JP2006193966A - Construction method and joint structure for joint part of impervious material enabling check of cut-off property - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method and a structure for a joint part with imperviousness to water, which enable a cut-off material to exert predetermined performance, by surely preventing the intrusion of sediment into the joint part in the driving of an impervious panel, and which enable the cut-off performance of the joint part to be easily and rapidly checked. <P>SOLUTION: The first impervious panel 102 is driven into the ground 108 in a state wherein a packer 105 for preventing the intrusion of the sediment is preinserted into a female joint part 102b. After the impervious panel 102 is driven, the packer 105 is pulled out from inside the female joint part 102b while slurry is injected. A male joint part 102c of the second impervious panel 102 is inserted into the female joint part 102b, and the cut-off material 111 is attached to both an inner peripheral surface of the female joint part 102b and an outer peripheral surface of the male joint part 102c in a sandwiched manner, so that the cut-off property of the joint part 106 can be ensured. Slurry is stored in a cavity 107 between an inner peripheral surface 102e of the male joint part 102c and the inner peripheral surface 102f of the female joint part 102b, and the monitoring of a water level is performed, so that the cut-off performance of the cut-off material 111 can be checked. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for constructing a joint portion having water-impervious properties at the time of connection of a water shielding material and a joint structure.

  Steel pipe sheet piles, water shielding panels, etc. are often used as a water shielding material for preventing the leakage of contaminated water at a waste disposal site and constructing harbor facilities. In particular, when used in a water-proof revetment structure at a waste disposal site, prevent leaching of contaminated water from the disposal site to the outside through joints of water-shielding materials such as steel pipe sheet piles and water-proof panels. is required.

  The joint portion of the water shielding material is filled with a water stop material such as mortar and asphalt mixture, and the water stop material prevents the contaminated water from leaching out of the field through the joint portion. In order to improve the water-stopping performance of this water-stopping material, before filling the water-stopping material, the earth and sand that has entered the joint when the water-blocking material is placed is removed by a water jet, air lift, or other removal method, and washed. It is common to do.

  However, since the joint portion has a small diameter, there is a problem that the workability of removing and cleaning the earth and sand is poor and time is required. Further, when the depth of the water shielding material is increased, the efficiency of water jet, air lift and the like is lowered, so that it is difficult to remove earth and sand, which requires a lot of time.

  Therefore, in Patent Document 1, as a method for preventing the intrusion of earth and sand into the joint portion at the time of placing, before placing the water shielding material 1 as shown in FIG. From the diameter of the female joint portion 3 in advance in the tubular female joint portion 3 having a slit S, which is integrally fixed along the longitudinal direction of the water-shielding material body 2 on the side surface, that is, the direction in which the water shielding material body is placed. A method has been proposed in which a cylindrical tube 4 with a bottom cover having a slightly smaller diameter is inserted and the water shielding material 1 is placed, and then the cylindrical tube 4 with a bottom cover is pulled out.

Further, in Patent Document 2, as a method for preventing the intrusion of earth and sand into the joint portion at the time of placing, before the water shielding material is placed, polystyrene foam, urethane foam, low-strength mortar, chemical solution in advance in the female joint portion. A method has been proposed in which a filler such as mortar, asphalt mixture, etc. is filled in the joint after the filler is destroyed, after all the filler is destroyed and removed.
Patent 3009845 JP 2002-105949 A

  However, the method of inserting the cylindrical tube with the bottom cover into the female joint portion described in Patent Document 1 is that a small sand is placed in the gap between the female joint portion and the cylindrical tube with the bottom cover when placing the water shielding material. In addition, there is a problem that the clay tube enters and bites, making it difficult to pull out the cylindrical tube after placing, and it takes time to pull out.

  In addition, the method of filling the female joint portion described in Patent Document 2 with a filler such as polystyrene foam or urethane foam can prevent the intrusion of earth and sand when placing a water shielding material. Since all the materials were crushed, there was a problem that it was impossible to reuse the filler.

