JPS62112896A - Method of tunnel construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a tunnel construction method.

``Prior art, problems to be solved by invention'' Conventionally, working equipment and a movable trolley for carrying out waste were connected to the rear of an excavator, and after excavating a predetermined section and carrying out waste, an invert section was installed on the inner surface of the tunnel at the rear. Also known is a tunnel construction method in which concrete is rolled all over the arch, and then the tunnel is excavated again and concrete is rolled in the same way.

However, in the conventional construction method mentioned above, it is impossible to remove the waste during concrete laying, so excavation and concrete laying are performed alternately, making excavation intermittent, which delays the construction period, and Since the tunnel earth where the winding is to be erected has been excavated for a long time, there were problems such as weathering and increasing the risk of landslides.

``Means for Solving the Problems'' In order to solve the above-mentioned conventional problems, the present invention provides a bracket in which a cart on which a conventional waste removal conveyor is mounted is used as an input construction cart, and this is installed on a tunnel side wall. An invert center that can be moved up and down is loaded below the invert center, and while the excavator is digging, invert concrete is sequentially constructed using the invert center, and the center runs on rails installed on the side of the invert concrete. A construction method that allows a series of construction works to be carried out continuously by installing an arch center and pouring arch concrete in one piece, allowing the excavation and concrete rolling construction to be carried out simultaneously while removing the debris caused by excavation. This is what we would like to propose.

``Example'' 1 Below, an example of this invention shown in the drawings will be explained.
As shown in Fig. 1, while an excavator such as a reaming machine is used to excavate one by one, a waste discharge conveyor 2 connected to the rear of the excavator 1 and a plurality of sliding carts 3 loaded with various equipment are moved, and as the excavation progresses, a plurality of sliding carts 3 loaded with various equipment are moved. A plurality of sliding carts 3' for warehouses etc. each having a conveyor 4 for discharging waste continuously installed on the upper part are connected together, and brackets 5 made of steel or the like are successively installed in the excavation direction as shown in Fig. 5. .

Along with the installation of the bracket 5, as shown in FIG. The excavator 4!11 is supported so as to be freely movable by wheels or slidably by skits, and after the excavator 4!11 has excavated a required section and moved, it is pulled to the excavation al side by the extended pulling cylinder 6 and moved.

As shown in FIGS. 1 and 5, at the bottom of each invert construction trolley 7, mole rail type rails 8 are installed so as to be continuous with each other. Invert center 9 is suspended,
Moreover, it is installed in the upper part continuously with the conveyor 4 for carrying out waste or the conveyor 4 on the sliding carriage 3.

After the required number of such invert construction carts 7 are carried into the tunnel, the invert center 9 is lowered to the invert section as shown in FIG. trolley 7
While moving the invert center 9 forward in response to the advance of the invert concrete 10, invert concrete 10 is sequentially and continuously placed at both ends of the invert concrete 10 as shown in FIG. Install the rail 11 as shown.

As shown in FIG. 2, a plurality of gate-shaped support carts 12 whose both sides are supported on rails 11 so as to be freely movable are connected to the last invert construction cart 7. A waste removal conveyor 4 is installed on the upper part of these support carts 12 in series with that of the invert construction cart 7, and a waste removal hopper 13 is installed below the final end of the conveyor 4.

As shown in FIG.
A plurality of pickpocket delivery vehicles 15 and a concrete delivery vehicle 15' connected together are run on the double track, and the pickpockets discharged from the hopper 13 are sequentially loaded and carried out of the mine. Concrete for this purpose will be delivered to the installation area of each Center 9.17.

At the rear of the support truck 12, there is a rail l as shown in FIG.
A gate-shaped arch reinforcing bar assembly cart 16 and an arch center 17 that run freely on the invert concrete 10 are provided, and these are sequentially moved onto the invert concrete 10, and then the arch concrete 18 integrated therewith is poured in a series. Go.

In addition, waste removal vehicle 15 and concrete delivery vehicle 15
can freely pass under the arch reinforcing bar assembly cart 16 and the arch center 17.

"Effects of the Invention" As described above, according to the present invention, brackets are sequentially installed on the left and right side walls of an excavated tunnel along the tunnel direction, and an invert construction truck is connected to the rear of the sliding truck on the brackets. The invert center, which is movably supported on both sides and is loaded so that it can move forward and backward below the invert construction trolley and can be raised and lowered, is lowered to the invert section and poured invert concrete, simultaneously with the excavation by the excavator. This allows continuous invert concrete construction.

Then, rails are installed on both sides of the inverted concrete, and the arch center is moved while running on the rails to pour a series of arch concrete that is integrated with the inverted concrete. Concrete construction can also be carried out continuously, and in the end, concrete rolling can be carried out efficiently without interrupting excavation, making it possible to shorten the construction period and quickly rolling concrete before the ground weathers. It becomes possible to construct. In addition, the excavated waste is transported backward by a waste removal conveyor on each movable cart connected to the excavator, loaded onto a waste removal vehicle that runs on the inverted concrete that has already been created, and passed under the arch center. Concrete for arches and inverts can be carried in continuously.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of the first half showing the construction state according to the present invention, Fig. 2 is a longitudinal sectional side view of the latter half showing the construction state 7fy according to the invention, and Fig. 3 is the AA cross section of Fig. 1. Figure 4 is a B-Bltli side view of the same figure, and Figure 5 is a C-C view of Figure 2.
FIG. l...excavator, 3,3...sliding trolley, 4...conveyor for carrying out scraps, 5...fracket, 7...invert construction trolley, 9...invert center, 10...invert concrete. 11...Rail, 15...Zuri removal vehicle, 17...Arch center, 18...Arch concrete.

Claims (1)

[Claims] Brackets are sequentially installed along the excavation direction on the left and right side walls of a tunnel excavated by an excavator with a sliding truck connected to the rear, and both sides of the invert construction truck connected to the rear of the sliding truck are placed on these brackets. The invert center, which is supported movably and is loaded under the invert construction trolley so that it can move forward and backward as well as move up and down, is lowered to the invert section and poured invert concrete, and rails are installed on both sides of this invert concrete to form the arch center. A tunnel construction method characterized in that a series of arch concrete is cast integrally with invert concrete by sequentially moving the arch concrete while running on the rail.