A connection structure for steel structure bridge segments and bridge piers

Abstract

The invention discloses a connection structure for a steel structure bridge segment and a bridge pier, belonging to the technical field of steel structure bridges; a connection structure for a steel structure bridge segment and a bridge pier, comprising an outer base connected to the bridge pier, an outer top seat connected to the bridge deck and a connector for connecting the outer base and the outer top seat, the outer base comprising a lower seat body and an intermediate column, the bottom end of the intermediate column is fixedly connected to the lower seat body, and the top end is slidably connected to the outer top seat, the connector comprises a support block, the bottom end of the support block is elastically connected to the lower seat body, and the top end is fixedly connected to the outer top seat; the invention has the advantages of satisfying that a corresponding offset between a bridge segment and a bridge pier is within a safety range, and ensuring that the bridge segment will not fall off the bridge pier when reaching a critical point of the safety range, thereby improving safety.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure bridges, and in particular to a connection structure between a steel structure bridge segment and a bridge pier. Background Art

[0002] Steel structure bridges are bridges that use steel as the main construction material. With the characteristics of high strength and high rigidity, steel structure box girders have the advantages of higher strength, better earthquake resistance, and recyclable materials compared to traditional precast concrete beams. However, compared with precast concrete beams, steel structure box girders are more affected by thermal expansion and contraction effects.

[0003] The pier is the supporting structure of the bridge, usually made of concrete. The piers of the bridge can be divided into many forms, such as cylindrical, rectangular, T-shaped, etc. Their design and layout depend on factors such as the span of the bridge, load requirements and terrain conditions. The main function of the pier is to bear the load of the bridge and transfer the load to the foundation to ensure the stability and safety of the bridge.

[0004] In the prior art, the concrete bridge places the bridge deck on the piers through rubber bearings to eliminate the influence of thermal expansion and contraction of the bridge deck and lateral displacement caused by other external forces. When the steel structure beam and the concrete pier expand and contract or are affected by external forces, the expansion coefficient and deformation coefficient are different, and the coefficient of the steel structure beam is larger. As a result, if the steel box girder bridge deck segment is directly placed on the pier through rubber bearings in the form of a concrete bridge deck segment, the safety of the bridge will be affected and the risk of the bridge deck falling will be significantly increased. For this reason, we propose a connection structure for steel structure bridge segments and piers. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that when steel structure bridge segments are directly connected by rubber bearings, the risk of bridge deck falling is significantly increased, and a connection structure for steel structure bridge segments and bridge piers is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A connection structure for a steel structure bridge segment and a bridge pier, comprising an outer base connected to the bridge pier, an outer top seat connected to the bridge deck, and a connector for connecting the outer base and the outer top seat, wherein the outer base comprises a lower seat body and an intermediate column, wherein the bottom end of the intermediate column is fixedly connected to the lower seat body, and the top end is slidably connected to the outer top seat;

[0008] The connector comprises a support block, the bottom end of the support block is elastically connected to the lower seat body, and the top end of the support block is fixedly connected to the outer top seat.

[0009] Furthermore, a first sink groove is provided on the inner top of the lower seat body, the support block is located on the inner side of the first sink groove, the support block protrudes upward from the first sink groove, a plurality of the support blocks are radially distributed, the middle column is located in the middle of the plurality of the support blocks, the top of the support block is close to the middle column to form a multi-sided pyramid structure, the support blocks and the middle columns are evenly spaced apart from each other, and the outer top seat is inverted on the support block.

[0010] Furthermore, a spiral connecting rod and an inner base are provided at the bottom of the support block, two ends of the spiral connecting rod are respectively connected to the support block and the inner base, and the bottom of the inner base is slidably connected to the first sink.

[0011] Furthermore, a hemispherical convex block is provided in the middle of the bottom of the first sink, and a middle column is provided at the top of the hemispherical convex block;

[0012] A hemispherical groove corresponding to the hemispherical protrusion is formed at the bottom of the inner base, the hemispherical groove is slidably connected to the hemispherical protrusion, a middle through hole is formed at the top of the hemispherical groove, and the middle column passes through the middle through hole.

[0013] Furthermore, the number of spiral turns of the spiral connecting rod is 0.5.

[0014] Furthermore, an inner groove is formed on the outer wall of the hemispherical projection, an outer groove is formed on the inner wall of the hemispherical groove, and a roller is rotatably mounted between the inner groove and the outer groove;

[0015] A first gap is provided between the middle through hole and the middle column;

[0016] A second gap is provided between the inner base and the bottom surface and the side surface of the first sink.