  Furthermore, in the method of completely filling the joint portion of the water shielding material described in Patent Document 1 and Patent Document 2 with the water stop material, the water stop performance of the joint portion should be confirmed after filling the water stop material. There was a problem that could not. Furthermore, when a horizontal force such as an earthquake acts on the joint part of the water shielding material, a shear force in the steel pipe axial direction acts on the joint part, and when the acting shear force exceeds the joint shear strength, the tubular female joint of the joint part There is a possibility that the water-stopping material peels off from the tubular female joint portion or the male joint portion due to a deviation between the water-stopping portion or the male joint portion and the water-stopping material, and this peeling surface may become a water channel. There was a problem that the waterproof performance of the joint could not be confirmed.

  Therefore, the present invention has been made in view of the above-described problems, and its purpose is to reliably prevent the intrusion of earth and sand into the joint portion of the water shielding panel during the installation of the water shielding panel. It is possible for the water material to exhibit a predetermined water-stopping performance, and furthermore, the muddy water is stored in the cavity formed in the joint portion after filling with the water-stopping material, and the level of the muddy water is monitored by monitoring the level of the muddy water. It is to propose a construction method and a joint structure of a joint part having water-proofing properties capable of easily and quickly confirming the water-stopping performance.

  In order to achieve the above-mentioned object, the construction method of the joint part having water-imperviousness according to the present invention is a first water-impervious material in which a tubular female joint part having a slit is integrally formed at the end part along the longitudinal direction. And a second water shielding material in which a male joint part having a convex part is integrally formed at the end along the longitudinal direction, and the convex part of the male joint part is used as the tubular female joint. In the construction method of the joint portion of the water shielding material to be inserted and engaged in the portion, the protective body is expanded by inserting the protective body that can be expanded and contracted into the tubular female joint portion, and thereby the tubular female is expanded. The first water shielding material that is in close contact with the inner surface of the joint portion is placed in the ground, the protective body is contracted, and a liquid such as muddy water is injected into the tubular female joint portion, thereby preventing intrusion of earth and sand from the slit. The protective body is pulled out from the tubular female joint while preventing the second shield. After attaching a water-swellable water stop material to the outer surface of the convex portion of the material, the convex portion is inserted into the tubular female joint portion so that the second water shielding material passes through the slit. The tubular female joint portion and the male joint portion are engaged with each other, and the space between the periphery of the slit and the outer surface of the convex portion is filled with the water-stopping material. invention).

  According to a second invention, in the first invention, the liquid stored between the inner surface of the tubular female joint portion facing the slit and the convex portion is used for monitoring the liquid level. It is characterized by that.

  According to a third invention, in the first or second invention, a protective plate covering the slit is attached to the tubular female joint portion.

  According to a fourth invention, in any one of the first to third inventions, the protective body is disposed on a cylinder body through which a fluid can pass and an outer peripheral side of the cylinder body, and can be expanded and contracted by a working fluid pressure. And a bag-like expansion body.

  In a fifth aspect of the present invention, there is provided a first water shielding material formed by integrally forming a tubular female joint portion having a slit at an end portion along the vertical direction, and a male joint portion having a convex portion along the vertical direction. And a second water shielding material formed integrally at the end portion, and the joint of the water shielding material formed by inserting and engaging the convex portion of the male joint portion into the tubular female joint portion. The structure has a structure in which a space between the slit and the convex portion is filled with a water-stop material, and a liquid such as water is stored between the inner surface of the tubular female joint portion facing the slit and the convex portion. It is characterized by being.

  According to the present invention, at the time of placing the water-impervious panel, it is possible to reliably prevent the intrusion of earth and sand into the joint portion of the water-impervious panel, so that the water-stopping material sufficiently exhibits the predetermined water-stopping performance. be able to. In addition, it is possible to easily and quickly confirm the water stop performance of the joint part by storing the muddy water in the cavity formed in the joint part after filling with the water stop material and monitoring the level of the muddy water. .

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing an installation state of a water shielding material according to the first embodiment of the present invention. As shown in FIG. 1, as a water shielding material that constitutes a water shielding wall between the waste disposal site 100 and the surrounding ground 101, for example, to a depth where the row of the water shielding panels 102 reaches the impermeable formation 103. It has been cast. On the impermeable formation 103, there is a water permeable formation 104.

