JP2689355B2 - Underwater pouring device and underwater pouring method for solidified material - Google Patents

Description

TECHNICAL FIELD The present invention relates to an underwater pouring apparatus and method for pouring a solidified material such as concrete or mortar into water or the sea. is there.

[Conventional technology]

Conventionally, when concrete or soil cement is poured into the water of the sea or river for landfilling, the target water area is surrounded by steel sheet piles or sheets to prevent contamination of water, and concrete etc. The method of placing the solidified material is adopted. Further, a method has been proposed in which a special thickener is added to the solidified material to be placed to increase the separation resistance, and the material is directly placed in water.

[Problems to be solved by the invention]

However, in the underwater casting method of the solidified material in which the casting area is surrounded by steel sheet piles, although the diffusion of sewage is limited, a large amount of water is polluted, and the treatment requires a large amount of money. Not only that, but there was a drawback that the steel sheet pile deadline would hinder the navigation of the ship.

Also, in the method of arranging the seat in the depth direction and surrounding the construction water area, since the work of stretching the seat is performed underwater, it is difficult to perform detailed work, and it is a small scale work under extremely limited conditions. I had no choice but to. Especially in the case of water flow, adaptation was more difficult and the effect could not be expected so much.

Further, the method using a special thickener does not require large-scale construction equipment, but it is uneconomical because the special thickener is expensive.

Furthermore, in all the conventional methods, since the water (seawater) and the solidified material are in direct contact with each other, the solidified material is separated due to the flow, and the quality of the solidified material is deteriorated.

The present invention has been made by paying attention to the conventional problems as described above, while minimizing the occurrence of pollution of seawater or lake water, preventing the separation of the solidified material, an expensive special thickener An object of the present invention is to provide an underwater pouring device for a solidified material and a method for underwater pouring, in which a solidified material can be economically placed by a simple device without using it.

[Means for solving the problem]

The present invention has been made in view of the above-mentioned object, and its gist is to wrap a rubber membrane or the like installed so as to cover the construction area of the water bottom, and to connect one end to the wrapping member, Concrete from the other end to the water bottom in the construction area,
A tremie pipe for casting a solidified material such as mortar, a water recovery pipe having one end connected to the encapsulation member, and a water recovery pipe connected to the water recovery pipe to recover water in a construction region covered by the encapsulation member The submersible casting device for the solidified material is composed of a water recovery pump and a water recovery pump.

Further, another gist of the present invention is to install the encapsulating member so as to cover the construction area of the water bottom, and to collect the water inside the tremie pipe for placing the solidified material and the encapsulating member. A recovery pipe is connected to the encapsulation member, and a solidifying material such as concrete or mortar is placed in the construction area through the tremie pipe, and water in the construction area covered by the encapsulation member is collected. The method of casting a solidified material in water is characterized in that

Still another gist of the present invention is to install a wrapping member so as to cover a construction area of a water bottom, and to use a tremie pipe for casting the solidified material and a water recovery pipe for collecting water inside the wrapping member. And to connect to the encapsulation member, after collecting the water in the construction area surrounded by the encapsulation member in advance, to cast a solidifying material such as concrete and mortar into the construction area through the tremie pipe And a method of placing a solidified material in water.

[Action]

The encapsulating member in the present invention covers the region of the water bottom where the solidified material is cast, thereby closely adhering to the solidified material that is cast through the tremie tube, and the solidified material causes water to come into contact with the solidified material. Perform the placing work while preventing pollution and material separation.

On the other hand, the water recovery pipe acts to enhance the adhesion between the encapsulation member and the solidified material by collecting water between the encapsulation member and the water bottom (or the solidified material).

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a plant ship floating on the surface of water such as the sea, on which, for example, a concrete mixer (not shown) is mounted. Reference numeral 2 is a rubber membrane as an encapsulating member installed so as to cover the construction area of the water bottom (sea bottom, etc.), and a weight 3'or an anchor 3 is attached to the upper part of the rubber membrane so that it is along the water bottom as much as possible. is there. Reference numeral 4 denotes a tremie tube having one end penetrating the rubber membrane 2, and the penetrating joints are hermetically bonded to each other by a sealing material, but in some cases, they may have mutually movable structures. The upper end of the tremie pipe 4 is connected to a concrete pump (not shown) of the plant ship 1 or opens above the water surface, and a hopper or the like is attached to the upper end as necessary. Further, concrete from the concrete mixer is put into this hopper, and this is poured through the tremie pipe 4 onto the water bottom in the construction area. Reference numeral 5 denotes a water recovery pipe whose one end is connected to the rubber membrane 2, which collects water accumulated in the rubber membrane 2 on the water surface by a water recovery pump 13. In other words, the inside of the water recovery pipe 5 is pulled to the negative pressure side by the water recovery pump 13 during the pouring of concrete or the like, so that excess water is prevented from existing in the rubber membrane 2 as much as possible. . Also,
The upper end of the water recovery pipe 5 is branched into two, one of which faces the surface of the water, and the other of which is led out to the polluted water recovery / treatment section. Further, valves 6 and 7 are attached to the two branched ends of the water recovery pipe 5, and a valve 8 is attached to the lower end. Further, 9 is a floating body which is floated on the water surface and supports the water recovery pipe 5 so as not to fall. Further, 12 is a turbidity sensor installed in the water recovery pipe 5.