[0017] Furthermore, the spiral connecting rod and the inner base are fixedly connected via a lower connecting rod, and intervals are provided between adjacent support blocks, spiral connecting rods, and lower connecting rods.

[0018] Further, the support block includes an upper support block located at the upper part and a lower support block located at the lower part, the upper support block protrudes upward from the first sink groove, and the bottom of the lower support block is connected to the spiral connecting rod;

[0019] The lower support block is a multi-sided pyramid structure that is larger at the top and smaller at the bottom. The end face of the lower support block away from the middle column is a slope with the top tilted outward. The top of the first sink groove is provided with an inclined support groove corresponding to the lower support block. The top of the first sink groove is a polygon corresponding to the number of support blocks.

[0020] Furthermore, a bolt is swingably provided on the top of the support block, and the outer top seat includes an upper seat body, a second sinking groove corresponding to the multi-prism structure composed of a plurality of support blocks is opened in the middle of the bottom of the upper seat body, and an intermediate pressure top is provided on the top of the second sinking groove for pressing on the middle column and the top of the support block, and a bolt hole corresponding to the bolt is provided on the intermediate pressure top, and the inner diameter of the bolt hole is larger than the outer diameter of the bolt.

[0021] Furthermore, a first flange connected to the bridge pier is provided at the bottom of the lower seat body, and a second flange connected to the bridge deck is provided at the top of the upper seat body.

[0022] Compared with the prior art, the present invention provides a connection structure for steel structure bridge segments and bridge piers, which has the following beneficial effects:

[0023] The present invention discloses a connection structure for a steel structure bridge segment and a bridge pier. When in use, an outer top seat is fixedly installed at a predetermined position of the bridge segment, an outer base is fixedly installed on the bridge pier, and then the bridge segment is hoisted, and the outer top seat and the outer base are connected together through a connector, so that horizontal sliding support is achieved between the bridge segment and the bridge pier through an intermediate column and the outer top seat, and elastic support is achieved between a support block and the outer top seat at the same time. When the lateral displacement of the bridge segment is within a safe range, horizontal sliding is performed, and the elastic support is elastically deformed to adapt to the sliding. When the lateral position reaches a critical point of the safe range, the support block and the intermediate column are rigidly contacted, and a rigid support is formed between the support block and the intermediate column, thereby preventing the lateral displacement from exceeding the safe range.

[0024] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the assembly effect of the outer base and the connector of the present invention;

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure in the central main viewing direction;

[0028] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A;

[0029] Figure 5 For the present invention Figure 3A schematic diagram of the structure of part B in the middle is enlarged;

[0030] Figure 6 It is a three-dimensional schematic diagram of the outer base structure of the present invention;

[0031] Figure 7 It is a three-dimensional schematic diagram of the internal structure of the outer base of the present invention;

[0032] Figure 8 It is a schematic diagram of a three-dimensional upper right perspective of the connector structure of the present invention;

[0033] Fig. 9 It is a schematic diagram of a three-dimensional lower right perspective of the connector structure of the present invention;

[0034] Fig.10 It is a schematic cross-sectional view of the connector structure of the present invention in the main viewing direction;

[0035] Fig.11 It is a schematic diagram of the connecting rod structure of the present invention;

[0036] Fig.12 It is a schematic diagram of the external top seat structure of the present invention from a three-dimensional lower right perspective;

[0037] Fig.13 For the present invention Fig.11 Schematic diagram of the cross-sectional structure in the central main viewing direction.

[0038] In the figure:

[0039] 1. Outer base; 101. Lower base; 102. First sink groove; 103. Hemispherical protrusion; 104. Middle column; 105. First gap; 106. Second gap; 107. Roller; 108. Inclined support groove; 109. Inner groove; 110. First flange; 2. Outer top seat; 201. Upper base; 202. Second sink groove; 203. Middle pressure top; 204. Bolt hole; 205. Second flange; 3. Connector; 301. Support block; 302. Screw connecting rod; 303. Inner base; 304. Bolt; 305. Upper support block; 306. Lower support block; 307. Lower connecting rod; 308. Hemispherical groove; 309. Outer groove; 310. Middle through hole; 311. Ball. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Reference Figure 1-12The present invention discloses a connection structure for a steel structure bridge segment and a pier, comprising an outer base 1 connected to the pier, an outer top base 2 connected to the bridge deck, and a connector 3 for connecting the outer base 1 and the outer top base 2. The outer base 1 comprises a lower base body 101 and an intermediate column 104. The bottom of the lower base body 101 is integrally formed with a first flange 110 connected to the pier. During construction, a third flange corresponding to the first flange 110 is fixedly installed on the top of the pier, and external bolts are installed on the third flange. The first flange 110 and the third flange are fastened together by external bolts to fix the outer base 1 on the pier.

