Prefabricated assembled pier structure for bridge and construction method thereof

Abstract

The present invention discloses a prefabricated assembled pier column structure for bridges and a construction method thereof, which relates to the technical field of bridges. The prefabricated assembled pier column structure includes: a cap, the cap having a first end face and a second end face, a first side wall and a second side wall, the upper end face of the cap having a guide groove, the extension direction of the guide groove being the same as the extension direction of the cap and penetrating at least one of the first end face and the second end face, a first through-hole unit being provided on the first side wall, and a second through-hole unit being provided on the second side wall; a prefabricated pier column, the prefabricated pier column including an embedded portion and a column body, the embedded portion having a third through-hole unit, and the embedded portion of the prefabricated pier column being able to be installed into the guide groove from one end face of the cap; and a steel bar unit, the steel bar unit being passed through the first through-hole unit, the third through-hole unit, and the second through-hole unit. The present application can solve the problem that the prefabricated assembled pier column structure has poor seismic performance and cannot be used in high seismic intensity areas.

Description

Technical Field

[0001] The present invention relates to the technical field of bridges, and in particular to a prefabricated assembled pier column structure for bridges and a construction method thereof. Background Art

[0002] Prefabricated bridge piers are prefabricated, easily assembled and disassembled, and quickly erected. They can be used for bridge construction, repairing damaged bridges, and even in military applications. China's prefabricated bridge development started relatively late, with the successful development of pier assembly technology in the 1960s, primarily focused on assembling standard equipment for military repairs.

[0003] In the civilian sector, the New Macau-Taipa Bridge, built from April to December 1994, marked my country's first large-scale application of prefabricated abutments and piers. The Hongchu Expressway, constructed from March 1996 to August 1999, was the first project to utilize fully prefabricated construction methods. The prefabricated piers were constructed using a cantilever method, and after assembly, the pier segments were connected by tensioning prestressed steel tendons. The second phase of the Shanghai-Fujian Viaduct, constructed from December 2001 to the end of September 2003, employed fully prefabricated assembly technology. Based on the design and construction experience of the entire project, a simplified standard for prefabricated bridges, "Guidelines for Assembly and Acceptance of Concrete Segmental Beams," was issued. The Donghai Bridge (built from June 2002 to May 25, 2005), the Hangzhou Bay Bridge (built from June 2003 to February 2008), the Shanghai Yangtze River Bridge (built from May 2005 to October 31, 2009), and the lower section of the Jintang Bridge (built from October 2005 to June 2009) all utilized prefabricated assembly technology. In 2012, the Shanghai S6 Highway project pioneered the prefabrication of piers and cap beams, constructing a three-span, eight piers, and four cap beams. The Jiamin Elevated Road (G2 Highway-S6 Highway) project, which began construction in 2013, extensively promoted prefabricated bridge construction. Columns, cap beams, small box girders, and crash barriers all utilize prefabricated construction techniques, with a prefabricated assembly rate above the abutment reaching 70%.

[0004] However, it's worth noting that bridges using prefabricated construction technology, such as the Shanghai Yangtze River Bridge, Jintang Bridge, and Pearl River Bridge, are all located in areas with a seismic intensity of 6, where seismic fortification requirements are lower and, consequently, the demand for prefabrication and assembly technology is relatively low. In areas with a seismic intensity of 8, prefabricated piers have yet to be widely used in high-intensity earthquake zones. Therefore, further research is needed on the structural design and research of prefabricated piers in these areas. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a prefabricated and assembled pier structure for bridges and a construction method thereof, which can solve the problem that the prefabricated assembled pier structure has poor seismic performance and cannot be used in high seismic intensity areas.

[0006] The specific technical solution of the embodiment of the present invention is:

[0007] A prefabricated and assembled pier column structure for a bridge, comprising:

[0008] A support platform, the support platform having corresponding first and second end faces, corresponding first and second side walls, the upper end face of the support platform having a guide groove, the extension direction of the guide groove being the same as the extension direction of the support platform and passing through at least one of the first and second end faces, the first side wall having a first through-hole unit, and the second side wall having a second through-hole unit corresponding to the position of the first through-hole unit;

[0009] A prefabricated pier column, comprising an embedded portion and a column located above the embedded portion, wherein the embedded portion is provided with a third through-hole unit extending along the thickness direction thereof, and the embedded portion of the prefabricated pier column can be installed into the guide groove from one end surface of the pedestal;

[0010] A steel bar unit is passed through the first through-hole unit, the third through-hole unit and the second through-hole unit to achieve fixation between the prefabricated pier and the cap.