Next, a method of pouring concrete into the construction area underwater will be described in the order of steps.

First of all, a plant ship equipped with a concrete mixer,
The rubber membrane 2 is put into the water in this construction area by sailing to the construction area where the concrete is placed, which is the construction site.
And spread it on the bottom 10 by underwater work. At this time, the central part is inflated so as to form a predetermined space 11 in consideration of the amount of concrete placed in the rubber membrane 2, and the peripheral part is extended along the surface of the water bottom 10 by using the anchor 3, and Prevent distribution to the inside and outside. At this time, air should not enter the space 11 as much as possible.

Next, the lower end of the tremie pipe 4 unloaded from the plant ship is watertightly connected to the rubber membrane 2 and circulates in the space 11, the upper end of which opens above the water surface so that the above hopper (not shown) can be attached. To Further, a water recovery pipe 5 supported by a floating body 9 is installed on the water surface, and the lower end of the water recovery pipe 5 is watertightly coupled to the rubber membrane 2 to communicate with the space 11, and the upper end thereof is above the water surface. In two, one is exposed on the surface of the water as it is, and the other is communicated with the polluted water recovery processing unit (not shown) side.

Further, the valve 7 and the valve 8 in the water recovery pipe 5 are closed and the valves 6 and 8 are opened to inject concrete (or soil cement or the like) from the mixer on the plant ship 1 into the tremie pipe 4 through the hopper. Therefore, concrete is sequentially poured from the tremie pipe 4 to the bottom of the water in the rubber membrane 2 in a thick manner.

Then, the water in the space 11 covered with the rubber membrane 2 by such casting rises in the water recovery pipe 5.
This rise is naturally caused by the rise in the water pressure in the space 11, but the use of the water recovery pump 13 makes it quick and reliable. In this case, the turbidity sensor 12 in the water recovery pipe 5
When the turbidity of the rising water is detected and the water is not polluted, the water is discharged through the open valve 6 so as to be returned to the surface of the sea. On the other hand, when the turbidity sensor 12 detects the contamination of water, the valve 6 is closed and the valve 7 is opened. For this reason,
The polluted water is sent to the polluted water recovery processing means for purification treatment,
It will be released into the sea again. When the concrete pouring work is completed in this way, the valve 8 is closed, and after the concrete is hardened, the water recovery pipe 5 and the tremie pipe 4
Will be collected together with the rubber membrane 2 and will be relocated to the next construction area for use in concrete pouring work.

Next, another embodiment of the method for pouring a solidified material in water according to the present invention will be described.

First, as in the case of the above-described embodiment, a plant ship equipped with a concrete mixer is made to sail to the construction area of the concrete placing, which is the construction site, and waits, and the rubber membrane 2 is dropped into the water in this construction area. , This is spread on the water bottom 10 by underwater work. At this time, the weights 3 ′ are appropriately scattered on the surface of the rubber membrane 2,
The rubber membrane 2 is arranged along the surface of the water bottom 10 to prevent the water from flowing into the space 11. At this time, the space 11 is made as small as possible. The periphery of the rubber membrane 2 is fixed with anchors 3 and weights 3 '.

Next, the lower end of the tremie pipe 4 unloaded from the plant ship is watertightly connected to the rubber membrane 2 and communicates with the space 11, the upper end of which opens above the water surface so that the above hopper (not shown) can be attached. To Further, a water recovery pipe 5 is arranged in parallel in the tremie pipe 4, and the lower end of the water recovery pipe 5 is radially branched into three at an interval of 120 °, and each is water-tightly coupled to the rubber membrane 2. ing. This upper end is connected to the water recovery pump 13 on the water surface and then branched, one of which faces the water surface as it is and the other communicates with the polluted water recovery processing unit (not shown) side.

