JPH06167191A - Tunnel construction device - Google Patents

Abstract

PURPOSE:To make it possible to excavate mainly the whole rectangular section efficiently without leaving a portion of non-excavation by arranging cutting devices to the inside of a cylindrical body forming a line symmetrical figure with a shaft at an approximate right angle in the direction of the excavation to a direction at an approximate right angle in the direction of the excavation in a turnable manner. CONSTITUTION:When a cutting device driving motor 8 is driven, a rotary drum 4 is rotated, and a bedrock is excavated by cutting bits 6. At that time, if necessary, a viscosity given material is injected to excavated earth from a viscosity given material injection hole provided to the peripheral surface of the rotary drum 4, and it is so mixed with the excavated earth by cutting bit bearing members 19 or ribbon-like screw blades 20, etc., that plastic fluidity can be obtained. And, at the same time, a shield jack 15 is driven to push a cylindrical body 1 to make earth pressure generate, at the same time, the earth pressure is detected by an earth pressure gauge provided to a partition wall 1a, and a tunnel is constructed while controlling speed of an earth-moving screw conveyer 13 or speed of the shield jack 15 so that earth pressure becomes constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal shaft digging apparatus capable of constructing a horizontal shaft having an arbitrary cut section.

[0002]

2. Description of the Related Art Conventionally, for example, as a method for excavating a rectangular cross section, a method of forming a rectangular cross section cylinder and manually excavating the natural ground to construct a side pit, or a method of excavating a parallel cross section in the rectangular cross section cylinder There is a means of constructing a side shaft with a device having a single or a plurality of excavating tools with a rotating shaft of excavating tools.

[0003]

However, in the former means for excavating manually, it is necessary to use an auxiliary construction method (air pressure, ground improvement) together in the case of abundant soil quality of groundwater, which is high in construction cost and dangerous. There are drawbacks. On the other hand, in the latter excavator, the cross section cut by the excavator becomes circular, and the corners of the rectangular cross section remain as unexcavated parts, and it is not possible to proceed with hard ground.
Further, there is a drawback that the rotary excavation mechanism becomes complicated if the unexcavated portion is reduced.

The present invention has been made in order to solve such a problem, and an object of the present invention is to mainly excavate a rectangular cross section efficiently without leaving an unexcavated portion. It is to provide a building device.

[0005]

In order to achieve the above-mentioned object, the present invention provides a cylindrical body (1) which is a line-symmetrical figure with respect to an axis (a) which is substantially perpendicular to the excavation direction, and Cutting that is provided in the cylindrical body (1) and extends substantially horizontally from the central portion to both sides with respect to the excavation direction and that rotates around a rotating shaft (a '') that retreats at an angle. And a tool (2).

[0006] Further, a cylindrical body (1) which is a line symmetrical figure with respect to an axis (a) which is substantially perpendicular to the excavation direction, and a cylindrical body (1) which is provided in the cylindrical body (1) and which is in the excavation direction. A cutting tool (2) rotatably arranged in a direction that forms a substantially right-angled direction, and a cutting member of the cutting tool (2) has a rotary drum (i.e., a substantially right-angled direction). 4) and a ribbon-shaped screw blade provided on the outer circumference thereof and provided with a cutting bit (6) on the outer circumference.

The cutting member of the cutting tool (2) comprises a rotary drum (4) arranged in a direction substantially perpendicular to the excavation direction, and a cutting bit (6) provided on the outer circumference of the rotary drum (4). A notched screw blade having a mixing blade provided in the axial direction of the rotary drum (4) is provided.

The rotary drum (4) having the notched screw blades and the mixing blades is divided into two parts on the left and right, and at the center of the rotary drum (4), there is a Kattus pork having a shaft extending in the excavation direction as a rotary shaft and a bit at the tip. A central cutting tool is provided.

Further, it is rotated in a direction substantially perpendicular to the excavation direction, which is provided in a cylindrical body (1) which is a line-symmetrical figure with respect to an axis (a) which is substantially perpendicular to the excavation direction. A rotary drum (4) having notched screw blades and a mixing blade, which constitute a cutting member of a cutting tool (2) that is movably arranged, is provided in two upper and lower stages, and the inside of the notched screw blade is It is characterized in that it is provided so as to contact.

