JP4460146B2 - Method and equipment for accepting tunnel excavator into reach shaft - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for receiving a tunnel excavator that has been propelled in the ground and excavated a retaining wall of an upright shaft and reached the retaining wall, and a receiving facility therefor.
[0002]
[Prior art]
Of shield-type tunnel excavators and pipe-propelled tunnel excavators that have been propelled underground to form a tunnel, and then excavated and penetrated the retaining wall and reached the reach shaft defined by the retaining wall. Such a tunnel excavator is received in a receiving facility installed in the reach shaft in order to prevent the inflow of groundwater and earth and sand from the gap between the retaining wall and the tunnel excavator passing therethrough.
[0003]
Conventionally, in order to receive a tunnel excavator, a casing that defines a sealed space for receiving a part of the tunnel excavator penetrating the retaining wall in advance is attached to the retaining wall, and a part of the tunnel excavator is received. Thereafter, it has been proposed that the sealed space is filled with a solidifying material such as a mortar whose solidified material has a water-stopping property (Japanese Patent Laid-Open No. 10-25989).
[0004]
According to this, the solidified material of the solidifying material filled in the casing and filling the gap between the tunnel excavator and the retaining wall completely prevents the water from stopping inflow of groundwater and earth and sand from the gap. Can be. This water-stopping state is caused by the subsequent removal of the casing and the solidified material in the casing, and the subsequent separation / removal of a part of the tunnel excavator (rotating cutter head) or the reaching shaft. It is also maintained during the operation of pulling out the tunnel excavator from the retaining wall for re-starting.
[0005]
By the way, in order to reinforce the through-hole generated in the retaining wall by excavating and penetrating the tunnel excavator prior to separating / removing or extracting a part of the tunnel excavator, an annular structure is used on the retaining wall. A wellhead wall is provided.
[0006]
The well wall assembles a formwork around the main body of the tunnel excavator or the subsequent segment ring or pipe that has penetrated the through hole, and casts a solid material such as concrete or mortar on it. It is built by
[0007]
However, it takes a lot of time and labor to assemble the formwork and then dismantle and remove it.
[0008]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a tunnel excavator receiving method and its equipment which do not require special installation of a formwork for construction of a wellhead wall.
[0009]
[Means for Solving the Problems]
The present invention is a method for accepting a tunnel excavator that has been propelled in the ground and excavated the earth retaining wall of the reach shaft and reached it, and is installed in the reach shaft before reaching the tunnel excavator. A first block having a water-stopping property and capable of being dissolved, the first block sealed between the retaining wall and the second block having a water-stopping property in contact with the first block Sequentially excavating so that the tunnel excavator penetrates the first block and a part of the tunnel excavator reaches the second block, melting the first block, Removing the dissolved first block; and filling the removal trace of the first block with a solidifying material (first invention).
[0010]
In another aspect of the present invention, the tunnel excavator and the subsequent segment ring or pipe penetrate the first block through the first block and the second block. Drilling sequentially into the second block, then melting the first block, removing it, and filling the removed trace with a solidifying material (second invention). .
[0011]
Further, according to another aspect of the present invention, a block having a water-stopping property installed in the reaching shaft before reaching the tunnel excavator is provided between the block and the earth retaining wall and filled with liquid. After the tunnel excavator penetrates the sealed space And the Some of the tunnel excavators The block Drilling to reach the inside, removing the liquid in the sealed space, and filling the liquid removal trace with a solidifying material (third invention).
[0012]
Furthermore, another invention of the present invention is that the block passes through the sealed space. Before All of the tunnel excavators The block Drilling to reach the inside, then removing the liquid in the sealed space, and filling the removed trace with a solidifying material (fourth invention).
[0013]
In the first invention and the second invention, prior to the melting of the first block, the clearance between the retaining wall and the tunnel excavator penetrating the retaining wall, or the retaining wall and the penetration, respectively. In the third and fourth inventions, prior to the removal of the liquid, the tunnel excavator and the soil can be filled, respectively. A gap between the retaining wall or a gap between the segment ring or pipe and the earth retaining wall can be filled with a filling material.
[0014]
Instead of filling the filling material, in the first and third inventions, the solidifying material is filled in the gap between the tunnel excavator and the retaining wall in addition to the exclusion trace, respectively. In the second and fourth inventions, the solidifying material can be filled in the gap between the segment ring or tube and the retaining wall, respectively.
[0015]
The present invention (fifth invention) relating to a receiving facility provided for the implementation of the first and second inventions is a first block which is disposed in the reach shaft and has water-stopping properties and can be dissolved. A first block penetrating through the excavating action of the tunnel excavator and a second block having a water-stopping property in contact with the first block and receiving the excavating action of the tunnel excavator A second block capable of receiving part or all of the second block; and a sealing means for sealing between the first block and the retaining wall.
[0016]
The present invention (sixth invention) relating to a receiving facility provided for carrying out the third invention or the fourth invention is a block having a water-stopping property disposed in the reach shaft, and excavating action of the tunnel excavator And a block that can receive a part or all of the block, and a sealing means that defines a sealed space filled with a liquid that allows the tunnel excavator to pass between the block and the retaining wall. including.