[0011] Preferably, the guide groove includes a first portion of the guide groove and a second portion of the guide groove located below the first portion of the guide groove; the width of the upper end of the second portion of the guide groove is greater than the width of the lower end of the first portion of the guide groove;

[0012] The embedded portion includes a first embedded portion and a second embedded portion located below the first embedded portion, and the width of the upper end of the second embedded portion is greater than the width of the lower end of the first embedded portion.

[0013] Preferably, the first part embedded portion is arranged in the first part guide groove, and the cross-sectional shape of the first part embedded portion corresponds to the cross-sectional shape of the first part guide groove; the second part embedded portion is arranged in the second part guide groove, and the cross-sectional shape of the second part embedded portion corresponds to the cross-sectional shape of the second part guide groove.

[0014] Preferably, the cross section of the first portion of the guide groove is rectangular or trapezoidal; the cross section of the second portion of the guide groove is rectangular or trapezoidal.

[0015] Preferably, the first through-hole unit includes a top first through-hole and a bottom first through-hole, wherein the top first through-hole is located at the upper end of the platform; the bottom first through-hole is located above and close to the bottom of the guide groove;

[0016] The second through-hole unit includes a top second through-hole and a bottom second through-hole, wherein the top second through-hole is located at the upper end of the support platform; the bottom second through-hole is located above the bottom of the guide groove and close to the bottom of the guide groove;

[0017] The third through-hole unit includes a top third through-hole and a bottom third through-hole. The top third through-hole is located at the upper end of the first partial embedded portion, and the bottom third through-hole is located at the lower end of the second partial embedded portion.

[0018] Preferably, grouting material is injected between the first through-hole unit, the third through-hole unit, the second through-hole unit and the steel bar unit.

[0019] Preferably, both ends of the steel bar unit pass through the side walls of the pedestal respectively, and both ends of the steel bar unit are connected to fixing members capable of supporting the side walls of the pedestal respectively.

[0020] Preferably, grouting material is filled between the embedded portion and the inner wall of the guide groove.

[0021] A construction method for a prefabricated assembled pier structure for a bridge comprises the following steps:

[0022] Tie steel bars and cast to form a cap having a guide groove on its upper end surface, the cap having corresponding first and second end surfaces, and corresponding first and second side walls, the guide groove extending in the same direction as the cap and penetrating at least one of the first and second end surfaces, forming a first through-hole unit on the first side wall, and forming a second through-hole unit on the second side wall corresponding to the position of the first through-hole unit;

[0023] Transporting a prefabricated pier column to the construction site of the cap, the prefabricated pier column comprising an embedded portion and a column body located above the embedded portion, the embedded portion being provided with a third through-hole unit extending in the thickness direction thereof, hoisting the prefabricated pier column so that the embedded portion of the prefabricated pier column is installed into the guide groove from one end face of the cap;

[0024] Passing a steel bar unit through the first through-hole unit, the third through-hole unit, and the second through-hole unit to achieve fixation between the prefabricated pier column and the cap, and connecting fixing members against the side walls of the cap at both ends of the steel bar unit;

[0025] injecting grouting material between the first through-hole unit, the third through-hole unit, the second through-hole unit and the steel bar unit;

[0026] A grouting material is filled between the side wall of the embedding portion and the inner side wall of the guide groove.

[0027] Preferably, the step of hoisting the prefabricated pier column and installing the embedded portion of the prefabricated pier into the guide groove from one end surface of the pedestal includes:

[0028] Laying mortar at the bottom of the guide groove of the cap;

[0029] After the mortar at the bottom of the guide groove is laid, the prefabricated pier column is hoisted and the embedded portion of the prefabricated pier is installed into the guide groove from one end surface of the base.

