JP3337374B2 - Shell structure of buried tunnel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submerged tunnel buried under the ground or in water, and more particularly to an outer shell structure thereof.

[0002]

2. Description of the Related Art Conventional buried tunnels include those shown in FIGS. In the submerged tunnel of Fig. 2,
Prior to placing concrete 4 between steel outer plate 1 forming the outer surface and steel inner plate 2 forming the inner surface of the tunnel, studs 6 and reinforcing bars 7 are distributed. It has become.

In a submerged tunnel shown in FIG. 3, a stud 6 and a reinforcing bar 7 are distributed inside a steel outer plate 1 forming an outer surface of the tunnel, and then concrete 4 is poured into the tunnel. A tunnel inner surface is formed. The studs 6 are provided to prevent the concrete 4 from slipping and to prevent the steel outer plate 1 and the inner plate 2 from buckling, and the reinforcing bar 7 is provided to shear the concrete 4. It is something that can be done.

[0004]

In the conventional outer shell structure of a submerged tunnel as described above, the man-hours for mounting the studs 6 and the reinforcing bars 7, which are extremely large in number, are increased, and the cost is greatly increased. There is a problem of inviting.

[0005] Accordingly, the present invention provides a method for manufacturing
By providing a multi-chambered reinforcing material for concrete casting, it is possible to efficiently work by eliminating the need for a large number of studs and reinforcing bars that have been attached one by one to conventional outer panels. It is an object of the present invention to provide a submerged tunnel outer shell structure capable of maintaining sufficient strength.

[0006]

In order to solve the above-mentioned problems, a shell structure of a buried tunnel according to a first aspect of the present invention comprises a steel plate forming an outer surface of a buried tunnel and an inner surface of the plate. A steel partition plate mounted by welding standing up to form a large number of chambers, and a steel inner plate mounted by welding to the partition plate so as to cover the multiple chambers, It is characterized by placing concrete in many rooms.

In the above-described submerged tunnel shell structure of the present invention, the number of partition plates provided so as to form a large number of chambers between the outer plate and the inner plate is smaller than that in the case where conventional studs or reinforcing bars are used. In addition to significant reduction in man-hours, the partition plate is provided so as to connect the outer plate and the inner plate, so that significant performance improvement is expected in terms of strength. You.

In addition, if the partition plate is provided with a through hole for communicating the plurality of chambers and allowing the concrete to flow when the concrete is poured, the concrete pouring work is performed. Can be simplified and can contribute to shortening the construction period.

[0009] Further, the partition plate connects a number of steel longitudinal plates arranged at intervals from each other so as to extend in the longitudinal direction of the tunnel, and connects the adjacent longitudinal passage plates to each other. When provided so as to form the large number of chambers with a large number of steel horizontal partition plates attached to the same vertical passing plate and the outer plate by welding, the vertical passing plate in the partition plate is provided. Due to the presence thereof, sufficient longitudinal strength can be obtained, and in combination with the presence of the horizontal partition in the partition plate, strength characteristics suitable for an elongated tunnel can be obtained.

Further, according to a fourth aspect of the present invention, there is provided an outer shell structure of a buried tunnel, a steel outer plate forming an outer surface of the buried tunnel, one end of which is attached to the inner side of the outer plate by welding and joined to each other by welding. And a steel inner plate that is attached to the other ends of these cylindrical members by welding to form the inner surface of the tunnel, and that each of the insides of the multiple cylindrical members is provided. It is characterized by concrete being cast in the room.

As described above, in the reinforcement type in which a multi-chamber structure is formed by a large number of cylindrical bodies connecting the steel outer plate and the inner plate to each other, a tube brought inside the outer plate at the time of constructing a tunnel. Since the bodies can be mass-produced at the factory in advance, the required man-hours at the site are greatly reduced, and the construction of the buried tunnel can be performed with high work efficiency. Further, by connecting the outer plate and the inner plate with each other by the above-mentioned many cylindrical bodies, a structure advantageous in strength can be obtained.

A through hole is formed in the peripheral wall of the cylindrical body so as to allow communication between the chambers inside the large number of cylindrical bodies and allow the concrete to flow when the concrete is poured. In this case, the concrete placement work is simplified and the construction period is expected to be significantly reduced.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a perspective view showing a part of a submerged tunnel shell structure according to a first embodiment of the present invention, which is cut away. FIG. 1B is a perspective view showing a part of a submerged tunnel outer shell structure according to a second embodiment of the present invention, which is cut away.

