JP6239686B2 - Construction material of tunnel shaft internal structure, construction lift and material transport cart - Google Patents

Description

  The present invention relates to a construction member for a shaft internal structure, a construction lift, and a material transport carriage for a large-section tunnel in an urban area or the like.

  The construction procedures for shafts and shields of large-section tunnels used for roads and railways are to build rectangular and circular retaining walls and shafts, and use them as starting and reaching shafts. Subsequently, after completion of the shaft construction, a shield machine divided on a predetermined mount is assembled integrally at the bottom of the start shaft using a large crane. Next, power / control equipment (hereinafter referred to as “follow-up equipment”), excavation soil carry-out equipment and material / material transport equipment for the shield machine will be installed in the ground yard, and then the shield machine will be installed from the entrance of the previously established start shaft. Penetration into the ground and start.

  After such initial excavation of the shield machine (hereinafter referred to as “initial excavation”), the subsequent equipment is moved here at a stage where the space can be secured in the tunnel mine behind the shield machine. On the other hand, excavated soil unloading equipment, equipment transporting equipment and soundproof house will be redeveloped on the ground, and a construction lift will be installed on the starting shaft for carrying the lining segment. In addition, full-scale excavation (hereinafter referred to as “main excavation”) is started to the reaching shaft.

  After arrival, dismantle the shield machine and the following equipment from the compatible mine, and remove the lift for the construction of the start pit. Next, in the vacant space inside the compatible pit, as a construction work inside the shaft, floor slabs and pillars are built inside the shaft in order from the bottom to the top. Remove. Then, permanent equipment such as a permanent lift and ventilation equipment was installed, and after the construction of tunnel tunnel facilities was completed, the construction was completed.

  Here, in the case of assembling a shield machine having a large cross section, the total weight reaches 3000 tf. The accompanying equipment and materials and equipment transportation facilities such as construction lifts accompanying this are large in scale, and it usually takes about one year to construct them. After that, it takes about half a year for the initial excavation and several years for the main excavation. After completion, it takes several years to complete the construction of the vertical shaft, including the installation of the main lift and ventilation equipment, and the construction of the tunnel mine, after removing materials and equipment transport equipment such as a construction lift. In this way, in the case of a large cross section, the construction period was usually prolonged.

  In addition, a soundproof house to be installed on a work shaft for shafts and shield construction, which is installed on roads essential for noise countermeasures in urban areas, will be installed after the large crane that obstructs this roof is no longer necessary after the shield machine is assembled. . After the main excavation for day and night ends and the shield machine arrives, the soundproof house is no longer necessary, so it is dismantled, and after the construction is completed, the work zone is removed and the road is released.

  Therefore, the longer construction period will worsen the deterioration of urban functions due to traffic congestion due to occupation of work zones. The serious situation described above is due to the fact that no shield shortening method has been found that can simultaneously perform shield tunneling work (initial drilling and main drilling), shaft internal construction work, and tunnel tunnel equipment construction. To do.

Japanese Patent Laid-Open No. 7-71197 JP-A-57-38283

  Patent Document 1 discloses a lift for transporting a segment placed on a pallet from the ground to the bottom of the shaft as a shaft segment transporting device.

  Patent Document 2 discloses a general construction lift in which a hoisting machine is disposed at the upper end and a counterweight and a cage are disposed below.

  Here, the shaft segment conveying apparatus described in Patent Document 1 can be conveyed to the bottom of the shaft mechanically by loading the segments onto the pallet with a forklift on the ground, and is efficient in that respect. However, specializing in segment transportation, workers and other piping materials could not be transported, and convenience was poor. On the other hand, when using a general lift for construction shown in Patent Document 2 and the like, it can be used for other purposes such as other piping materials in addition to the segments, so it is convenient, but it is mechanized for loading and transshipment. The efficiency is further deteriorated. In any case, conventional construction lift technology is not sufficient for shaft and shield construction.

In the first place, in the internal structure of a vertical shaft, since floor slabs and pillars are generally constructed by stacking formwork support works in order from the bottom to the top, distribution to the tunnel shaft is interrupted. Therefore, since the main lift installed after the vertical shaft construction work cannot be used for shield excavation work or tunnel tunnel equipment construction, a separate work lift and a temporary support column for supporting the work are required.
Above all, due to the problem of logistics disruption, there was no way to carry out shaft shaft construction work, shield tunneling work and tunnel tunnel equipment work in parallel, and the construction period was greatly delayed.

The problems related to the prior art work lift and the shaft internal structure have been described in detail above.
1) Conventional shaft segment transport devices are specialized for segment transport, and cannot deliver other piping materials, rail materials, and workers necessary for excavation, and lack convenience.

2) General construction lifts were not mechanized in terms of segment loading and re-loading, deteriorating efficiency.

3) The construction lift is installed after the shield machine starts from the bottom of the shaft as the initial excavation, and the space is vacant. After the shield machine arrives, it is removed before starting the construction work inside the shaft. Was empty. For this reason, installation / removal entered the critical path of the construction period, causing delays in the construction period.

4) Generally, in the construction work inside the shaft, the floor slabs and pillars are built in order from the bottom to the top. It was impossible to work in parallel with the construction work, which caused the construction period to be delayed.

