JP4419820B2 - Ring fitting for segment - Google Patents

Description

  The present invention relates to a ring joint for connecting segments used in a civil engineering structure such as a tunnel.

  As a tunnel construction method, the shield construction method, which is one of the main construction methods, is a construction method for constructing a tunnel by propelling the shield into the ground and preventing the earth and sand from collapsing while being held by the shield shell and segments.

  FIG. 7 shows a bolted joint as a prior art 1 of a ring joint in which the segment rings, which are ring-shaped segment members, are connected in the axial direction in the shield method. This bolted joint is formed by making holes in the segment rings 105 and 106 and fastening them with bolts 101 and nuts 103. In the figure, reference numeral 104 denotes a washer.

  Further, as prior art 2, FIG. 8 shows a ring joint of a tunnel lining segment of Patent Document 1. In FIG. This is a ring joint 214 for connecting two tunnel lining segments 210, 212 having ring joint surfaces 216, 218 opposite to each other, the ring joint of the segment being fixed to one segment 210. A pin 222 having a tapered tip 234 and a waist 236 with a constriction 238 extending from 216, and an insertion space 224 for the pin 222 open to the ring surface 218 of the other segment 212. A pair of movable members 226 and 228 which are held in the insertion space 224 so as to be inserted into each other in the transverse direction of the pin 222 inserted into the insertion space 224, and are inserted into the insertion space 224. Inserted from the tip 234 of the pin 222 to the constriction 238 of the body 236 And the hole 252 that can be expanded by the movement of the movable members 226 and 228 is cooperatively defined, and the contact surfaces of both movable members are inclined from the front to the rear with respect to the insertion direction of the pin 222. (244) a pair of movable members 226, 228 and at least two spring members 230, 232 held in the insertion space 224 of the other segment 212, with respect to both the movable members 226, 228. A ring joint 214 including at least two spring members 230, 232 each exerting a spring force to limit the opening of the hole 252.

  In the figure, 240 is a reinforcing plate embedded in the segment 210 and welded to the pin 222, 242 is welded to the pin 222, and anchor bars 258 embedded in the segment 210 are embedded in the segment 212. , A reinforcing plate exposed on the ring joint surface 218, 260 is a plate embedded in the segment 212, 262 is a frame welded to both plates 258 and 260, and 264 and 266 are formed on both plates 258 and 260. , A through hole 268 of the pin 222 is an anchor bar embedded in the segment 212.

  In Patent Document 2, a male member having a taper on the inner peripheral surface so that the thickness of the cylindrical member is gradually decreased as the tip portion is formed becomes smaller at the center portion than at the tip portion and the bottom portion. A joint designed to be inserted into a female hole having a reduced cross section is described. Patent Document 3 also serves as a positioning guide for assembly that can contact a tunnel circumferential joint member in a steel shell segment between opposing members. A steel shell segment having a complicated structure composed of a plate-shaped steel member having a joint portion having an engagement concave portion and an engagement convex portion is described. Patent Document 4 describes a tapered head portion whose diameter decreases toward the tip. A male joint having an elastically deformable plate body, and a hook portion that protrudes inward from the front portion of each plate body and engages with the bottom portion of the male joint when the head portion of the male joint is inserted. A joint that is joined by inserting it into a female joint In Patent Document 5, a joint fitting is described in which a male with a cylindrical recess and a hook spring arranged in a cylindrical shape are combined. In Patent Document 6, a male with a cylindrical constriction is arranged in a cylindrical shape. The joint structure of the segment which combined the leaf | plate spring is described, and patent document 7 describes the female-type member provided with the fixing hole which has a taper-shaped inner peripheral surface where a cross section spreads gradually toward a bottom part, and said fixing A joint is described that combines a male member of an outer shape that fits into a hole.

JP 2003-328893 A JP 2003-193797 A JP 2002-81297 A JP 2002-106292 A JP 2001-107688 A JP-A-10-82283 JP 2003-262092 A

  However, the bolt-joint joint of Prior Art 1 has a problem that the hole position of the joint surface must be accurately matched. In general, it is necessary to perform the tightening operation of the bolt in a narrow space and at a high place. In such a case, the bolt tightening operation becomes complicated and difficult, and a lot of time and cost are required.