Here, the water in the space 11 covered with the rubber membrane 2 is previously recovered by the water recovery pump 13. As a result, the water in the space 11 covered with the rubber membrane 2 can be minimized, and the material separation that occurs when the solidified material is poured into the water can be reduced. In this case, although a small amount of water remains in the rubber membrane 2, if water is collected by the water recovery pump 13 even when the solidified material is placed, which will be described later, most of the water is recovered at this point. it can. Further, the detection of the remaining water can be judged by the turbidity sensor 12 or by the load current of the water recovery pump 13 as in the above-mentioned embodiment.

Further, the solidified material is injected from the mixer on the plant ship 1 into the tremie pipe 4 via the hopper. At this time, the solidified material is sequentially cast from the tremie pipe 4 to the bottom of the water in the rubber membrane 2, but since the water in this is collected, the rubber membrane 2 adheres to the solidified material and solidifies. It is pushed up according to the casting height of the material.

In this way, when the work of placing concrete is completed, the valve 8 is closed, and after the concrete is hardened, the water recovery pipe 5 and the tremie pipe 4 are recovered. Also,
Recovery of the rubber membrane 2 is performed as appropriate.

Although the rubber membrane 2 is used as the encapsulating member in each of the above-described embodiments, the present invention is not limited to this, and a plastic sheet or cloth may be used. Further, in the above embodiment, the valve
The case where the switching of 6, 7 and 8 is performed by the detection data of the turbidity sensor 12 is shown, but there is no problem even if some of them are switched manually.

〔The invention's effect〕

As described above, according to the present invention, the construction area of the water bottom is covered with the encapsulation member, and the solidified material is driven into the construction area covered with the encapsulation member by the tremie pipe, and the water recovery pipe and the water are collected. Since the inside of the contaminated water covered with the encapsulating member is collected by the collection pump, it is possible to prevent the generation of pollution in the water area around the construction area.

In addition, since the solidified material placed inside the encapsulation member is not affected by water flow, etc., it is possible to cast a solidified material of good quality into water without the need for an expensive special thickener as in the past. It is possible and the material cost is reduced.

Furthermore, since it is a relatively simple device such as the encapsulation member, the tremie pipe, the water recovery pump, and the water recovery pipe, it is economically superior, and there is no need to cut off with steel sheet pile as in the past, so it is possible to use It is effective in that it is less likely to interfere with navigation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an underwater casting apparatus and method for casting a solidified material according to the present invention, and FIG. 2 is a block diagram showing another embodiment of the present invention. 1 ... Plant ship, 2 ... Encapsulation member, 3 ... Anchor,
3 '... Weight, 4 ... Tremy tube, 5 ... Water recovery pipe, 6,7,8 ... Valve, 9 ... Floating body, 10 ... Water bottom.

Claims (5)

(57) [Claims] 1. An encapsulating member which is installed so as to cover a construction area of a water bottom, and one end is connected to the encapsulation member, and a solidified material such as concrete or mortar is cast from the other end to the water bottom in the construction area. A tremie pipe to be installed, a water recovery pipe having one end connected to the encapsulation member, and a water recovery pump connected to the water recovery pipe for recovering water in a construction region covered with the encapsulation member. An underwater casting device for a solidified material, comprising: 2. A valve for switching the delivery direction of the water depending on whether or not the recovered water is polluted water is provided on the drain side of the water recovery pump in the water recovery pipe. Item 1. A submerged casting device for a solidified material according to item 1. 3. A weight or an anchor is provided around the encapsulating member so as to extend along the water bottom, and the upper end of the water recovery pipe is supported by a floating body. Item 1. A submerged casting device for a solidified material according to item 1. 4. An encapsulation member is installed so as to cover the construction area of the bottom of the water, and a tremie pipe for casting the solidified material and a water recovery pipe for recovering water inside the encapsulation member. It is characterized in that it is connected to a packaging member, and further solidified material such as concrete and mortar is placed in the construction region through the tremie pipe, and water in the construction region surrounded by the encapsulation member is recovered. Underwater casting method of solidified material. 5. An encapsulation member is installed so as to cover a construction area of a water bottom, and a tremie pipe for casting the solidified material and a water recovery pipe for recovering water in the encapsulation member are covered with the encapsulation member. It is characterized in that the solidified material such as concrete and mortar is cast into the construction area through the tremie pipe after collecting water in the construction area surrounded by the encapsulation member in advance and connected to the packaging member. Underwater casting method of solidified material.