JP2002256800A - Water cut-off method for underground installation element and cut-off seal for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cut-off method for an underground installation element and a cut-off seal for it capable of simplifying structure of a connection part between a cut-off material and an installation element for easily manufacturing the connection part at a low cost, reducing its size and weight, improving its water cut-off effect, eliminating requirement for complicated cut-off material winding work and a working space in a construction field, and performing this kind of work reasonably and easily, capable of performing water cut-off for an installation element having a complex shape, and capable of preventing deterioration in a water cut-off effect in the corner part of the connection part by means of an easier structure. SOLUTION: The elastically deformable cut-off seals 6 and 7 are arranged between the connection parts of the adjacent underground installation elements 2 and 3. In formation, the shape of the cut-off seals 6 and 7 is substantially equalized to that of the connection end parts on the approximately mutually flushed faces of the underground installation elements 2 and 3. The cut-off seals 6 and 7 are arranged between the connection parts on the approximately mutually flushed faces of the underground installation elements 2 and 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention simplifies the structure of a joint between a water-stopping material and a laying element, can be manufactured at a low cost and easily, and can reduce their size and weight and improve the water-stopping effect. Eliminates complicated winding work of water material and secures working space at the construction site, makes this kind of work reasonable and easy, and can cope with water stoppage of laying elements of complicated shape, making it even simpler. The present invention relates to a water stopping method for an underground laying element and a water stopping seal thereof, which can prevent a decrease in a water stopping effect at a corner portion of a joint portion with a configuration.

[0002]

2. Description of the Related Art Conventionally, for example, a method for stopping water at a junction portion of a tunnel lining segment is disclosed in Japanese Unexamined Patent Publication No.
As described in the publication, a flange is provided on the periphery of the joint portion of the segment, a mounting groove is provided on the bonding surface of the flange, a band-shaped waterproof material is wound around the mounting groove, and the fixing is performed by adhering the adjacent segment. Water material was connected with butt bolts.

[0003] However, this conventional water stopping method requires a flange and a mounting groove on the periphery of the joint portion of the segment, which complicates the structure and weight of the segment, and complicates the winding operation of the water stopping material. In addition, there is a problem that it is necessary to secure a work space at the construction site, and that this winding operation requires some skill. Moreover, the water-stopping material has a complicated structure, for example, by providing a water-swelling portion made of water-expandable rubber different from the water-stopping material main body at the contact portions on the upper and lower surfaces thereof, and providing a plurality of hollow portions inside the water-stopping material. There was a problem that production was difficult.

Further, the conventional water stopping method of winding a water stopping material has a problem that a gap is formed between the corners of the segments, and water leaks from the gap into the tunnel. For this reason, as means for preventing a decrease in the water stopping effect in the corner portion, for example, in Japanese Patent Application Laid-Open No. 5-52096, the water stopping material is divided into a band-shaped sealing material and a corner sealing material, and the band-shaped sealing material is attached to a flange. After being wound around the groove and fixed by bonding, the band-shaped sealing material was bonded and fixed to the corner of the band-shaped sealing material.

However, this conventional water stopping method requires a band-shaped sealing material and a corner sealing material, which increases the number of parts, and complicates the winding operation of the band-shaped sealing material and the subsequent bonding of the corner sealing material. There is a problem that it takes time and labor, which leads to prolonging the construction period and soaring construction costs. In addition, the conventional waterproofing method of winding the waterproofing material requires that the mounting groove is linear in a plane, and if the mounting groove is curved or bent, stress is applied to the sealing material after bonding. Occurs and the life is shortened, and a polymerized part is generated,
There is a risk that water leaks from the part, and it is not possible to cope with a complicated joint shape.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem and simplifies the structure of the joint between the water-stopping material and the laying element, which can be manufactured at low cost and easily. This improves the water stopping effect, eliminates complicated winding work of the water stopping material and secures a work space at the construction site, makes this kind of work rational and easy, and has a complicated shape laying element. It is an object of the present invention to provide a method for stopping water in an underground laying element and a water stop seal thereof, which can cope with the water stoppage and can prevent a reduction in the water stop effect at the corner of the joint with a simpler configuration.

[0007]

According to a first aspect of the present invention, there is provided a method for stopping water in an underground laying element in which an elastically deformable waterproof seal is disposed between joints of adjacent underground laying elements. A water seal is formed substantially in the same shape as the joint end on the substantially same surface of the underground laying element, and the water seal is disposed between the joints on the substantially same surface of the underground laying element, and a conventional stop is provided. The present invention eliminates the complicated winding work of water material, makes it possible to carry out this kind of work rationally and easily, and can easily cope with the water stoppage of the joint shape of a complicated underground laying element. The invention of claim 2 is
The waterproofing effect is improved as compared with the conventional waterproofing method in which the waterproof seal is disposed on the entire area of the joint end of the underground laying element and the waterproof seal is disposed on a part of the thickness of the joint end. Like that.

