JP2001059393A - Method and device for constructing horizontal shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal shaft constructing method which can efficiently, safely and easily construct a horizontal shaft of large section, and can be applied irrespective of the properties of the ground. SOLUTION: An outer shell 1 to surround an area to excavate a horizontal shaft is formed, an excavation working base 3 having an excavation space demarcated in multiple stages in the vertical direction by a plurality of floor slabs 4 is installed within the inner side 2 to be excavated of the outer shell 1, an excavator 8 is arranged in a traveling manner on the floor slabs 4 in each excavation space 5 of the excavation base 3, and after the excavation base 3 is fixed, the inner side 2 of the outer shell is excavated by the excavator 8, the inner side 2 is excavated to the specified depth, and then, the excavation base 3 is unfixed, the excavation base 3 is advanced, and an earth retaining supporting 26 is assembled backward of the excavation base 3 to construct the horizontal shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross shaft construction method for constructing a structure crossing a road or under a river, and a cross shaft construction apparatus for performing the method.

[0002]

2. Description of the Related Art Conventional techniques for constructing this type of horizontal shaft include an advanced shaft, an open shield method, a shield Messel method, and the like.

FIG. 10 shows the construction of an upper shaft in an advanced shaft.

In the advanced shaft shown in FIG. 10, a pipe roof 41, a work gantry 42 installed in front of the pipe roof 41,
The construction is performed using a backhoe 43 as an excavator, a row of belt conveyors 44 for carrying out excavated earth and sand, an earth and sand container 45, and a crane 46 for transporting various materials and excavated earth and sand. In FIG. 10, reference numeral 47 denotes an excavated upper half advanced shaft, and reference numeral 48 denotes an assembled earth retaining support.

In this advanced shaft, an advanced shaft with a small cross section, a lateral advanced shaft, or an upper half and a lower half advanced shaft are preceded by construction, and then the respective advanced shafts and lateral advanced shafts are constructed. The earth retaining supports will be connected to each other, and will be greatly expanded to construct a large cross section shaft.

FIG. 11 shows the construction of a horizontal shaft by the open shield method.

[0007] In the construction method shown in FIG.
This is performed using a cutting edge 52, a shield jack 53 thereof, a face jack 54, a belt conveyor 55 for carrying out excavated earth and sand, a work table 56, and an erector 57 for assembling a support.

In this open type shield, the front face of the shield is open, the face is held down by a face jack 54, and the outer shell and frame of the excavator are integrated with each other. Is composed of only the shield jack 53.

However, in this open shield method,
The cutting edge 52 is pushed into the ground, and the cutting face is excavated little by little under the cutting edge.
Excavate the entire cross section while performing the stop in step 4.

On the other hand, in the shielded messel construction method, a messe steel sheet pile having a special cross-sectional shape (cross-sectional shape similar to a normal sheet pile) (width: 20 to 40 cm, length: 3.5 to 6.5 mm).
(About 0 m) is pressed into the ground using a jack, and the ground inside the steel sheet pile is excavated under the protection of the steel sheet pile. And, in consideration of the connection between adjacent Messel steel sheet piles, they are structured to mesh with each other.

[0011]

However, since the advanced pit has many work sites, there are many competitions for shearing in narrow pits and transport of concrete and the like, and the work process is complicated.
There is a problem that process management is difficult. In addition, since the work space is small, the use of a large excavator is restricted, and there is a problem that the construction period is prolonged, and there is a problem that the construction is dangerous. In addition, multiple advanced shafts and side shafts with small cross sections are constructed, and the earth retaining supports are connected to each other. -There was a problem that many skilled workers were required, and there was also a problem that the degree of danger was large.

On the other hand, in the above-mentioned open shield construction method, when the ground is hard and it is difficult to penetrate the cutting edge, it is necessary to perform excavation, and there is a possibility that the surface will sink.

