JP2002180413A - Support structure of lining plate and lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure of a lining plate and a lining method capable of reducing a previous excavating quantity. SOLUTION: This support structure improves a structure for placing the lining plate 8 on a receiving beam 7 by placing the receiving beam 7 at a prescribed interval in the lateral direction on a beam seat 6 by arranging the beam seat 6 in the direction of an excavated groove 1 on the upper left and right both sides of an excavation work position under a road surface. That is, in this method, the beam seat 6 has an angle-shaped cross-sectional part so as to place an end part of the receiving beam 7 along an end surface and an end part under surface of the receiving beam 7, and is placed and arranged on the ground 2 under the vicinity of the excavated road surface. A vertical piece part 6a of the angle-shaped cross-sectional part of the beam seat 6 constitutes an earth retaining wall to the receiving beam 7 side under the vicinity of the road surface, and the vertical piece part 6a of the angle-shaped cross- sectional part of the beam seat 6 also serves as a regulating plate for regulating a lateral movement of the lining plate 8 placed on the receiving beam 7. In this lining method, lining work is performed before construction and excavating work of the earth retaining wall 4 caused by excavating work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a lining plate for an open-cutting work to be performed when piping for water supply and sewerage, wiring and the like is buried underground, or when other structures are buried and installed. Related to lining method.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, after a pavement is cut and removed from a pavement road surface 5 by a predetermined width on a ground 2 where an excavation groove 1 is cut, as shown in FIG. In the width, the sheet piles 3 are sequentially arranged and driven or press-fitted to construct the retaining wall 4, and then the upper part of the excavation groove 1 is temporarily excavated at least to a depth necessary for attaching the girder support. A girder support 6 'along the groove direction was attached to the upper part of the left and right inner surfaces of 4.

The attachment of the girder 6 'is to fix the girder 6 to the inner surface of the retaining wall 4 at a height determined by calculating backward from the surface of the lining plate. A bolt hole (not shown) is drilled at a predetermined position in the sheet pile 3 constituting the wall 4 by gas fusing or the like, and a channel steel 6 (or an outer side along an angle steel or the like) girder support 6 ′ is attached to the inner surface of the sheet pile 3. The bolts are sequentially attached in the front-rear direction by bolts.

[0004] Then, on the girder support 6, a girder 7 ′ in the left-right direction.
Are placed at predetermined intervals in accordance with the length or width of the lining plate 8 in the front-rear direction, and then the front and rear ends of the lining plate 8 are sequentially placed on the receiving girder 7 along the groove direction. Paved. At this time, the upper part of the sheet pile 3 which is obstructed for placing the girder is cut off,
Alternatively, it is set in advance so that the upper end is lowered during driving.

[0005] Further, at the left and right ends of the receiving girder 7 at the end of the laying of the lining plate 8, there are earth retaining from the both sides of the road surface with respect to the excavation groove 1, and a channel steel or the like for regulating the left and right movement of the lining plate 8. Is attached by temporary welding or the like.

[0006] After the above-mentioned lining plate is installed, the lining plate 8 is sequentially removed and the upper part of the excavated portion is sequentially wrapped. Excavate. After completion of the main excavation, brackets 11 are attached to both inner surfaces of the retaining wall 4 to be restored, and the bracket 12 is mounted thereon.

After that, installation of buried objects, backfilling of the excavation trench 1,
The construction is completed by removing the lining board, pulling out the sheet pile, and temporarily paving. When the operation is interrupted in the temporary excavation state during the operation, the temporary excavation state is buried in the temporary excavation state, and the next operation is awaited.

[0008]

However, in the case of the above-mentioned prior art method, road lining, particularly in an urban area, requires
Traffic blocking or lane regulation is performed, and construction must be completed within that time. Therefore, it must be completed in a short time and within the regulation time, traffic must be released quickly, and stable road lining without flapping must be performed.

[0009] In addition, the construction on site may cause unexpected accidents, and even in such a case, it is necessary to immediately stop the operation and open the traffic.

[0010] Further, as the order of construction, cutting and removal of pavement, temporary restoration, cloth digging, pile pile driving, temporary covering, old road covering, and road surface lining are performed in many steps, so that the number of days and loss of materials are extremely low. Many.