  On the other hand, the related art 2 is a complicated mechanism using the spring members 230 and 232, and the number of parts of the joint 214 is large, so that the processing and manufacturing of the joint are expensive. In the segment method, a large number of ring joints are required, and the high cost of the joints is a big problem.

  Furthermore, the prior arts described in Patent Documents 2 to 7 also have problems that the structure is complicated and the enforcement is not easy.

  The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a segment ring joint that is inexpensive, easy to construct, and has a high pulling strength.

This onset Ming is a joint for connecting the segments to construct the tunnel wall in the tunnel axis, one of the two segments member positioned in the axial direction of the tunnel, a male joint provided on one segment member And a female joint provided on the other segment member located on the surface facing the one segment member, and the male joint is a male joint head protruding in a direction of fitting with the female joint, A male joint constriction portion, a male joint shaft portion, and the female joint has a male joint head portion, the male joint constriction portion, and a female joint hole portion of a size that can be inserted through the male joint shaft portion, A plate member having a plate member deforming portion and a plate member fixing portion is disposed on the back surface of the female joint hole, and when the male joint is inserted, the plate member deforming portion is deformed in the insertion direction, and the male After the joint head is inserted into the plate member deformation portion, the plate The material deforming portion is elastically restored to engage with the male joint constricted portion, and the plate member is further provided with a reinforcing member for suppressing deformation of the plate member deforming portion with respect to a pulling force. The above-described problems are solved by the segment ring joint.
Oite this onset bright, furthermore, said one segment member said male coupling through hole is provided that can penetrate, provided that the inner circumferential surface and each screw groove on an outer peripheral surface of the male coupling shaft portion of the through hole The male joint shaft and the through hole are engaged with each other so that the male joint is fixed to the one segment member, and the male joint shaft is rotated and retracted in the direction opposite to the insertion direction. Thus, the clearance between the plate member deforming portion and the male joint constriction portion may be adjusted.

  Further, the two plate members may be disposed so as to make a pair on the back surface of the female joint hole.

  Further, a notch portion may be provided in a portion of the plate member deformed portion that engages with the constricted constricted portion to ensure the fitting and increase the pulling strength.

  Further, irregularities may be formed on the engagement surfaces of the male joint and the female joint to ensure fitting and increase the pulling strength.

  Furthermore, the male joint and the female joint may be made of steel.

  Furthermore, the plate member may be spring steel.

In the ring joint according to the present invention, the joint can be fitted and the segments can be connected simply by inserting the male joint into the female joint, and bolt tightening work is not required as in the bolt joint. In addition, since the diameter of the female joint hole is set with a predetermined clearance with respect to the male joint shaft, even if there is some deviation in the joint position between the two segment members, the segment connection Is possible. Further, the reinforcing member is provided on the plate member, and the deformation of the plate member deforming portion with respect to the pulling force can be suppressed. In addition, a through hole through which the male joint can pass is provided in one segment member, and a thread groove is provided in each of the inner peripheral surface of the through hole and the outer peripheral surface of the male joint shaft portion. When the male joint is fixed to the one segment member by meshing , even if fine adjustment of the clearance between the male joint and the female joint is necessary, it can be performed relatively easily.

  As described above, the construction work at the site is reduced as compared with the prior art such as a bolted joint, and an effect of reducing the construction cost and the construction period can be obtained.

  Furthermore, the ring joint according to the present invention is mainly composed of a simple plate-like member, and the drilling process is also simple (there is no taper in the depth direction and has the same diameter). Work is easy. Therefore, the effect of reducing the manufacturing cost of the joint and improving the workability can be obtained, and the manufacturing accuracy can be easily ensured.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(A) Left side surface of male joint 10 and female joint 30 of reference embodiment provided with a part of the components of the present invention before fitting segment members 1 and 2 in FIGS. The figure and (B) sectional drawing seen from the front are shown. Of the two segments 1 and 2 located in the axial direction of the tunnel, one (right side in the figure) segment member 1 is provided with a male joint 10, and the other (left side in the figure) segment member 2 is provided with a female joint 30. Is provided.

  The male joint 10 includes a male joint head portion 12, a male joint constricted portion 14, a male joint shaft portion 16, and a male joint screw head portion 20. The male joint screw portion 18 is fixed to the segment member 1.

