JPH0781498B2 - How to build multiple tunnels - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a multiple tunnel constructed underground.

(Prior art) In the construction of a single-shield shield tunnel or a multi-layered tunnel such as an eyebrow type, when excavating earth and sand, moving in and out of materials for primary lining and formwork for secondary lining, etc. Equipment is required.

(Problems to be solved by the invention) However, since there is only one tunnel in a single-body shield tunnel, equipment such as carrying out earth and sand by excavation, entry and exit of materials for primary lining, and formwork for secondary lining, etc. However, there was a problem that the entire construction period was extremely long and the construction cost was also high because the construction was not possible at the same time and the secondary lining was performed after the completion of the primary lining.

In addition, even in the case of multiple tunnels with one or more tunnels, no particular consideration is given to how to put in and out the primary lining material and the equipment such as the formwork for the secondary lining, There is a problem that the secondary lining is performed after the completion of the primary lining, and the work cannot be performed efficiently, and the construction period is not shortened.

The present invention has been proposed in view of the above circumstances, and an object thereof is to significantly reduce the construction period in a multi-section shield tunnel having one or more tunnels, and as a result, reduce the construction cost. It is to provide a building method to gain.

(Means for Solving the Problem) According to the present invention, in constructing a shield tunnel having a multiple cross section having a plurality of tunnels, excavation is performed using any one or more of the segments, excavation of sand, etc. The primary lining and the secondary lining of the shield tunnel are performed by performing the primary lining and secondary lining in the remaining one or more tunnels, and by alternately performing this for each fixed length. The above-mentioned object is achieved by carrying out the work with and in parallel with each other.

(Operation) One or more multiple tunnel tunnels are used for the entry and exit of the primary lining material, and the secondary lining is constructed in parallel in the remaining other tunnels without being affected by the primary lining. The primary lining and the secondary lining can be constructed substantially in parallel by performing them alternately for each extension.

Therefore, the construction period can be significantly shortened and the construction cost can be reduced.

(Embodiment 1) FIGS. 1 (a) and 1 (b) show a first embodiment of the present invention. In this embodiment, the upper tunnel is used for the entrance and exit of the primary lining material, and the lower tunnel is used. The secondary lining is done in the tunnel. That is, in the figure, 1 is a shield machine for constructing multiple tunnels, 2 is a multiple tunnel constructed by incorporating a segment 3 as the shield machine 1 advances, and 4 is a plurality of tunnel interiors. The tunnel bulkheads 5 for partitioning and forming the tunnels 2a, 2b of the shield machine 1 discharge the excavated earth and sand in the cutting chamber 7 whose front end is connected to the lower portion of the bulkhead 6 of the shield machine 1 to the outside. For example, it is an earth discharging device such as a screw conveyor, and the earth discharging port at the rear part thereof is located in the lower tunnel 2b, and the earth discharging device such as the belt conveyor 8 and the earth and sand pump 9 is connected in series. .

Then, the excavated soil discharged from the shield machine 1 through the soil discharging device 5 is transferred to the upper tunnel 2a by the belt conveyor 8 and the earth and sand pressure pump 9 provided in the lower tunnel 2b.
It is loaded in the earth and sand bucket 10 provided inside. Then, the earth and sand bucket 10 is pulled by the battery locomotive 11, travels on the rail 12 provided in the upper tunnel 2a, and is discharged to the outside of the mine.

In this case, the segment 3 is removed at an appropriate position of the tunnel partition wall 4 to form an opening 4a serving as a communication path between the upper tunnel 2a and the lower tunnel 2b, and the earth and sand pressure feeding is performed through this opening 4a. A discharge pipe 9a from the pump 9 extends to a sediment bucket 10 provided in the upper tunnel 2a.

In addition, the segment 3 is mounted on a bogie 13 and travels from the outside of the mine along with a battery locomotive 11 and an empty earth and sand bucket 10 on a rail 12 installed in the upper tunnel 2a, and an opening 4a.
Is delivered to the front.

