JP4749914B2 - Partition facility construction structure and partition facility construction method in the approach part of underpass tunnel - Google Patents

Description

  The present invention relates to a partition facility construction structure and a partition facility construction method in an approach portion of an underpass tunnel.

Conventionally, underpass tunnels at three-dimensional intersections and the like have been constructed with vertical shafts on both sides of the tunnel portion, constructed between the compatible wells by a propulsion method, a shield method, and the like, and the approach portion is constructed by an open-cut method. In general, the approach portion is open at the top and has a concrete structure consisting of a side wall and a bottom. The approach section to be excavated requires earth retaining work such as driving piles in advance, and there are problems with the surrounding environment such as vibration and noise. Since the construction occupation area on the road required for excavation and shafts is wide, there is a problem that traffic troubles occur at construction sites in urban areas.
In order to solve such a problem, a method in which a shield excavator is started from the ground by a shield method and all the lines of the underpass tunnel are continuously constructed by the shield tunnel (see, for example, Patent Document 1).
By the way, partition equipment such as a railing or a soundproof wall may be attached to the upper end of the side wall portion of the approach portion. The installation surface (base part) of the partition facility is formed substantially parallel to the ground surface. For example, when the approach part is constructed by excavation, the foundation part is installed at the same time as the side wall of the approach part. The base was constructed by placing concrete rods after placing reinforcing rods and reinforcing bars in the interior.
JP 2005-248546 A

However, in Patent Document 1, the approach part is constructed by a segment, and there is a suitable construction method for attaching a partition facility directly or through a foundation part formed by placing concrete on the upper end surface of the segment. There was no problem.
Also, when a foundation is provided on the upper end surface of the installed segment, for example, a circular hole is drilled on the upper end surface, and an insert or the like is attached to the circular hole, and a reinforcing bar or anchor is connected to protrude above the segment. It was necessary to perform the work of embedding in the concrete of the foundation. As described above, since the work of attaching the reinforcing bars and anchors by processing the upper end surface of the segment occurs at the site, there is a drawback that it takes time and labor, and the construction work cannot be efficiently performed.

  The present invention has been made in view of the above-described problems, and has a simple construction structure, which improves the efficiency of the construction work and shortens the work time. The purpose is to provide a construction method.

In order to achieve the above object, the partition facility construction structure in the approach portion of the underpass tunnel according to the present invention is a partition facility that partitions the inside and outside of the approach portion above the segment constructed in the approach portion of the underpass tunnel. A partition facility construction structure in an approach portion of an underpass tunnel to which the first joint joint embedded in the upper end surface of the segment and a second joint joint provided in the lower end surface of the partition facility are provided, It is characterized in that the second joint is engaged with the one joint.
According to the present invention, when the segment is manufactured, the first joint joint is embedded in the upper end surface of the segment in advance, so that after the segment is installed in the approach portion, the second joint of the partition facility is attached to the first joint joint. A partition facility can be installed on the upper part of the approach part by engaging the joint. Since it is a simple joining structure that eliminates the need for processing on the segment at the site, the efficiency of construction work of the partition equipment can be improved.

Moreover, in the partition equipment construction structure in the approach part of the underpass tunnel according to the present invention, an underpass tunnel for attaching the partition equipment for partitioning the inside and outside of the approach part above the segment constructed in the approach part of the underpass tunnel. The partition equipment construction structure in the approach part of the above, a segment in which the connecting member protrudes above the upper end surface, and an installation surface of the partition equipment, and the concrete is placed so that the protruding connecting member is embedded It is characterized by being comprised from the formed base part and the partition installation attached to the upper surface of the base part.
According to this invention, after installing a segment in an approach part, the partition equipment can be installed in the foundation part which embed | buried the connection member which protrudes from the upper end surface of a segment, and laid concrete. And the segment and concrete are firmly connected via the connection member. Since it is a simple joining structure that eliminates the need for processing on the segment at the site, the efficiency of construction work of the partition equipment can be improved.

