JP2016017274A - Expansion joint and flexible segment for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion joint for a structure that allows sharing of components for a contacting part, with segments of various sizes.SOLUTION: An expansion joint (1) for a structure is disposed on a joint part (4) between a ring-form segment (2) and an opposite-side part (3) laid in a cylindrical hole, and includes: a ring-form expansion part (6) made of a flexible material disposed over the joint part (4) and having a block-form pressing part (5) on both sides, the pressing part being pressed against the segment (2) and the opposite-side part (3); a contacting part (7) placed over the pressing part (5) along a circumferential direction; and a plurality of fixing units (8) for pressing and fixing the contacting part (7) on the segment (2) and the opposite-side part (3) at a plurality of locations along a circumferential direction of the contacting part (7), such that the pressing part (5) is pressed against the segment (2) and the opposite-side part (3). The contacting part (7) includes a plurality of contacting part units (9) of a long linear form, disposed polygonally along the circumferential direction of the pressing part (5).SELECTED DRAWING: Figure 2

Description

  The present invention relates to an expansion joint for a structure and a flexible segment, and more particularly to a structure disposed in a joint between a ring-shaped segment laid in a cylindrical hole such as a tunnel and a ring-shaped counterpart. The present invention relates to an expansion joint and a flexible segment.

  In the shield method, etc., in order to keep the excavated tunnel from collapsing while excavating with the tunnel propulsion device, the segment pieces are connected and integrated in the circumferential direction to form a segment for one ring. Covering the peripheral surface, and further connecting the segments in the axial direction of the tunnel. A structure such as a building is usually installed at the start point and end point of a tunnel, and the joints formed between this structure and the start point or end point segment block the influence of vibration and the like. Therefore, an expansion joint for a structure is provided. In addition, in areas where there is a risk of land subsidence due to the passage of large vehicles, etc. located at the lower part of the road or at the boundary between hard and soft strata, it is formed between the segments that are connected to each other. In some cases, expansion joints for structures are disposed on the joints.

  In addition, the inside and outside of the water are stopped at joints that are connecting parts such as underdrains that are constructed in the ground such as waterways and joint grooves that are concrete structures constructed of concrete or the like. In this case, the concrete structure on both sides sinks unevenly or the distance between the concrete structures on both sides with the joints shifted due to the effects of an earthquake, etc. Flexible expansion joints for structures are used.

  Conventionally, an expansion joint for a structure disposed at a joint between a ring-shaped segment and a ring-shaped counterpart has been configured as follows.

  That is, in the prior art, since the segment usually has a large diameter of several meters, the abutting portion that covers the entire circumferential direction of the pushing portion of the expansion / contraction portion is divided into a plurality of arc-shaped units. A plurality of arc-shaped units were connected and combined and fixed to the contact portion.

JP 2012-225037 A JP 2001-193391 A

  Since the abutment portion is divided into a plurality of arc-shaped units, the arc size of the arc-shaped unit differs when the segment size is different. There is a problem in that it is necessary to prepare a corresponding arc-shaped unit, and it is not possible to share the components of the contact portion.

  Accordingly, the present invention provides a structure expansion joint and a flexible segment that can solve the above-described problems of the prior art and can share the parts of the contact portion even if the segment sizes are different. It is.

  In order to solve the above problems, an expansion joint for a structure according to the present invention is provided between a ring-shaped segment laid in a cylindrical hole and a ring-shaped mating portion that is a segment or a structure facing the segment. An expansion joint for a structure disposed on a joint portion of the ring, having a block-shaped push portion disposed on both sides, which is disposed across the joint portion and pressed against the segment and the mating portion. A stretchable portion of a natural material, a contact portion that covers the circumferential direction of the push portion, and the contact portion, the segment and the segment so that the push portion is pressed against the segment and the counterpart portion. A plurality of fixing units for pressing and fixing to a plurality of locations at intervals in the circumferential direction of the abutting portion with respect to the mating portion, and the abutting portion includes a plurality of abutting portions along the circumferential direction of the pushing portion. Squarely arranged Characterized in that it has a plurality of abutment unit formed in a linear longitudinal shape that.