Then, the segment 3 is loaded into the upper segment carriage 13 'and the lower segment carriage 13 "by the traveling crane 14 provided in the upper part of the upper tunnel 2a so as to travel freely, and is transported to the shield machine 1 to be assembled. .

In this way, most of the excavation of sand and sand and the transportation of materials such as segments 3 are carried out on the upper tunnel 2a side, and the primary lining is carried out. Therefore, in the lower tunnel 2b, the transportation of excavated earth and sand behind the tunnel, The secondary lining can be performed substantially in parallel without being affected by the primary lining such as the loading of the segment 3 from the outside of the mine.

The secondary lining uses the movable formwork 15 as usual,
By placing fresh concrete or the like between the primary lining segment 3 ′ and the formwork 17 by the concrete pumping pipe 16, the secondary lining concrete is quickly placed inside the tunnel 2.
18 can be built.

Then, after the secondary lining in the lower tunnel 2b has been extended to a certain extent (for example, 100 m), part or all of the mobile formwork 15 is dismantled and removed, and the inside of the secondary lining is filled with the material for the primary lining. It is used for entrance and exit, and secondary lining is performed on the opposite upper side, and by repeating this work alternately in sequence, as shown in Fig. 1 (b), the secondary lining concrete 18 can be easily installed inside the tunnel 2. It can be installed in the, and the construction period can be significantly shortened.

In addition, in the case where the excavated earth and sand discharged like the mud type is highly fluid, the discharge pipe for discharging the earth and sand in the face chamber does not interfere with the secondary lining because it depends on the diameter of the tunnel. It is also possible to provide it in the lower tunnel 2b without providing it in the upper tunnel 2a side through the opening 4a.

(Embodiment 2) FIG. 2 shows a second embodiment of the present invention. In this embodiment, the point that the passage for the primary lining and the construction position of the secondary lining are turned upside down is the first embodiment. The same as the method of moving in and out of materials.

In addition, the same members are denoted by the same reference numerals and the description thereof will be omitted.

(Embodiment 3) FIG. 3 shows a third embodiment of the present invention, in which the rear end of the soil discharging device 5 of the shield machine 1 is raised from the lower tunnel 2b to the upper tunnel 2a, and each tunnel 2a The first and second earth discharge ports 5a and 5b are provided in the 2 and 2b portions, respectively, so that the excavated earth and sand can be put out in the upper tunnel 2a or the lower tunnel 2b in the shield machine 1 portion if necessary. It is a thing.

Then, the excavated earth and sand are discharged into the lower tunnel 2b, and as in the embodiment shown in FIG. 1, the earth and sand bucket 10, the battery locomotive 11, etc. are provided inside the upper tunnel 2a, and the upper tunnel 2a is primarily It may be used for lining, or as in the embodiment shown in FIG. 2, the lower tunnel 2b side may perform earth removal work and the upper tunnel 2a side may perform secondary lining work.

Alternatively, excavated earth and sand are discharged from the upper tunnel 2a side, and contrary to FIG. 1, the lower tunnel 2b side is provided with a rail 12, a sand and sand bucket 10 capable of traveling on the rail 12, a battery locomotive 11, etc. The material for the primary lining may be transferred from the tunnel 2b side, and the secondary lining may be performed from the upper tunnel 2a side.

Furthermore, contrary to the embodiment shown in FIG.
The soil may be discharged from the upper tunnel 2a side, the soil may be discharged directly from the upper side tunnel 2a side via the earth and sand bucket 10, and the secondary lining may be performed from the lower side tunnel 2b side.

(Embodiment 4) FIG. 4 shows a fourth embodiment of the present invention, in which the segment 3 is vertically delivered via the traveling crane 14 in the front shield machine 1 portion. Others may be performed by appropriately combining the first, second and third embodiments.

As the tunnel shape, in addition to the one shown in FIG. 1 (b), as shown in FIG. 9 and other vertical double shapes, for example, a vertical triple shape as shown in FIG. It is needless to say that, in the above-described multi-strip type as well, any one or more of the plurality of tunnel sides can be used first for the primary lining and the rest for the secondary lining.