Moreover, in the partition equipment construction structure in the approach part of the underpass tunnel which concerns on this invention, it is preferable that the connection member is connected to the female coupling embed | buried under the upper end surface of a segment.
According to the present invention, after a segment having a female joint on the upper end surface is installed in the approach portion in advance, a connecting member is connected to the female joint, and the connecting member is embedded in the foundation portion on which concrete is placed. Partition facilities can be installed.

Moreover, in the partition equipment construction structure in the approach part of the underpass tunnel according to the present invention, an underpass tunnel for attaching the partition equipment for partitioning the inside and outside of the approach part above the segment constructed in the approach part of the underpass tunnel. A partition facility construction method in the approach part of the above, wherein a segment is formed by embedding a female joint on the upper end surface, a connecting member is connected to the female joint and protruded upward from the upper end surface, and the protruding connection Concrete is cast so that the members are embedded, a base part forming the installation surface of the partition equipment is formed, and the partition equipment is attached to the upper surface of the base part.
According to this invention, after installing a segment in an approach part, a segment and concrete are firmly connected via a connection member by connecting a connection member to the female joint of the upper end surface of a segment. Since it is a simple joining structure that eliminates the need for processing on the segment at the site, the efficiency of construction work of the partition equipment can be improved.

According to the partition facility construction structure and the partition facility construction method in the approach portion of the underpass tunnel of the present invention, the segment is placed in the approach portion by embedding the first joint joint in the upper end surface of the segment in advance when the segment is manufactured. After the installation, the partition equipment can be installed on the upper portion of the approach portion by engaging the second joint of the partition equipment with the first joint.
Moreover, after installing a segment in an approach part, the partition equipment can be installed in the foundation part which embed | buried the connection member which protrudes from the upper end surface of a segment and laid concrete.
In this way, a simple joining structure that eliminates the need for processing operations on the segment in the field can be realized. Therefore, the construction work can be performed efficiently without taking time and effort, and the work time can be shortened.

Hereinafter, the partition equipment construction structure and the partition equipment construction method in the approach part of the underpass tunnel according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a cutaway perspective view showing a partition facility construction structure according to a first embodiment of the present invention, FIG. 2A is a side view showing a schematic configuration of an underpass tunnel, and FIG. 1B is a view of a partition facility in an approach section. FIG. 3 is a side view showing the installation state, FIG. 3 is a view showing the joint part of the partition facility construction structure, (a) is a side view of the main part, and (b) is a cross-sectional view of the main part.

  As shown in FIG. 1, the partition facility construction structure 1 in the approach portion of the underpass tunnel according to the first embodiment is a shield tunnel constructed by a rectangular segment extended in a natural ground by a shield method. This is applied to the approach portion 2A of the underpass tunnel 2 such as a three-dimensional intersection. A partition facility 10 such as a soundproof wall or a balustrade is fixed to the upper end surface 20a of the segment 20 installed in the approach portion 2A via a joint portion S.

First, the underpass tunnel 2 and the approach part 2A to which the present partition facility construction structure 1 is applied will be described.
As shown in FIGS. 2A and 2B, the underpass tunnel 2 is constructed in a substantially U shape in a side view, and extends from the ground surface G to the tunnel portion 2B. It consists of an approach portion 2A that communicates up to 2B and is open at the top. In other words, a slope that gradually increases in depth from the ground toward the ground is formed, becomes a substantially horizontal direction at a predetermined depth, and further, an upward slope is formed at a predetermined position toward the ground. Yes.

As shown in FIG. 2A, the shield method employed in the construction of the underpass tunnel 2 can employ various well-known methods, but the first embodiment has the advantage of effective use of the cross section. A rectangular cross-section shield machine (not shown) is used, and a concrete segment is assembled behind this rectangular shield excavator.
In addition, this rectangular shield excavator can excavate by making each excavation cross section small, for example by dividing | segmenting a cutter into plurality. Then, by leading the upper cutter before the lower cutter, the approach portion 2A with a small earth covering can stably excavate the natural ground.

