vibration part, 5 -2 …… Vibration isolator, 5-3…
… Hose part, 5-4… Measure mark, 6… Guide roller device, 6-1… Hose feed amount display means, 7… Concrete top face, 8… Weight, 9… Measure, 10
…… Concrete, 11 …… Tremy tube, 12 …… Stabilizer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoji Sekigawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Masato Tanaka 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd. (72) Inventor Eiji Miyano 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) Reference JP-A-52-30020 (JP, A) JP 57-172039 (JP, A) Actual development Sho 56-12826 (JP, U) JP-B 55-44331 (JP, B2)

Claims (1)

[Claims] 1. An apparatus for placing underwater concrete in civil engineering and construction work, which has a depth of a cast-in shaft, a continuous underground wall, etc., by installing a rebar cage in an excavation hole that stabilizes the hole wall with a stabilizing liquid. The vibration part, the vibration-proof part that is continuous with the vibration part, the concrete vibrator with a hose that extends the long hose part that has a measure mark on the outer surface and has a built-in cable and is installed on the ground surface. The hose is provided with a winding device for winding and rewinding the hose and a winding device using an electric motor having a rotation warning light, and means for guiding the running of the hose to hang it down the excavation hole. A guide roller device provided with a delivery amount display means, and a measuring device for measuring the depth of the concrete crown surface for measuring by hanging a measure provided with a weight at the tip from the ground into a drilling hole and engaging with the concrete crown surface. And the depth of the top surface of the concrete is measured, and the vibrating portion of the concrete vibrator constitutes a holding means for holding at a predetermined drooping depth in the concrete. Concrete pouring equipment using concrete vibrator in construction work