JP2995285B2 - How to advance the 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 method for advancing a box-type roof cylinder which is used as an auxiliary construction method for constructing a crossing underpass under a railway or a road by propelling or towing the cylinder.

[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. 9 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.
As shown in FIG. 10, a joint flange 6c is formed at the end portion, and the joint flanges 6c are fastened together by bolts and nuts 19 to add one piece at a time in the length direction to thereby obtain a 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. 11 to 13, the cylinders 6 are arranged in a one-letter type (FIG. 11), a gate type (FIG. 12), a box type (FIG. 13) or the like according to an underground structure to be installed later. Selected as appropriate.

[0007]

As described above, the box-type roof cylinders 6 are arranged side by side while being engaged with the male joint 6a and the female joint 6b, and 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.

Further, since both the male joint 6a and the female joint 6b are completely fixed to the steel pipe which is the main body of the cylindrical body 6 by welding, if the width of the reaching pit cannot be sufficiently secured due to location conditions, In order to collect the cylinder 6 in the arrival pit, the joint 6b must be gas-cut and the operation is troublesome. In order to reuse the joint 6, it is necessary to re-weld it, which requires much labor and labor. Become.

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, an object of the present invention is to provide a method for advancing a box-shaped roof cylinder that can be easily separated without cutting a joint, from the roof cylinder that has been extruded to the arrival shaft side.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an inward hook type engaging piece as a joint on one connecting side of a box-shaped roof tubular body having a substantially rectangular cross-section steel pipe in a longitudinal direction. ,
An outward hook-type engaging piece fitted to the inward hook-type engaging piece as a joint is provided on the other connecting side surface in the length direction, and a required number of box-shaped roof cylinders are connected in parallel through the joint. In this case, the inward hook-type engaging piece and the outward hook-type engaging piece are protruded from the box-shaped roof cylinder at a predetermined interval and detachably detachable. The gist of the present invention is that the inward hook-type engaging piece and the outward hook-type engaging piece are advanced by a length which does not come off.

According to the first aspect of the present invention, the joint composed of the inward hook-type engaging piece and the outward hook-type engaging piece provided on the connecting side surface of the box-shaped roof cylinder is detachable. When one piece of the roof cylinder is separated in the arrival pit, the joints can be cut even if the width of the arrival pit cannot be further secured by one piece of the roof cylinder because both engagement pieces can be easily removed. One piece of the roof cylinder can be easily taken out.

According to the second and third aspects of the present invention, in addition to the above-mentioned operation, the removal of the two engaging pieces only requires the loosening of the rivets or bolts, so that the workability is good.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial front view showing a first embodiment of a method for advancing a box-shaped roof cylinder according to the present invention.
As in the prior art, reference numeral 6 in the drawing is a box-shaped roof cylinder having a substantially square section made of steel pipe, and a joint flange is formed at an end.

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

In the first embodiment, as a fixing means for the inward hook-type engaging piece 17 and the outward hook-type engaging piece 18, in the first embodiment, it is fixed from the outside of the connecting side face by a Sara rivet 20, as shown in FIG.

FIG. 2 shows a second embodiment of the fixing means for the inward hook-type engaging piece 17 and the outward hook-type engaging piece 18, which is a bolt.
21 fixed from the inside of the connection side.

Next, the usage will be described. 3 to 5
3 shows each step of the method of constructing an underground structure. As shown in FIG. 3, a retaining stake 2 is placed 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 the roof cylinder 6 using an auger or the like is installed in the starting pit 3. . 7 in the figure
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.
Until the first one penetrates, and then presses the adjacent ones side by side, and then press-fits them one by one with the small jack 12 in a parallel state. It is also possible to push all the roof cylinders 6 simultaneously, so to speak, by pushing one by one one stroke at a time.

Next, as shown in FIG. 4, 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 for the box-shaped roof cylinder 6, and 14
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.

By extending the small jack 12 and pushing the box-shaped roof cylinder 6 one stroke at a time, so-called simultaneously, while leaving the friction cutter 7 with the underground structure 9 as a reaction force,
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 manner, while the advance of the box-shaped roof cylinder 6 and the advance of the underground structure 9 are alternately repeated, one unit piece of the box-shaped roof cylinder 6 is placed in the arrival shaft 4 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.
Loosen the Sara rivets 20 and bolts 21 and engage the hooks 17
And the outward hook-shaped engaging piece 18 is removed from the steel pipe which is the main body of the cylindrical body 6, and the fitting between the adjacent cylindrical bodies 6 is released.

