High-fastening-force shield segment longitudinal rapid assembling and connecting device

Abstract

The utility model relates to a high-fastening-force longitudinal rapid assembling and connecting device for shield segments. An existing connecting device cannot meet the requirement for assembly errors in the segment assembly process, deformation and damage of a waterproof sealing gasket of a longitudinal seam of a segment are easily caused, the situation of water leakage occurs after segment assembly is completed, and the connecting strength is low. The device comprises a connecting rod and combined pieces assembled at the two ends of the connecting rod, the combined pieces are pre-buried in pipe pieces and comprise outer sleeves and limiting parts, and the outer sleeves are arranged on the peripheries of the limiting parts; the connecting rod comprises a cylindrical body in the middle and rod bodies connected to the two ends of the cylindrical body, the outer wall of each rod body is in a tooth shape and is in tooth engagement with the corresponding limiting part, and a tenon used for assisting segment splicing is arranged on the outer side of the cylindrical body in the middle of the connecting rod; the connecting rods and the assemblies are symmetrically arranged along the circular seam face of the pipe piece. The utility model has the advantages of stronger tolerance capacity, better tensile property, no water leakage of the duct piece and convenience in production and construction.

Description

TECHNICAL FIELD

[0001] The utility model relates to shield segment assembling technical field, concretely relates to a high fastening force shield segment longitudinal quick assembling connecting device. BACKGROUND

[0002] The shield segment is the vital stressed bearing component in the shield tunnel engineering construction process, and resists the external load after tunnel operation. The segments are connected to form a ring segment in the construction, and the front and rear ring segments are assembled in the center axis direction through the ring joint connecting piece. The traditional segment connection adopts the bolt connection mode, which has the phenomena of poor connection precision and weak segment joint stiffness, and the bolt hand hole weakens the segment structure.

[0003] In view of the above shortcomings of bolt connection, in recent years, a new segment connection technology appears in the industry. The existing segment ring joint new connecting piece is pre-buried with a nut in the segment, and when assembling at the construction site, the screw rod is screwed into the pre-buried nut of the upper ring assembled segment, and the next ring segment and the pre-buried nut are combined and assembled with the screw rod connected to the upper ring segment by the shield jack thrust. When assembling, the screw rod is forcibly inserted into the pre-buried nut of the next segment, and the pre-buried nut and the screw rod are both made of nylon material. During assembly, the screw thread is damaged, so that the tightness of the segment ring joint cannot achieve the fastening cooperation of the anti-loose, the connection strength is poor, and whether the connecting device made of nylon material can meet the hundred-year use requirement of the shield tunnel has not been verified.

[0004] In the existing disclosed patent, a kind of connecting device is connected by the cooperation of elastic component, realizes the tooth engagement of connecting piece, can improve the connection strength of segment ring joint connecting piece after assembling, and satisfies the connecting device of ring joint tightness type requirement, but the screw rod needs to be aligned with the center axis of segment pre-buried sleeve for assembling, cannot meet the requirement of precision error in the process of segment assembling, and needs to be inserted into ring joint connecting piece in the state of close contact in the actual application process, which will cause the deformation and damage of segment longitudinal joint waterproof sealing pad, resulting in water leakage after segment assembling is completed;And the pre-buried parts on both sides of ring joint are different, and it is easy to make mistakes during segment assembling, and the construction management difficulty is great.

[0005] Therefore, a connecting device that can meet the precision error in the process of segment assembling, has high connection strength, does not leak after segment assembling is completed and is convenient for construction is urgently needed. SUMMARY

[0006] The utility model aims at providing a high fastening force shield segment longitudinal quick assembling connecting device to at least solve the problems of weak tolerance capacity of existing connecting device, easy to cause segment water leakage and great construction difficulty.

