JP2002285548A - Water-sealing structure for joint portion of steel pipe sheet pile, and cylindrical mesh member for use therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing structure for a joint portion of a steel pipe sheet pile, which can prevent leakage and achieves complete water sealing, and to provide a cylindrical mesh member for use in the sealing structure. SOLUTION: The joint portion 10 is constructed by forming a joint pipe 11 on a side surface of one 1 of adjacently-arranged steel pipes 1, 2 of the steel pipe sheet pile, and a joint section steel 12 on a side surface of the other steel pipe 2, combining the joint pipe 11 with the joint section steel 12, and filling an asphalt mixture 14 into a mesh cylinder 13 which is the cylindrically formed mesh member inserted into the joint pipe 11. Thus, asphalt leaking out of the mesh of the mesh cylinder 13 adheres to an inner surface of the joint pipe 11 and an outer surface of the joint section steel 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-shielding structure for a joint of a steel pipe sheet pile for shielding a joint for connecting between adjacent steel pipes of a steel pipe sheet pile, and a tubular mesh member used for the same.

[0002]

2. Description of the Related Art In steel pipe sheet piles in which a plurality of steel pipes are piled up in a row so as to be filled with soil or water, the steel pipes are interconnected between adjacent steel pipes to prevent the formation of a gap. 7 is provided with a joint as shown in an example cross-sectional view.

[0003] In the illustrated joint, a joint pipe 11 'having a slit 11S' on the side surface of one adjacent steel pipe 1 'is welded and fixed and is extended in the longitudinal direction, and the other corresponding steel pipe 2'. A joint shaped steel 12 'having a T-shaped cross section is welded and fixed to the side surface of the joint pipe 11' to extend in the longitudinal direction, and a flange of the joint shaped steel 12 'is inserted into a joint pipe 11' through a slit 11S '. 12F 'is combined so that it is located, and concrete 14' is filled and cast inside the joint pipe 11 'to perform fixation and waterproofing.

[0004]

However, in the joint of the conventional construction as described above, adjacent joints due to a temperature change after solidification of the concrete 14 'filled in the joint pipe 11' or an external force such as an earthquake or uneven settlement of the ground. Due to the relative displacement of the steel pipes 1 ', 2', cracks X are generated in the concrete 14 ', and there is a problem that the water leaks along the cracks X and imperfect water shielding.

Another problem is that when concrete 14 'is filled and poured, the contaminated water of the ready-mixed concrete flows out of the gap between the slits 11S' of the joint pipe 11 '.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a watertight structure for a joint portion of a steel pipe sheet pile capable of preventing water leakage and completely blocking water, and a tubular net member used therefor. With the goal.

[0007]

According to a first aspect of the present invention, there is provided a joint structure for connecting a steel pipe sheet pile between adjacent steel pipes. A tubular female joint member having a mating gap extends along the longitudinal direction of the steel pipe, and an engaging male joint member having an engaging ridge on a side surface of the other opposite steel pipe extends. In the joint portion of the steel pipe sheet pile in which the engaging convex portion of the male joint member is positioned and engaged inside the tubular female joint member through the engagement gap, inside the tubular female joint member, A tubular mesh member formed into a tubular shape by the mesh member is inserted, and a bituminous material such as an asphalt mixture having a predetermined water barrier performance, clay, clay mortar, mortar, or A waterproof material such as concrete is filled, and the tubular mesh member is The water stopping material fit leaking to the outside passes through is characterized by being configured to close contact with the outer surface of the inner surface and the engagement male joint member of the tubular female coupling member.

As a tubular mesh member used for the waterproof structure of the joint portion of the steel pipe sheet pile, a mesh member having a predetermined mesh size is used to form a tubular mesh member along the inner surface of the tubular female joint member and the outer surface of the engaging male joint member. It is characterized by being formed in.

Further, the lower end portion of the tubular mesh member is provided with a mesh-shaped bottom portion having a predetermined mesh.

Further, a seal member made of an elastic material is mounted on a portion of the tubular mesh member corresponding to a narrow portion formed by the tubular female joint member and the engaging male joint member. .

