JP4504543B2 - Drilling method of parent-child shield and different diameter connecting segment for receiving reaction force - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a parent-child shield excavation method for starting a child shield from a parent shield, and a segment assembled by the parent-child shield.
[0002]
[Prior art]
As shown in FIG. 22, when starting the child shield 54 from the parent shield 53, the reaction force receiving member 50 for receiving the reaction force of the child shield 54 is received by the parent machine side segment 10 assembled in the pit 55 by the parent shield 53. The child shield 54 is started while taking a reaction force with the reaction force receiving member 50.
[0003]
As shown in FIG. 23 and FIG. 24, the reaction force receiving member 50 is a plate that protrudes inward and receives the rear end of the slave unit side segment 11, and the reaction force receiving member 50 is disposed on the back side of the reaction force receiving member 50. A large number of ribs 51 are provided to support 50 from behind. The reaction force receiving member 50 and the rib 51 are each firmly welded to the base unit side segment 10 to withstand a large force received from the child shield 54.
[0004]
[Problems to be solved by the invention]
By the way, since the reaction force receiving member 50 and a large number of ribs 51 are welded in the narrow pit 55, the workability is very poor, and an extra difficult process that requires the ribs 51 to be welded at a narrow interval. There is a problem that it becomes necessary.
[0005]
Moreover, since it is a field work with poor workability, it is difficult to ensure the surface accuracy of the surface 52 that receives the handset side segment 11, and there is a problem that the handset side segment 11 is closely attached and water cannot be stopped well.
[0006]
After the reaction force receiving member 50 is provided, the child shield must be started by a necessary space to secure a tail assembly space for the child shield. After assembling, there is a problem that a complicated process such as having to start again is required.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above problems and provide a parent-child shield digging method and a segment used in the digging method that can easily start a child shield without adding extra difficult steps.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to a reaction method for receiving a reaction force for connecting a parent machine side segment assembled by a parent shield and a child machine side segment in a method for digging a parent and child shield in which a child shield is started from a parent shield. An adapter for forming a diameter connection segment in advance and providing the child shield with a shield jack for taking a reaction force from the child device side segment in advance and applying the shield jack to the front end of the parent device side segment at the tip of the shield jack previously provided, the final end of the base-side segments assembled in the parent shield, assemble different diameter connecting segment for receiving the reaction force, special substantially the same shape as the base-side segments different diameter connecting segment for receiving reaction force After assembling the segment and fixing the special segment to the parent tail frame of the parent shield, · The is degenerated, remove the adapter from the distal end of the shield jacks, assembled said child machine side segments different diameter connecting segment for receiving the reaction force, in the child machine side segment, starting a Nagarako shield takes the reaction force It is something to be made .
[0009]
Also, after loading the reaction force receiving different-diameter connection segment into the Electa and connecting the reaction force receiving different-diameter connection segment to the final end of the parent machine side segment, the different-diameter connection segment ring is assembled. In the shield frame of the shield, it is preferable to assemble the child device side segment to the vicinity of the jack of the child shield, start the child shield while taking reaction force with the assembled child device side segment, and sequentially assemble the child device side segments.
[0010]
Still further, after loading the reaction force receiving different diameter connection segment into the erector, connecting the reaction force receiving different diameter connection segment to the final end of the base unit side segment and assembling the different diameter connection segment ring, In order to secure the space for assembling the child shield in front of the different diameter connection segment ring, after further digging the parent shield and assembling the child shield, assemble the child device side segment near the jack of the child shield, and the assembled child device It is good to start the child shield while taking the reaction force in the side segment.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0015]
As shown in FIGS. 1 and 15, the parent-child shield 1 includes a large-diameter parent shield 2 and a child shield 3 that is concentrically provided in the parent shield 2 and is separable and slightly smaller in diameter than the parent shield 2. Consists of.
[0016]
The parent shield 2 is formed in a thick and substantially cylindrical shape.
[0017]
The child shield 3 is composed of a front cylinder 4 and a rear cylinder 5 provided at the rear end of the front cylinder 4 so as to be bendable. When digging together with the parent and child, only the front cylinder 4 and a part of the rear cylinder 5 are provided. Is arranged in the parent shield 2.
[0018]
The child shield 3 is provided on the front barrel 4 so as to be rotatable and is positioned at the front end in the excavation direction, and the excavation soil (not shown) in the cutter chamber 7 formed on the rear side of the cutter 6 is taken into the pit 8. A screw conveyor 9 for sending backward, an erector 12 for assembling the parent machine side segment 10 or the child machine side segment 11, and a shield jack 13 for taking a reaction force from the parent machine side segment 10 or the child machine side segment 11 And have.
