JPH0959985A - Strut for lagging and laying method of buried pipe by using strut thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut for a lagging simplifying operation and improving efficiency thereof and the laying method of a buried pipe by using the strut at the time of the taking-in operation of the buried pipe. SOLUTION: In struts for laggings oppositely installed at regular intervals along the inner wall of an excavated ditch, hanging sections are mounted at the top sections of the struts 1 and wear plates 3 at specified places at upper stages and lower stages in the vertical direction of the struts, waling support materials 4 are set up at the lower-half places of the wear plates 3, and cradles 6 for braces vertically held by hooked engaging tools 6a are fitted at upper-half places. Brace bases 7 rotatable in the horizontal direction by shafts 8 and the braces 9 are installed to the cradles 6, and the braces 9 stretched among the bases of the opposed struts 1 are rotated and retreated or restored on the waling support materials 4 at the time of the taking-in of a buried pipe. Accordingly, the taking-in operation of the buried pipe is simplified and efficiency thereof is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support for a sheet pile used for excavating a groove when laying a buried pipe such as a gas pipe, a water / sewer pipe, an electric wire and a telephone cable, and a laying of a buried pipe using this strut. Regarding the method.

[0002]

2. Description of the Related Art Much of the laying work for buried pipes is usually carried out by the open-cut construction method. A typical conventional construction method is, for example, placing sheet piles on both sides of a groove excavated to the pipe burying depth. , The bellows are applied horizontally along it, and the gaps between the facing bellows in the groove are supported by cutting beams to prevent the sheet pile from collapsing due to earth pressure, and the excavation proceeds in the extension direction of the buried pipe. There is a way to do it.

However, in these methods, in order to prevent the sheet pile from collapsing at the time of laying work by hanging operation of the buried pipe which is carried out after the excavation of the groove, at least the operator enters the groove and There is a problem in ensuring safety because it is necessary to attach and detach the upper and lower tiering members and the beams. In order to solve such problems and further improve work efficiency, various support materials and groove excavation methods that have made work as mechanical as possible have been developed.

As an example of a construction method capable of efficiently and safely carrying out the operation of suspending the buried pipe in the excavation groove and the work of attaching and detaching the cutting beam for supporting the bellows raising member, Japanese Patent Application No. 7-10459.
There are earth retaining method and earth retaining structure using the sheet pile described in No. 6.

In this construction method, as shown in FIG. 8, striking sheet pile struts 25 are provided along the inner wall of the excavation groove at regular intervals so as to face each other. A horizontally expandable cut beam 26a is erected on the support pillar, and the bellows member 27 is attached between the pillars on the same side of the excavation groove at the same position as the cut beam 26a, and between the excavation groove and the bellow member 27. It is a trench excavation method in which the plurality of arranged sheet piles 28 prevent the sheet piles from falling due to earth pressure.

When the buried pipe is laid in the excavation groove in this way, first, the support pillar 29 is added to the top of the strut 25 for the hitting sheet pile, the support pillar 29 is attached, the pipe is taken up to the position of the cross beam 26a on the upper side, and then the support pillar 29 is added. Another cutting beam 26c is attached between them, the load of the cutting beam 26a on the upper stage side is added to this, and the beam is taken up by the supporting beam between the columns 26c, and the cutting beam 26a is removed to take the pipe downward. Next, the upper-side cutting beam 26a is restored to a predetermined position so that the load of the lower-side cutting beam 26b is changed to the upper-side cutting beam 26a.
Then, the lower beam 26b is removed and the pipe is laid at a predetermined position in the groove.

[0007]

[Patent Document 1] Japanese Patent Application No. 7-104
According to the technique described in the specification of No. 596, in order to facilitate the retraction of the cutting beam when the buried pipe is taken in, as shown in FIG. 9A, the base end side of the cutting beam 26 is hooked horizontally and vertically. 2 which rotate respectively through the plate 30, that is, orthogonal to each other
Book rotation shafts 31 and 32 are provided. Configured like this,
While the cut beam 26 is attached to the hook plate 30, the cut beam 26 is easily retracted to the upper surface of the bellows raising member 27 by rotating the cut beam 26 by rotating shafts 31 and 32, respectively, as shown in FIGS. Can be made.

