Segmental prefabricated assembled anti-collision pier with external wave-shaped anti-collision device and construction method

Abstract

The invention discloses a segmental prefabricated assembly anti-collision pier with an external wave-shaped anti-collision device and a construction method. The anti-collision pier comprises a first segmental pier and a second segmental pier connected with the first segmental pier, and the outer side of the first segmental pier is sleeved with the wave-shaped anti-collision device; the wave-shaped anti-collision device comprises a wave-shaped anti-collision device inner wall, a wave-shaped anti-collision device outer wall and a plurality of wave-shaped unit bodies arranged between the wave-shaped anti-collision device inner wall and the wave-shaped anti-collision device outer wall. Each waveform unit body comprises a waveform unit body inner wall, a waveform unit body outer wall and a plurality of waveform unit body supporting walls connected between the waveform unit body inner wall and the waveform unit body outer wall, and each waveform unit body supporting wall comprises a plurality of waveform structure plates arranged in pairs. According to the anti-collision pier, the anti-impact performance is effectively improved, accurate machining and rapid construction are achieved, the design concept of recoverable functions is introduced, it is ensured that the anti-collision pier can rapidly recover the functions after being impacted, and therefore the safety and reliability of a bridge are improved.

Description

Technical Field

[0001] The invention relates to a segment prefabricated assembled crash pier of an external corrugated crash pier device and a construction method thereof, belonging to the technical field of crash piers. Background Art

[0002] In the field of transportation infrastructure construction, the safety performance of bridges is the basic guarantee. With the increase in ship transportation volume, the risk of waterway bridges being hit will increase accordingly. The design of traditional bridge piers usually has problems such as long free length, large aspect ratio, and weak impact resistance, which makes the piers easily damaged or even collapsed when hit by ships, thus seriously affecting the stability and traffic safety of the bridge. After the accident, the damage identification and repair and reinforcement of the bridge not only requires a lot of time and money, but also affects the normal operation of the bridge.

[0003] As a key structure to protect bridges from collisions with ships or vehicles, crash piers are usually installed near the main piers. The existing design and construction methods of crash piers mostly use pier structures of reinforced concrete cast on site. This method requires on-site tying of steel bars and construction of formwork. If the construction site is in the water, a cofferdam must also be set up, which not only requires a lot of manpower and material resources, but also has low efficiency, long cycle, harsh environment, and will generate a lot of dust pollution. In addition, the existing prefabricated segmental piers are insufficient in terms of stiffness, energy consumption capacity, and impact resistance.

[0004] In order to improve the safety and durability of bridges, multi-layer energy dissipation and toughness design have become important directions for the development of bridge anti-collision technology. Multi-layer energy dissipation design sets up multiple energy dissipation layers in the structure, so that when it is hit, the energy can be absorbed and dissipated layer by layer, thereby protecting the main structure from damage. Toughness design emphasizes the ability of the structure to recover after an impact. Even after local damage, the structure can still maintain its basic functions and quickly restore traffic. At present, prefabricated assembly technology has been widely used in bridge construction. This technology can be quickly paved, reduce concrete transportation and on-site pouring, effectively reduce environmental pollution and noise, and improve construction adaptability. Despite this, the field of anti-collision piers still mainly uses cast-in-place concrete technology, and the performance of existing prefabricated segmental piers still needs to be improved.

[0005] In summary, there is an urgent need for a high-efficiency, high-quality, impact-resistant anti-collision pier and construction method to solve the problems existing in the above-mentioned prior art and improve the safety performance and durability of the bridge. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a segmented prefabricated assembly crash pier with an external corrugated crash prevention device and a construction method. The crash pier utilizes a corrugated crash prevention device and an arched energy-absorbing connecting ring to effectively improve the impact resistance; through the segment prefabrication technology, precise processing and rapid construction are achieved; in addition, the crash pier introduces a design concept of recoverable function, ensuring that its function can be quickly restored after being impacted, thereby improving the safety and reliability of the bridge.

[0007] In the first aspect, the present invention provides a segmented prefabricated assembled anti-collision pier with an external corrugated anti-collision device, comprising a first segmented pier and a second segmented pier connected to the first segmented pier, wherein the outer side of the first segmented pier is sleeved with a corrugated anti-collision device; the corrugated anti-collision device comprises an inner wall of the corrugated anti-collision device, an outer wall of the corrugated anti-collision device sleeved outside the inner wall of the corrugated anti-collision device, and a plurality of corrugated unit bodies arranged between the inner wall of the corrugated anti-collision device and the outer wall of the corrugated anti-collision device, wherein the inner wall of the corrugated anti-collision device is sleeved on the outer periphery of the first segmented pier; the corrugated unit body comprises an inner wall of the corrugated unit body, an outer wall of the corrugated unit body sleeved outside the inner wall of the corrugated unit body, and a plurality of corrugated unit body supporting walls connected between the inner wall of the corrugated unit body and the outer wall of the corrugated unit body, wherein the corrugated unit body supporting walls comprise a plurality of corrugated structural plates arranged in pairs, wherein two of each pair of corrugated structural plates are symmetrically arranged and intersect in the middle, and the two ends of each pair of corrugated structural plates are respectively connected to the inner wall of the corrugated unit body and the outer wall of the corrugated unit body.

[0008] In one embodiment of the present invention, an arched energy-absorbing connecting ring is arranged on the outer periphery of the connection between the first segment pier and the second segment pier, the arched energy-absorbing connecting ring is annular as a whole, and its cross-section is arched, and a plurality of diamond-shaped hollows are arranged on the arched part in the middle of the arched energy-absorbing connecting ring; the arched energy-absorbing connecting ring is divided into two leaves, which are connected by a second bolt and hinged around the connection between the first segment pier and the second segment pier, and the upper and lower ends of the arched energy-absorbing connecting ring are fixedly connected to the first segment pier and the second segment pier respectively by the first bolt.