5) The construction lift is only temporary, and the advanced use of the main lift, which presupposes part of the construction work inside the vertical shaft, will be disrupted by the construction of the shield digging work. It was impossible to do so.

6) Because the lift for construction is mostly installed in contact with the inner wall surface of the shaft for the convenience of supporting the guide, there is a distance in the delivery of the segment between the inner wall surface of the shaft and the rail on the center side of the tunnel shaft. For the delivery, separate mechanical equipment was required, which led to a decline in logistics efficiency.

7) The internal structure of the shaft will require a construction period and cost for supporting works and scaffolds arranged vertically. Therefore, when precasting is required, in the case of precasting, the members are heavy, and the crane is enlarged, so the crane boom and crane become an obstacle to the soundproof house roof and other equipment transportation equipment and excavation equipment, Hiring was difficult.

8) The shaft internal structure is precast and constructed in parallel with the shield excavation work, so that the construction period will not be hindered to shorten the construction period, but will not interfere with the equipment transport equipment and shield excavation equipment installed in the shaft. The actual situation is that no procedures are provided.

9) If the shaft internal structure is a shield machine assembly or initial excavation stage, there is space in the area other than the bottom of the shaft, so if it can be built, the construction period will be shortened, but the column material supporting the load will interfere with the shield machine. Actually, it was not established as a construction method.

10) The construction lift that can simultaneously perform the shaft internal construction work, shield tunneling work, and tunnel tunnel equipment construction was not realized because there was no shaft internal structure and assembly procedure that would not disrupt logistics, and the construction delay was normal .

Furthermore, the equipment and materials transport equipment and the construction lifts used for shield excavation work have the following problems.
11) There is no physical distribution management system and equipment that can record and confirm the location and status of each material in time series to every corner of a long tunnel using computer communication. For this reason, there is a lack of efficiency in preventing erroneous conveyance and replenishment of missing parts.

12) There is no seamless physical distribution facility from the ground yard to every corner of a long tunnel mine that does not require delivery of materials and equipment. Therefore, efficiency is lacking.

13) The segment, which is a concrete secondary product, is heavy, and when it is transported efficiently and stably into the mine, the construction lift is greatly swayed, and there is a lot of time loss and damage during transshipment. Therefore, efficiency and stability are lacking.

  In order to solve the above-mentioned problem, the construction member of the tunnel internal structure of the tunnel according to the present invention has a rectangular diagonal in the vicinity of the inner wall surface of the shaft on the same horizontal plane so that the axial direction of the tunnel coincides with its own direction. The four intersections provided, a horizontal member that connects the adjacent intersections orthogonally, a column member that connects each of the intersections vertically with each of the corresponding intersections of the layers adjacent in the vertical direction, and the intersection And a connecting member that individually connects each of the connecting portions provided on the inner wall surface, and includes a construction member made of a precast member having at least a well-shaped structure in a plan view, and a layer adjacent to the vertical direction by the pillar material It is characterized by having a multi-layered structure in which a plurality of the construction members are stacked by being connected to. Moreover, the said connection material enables adjustment of the separation of the position of a pillar material, and the inner wall face of a shaft. Further, the diagonal member that supports the cross member and the column member by connecting to the cross member and the column member arranged as the lowest cross point located on the upper surface from the inner wall of the shaft or the ridge protruding directly above the tunnel. Have

  According to the present invention, in the construction lift, the guide for raising and lowering the cage is held by the horizontal member inside the well-shaped structure, and the column member that supports the horizontal member is from the upper surface of the fence at the initial excavation stage. The guide is extended to the lower shaft bottom after starting the shield machine while being supported by diagonal members. With the work lift according to the present invention, the following effects can be obtained.

A Since it can be installed in advance as a permanent lift, it is not necessary to remove it in the construction of the shaft after the shield machine arrives, so it can be used continuously, making it unnecessary to use a temporary lift and reducing the work period and cost.

In the first half, pillars and horizontal members can be installed during the initial excavation in the first half, and the floor, stairs, and ventilation equipment for the main building are installed in the first half for shield excavation work outside the well. If the power line and piping are removed, it can be installed without any trouble in the distribution of tunnel tunnel equipment construction, so other construction will not be hindered.

C) Not only shield excavation work, but also the construction of shafts and the construction of tunnel tunnels will not be interrupted at all times, improving the efficiency of the entire work.

The guide for raising and lowering the cage is attached to the horizontal material inside the well without touching the inner wall of the shaft, so that the rail in the cage that moves up and down can be lowered and connected directly to the rail near the center of the tunnel shaft. . As a result, since the segment carriage in the cage can be directly entered into the rail in the tunnel mine, it is possible to omit the segment delivery equipment and work required when the guide is in contact with the vertical wall of the shaft, Cycle time is shortened.

In the ground yard, rails are arranged in the axial direction of the tunnel as in the tunnel mine, so that the carriage inside the cage can be directly connected to both rails in the axial direction from the short side opening and closing port. As a result, other piping materials and rail materials necessary for excavation from the ground can be seamlessly entered into the tunnel mine, thereby improving distribution efficiency.

There is no need for a temporary support column or temporary bracket to hold the guide for raising and lowering the cage, thus reducing costs.