Next, one unit piece of the box-shaped roof cylinder 6 is lifted up in a horizontal state and sequentially removed.

Then, 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 reaching shaft 4 side, and one end of the underground structure 9 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.

In the above-described embodiment, the inward hook-type engaging piece 17 and the outward hook-type engaging piece 18 are provided over the entire length in the length direction of the steel pipe as the main body of the cylinder 6, but the invention is not limited to this. Instead, as shown in FIG. 6, a pair of inward hook type engaging pieces 17 of a predetermined length are protruded at predetermined intervals in the length direction, and the inward hook type engaging A pair of outwardly engaging hook-shaped engaging pieces 18 that fit into the pieces 17 can also be protruded.

In this case, as shown in the figure, an inward hook-shaped engagement piece
At least a part of the outer hook-shaped engaging piece 18 wraps in the fitted state, and the outer hook-shaped engaging piece 18 wraps for a length that does not come off even when the adjacent box-shaped roof cylinder 6 advances. They were arranged in a staggered plane.

In this embodiment, as shown in FIGS. 7 and 8, when the cylinder 6 to be separated from the adjacent cylinder 6 at the arrival shaft 4 is further advanced slightly, the inward hook type engagement is achieved. The engagement between the piece 17 and the outward hook type engaging piece 18 is released, and it is not necessary to remove the inward hook type engaging piece 17 and the outward hook type engaging piece 18, respectively. However, since the inward hook-type engaging piece 17 and the outward hook-type engaging piece 18 are divided into a plurality of pieces, it is not necessary to handle a long object, and work becomes easier.

[0031]

As described above, the box-type roof cylinder according to the present invention comprises the inward hook-type engaging piece and the outward hook-type engaging piece provided on the connecting side surface of the box-type roof cylinder. The joints are detachable, so that when one piece of the roof cylinder is separated in the reaching pit, both engaging pieces can be easily removed, so the width of the reaching pit cannot be further secured by one piece of the roof cylinder. However, one piece of the roof cylinder can be easily taken out without cutting the joint, and no trouble is required when the joint is reused.

Further, since the removal of both engagement pieces only requires the loosening of the rivets or bolts, the workability is good.

[Brief description of the drawings]

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

FIG. 2 is a partial front view showing a second embodiment of the box-shaped roof cylinder according to the present invention.

FIG. 3 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. 4 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. 5 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. 6 is a plan view showing another example of the box-type roof cylinder of the present invention.

FIG. 7 is a plan view showing a state in which the box-type roof cylinders of the present invention are advanced from a state where they are arranged side by side.

FIG. 8 is a plan view showing a state in which one unit piece is separated from a state in which the box-shaped roof cylinders of the present invention are arranged side by side.

FIG. 9 is a longitudinal sectional front view of a conventional box-shaped roof cylinder.

FIG. 10 is a perspective view of a conventional box-shaped roof cylinder.

FIG. 11 is a front view showing a first example of an arrangement state of the box-shaped roof cylinders.

FIG. 12 is a front view showing a second example of the arrangement of the box-type roof cylinders.

FIG. 13 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 ... Destination pit 5 ... Press-fitting machine 6 ... Box-shaped 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 18 ... Outward hook type engaging piece 19 ... Bolt, Nut 20 ... Sara rivet 21 ... Bolt

Claims (3)

(57) [Claims] 1. An inward hook type engaging piece as a joint on one connecting side of a box-shaped roof cylinder having a substantially rectangular cross-section steel pipe as a joint, and the inward hook type engaging as a joint on the other connecting side. When hook-shaped engaging pieces are provided in the longitudinal direction to be fitted to the mating pieces, and when the required number of box-shaped roof cylinders are connected in parallel through joints, these The hook-shaped engaging pieces are detachably protruded from the box-shaped roof cylinder at predetermined intervals and are detachably provided. When the box-shaped roof cylinder advances, the inward hook-shaped engaging piece and the outward hook-shaped A method for advancing a box-type roof cylinder, wherein the engagement piece is advanced by a length that does not disengage. 2. The box-type roof cylinder according to claim 1, wherein the inward hook-type engagement piece and the outward hook-type engagement piece are each detachably attached to the connecting side surface of the box-type roof cylinder by means of salaried rivets. How to advance the body. 3. The box-type roof cylinder according to claim 1, wherein the inward hook-type engagement piece and the outward hook-type engagement piece are each detachably attached to a connecting side surface of the box-type roof cylinder by bolts. Way forward.