By the way, according to this technique, when the cutting beam is retracted, the cutting beam has to be rotated twice by the rotating shafts 31 and 32, and a notch is formed in the strut 25 for the supporting sheet pile, so that the structure is complicated and There was a problem that the jig cost was also high, and the loading work and operation were complicated.

The present invention solves the above-mentioned problems and enables a safe and smooth excavation of a buried groove without the risk of collapsing an excavation wall, and a strut for a sheet pile and a strut for the strut for improving the efficiency of pipe intake work. To provide a method for laying a buried pipe.

[0010]

Means for Solving the Problems A strut for a baling sheet pile and a method for laying a buried pipe using the strut according to the present invention are as follows.
It is as (1) to (4).

(1) The strut for the pile sheet pile of the present invention is provided along the inner wall of the excavation groove so as to be opposed to each other at a constant interval, and the interval which is opposed to each other is kept constant by the expandable slicing girder. In a strut for a batting sheet pile that prevents collapse of the excavation groove by attaching a bellows member that horizontally supports the sheet piles arranged on the inner wall of the strut, at the top of the strut, a hook portion that extends outward of the excavation groove and Attaching the anti-raising support material and the support plate of the girder to the upper and lower predetermined positions of the column in the vertical direction, and attaching the anti-raising support material having a box-shaped cross section in the horizontal direction to the lower half position of the receiving plate. A pedestal of a girder suspended vertically from the upper surface of the receiving plate by a hook-shaped locking member and vertically held is provided on the angling support member, and the receiving surface of the pedestal can be horizontally rotated by a rotating shaft. When mounting the buried girder base and taking in the buried pipe, It is characterized in that the cutting beam bridged between the bases of the supporting columns is angulated and pivotally retracted on the support material to facilitate the taking-in work.

As described above, the cutting beam is attached to the cutting beam base which can be rotated in the horizontal direction by the rotating shaft, and when the buried pipe is taken in, the cutting beam is angulated about the rotating shaft and placed on the support material. By rotating and retracting, the work of taking in the buried pipe can be simplified and made more efficient.

As the column, a corrugated steel sheet pile having a mountain-shaped projection at the center of its cross section and formed so that the projection and the projections at both joint ends are in the same plane can be used. . Further, grooved steel or grooved steel sheet pile may be used.

When the former corrugated steel sheet pile is used as a column, the anti-belly support member and the cut beam receiving plate are fixed and supported by the three projecting portions of the steel sheet pile. The support plate can be made thin, and the projecting part of the center part stably transmits the pressing force from the cutting beam and the pressing force and pulling force due to the earth pressure from the abdomen uplifting to the support post. Can be supported.

In the above description, the pedestal of the cut beam is raised and suspended on the upper surface of the support plate on the support member by a locking tool. However, due to the arrangement of the cut beam and the support member, the belly support is raised. It may be locked or suspended at the bottom of the material. Since the pedestal of this cutting beam has a structure in which it is suspended by a hook-shaped locking tool, it can be attached and detached at any time if necessary.

(2) Further, in the strut for the reciprocating sheet pile of the above item (1), a plate member is fixedly attached to the front surface of the steel sheet pile at the upper end of the strut and added to form an insertion support portion of the strut. In this way, by adding the pillars at appropriate times, connecting the pillars to the upper part of the pillars, and bridging the beams across the pillars, the pillars are always supported at two of three points even when the pipe is taken in.
Therefore, the pillar can be stably supported, and the pillar and the sheet pile can be prevented from falling down.

(3) Further, in the strut for the reciprocating sheet pile of the above item (1) or (2), a shaft rod for lower beam cutting beam rotation, a shaft rod for upper beam cutting beam rotation, and a supporting bearing tube at the outermost periphery from the center. It is concentrically provided, a turning handle is attached to the upper part of each turning rod, and a turning arm having a notch is projected from the vicinity of the center to the tip at a predetermined position of the lower part to form a cutting beam turning jig. The rotating jig is inserted between the steel sheet pile and the receiving plate of the cutting beam, and the notches of the rotating arms are engaged with the protruding pieces provided on the upper and lower cutting beams, respectively. , The pivot rod is rotated to raise the cut beam and pivotally retract onto the support member.