According to a third aspect of the present invention, a plurality of seal pieces are provided on the basis of the shape and size of the joint end of the underground laying element, and the seal pieces are connected to assemble the water-stop seal. By fixing the seal to the joint end of the underground laying element, the assembly of the water seal at the construction site and the securing of the work space are eliminated, for example, this is performed at the factory, The assembly and fixing to the underground laying element are separated so that this can be done reasonably and easily. According to a fourth aspect of the present invention, the waterproof seal is constituted by a plurality of seal pieces, and the seal pieces are fixed to the joining ends of the underground laying elements so that the seal pieces are directly connected to the underground laying elements. This is done rationally, for example, by assembling the water seal at the factory and fixing it to the underground laying element consistently at the factory.

According to a fifth aspect of the present invention, there is provided a waterproof seal for an elastically deformable underground laying element disposed between joints of adjacent underground laying elements, wherein the waterproof seal is provided on substantially the same plane as the underground laying element. It is formed substantially in the same shape as the joint end, and the waterproof seal is disposed between the joints on substantially the same surface of the underground laying element, thereby eliminating the complicated winding work of the waterproof material as in the prior art. This makes it possible to perform various kinds of operations rationally and easily, and to easily cope with water stoppage at the joints of complicated underground laying elements. In the invention according to claim 6, the seal width of the water-stop seal is formed to be substantially equal to or greater than the thickness of the joint end of the underground laying element, and the water-stop seal is disposed at a part of the thickness of the joint end. The water stopping effect is improved as compared with the conventional water stopping method.

According to a seventh aspect of the present invention, a locking piece protruding from one side of the watertight seal is provided so as to be engageable with a peripheral edge of a joint end on substantially the same surface of the underground laying element. It is easily and accurately attached to the joint end of the underground laying element, and the retaining piece holds the waterproof seal at the joint end of the underground laying element. The formation of the mounting groove in the part is eliminated, so that the configuration of the underground laying element can be simplified and its size and weight can be reduced. In the invention of claim 8, a convex curved surface is formed on the peripheral surface of the water stop seal, and the curved surface is disposed so as to be able to engage with a joint end of the underground laying element, and when the underground laying element is connected. The elastic deformation of the curved surface is promoted to improve the water stopping effect.

According to a ninth aspect of the present invention, when the adjacent underground laying elements are connected, the curved surface is crushed, the bulging portion is moved in the thickness direction of the underground laying element, and the space between the joints of the underground laying elements is filled. This makes it possible to improve the water stopping effect, prevent the water stopping effect from decreasing at the corners of the joints of the underground laying elements, and eliminate the need for a conventional dedicated corner seal material. According to a tenth aspect of the present invention, the water-stop seal is constituted by a plurality of seal pieces, and these seal pieces are formed corresponding to the respective dimensions of the joint end of the underground laying element. To assemble the water seal and eliminate the assembly of the water seal at the construction site and the securing of the work space.For example, as in a factory, the assembly of the water seal and the underground laying element Isolate the fixation of
This makes it reasonably and easily possible.

An eleventh aspect of the present invention is a modified joint in which an end piece that is more flexible than the seal piece protrudes from an end of the seal piece, for example, protrudes from an end of a reference pipe or a standard pipe. The joint is deformed so as to improve the water stopping effect between the joints. According to a twelfth aspect of the present invention, the seal piece is provided to project from the seal piece, the seal piece is formed to have a higher hardness than the end piece, and the seal piece is provided at the joint end of the underground laying element. They are arranged easily and quickly.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below in which the present invention is applied to water stoppage at a joint of a propulsion pipe which is an underground laying element laid underground when a tunnel is constructed by a propulsion method. 1 to 14, reference numeral 1 denotes a ground pile, 2 denotes a reference pipe which is a propulsion pipe laid accurately and horizontally on the ground 1 at the center of the top end of the tunnel, and a plurality of standard pipes which are propulsion pipes on both sides thereof. The pipe 3 is laid in a substantially ring shape.

In the case of the embodiment, the reference tube 2 has an upper base of about 800 mm, a lower base of about 700 mm, and a height of about 800 mm.
And a hook-shaped joint 4 is protruded from each of the four corners, and a standard pipe 3 is connected to the joint 4 via a joint 5. In the case of the embodiment, the standard pipe 3 is formed in a substantially U-shaped cross section having two sides of about 800 mm and about 700 mm and a height of about 800 mm, and a hook-shaped joint 5 is protruded at four corners thereof. The joint 4 of the reference pipe 2 is connected to the pair of joints 5 on one side, and the joint 5 of the adjacent standard pipe 3 is connected to the pair of joints 5 on the other side. The standard tubes 3 are connected to each other.

The reference pipe 2 and the standard pipe 3 are formed of the same steel pipe and have the same thickness, and are connected in a plurality of similar reference pipes 2 or 3 in the axial direction. Further, synthetic rubber waterproof seals 6 and 7 for the reference pipe 2 or the standard pipe 3 are interposed. These water seals 6,7
Is formed into a cross-sectional shape of the reference pipe 2 or the standard pipe 3 as shown in FIG. 3 and FIG. It is formed into rice grains.