  The fixing unit is configured to press and fix the abutting unit at a position adjacent to the abutting unit adjacent to each other.

  In addition, the fixed unit includes a pressure portion that covers the contact portion, and a bolt and nut for pressing and attaching the pressure portion to the segment and the counterpart portion, and the pressure portion is the pressure portion. A short leg positioned inside and a long leg positioned outside the pushing portion, and the bolt and nut is located outside the pushing portion and inside the long leg at the lower end of the long leg. The pressing portion can be pushed and attached to the segment and the mating portion with fulcrum as a fulcrum.

  In addition, the pressure-applying portion includes a corner contact portion for locking a corner portion of the contact portion unit, and the contact portion unit includes the push portion by the adjacent corner contact portion and the corner contact portion. It is characterized by being positioned along the circumferential direction.

  The pressure contact portion has a lower receiving portion for locking a lower end portion of the contact portion unit, and the contact portion unit is supported by the adjacent lower receiving portion and the lower receiving portion. It is characterized by that.

  In addition, the pressure-applying portion has a pair of standing wall portions, and the pair of wall portions have an interval for preventing the nut of the bolt and nut from rotating.

  The contact unit is formed in a U-shaped cross section.

  In addition, the flexible segment according to the present invention can be laid in a cylindrical hole including at least two ring-shaped segments and a structure expansion joint disposed in a gap between the opposing segments. The expansion joint for a structure, which is a flexible segment, is disposed across the gap, and is an expansion / contraction portion of a ring-shaped flexible material having a block-like pressing portion that is pressed against each of the opposing segments. And the abutting portion that covers the circumferential direction of the pushing portion, and the abutting portion against each of the opposing segments so that the pushing portion is pressed against each of the opposing segments. A plurality of fixing units for pressing and fixing at a plurality of locations at intervals in the circumferential direction of the contact portion, and the contact portion is arranged in a polygonal shape along the circumferential direction of the push portion Straight line Characterized in that it has a plurality of abutment unit formed in the hand shape.

  According to the configuration of the present invention, the contact portion has a plurality of contact portion units formed in a linear longitudinal shape arranged in a polygonal shape along the circumferential direction of the push portion, and therefore the target segment Even if the size of the mating part is different, by forming a polygon using a common abutting part unit, a corresponding arc-shaped unit is prepared for each different size of the target segment etc. You can eliminate the need.

  In addition, since the fixed unit presses and fixes the abutting unit at the position adjacent to the abutting unit adjacent to each other, the fixing unit can efficiently fix the abutting unit adjacent to each other while positioning each other. it can.

  In addition, the pressure part has a short leg located inside the push part and a long leg located outside the push part, and the bolt and nut is located outside the push part and inside the long leg. Since the pressure part can be pushed and attached to the segment etc. with the lower end of the bolt as a fulcrum, it is possible to easily adjust the tightening force by the bolt and nut to a desired magnitude by adjusting the tightening degree by the bolt and nut. .

  In addition, since the pressure-applying portion has the corner contact portion and the lower receiving portion, the contact portion unit can be easily positioned along the circumferential direction of the push portion.

  In addition, since the pressure portion has a pair of standing wall portions, the nut of the bolt and nut can be prevented from rotating, and the pressure portion can be easily tightened by the bolt nut.

  Further, since the flexible segment includes at least two ring-shaped segments that are flexibly connected by an expansion joint for a structure, the flexible segment can be easily used for a region having a width that exceeds the width of a single segment. For example, it is possible to obtain impact resistance in a region where the vibration impact is large and flexibility is required in the shield method or the like.