[0007] In order to achieve the above object, the utility model adopts the technical scheme that

[0008] A shield segment longitudinal quick assembling and connecting device with high fastening force, comprising a connecting rod and a combined part assembled at both ends of the connecting rod, the combined part is embedded in a segment and comprises a sleeve and a limiting part, the sleeve is arranged at the periphery of the limiting part;

[0009] The connecting rod comprises a columnar body in the middle and a rod body connected to both ends of the columnar body, the outer wall of the rod body is in the form of teeth and is engaged with the limiting part, a tenon for assisting segment assembling is arranged on the outer side of the columnar body in the middle of the connecting rod;

[0010] The connecting rod and the combined part are symmetrically arranged along the segment ring joint surface.

[0011] Further, the cross-sectional diameter of the rod body of the connecting rod gradually decreases away from the columnar body.

[0012] Further, the sleeve is in the form of a hollow structure with openings at both ends, comprising a cylinder arranged horizontally and a circular table connected to one end of the cylinder, the cross-sectional diameter of the circular table gradually decreases away from the cylinder.

[0013] Further, the limiting part comprises a plurality of wedge blocks, springs and a limiting end cover, the limiting end cover is arranged at one end of the cylinder away from the circular table, the wedge blocks are arranged inside the circular table and are engaged with the rod body of the connecting rod, and the springs are located between the wedge blocks and the limiting end cover.

[0014] Further, the wedge blocks are at least three and are in the form of teeth matched with the outer wall of the rod body.

[0015] Further, the teeth of the rod body and the teeth of the wedge blocks are in the form of steps.

[0016] Further, the limiting end cover is provided with a protrusion in the center towards the inside of the sleeve for limiting the connecting rod.

[0017] Further, a groove for placing the connecting rod and the tenon is reserved between the front end of the combined part and the segment ring joint surface, and the groove is located in the segment.

[0018] Further, the width of the groove gradually decreases from the groove opening to the groove bottom.

[0019] Further, a through hole is arranged in the tenon, the columnar body of the connecting rod is arranged in the through hole and is in interference fit with the inner wall of the through hole.

[0020] Compared with the prior art, the utility model has the beneficial effects as follows:

[0021] 1. The utility model provides a high fastening force shield segment longitudinal quick assembly connecting device, satisfy the use requirement of shield segment and convenient installation, the utility model discloses the connecting device is about the symmetry arrangement of segment ring seam face, is convenient for the pre -buried of connecting device in the production process of segment, and does not need to consider the direction of segment when segment assembly, convenient production and construction, the utility model provides the pull -out force through the mechanical occlusion between connecting rod and wedge block tooth, provides the shear capacity through the tenon and connecting rod, and the diameter of connecting rod and wedge block tooth all is considered according to two grades of ladder (the diameter of connecting rod has a sudden change), can adapt to the initial axis deviation of the connecting device of the last ring segment and the next ring segment in the segment assembly process, thereby make the tolerance ability stronger, the utility model discloses the segment longitudinal slit is in the state of opening and gradually compacting in the process of inserting connecting rod, and then will not cause the deformation and damage of segment longitudinal slit waterproof sealing pad, thereby make the segment assembly complete and will not appear the situation of water leakage.

[0022] 2. The utility model discloses a component adopts steel material, thereby make connecting device mechanical property good, durability is strong, and make segment assembly simple. DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, can also obtain the drawing of other embodiments according to these drawings.

[0024] Figure 1 It is the front view of the utility model;

[0025] Figure 2 It is the plane schematic drawing of connecting rod;

[0026] Figure 3 It is the plane schematic drawing of outer sleeve;

[0027] Figure 4 It is the wedge block structure schematic drawing;

[0028] Figure 5 It is the plane schematic drawing of limiting end cover;

[0029] In the drawing, it is marked as:

[0030] 1-outer sleeve, 2-connecting rod, 3-tenon, 4-wedge block, 5-spring, 6-limiting end cover, 7-combination, 8-groove. DETAILED DESCRIPTION

