JPH06167196A - Shield method secondary construction flexible segment - Google Patents

Abstract

PURPOSE:To make it possible to ensure effective thrust transfer function and cut-off function even in the case of driving construction within the same shape size as that of a general segment and in the case of subsequent secondary lining construction by using a rigid body combined with a specific expansion body. CONSTITUTION:Second side-ring bodies 35 having the practically same width as thickness of a secondary construction general segment 30 mounted to the inside of a primary construction segment 20 are connected to first side-ring bodies 5 with connection boards 36. After that, a secondary construction segment 44 connecting a plurality of second plate-like connection ring members 37 to a plurality of second flexible members 40 forming bendable sections 41 in the middle section are formed between the second side-ring bodies 35. At that time, projection threads 38 receiving and bearing the ends of the second flexible members 40 are formed in the middle section of the second plate-like connection members 37, and the ends of the second flexible members 40 are set opposed to the projection threads 38 and second plate-like connection ring members 37 and are anchored with bolts 43 through holding plates 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the idea of a flexible segment for secondary construction of a shield construction method, which is effective in immediately responding to earthquake resistance or uneven settlement in the secondary construction segment of the shield construction method, and expands and contracts with water resistance. It is intended to provide a mechanism that fully exerts the above-mentioned properties, is easy to handle in construction, suppresses stress generation, and has excellent durability.

[0002]

2. Description of the Related Art The shield method occupies an important position in civil engineering work, and providing flexibility in that segment avoids damage to the shield segment itself during uneven subsidence on soft ground or during earthquakes, and the safety thereof. It is indispensable for ensuring the reliability, and various studies have been made in the past. That is, such a flexible segment is set in a shield machine shell by being pushed by a general segment together with a general segment, and then a load bearing member or a seal material is attached to the inner surface of the flexible segment and the general segment to set the general segment. It is common to form secondary lining concrete on the inner surface of the segment.

That is, the construction state of an example of such a flexible segment is as shown in FIG. 9, and a frame portion body which also serves as a secondary lining in 20 rows of general segments which is a standard portion body. The primary construction member 30 composed of 21, 21 and the thrust receiving members 22, 22 is attached to the shield machine shell 3 by an erector or the like.
The thrust excavation work is carried out by assembling it in 1 and applying the thrust by the shield machine to the general segment 20 and the primary construction body 30.

After the thrust transmission by the propulsion construction performed as described above is completed, the thrust receiving portion 22 is removed and the flexible secondary water stop material 24 is attached as shown in FIG. Attached and cover cloth 25, load bearing member 26
Then, the bearing sleeve 27 is attached, and the anchor material 28, the inner skin plate 29, and the inner cover 29a are further provided as shown in FIG.
3 is to be formed.

In civil engineering works by such propulsion construction, it is becoming more and more popular to make multiple constructions as a result of the enormous size of the constructions in recent years, that is, the primary constructions formed as described above. It is carried out to form a multi-layered segment by the secondary construction on the inner surface or by the third construction on the inner surface.

[0006]

However, the conventional structure as described above has a complicated structure and handling, and the man-hours at the site are extremely large. That is, the state of FIG. 9 and the state of FIG.
In the state of 1, the frame body 21 remains only between the general segments 20, and other structural members or structural relations are completely different. Since each segment or member is sequentially removed and assembled in the circumference, the number of steps is inevitably large.

Further, since the frame portion body which is considerably thicker than the general segment 20 is adopted at the time of the primary construction, the handling at the time of assembling becomes remarkably different from the standard general segment, and it becomes complicated. Further, as shown in FIG. 9 and FIG. 10, the main members such as the thrust receiving portion that were assembled and connected at the time of propulsion construction were removed to be completely separated, and separate members were newly installed therein. Therefore, it is difficult to properly obtain water-stopping property and stress distribution because the watertight connection that was formed at the time of propulsion construction is released by handling them and it is formed as a newly incorporated state.