[0009] In one embodiment of the present invention, the corrugated anti-collision device is an annular structure, the corrugated unit body is cylindrical as a whole, and the axis of each corrugated unit body, the axis of the outer wall of the corrugated anti-collision device, and the axis of the inner wall of the corrugated anti-collision device are parallel.

[0010] In one embodiment of the present invention, the first segment pier and the second segment pier are both cylindrical, the first segment pier is connected to the top of the second segment pier, the first segment pier is wrapped with a first steel pipe on the outside, a protrusion with a smaller cross-section is provided at the bottom, and two first reserved through holes are provided inside; wherein the inner wall of the corrugated anti-collision device is sleeved on the outer periphery of the first steel pipe of the first segment pier.

[0011] In one embodiment of the present invention, a second steel pipe is wrapped around the outer side of the second segment pier, and a recessed portion is arranged on the top, the recessed portion is butted against the protruding portion, the cross-sectional area of ​​the recessed portion is larger than the cross-sectional area of ​​the protruding portion, and the depth of the recessed portion is smaller than the length of the protruding portion, so that a segment joint is formed between the first segment pier and the second segment pier, and high-strength concrete is poured in the segment joint; a U-shaped through hole is arranged inside the second segment pier, the upper end of the U-shaped through hole is connected with the recessed portion, and the U-shaped through hole is butted against two first reserved through holes in the first segment pier; it also includes a flexible steel strand, the flexible steel strand passes through one of the first reserved through holes of the first segment pier, passes through the U-shaped through hole of the second segment pier, and comes out from the other first reserved through hole of the first segment pier, a conical clamp sleeved on the flexible steel strand is installed at the top position of the first reserved through hole of the first segment pier, and a tensioning device is arranged on the conical clamp, and the tensioning device is used to prestress the flexible steel strand.

[0012] In one embodiment of the present invention, the bottom of the second segment pier is fixedly connected to a bottom steel plate, the bottom steel plate is fixedly connected to the second steel pipe, a plurality of wing-shaped support plates are arranged on the periphery of the bottom steel plate, the plurality of wing-shaped support plates are fixedly connected between the bottom steel plate and the second steel pipe; the bottom steel plate is provided with a plurality of second reserved through holes; the bottom of the bottom steel plate is fixedly connected to a shear column, and the bottom of the shear column is fixedly connected to a shear bottom plate.

[0013] In one embodiment of the present invention, a pile foundation is arranged below the second segment pier, and a plurality of threaded steel bars are arranged in the pile foundation, and the plurality of threaded steel bars are connected one by one with the plurality of second reserved through holes, and the plurality of threaded steel bars pass through the plurality of second reserved through holes respectively; a reserved groove is arranged on the top of the pile foundation, and the shape of the reserved groove is adapted to the shear column and the shear bottom plate, and the reserved groove is connected with the shear column and the shear bottom plate; a correcting bolt is arranged on the pile foundation, and the correcting bolt is sleeved on the threaded steel bars extending out of the pile foundation, and the bottom steel plate of the second segment pier is located on the correcting bolt, and a bottom splicing seam is formed between the bottom steel plate and the pile foundation, and high-strength concrete is poured in the bottom splicing seam; and multiple layers of bolts are fastened to the threaded steel bars passing through the top of the bottom steel plate.

[0014] In one embodiment of the present invention, a limiting ring is further sleeved on the outer side of the first segment pier, and the limiting ring abuts against the bottom of the corrugated anti-collision device; the limiting ring is annular as a whole, and is provided with a plurality of third reserved through holes along the circumferential direction, and a third bolt is provided in the third reserved through hole, and the limiting ring is fixedly connected to the first segment pier through the third bolt.

[0015] In one embodiment of the present invention, the size of the arched energy dissipation connecting ring is determined by the following formula:

[0016]

[0017] Where: ρ is the thickness-to-height ratio of the arch structure, Wherein a is the thickness of the arched energy dissipation connecting ring, and h is the maximum cross-sectional circumference of the arched energy dissipation connecting ring;

[0018] μ is Poisson’s ratio;

[0019] β is the aspect ratio of the arch structure, Where b is the length of the arched part;

[0020] E is the elastic modulus;

[0021] τ cr，l is the critical buckling shear stress of the steel plate.

[0022] In a second aspect, the present invention provides a construction method for a segment prefabricated assembly crash pier of an external corrugated crash pier device, using the segment prefabricated assembly crash pier of the external corrugated crash pier device, the construction method comprising:

[0023] Step 1: prefabricate the corrugated anti-collision device; prefabricate the outer wall of the corrugated anti-collision device, the inner wall of the corrugated anti-collision device and the corrugated unit body according to the size of the anti-collision pier, and fix the corrugated unit body between the outer wall of the corrugated anti-collision device and the inner wall of the corrugated anti-collision device by welding;

[0024] Step 2: prefabricate the first segment pier and the second segment pier of the crash pier in blocks; after tying the steel cage, use the first steel pipe and the second steel pipe as templates, bury the corrugated pipe and cast it, and leave the first reserved through hole and the reserved U-shaped through hole;

