JP2992400B2 - Underground construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground construction method, and more particularly to an underground construction method capable of minimizing work on the ground without obstructing traffic flow on the ground.

[0002]

2. Description of the Related Art Conventionally, in the underground excavation of a road in the so-called open-cutting method, such as an open shield method for constructing an underground structure, the upper portion of an excavated pier is covered only during nighttime when construction is interrupted. To make traffic possible. However, during construction, they occupy roads and block traffic.

On the other hand, in recent years, a so-called geofront concept (underground city planning) and the like have been proposed as a proposal for creating a comfortable urban space, but the technical approaches necessary to promote this have been sufficiently made. Absent. If an expressway or an arterial road is made underground and structures are built on top of it, efficient use of urban space can be measured. It is difficult only with the construction method.

[0004]

In the above-mentioned conventional construction method, vehicles cannot pass during construction work such as excavation.
The construction must be interrupted to allow the vehicle to pass.

In the conventional construction method, it is necessary to install and remove the road surface every time the occupation is changed for lining. This is a major problem especially at intersections.
If such problems cannot be sufficiently solved, it is impossible to realize a geofront concept (underground city planning) and the like, and it is desired to develop an effective construction method that does not block ground traffic.

The present invention has been made in view of the above, and does not obstruct traffic flow even during construction, and
An object of the present invention is to provide an underground construction method capable of avoiding work on the ground as much as possible.

[0007]

Means for Solving the Problems The present inventor has solved the above-mentioned problems by providing a construction method of digging and pavement demolishing after laying a lining on a pavement road surface. It has the following configuration.

That is, according to the present invention, in an underground excavation work at an intersection of a pavement road, a support pile is hit so that a pile top is higher than a road surface, and a floor plate is installed on the support pile so as not to contact the road surface. After that, the underground construction method is characterized in that excavation under a floor plate and demolition of a road surface are performed.

Further, according to the present invention, a height adjusting piece is interposed between the top end of the support pile and the lower surface of the floor plate, and the distance between the floor plate and the road surface is adjusted by the thickness of the height adjusting piece. An underground construction method is provided.

Hereinafter, the present invention will be described in detail. The support pile is used to set a floor board for vehicles to pass above the road surface at the intersection, hit the road surface with the top edge higher than the road surface, and place the floor plate on this top edge. I do.
The lower end of the support pile is driven so as to be deeper than the bottom surface after excavation. It is preferable to use H steel or the like for this support pile. The spacing between the support piles is adjusted to the shape of the floorboard. For example, when the floorboard is rectangular, it is set at a position corresponding to four corners of the floorboard. Before hitting the support stake, it is advisable to carry out earth retaining on the side of the pier.

The floorboard is an upper body that forms a road surface instead of a pavement surface, and is preferably a steel or precast concrete slab. The thickness is preferably 100 to 300 mm,
Considering handling properties, strength, etc., it is more preferably about 200 mm. The floorboards should be installed away from the pavement and this distance should be 3
It is set to be 0 to 60 mm, preferably about 50 mm. The height of the floor plate can be adjusted by interposing a height adjusting piece between the top end of the support pile and the floor plate, and adjusting the thickness of the piece. As the height adjusting piece, for example, a box-shaped body having one open side can be cited. What is necessary is to prepare a box-shaped body having a different bottom thickness, select a height-adjusting piece so as to adjust the height to a desired height, and cover the top end of the support pile.

The floor plates are fixed by bolts between the floor plates and the support pile and the floor plate, or between the height adjustment piece and the floor plate. In order to make it easier for vehicles to pass through the floorboard portion, the portion corresponding to the road surface end of the floorboard is formed as a slope and is grounded to the pavement surface.

[0013] After the supporting pile is struck and the floorboard is installed, excavation under the floorboard and demolishment of the pavement surface are performed. This operation is appropriately performed according to the type of the structure to be constructed underground. Excavation may be performed using a shield machine equipped with a self-propelled device.
In addition, the earth and sand generated by the excavation is sent to the outside by an earth and sand pumping device or the like.

[0014]

[Function] A floor plate is installed on a pavement surface and used as a road surface.
Since excavation work is performed below the road surface, work on the ground can be reduced, and excavation work can be performed without obstructing traffic flow.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. First, in the part corresponding to the side of the drill after excavation,
Driving a retaining pile (not shown). Subsequently, the support pile 1 is driven vertically into the pavement. The support pile is H steel, but may be of another shape. The spacing between the support piles 1 is appropriately set according to the size of the floorboard. The top end of the support pile 1 is 30 ~ from the road surface.
It should be about 60 mm higher.

A floor plate 2 is placed on the support pile 1. In order to adjust the height of the floorboard if necessary, cover the top end of the support pile 1 with a height adjustment piece 2 and adjust the distance between the upper surface and the road surface to be about 30 to 60 mm. The floor plate 3 is placed on the top (FIG. 2). This height adjustment piece 2
Is a box-like body having one open side, and the size of the inner surface is slightly larger than the support pile 1.

A floor plate 3 made of a rectangular steel plate is placed on the top end or the height adjusting piece of the support pile 1 so that its four corners correspond to the support pile 1 and fastened with bolts ( (Fig. 1). The floor plate 3 is a steel plate having a thickness of 200 mm, and the floor plates 3 are similarly fixed with bolts.

FIG. 3 shows an external appearance constructed at the intersection as described above. At the boundary between the paved road and the floorboard 3, the height of the support pile 1 is adjusted so that the floorboard 3 is inclined, and one end of the floorboard is installed on the road surface. By doing so, the vehicle can run smoothly.

Next, the lower part of the floor plate is excavated according to the type of the underground structure, and the pavement is demolished as necessary.

[0020]

According to the present invention, since an underground construction can be performed while securing a ground traffic path, an underground construction method capable of reducing work on the ground without obstructing traffic flow. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a method of the present invention.

FIG. 2 is a side view showing an example of the present invention.

FIG. 3 is a perspective view showing the concept of the present invention.

[Explanation of Codes] Support pile 2. Height adjustment piece 3. Floorboard 4. asphalt

Claims (2)

(57) [Claims] In an underground excavation work at an intersection of a pavement road, a support pile is driven so that a pile top is higher than a road surface, and a floor plate is placed on the support pile so as not to contact the road surface. Underground construction method characterized by performing excavation below and demolishing a road surface. 2. The underground construction method according to claim 1,
An underground construction method comprising interposing a height adjusting piece between a top end of a support pile and a lower surface of a floor plate, and adjusting a distance between the floor plate and a road surface by a thickness of the height adjusting piece.