JP4839145B2 - Construction method and joint structure of joint part of water shielding material - Google Patents

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 with the water-stopping material, the earth and sand that has entered the joint when the water-blocking material is placed is removed by a removal method such as a water jet or an air lift and washed. It is common to do.

  However, since the diameter of the joint portion is small, 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 jets, air lifts, and the like is lowered, so that it is difficult to remove earth and sand, which requires much time.

  Therefore, in Patent Document 1, as a method for preventing the intrusion of earth and sand into the joint at the time of placing, as shown in FIG. 13, polyethylene, polypropylene, and vinyl chloride are previously provided in the slit S portion of the female joint 1 of the steel pipe sheet pile. A method has been proposed in which a sediment intrusion prevention plate 2 made of, for example, is fitted, and the bottom portion of the female joint 1 is covered with a steel plate or the like and a steel sheet pile is placed.

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, an adhesive tape made of cloth, paper, resin, metal foil or the like is pasted on the slit portion of the female joint of the steel pipe sheet pile in advance. In addition, a method has been proposed in which a water-blocking material 1 is placed by attaching a sand and sand intrusion prevention member for preventing soil and sand from entering the female joint directly below the female joint and below the steel pipe sheet pile.
Real Kaihei 7-29017 JP-A-9-78569

  However, in the method of fitting the earth and sand intrusion prevention plate 2 made of polyethylene or the like to the slit S portion described in Patent Document 1, when a steel pipe sheet pile is placed in the ground, a large earth pressure and water pressure are generated. Therefore, there is a problem that the earth and sand intrusion prevention plate 2 is deformed and a gap is formed between the slit S and the earth and sand invasion prevention plate 2 so that the earth and sand enters. Furthermore, there is a problem in that stones and sand may enter and bite into the gaps generated in this way, and it may not be possible to completely prevent the intrusion of earth and sand. Further, the work for processing the earth and sand intrusion prevention plate 2 to fit into the slits S has a problem that it takes time and effort, and the cost of material becomes high.

  Moreover, the method of sticking an adhesive tape made of cloth, paper, resin, metal foil or the like on the slit portion described in Patent Document 2 causes a large earth pressure and water pressure to be applied to the adhesive tape when a steel pipe sheet pile is placed in the ground. In order to act, there was a problem that the adhesive tape was deformed and the adhesion was peeled off. In addition, there is a problem that the adhesive tape may break due to gravel or slender stone in the ground during the placement of the steel pipe sheet pile.

  Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to prevent the intrusion of earth and sand into the joint portion of the water-impervious panel at the time of placing the water-impervious panel and to prevent the water from stopping. In the cavity formed in the joint after the water-stopping material exhibits the water-stopping effect, and stores liquids such as water and muddy water. By proposing construction methods and joint structures for water-tight joints that can easily and quickly confirm the water-stop performance of joints by monitoring properties such as liquid level or electrical conductivity. is there.

In order to achieve the above-mentioned object, the method for constructing a joint portion having a water-imperviousness according to the present invention is a first shielding structure in which a round tubular female joint portion having a slit is integrally formed at the end portion along the vertical direction. Using a water material and a second water shielding material formed by integrally forming a male joint portion having a convex portion having a C-shaped cross section along the longitudinal direction at an end portion, the male joint portion In the construction method of the joint portion of the water shielding material for inserting and engaging the convex portion into the round tubular female joint portion, the lid for closing the bottom portion of the tubular female joint portion is attached and the slit is covered so as to cover the slit The first water shielding material attached by welding an iron plate to the outer peripheral surface of the tubular female joint is placed in the ground, and a water-swelling stop is provided on the outer surface of the convex portion of the second water shielding material. water material, both end portions of the slit side of the water stop material, such than both end portions of the steel plate reaches a position of the slit-side After mounting, the while second impermeable material cutting the steel plate, the convex portion so as to pass through the slit is inserted into the tubular female fitting portion, the said tubular female coupling male joint And a portion between the periphery of the slit and the outer surface of the convex portion is filled with the water-stopping material (first invention).

