JPS6135357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a novel invention that can be constructed by excavating and constructing a large-scale underground structure under the ground of railways, roads, etc. in a transverse direction without causing any hindrance to upper traffic. It is a great device.

In order to excavate and construct a large underground structure in a transverse direction under the ground of railways, roads, etc. without interfering with the traffic above, a separate protection work against the upper load is conventionally required. Conventional construction methods for upper load receivers include pipe roofs, construction girders, etc. in which the upper load receiver is completed separately. With such conventional construction methods, it is not possible to carry out upper load receiving and the construction of large underground structures at the same time, and the two types of construction are carried out separately, resulting in large construction costs and construction periods.
The hardships and economic losses were enormous.

The purpose of the present invention is to eliminate many of the drawbacks of conventional construction methods that are subject to top loads, and to enable construction of large-scale underground structures by excavating and constructing them underground with shallow earth cover, such as under railways and roads. The underground structure can be excavated and advanced while protecting the face and preventing the movement of the soil above the underground structure without separately constructing protection works for the upper part of the underground structure. The object of the present invention is to provide a construction device for underground structures that can shorten the construction period and save a huge amount of construction costs.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Figures 1 to 5, this is a device installed at the front of a platform girder 1, which is an underground structure that excavates (progresses forward) into the ground, and is a small cylinder with an opening at its tip. 3, a holding frame 4 that holds the same, two groups of elongated friction cutter pieces whose front parts are rigidly connected to the front part of the small cylinder cutting edge 3, and the small cylinder cutting edge 3. It consists of advance equipment.

The tips of the small cylinder blades 3 are placed in parallel with each other, with the tips thereof coming out in front of the tips of the holding frame 4, and being slidably inserted into the holding frame 4.

It is conceivable to use a propulsion jack, a traction jack, etc. as the advancing equipment, but in this embodiment, the propulsion jack 6 is used and it is connected to each small cylinder blade opening.
3 was disposed within the holding frame 4 at the rear end thereof.

Next, the usage and operation will be explained in the case of constructing a large, low-height slat girder in the ground with shallow earth cover. The rigidly connected friction pieces 2 are moved forward together with the excavation several meters in front of the holding frame 4 by inputting or using a machine to remove earth and sand from the tip opening surface, and after finishing, the plate-like girder 1 and The holding frame 4 is advanced by one process length using a conventional method such as a propulsion method or a towing method.

Thereafter, the three groups of small cylindrical cutting edges and the two groups of friction cutter pieces rigidly connected thereto are sequentially excavated and advanced one by one, and the plate-like girder 1 and the holding frame are advanced by one process length, which are alternately repeated. Advance it to the designated position.

In this way, the small cylinder blade opening 3 has a small cross section, and the front part is supported by penetrating into the ground in advance, and the rear part is held by the holding frame, so that the upper load can be supported and protected. Further, when the small cylindrical body cutting edge 3 having a small cross section moves forward in excavation, the face does not collapse and it is safe. The width of the friction cutter pieces 2 welded to the front part of the small cylinder cutting edge 3 is narrow, and each piece is moved forward together with each small cylinder cutting edge 3, so when the friction cutter pieces 2 move forward, the friction cutter pieces 2 The soil on the top of the cutter piece 2 does not move laterally, and the edge between the top of the plate girder 1 and the soil is cut by the friction cutter piece 2, so when the plate girder 1 moves forward, the soil on the top of the plate girder 1 moves horizontally. It is safe because the soil does not move. Furthermore, the peripheral frictional resistance force required for the advance of the plate-shaped girder 1 and the holding frame 4 is reduced because the upper part is covered with the friction cutter piece 2, and the 3 groups of small cylindrical cutting edges are moved forward for excavation. Therefore, the plate-shaped girder 1 and the holding frame 4 can be moved forward with a small force (because the cutting edge penetration resistance force is unnecessary). Frixion cutter piece 2
Since the advancing device also uses the propelling jack 6 disposed at the rear end of the small cylinder cutting edge 3 to advance it, a dedicated advancing device for the friction cutter piece 2 is not required unlike other methods.

As another example, as shown in FIG. 6, when a box 1' is used as a large-scale underground structure to be dug underground, a small cylindrical cutter opening 3 in a portal shape is provided at the front of the box 1'. A holding cylinder 5 is used as a holding frame. This embodiment is effective when the upper stratum of the cross section of a large box excavation is of collapsible soil quality.

Furthermore, as another example, as shown in FIG. 7, the three groups of small cylinder cutting holes and the five groups of holding cylinders that hold the three groups of small cylinder cutting holes may be arranged in a box shape instead of a gate shape. good.

In this example, even if the cross-sectional shape of the box is different, by changing the width or height of several small cylinder cutting holes and the holding cylinder, the small cylinder cutting opening can be adjusted to match the width and height of the box. Since it is possible to arrange the group of small cylinders and the group of holding cylinders, and also to be able to adjust the thickness of the floor plate and wall of the case, most of the small cylinder blade group and the holding cylinder group can be reused, and the structure is simple. Because of this, it is easy to assemble, disassemble, and transport, making it even more economical.

As described above, the underground structure construction apparatus of the present invention performs protection work for the underground structure to be dug underground at the same time as the underground structure is excavated, without having to construct it in advance as in conventional construction methods. This is an epoch-making device that can reliably construct large-scale underground structures quickly and cheaply. In particular, when constructing a plate girder using the device of the present invention, the construction of the plate girder 1 as shown in Fig. Later, the abutments 7, piers, etc. of the platform girder can be constructed safely and quickly in the lower ground protected by the platform girder, and the platform girder can also be constructed after the abutments, piers, etc. have been constructed in advance. When constructing under an embankment, make a slab girder on top of abutments, piers, etc.
This is a useful tool that can be used in a wide range of applications, allowing the construction of large underground passages by alternately repeating excavation of abutments, piers, etc. and excavation of slab girders.

Although the apparatus of the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to these embodiments, and various modifications of the design may be made without departing from the spirit of the present invention. It's watery.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the device of the present invention, and FIG.
3 and 3 are side views showing the process of using the device shown in FIG. FIG. 7 is a front view showing another embodiment of the invention, and FIG. 8 is a front view showing an application of the invention. 1... Plate-shaped girder, 1'... Box, 2... Friction cutter piece, 3... Small cylinder cutting edge, 4... Holding frame, 5... Holding tube, 6... Propulsion jack, 7 …
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Claims (1)

[Claims] 1. A device installed at the front of an underground structure for advancing underground excavation, which includes a holding frame and a group of small cylindrical blades that protrude from the front and have an opening at the tip. An underground structure construction device comprising: a group of elongated friction cutter pieces whose front portions are rigidly connected to the front portions of each of the small cylindrical blades; and a mechanism for propelling or pulling the small cylindrical blades. .