[0031] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0032] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0033] In the description of the utility model, it needs to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] The utility model provides a kind of high fastening force shield segment longitudinal quick assembly connecting device, including connecting rod 2 and the assembly piece 7 of being assembled to the both ends of connecting rod 2, assembly piece 7 is embedded in segment, including outer sleeve 1 and limiting portion, outer sleeve 1 is set to the periphery of limiting portion;Connecting rod 2 includes the columnar body of middle part and the rod body connected to the both ends of columnar body, and the outer wall of rod body is dentate, and limiting portion is formed tooth engagement, and the outside of the columnar body of connecting rod 2 middle part is provided with tenon 3 for assisting segment assembly;Connecting rod 2 and assembly piece 7 are symmetrically set along segment ring seam face, it is convenient for the embedding of connecting device in segment production process, simultaneously, segment assembly does not need to consider the direction of segment, it is convenient for production and construction.

[0035] The cross-sectional diameter of the rod body of connecting rod 2 away from columnar body is ladder-shaped and gradually decreases, which can allow the initial deviation between the connecting rod and the sleeve axis, so that the rod body is more smoothly inserted into assembly piece 7.

[0036] Outer sleeve 1 is a hollow structure with open ends, including a horizontally arranged cylinder and a circular table connected to one end of the cylinder, the cross-sectional diameter of the circular table away from the cylinder gradually decreases, facilitating better layout of the limiting portion.

[0037] The limiting part includes multiple wedge blocks 4, springs 5 ​​and limiting end covers 6. The limiting end cover 6 is arranged at the end of the cylinder away from the truncated cone. The wedge blocks 4 are arranged inside the truncated cone and engage with the rod body of the connecting rod 2. The spring 5 is located between the wedge blocks 4 and the limiting end cover 6. The elastic force of the spring 5 causes the wedge blocks 4 to retract and tighten.

[0038] There are at least three wedge blocks 4, and the interiors of the wedge blocks 4 are all tooth-shaped and fit with the outer wall of the rod.

[0039] The teeth of the rod body and the teeth of the wedge block 4 are both stepped, which is convenient for adapting to the initial axial center deviation of the connection device between the upper ring of pipe segments and the lower ring of pipe segments during the pipe segment assembly process, thereby making the tolerance capability stronger.

[0040] A protrusion for limiting the connecting rod 2 is provided on the inner side of the outer sleeve 1 at the center of the limiting end cover 6 to facilitate limiting the connecting rod 2 .

[0041] A groove 8 for accommodating the connecting rod 2 and the tenon 3 is reserved between the front end of the assembly 7 and the annular seam surface of the pipe segment.

[0042] The width of the groove 8 gradually decreases from the groove opening to the groove bottom.

[0043] A through hole is provided inside the tenon 3, and the columnar body of the connecting rod 2 is provided in the through hole and has an interference fit with the inner wall of the through hole. The through hole facilitates the tenon 3 to be sleeved on the connecting rod 2, and the interference fit facilitates the fixation of the tenon 3.

[0044] Example:

[0045] like Figure 1 As shown, this embodiment provides a shield segment longitudinal quick assembly connection device with high fastening force, including a connecting rod 2 and an assembly 7 assembled at both ends of the connecting rod 2, the assembly 7 is pre-buried in the segment, and the connecting rod 2 and the assembly 7 are symmetrically arranged along the annular seam surface of the segment. By symmetrically arranging the connecting device, it is convenient to pre-embed the connecting device during the segment production process. At the same time, there is no need to consider the direction of the segment when assembling the segment, which is convenient for production and construction.

[0046] Figure 1 The vertical dotted line in the middle represents the segment annular seam surface.

[0047] Further, such as Figure 2 As shown, the connecting rod 2 includes a central column and rod bodies connected to both ends of the column. The outer wall of the rod is tooth-shaped, forming a tooth-like engagement with the interior of the assembly 7. The cross-sectional diameter of the connecting rod 2 gradually decreases as it moves away from the column.

[0048] Furthermore, the assembly 7 includes an outer sleeve 1 and a limiting portion, and the outer sleeve 1 is arranged on the periphery of the limiting portion.