Furthermore, the upper and lower cut-out screw blades are alternately provided.

[0011]

With the above construction, in the present invention, when excavating, when the cutting tool drive motor 8 is driven, the rotary drum 4 rotates and the cutting bit 6 excavates the natural ground. At this time, the viscosity imparting material is injected from the viscosity imparting material injecting hole 10 into the earth and sand excavated at this time, so that the cutting bit support member 19 and the ribbon screw blade 2 are provided so as to obtain plastic fluidity.
0, or knead with the mixing blades 26, 30 and the like.
At the same time, the shield jack 15 is driven to press the tubular body 1 to generate earth pressure, and the earth pressure is detected by an earth pressure gauge (not shown) attached to the partition wall 1a so that the earth pressure becomes constant. The horizontal shaft is constructed by adjusting the rotation speed of the soil discharging screw conveyor 13 and the speed of the shield jack 15.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of the present invention. In the drawings, reference numeral 1 is a cylindrical body such as a shield cylinder, and a partition wall 1a having a substantially semicircular cross section is provided at a front portion thereof. The cylindrical body 1 is formed in a cross-sectional shape that is a line-symmetrical figure when viewed from the front with respect to an axis a that extends in a direction substantially perpendicular to the excavation direction in a direction substantially horizontal. If it is, it has a substantially oblong rectangular shape.

Reference numeral 2 denotes a cutting tool provided in the face face chamber 3 in front of the cylindrical body 1, which is rotatably arranged in a direction substantially perpendicular to the excavation direction. The cutting tool 2 has a rotating drum 4 having a substantially cylindrical shape that is rotatable, and a cutting bit supporting member 19 having a substantially rod shape radially protruding from the outer circumference of the rotating drum 4 and a cutting bit at an outer end portion. Ribbon-shaped screw blades 20 provided with 6 are provided. The rotary drum 4 is rotatably arranged in a direction substantially perpendicular to the excavation direction, and the rotation axis that is the center of rotation thereof overlaps the axis a in this embodiment.

In the center of the rotary drum 4 of the cutting tool 2, a fixed shaft 7 whose both ends are fixed to the side wall 1b of the cylindrical body 1 is penetrated, and the fixed shaft 7 is placed at an appropriate position. An appropriate number of cutting tool drive motors 8 are attached, and the rotating portion of the cutting tool drive motor 8 is connected to the inner peripheral wall of the rotary drum 4 so that the rotary drum 4, and thus the cutting tool 2, can rotate. .

That is, the cutting tool drive motor 8 has a structure in which the main body itself rotates around the fixed shaft 7, such as a hegrand motor, and is inserted into the power transmission hole 9 provided in the fixed shaft 7. The power source is transmitted to the drive motor 8 via the provided energy supply means.

A viscosity imparting material injection hole 10 is provided on the outer peripheral portion of the rotary drum 4, and the viscosity imparting material injection hole 10 is provided.
Is connected to a viscosity-imparting material supply means (not shown) so that the viscosity-imparting material can be injected into the ground or excavated soil. Reference numeral 11 denotes an earth removing device having a front end connected to the lower central portion of the partition wall 1a and communicating with the face chamber 3, and the earth removing device 11 has a cylindrical shape and is a casing arranged so as to rise rearward. 12, a screw conveyor 13 rotatably provided in the casing 12, and a drive motor 14 attached to the rear end of the casing 12 for driving the screw conveyor 13.

Reference numeral 15 is a shield jack for propelling the shield machine main body, 16 is a reaction force receiver provided at the rear thereof, 17 is a tail seal provided at the rear portion of the cylindrical body, and 18 is a side shaft as the shield machine main body is propelled. It is a segment that has been assembled in order to build.

In excavation, when the cutting tool drive motor 8 is driven, the rotary drum 4 rotates, so that the cutting bit 6
The ground is excavated by. If necessary, a viscosity imparting material is injected into the earth and sand excavated by the cutting tool 2 from the viscosity imparting material injection hole 10 and kneaded with the cutting bit support member 19 and the ribbon-shaped screw blade 20 so as to obtain plastic fluidity. . At the same time, the shield jack 15 is driven to drive the cylindrical body 1.
Is pressed to generate earth pressure, and an earth pressure gauge (not shown) attached to the partition wall 1a detects the earth pressure, so that the earth pressure becomes constant and the rotation speed of the earth discharging screw conveyor 13 and the shield jack. It adjusts the speed of 15 and builds a side pit.

