JP2864111B2 - Box-type roof cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-type roof cylinder used as an auxiliary construction method for constructing a crossing underpass under a railway or a road by propelling or towing a box.

[0002]

2. Description of the Related Art In the propulsion method, for example, a steel sheet pile is driven beside an upper traffic such as a railway to construct a starting pit and a reaching pit.
In some cases, a press-fitting machine is installed in the starting pit, and the box-shaped roof cylinder is pressed into the reaching pit with this, thereby forming a roof as a protective work.

FIG. 25 is a front view of the box-shaped roof cylinder 6.
It is a box-shaped cylinder having a substantially square cross-section made of a steel pipe, and a male joint 6a in which hook-shaped constituent members are arranged outward on a side surface, and a female joint 6b arranged inward are continuously formed in the longitudinal direction. The friction cutter 7 made of a flat plate is mounted on the upper surface.

The box-shaped roof cylinder 6 is composed of one unit cylinder.
The joint flanges 6c are formed at the ends as shown in FIG. 26, and the joint flanges 6c are fastened to each other with bolts and nuts 19 to add one piece at a time in the length direction to thereby obtain the required length. Is buried, and joints 6a,
6b.

[0005] Then, when the roof cylinder 6 is advanced and one piece of the unit cylinder comes to the arrival shaft side, the fastening of the joint flange 6c with the bolts and nuts 19 is released to divide the joint flange 6c in the length direction. Lift and remove it horizontally. The press-fitting machine has an extruding mechanism of the cylinder 6 by a jack or the like and an internal excavation mechanism of the cylinder 6 by an auger or the like.

As shown in FIGS. 27 to 29, the cylinders 6 are arranged in a one-letter type (FIG. 27), a gate type (FIG. 28), a box type (FIG. 29) or the like according to an underground structure to be installed later. Selected as appropriate.

[0007]

As described above, the box-shaped roof cylinders 6 are arranged side by side while being engaged with the male joint 6a and the female joint 6b, and are sequentially press-fitted one by one from the starting pit. When it comes out to the destination shaft side, it is removed by one piece of the unit cylindrical body. However, since the male joint 6a and the female joint 6b are engaged over the entire length of the cylindrical body 6 in the longitudinal direction, the arrival shaft is In order to separate and remove the cylinder 6 extruded one by one from the adjacent cylinder, it is necessary to further advance one piece in the length direction one by one in the length direction, and reach that much The width of the pit must be secured.

When the width of the reaching shaft cannot be ensured due to the location conditions, the joint 6b is cut off by gas, which is troublesome and requires re-welding for reuse.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to provide a case in which one piece of the roof cylinder pushed out of the reaching shaft cannot be further advanced by one piece. However, the roof cylinder extruded toward the destination shaft can be moved forward only slightly without cutting the joint.
An object of the present invention is to provide a box-type roof cylinder that can separate pieces and that does not disengage a joint when an adjacent roof cylinder advances.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a box-shaped roof tube having a steel pipe having a substantially rectangular cross-section and connected in parallel through a required number of joints. A pair of outward hook-shaped engaging pieces having a predetermined length protruding at predetermined intervals in the longitudinal direction, and being fitted to the inward hook-shaped engaging pieces as joints on the other connecting side surface. An engaging piece is protruded, and the inward hook type engaging piece and the outward hook type engaging piece are arranged in a staggered plane so that at least a part thereof wraps in a fitted state, or an inward hook type. The engagement piece and the outward hook type engagement piece are arranged so as to wrap for a length that does not disengage even when the adjacent box-shaped roof cylinder is advanced, or the inward hook type engagement. The gist is that a horizontal locking piece connected to the horizontal portion is provided between each horizontal portion of the piece and the outward hook type engagement piece. Than it is.