This girder turning jig allows the turning and retreat of the girder to be operated remotely, that is, from the ground by means of a shaft rod. By facilitating the operation of the girder in this way, the safety of the work for taking in the buried pipe is ensured. Efficiency and efficiency.

(4) The method of laying a buried pipe according to the present invention is a method of laying a buried pipe by excavating a buried groove using a strut for a supporting sheet pile. Each of which is provided with a support plate for the waving support and a support plate for the truss, and a support member for the support beam for the horizontal direction at the lower half position of the support plate, and a support plate for the cutting beam held vertically on the support member for the waving at the upper half position. A beam girder base that can be rotated horizontally through the table is attached, and the hook portion provided at the top of the pillar is locked to the shoulder of the excavation groove excavated to a predetermined width, and along the inner wall of the groove. Struts are placed, and expandable and retractable beams are inserted between the upper and lower shelves of the opposite columns to hold the columns at a fixed interval, and then the abdominal support of the upper and lower columns attached to the columns is supported. Sequentially connect the waving material to the timber, raise the sheet pile along the wading material, and further After installing the embedded pipe to the cutting beam position on the upper stage side, attach another cutting beam between the supporting columns and add the load of the cutting beam on the upper stage side to the cutting beam between the columns. Deposit, then retract the upper beam and retract it on the supporting material by raising the belly up to take the buried pipe to the lower beam position, then restore the upper beam to the predetermined position. Then, the load of the lower-side cutting beam is stored in the upper-side cutting beam, and then the lower-side cutting beam is similarly retracted to abdomen and pivotally retracted onto the support material, and the buried pipe is placed at a predetermined position in the groove. It is a method of laying a buried pipe using a strut for a strike sheet pile, which is characterized by being laid.

As described above, according to the present laying method, the pillars are further added to the tops of the pillars, the pillars are attached, and the beams are bridged between the pillars. Therefore, it is possible to stably support the support column and prevent the support column and the sheet pile from falling down.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a strut for a pile sheet pile of the present invention will be described below with reference to the drawings. In the present embodiment, a case is shown in which the corrugated steel sheet pile is used as a strut, FIG. 1 is a side view showing the entire structure of the strut for the strut sheet pile, and FIG. 2 is a steel sheet pile of the strut for the strut sheet sheet and a belly support member. And FIG. 3 is a plan view showing the mounting relationship between the steel sheet pile, the upright support member and the cutting beam receiving plate.

In the sheet pile support 1 of the present invention, rectangular support plates 3 are attached to predetermined positions in the upper and lower longitudinal directions of the steel sheet pile 2 as the support. As for the position of attaching the receiving plate 3, the receiving plate on the upper stage side is about 1/5 of the shoulder portion with respect to the total depth of the excavation groove, and the receiving plate on the lower stage side is similarly 3 from the shoulder portion.
The position of about / 5 is an appropriate position for the structure to stably receive the earth pressure on the wall surface.

At the lower half position of the receiving plate 3, a bellows supporting member 4 having a box-shaped cross section is attached in the horizontal direction, and a bellows member 5 is inserted and fixed in the box-shaped inside. Further, at the upper half position, a hook-shaped locking tool 6 is provided on the belly support member 4.
There is provided a pedestal 6 which is a girder suspended from the upper surface of the receiving plate 3 by a and held vertically.

On the receiving surface of the pedestal 6 which is held vertically,
A beam girder base 7 that can be horizontally rotated by a rotating shaft 8 is attached, and a girder that is bridged between the base girder 7 and a strut for a sheet pile installed opposite to the inner wall of the excavation groove. The beam 9 is attached. This girder 9 is composed of, for example, a water pressure or hydraulic jack capable of expanding and contracting, maintains a constant interval between supporting columns, and at the time of taking in a buried pipe,
By raising the cut beam 9 around the rotary shaft 8 and horizontally retreating it on the support member 4, the work for taking in the buried pipe is simplified and made more efficient.