[0011]

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

FIG. 1 is a cross-sectional view of a joint portion to which an example of the structure of a waterproof structure for a joint portion of a steel pipe sheet pile according to the present invention is applied.
FIG. 2 is a sectional view taken along line AA.

The illustrated joint portion 10 is provided with a joint pipe 11 as a tubular female joint member on a side surface of one steel tube 1 of steel tubes 1 and 2 adjacent to a steel pipe sheet pile and engages with a side surface of the other steel tube 2. A joint section steel 12 as a joint member is provided, the joint pipe 11 and the joint section steel 12 are combined, and furthermore, the joint pipe 11 and the joint section steel 12 are stopped inside a mesh tube 13 as a tubular mesh member inserted inside the joint pipe 11. The asphalt mixture 14 as a water material is filled.

The joint pipe 11 is a steel pipe having a predetermined diameter, and is fixed to the side surface of the steel pipe 1 by welding and extends along the longitudinal direction of the steel pipe 1. A slit 1 having a predetermined width as an engagement gap is provided on the side facing the other steel pipe 12.
1S is formed in the longitudinal direction.

The joint section steel 12 is a T-section steel having a T-shaped cross section. The joint section steel 12 is fixed to the side surface of the steel pipe 2 by welding at the tip of a web 12W and extends along the longitudinal direction of the steel pipe 2. .

Then, the web 12W of the joint section steel 12 is fitted into the slit 11S of the joint pipe 11 with a margin,
A flange 12F as an engaging ridge of the joint shaped steel 12 is in an assembled state positioned inside the joint pipe 11,
Tip of flange 12F of joint shape steel 12 and joint pipe 11
Between the inner surface of the joint 12 and the side surface of the web 12W of the joint shaped steel 12 and the inner end surface of the slit 11S of the joint pipe 11.

As shown in a perspective view of an example of the net cylinder 13 in FIG. 3, at least the upper end of the net cylinder 13 is formed by a mesh having a predetermined mesh size which can obtain an appropriate amount of leakage in relation to the viscosity of the asphalt mixture 14 at the time of filling. Are formed in an open cylindrical shape. The texture (opening) is set so that the asphalt of the asphalt mixture 14 to be filled leaks appropriately.
It is set in consideration of the viscosity at the time of filling, and as an example, when using asphalt having a specific gravity of 1.5 to 1.6 at normal temperature, a good result can be obtained by setting the mesh size to 2 mm x 2 mm. Was.

The circumferential length (length in the circumferential direction) of the mesh cylinder 13 is such that when the mesh tube 13 is inserted into the joint pipe 11, the inner circumferential surface of the insertion space (that is, the inner surface of the joint pipe 11 and the joint shape steel) is formed. 12 (the outer surface of the flange 12F) and is formed seamlessly so that the opening ratio does not change in the circumferential direction so that there is no difference in the leakage amount of asphalt depending on parts. Is preferred.

As shown in FIG. 2, the length of the mesh tube 13 is set so that the lower end reaches the water-impermeable layer 4 below the soft water-permeable layer 3 such as a silt layer. The lower end is opened so that the asphalt mixture 14 filled therein can come into direct contact with the water-impermeable layer. 11 can be easily inserted.

The asphalt mixture 14 fills the inside of the mesh tube 13 and leaks a predetermined amount from its joint, adheres tightly to the inner surface of the joint space, and stops water from leaking. That is, the asphalt mixture 14 is filled into the mesh tube 13 in a state of being heated and having a predetermined viscosity fluidity. At this time, the asphalt leaks from the mesh of the mesh tube 13 and the inner surface of the joint pipe 11 And the outer surface of the joint shaped steel 12).
In a narrow portion between the joint pipe 11 and the joint steel 12, the net 13 prevents the asphalt mixture 14 from flowing out, and retains the shape.