[0017]
With respect to the fifth invention, a plurality of anchor members provided on the retaining wall, the plurality of anchor members extending from the retaining wall to a portion other than the portion penetrated by the tunnel excavator of the first block. In addition, the sixth invention further includes a plurality of anchor members extending from the earth retaining wall to a portion other than a portion penetrated by the tunnel excavator in the sealed space. it can.
[0018]
In the fifth invention, the first block is made of a foamed plastic material, or further, the first block is made of an annular body and the space is filled with a liquid or mortar solidified product. can do.
[0019]
In the fifth and sixth inventions, the second block and the block may be made of a solidified mortar.
[0020]
Further, in the fifth and sixth inventions, the sealing means is composed of a casing for accommodating the first block and the second block, respectively, and a casing for accommodating the liquid and the block. Can be.
[0021]
Furthermore, in the fifth invention, the sealing means may be made of a solidified mortar.
[0022]
Furthermore, in 5th invention and 6th invention, the said sealing means shall consist of a wall body provided in the said reach shaft and continuing to the earth retaining wall.
[0023]
Operation and effect of the invention
According to the first invention, the tunnel excavator that has excavated and penetrated the retaining wall of the reaching shaft is penetrated by penetrating the first block and further excavating the second block. When a part reaches the second block, it is accepted in both blocks. At this time, the receiving space of the tunnel excavator communicates with the gap between the earth retaining wall and the tunnel excavator penetrating the earth retaining wall, the first block has water-stopping properties, Since the space between the walls is sealed and the second block is water-blocking and is in contact with the first block, the groundwater and earth and sand are completely prevented from flowing into the vertical shaft through the gap. That is, it is possible to completely stop the water when the tunnel excavator reaches the reaching shaft.
[0024]
In addition, after that, the first block is melted, and a space that remains after the first block is removed is filled with a solidifying material, so that an annular structure connected to the earth retaining wall around the tunnel excavator. A wellhead wall can be constructed.
[0025]
In the second invention, the tunnel excavator excavates and penetrates the first block, further excavates the second block, and when the entire block reaches the second block, the second block Accepted within. At this time, since the segment ring or pipe following the tunnel excavator penetrates the first block, the solidified material is filled in the exclusion block of the first block, so that the soil around the segment ring or pipe is filled. It is possible to construct a wellhead wall that continues to the retaining wall.
[0026]
According to the third invention, when the tunnel excavator penetrating the earth retaining wall of the reaching vertical shaft excavates the block through the sealed space filled with the liquid, and a part of the tunnel excavator reaches the block , Received in the enclosed space and block. At this time, the receiving space of the tunnel excavator communicates with the gap between the earth retaining wall and the tunnel excavator passing through the earth retaining wall, the space between the earth retaining wall and the block is sealed, and the block is waterproof. Therefore, it is possible to completely prevent the inflow of groundwater and earth and sand into the reaching shaft through the gap, that is, the water stop when the tunnel excavator reaches the reaching shaft.
[0027]
After that, by filling the material that has solidification into the removal trace that is the space remaining after the liquid in the sealed space is removed, it is possible to construct a wellhead wall connected to the earth retaining wall around the tunnel excavator.
[0028]
In the fourth invention, the tunnel excavator is received in the block when the block is excavated after passing through the sealed space and all of the tunnel excavator reaches the block. At this time, since the segment ring or pipe following the tunnel excavator passes through the sealed space, the solidified material is filled in the liquid removal trace in the sealed space, thereby retaining the earth around the segment ring or pipe. It is possible to construct a wellhead wall connected to the wall.
[0029]
Therefore, in the first invention and the second invention, the exclusion trace of the first block installed for water stop is provided, and in the third invention and the fourth invention, the seal provided for water stop is provided. Since the liquid removal trace in the space is used as a filling space for the solidifying material, it is not necessary to prepare, install and remove the formwork for constructing the well wall. For this reason, it is possible to avoid the narrowing of the space of the upright pit accompanying the installation of the formwork, and it is possible to eliminate the labor and time for the installation and removal work of the formwork.
[0030]
Further, for example, mortar or concrete is used as the solidifying material, and when the second block and the block are made of mortar (5th and 6th inventions), Since the solidified product and the block form a so-called cold joint and are joined to each other, the block can be easily separated from the solidified product.
[0031]
Prior to the removal of the first block in the first and second inventions, and the removal of the liquid in the third and fourth inventions, between the earth retaining wall and the tunnel excavator or the subsequent segment ring or pipe When the gap filling agent is filled in the gap and thereby the communication with the outside of the reaching shaft is cut off, the solidifying material can be filled with the influence of groundwater removed.
[0032]
The gap can be filled with a solidifying material that is a construction material of the wellhead wall, omitting filling of the filling material, and thereby the gap can be closed with a higher-strength material.