  FIG. 2 is a plan view showing an installation state of the water shielding panel according to the first embodiment of the present invention. As shown in FIG. 2, the water-impervious panel 102, which is a plate-shaped water-impervious material, is integrated with the panel main body 102 a along the longitudinal direction of the panel main body, that is, the direction in which the panel main body is placed, A round tubular female joint portion 102b having a slit S, and a male joint portion 102c having a C-shaped cross section (= convex portion) fixed integrally with the other side surface along the longitudinal direction of the panel body; Is provided.

  In addition, the female joint portion 102b of the first water-impervious panel 102 and the male joint portion 102c having a C-shaped cross section of the second water-impervious panel 102 inserted into the female joint portion 102b are located around the slit S. And the male joint portion 102c are engaged through a water stop material 111 filled.

  A cavity 107 capable of storing a liquid such as water is formed between the water stop surface 102e of the male joint portion 102c and the inner peripheral surface 102f of the female joint portion 102b facing the slit S. A joint portion 106 having a water content is constructed.

  A construction method of the joint portion 106 having the water-impervious property will be described below according to the installation procedure of the water-impervious panel 102.

  FIG. 3 is a perspective view of the protective body according to the first embodiment of the present invention. As shown in FIG. 3, the protective body 105 is attached to a cylindrical pipe 105a through which fluid such as water and muddy water can pass, and to the outer peripheral side of the pipe 105a, and is expanded and contracted by working fluid pressure such as nitrogen and water. A cylindrical inflatable body 105b made of possible rubber and a tube 105c for supplying a working fluid to the inflatable body 105b are provided. In the present embodiment, for example, a packer is used as the protector 105.

  The expansion body 105b is connected to a supply device (not shown) that supplies a fluid such as nitrogen or water via the tube 105c.

  The pipe 105a is formed with a large number of locking grooves for preventing relative sliding in the axial direction of the expansion body 105b on the outer peripheral surfaces of both ends around which the expansion body 105b is attached. A thread groove for connecting the pipe 105a is formed adjacent to the outer peripheral surfaces of the both projecting ends. Therefore, it is possible to use a plurality of packers 105 connected in series according to the length of the water-impervious panel, and connect the tubes to the plurality of expansion bodies 105b, respectively, and perform individual operations of expansion and contraction of the expansion bodies 105b. Is possible.

  In the present embodiment, the protective body uses a packer in which a pipe and an expansion body are integrated. However, the protection body is not limited to this, and for example, a muddy water injection pipe and a concrete that can be expanded and contracted. Even if it is separate so as to be combined with the bag for the formwork, it is possible to feed water to the bottom of the hole, and it can be inflated by working fluid pressure to be in close contact with the female joint part, and can withstand placing. It only needs to satisfy the conditions. In addition, the operating pressure of the expansion body is appropriately changed according to the ground conditions at the construction site and the site environment such as the usable fluid.

  FIG. 4 is a flowchart showing the installation procedure of the water shielding panel according to the first embodiment of the present invention. Moreover, FIGS. 5-9 is a figure which shows the installation procedure of the water shielding panel which concerns on 1st embodiment of this invention.

First, in S10 of FIG. 4, before placing the water-impervious panel 102 into the ground, as shown in FIG. 5, an expandable / contractable packer 105 that prevents intrusion of earth and sand is installed in the longitudinal direction of the water-impervious panel. Are inserted in advance into the female joint portion 102b of the water-impervious panel 102 in such a manner that a plurality of them are connected in series so as to be equivalent to the above.
After the insertion, the supply device is driven, nitrogen is supplied to the expansion body 105b via the tube 105c, and the expansion body 105b is inflated, and the expansion body 105b is brought into close contact with the inner peripheral surface of the female joint portion 102b.
The inflatable body 105b is a cylindrical rubber body provided with reinforcing fibers therein, so that the inflatable body 105b can withstand a high working fluid pressure that cannot be withstood by the rubber body alone. The female joint portion 102b can be in close contact with the inner peripheral surface at a high pressure, and even if there is a gap as large as a slit, it does not expand locally but expands uniformly.

