JP2003213708A - Construction method for underground structure and elevated traffic roadway - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for an underground structure and an elevated traffic roadway capable of suppressing traffic congestion accompanied by the work and obtaining a sufficient work space even though underground structures are constructed underground existing traffic structures, that is, traffic congestion due to construction work can be eliminated and the working efficiency can be improved. <P>SOLUTION: In an existing automobile road R where an excavation process for excavating the ground surface is applied until the ground surface is excavated down to a box culvert 40 embedded underground down to a floor surface T and including a building frame construction process building the box culvert 40 on the floor surface T, a bridge 10 is constructed above an automobile road R before excavation process, and cars M passing the automobile road R is bypassed through the automobile road R on the bridge 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an underground structure to be constructed below an existing traffic route and an elevated traffic route.

[0002]

2. Description of the Related Art Conventionally, underground structures such as subways, water and sewage systems, and common ditches have been constructed underground in existing roads. Such an underground structure is constructed by a so-called excavation method in which a ground body is buried in the ground after the ground is dug down from the ground surface.

[0003]

However, in the case of constructing an underground structure by an excavation method especially on a road in an urban area, in order to secure a space necessary for the work, a vehicle passing through an existing road is to be secured. At present, traffic restrictions such as traffic closure, one-way traffic, and lane restrictions must be enforced. If traffic control is applied to roads in urban areas with a large amount of traffic, it naturally causes traffic congestion, resulting in a great economic loss. On the other hand, for the builder, the work space cannot be secured, so the work efficiency is poor and the work is prolonged accordingly. Prolonged construction leads to an increase in construction cost and further traffic congestion, resulting in a great economic loss.

Furthermore, excavation work and hoisting work of materials and equipment are performed right next to automobiles and pedestrians over the entire construction section of several hundred meters, and the lanes are repeated many times as the construction progresses. Are subject to change and are very dangerous for passers-by. In addition, there are cases where work is performed at night when traffic is reduced, avoiding the daytime when road traffic is heavy.
Construction efficiency is poor due to limited work time.

From this point of view, the present invention is capable of minimizing traffic restrictions associated with construction and performing sufficient work even when an underground structure is constructed underground in an existing traffic route. It is an object to provide a method for constructing an underground structure that can obtain space, that is, can eliminate traffic congestion due to construction and improve construction efficiency, and further construct an underground structure. In this case, it is an object to provide an elevated traffic route that can reduce traffic congestion associated with construction and improve construction efficiency.

[0006]

In order to solve such a problem, the invention according to claim 1 is a floor structure in which an existing transportation route is constructed with a skeleton whose ground surface is buried in the ground. In the method of constructing an underground structure including an excavation step of digging up to a surface and a skeleton constructing step of constructing the skeleton on the floored surface, an elevated traffic path above the existing traffic path before the excavation step. And constructing an elevated traffic route to bypass the existing traffic route on the elevated traffic route.

According to such a method for constructing an underground structure, vehicles passing through an existing traffic route are diverted to an elevated traffic route constructed above the traffic route, so that traffic regulation associated with construction is minimized. Therefore, it is possible to minimize the occurrence of traffic congestion associated with the construction. Also, since a large working space can be secured for the builder, the work efficiency can be improved and the work period can be shortened. Further, the skeleton may be a box culvert or a pipe line that is continuous in the longitudinal direction, such as a subway or a water and sewer system, or may be used for starting and reaching a shield machine in the shield construction method. It may be a vertical shaft.

A second aspect of the present invention is the method for constructing an underground structure according to the first aspect, wherein the elevated traffic passage is installed along the existing traffic passage at predetermined intervals. And a stake extending downward from the footing, a pillar standing on the footing, and a floor slab installed on the upper portion of the pillar, and on the floor slab in the elevated traffic route construction step. The stake is provided in the footing after the existing traffic route is bypassed.

According to the method of constructing an underground structure, when the foundation of the elevated traffic route includes piles, the elevated traffic route is temporarily constructed in the form of a direct foundation by footing, and the floor of the elevated traffic route is tentatively constructed. After shunting the existing traffic route on the plate, piles will be installed in the footing under the elevated traffic route, so
The detour traffic can be opened early,
It is possible to reduce the scale of traffic regulation associated with the construction of piles.