[0033]
Further, according to the first invention and the second invention, when the earth retaining wall is composed of a Nomst wall employed in a so-called Nomst construction method (NOMST = Novel Material Shield-cuttable Tunnel-wall System), the first block is a tunnel. It acts to support the Nomst wall that simultaneously receives the pressing force from the excavator and the excavating action so as to reduce the amount of bending.
[0034]
In the third and fourth inventions, this action is exerted by the liquid that fills the sealed space, which is an incompressible fluid.
[0035]
1st invention and 2nd invention can be implemented with the installation which concerns on 5th invention, and 3rd invention and 4th invention can be implemented with the installation which concerns on 6th invention.
[0036]
According to the fifth invention, the filling space of the solidifying material can be defined by the earth retaining wall, the sealing means, and the second block, and according to the sixth invention, the earth retaining wall and the airtightness are sealed. It can be defined by means and blocks.
[0037]
In the fifth invention, when the first block is made of foamed plastic, the first block can be easily dissolved in a liquid state using an organic solvent, and the liquid substance can be easily eliminated. .
[0038]
When the first block made of foamed plastic is formed into an annular body, the amount of excavation of the first block by the tunnel excavator can be reduced, and the material cost can be reduced. The solidified liquid or mortar filling the space defined by the annular body contributes to a reduction in the amount of bending of the Nomst wall when the earth retaining wall is composed of the Nomst wall.
[0039]
The plurality of anchor members according to the fifth and sixth inventions are embedded in the solidifying material that remains on the removal trace when the first block and the liquid are removed, respectively, and is filled in the removal trace. Therefore, the joint of the well wall to the earth retaining wall can be further strengthened.
[0040]
The sealing means may be a casing when the groundwater pressure is relatively large, and may be a wall body connected to a solidified mortar or retaining wall when the groundwater pressure is relatively small.
[0041]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, for the formation of a tunnel 10, a tunnel excavator 14 is propelled in the ground from a start shaft (not shown) toward an arrival shaft 12.
[0042]
The reaching shaft 12 is defined by a retaining wall 16 having a cross-sectional shape such as a circle or a rectangle. The earth retaining wall 16 is a wall having a portion formed of a material that can be cut or excavated by the cutter head 22 described later, such as the Nomst wall.
[0043]
The illustrated tunnel excavator 14 is a shield type tunnel excavator. The excavator 14 is not limited to the shield excavator, but may be, for example, a pipe-propelled tunnel excavator.
[0044]
Each tunnel excavator is provided with a cylindrical (cylindrical or rectangular) main body, and a cutter head rotatably supported around the axis of the main body at the tip (front end in the propulsion direction) and receives thrust. In the meantime, the ground is excavated by the rotationally driven cutter head, finally the earth retaining wall 16 is excavated, and then reaches the reaching shaft 12.
[0045]
The tunnel excavator 14 that has excavated and penetrated the retaining wall 16 and reached the reaching shaft 12 is partially or entirely received by the method and equipment according to the present invention described later.
[0046]
The tunnel excavator 14 shown in the drawing, that is, the shield type tunnel excavator, includes the cylindrical main body 20 and the cutter head 22 as described above. A plurality of segment rings 24 that are formed by assembling a plurality of segments in a ring shape and that cover the wall surface of the site of the excavation by the tunnel excavator 14 preceding the main body 20 are connected in series.
[0047]
The shield machine 14 is propelled through the ground 26 with a reaction force applied to the segment ring 24 by an extension operation of a plurality of shield jacks (not shown) incorporated therein. In the pipe-promoting tunnel excavator, the excavator is propelled together with the pipe by applying a thrust to a pipe such as a concrete pipe arranged in series with the trace of the excavation. The thrust is applied by a main pushing device (not shown) composed of a hydraulic jack installed in the start shaft.
[0048]
When the excavator 14 digs into the retaining wall 16 and passes through the hole 28 (FIG. 2) drilled in the retaining wall 16 or passes through the hole 28 (FIG. 2), the excavator 14 partially or entirely reaches the main shaft 12. It is received by the receiving facility 30 according to the invention.
[0049]
When a part of the excavator 14 (only the cutter head 22 or a part of the cutter head 22 and the shield body 20) is received, only the cutter head 22 of the excavator is later separated and removed, and the shield body 20 is It is left in the reaching shaft 12 and the underground 26 and is made a part of the tunnel. When all of the excavator 14 (the cutter head 22 and the shield main body 20) is received, the excavator 14 is later removed for re-use for tunnel excavation using the reaching shaft 12 or another shaft as a start shaft. .
[0050]
First, a case where a part of the excavator 14 is accepted will be described.
[0051]
As shown in FIG. 1, the receiving device 30 of the present invention is installed in the reaching shaft 12 before the excavator 14 reaches the reaching shaft 12.
[0052]
The receiving device 30 includes a first block 32, a second block 34, and a sealing means 36.
[0053]
The first block 32 has a water-stopping property that is impermeable to water, is soluble, and is made of a material that can be excavated by the cutter head 22, for example, a foamed plastic material such as polystyrene foam.