  According to the construction method of the joint portion having water-imperviousness according to the present invention, in order to place the water shielding material having the iron plate attached by welding so as to cover the slit of the tubular female joint portion, Even if gravel or thin stones inside the steel plate come into contact with the iron plate or a large earth pressure or water pressure acts on the iron plate after placement, the iron plate is not damaged or peeled off from the tubular female joint. Furthermore, since a water blocking material is placed by attaching a lid that closes the bottom of the tubular female joint portion, it is possible to reliably prevent intrusion of earth and sand into the female joint portion.

  Moreover, in order to insert a convex-shaped part in a tubular female joint part so that a 2nd water-impervious material may cut | disconnect an iron plate and may pass the slit of a 1st water-impervious material, the cut iron plate and 2nd A gap is formed between the material and the water-impervious material. Since this gap is small, the amount of sand that passes through the gap is small, and the particle size of the earth and sand that can pass through this gap is small. Therefore, it can be easily removed from the tubular female joint. As a result, the earth and sand in the tubular female joint portion can be easily removed, and the water-stopping material can be filled in close contact with the periphery of the slit and the outer surface of the convex portion, so that the water in the joint portion can be surely stopped. Is possible.

  According to a second invention, in the first invention, a cavity is formed between an inner surface of the tubular female joint portion facing the slit and the convex portion, and the liquid is stored in the cavity to be liquid level or electric. It is characterized in that properties such as conductivity are monitored to check the water stoppage of the waterstop material.

  According to the method for constructing a joint portion having water-imperviousness according to the present invention, liquid such as water and muddy water is stored in a cavity formed in the joint portion after being filled with a water-stopping material, and the liquid level or electrical conductivity of the liquid is stored. By monitoring the properties such as the above, it becomes possible to easily and quickly confirm the water stop performance of the joint portion.

The joint structure of the water shielding material of the third invention is a first water shielding material in which a round tubular female joint portion having a slit is integrally formed at the end along the longitudinal direction, and a C-shaped cross section. And a second water shielding material formed integrally at the end along the vertical direction, and the convex portion of the male joint portion is the round tubular female. It is a joint structure of a water shielding material that is inserted into and engaged with a joint portion, and a lid that covers the bottom of the round tubular female joint portion is attached, and an iron plate is welded and attached so as to cover the slit the first impermeable material is Da設into the ground, before Symbol convex external surface of water-swellable water stopping material of the end portion of the slit side of the water stopping material is from the end portion of the iron plate before as well the said kicked Installing to reach to a position of the slit-side second impervious material, it passes through the slit by cutting the steel plate Insert the convex portions on the round tubular female coupling portion, between the outer surface of the slit around said convex portion is inflated with engaging the said and the round tubular female coupling male coupling it is filled with the water stopping material, characterized in that the liquid such as water is stored between the slits the round tubular female coupling part facing the inner surface and the convex portion of the.

  According to the present invention, the lid for closing the bottom portion of the tubular female joint portion is attached, and the first water shielding material attached by welding the iron plate to the outer peripheral surface of the tubular female joint portion so as to cover the slit is driven into the ground. The first water-blocking material is cut by the second water-blocking material with the water-swellable water-stopping material attached to the outer surface of the convex portion of the male joint portion so as to pass through the slit. By inserting the convex portion of the water shielding material 2 into the tubular female joint portion of the first water shielding material and engaging the tubular female joint portion and the male joint portion, Intrusion of earth and sand into the joint portion can be prevented.

  In addition, since there is almost no intrusion of earth and sand into the joint when the water shielding material is placed, the water-stopping material sufficiently exhibits the predetermined water-stopping performance, and the inner surface of the tubular female joint facing the slit is convex. It is possible to reliably prevent the intrusion of earth and sand and water into the cavity formed between the two.