[0025] Step 3: Sleeve the deviation correction bolts on the threaded steel bars extending from the pile foundation; hoist the second segment pier above the pile foundation, align the shear column at the bottom of the second segment pier with the reserved groove in the pile foundation, and align the second reserved through hole with the threaded steel bars extending from the pile foundation; lower the second segment pier after the two sides are aligned; after the second segment pier is lowered, adjust the screwing amount of the deviation correction bolts so that the second segment pier remains vertical as a whole to correct the construction deviation; after the deviation is corrected, use multi-layer bolts to screw into the threaded steel bars passing through the bottom steel plate, and pour high-strength concrete on the bottom joint between the bottom steel plate and the pile foundation, and now the second segment pier is installed;

[0026] Step 4: hoist the first segment pier so that the protrusion is embedded in the recess; since the length of the protrusion is greater than the depth of the recess, and the cross-sectional area of ​​the recess is greater than the cross-sectional area of ​​the protrusion, a segment joint is formed between the first segment pier and the second segment pier; appropriately rotate the first segment pier so that its first reserved through hole corresponds to the U-shaped through hole of the second segment pier;

[0027] Step 5: Pass the flexible steel strand through one of the first reserved through holes of the first segment pier, through the U-shaped through hole of the second segment pier, and out of the other first reserved through hole of the first segment pier; after slight adjustment, install a conical clamp at the top of the first reserved through hole of the first segment pier, and use a through-type jack to prestress the flexible steel strand, so that the first segment pier and the second segment pier fit tightly; then cut off the excessively long flexible steel strand;

[0028] Step 6: Concrete grouting is performed on the segment joint between the first segment pier and the second segment pier, and the top position of the first reserved through hole of the first segment pier;

[0029] Step 7: Hinging the two leaves of the arched energy-absorbing connecting ring at the connection between the first segment pier and the second segment pier, and fixing the hinges with the second bolts; at the same time, fixing the arched energy-absorbing connecting ring as a whole to the first steel pipe of the first segment pier and the second steel pipe of the second segment pier with the first bolts;

[0030] Step 8: Use a third bolt to pass through the third reserved through hole to fix the limit ring on the first steel pipe of the first segment pier according to the designed position;

[0031] Step 9: Heat the corrugated anti-collision device in water insulation to slightly expand its volume, then quickly hoist it and put it on the first segment pier, and use the limit ring to limit the corrugated anti-collision device from sliding down; after the corrugated anti-collision device cools down, it is tightly fixed on the outer wall of the first segment pier;

[0032] Step 10: Withdraw the relevant equipment and wait for the grouting material to reach the set strength, and the construction of the crash pier is completed.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1. The present invention enhances the impact resistance: The present invention develops a new type of corrugated anti-collision device, which incorporates corrugated structural plate elements while retaining the original design of the circular pier. This improvement not only greatly improves the energy absorption capacity of the structure, but also ensures sufficient structural rigidity, thereby effectively improving the overall impact resistance.

[0035] 2. The present invention introduces a recoverable function: the present invention adopts flexible steel strands to pull prestress between two segmental piers, and arranges an arched energy-absorbing connecting ring, so that the pier can consume energy through certain offset deformation and damage to the arched energy-absorbing connecting ring when subjected to a strong impact, and then be pulled back to its original position by the steel strands. At this time, only the arched energy-absorbing connecting ring needs to be replaced, and the entire anti-collision system can quickly resume working condition.

[0036] 3. The present invention improves construction efficiency: The present invention adopts the form of prefabricated segment assembly, so that the various prefabricated components can be assembled quickly and efficiently during the construction of the crash pier, thereby reducing the cumbersome steps and time of the traditional construction method and improving the construction efficiency.

[0037] 4. The present invention improves the construction quality: The prefabricated segmented crash pier provided by the present invention uses prefabricated components, which are standardized in the factory to ensure their quality and precision, thereby improving the construction quality. In addition, the use of prefabricated components can also reduce human errors at the construction site to a certain extent, further ensuring the construction quality.

[0038] 5. The present invention reduces the generation of construction waste: due to the use of prefabricated components, the processing and production of components are more centralized, which can reduce the generation of waste at the construction site and reduce the impact on the environment.

[0039] In summary, the present invention provides a segmented prefabricated assembly crash pier and construction method with an external corrugated crash prevention device, which improves the impact resistance of the crash pier, introduces a recoverable function, improves construction efficiency and quality, and reduces the generation of construction waste; the crash pier utilizes a corrugated crash prevention device and an arched energy-absorbing connecting ring to effectively improve the impact resistance; through the segmented prefabrication technology, precise processing and rapid construction are achieved; in addition, the crash pier introduces the design concept of a recoverable function to ensure that its function can be quickly restored after an impact, thereby improving the safety and reliability of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic structural diagram of a segmented prefabricated assembled crash pier of an external corrugated crash protection device provided by the present invention.

[0041] Figure 2 A three-dimensional diagram of the corrugated unit body provided by the present invention.

[0042] Figure 3 This is a top view of the corrugated unit body provided by the present invention.

[0043] Figure 4 for Figure 3 Enlarged view of a.

[0044] Figure 5A three-dimensional diagram of the corrugated anti-collision device provided by the present invention.

[0045] Figure 6 This is a schematic diagram of the segmental pier docking provided by the present invention.

[0046] Figure 7 A top view of the second segment pier provided by the present invention.

[0047] Figure 8 A top view of the limiting ring provided by the present invention.

[0048] Fig. 9 A front view of the arched energy dissipation connecting ring provided by the present invention.

[0049] Fig.10 A top view of the arched energy dissipation connecting ring provided by the present invention.