[0054]
The first block 32 has a size or a planar shape in which a through hole 37 (see FIG. 2) can be formed by receiving the excavation action of the cutter head 22, and the excavation action of the cutter head 22 within the reach shaft 12. It is placed in a position where it can be received.
[0055]
The illustrated first block 32 is made of a plate-like body having a cross-sectional shape such as a rectangle or a circle, and is in contact with the earth retaining wall 16. It is also possible to arrange it at a distance from the earth retaining wall 16.
[0056]
The second block 34 is made of a solidified material having a water-stopping property and capable of being excavated by the cutter head 22, for example, a solidifying material such as an air mortar or a non-shrink mortar.
[0057]
The second block 34 has a thickness larger than the thickness dimension of the cutter head (the length in the propulsion direction of the tunnel excavator 14) so that the cutter head 22 that is a part of the tunnel excavator 14 can be received. It has a size and is arranged in front of the first block 32 (forward in the propulsion direction of the excavator 14).
[0058]
The second block 34 has the same cross-sectional shape as the first block 32, and is in contact with the front end face of the first block 32.
[0059]
The sealing means 36 consists of a box-shaped steel casing. Both blocks 32 and 34 are accommodated in the casing without any gap, and are supported by the earth retaining wall 16 via the casing.
[0060]
The casing has a flange portion 38 surrounding its open end, and is watertightly attached to the retaining wall 16 by a plurality of bolt and nut assemblies 40 extending through the flange portion 38.
[0061]
Therefore, the space between the first block 32 and the earth retaining wall 16 is sealed by the casing. In the illustrated example, the blocks 32 and 34 are also sealed by the casing.
[0062]
The second block 34 can be formed, for example, by injecting the solidifying material into the casing in which the first block 32 is disposed. Reference numeral 42 indicates a conduit attached to the casing for injecting the solidifying material into the casing.
[0063]
In the tunnel excavator 14 receiving method according to the present invention, the first block 32 and the second block are cut by the cutter head 22 by continuing the propulsion of the tunnel excavator 14 that excavates and penetrates the retaining wall 16. 34 are excavated sequentially. The tunnel excavator 14 is propelled until the entire cutter head 22 is hidden in the second block 34 (FIG. 2). The excavated pieces of both the blocks 32 and 34 can be taken into the tunnel excavator 14.
[0064]
As a result, the tunnel excavator 14 has a state in which the shield body 20 passes through the retaining wall 16 and the first block 32 and the cutter head 22 is located in the second block 34, that is, A part of the tunnel excavator 14 is placed in both the blocks 32 and 34.
[0065]
At this time, the receiving space 44 formed in both the blocks 32 and 34 communicates with the through hole 28 of the earth retaining wall, and groundwater and earth and sand flow into the receiving space 44. However, both the blocks 32 and 34 have water-stopping properties and are in contact with each other, and the first block 32 and the earth retaining wall 16 are sealed by the sealing means 36, and in the illustrated example, both the blocks Since the space 32 and the space 34 are supplementarily sealed by the sealing means 36, the groundwater and earth and sand are held in the receiving space 44 and do not leak into the reaching shaft 12 from the space. Thereby, the water stop accompanying the arrival of the tunnel excavator 14 into the reaching shaft 12 can be secured.
[0066]
Further, according to the present invention, when the retaining wall 16 is subjected to excavation by the tunnel excavator 14 and bends forward, the first block 32 in contact with the retaining wall 16 is replaced with the second block 34 and the sealing means 36. This resists under the support of, and reduces the degree of bending of the retaining wall 16. Thereby, excavation of the earth retaining wall 16 can be performed smoothly and efficiently.
[0067]
A plurality of screw jacks 46 and supporting members are provided between the sealing means 36 and the pit wall facing the front in order to apply a larger reaction force to the blocks 32 and 34 that receive the thrust of the tunnel excavator 14. 47 can be arranged.
[0068]
After receiving the tunnel excavator 14, an air mortar is provided in the gap 48 between the retaining wall 16 and the shield body 20 penetrating the retaining wall 16, preferably in the gap 44 between the shield body 20 and the first block 32. A filling material 50 made of water glass or the like is filled (FIG. 3). The filling material 50 can be filled, for example, by feeding the filling material from the shield body 20 into the gap 48.
[0069]
Thereafter, the first block 32 is dissolved, and the dissolved first block 32 is eliminated (FIG. 4).
[0070]
In the case of the first block 32 made of the styrene foam, it can be dissolved by allowing an organic solvent such as ethyl oxalate or acetone to act on the first block 32 to be liquefied. The organic solvent can be injected into the casing through a conduit 52 attached to the top of the casing, which is a sealing means 36.
[0071]
Further, the liquefied first block 32 can be discharged out of the casing through a conduit 54 attached to the lower portion of the casing.
[0072]
Both conduits 52, 54 are open to the space 56 (FIG. 4) in the casing, which is occupied or occupied by the first block 32.