Further, regarding the recent secondary construction relating to such segment construction, it is preferable that the plurality of segments have appropriate flexibility and are effectively linked together. No suitable method has been found, which makes it difficult to effectively carry out multi-angled construction.

[0009]

The present invention has been studied to solve the problems in the prior art as described above, and has the same structure as a general segment by using a rigid part integrated with a specific elastic part. It is possible to obtain a segment with favorable flexibility while ensuring an effective thrust transmission function and water blocking function during propulsion construction and subsequent secondary lining construction within the shape and size range. The present invention is also designed to be appropriately implemented, and is as follows.

(1) A first side ring portion having a thickness substantially the same as that of a primary construction general segment propelled and set in an excavation hole by receiving thrust from a propulsion and excavation mechanism is provided oppositely,
In the skin plate provided on the outer peripheral side between the first side ring parts, a chevron bend is formed in the middle toward the outer circumferential direction, and joint end face portions parallel to both sides of the chevron bend are folded back into a uniform thickness. The first connecting ring member is formed by sandwiching the end plate of the first connecting ring member and the holding plate in a pair.
The thickness of the primary construction segment that constitutes a flexible portion in which a plurality of flexible members are alternately incorporated and connected to the first coupling ring member, and the secondary construction general segment provided inside the above-mentioned primary construction general segment A second side ring part body having substantially the same width as that of the first side ring part body, and the second side ring part body is connected to and opposed to the first side ring part body.
A flexible segment for secondary construction of a shield construction method, comprising: a connecting ring member and a secondary construction segment in which a plurality of second flexible members each having a flexible portion formed in the middle are coupled.

(2) A ridge for receiving and supporting the end of the second flexible member is formed in the middle of the plate-like second connecting ring member,
For the secondary construction of the shield construction method according to the item (1), characterized in that the end of the second flexible member is set on the ridge and the plate-shaped second connecting ring member, and is fixed through the holding plate. Flexible segment.

[0012]

[Operation] By arranging the first side ring body having substantially the same thickness as the primary construction general segment which is propelled and set in the excavation hole by receiving the thrust of the propulsion and excavation mechanism, these first side rings are arranged. The flexible portion body is incorporated through the portion body, and the entire flexible portion body incorporated through the side ring portion body is handled in the same manner as a general segment, and swaging propulsion is performed.

In the skin plate provided on the outer peripheral side of each of the above-mentioned first side ring parts, a chevron bend is formed in the middle toward the outer circumferential direction, and joint end face portions parallel to both sides of the chevron bend are equal in thickness. Since the flexible portion formed by folding back in a shape is provided, the joint end face portion is sandwiched and provided by the end plate of the connecting ring member and the pressing plate.

As described above, by forming a flexible portion in which a plurality of the first flexible members having both ends attached with the end plate of the connecting ring member and the holding plate sandwiched therebetween are alternately incorporated and connected with the connecting ring member. The skin plate forms a wide balanced setting relationship of the joint end faces under the condition that the invasion of external earth and sand is prevented, and the flexible member and the first connecting ring member are stable under such a biased action force condition. The flexible members are connected to each other and elastically propelled.

As described above, the thrust receiving member can be appropriately disposed inside the flexible portion formed by the combination of the first flexible member and the connecting ring member, whereby the same thickness range as the general segment can be provided. In the same manner as in the general segment, the transmission of propulsive force can be obtained.

The first member made of rubber or the like as described above
Since the end plate and the pressing plate are attached by sandwiching them on both sides of the flexible member, the flexible part has the same characteristics as a rigid body on both sides of them, firmly and stably connecting with the connecting ring part body, and sufficient flexibility. (EN) Provided is a primary construction flexible segment which enables a bending action and has a high durability by peeling off the both side portions.

Since the thrust receiving member disposed inside the flexible portion is detachably attached to the first side ring body, the thrust receiving member is disengaged after the propulsion work, and the flexible portion remains. By incorporating a secondary lining frame up to this point, in this case, the flexible portion is maintained while being propulsion-worked, so that a stable setting relationship is maintained, and the joint end surface of the first flexible member is the end plate and the holding plate. In addition to being sandwiched by the two, it is possible to form an accurate sealing relationship with less biased stress generation, etc., and to maintain the sealing relationship in the primary construction segment for a long period of time, and a mechanism having excellent durability. To form.

