JP2010018973A - Steel pipe for pipe roof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel pipe for a pipe roof, which enables the two steel pipes to be connected together at an optional spacing, which enables a reduction in construction cost and the shortening of a construction period by virtue of a reduction in the number of steel pipes for construction, which increases an opening area of a cutting edge for performing a drilling operation by a leading end of the steel pipe in a steel pipe push in operation, because a horizontal member for connecting the two steel pipes together is located in the outer-shape height position of the steel pipe, and which can bring about a high degree of accuracy in pipe jacking construction by virtue of proper workability, upper and lower surfaces with many horizontal places, proper planarity, the hardly loosening the surrounding soil, and high rectilinearity. <P>SOLUTION: This steel pipe for the pipe roof is used for a pipe roof construction method in which the steel pipes are juxtaposed and inserted into natural ground. The two juxtaposed cylindrical steel pipes 1 and 1 are connected in the upper and lower outer-shape height positions of the steel pipes 1 and 1 on opposed inward surface sides 1a by means of horizontal plate bodies 2 and 2; a vertical partition plate 3 is arranged between the upper and lower horizontal plate bodies 2 and 2 in an intermediate portion between the steel pipes 1 and 1; and a male joint 4 or a female joint 5, which is composed of H-shaped steel, is provided on the outward surface sides 1b of the steel pipes 1 and 1 by connecting edges of flanges of them. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a steel pipe for pipe roof used as a pipe roof construction method for constructing underground structures such as underground walls, reinforcing bodies and waterstops.

  As is well known, the pipe roof method has a shallow soil cover, and there is a structure on the top or the outer periphery of the support is bored at a soft geological location, and a steel pipe (pipe) of about 85 to 200 mm is inserted. This is a method of excavating while forming a roof with a row and supporting the pipe with a support at the same time as excavation, and by repeating the work of connecting and propelling the previously buried steel pipe joint and other steel pipe joints Build a pipe roof.

  In other words, a steel pipe provided with a male-female fitting joint over the entire length in the longitudinal direction at a predetermined position on the outer periphery is buried in the ground, and a thrust is generated on the starting side of the steel pipe. The steel pipe is buried in the ground by installing a device, placing a propulsion machine that excavates natural ground at the head and propelling it, and then propelling the excavator by following the steel pipe. Then, another steel pipe is arranged adjacent to the already buried steel pipe, and the operation of connecting and propelling the already buried steel pipe joint and the other steel pipe joint is repeated.

  In this case, when there is a large underground structure such as a tunnel to be constructed, every time a single steel pipe is propelled, a new steel pipe is welded to the rear of the steel pipe and propelled in order to make it appear from the start side to the arrival side. A pipe roof is constructed by burying one steel pipe, and arranging another steel pipe adjacent to the steel pipe and repeating the work of connecting and propelling the joint of the already buried steel pipe and the joint of the other steel pipe. Is building.

By the way, in order to shorten the construction period for constructing the pipe roof, a connecting pipe in which at least two steel pipes are arranged in parallel and connected, and a joint portion is provided over the entire length at a predetermined position on the outer periphery is used. In the following patent document, at least two pipes are propelled in the propulsion work.
Japanese Patent Laid-Open No. 10-18757 Japanese Patent No. 3860143

  In Patent Document 1, as a method for constructing a pipe roof, one reference pipe provided with a joint portion over the entire length at a predetermined position on the outer periphery is embedded by a semi-shield propulsion method at a reference position of the pipe roof to be constructed.

  And, at least two pipes are connected, and a connecting pipe provided with a joint portion over the entire length at a predetermined position on the outer periphery is arranged on the starting side, and a tunnel corresponding to the pipe constituting the connecting pipe is formed at the front end of the connecting pipe. An excavation device for excavation is arranged, and the joint portion of the connecting pipe is engaged with the joint portion provided on the reference pipe, and then thrust is applied to the pipe constituting the connecting pipe and propelled along the reference pipe. Further, the joint portion of the new connecting pipe is engaged with the joint portion of the buried connecting pipe and is then propelled and buried.