For example, in the conventional construction method, it is necessary to construct a retaining wall using sheet pile steel or the like and install a girder before the lining. There are problems such as excavation of the work space outside the wall and backfilling of temporary excavation depending on the work procedure. An object of the present invention is to provide a lining plate support structure and a lining method for solving the above problems.

[0012]

According to the present invention for solving the above-mentioned problems, firstly, a girder support 6 is installed along the direction of the cutting groove 1 on both the left and right sides of the upper part of the cutting work position under the road surface, In the structure in which the girder 7 is placed on the girder 6 in the left-right direction at a predetermined interval and the lining plate 8 is placed on the girder 7, the girder 6 is in contact with the end face of the girder 7. An angle-shaped cross-section is provided so that the end of the girder 7 is placed along the lower surface of the end, and is placed and arranged on the ground 2 below the excavated road surface.

Second, the vertical piece 6a of the angled cross section of the girder support 6 constitutes a retaining wall on the side of the girder 7 near the road surface.

Third, the vertical piece 6a of the angled cross section of the girder support 6 also serves as a restriction plate for restricting the left and right movement of the lining plate 8 placed on the support girder 7. I have.

Fourth, a notch 7a is provided at a lower portion of the end of the girder 7 to be placed on the girder 6 and a bottom portion 6b of the girder 6 is provided on the bottom side of the notch 7a. To be placed on the bottom plate 18
Is provided.

Fifth, before the construction and excavation of the earth retaining wall 4 accompanying the digging work, the lining work of claims 1 and 2 is performed.

[0017]

FIG. 1 shows an embodiment of the present invention.
Members other than the girder 6 ', the girder 7' and the regulating member 9 'in FIG. 4 are the same as those already described in the same figure, and therefore, detailed description will not be repeated.

The example shown in FIG. 1 is characterized by the cross-sectional shape of the girder 6, the installation position, the installation order, and the like. Correspondingly, the shape of the girder 7 and the mounting state on the girder support 6 are characterized. There is.

That is, the girder support 6 is made of an angle steel (for example, H300 mm × L200 mm) having an L-shaped (angled) cross section composed of a vertical piece 6 a and a bottom piece 6 b and having a predetermined length (for example, 3 m).
Are used by sequentially connecting them. The joint part is a bottom piece 6b at the end of each girder support 6, as shown in FIGS.
The plate 16 is fixed thereon by welding or the like, and a bolt (not shown) is inserted into a bolt hole 17 of each plate 16 in a state where the adjacent ends are abutted with each other to be fixed and fixed to a predetermined length (for example, 50 to 50 mm). 100m) Connect and arrange sequentially.

As shown in FIGS. 1 to 3, the receiving girder 7 is an H-shaped steel having a length corresponding to the laying width (example L = 2000) of the lining plate 8 (example size H200 × W1000 × L2000). (H250 × W300), the lower part of both ends is a predetermined depth (about 200 mm from the end, about 195 mm from the bottom)
An angle-shaped notch 7a is provided at the position, and a bottom plate 18 parallel to the upper surface is fixed to the upper surface (the lower surface of the uncut end) of the notch 7a by welding or the like. Thus, the notch 7
The upper part of a is also reinforced by forming an H shape in a side view. Further, an end plate 19 is integrally fixed to the notch end surface in the vertical direction so as to form an angle with the bottom plate 18. The end plate 19 itself becomes a retaining plate.

After the pavement of the road surface 5 is cut off, the pavement is peeled and removed, and the inside of the pavement cut surface 10 is laid at a depth corresponding to the height of the approximately vertical piece 6a of the girder support 6 (approximately). 300m
m) Excavate only. Next, after a certain leveling and preferably consolidation of the ground surface at both inner end portions of each of the pavement cut surfaces 10, the girder 6 having an L-shaped cross section is arranged along the ground surface corner, and the required length is set. Only lay in a rail shape.