 In the present embodiment, nitrogen is used as the working fluid of the expansion body 105b. However, the present invention is not limited to this. For example, water may be used.

  In this embodiment, for example, a plurality of packers 105 having a length of 3.5 m and a target hole diameter of 75 mm are connected in series, and the set pressure of these packers 105 is 0.3 MPa. The number of packers 105 to be used, the size of the diameter, and the set pressure are not limited to this, but depending on the site environment such as the depth of the impermeable panel, the ground condition of the construction site, and the usable fluid. Change as appropriate.

  Next, in S11 of FIG. 4, as shown in FIG. 6, with the packer 105 mounted in the female joint portion 102b, the first water shielding panel 102 is vibrated with a vibro hammer or the like, The water-impervious panel 102 is placed in a predetermined ground 108 while applying a hammering vibration with a hydraulic hammer (not shown). When placing, since the packer 105 is mounted in the female joint portion 102b of the water shielding panel 102, earth and sand do not enter the female joint portion 102b.

  In this embodiment, the method of placing the water shielding panel 102 in an anhydrous manner is shown. However, the present invention is not limited to this, and the ground near the tip of the female joint portion is softened when placing the water shielding panel. In order to facilitate installation and prevent deformation and destruction of the hole wall, a method of injecting a liquid such as muddy water or bentonite muddy water with a water jet from the hole bottom side end of the pipe 105a of the packer 105 may be used. Good.

  Next, in S12 of FIG. 4, as shown in FIG. 7, after placing the first water shielding panel 102, the pressure of the expansion bodies 105 b of the plurality of packers 105 is sequentially changed from the hole bottom side to the hole opening side. While opening, muddy water is injected into the female joint portion 102b from the hole bottom side end of the pipe 105a to fill the female joint portion 102b with muddy water. That is, the muddy water is filled in the gap 109 between the outer peripheral surface of the expansion body 105b and the inner peripheral surface 102f of the female joint portion 102b, which are generated when the expansion body 105b contracts. This muddy water supports the hole wall through the slit, prevents the hole wall from collapsing, and prevents intrusion of earth and sand from the slit.

  Then, in a state where the expansion body 105b of the packer 105 is completely contracted and muddy water is filled in the female joint portion 102b, the packer 105 is pulled out from the female joint portion 102b while injecting muddy water. Is replaced with muddy water. When pulling out the packer 105, care should be taken so that the muddy water injection speed is higher than the pulling speed of the packer 105 and the muddy water level does not decrease.

  In the present embodiment, muddy water is used as the liquid to be fed into the female joint portion. However, the liquid is not limited to this, and for example, bentonite muddy water may be used.

  Then, in S13 of FIG. 4, as shown in FIG. 8, from the upper side of the female joint portion 102b of the first water-impervious panel 102, the second water-impervious panel 102 is vibrated with a vibro hammer or the like. A hammer or hydraulic hammer is applied to strike vibration, and the male joint portion 102c is inserted into the female joint portion 102b so that the panel body 102a of the second water-impervious panel 102 passes through the slit S.

  A pair of round steels 110 are fixed to the left and right side portions of the male joint portion 102c by welding or the like, and a water-stopping material such as rubber 111 having a water swelling property and a retarding property of curing is pasted between the pair of round steels 110 in advance. ing. In the present embodiment, for example, a rubber 111 having water swellability and cure retardance is used as the waterstop material. In addition, a water stop material is not limited to this, What is necessary is just to have water swellability and hardening retardance, such as a urethane resin.

Finally, in S14 of FIG. 4, as shown in FIG. 9, the rubber 111 gradually expands in the muddy water, and the inner peripheral surface 102f of the female joint portion 102b of the first water-impervious panel 102 and the second shield. The female joint portion 102b and the male joint portion 102c are engaged with each other by being sandwiched between the outer joint surface 102g of the male joint portion 102c of the water panel 102.
The expanded rubber 111 is sandwiched between the two faces 102f and 102g to block all the water leakage paths in the joint portion 106, and after a predetermined time has passed, is cured to ensure water-stopping.