On the other hand, in the shielded messel construction method, the soil suitable for this construction method is a geological structure capable of being self-sustaining, and in order not to loosen the ground, it must be a stratum capable of penetrating the messel arrowhead to some extent and excavating. There is a problem that is not suitable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently, safely and easily construct a large cross-section shaft, and to apply it regardless of the properties of the ground. The drilling can be performed without the need for special skills and skills.
It is an object of the present invention to provide a cross shaft construction method that can be constructed without the need for skills and machinery.

Another object of the present invention is to provide a method for constructing a cross shaft capable of excavating a cross shaft more safely.

Further, another object of the present invention is to mechanize the excavation work of the cross shaft and the assembling work of the earth retaining structure to save labor, and to construct the cross shaft capable of appropriately implementing the cross shaft construction method. It is to provide a device.

[0017]

In order to achieve the above object, according to the cross shaft construction method of the present invention, the outer shell 1 surrounding the area where the cross shaft 32 is to be excavated is formed, and the outer shell 1 to be excavated is formed. A digging work gantry 3 having a digging work space 5 is set in the shell inside 2, and after digging the outer shell inside 2 to a predetermined length via an excavator 8, the digging work gantry 3 is advanced and the digging work is performed. The earth retaining shoring 26 is assembled behind the gantry 3 to construct the horizontal shaft 32.

In order to achieve the above object, according to the cross shaft construction method of the present invention, an excavation work space 5 having a plurality of floor slabs 4 formed in a multi-tiered manner in an up-down direction with respect to an inner shell 2 is provided. After the work gantry 3 is installed, an excavator 8 is arranged in each digging work space 5 of the digging work gantry 3 so as to be able to run on the floor slab 4, and the digging work gantry 3 is fixed. Before excavating the interior 2, the ground around the outer periphery of the outer shell 1 is subjected to a water stoppage treatment to prevent infiltration into the interior 2 of the outer shell, and the inner surface 2 of the outer shell is prevented from collapsing and the face becomes independent. We are trying to improve the ground to maintain it.

Further, in order to achieve the above object, in the horizontal shaft construction apparatus of the present invention, an outer shell 1 formed so as to surround an area where a horizontal shaft 32 is to be excavated, and a plurality of floor slabs 4 are provided in multiple stages in the vertical direction. Excavation work gantry 3 having sectioned digging work space 5, and each digging work space 5 of this digging work gantry 3
A plurality of excavators 8 arranged so as to be able to travel on the floor slab 4 and the excavation work gantry 3 during excavation work,
At the time of propulsion, fixing / releasing means for releasing the fixation of the excavating work gantry 3, excavating earth and sand carrying means for receiving excavated earth and sand from the excavator 8 and carrying it out of the mine, and a plurality of Propulsion jack 13, reaction force means for obtaining a reaction force by these propulsion jacks 13, earth retaining support material 2
And a supporter assembling device 16 that has a gripper 18 and is configured to be able to move and turn at least vertically and horizontally and to assemble the earth retaining supporter 26 behind the excavation work gantry 3 in the excavated mine. , Earth retaining support 26
Also, a supporter assembly material carrying means for carrying in materials necessary for assembling the supporter and transferring the material to the supporter assembly device 16 is provided.

[0020]

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

FIGS. 1 to 9 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional side view showing a state of excavation work, earth retaining support assembling work, and main body construction state in a horizontal shaft construction apparatus, and FIG.
1 is a sectional view taken along the line AA in FIG. 1, the right half is a sectional view taken along the line BB in FIG. 1, FIG. 3 is an enlarged view of a portion E in FIG. 1, and FIGS. FIG. 7 is an explanatory view of the first, second, and third stages of the construction method, and is a vertical side view at that stage, and FIG.
8 is a sectional view taken along line FF of FIG. 9, FIG. 8 is a sectional view taken along line GG of FIG.
1 is a cross-sectional view taken along line CC of FIG. 1, and the right half is a cross-sectional view taken along line DD of FIG.