A third aspect of the present invention is the method for constructing an underground structure according to the first aspect, wherein the elevated traffic path is a bottom slab placed on the ground, and is erected on the bottom slab. A supporting member, a top plate formed at an upper end of the supporting member, and a stake extending below the bottom plate, and the existing traffic passage is formed on the top plate in the elevated traffic passage building step. The stake is provided on the bottom slab after the detour.

In the method of constructing such an underground structure, an elevated traffic path is formed from a box body having a bottom plate, a supporting member and a top plate, such as a box-shaped section, a U-shaped section and a H-shaped section. In addition, it is a method of constructing an underground structure when piles are installed on the slab. Even if the elevated traffic route has such a structure type, the bypass traffic route can be opened early because the existing traffic route is bypassed on the top plate and the piles are constructed under the top plate. . Furthermore, the scale of traffic regulation associated with the construction of piles can be reduced.

A fourth aspect of the present invention is the method for constructing an underground structure according to any one of the first to third aspects, wherein the excavation step is performed before the excavation step. It is characterized by including a retaining wall construction step of constructing retaining walls along the edge of the region.

According to such a method of constructing an underground structure, the excavation area can be minimized and the influence on the surrounding ground can be suppressed by the earth retaining wall.

The invention according to claim 5 is the method for constructing an underground structure according to any one of claims 1 to 4, wherein the skeleton is constructed below the elevated traffic path. It is characterized by including a foundation exchange step of replacing the foundation of the elevated traffic route with the skeleton during the construction of the skeleton or after the construction of the skeleton.

According to such a method for constructing an underground structure, when the frame is constructed over the entire width of the existing traffic route, the frame is constructed in the ground below the elevated traffic route and the foundation of the elevated traffic route is constructed. Even if is built on the frame, the elevated traffic route can be constructed above the existing traffic route by replacing the foundation of the elevated traffic route with the frame. That is, it is possible to construct an elevated traffic route for bypassing a passing vehicle or the like above the existing traffic route regardless of the positional relationship between the frame and the elevated traffic route.

A sixth aspect of the present invention is the method for constructing an underground structure according to any one of the first to fifth aspects, wherein after the skeleton constructing step, the periphery of the skeleton is filled. It is characterized in that it includes a step of backfilling the body.

The invention according to claim 7 is the method for constructing an underground structure according to claim 6, wherein the elevated traffic route removing step of removing the elevated traffic route after the frame backfilling step It is characterized by including.

In this method of constructing an underground structure, the elevated traffic route constructed above the existing traffic route is used as a temporary structure. Therefore, after the construction of the underground structure is completed, the existing traffic route can be restored in the same way as before the construction.

The invention according to claim 8 is an elevated traffic route for circumventing a vehicle passing through the existing traffic route when digging down the existing traffic route to construct an underground structure. It is characterized in that it has a pile driven down to the bottom of the floor-mounting surface on which the structure is constructed, a pillar supported by the pillar, and a floor slab installed above the pillar.

According to such an elevated traffic route, since the piles are driven in below the floor-attached surface of the underground structure, even when the existing traffic route is dug down to construct the underground structure, the floor slab can be reliably secured. Supported. In other words, when digging into the existing traffic route, it is possible to bypass the vehicles that were passing through the existing traffic route on the floor slab, which can minimize traffic restrictions associated with construction, resulting in congestion. Occurrence can be minimized.

The invention according to claim 9 is the elevated traffic route according to claim 8 characterized in that a footing is provided at the lower end of the pillar.

According to such an elevated traffic route, the stability of the columns is increased, and as a result, the floor slab is reliably supported.

The invention according to claim 10 is the elevated traffic route according to claim 9, wherein the pile is driven in from above the footing.

Such an elevated traffic route is constructed by erecting columns on the footing, supporting the floor slab with the columns, and then driving piles from above the footing. In other words, by directly supporting the floor slab in the foundation form and opening the bypass traffic path early, and then driving the pile under the floor slab, traffic restrictions associated with the construction of the pile can be reduced, resulting in As a result, the occurrence of traffic congestion is suppressed.