Of these, the water seal 6 for the reference pipe 2 is
The joint portion of the reference pipe 2, that is, the shape of the joint end face is formed in substantially the same shape. This is composed of four seal pieces 8 to 11 that can be bonded to the joint end faces of the four sides of the reference pipe 2,
End pieces 12 to 15 that can be adhered to both end portions of the base member 10.

Each of the seal pieces 8 to 11 is formed in a straight line having substantially the same length as the corresponding four sides of the reference tube 2 and has a cross section of an inner / outer double structure, and has a substantially rice grain shape inside. A seal body 16 made of soft sponge rubber (hardness 40 degrees) is provided, and the surface of the seal body 16 is covered with a skin layer 17 made of rubber (hardness 60 degrees) which is slightly harder than sponge rubber.

Each of the seal pieces 8 to 11 has flat surfaces 8 a to 11 a which can be adhered to the joint end surface of the reference pipe 2 inside thereof, and has a plate-like shape on one side of the flat surfaces 8 a to 11 a, in the embodiment, outside. Is formed integrally with the skin layer 17 so as to be able to engage with the outer surface of the joint of the reference tube 2.
A convex curved surface 8b is provided outside the seal pieces 8 to 11.
11b are formed, and the curved surfaces 8b to 11b are crushed when the reference pipes 2 and 2 are connected, move the bulged portion inward to close the gap between the reference pipes 2 and 2, and 2 It can be formed on the same level as the inner surface.

The end pieces 12 to 15 are formed of soft sponge rubber (having a hardness of 40 degrees) into rice grains having substantially the same shape as the seal pieces 8 to 11. Surfaces 12a to 15a are formed,
On its outside, a curved surface 1 having substantially the same shape as the curved surfaces 8b to 11b
2b to 15b are formed. The curved surface 12b-1
5b is crushed between the joints 4 and 4 when the reference pipes 2 and 2 are connected, and the bulging portion is moved inward so that the base between the joints 4 and 4 excluding the hook portion can be closed.

In the figure, reference numerals 19 and 20 denote seal pieces 9 and 11 respectively.
Notches formed in concave curved surfaces formed at both ends of the seal pieces 8 and 10 and the outer surfaces of the end pieces 12 to 15 can be engaged. In addition, in the figure, 21 is the reference pipe 2
Brackets provided at the four corners of the inner surface on the side of the end portion, connecting bolts 22 between the brackets 21 and 21 of the reference pipes 2 and 2 facing each other.
And tightened with a nut (not shown).

The seal pieces 8 to 11 and the end pieces 12 to 15 are formed into long strips, respectively. And cut to the base length of the joint 4,
The cut pieces are assembled via an adhesive as shown in FIG.

On the other hand, the water stop seal 7 for the standard pipe 3
It is formed in substantially the same shape as the joint of the standard pipe 3, that is, the shape of the joint end face, which is composed of three seal pieces 23 to 25 that can be bonded to the joint end faces on three sides of the standard pipe 3, and the seal piece 2
End pieces 26 to 29 that can be adhered to both ends of 3, 25
And formed.

The seal pieces 23 to 25 are substantially the same as the seal pieces 8 to 11 and are formed in a straight line having substantially the same length as the corresponding three sides of the standard pipe 3 and have a cross section. Has a double inner and outer structure like the seal pieces 8 to 11. That is, the seal pieces 23 to 25 each have a substantially sponge rubber-like (stiffness: 40 degrees) seal body 30 having a substantially rice-grain shape provided on the inner side, and a rubber which is slightly harder than the sponge rubber is provided on the surface of the seal body 30. (Hardness 60 degrees).

The seal pieces 23 to 25 are provided with flat surfaces 23a to 25
a plate-like locking piece 32 is formed integrally with the skin layer 31 so as to protrude integrally with the skin layer 31 on one side of the flat surfaces 23a to 25a, in this embodiment, and can be engaged with the joint portion outer surface of the standard pipe 3. Has been.

On the outer side of the seal pieces 23 to 25, convex curved surfaces 23b to 25b are formed.
25b are crushed when the standard tubes 3 and 3 are connected, move the bulging portion inward, close the standard tubes 3 and 3 as in the case of the reference tube 2 described above, and , 3 on the same level as the inner surface.

The end pieces 26 to 29 are substantially the same as the end pieces 12 to 15, and are made of soft sponge rubber (hardness: 40 degrees), and are made of rice grains having substantially the same shape as the seal pieces 23 to 25. The flat surfaces 26a to 29a which can be engaged with the joint 5 are formed inside, and the curved surfaces 26b to 29b having substantially the same shape as the curved surfaces 8b to 11b are formed outside thereof. The curved surfaces 26b to 29b are connected to the joints 5,5 when the standard pipes 3,3 are connected.
It is crushed in between, and the bulging part is moved inward, so that the base between the joints 5, 5 excluding the hook part can be closed.

