JP3617026B2 - Water bottom casting device for fluidized solidified material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluidized solidification treatment material in which a flowable solidification treatment material such as a solidification treatment mud mixed with cement or other solidifying agent is mixed with underwater concrete or earth and sand using a falling cylinder such as a tremy tube. The present invention relates to a water bottom casting apparatus.
[0002]
[Prior art]
In general, tremy pipes are used in the construction of cast-in-place concrete structures at the bottom of the water. In this conventional pouring of the concrete with the tremy pipe, the concrete to be dropped one after another is placed by sequentially placing the concrete while the tip of the tremy pipe is kept immersed in the first dropped concrete. The concrete structure of a certain quality can be obtained.
[0003]
However, management of the tube tip of the tremy tube is performed by visual observation by a diver, and since it is not possible to place concrete in an optimal state at all times, additives such as a thickener are mixed and water is added from the lower end of the tremy tube. Even if the concrete that is being placed by backflow may be washed a little, the composition is such that the quality of the concrete does not deteriorate.
[0004]
[Problems to be solved by the invention]
In the conventional method as described above, an additive such as a thickening agent is required, so that there is a problem that the material cost of the concrete becomes high.
[0005]
Also, in recent years, for the purpose of processing dredged sand caused by dredging to maintain the channel at the port and improving the ground of the seabed, cement-based solidifying agent is mixed into the dredged sand and returned to the seabed, so that it has a certain level of strength. A method of forming a solidified ground is being developed.
[0006]
When placing a muddy solidified material mixed with concrete-based solidifying agent in such dredged soil on the sea floor, the water content is higher than that of ordinary concrete, and the addition ratio of the solidifying agent is also small. Therefore, if washed with water during casting, the quality will be greatly reduced, and mud and solidifying agents may diffuse into the water and contaminate the water area. It is necessary to let
[0007]
In view of such conventional problems, the present invention allows the fluidized solidified material placed on the bottom of the water to be raised to the bottom of the water without being washed with water, and also prevents mud from spreading during the placement. The present invention was made for the purpose of providing a water bottom casting device for fluidized solidified material.
[Means for Solving the Problems]
The feature of the present invention for solving the conventional problems as described above and achieving the intended purpose is that the lower end of the solidification treatment material falling cylinder that causes the fluidized solidification treatment material to which cement or other solidifying agent is added to flow down to the bottom of the water. to be molded into a circular or polygonal shape, a sheet-like surface covering material covering the surface of the flowable solidification material is Da設the sea bed fixed from fluid under tube lower end, to the surface coating material is water injection in internal A plurality of water injection bags that are expanded into a predetermined shape and exhibit shape retention properties are arranged in a radial arrangement from the center portion to the peripheral portion of the surface covering material, and water is injected into the water injection bag to thereby form the surface. It exists in the water-bottom casting apparatus of the fluidity | solidification processing material which made the coating | cover material expand in the predetermined umbrella shape .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0010]
In the figure, reference numeral 1 denotes a solidified material falling cylinder made of a tremy tube, which is suspended from the work ship 2 to the bottom of the water, and is solidified from a hopper at the upper end such as a material obtained by adding a cement-based solidifying agent to dredged soil or concrete. A treatment material is introduced and allowed to flow down to the bottom of the water through the downflow cylinder 1.
[0011]
Moreover, the flow-down cylinder 1 can adjust the height up and down so that the lower end may keep the position slightly lower than the surface of the processing material A which has been first placed on the bottom of the water and raised.
[0012]
A central portion of a surface covering material 3 having a polygonal shape made of a flexible material such as a cloth or a rubber material is fixed to the outer periphery of the lower end portion of the falling cylinder 1.
[0013]
On the upper surface of the surface covering material 3, water injection bags 4, 4..., Which are arranged in a radial pattern around the position of the falling cylinder 1, are directed toward the respective apexes of the polygon, and the water injection bags 4, 4. ... Is fixed to the upper surface of the flange 1 a protruding from the outer periphery of the lower end of the flow-down cylinder 1 through the surface covering material 3 so that the end 4 a on one side (base end side) of the. ing. This water injection bag 4 is constituted by a material mainly composed of a water-impermeable cloth material, rubber, synthetic rubber or the like and water-impervious flexible material, and can be poured and drained inside, and can be folded in a state where water is not poured. By pouring water, it expands into a predetermined shape and has a shape retaining property. And when the surface covering material 3 is in a state where water is not poured into the water injection bag 4, it is in a state that can be freely deformed together with the water injection bag 4, and when the water is injected into the water injection bag 4 and the bag is inflated, It has been expanded into an umbrella shape.