5 to 10 show a second embodiment of the present invention. This example is for excavating a rectangular cross section,
The cutting tool is composed of a main cutting tool 2A and a central cutting tool 24, and the main cutting tool 2A has a notched screw conveyor structure divided into two parts on the left and right. In addition, in the central part,
A central cutting tool 24 having a center shaft 21 extending in the direction of excavation as a rotation axis and cross-shaped cutter spokes 23 provided with a cutter bit 22 at the tip thereof.
Is provided.

That is, the notched screw blades 25A, 25B are spirally arranged on the outer circumference of each of the rotary drums 4A, 4B to form a notched screw conveyor, and the notched screw blades 25A, 25B are provided on the outer peripheral portions thereof. Cutting bits 6 are provided respectively. In this case, the inclination of each of the spiral cut-out screw blades 25A and 25B is provided so as to guide the excavated soil to the soil discharging device 11 provided in the lower central portion. In addition, each notch screw blade 25A,
25B is provided with kneading blades 26 extending along the axial direction of the rotating drums 4A and 4B, respectively, to further enhance the kneading effect by the notched screw conveyor.

In this embodiment, the drive part of the notched screw conveyor is provided at the center of the shield machine, and the rotary drums 4A and 4B mesh with the gears provided on the motor shaft of the notched screw drive motor 27. In order to rotate the rotary drums 4A and 4B having the notched screw blades 25A and 25B through the swivel gear 28 provided on the inner peripheral portion of the notched screw blades 25A and 25B,
The rotary drums 4A and 4B having the above are separated from each other at the center at the left and right, and are configured to be driven by respective notch screw drive motors 27 provided in the support member 40 on the center side.

Therefore, since the central portion of the shield machine cannot be excavated, the fishtail-shaped central bit 29, the cutter bit 22, the cutter spoke 23, and the kneading provided behind the cutter spoke 23 projecting forward from the notched screw conveyor. A central cutting tool 24 including a wing 30 and the like is provided to cover the unexcavated central portion and excavate the entire rectangular cross section.

Therefore, the central bit 29 is provided on the rotating shaft, that is, the tip portion of the center shaft 21, and at this portion, the central bit 29 is provided in the center portion of the center shaft 21 so as to extend along the axial direction thereof, and at the tip portion. A viscosity-imparting material injection hole 21a that is opened is provided. Further, a swivel joint connected to a viscosity imparting material injecting means (not shown) is provided at the rear end of the center shaft 21, and the viscosity imparting material is injected through these through a joint.

Further, a supporting member 1c is appropriately provided in the cylindrical body 1, and the center shaft 21 is rotatably supported by a center shaft supporting member 31 provided on the supporting member 1c. That is, behind the center shaft 21, there is provided a reduction gear 34 that meshes with a pinion 33 attached to the motor shaft of the drive motor 32.
The rotational force of the drive motor 32 is transmitted to the center shaft 2
1, by extension, the central cutting tool 24 rotates.

In this embodiment, the cylindrical body 1 is formed in a shape that is axisymmetric with respect to an axis a (common to the rotation axes of the rotary drums 4A and 4B) that is substantially perpendicular to the excavation direction. There is. Also, the rotary drums 4A, 4A of the main cutting tool 2A
B rotates about a rotation axis that is substantially perpendicular to the excavation direction.

In addition, in the figure, numeral 35 is an erector, and numeral 36 is a support member which is provided in the recess of the outer end portion of each rotary drum 4A, 4B and rotatably supports each rotary drum 4A, 4B. It is projected on the center of the inner wall of the side part of. Further, 37 is the outer periphery of the support member 36 and the rotary drums 4A, 4A.
A seal provided between the support portion of B and 38 is a bearing. A seal 39 is provided in the central part of the shield machine and is provided on the outer periphery of a support part 40 that supports the inner ends of the rotary drums 4A and 4B. The other structure is similar to that of the first embodiment.