Sectional drawing which shows one Embodiment of the expansion joint for structures which concerns on this invention. The figure seen from AA of FIG. The perspective view which shows the external appearance of the whole expansion joint for structures. The side view (a) and sectional drawing (b) which show a contact part unit. The figure which shows assembling | attaching a contact part unit and a pressure part to an expansion-contraction part. The perspective view which shows a pressure part and a bolt nut. The front view which shows a pressing part. The side view which shows a pressing part. The rear view which shows a pressing part. The cross-sectional view which shows a pressing part. The longitudinal cross-sectional view which shows the pressing part.

  An embodiment of a structure expansion joint according to the present invention will be described with reference to the drawings. FIG. 1 shows a ring cross section of a structure expansion joint 1 formed in a ring shape. FIG. 2 is a view as seen from AA in FIG. FIG. 3 shows the overall appearance.

  The expansion joint 1 for a structure is formed between a ring-shaped segment 2 laid in a cylindrical hole such as a tunnel and a ring-shaped mating portion 3 that is a second segment facing the segment 2 or a structure such as a building. The joint portion 4 is disposed. Here, a second segment is assumed as the counterpart 3.

  As shown in FIG. 1, the segment 2 includes a segment mounting portion 2a in the shape of a cylindrical ring that can be mounted inside, and a segment body 2b. The segment mounting portion 2a includes an inner ring portion 2aa and an outer ring portion 2ab. Have. Similarly, the mating portion 3 includes a mating portion mounting portion 3a and a mating portion main body 3b that can be mounted inside, and the mating portion mounting portion 3a has an inner ring portion 3aa and an outer ring portion 3ab. The segment attachment portion 2a is attached to the segment main body 2b at the outer ring portion 2ab by, for example, anchor bolts 2c. The mating portion attaching portion 3a is attached to the mating portion main body 3b by an anchor bolt 3c in the outer ring portion 3ab. The expansion joint for structure 1 is disposed between the inner ring portion 2aa of the segment mounting portion 2a and the inner ring portion 3aa of the mating portion mounting portion 3a.

  The expansion joint 1 for a structure is disposed over the joint portion 4 and has a ring-shaped flexible material expansion / contraction section 6 having block-shaped pressing sections 5 pressed on both sides of the segment 2 and the mating section 3; The abutting portion 7 that covers the entire circumferential direction of the pressing portion 5 and the abutting portion 7 against the segment 2 and the mating portion 3 so that the pressing portion 5 is pressed against the segment 2 and the mating portion 3. And a plurality of fixing units 8 for pressing and fixing at a plurality of locations at intervals in the circumferential direction of the contact portion 7.

  A corrugated section is formed between the pressing portions 5 on both sides of the stretchable portion 6, and the stretchable portion 6 can be stretched by expanding and contracting when the interval between the segment 2 and the counterpart portion 3 changes. It can correspond to. A reinforcing cloth 6a is embedded in the stretchable portion 6 in a sheet shape. A protrusion 5a is formed on the end surface of the pressing portion 5, and when the pressing portion 5 is pressed, the sealing performance is surely secured to the surfaces of the inner ring portion 2aa and the inner ring portion 3aa. Yes.

  The contact portion 7 includes a plurality of contact portion units 9 formed in a linear longitudinal shape, and the plurality of contact portion units 9 are continuously disposed along the circumferential direction of the push portion 5. It arrange | positions so that a square may be formed.

  The fixing unit 8 presses and fixes each contact portion unit 9. In the present embodiment, the fixing unit 8 presses and fixes the contact unit 9 at a position adjacent to the contact unit 9 adjacent to each other. As a result, the angles at which the contact unit 9 adjacent to each other form a polygon can be stably fixed and held. Note that the fixing unit 8 can be pressed and fixed at the center of each contact unit 9 instead of pressing and fixing the contact unit 9 at a position adjacent to the contact unit 9 adjacent to each other. is there. As shown in FIG. 4, the contact unit 9 is formed in a straight longitudinal shape and has a U-shaped cross section.