The invention according to claim 11 is an elevated traffic route for circumventing a vehicle passing through the existing traffic route when digging down the existing traffic route to construct an underground structure. A pile that is driven down to the bottom of the floor surface on which the structure is constructed, and a precast box body that is installed on the existing traffic path, and the box body is a bottom plate supported by the pile, It has a support member standing on the bottom plate and a top plate formed on the upper end of the support member.

According to such an elevated traffic route, since the piles are driven down below the floor-attached surface of the underground structure, even if the existing traffic route is dug down to construct the underground structure, the box body is surely secured. Supported. That is, when digging into the existing traffic route, it is possible to divert vehicles that were passing through the existing traffic route onto the box, so it is possible to reduce traffic restrictions associated with construction, resulting in congestion. Is suppressed.

The invention according to claim 12 is the elevated traffic route according to claim 11, wherein the pile is driven from above the bottom slab.

Such an elevated traffic route is constructed by installing a box on the existing traffic route and then driving a pile from the inside of the box. That is, since the box is installed on the existing traffic path and the bypass traffic path is opened early, and the pile is constructed from the inside of the box, it is possible to reduce the traffic regulation associated with the construction of the pile, As a result, the occurrence of traffic congestion is suppressed.

The invention described in claim 13 is the elevated traffic route according to any one of claims 8 to 12, wherein the pile is supported by the underground structure, and The feature is that the part that penetrates the underground structure has been removed.

According to such an elevated traffic route, even after the construction of the underground structure is completed, the vehicle can be continuously diverted onto the floor slab.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a method for constructing an underground structure and an elevated transportation path according to the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same elements will be denoted by the same reference symbols, without redundant description.

Below, as shown in FIG. 1 (a), a box culvert 40, which is a skeleton to be buried in the ground, is provided below a motorway R of four oncoming lanes (two lanes on each side) which are existing traffic routes. Taking the case of construction as an example, each step of the method for constructing an underground structure according to the present invention will be described in detail, and at the same time, a bridge 10 as an elevated traffic route for bypassing a vehicle M passing through a motorway R will be described. The details will be described.

(Elevated Traffic Route Construction Process) As shown in FIG. 1 (b), before the ground surface of the automobile road R is dug up to the floor-attached surface T where the box culvert 40 is constructed, the elevated road R A bridge 10 which is an elevated traffic route is constructed, and a part of a vehicle M passing through a motorway R is detoured on a floor slab 3 of the bridge 10. Further, the bottom of the floor slab 3 can be used as a work band S for performing the subsequent work. For example, as shown in FIG. 1B, a gate crane S1 is installed or an excavating machine S2 is installed. , The construction vehicle S3 and the like can be put on standby.

In the illustrated embodiment, the bridge 10 is a rigid frame type pier 1 which is erected at predetermined intervals along the motorway R.
And a floor slab 3 installed on it. In addition, the ramen-type pier 1 includes footings 4 and 4, piles 5 and 5 extending downward from the footings 4, columns 2 and 2 standing on the footings 4 and 4, and girders bridged over the columns 2 and 2. It consists of 6 and 6. That is, the bridge 10 includes a pile 5 driven down to a floor-attached surface T where the box culvert 40 is constructed, a pillar 2 supported by the pile 5, and a floor slab 3 installed on the upper portion of the pillar 2. Further, a footing 4 is provided at the lower end of the column 2, and a work yard S for constructing the box culvert 40 is formed below the floor slab 3. Although illustration is omitted, the bridge 10 has a sloped portion that slopes toward the motorway R before and after the construction section, and a sliding portion for sliding the bridge 10 and the motorway R. .

The structural form and construction method of the bridge 10 are
Although not limited to the illustrated embodiment, it is possible to reduce the scale of traffic regulation for the motorway R,
And it is desirable that it can be constructed quickly. For example, the pillars 2 adjacent to each other in the bridge axis direction are set upright on the footing 4, respectively, and the floor slab 3 is conveyed to a predetermined position by a movable carriage in units of one span, and the floor slab 3 is placed on the pillar 2 at an inclined portion. After temporarily placing the floor slab 3 at the same height, the bridge slab 3 is lowered by a descending device such as a jack, and the floor slab 3 and the motorway R are connected to each other. As a result, it is possible to reduce the scale of construction and the process, and further reduce the scale of traffic regulation.