[0042] The bottom end of the middle column 104 is fixedly connected to the lower seat body 101, the outer top seat 2 is placed on the middle column 104, and the top end of the middle column 104 is horizontally slidably connected to the bottom end of the outer top seat 2, so that the outer top seat 2 and the middle column 104 can move relative to each other within a safe range;

[0043] A second flange 205 connected to the bridge deck is provided on the top of the upper seat body 201. When in use, a fourth flange corresponding to the second flange 205 is also installed at a predetermined position at the bottom of the bridge segment. The second flange 205 and the fourth flange are also fastened together by external bolts to fix the outer top seat 2 on the bottom surface of the bridge segment.

[0044] The connector 3 includes a support block 301, the bottom end of the support block 301 is elastically connected to the lower seat body 101, and the top end of the support block 301 is fixedly connected to the outer top seat 2, that is, the outer top seat 2 is supported by the support block 301, and an elastic support is formed for the outer top seat 2, and the elastic support includes a longitudinal elastic support and a transverse elastic support. The longitudinal elastic support enables the support block 301 to bear a part of the longitudinal pressure from the outer top seat 2, and the transverse elastic support is used to withstand the part of the transverse pressure when the outer top seat 2 undergoes transverse displacement, and at the same time, undergo elastic deformation within a safe range to adapt to the lateral displacement of the outer top seat 2 and the bridge segment. When the lateral displacement reaches the critical point of the safety range, the elastic support becomes a rigid support to prevent the outer top seat 2 from further transverse displacement and causing a falling accident, thereby significantly reducing the risk of the bridge segment falling from the outer base 1 and the bridge pier.

[0045] A first groove 102 is processed on the inner top of the lower seat body 101. The first groove 102 is a groove structure with an open top and a closed bottom. The radial outer wall edge of the support block 301 is located on the inner side of the radial side wall edge of the first groove 102, and the longitudinal top edge of the support block 301 is located above the axial top wall of the first groove 102, so that the support block 301 protrudes upward from the first groove 102.

[0046] The plurality of support blocks 301 are radially distributed, and the middle column 104 is located in the middle of the plurality of support blocks 301. Figure 3As shown, the top of the support block 301 is close to the middle column 104, forming a multi-sided pyramid structure that is small on the top and large on the bottom. The support blocks 301 and the middle columns 104 are evenly spaced apart from each other. Specifically, there is a gap between two adjacent support blocks 301 and each support block 301 and the middle column 104, so that the support block 301 has a certain deformation space, and the outer top seat 2 is inverted on the support block 301.

[0047] The multi-sided pyramid structure formed by the support blocks 301 enables the bridge segments and the outer top seat 2 to squeeze the support blocks 301 in the horizontal direction when the bridge segments are inverted on the support blocks 301 through the outer top seat 2, thus providing a certain displacement space.

[0048] A spiral connecting rod 302 and an inner base 303 are fixed to the bottom of the support block 301 . The two ends of the spiral connecting rod 302 are fixedly connected to the support block 301 and the inner base 303 respectively. The bottom of the inner base 303 is slidably connected to the lower seat body 101 .

[0049] The spiral connecting rod 302 here is spiral-shaped and is made of spring steel with good elastic deformation ability. It has lateral and longitudinal elastic deformation ability. When the bridge segment and the outer top seat 2 are pressed on the support block 301, the support block 301 presses the spiral connecting rod 302 downward, so that the spiral connecting rod 302 is compressed. At the same time, the spiral connecting rod 302 presses the inner base 303 downward, and the inner base 303 is slidingly connected to the bottom end surface of the first sinking groove 102 in the lower seat body 101, so that the support block 301 is further increased under the sliding elastic support of the spiral connecting rod 302 and the inner base 303 when it is subjected to lateral pressure from the bridge segment and the outer top seat 2. The amount of deformation is adaptive.