Since the construction lift is not a dedicated transport device, it is possible to transport tire vehicles and workers when there is no truck loaded. Further, in the tunnel mine, if the lower part of the floor slab is used as the transport path for the segment carriage, the upper part of the floor slab is used as the transport path for the Pca floor slab, and the cage is stopped at both two levels, both materials can be transported efficiently.

The cage loaded with the k-segment truck is heavy, and the weight of the cage, pulleys that receive the counterweight, and the hoisting machine can be stably supported by the pillar material through the solid material of the solid well-shaped structure. It can be suppressed and lifted smoothly.

I When operating a lift for construction work, it is possible to operate at high speed while suppressing abnormal vibrations and inclinations, etc., because it controls and synchronizes a plurality of hoisting machines while measuring and managing the level and lifting speed at the cage level.

  Next, the vertical shaft internal structure according to the present invention is a multi-layered structure of well-shaped construction members that preassembles precast members and intersects with crossing members. Are connected by a horizontal member, and supported by a diagonal member on the upper surface of the eaves below the column member, and the cross member and the inner wall surface of the shaft are connected and held while the separation is adjusted by the connecting member. Thereby, the following effects can be obtained.

As a result of co-casting, the formwork support work that is assembled in order from the bottom of the shaft becomes unnecessary, and distribution to the tunnel mine is not interrupted during construction. Therefore, shield excavation work and tunnel pit equipment work to be performed in parallel are not delayed.

By installing the diagonal material, even if the shield machine divided at the bottom of the shaft is assembled at the initial excavation stage, the assembly of the precast member is not hindered. Therefore, these precast members can be assembled efficiently and efficiently with a large crane for assembling a shield machine, and a new large crane is not required and the construction period and cost can be reduced.

With the function of diagonal materials, the precast member of the shaft internal structure can be assembled during the initial excavation after the shield machine assembly, so it can be used as one large crane, and the problem of hindering the roof of the soundproof house of the crane boom is In the initial excavation, only the walls are installed in advance to achieve the minimum sound insulation, and the remaining roof can be removed by installing a large crane before the full day and night noise of the main excavation. Sound insulation is possible. As a result, the entire construction period can be shortened smoothly without causing noise to spread to the periphery.

Depending on the characteristics of the members, the diagonal members may be placed as a compression member against the column load, diagonally inside the column material above the vicinity of the intersection between the shaft inner wall surface and the upper surface of the shaft. Further, the diagonal member may be disposed as a tensile member diagonally outward from the intersection of the horizontal member and the pillar member of an arbitrary layer to the connecting portion of the connecting member on the inner wall surface of the vertical shaft. Thereby, the structure of a precast member can be selected freely.

During the initial excavation, which mainly involves machine adjustment for daytime work, most of the precast members of the shaft internal structure using diagonal materials are constructed above it for nighttime work. After that, if the shield machine penetrates into the ground and starts, the bottom pillar is extended with the lift guide in the empty space at the bottom of the shaft. And the entire construction period can be shortened without waste.

The pillar material has a hollow precast structure, and after the shield machine starts, the bottom pillar material is extended to the bottom of the shaft, and the interior is filled with concrete with high load resistance against axial compression force. The diagonal is removed and replaced. Thereby, in a temporary system, a lightweight hollow precast material can be assembled in a short period of time, and in a completed system, it can be set as a structure which can endure a heavy equipment load.

The cross members can divide each member in 6 directions (horizontal front and back, left and right and vertical top and bottom), so each precast material is subdivided, and there is a problem in the case that it is impossible to lift on the crane capacity or transport on public roads. Solve. Conversely, since it can be integrated as long as there is no hindrance, the efficiency of erection and transportation can be maximized.

H Cross members can be divided into 6 directions (horizontal front / back / left / right and vertical top / bottom) freely, so when connecting, two connecting materials that can finely adjust the separation between the pillar material and the inner wall surface of the shaft are integrated in advance. This flat position can be fixed accurately and efficiently. The horizontal material to be installed can be immediately installed with power lines, piping, belt conveyors, ascending / descending stairs, etc. for shield excavation work. Therefore, the assembly of these precast members does not cause a delay in the initial excavation process.

Tsu At the time of erection, if at least the crossing member and the horizontal member are integrated horizontally in a rectangular shape with a large crane in advance in the ground yard, and if they are erected integrally with the four pillar members that have already been erected, further initial digging The process can be shortened. On the other hand,

As a reinforcing material, the overall rigidity can be remarkably improved by adding fire struts to the intersections and new pillars to the horizontal joints. Moreover, if floors and stairs are attached to a horizontal member in advance, the construction work inside the shaft can be simplified and the construction period can be shortened.

G Since the horizontal material matches the axial direction of the tunnel, the power line, piping, belt conveyor, elevating stairs, etc. for shield excavation work can be installed immediately outside the well during assembly. There is no inconvenience in equipment because a lift and a material loading opening can be installed. Therefore, the initial excavation and the main excavation are made efficient, and this does not select a rectangular or circular shaft shape.

If all of the well-shaped construction members are made of metal, the construction will be speeded up, for example, by laying multiple layers together.

As for the horizontal material in the tunnel crossing direction that constitutes the well-shaped construction member, a new pillar material that blocks the underground logistics at the bottom of the shaft cannot be placed as a reinforcing material. In the stage, the steel material is arranged in an external post-tensioned prestressed concrete structure with a reinforcement to enclose the steel material. According to this, since the girder rigidity can be increased, the material cost can be further reduced as compared with the full metal.