  Furthermore, by storing liquid such as water and muddy water in the cavity and monitoring properties such as the liquid level or electrical conductivity of the liquid, the water stop performance of the joint can be easily and quickly confirmed. .

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 present embodiment. 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; And an arc-shaped iron plate 105 attached to the outer peripheral surface of the female joint portion 102b so as to cover the slit S, and a lid 112 attached so as to close the bottom of the female joint portion 102b.

  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 via a water stop portion 115 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 flowchart showing the installation procedure of the water shielding panel according to the present embodiment. Moreover, FIGS. 4-9 is a figure which shows the installation procedure of the water shielding panel which concerns on this embodiment.

  First, in S10 of FIG. 3, as shown in FIG. 4, the cover 112 that covers the bottom of the female joint portion 102b of the water shielding panel 102 is covered with the outer peripheral surface of the female joint portion 102 so as to cover the slit S of the female joint portion 102b. Attached to the arc-shaped iron plate 105.

  The lid | cover 112 consists of a circular iron plate which has the same diameter as the female joint part 102b, and is attached to the female joint part 102b by welding.

  The arc-shaped iron plate 105 has a thickness that can be cut by the panel main body 102a of the water shielding panel 102, and is attached to the female joint portion 102b by welding. In the present embodiment, for example, the arc-shaped iron plate 105 has a thickness of 0.2 mm, and the water shielding panel 102 has a thickness of the water shielding panel main body 102a of 6.0 mm. For example, the iron plate 105 having a thickness of about 0.2 mm does not break even when gravel or fine stones in the ground come into contact during placement or when large earth pressure or water pressure acts after placement. In addition, the thickness of the iron plate 105 is appropriately changed according to the ground condition and the like of the construction site.

  Next, in S11 of FIG. 3, as shown in FIG. 5, the first water-impervious panel 102 having the lid 112 and the iron plate 105 is vibrated with a vibro hammer or the like, or a striking vibration is caused with a diesel hammer or a hydraulic hammer. The water-impervious panel 102 is placed in a predetermined ground 108 (not shown). When placing, since the lid 112 and the iron plate 105 are attached to the female joint portion 102b of the water shielding panel 102, earth and sand do not enter the female joint portion 102b.

  Next, in S12 of FIG. 3, as shown in FIG. 6, from the upper side of the female joint portion 102b of the first water shielding panel 102, the second water shielding panel 102 is vibrated with a vibro hammer or the like. The male joint portion 102c is passed through the slit S while the steel plate 105 is cut by the lower edge of the panel main body 102a of the second water-impervious panel 102 by applying striking vibration with a dizel hammer or a hydraulic hammer. The joint part 106 formed by inserting the male joint part 102c and the female joint part 102b is formed by being inserted into the part 102b.

  Moreover, the water stop part 115 is each provided in the right-and-left both sides in the outer peripheral surface of the male coupling part 102c. The water stop portion 115 is composed of a pair of round steels 110 and a water stop material 111 having water swellability and disposed between the pair of round steels 110, and the pair of round steels 110 are fixed by welding or the like. The waterstop material is affixed with an adhesive or the like. In the present embodiment, for example, rubber having water swellability is used as the water blocking material 111. In addition, the water stop material 111 is not limited to this, What is necessary is just to have water swelling property, such as a urethane resin.

  In S13 of FIG. 3, the earth and sand having a small particle diameter that has entered the female joint portion 102b through the gap 109 formed by the panel main body 102a and the cut surface of the iron plate 105 are cleaned by washing the inside of the joint portion 106. Remove.

  Specifically, as shown in FIG. 7, the water injection pipe 114 of the water jet 113 is inserted to the bottom of the hole in the joint portion 106, and pressurized water such as muddy water is injected into the joint portion 106 from the tip of the pipe. Remove the earth and sand present inside. After a while after cleaning the inside of the joint portion 106, the water blocking material 111 applied to the outer peripheral surface 102g of the male joint portion 102c gradually expands in the muddy water as shown in FIG. The female joint portion 102b and the male joint portion 102c are engaged with each other by being sandwiched between both the inner peripheral surface 102f of the female joint portion 102b and the outer peripheral surface 102g of the male joint portion 102c of the second water shielding panel 102.