  As shown in FIG. 1, the segment ring 20 constructed continuously in the tunnel axis direction on the approach portion 2A is configured by connecting individual segment pieces in the circumferential direction, and is substantially U-shaped in a sectional view with the upper end opened. It has a shape. That is, the segment ring 20 includes side portions 20b and 20b and a bottom portion 20c. And the upper end surface 20a of the segment ring 20 is constructed so as to be substantially flush with the ground surface G, for example. Therefore, as the tunnel depth increases, the height dimension of the side portion 20b of the segment ring 20 (see FIG. 2B) increases.

  In the partition facility 10 according to the first embodiment shown in FIG. 1, a soundproof wall is targeted. The partitioning facilities 10 and 10 are arranged with their inner side surfaces 10b and 10b facing each other, and are continuously installed along the upper end surface 20a of the segment ring 20 in the tunnel axis direction. Moreover, the partition equipment 10 is divided | segmented into arbitrary lengths in the tunnel axial direction.

Next, the joint part S will be described. As shown in FIGS. 3A and 3B, two first joints 21, 21 are embedded at predetermined positions on the upper end surface 20 a of the segment 20 per piece of the segment. The first joint 21 is formed with box-shaped recesses 21a and 21a, and is provided with a locking plate 21b that covers the opening of the recess 21a on the same plane as the upper end surface 20a. A through hole 21c is formed in the approximate center of the plate 20b. Each first joint 21 is provided with an embedded reinforcing bar 22, and the embedded reinforcing bar 22 is embedded in the concrete of the segment 20.
Moreover, the 2nd junction joints 11 and 11 are embed | buried and provided in the lower end surface 10a in the partition equipment 10 in the position facing the 1st junction joints 21 and 21. As shown in FIG. The second joint joint 11 has the same configuration as the first joint joint 21, has a recessed portion 11 a, and is provided with a locking plate 11 b in which a through hole 11 c is formed in the lower end surface 10 a of the partition facility 10. Yes. Further, the embedded reinforcing bars 12 are also embedded in the partition facility 10 in the second joint joint 11.

Then, as shown in FIGS. 3A and 3B, the bolts 4 are attached in a state in which the through holes 21 c and 11 c are arranged coaxially and the partition equipment 10 is installed on the upper end surface 20 a of the segment 20. The through-holes 11 c and 21 c are inserted from the recessed portion 11 a of the second joint joint 11, and the nut 5 is inserted from the recessed portion 21 a of the first joint joint 21 and screwed to the tip of the bolt 4. Since the recessed portions 21a and 11a of the first and second joint joints 21 and 11 are provided facing the inner peripheral side (inner air side) of the segment 20, the bolt fastening operation is performed from the inside of the approach portion 2A. It can be carried out.
Then, by joining the upper end surface 20a of the segment 20 and the lower end surface 10a of the partition facility 10, the partition facility 10 is attached to the upper end portion of the approach portion 2A and the partition facility construction structure 1 is constructed.

  As described above, in the partition facility construction structure and the partition facility construction method in the approach portion of the underpass tunnel according to the embodiment, the first joint joint 21 is embedded in the upper end surface 20a in advance when the segment 20 is manufactured. The partition facility construction structure 1 between the facility 10 and the segment 20 is simplified, and a simple joining structure that eliminates the need for processing work on the segment at the site can be realized. Therefore, the construction work can be performed efficiently without taking time and effort, and the work time can be shortened.