A second side ring portion body having a width substantially the same as the thickness of the secondary construction general segment provided inside the above-mentioned primary construction general segment is connected to the first side ring portion body to form a pair. 1 to form a secondary construction segment by connecting a plurality of plate-like second connecting ring members and a plurality of second flexible members having a bendable portion in the middle between the second side ring members. The secondary segment formed on the inner surface of the next segment also has suitable flexibility and favorable connectivity between the primary segment.

A ridge for receiving and supporting the end of the second flexible member is formed in the middle of the plate-like second connecting ring member, and the ridge and the plate-like second connecting ring member are provided with the second flexible member. By setting the end portion and fixing it through the holding plate, the second flexible member is stably and accurately assembled to the plate-like second connecting ring member to form a flexible segment, and the primary construction segment And a space suitable for arranging the members are formed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of the present invention as described above will be described with reference to the accompanying drawings.
The flexible segment of the present invention at the time of primary construction, which is assembled between the next construction general segments 20 and 20 for propulsion construction, is as shown in FIG. 1 and has the same width as the primary construction general segment 20. The skin plate 7 is attached to the outer surface side of the first side rings 5, 5,
The height (i.e., the thickness of the segment) is set to match the primary construction general segment 20.

In the assembly of the skin plate 7 as described above, as shown in FIG. 2, the first flexible member 1 and the first flexible member 1 in which the joining end faces 11 having a uniform thickness are formed at both ends of the flexible member 1 made of rubber. The plurality of ring members 3 are alternately assembled and positioned on the outer surface of the flexible portion 4 connected by the connector 6, and the first connecting ring member 3 is separately attached to the end plate 3 as shown in FIG.
a, 3a, the outer surface plate 3b, and the receiving plate 31 attached to the inner diameter side of the end plate 3a.

The above-mentioned first flexible member 1 has a cross-sectional structure which has an important characteristic in the construction of the present invention, has a suitable thickness in which the central portion is bent and formed in a mountain shape, and has a width direction. Although it has elasticity, the joint end faces 11 with the end plates 3a at both ends of the first flexible member 1 are formed so as to have a uniform thickness by folding back from the angled bent portion, and are parallel to each other. The joining end faces 11 and 11 are provided opposite to each other, and the end plate 3a and the pressing plate 2 firmly fasten the connecting ring member 3 to the connecting ring member 3.

It is preferable that the first flexible member 1 has a proper thickness as a whole to obtain preferable thrust transmission in the flexible portion 4 using the first flexible member 1 as shown in FIG. This is the reason for tightening, and a preferable design condition is that the intermediate bent portion has a considerable thickness with respect to the width (height in the drawing) of the end plate 3a. Is likewise selected from the range of 40 to 65% with respect to the width of the end plate 3a. Therefore, even when a propulsive force is applied, a preferable elastic propulsion action can be obtained in the first flexible member 1 made of rubber. .

The height of the first flexible member 1 and the first connecting ring member 3 in the inner and outer directions is 50 to 70%, preferably about 60% of the height of the side rings 5 and 5 described above. Therefore, the thrust receiving member 9 is attached to the inner surfaces of the side rings 5 and 5 having these members 1 and 3 attached to the skin plate 7 side, and the side rings 5 and 5 and the thrust receiving bolt 8 are attached.
Is provided to ensure the transmission of propulsive force by the pusher of the excavator.

The flexible portion 4 as described above is generally manufactured in a factory and assembled, and the form at the time of shipment is as shown by a partial cutaway in FIG. 2, and the side ring 5 is also included. The width and the thickness are the same as those of the general segment 20. For example, the width is 900 mm and the thickness is 250 mm. This is accurately achieved by the rigid transmission of the thrust receiving bar 8 and the thrust receiving bolt 7 and the elastic transmission of the flexible portion 4 which does not generate a biased acting force.