[0049] like Figure 3As shown, the outer sleeve 1 is a hollow structure with both ends open, including a cylinder and a circular truncated cone connected to one end of the cylinder, and the cross-sectional diameter of the circular truncated cone gradually decreases away from the cylinder.

[0050] The limiting part includes a spring 5, a limiting end cover 6 and three wedge blocks 4. The limiting end cover 6 is fixed to one end of the cylinder away from the circular truncated cone, so that the opening of this end is closed. The limiting end cover 6 is used to insert the connecting rod 2 into a predetermined position. The three wedge blocks 4 are arranged inside the circular truncated cone and engage with the rod body of the connecting rod 2, so as to wrap the rod body. The anti-pulling force is provided by the mechanical engagement between the connecting rod 2 and the teeth of the wedge block 4. The spring 5 is connected between the wedge block 4 and the limiting end cover 6.

[0051] As shown, Figure 4 The inside of the wedge block 4 is in the shape of teeth that fit the outer wall of the rod body.

[0052] The teeth of the rod body and the teeth of the wedge block 4 are both in a stepped shape, so as to adapt to the initial axial deviation of the connecting device of the previous ring pipe piece and the next ring pipe piece in the pipe piece assembly process, and have stronger tolerance capability.

[0053] Further, as shown, Figure 5 The limiting end cover 6 is fixed with a protrusion for limiting the connecting rod 2 in the center of the outer sleeve 1. During the process of inserting the connecting rod 2 into the assembly 7, the three petals of the wedge block 4 gradually open and slide along the inner wall of the outer sleeve 1 to the inside of the pipe piece, while compressing the spring 5. When the rod body of the connecting rod 2 contacts the protrusion of the limiting end cover 6, the assembly is in place. At this time, the three petals of the wedge block 4 retract and tighten again, and the internal teeth engage with the outer wall of the rod body of the connecting rod 2, thereby providing an anti-pulling force to fix the connecting rod 2.

[0054] The protrusion is a cylinder or a cuboid.

[0055] Further, a tenon 3 for assisting pipe piece assembly and improving the shear capacity of the ring gap is arranged outside the columnar body of the connecting rod 2.

[0056] A groove 8 for placing the connecting rod 2 and the tenon 3 is reserved between the end of the circular truncated cone of the outer sleeve 1 away from the cylinder and the surface of the pipe piece ring gap. The groove 8 is located inside the pipe piece, and the width of the groove 8 gradually decreases from the slot opening to the slot bottom.

[0057] A through hole is horizontally arranged inside the tenon 3, and the upper and lower sides of the tenon 3 are pointed. The outer wall of the tenon 3 closely fits the inner wall of the groove 8.

[0058] The tenon 3 is sleeved on the outer wall of the columnar body of the connecting rod 2 through the through hole. The columnar body of the connecting rod 2 and the through hole have an interference fit, so as to fix the tenon 3 in the groove 8. The tenon 3 is used to assist pipe piece assembly and improve the shear capacity between the pipe piece rings.

[0059] The embodiment does not need the pipe segment longitudinal joint to be in a close state during the insertion of the connecting rod 2, and thus does not cause the deformation and damage of the waterproof sealing pad of the pipe segment longitudinal joint, so that the pipe segment assembly is not in a water leakage state after the pipe segment assembly is completed.

[0060] In the embodiment, the outer sleeve 1, the connecting rod 2, the tenon 3, the wedge block 4 and the spring 5 are made of low-carbon alloy steel, and the limiting end cover 6 is made of engineering plastic. The steel material is used to make the connecting device have good mechanical properties and high durability, and to make the pipe segment assembly simple.