In the embodiment shown in these figures, the horizontal shaft construction apparatus comprises an outer shell 1, an excavating work gantry 3, an excavator 8, and a support jack 9 which is a means for fixing and releasing the excavating work gantry 3.
And a wide belt conveyor 12 which is a means for carrying out excavated earth and sand.
, The propulsion jack 13 of the excavation work gantry 3, the reaction force gantry 14, which is a reaction force means of the propulsion jack 13, and the reaction force hardware 1.
5, an assembling apparatus 16 having a retaining device 18 for holding a retaining material, and an overhead traveling hoist crane (hereinafter, referred to as a "hoist") serving as a supporting and assembling material carrying means for carrying the retaining material and the like. .) 22 and so on.

In FIGS. 1 and 2, the front-back direction is XX, the right-left direction orthogonal to this is Y-Y, the up-down direction is ZZ, and the turning around the left-right axis is α.

The outer shell 1 is formed by a pipe roof method, a shield preceding the outer shell or a propulsion method. In this embodiment, the outer shell 1 is formed by a pipe roof method.

[0025] The pipe roof method has a relatively shallow earth cover, and there is a structure such as a road or a building on the ground which does not allow subsidence, or a place with soft geology such as unconsolidated geology or a fault crush zone. This method is used to protect existing structures when excavating tunnels, and to minimize the loosening of mountains.

In this pipe roof construction method, prior to the excavation of the horizontal shaft, steel pipes are inserted by boring or press-fitting at a certain interval along the outer periphery of the excavated cross section.
A roof (roof) is formed by rows of steel pipes according to the shape of the horizontal shaft to be excavated, and the roof-shaped steel pipes are directly supported by supports with the excavation of the horizontal shaft, and loosening of the ground due to excavation is performed. This is a construction method to prevent deterrence and reduce the influence on the ground surface and to perform construction safely.

The digging work gantry 3 is a steel frame structure, and digging work spaces 5 are formed in multiple stages in the vertical direction ZZ by floor slabs 4 laid in a plurality of stages. Also, in the excavation work space 5 of each step, a brace 6 is stretched at predetermined intervals in the left-right direction YY when viewed from the front. Further, as shown in FIG. 1, the excavation work gantry 3 is arranged to move forward on the shoe structure 7.

A backhoe is used for the excavator 8. The excavator 8 is arranged in the excavation work space 5 of each stage of the excavation work gantry 3 so as to excavate the inside 2 of the outer shell. Then, each excavator 8 freely travels on the floor slab 4 of the corresponding stage. When the excavator 8 moves in the left-right direction Y-Y at this stage, the brace 6 is changed.

The support jack 9, which is a means for fixing and releasing the excavating work gantry, comprises a plurality of rollers 11 provided on the outer surface of a spreader 10. As shown in FIG. 2, a plurality of the shoring jacks 9 are provided on the outer side and the upper part of the excavation work gantry 3. These support jacks 9 cooperate and fix the excavation work gantry 3 inside the outer shell 1 when excavating the ground, release the fixation of the excavation work gantry 3 when propelling the excavation work gantry 3, The excavation work gantry 3 is propelled while supporting the outer shell 1 with a plurality of rollers 11.

As shown in FIG. 1, the row of the belt conveyor 12 serving as the excavated earth and sand discharging means receives the excavated earth and sand from the excavator 8 and carries the excavated earth and sand out of the pit.

The propulsion jack 13 is shown in FIGS.
As shown in the figure, a plurality of excavating work gantry 3 are installed at the lower side and the upper side, respectively. And
In the initial stage of the excavation, as shown in FIG. 3, the lower and upper propulsion jacks 13 propelled the excavation work gantry 3 by applying a reaction force to the reaction force gantry 14, and the excavation work gantry 3 was propelled deep inside the mine. Thereafter, as shown in FIG. 1, the lower propulsion jack 13 takes a reaction force on the reaction hardware 15, and the upper propulsion jack 13 takes a reaction force on the earth retaining support 26, a main body construction 27 described below, and the like. The lower and upper propulsion jacks 13 cooperate to propel the excavation work gantry 3.

The shoring jack 9 and the propulsion jack 13 are connected to a hydraulic circuit and are remotely operated.