According to the first aspect of the present invention, the joint formed by the inward hook-type engaging piece and the outward hook-type engaging piece provided on the connecting side surface of the box-shaped roof tubular body has a predetermined length. The roof cylinder is formed at a predetermined interval, so that when the roof cylinder arrives at the pit side, the joint with the adjacent roof cylinder can be made by slightly advancing one piece of the roof cylinder to be removed. Since the mating is released, this is further moved in the lateral direction,
In some cases, it can be separated simply by shifting it vertically. Therefore, even if the width of the reaching shaft cannot be further secured for one piece of the roof cylinder, one piece of the roof cylinder can be taken out without cutting the joint.

In addition, since the inward hook-type engaging piece and the outward hook-type engaging piece are arranged in a staggered plane so that at least a part thereof wraps in the fitted state, one piece of the roof cylinder is used. When separating, it is not necessary to advance the cylindrical body by the length of both engagement pieces, and it is possible to cope with a reaching shaft with no width.

According to the second aspect of the present invention, in addition to the above operation, at least a part of the inward hook type engaging piece and the outward hook type engaging piece are wrapped in the fitted state. However, the wrap length is long enough to ensure that the adjacent box-shaped roof cylinders do not come off even when advanced, so that the fitting between adjacent roof cylinders is released during the propulsion process. And the direction of propulsion can be secured.

According to the third aspect of the present invention, in addition to the above-described operation, the horizontal locking piece restricts the vertical movement over the entire length of the roof cylinder, so that the directionality of propulsion is further improved. . Further, the horizontal locking piece does not hinder the horizontal movement of the roof cylinder, so that it does not hinder one piece of the roof cylinder from being slightly advanced and separated on the reaching shaft side.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view showing a first embodiment of a box-shaped roof cylinder of the present invention, FIG. 2 is a perspective view from one side of the same, and FIG. 3 is a perspective view from the other side. As in the prior art, the basic configuration is a box-shaped roof cylinder having a substantially square section made of steel pipe, and a joint flange 6c is formed at an end.

In the box-shaped roof cylinder 6, a pair of inward hook-shaped engaging pieces 17 having a predetermined length are protruded as joints on one of the connection side surfaces at predetermined intervals in the length direction, and the other connection side surface is provided. A pair of outward hook-type engaging pieces 18 which are fitted to the inward hook-type engaging pieces 17 are provided as joints.

Inward hook type engaging piece 17 and outward hook type engaging piece 18
With at least partly wrapped in the fitted state,
Even when the adjacent box-shaped roof cylinders 6 are advanced, they are arranged in a staggered plane so as to be wrapped by a length that does not allow the fitting to be released.

As an example, when the total length of the box-shaped roof cylinder 6 is 6 m, an inward hook-type engaging piece 17 and an outward hook-type engaging piece 18 are provided.
Are formed to have a length of 1 m, and the inward hook type engaging piece 17 is formed.
And the outward hook-type engaging pieces 18 are protruded at intervals of 1 m, the wrap length of the inward hook-type engaging pieces 17 and the outward hook-type engaging pieces 18 becomes 50 cm. Therefore, if one stroke of the forward movement of the box-shaped roof cylinder 6 is set to 30 cm, even if the adjacent box-shaped roof cylinder 6 advances, the wrapping is performed for 20 cm.

Inward hook type engaging piece 17 and outward hook type engaging piece 18
As shown in FIG. 6, inward hook type engaging pieces 17
And the hook-shaped engaging pieces 18 are directly fixed to the cylindrical body 6 by welding, a method of attaching with the salive rivets 20 as shown in FIG. 7, and a method of fixing with the bolts 21 as shown in FIG.

Next, the usage will be described. FIG. 12 to FIG. 14
Shows the respective steps of the method of constructing an underground structure. As shown in FIG. 12, a retaining stake 2 is cast beside an upper traffic 1 such as a railway, and a starting pit 3 and a reaching pit 4 are constructed. A press-fitting machine 5 having an extruding mechanism using a jack or the like and an internal excavating mechanism for a cylindrical body 6 for a roof using an auger or the like is installed in the starting pit 3.
With this, the roof cylinder 6 is press-fitted toward the reaching shaft 4. In the drawing, reference numeral 7 denotes a friction cutter mounted on the upper surface of the roof cylinder 6.