Before or after the laying of the girder support 6, the ground at the position where the girder support 7 is to be arranged is to have a width corresponding to at least the width of the girder support 7 and an expected bottom surface depth of the girder 7 (the upper surface of the girder support bottom piece 6 b). More than 20
0-250mm) and the receiving girder 7
By stably mounting the bottom plates 18 at both ends on the bottom piece 6b of the beam receiver 6, the beam receivers 7 are arranged at a predetermined pitch (about 3 m). In the excavation, substantially the entire surface between the left and right girder supports may be excavated in advance.

The above operation makes it possible to lay the lining plate 8, and the lining plate 8 is 200 × 3000 × in the example shown in FIG.
After the lining board is finished, the work of driving the sheet pile 3 for the construction of the next retaining wall 4 or the like is started after completion of the lining board, or Keep the lining state for the driving work. Subsequent main excavation and construction of the retaining wall 4 are performed in the same manner as in the above-described conventional method, except that the girder support 6 can be installed and lining before the sheet pile driving operation. .

In particular, according to the example of the present invention, the excavation depth D ₂ from the road surface 5 required for the girder receiving work is about 300 mm.
On the other hand, according to the conventional method, the depth D ₁ for installing the girder requires a temporary excavation of an open part of at least 850 mm and an excavation of the work space outside the sheet pile 3,
The required amount of excavation differs significantly between the two methods.

Other features of the above embodiment include the following. (1) Since the supporting portion of the girder is lowered, the amount of excavated soil and excavation can be reduced, so that the removal and temporary placement of the remaining soil is reduced, and the number of heavy machinery and vehicles can be reduced as much as possible, thus shortening the work time. (2) Since the excavation depth is small, the probability of hitting obstacles such as buried objects is small, and the shallow portion near the pavement surface becomes the supporting ground, so that the girder can be installed on the ground bearing ground or on the ground. (3) Since the girder supports can be connected continuously, the load can be dispersed. (4) If the pavement has a size of 30 or more, the roadbed material can be reused and effectively used. (5) Since the girder serves as a width stop, the stability of the girder can be measured. (6) Since backfilling can be performed up to about 300 mm below the road surface, rolling compaction is easy. (7) Temporary restoration can be performed simultaneously with removal of the lining, and material can be saved.

[0026]

According to the present invention constructed as described above, the lining work is simplified, labor and resources are saved, the cost is reduced, the construction period is shortened, and the stability of the lining part is ensured. Noise reduction, etc.
In particular, there is an advantage that a major reform of the excavation work in the city area can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a lining plate support structure of the present invention.

FIG. 2 is a plan view of the lining plate support structure.

FIG. 3 is an enlarged perspective view of a lining plate support structure.

FIG. 4 is a sectional view of a conventional lining plate support structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening groove 2 Ground 5 Road surface 6 Girder 6a Vertical piece 6b Bottom piece 7 Receiving girder 7a Notch 18 Bottom plate

Claims (5)

[Claims] 1. A girder support (6) is installed along the direction of a digging groove (1) on both left and right sides of an upper part of a digging work position under a road surface,
In a structure in which a receiving girder (7) is mounted on the girder support (6) in a left-right direction at a predetermined interval, and a lining plate (8) is mounted on the girder support (7). (6) a ground (2) having an angle-shaped cross-section so that the end of the girder (7) is placed along the end surface of the girder (7) and the lower surface of the end; A support structure for a lining plate placed and placed on top. 2. The supporting structure for a lining plate according to claim 1, wherein the vertical piece (6a) of the angled cross section of the girder (6) forms a retaining wall on the side of the girder (7) below the road surface. . 3. A lining plate (8) in which a vertical piece (6a) of an angled cross section of a girder support (6) is placed on a girder (7).
The support structure for a lining plate according to claim 1, wherein the lining plate also serves as a regulating plate for regulating lateral movement of the lining. 4. A notch (7a) is provided at a lower portion of a portion placed on the girder (6) at the end of the receiving girder (7), and a girder (7) is provided on the bottom side of the notch (7a). 4. A bottom plate (18) mounted along the bottom piece (6b) of (6).
Lining board support structure. 5. The lining method according to claim 1, wherein the lining work according to claim 1 or 2 is carried out before the construction and excavation work of the retaining wall (4) accompanying the digging work.