  Further, since the rubber 111 is filled only between the inner peripheral surface 102f of the female joint portion 102b and the outer peripheral surface 102g of the male joint portion 102c, the inner surface 102e of the male joint portion 102c faces the slit S. A cavity 107 capable of storing liquid penetrating to the bottom of the hole is formed between the inner peripheral surface 102f of the female joint portion 102b.

  And it is possible to confirm the water stop performance of the rubber 111 by storing liquids such as water, mud water, bentonite mud water and the like in the cavity 107 and monitoring the water level of the liquid.

  Therefore, since the intrusion of earth and sand into the joint portion of the water shielding panel can be surely prevented at the time of placing the water shielding panel, the water stopping material can sufficiently exhibit the predetermined water stopping performance. In addition, it is possible to easily and quickly confirm the water stop performance of the joint part by storing the muddy water in the cavity formed in the joint part after filling with the water stop material and monitoring the level of the muddy water. .

  In the present embodiment, a method is used in which the rubber 111 having water swellability and cure delay is attached in advance to the left and right sides of the male joint portion 102c. However, the present invention is not limited to this. A method of applying or filling a water stop material 111 such as an adhesive having water swellability and predetermined curing delay between the inner peripheral surface 102f of the joint portion 102b and the outer peripheral surface 102g of the male joint portion 102c may be used.

  Further, since the rubber 111 having water swellability and cure retardance used in the present embodiment is an elastic body and has a followability to the deformation of the joint portion 106, the water stoppage is also provided at the time of deformation such as an earthquake. Maintain performance.

Next, the embodiment from which the joint part shape of the impermeable panel in this invention differs is shown.
In the following description, the same reference numerals are given to portions corresponding to those using the same technique as in the first embodiment, and description thereof is omitted.

  FIG. 10 is a view showing a joint portion of a PT joint water-impervious panel according to the second embodiment of the present invention. As shown in FIG. 10, the water-impervious panel 202 includes a panel main body 102a, a female joint portion 102b fixed to one side surface thereof, and is fixed integrally to the other side surface along the longitudinal direction of the panel main body. And a male joint portion 202c having a T-shape (= convex portion).

  Further, the female joint portion 102b of the first water-impervious panel 202 and the male joint portion 202c having a T-shaped cross section of the second water-impervious panel 202 inserted into the female joint portion 102b are interposed via the rubber 111. Are engaged. In this engaged state, a cavity 207 is formed between the outer peripheral surface 202e of the male joint portion 202c and the inner peripheral surface 102f of the female joint portion 102b facing the slit S so that the liquid penetrating to the hole bottom can be stored. Is done.

  The construction method of the joint part 206 having the water-impervious property will be described below in accordance with the installation procedure of the water-impervious panel 202.

  As in the first embodiment, the first water shielding panel 202 is driven into the predetermined ground 108 with the packer 105 inserted into the female joint portion 102b. Then, in a state where the expansion body 105b of the packer 105 is completely contracted and the muddy water is filled in the female joint portion 102b, the packer 105 is pulled out from the female joint portion 102b while injecting muddy water. Is replaced with muddy water.

  Next, from the upper side of the female joint portion 102b of the first water-impervious panel 202, the second water-impervious panel 202 is vibrated with a vibro hammer or the like, or a striking vibration is imparted with a diesel hammer or a hydraulic hammer, The male joint portion 202c is driven and inserted into the female joint portion 102b so that the panel body 102a of the second water-impervious panel 202 passes through the slit S. Rubber 111 is affixed in advance to both side portions of the side surface of the panel main body, which is the outer surface of the male joint portion 202c. The expanded rubber 111 blocks the gap between the vicinity of the slit S in the female joint portion 102b, which is a water leakage path in the joint portion 206, and the male joint portion 202c, thereby ensuring water blocking.

  Further, since the rubber 111 is filled only between the vicinity of the slit S in the female joint portion 102b and the male joint portion 202c, the outer peripheral surface 202e of the male joint portion 202c and the female joint portion facing the slit S are provided. A cavity 207 capable of storing liquid penetrating to the hole bottom is formed between the inner peripheral surface 102f of 102b.