The footings 4 and 4 may be made of precast, and the bridge 10 is constructed in the form of a direct foundation by the footings 4 and 4, and in this state, the motorway R is detoured on the floor slab 3. Later, the footings 4 may be provided with the piles 5 under the floor slab 3. In this case, if the vertical holes are formed in the footing 4 so that the pile 5 can be driven from the upper surface side of the footing 4, the pile 5 can be easily constructed. Also,
If necessary, ground improvement may be performed below the footing 4. As described above, by shunting the vehicle M on the bridge 10 and then driving the piles 5 under the floor slab 3, the bypass traffic passage can be opened early, and the scale of traffic regulation associated with the construction of the piles 5 can be increased. Can be reduced. In addition, as shown in FIG.
The part protruding from the slab 3 (horizontal girder 6) is a pillar (Fig. 8).
When used as reference numeral 2) in (a), FIG.
The footings 4 and 4 shown in (b) may be omitted. That is, the piles 5 and 5 driven into the floor culvert 40 below the floor surface T, the cross girders 6 installed on the upper ends of the piles 5 and 5, and the floor slab 3 installed on the upper surfaces of the cross girders 6. The bridge 10 may be configured with and.

(Retaining Wall Construction Step) Next, as shown in FIG. 2 (a), the retaining wall 20 is constructed along the edge (see FIG. 3) of the region to be excavated in the excavation step described later.

The earth retaining wall 20 as described above can be constructed by, for example, a ready-made sheet pile system in which steel sheet piles or steel pipe sheet piles are driven into the ground, or a cast-in-place method such as a continuous underground wall. The earth retaining wall 20 can minimize the excavation area and can suppress the influence of excavation on the surrounding ground. In this embodiment, the retaining wall 20 is constructed after the elevated traffic route construction process, but the construction order is not limited to this, and for example, before the elevated traffic route construction process, or In parallel with this, the retaining wall 20 may be constructed.

(Excavation Step) Next, as shown in FIGS. 3 (a) and 3 (b), the floor surface T on which the box culvert 40 is constructed on the ground surface of the motorway R using the excavating machine S2 and the like.
Dig up to.

Further, as shown in FIG. 2 (b), the girder receiving piles 34 are driven in at an early stage of excavation, and the lining plate receiving girders 32, 33 are provided on the upper portions of these and the retaining walls 20, 20. Along with the erection, a lining plate 31 covering the excavation area is laid on the upper surface thereof. Thereby, even if the motorway R is dug down, the passage of the vehicle M on both sides of the work zone S and the bridge 10 can be secured. That is, since the lower part of the floor slab 3 can be used as the permanent work belt S, the construction efficiency is improved. Then, as shown in FIGS. 3 (a) and 3 (b), according to the excavation depth or the like, the girder 35 is appropriately installed between the retaining walls 20 and 20, and the ground G1 below the motorway R is grounded. Drill down to T.

(Body construction step) After the excavation up to the floor-attached surface T is completed, the box culvert 40 buried in the ground is constructed.

The method for constructing the box culvert 40 is not particularly limited. For example, when the box culvert 40 is made of reinforced concrete, the crushed foundation stone 41 is laid on the floor-attached surface T, and the rebar and the mold are formed. It is constructed by casting the concrete in-situ after assembling the frame.

(Fundamental Replacement Step) As shown in FIG. 3 (b), the bridge 1 is installed at a position where the box culvert 40 is constructed.
When the pile 5 of 0 and the girder receiving pile 34 are erected, these are appropriately replaced with the box culvert 40 during the construction of the box culvert 40 or after the construction of the box culvert 40. In addition, when the cross beam 35 is bridged horizontally, as will be described later, it is removed at the stage of backfilling to the lower part thereof.