Next, a modification of the first embodiment and the second embodiment will be described with reference to FIGS. 4 to 6, but the same or similar members and parts as those of the first embodiment described above. The same reference numerals are used to omit the description, and a configuration different from that of the first embodiment will be described.
4A and 4B are explanatory views of a partition equipment joint structure according to a modification of the first embodiment, in which FIG. 4A is a side sectional view showing the joining process, and FIG. 4B is a sectional view showing a state at the time of joining. is there.
As shown to Fig.4 (a) and (b), in the partition installation construction structure 1 by this modification, the 1st and 2nd junction joint by 1st embodiment (refer Fig.3 (a) and (b)) ), The segment 20 is provided with a third joint joint 30, and the third joint joint 30 is provided with a fourth joint joint 40. The third joint joint 30 and the fourth joint joint 40 are The joining is configured such that the partition facility 10 is slid in the tunnel axis direction (the F direction shown in FIG. 4A, which is referred to as “sliding direction”).
The third joint joint 30 is embedded in the upper end surface 20a of the segment 20, and a C-shaped metal piece 31 having a C-shaped cross section is disposed with the opening of the recess 31a facing the upper end surface 20a. Then, one end of an H-shaped metal piece 32 having an H-shaped cross section is fixed to the recess 31a, and the other end (projecting engagement portion 32a) projects upward from the upper end surface 20a.
On the other hand, the fourth joint 40 is provided on the lower end surface 10a of the partition facility 10, and has a C-shaped grooved metal 41 having a C-shaped cross section and a predetermined length in the sliding direction, It consists of a receiving hole 42 formed adjacent to the slide direction side of the mold 41. The C-shaped grooved metal 41 is arranged with the opening of the groove 41a facing the lower end surface 10a. The groove 41a has a tapered surface in the sliding direction.
The method of fixing the partition facility 10 to the segment 20 is to move the lower end surface 10a of the partition facility 10 in the direction of arrow E by first inserting the protruding engagement portion 32a of the third joint joint 30 of the segment 20 into the receiving hole 42. To be brought into contact with the upper end surface 20a of the segment 20. Next, when the partition facility 10 is slid along the upper end surface 20a in the direction of arrow F, the projecting engagement portion 32a is inserted into the groove portion 41a and engaged. At this time, since the groove portion 41a is formed in a tapered shape, the protruding engagement portion 32a is not easily pulled out by the wedge action.
In the modified example configured as described above, the segment 20 and the partition facility 10 can be connected to the segment 20 without performing a machining operation at the site, so that the same effect as that of the first embodiment is achieved.

Next, FIG. 5 is a sectional view showing a partition facility construction structure according to the second embodiment of the present invention, and FIG. 6 is a sectional view showing a partition facility construction structure according to a modification of the second embodiment.
As shown in FIG. 5, the partition facility construction structure 1 according to the second embodiment is a structure in which the partition facility 10 is fixed to the segment 20 via the concrete 50.
A cylindrical first coupler 61 (female joint) is embedded in the segment 20 of the approach portion 2A. The first coupler 61 is provided with a hole 61a, and a female screw is formed on the inner surface of the hole 61a. And it is embed | buried in the state which made the rebar 62 screwed together in the lower end side of the 1st coupler 61. FIG. The other end surface of the first coupler 61 is disposed on the same plane as the upper end surface 20 a of the segment 20.
Then, after the segment 20 is installed at a predetermined position, one end portion 63a of a connecting bolt 63 having male screws formed at both ends is screwed to the upper end side of the hole 61a of the first coupler 61, and the other end portion 63b is connected. It protrudes from the upper end surface 20a by a predetermined length. Then, a part of the second coupler 64 is screwed to the other end 63b, and the base end 65a of the second reinforcing bar 65 (corresponding to the connecting member according to the present invention) is screwed to the second coupler 64. Further, the molds 6 and 6 are installed so as to embed the second reinforcing bars 65, and the concrete 50 is placed in the mold 6. The upper surface 50 a of the concrete 50 is an installation surface of the partition facility 10.
In addition, the connection method of the partition equipment 10 and the concrete 50 is, for example, embedded a connection member (not shown) for attaching the partition equipment 10 to the concrete 50, or fixing the lower end portion of the partition equipment 10 together with the concrete 50. However, it goes without saying that a connection method corresponding to the structure of the partition facility 10 may be selected as appropriate.
As shown in FIG. 6, instead of the first coupler 61 (see FIG. 5) of the second embodiment, a substantially Y-shaped female insert 66 (female joint) in which a female thread is formed is connected to a segment 20. It is good also as a structure embedded in (a modification of 2nd embodiment).
Since the connection between the concrete 50 and the segment 20 that form the foundation of the partition facility 10 can be easily constructed in the field for the second embodiment and its modifications, the same effects as those of the first embodiment can be obtained. It is done.