[0030] The technical solution of the present invention has the following significant beneficial effects:

[0031] This application proposes a new prefabricated assembled pier column structure, which utilizes the relative sliding assembly between the guide groove of the pedestal and the embedded part of the prefabricated pier column, and then the steel bar unit is inserted into the first through-hole unit, the third through-hole unit and the second through-hole unit to achieve the fixation between the prefabricated pier column and the pedestal, thus forming the assembled pier column structure. In this pier column structure, the steel bar units connecting the pedestal and the prefabricated pier column are continuous and complete, rather than secondary connections, and the mutual limitation between the guide groove and the embedded part effectively improves the bearing capacity and durability of the structure, and also makes the structure have better bending resistance, that is, the prefabricated pier column is not easy to bend toward the first side wall or the second side wall, so the seismic performance of the entire structure is effectively improved, and it can be used in areas with high seismic intensity.

[0032] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0034] Figure 1 This is a front view of a prefabricated assembled pier structure for a bridge according to an embodiment of the present invention;

[0035] Figure 2 A side view of a prefabricated assembled pier structure for a bridge according to an embodiment of the present invention;

[0036] Figure 3 A top view of a prefabricated assembled pier structure for a bridge according to an embodiment of the present invention;

[0037] Figure 4 1 is a front view of a prefabricated pier in a prefabricated assembled pier structure for a bridge according to an embodiment of the present invention;

[0038] Figure 5 A side view of a prefabricated pier in a prefabricated assembled pier structure for a bridge according to an embodiment of the present invention;

[0039] Figure 6 A top view of a prefabricated pier in a prefabricated assembled pier structure for a bridge according to an embodiment of the present invention;

[0040] Figure 7 This is a front view of a cap in a prefabricated pier structure for a bridge according to an embodiment of the present invention;

[0041] Figure 8 A side view of a cap in a prefabricated pier structure for a bridge according to an embodiment of the present invention;

[0042] Figure 9 It is a top view of a cap in a prefabricated assembled pier structure for a bridge in an embodiment of the present invention.

[0043] Reference numerals in the above drawings:

[0044] 1. Cap; 11. First end face; 12. Second end face; 13. First side wall; 14. Second side wall; 15. Guide groove; 151. First part guide groove; 152. Second part guide groove; 16. First through-hole unit; 161. First through-hole on the top layer; 162. First through-hole on the bottom layer; 17. Second through-hole unit; 171. Second through-hole on the top layer; 172. Second through-hole on the bottom layer; 18. Support column; 2. Prefabricated pier; 21. Embedded portion; 211. First part embedded portion; 212. Second part embedded portion; 22. Column; 23. Third through-hole unit; 231. Third through-hole on the top layer; 232. Third through-hole on the bottom layer; 3. Steel bar unit. DETAILED DESCRIPTION

[0045] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for illustrative purposes only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, all of which should be considered within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] Currently, prefabricated bridge piers utilize grouting sleeves for connecting segments. The connection between the pier body and the abutment 1 can be divided into two types: socket-and-spigot connection and grouting sleeve connection. These methods are suitable for areas with seismic intensities of 6 and 7. However, due to the limitations of their current structural design, prefabricated bridge piers still have shortcomings in various aspects of their load-bearing performance and relatively weak seismic resistance, making them difficult to implement on a large scale in areas with high seismic intensity (8 and above).

[0048] In order to solve the problem that the prefabricated assembled pier column structure has poor seismic performance and cannot be used in high seismic intensity areas, a prefabricated assembled pier column structure for a bridge is proposed in the embodiment of the present application, such as Figures 1 to 9 As shown, the prefabricated assembled pier column structure for a bridge may include: a cap 1, the cap 1 having a corresponding first end face 11 and a second end face 12, a corresponding first side wall 13 and a second side wall 14, the upper end face of the cap 1 having a guide groove 15, the extension direction of the guide groove 15 is the same as the extension direction of the cap 1 and passes through at least one of the first end face 11 and the second end face 12, the first side wall 13 is provided with a first through hole unit 16, and the second side wall 14 is provided with a first through hole unit 16. A corresponding second through-hole unit 17; a prefabricated pier 2, the prefabricated pier 2 includes an embedded portion 21 and a column 22 located above the embedded portion 21, and the embedded portion 21 is provided with a third through-hole unit 23 extending along its thickness direction. The embedded portion 21 of the prefabricated pier 2 can be installed into the guide groove 15 from one end face of the base 1; the steel bar unit 3, the steel bar unit 3 is inserted into the first through-hole unit 16, the third through-hole unit 23 and the second through-hole unit 17 to achieve fixation between the prefabricated pier 2 and the base 1.