  The connecting pipe has a structure in which a steel plate having a preset width dimension and thickness is used as a connecting member, and two steel pipes are welded over the entire length by the steel plate.

  The connecting member may be a structure in which H-shaped steel or other structural steel is used and steel pipes are connected by the steel.

  The excavation device for excavating a steel pipe has a shield body and a tail shield configured to be able to bend each other, and a cutter head for excavating a natural ground is provided at the tip of the shield body, and the tail shield has a predetermined outer peripheral position. The excavator has a connecting portion for connecting to another adjacent excavator, and the excavator is arranged in parallel with the number of steel pipes constituting the connecting pipe and connected to each other via the connecting portion.

  Patent Document 2 is the same as Patent Document 1 in that the steel pipe for pipe roof is integrally connected as an H-shaped steel connecting member between two parallel steel pipes on the opposite surface side. H steel is used for a male joint and a female joint, and a male joint and a female joint, which are H steels, are joined together and steel pipes are arranged in parallel.

  The steel pipes for pipe roofs of Patent Document 1 and Patent Document 2 are obtained by integrally connecting two parallel steel pipes as an H-shaped steel connecting member on the opposite surface side. It can be connected at an arbitrary interval, and when connecting two steel pipes at an arbitrary interval to make a pipe roof by combining multiple rows, the overall required installation width can be adjusted. It has the advantage that it can be the construction quantity.

  In addition, compared to conventional single pipe pipe roofs, a set of connected steel pipes has a wide width, and when a pipe roof is formed by combining multiple rows, the number of constructions is reduced, so the construction cost can be reduced and the construction period can be shortened. .

  And the member which connects two steel pipes by arbitrary intervals can use arbitrary member thickness, and the intensity | strength as needed is acquired.

  However, the steel pipes for pipe roofs of Patent Document 1 and Patent Document 2 are obtained by integrally connecting two cylindrical steel pipes arranged in parallel as a connecting member on the opposite surface side as an H-shaped steel. Projects into the shape of a lens. That is, the H-shaped steel as a connecting member exists as a narrow portion, and the shape of the entire outer periphery is that of a bump.

  In such a shape, workability at the time of excavation promotion is poor, and there is a risk of loosening the surrounding ground.

  Moreover, although the opening of the steel pipe is the excavation surface, when the steel pipe is pushed in, the area is small and the workability is poor for excavation work of the steel pipe.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and to improve the workability when performing excavation / pushing work. It is to provide.

  In order to achieve the above-mentioned object, the present invention is a pipe roof steel pipe used for a pipe roof construction method in which steel pipes are inserted in parallel and placed in a natural ground, and the two parallel cylindrical steel pipes face each other. On the inward surface side, the steel pipe is connected by a horizontal member at the height position of the upper and lower outer shapes, and a vertical partition plate is disposed between the upper and lower horizontal members at an intermediate portion between the steel pipes. The second end of the blade tube fitted to the front end is a shape that continuously surrounds the upper and lower horizontal members and the left and right H steel joints. The gist is that a vertical partition plate corresponding to the vertical partition plate in the middle portion is provided in the center.

  According to the first aspect of the present invention, two steel pipes can be connected at an arbitrary interval. In addition, by connecting two steel pipes at an arbitrary interval, when combining multiple rows into a pipe roof, the total required installation width can be adjusted, so the minimum construction quantity can be achieved. .

  Furthermore, compared to conventional single-pipe pipe roofs, a set of steel pipes to be connected has a wide width, and when a pipe roof is formed by combining multiple rows, the number of constructions is reduced, so the construction cost and construction period are shortened. I can plan.

  Although the member which connects two steel pipes at arbitrary intervals is a horizontal member, it is possible to use a member having an arbitrary thickness, and the strength required can be obtained.