As described above, the first and second embodiments of the partition facility construction structure and the partition facility construction method in the approach portion of the underpass tunnel according to the present invention have been described, but the present invention is the first and second embodiments described above. The present invention is not limited to this, and can be appropriately changed without departing from the spirit of the invention.
For example, in the first embodiment and the modification according to the present invention, the joining portion S has a joining structure formed by bolt fastening or sliding movement, but the invention is not limited to these joining structures. For example, as this other joint joint, a male joint in which a pin bolt is housed in one of the joint surfaces of the segment 20 or the partition facility 10 is provided, and a hole for inserting and fastening the pin bolt is formed in the other joint surface. The joining structure which fastens the segment 20 and the partition equipment 10 by inserting the pin bolt into the hole portion may be provided.
In the first and second embodiments, the partition facility 10 is intended for a soundproof wall, but is not limited to the soundproof wall. There are various types of partition facilities depending on the intended use, and the structures are different from each other. Therefore, the partition facility construction structure 1 suitable for the partition facility employed may be used.

It is a fracture perspective view showing the partition equipment construction structure by a first embodiment of the present invention. (A) is a side view which shows schematic structure of an underpass tunnel, (b) is a side view which shows the installation state of the partition installation in an approach part. It is a figure which shows the junction part of a partition installation construction, Comprising: (a) is the principal part side view, (b) is the principal part sectional drawing. It is explanatory drawing of the partition equipment joining structure by the modification of 1st embodiment, (a) is side sectional drawing which shows the joining process, (b) is sectional drawing which shows the state at the time of joining. It is sectional drawing which shows the partition installation construction structure of 2nd embodiment of this invention. It is sectional drawing which shows the partition installation construction structure by the modification of 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Partitioning equipment construction structure 2 Underpass tunnel 2A Approach part 10 Partitioning equipment 10a Lower end surface 11 2nd joining joint 20 Segment 20a Upper end surface 21 1st joining joint 30 3rd joining joint 40 4th joining joint 50 Concrete 61 1st coupler ( Female fitting)
63 Connecting bolt 65 Second rebar (connecting member)
66 Female Insert (Female Joint)

Claims (4)

A partition facility construction structure in the approach portion of the underpass tunnel, in which a partition facility for partitioning the inside and outside of the approach portion is installed above the segment constructed in the approach portion of the underpass tunnel,
A first joint joint embedded in the upper end surface of the segment;
A second joint joint provided on a lower end surface of the partition equipment;
Is provided,
A partition facility construction structure in an approach portion of an underpass tunnel, wherein the second joint is engaged with the first joint. A partition facility construction structure in the approach portion of the underpass tunnel, in which a partition facility for partitioning the inside and outside of the approach portion is installed above the segment constructed in the approach portion of the underpass tunnel,
The segment projecting the connecting member above the upper end surface;
None the installation surface of the partition facilities, a base portion which is formed by Da設concrete so that the connecting member formed by the projection is embedded,
The partition equipment attached to the upper surface of the foundation, and
A partition facility construction structure in the approach part of the underpass tunnel characterized by comprising 3. The partition facility construction structure for an approach portion of an underpass tunnel according to claim 2, wherein the connection member is connected to a female joint embedded in the upper end surface of the segment. A partition facility construction method in the approach portion of the underpass tunnel, in which a partition facility that partitions the inside and outside of the approach portion is installed above a segment constructed in the approach portion of the underpass tunnel,
Install the segment with the female joint embedded in the upper end surface,
Connecting a connecting member to the female joint and projecting upward from the upper end surface;
Placing concrete so that the protruding connection member is embedded, forming a base part that forms an installation surface of the partition equipment,
A partition facility construction method in an approach portion of an underpass tunnel, wherein the partition facility is attached to an upper surface of the foundation portion.

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