[0050] A hemispherical convex block 103 is integrally formed in the middle of the bottom of the first sink 102. The hemispherical convex block 103 is small at the top and large at the bottom. A middle column 104 is fixedly connected to the top of the hemispherical convex block 103.

[0051] A hemispherical groove 308 corresponding to the hemispherical protrusion 103 is formed at the bottom of the inner base 303. The hemispherical groove 308 is also small at the top and large at the bottom. The hemispherical groove 308 is slidably connected to the hemispherical protrusion 103.

[0052] A middle through hole 310 is processed at the top of the hemispherical groove 308, and the middle through hole 310 passes through the top wall of the hemispherical groove 308 in the vertical direction. The middle column 104 passes through the middle through hole 310, and the middle column 104 extends upward to a height exceeding the first sink 102, and is used to directly form the outer top seat 2, that is, the middle column 104 supports the outer top seat 2 from the middle upward, and the support block 301 supports the outer top seat 2 upward and outward from the periphery of the middle column 104.

[0053] The number of spiral turns of the spiral connecting rod 302 is 0.5N, where N is a positive integer. In this way, the central angle between the top and bottom ends of each spiral connecting rod 302 is 180 degrees, so that the top and bottom ends of the spiral connecting rod 302 are respectively located on both sides of the axis symmetrical about the middle column 104. When the outer top seat 2 applies pressure to the support block 301, the spiral connecting rod 302 can be compressed vertically downward to perform elastic deformation, and can also be compressed horizontally to perform elastic deformation.

[0054] An inner groove 109 is machined on the outer wall of the hemispherical projection 103, and an outer groove 309 is machined on the inner wall of the hemispherical groove 308. The length of the outer groove 309 in the circumferential direction of the hemispherical groove 308 is greater than the length of the inner groove 109 in the circumferential direction of the hemispherical projection 103. A roller 107 is rollingly installed between the inner groove 109 and the outer groove 309.

[0055] A first gap 105 is provided between the middle through hole 310 and the middle column 104. The first gap 105 is annular and surrounds the inner wall of the middle through hole 310 and the outer wall of the middle column 104, so that the inner base 303 can swing around the middle column 104.

[0056] A second gap 106 is provided between the inner base 303 and the bottom and side surfaces of the first groove 102. The second gap is located between the inner base 303 and the bottom and side surfaces of the first groove 102, so that the inner base 303 can swing in the first groove 102 with the center of the hemispherical protrusion 103 as the center under the support of the hemispherical groove 308.

[0057] The spiral connecting rod 302 is fixedly connected to the inner base 303 through the lower connecting rod 307. The lower connecting rod 307 is a vertical connecting rod, so that the spiral connecting rod 302 has a better force transmission effect downward through the lower connecting rod 307. There are gaps between the adjacent support blocks 301, the spiral connecting rod 302, and the lower connecting rod 307, so that when the support block 301 vertically and horizontally squeezes the spiral connecting rod 302, the spiral connecting rod 302 produces elastic deformation in the vertical and horizontal directions. At the same time, the support blocks 301, the spiral connecting rod 302, and the lower connecting rod 307 do not interfere with each other.

[0058] In the present application, the connector 3 mainly has a normal state and a deformed state when subjected to a lateral external force, wherein the support block 301, the spiral connecting rod 302, and the inner base 303 undergo corresponding state changes when receiving a lateral external force.

[0059] Specifically, when the bridge segment and the outer top seat 2 are not pressed on the outer base 1 and the connector 3, the connector 3 is in a natural telescopic state. At this time, the top of the support block 301 is higher than the top of the middle column 104. When the bridge segment is installed on the outer base 1 through the outer top seat 2, the bridge segment presses the support block 301 downward through the outer top seat 2, and the support block 301 presses the spiral connecting rod 302 downward. The spiral connecting rod 302 is elastically deformed downward, and the spiral connecting rod 302 transfers the force downward to the inner base 303. The inner base 303 transfers the force to the lower base body 101 through the hemispherical protrusion 103, thereby forming an elastic support for the outer top seat 2. At this time, the middle of the outer top seat 2 is pressed on the middle column 104, and the position of the outer top seat 2 located around the middle column 104 is elastically supported by the support block 301.