[0073]
After the first block 32 is removed from the casing, a solidified material (hereinafter referred to as a solidified material in which the solidified product exhibits higher strength than the mortar or the like). In order to distinguish from a solidifying material such as mortar, it is referred to as “high-strength material”), for example, concrete material or synthetic resin material is filled.
[0074]
The high strength material can be introduced into the space 56 through a conduit 52 used to inject the organic solvent. The solidified material of the high-strength material surrounding the periphery of the shield body 20 (more specifically, the solidified material of the filling material 50) forms a well wall 58 that is an annular structure that reinforces the retaining wall 16 ( FIG. 5).
[0075]
According to this, construction of the well wall after the dismantling of the receiving facility 30 can be made unnecessary, and therefore work necessary for carrying in, assembling, and disassembling the formwork required for this is unnecessary.
[0076]
Although the well wall 58 is fixed to the retaining wall 16, a plurality of anchor members 60 that extend from the retaining wall into the well wall 58 are arranged on the retaining wall 16 in order to increase the degree thereof. Is desirable.
[0077]
The anchor member 60 can be installed when the retaining wall 16 is constructed. The anchor member 60 is excavated by the tunnel excavator 14 and is spaced around a hole (see reference numeral 28 in FIG. 2) that would result. Therefore, when the first block 32 is installed, the anchor member 60 is stabbed in a portion opposite to the peripheral portion of the hole (28), and the anchor member 60 extends in the first block 32 (FIG. 1). reference).
[0078]
Thereafter, the jack 46, the support material 47, the sealing means 36, the second block 34 inside thereof, and the cutter head 22 are disassembled and removed to expose the well wall 58. Since the second block 34 and the well wall 58 are connected in a so-called cold joint state, the separation of the second block 34 from the well wall 58 can be performed relatively easily.
[0079]
During this time, the gap 48 between the shield main body 20 and the earth retaining wall 16 is closed with the filling material 50, so that inflow of groundwater and earth and sand from the gap does not occur.
[0080]
The remaining shield body 20 is used as a part for defining the tunnel 10 together with the segment ring 24. Thereafter, a wall 62 made of, for example, concrete is provided in the reaching pit 12 so as to extend along the earth retaining wall 16 and to be continuous with the retaining wall 16 and to surround the pit wall 58 and to be connected thereto.
[0081]
By the way, the filling of the filling material 50 into the gap 48 after receiving the tunnel excavator 14 can be omitted. In this case, after the tunnel excavator 14 is received, the first block 32 is melted and removed without filling the filling material 50, and then the wellhead is formed in both the removal trace 56 and the gap 48. The high-strength material used to form the wall 58 is filled (FIG. 6).
[0082]
Moreover, it can replace with the 1st block 32 shown in FIG. 1 thru | or FIG. 5 and FIG. 6, respectively, and can make this into liquids (not shown) like water. In this case, a block (not shown) similar to the second block 34 is formed by placing, for example, the mortar with the open end of the casing, which is the sealing means 36 before mounting, facing upward, After the casing is attached to the retaining wall 16, the liquid is injected through the conduit 52 into the space between the block and the retaining wall 16 in the casing to fill the space.
[0083]
Since the liquid is an incompressible fluid, when the retaining wall 16 is subjected to excavation by the tunnel excavator 14, the liquid acts as a resistance against the bending of the retaining wall 16 like the first block 32.
[0084]
In this example, the cutter head 22 of the tunnel excavator 14 reaches the rear end of the block similar to the second block 34 through the sealed space defined by the sealing means 36 filled with the liquid, and the excavation thereof. To start. During this time, the pressure of the liquid in the sealed space is adjusted so as to counteract the groundwater pressure outside the reach shaft 12. The pressure is adjusted by using the conduits 52 and 54 to draw liquid into and out of the sealed space.
[0085]
After excavation of the block and filling of the filling material 50 as shown in FIG. 3, the liquid in the sealed space is removed through the conduit 54. Thereafter, the same steps as shown in FIGS. 4 to 5 are performed. While the liquid is excluded, the liquid may be replaced with the high-strength material by supplying the high-strength material. Moreover, you may employ | adopt the process shown in FIG.
[0086]
In addition, as shown in FIG. 7, the first block 32 can be made of an annular body, and the space defined by the annular body can be filled with a liquid 64 such as water.
[0087]
The annular body has an inner diameter that can be excavated by a cutter head 22 of a tunnel excavator. In this example, liquid inlet / outlet conduits 66 and 68 for adjusting the pressure of the liquid 64 in the casing are provided on the side of the casing as the sealing means 36.
[0088]
According to this, when the tunnel excavator 14 excavates the annular first block 32, the pressure-adjusted liquid between the shield body 20 and the first block 32 acts to counter the groundwater pressure. Eggplant.
[0089]
After excavation of the first block 32 and filling of the padding material 50 as shown in FIG. 3, the liquid 64 is removed through the conduit 68. Thereafter, the same steps as shown in FIGS. 4 to 5 are performed. Moreover, you may employ | adopt the process shown in FIG.
[0090]
Instead of the liquid 64, it can be filled with a solidified material of a solidifying material such as the mortar. Alternatively, the space defined by the annular body can be left hollow.
