JPH06307182A - Circular pipe for pipe roof - Google Patents

Abstract

PURPOSE:To make it possible to form a pipe roof economically and efficiently. CONSTITUTION:A circular pipe 1 capable of being manufactured easily with high degree of accuracy as a pipe 1 is used in the case a pipe roof P having the same width as that of an upper floor section (f) of a planned underground construction F is formed by making the force-fit and burying of the pipe 1 formed of a linear flat plate 2 mounted on the upper surface thereof in a detachable manner in a parallel state in the ground. Excavation devices such as a screw auger, etc., are inserted into the circular pipe 1, and the force-fit and construction of the circular pipe 1 is smoothly made while excavating the overall ground on the opening end side of the circular pipe 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is preliminarily press-fitted and buried at a position corresponding to the upper floor of an underground structure before the underground structure is built under a railway track or under a road. The present invention relates to a circular pipe for a pipe roof.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 7, in order to construct an underground structure for forming a passage or the like in the ground below a road in a direction intersecting with the road, After excavating vertical shafts B and C on both sides of the road A, a large number of steel rectangular pipes 21 each having a strip plate 22 placed on the upper surface thereof
A pipe having a width substantially equal to the width of the upper floor portion by press-fitting in a parallel state into a portion corresponding to the upper floor portion cross-sectional position of the planned underground structure in the underground between the wells B and C as shown in FIG. By forming the roof P and then advancing the underground structure F while excavating the ground in front while the front end face of the upper floor of the underground structure F is in contact with the rear end face of the pipe roof P. , The pipe roof P and the underground structure F are replaced.

[0003]

However, since the pipe 21 forming the pipe roof P is a pipe having a rectangular cross section, it is difficult and expensive to manufacture, and the pipe 21 between the shafts B and C is not only expensive. When laying in the ground, an excavator such as a screw auger is inserted into the inside of the excavator to excavate and remove soil in front of the excavator with the excavator, and the tool is press-fitted, but the excavator is formed in a front circular shape. Therefore, it is not possible to excavate and remove the soil on the four corners side of the rectangular pipe 21, which is heavy when the rectangular pipe 21 is removed and collected in the vertical shaft C.
There was a problem that it took a lot of manpower to remove the sediment. An object of the present invention is to provide a circular pipe for a pipe roof that can solve such problems.

[0004]

In order to achieve the above object, a circular pipe for pipe roof according to the present invention is a strip-shaped flat plate having a width substantially equal to the diameter of the circular pipe main body on the outer peripheral ridge of the circular pipe main body. The plate has a structure in which the plate is detachably mounted over the entire length of the circular pipe.

[0005]

All the pipes that make up the pipe roof are circular pipes on which strip-shaped flat plates are detachably mounted on the outer peripheral ridge, so that the structure is simple and the cost is low. Not only can the construction cost be reduced, but also a large number of circular pipes having the same diameter can be easily prepared, and a highly accurate pipe roof can be formed. Furthermore, not only can excavation tools such as a front circular screw auger be stably inserted and supported in the circular pipe, but also the excavation of the front ground and the excavated earth and sand over the entire cross-sectional area of the circular pipe can be supported by the excavation tool. It is possible to eliminate them, and press-fit the circular pipe smoothly, improving the efficiency of pipe roof construction.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a circular pipe main body made of a steel pipe having a constant diameter and a length. The center of the lower surface of the strip-shaped flat plate 2 made of a steel plate is placed, and the proper position of the strip-shaped flat plate 2 is detachably attached to the circular pipe main body 1 by bolts 3. Further, engagement ridges 4 and 5 having L-shaped cross sections are fixed to the outer peripheral surfaces on both sides of the circular pipe main body 1 in the lengthwise direction over substantially the entire length.