The roof cylinder 6 is moved from the starting shaft 3 to the reaching shaft 4.
The first one may be penetrated, and then the adjacent ones may be arranged and press-fitted one after the other, and furthermore, the small jacks 12 may be pushed side by side one by one in a parallel state, but they may be arranged side by side as shown in FIG. After being set to the state, the roof can be pushed forward by one stroke at a time, so that all the roof cylinders 6 can be propelled at the same time.

As shown in FIGS. 4, 5, and 9, the box-shaped roof cylinders 6 arranged in parallel in the propulsion process have an inward hook type engaging piece 17 and an outward hook type The engagement piece 18 is partially fitted and connected.

When all the roof cylinders 6 are propelled at the same time, the wrap length of the inward hook-type engaging piece 17 and the outward hook-type engaging piece 18 is equal to that of the adjacent box-shaped roof cylinder 5. Since the length is set to be longer than the length by which one box is advanced, even if only the adjacent box-shaped roof cylinder 6 is advanced, the fitting is not disengaged. The mold roof cylinder 6 moves forward, and the directionality is secured.

Next, as shown in FIG. 13, a reaction wall 8 and an underground structure 9 made of a concrete box are set in the starting pit 3, and a propulsion jack 10 is provided between the reaction wall 8 and the underground structure 9.
And a cutting edge 11 is provided at the tip of the underground structure 9, and a small jack 12 is interposed between the tip of the underground structure 9 and the box-shaped roof cylinder 6.

In the figure, reference numeral 13 denotes a support member for the box-shaped roof cylinder 6;
Are stop members for the friction cutter 7, which are provided on the starting pit 3 side, and on the other hand, a receiving stand 15 is provided on the reaching pit 4 side.

The box-shaped roof cylinders 6 are simultaneously pushed one stroke at a time while the small jack 12 is extended and the underground structure 9 is used as a reaction force while the friction cutter 7 is left.
When all the box-shaped roof cylinders 6 have moved forward, the small jack 12 is contracted, and the propulsion jack 10 is now extended to excavate the underground structure 9. In the figure, reference numeral 16 denotes a strut interposed between the propulsion jack 10 and the underground structure 9.

In this way, while the advance of the box-shaped roof cylinder 6 and the advance of the underground structure 9 are alternately repeated, as shown in FIG. When the minute is completely released, the fastening between the joint flanges 6c by bolts and nuts 19 is released, and the joint flanges 6c are split in the length direction.
As shown in FIG. 10, the engagement between the inward hook-type engaging piece 17 and the outward hook-type engaging piece 18 is released by slightly further advancement.

Next, as shown in FIG. 11, one unit piece of the box-shaped roof cylinder 6 is displaced in the horizontal and horizontal direction as it is, separated, lifted in a horizontal state, and sequentially removed.

When the tip of the underground structure 9 reaches the reaching pit 4, the cutting edge 11 and the like are removed and backfill grouting is performed as appropriate to complete the construction.

The underground structure 9 may be constructed such that a precast concrete box is sequentially suspended in the starting pit 3 and connected thereto, or concrete is cast in the starting pit 3 to a required length. May be added.

As for the method of propelling the underground structure 9, a reaction wall and a center-hole type traction jack are provided on the side of the reaching pit 4, and one end is fixed to the underground structure 9. By pulling a traction member made of steel wire with this traction jack, the underground structure 9 can be pulled in from the reaching pit 4 side.

The above construction method is an example, and the small jack 12
A method in which the underground structure 9 and the box-shaped roof cylinder 6 are simultaneously pushed by the propulsion jack 10 without providing the undercarriage, or the entire undercarriage of the box-shaped roof cylinder 6 reaches the reaching pit 4 before the underground structure 9
The box-type roof cylinder of the present invention can also be used in a construction method for starting propulsion of a roof, or when the box-type roof cylinder 6 is assembled so as to surround the underground structure 9.