[0049] This application proposes a new prefabricated assembled pier column structure, which utilizes the relative sliding assembly between the guide groove 15 of the pedestal 1 and the embedded portion 21 of the prefabricated pier column 2, and then passes the steel bar unit 3 through the first through-hole unit 16, the third through-hole unit 23 and the second through-hole unit 17 to achieve the fixation between the prefabricated pier column 2 and the pedestal 1, thus forming the assembled pier column structure. In this pier column structure, the steel bar units 3 connecting the pedestal 1 and the prefabricated pier column 2 are continuous and complete, rather than secondary connections, and the mutual limitation between the guide groove 15 and the embedded portion 21 effectively improves the bearing capacity and durability of the structure, and also makes the structure have better bending resistance, that is, the prefabricated pier column 2 is not easy to bend toward the first side wall 13 or the second side wall 14, so the seismic performance of the entire structure is effectively improved, and it can be used in areas with high seismic intensity.

[0050] In order to better understand the prefabricated assembled pier structure for bridges in this application, it will be further explained and illustrated below. Figures 1 to 9As shown, the prefabricated assembled pier column structure for a bridge may include: a cap 1, a prefabricated pier column 2 that can be installed on the cap 1 by assembly, and a steel bar unit 3 for fixing the cap 1 and the prefabricated pier column 2.

[0051] like Figures 7 to 9 As shown, the platform 1 has a corresponding first end face 11 and a second end face 12, a corresponding first side wall 13 and a second side wall 14, and a corresponding upper end face and a lower end face. Figure 4 As shown, the first end face 11 and the second end face 12 are respectively the left end and the right end of the platform 1. Figure 5 As shown, the first side wall 13 and the second side wall 14 are the side walls on the left and right sides of the support 1 respectively, and the upper end face and the lower end face are the end face of the upper part of the support 1 and the end face of the lower end of the support 1 respectively. Figure 4 The horizontal direction of the platform 1 is Figure 4 The vertical direction of the platform 1 is Figure 5 Horizontal direction in .

[0052] like Figures 7 to 9 As shown, the cap 1 extends along its length. A guide groove 15 is defined on the upper end surface of the cap 1, extending along its length. The guide groove 15 is used to mount the embedded portion 21 of the precast pier 2. The guide groove 15 penetrates at least one of the first end surface 11 and the second end surface 12, allowing the embedded portion 21 of the precast pier 2 to be installed into the guide groove 15 from the penetrated end surface.

[0053] like Figure 7 As shown, the first side wall 13 of the cap 1 has a first through-hole unit 16 extending along the width of the cap 1. The second side wall 14 has a second through-hole unit 17 corresponding to the first through-hole unit 16 and extending along the width of the cap 1. The first through-hole unit 16 and the second through-hole unit 17 are used to pass the rebar unit 3 after the precast pier 2 is installed on the cap 1, thereby securing the precast pier 2 to the cap 1.