[0019]
The cutter 6 has a spoke expansion / contraction jack (not shown) for expanding / contracting the cutter pork 14 in the radial direction. When the cutter 6 is dug together with the parent and child, the cutter pork 14 is extended to reduce the outer diameter of the cutter 6. In addition to matching with the size of the parent shield 2, when digging with only the child shield 3, the cutter pork 14 is contracted so that the outer diameter of the cutter 6 matches the size of the child shield 3.
[0020]
The screw conveyor 9 is provided so as to incline so that the front end is opened at the lower part of the cutter chamber 7 and the rear end side is raised. A screw gate 15 is provided at the rear end of the screw conveyor 9 to close the earth and sand transport passage so as to be freely opened and closed.
[0021]
The erector 12 grips the swivel ring 16 provided on the front body 4 of the child shield 3 via a frame material (not shown) and the like, and the parent machine side segment 10 or the child machine side segment 11 provided on the swivel ring 16. And an assembly arm 17 for moving to a predetermined assembly position.
[0022]
The assembly arm 17 is formed to be extendable and contractible, and not only the parent device side segment 10 but also the child device side segment 11 can be assembled by changing the amount of expansion and contraction.
[0023]
The shield jack 13 is provided integrally with the rear trunk 5 of the child shield 3, and when digging into the parent and child integrally, an adapter 18 is provided at the front end to contact the front end of the base unit side segment 10. A guide 20 provided on the parent shield frame 19 of the parent shield 2 is guided so as to extend and contract in the longitudinal direction of the parent-child shield 1.
[0024]
In addition, a plurality of reaction force receiving knock pins 21 for axially fixing each other between the parent shield 2 and the child shield 3 are inserted and fixed in the radial direction, and the force received from the front surface of the cutter 6 is received as a single body. It is like that.
[0025]
When starting the child shield 3 from the parent shield 2, the reaction force is received at the final end of the parent machine side segment 10 assembled by the parent shield 2 at a factory (not shown) with processing facilities. Assemble the different-diameter connection segments 22a, 22b, and 22c.
[0026]
As shown in FIGS. 1 and 3, the reaction force receiving different-diameter connection segments 22 a, 22 b, and 22 c are used to connect the parent device side segment 10 and the child device side segment 11 assembled by the parent shield 2. The normal type segment 22a whose both end faces in the circumferential direction extend in the radial direction, the key type segment 22b formed in a C shape so that both end faces in the circumferential direction face the outer peripheral side, the normal type segment 22a and the key type The connection type segment 22c that is positioned between the segments 22b and connects the two is assembled in a ring shape (hereinafter, a segment assembled in a ring shape is referred to as a segment ring).
[0027]
As shown in FIG. 2, each type of reaction force receiving different-diameter connection segments 22a, 22b, and 22c has a rear-end end face outer peripheral portion 38 coupled to a final-end base unit-side segment ring 23, and a front-end end face. The inner peripheral portion 39 is formed so as to be connected to the handset side segment ring 26 to be constructed.
[0028]
More specifically, as shown in FIGS. 1 and 4 to 14, the reaction force receiving different-diameter connection segments 22 a, 22 b, and 22 c are each formed to have the same curvature as that of the parent machine side segment ring 23. Parent side end face plates 25a, 25b, 25c connected to the base unit side segment ring 23 are provided on the inner periphery of the rear end of the arc-shaped steel plates 24a, 24b, 24c, and the inner peripheral ends of the arc-shaped steel plates 24a, 24b, 24c are provided. Are provided with child side end face plates 27a, 27b, 27c connected to the handset side segment ring 26, the end face plates 25, 27 are connected by a plurality of tapered ribs 28a, 28b, 28c, and arc-shaped steel. Connection end plates 29 and 30 for connecting the reaction force receiving different diameter connection segments 22 to each other are provided at both ends in the circumferential direction of the flanges 24a, 24b and 24c.
[0029]
The master side end face plates 25a, 25b, 25c are formed so that the inner peripheral side end and the outer peripheral side end are aligned with the main unit side segment 10, and are connected to the main unit side segment 10 without unevenness. ing.
[0030]
The child-side end plates 27a, 27b, 27c are formed with the outer peripheral end having the same curvature as the parent-side end plate 25a, 25b, 25c, and the inner peripheral end is located on the inner peripheral side of the slave unit side segment 11. It is formed so as to match the end, and is formed so as to extend radially inward from the parent side end face plates 25a, 25b, 25c.