The shoring and assembling apparatus 16 includes an apparatus main body 17, an earth retaining shoring material holding device 18, a vertical moving rail 19, a left and right moving rail 20, and an oblique moving rail (not shown). And a turning rail 21. The device main body 17 is configured to be able to expand and contract in the vertical direction. Further, the apparatus main body 17 is provided with the vertical moving rail 1.
9, so as to be movable in the vertical direction Z-Z, the horizontal direction Y-Y and the diagonal direction along the left-right moving rail 20 and the diagonal moving rail, and to be able to turn α along the turning rail 21. It is configured. The retaining device 18 for retaining the earth retaining material is attached to an upper rear portion of the device main body 17. As can be seen from FIG. 1, the supporter assembling device 16 is a holding device 1 for the earth retaining supporter 25.
8 is arranged rearward and attached to the rear of the excavation work gantry 3 via a rail 20 for moving left and right. Then, this supporter assembling apparatus 16 grips the earth retaining supporter 25 by the gripper 18 and, if necessary,
It is configured to be able to move in the Z, left-right direction YY, diagonal directions and make a turn α to assemble the earth retaining support 26.

As shown in FIG. 1, the hoist 22 as the support material assembling material carrying means travels in the front-rear direction XX along the ceiling traveling rail 23 erected on the main body construction 27, The shoring support material 25 and materials necessary for assembly are carried in to the shoring and assembling device 16.

Next, an example of the cross shaft construction method of the present invention will be described in relation to the operation of the cross shaft construction apparatus configured as described above.

First, an outer shell 1 surrounding an area where a horizontal shaft is to be excavated is formed. The outer shell 1 is formed by a pipe roof method, a shield preceding the outer shell or a propulsion method. In this embodiment, the outer shell 1 is formed by the pipe roof method.
Is formed.

Further, if necessary, a chemical solution is injected into the ground at the outer peripheral portion of the outer shell 1 to perform a water stopping process for preventing water from entering the inner portion 2 of the outer shell. The ground into which the chemical has been injected is indicated by reference numeral 2 'in FIG.

Further, in order to improve the ground for preventing the face from collapsing and maintaining the face independently,
Inject chemical solution in all sections.

Next, a plurality of (three-step) floor slabs 4 made of steel and having a framed structure are provided in a plurality of steps (4
The digging work gantry 3 having the digging work space 5 of the (stage) is assembled, and a brace 6 is stretched in the left-right direction Y-Y of the digging work space 5 of each stage, and as shown in FIG. Is placed in front of the outer shell 1.

An excavator 8 is arranged in each excavation work space 5 of the excavation work gantry 3.

Further, the reaction force gantry 14 is assembled, and the reaction force gantry 14 is installed behind the excavation work gantry 3 as shown in FIG.

After the excavation work gantry 3 and the reaction force gantry 14 are installed as described above, the ground inside the outer shell 2 is excavated by the excavator 8 arranged in each excavation work space 5 of the excavation work gantry 3. When excavating the ground inside the outer shell 2,
The excavator 8 of each excavation work space 5 of the excavation work gantry 3 is moved in the front-rear direction XX and the left-right direction YY so that the excavation progress is averaged from the upper part of the upper part to the middle part and the lower part, For example, excavation is performed to a depth of about 50 cm. Then, the excavator 8 arranged in the excavation work space 5 of each stage is moved in the left-right direction Y-
When moving to Y, brace 6 is changed.

Under the excavating work gantry 3, a shoe structure 7 made of an iron plate is laid to facilitate the propulsion movement of the excavating gantry 3 toward the face.

In this manner, the inside 2 of the outer shell is
After digging to a predetermined depth of about cm, in the initial stage of digging, a reaction force is applied to the reaction force gantry 14 and the excavation work gantry 3 is advanced to the face side by the propulsion jack 13.

When excavation has proceeded until the excavation work gantry 3 enters the inside of the hull inside the outer shell 2, as shown in FIG. 5, a plurality of support jacks 9 are extended during the excavation work, respectively.
A plurality of rollers 11 provided on a spreader 10 of each support jack 9 are pressed against the inside of the outer shell 1 to fix the excavation work gantry 3 to the outer shell 1.