Here, the net forming the net tube 13 has a strength to withstand the asphalt filling pressure, and a cloth woven with fibers of a predetermined diameter at a predetermined mesh size, a non-woven fabric having an equivalent opening ratio, Furthermore, many holes may be mechanically formed in the resin sheet. As a material of the fiber in the case of a fiber woven cloth, for example, polyester, nylon, polypropylene, aramid, etc. can be considered, but when exposed to a poor environment for a long time, polyethylene naphthalate fiber or aramid fiber is preferable. In addition, by applying a resin coating such as a melamine resin, an acrylic resin, or an SBR resin to the fiber, the work of inserting the net tube 13 into the joint pipe 11 is facilitated and the workability of filling the asphalt is improved. In addition, by using the fluffy fibers around, the amount of asphalt leakage can be suppressed even when the mesh size is coarse (the opening is large).

Thus, the joint 1 constructed as described above
In the case of 0, the asphalt mixture 14 as a water-stopping material can completely block water by being in close contact with the inner surface of the joint pipe 11 and the outer surface of the joint shape steel 12, and also has an external force such as a temperature change, an earthquake, and uneven settlement of the ground. As a result, even if relative displacement occurs in the steel pipes 1 and 2, this can be allowed without causing cracks due to the viscosity of the asphalt to prevent water leakage. Net cylinder 13
In the narrow portion formed between the joint pipe 11 and the joint section steel 12 where the asphalt mixture 14 is exposed, the shape of the asphalt mixture 14 is maintained and protected.

FIG. 4 is a cross-sectional view of a configuration example in which the present invention is applied to a joint having a configuration different from the above configuration example. In the joint portion 10 ′ in this configuration example, a pair of L-shaped sectional steel members 15 </ b> A are welded and fixed to the side surfaces of the steel pipe 1 so as to face each other, and the inner surface and the side surfaces of the steel pipe 1 are continuous in the longitudinal direction of the steel pipe 1. A rectangular tube portion 15 as a tubular female joint member having a rectangular cross-sectional shape is formed between the side surface of the steel pipe 1 in the square tube portion 15 and the flange 12F of the joint shaped steel 12 in the same manner as in the above configuration example. Is filled with an asphalt mixture 14 therein.

FIG. 5 shows a further different joint configuration.
The joint steel pipes 16 having the slits 16S on the opposite side surfaces of the two are welded and fixed, and the outer end edges 16A are fitted into the other joint steel pipes 16 through the slits 16S to be in a mutually assembled state. 10 "is a configuration example in which the present application is applied to a space between the inner surface of the joint steel tube 16 and the outer surface of the other joint steel tube 16 and the space between the inner surface of the joint steel tube 16 and the inner surface of the other joint steel tube 16. A net tube 13 is inserted into each space and an asphalt mixture 14 is filled therein.
0 ″ indicates that the slit 16S of each joint steel pipe 16 has an engagement gap,
The outer edge 16A constitutes the engaging ridge.

FIG. 6 is a cross-sectional view in which a different configuration example of the net cylinder is applied to the same joint as in FIG. Illustrated net cylinder 13 '
Is provided with a seal 17 as a seal member formed of an elastic material such as rubber which is continuous in a longitudinal direction (a direction in which the narrow portion extends) in a portion corresponding to the narrow portion of the joint portion 10. This allows the seal 17 to prevent the asphalt mixture 14 from flowing out of the narrow portion, and to close the narrow portion in a water-tight manner to more completely block water.

Although the above configuration example uses an asphalt mixture as a water-stopping material, the water-stopping material is not limited to this, and any other bituminous material having a predetermined water-blocking performance can be used. , Clay, clay mortar, mortar, concrete or the like can be changed as appropriate.

[0027]

As described above, according to the waterproof structure of the joint portion of the steel pipe sheet pile according to the present invention, the tubular mesh member formed into a tubular shape by the mesh member is inserted inside the tubular female joint member. In addition, the inside of the tubular mesh member is filled with a bituminous material such as an asphalt mixture having a predetermined water-blocking performance, and a waterproof material such as clay, clay mortar, mortar, or concrete. The inner surface of the tubular female joint member and the engaging male joint are configured such that the water-stopping material that passes through the eyelet and leaks to the outside thereof is in close contact with the inner surface of the tubular female joint member and the outer surface of the engaging male joint member. The waterproof material close to the outer surface of the member can completely block water, and even if the adjacent steel pipes are relatively displaced by external force such as temperature change, earthquake or uneven settlement of the ground, the viscosity of the waterproof material is Allows this without cracking It is possible to completely prevent the leakage Te. The tubular net member retains and protects the shape of the water-stopping material at a narrow portion formed between the tubular female joint member and the engaging male coupling member where the water-stopping material is exposed.