Since a well-shaped construction member is constructed prior to the initial excavation, it can replace temporary stages and temporary brackets for power lines and piping, belt conveyors, elevating stairs, etc. that are normally required for shield excavation work. This cost can be reduced.

The connecting material is joined to the receiving material of the cross section of the box that is anchored to the inner wall in advance at the connecting part of the inner wall of the shaft, and the anchor protruding from the connecting material side is joined by mortar fixing. The distance from the wall can be adjusted freely. Therefore, even if the construction accuracy of the inner wall surface of the shaft shaft is poor, the shaft internal structure can be installed with high accuracy.

Since the connecting material adjusts the position of the column material in two directions with a temporary bolt with a receiving material fixed in advance to the inner wall surface of the shaft, the efficiency of the construction is good.

C The connection part can be freely changed in rigidity according to the diameter and number of anchors integrating the connecting material and the receiving material, the mortar strength, etc., and the degree of freedom in design can be expanded.

The connecting part is constructed so that the mortar part that anchors the anchor that integrates the connecting material and the receiving material is locally damaged against earthquake vibration, thereby improving the earthquake resistance and preventing damage to the shaft structure. The cost of recovery can be minimized.

  Furthermore, for material transportation according to the present invention, rails are laid in the tunnel axial direction inside the cage, on the ground yard and in the mine, and an IC tag reader is mounted on the material transportation carriage. An IC tag indicating the position is installed at each position and distance. Then, by reading these IC tags with an IC tag reader mounted on the material transport carriage and performing remote centralized management in time series, the following effects can be obtained.

It is possible to remotely manage the location and situation of the time series for each material that exists on the seamless rail that runs through every corner of the tunnel, thus preventing erroneous transport and improving the efficiency of stocking missing items.

If the IC tag is also provided in each worker's helmet, etc., the accuracy of labor and safety management can be improved.

E. It is possible to improve the efficiency and accuracy of the article management and quality control of the entire construction from shield excavation work, vertical shaft construction work and tunnel tunnel construction work.

The rails laid in the ground yard above the vertical shaft can be stably supported by the pillar material through the horizontal material of the solid well-shaped structure, so there is no need for a bridge at the top of the vertical shaft and the structural stability is high.

FIG. 1 is a diagram showing an overview of the construction of a work lift from the direction of the cross section (width) of the tunnel. FIG. 2 is an enlarged view of the structure in the vicinity of the machine room and the structure in the vicinity of the tunnel in FIG. FIG. 3 is a diagram showing an overview of the construction of the work lift from the longitudinal section (longitudinal) direction of the tunnel. FIG. 4 is an enlarged view of the structure in the vicinity of the machine room and the structure in the vicinity of the tunnel in FIG. FIG. 5 is a view showing a cross section at each position in the vertical direction in the shaft of the work lift. FIG. 6 is a diagram illustrating a point in time when the basic shape is formed by digging the vertical shaft to the excavation position of the tunnel. FIG. 7 is a diagram illustrating a point in time when the shield machine is brought into the tunnel excavation position. FIG. 8 is a view showing a point in time when the first-layer well-shaped structure is provided on the shaft shaft. FIG. 9 is a diagram illustrating a point in time when the shaft internal structure is constructed above the vertical surface of the shaft shaft. FIG. 10 is a diagram showing a point in time when construction of the shaft structure remaining at the bottom of the shaft is started. FIG. 11 is a diagram illustrating a point in time when the internal structure of the shaft is completed, the construction lift is installed, and the segment cart is lowered to the bottom of the shaft. FIG. 12 is a plan view showing a state where the segment cart lowered to the bottom of the shaft by the cage is connected to the material transport cart. FIG. 13 is a diagram illustrating a case where the diagonal member is arranged in a form that acts as a tension member. FIG. 14 is a diagram illustrating a procedure for fitting the cross member and the column member. FIG. 15 is a diagram showing a procedure for installing the connecting material while finely adjusting the separation between the shaft inner wall surface and the pillar material. FIG. 16 is a diagram showing a structure of a hollow precast column material. FIG. 17 is a diagram showing a fitting procedure in the case of a hollow precast column. FIG. 18 is a diagram illustrating a process (step d to step f) for constructing a well-shaped structure from the bottom of a vertical shaft. FIG. 19 is a diagram illustrating steps (step g to step i) for constructing a well-shaped structure from the bottom of a vertical shaft. FIG. 20 is a diagram illustrating an example of a shaft / shield construction process.

  As modes for carrying out the present invention, embodiments according to the present invention will be described below with reference to the drawings. That is, a suitable example of the shaft internal structure, an example in which the shaft internal construction work, the shield tunneling work, and the tunnel tunnel equipment work are simultaneously performed will be described.

(1) Construction Lift FIG. 1 is a diagram showing an overview of the construction of a construction lift provided inside a shaft from the direction of the cross section (width) of the tunnel. FIG. 2 is an enlarged view of the structure in the vicinity of the machine room 4 on the ground (upper figure) and the structure in the vicinity of the tunnel including the cage 1 (lower figure) in FIG.