After the inside of the outer shell 2 has been dug to a predetermined depth, the shoring assembly device 1
6 to assemble the earth retaining support 26. At the time of assembling the earth retaining support 26, an ascending and descending work platform (not shown) that can be moved up and down and left and right is used as an auxiliary work platform for the worker.
Use The earth retaining shoring material 25 and the shoring assembling material are carried into the wellhead from outside the mine using a crane (not shown) or the like.

When assembling the earth retaining shoring 26, the holding device 18 provided in the shoring assembling device 16 is used.
By holding the earth retaining support material 25 and the support assembling material, the assembling apparatus main body 17 is moved along the vertical movement rail 19, the horizontal movement rail 20, and the turning rail 21 to a position required for assembly. As shown in FIG. 4, the earth retaining shoring 26 is assembled.

When the excavation has proceeded deep into the inside of the outer shell 2, a plurality of belt conveyors 12 for carrying out the excavated soil 24 are installed in combination as necessary.

Next, as shown in FIG. 2, the ground inside the outer shell 2 is excavated by an excavator 8 arranged in each excavation work space 5 of the excavation work gantry 3, and the excavated soil 24 is conveyed to the belt conveyor 12. Rows carry off the mine and continue excavation.

When the ground inside the outer shell 2 is extended to the predetermined depth again and excavated, the support jacks 9 are respectively reduced, the fixing of the excavation work gantry 3 is released, and the spreader jacks of the respective support jacks 9 are spread. The outer shell 1 can be propelled while being supported by the rollers 11 provided on the outer shell 1.

Further, on the lower side of the excavated shell inner portion 2,
The reaction hardware 15 for the propulsion jack is fixed. The lower propulsion jack 13 applies a reaction force to the reaction hardware 15, and the upper propulsion jack 13 applies the outer shell 1 such as the earth retaining support 26.
The excavation work gantry 3 is advanced by taking a reaction force to the structure fixed to the digging work gantry 3. At this time, the excavation work gantry 3 can be easily moved while the outer shell 1 is supported by the rollers 11 provided on the spreaders 10 of the respective support jacks 9.

Excavation work proceeds further, and after advancing to a distance for constructing a structure for one span, for example, about 7 to 8 m, a plurality of earth retaining supports 26 assembled as shown in FIG. The main body construction 27 is performed.

The main body construction 27 is performed by constructing a lower floor slab 28, in this embodiment, upper and lower two side walls 29, 30 and an upper floor slab 31.

After the main body 27 has been constructed, a hoist ceiling travel rail 23 is installed inside the main body 27, and the hoist 22 is mounted on the ceiling travel rail 23 so as to be able to travel in the front-rear direction XX.

Then, the earth retaining support material 25 and the material for the assembling work are carried into the pit from the wellhead side by the hoist 22 and delivered to the gripping device 18 in the assembling and assembling apparatus 16. Assembly 26 is assembled.

As described above, according to this embodiment,
(1) fixation of the excavation work gantry 3 by extending the shoring jack 9; (2) the ground inside the outer shell 2 by the excavator 8 arranged in the excavation work space 5 of each stage of the digging work gantry 3 Excavation, (3) unloading of excavated earth and sand 24 by the row of belt conveyor 12, (4) release of fixing of excavation work gantry 3 by reducing support jack 9, (5) excavation by propulsion jack 13 Advancement of the work gantry 3; (6) Gripping device 1 of loading / supporting assembling device 16 for loading / supporting assembling material 25 and supporting assembling material by hoist 22
8 and (7) assembling the earth retaining shoring 26 by the shoring assembling apparatus 16 and (8) constructing the main body construction 27 on the plurality of earth retaining shorings 26. Of the horizontal shaft 32 is constructed.

In preparation for the collapse of the ground, a shelf (not shown) is provided in the middle of each work floor so that a large-scale collapse of the ground does not occur. In some cases, a face jack (also not shown) for holding the ground face is provided in front of the excavation work gantry 3.