Of these, the end pieces 26 and 29 on the open end side of the standard pipe 3 are formed so as to be curved outward in conformity with the shape of the joint 5 so as to be able to adhere to the joint 5. In the figure, 3
Reference numerals 3 and 34 denote concave cutouts formed at both ends of the seal piece 24 so as to be engageable with the outer surfaces of the seal pieces 23 and 25 or the end pieces 27 and 28.

The seal pieces 23 to 25 and the end pieces 26 to 29 are formed into long strips, respectively, and before they are applied, for example, in a factory, the length of the joint end face of the standard pipe 3 to be water-stopped is set. Then, the base length of the joint 5 is cut, and the cut pieces are assembled via an adhesive as shown in FIG.

In addition, reference numeral 35 in the figure denotes brackets provided at four corners on the inner surface on the end side of the standard pipe 3. A connecting bolt 36 is inserted between the brackets 35, 35 of the reference pipes 2, 2 facing each other, and this is connected to a nut. (Not shown). 37 is a secondary lining wall of the tunnel, 38 is a railroad track constructed on the invert portion of the tunnel, and 39 is a railcar.

The water seals thus configured are used to seal the reference pipe 2 and the standard pipe 3 when the seal pieces 8 to 11 and 23 to 25 are joined to their joint ends.
And two types of end pieces 12 to 15 and 26 to 29 to be joined to the joints 4 and 5,
The embodiments 1 and 23 to 25 and the end pieces 12 to 15 and 26 to 29 are each formed in the embodiment to have substantially the same cross-sectional shape, so that the seal piece member and the end piece member can be shared.

That is, the seal pieces 8 to 11 and 2
The 3 to 25 members are formed into an inner / outer double structure by two kinds of synthetic rubbers having different hardnesses, and are manufactured in a long and band shape. Also, end pieces 12 to 15 and 26 to 2
Nine members are made of a soft synthetic rubber alone of the synthetic rubber, and the seal pieces 8 to 11 and 23 to 2 are used.
It is molded separately from the five members, and is manufactured in a long and strip shape. In this case, the seal pieces 8 to 11, 23 to 25
Since the end pieces 12 to 15 and 26 to 29 have a simple cross-sectional shape and do not have a hollow portion as in the related art, they can be easily and uniformly formed.

Each of the above members is molded and manufactured at a factory, and when each of the water seals 6 and 7 is manufactured by using these members, each joint between the reference pipe 2 and the standard pipe 3 to be joined, that is, the reference pipe The shape and dimensions of the joint end faces of the four sides or the three sides of the standard pipe 2 and the standard pipe 3 and the shapes and dimensions of the bases of the joints 4 and 5 are determined by design drawings, actual measurements, and the like. Cut into pieces.

The cut pieces are separately prepared for the reference pipe 2 and the standard pipe 3 and assembled by bonding at the factory.
Among them, the reference pipe water-stop seal 6 has four seal pieces 8 to 11 and four end pieces 12 to 12 as shown in FIG.
The end pieces 12 to 15 are bonded in the same phase to both ends of the seal pieces 8 and 10 corresponding to the upper and lower sides of the reference pipe 2 via an adhesive. After bonding, they form a straight rod of uniform, generally grain-shaped cross-section, except for the locking piece 18.

Next, the notches 1 at both ends of the seal pieces 9, 11 corresponding to the left and right sides of the reference pipe 2 are formed on the curved surfaces 8b, 10b at both ends of the assembly of the seal pieces 8, 10.
9 and 20 are engaged, and these are bonded and fixed via an adhesive. As described above, the above-described series of assembly is a simple operation including cutting and bonding, requires no skill, can be performed easily and quickly, and can obtain uniform quality.

As shown in FIG. 3, the water seal 6 thus assembled maintains its planar assembly state by the rigidity of the synthetic rubber, and its main part is substantially the same as the shape of the joint end of the reference pipe 2. It is formed in the shape of an equilateral trapezoid. That is, the curved surfaces 8b to 15b are exposed on the surface of the water-stop seal 6, and the locking pieces 18 are protrudingly provided around the rear surface.
Reference numeral 8 denotes an isosceles trapezoid that can be fitted to the outer peripheral surface of the joint end of the reference tube 2.

As shown in FIG. 15, the standard pipe waterproof seal 7 includes three seal pieces 23 to 25 and four end pieces 26 to 29, and seals corresponding to upper and lower sides of the standard pipe 3. End pieces 26 to 29 are bonded to both ends of the pieces 23 and 25 via an adhesive in an in-phase state. After bonding, they form a straight rod with a uniform, generally grain-shaped cross section, except for the end pieces 26, 29 and the locking piece 32.

Next, the notches 3 at both ends of the seal piece 24 corresponding to the support pieces of the standard pipe 3 are provided on the curved surfaces 23b and 25b at both ends of the assembly of the seal pieces 23 and 25.
3, 34 are engaged, and these are bonded and fixed via an adhesive. As described above, the above-described series of assembly is a simple operation including cutting and bonding, requires no skill, can be performed easily and quickly, and can obtain uniform quality.