FIGS. 15 to 24 show a second embodiment.
In addition to the configuration of the first embodiment described above, an inward hook type engagement piece
Horizontal locking pieces 17a and 18a connected to the horizontal portions are provided between the respective horizontal portions of the hook 17 and the outward hook-shaped engaging pieces 18.

As a result, a horizontal locking member is formed on the connecting side surface of the box-shaped roof cylinder 6 over the entire length in the longitudinal direction, and the inward hook type engaging piece 17 and the outward hook type engaging member are formed. As shown in FIG. 22, the tip of the outward hook-shaped engaging piece 18 (or the inward hook-shaped engaging piece 17) may be a horizontal locking piece 17a (or a horizontal locking piece) even at a portion where there is no fitting with the mating piece 18. 18a), the vertical movement of the adjacent box-shaped roof cylinder 6 is restricted over the entire length, and the vertical direction is further improved.

In the case of the second embodiment, the direction is regulated only in the vertical direction over the entire length, and the regulation in the horizontal direction is the same as in the first embodiment. When one piece unit reaches the reaching shaft 4 and separates and removes it, the box-shaped roof cylinder 6 to be removed is further advanced slightly as shown in FIGS. When the horizontal locking by the engaging piece 17 and the outward hook-shaped engaging piece 18 is released, the hook can be lifted while being shifted laterally.

[0036]

As described above, in the box-shaped roof cylinder according to the present invention, when the roof cylinder reaches the destination shaft, one piece of the roof cylinder to be removed is slightly advanced. Since the fitting of the joint to the adjacent roof cylinder is released only by itself, the joint can be separated simply by further shifting the joint in the horizontal direction, and in some cases in the vertical direction. Therefore, even if the width of the reaching shaft cannot be further secured for one piece of the roof cylinder, one piece of the roof cylinder can be taken out without cutting the joint.

Further, since the inward hook-type engaging piece and the outward hook-type engaging piece are arranged in a staggered plane so that at least a part thereof is wrapped in a fitted state, one piece of the roof cylinder is used. When separating, it is not necessary to advance the cylinder by the length of both engagement pieces, it can correspond to a reaching pit without width, and the wrap length is that the adjacent box-type roof cylinder has advanced Even if the length is maintained so that the fitting does not come off, the fitting between adjacent roof cylinders is not released in the propulsion process, and the directionality of propulsion can be ensured.

When the horizontal locking pieces are provided, the movement in the vertical direction is restricted over the entire length of the roof cylinder, so that the direction of propulsion is further improved. Since the horizontal movement of the cylinder is not hindered, it does not hinder the one-piece roof cylinder from being slightly advanced and separated on the arrival pit side.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a box-shaped roof cylinder according to the present invention.

FIG. 2 is a perspective view from one side showing the first embodiment of the box-shaped roof cylinder of the present invention.

FIG. 3 is a perspective view from the other side showing the first embodiment of the box-shaped roof cylinder of the present invention.

FIG. 4 is a plan view showing the first embodiment of the box-shaped roof cylinder according to the present invention, in a state where they are arranged in parallel.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4, showing a box-type roof cylinder according to the first embodiment of the present invention in a state of being arranged in parallel.

FIG. 6 is a front view showing a first example of a connecting portion which is a main part of the first embodiment of the box-shaped roof cylinder according to the present invention;

FIG. 7 is a front view showing a second example of the connecting portion, which is a main part of the first embodiment of the box-shaped roof cylinder according to the present invention.

FIG. 8 is a front view showing a third example of the connecting portion which is a main part of the first embodiment of the box-shaped roof cylinder according to the present invention.

FIG. 9 is a sectional view taken along the line BB of FIG. 4 showing the box-type roof cylinder according to the first embodiment of the present invention in a state where they are arranged in parallel.

FIG. 10 is a plan view showing the first embodiment of the box-shaped roof cylinder according to the present invention in a state in which one unit piece is separated and advanced from a side-by-side state.

FIG. 11 is a plan view showing the first embodiment of the box-shaped roof cylinder according to the present invention, in which one unit piece is separated from the side-by-side state.

FIG. 12 is a side view showing a first step of the method for constructing an underground structure using the box-shaped roof cylinder according to the present invention.