  The fixed unit 8 includes a pressure portion 10 that is put on the contact portion unit 9, and a bolt nut 11 that includes a bolt 11 a and a nut 11 b for pressing and attaching the pressure portion 10 to the segment 2 and the counterpart portion 3.

  The pressure part 10 is attached to the inner ring part 2aa of the segment attaching part 2a and the inner ring part 3aa of the mating part attaching part 3a by bolts and nuts 11.

  As shown in FIG. 1, the pressure portion 10 has a short leg 12 positioned on the inner side of the push portion 5, that is, on the side where the wavy portion of the telescopic portion 6 is present, and the outer portion of the push portion 5, that is, the wavy portion of the telescopic portion 6 It has a long leg 13 located on the side.

  The bolt nut 11 can push and attach the pressure portion 10 to the segment 2 and the mating portion 3 with the lower end portion 13 a of the long leg 13 as a fulcrum at a position outside the push portion 5 and inside the long leg 13. Thus, the bolt nut 11 presses and attaches the pressure-applying portion 10 to the segment 2 and the mating portion 3 at a position outside the pushing portion 5 and inside the long leg 13, so that the lower end portion 13a of the long leg 13 is a fulcrum. As a result, the tightening force by the bolt and nut 11 can be effectively applied to the pressing portion 5. In the prior art, the lengths of the legs corresponding to the short legs 12 and the long legs 13 of the pressure portion 10 are the same, and even when the pushing portion 5 of the expansion / contraction portion 6 is initially tightened, it is delayed. Even if an attempt is made to retighten in order to restore hermeticity when loosened, the lower ends 13a of the long legs 13 cannot act as fulcrums because the lengths of the legs are the same, and the bolts and nuts are tightened. There was a problem of not being able to do it.

  FIG. 5 shows a state in the middle of assembling the contact part unit 9 and the pressure part 10 to the expansion / contraction part 6. As shown in FIG. 5, the abutting unit 9 is put on the pushing portion 5 of the extendable portion 6. As shown in FIG. 1, the pressing portion 5 and the abutting portion unit 9 are pressed against the surfaces of the inner ring portion 2aa and the inner ring portion 3aa by the bolts and nuts 11.

  Next, the pressing part 10 will be described with reference to FIGS. FIG. 6 is a perspective view showing the pressure member 10 and the bolt nut 11. 7 is a front view showing the pressure part 10, FIG. 8 is a side view showing the pressure part 10, FIG. 9 is a rear view showing the pressure part 10, and FIG. 10 is a cross-sectional view showing the pressure part 10. . FIG. 11 is a vertical cross-sectional view showing the pressure unit 10.

  The short legs 12 and the long legs 13 of the pressure part 10 are erected from the front side of the substrate part 10a at positions facing each other. Bolt holes 10b through which the bolts 11a pass are formed in the substrate portion 10a. At the center of the short leg 12, a corner pad 14 for locking the corner 9a of the small triangular prism-shaped contact unit 9 is formed. As shown in FIG. 2, the abutting unit 9 is positioned along the circumferential direction of the pushing portion 5 by the adjacent corner contact portions 14, 14.

  The long legs 13 are provided with a pair of bottom receiving portions 15 extending in a direction orthogonal to the long legs 13. As shown in FIG. 2, the longitudinal inner surface of the contact portion unit 9 positioned by the corner contact portions 14, 14 is supported at the distal end portion of the lower receiving portion 15. One contact part unit 9 can be easily positioned by the corner contact part 14 and the lower receiving part 15 of the adjacent pressure part 10. The adjacent abutting unit 9 positioned by the corner contact part 14 and the lower receiving part 15 are arranged in a relationship forming an angle formed by a predetermined polygon, and as a result, the entire abutting part The unit 9 is continuously arranged in a polygonal shape along the circumferential direction of the pressing portion 5.