Here, the pedestal 6 of the cut beam is a hook-shaped locking tool 6a.
Since it has a structure of being suspended on the upper surface of the receiving plate 3, it can be attached and detached at any time as needed. Further, in the above description, the pedestal 6 of the cut beam is raised and the support plate 3 on the support member 4 is raised.
Although the suspension 6a is suspended on the upper surface, it may be suspended and suspended at the lower portion of the swelling support 4 due to the arrangement of the truss and the swelling support.

FIG. 4 shows a girder rotating jig 10 for rotatably operating the girder 9 from a remote position, that is, from the ground by means of a shaft rod. A rotating shaft rod 12 and a supporting bearing tube 13 are concentrically provided at the outermost periphery, and rotating handles 11a and 12a are provided on the upper portions of the rotating shaft rods.
The rotating arm 11 is provided with notches 11c and 12c from the center to the tip at a predetermined position on the lower part.
It is configured by projecting b and 12b.

The rotating jig 10 is inserted between the steel sheet pile 2 and the beam receiving plate 3 shown in FIG.
Protrusion piece 11d in which cutout portion 11c of 1b is provided on cut beam 9
, And the pivot rod 11 is rotated to raise the cut beam 9 to be swept up and retracted onto the support member 4. This beam turning jig 1
0 makes it possible to install a plurality of shafts in a confined place by making the operating shaft rods 11 and 12 of each stage concentric, thereby making it possible to achieve a safer and more efficient operation for taking in a buried pipe.

Further, as shown in FIG. 5 and FIG. 1, the hook portion 14 extending to the outer side of the excavation groove is provided on the top of the steel sheet pile 2.
In addition, a plate member is fixedly installed on the front surface of the steel sheet pile 2 at the upper end portion of the strut 1 for the supporting sheet pile, and is added to the insertion supporting portion 15 of the strut 16.
To form A beam girder base 17 is provided on the top of the additional support pillar 16.
Similarly, a cross beam 9 is bridged between the reciprocal support pillars provided opposite to each other, and the support pillar 1 is always supported by two of the three cut beams even when the pipe is taken in. It is possible to support the column and prevent the column and the sheet pile from falling down.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment, a method of laying a buried pipe using a strut 1 for a hitting sheet pile will be described with reference to the drawings.

First, as shown in FIG. 6 (a), a digging groove 21 having a predetermined width and a predetermined burial depth is excavated at a position for laying a buried pipe, and then as shown in FIG. 6 (b). Then, the strut 1 for strut sheet piles is erected, the hook portion 14 provided at the top of the strut is locked to the shoulder portion 22 of the excavation groove, and the strut 1 for strut sheet piles is arranged along the inner wall of the groove.

Continuing, as shown in FIG. 3 (c), expandable and retractable beams 9a and 9b are inserted between the upper and lower beam beam bases 7a and 7b facing each other, and the strut 1 for the hitting sheet pile is installed. Hold the intervals at regular intervals. In this case, the cross beam bases 7a and 7b on the side of one strut 1 (for example, the strut on the left side in the drawing) of the strut 1 for the reciprocating sheet piles facing each other are supported by the rotary shaft 8 as shown in FIG. It is configured to be rotatable in the horizontal direction with respect to the other, and the cross beam bases 7a, 7b on the side of the other pillar 1 on the right side in the figure.
Are fixed to the receiving plate 3.

Further, the upper and lower bellows raising support members 4a, 4b
The bellows members 5a and 5b are sequentially connected to each other, and the sheet pile 23 is set up along the bellow members 5a and 5b.

Next, as shown in FIG. 7 (a), first, prior to taking in the buried pipe, the support 16 is inserted and fixed to the insertion support portion 15 of the additional support of the top of the strut 1 for the strut sheet pile, and the embedded pipe 24 is continued. Is taken up to the position of the cross beam 9a on the upper stage side.