The molding dimension (that is, the dimension in the natural state) of the first flexible member 1 molded of rubber or the like is as shown by the solid line in FIG. 4, and this is always a compressive force without exerting a tensile force. It is set to receive. That is, in FIG. 4, the state of 1a indicated by the phantom line shows the state of the regular assembly dimension set by compression as described above, and the state of 1b also indicated by the imaginary line is the state at the time of absorbing shrinkage. ,
Furthermore, the state of 1c is during absorption of elongation, but even at the time of absorption of elongation, it is still in a compressed state smaller than the molding dimension, and it is possible to prevent the tensile force from acting substantially and It is possible to prevent breakage and peeling of the joint end faces 11, 11.

When the influence of the thrust on the segment is eliminated after the primary construction as shown in FIG.
If the thrust receiving bolt 8 as shown in Fig. 4 is loosened and the thrust receiving member 9 on the inner surface side is removed, a recess is formed on the inner surface between the side rings 5 and 5, and the skin plate 7 is of course formed on the outer surface. The flexible portion 4 remains in the majority region in the thickness of the side rings 5 and 5 in a state where the flexible portion 4 is still being propelled.

That is, the thrust receiving bolt 8 can be removed as described above, and the secondary lining frame 12 can be attached to the inside of the side ring 5 as shown in FIG. The frame bodies 12, 12 are connected by a connecting material 12a such as a wire rope, the seal rings 14 are attached to the frame bodies 12, 12, respectively, and a secondary water blocking band 15 as shown in FIGS. 6 and 7 is attached. be able to.

The secondary water blocking band 15 has seal portions 16 at both ends.
A seal member 16 having a is formed with an attachment piece 17 in which an L-shaped reinforcing portion is formed on the outer surface of the seal member 16 along the axial direction. The attachment plates 18 and 19 are also curved along the circumferential direction on the inner surface. The mounting plates 18 and 19 are provided with locking claws 18a and 19a which are engaged with each other at their respective ends, and the sealing members are provided by the restoring elasticity of the mounting plates 18 and 19. 16 is pressed against the seal ring 14, and the attachment plate 19 provides a good seal to the seal portion 16a.

In the present invention, the above-mentioned secondary lining frame 1 is also used.
A second side ring part having a width substantially the same as the thickness of the secondary construction general segment 30 provided inside the primary construction segment 20 as shown in FIG. 35, 35 are connected to the first side ring part body 5 by a connecting plate 36, and a plate-shaped second connecting ring member 37 is provided between the second side ring part bodies 35, 35.
It is possible to form a secondary construction segment 44 in which a plurality of second flexible members 40 each having a bendable portion 41 formed in the middle are connected.

A protrusion 38 for receiving and supporting the end portion of the second flexible member 40 is formed in the middle of the plate-like second connecting member 37, and the protrusion 38 and the plate-like second connecting member are formed. Then, the end portions of the second flexible member 40 are oppositely set as shown in FIG. 8, and these end portions are fixed by the bolts 43 via the holding plate 42.

That is, by forming the secondary construction segment 44 as shown in FIG. 8 inside the primary construction segment, the plate-like second connecting member 37 of the secondary construction segment 44 forms appropriate flatness. However, it is obvious that the flexible portion 41 of the second flexible member 40 can secure a large flexibility after the secondary construction as in the primary construction segment.

As an example, the outer diameter is 2750 mm and the inner diameter is 250.
In the flexible segment of the present invention of FIG. 4 having a width of 0 mm and a width of 900 mm, the expansion / contraction amount is ± 100 mm, the bending angle is 4 °,
Water pressure resistance at an eccentricity of 100 mm is 2 kg / internal and external pressure.
It can withstand cm ² and can respond quickly to the setting conditions required for this type of segment, and this is the same for the secondary construction segment 44.

