JP2007152241A - Shielding water sheet joint in waste-on-surface-of-sea treating facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that it is difficult or impossible that connection of shielding sheet is performed in under water in conventional waste-on-the-surface-of-the-sea treating facilities. <P>SOLUTION: The shielding water joint of the waste-on-the-surface-of-the-sea treating facilities is provided with one side and the other side frame, and a hardly permeable material, the one side frame adheres to the end part of a shielding water sheet to be jointed and the other frame adheres to the end part of the shielding sheet for jointing. The one side of and the other side of the frames form a bag-shaped space to be filled with the hardly permeable material in the state of overlapping the shielding water sheet to be jointed with the shielding water sheet for jointing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water shielding sheet joint for a sea surface waste disposal site, and more particularly to a water shielding sheet joint for a sea surface waste disposal site to which a water shielding sheet can be connected in water.

As for the conventional water-impervious sheet joint, for example, as shown in Patent Document 1, two sheets are generally joined in the air by heat welding or by an adhesive.
JP 2001-310409 A

  Conventional joining of joint sheets by heat welding or adhesive is easy in the air, but joining in water is difficult or impossible. For this reason, when joining sheets, it is necessary to re-float what was once laid in water and float the end of the sheet on the water surface, and construction on slopes and slopes was particularly difficult.

  Moreover, when the sheet | seat has been laid from both right and left directions, it is necessary to lay what was adhered in the air underwater. When bonding in the air, expect the sheet body to stretch, and when it is laid in water after bonding, it is assumed that it will return to its original length, but in reality there is residual deformation of the sheet For this reason, there is a concern about adverse effects on the water shielding performance, such as dredging when laid in water.

  The present invention eliminates the above-mentioned drawbacks.

  The water-blocking sheet joint of the sea surface waste disposal site of the present invention is composed of one and the other formwork and a hardly water-permeable material, and the one formwork is bonded to the end of the jointed water-proof sheet. The other mold is bonded to the end of the joint water-impervious sheet, and the end of the joint water-impervious sheet is overlapped with the end of the joint water-impervious sheet. And the other forms a bag-like void to be filled with the hardly water-permeable material.

  One and the other of the molds are supported by a support material having a predetermined height.

  A block for preventing leakage of the hardly water-permeable material is provided on an end surface of the mold.

  The hardly water-permeable material is an asphalt mastic having deformation followability.

  The hardly water-permeable material is a soil-based material having deformation followability including any one of silicates and alkali metal salts, viscous soil, and clay mineral (bentonite).

  The hardly water-permeable material is a soil-based material having a deformation following property including viscous soil and clay mineral (bentonite).

  According to the present invention, the water-impervious sheet itself is not bonded in the air, and it is possible to seal the overlapped portion of the sheet in water, and compared with the conventional joint construction in the air, It is easy to suspend and resume, increasing the degree of freedom during construction.

  In addition, the sheet can be constructed in a state where the sheet is laid in water, and the sheet does not wrinkle along with the construction. Therefore, there is no fear of the sheet being damaged, and a reliable water shielding function is obtained.

  Further, the hardly water-permeable impermeable material follows the deformation without cracking even when the ground surface on which the seat is installed is deformed during an earthquake or the like.

  Embodiments of the present invention will be described below with reference to the drawings.

  As Example 1, a case where the present invention is applied to an outer revetment opening is shown.

  In the present invention, as shown in FIG. 1, for example, the lower surfaces of one and the other molds 6 a and 6 b made of a sheet material are respectively connected to the end portion 5 a of the joint water-proof sheet 5 and the end portion 7 a of the joint water-proof sheet 7. In addition, before laying these sheets 5 and 7 in water, they are attached in the air by heat welding or by an adhesive.

  (1) Opening shape

  In general, when constructing an outer revetment in a sea surface waste disposal site, an opening 2 is provided in a part of the outer revetment 1 as shown in FIG. 2 to enable navigation of the work vessel. At this time, the caisson 3, the lining stone 4, and the base material or the water shielding sheet 5 for the joint to be put on the lining stone 4 are temporarily suspended at both ends of the opening 2.

  When the opening 2 is closed, a caisson 3a is installed in the opening 2 as shown in FIG. 3, and a back stone 4a is installed as shown in FIG.

  (2) Construction of caisson and back stone

  (3) Laying of water shielding sheet for joints

  Before laying in water, the water-proof sheet 5 for a joint to which one mold 6a is attached to the end 5a by heat welding in the air or by an adhesive is installed on the back stone 4a as shown in FIG. After that, the joint impermeable sheet 7 in which the other mold 6b is attached to the end 7a by heat welding in the air or by an adhesive is laid on the underwater stone 4 as shown in FIG. In this case, as shown in FIG. 1, the end portion 5a of the water-blocking sheet for joint 5 and the end portion 7a of the water-blocking sheet for joint 7 are overlapped with each other, and between the one and the other molds 6a and 6b. A bag-like space 6 is formed.