[0054] like Figure 7 and Figure 8As shown, as a feasible embodiment, the first through-hole unit 16 includes a top-layer first through-hole 161 and a bottom-layer first through-hole 162. The top-layer first through-hole 161 is located at the upper end of the pedestal 1. Furthermore, the distance between the top-layer first through-hole 161 and the upper end surface of the pedestal 1 can be between 10 cm and 15 cm. The bottom-layer first through-hole 162 is located above and close to the bottom of the guide groove 15. Furthermore, the distance between the bottom-layer first through-hole 162 and the bottom of the guide groove 15 can be between 8 cm and 14 cm. Correspondingly, the second through-hole unit 17 includes a top-layer second through-hole 171 and a bottom-layer second through-hole 172. The top-layer second through-hole 171 is located at the upper end of the pedestal 1; the bottom-layer second through-hole 172 is located above and close to the bottom of the guide groove 15. Through the above structure, the steel bar unit 3 can fix the prefabricated pier 2 installed in the guide groove 15 from the uppermost and lowermost positions, thereby maximizing the bending resistance and further improving the seismic performance of the structure. Furthermore, there can be multiple first through-holes 161 on the top layer and multiple first through-holes 162 on the bottom layer, arranged along the length of the cap 1. Since the guide groove 15 extends along the length of the cap 1, a sufficient number of first through-holes 161 on the top layer and multiple first through-holes 162 on the bottom layer can be provided in this direction, thereby further improving the securement between the cap 1 and the embedded portion 21 of the prefabricated pier 2 and enhancing the bending resistance.

[0055] like Figures 7 to 9 As shown, the lower end surface of the cap 1 may have a support column 18 extending in the vertical direction. There may be multiple support columns 18 arranged along the length of the cap 1. The cap 1 may be cast using concrete. Various types of steel bars may be tied into the cap 1 according to the loads that the cap 1 needs to bear. The steel bars may be located in various parts of the cap 1 or in the support columns 18, and will not be described in detail here.

[0056] like Figures 4 to 6 As shown, the prefabricated pier column 2 includes an embedded portion 21 and a column 22 located above the embedded portion 21. The length direction of the prefabricated pier column 2 is Figure 1 In the horizontal direction, the height direction of the prefabricated pier 2 is Figure 1 The vertical direction of the prefabricated pier 2 is Figure 2 The embedded portion 21 extends in the length direction and can be installed into the guide groove 15 from one end face of the base 1. The column 22 extends in the height direction and is used to support other components above the prefabricated pier 2. Figure 5In the embodiment, the cross-section of the embedded portion 21 matches the cross-section of the guide groove 15 of the platform 1, so that the embedded portion 21 cannot rotate toward the first side wall 13 or the second side wall 14 after being installed in the guide groove 15. The length of the column 22 is much shorter than the length of the embedded portion 21. In the length direction, the column 22 is located in the middle of the embedded portion 21. This method further ensures that the embedded portion 21 has sufficient strength and stability to support the column 22.

[0057] like Figure 4 and Figure 5 As shown, the embedded portion 21 is provided with a third through-hole unit 23 extending along its thickness direction. The third through-hole unit 23 is positioned in the height direction corresponding to the first through-hole unit 16 and the second through-hole unit 17, so that the steel bar unit 3 can be inserted into the first through-hole unit 16, the third through-hole unit 23, and the second through-hole unit 17.

[0058] As feasible, Figure 4 and Figure 5 As shown, the third through-hole unit 23 includes a top-layer third through-hole 231 and a bottom-layer third through-hole 232. The top-layer third through-hole 231 is located at the upper end of the first partially embedded portion 211, and the bottom-layer third through-hole 232 is located at the lower end of the second partially embedded portion 212. Part of the rebar unit 3 can be inserted into the top-layer first through-hole 161, the top-layer third through-hole 231, and the top-layer second through-hole 171, while part of the rebar unit 3 can be inserted into the bottom-layer first through-hole 162, the bottom-layer third through-hole 232, and the bottom-layer second through-hole 172. Through the above structure, the rebar unit 3 can securely connect the prefabricated pier 2 installed in the guide groove 15 from both the uppermost and lowermost positions, thereby maximizing the bending resistance and further enhancing the seismic performance of the structure.

[0059] Further, such as Figure 4 and Figure 5 As shown, there can be multiple third through-holes 231 on the top layer and multiple third through-holes 232 on the bottom layer, which are arranged along the length direction of the embedded portion 21. Since the embedded portion 21 extends along the length direction, a sufficient number of third through-holes 231 on the top layer and multiple third through-holes 232 on the bottom layer can be provided in this direction, thereby further improving the securement between the cap 1 and the embedded portion 21 of the precast pier 2 and enhancing the bending resistance.