The water stop seal 7 assembled in this way is shown in FIG.
Thus, the substantially planar assembly state is maintained by the rigidity of the synthetic rubber, and the main part is formed in a substantially U-shape substantially the same as the shape of the joint end of the standard tube 3. That is,
Curved surfaces 23b to 29b are exposed on the surface of the water stop seal 7,
Locking pieces 32 protrude around the rear surface, and these locking pieces 32 form a substantially U-shape that can be fitted to the outer peripheral surface of the joint end of the standard pipe 3.

On the other hand, the reference pipe 2 and the standard pipe 3 are propulsion pipes or buried pipes, and do not need to be provided with a flange at a joint end or a mounting groove at a joint end face as in the prior art. Since a special configuration for applying the seals 6 and 7 is not required, the configuration is simple and can be manufactured at low cost.

Next, when the joint between the standard pipe 2 and the standard pipe 3 is to be stopped using the assembled water seals 6, 7, the water seals 6, 7 are removed from the factory before the water stop operation. These are transported to, for example, a starting shaft at a construction site, and they are attached to one end of the reference pipe 2 and the standard pipe 3, in the embodiment, to the front end.

When the water seal 6 is attached to the reference pipe 2, the joints thereof are cleaned, and the joint end face and the outer periphery of the front end of the reference pipe 2 or the flat faces 8 a to 11 a of the water seal 6 are removed. An adhesive is applied to the inner surface or both of the locking pieces 18, and the waterproof seal 6 is fitted to the front end of the reference pipe 2.

When the water seal 7 is attached to the standard pipe 3, the joints thereof are cleaned, and the joint end face and the outer periphery of the front end of the standard pipe 3 or the flat surface 2 of the water seal 7 are cleaned.
An adhesive is applied to 3a to 25a and / or the inner surface of the locking piece 32, and the water seal 7 is fitted to the front end of the standard pipe 3.

In this case, the locking pieces 18 and 32 engage with the outer peripheral surfaces of the reference pipe 2 and the standard pipe 3 to regulate the mounting positions of the water seals 6 and 7. Easy and accurate installation. The locking piece 1
The bonding area between the water seals 6 and 7 and the reference pipes 2 and 3 are increased, and the mounting strength of the water seals 6 and 7 is increased.

The seal pieces 8-11, 23-
25 is formed in a straight line, and locking pieces 18 and 32 are provided on one side thereof in the axial direction, and the hardness of the sealing member is increased by the outer skin layers 17 and 31. Easily and accurately along the straight joints of On the other hand, the end pieces 12 to 15, 26 to
29 has a lower hardness than the seal pieces 8 to 11 and 23 to 25, and does not have the above-mentioned locking pieces 18 and 32, so that it can be easily attached to the flexible and irregularly shaped joints 4 and 5.

As described above, according to the present invention, the water seals 6, 7 previously formed into the flat or substantially planar joint end shapes of the reference pipe 2 and the standard pipe 3 can be used at the construction site. Since it is only necessary to adhere to the joint end of, the complicated work of winding the waterproof seal around the joint as in the past can be eliminated, and this kind of attaching work can be performed easily and quickly,
Uniform quality can be obtained without skill.

After or in parallel with the installation of such water seals 6, 7, a front pipe (not shown) having substantially the same length and the same cross section as the reference pipe 2 is provided at the rear end of the excavator (not shown). ), And one end of a PC steel wire (not shown) is connected to a predetermined position of the tip conduit, and the other end is installed on a reaching shaft side.
(Not shown).

Then, the excavator is driven, and the towing jack is towed to cause the leading pipe to penetrate the ground 1 from the starting shaft side.
The reference pipe 2 to which the water seal 6 is attached is connected to the rear end of the leading pipe, and the driving of the excavator and the towing jack is resumed. In this way, the reference pipe 2 penetrates the ground 1, and when a predetermined amount of the reference pipe 2 has penetrated, the subsequent reference pipe 2 having the water stop seal 6 attached to the rear end of the reference pipe 2 is connected.

FIGS. 9 and 10 show the connection state of the reference pipe 2. FIG. 9 shows a state before the connection bolt 22 is tightened, and FIG. 10 shows a state after the connection bolt 22 is tightened. After the connection bolt 22 is tightened, that is, the reference pipes 2, 2
After the connection, the curved surfaces 8b-11 of the seal pieces 8-11
b is crushed, the bulging portion moves inward and outward to fill the gap or the entire joint end face between the reference pipes 2 and 2, and the outer surface forms the same level as the locking piece 18, and the inner surface is The same level as the inner surface of the reference tube 2 is formed.

Therefore, as compared with the conventional water stopping method in which a part of the joining end surface is joined to stop the water, a larger joining area can be secured, the water stopping effect can be improved, and the water stopping effect at the corner of the joint portion can be improved. There is no need for a conventional corner sealing material which does not cause the drop and prevents the drop. Further, since the periphery of the inner surface of the reference pipe 2 with the water stop seal 6 interposed therebetween is formed on the same plane, when the apparatus is pulled out from the reference pipe 2 in the event of an excavation accident or a failure of the excavation apparatus, for example, This makes it possible to smoothly and easily perform the maintenance and inspection work of the excavator, and to quickly resume the excavation work.