FIG. 13 is a side view showing a second step of the method for constructing an underground structure using the box-shaped roof cylinder according to the present invention.

FIG. 14 is a side view showing a third step of the method for constructing an underground structure using the box-shaped roof cylinder according to the present invention.

FIG. 15 is a plan view showing a second embodiment of the box-shaped roof cylinder according to the present invention.

FIG. 16 is a perspective view from one side showing a second embodiment of the box-shaped roof cylinder of the present invention.

FIG. 17 is a perspective view showing the second embodiment of the box-shaped roof cylinder according to the present invention, as viewed from the other side.

FIG. 18 is a plan view showing a second embodiment of the box-shaped roof cylinder according to the present invention, in a state where they are arranged in parallel.

FIG. 19 is a sectional view taken along the line AA of FIG. 18 showing a box-type roof tubular body according to a second embodiment of the present invention in a state where they are arranged in parallel.

FIG. 20 is a front view showing a connecting portion which is a main part of a second embodiment of the box-shaped roof cylinder according to the present invention.

FIG. 21 is a cross-sectional view taken along the line BB of FIG. 18 showing a box-shaped roof cylinder according to a second embodiment of the present invention, in a state where the cylinders are arranged side by side.

FIG. 22 is a front view showing another portion of the connecting portion, which is a main portion of the second embodiment of the box-shaped roof cylinder according to the present invention.

FIG. 23 is a plan view showing a second embodiment of the box-shaped roof cylinder according to the present invention in a state in which one unit piece has been separated and advanced from the side-by-side state.

FIG. 24 is a plan view showing a second embodiment of the box-shaped roof cylinder according to the present invention, in which one unit piece is separated from the side-by-side state.

FIG. 25 is a vertical sectional front view of a conventional box-shaped roof cylinder.

FIG. 26 is a perspective view of a conventional box-shaped roof cylinder.

FIG. 27 is a front view showing a first example of the arrangement of the box-shaped roof cylinders.

FIG. 28 is a front view showing a second example of the arrangement of the box-shaped roof cylinders.

FIG. 29 is a front view showing a third example of the arrangement of the box-shaped roof cylinders.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper traffic 2 ... Soil pile 3 ... Starting pit 4 ... Reaching pit 5 ... Press-fitting machine 6 ... Box-type roof cylinder 6a, 6b ... Joint 6c ... Joint flange 7 ... Friction cutter 8 ... Reaction wall 9 ... Underground structure Object 10 ... Propulsion jack 11 ... Blade 12 ... Small jack 13 ... Support member 14 ... Stopping member 15 ... Receptacle 16 ... Strut 17 ... Inward hook type engaging piece 17a ... Horizontal locking piece 18 ... Outward hook type engaging member Joining piece 18a ... Horizontal locking piece 19 ... Bolt, nut 20 ... Sara rivet 21 ... Bolt

Claims (3)

(57) [Claims] 1. A box-shaped roof tubular body having a substantially rectangular cross-section steel pipe connected in parallel by a required number of joints via a joint, and a pair of inward hook-shaped engaging pieces having a predetermined length as a joint are provided on one connecting side surface. A pair of outward hook-type engaging pieces projecting at predetermined intervals in the length direction, and a pair of outward hook-type engaging pieces that are fitted to the inward hook-type engaging pieces as joints are provided on the other connecting side surface, and the inward hook-type engaging A box-shaped roof tubular body characterized in that the pieces and the outward hook-type engaging pieces are arranged in a staggered plane so that at least a part thereof wraps in a fitted state. 2. An inward hook type engaging piece and an outward hook type engaging piece are arranged so as to be wrapped by a length which does not come off even when an adjacent box-shaped roof cylinder is advanced. Item 4. A box-shaped roof cylinder according to Item 1. 3. The horizontal locking piece according to claim 1, wherein a horizontal locking piece connected to the horizontal portion is provided between each horizontal portion of the inward hook type engaging piece and the outward hook type engaging piece. Box-type roof cylinder.