[0060] like Figures 1 to 3As shown, the rebar in the rebar unit 3 is inserted through the first through-hole unit 16, the third through-hole unit 23, and the second through-hole unit 17 to secure the precast pier 2 to the cap 1. The two ends of the rebar unit 3 extend through the sidewall of the cap 1. Each end of the rebar unit 3 is connected to a fixing member that can abut against the sidewall of the cap 1, thereby preventing the rebar unit 3 from moving within the first through-hole unit 16, the third through-hole unit 23, and the second through-hole unit 17, effectively securing the rebar unit 3 to the cap 1 and the precast pier 2. For example, the fixing member can be a nut screwed onto the rebar.

[0061] To securely connect the rebar unit 3 to the precast pier 2 and the cap 1, grouting material is injected between the first through-hole unit 16, the third through-hole unit 23, the second through-hole unit 17, and the rebar unit 3. After the rebar unit 3 is inserted into the first through-hole unit 16, the third through-hole unit 23, and the second through-hole unit 17, the grouting material is injected. After the grouting material solidifies, the rebar unit 3 is secured to the precast pier 2 and the cap 1. A fast-setting and hardening grouting material is preferably used to shorten the setting time and thus the construction period.

[0062] like Figures 1 to 9 As shown, as a feasible embodiment, the guide groove 15 may include a first partial guide groove 151 and a second partial guide groove 152 located below the first partial guide groove 151. The width of the upper end of the second partial guide groove 152 is greater than the width of the lower end of the first partial guide groove 151. The embedded portion 21 may include a first partial embedded portion 211 and a second partial embedded portion 212 located below the first partial embedded portion 211. The width of the upper end of the second partial embedded portion 212 is greater than the width of the lower end of the first partial embedded portion 211. The above structure can effectively prevent the embedded portion 21 from vertically separating from the guide groove 15, so that the guide groove 15 limits the embedded portion 21 in the vertical direction.

[0063] like Figures 1 to 9 As shown, the first partial embedded portion 211 can be disposed in the first partial guide groove 151, and the cross-sectional shape of the first partial embedded portion 211 corresponds to the cross-sectional shape of the first partial guide groove 151. The second partial embedded portion 212 can be disposed in the second partial guide groove 152, and the cross-sectional shape of the second partial embedded portion 212 corresponds to the cross-sectional shape of the second partial guide groove 152.

[0064] As a feasible method, there is a step portion between the first part of the guide groove 151 and the second part of the guide groove 152. The step portion can prevent the embedded portion 21 from separating from the guide groove 15 in the vertical direction, so that the guide groove 15 limits the embedded portion 21 in the vertical direction. In addition, when the prefabricated pier 2 has a tendency to bend toward the first side wall 13 or the second side wall 14, the step portion presses down the prefabricated pier 2, thereby resisting the prefabricated pier 2, so that the structure has better bending resistance.

[0065] In a specific embodiment, the cross-section of the first guide groove 151 can be rectangular or trapezoidal. The cross-section of the second guide groove 152 can be rectangular or trapezoidal. The cross-section of the first embedded portion 211 corresponds to the cross-section of the first guide groove 151. The cross-section of the second embedded portion 212 corresponds to the cross-section of the second guide groove 152. When the cross-section of the first part guide groove 151 can be rectangular and the cross-section of the second part guide groove 152 is rectangular, the outer side walls of the first side wall 13 and the second side wall 14 of the platform 1 are parallel to the vertical direction. In this way, the wall thickness of the first side wall 13 and the second side wall 14 of the platform 1 at the first part guide groove 151 are the same, and the wall thickness of the first side wall 13 and the second side wall 14 of the platform 1 at the second part guide groove 152 are the same. When the prefabricated pier 2 has a tendency to bend toward the first side wall 13 or the second side wall 14, the first side wall 13 and the second side wall 14 of the platform 1 have the same strength at different positions of the second part guide groove 152, which can avoid local damage to the first side wall 13 and the second side wall 14 of the platform 1, thereby improving the seismic performance of the entire platform 1, so that it can be used in areas with higher earthquake intensity.