On the other hand, the end seals 12 to 15 are
4 between the bases of the joints 4 and 4 and squashed, and the bulges of the curved surfaces 12b to 15b move inward and outward as in the case of the seal pieces 8 to 11 described above. Fill the entire end face. In this case, the end seals 12 to 15
Is softer than the seal pieces 8 to 11, and is deformed following the shape of the irregularly shaped joint 4, thereby improving the water stopping effect of the portion.

After the reference pipes 2 and 2 have been connected in this way, the driving of the excavator and the towing jack is resumed, the reference pipe 2 penetrates the ground 1, and the reference pipes 2 are successively added, and the preceding reference pipe 2 is added. When the pipe 2 moves to the arrival shaft, a series of laying of the reference pipe 2 ends.

Next, when the standard pipe 3 is laid,
To the rear end of the standard pipe 3 (not shown), a front pipe (not shown) having substantially the same length and the same cross section as the standard pipe 3 or a front pipe connected in a closed shape by connecting the joints 5 and 5 with a frame, P
One end of a C steel wire (not shown) is connected, and this other end is connected to a towing jack (not shown) installed on the reaching shaft side.

Then, the excavator is driven and the towing jack is towed to cause the leading pipe to penetrate the ground 1 from the starting shaft side adjacent to the laid reference pipe 2,
The joints 5 and 5 of the leading pipe are engaged with the joints 4 and 4 of the reference pipe 2.

In this way, when the leading pipe has penetrated a predetermined amount, the standard pipe 3 having the water stop seal 6 attached thereto is connected to the rear end of the leading pipe, and the driving of the excavator and the towing jack is resumed. When the standard pipe 3 has penetrated into the ground 1 and has penetrated a predetermined amount, a standard pipe 3 having a waterproof seal 7 attached to the rear end of the standard pipe 3 is connected.

The connection status of the standard pipe 3 is substantially the same as the connection status of the reference pipe 2 shown in FIGS.
After the tightening of the standard pipes 3, that is, after the connection of the standard pipes 3, 3, the curved surfaces 23b to 25b of the seal pieces 23 to 25 are crushed, and the bulging portion moves to the inside and outside, and the gap between the standard pipes 3, 3 is formed. Alternatively, the entire joint end surface is filled, and the outer surface forms the same level as the locking piece 32, and the inner surface forms the same level as the inner surface of the standard pipe 3.

Therefore, as in the case of the above-described reference pipe 2, a wider joint area can be secured and the water-stopping effect can be improved and the joining effect can be improved, as compared with the conventional water stopping method in which a part of the joining end faces are joined to stop water. It does not cause a reduction in the water stopping effect at the corners of the part, and does not require a conventional corner seal material for preventing the reduction.

Since the inside of the standard pipe 3 around which the water stop seal 7 is inserted is formed on the same plane, for example, when the apparatus is pulled out of the reference pipe 2 in the event of an excavation accident or failure of the excavation apparatus, the Of the excavator can be performed smoothly and easily, and the excavation operation can be quickly resumed.

On the other hand, the end seals 26 to 29
5 between the bases of the joints 5 and 5, the bulges of the curved surfaces 26b to 29b move inward and outward as in the case of the seal pieces 23 to 25 described above. Fill the entire end face. In this case, the end seals 26 to 2
9 is more flexible than the seal pieces 23 to 25,
It deforms following the shape of the irregularly shaped joint 5 to improve the water stopping effect of the part.

After connecting the standard pipes 3 and 3 in this way, the driving of the excavator and the towing jack is resumed, the standard pipes 3 are penetrated into the ground 1, and the standard pipes 3 are sequentially added to each other. When the pipe 3 moves to the arrival shaft, a series of laying of the standard pipe 3 ends.

Then, another standard pipe 3 is placed adjacent to the laid reference pipe 2 from the starting shaft side in the same manner as described above.
And lay them in order. Thereafter, another standard pipe 3 is sequentially laid, and these are laid in a ring shape as shown in FIG. 1. Then, concrete or mortar is filled inside the reference pipe 2 and the standard pipe 3, and between the joints 4 and 5. After the grout material is injected, they are integrally connected and the ground 1 is supported. After that, the ground 1 inside the reference pipe 2 and the standard pipe 3 is excavated, and the secondary lining wall 37 is formed on the inner surface thereof. Construction, the lining wall 37
The track 38 is constructed in the invert part of the above.

In the above-described embodiment, the water seals 6 and 7 assembled in the factory are transported to the construction site and adhered and fixed to the reference pipe 2 and the standard pipe 3. And the standard pipe 3 to the factory,
7 may be adhesively fixed and transported to the construction site. By doing so, it is possible to consistently perform the work from forming, cutting, and assembling the water-sealing seal material to the reference pipe 2 and the standard pipe 3, which can be performed rationally and efficiently. The working environment can be improved, and it is not necessary to secure a working space at the construction site.