First, a first embodiment of the present invention will be described. As shown in FIG. 1 (a), a steel outer plate 1 forming an outer surface of a submerged tunnel and a steel outer plate 1 forming an inner surface of the tunnel are provided. A reinforcing structure as a multi-chamber structure is formed between the inner plate 2 and the inner plate 2.

That is, a number of longitudinal steel plates 3 extending in the longitudinal direction of the tunnel are attached to the inside of the outer plate 1 by welding while being spaced apart from each other, and are attached by welding. The longitudinal boards 3 and the outer panel 1 are attached to each other by welding so that the longitudinal boards 3 are connected to each other with an interval therebetween.

In this manner, the longitudinal plate 3 as a partition plate
And a reinforcement structure having a large number of chambers R partitioned by the horizontal partition plate 5 is formed. Then, the inner plate 2 is attached to the vertical passing plate 3 and the horizontal partition plate 5 by welding so as to cover these chambers R.

The concrete 4 is cast into the large number of chambers R formed as described above. However, the concrete 4 is allowed to communicate with each other during the casting of the concrete 4 by allowing the respective chambers R to communicate with each other. Are formed in the vertical passing plate 3 and the horizontal placing plate 5, respectively.

In the submerged tunnel shell structure according to the first embodiment of the present invention as described above, a vertical plate as a partition plate provided so as to form a number of chambers R between the outer plate 1 and the inner plate 2. The number of the passing plate 3 and the horizontal partition plate 5 is smaller than that of the conventional stud 6.
And the number of man-hours is remarkably reduced as compared with the conventional case using the reinforcing bar 7.
In addition to being able to reduce the cost by up to 20%, a significant improvement in strength is expected since the longitudinal plate 3 and the horizontal partition plate 5 connect the outer plate 1 and the inner plate 2. That is, in addition to the action of preventing the concrete from slipping, each action of preventing the buckling of the outer plate 1 and the inner plate 2 and reinforcing the shearing of the poured concrete 4 is performed.

In each room R, through holes for allowing concrete to flow when concrete is poured are provided in the vertical passing plate 3 and the horizontal partition plate 5, so that concrete placing work is simplified. The construction period will be shortened. The concrete casting into each room R is performed by temporarily providing a hole for concrete casting in the outer plate 1 or the inner plate 2, and after the concrete is cast, the hole is closed with a steel plate. Therefore, when concrete is cast separately for each room R,
The above-mentioned through holes need not be provided in the vertical passing plate 3 or the horizontal placing plate 5.

In the present embodiment, a sufficient vertical strength can be obtained particularly by the presence of the vertical passing plate 3 which passes vertically in the longitudinal direction of the tunnel. Characteristics can be obtained.

The tensile force acting on the outer shell of this buried tunnel is
The outer plate 1, the inner plate 2, the vertical plate 3 and the steel plate forming the horizontal partition plate 5 are borne by the steel plate, and the compressive force is borne by the concrete 4, but the shearing force is due to the combined effect of the steel plate and the concrete 4. Will be borne.

Next, a second embodiment of the present invention will be described. As shown in FIG. 1B, also in this embodiment, a steel outer plate 1 forming the outer surface of a submerged tunnel and the same steel plate 1 are used. A reinforcing structure as a multi-chamber structure is formed between the inner plate 2 and the steel inner plate 2 which forms the inner surface of the steel plate.

In the second embodiment, in particular, the steel plate cylindrical body 8 as a square tube having a chamber R inside is composed of the outer plate 1 and the inner plate 2.
And one end of the cylindrical body 8 is attached to the outer plate 1 by welding, and the other end is attached to the inner plate 2 by welding. .

Each tubular body 8 is formed as a square tube by a pair of longitudinal steel plates 8a in the longitudinal direction of the tunnel and a pair of lateral steel plates 8b in the lateral direction, and the adjacent tubular members 8 are welded to each other. Are connected by

[0025] Then, although the interior of the chamber R of each tubular body 8 the concrete 4 is pouring, shown for permitting the flow of the concrete hitting設時concrete communicated between each other chambers R Non-through holes are formed so as to communicate with each other on the peripheral wall of each tubular body 8. In addition, as a shape of the cylindrical body 8, an appropriate shape such as a regular hexagonal cylinder or a cylinder can be adopted in addition to a square cylinder.

In the above-described second embodiment, a multi-chambered reinforcing structure is formed by a large number of cylindrical bodies 8 connecting the outer plate 1 and the inner plate 2 made of steel. Skin 1
Can be mass-produced at the factory in advance.
The required man-hours on site will be greatly reduced, and the construction of the buried tunnel will be performed with high work efficiency. Further, by connecting the outer plate 1 and the inner plate 2 with a large number of cylindrical bodies 8, a structure advantageous in strength can be obtained.