  The female joint 30 includes a female joint hole 32, and a plate member 34 including a plate member fixing portion 34a, a plate member deforming portion 34b, and a plate member notch portion 34c, and is welded via the plate member fixing portion 34a. It is fixed to the segment member 2 by joining or the like. The female joint hole 32 is set to a size that allows the male joint 10 to be inserted with a predetermined clearance. The plate member notch 34c is set to a size that engages with the male joint constriction 14 after the male joint is inserted.

  The plate member 34 has relatively high rigidity, and is configured such that the plate member deforming portion 34 b is deformed when the male joint 10 is inserted into the female joint 30. The plate member fixing portion 34a has a strength capable of maintaining the state in which the plate member 34 is fixed to the segment member 2 when a male joint is inserted or when a pulling force is applied after the male joint is inserted. .

  FIG. 2 shows a state in which the male joint 10 is being inserted into the female joint 30. When the male joint 10 is inserted into the female joint 30, the plate member deforming portion 34 b is deformed into a cantilever shape as indicated by an arrow A. With respect to the direction in which the male joint 10 is inserted into the female joint 30, the deformable length L of the plate member deforming portion 34b is large, so that the plate member deforming portion 34b is deformed with a small force. When the plate member deforming portion 34b is deformed by a certain amount, the plate member notch portion 34c is fitted into the male joint constricted portion 14 as shown by an arrow B in FIG. Thereby, the state which connected the segment members 1 and 2 can be maintained. In addition, since the diameter of the female joint hole 32 is set large with a predetermined clearance with respect to the male joint shaft portion 16, there is a slight shift in the joint position between the segment member 1 and the segment member 2. Even in this case, the segments can be connected. As described above, smooth insertability can be obtained. The plate member notch portion 34c is provided in accordance with the shape of the male joint constriction portion 14, thereby increasing the contact area with the male joint constriction portion 14, so that the plate member notch portion 34c is securely fitted to the male joint constriction portion 14. And the pulling-out strength increases. The plate member notch 34c can be omitted.

When fine adjustment of the clearance between the male joint 10 and the female joint 30 is required, the male joint screw head 20 is rotated as shown by an arrow C as shown in FIG. This is done by retracting the shaft portion 16 to the right in the figure. Thereby, it is also possible to join the male joint 10 and the female joint 30 firmly.

  In addition, in this embodiment, although the shape of the male joint screw part 18 and the male joint screw head 20 was made into the bolt shape, as long as the position of the longitudinal direction of the male joint 10 can be adjusted, it is good also as another shape and method. Further, if fine adjustment of the clearance between the male joint 10 and the female joint 30 is not required, the male joint shaft portion 16 can be used as the segment member 1 without providing the male joint screw portion 18 and the male joint screw head 20. It is also possible to fix directly.

  Furthermore, the shapes of the female joint hole 32, the plate member 34, and the plate member notch 34c are not limited to those shown in the present embodiment, and may be a rectangle, a circle, an elliptical cross section, or the like.

  Further, the number of plate members 34 is not limited to two, and a plurality of plate members 34 may be provided. The installation position of the plate member 34 is not particularly limited as long as it is on the back surface of the female joint 30.

  FIG. 5 shows a state where the pulling force is applied after the fitting. The pulling force is resisted by the plate member notch 34c engaging the male joint constriction 14. At this time, since the deformable length L of the plate member deforming portion 34b is small, the plate member deforming portion 34b hardly deforms with respect to the deformation in the direction of the pulling force. Further, the plate member deforming portion 34b other than the deformable length resists the pulling force with a supporting pressure. As described above, a large pulling strength can be obtained.

Next, an implementation form of the present invention according to claim 1 in FIG. Implementation form of this is to increase the resistance of the plate member 34 with respect to pulling force, is provided with a reinforcing member 36 to the plate member 34.

  The installation position of the reinforcing member 36 is provided at a position where the deformation of the plate member 34 against the pulling force can be suppressed. For example, in this embodiment, the reinforcing member 36 is installed on the plate member at a position directly above the edge of the female joint hole 32.

  Further, as shown in FIG. 6, if necessary, the plate member fixing portion 34a is folded and fixed at the end of the plate member 34 in a right angle direction, or the width N and the fixing length M of the plate member 34 are increased. By doing so, it is possible to increase the resistance force of the plate member 34 and also increase the resistance force of the plate member fixing portion 34a.

