JPS63110399A - Method and device for carrying in material of tunnel excavation - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for transporting materials such as segments to a segment assembly point in a tunnel mainly by pneumatic pressure during excavation of a shield tunnel.

[Traditional technique]

The conventional method for bringing in materials of this type is to hang materials such as segments on a shaft using a hoist, lower them to the bottom of the shaft, place the materials on a cart pulled by a buff terry car, and then install the buff terry car and cart into the tunnel. There is a method of transporting materials to the segment assembly point by running them on rails.

[Problems to be solved by this invention]

However, in the case of such conventional material delivery methods,
There are various problems as follows.

(i) A worker who has been waiting below the shaft to place the materials suspended by a hoist, etc., onto a trolley while communicating with the hoist operator above the shaft. There is a difference in height, and it takes a long time to put it on the trolley.

(ii) During the above-mentioned work, there is a high risk that materials will fall, leading to serious accidents including personal injury.

(iii) Depending on the site, materials may be temporarily stored before being placed on a trolley, and in this case, the number of man-hours and personnel will inevitably increase.

(iv) When carrying materials into the tunnel using a battery car and a trolley, a battery car operator is required.

(ν) During transport, collisions with pedestrians in tunnels and battery car derailment accidents are expected.

(vi) Rails and rail support materials are required for the battery car to run, and of course it takes a lot of man-hours to transport and install them.

This invention was proposed to solve these problems, and its purpose is to transport materials safely and quickly.
Furthermore, it is an object of the present invention to provide a method and apparatus for carrying in materials in tunnel excavation, which can save labor and reduce costs.

[Means/effects for solving the problem] The method for carrying in materials according to the present invention extends the capsule transport conduit as the horizontal shaft is excavated, loads the materials into the capsules at the upper part of the shaft, and After being transported to the bottom of the shaft, the material-loaded capsules are pneumatically transferred to the starting end of the capsule transportation pipeline, and the main blower's air pressure is used to push the capsule transportation pipeline to the tip of the horizontal section, where the unloaded capsules are transported. The air pressure of the main blower is used to transport materials such as segments to the shaft and to the loading area at the top of the shaft, allowing materials such as segments to be safely and quickly transported to the tip of the horizontal shaft.

Furthermore, the main blower may be installed on either the shaft side or the excavation side, or may be installed on both the shaft side and the excavation side.

Further, it is also possible to provide an unnecessary material loading section on the excavation side and an unnecessary material unloading section at the upper part of the shaft, so that materials can be loaded into the capsule after unloading and carried out.

Next, the material carrying device according to the present invention includes a vertical conveyor that can move the capsules up and down, in which a plurality of gondolas that can load capsules are attached to a conveyor that is arranged in an endless manner from the top of the shaft to the bottom of the shaft; A capsule transport pipeline that is extended as the horizontal shaft is excavated into an existing horizontal shaft, through which the capsules can pass; and a capsule transport pipeline that pneumatically transports the material-loaded capsules in the gondola of the vertical conveyor. A capsule that can be transferred to the starting end of the tunnel and pushed through the capsule transportation pipeline to the tip of the horizontal shaft using air pressure, and the empty capsule at the tip of the horizontal hole can be returned to the vertical shaft by air suction and inserted into the empty gondola of the vertical conveyor. It consists of a take-off and landing device, and is designed to safely and quickly transport capsules loaded with materials and retrieve empty capsules.

〔Example〕

The present invention will be described below based on an illustrated embodiment.

As shown in Figures 1 and 2, a vertical conveyor 2 is installed inside the shaft 1.
In addition to installing a capsule arrival and departure device 3, a capsule transportation pipeline 5 is installed in the existing horizontal shaft 4, and as the horizontal shaft 4 is excavated, the capsule transportation pipeline 5 is extended.
Materials such as segments are loaded into the capsule 6 at the top of the shaft 1, and the material-loaded capsule 6 is transported to the bottom of the shaft 1 by the vertical conveyor 2. The capsule 6 is transferred to the starting end using pneumatic pressure and is also pushed through the capsule transport conduit 5 using pneumatic pressure to carry the capsule 6 up to the front of the segment assembly device 7.

The capsule transport conduit 5 is constructed by connecting unit short pipes,
The capsule 6 also transports this unit short tube, inserts and connects the carried unit short tube to the front of the unloading section 8, and extends the capsule transportation conduit 5.

The empty capsule 6' loaded with materials is sucked back by the capsule loading/unloading device 3, transferred to the upper part of the shaft 1 by the vertical conveyor 2, and is loaded with materials. Materials will be brought in.

As shown in FIG. 3, the vertical conveyance a2 is of a Ferris wheel type, and is a chain conveyor 9 disposed vertically within the shaft 1.
and a gondola 10 that can accommodate the capsule 6. The chain conveyor 9 consists of a sprocket 9A installed at the top of the shaft 1, a pair of sprockets 9B installed at the bottom of the shaft 1, and a chain 9C wound endlessly around these sprockets. lO
are attached via connecting members 11.