Subsequently, as shown in FIG. 7 (b), another cutting beam 9c is attached between the supporting columns 16 to add the load of the upper cutting beam 9a to the cutting beam 9c between the supporting columns, and then the upper beam. Side cut beam 9a is retracted, and it is swung up and retracted onto upper stage side upright support 4a, and embedded pipe 24 is taken in to lower stage side cut beam 9b position.

Here, if the cutting beam turning jig 10 shown in FIG. 3 and FIG. 4 is used to raise the cutting beam 9a and turn it back on the support member 4a, even in a narrow place. The cutting beam can be rotated and retracted and the operation can be restored remotely, which makes it possible to improve the safety and efficiency of the operation of taking in the buried pipe.

Next, as shown in FIG. 7 (c), the upper-side cut beam 9a is restored to the original position by rotation, and the lower-side cut beam 9a is restored.
The load of b is stored in the upper girder 9a, the lower girder 9b is subsequently retracted in the same manner as described above, and the lower girder is raised and pivoted and retracted onto the support member 4b. Lay it in place.

As described above, according to the present invention, when the buried pipe is taken in, the movement of the cutting beam for supporting the strut for the sheet pile is simply moved in a simple operation and evacuated or retracted on the side wall side waving support member. It can be restored, work can be simplified, and excavation and laying of buried pipes can be performed safely and smoothly.

[0038]

As described above, according to the present invention, one end of the cutting beam is laid through the rotary shaft when the buried groove is excavated and the buried pipe is laid by holding the supporting sheet piles at a constant interval by the cutting beam. The gantry can be stored in the same plane as the stanchion and the bellows by simply abutting the other end against the stanchion. Can be used to the maximum. In addition, when taking in the buried pipe, a strut is added to the upper end of the strut, and the strut is bridged between the strut and the replenishment strut that is provided facing each other by connecting the strut, so that the strut is always supported by two points of the strut, The pillar can be stably supported, and safety can be ensured.

In addition, the conventional structure in which the girder bridging between the columns is detached / restored each time the buried pipe is taken in, or rotated and retracted by two rotating shafts is changed to one horizontal shaft by one operation. Simplification of work by adopting a structure that can be rotated in any direction so that it can be rotated and retracted or restored.
In addition to improving efficiency, it is possible to lay buried pipes in a safe environment.

When the cutting beam is rotated, a cutting beam rotating jig having concentric upper and lower beam cutting beam rods is used by inserting it between the steel sheet pile and the receiving plate of the cutting beam. As a result, the traverse operation of the beam can be performed from a remote location, that is, from the ground, and the operation of incorporating the buried pipe can be made safer and more efficient.

[Brief description of drawings]

FIG. 1 is a side view showing an example of the overall structure of a strut for a reciprocating sheet pile of the present invention.

FIG. 2 is a perspective view showing the details of mounting the steel sheet pile, the bellows raising support member, and the cut beam receiving plate of the sheet pile strut of the present invention.

FIG. 3 is a plan view showing a mounting relationship between the steel sheet pile, the bellows raising support member, and the truss support plate of the present invention.

FIG. 4 is a side view showing a partial cross section of a cutting beam rotating jig for remotely rotating the cutting beam, and a plan view showing a rotating arm.

FIG. 5 is a perspective view showing details of a support column, a support column for the support column, and an insertion support portion.

6 (a), (b) and (c) are schematic cross-sectional views for explaining a procedure for excavating a buried trench.

7 (a), (b) and (c) are schematic cross-sectional views for explaining a procedure for laying a buried pipe.

FIG. 8 is a perspective view showing an example of a conventional trench excavation method.

9 (a), (b), and (c) are perspective views showing a retraction operation sequence of a cutting beam by two conventional operations.