The excavated earth and sand is used as a viscosity imparting material injection hole 1
In order to obtain plastic flowability by injecting a viscosity imparting material from 0, 21a, a notched screw conveyor and a kneading blade 2
6, the face of the face is filled with pressure, the earth pressure is measured by an earth pressure gauge (not shown), and the rotation speed of the earth removing device 11 and the speed of the shield jack 15 are adjusted so that the earth pressure becomes constant. It is to adjust and build a side pit.

FIGS. 11 to 14 show a third embodiment of the present invention. In this embodiment, the rotatable notch screw conveyors in the second embodiment are arranged in upper and lower portions, respectively.
The main feature is that the steps are arranged so as to be in contact with each other. In this case, the cylindrical body 1 is also slightly elongated in association with it, so that the length of the cutter spoke 23 is also correspondingly increased. Further, the partition wall 1a also has two upper and lower notched screw blades 25A, 25C, 25B, 25D.
Corresponding to, it has a two-step shape with a semicircular cross section.

In the case of this machine, the notch screw driving part in the center part also serves as a partition wall and is completely separated left and right. Therefore, the kneading notch screw conveyors 41 are provided in the lower central parts of the left and right face chambers, respectively. The excavated earth and sand are collected at the center and the excavated earth and sand is discharged by the earth discharging device 11. However, since the left side and the right side are completely separated, it is possible to install a screw conveyor for soil discharge in each part and discharge soil separately.

In FIG. 11, reference character a denotes a reference axis of the cylindrical body 1 extending in a direction substantially perpendicular to the center of the excavation direction and having a line symmetrical shape, and a'is a '. It is a rotation axis of the main cutting tool 2A that is substantially perpendicular to the axis.

FIGS. 15 to 19 show a fourth embodiment of the present invention. In this embodiment, the notched screw blades of two upper and lower notched screw conveyors are provided so that they are staggered and the inner parts overlap each other. In addition, in combination with the kneading blade 26 provided on the notched screw blade, it is characterized in that the excavated soil can be more effectively kneaded. The other structure is similar to that of the third embodiment.

FIG. 21 shows a fifth embodiment of the present invention. In this embodiment, a cylindrical body having a line-symmetrical shape with respect to an axis forming a substantially right angle when the apparatus is viewed from the front with respect to the excavation direction. 1 and a cutting machine which is provided in the cylindrical body 1 and which extends in a substantially horizontal direction from the central part to both sides with respect to the excavation direction, and which rotates around a rotation axis a ″ which is retracted at an angle. It is characterized in that it is provided with a tool.

In this case, it is preferable that the tip portions of the upper surface and the lower surface of the cylindrical body 1 are formed in a dogleg shape in symmetry with the rotation axis a ". The partition wall 1a also corresponds to an angle from the central portion. In this embodiment, the rotary shaft a ″ is retracted at a certain angle, and therefore the left and right rotary drums 4A and 4B forming the cutting tool are inclined rearward at an angle. The second embodiment is substantially the same as the second embodiment except that the front portion of the cylindrical body 1 is formed correspondingly. The detailed description is omitted.

As described above, as a cutting member of a cutting tool capable of cutting an arbitrary cross section, as shown in the first embodiment, a cutting bit supporting member having a cutting bit on a rotary drum or a ribbon-shaped screw blade for cutting is used. It may be provided, or if it is desired to obtain a vertically longer rectangular cross section, a notched screw conveyor having two upper and lower stages as shown in the second and third embodiments may be used. Furthermore, when sufficient kneading is required depending on the properties of the excavated earth and sand, the blades of the upper and lower cut-out screw conveyors may be arranged alternately as shown in the fifth embodiment, and depending on the situation. It is selected appropriately.

Although the shield method has been described in each of the above-mentioned embodiments, it is needless to say that it can be applied to excavation such as rock excavation that does not use segments.

[0036]

As described above, according to the present invention, it is possible to efficiently excavate the entire rectangular cross section without leaving an unexcavated portion by mixing the excavated soil with a mixing blade or the like.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a side view of the first embodiment.

FIG. 3 is an explanatory view showing a rotating mechanism of the cutting tool according to the first embodiment.

FIG. 4 is a side sectional view of the first embodiment.

FIG. 5 is a plan view of the second embodiment.