  The construction lift is a device that lifts and lowers the balance weight 2 for balancing the cage 1 and its weight between the ground in the shaft and the tunnel. The hoisting machine 3 for raising and lowering is composed of a plurality of units, and is installed on the upper part of the machine room 4 installed immediately above the shaft while being supported by a material column. During operation, a plurality of hoisting machines 3 are synchronously controlled while measuring and managing the levelness of the cage level and the lifting speed.

  As shown in FIG. 2, the vertical shaft is formed by a well-shaped structure including a horizontal member 6 and a vertical column member 5 that supports the horizontal member 6. The pillar material 5 is finally formed up to the tunnel position, and is a structure supported by the diagonal material from the upper surface of the eaves before the shield machine starts at the time of initial excavation. This point will be described later.

  The lifting guide for the construction lift is held by a horizontal member inside the well-shaped structure. The construction lift is installed such that the rear surface of the cage 1 (facing the opening / closing opening) is located at one end surface in the transverse direction of the tunnel.

  FIG. 3 is a view showing an overview of the structure of the work lift provided inside the shaft from the longitudinal section (longitudinal) direction of the tunnel. FIG. 4 is an enlarged view of the structure in the vicinity of the machine room 4 on the ground in FIG. 3 (upper figure) and the structure in the vicinity of the tunnel including the cage (lower figure).

  The segment cart 11 transported by the material transport cart 9 on the ground side is carried into the cage 1 in unit units (two units in the figure), and the cage 1 is lowered to the tunnel position by the hoisting machine 3. When the segment cart 11 reaches the tunnel position, it is connected to another material transport cart 9 that transports the inside of the tunnel, and moves in the tunnel.

  FIG. 5 is a diagram (plan view) showing a cross section at each position in the vertical direction in the shaft of the construction lift, for example, a plan view of the cross section of the arrow shown in FIG. FIG. 5A is a plan view at the installation position of the hoisting machine 3 in the machine room 4, FIG. 5B is a plan view of a section in the shaft, and FIG. 5C is at the tunnel position. FIG. 5 (d) is a plan view when the cage 1 at the tunnel position is loaded with the segment carriage 11 and connected to the material transport carriage 9.

  As shown in FIGS. 5A to 5C, the cage 1 and the counterweight 2 are directly connected to each other at four points via a pulley by a wire. The plurality of hoisting machines 3 are installed point-symmetrically on the upper part of the machine room 4 (FIG. 5A), and wires are connected to the upper surface of the cage 1 in a point-symmetrical manner from the plural hoisting machines 3 via pulleys. Transmits lifting power. As for the pulley, the weight of the cage 1 and the counterweight 2 is received. However, since the pulley is disposed in the machine room 4 above the column member 5, the weight is stably supported by the column member 5. Moreover, as shown in FIG.5 (b), the guide 8 used as the guide at the time of raising / lowering of the cage 1 and the balance weight 2 and the guide frame 7 are installed and hold | maintained inside the well-shaped structure of a shaft.

(2) Vertical shaft internal structure The internal structure of the vertical shaft is divided into six steps from the generation of the vertical shaft to the initial formation of the internal structure and the final internal structure through the installation of the construction lift. To do.
FIGS. 6-11 is a figure which shows the process until the internal structure construction of a shaft as steps 1-6.
FIG. 6 is a diagram showing a point in time when the basic shape of the shaft shaft is formed after stepping down to the excavation position of the tunnel after the installation of the retaining wall as Step 1.

  The vertical shaft according to the present invention is characterized in that a vertical surface on which a diagonal member, which will be described later, can be installed, is provided at a predetermined height in the middle of the vertical shaft. As a vertical shaft, a retaining wall is first formed, and then a vertical shaft body is formed, and a vertical surface is formed at that time. Here, the upper surface of the ridge may be horizontal or inclined. While the former is easy to build, there is a fear of weakness due to stress concentration, and the latter has the opposite feature. Moreover, as shown in the A sectional plan view of FIG. 6, an entrance opening for starting tunnel excavation is formed, so that the water stop performance at the time of penetration of the shield machine can be secured, and cutting and excavation can be performed. By increasing the wall thickness below the buttocks compared to the upper part, there is an effect of compensating for a decrease in the proof stress of the structural wall against the cross-sectional defect of the entrance opening. On the other hand, in the ground yard, a soundproof wall for insulating construction noise is installed around the work zone at a certain height.

  FIG. 7 is a diagram showing a point in time when the shield machine is carried in as Step 2. A large crane for assembling the shield machine is installed in the ground yard, and the divided shield machine brought to the ground yard is sequentially unloaded to the excavation position of the tunnel at the bottom of the shaft using this large crane. A stand is provided at the bottom of the shaft, and the shield machine divided thereon is placed while being assembled together by a large crane. As shown in the B cross-sectional plan view of FIG. 7, the shield machine is placed with the cutter face facing the entrance side. In the ground yard, a soundproof house with a soundproof wall covered with a roof will be installed. However, the operating range and period of the large crane is limited to the necessary sound insulation only by the walls that cause the roof to be damaged because the crane boom is obstructed and a part of the roof must be damaged.