The gondola 10 has an upper portion pivoted to the tip of the connecting member 11 so that it can maintain a horizontal state at all times, and has an upper lid on the upper portion and is open on the front and rear surfaces. Furthermore, the structure covers the capsule 6 except for the opening, so there is no fear of materials falling.

Further, the lower part of the chain conveyor 9 is widened by a pair of sprockets 9B, so that the gondola 10 can be positioned in front of a launch zone 12 and an arrival zone 13 of a capsule landing and landing device 3, which will be described later.

As shown in FIG. 2, the capsule landing and departure device 3 includes a main valve V1, a zone switching device 14, a launch zone 12, an arrival zone 13, and zone valves V, V.

Sub blower 15, main blower 16, blower discharge side valve 1) IxI)! , valves S, ~S, etc. on the blower suction side.

The sub-blower 15 transports the material loading capsule 6 in the gondola 10 into the launch zone 12 or the arrival zone 1.
3 is provided for inserting the empty capsule 6' into the empty gondola 10.

The main blower 16 has valves ■1 to ■, as will be explained in detail later.
1, D, ~D1, and sl~s, the material-loaded capsules 6 are pushed in on the discharge side, and the empty capsules 6' are suctioned out on the suction side.

As shown in FIG. 4, the capsule transport conduit 5 is installed at the bottom of the existing horizontal shaft 4 via a support frame 17, and has a rectangular cross section. The reason why the rectangular shape is made is to allow the unit short tube 5A shown in FIG. 5 to pass through, and the cross-sectional dimensions and length of the unit short tube 5A are as shown in FIGS. 9 and 10. , so that it can be accommodated in the capsule 6. Further, an engaging member 5 is provided at one end of the unit short pipe 5A.
B is provided protrudingly so that joints can be easily added.

As shown in FIGS. 11 and 12, the capsule 6 is a rectangular parallelepiped container with a rectangular cross section and an open top, and includes, for example, one or two segment short unit tubes 5A and two support frames 17. It is said to be large enough to store.

A pressure receiving plate 18 is provided on the front and rear surfaces of the capsule 6 so that the capsule 6 can be propelled by a pressure difference between the front and rear surfaces, and the pressure receiving plate 18 has a pair of main wheels 19, a pair of guide wheels 20. A II street appliance 21 is provided. Also, the sides and bottom are frame 2
2, and a board (not shown) is attached to prevent materials from falling. Incidentally, a segment receiver 23 and a segment receiver 24 are attached to the front and rear of the inside of the capsule, which uses the segment receiver as an opening.

In the above configuration, materials are carried in and empty capsules are returned in a sequential order.

(i) At the loading area on the ground, the top cover of the gondola 10 is opened, materials such as segments are loaded into the empty capsule 6', and the top cover of the gondola 10 is closed. The chain conveyor 9 moves in the direction of the arrow in FIG.
be moved to the loading area.

When the material loading capsule 6 comes to a position corresponding to the firing zone 12, the capsule 6 is sent into the firing zone 12 by the air discharged from the sub-blower 15. Thus, launch zone 1
2, one to several capsules 6 are sent to it, and it becomes a standby state.

('ii) Hereafter, by switching the valves as shown in the following table, the first
Capsule handling is performed as shown in Figure 3.

Valve status (0: open, S: closed, -: optional) Capsules (group) that have been unloaded in the state shown in Figure 13 (a)
When the capsules 6 are completely settled in the arrival zone 13, the switching device 14 switches to the firing zone 12, the air discharged from the main blower 16 is blown into the firing zone 12, and the capsules 6 (group) that were in the standby state are fired ( Valvular Bk, Fig. 13 (see bl).

When the capsule 6 completely passes through the switching device 14, the valve state changes to B (see FIG. 13(C)), and the capsule 6 is conveyed to the unloading section 8 on the excavation side by being pushed by air pressure.

(iii) As shown in FIG. 14, the unloading section 8 has a trough 25. It consists of an unloader 26 and a stopper 27, and when the capsule 6 arrives, the unloader 26 unloads materials such as segments.

During this time, the main blower 16 may be in a standby state (the discharge side is fully closed in the case of a centrifugal blower, and the discharge side is fully open in the case of a positive displacement blower), or the valve state may be set to B to send air. By pumping in air, you can eliminate the need for ventilation equipment.

(iv) When the unloading is completed, the empty capsule 6' is pushed into the pipe end by the unloader 26 or the self-propelled stopper 27, the valve state is set to C or D, and the empty capsule 6' is pushed into the shaft 1 by the suction of the main proar 16. (See Figure 13(d)).