[0060] When the middle column 104 and the support block 301 work together to form support for the outer top seat 2, if the bridge segment is subjected to a lateral external force, or thermal expansion and contraction causes lateral expansion and contraction, horizontal pressure is generated on the support block 301, so that the support block 301 in the force direction moves closer to the middle column 104 under the action of the elastic deformation of the spiral connecting rod 302, so as to cooperate with the lateral displacement of the bridge segment and the outer top seat 2.

[0061] At the same time, compared with the traditional concrete bridge segment placed directly on the rubber bearing, when the lateral movement of the bridge segment and the outer top seat 2 reaches the critical point of the safety range, the end of the support block 301 close to the middle column 104 just touches the middle column, so that in the lateral direction, the elastic support between the support block 301 and the outer top seat 2 is transformed into a rigid support, thereby preventing the bridge segment and the outer top seat 2 from continuing to move laterally and preventing the bridge segment from falling from the pier.

[0062] The support block 301 includes an upper support block 305 located at the top and a lower support block 306 located at the bottom. The upper support block 305 protrudes upward from the first trough 102, and the bottom of the lower support block 306 is connected to the spiral connecting rod 302. The upper support block 305 is mainly used to contact with the outer top seat 2 and the middle column 104 to form support, while the lower support block 306 is mainly used to contact with the side wall of the first trough 102 to form support.

[0063] The upper support block 305 is a multi-sided pyramid structure that is small at the top and large at the bottom, and the lower support block 306 is a multi-sided pyramid structure that is large at the top and small at the bottom. In the present application, the upper support block 305 and the lower support block 306 are four-sided prism structures, and the end face of the lower support block 306 away from the middle column 104 is a slope with the top inclined outward. The top of the first sink 102 is provided with a sloped support groove 108 corresponding to the lower support block 306. When the connector 3 is in a natural telescopic state, the slope is separated from the sloped support groove 108. When the bridge segment and the outer top seat 2 are pressed on the support block 301, the upper support block 305 descends, and the lower support block 306 contacts with the sloped support groove 108, and there is a sliding contact between the two.

[0064] The top of the first sink 102 is a polygon corresponding to the number of support blocks 301. Figure 6 For example, the number of the support blocks 301 is 12, the top of the first sink 102 is a regular dodecagon, and the bottom of the first sink 102 is a circle.

[0065] The functions of the inclined support groove 108 are, first, to prevent multiple support blocks 301 from rotating in the first groove 102; second, when the outer top seat 2 continues to press the support block 301 downward, the support block 301 slides downward and toward the direction close to the middle column 104 under the guidance of the inclined support groove 108, and will not deform toward the outside of the first groove 102, so that the downward force can be better transmitted to the inner base 303 through the spiral connecting rod 302 and the lower connecting rod 307.

[0066] The top of the support block 301 is swingably installed with a bolt 304, and the bolt 304 is installed vertically upward. Specifically, the bottom of the bolt 304 is fixedly connected with a ball 311, and the top of the upper support block 305 is processed with a ball groove for installing the ball 311. The top opening of the ball groove is smaller than the maximum outer diameter of the ball 311, and larger than the outer diameter of the bolt 304, so that the bolt 304 cooperates with the ball groove through the ball 311, and can perform deflection, swing and other actions at a certain angle in the upper support block 305.

[0067] The outer top seat 2 includes an upper seat body 201, and a second groove 202 corresponding to the multi-sided pyramid structure composed of multiple support blocks 301 is opened in the middle of the bottom of the upper seat body 201. The second groove is a groove structure opening downward, and the second groove 202 is a multi-sided pyramid structure. In this application, taking a twelve-sided pyramid as an example, the side of the second groove 202 is twelve faces, the bottom side of the second groove 202 is a regular dodecagon, and each side wall surface of the second groove 202 corresponds to the outer wall surface of the upper support block 305 on the support block 301.

[0068] The top of the second sink 202 is processed with an intermediate pressure top 203 that presses on the top of the intermediate column 104 and the support block 301. The intermediate pressure top 203 is processed with a bolt hole 204 corresponding to the bolt 304. When in use, the bolt 304 is passed through the bolt hole 204 to press the intermediate pressure top 203 on the intermediate column 104 and the support block 301. An anti-detachment connection is formed between the outer top seat 2 and the support block 301 through the bolt 304.