As described above, in this embodiment, the area where the horizontal shaft 32 is to be excavated is surrounded by the outer shell 1, and the inside 2 of the outer shell 1 where the excavation is to be excavated is covered by the plurality of floor slabs 4 in the vertical direction. A digging work gantry 3 having a digging work space 5 formed in multiple stages in ZZ is installed, and an excavator 8 is arranged in each digging work space 5 of the digging work gantry 3 so as to be able to travel on a floor slab 4. Since the inside 2 of the outer shell is directly excavated by the plurality of excavators 8 arranged in the vertical direction Z-Z, the horizontal shaft 32 having a large cross section can be easily excavated, and Applicable regardless of properties.

In this embodiment, each excavation work space 5 formed in multiple stages in the vertical direction ZZ of the excavation work gantry 3 is formed.
Excavation of the ground inside the outer shell 2 is carried out by a plurality of excavators 8 arranged in the ground, the excavated earth 24 is carried out of the mine, and after excavation to a predetermined depth, the excavation work gantry 3 is advanced to the face side, The earth retaining shoring 26 is assembled behind the excavation work gantry 3, and the main body construction 27 is constructed over the assembled plurality of earth retaining shorings 26, so that the working process is simple and the process management is easy. In addition, since the work hall can be widened, the work can be easily performed, so that the cross section 32 having a large cross section can be efficiently constructed, and therefore, the construction period can be shortened. 26 can be constructed without the need for special skills, skills, and machinery, and the excavation work gantry 3 is fixed when excavating the ground inside the outer shell 2, and the earth retaining support 26 Assembling In that it can be carried out the work in a wide space, it is possible to safely carry out the assembly work of excavation work and earth retaining 支保 Engineering 26 of the natural ground.

Further, in this embodiment, before starting the excavation of the inside of the outer shell 2, a chemical solution is injected into the ground around the outer periphery of the outer shell 1 to perform a water stopping process on the inner surface of the outer shell 2. In No. 2, the chemical liquid is injected in all cross-sections in order to prevent the collapse of the face and to improve the ground for maintaining the face independently, so that the horizontal shaft 32 can be excavated even more safely.

Further, in this embodiment, an outer shell 1 formed so as to surround an area where the horizontal shaft 32 is to be excavated, and an excavating work space partitioned in multiple stages in the vertical direction ZZ by a plurality of floor slabs 4. 5, a plurality of excavators 8 arranged in each excavation work space 5 of the excavation work gantry 3 so as to be able to travel on the floor slab 4, and the excavation work gantry 3 during the excavation work. A fixing jack 9 for fixing and releasing the fixing of the excavating work gantry 3 at the time of propulsion, and a belt conveyor 12 for receiving excavated earth and sand 24 from the excavator 8 and carrying it out of the mine.
, A plurality of propulsion jacks 13 for propelling the excavation work gantry 3, and a gripping device 18 for the earth retaining support material 25, and at least the vertical direction ZZ, the horizontal direction YY,
A shoring assembling device 16 configured to perform a diagonal movement and a turning α around the axis in the left-right direction Y-Y, and to assemble the shoring support 26 behind the digging work gantry 3; Since it is equipped with the hoist 22 which carries in the work material 25 and the materials necessary for assembling the same and transfers it to the shoring and assembling apparatus 16, the excavation work of the horizontal shaft 32 and the assembling work of the earth retaining shoring 26 are mechanized. Therefore, labor saving can be achieved, and the cross shaft construction method can be implemented accurately.

In this embodiment, the spreader 10 of each support jack 9 is provided with a plurality of rollers 11, so that when the excavation work gantry 3 is released from being fixed, the outer shell 1 is moved by the rollers 11. The excavation work gantry 3 can be propelled while being supported.

In the present invention, the specific structure of each part is not limited to that shown in the drawings, but may be any as long as it has a desired function.