If one person inserts the unit short pipe 5A, insert and connect it after returning it.

If there are still empty capsules remaining in the arrival zone 13, the switching device 14 is on the launch side and the valve is in the C position,
When the arrival zone 13 is empty, the switching device 14 is switched to the arrival side, the valve is in the state D, and the empty capsule 6' is inserted into the arrival zone 13.

(v) When the empty gondola 10 is located on the arrival side, the empty capsule 6' stored in the arrival zone 13
It is sent into the gondola 10 by the suction force of 5, and is transported to the loading area on the ground by the chain conveyor 9.

Under normal operating conditions, the horizontal air capsule transport part (
Steps ii) to (iv) are performed continuously, and steps (i) and (v) are repeated so that the vertical conveyor section matches this.

When the construction is completed, the unit short pipes 5A are removed from the tip side and sent back in capsule form, and the unnecessary parts of the support frame 17 are then removed.

Further, in the present invention, since there are no rails or rule supports, secondary lining work can be easily performed behind the shield excavation.

The above description assumes that the main blower is placed in the shaft section, and the capsules are carried in on the discharge side, and the capsules are taken out on the suction side. It is also possible to carry the capsules in and carry them out on the discharge side, or it is also possible to place main blowers on both sides of the shaft part and the shield excavation part and carry out capsule carrying and carrying out with each blower.

In addition, in the same configuration as the present invention, the loading section and the unloading section are installed oppositely (the unloading section is at the top of the shaft, and the loading section is at the shield excavation section) to remove unnecessary materials (such as shear) caused by excavation. By installing a material loading device and an unloading device for unnecessary materials at the top of the shaft, and a material unloading device and an unnecessary material loading device in the shield excavation section, it is possible to carry in and remove unnecessary materials. It is also possible to carry out items. Next, a specific example will be explained. This is an example applied to a shield tunnel with an outer diameter of 14 m, and each specification is as follows.

(i) Segment specifications (13 divisions) Outer diameter 14m Width 0.6m Width 1.2m Length 3.6m Weight 6700kg (ii) Capsule specifications Table 1 Capsule loading area dimensions Capsule weight: 1600 (kg) Capsule Pressure-receiving area: 1.34 Cn () Capsule leakage rate*: 0.0236 *The amount of air flowing through the capsule is divided by the cross-sectional area of the pipe line to obtain the apparent air velocity, and this is the differential pressure before and after the capsule. The quantity made dimensionless using is called the leakage rate.

Capsule rolling resistance number: o, oi.

(iii) Pipe specifications Pipe long side inner dimension: 1.39 (m) Pipe short side inner dimension: 1.01 (m) Unit short pipe length: 0.6 (m) (Effective length) Pipe Length: 2.3 (km) Based on the above specifications, what is required to excavate one ring is: 13 segments (13 capsules), 2 unit short pipes, 2 frames (1 capsule), etc. of materials (1 capsule), and 15 capsules are required.

On the other hand, the digging speed was set to 8 rings/day (9.6 m/d
ay), it is necessary to transport one ring of materials in three hours. In other words, the required transportation amount is 5 cars/h.

When transported in units of 5 cars, one cycle takes 60 minutes, and taking into consideration handling margins, the running time becomes 50 minutes.

If a blower is selected based on such running time, the specifications will be as shown in Table 2.

Table 2 Blower Specification Example On Line A, which is 2.3 km completely horizontal, the capsule speed is 1.37 m/s at the time of loading and 1.79+m/s at the time of discharge.

2,31u with a 4% downward slope of 1k111 on the loading side
On line B of n, the arrival speed is 1.11 m/s, IM
The speed is 4.11 m/s at the entrance slope and 1.87 m/s at the fjt exit horizontal section.

If you want to shorten the travel time, for example, set the maximum speed of the capsule to 5 m/s and set the speed in the 200 m section on the arrival side to 1.
．． It is assumed to be 5 m/s. The running time for this time is 553 seconds one way, 1107 seconds (18.4 minutes) round trip, 28.4 minutes per cycle, and a total of 85.
It will be 3 minutes.

The blower in this case has a wind ffi of 400 tri/m
Use more than in.

〔Effect of the invention〕

As described above, according to the present invention, capsules loaded with materials or empty capsules are conveyed vertically in a shaft, and the capsules loaded with materials are transported or the empty capsules are returned by air capsule transportation linked to this vertical conveyance. Due to this configuration, the following effects are achieved.

(i) Hoist operators and workers under the shaft are no longer required, saving labor and eliminating accidents caused by falling materials.

(ii) Temporary materials storage under the shaft becomes unnecessary.

(iii) Accidents during material transport using conventional battery cars and trolleys are eliminated, and safety can be improved.

(iv) Battery car operating personnel become unnecessary. Furthermore, there is no need for rails or rail receiving materials, and there is no need for workers to carry them in, resulting in labor savings.