[0050] Figure: 1, corrugated anti-collision device; 101, corrugated unit body inner wall; 102, corrugated unit body support wall; 103, corrugated unit body outer wall; 2, corrugated anti-collision device outer wall; 3, corrugated anti-collision device inner wall; 4, first segment pier; 401, first steel pipe; 402, protrusion; 403, first reserved through hole; 5, second segment pier; 501, second steel pipe; 502, recessed part; 503, U-shaped through hole; 504, wing-shaped support plate; 505, second reserved through hole; 506, bottom steel Plate; 507, shear column; 508, shear bottom plate; 6, arched energy dissipation connecting ring; 601, diamond hollow; 602, first bolt; 603, second bolt; 7, segment joint; 8, flexible steel strand; 801, conical clamp; 802, through-type jack; 9, pile foundation; 901, threaded steel bar; 902, reserved groove; 10, bottom joint; 11, deviation correction bolt; 12, multi-layer bolt; 13, limit ring; 1301, third bolt; 1302, third reserved through hole. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] like Figure 1-10 As shown, the present invention provides a segmented prefabricated assembled crash pier with an external corrugated crash prevention device, including a first segmented pier 4, and a second segmented pier 5 connected to the first segmented pier 4, an arched energy-absorbing connecting ring 6 is arranged on the outer periphery of the connection between the first segmented pier 4 and the second segmented pier 5, and a corrugated crash prevention device 1 is sleeved on the outer side of the first segmented pier 4.

[0055] In some embodiments, the corrugated anti-collision device 1 is an annular structure, including a corrugated anti-collision device inner wall 3, a corrugated anti-collision device outer wall 2 sleeved outside the corrugated anti-collision device inner wall 3, and a plurality of corrugated unit bodies arranged between the corrugated anti-collision device inner wall 3 and the corrugated anti-collision device outer wall 2, the corrugated anti-collision device inner wall 3 sleeved on the outer periphery of the first segment pier 4; the corrugated unit body is cylindrical as a whole, including a corrugated unit body inner wall 101, a corrugated unit body outer wall 103 sleeved outside the corrugated unit body inner wall 101, and a plurality of corrugated unit body support walls 102 connected between the corrugated unit body inner wall 101 and the corrugated unit body outer wall 103, the corrugated unit body support wall 102 includes a plurality of corrugated structural plates arranged in pairs, two of each pair of corrugated structural plates are symmetrically arranged and intersected in the middle, and the two ends of each pair of corrugated structural plates are respectively connected to the corrugated unit body inner wall 101 and the corrugated unit body outer wall 103; that is, the corrugated unit body support wall 102 is a sinusoidal waveform that intercepts two wave peaks.

[0056] In this embodiment, 8 corrugated unit bodies are arranged between the inner wall 3 of the corrugated anti-collision device and the outer wall 2 of the corrugated anti-collision device, and 12 pairs of corrugated structural plates are arranged between the inner wall 101 of the corrugated unit body and the outer wall 103 of the corrugated unit body, for a total of 24 corrugated structural plates.

[0057] Optionally, the corrugated unit body inner wall 101 and the corrugated unit body outer wall 103 are steel structures to improve strength; the corrugated unit body inner wall 101, the corrugated unit body outer wall 103 and the corrugated unit body support wall 102 between the two walls are all prefabricated in the factory; the axis of each corrugated unit body, the axis of the corrugated anti-collision device outer wall 2, and the axis of the corrugated anti-collision device inner wall 3 are parallel; the corrugated unit body can be welded between the corrugated anti-collision device inner wall 3 and the corrugated anti-collision device outer wall 2, and the corrugated anti-collision device inner wall 3 and the corrugated anti-collision device outer wall 2 are both annular structures.

[0058] Optionally, the material of the corrugated anti-collision device 1 is Q345 steel; Q345 steel can effectively absorb a large amount of energy due to its excellent dynamic load and impact load bearing capacity, so it is suitable as a manufacturing material for the corrugated anti-collision device 1; other steels with excellent impact resistance and energy absorption capacity can also be selected, such as Q390 steel, Q420 steel and SM490B steel plate, etc., to meet different application requirements and performance standards.

[0059] Preferably, the corrugated unit body support wall 102 is a sinusoidal waveform that intercepts two wave peaks. Due to the superior energy absorption capacity of the sinusoidal wave, the corrugated unit body support wall 102 is set to a waveform, specifically a sinusoidal wave that intercepts two wave peaks; the thickness of the corrugated unit support wall 102 is designed to be 3mm, and the thickness of the corrugated unit body inner wall 101 and the corrugated unit body outer wall 103 is 5mm; the annular diameter of the corrugated unit body is designed to be 125mm; the corrugated anti-collision device inner wall 3 and the corrugated anti-collision device outer wall 2 are determined as a whole according to the diameter of the anti-collision pier.

[0060] In some embodiments, a limiting ring 13 is further sleeved on the outer side of the first segment pier 4, and the limiting ring 13 abuts against the bottom of the corrugated anti-collision device 1; the limiting ring 13 is annular as a whole, and is provided with a plurality of third reserved through holes 1302 along the circumference, and a third bolt 1301 is provided in the third reserved through hole 1302, and the limiting ring 13 is fixedly connected to the first segment pier 4 through the third bolt 1301. The limiting ring 13 is used to limit the corrugated anti-collision device 1 from sliding down.

[0061] Optionally, the first segment pier 4 and the second segment pier 5 are both cylindrical, and the first segment pier 4 is connected to the top of the second segment pier 5; a docking interface is provided on the opposite side of the first segment pier 4 and the second segment pier 5, and a reserved through hole is provided for prestressing.

[0062] In some embodiments, the first segment pier 4 is wrapped with a first steel pipe 401 on the outside, a protrusion 402 with a smaller cross-section is provided at the bottom, and two first reserved through holes 403 are provided inside; wherein, the inner wall 3 of the corrugated anti-collision device is sleeved on the outer periphery of the first steel pipe 401 of the first segment pier 4.