[0091]
The example in which the sealing means 36 is the casing is suitable when the groundwater pressure of the ground for propelling the tunnel excavator 14 is relatively high.
[0092]
When the groundwater pressure is relatively low, the sealing means 36 can be made of a solidified mortar 70 as shown in FIG.
[0093]
The solidified material 70 having water-stopping properties surrounds both the first and second blocks 32 and 34 in a cylindrical shape and is in watertight contact with the earth retaining wall 16, and supports both blocks 32 and 34 in a predetermined position. ing. Thereby, in addition to the space between the earth retaining wall 16 and the first block 32, the space between the blocks 32 and 34 is further sealed. In the illustrated example, the solidified product 70 is integrated with the second block 34. In order to facilitate understanding, the boundary between the solidified material 70 and the second block 34 is indicated by an imaginary line 72.
[0094]
Reference numeral 73 denotes a steel plate that is disposed between the first block 32 and the solidified material 70 and surrounds the first block 32 in a cylindrical shape and supports the conduits 52 and 54. A conduit 52 for injecting a solvent for dissolving the first block 32 and a conduit 54 for discharging the first block 32 after being dissolved in liquid form extend through the solidified material 70 to the outside thereof. ing.
[0095]
Also in this example, the well wall 58 as shown in FIG. 9 is formed through steps similar to those shown in FIGS. The solidified material 70 is removed from the reach shaft 12 together with the second block 32.
[0096]
The process as shown in FIG. 6 can also be applied to this example.
[0097]
In this example, the first block 32 can be replaced with a combination of the annular first block and the liquid 64 shown in FIG. The space defined by the annular first block 32 may be filled with a solidified mortar instead of the liquid 64, or may be hollow.
[0098]
Furthermore, it can replace with the 1st block 32 and can make this into a liquid similarly to the said example.
[0099]
As shown in FIG. 10, when the side wall 62 is provided in advance in the reaching shaft 12, a space 74 for arranging the first block 32 is secured in advance when the side wall 62 is constructed, and the first The side wall 62 surrounding the block 32 when it is arranged can be used as the sealing means 36.
[0100]
As in the example shown in FIG. 8, the second block 34 in contact with the first block 32 disposed in the space 74 is covered with the solidified material 70 and the inside of the reach shaft 12 through the solidified material. It is supported by.
[0101]
In this example, a conduit 52 for introducing a solvent for dissolving the first block 32 and a conduit 54 for discharging the liquefied first block 32 are respectively connected through the inside of the side wall 62. It extends to the outside.
[0102]
These conduits 52 and 54 are embedded in the side wall 62 during construction. Also, the conduits 52, 54 are filled with the high-strength material, such as concrete, that is injected after removal of the first block 32, and then cut and buried in the side wall 62.
[0103]
Also in this example, the well wall 58 as shown in FIG. 11 is formed through steps similar to those shown in FIGS. The solidified material 70 is removed from the reach shaft 12 together with the second block 32. Also in this example, the process shown in FIG. 6 can be applied. Furthermore, in this example, the first block 32 can be replaced with a combination of the annular first block and the liquid 64 shown in FIG. The space defined by the annular first block 32 may be filled with a solidified mortar instead of the liquid 64, or may be hollow. Furthermore, it can replace with the 1st block 32 and can make this into a liquid similarly to the said example.
[0104]
Next, a case where the entire excavator 14 is accepted will be described.
[0105]
In this case, as shown in FIG. 12, the second length having a length dimension (length dimension in the propulsion direction of the tunnel excavator) longer than the entire length of the excavator 14, that is, the cutter head 22 and the shield main body 20. A receiving facility 30 comprising a block 34 is prepared. Also, the casing that forms the sealing means 36 is prepared to have a length dimension that can accommodate both the first and second blocks 32 and 34. The heavier receiving equipment 30 is supported by a plurality of struts 76.
[0106]
Since the other configuration of the receiving facility 30 is the same as that of the receiving facility shown in FIGS. 1 to 5, the description thereof is omitted, and only the same reference numerals as those used in the drawing are given.
[0107]
As shown in FIG. 13, the tunnel excavator 14 that has excavated and penetrated the retaining wall 16 and reached the reaching vertical shaft 12 further excavated the first block 32, and after penetrating the first block 32, all of the tunnel excavator 14 Drill the block until it is received in the second block 34. During this time, the segment ring 24 is assembled behind the tunnel excavator 14. The assembled segment ring 24 passes through the hole 28 in the retaining wall and the hole 37 in the first block 32. When the tunnel excavator 14 is the other tunnel excavator, it is the pipe that penetrates the hole 28 and the hole 37.
[0108]
Thereafter, in the same manner as shown in FIG. 3, the clearance 44 between the shield machine 14 and the segment ring 24 and the blocks 32 and 34, and the clearance 48 between the rear segment ring 24 and the retaining wall 16. The filling material 50 is filled in and water is stopped (FIG. 14).