In the above-described embodiment, the assembled water-stop seals 6 and 7 are adhered and fixed to the reference pipe 2 and the standard pipe 3, but the cut seal pieces and end pieces are connected to the reference pipe 2 and the standard pipe 3. 3 may be directly adhered and fixed, so that the complexity of assembling the water seals 6 and 7 and the subsequent handling can be eliminated.

[0063]

As described above, according to the first aspect of the present invention, the waterproof seal is formed to have substantially the same shape as the joint end on the substantially same surface of the underground laying element, and the waterproof seal is formed to the underground laying element. Since it is located between the joints on the same plane, the complicated work of winding the waterproof material as in the past can be eliminated, this kind of work can be done reasonably and easily, and the complicated underground laying element It is possible to easily cope with the water stoppage of the joint shape. According to the invention of claim 2, since the water stop seal is arranged in the entire area of the joint end of the underground laying element,
The water stopping effect can be improved as compared with a conventional water stopping method in which a water stopping seal is arranged at a part of the thickness of the joint end.

According to a third aspect of the present invention, a plurality of seal pieces are provided on the basis of the shape and size of the joint end of the underground laying element, and the seal pieces are connected to assemble the watertight seal. Since the seal is fixed to the joint end of the underground laying element, the assembly of the watertight seal at the construction site and the securing of the work space are eliminated. Can be separated and fixed to the underground laying element, and this can be done reasonably and easily. According to a fourth aspect of the present invention, the waterproof seal is constituted by a plurality of seal pieces, and the seal pieces are fixed to the joining ends of the underground laying elements. By fixing it to the joining end of the element, for example, it is possible to consistently perform the fixing to the underground laying element from the assembly of the water stop seal at the factory, and this can be performed rationally.

According to a fifth aspect of the present invention, a waterproof seal is formed substantially in the same shape as a joint end portion of the underground laying element on substantially the same surface, and the waterproof seal is joined to the underground laying element on a substantially same surface of the underground laying element. Since it is located between the sections, it eliminates the conventional complicated work of winding the water-stopping material, making this kind of work rational and easy. Can be easily handled. According to the invention of claim 6, since the seal width of the water stop seal is formed to be substantially equal to or greater than the thickness of the joint end of the underground laying element,
The water stopping effect can be improved as compared with a conventional water stopping method in which a water stopping seal is disposed at a part of the thickness of the joint end.

According to a seventh aspect of the present invention, there is provided a waterproof seal which is provided on one side of the waterproof seal so as to be engageable with a peripheral edge of a joint end of the underground laying element. Can be easily and accurately attached to the joint end of the underground laying element, and the water-stop seal can be held at the joint end of the underground laying element by the locking piece. The formation of the flange and the mounting groove at the joint end is eliminated, and the configuration of the underground laying element can be simplified and its size and weight can be reduced.
The invention according to claim 8 is that, when the underwater laying element is connected to the underwater laying element, a convex curved surface is formed on the peripheral surface of the water stop seal and the curved surface is arranged so as to be engageable with the joining end of the underground laying element. The elastic deformation of the curved surface in is promoted, and the water stopping effect can be improved.

According to a ninth aspect of the present invention, when the adjacent underground laying elements are connected, the curved surface is crushed, the bulging portion is moved in the thickness direction of the underground laying element, and the space between the joints of the underground laying elements is filled. Since it is made possible, there is an effect that the water stopping effect is improved, the water stopping effect at the corner of the joint of the underground laying element is prevented from lowering, and the conventional dedicated corner seal material can be eliminated. Claim 10
The invention is characterized in that the water-stop seal is constituted by a plurality of seal pieces, these seal pieces are formed corresponding to the respective dimensions of the joint end of the underground laying element, and the seal pieces are connected. As a result of assembling the water seal, the assembly of the water seal at the construction site and the securing of its working space are eliminated.For example, this is performed at a factory, and the water seal is assembled and fixed to the underground laying element. And this can be done reasonably and easily.

According to the eleventh aspect of the present invention, since an end piece that is more flexible than the seal piece protrudes from the end of the seal piece, for example, an irregularly shaped end protrudes from the end of the reference pipe or the standard pipe. The joint is deformed following the joint, and the water stopping effect between the joints can be improved. According to a twelfth aspect of the present invention, the locking piece protrudes from the seal piece and the seal piece is formed to be higher in hardness than the end piece. Can be arranged easily and quickly.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a construction state of a tunnel to which the present invention is applied.

FIG. 2 is an enlarged sectional view showing a part of a connected state of a reference pipe and a standard pipe, which are underground laying elements to which the present invention is applied.

FIG. 3 is an enlarged front view showing a reference pipe which is an underground laying element to which the present invention is applied, and a water seal for the reference pipe.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 3;

FIG. 5 is an enlarged sectional view taken along the line BB of FIG. 3;

FIG. 6 is an exploded perspective view of a reference pipe waterproof seal as an underground laying element to which the present invention is applied, and shows an assembled state thereof.