[0063] In some embodiments, the second segment pier 5 is provided with a second steel pipe 501 on the outside, and a recessed portion 502 is provided on the top, the recessed portion 502 is connected to the protruding portion 402, the cross-sectional area of ​​the recessed portion 502 is larger than the cross-sectional area of ​​the protruding portion 402, and the depth of the recessed portion 502 is smaller than the length of the protruding portion 402, so that a segment joint 7 is formed between the first segment pier 4 and the second segment pier 5, and high-strength concrete is poured in the segment joint 7; a U-shaped through hole 503 is provided inside the second segment pier 5, the upper end of the U-shaped through hole 503 is connected to the recessed portion 502, and the U-shaped through hole 503 is connected to the protruding portion 402. The hole 503 is connected to the two first reserved through holes 403 in the first segment pier 4; it also includes a flexible steel strand 8, which passes through one of the first reserved through holes 403 of the first segment pier 4, passes through the U-shaped through hole 503 of the second segment pier 5, and comes out from the other first reserved through hole 403 of the first segment pier 4. A conical clamp 801 sleeved on the flexible steel strand 8 is installed at the top position of the first reserved through hole 403 of the first segment pier 4, and a tensioning device is arranged on the conical clamp 801, which is used to prestress the flexible steel strand 8.

[0064] Optionally, the tensioning device may use a through-type jack 802 to perform prestressing tensioning on the flexible steel strand 8 .

[0065] Furthermore, a bottom steel plate 506 is fixedly connected to the bottom of the second segment pier 5, and the bottom steel plate 506 is welded and fixed to the second steel pipe 501. A plurality of wing-shaped support plates 504 are arranged on the periphery of the bottom steel plate 506, and the plurality of wing-shaped support plates 504 are fixedly connected between the bottom steel plate 506 and the second steel pipe 501; the bottom steel plate 506 is provided with a plurality of second reserved through holes 505; the bottom of the bottom steel plate 506 is fixedly connected to a shear column 507, and the bottom of the shear column 507 is fixedly connected to a shear bottom plate 508.

[0066] Preferably, the recessed portion 502 is butted against the protruding portion 402, and the cross-sectional area of ​​the recessed portion 502 is slightly larger than the cross-sectional area of ​​the protruding portion 402; the depth of the recessed portion 502 is smaller than the length of the protruding portion 402; this design facilitates the butt joint of the upper and lower segments during construction, and is convenient for leaving post-casting joints, which is beneficial to the overall strength.

[0067] Preferably, eight wing-shaped support plates 504 are evenly arranged around the bottom steel plate 506, and the eight wing-shaped support plates 504 are welded between the bottom steel plate 506 and the second steel tube 501. The wing-shaped support plates 504 can effectively disperse the force borne by the pier, reduce the vibration of the pier caused by external factors such as wind force, earthquake, etc., and thus enhance its overall stability.

[0068] Furthermore, a pile foundation 9 is provided below the second segment pier 5, and a plurality of threaded steel bars 901 are provided in the pile foundation 9, and the plurality of threaded steel bars 901 are connected to the plurality of second reserved through holes 505 one by one, and the plurality of threaded steel bars 901 pass through the plurality of second reserved through holes 505 respectively; a reserved groove 902 is provided on the top of the pile foundation 9, and the shape of the reserved groove 902 is adapted to the shear column 507 and the shear bottom plate 508, and the reserved groove 902 is connected to the shear column 507 and the shear bottom plate 508. The shear column 507 is butt-jointed with the shear-resistant bottom plate 508; a correcting bolt 11 is arranged on the pile foundation 9, and the correcting bolt 11 is sleeved on the threaded steel bar 901 extending out of the pile foundation 9; the bottom steel plate 506 of the second segment pier 5 is located on the correcting bolt 11; a bottom joint 10 is formed between the bottom steel plate 506 and the pile foundation 9, and high-strength concrete is poured in the bottom joint 10; multiple layers of bolts 12 are fastened through the threaded steel bar 901 above the bottom steel plate 506.

[0069] Preferably, four second reserved through holes 505 are arranged at the four corners of the bottom steel plate 506; a square shear column 507 is arranged on the bottom steel plate 506; and a shear bottom plate 508 is arranged at the bottom of the shear column 507. At the same time, four threaded steel bars 901 are extended from the pile foundation 9 to connect with the second reserved through holes 505; a square reserved groove 902 is arranged on the top of the pile foundation 9 to connect with the square shear column 507 and the shear bottom plate 508. By extending the square shear column 507 and the shear bottom plate 508 into the reserved groove 902 of the pile foundation 9, the two structures of the pile foundation 9 and the second segment pier 5 can be accurately connected; after the connection is completed, the bottom joint 10 formed between the bottom steel plate 506 and the pile foundation 9 is poured with high-strength concrete, so that the connection between the pile foundation 9 and the second segment pier 5 is more firm and reliable.

[0070] In some embodiments, the arched energy-absorbing connecting ring 6 is annular as a whole, and its cross-section is arched. The arched part in the middle of the arched energy-absorbing connecting ring 6 is provided with a plurality of diamond-shaped hollows 601; the arched energy-absorbing connecting ring 6 is divided into two pages, which are connected by a second bolt 603 and hinged around the connection between the first segment pier 4 and the second segment pier 5. The upper and lower ends of the arched energy-absorbing connecting ring 6 are fixedly connected to the first segment pier 4 and the second segment pier 5 respectively by a first bolt 602.