  FIG. 8 is a diagram showing a point in time when the first-layer well-shaped structure is provided in the vertical shaft as Step 3. As this first layer, diagonal members 24 and connecting members 23 combined with the crossing members 22 are installed diagonally diagonally to form the arrangement structure shown in the D sectional plan view of FIG. To do. As an installation procedure, as shown in the middle of the right side of FIG. 8, the diagonal member 24 and the connecting member 23 combined with the cross member 22 are fixed to the upper surface of the diagonal member 24, and the inner wall surface of the shaft shaft above the vertical shaft. By joining the receiving material of the connecting portion 21 and the connecting material 23 provided in advance at the two locations, the shaft is fixed to the inner wall surface of the shaft shaft, and is installed at four locations on a rectangular diagonal. In this installation form, the diagonal member 24 acts as a compression member on the column load. In addition, as shown in FIG. 13, the diagonal member 24 may be arranged in a form that acts as a tensile member. In this case, the diagonal member 24 is connected to the connecting portion 21 on the inner wall surface of the vertical shaft above the shaft as a pulling material obliquely outward from the cross member 22 disposed on the upper surface of the shaft. In terms of composition, a concrete material having a load resistance against compression is suitable for the diagonal member 24 shown in FIG. 8, and a steel member that is easily buckled and has a load resistance against tension is suitable for the diagonal member 24 shown in FIG. The connecting member 23 is installed while finely adjusting the separation between the shaft inner wall surface and the column member.

  FIG. 15 is a diagram showing this installation procedure in three steps (in the bottom view, a receiving material having a receiving portion is anchored to the inner wall surface in advance at the connecting portion 21 of the shaft inner wall surface, Enlarged view of joining.) First, in step a, the anchor bar protruding to the connection portion 21 side of the connection material 23 is inserted into the receiving material of the cross section of the approximate box, and the two-direction connection material 23 is welded to the cross member 22 side, respectively. The material side is temporarily fixed with a temporary bolt while being temporarily received at the receiving portion. Next, in step b, the positions of the four pillar members 5 are adjusted while loosening the temporary bolts in the connecting members 23 in the two directions perpendicular to the pillar members 5 so that the planar positions of the cores of the pillar members 5 match the design positions. While fixing, the horizontal member 6 and the cross member 22 are joined together by welding or the like. In this case, since each connecting member 23 is temporarily fixed with a temporary bolt while being temporarily received by the receiving portion, even if the sling is removed from the hanging hook of the crane, it will no longer fall off. Finally, in step c, the non-shrinkable mortar is filled in the receiving material of the cross section of the box that receives the insertion of the anchor bar of the connecting member 23, the anchor bar is fixed, and the planar position of the core of the column member 5 is permanently fixed. . At this time, a mold for preventing leakage of the mortar is assembled to the opening of the receiving portion.

  As described above, while re-fixing the connecting material 23 at the four corners, the cross members 22 are joined vertically and horizontally by the horizontal material 6, and finally fixed to the receiving material by the first layer. An eye-well structure is constructed (middle of the right side of FIG. 8).

  In addition, in order to increase the strength of a single well-shaped structure, a fire striking material may be further incorporated in the corner of the well-shaped structure, or a new pillar material may be incorporated in the middle of the four pillar materials. As described above, it is possible to construct a well-shaped structure from the middle part of the shaft shaft using the diagonal member 24, and the conventional method of assembling the formwork support from the bottom is unnecessary, and the tunnel is formed from the bottom of the shaft. It is possible to avoid the disruption of logistics to the mine. The effect of the diagonal member 24 is the same even when applied to a structure in which the precast member is assembled from the shaft bottom. As a result, in logistics, the initial excavation and the main excavation are made more efficient, and the shaft internal construction work can be performed in parallel with other works, thereby shortening the overall construction period.

FIG. 9 is a diagram showing a point in time when a shaft internal structure is built above the vertical surface of the shaft as Step 4.
The shaft internal structure is constructed above the vertical surface of the vertical shaft in the manner of stacking the well-shaped structure upward with the pillar material 5 in order from the first layer. As shown in the middle stage on the right side of FIG. 9, the connecting member provided on the inner wall surface of the shaft shaft by connecting the cross member 22 of the next layer to the column member 5 connected to the upper portion of the cross member 22 of the lower layer and connecting member 23. Temporarily fix to 21. After performing it in the four corners, the cross members 22 are joined to each other vertically and horizontally by the horizontal member 6, and the distance from the shaft inner wall is re-fixed at the connection portion 21 after final adjustment. Thereafter, the anchor bars on the connecting member 23 side are fixed in the connecting member 21 by filling and fixing the non-shrink mortar in the receiving member on the connecting portion side, thereby constructing a well-shaped structure of the next layer. This process will be repeated up to the ground. The cross member 22 divides each member in the six directions of horizontal front and rear, right and left, and vertical top and bottom, and is connected to the column member 5 at the time of erection, and the connection member 23 is finely adjusted to the inner peripheral surface of the shaft. However, the plane position is fixed and held accurately and efficiently while being connected.

  Here, if at least a crossing member and a horizontal member are integrated into a well shape horizontally in a ground yard in a large yard in advance in a ground yard, and are integrated in a form that fits into four already installed pillars. In addition, work efficiency is improved. In addition, when the connection material is also integrated horizontally with the well in the ground yard, when connecting, from the connection material side, the anchor bars integrated on the connection material side should not interfere with the receiving material of the cross section of the box. If it is separated and assembled after erection, there is no miscellaneous work. In these cases, the cross member 22 is connected to the horizontal member 6 and the connecting member 23 at the time of erection, and is temporarily fixed to the receiving member that is anchored in advance to the inner peripheral surface of the shaft while finely adjusting the separation. Then, the anchor bars separated after that are assembled so as to extend over the connecting member 23 and the receiving member, and the non-shrinkage mortar is filled and fixed therein, thereby fixing the plane position with high accuracy and efficiency.