[0064]

As described above, according to the cross shaft construction method of the present invention, the outer shell 1 surrounding the area where the cross shaft 32 is to be excavated is formed, and the outer shell 1 of the outer shell 1 to be excavated is formed. hand,
Since the excavation work gantry 3 having the excavation work space 5 is installed and the excavator 8 directly excavates the ground inside the outer shell 2, there is an effect that the horizontal shaft 32 having a large cross section can be easily excavated. There is an effect that it can be applied regardless of the properties of the ground.

Further, in the cross shaft construction method of the present invention, the inside of the outer shell 2 is excavated by the excavator 8 disposed in each excavation work space 5 formed in multiple stages in the vertical direction ZZ of the excavation work gantry 3. After digging to a predetermined extension, the digging work gantry 3 is advanced, and the earth retaining support 26
To assemble the shaft 32. As a result, the work process is simple, the process management is simple, and the work space can be widened, so that the work can be easily performed, so that the horizontal shaft 32 can be efficiently constructed, and the construction period can be shortened. Both the excavation work of the horizontal shaft 32 and the assembling work of the earth retaining shoring 26 have special skills and skills,
There is an effect that it can be constructed without requiring special machinery and equipment.

In the method of constructing the cross shaft according to the present invention, the excavation work gantry 3 is fixed when excavating the inside of the outer shell 2. After releasing the fixation, the ship is moved forward, and the earth retaining shoring 2 is provided in a wide working space behind the digging work gantry 3.
6 has an effect that the excavation work of the ground and the assembling work of the earth retaining support 26 can be safely performed.

Further, in the cross shaft construction method of the present invention, before excavation of the inside of the outer shell 2 is started, the ground around the outer periphery of the outer shell 1 is subjected to a water stoppage treatment for preventing infiltration into the inner shell 2. Since the outer shell interior 2 is made to improve the ground to prevent collapse of the face and to maintain the face independently, there is an effect that the horizontal shaft 32 can be excavated more safely.

Further, in the horizontal shaft construction apparatus of the present invention, the horizontal shaft 3
An outer shell 1 formed so as to surround an area to be excavated 2
A digging work gantry 3 having a plurality of digging work spaces 5 formed in multiple stages in the vertical direction ZZ by a plurality of floor slabs 4, and traveling on the slab 4 in each of the digging work spaces 5 of the digging work gantry 3 A plurality of excavators 8 arranged so as to be capable of being fixed; a fixing / releasing means for fixing the excavation work gantry 3 during excavation work and releasing the fixation of the excavation work gantry 3 during propulsion; 24, receiving means 24 for carrying out the excavated earth and sand, a plurality of propulsion jacks 13 for propelling the excavation work gantry 3, reaction force means for obtaining a reaction force by the propulsion jacks 13, and earth retaining support materials A shoring assembling device 1 having 25 gripping devices 18 and capable of moving and turning at least vertically and horizontally, and assembling the earth retaining shoring 26 behind the excavation work gantry 3 in an excavated mine. And the earth retaining shoring 25 and the material necessary for assembling the earth retaining shovel 25 and the means for transferring the shoring assembling material to be transferred to the shoring and assembling apparatus 16 are provided. There is an effect that the assembling work of the clasp support 26 can be mechanized to save labor, and also has an effect that the above-described cross shaft construction method of the present invention can be accurately executed.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a vertical sectional side view showing an excavation operation, an earth retaining support assembling operation, and a main body construction state in a horizontal shaft construction apparatus.

2 is a cross-sectional view taken along the line AA of FIG. 1 in the left half, and FIG.
FIG. 7 is a sectional view taken along line BB of FIG.

FIG. 3 is an enlarged view of a portion E in FIG. 1;

FIG. 4 is an explanatory diagram of a first stage of the cross shaft construction method of the present invention.

FIG. 5 is an explanatory diagram of a second stage of the horizontal shaft construction method.

FIG. 6 is an explanatory diagram of a third stage of the horizontal shaft construction method.