[Explanation of symbols]

 1,25 Supporting sheet piles 2 Steel sheet piles 2a, 2b Projections of steel sheet piles 3 Receiving plates 4 Raising support materials 5,27 Raising materials 6 Cut beam pedestals 6a Hook-like locking tools 7,17 Cut beams Base 8, 31, 32 Rotating shaft 9, 9a, 9b, 9c, 26a, 26b, 26c Cut beam 10 Cut beam rotating jig 11 Lower beam beam rotating rod 12 Upper beam beam rotating rod 11a, 12a Rotating handle 11b, 12b Rotating arm 11c, 12c Cut portion 11d Projecting piece 13 Supporting bearing tube 14 Hooking portion 15 Inserting supporting portion 16,29 Joint support column 21 Excavation groove 22 Excavation groove shoulder 23, 28 Sheet pile 24 Embedded Tube 30 hook plate

Front page continued (72) Inventor Nobuaki Iida 1188-82, Oshiimachi, Midori-ku, Chiba (72) Inventor Kuniyoshi Takahashi 2-3-6 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Tsunehiko Hayashi 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Koji Yoshigai 2-3-6 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Minji Iimura 1-21-2 Reisen, Hodogaya-ku, Yokohama

Claims (4)

[Claims] Claims: 1. Along the inner wall of an excavation trench, which are provided to face each other at regular intervals, the stretchable truss keeps the opposing intervals constant, and the sheet piles arranged on the inner wall of the trench are horizontally aligned. In a strut for a reed sheet pile that is attached with a bellows member to prevent the excavation groove from collapsing, a hooking portion extending to the outer side of the excavation groove at the top of the strut, and a predetermined position in the upper and lower stages of the longitudinal direction of the strut. Attach the abdominal support material and the truss beam support plate to the lower half position of the abutment plate horizontally in the cross-section box-shaped abutment support material, the upper half position of the abutment support material hook-shaped A pedestal of a girder suspended from the upper surface of the receiving plate by a locking tool and vertically held is provided, and a pedestal girder base that is horizontally rotatable by a rotation shaft is attached to the receiving surface of the pedestal,
When the buried pipe is taken in, for the bait sheet pile, it is easy to take in the work by pulling up the sash beams that have been bridged between the bases of the columns facing each other in the excavation groove, and revolving and retracting it on the support material. Prop. 2. A strut for a sheet pile according to claim 1, wherein a plate member is fixedly attached to the front surface of the upper end of the strut to add and support the insertion support portion of the strut. 3. A shaft bar for lower beam cutting beam rotation, a shaft rod for upper beam cutting beam rotation from the center, a support bearing tube is concentrically provided on the outermost periphery, and a rotation handle is attached to the upper part of each rotation shaft rod. At a predetermined position on the lower part, a turning arm having a notch is projected from near the center to the tip to form a cutting beam turning jig, and the turning jig is inserted between the support post and the cutting beam receiving plate. Wearing, the notches of the respective rotating arms are engaged with the protrusions provided on the upper and lower cutting beams, and the rotating shaft rod is rotated to raise the cutting beams and rotate on the support member. The strut for a pile sheet pile according to claim 1 or 2, which is retractable. 4. A method of excavating a buried groove by using a strut for a supporting sheet pile and laying a buried pipe in the method. A plate is attached, and it can be rotated horizontally through the support member that is horizontally raised in the lower half position of the receiving plate and the pedestal of the cross beam that is vertically held on the support member that is in the upper half position. Was attached to the pedestal, and the shoulder of the excavation groove that was excavated to a predetermined width was locked with the hooking part provided at the top of the support pillar, and the support pillar was placed along the inner wall of the groove. Stretchable girders are inserted between the upper and lower girder receiving plates to hold the columns at regular intervals, and then the abdomen uplifting members of the upper and lower stages attached to the columns are sequentially connected to the abdomen uprights. Set up the sheet pile along the belly-raising material, and then add it to the top of the column to install the column. First, the embedded pipe is taken in to the upper beam side beam position, and then another beam is added between the columns to add the load of the upper beam side and store it in the beam between the columns, then the upper beam side. The retracted beam is retracted, and the bellows is raised to rotate and retract on the support material to take the embedded pipe to the beam position on the lower side, and then the beam on the upper side is restored to the predetermined position to cut the beam on the lower side. The load of the beam is stored in the upper beam, and the lower beam is similarly retracted to raise the abdomen to rotate and retract on the support material, and the buried pipe is laid at a predetermined position in the groove. A method for laying a buried pipe using a strut for a strike sheet pile.