Further, as a tubular mesh member used in the waterproof structure of the joint portion of the steel pipe sheet pile, a mesh member having a predetermined mesh is formed into a tubular shape along the inner surface of the tubular female joint member and the outer surface of the engaging male joint member. By doing so, it is possible to appropriately leak the water-stopping material according to the setting of the eye contact and to make it tightly adhere to the inner surface of the tubular female joint member and the outer surface of the engaging male joint member. Leakage of the water stopping material from the narrow portion between the joint members can be suppressed, and the shape of the water stopping material filled inside can be retained and protected.

Since the lower end of the tubular mesh member has a mesh-like bottom portion with a predetermined mesh, the rigidity of the bottom portion facilitates insertion of the tubular mesh member into the tubular female joint member.

Further, a seal member made of an elastic material is attached to a portion corresponding to a narrow portion formed by the tubular female joint member and the engaging male joint member of the tubular mesh member, so that the seal member is narrow. In addition to preventing outflow of the water stoppage material in the part, the narrow part can be closed up in a watertight manner to more completely block water.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a joint portion to which a configuration example of a waterproof structure for a joint portion of a steel pipe sheet pile according to the present invention is applied.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a conceptual perspective view of an example of a net tube.

FIG. 4 is a cross-sectional view of a configuration example in which the present application is applied to a joint having a different configuration.

FIG. 5 is a cross-sectional view of a configuration example in which the present application is applied to a joint having a different configuration.

FIG. 6 is a cross-sectional view of a joint portion to which a different configuration example of a net cylinder is applied.

FIG. 7 is a cross-sectional view of a joint as a conventional example.

[Explanation of symbols]

 1, 2 steel pipe 10, 10 ', 10 "joint (joint) 11 joint pipe (tubular female joint member) 11S slit (engagement gap) 12 joint shape steel (engagement male joint member) 12F flange (engagement ridge) Part) 13 net tube (tubular net member) 14 asphalt mixture (water blocking material) 17 seal (seal member)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tatsuka Waki 1-45-93 Futamatagawa, Asahi-ku, Yokohama-shi, Kanagawa F-term in World Engineering Co., Ltd. 2D018 BA15 2D049 EA01 EA02 FB03 FB14 FC02 FC03 FD04 2D054 AC15

Claims (5)

[Claims] 1. A joint for connecting between adjacent steel pipes of a steel pipe sheet pile, wherein a tubular joint female member having an engagement gap on a side surface of one of the steel pipes extends along a longitudinal direction of the steel pipe. An engaging male joint member having an engaging ridge on the side surface of the other opposed steel pipe is extended, and the engaging ridge of the engaging male joint member is connected to the tubular female joint via the engaging gap. In the joint portion of the steel pipe sheet pile positioned inside the member and brought into an engaged state, a tubular mesh member formed into a tubular shape by a mesh member is inserted into the tubular female joint member, and The inside of the mesh member is filled with a waterproof material having a predetermined water-blocking performance,
The water stopping material that passes through the mesh of the tubular mesh member and leaks outside thereof is configured to be in close contact with the inner surface of the tubular female joint member and the outer surface of the engaging male joint member. Water-blocking structure for joints of steel sheet piles. 2. The waterproof structure according to claim 1, wherein the water-stopping material is a bituminous material such as an asphalt mixture, clay, clay mortar, mortar, or concrete. 3. The steel pipe according to claim 1, wherein said mesh member is formed in a tubular shape along the inner surface of said tubular female joint member and the outer surface of said engaging male joint member. Cylindrical mesh member used for waterproofing structure of sheet joint. 4. The tubular mesh member according to claim 3, wherein a lower end portion of the tubular mesh member has a predetermined mesh-like bottom portion. 5. A seal member made of an elastic material is mounted on a portion corresponding to a narrow portion formed by said tubular female joint member and said engaging male joint member. The tubular mesh member as described in the above.