(Embodiment 5) In each of the above-mentioned embodiments, the construction method in the vertical double or multiple double shield tunnels has been described. Hereinafter, a case where the present invention is applied to the horizontal double shield tunnel will be described.

That is, FIG. 5 shows a fifth embodiment of the present invention,
When viewed from the front end of the shield machine 1, the inside of the left side tunnel 2a 'is first used for the primary lining and the right side tunnel 2b' is used for the secondary lining, and the opening 4a provided in a part of the tunnel partition wall 4 is provided. It is characterized in that the traverser 19 which can be moved in the lateral direction is used to transfer materials, excavated soil, and the like between the left and right tunnels 2a ′, 2b ′.

It should be noted that the material passage for the primary lining and the construction of the secondary lining are performed alternately on the left and right, which is exactly the same as in the case of the vertical type, the same members are indicated by the same reference numerals, and the detailed description is to avoid duplication. Omitted in.

(Embodiment 6) FIG. 6 shows a sixth embodiment of the present invention, which is different in that the arrangement and construction of each facility and the like are reversed from those of the fifth embodiment. Others are the same.

(Embodiment 7) FIG. 7 shows a seventh embodiment of the present invention, in which a traverser 19 is provided on the shield machine 1 side and the left and right tunnels 2a ', 2
Material is appropriately delivered in b '. In the illustrated example, the soil discharging port of the soil discharging device 5 and a part of the equipment behind the soil discharging device 5 are provided on the left side tunnel 2a ′ side, but it is optional as to which side the tunnel 2a ′, 2b ′ is located. is there.

Further, in the embodiment shown in FIG. 5 to FIG. 7, the horizontal double station is shown. However, for example, as shown in FIG. Of course.

(Effect of the Invention) As described above, according to the present invention, in constructing a shield tunnel having a multi-section cross-section having a plurality of tunnels, one or more tunnels are used for entry / exit of segments, excavated earth and sand, etc. Excavation and primary lining are performed, the remaining one or more tunnels are subjected to secondary lining, and the lining and secondary lining of the shield tunnel are performed by alternating this for a certain length. Since the lining work and the lining work are performed in parallel, the construction period can be greatly shortened, and the construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a first embodiment of the present invention, FIG. 1 (a) is an explanatory view showing an example of simultaneous construction of primary and secondary linings of a vertical double shield, and FIG. Front view of the completed tunnel,
FIG. 2 shows an example of simultaneous construction of the primary and secondary linings of the vertical double shield in the second embodiment of the present invention, and FIG. 3 shows the third embodiment of the present invention in the vertical double shield machine. Explanatory diagram showing a state in which two soil discharge ports are installed on the screw conveyor,
FIG. 4 is a fourth embodiment of the present invention and is a segment transportation diagram in the vicinity of the erector in the vertical double shield machine,
Figures 6 and 6 respectively show the right side secondary lining and the left side secondary lining in the simultaneous construction method of the horizontal double shields, the fifth and sixth embodiments of the present invention, and Fig. 7 show the present invention. 7 is a segment transportation diagram near the erector in the horizontal double shield machine, FIG. 8 is a front view of other multiple horizontal tunnels, and FIGS. 9 and 10 are front views of other multiple vertical tunnels. Indicates. 1 …… Shield machine, 2 …… Tunnel 2a …… Upper tunnel, 2a ′ …… Left tunnel 2b …… Lower tunnel, 2b ′ …… Right tunnel 3 …… Segment

Continuation of front page (56) Reference JP-A-1-116191 (JP, A) JP-A-57-178095 (JP, A) JP-A-60-141993 (JP, A) JP-A-61-57799 (JP , A)

Claims (1)

[Claims] 1. In the construction of a shield tunnel having a multi-section cross section having a plurality of tunnels, most of the segments, excavation of sand and sand, etc. are subjected to a primary lining using one or more tunnels and left. In addition, the secondary lining in one or more tunnels is performed, and the secondary lining and the secondary lining of the shield tunnel are performed almost simultaneously in parallel by performing the secondary lining alternately at fixed lengths. A method of constructing multiple tunnels, characterized by being constructed in