[0034]

As described above, according to the present invention, the segment for the secondary construction of the shield construction method is appropriately provided with flexibility for immediately responding to earthquake resistance or uneven settlement, and has a simple structure. In addition, it can be handled in the same way as a standard general segment in handling during excavation work, has a small number of parts, etc. and is excellent in workability. Both ends of each of the construction segments are stably fixed to the connecting ring member so that peeling does not occur and less stress is generated, resulting in highly durable construction. The present invention has an effect that a sufficient space can be obtained for various members, piping, wiring, etc. between them, and is an invention having a great effect industrially.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a primary construction state of a flexible segment according to the present invention.

FIG. 2 is a partially cutaway perspective view showing the assembled state.

FIG. 3 is a cross-sectional view showing the connection relationship of the flexible portion of the primary construction segment according to the present invention.

FIG. 4 is an explanatory view of a cross-sectional deformation that shows the molded state (natural state in which the restraint is released) of the primary construction segment flexible member and its assembly and expansion / contraction operation states in the present invention.

FIG. 5 is a sectional view showing one of the secondary lining states of the flexible segment according to the present invention.

FIG. 6 is a partial perspective view of the secondary water blocking band as seen from the outer surface side.

FIG. 7 is also a perspective view of an additional piece connecting portion of the secondary water blocking band.

FIG. 8 is a sectional view of another example of the first and second construction segments of the present invention in a state of secondary lining similar to FIG.

FIG. 9 is a cross-sectional view showing an assembled state for primary construction as a conventional flexible segment.

FIG. 10 is a cross-sectional view of a member mounting state for the secondary construction.

FIG. 11 is a cross-sectional view showing a completed state of the secondary lining.

[Explanation of symbols]

 1 1st flexible member 2 Presser plate 3 1st connection ring member 3a End plate 4 Flexible part 5 1st side ring part body 7 Skin plate 8 Thrust receiving bolt 9 Thrust receiving member 11 Joint end surface 12 Secondary lining frame Body 12a Coupling material 13 Coupling element 14 Seal ring 15 Secondary water stop band 16 Sealing member 16a The sealing part 17 Attaching piece 18 Attaching plate 18a The locking claw portion 19 The mounting plate 19a The locking claw portion 20 Standard type Primary segment 21 Frame segment 22 Thrust receiving material 23 Secondary lining 24 Secondary water blocking material 25 Mounting bolt 26 Mounting bar 26 Bearing bar 27 Bearing sleeve 28 Anchor material 29 Inner skin plate 30 Secondary construction General segment 31 Shield machine shell 35 Second side ring part body 36 Connection plate 37 Plate-shaped second connection ring member 38 Protrusion 40 Second flexible member 41 Flexible part 42 For example the plate 43 bolt 44 secondary construction segment

Claims (2)

[Claims] 1. A first side ring portion having substantially the same thickness as a primary construction general segment that is thrust and set in an excavation hole by receiving thrust from a propulsion and excavation mechanism is provided opposite to the first side ring portion. In the skin plate provided on the outer peripheral side between the ring parts, a chevron bend is formed in the middle toward the outer circumferential direction, and joint end face portions parallel to both sides of the chevron bend are folded back into a uniform thickness, and they are formed. Primary construction in which a flexible portion is formed by alternately incorporating and connecting a plurality of first flexible members, which sandwich and sandwich an end plate of a first connecting ring member and a holding plate in a joint end face portion, alternately. A segment and a second side ring portion body having a width substantially the same as the thickness of the secondary construction general segment provided inside the above-mentioned primary construction general segment are connected to the first side ring portion body to form a pair. Set up those second services Secondary construction of the shield construction method, which comprises a secondary construction segment in which a plurality of second flexible members having a flexible portion formed in the middle between the plate-shaped second coupling ring member and the idling body are coupled to each other. Flexible segment. 2. A ridge for receiving and supporting an end of the second flexible member is formed in the middle of the plate-shaped second connecting ring member, and the ridge and the plate-shaped second connecting ring member are provided with a second flexible member. The flexible segment for secondary construction of the shield construction method according to claim 1, wherein the end portion of the member is set and fixed by a pressing plate.