Box culvert 4 of pile 5 and girder receiving pile 34
The method of transferring to 0 can be performed by a known method. For example, as shown in FIG. 4A, the piles 5 and the girder receiving piles 34 penetrate the upper and lower floor slabs of the box culvert 40. In the state where the box culvert 40 is reinforced and concrete is placed, and after the concrete is hardened (after the box culvert 40 is constructed), while removing the pile 5 and the girder receiving pile 34 that penetrate the inside of the box culvert 40, The load acting on the pile 5 and the girder receiving pile 34 is applied to the box culvert 4
0 (see FIG. 5 (a)) or FIG. 4 (b)
As shown in FIG. 3, the box culverts 40 are divided and constructed in front of and behind the piles 5 and the girder receiving piles 34 (in the direction perpendicular to the paper surface in the drawing). After exchanging the load supported by, the pile 5 and the girder receiving pile 34 are removed, and the box culvert 40 is placed at this position.
And how to build the rest of the site. Further, the pile 5 left below the box culvert 40 may be used as a support pile for the box culvert 40.

(Body backfilling process) Box culvert 40
After completion of the construction, the back beams 35 are sequentially removed and the back surface of the lining plate support girder 33 is backfilled (see FIGS. 5A and 5B), and the lining plate 31 and the lining plate support girder 32, After removing 33 and 33, they are backfilled to the ground surface (see FIGS. 6A and 6B).
The girder 35 is removed when the lower part of the girder 35 is backfilled.

(Bridge removal process) When the bridge 10 is used as a temporary structure only during the period for constructing the box culvert 40, as shown in FIG. 7, this is removed after the backfilling is completed. .

As described above, prior to the excavation of the ground G1 and the construction of the box culvert 40, the vehicle M or the like passing through the motorway R is diverted to the bridge 10 constructed above it, so that the excavation of the ground G1 is performed. When constructing the box culvert 40, the traffic on the motorway R is not obstructed, and therefore, the traffic congestion associated with the construction can be minimized. Further, since the work belt S provided below the bridge 10 can be made permanent, it is possible to improve the construction efficiency and shorten the construction period.

The elevated traffic route is not limited to the bridge type as described above, and as shown in FIG. 8B, a bottom slab 51 placed on the ground and a support erected on the bottom slab 51. Member 5
The box body 50 may be composed of 2, 54, a top plate 53 formed on the upper ends of the support members 52, 54, and a pile 5 extending below the bottom plate 51. That is, an elevated traffic path is configured by the piles 5 that are driven in below the floor-attached surface T where the box culvert is constructed, and the precast box body 50 that is installed on the motorway R, and the box body 50 is The bottom plate 51 is supported by the piles 5, the support members 52 and 54 are provided upright on the bottom plate 51, and the top plate 53 is formed on the upper ends of the support members 52 and 54. Even in the elevated traffic route including the box body 50, as in the above-described embodiment, by detouring the existing traffic on the top slab 53 and then constructing the pile 5 under the top slab 53, the detour is performed. It is possible to open the traffic path early and reduce the scale of traffic regulation associated with the construction of the pile 5. Note that the cross-sectional shape of the box body 50 is not limited to the illustrated shape, and may have a box-shaped cross section or a horizontal H-shaped cross section, for example. In addition, the floor slab 51, the support members 52 and 54, and the top slab 53 are composed of precast members divided into appropriate sizes,
By assembling by a self-propelled gate type crane installed on the motorway R, an elevated traffic route can be constructed earlier.

In the illustrated embodiment, there is a gap between the earth retaining wall 20 and the box culvert 40, but the gap is not limited to this, and the earth retaining wall 20 and the side wall of the box culvert 40 are closely attached to each other. That is, the retaining wall 20 may be used as the main body of the box culvert 40.

Further, the skeleton may be a box culvert or a pipe line which is continuous in the longitudinal direction such as a subway or a water and sewer system, and is used for starting and reaching a shield machine in the shield construction method. It may be a vertical shaft.

Further, the structure type of the elevated traffic route is not limited to that of the above-mentioned embodiment, and an optimum one may be selected in consideration of construction conditions and the like.