[0014]
When using the placing device configured as described above, as shown in FIG. 3, the water covering bag 4 is not poured, but the surface covering material 3 is folded and fixed around the falling tube 1. Hang down toward the bottom of the water. As a result, the water can be suspended to a predetermined height with little resistance. Then, as shown in FIG. 4, when water is poured into the water injection bag 4 after drooping near the bottom surface 5, the end 4 a on one side (base end side) of each of the water injection bags 4, 4. Since it is supported on the upper surface of the protruding flange 1a, each of the water injection bags 4, 4... Extends outward in the radial direction around the falling tube 1, thereby expanding the surface covering material 3 into a predetermined umbrella shape. In this state, it is lowered to the desired initial fluidized solidified material casting height. Thereafter, as shown in FIG. 5, the water is poured out from the water injection bag 4, and the periphery of the surface covering material 3 is brought into contact with the water bottom. In this state, as shown in FIG. 6, the fluidized solidified material A is caused to flow down through the flow-down cylinder 1 and gradually raised according to the flow-down amount.
[0015]
The fluidized solidified material A placed on the bottom of the water in this way is placed in the surface covering material 3 that expands in an umbrella shape and rises to the bottom of the water successively, so that its surface is the lower surface of the surface covering material 3. It will be in the state covered by contact with.
[0016]
Moreover, since the water injection bag 4 is installed radially, when the falling tube 1 is raised during the setting of the solidified material, the umbrella operates in a squeezed state and follows the rise of the solidified material A. And expanded horizontally.
[0017]
In addition, in the above-mentioned embodiment, although the surface covering material 3 is made into polygonal shape, circular may be sufficient.
[0018]
【The invention's effect】
As described above, the water bottom casting apparatus according to the present invention is formed into a circular or polygonal shape at the lower end of the solidification treatment material flow cylinder that causes the flowable solidification treatment material to which cement or other solidifying agent is added to flow to the bottom of the water , A sheet-like surface covering material that covers the surface of the fluidized solidified material placed from the lower end of the falling cylinder to the bottom of the water is fixed, and the surface covering material is inflated into a predetermined shape by pouring water into the interior, thereby retaining the shape. A plurality of water injection bags exhibiting the property are installed in a radial arrangement from the center portion to the peripheral portion of the surface covering material, and the surface covering material is expanded in a predetermined umbrella shape by pouring water into the water injection bag. By doing so, the surface of the portion of the fluidized solidified material with the largest movement immediately after placement is swelled while being covered with the surface coating material and flows in the horizontal direction. Without water The prevention diffusion, viscosity without additive, such as dispensing, yet safely underwater hitting set even solidification material of high fluidity state.
[0019]
In addition, when the surface covering material is folded, the drooping operation of the falling tube can be performed in a state where resistance to water is small, and furthermore, at the bottom of the water, it can be easily expanded into a predetermined shape by pouring water into the water pouring bag. .
[0020]
Furthermore, folding in a state where no water is poured is facilitated, and, however, it is opened and closed following the relative height with the surface of the solidified material placed on the bottom of the water, and a good surface covering state is obtained.
[Brief description of the drawings]
FIG. 1 is a partially longitudinal side view showing an example of an apparatus according to the present invention.
FIG. 2 is a plan view of the same surface covering material portion.
FIG. 3 is a sectional view showing a settling state of the device of the present invention.
FIG. 4 is a cross-sectional view showing an expanded state of the above.
FIG. 5 is a cross-sectional view showing a state immediately before placing the fluidized solidified material.
FIG. 6 is a cross-sectional view showing a fluidized solidified material placement state according to the above.
[Explanation of symbols]
A Flowable solidification treatment material 1 Solidification treatment material falling cylinder 2 Work boat 3 Surface coating material 4 Water injection bag

Claims (1)

A fluidized solidification treatment formed into a circular shape or a polygonal shape at the lower end of a solidified treatment material flowing down to the bottom of a fluidized solidified treatment material to which cement or other solidifying agent has been added. A sheet-like surface covering material that covers the surface of the material is fixed, and a plurality of water injection bags that are expanded into a predetermined shape by injecting water into the surface covering material and exhibit shape retention are provided on the surface covering material. The fluidized solidification treatment material is characterized in that the surface covering material is spread in a predetermined umbrella shape by being placed in a radial arrangement from the central portion to the peripheral portion and pouring water into the water pouring bag. Water bottom casting device.

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