(v) Since the speed can be increased, transportation can be carried out in a short time.

(vi) Air can be introduced and discharged, eliminating the need for construction ventilation equipment.

(vii) From the above, it is possible to reduce the cost of bringing in materials.

(viii) Since there are no rails or rail supports, secondary lining work can be easily carried out behind the shield excavation.

(j×) It is possible to load unnecessary items such as pickpockets into empty capsules and transport them.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and a plan view showing the cost of carrying in materials according to the present invention, Figure 3 is a front view showing a vertical feeder, and Figure 4 is a diagram showing the installation state of a pipeline for transporting capsules. 5 is a perspective view showing the unit short tube, FIG. 6 is a perspective view showing the bottom of the unit short tube, and FIGS. 7 and 8 are side views of the unit short tube placed on a stand. Figures 9 and 10 are plan views and side views showing how unit short tubes are loaded into the capsule, Figures 11 and 12 are perspective views, front views, and Figure 13 showing the capsule. (al ~ (81 is a schematic diagram showing the status of capsule arrival and departure in order, and Figure 14 is a schematic diagram showing the unloading section. 1 ~ - ~ - - Vertical shaft, 2 - Vertical Tono transport machine,
3-...-Capsule departure/arrival WE, 4-...-Horizontal shaft, 5-
...-Capsule transport conduit, 5A...-1111 unit short pipe, 5B--Engaging member, 6----1-capsule, 6 electric--1111 empty Capsule, 7.--Segment assembly device, 8--Unloading section, 9.--1.
Chain conveyor, 9A, 913--sprocket,
9 C---------Chain, i o---------
-Gondola, 11--1--・-Connection member, 12--
...Launch zone, 13--Arrival zone, 14
--------Zone switching device, 1'5...-Sub blower, 16-...-Main blower, 17-...-
・Support frame, i 5----...Pressure plate, 19-...-
Main wheel, 20--Guide wheel, 21--Buffer, 22--1--Frame, 23--Segment support, 24--Segment support frame , 25
−−−−−−1 trough, 26−・−・−unloader, 2
7.--stopper, 28-.--loading section. Figure 9 1012I Figure 14

Claims (7)

[Claims] (1) In tunnel excavation in which a horizontal shaft is excavated from the bottom of a shaft, materials are brought into the tip of the horizontal shaft being excavated, and the capsule transport conduit is extended as the horizontal shaft is excavated. After loading materials into capsules at the top of the shaft and transporting them to the bottom of the shaft, the material-laden capsules are transferred to the starting end of the capsule transportation pipeline using air pressure, and the inside of the capsule transportation pipeline is moved using the air pressure of the main blower. A method for transporting materials for tunnel excavation, characterized by pushing the capsules to the tip of a horizontal shaft, carrying the unloaded capsules to the shaft using air pressure from a main blower, and transferring them to a loading section at the top of the shaft. (2) A method for transporting materials for tunnel excavation according to claim 1, characterized in that a main blower is installed on the shaft side, the capsules are pushed in on the discharge side, and the capsules are sucked out on the suction side. . (3) A method for transporting materials for tunnel excavation according to claim 1, characterized in that a main blower is installed on the excavation side, the suction side carries in the capsules, and the discharge side pushes the capsules out. . (4) The method for transporting materials for tunnel excavation according to claim 1, characterized in that main blowers are installed on both the shaft side and the excavation side. (5) An unnecessary material loading section is provided on the excavation side, and an unnecessary material unloading section is provided at the upper part of the shaft, and the unnecessary material is loaded into the capsule and carried out.Claims 2 and 3 4. Method of transporting materials for tunnel excavation as described in Section 4. (6) A plurality of gondolas capable of loading capsules are attached to a conveyor arranged endlessly from the top of the shaft to the bottom of the shaft, a vertical conveyor capable of raising and lowering the capsules, and excavation of a horizontal shaft within an existing horizontal shaft. A capsule transportation pipeline is extended along with the capsule transportation, through which the capsules can pass, and the material-loaded capsules in the gondola of the vertical conveyor are pneumatically transferred to the starting end of the capsule transportation pipeline, and the capsules are transported by pneumatic pressure. It is characterized by comprising a capsule loading and unloading device that can push the capsule through the transportation pipeline to the tip of the horizontal shaft, return the empty capsule at the tip of the horizontal shaft to the vertical shaft by air suction, and insert it into the empty gondola of the vertical conveyor. Equipment for transporting materials for tunnel excavation. (7) Claims characterized in that the capsule landing/departing device has a main blower for pushing and suctioning the capsule, a sub-blower for taking the capsule in and out of the gondola, a launch zone, an arrival zone, and a zone switching device. The material carrying device for tunnel excavation described in paragraph 3.