The expanded water-stopping material 111 blocks all the water leakage paths in the joint portion 106 by being sandwiched between the two faces 102f and 102g, and ensures water-stopping after a predetermined time has elapsed.
Further, since the water blocking material 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 peripheral surface 102e of the male joint portion 102c, the slit S, A cavity 107 capable of storing liquid penetrating to the bottom of the hole is formed between the opposed inner joint surface 102f of the female joint portion 102b.

  Then, a liquid such as water, mud water, bentonite mud water, etc. is stored in the cavity 107, and the water stopping performance of the water stopping material 111 is confirmed by monitoring the properties of the liquid level or electrical conductivity. Is possible.

  In the present embodiment, a method in which the water-swelling water-stopping material 111 is attached in advance to the left and right side portions of the male joint portion 102c is used. However, the present invention is not limited to this. For example, the female joint portion A method of applying or filling a water stop material 111 having water swellability and predetermined curing delay between the inner peripheral surface 102f of 102b and the outer peripheral surface 102g of the male joint portion 102c may be used. In addition, since the water-swelling material 111 having water swellability used in the present embodiment is an elastic body and has followability to the deformation of the joint portion 106, the water-stopping performance is also provided during deformation such as an earthquake. maintain.

  Next, the embodiment from which the joint part shape of the impermeable panel in this invention differs is shown. In the following description, portions corresponding to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences are mainly described.

FIG. 9 is a view showing a joint portion of the PT joint water-impervious panel according to the first reference example of the present invention. As shown in FIG. 9, the water-impervious panel 202 is integrally fixed to the panel main body 102a, the female joint portion 102b, and the other side surface along the vertical direction of the panel main body, and has a T-shaped cross section (= convex portion). ) Having a male joint portion 202c, an iron plate 105, and a lid 112.

  Further, the female joint portion 102b of the first water shielding panel 202 and the male joint portion 202c having a T-shaped cross section of the second water shielding panel 202 inserted into the female joint portion 102b are the water stop material 111. Is engaged through. 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. Thus, the joint 206 having the water shielding property of the water shielding panel 202 is constructed.

  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, a lid 112 that closes the bottom of the female joint portion 102b of the water shielding panel 202 is attached, and an arcuate iron plate 105 is attached to the outer peripheral surface of the female joint portion 102b by welding so as to cover the slit S. The first water shielding panel 202 is placed in the ground 108. Next, the male joint portion 202c is passed through the slit S while the panel body 102a of the second water-impervious panel 202 cuts the iron plate 105 of the female joint portion 102b of the first water-impervious panel 202. Insert and insert into 102b. The water stop material 111 is affixed beforehand to the both sides of the panel main body side surface which is the outer surface of this male joint part 202c. And the expanded water stop material 111 interrupts | blocks between the vicinity part of the slit S in the female joint part 102b which is a water leak path | route in the joint part 206, and the male joint part 202c, and ensures water stop.

Further, since the water blocking material 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 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 the joint portion 102b.
It is possible to confirm the water stop performance of the water stop material 111 by storing liquid such as water and muddy water in the cavity 207 and monitoring the liquid level or properties such as electric conductivity. is there.

FIG. 10 is a view showing a joint portion of a T-joint water-impervious panel with a P-stopper according to a second reference example of the present invention . As shown in FIG. 10, 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, the iron plate 105, and the lid 112 are provided.

  Also, the female joint portion 102b of the first water shielding panel 212 and the male joint portion 202c having a T-shaped cross section and the stopper 212h of the second water shielding panel 212 inserted into the female joint portion 102b are stopped. The water material 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.