  Further, by arranging a vertical partition plate between the upper and lower horizontal members in the middle part between the steel pipes, the load receiving strength of the horizontal member can be reinforced without relying only on the thickness of the horizontal member. Can be improved.

  In addition to this, the horizontal member that connects the two steel pipes is located at the outer height of the steel pipe, so that when the steel pipe is pushed in, the opening area of the blade edge part that excavates the tip of the steel pipe is widened. Good workability.

  The horizontal member connecting the two steel pipes is positioned at the height of the outer shape of the steel pipe, so that at least the upper and lower surfaces of the outer shape of the steel pipe have many horizontal surfaces, good flatness, and rarely loosen the surrounding ground.

  In the construction where the horizontal member that connects the two steel pipes is at the outer height position of the steel pipe, at least the upper and lower surfaces of the outer shape of the steel pipe have many horizontal surfaces, good flatness, and the connecting steel pipe is used as a protective member. The connection with the steel pipe to connect is good.

  It is an integrated structure of steel pipe, built H steel (optional product) and high slend H steel (market product) members, and has high rigidity.

  As a whole, the rigidity is high and the straightness is also high, so high accuracy is obtained in propulsion construction.

  According to the second aspect of the present invention, the opening of the blade tube fitted to the front end can be secured in a wide area, excavation efficiency is good, one steel pipe is used for entering and exiting workers, and the other steel pipe is used for carrying out sediment. And since it can be constructed as a ventilation hole, workability is good and the construction environment is also good.

  As described above, the pipe roof steel pipe of the present invention can connect two steel pipes at an arbitrary interval, and the number of constructions is reduced, so that the construction cost can be reduced and the construction period can be shortened. The horizontal member that connects the steel pipes is positioned at the outer height of the steel pipe, so that when the steel pipe is pushed in, the opening area of the cutting edge for excavating the tip of the steel pipe is widened, workability is good, and the top and bottom surfaces are In many cases, the flatness is good, the surrounding ground is rarely loosened, and the straightness is high.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view showing an embodiment of a steel pipe for pipe roof according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a plan view of the same, and FIG. 4 is a side view of the same. The cylindrical steel pipes 1 and 1 are connected to each other by horizontal plate bodies 2 and 2 as horizontal members at the upper and lower outer shape height positions of the steel pipes 1 and 1, that is, the outer peripheral vertical top height position, on the opposite inward surface side 1a.

  The upper and lower horizontal plates 2 and 2 are parallel to each other, and the ends thereof abut against the outer periphery of the steel pipes 1 and 1, but the abutting portion may be near the outer periphery upper and lower tops of the steel pipes 1 and 1. That's fine.

  In addition, a vertical partition plate 3 is disposed between the centers of the upper and lower horizontal plate bodies 2 at an intermediate portion between the steel pipes 1 and 1, and the upper and lower horizontal plate bodies 2 and 2 and the partition plate 3 are connected to the steel pipe. An H-shaped connecting member for connecting 1 and 1 to each other is formed.

  Further, a joint 4 as a male joint or a joint 5 as a female joint made of H steel is provided on the outward surface side 1b of the steel pipes 1 and 1 with the flange end edges thereof coupled.

  The joint 4 as the male joint is slightly swung with respect to the joint 5 as the female joint, and the fitting of the male joint 4 and the female joint 5 is performed by inserting the flange of the male joint 4 between the flanges of the female joint 5. Further, the end of the flange of the inserted male joint 4 is close to the web of the female joint 5.

  As another embodiment, the joint 4 and the joint 5 may have the same size without forming them as a male joint or a female joint. In that case, the ends of the flanges are merely overlapped without overlapping each other.

  Production of such pipe roof steel pipes is done with factory processed materials as an integrated structure of steel pipe, built H steel (optional product) and high slend H steel (market product) members, so that it is connected with high precision and has excellent construction accuracy. Bending rigidity can be demonstrated with less material.