  And it is possible to confirm the water stop performance of the rubber 111 by storing muddy water in the cavity 207 and monitoring the level of the muddy water.

  FIG. 11: is a figure which shows the coupling | joint part of the T joint water impervious panel with a P-stopper which concerns on 2nd embodiment of this invention. As shown in FIG. 11, the water shielding panel 212 includes a panel main body 102a, a female joint portion 102b, a male joint portion 202c, a stopper 212g for preventing entry into the female joint portion 102b, and a female joint portion 102b. The stopper 212h is provided to prevent the slipping out.

  The female joint portion 102b of the first water shielding panel 212 and the male joint portion 202c and the stopper 212h having a T-shaped cross section of the second water shielding panel 212 inserted into the female joint portion 102b are rubber. 111 is engaged. In such an engaged state, a cavity 207 capable of storing liquid is formed between the outer peripheral surface 202e of the male joint portion 202c and the inner peripheral surface 102f of the female joint portion 102b.

  After placing the first impermeable panel 212, when the second impermeable panel 212 is implanted, the tip of the second impermeable panel becomes vertical due to the difference in the hardness of the ground. In some cases, the tip of the second water-impervious panel 212 advances in a direction away from or approaching the first water-impervious panel 212 without being driven. At this time, the second water-impervious panel 212 can be driven into a predetermined position by the action of a stopper 212g for preventing entry into the female joint portion 102b and a stopper 212h for preventing withdrawal from the female joint portion 102b. It becomes possible.

  FIG. 12 is a view showing a joint portion of a square-T joint water-proof panel according to the second embodiment of the present invention. As shown in FIG. 12, the water-impervious panel 222 includes a panel main body 102a, a rectangular tubular female joint portion 222b having a slit S, which is integrally fixed to one side surface of the panel main body 102a along the vertical direction of the panel main body. A joint 202c.

  Further, the female joint portion 222b of the first water shielding panel 222 and the male joint portion 202c having a T-shaped cross section of the second water shielding panel 222 inserted into the female joint portion 222b are interposed via the rubber 111. Are engaged. In this engaged state, a cavity 207 is formed between the outer peripheral surface 202e of the male joint portion 202c and the inner peripheral surface 222f of the female joint portion 222b.

  FIG. 13: is a figure which shows the coupling | joint part of the T joint water impervious panel with a square-stopper which concerns on 2nd embodiment of this invention. As shown in FIG. 13, the water shielding panel 232 includes a panel body 102a, a female joint portion 222b, a male joint portion 202c, a stopper 212g, and a stopper 212h.

  The female joint portion 222b of the first water shielding panel 232 and the male joint portion 202c having a T-shaped cross section and the stopper 212h of the second water shielding panel 232 inserted into the female joint portion 222b are rubber. 111 is engaged. In such an engaged state, a cavity 207 capable of storing liquid is formed between the outer peripheral surface 202e of the male joint portion 202c and the inner peripheral surface 222f of the female joint portion 222b.

  Next, an embodiment in which a protective plate that covers the slit is attached to the inner peripheral surface of the female joint portion of the water shielding panel in the present invention will be described.

  Fig.14 (a) is a top view of the impermeable panel which concerns on 3rd embodiment of this invention, FIG.14 (b) is a top view which shows the installation condition of the impermeable panel which concerns on 3rd embodiment of this invention. It is. As shown in FIG. 14 (a), a water shielding panel 302, which is a plate-like water shielding material, is provided on the inner peripheral surface of the panel main body 102a, the female joint portion 102b, the male joint portion 102c, and the female joint portion 102b. And a protective plate 300 that covers and is attached along the axial direction of the female joint portion so as to close the slit S portion.

  In the present embodiment, for example, a cuttable asphalt sheet material 300 is used for the protective plate 300. In the present embodiment, the asphalt-based sheet material 300 is used, but is not limited thereto, and may be a thin plate having a function of preventing intrusion of earth and sand from the slit. A resin-based sheet material or a thin iron plate may be used.