  (4) Casting and filling of poorly permeable materials

  As shown in FIG. 6, a concrete block and a stone for preventing leakage of the hardly permeable material 8 filled in the bag-like void 6 are formed on the end surfaces of the one and the other bag-shaped molds 6a and 6b forming the void 6. A support 9 such as is installed. As the hardly water permeable material, for example, asphalt mastic or soil-based material having deformation followability is used. Further, a stone or metal support material 10 is installed on the outer side surfaces of the one and the other molds 6a and 6b so as to have a thickness of about 50 cm, for example, and a tremy tube 11 is used as shown in FIG. A poorly permeable material 8 is placed in the bag-like space 6 underwater. In order to prevent an excessive load from acting on the one and the other molds 6a, 6b when filling the hardly water-permeable material 8, the plurality of times are sequentially placed from the lower side, and the first-time hardly-permeable material 8 is filled. When the filling is completed, as shown in FIG. 8, the upper part of the one and the other molds 6 a and 6 b is closed with a string or a fastener at the upper part of the bag-like empty space 6, and the second and subsequent fillings of the hardly water-permeable material 8 In order to prevent damage to the upper closed portion 12, a counter material 13 made of stone or the like is installed on the closed portion 12 as shown in FIG. In some cases, before filling the poorly permeable material 8, the upper portions of the one and the other molds 6a and 6b are closed in advance to form a bag, and it is difficult to insert an injection pipe into the bag. There is also a method of placing a water-permeable material.

  The soil material includes, for example, any one of silicates and alkali metal salts, viscous soil, a material having deformation followability including all of clay mineral (bentonite) or viscous soil, and clay mineral (bentonite). It shall have deformation followability.

  Table 1 shows the characteristics of the current water-proof sheet.

  Among these, at present, the use of the present invention is assumed to be (1) easy to lay in water. (Specific gravity must be 1.0 or more)

  (2) Heat welding is possible. (Conventional heat welding is used when widening the raw material)

  (3) Be inexpensive

  For these reasons, there are two types, a vinyl chloride sheet (PVC) and a high density polyethylene sheet.

  Tables 2 and 3 show blending examples of asphalt mastic (sand mastic and gravel mastic) that are assumed as hardly water-permeable materials.

It is explanatory drawing of the water-impervious sheet joint of the sea surface waste disposal site of the present invention. It is a perspective view for explanation of a water-impervious sheet joint and caisson of the sea surface waste disposal site of the present invention. It is a perspective view for explanation of a water-impervious sheet joint and caisson of the sea surface waste disposal site of the present invention. It is a perspective view for explanation of a water-impervious sheet joint and caisson of the sea surface waste disposal site of the present invention. It is a perspective view for explanation of a water-impervious sheet joint and caisson of the sea surface waste disposal site of the present invention. It is a perspective view for explanation of a water-impervious sheet joint and caisson of the sea surface waste disposal site of the present invention. It is a perspective view for filling of the poorly water-permeable material to the water shielding sheet joint of the sea surface waste disposal site of the present invention. It is sectional drawing of the water-impervious sheet | seat joint of the sea surface waste disposal site of this invention. It is a perspective view for explanation of a water-impervious sheet joint and caisson of the sea surface waste disposal site of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Perimeter revetment 2 Opening part 3 Caisson 3a Caisson 4 Back lining stone 4a Back lining stone 5 Water-proof sheet for joint 5a End part 6 Bag-shaped space 6a One form 6b The other form 7 The joint-proof sheet 7a End 8 Non-permeable material 9 Support 10 Support 11 Tremy tube 12 Closed portion 13 Counter material

Claims (6)

  It consists of one and the other formwork and a hardly water-permeable material, and the one formwork is bonded to the end of the watertight sheet for joints, and the other formwork is the end of the watertight sheet for joints In the state where one end and the other of the mold are to be filled with the hardly water-permeable material in a state where the end portion of the water-blocking sheet for joints and the end portion of the water-blocking sheet for joints are overlapped with each other A water shielding sheet joint for a sea surface waste disposal site characterized by forming a void.   2. The water shielding sheet joint for a sea surface waste disposal site according to claim 1, wherein one and the other of the molds are supported by a support material having a predetermined height.   The water-blocking sheet joint for a sea surface waste disposal site according to claim 1 or 2, wherein a block for preventing leakage of the hardly water-permeable material is installed on an end surface of the formwork.   The water-impervious sheet joint for sea surface waste disposal site according to claim 1, 2 or 3, wherein the hardly water-permeable material is an asphalt mastic having a deformation following property.   The said poorly water-permeable material is a soil-based material having a deformation following property including any one of silicates and alkali metal salts, viscous soil, and clay mineral (bentonite). Sealing sheet joint for sea surface waste disposal site according to 2 or 3.   4. The sea surface waste disposal site according to claim 1, wherein the hardly water permeable material is a soil-based material having a deformation following property including viscous soil and clay mineral (bentonite). Water sheet fitting.

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