For example, as shown in FIG. 9 (a), a plurality of piles 7 that are driven down to the support layer below the floor-attached surface T of the box culvert 40, and a box erected on the upper ends of these piles 7 The bridge 10 may be configured with the girder type floor slab 3.
In the bridge 10 shown in FIG. 9, the upper portion of the pile 7 (the portion protruding above the motorway R) corresponds to a pillar that supports the floor slab 3. Further, the upper portions of the piles 7, 7 are connected to each other by a brace member 72 and a cross beam 73.

Then, similarly to the above-described embodiment, after the vehicle M passing through the motorway R is diverted onto the floor slab 3 and before the motorway R is dug down, the edge of the region to be excavated is Build retaining walls 20 and 20 along with piles 7
After driving the auxiliary piles 71 (see FIG. 9 (b)) to the side of the ground, the ground G1 is dug down to the floor-bearing surface T while the traverse walls 20 and 20 are appropriately erected, and then the floor-bearing surface T is dug. Build a box culvert 40 on the plane T.

In the above-described embodiment, the box culvert 40 which is completely buried in the ground is shown as an example of the skeleton, but, for example, the cut structure 45 shown in FIG. 10B.
As described above, a so-called semi-underground structure having an open upper surface may be used. Such an excavated structure 45 is shown in FIG.
As shown in FIG. 1, when the plane culvert 40 is graded to a grade intersection, it is often constructed in the approach portion (symbol A in FIG. 11) before and after the box culvert 40.

Further, the bridge 10 shown in FIG. 10 (a) is provided below the floor-attached surface T of the cut structure 45 and a plurality of piles 8 driven up to the support layer, and erected on the upper ends of these piles 8. The floor slab 3 and In addition, FIG. 10 (a) (b)
In the bridge 10 shown in (1), the upper portion of the pile 8 (the portion protruding above the motorway R) corresponds to a pillar that supports the floor slab 3.
Further, the piles 8 are made into a pair by braces 82, and the upper ends thereof are connected to each other by cross beams 83.

Then, as in the case of constructing the box culvert 40 described above, the bridge 10 is provided above the motorway R.
(Refer to FIG. 10 (a)), a part of the vehicle M passing through the motorway R is detoured on the floor slab 3 of the bridge 10, and then the ground surface of the motorway R is extended to the floor-bearing surface T. After digging, the cut structure 45 is constructed on the floor-attached surface T.

Thus, the trench structure 4 having an open top surface
Also in the case of constructing No. 5, by detouring the vehicle M passing through the automobile road R to the bridge 10 constructed above the excavation of the ground G1, the traffic regulation on the automobile road R can be reduced. As a result, it is possible to minimize traffic congestion associated with construction.

[0058]

According to the method of constructing an underground structure according to the present invention, a vehicle or the like passing through an existing traffic route is diverted onto a bridge constructed above the traffic route, and then the ground is removed. Since excavation and construction of the skeleton are performed, traffic restrictions associated with these works can be minimized, and therefore, the occurrence of traffic congestion associated with the works can be minimized. Also, since a large working space can be secured for the builder, the work efficiency can be improved and the work period can be shortened.

[Brief description of drawings]

FIG. 1A is a schematic view showing a motorway before an underground structure is constructed, and FIG. 1B is a schematic diagram explaining an elevated traffic route construction step.

FIG. 2 (a) is a schematic diagram for explaining a retaining wall construction step,
(B) is a schematic diagram showing a state where a lining plate is laid.

FIG. 3 (a) is a schematic view explaining an excavation process, and FIG. 3 (b).
[Fig. 3] is a schematic view showing a state where the excavation process is completed.

FIG. 4 (a) is a schematic diagram illustrating a body building step,
(B) is a schematic diagram explaining other modes of a body construction process.

5A is a schematic diagram illustrating a body backfilling process following FIG. 4B, and FIG. 5B is a schematic diagram illustrating a body backfilling process subsequent to FIG.

6A is a schematic view showing a state in which a lining plate has been removed, and FIG. 6B is a schematic view showing a state in which a body backfilling process is completed.

FIG. 7 is a schematic view showing a state where the bridge is removed.