  As shown in FIG. 14 (b), a female joint portion 102b of the first water shielding panel 302 and a male joint having a C-shaped cross section of the second water shielding panel 302 inserted into the female joint portion 102b. The portion 102c is engaged through a rubber 111 filled between the periphery of the slit S and the male joint portion 102c. A cavity 107 capable of storing a liquid such as water is formed between the outer peripheral surface 102 g of the male joint portion 102 c and the inner peripheral surface 102 f of the female joint portion 102 b facing the slit S. A joint portion 306 having a water content is constructed.

  A construction method of the joint portion 306 having the water-impervious property will be described below according to the installation procedure of the water-impervious panel 102.

  In the same manner as in the first embodiment, the first water-impervious panel with the packer 105 inserted into the female joint portion 102b having the asphalt-based sheet material 300 covered and stuck so as to close the slit S on the inner peripheral surface. 302 is placed in a predetermined ground 108. When placing, since the packer 105 is mounted in the female joint portion 102b of the water-impervious panel 302, earth and sand do not enter the female joint portion 102b.

  Then, the packer 105 is completely contracted, and the packer 105 is pulled out from the female joint portion 102b while injecting the muddy water while the female joint portion 102b is filled with the muddy water. Here, since the asphalt-based sheet material 300 is stuck in the female joint portion 102b so as to close the slit S, the outer peripheral surface of the expansion body 105b and the female joint generated when the expansion body 105b of the packer 105 contracts. Sediment does not enter the gap with the inner peripheral surface 102f of the portion 102b.

  Next, from above the female joint portion 102b of the first water-impervious panel 302, the second water-impervious panel 302 is vibrated with a vibro hammer or the like, or a hammer vibration is imparted with a diesel hammer or a hydraulic hammer, The male joint portion 102c is changed to the female joint portion so that the panel main body 102a of the second water shielding panel 302 passes through the slit S while the asphalt-based sheet material is broken by the panel main body 102a of the second water shielding panel 302. Insert into 102b.

A pair of round steels 110 are fixed to the left and right side portions of the male joint portion 102c by welding or the like, and a rubber 111 having water swellability and curing delay property is pasted between the pair of round steels 110 in advance.
The rubber 111 gradually expands in the muddy water, and is formed on both the inner peripheral surface 102f of the female joint portion 102b of the first water shielding panel 302 and the outer peripheral surface 102g of the male joint portion 102c of the second water shielding panel 302. The female joint portion 102b and the male joint portion 102c are engaged with each other.
Further, since the rubber 111 is filled only between the inner peripheral surface 102f of the female joint portion 102b and the outer peripheral surface 102g of the male joint portion 102c, the inner surface 102e of the male joint portion 102c faces the slit S. A cavity 107 capable of storing liquid penetrating to the bottom of the hole is formed between the inner peripheral surface 102f of the female joint portion 102b.

It is possible to confirm the water stopping performance of the rubber 111 by storing liquid such as water, mud water, bentonite mud water, etc. in the cavity 107 and monitoring the water level of the liquid. Even in the construction method of the water shielding panel according to the embodiment, when the water shielding panel is placed, in order to surely prevent the intrusion of earth and sand into the joint portion of the water shielding panel, the water stopping material has a predetermined water stopping performance. It becomes possible to demonstrate. In addition, it is possible to easily and quickly confirm the water stop performance of the joint part by storing the muddy water in the cavity formed in the joint part after filling with the water stop material and monitoring the water surface of the muddy water. It becomes.

  In all the embodiments, the connection method of the water shielding panel which is a plate-shaped water shielding material has been described. However, the present invention is not limited to this, and for example, a steel pipe sheet pile which is a tubular water shielding material may be used. Moreover, in all the embodiments, the method of placing the water-impervious panel in the ground is shown, but the present invention is not limited to the ground, and for example, it can be placed in soil cement.