Reference numeral 6 denotes a blade body in which a rear end portion of the circular pipe main body 1 is detachably fitted and fixed to a front end opening portion of the circular pipe main body 1, which is a short pipe having the same diameter as that of the circular pipe main body 1. Is formed on the blade portion 6a that is sharpened toward the tip, and the gate-shaped plate mount 7 is fixed to the upper surface. The mounting base 7 has a lateral width substantially equal to the width of the strip-shaped flat plate 2 and an upper surface formed on a mounting surface 7a (shown in FIG. 2) at the front end of the strip-shaped flat plate 2 for mounting. The surface 7a is formed to be approximately equal to the height of the upper edge of the circular pipe main body 1. Further, the front end of the mounting surface 7a is raised by one step to form the receiving step surface 7b of the front end surface of the band-shaped flat plate 2.

In order to form the pipe roof P having the same width as the upper floor portion f of the underground structure F in the ground by the circular pipe main body 1 constructed as described above, first, as shown in FIG. After excavating the vertical shafts B and C with the length interval for constructing the object F, a plurality of circular pipe main bodies 1 on which the strip-shaped flat plate 2 is placed are compatible. The pipe roof P as shown in FIG. 5 is formed by horizontally press-fitting and embedding in a laterally juxtaposed state at the cross-sectional position of the upper floor portion f of the structure F.

The length of the circular pipe main body 1 is approximately equal to or slightly wider than the wall thickness of the upper floor portion f of the underground structure F, and the length is long when the underground structure F to be constructed is long. Is formed into a constant size by dividing its length into a plurality of parts. Therefore, in such a divided pipe, when a plurality of circular pipe main bodies 1 are press-fitted while being connected in series, only the foremost circular pipe main body 1 has its front end as shown in FIGS. 1 and 2. Blade body 6 having the mount 7
It is to be attached to other circular pipe main body 1
As shown in FIG. 3, a blade having no blade body 6 is used.

In order to press the circular pipe main body 1 into the ground from one vertical shaft B toward the other vertical shaft C, a screw auger (not shown) is provided in the circular pipe main body 1 having the blade body 6 attached to the front end thereof. No.) is inserted, and the strip-shaped flat plate 2 is temporarily fixed to the circular pipe main body 1 with bolts 3, while the front end of the strip-shaped flat plate 2 is attached to the mount 7 by bolts 8 (shown in FIG. 1) or by welding. Fix it.

In this state, the circular pipe main body 1 is propelled and pressed into the ground while excavating the ground in front by a screw auger, and the excavated earth and sand is removed rearward. After press-fitting the circular pipe main body 1 which is the foremost portion, the front end of the next circular pipe main body 1 is butted to the rear end of the circular pipe main body 1 and connected by welding or the like, and placed on the circular pipe main body 1. The leading end of the strip-shaped flat plate 2 is fixed to the rear end of the strip-shaped flat plate 2 on the circular pipe main body 1 which has been press-fitted by welding or the like, and then press-fitted. A screw auger of a certain length is also inserted into the circular pipe main body 1, and the tip of the screw auger is connected to the screw auger to excavate and remove the ground.

Thus, the frontmost circular pipe main body 1 is
A blade body 6 for excavating the front ground is attached to its front end, and the strip-shaped flat plate 2 is fixed on the outer peripheral ridge of the pipe main body 1,
The succeeding circular pipe main body 1 has the strip-shaped flat plate plate 2 mounted thereon fixed by bolts 3 and the front end thereof is integrally fixed to the rear end of the strip-shaped flat plate plate 2 on the preceding circular pipe main body 1. The pipes connected in a straight line are buried between the compatible shafts B and C by making the state and press-fitting sequentially.

Further, the circular pipe main body 1 is sequentially press-fitted and embedded in the same manner as described above while engaging the engaging projections 4 and 5 adjacent to the side of the already buried circular pipe main body 1. By repeating this, a pipe roof P having the same width as the upper floor portion f of the planned underground structure is formed between the shafts B and C. At this time, when the frontmost circular pipe main body 1 reaches the other shaft C side, the blade body 6 having the mounting base 7 is removed from the front end thereof, and the blade body 6 is attached to one shaft B.
The pipe roof P is formed while being transferred to the side and used again for press fitting of the circular pipe main body 1.