[0069] The inner diameter of the bolt hole 204 is larger than the outer diameter of the bolt 304. When the bridge segment and the outer top seat 2 are laterally displaced relative to the outer base 1, Figure 3 Taking the middle perspective as an example, when the outer top seat 2 deviates from left to right and squeezes the support block 301, the side wall surface of the second sink 202 squeezes the upper support block 305 on the left side, so that the upper support block 305 on the left side moves rightward and downward at the same time, and the upper support block 305 on the left side squeezes the spiral connecting rod 302 downward and rightward, and the spiral connecting rod 302 squeezes the inner base 303 downward and rightward. Since the bottom end of the spiral connecting rod 302 is located at the right end of the inner base 303, the spiral connecting rod 302 transmits pressure downward from the right end of the inner base 303 through the lower connecting rod 307 located at the right end to The right end of the inner base 303 causes the right end of the inner base 303 to deviate to the left and downward, and the inner base 303 is in sliding contact with the hemispherical protrusion 103, so that the left end of the inner base 303 deviates upward and to the left, further pushing up the lower connecting rod 307 on the left side, and pushing up the corresponding spiral connecting rod 302 through the lower connecting rod 307 on the left side. Since the top end of the spiral connecting rod 302 corresponding to the lower connecting rod 307 on the left side is located on the right side of the middle column 104, the support block 301 on the right side is pushed up (similar to a seesaw structure), thereby increasing the friction between the support block 301 and the middle pressure top 203;

[0070] When the support block 301 on the left side shifts to the right and downward to abut against the middle column 104, the offset of the bridge segment and the outer top seat 2 also reaches the safety critical point. At this time, a rigid contact is formed between the support block 301 on the left side and the middle column 104, and a rigid support is formed between the side wall of the second sink 202 of the outer top seat 2. At the same time, the friction force between the top surface of the support block 301 on the right side and the middle pressure top 203 also reaches the maximum, and the deflection and swing angle of the bolts 304 on the support blocks 301 on both sides in the bolt holes 204 also reaches the maximum, which work together to prevent the bridge segment from continuing to shift and prevent the bridge segment from falling from the pier.

[0071] Working principle: During construction, a third flange corresponding to the first flange 110 is fixedly installed on the top of the pier, external bolts are installed on the third flange, the first flange 110 and the third flange are fastened together by external bolts, and the outer base 1 is fixedly installed on the pier;

[0072] A fourth flange corresponding to the second flange 205 is also installed at a predetermined position at the bottom of the bridge segment. The second flange 205 and the fourth flange are also fastened together by external bolts to fix the outer top seat 2 on the bottom surface of the bridge segment. The middle of the fourth flange is a hollow structure, through which the nut is screwed onto the bolt 304. It should be noted that when the nut is screwed onto the bolt 304, it is not screwed to contact with the top of the outer top seat 2, but is screwed to keep a certain distance from the top of the outer top seat 2, so that when the bolt 304 deflects and may deflect to the limit, there is corresponding space for movement, and the bolt 304 is prevented from being broken during deflection due to the excessive distance between the nut and the outer top seat 2.

[0073] When the bridge segment is installed on the outer base 1 through the outer top seat 2, the bridge segment presses the support block 301 downward through the outer top seat 2, and the support block 301 presses the spiral connecting rod 302 downward. The spiral connecting rod 302 is elastically deformed downward, and the spiral connecting rod 302 transfers the force downward to the inner base 303. The inner base 303 transfers the force to the lower base body 101 through the hemispherical protrusion 103, thereby forming an elastic support for the outer top seat 2. At this time, the middle of the outer top seat 2 is pressed on the middle column 104, and the position of the outer top seat 2 located around the middle column 104 forms an elastic support through the support block 301.

[0074] When the middle column 104 and the support block 301 work together to form support for the outer top seat 2, if the bridge segment is subjected to a lateral external force, or thermal expansion and contraction causes lateral expansion and contraction, horizontal pressure is generated on the support block 301, so that the support block 301 in the force direction moves closer to the middle column 104 under the action of the elastic deformation of the spiral connecting rod 302, so as to cooperate with the lateral displacement of the bridge segment and the outer top seat 2.

[0075] When the lateral movement of the bridge segment and the outer top seat 2 reaches the critical point of the safety range, the end of the support block 301 close to the middle column 104 just touches the middle column, so that in the lateral direction, the elastic support between the support block 301 and the outer top seat 2 is transformed into a rigid support, thereby preventing the bridge segment and the outer top seat 2 from continuing to move laterally and preventing the bridge segment from falling from the pier.