[0071] Preferably, a plurality of diamond-shaped hollows 601 are provided in the arched middle part of the arched energy dissipation connection ring 6. The design of the diamond-shaped hollows 601 improves the energy dissipation capacity of the arched energy dissipation connection ring 6. This design allows the arched energy dissipation connection ring 6 to absorb more energy through local deformation without sacrificing the overall structural strength; when subjected to external impact, the diamond-shaped hollows 601 can be deformed or damaged first, thereby absorbing and dispersing the impact force. In this way, the arched energy dissipation connection ring 6 can effectively protect the bolt connection and prevent the device from falling off due to impact.

[0072] Preferably, the arched energy-absorbing connecting ring 6 is intended to be made of steel with excellent energy-absorbing characteristics, including but not limited to Q355 steel, Q345 steel, Q235 steel and Q390 steel.

[0073] Optionally, based on the bionics research results of the arch curvature of dragonfly wings, the present invention accurately sets the span ratio of the energy-absorbing arch to 1 / 3. The specific size of the arched energy-absorbing connecting ring 6 needs to be comprehensively determined by the following design formula based on the actual size of the crash pier and its material properties. Take Q355 steel as an example for example design: the proposed crash pier diameter is 400mm, then the thickness of the arched energy-absorbing connecting ring 6 is designed to be 12mm, its maximum cross-sectional diameter is set to 410mm, and the length of the arched arched part is determined to be 100mm. Note: The calculated data can be appropriately adjusted according to actual conditions as a design reference.

[0074]

[0075] Where: ρ is the thickness-to-height ratio of the arch structure, Wherein a is the thickness of the arched energy dissipation connecting ring 6, and h is the maximum cross-sectional circumference of the arched energy dissipation connecting ring 6;

[0076] μ is Poisson’s ratio;

[0077] β is the aspect ratio of the arch structure, Where b is the length of the arched part;

[0078] E is the elastic modulus;

[0079] τ cr，l is the critical buckling shear stress of the steel plate.

[0080] In addition, the present invention also provides a construction method for prefabricated and assembled anti-collision piers of segments of an external corrugated anti-collision device, using the prefabricated and assembled anti-collision piers of segments of an external corrugated anti-collision device, the construction method comprises:

[0081] Step 1: prefabricate the corrugated anti-collision device 1; prefabricate the corrugated anti-collision device outer wall 2, the corrugated anti-collision device inner wall 3 and the corrugated unit body according to the size of the anti-collision pier, and fix the corrugated unit body between the corrugated anti-collision device outer wall 2 and the corrugated anti-collision device inner wall 3 by welding;

[0082] Step 2: prefabricate the first segment pier 4 and the second segment pier 5 of the crash pier in blocks; after tying the steel cage, use the first steel pipe 401 and the second steel pipe 501 as templates, bury the corrugated pipe and cast it, and leave the first reserved through hole 403 and the reserved U-shaped through hole 503;

[0083] Step three: sleeve the deviation correction bolt 11 on the threaded steel bar 901 extending from the pile foundation 9; hoist the second segment pier 5 above the pile foundation 9, align the shear column 507 at the bottom of the second segment pier 5 with the reserved groove 902 in the pile foundation 9, and align the second reserved through hole 505 with the threaded steel bar 901 extending from the pile foundation 9; when the two sides are aligned, lower the second segment pier 5; after the second segment pier 5 is lowered, adjust the screwing amount of the deviation correction bolt 11 according to the actual situation, so that the second segment pier 5 remains vertical as a whole, and correct the construction deviation; after the deviation is corrected, use multi-layer bolts 12 to screw into the threaded steel bar 901 passing through the bottom steel plate 506, and pour high-strength concrete on the bottom joint 10 between the bottom steel plate 506 and the pile foundation 9, and now the second segment pier 5 is installed;

[0084] Step 4: hoist the first segment pier 4 so that the protrusion 402 is embedded in the recess 502; since the length of the protrusion 402 is greater than the depth of the recess 502, and the cross-sectional area of ​​the recess 502 is greater than the cross-sectional area of ​​the protrusion 402, a segment joint seam 7 is formed between the first segment pier 4 and the second segment pier 5; appropriately rotate the first segment pier 4 so that its first reserved through hole 403 corresponds to the U-shaped through hole 503 of the second segment pier 4;

[0085] Step 5: Pass the flexible steel strand 8 through one of the first reserved through holes 403 of the first segment pier 4, through the U-shaped through hole 503 of the second segment pier 5, and out of the other first reserved through hole 403 of the first segment pier 4; after slight adjustment, install a conical clamp 801 at the top of the first reserved through hole 403 of the first segment pier 4, and use a through-type jack 802 to prestress the flexible steel strand 8, so that the first segment pier 4 and the second segment pier 5 fit tightly; then cut off the excessively long flexible steel strand 8;

[0086] Step 6: Concrete grouting is performed on the segment joint 7 between the first segment pier 4 and the second segment pier 5 and the top position of the first reserved through hole 403 of the first segment pier 4;

[0087] Step 7: Hinging the two leaves of the arched energy dissipation connecting ring 6 at the connection between the first segment pier 4 and the second segment pier 5, and fixing the hinges with the second bolts 603; and fixing the arched energy dissipation connecting ring 6 as a whole to the first steel pipe 401 of the first segment pier 4 and the second steel pipe 501 of the second segment pier 5 with the first bolts 602;

[0088] Step 8: Use the third bolt 1301 to pass through the third reserved through hole 1302 to fix the limit ring 13 on the first steel pipe 401 of the first segment pier 4 according to the designed position;

[0089] Step 9: Heat the corrugated anti-collision device 1 in water insulation to slightly expand its volume, then quickly hoist it and put it on the first segment pier 4, and limit the corrugated anti-collision device 1 from sliding down by the limit ring 13; after the corrugated anti-collision device 1 cools down, it is tightly fixed on the outer wall of the first segment pier 4;

[0090] Step 10: Withdraw the relevant equipment and wait for the grouting material to reach the set strength, and the construction of the crash pier is completed.