[0066] As a feasible option, grouting material may be filled between the embedded portion 21 and the inner wall of the guide groove 15. After the grouting material solidifies, the prefabricated pier column 2 and the cap 1 are fixed together, thereby improving the firmness of the fixation between the prefabricated pier column 2 and the cap 1. The grouting material may preferably be a fast-setting and fast-hardening fine stone grouting material to shorten the solidification time of the grouting material, thereby shortening the construction period, and further improving the firmness of the fixation between the prefabricated pier column 2 and the cap 1.

[0067] The construction method of the prefabricated pier structure for a bridge in the embodiment of the present application may include the following steps:

[0068] Rebar is tied and cast to form a cap 1 with a guide groove 15 on its upper end face. The cap 1 has corresponding first and second end faces 11, 12, and corresponding first and second side walls 13, 14. The guide groove 15 extends in the same direction as the cap 1 and penetrates at least one of the first and second end faces 11, 12. A first through-hole unit 16 is formed on the first side wall 13, and a second through-hole unit 17 corresponding to the position of the first through-hole unit 16 is formed on the second side wall 14. At the same time, a support column 18 extending vertically can be cast on the lower end face of the cap 1, thereby serving as a pile foundation. Once the cap 1 reaches the required strength, the prefabricated pier 2 can be assembled with the cap 1.

[0069] The prefabricated pier column 2 is transported to the construction site of the foundation 1. The prefabricated pier column 2 includes an embedded portion 21 and a column body 22 located above the embedded portion 21. The embedded portion 21 is provided with a third through hole unit 23 extending along the thickness direction thereof.

[0070] The prefabricated pier column 2 is hoisted and the embedded portion 21 of the prefabricated pier is installed into the guide groove 15 from one end face of the base cap 1. This step may specifically include: laying mortar at the bottom of the guide groove 15 of the base cap 1; after the mortar at the bottom of the guide groove 15 is laid, the prefabricated pier column 2 is hoisted and the embedded portion 21 of the prefabricated pier is installed into the guide groove 15 from one end face of the base cap 1. After the mortar is solidified, the bottom surface of the embedded portion 21 and the bottom surface of the guide groove 15 can be bonded to improve the connection strength between the prefabricated pier column 2 and the base cap 1. After the embedded portion 21 is installed in the guide groove 15, a gap can be left between the two sides of the embedded portion 21 and the inner sidewall of the guide groove 15 to prepare for subsequent filling with grouting material.

[0071] The steel bar unit 3 is passed through the first through-hole unit 16, the third through-hole unit 23, and the second through-hole unit 17 to secure the prefabricated pier 2 to the cap 1. Both ends of the steel bar unit 3 pass through the side wall of the cap 1 and are connected to fixing members that abut against the side wall of the cap 1.

[0072] After the steel bar unit 3 is inserted, grouting material is injected between the first through-hole unit 16, the third through-hole unit 23, the second through-hole unit 17 and the steel bar unit 3. After the grouting material solidifies, the steel bar unit 3 is combined with the base 1 and the prefabricated pier 2 into one. At the same time, the grouting material can seal the first through-hole unit 16, the third through-hole unit 23 and the second through-hole unit 17 to prevent rainwater from entering and contacting the steel bar unit 3 and causing rust and corrosion of the steel bar unit 3.

[0073] Grouting material is filled between the side wall of the embedded portion 21 and the inner wall of the guide groove 15. After the grouting material solidifies, the cap 1 and the prefabricated pier 2 are combined together to form a whole, thereby further strengthening the fixed connection between the prefabricated pier 2 and the cap 1.