[0076] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A connection structure for a steel structure bridge segment and a bridge pier, comprising an outer base (1) connected to the bridge pier, an outer top seat (2) connected to the bridge deck, and a connector (3) for connecting the outer base (1) and the outer top seat (2), characterized in that: The outer base (1) comprises a lower base body (101) and an intermediate column (104); the bottom end of the intermediate column (104) is fixedly connected to the lower base body (101), and the top end is horizontally slidably connected to the outer top base (2); The connector (3) comprises a support block (301), wherein the bottom end of the support block (301) is elastically connected to the lower seat body (101), and the top end of the support block (301) is fixedly connected to the outer top seat (2); The inner top of the lower seat body (101) is provided with a first sink groove (102), the support block (301) is located inside the first sink groove (102), the support block (301) protrudes upward from the first sink groove (102), a plurality of the support blocks (301) are radially distributed, the middle column (104) is located in the middle of the plurality of support blocks (301), the top of the support block (301) is close to the middle column (104), forming a multi-sided pyramid structure, the support blocks (301) and the middle column (104) are evenly spaced apart from each other, and the outer top seat (2) is inverted on the support block (301); The bottom of the support block (301) is provided with a spiral connecting rod (302) and an inner base (303), the two ends of the spiral connecting rod (302) are respectively connected to the support block (301) and the inner base (303), and the bottom of the inner base (303) is slidably connected to the first sink (102); A hemispherical convex block (103) is arranged in the middle of the bottom of the first sink (102), and an intermediate column (104) is arranged at the top of the hemispherical convex block (103); A hemispherical groove (308) corresponding to the hemispherical protrusion (103) is provided at the bottom of the inner base (303), the hemispherical groove (308) and the hemispherical protrusion (103) are slidably connected, and a middle through hole (310) is provided at the top of the hemispherical groove (308), and the middle column (104) passes through the middle through hole (310).

2. A connection structure for a steel structure bridge segment and a bridge pier according to claim 1, characterized in that: The number of spiral turns of the spiral connecting rod (302) is 0.

5.

3. The connection structure for a steel structure bridge segment and a bridge pier according to claim 2, characterized in that: An inner groove (109) is formed on the outer wall of the hemispherical projection (103), an outer groove (309) is formed on the inner wall of the hemispherical recess (308), and a roller (107) is rotatably mounted between the inner groove (109) and the outer groove (309); A first gap (105) is provided between the middle through hole (310) and the middle column (104); A second gap (106) is provided between the inner base (303) and the bottom surface and side surface of the first sink (102).

4. The connection structure for a steel structure bridge segment and a bridge pier according to claim 3, characterized in that: The spiral connecting rod (302) and the inner base (303) are fixedly connected via a lower connecting rod (307), and intervals are provided between adjacent support blocks (301), spiral connecting rods (302), and lower connecting rods (307).

5. The connection structure between a steel structure bridge segment and a bridge pier according to claim 4, characterized in that: The support block (301) comprises an upper support block (305) located at the top and a lower support block (306) located at the bottom, the upper support block (305) protruding upward from the first sink (102), and the bottom of the lower support block (306) is connected to the spiral connecting rod (302); The lower support block (306) is a multi-sided pyramid structure that is larger at the top and smaller at the bottom. The end surface of the lower support block (306) away from the middle column (104) is a slope with the top tilted outward. The top of the first trough (102) is provided with a slope support groove (108) corresponding to the lower support block (306). The top of the first trough (102) is a polygon corresponding to the number of support blocks (301).

6. The connection structure for a steel structure bridge segment and a bridge pier according to claim 4, characterized in that: The top of the support block (301) is swingably provided with a bolt (304), the outer top seat (2) comprises an upper seat body (201), a second sinking groove (202) corresponding to the multi-sided pyramid structure composed of a plurality of support blocks (301) is provided in the middle of the bottom of the upper seat body (201), the top of the second sinking groove (202) is provided with an intermediate pressing top (203) pressed on the top of the intermediate column (104) and the support block (301), the intermediate pressing top (203) is provided with a bolt hole (204) corresponding to the bolt (304), and the inner diameter of the bolt hole (204) is greater than the outer diameter of the bolt (304).

7. The connection structure for a steel structure bridge segment and a bridge pier according to claim 6, characterized in that: The bottom of the lower seat body (101) is provided with a first flange (110) connected to the bridge pier, and the top of the upper seat body (201) is provided with a second flange (205) connected to the bridge deck.

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