  Moreover, a pair of wall parts 16 and 16 are standingly arranged by the back side of the board | substrate part 10a. A pair of wall parts 16 and 16 are provided in the space | interval which pinches | interposes so that the nut 11b of the bolt nut 11 may be prevented. As shown in FIG. 1, for example, the inner ring portion 2aa is inserted from the inner side of the inner ring portion 2aa into the bolt hole 10b of the pressure portion 10 and is placed between the wall portions 16 and 16 so as to be prevented from rotating. The bolt 11a can be rotated with respect to a certain nut 11b, and the bolt 11a and the nut 11b can be screwed together.

  According to the configuration of the present embodiment, the contact portion 7 has a plurality of contact portion units 9 formed in a linear longitudinal shape, and the plurality of contact portion units 9 are pushed so as to form a polygon. By disposing along the circumferential direction 5, it is possible to attach the stretchable part 6 to the segment 2 and the mating part 3 over substantially the entire circumference of the pushing part 5. As a result, even when the size of the target segment 2 or the like is different, a polygon can be formed using the common abutting portion unit 9, so that the abutting portion is made up of a plurality of circles as in the prior art. The problem that occurs when dividing into arc-shaped units, that is, the problem that it is necessary to prepare a corresponding arc-shaped unit every time the size of the target segment is different can be solved. When the size of the target segment 2 or the like is different, the interval between the adjacent fixed units 8 is made substantially constant corresponding to the length of the abutting unit 9, and the adjacent fixed units 8 are arranged mutually. What is necessary is just to adjust the angle of the polygon which the contact part unit 9 which adjoins changes an angle.

  Further, the fixing unit 8 presses and fixes the abutting unit 9 at a position adjacent to the abutting unit 9 adjacent to each other, that is, a position where the adjacent abutting unit 9 is connected, so that the fixing unit 8 is adjacent to each other. The abutting unit 9 can be efficiently fixed while being positioned relative to each other.

  The fixed unit 8 has a pressure portion 10 that covers the contact portion unit 9 that constitutes the contact portion 7, and a bolt nut 11 that presses and attaches the pressure portion 10 to the segment 2 or the like. The pressure part 10 has a short leg 12 located inside the push part 5 and a long leg 13 located outside the push part 5, and the bolt nut 11 is outside the push part 5 and inside the long leg 13. At this position, the pressure-receiving portion 10 can be pushed and attached to the segment 2 or the like with the lower end portion of the long leg 13 as a fulcrum, so that the tightening force by the bolt nut 11 is adjusted to a desired magnitude by adjusting the tightening degree by the bolt nut 11 In the conventional case where the lengths of the short legs and the long legs are the same, it is impossible to make further tightening in order to improve the sealing performance of the push part 5 of the expansion / contraction part 6 Questions It can be eliminated.

  Moreover, since the contact pressure part 10 has the corner contact part 14 for latching the corner | angular part 9a of the contact part unit 9, the contact part unit 9 is applied to the adjacent corner contact part 14 and the corner contact part 14 Thus, it becomes possible to easily position along the circumferential direction of the push portion 5.

  Further, the pressure unit 10 has a lower receiving part 15 for locking the lower end part of the contact part unit 9, so that the contact part unit 9 is supported by the adjacent lower receiving part 15 and the lower receiving part 15. It can be easily positioned.

  Further, the pressure part 10 has a pair of standing wall parts 16, 16, and the nut 11 b can be prevented from rotating by the pair of wall parts 16, 16. It can be easily tightened.

  Next, the flexible segment laid in the cylindrical hole will be described. The flexible segment includes at least two ring-shaped segments and a structure expansion joint 1 disposed in a gap between the opposing segments.

  In at least two segments, for example, the first, second, and third three segments, the gap between the first segment and the second segment and the gap between the second segment and the third segment described above By disposing the object expansion joint 1, a flexible segment can be formed over the length of about three single segments. And the flexible segment over the length of these 3 pieces is caught as a new segment, and it connects to the segment 2 or the other party part 3 via the above-mentioned expansion joint 1 for structures at the both ends.