[0061] The pipe segment assembly process is as follows:

[0062] During the pipe segment assembly and connection, the connecting rod 2 is inserted into the combined part 7 pre-buried in the pipe segment of the previous ring, and during the insertion process, the three petals of the wedge block 4 are gradually opened and slide to the inside of the pipe segment along the inner wall of the outer sleeve 1, and the spring 5 is compressed, and when the connecting rod 2 contacts the protrusion of the limiting end cover 6, the assembly is in place, at this time, the three petals of the wedge block 4 are retracted and tightened, the internal teeth are engaged with the rod body of the connecting rod 2, so that the connecting rod 2 is fixed, then the tenon 3 is sleeved on the outer wall of the connecting rod 2 columnar body, so that the tenon 3 is fixed in the groove 8, the next ring pipe segment is pushed along the tunnel axis direction by the shield jack, the exposed rod body of the connecting rod 2 fixed on the previous ring pipe segment is inserted into the combined part 7 pre-buried in the next ring pipe segment, and the mechanism during the insertion is the same as that of the connecting rod 2 inserted into the combined part 7 of the previous ring pipe segment, so that the assembly and connection between the pipe segment rings are completed.

[0063] In some embodiments, the type of the pipe segment longitudinal connecting device is not unique, and the combined part 7 pre-buried in the pipe segment can also be pre-buried on one side of the ring joint, and a threaded sleeve or the like is used on the other side, and a thread is arranged at the tail of the connecting rod, and during the pipe segment assembly, the connecting rod is assembled and connected with the pre-buried threaded sleeve, and is inserted into the combined part 7 pre-buried in the next ring pipe segment, so that the assembly between the pipe segment rings is realized. This needs to mark the assembly direction during the pipe segment production.

[0064] The above describes the utility model by using specific examples, which is only used to help understand the utility model, and does not limit the utility model. According to the idea of the utility model, the skilled person in the technical field to which the utility model belongs can make some simple deductions, deformations or substitutions.

Claims

1. A high-tightness shield segment longitudinal quick assembly connecting device, comprising a connecting rod (2) and a combined component (7) assembled at both ends of the connecting rod (2), characterized in that: the combined component (7) is embedded in a segment and comprises a sleeve (1) and a limiting part, the sleeve (1) is arranged at the periphery of the limiting part; the connecting rod (2) comprises a columnar body in the middle and rod bodies connected to both ends of the columnar body, the outer wall of the rod body is in the form of teeth, and the teeth form a tooth engagement with the limiting part, a tenon (3) for assisting segment assembly is arranged on the outer side of the columnar body in the middle of the connecting rod (2); the connecting rod (2) and the combined component (7) are arranged symmetrically along the segment ring joint surface.

2. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 1, characterized in that: the cross-sectional diameter of the rod body of the connecting rod (2) gradually decreases away from the columnar body.

3. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 1, characterized in that: the sleeve (1) is in the form of a hollow structure with openings at both ends, comprising a cylinder arranged horizontally and a circular truncated cone connected to one end of the cylinder, the cross-sectional diameter of the circular truncated cone gradually decreases away from the cylinder.

4. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 3, characterized in that: the limiting part comprises a plurality of wedge blocks (4), springs (5) and limiting end covers (6), the limiting end cover (6) is arranged at one end of the cylinder away from the circular truncated cone, the wedge block (4) is arranged inside the circular truncated cone and engages with the rod body of the connecting rod (2), and the spring (5) is located between the wedge block (4) and the limiting end cover (6).

5. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 4, characterized in that: the wedge block (4) is provided with at least three inside teeth in the form of teeth that match the outer wall of the rod body.

6. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 5, characterized in that: the teeth of the rod body and the teeth of the wedge block (4) are both in the form of steps.

7. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 4, characterized in that: the limiting end cover (6) is provided with a protrusion in the center towards the inside of the sleeve (1) for limiting the connecting rod (2).

8. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 1, characterized in that: a groove (8) for placing the connecting rod (2) and the tenon (3) is reserved between the front end of the combined component (7) and the segment ring joint surface, and the groove (8) is located inside the segment.

9. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 8, characterized in that: the width of the groove (8) gradually decreases from the groove opening to the groove bottom.

10. The high-tightness shield segment longitudinal quick assembly connecting device according to claim 9, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The tenon (3) is internally provided with a through hole, and the columnar body of the connecting rod (2) is arranged in the through hole and is in interference fit with the inner wall of the through hole.

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