FIG. 14 shows a procedure for fitting the cross member 22 and the column member 5 together. Protruding protrusions are provided at the lower end of the column member joint portion of the cross member 22, and concave hole portions are provided at the upper end portion, and the convex protrusion is provided at the lower end portion of the joint portion of the column member 5 with the cross member 22. A part (not shown) and a concave hole part are provided at the upper end, and both are fitted in the vertical direction. In addition, even if the cross members are integrally formed with the pillar material at the factory production stage, the weight of the member at the time of erection increases, but the same effect can be obtained while the fitting portion is halved. In these cases, the unevenness of the fitting may be reversed.
Moreover, the F cross-sectional plan view of FIG. 9 shows a well-shaped structure provided with a guide frame 7 and a guide 8 of a work lift to be installed thereafter.

FIG. 10 is a diagram showing a point in time at Step 5 when the construction of the shaft structure remaining in the shaft bottom is started after the shield machine starts excavating from the entrance and advances.
As shown in the G cross-sectional plan view of FIG. 10, when the shield machine moves forward and the bottom of the vertical shaft is vacant, a well-shaped structure is constructed from this bottom, and the well shape already established above the vertical surface of the vertical shaft It will be connected to the structure. About this part, even if it assembles | assembles from a bottom part to a collar part, it may assemble to a bottom part, hanging from a collar part.

  In addition, the column material 5 at this location has a structure of a hollow precast material, and after the initial excavation, the interior is filled with concrete having high load resistance against the axial compression force, and finally the diagonal material is removed and received. You may make it change. As a result, the completed system can have a structure capable of withstanding a larger equipment load.

FIG. 16 is a diagram showing a structure of a hollow precast column material. In order to fit the joints at both the upper and lower ends, the fitting material is radially fixed to the connection rings at both ends in order to fit. As a procedure at the time of joining, after fitting and adjusting the planar position and height to the designed position, the upper and lower connecting rings are welded and joined.
In FIG. 14, the fitting procedure between the cross member 22 and the pillar material 5 is shown. FIG. 17 shows the fitting procedure when the pillar material 5 is a hollow precast material. The fitting procedure using the fitting material and the connection ring is the same as in the case of FIG.

  Next, the process (step d-step i) which builds a well-shaped structure from the bottom of a shaft will be described with reference to FIGS. FIG. 18 shows step d to step f, and FIG. 19 shows step g to step i.

  First, in step d shown in FIG. 18, a reinforcing bar and a connection ring that are fixed to the lower floor are fixed in advance at the column position at the bottom of the shaft. In the subsequent step e shown in FIG. 18, the hollow precast column 5 is fitted to the connecting ring at the bottom of the shaft while adjusting the fitting height and temporarily welded. Subsequently, in step f, the connection rings 23 of the column member 5 and the horizontal members 6 and the cross members 22 are welded and fixed while adjusting the distance between the column member 5 and the inner wall surface of the shaft with the connection member 23 in two directions ( This procedure is the same as described with reference to FIG.

  In step g shown in FIG. 19, each member is fixed up to the stage where the rivets are joined in the procedure of steps d to f described above. Next, in step h, the vertical reinforcing bars on the outer surface of the connection ring are lap-connected, the hoop bars are arranged, the mold is assembled on the hollow portion and the outer surface portion of the connection ring, and high-fluidity concrete is placed. Finally, in step i, after the high-fluidity concrete is cured, the remaining post-joining column members 5 are joined up and down. Here, the pillar material 5 for final joining may be an RC structure in which the upper concrete is placed, or a metal structure. The former is excellent in axial yield strength, but the process is delayed. The latter has the opposite effect.

FIG. 11 is a diagram showing a point in time when the internal structure of the shaft is completed, the construction lift is installed, and the segment carriage 11 is lowered to the bottom of the shaft as step 6.
As described above, the well-shaped structure started to be constructed from the bottom of the shaft is connected to the well-shaped structure existing above the shaft upper surface of the shaft, and the internal structure of the entire shaft is completed. After installation, install the lift for construction. After that, the large crane in the ground yard is removed and the soundproof house is completed by complementing the missing part of the roof of the soundproof house.

  In addition, the underground tunnel side shifts from the initial excavation to the main excavation, rails are also laid in the tunnel, and the delivery of segment carts, etc. begins. At that time, as shown in the I sectional view of FIG. 11, the rail provided in the long side direction in the cage 1 is connected to the rail in the axial direction in the tunnel and the rail in the same direction of the ground yard. Configure. As a result, the segments can be transported seamlessly from the ground yard into the tunnel via the opening on the short side of the cage 1 while being loaded on the segment cart without the need for delivery.

Here, since the cage 1 does not need to be a dedicated transport device such as a segment cart, the tire vehicle and the worker can be transported when the cart is not loaded.
Furthermore, in FIG. 20, the process example of a shaft and shield construction based on Example 1 and Example 2 is shown with a line table. As shown in the figure, the process according to the present invention can significantly shorten the construction period after reaching the conventional process mainly by precasting and prior installation in the shaft internal construction work.