  Since the flexible segment includes at least two ring-shaped segments that are flexibly connected by the expansion joint 1 for a structure, it can be easily applied to an area that requires a length that exceeds the width of a single segment. For example, it is possible to obtain impact resistance in a region where the vibration impact is large and flexibility is required in the shield method or the like.

DESCRIPTION OF SYMBOLS 1 Structure expansion joint 2 Segment 3 Counterpart 4 Joint part 5 Push part 6 Expansion / contraction part 7 Contact part 8 Fixing unit 9 Contact part unit 10 Pressure part 11 Bolt nut 12 Short leg 13 Long leg 14 Cornering part 15 Lower part 16 Wall part

Claims (8)

An expansion joint for a structure disposed in a joint between a ring-shaped segment laid in a cylindrical hole and a ring-shaped mating portion that is a segment or a structure facing the segment,
An elastic part of a ring-shaped flexible material that is disposed across the joint and has a block-like pressing part that is pressed against the segment and the mating part,
An abutting portion that is covered over the circumferential direction of the pushing portion;
The abutting portion is pressed and fixed at a plurality of locations at intervals in the circumferential direction of the abutting portion with respect to the segment and the mating portion so that the pressing portion is pressed against the segment and the mating portion. A plurality of fixed units for,
With
The abutment part has a plurality of abutment part units formed in a linear longitudinal shape arranged in a polygonal shape along the circumferential direction of the push part, and the expansion joint for structures according to claim 1. The expansion joint for a structure according to claim 1, wherein the fixing unit presses and fixes the abutting unit at a position adjacent to the abutting units adjacent to each other. The fixed unit has a pressure part that covers the contact part, and a bolt and nut for pressing and attaching the pressure part to the segment and the counterpart part,
The pressure part has a short leg located inside the push part and a long leg located outside the push part,
The bolt and nut can be attached to the segment and the mating part by pressing the pressure-applying part with the lower end of the long leg as a fulcrum at a position outside the pushing part and inside the long leg. The expansion joint for a structure according to claim 1, wherein the expansion joint is for a structure. The pressure-applying portion has a corner contact portion for locking a corner portion of the contact portion unit, and the contact portion unit has a peripheral portion of the push portion by the adjacent corner contact portion and the corner contact portion. The expansion joint for structure according to claim 3, wherein the expansion joint for a structure according to claim 3 is positioned along a direction. The contact portion has a lower receiving portion for locking the lower end portion of the contact portion unit, and the contact portion unit is supported by the adjacent lower receiving portion and the lower receiving portion. The expansion joint for a structure according to claim 4, wherein the expansion joint is for a structure. 5. The structure according to claim 4, wherein the pressure portion includes a pair of standing wall portions, and the pair of wall portions have an interval for preventing rotation of a nut of the bolt and nut. Expansion joints. The expansion joint for a structure according to any one of claims 1 to 6, wherein the abutting unit is formed in a U-shaped cross section. A flexible segment laid in a cylindrical hole comprising at least two ring-shaped segments and a structural expansion joint disposed in a gap between the opposing segments;
Expansion joints for structures
A ring-shaped flexible material expansion / contraction section having a block-shaped pressing section disposed on both sides, which is disposed across the gap and pressed against each of the opposing segments;
An abutting portion that is covered over the circumferential direction of the pushing portion;
The abutting portion is pressed and fixed at a plurality of locations at intervals in the circumferential direction of the abutting portion against each of the opposing segments so that the pressing portion is pressed against each of the opposing segments. A plurality of fixed units for,
With
The said contact part has a some contact part unit formed in the linear longitudinal form arrange | positioned polygonally along the circumferential direction of the said press part, The flexible segment characterized by the above-mentioned.

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