[0031]
Further, on the child side end face plates 27a, 27b, 27c, an outer peripheral side bolt hole 43 for bolting a special segment 34 having substantially the same shape as the parent machine side segment 10 and a bolt on the child machine side segment 11 are bolted. The inner periphery side bolt hole 44 is formed.
[0032]
The outer peripheral side bolt holes 43 are formed on the outer peripheral side of the child side end face plates 27a, 27b, 27c so as to have a substantially equal pitch in the circumferential direction.
[0033]
The inner peripheral side bolt holes 44 are formed on the inner peripheral side of the child end face plates 27a, 27b, and 27c so as to be shifted from the outer peripheral side bolt holes 43 in the circumferential direction so as to avoid the flange portion 42 so as to have a substantially equal pitch. ing. As a result, the inner peripheral side bolt hole 44 can be formed at a position shifted in the circumferential direction from the flange part 42, and can be easily bolted without being hidden on the back side (outer peripheral side) of the flange part 42. ing.
[0034]
As shown in FIG. 2, the ribs 28a, 28b and 28c are subjected to an eccentric load corresponding to the eccentric amount e of the outer diameter difference between the parent machine side segment ring 23 and the child machine side segment ring 26. However, the plate thickness and shape are determined so that the proof stress is within the allowable stress. Specifically, each of the ribs 28a, 28b, and 28c has a flange 42 formed by bending the radially inner end in the circumferential direction, and is formed in an L-shaped cross section.
[0035]
Also, each type of reaction force receiving different-diameter connection segments 22a, 22b, and 22c has a grout socket 31 for injecting a backfill material and a suspension for hanging with a hoist (not shown). A metal fitting 32 is provided.
[0036]
The segments 10, 11, 22 a, 22 b, 22 c are connected to each other by bolting the end face plates together.
[0037]
Since the reaction force receiving different-diameter connection segment 22 is manufactured in a factory equipped with processing equipment, a product with sufficient processing accuracy can be easily manufactured.
[0038]
Assembling of the reaction force receiving different-diameter connection segment 22 is performed using the erector 12 in the same manner as the normal base unit side segment 10. Therefore, there is no need to weld a member (not shown) for receiving the reaction force on the base unit side segment 10 in the narrow pit 8, and a difficult and time-consuming process can be omitted.
[0039]
As shown in FIG. 15, when the different diameter connecting segment ring 33 is assembled, in order to secure a space for assembling the child shield 3 in the parent shield 2, the parent shield frame of the parent shield 2 is further advanced while the parent shield 2 is further digged. 19, a special segment 34 having substantially the same shape as the base unit side segment 10 is assembled.
[0040]
Then, as shown in FIG. 16, after the special segment 34 is welded and fixed to the parent tail frame 35 of the parent shield 2, the shield jack 13 is retracted and the adapter 18 is removed from the tip of the shield jack 13. Thereby, a sufficient working space for assembling the child shield 3 in the parent tail frame 35 can be secured.
[0041]
Thereafter, in order to further facilitate the work, the screw gate 15 protruding into the parent tail frame 35 is removed, and an opening (not shown) after the screw gate 15 is removed as shown in FIG. ) To install the blind lid 36.
[0042]
As shown in FIG. 2, a water stop seal 40 made of a backfill material is provided on the inner peripheral side of the special segment 34.
[0043]
As shown in FIGS. 16 and 17, the child tail frame 37 of the child shield 3 is transported to the underground 8 and assembled to the child shield 3 using the erector 12 or a chain block (not shown), as shown in FIG. Then, the handset side segment 11 is assembled to the vicinity of the shield jack 13.
[0044]
At this time, since the inner peripheral side bolt hole 44 is formed so as to be shifted in the circumferential direction from the flange portion 42, it is not hidden behind the flange portion 42 and can be easily bolted.
[0045]
Then, the blind cover 36 is removed and the screw gate 15 is reattached, and a backfilling material is injected from a grout hole (not shown) provided in the child tail frame 37 and the child device side segment 11 of the child shield 3 to provide the parent shield. 2 and the child shield 3 are filled, and the shield jack 13 is extended to transfer the front thrust from the parent shield frame 19 of the parent shield 2 to the child device side segment 11.
[0046]
As shown in FIG. 19, the cutter pork 14 is retracted so that the outer diameter of the cutter 6 matches the child shield 3, and the reaction force receiving knock pin 21 is pulled out. The child shield 3 is completely separated from the parent shield 2 and is ready to start.
[0047]
Thereafter, as shown in FIG. 20, the slave unit side segments 11 are sequentially assembled while starting the slave shield 3 while taking a reaction force with the assembled slave unit side segments 11.
[0048]
The driving force is obtained by extending the shield jack 13.