It is a side view which shows the installation condition of the water shielding material which concerns on 1st embodiment of this invention. It is a top view which shows the installation condition of the impermeable panel which concerns on 1st embodiment of this invention. It is a perspective view of a protector concerning a first embodiment of the present invention. It is a flowchart which shows the installation procedure of the water shielding panel which concerns on 1st embodiment of this invention. It is a figure which shows the state which inserted the packer in the female coupling part of the water-impervious panel which concerns on 1st embodiment of this invention, and was expanded. It is a figure showing the state where the 1st impermeable panel concerning a first embodiment of the present invention was laid in the ground. It is a figure which shows the state which contracted the packer which concerns on 1st embodiment of this invention, and was filled with the muddy water inside the female joint part. It is a figure showing the state where the 2nd impermeable panel concerning a first embodiment of the present invention was laid. It is a figure which shows the state which filled the water stop material in the joint part which concerns on 1st embodiment of this invention. It is a figure which shows the joint part of the PT joint water impervious panel which concerns on 2nd embodiment of this invention. It is a figure which shows the joint part of the T joint water impervious panel with P-stopper which concerns on 2nd embodiment of this invention. It is a figure which shows the joint part of the square-T joint water impervious panel which concerns on 2nd embodiment of this invention. It is a figure which shows the coupling | joint part of the square-stopper T joint water-proof panel which concerns on 2nd embodiment of this invention. It is a top view of the impermeable panel concerning a third embodiment of the present invention. It is a top view which shows the installation condition of the water shielding panel which concerns on 3rd embodiment of this invention. It is a figure which shows the conventional Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Waste disposal site 101 Surrounding ground 102 Water-impervious panel 102a Panel main body 102b Female joint part 102c Male joint part 102e Inner peripheral surface 102f Inner peripheral surface 102g Outer peripheral surface 103 Impervious stratum 104 Pervious stratum 105 Packer 105a Pipe 105b Expansion body 105c Tube 106 Joint part 107 Cavity 108 Ground 109 Crevice 110 Round steel 111 Rubber (= Water stop material)
202 Water shielding panel 202c Male joint portion 202e Outer peripheral surface 206 Joint portion 207 Cavity 212 Water shielding panel 212c Male joint portion 212g Stopper 222 Water shielding panel 222b Female joint portion 222f Inner circumferential surface 232 Water shielding panel 300 Sheet material (= protection plate) 302 Water shielding panel S Slit

Claims (5)

A first water shielding material formed by integrally forming a tubular female joint portion having a slit along the longitudinal direction at an end portion, and a male joint portion having a convex portion integrally formed along the longitudinal direction. In the construction method of the joint portion of the water shielding material that is inserted into and engaged with the convex portion of the male joint portion into the tubular female joint portion, using the second water shielding material formed in
After the protective body that can be expanded and contracted is inserted into the tubular female joint part, the protective body expands to place the first water shielding material in close contact with the inner surface of the tubular female joint part in the ground. And
The protective body is pulled out from the tubular female joint part while contracting the protective body and preventing intrusion of earth and sand from the slit by injecting a liquid such as muddy water into the tubular female joint part.
After attaching a water-swellable water-stopping material to the outer surface of the convex portion of the second water shielding material, the convex portion is connected to the tubular female so that the second water shielding material passes through the slit. It is inserted into a joint part, and the tubular female joint part and the male joint part are engaged with each other, and the space between the periphery of the slit and the outer surface of the convex part is filled with the water stop material. The construction method of the joint part which has a water-impervious property.   The joint portion according to claim 1, wherein the liquid stored between the inner surface of the tubular female joint portion facing the slit and the convex portion is used for liquid level monitoring. Construction method.   The construction method of the joint part which has the water-blocking property of Claim 1 or 2 characterized by sticking the protection board which covers the said slit to the said tubular female joint part.   The said protective body is provided with the cylinder body which a fluid can pass, and the bag-shaped expansion body which is arrange | positioned by the outer periphery side of a cylinder body, and can be expanded / contracted by a working fluid pressure. The construction method of the joint part which has the water-blocking property in any one of. A first water shielding material formed by integrally forming a tubular female joint portion having a slit along the longitudinal direction at an end portion, and a male joint portion having a convex portion integrally formed along the longitudinal direction. A joint structure of a water shielding material formed by inserting and engaging the convex portion of the male joint portion into the tubular female joint portion, using a second water shielding material formed on
A space between the slit and the convex portion is filled with a water-stop material, and a liquid such as water is stored between the inner surface of the tubular female joint portion facing the slit and the convex portion. Features a joint structure of water shielding material.

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