Further, since a through hole for concrete distribution is formed in the peripheral wall of the cylindrical body 8, the concrete casting work is simplified, and a significant reduction in the construction period is expected. The casting of concrete into the interior of each tubular body 8 may be performed individually by temporarily arranging holes for concrete casting on the outer plate 1 or the inner plate 2. Closed with steel plate.

[0028]

As described above in detail, the following effects can be obtained according to the buried tunnel shell structure of the present invention. (1) The number of partition plates provided so as to form a large number of chambers between the outer plate and the inner plate is significantly reduced as compared with the case where conventional studs and reinforcing bars are used, resulting in a large number of man-hours. In addition, since the partition plate is provided so as to connect the outer plate and the inner plate, a significant performance improvement is expected in terms of strength. (2) If the partition plate is provided with through-holes for communicating the large number of chambers with each other, the concrete placing work in the large number of chambers is greatly simplified, which can contribute to shortening the construction period. (3) When the partition plate is provided as a number of longitudinal plates in the longitudinal direction of the tunnel and a number of horizontal separating plates connecting adjacent longitudinal plates, sufficient longitudinal strength is provided by the presence of the longitudinal plates. Is obtained, and the strength characteristics suitable for an elongated tunnel can be obtained in combination with the presence of the horizontal partition. (4) In the reinforcement type in which a multi-chamber structure is formed by a large number of tubular bodies connecting the steel outer plate and the inner plate to each other, the tubular body brought inside the outer plate during tunnel construction must be Since mass production is possible at the factory, the required man-hours on site is greatly reduced, and the construction of the buried tunnel can be performed with high work efficiency. Further, by connecting the outer plate and the inner plate with each other by the above-mentioned many cylindrical bodies, a structure advantageous in strength can be obtained. (5) When a through hole is provided in the peripheral wall of the cylindrical body to allow the concrete to flow by allowing the cylindrical bodies to communicate with each other,
The construction work for concrete in the room inside the tubular body is simplified and the construction period is shortened.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view showing a part of a submerged tunnel outer shell structure according to a first embodiment of the present invention, which is cut away.
(b) is a perspective view showing a part of a submerged tunnel outer shell structure according to a second embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a conventional submerged tunnel shell structure.

FIG. 3 is a perspective view showing another example of the conventional submerged tunnel shell structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 steel outer plate 2 steel inner plate 3 steel vertical passing plate (partition plate) 4 concrete 5 steel horizontal separating plate (partition plate) 6 stud 7 steel bar 8 steel plate cylindrical body 8a steel vertical plate 8b steel Room R made of horizontal plate

Continuation of the front page (72) Inventor Shunzo Okabe 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) References JP-A-7-42181 (JP, A) Akira Mikai 63-108494 (JP, U) JP 5-25997 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29/063-29/077

Claims (5)

(57) [Claims] 1. A steel outer panel forming an outer surface of a submerged tunnel, a steel partition mounted upright and welded to form a plurality of chambers inside the outer panel; A submerged tunnel outer shell structure comprising: a steel inner plate attached to the partition plate by welding so as to cover the chambers; and a concrete poured into the plurality of chambers. 2. The outer shell structure of a buried tunnel according to claim 1, wherein said partition plate has a through-hole for allowing communication between said plurality of chambers and permitting the concrete to flow when said concrete is poured. A submerged tunnel outer shell structure, which is formed in 3. The submerged tunnel shell structure according to claim 1, wherein the partition plate comprises a plurality of steel longitudinal plates arranged at intervals from each other so as to extend in the tunnel longitudinal direction. The plurality of chambers are formed by a plurality of steel horizontal partition plates which are attached to the adjacent vertical through plates and the outer plate by welding so as to connect the adjacent vertical through plates with each other. A submerged tunnel outer shell structure provided in 4. A steel outer plate forming an outer surface of a submerged tunnel, a plurality of steel plate tubular members attached to the inside of the outer plate by welding and joined together by welding, and a plurality of these tubular members. A steel inner plate attached to the other end of the body by welding to form an inner surface of the tunnel, and concrete is cast in each of the chambers inside the plurality of cylindrical bodies. The submerged tunnel outer shell structure. 5. The submerged tunnel shell structure according to claim 4, wherein each of the chambers inside the plurality of cylindrical bodies communicates with each other to allow the concrete to flow when the concrete is poured. A buried tunnel outer shell, wherein a through hole is formed in a peripheral wall of the cylindrical body.