  A lid 112 that closes the bottom of the female joint portion 102b of the water shielding panel 212 is attached, and an arc-shaped iron plate 105 is attached to the outer peripheral surface of the female joint portion 102b by welding so as to cover the slit S, and the first water shielding panel 212 is attached. After the placement, when placing the second impermeable panel 212, the second impermeable panel is not driven vertically due to the difference in the hardness of the ground, etc. The tip may move away from or closer to the first impermeable panel 212. 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. 11 is a view showing a joint portion of a square-T joint water-proof panel according to a third reference example of the present invention . As shown in FIG. 11, the water-impervious panel 222 includes a panel main body 102 a, a rectangular tubular female joint portion 222 b that is integrally fixed to one side surface of the panel main body 102 along the longitudinal direction of the panel main body, and has a slit S, The joint portion 202c, a strip-shaped iron plate 205 attached to the outer peripheral surface of the female joint portion 222b so as to cover the slit S, and a square shape that is substantially the same shape as the outer periphery of the female joint portion 222b, And a lid 204 attached to close the bottom.

  Further, the female joint portion 222b of the first water-blocking panel 222 and the male joint portion 202c having a T-shaped cross section of the second water-blocking panel 222 inserted into the female joint portion 222b are the water stop material 111. Is engaged through. 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. 12 is a diagram showing a joint portion of a square-stopper T-joint impermeable panel according to a fourth reference example of the present invention . As shown in FIG. 12, the water shielding panel 232 includes a panel main body 102a, a female joint portion 222b, a male joint portion 202c, a stopper 212g, a stopper 212h, an iron plate 205, and a lid 204.

  Further, 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 stopped. The water material 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.

Above, according to the construction method of the joint portion in the implementation embodiments and reference examples described, the female coupling portion 102b, water blocking panel fitted with iron plates 105 and 205 so as to cover the slit S of 222b 102,202,212,222 In order to place 232 in the ground, gravel and fine stones in the ground contact the iron plates 105 and 205 at the time of placement, or large earth pressure and water pressure act on the iron plates 105 and 205 after placement. However, the iron plates 105 and 205 are not damaged or peeled off. Furthermore, since the lids 112 and 204 that close the bottoms of the female joint portions 102b and 222b are attached and the water shielding panels 102, 202, 212, 222, and 232 are driven, the intrusion of earth and sand into the female joint portions 102b and 222b is prevented. It becomes possible to prevent reliably.

  Further, the second water-impervious panels 102, 202, 212, 222, 232 pass through the slits S of the first water-impervious panels 102, 202, 212, 222, 232 while cutting the iron plates 105, 205. Between the cut iron plates 105 and 205 and the second water shielding panels 102, 202, 212, 222, and 232 for inserting the convex portions of the male joint portions 102 c and 202 c into the female joint portions 102 b and 222 b However, since the gap 109 is small, the amount of earth and sand entering the female joint portions 102b and 222b is small, and the particle size is small. For this reason, it can be easily removed from the joints 106 and 206 by cleaning with an air lift or the like. As a result, the earth and sand in the joint portions 106 and 206 are completely eliminated, and the water-stopping material 111 can be filled in close contact with the periphery of the slit S and the outer surface 102g of the convex portion or the convex portion 202c. It is possible to reliably stop the water inside the joint portions 106 and 206.

  Moreover, liquids such as water and muddy water are stored in the cavities 107 and 207 formed in the joint portions 106 and 206 after being filled with the water blocking material 111, and properties such as the liquid level or electrical conductivity of the liquid are monitored. By doing, the water stop performance of the joint parts 106 and 206 can be confirmed easily and quickly.

Note that in the implementation embodiments and reference examples described above, has been shown how to connect the water-impervious panel 102,202,212,222,232 a plate-shaped water shielding material is not limited thereto, For example, a steel pipe sheet pile which is a tubular water shielding material may be used.