FIG. 6 is a front view of the second embodiment.

FIG. 7 is a sectional view taken along line AA of FIG. 6 of the second embodiment.

FIG. 8 is a sectional view taken along line BB in FIG. 6 of the second embodiment.

FIG. 9 is a sectional view taken along line CC of FIG. 6 of the second embodiment.

10 is a sectional view taken along line DD of FIG. 7 of the second embodiment.

FIG. 11 is a front view of the third embodiment.

FIG. 12 is a sectional view taken along line AA in FIG. 11 of the third embodiment.

FIG. 13 is a sectional view taken along line BB in FIG. 11 of the third embodiment.

14 is a sectional view taken along line CC in FIG. 11 of the third embodiment.

FIG. 15 is a front view of the fourth embodiment.

FIG. 16 is a sectional view taken along line AA in FIG. 15 of the fourth embodiment.

FIG. 17 is a sectional view taken along line BB in FIG. 15 of the fourth embodiment.

FIG. 18 is a sectional view taken along line CC in FIG. 15 of the fourth embodiment.

FIG. 19 is a sectional explanatory view showing a rotating mechanism of the fourth embodiment.

FIG. 20 is a sectional view taken along line DD in FIG. 19 of the fourth embodiment.

FIG. 21 is a horizontal sectional view of the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Cutting tool 3 Cutting chamber 4 Rotating drum 6 Cutting bit 7 Fixed shaft 8 Cutting tool drive motor 10 Viscosity imparting material injection hole 11 Soil discharging device 19 Ribbon screw support member 20 Ribbon screw blade

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Inoue 1-24-4 Shinkawa, Chuo-ku, Tokyo Daitoken Construction Co., Ltd.

Claims (6)

[Claims] 1. A cylindrical body (1) which is a line-symmetrical figure based on an axis (a) which is substantially perpendicular to the excavation direction, and a cylindrical body (1) which is provided in the cylindrical body (1) and which is in the excavation direction. A horizontal shaft provided with a cutting tool (2) that extends from a central portion toward both sides in a substantially horizontal direction and that rotates around a rotating shaft (a '') that retracts at an angle. Construction equipment. 2. A cylindrical body (1) which is a line-symmetrical figure with respect to an axis (a) which is substantially perpendicular to the excavation direction, and a cylindrical body (1) which is provided in the cylindrical body (1) and which is in the excavation direction. A cutting tool (2) rotatably arranged in a direction that forms a substantially right-angled direction, and a cutting member of the cutting tool (2) has a rotary drum (i.e., a substantially right-angled direction). 4), and a horizontal shaft digging device having a ribbon-shaped screw blade provided on the outer periphery of the same and provided with a cutting bit (6) on the outer periphery. 3. The cutting member of the cutting tool (2) includes a rotary drum (4) arranged in a direction substantially perpendicular to the excavation direction,
A cutting bit (6) provided on the outer circumference of the outer circumference
And a notched screw blade having a mixing blade protruding in the axial direction of the rotary drum (4). 4. A Kattus pork having a rotary drum (4) having notched screw blades and mixing blades, which is divided into two parts on the left and right sides, and a shaft extending in the excavation direction as a rotation axis and a bit at the tip end in the center thereof. The horizontal mine construction device according to claim 3, further comprising a central cutting tool provided with. 5. Rotation in a direction substantially perpendicular to the excavation direction, which is provided in a cylindrical body (1) that is a line-symmetrical figure with respect to an axis (a) that is substantially perpendicular to the excavation direction. A rotary drum (4) having notched screw blades and a mixing blade, which constitute a cutting member of a cutting tool (2) that is movably arranged, is provided in two upper and lower stages, and the inside of the notched screw blade is A horizontal mine construction device characterized by being installed in contact with each other. 6. Rotation in a direction substantially perpendicular to the excavation direction, which is provided in a cylindrical body (1) that is a line-symmetrical figure with respect to an axis (a) that is substantially perpendicular to the excavation direction. A rotary drum (4) having notched screw blades and a mixing blade, which constitute a cutting member of a cutting tool (2) that is movably arranged, is provided in two upper and lower stages, and the upper and lower notched screw blades are staggered. A horizontal mine construction device characterized by being installed in.