[0109]
Next, as shown in FIG. 4, an organic solvent is introduced into the casing through the conduit 52 to dissolve the first block 32 and make it into a liquid state. (FIG. 15).
[0110]
After that, as shown in FIG. 5, the high-strength material such as concrete or synthetic resin is sent from the conduit 52 to the removal trace 56 and filled therewith to construct the well wall 58 (FIG. 16).
[0111]
After the construction of the well wall 58, the components of the receiving facility 30 and the tunnel excavator 14, excluding the anchor member 60, are removed.
[0112]
The examples shown in FIGS. 12 to 16 are also suitable when the groundwater pressure is relatively high, like the examples shown in FIGS.
[0113]
Also in the example shown in FIGS. 12 to 16, as in the step shown in FIG. 6, the gap 48 can be filled with the high-strength material without filling the gap 48 with the filling material 50.
[0114]
In this example, the first block 32 can be replaced with a combination of the annular first block and the liquid 64 shown in FIG. The space defined by the annular first block 32 may be filled with a solidified mortar instead of the liquid 64, or may be hollow.
[0115]
Furthermore, it can replace with the 1st block 32 and can make this into a liquid similarly to the said example.
[0116]
When the groundwater pressure is relatively low, the sealing means 36 made of the solidified material 70 similar to the example shown in FIG. 8 can be applied instead of using the casing as the sealing means 36 (FIG. 17). However, in order to obtain the second block 34 and the sealing means 36 having a large length, unlike the example shown in FIG. 8, these are solidified mortars that are placed so as to completely fill the bottom of the reach shaft 12. It is formed by things.
[0117]
As shown in FIG. 18, when the side wall 62 is formed in advance, the sealing means 36 can be the side wall 62 surrounding the first block 32 as in the example shown in FIG. . Also in this example, in order to obtain the second block 34 having a large length enough to receive the entire tunnel excavator 14, the second block 34 and the solidified material 70 are formed upright as in the example shown in FIG. 17. It is formed of a solidified mortar that fills the entire bottom of the pit 12.
[0118]
Also in the example shown in FIGS. 16 to 18, the process as shown in FIG. 6 can be applied.
[0119]
In these examples, the first block 32 can be replaced with a combination of the annular first block and the liquid 64 shown in FIG. The space defined by the annular first block 32 may be filled with a solidified mortar instead of the liquid 64, or may be hollow.
[0120]
Furthermore, it can replace with the 1st block 32 and can make this into a liquid similarly to the said example.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a state in which a tunnel excavator is propelled in the ground toward a reaching shaft.
FIG. 2 is a longitudinal sectional view showing a state in which the tunnel excavator is received by a receiving facility in a reaching shaft.
FIG. 3 is a longitudinal sectional view showing a state in which a filling material is filled between the earth retaining wall and the receiving facility and the tunnel excavator.
FIG. 4 is a longitudinal sectional view showing a state in which a first block is removed.
FIG. 5 is a longitudinal sectional view showing a state where a cutter head of a tunnel excavator is removed after a removal wall of a first block is filled with a high-strength material to construct a wellhead wall that is an annular structure.
FIG. 6 is a longitudinal sectional view showing a state in which a removal strength of the first block and a gap between the retaining wall and the tunnel excavator are filled with a high-strength material.
FIG. 7 is a longitudinal sectional view similar to FIG. 1 when the first block of the receiving facility is an annular body.
FIG. 8 is a longitudinal sectional view similar to FIG. 1 when the sealing means of the receiving facility is a solidified product of mortar.
9 is a longitudinal sectional view similar to FIG. 5, showing the example shown in FIG.
10 is a longitudinal sectional view similar to FIG. 1 when the sealing means of the receiving facility is a side wall constructed along the earth retaining wall. FIG.
11 is a longitudinal sectional view similar to FIG. 5 for the example shown in FIG.
FIG. 12 is a longitudinal sectional view similar to FIG. 1 in the case where the entire tunnel excavator is received.
FIG. 13 is a longitudinal sectional view similar to FIG. 2 in the case where the entire tunnel excavator is received.
FIG. 14 is a longitudinal sectional view similar to FIG. 3 in the case where the entire tunnel excavator is received.
FIG. 15 is a longitudinal sectional view similar to FIG. 4 in the case where the entire tunnel excavator is received.
FIG. 16 is a longitudinal sectional view similar to FIG. 5 in the case where the entire tunnel excavator is received.
FIG. 17 is a longitudinal sectional view similar to FIG. 13 when the sealing means of the receiving facility is a solidified product of mortar.
18 is a longitudinal sectional view similar to FIG. 13 in the case where the sealing means of the receiving facility is a side wall constructed along the earth retaining wall. FIG.