When the pipe roof P is formed between the compatible shafts B and C, the underground structure F is disposed on one of the shafts B and the front end face of the upper floor portion f thereof is brought into contact with the rear end face of the pipe roof P. A worker enters the circular pipe main body 1 into the circular pipe main body 1 to remove it from the circular pipe main body 1 while detaching the bolts 3 that temporarily contact each other and temporarily fix the circular pipe main body 1 and the strip-shaped flat plate 2 to each other. The rear ends of the two rows of belt-shaped flat plate plates are fixed at appropriate positions on the shaft B by appropriate fixing means 9. In addition,
A blade mouth 10 for excavating the ground on the lower surface side of the pipe roof P is attached to the front end of the opening of the underground structure F. The strip-shaped flat plate 2 does not necessarily have to be fixed to the circular pipe main body 1.

In this state, a plurality of jacks 1 are provided between the reaction force supporting member 11 installed on the shaft B and the rear end face of the underground structure F.
When 2 and 12 are intervened, and then the jacks 12 and 12 are extended, the underground structure F is advanced by a certain length while excavating the front ground by the blade edge 10, and the pipe roof P and the other vertical shaft C are also advanced by this advance. Pushed to the side. At this time, the strip-shaped flat plate 2 is left in the ground to prevent the upper ground from moving, and the pipe roof P and the underground structure F advance along the lower surface of these strip-shaped flat plates 2.

Further, the front ground surrounded by the blade opening 10 is excavated by an appropriate excavator and discharged to the vertical shaft B side together with the earth and sand excavated by the blade opening 10, while the other vertical shaft C is provided.
The circular pipe main body 1 extruded to the side is sequentially removed. When the underground structure F is propelled for a fixed length, the reaction force support member 11 is fixed at a position advanced by a fixed length, and the underground structure F and the pipe roof P are integrally pushed while excavating the front ground again. The underground structure F is buried and constructed in a state where the pipe roof P and the underground structure F are replaced by repeating the work. When the underground structure F is long, it may be divided in the lengthwise direction as shown in FIG. 4, and each divided portion may be sequentially advanced. Further, as the means for advancing, other than the propulsion force by the jacks 12 and 12, an appropriate towing means using a wire rope or the like from the other vertical shaft C side may be used.

[0017]

As described above, according to the circular pipe for pipe roof of the present invention, a strip-shaped flat plate having a diameter substantially equal to the diameter of the circular pipe main body is formed on the outer peripheral ridge of the circular pipe main body. Since it is detachably mounted over the entire length, not only the structure can be formed inexpensively and the construction cost of the pipe roof can be reduced, but also a large number of circular pipes of the same diameter, The pipe roof can be easily prepared and an accurate pipe roof can be formed.

Further, a front circular excavating tool such as a screw auger can be stably inserted and supported in the circular pipe, and the excavating tool excavates the front ground and excavates earth and sand over the entire cross-sectional area of the circular pipe. The removal of the circular pipe can be performed reliably, the circular pipe can be easily handled when it is removed and collected, the labor for removing the soil and sand can be saved, and the construction efficiency of the pipe roof can be improved. Further, the circular pipe has a shorter circumference than the rectangular pipe, has less resistance to press-fitting to the ground, and can be press-fitted for a long distance with the same reaction force.

[Brief description of drawings]

FIG. 1 is a simplified perspective view of a circular pipe fitted with a blade body,

FIG. 2 is a simplified perspective view showing a state where the belt-shaped flat plate is removed,

FIG. 3 is a simplified perspective view of a circular pipe without a blade body;

FIG. 4 is a simplified vertical sectional side view showing a construction state of an underground structure,

FIG. 5 is a simplified vertical sectional front view of the pipe roof,

FIG. 6 is a partially enlarged vertical front view of FIG.

FIG. 7 is a construction explanatory view of an underground structure using a conventional pipe roof,

FIG. 8 is a simplified vertical sectional front view of the pipe roof.

[Explanation of symbols]

 1 Mainly circular pipe 2 Strip flat plate 3 Bolt 6 Blade body 7 Mounting base

Claims (1)

[Claims] 1. A strip-shaped flat plate having a diameter substantially equal to that of the circular pipe main body is detachably mounted on the outer peripheral ridge of the circular pipe main body over the entire length of the circular pipe main body. Round pipe for pipe roof.