(3) Material Carriage Cart FIG. 12 is a plan view showing a state in which the segment car 11 lowered to the bottom of the shaft by the cage 1 is connected to the material transport car.
As described above, the configuration (layout) of the rail laid in the bottom of the shaft and the tunnel mine is devised so that the rail provided on the inner bottom surface of the cage 1 and the rail laid in the tunnel and the tunnel mine can be directly connected. To do. For example, as shown in FIG. 12, the segment cart 11 placed on the cage 1 can be directly connected to the material transport cart 9 and transported by configuring the bottom of the shaft and the rails in the tunnel shaft. Here, instead of the rail provided on the inner bottom surface of the cage 1, for example, a rail of an approximate beam is arranged on the inner wall surface or ceiling surface on both sides, and the segment cart 11 receives a guide via a roller. Can achieve the same effect (not shown). The former has a simple equipment configuration, while the rails on the floor obstruct the transportation of the tire vehicle, and the latter has the opposite characteristics.

  In order to construct a material transport management system in the tunnel mine, an IC tag reader 10 and a radio (not shown) are mounted on the material transport cart 9, and the IC tag 12 is attached to the material that is the load of the segment cart. At the same time, an IC tag indicating the position at a specific position or a specific distance of the transport location in the tunnel mine is separately installed (not shown). Then, the information read from these IC tags by the IC tag reader 10 is transmitted to a management computer (not shown) via the underground network by a wireless device. Thereby, the identification of the material and the location information of the material are recorded and managed in time series.

  The IC tag 12 adopts a passive type that transmits and receives information in a non-contact manner with energy from a reader / writer (however, it is not limited to this type, but is most efficient in consideration of operations such as maintenance) ), The IC tag 12 holds a code indicating material identification, location, and the like. Further, data read from the IC tag 12 by the IC tag reader 10 is stored as a database and used in the material transport management system.

DESCRIPTION OF SYMBOLS 1 Cage, 2 Counterweight, 3 Hoisting machine, 4 Machine room, 5 Column material, 6 Horizontal material, 7 Guide frame, 8 Guide, 9 Material conveyance cart, 10 IC tag reader, 11 Segment cart, 12 IC tag, 21 Connection part , 22 Cross member, 23 Connecting material, 24 Diagonal material

Claims (8)

A construction member for constructing the internal structure of a shield tunnel shaft,
A precast member having a well-shaped structure in plan view is a layer in the vertical direction of the construction member,
The precast member has a cross-section of the four points provided in a rectangular diagonal in the vicinity of the inner wall surface of the shafts on the same horizontal plane, a horizontal member which connects the intersection adjacent orthogonal in the same horizontal plane, the and the bar material or at least its upper or lower end for connecting the respective intersection portions in a vertical direction and crossing portions, respectively for engagement cormorants corresponds adjacent in the vertical direction is mated with the cross section, the said intersection It is composed of connecting members that individually connect each of the connecting portions provided on the inner wall surface, and the direction of the horizontal member in the long side direction of the well-shaped structure is generally matched with the axial direction of the shield tunnel ,
The construction member construction member of the vertical shaft internal structure which is a layered structure in which a plurality of laminated connecting the intersection adjacent to the precast member by Ri vertically on the pillar <br/>. A construction member for a shaft internal structure according to claim 1,
The deployed cross-member as intersections, building members of shafts internal structure which is a structure in which more connection to another cross member and the fitting adjacent to the vertical direction in a state integrated with the pillar. A construction member for a shaft internal structure according to claim 1,
Cross member which is deployed as the intersection in a state integrated with the horizontal member has a structure in which more connected to the column member and the fitting in the vertical direction up and down, at least the deployment to the four-point intersections The construction member of the shaft internal structure characterized by comprising rectangular shape. A construction member for a shaft internal structure according to claim 1,
The connecting member is a construction member for a shaft internal structure, wherein the distance between the column member and the inner wall surface can be adjusted. A construction member for a shaft internal structure according to claim 1,
The column member has a hollow structure that allows concrete to be filled inside itself, and is a construction member for a shaft internal structure. A construction member for a shaft internal structure according to claim 1,
It has an oblique member which supports the cross member and the pillar material by connecting to the cross member and the pillar material provided as the intersection from the inner wall or the flange portion protruding directly above the tunnel. Construction member of the shaft internal structure. A work lift installed on the construction member of the shaft internal structure according to claim 1,
A rectangular parallelepiped cage, a counterweight, a guide for guiding the cage and the counterweight to be raised and lowered, and a plurality of hoisting machines for raising and lowering,
The cage has an opening / closing port provided on at least one side surface on the short side of the cage and on the cross-sectional side of the tunnel, and the cage and the counterweight are supported by the pillar material,
The guide is attached to the inside of the intersection of the four points of the horizontal member ,
The work lift, wherein the plurality of hoisting machines are installed on a ground portion of the multi-layer structure . A material transport cart for transporting material transported by the construction lift according to claim 7,
An IC tag reader and a wireless device are mounted, and the IC tag attached to the material by the IC tag reader and information read from an IC tag provided at a specific location or a specific distance within a range in which the material is transported by the wireless device. A material transport cart that is transmitted to a management computer.

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