[Explanation of symbols]
12 Reaching shaft
14 Tunnel excavator
16 Earth retaining wall
24 segment ring
28 Excavation holes drilled in the retaining wall
30 Acceptance facilities
32, 34, 36 first block, second block and sealing means
48 Clearance
50 padding
56 Removal of the first block
58 Wellhead wall (annular structure)
60 anchor parts

Claims (22)

A tunnel excavator receiving method that has been propelled in the ground and excavated the retaining wall of the reaching shaft, and has reached this, and is installed in the reaching shaft before reaching the tunnel excavator. A first block that is water-soluble and dissolvable, the first block being sealed between the retaining wall and the second block having water-stopping contact with the first block; A tunnel excavator penetrates the first block and sequentially excavates so that a part of the tunnel excavator reaches the second block, dissolving the first block, A method for receiving a tunnel excavator, comprising: eliminating a first block; and filling a material having solidification properties in an exclusion mark of the first block. A tunnel excavator that has been propelled in the ground and excavated the retaining wall of a reach shaft and reached it, and a subsequent method for receiving a segment ring or pipe, wherein the reach stand before the tunnel excavator arrives A first block which is installed in a mine and has a water-stopping property and is dissolvable, and has a water-blocking property in contact with the first block, which is sealed between the retaining wall and the first block. Sequentially excavating a second block such that the tunnel excavator and subsequent segment rings or tubes pass through the first block and all of the tunnel excavator goes into the second block; Dissolving the first block, removing the dissolved first block, and filling a solidified material in an exclusion trace of the first block. No, accepted method of tunnel boring machine. A method of accepting a tunnel excavator that has been propelled in the ground and excavated the earth retaining wall of a reach shaft and reached the tunnel wall, wherein the water stop installed in the reach shaft before reaching the tunnel excavator After the tunnel excavator penetrates a sealed space provided between the block and the retaining wall and filled with liquid, a part of the tunnel excavator reaches the block. A method for receiving a tunnel excavator, comprising: excavating, removing liquid in the sealed space, and filling the liquid removal trace with a solidifying material. A tunnel excavator that has been propelled in the ground and excavated the retaining wall of a reach shaft and reached it, and a subsequent method for receiving a segment ring or pipe, wherein the reach stand before the tunnel excavator arrives After the tunnel excavator penetrates a sealed space provided between the block and the earth retaining wall and filled with liquid, the tunnel excavator is installed in the mine. A method for receiving a tunnel excavator, comprising: excavating to reach the block; removing liquid in the sealed space; and filling the liquid removal trace with a solidifying material. The method according to claim 1, wherein a filling material is filled in a gap between the tunnel excavator and the retaining wall prior to melting of the first block. The method according to claim 2, wherein a filling material is filled in a gap between the segment ring or pipe and the retaining wall prior to the dissolution of the first block. The method of claim 3, wherein a filling material is filled in a gap between the tunnel excavator and the retaining wall prior to the removal of the liquid. 5. A method according to claim 4, wherein a filling material is filled in the gap between the segment ring or tube and the retaining wall prior to the removal of the liquid. The method according to claim 1 or 3, wherein, in addition to the exclusion trace, a gap between the tunnel excavator and the retaining wall is filled with the solidifying material. The method according to claim 2 or 4, wherein, in addition to the exclusion trace, a gap between the segment ring or tube and the retaining wall is filled with the solidifying material. A tunnel excavator receiving equipment that has been propelled in the ground and excavated the earth retaining wall of the reaching shaft, and has reached this, has a water-stopping property and is dissolvable disposed in the reaching shaft. A first block that is penetrated by receiving the excavation action of the tunnel excavator; and a second block that is in contact with the first block and has water-stopping capability. A receiving facility for a tunnel excavator, comprising: a second block capable of receiving a part or all of the excavation action and a sealing means for sealing between the first block and the retaining wall. A tunnel excavator receiving equipment that has been propelled in the ground and excavated a retaining wall of a reach shaft, and has reached the tunnel wall, and is a block having a water-stop structure disposed in the reach shaft and having the tunnel A block that is capable of receiving a part or all of the excavator by being excavated; and a sealed space filled with liquid that allows the tunnel excavator to pass between the block and the retaining wall. A tunnel excavator receiving facility including a sealing means to regulate. Furthermore, it is a plurality of anchor members provided on the retaining wall, and includes a plurality of anchor members extending from the retaining wall to a portion other than the portion penetrated by the tunnel excavator of the first block. The facility according to claim 11. Furthermore, it is a plurality of anchor members provided on the earth retaining wall, and includes a plurality of anchor members extending from the earth retaining wall to a portion other than a portion penetrated by the tunnel excavator of the sealed space. 12. Equipment according to 12. The facility of claim 11, wherein the first block is made of a foamed plastic material. The equipment according to claim 15, wherein the first block is made of an annular body, and a space defined by the annular body is filled with a solidified liquid or mortar. The equipment according to claim 11, wherein the second block is made of a solidified product of mortar. The equipment according to claim 12, wherein the block is made of a solidified mortar. The facility according to claim 11, wherein the sealing means includes a casing that houses the first block and the second block. The installation according to claim 12, wherein the sealing means comprises a casing for containing the liquid and the block. The equipment according to claim 11, wherein the sealing means is made of solidified mortar. The facility according to claim 11 or 12, wherein the sealing means includes a wall body provided in the reaching shaft and continuing to the retaining wall.

Images