FIG. 8 is a schematic view showing another form of an elevated traffic route.

FIG. 9 is a schematic view showing another form of an elevated traffic route.

FIG. 10 is a schematic view showing another form of an elevated traffic route.

11 is a side view of the elevated traffic route shown in FIGS. 9 and 10. FIG.

[Explanation of symbols]

1 Ramen type pier 2 props 3 floor slabs 4 footing 5 piles 6 horizontal girders 10 Bridges (overpass) 20 earth retaining wall 31 Lining Board 32,33 Lining plate girder 34 girder stake 35 Girder 40 box culvert (underground structure) 45 Excavation structure (underground structure) 41 Foundation crushed stone 50 boxes 51 Bottom plate 52, 54 support members 53 Top plate R motorway M vehicle T floor attached surface G1 original ground G2 backfill soil S work belt Equipment for S1 work S2, S3 construction vehicle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuaki Kobayashi             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Seishin Itami             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Masaki Yuguchi             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Yasuo Nishida             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. F-term (reference) 2D055 BA07                 2D059 BB37 CC01

Claims (13)

[Claims] 1. In an existing traffic route, a digging step of digging the ground surface up to a floor-bearing surface where a skeleton to be buried in the ground is constructed, and a skeleton constructing step for constructing the skeleton on the floor-bearing surface. In the method for constructing an underground structure including the above, before the excavation step, an elevated traffic route is constructed above the existing traffic route, and the elevated traffic route is constructed to bypass the existing traffic route on the elevated traffic route. A method for constructing an underground structure, comprising: 2. The elevated traffic passage is provided with footings installed at predetermined intervals along the existing traffic passage, stakes extending downward from the footing, pillars standing upright on the footing, and the pillars. A slab installed on the upper part of the slab, wherein in the elevated traffic route construction step, the pile is provided in the footing after the existing traffic route is detoured on the slab. Item 1. The method for constructing an underground structure according to item 1. 3. The elevated traffic passage includes a bottom plate placed on the ground, a support member standing on the bottom plate, a top plate formed at an upper end of the support member, and a lower portion of the bottom plate. The stake is extended to, and in the elevated traffic route construction step, the stake is provided to the bottom slab after the existing traffic route is bypassed on the top slab. How to build an underground structure. 4. The earth retaining wall construction step of constructing an earth retaining wall along an edge of a region to be excavated in the excavating step, before the excavating step. The method for constructing an underground structure according to item 1. 5. The foundation structure that is constructed below the elevated traffic passage, and receives the foundation of the elevated transportation passage to the skeleton during the construction of the skeleton or after the construction of the skeleton. The method for constructing an underground structure according to any one of claims 1 to 4, further comprising a replacement step. 6. The construction of an underground structure according to any one of claims 1 to 5, further comprising a skeleton backfilling step of backfilling the periphery of the skeleton after the skeleton construction step. Method. 7. The method for constructing an underground structure according to claim 6, further comprising: an elevated traffic route removing step of removing the elevated traffic route after the frame backfilling step. 8. An elevated traffic route for circumventing a vehicle passing through the existing traffic route when the existing traffic route is dug down to construct an underground structure, the floor on which the underground structure is constructed. An elevated traffic path having a pile driven down to the bottom of the attachment surface, a pillar supported by the pillar, and a floor slab installed above the pillar. 9. The elevated traffic route according to claim 8, wherein a footing is provided at a lower end of the pillar. 10. The elevated traffic route according to claim 9, wherein the pile is driven in from above the footing. 11. An elevated traffic route for circumventing a vehicle passing through the existing traffic route when the existing traffic route is dug down to construct an underground structure, the floor on which the underground structure is constructed. It is composed of a pile driven down to the bottom of the attachment surface, and a precast box body installed on the existing traffic route, the box body being a bottom plate supported by the pile and standing on the bottom plate. An elevated traffic path having a support member and a top plate formed on an upper end of the support member. 12. The elevated traffic route according to claim 11, wherein the pile is driven in from above the bottom slab. 13. The pile is supported by the underground structure, and a portion penetrating the underground structure is removed, according to any one of claims 8 to 12. Elevated traffic route described.