[0049]
When the shield jack 13 is extended, the force is transmitted to the reaction force receiving different-diameter connection segments 22a, 22b, and 22c via the slave unit-side segment 11, and further to the reaction force receiving different-diameter connection segments 22a, 22b, and 22c. It is transmitted to the base unit side segment 10 assembled rearward. Since the parent machine side segment 10 does not move, the child shield 3 is promoted.
[0050]
In this way, reaction force receiving different-diameter connection segments 22a, 22b, and 22c for connecting the parent device side segment 10 and the child device side segment 11 assembled by the parent shield 2 are formed in advance. The reaction force receiving different diameter connection segments 22a, 22b, and 22c are assembled at the final end of the assembled base unit side segment 10, and the reaction force receiving different diameter connection segments 22a, 22b, and 22c are used to remove the reaction force. However, since the child shield 3 is started, it is possible to eliminate the difficult and highly accurate welding work that has been performed in the narrow and poor workability 8 and to shorten the construction period and cost. The surface accuracy of the connection surface with the handset side segment 11 can be easily secured and water can be stopped well.
[0051]
Further, after the reaction force receiving different diameter connection segments 22a, 22b, and 22c are connected to the final end of the base unit side segment 10 by the erector 12, the different diameter connection segment ring 33 is assembled, and then the parent shield frame of the parent shield 2 is assembled. 19, the child machine side segment 11 is assembled to the vicinity of the jack 13 of the child shield 3, the child shield 3 is started while taking reaction force with the assembled child machine side segment 11, and the child machine side segment 11 is sequentially assembled. Therefore, the child shield 3 can be easily started from the parent shield 2.
[0052]
Further, after the reaction force receiving different diameter connection segments 22a, 22b, and 22c are connected to the final end of the base unit side segment 10 by the erector 12, the different diameter connection segment ring 33 is assembled. In order to secure the space for assembling the child shield ahead, the parent shield 2 is further advanced by 2 to 3 rings of the parent device side segment 10, and after the child shield 3 is assembled, the child shield 3 is close to the jack 13 of the child shield 3 side. Since the segment 11 is assembled and the child shield 3 is started while taking reaction force with the assembled slave unit side segment 11, the assembly space of the child shield 2 can be easily secured, and the child shield 2 can be quickly and easily Can be started.
[0053]
The rear end end surface outer peripheral portion 38 is connected to the final end master unit side segment ring 23, and the front end end surface inner peripheral portion 39 is connected to the slave unit side segment ring 26 to be constructed. Since the connection segments 22a, 22b, and 22c are formed, a structure for receiving the slave unit side segment 11 is easily provided in the pit 8 simply by assembling the pit 8 using the erector 12 similarly to the normal base unit side segment 10. be able to.
[0054]
Further, master side end plates 25a, 25b, and 25c connected to the base unit side segment ring 23 are provided on the inner periphery of the rear end of the arc-shaped steel bars 24a, 24b, and 24c formed to have the same curvature as the base unit side segment ring 23. Are provided on the inner peripheral ends of the arcuate steel plates 24a, 24b, and 24c, and are provided with child end face plates 27a, 27b, and 27c that are connected to the handset side segment ring 26, and between the end face plates 25 and 27 are tapered. Connected by ribs 28a, 28b and 28c, and further provided with connection end plates 29 and 30 at both ends in the circumferential direction of the arc-shaped steel plates 24a, 24b and 24c, the reaction force receiving different diameter connection segments 22a, 22b and 22c are provided. Because of this configuration, the reaction force receiving different-diameter connection segments 22a, 22b, and 22c can be easily controlled by the erector 12, and the pit 8 can be easily operated in the same manner as the normal base unit side segment 10. It can be assembled.
[0055]
The ribs 28a, 28b, and 28c have flange portions 42 formed by bending the radially inner side in the circumferential direction, and the child-side end face plates 27a, 27b, and 27c have special diameters that are the same as those of the parent machine-side segment 10. The outer peripheral side bolt holes 43 for bolting the segments 34 are formed at substantially equal pitches in the circumferential direction, and the inner peripheral side bolt holes 44 for bolting the handset side segment 11 are In order to avoid this, the outer circumferential side bolt holes 43 are shifted in the circumferential direction so as to be formed at substantially the same pitch, so that the reaction force receiving different-diameter connection segments 22a, 22b, 22c are formed with sufficient strength, Working space can be secured, and the special segment 34 and the handset side segment 11 can be easily coupled to the reaction force receiving different diameter connection segments 22a, 22b, 22c.