Further, in the implementation embodiments and reference examples described above, has been described how to pouring the water barrier panel 102,202,212,222,232 in the ground, it is not limited thereto, for example, soil It is also possible to place in 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 this embodiment. It is a flowchart which shows the installation procedure of the impermeable panel which concerns on this embodiment. It is a figure which shows the state which attached the iron plate to the female joint part of the water shielding panel which concerns on this embodiment. It is a figure showing the state where the 1st impermeable panel concerning this embodiment was laid in the ground. It is a figure showing the state where the 2nd impermeable panel concerning this embodiment was laid in the ground. It is a figure which shows the state which wash | cleans the inside of the coupling part which concerns on this embodiment. It is a figure which shows the state which the water stop material expanded in the joint part which concerns on this embodiment. It is a figure which shows the joint part of the PT joint water-shielding panel which concerns on the 1st reference example of this invention. It is a figure which shows the joint part of the T joint water impervious panel with a P-stopper which concerns on the 2nd reference example of this invention . It is a figure which shows the joint part of the square-T joint water impervious panel which concerns on the 3rd reference example of this invention . It is a figure which shows the joint part of the square-stopper T joint water-proof panel with a stopper which concerns on the 4th reference example 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 Iron plate 106 Joint part 107 Cavity 108 Ground 109 Clearance 110 Round steel 111 Water stop material 112 Lid 113 Water jet 114 Water injection pipe 115 Water stop part 202 Water shield panel 202c Male joint part 202e Outer peripheral surface 204 Lid 205 Iron plate 206 Joint part 207 Cavity 212 Water shield panel 212g Stopper 222 Water shielding panel 222b Female joint portion 222f Inner peripheral surface 232 Water shielding panel S Slit

Claims (3)

A first water shielding material formed by integrally forming a round tubular female joint portion having a slit at an end portion in the longitudinal direction and a male joint portion having a convex portion having a C-shaped cross section in the longitudinal direction. And a second water shielding material formed integrally at the end along the same, and the convex portion of the male joint portion is inserted into and engaged with the round tubular female joint portion. In the construction method of the joint part,
It is attached a lid for closing the bottom of the round tubular female coupling, the first water shielding material mounted by welding a steel plate to the outer peripheral surface of the round tubular female coupling so as to cover the slit in the ground And
A water-swellable water-stopping material is applied to the outer surface of the convex portion of the second water-blocking material, and the end of the water-stopping material on the slit side is closer to the slit side than the end of the iron plate. After mounting so as to reach, the convex portion is inserted into the circular tubular female joint so that the second water shielding material cuts the iron plate and passes through the slit, and the round tubular A joint portion having water-blocking characteristics, wherein the joint portion engages the female joint portion and the male joint portion and is filled with the water-stop material between the periphery of the slit and the outer surface of the convex portion. Construction method. Forming a cavity between the inner surface of the round tubular female joint portion facing the slit and the convex portion;
The method for constructing a joint part according to claim 1, wherein liquid is stored in the cavity, and properties such as a liquid level or electric conductivity are monitored to check water-stopping property of the water-stopping material. A first water shielding material formed by integrally forming a round tubular female joint portion having a slit at an end portion in the longitudinal direction and a male joint portion having a convex portion having a C-shaped cross section in the longitudinal direction. And a second water shielding material formed integrally at the end along the water shielding material formed by inserting the convex portion of the male joint portion into the circular tubular female joint portion and engaging with each other. A joint structure of materials,
It is attached a lid for closing the bottom of the round tubular female coupling, the first water shielding material mounted by welding a steel plate to cover the slit Da設into the ground, before Symbol convex portion the water-swellable water stopping material outer surface, the second water blocking an end portion of the slit side of the water stopping material is kicked Installing to reach to a position of the slit-side than an end portion of the iron plate with wood is, by cutting the steel plate inserting the convex portion so as to pass through the slit in the round tubular female coupling portion, it engages with the said round tubular female coupling male coupling between the between the slit near and said outer surface of said convex portion is filled with the water stopping material that expands, the slit and opposite to the round tubular female coupling of the inner surface the convex portion A watertight material joint structure characterized in that liquid such as water is stored.

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