  In FIG. 1, reference numeral 6 denotes a cutting edge tube fitted to the front end of a pipe roof steel pipe, which is constituted by a substantially rectangular pipe 7 that continuously surrounds the upper and lower horizontal plate bodies 2, the left and right H steel male joint 4 and female joint 5. In the shape, a vertical partition plate 8 corresponding to the vertical partition plate 3 in the middle portion between the steel pipes 1 and 1 is provided in the center.

  Inclined plates 9 inclined inward of the blade tube 6 are disposed on the left and right sides of the blade tube 6 so as to cover the left and right male joints 4 and female joints 5 of the steel tubes 1 and 1. Further, a plate member 10 extending in parallel with the substantially rectangular tube 7 may be extended to the back of the inclined plate 9 to form a triangular cover.

  The pipe roof steel pipe of the present invention can be mechanically excavated. However, an operator enters the blade tube 6 and the face is excavated manually, and the excavated portion is used to push the pipe roof steel pipe with a propulsion jack or the like. It is something to be promoted.

  When the excavation method at that time is compared with the conventional one, FIG. 8 shows a conventional steel pipe for pipe roof having a female joint 11a in which bowl-shaped members are arranged inwardly, a male joint 11b in which outwardly arranged members and a female joint 5 are arranged. In this case, however, there was a worker in the tip of the steel pipe and excavation, and the excavated soil had to be turned to the back of the steel pipe and discharged outside. (See arrow in Fig. 8)

  On the other hand, the steel pipe for pipe roof according to the present invention can discharge excavated soil from the adjacent steel pipe 1 as shown in FIG.

  FIG. 6 shows a pipe roof constructed by combining steel pipes for pipe roof according to the present invention so that the whole is formed in a square shape. However, the arrangement is not limited to that shown in the figure, and as shown in FIG. Various measures such as rectangular, arc, and dome shape are possible. In FIG. 6, 12 is an underground structure constructed by protecting with a constructed pipe roof.

It is a perspective view which shows one Embodiment of the steel pipe for pipe roofs of this invention. It is a front view which shows one Embodiment of the steel pipe for pipe roofs of this invention. It is a top view which shows one Embodiment of the steel pipe for pipe roofs of this invention. It is a side view which shows one Embodiment of the steel pipe for pipe roofs of this invention. FIG. 2 is a sectional view taken along line AA in FIG. 1. It is a front view which shows an example of arrangement | positioning of the steel pipe for pipe roofs of this invention. It is explanatory drawing which shows the variation of arrangement | positioning of the steel pipe for pipe roofs of this invention. It is a perspective view which shows the excavation of the steel pipe for conventional pipe roofs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Steel pipe 1a ... Opposite inward surface side 1b ... Outward surface side 2 ... Horizontal plate body 3 ... Partition plate 4 ... Male joint 5 ... Female joint 6 ... Cutting edge tube 7 ... Roughly rectangular tube 8 ... Partition plate 9 ... Inclined plate 10 ... Plate 11 ... Steel pipe for conventional pipe roof 11a ... Female joint 11b ... Male joint 12 ... Underground structure

Claims (2)

  A steel pipe for pipe roof that is used in a pipe roof construction method in which steel pipes are inserted in parallel, and the two cylindrical steel pipes that are arranged in parallel are positioned horizontally on the opposite inward side at the vertical height of the steel pipe. In addition, a vertical partition plate is disposed between the upper and lower horizontal members at an intermediate portion between the steel pipes, and a joint made of H steel is provided on the outward surface of the steel pipe with the flange edge thereof coupled. Steel pipe for pipe roof characterized by   The blade tube fitted to the front end has a shape that continuously surrounds the upper and lower horizontal members and the left and right H steel joints, and a vertical partition plate corresponding to the vertical partition plate in the middle part between the steel pipes is provided in the center. The steel pipe for pipe roof according to claim 2.

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