FIG. 7 is a sectional view taken along line FF of FIG. 6;

FIG. 8 is a sectional view taken along line GG of FIG. 6;

9 is a cross-sectional view taken along the line CC of FIG. 1 in the left half, and FIG.
FIG. 4 is a sectional view taken along line DD of FIG.

FIG. 10 is an explanatory view of a conventional technique, and is a view showing a construction state of an upper half advanced shaft in an advanced shaft.

FIG. 11 is an explanatory view of another conventional technique, and is a view showing a construction state of a horizontal shaft by an open shield method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Outer shell 2 Outer shell inside 3 Excavation work gantry 4 Floor slab of excavation work gantry 5 Excavation work space 8 Excavator 9 Shoring jack which is a fixing and releasing means of excavating work gantry 10 Spreader of shoring jack 11 Provided on spreader A plurality of rollers 12 a belt conveyor as an excavated earth and sand unloading means 13 a propulsion jack 14 a reaction force gantry as a reaction force means 15 a reaction force hardware 16 as a reaction force means 16 support assembling apparatus 17 assembling apparatus body 18 earth retaining support material Gripping device 19 vertical moving rail 20 left / right moving rail 21 turning rail 22 hoist as hoisting assembling material carrying means 23 hoist ceiling running rail 25 earth retaining material 26 earth retaining material 27 body construction 28 body construction Lower floor slab 29,30 Side wall of main body construction 31 Upper floor slab of main body construction 32 Horizontal shaft

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E21D 11/40 E21D 11/40 A (72) Inventor Katsumitsu Miyazawa 1-4-4 Shinkawa, Chuo-ku, Tokyo F-term (reference) in Taihoken Corporation 2D054 AC20 BA22 DA02 FA02 2D055 BA09 BB03 GA04 GB01 GB07

Claims (3)

[Claims] An outer shell (1) surrounding an area in which a shaft (32) is to be excavated is formed, and the outer shell (2) of the outer shell (1) is excavated.
A digging work gantry (3) having a digging work space (5) is installed, and after excavating the inside of the outer shell (2) to a predetermined length through an excavator (8), the digging work gantry (3) is advanced, A method for constructing a cross shaft, comprising assembling an earth retaining support (26) behind the excavation work gantry (3) and constructing a cross shaft (32). 2. An excavation work gantry (3) having an excavation work space (5) partitioned into a plurality of stages in a vertical direction by a plurality of floor slabs (4) is installed inside the outer shell (2); An excavator (8) is arranged in each excavation work space (5) of the excavation work gantry (3) so as to be able to run on the floor slab (4), and the excavation work gantry (3) is fixed. Before excavating the inside of the outer shell (2) according to 8), the ground around the outer periphery of the outer shell (1) is subjected to a water stoppage treatment to prevent infiltration into the inner shell (2),
The cross shaft construction method according to claim 1, wherein soil improvement is performed inside the outer shell (2) to prevent collapse of the face and maintain the face independently. 3. An excavation work space formed in a vertical multi-tiered manner by an outer shell (1) formed so as to surround an area where a horizontal shaft (32) is to be excavated, and a plurality of floor slabs (4). An excavation work gantry (3) having a digging work gantry (5); and a plurality of excavators (8) arranged so as to be able to travel on a floor slab (4) in each digging work space (5) of the digging work gantry (3). Fixing and releasing means for fixing the excavating work gantry (3) during excavation work and releasing the fixing of the excavating work gantry (3) during propulsion; receiving excavated earth and sand from the excavator (8); Excavated earth and sand unloading means for unloading, a plurality of propulsion jacks (13) for propelling the excavation work gantry (3), reaction force means for obtaining a reaction force by these propulsion jacks (13), and earth retaining support materials ( 25) having a gripping device (18) and at least up and down, left and right Excavation work gantry (3) configured to be movable and swivel in the direction and excavated in the mine
A shoring assembly device (16) for assembling an earth retaining shoring (26) at the back of the pier, a soil retaining shoring material (25), and materials necessary for assembling the same, are carried in, and the shoring assembling device (16) And a means for carrying in assembling materials to be delivered to a mine shaft.