[0091] The principles and implementation methods of the present invention are described in this article using specific embodiments. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A segmented prefabricated assembly crash pier with an external corrugated crash protection device, characterized in that: The invention comprises a first segment pier (4) and a second segment pier (5) connected to the first segment pier (4), wherein a corrugated anti-collision device (1) is sleeved on the outer side of the first segment pier (4); the corrugated anti-collision device (1) comprises an inner wall (3) of the corrugated anti-collision device, an outer wall (2) of the corrugated anti-collision device sleeved outside the inner wall (3) of the corrugated anti-collision device, and a plurality of corrugated unit bodies arranged between the inner wall (3) of the corrugated anti-collision device and the outer wall (2) of the corrugated anti-collision device, wherein the inner wall (3) of the corrugated anti-collision device is sleeved on the outer periphery of the first segment pier (4); the corrugated unit bodies The body comprises a corrugated unit body inner wall (101), a corrugated unit body outer wall (103) sleeved outside the corrugated unit body inner wall (101), and a plurality of corrugated unit body supporting walls (102) connected between the corrugated unit body inner wall (101) and the corrugated unit body outer wall (103), wherein the corrugated unit body supporting wall (102) comprises a plurality of corrugated structural plates arranged in pairs, wherein two of each pair of corrugated structural plates are symmetrically arranged and intersected in the middle, and two ends of each pair of corrugated structural plates are respectively connected to the corrugated unit body inner wall (101) and the corrugated unit body outer wall (103).

2. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 1, characterized in that: An arched energy-absorbing connecting ring (6) is arranged at the periphery of the connection between the first segment pier (4) and the second segment pier (5); the arched energy-absorbing connecting ring (6) is annular as a whole and has an arched cross-section; a plurality of diamond-shaped hollows (601) are arranged at the arched portion in the middle of the arched energy-absorbing connecting ring (6); the arched energy-absorbing connecting ring (6) is divided into two leaves, which are connected by a second bolt (603) and hinged around the connection between the first segment pier (4) and the second segment pier (5); the upper and lower ends of the arched energy-absorbing connecting ring (6) are respectively fixedly connected to the first segment pier (4) and the second segment pier (5) by a first bolt (602).

3. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 1, characterized in that: The corrugated anti-collision device (1) is an annular structure, the corrugated unit body is cylindrical as a whole, and the axis of each corrugated unit body, the axis of the outer wall (2) of the corrugated anti-collision device, and the axis of the inner wall (3) of the corrugated anti-collision device are parallel.

4. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 1, characterized in that: The first segment pier (4) and the second segment pier (5) are both cylindrical, the first segment pier (4) is connected to the top of the second segment pier (5), the first segment pier (4) is wrapped with a first steel pipe (401) on the outside, a protruding portion (402) with a reduced cross-section is provided at the bottom, and two first reserved through holes (403) are provided inside; wherein the inner wall (3) of the corrugated anti-collision device is sleeved on the outer periphery of the first steel pipe (401) of the first segment pier (4).

5. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 4, characterized in that: The second segment pier (5) is provided with a second steel pipe (501) on the outside, and a recessed portion (502) is provided on the top, the recessed portion (502) is butted against the protruding portion (402), the cross-sectional area of ​​the recessed portion (502) is larger than the cross-sectional area of ​​the protruding portion (402), and the depth of the recessed portion (502) is smaller than the length of the protruding portion (402), so that a segment joint (7) is formed between the first segment pier (4) and the second segment pier (5), and high-strength concrete is poured in the segment joint (7); a U-shaped through hole (503) is provided inside the second segment pier (5), the upper end of the U-shaped through hole (503) is connected to the recessed portion (502), and the U-shaped through hole (503) is connected to the protruding portion (402). 3) docking with the two first reserved through holes (403) in the first segment pier (4); also includes a flexible steel strand (8), the flexible steel strand (8) passes through one of the first reserved through holes (403) of the first segment pier (4), passes through the U-shaped through hole (503) of the second segment pier (5), and comes out from the other first reserved through hole (403) of the first segment pier (4), a conical clamp (801) sleeved on the flexible steel strand (8) is installed at the top position of the first reserved through hole (403) of the first segment pier (4), and a tensioning device is arranged on the conical clamp (801), and the tensioning device is used to prestress the flexible steel strand (8).

6. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 5, characterized in that: The bottom of the second segment pier (5) is fixedly connected to a bottom steel plate (506), the bottom steel plate (506) is fixedly connected to the second steel pipe (501), a plurality of wing-shaped support plates (504) are arranged on the periphery of the bottom steel plate (506), the plurality of wing-shaped support plates (504) are fixedly connected between the bottom steel plate (506) and the second steel pipe (501); the bottom steel plate (506) is provided with a plurality of second reserved through holes (505); the bottom of the bottom steel plate (506) is fixedly connected to a shear column (507), the bottom of the shear column (507) is fixedly connected to a shear bottom plate (508).

7. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 6, characterized in that: A pile foundation (9) is arranged below the second segment pier (5), and a plurality of threaded steel bars (901) are arranged in the pile foundation (9), and the plurality of threaded steel bars (901) are connected to the plurality of second reserved through holes (505) one by one, and the plurality of threaded steel bars (901) pass through the plurality of second reserved through holes (505) respectively; a reserved groove (902) is arranged on the top of the pile foundation (9), and the shape of the reserved groove (902) is adapted to the shear column (507) and the shear bottom plate (508), and the reserved groove (902) is connected to the shear column (507). 7) and the shear-resistant bottom plate (508); the pile foundation (9) is provided with a correcting bolt (11), the correcting bolt (11) is sleeved on the threaded steel bar (901) extending from the pile foundation (9), the bottom steel plate (506) of the second segment pier (5) is located on the correcting bolt (11), a bottom joint (10) is formed between the bottom steel plate (506) and the pile foundation (9), and high-strength concrete is poured in the bottom joint (10); the threaded steel bar (901) passing through the top of the bottom steel plate (506) is fastened with multiple layers of bolts (12).

8. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 1, characterized in that: A limiting ring (13) is also sleeved on the outer side of the first segment pier (4), and the limiting ring (13) abuts against the bottom of the corrugated anti-collision device (1); the limiting ring (13) is annular as a whole, and is provided with a plurality of third reserved through holes (1302) along the circumferential direction, and a third bolt (1301) is provided in each of the third reserved through holes (1302), and the limiting ring (13) is fixedly connected to the first segment pier (4) via the third bolt (1301).

9. The segment prefabricated assembled crash pier of the external corrugated crash protection device according to claim 2, characterized in that: The size of the arched energy dissipation connecting ring (6) is determined by the following formula: Where: ρ is the thickness-to-height ratio of the arch structure, Wherein a is the thickness of the arched energy dissipation connecting ring (6), and h is the maximum cross-sectional circumference of the arched energy dissipation connecting ring (6); μ is Poisson’s ratio; β is the aspect ratio of the arch structure, Where b is the length of the arched part; E is the elastic modulus; τ cr，l is the critical buckling shear stress of the steel plate.

10. A construction method for prefabricating and assembling a crash pier with a segmented external corrugated crash protection device, characterized in that: A segmented prefabricated assembly crash pier using an external corrugated crash protection device according to any one of claims 1 to 9, the construction method comprising: Step 1: prefabricate a corrugated anti-collision device (1); prefabricate an outer wall (2) of the corrugated anti-collision device, an inner wall (3) of the corrugated anti-collision device and a corrugated unit body according to the size of the anti-collision pier, and fix the corrugated unit body between the outer wall (2) of the corrugated anti-collision device and the inner wall (3) of the corrugated anti-collision device by welding; Step 2: prefabricate the first segment pier (4) and the second segment pier (5) of the crash pier in blocks; after tying the steel cage, use the first steel pipe (401) and the second steel pipe (501) as templates, bury the corrugated pipe and cast, and leave the first reserved through hole (403) and the reserved U-shaped through hole (503); Step three: sleeve the deviation correction bolt (11) on the threaded steel bar (901) extending from the pile foundation (9); hoist the second segment pier (5) above the pile foundation (9), align the shear column (507) at the bottom of the second segment pier (5) with the reserved groove (902) in the pile foundation (9), and align the second reserved through hole (505) with the threaded steel bar (901) extending from the pile foundation (9); when the two sides are aligned, lower the second segment pier (5); after the second segment pier (5) is lowered, adjust the screwing amount of the deviation correction bolt (11) so that the second segment pier (5) remains vertical as a whole to correct the construction deviation; after the deviation is corrected, use multi-layer bolts (12) to screw into the threaded steel bar (901) passing through the bottom steel plate (506), and pour high-strength concrete into the bottom joint (10) between the bottom steel plate 506 and the pile foundation (9), and the second segment pier (5) is installed. Step 4: hoist the first segment pier (4) so ​​that the protruding portion (402) is embedded in the recessed portion (502); since the length of the protruding portion (402) is greater than the depth of the recessed portion (502), and the cross-sectional area of ​​the recessed portion (502) is greater than the cross-sectional area of ​​the protruding portion (402), a segment joint seam (7) is formed between the first segment pier (4) and the second segment pier (5); appropriately rotate the first segment pier (4) so ​​that its first reserved through hole (403) corresponds to the U-shaped through hole (503) of the second segment pier (4); Step 5: Pass the flexible steel strand (8) through one of the first reserved through holes (403) of the first segment pier (4), pass through the U-shaped through hole (503) of the second segment pier (5), and pass out from another first reserved through hole (403) of the first segment pier (4); after slight adjustment, install a conical clamp (801) at the top position of the first reserved through hole (403) of the first segment pier (4), and use a through-type jack (802) to prestress the flexible steel strand (8), so that the first segment pier (4) and the second segment pier (5) are tightly fitted; then cut off the excessively long flexible steel strand (8); Step 6: Concrete grouting is performed on the segment joint (7) between the first segment pier (4) and the second segment pier (5), and the top position of the first reserved through hole (403) of the first segment pier (4); Step 7: Hinging the two leaves of the arched energy dissipation connecting ring (6) at the connection between the first segment pier (4) and the second segment pier (5), and fixing the hinges with the second bolt (603); and simultaneously fixing the arched energy dissipation connecting ring (6) as a whole to the first steel pipe (401) of the first segment pier (4) and the second steel pipe (501) of the second segment pier (5) with the first bolt (602); Step 8: Use the third bolt (1301) to pass through the third reserved through hole (1302) to fix the limit ring (13) on the first steel pipe (401) of the first segment pier (4) according to the designed position; Step 9: Heat the corrugated anti-collision device (1) in water insulation to slightly expand its volume, then quickly hoist it and put it on the first segment pier (4), and use the limit ring (13) to limit the corrugated anti-collision device (1) from sliding down; after the corrugated anti-collision device (1) cools down, it is firmly fixed on the outer wall of the first segment pier (4); Step 10: Withdraw the relevant equipment and wait for the grouting material to reach the set strength, and the construction of the crash pier is completed.

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