  In the above-described embodiment, the shape of the head 12 and the constricted portion 14 of the male joint 10 is a combination of a mushroom shape having a quadratic cross section and a ring-shaped groove. However, the present invention is not limited to this, and a mushroom-shaped head 12a having a semicircular cross section as shown in FIG. 7A, a cylindrical head 12b as shown in FIG. A truncated conical head 12c as shown in FIG. Further, the shape of the constricted portion 14 is not limited to the ring-shaped groove, and may be a stepped portion 14a continuous with the shaft portion 16 as shown in FIGS. 7D and 7E. Furthermore, as shown in FIGS. 7 (F) and (G), a fine unevenness 15 may be provided on the surface in contact with the female joint to increase the coupling force. In addition, unevenness may be provided on the female joint side to further increase the coupling force, or unevenness may be provided only on the female joint side.

Sectional view taken along the ring showing a state before fitting of the joint (A) left side as viewed from the female coupling side view and (B) a front according to a reference embodiment of the present invention Sectional drawing seen from the front which shows the state in which the male joint of reference embodiment is inserted in the female joint Sectional view seen from the front showing the state after fitting (A) Left side view and (B) Front sectional view showing the state where fine adjustment of the clearance between the male joint and female joint is also performed. (A) Left side view and (B) Cross section viewed from front showing resistance to pulling force Sectional view seen from (A) a left side view and (B) the front of the implementation form of a ring joint according to claim 1 of the present invention Sectional view and perspective view showing various modifications of the male joint head and constriction Sectional drawing which shows prior art 1 The perspective view which shows the prior art 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 ... Segment member 10 ... Male joint 12, 12a, 12b ... Male joint head 14, 14a ... Male joint constriction part 16 ... Male joint axial part 18 ... Male joint screw part 20 ... Male joint screw head 30 ... Female Joint 32 ... Female joint hole 34 ... Plate member 34a ... Plate member fixing part 34b ... Plate member deforming part 34c ... Plate member notch 36 ... Reinforcement member

Claims (7)

A joint for connecting the segments constituting the tunnel wall in the tunnel axial direction,
Of the two segment members positioned in the axial direction of the tunnel, a male joint provided on one segment member and a female joint provided on the other segment member positioned on the surface facing the one segment member Configured,
The male joint has a male joint head that protrudes in the direction of fitting with the female joint, a male joint constriction, and a male joint shaft.
The female joint has a female joint hole of a size that allows insertion of the male joint head, the male joint constriction, and the male joint shaft, and a plate member deforming portion, a plate on the back of the female joint hole A plate member having a member fixing portion is disposed,
When the male joint is inserted, the plate member deforming portion is deformed in the inserting direction, and after the male joint head is inserted into the plate member deforming portion, the plate member deforming portion is elastically returned to the male joint. Engage with the constricted neck,
Furthermore, the said ring member is provided with the reinforcement member for suppressing the deformation | transformation of this plate member deformation | transformation part with respect to drawing-out force, The ring joint for segments characterized by the above-mentioned. Further, the one segment member is provided with a through-hole through which the male joint can pass, and a thread groove is provided on each of an inner peripheral surface of the through-hole and an outer peripheral surface of the male joint shaft portion, and the male joint shaft portion The male joint is fixed to the one segment member by meshing with the through-hole, and the plate member deforms by rotating the male joint shaft part in the direction opposite to the insertion direction. The ring joint for segments according to claim 1 , wherein a clearance between the part and a constricted part of the male joint can be adjusted. The ring joint for segments according to claim 1 or 2 , wherein the two plate members are disposed so as to form a pair on the back surface of the female joint hole. The segment ring joint according to any one of claims 1 to 3, wherein a notch portion is provided in a portion of the plate member deforming portion that engages with the constriction portion of the male joint. It said male joint and the segment ring joint according to any one of claims 1 to 4, characterized in that irregularities are formed on the engaging surface of the female coupling. The segment ring joint according to any one of claims 1 to 5, characterized in that the male coupling and the female joint is made of steel. The segment ring joint according to any one of claims 1 to 6 , wherein the plate member is spring steel.

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