FIG. 7 is an enlarged sectional view of the water seal for reference pipe.

FIG. 8 is an enlarged sectional view taken along line CC of FIG. 3;

FIG. 9 is an enlarged cross-sectional view showing a state of a water stop seal before connection of a reference pipe to which the present invention is applied.

FIG. 10 is an enlarged cross-sectional view showing a state of a water stop seal after connection of a reference pipe to which the present invention is applied.

FIG. 11 is an enlarged front view showing a standard pipe which is an underground laying element to which the present invention is applied, and a waterproof seal for the standard pipe.

FIG. 12 is an enlarged sectional view taken along line DD in FIG. 11;

FIG. 13 is an enlarged sectional view taken along line EE of FIG. 11;

FIG. 14 is an enlarged sectional view taken along line FF of FIG. 11;

FIG. 15 is an exploded perspective view of a standard pipe waterproof seal as an underground laying element to which the present invention is applied, and shows an assembled state thereof.

[Explanation of symbols]

2 Underground laying element (reference pipe) 3 Underground laying element (standard pipe) 6,7 Waterproof seal 8-11 Seal piece 8b-11b Curved surface 12-15 End piece 18,32 Locking piece 23-25 Seal piece 23b-25b Curved surface 26-29 End piece

[Procedure amendment]

[Submission date] February 28, 2001 (2001.2.2
8)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 7

FIG. 8

FIG.

FIG. 13

FIG. 14

FIG. 5

FIG. 6

FIG. 9

FIG. 10

FIG. 11

FIG. 15

Continuation of the front page (72) Inventor Kiyoshi Kuwahara 2-2-2 Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72) Inventor Toshimi Hihara 2-2-2 Yoyogi Shibuya-ku, Tokyo East Inside Japan Railway Company (72) Hiroichi Nakamura, Inventor 2-53-3 Misaki-cho, Chiyoda-ku, Tokyo Inside Tekkoken Construction Co., Ltd. (72) Toshihiro Machinaga 2--5, Misaki-cho, Chiyoda-ku, Tokyo No. 3 Tetsu Ken Construction Co., Ltd. (72) Inventor Kenji Tashiro 1-21-17 Sasazuka, Shibuya-ku, Tokyo Inside Sakura Rubber Co., Ltd. Co., Ltd. F-term (reference) 2D055 BA03 KB04 KB09 LA02

Claims (12)

[Claims] 1. A method of stopping water of an underground laying element in which an elastically deformable waterproof seal is arranged between joints of adjacent underground laying elements, wherein the water stop seal is joined to substantially the same surface of the underground laying element. A method for stopping water in an underground laying element, wherein the waterproof seal is formed between the joints on substantially the same surface of the underground laying element. 2. The method for stopping water in an underground laying element according to claim 1, wherein the water stop seal is disposed over the entire area of the joint end of the underground laying element. 3. A plurality of seal pieces are provided based on the shape and size of the joint end of the underground installation element, the seal pieces are connected to assemble the waterproof seal, and the waterproof seal is installed underground. The method for stopping water from an underground laid element according to claim 1, wherein the underwater laid element is fixed to a joint end of the element. 4. The method for stopping water in an underground installation element according to claim 1, wherein the water stop seal is constituted by a plurality of seal pieces, and the seal piece is fixed to a joint end of the underground installation element. 5. A watertight seal for an elastically deformable underground laying element disposed between joints of adjacent underground laying elements, wherein the watertight seal is substantially equal to a joint end of the underground laying element on substantially the same plane. A watertight seal for an underground laying element, wherein the seal is formed in the same shape and the waterstop seal is disposed between joints on substantially the same surface of the underground laying element. 6. The watertight seal for an underground laying element according to claim 5, wherein the seal width of the watertight seal is formed to be substantially equal to or greater than the thickness of the joint end of the underground laying element. 7. The underground laying element stop according to claim 5, wherein a locking piece which can be engaged with a peripheral edge of a joint end on substantially the same surface of the underground laying element is provided on one side of the water stop seal. Water seal. 8. The underground installation element stop according to claim 5, wherein a convex curved surface is formed on a peripheral surface of the water blocking seal, and the curved surface is arranged so as to be engageable with a joint end of the underground installation element. Water seal. 9. The underground laying element is connected to an adjacent underground laying element, and the curved surface is crushed to move a bulge portion in a thickness direction of the underground laying element so that a space between joints of the underground laying element can be filled. Waterproof seal for the underground laying element according to 8. 10. The watertight seal is constituted by a plurality of seal pieces, these seal pieces are formed corresponding to respective shapes and dimensions of a joint end of the underground laying element, and the seal pieces are connected. The watertight seal for an underground laying element according to claim 5, wherein the watertight seal is assembled by doing so. 11. The seal according to claim 5, wherein an end piece that is more flexible than the seal piece protrudes from an end of the seal piece. 12. The seal according to claim 11, wherein the locking piece is protruded from the seal piece, and the seal piece is formed with a higher hardness than the end piece.