[0056]
In the embodiment, the reaction force receiving different-diameter connection segment 22 having a tapered side view is described. However, the present invention is not limited to this. For example, as shown in FIG. The receiving different diameter connecting segment 41 may be used.
[0057]
【The invention's effect】
In short, according to the present invention, the following excellent effects can be obtained.
[0058]
(1) The child shield can be started easily without adding extra difficult steps.
[0059]
(2) Water can be satisfactorily stopped between the handset side segment and the base unit side segment.
[Brief description of the drawings]
FIG. 1 is a side view of a parent-child shield and a segment showing a preferred embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a plan view of a child shield starting segment.
FIG. 5 is a view taken along the line VV in FIG. 4;
6 is a view taken along the line VI-VI in FIG. 4;
7 is a view taken along line VII-VII in FIG.
8 is a cross-sectional view taken along line VIII-VIII in FIG.
FIG. 9 is a plan view of a child shield starting segment.
10 is a view taken along the line X-X in FIG. 9;
11 is a view taken along the line XI-XI in FIG. 9;
FIG. 12 is a plan view of a child shield starting segment.
13 is a view taken along the line XIII-XIII in FIG.
14 is a view taken along the line XIV-XIV in FIG. 12;
FIG. 15 is a side view of the parent-child shield in preparation for child shield start-up.
FIG. 16 is a side view of the parent-child shield in preparation for child shield start-up.
FIG. 17 is a side view of the parent-child shield in preparation for child shield start-up.
FIG. 18 is a side view of the parent-child shield in preparation for child shield start-up.
FIG. 19 is a side view of the parent-child shield in preparation for child shield start-up.
FIG. 20 is a side view of the parent-child shield during child shield start-up.
FIG. 21 is a side view of a parent-child shield and segments showing another embodiment.
FIG. 22 is a schematic explanatory diagram of a conventional method.
23 is an enlarged view of a main part of FIG.
24 is a perspective view of FIG. 23. FIG.
[Explanation of symbols]
1 parent-child shield 2 parent shield 3 child shield 10 parent machine side segment 11 child machine side segment 12 erector 13 shield jack (jack)
19 Parent shield frame 22a Reaction force receiving different-diameter connection segment 22b Reaction force receiving different-diameter connection segment 22c Reaction force receiving different-diameter connection segment 23 Master unit side segment ring 24a Arc-shaped steel rod 24b Arc-shaped steel rod 24c Arc-shaped Steel plate 25a Parent side end face plate 25b Parent side end face plate 25c Parent side end face plate 26 Slave unit side segment ring 27a Child side end face plate 27b Child side end face plate 27c Child side end face plate 28a Rib 28b Rib 28c Rib 29 Connecting end face plate 30 End face plate for connection 33 Different diameter connection segment ring 38 End face outer peripheral part 39 End face inner peripheral part 42 Gutter part 42
43 Outer peripheral side bolt hole 44 Inner peripheral side bolt hole

Claims (3)

In the method of digging a parent-child shield in which the child shield is started from the parent shield, a reaction force receiving different-diameter connection segment for connecting the parent machine-side segment assembled with the parent shield and the child machine-side segment is formed in advance, and the child shield is formed. The base unit is provided with a shield jack for taking a reaction force from the slave unit side segment in advance, and an adapter is provided in advance at the front end of the base unit side segment at the tip of the shield jack, and is assembled with the master shield the final end of the side segments, assembled different diameter connecting segment for receiving the reaction force, assembling of special segments of substantially the same shape as the base-side segments different diameter connecting segment for receiving reaction force, the parent shield the special segment After welding and fixing to the parent tail frame, the shield jack is degenerated and the shield jack is Remove the adapter from the distal end, assembled said child machine side segments different diameter connecting segment for receiving the reaction force, in the child machine side segment, the parent shield, characterized in that to start the Nagarako shield takes the reaction force How to dig.   After loading the reaction force receiving different-diameter connection segment into the Electa and connecting the reaction force receiving different-diameter connection segment to the final end of the base unit side segment, The slave unit side segment is assembled within the shield frame to the vicinity of the jack of the slave shield, the slave shield is started while taking the reaction force with the assembled slave unit side segment, and the slave unit side segment is sequentially assembled. How to dig up a parent-child shield.   After loading the reaction force receiving different-diameter connection segment into the Electa and connecting the reaction force receiving different-diameter connection segment to the final end of the base unit side segment, In order to secure the space for assembling the child shield in front of the segment ring, after further digging the parent shield and assembling the child shield, assemble the child device side segment near the jack of the child shield, and with the assembled child device side segment The method for digging a parent-child shield according to claim 1 or 2, wherein the child shield is started while taking a reaction force.

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