[0074] The prefabricated and assembled pier column structure for bridges and its construction method in this application can have the following beneficial effects: 1. The prefabricated pier column 2 can be cast and manufactured in other places at the same time as the pedestal 1 is cast. The height of the embedded portion 21 of the prefabricated pier column 2 meets the distance between the anchorages of adjacent steel bar units 3 in the height direction. After the construction and installation between the prefabricated pier column 2 and the pedestal 1 are completed to form a unified whole, the force of the cast-in-place structure together with the pedestal 1 and the prefabricated pier column 2 is similar, which can solve the problem of insufficient seismic performance of the prefabricated and assembled pier column structure in high seismic intensity areas. 2. In the width direction, the steel bar units 3 in the embedded portion 21 of the prefabricated pier column 2 and the steel bar units 3 in the pedestal 1 are continuous steel bars. After the construction and installation between the prefabricated pier column 2 and the pedestal 1 are completed to form a unified whole, the discontinuity of the main reinforcement between the prefabricated and assembled pier column 2 and the pedestal 1 is avoided, thereby improving the bearing capacity of the prefabricated and assembled pier column structure. 3. A gap is formed between the embedded portion 21 of the prefabricated pier 2 and the guide groove 15 of the foundation 1, so high-strength grouting can be carried out from one end, which is convenient for inspection and ensures the construction quality. It can solve the technical problems of difficulty in ensuring the density of the grouting material and low grouting efficiency, and improve the durability of the structure. 4. The prefabricated pier 2 can be prefabricated in a factory or prefabrication plant, with high construction precision and effective improvement in the quality of the components. 5. The construction process can effectively reduce the impact on traffic, the scope of the construction fence can be greatly reduced, and the space occupied by existing roads can be reduced. The prefabricated pier 2 components can be arranged for transportation and hoisting at night, and the construction area can be open to traffic during the day, thereby alleviating the huge pressure brought by bridge construction on traffic to the greatest extent. 6. This method is simple and quick to construct, and the prefabricated pier 2 can be hoisted within the fence for construction, eliminating the process of scaffolding and casting the pier in a formwork, effectively shortening the construction period. 7. This application can effectively reduce the workload of on-site pouring, effectively reduce the noise, dust and sewage emissions caused by concrete pouring and maintenance, reduce the impact on the urban environment, embody the concept of green and civilized construction, have significant social benefits, and are green, environmentally friendly and sustainable.

[0075] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0076] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prefabricated pier structure for a bridge, characterized in that: The prefabricated assembled pier structure for a bridge comprises: A support platform, the support platform having corresponding first and second end faces, corresponding first and second side walls, the upper end face of the support platform having a guide groove, the extension direction of the guide groove being the same as the extension direction of the support platform and passing through at least one of the first and second end faces, the first side wall having a first through-hole unit, and the second side wall having a second through-hole unit corresponding to the position of the first through-hole unit; A prefabricated pier column, comprising an embedded portion and a column located above the embedded portion, wherein the embedded portion is provided with a third through-hole unit extending along the thickness direction thereof, and the embedded portion of the prefabricated pier column can be installed into the guide groove from one end surface of the pedestal; A steel bar unit, the steel bar unit being passed through the first through-hole unit, the third through-hole unit, and the second through-hole unit to achieve fixation between the prefabricated pier column and the cap; The guide groove includes a first partial guide groove and a second partial guide groove located below the first partial guide groove; the width of the upper end of the second partial guide groove is greater than the width of the lower end of the first partial guide groove; the embedded portion includes a first partial embedded portion and a second partial embedded portion located below the first partial embedded portion, the width of the upper end of the second partial embedded portion is greater than the width of the lower end of the first partial embedded portion; the first partial embedded portion is arranged in the first partial guide groove, and the cross-sectional shape of the first partial embedded portion corresponds to the cross-sectional shape of the first partial guide groove; the second partial embedded portion is arranged in the second partial guide groove, and the cross-sectional shape of the second partial embedded portion corresponds to the cross-sectional shape of the second partial guide groove.

2. The prefabricated pier structure for a bridge according to claim 1, characterized in that: The cross section of the first portion of the guide groove is rectangular or trapezoidal; the cross section of the second portion of the guide groove is rectangular or trapezoidal.

3. The prefabricated pier structure for a bridge according to claim 1, characterized in that: The first through-hole unit includes a top first through-hole and a bottom first through-hole, wherein the top first through-hole is located at the upper end of the platform; the bottom first through-hole is located above and close to the bottom of the guide groove; The second through-hole unit includes a top second through-hole and a bottom second through-hole, wherein the top second through-hole is located at the upper end of the support platform; the bottom second through-hole is located above the bottom of the guide groove and close to the bottom of the guide groove; The third through-hole unit includes a top third through-hole and a bottom third through-hole. The top third through-hole is located at the upper end of the first partial embedded portion, and the bottom third through-hole is located at the lower end of the second partial embedded portion.

4. The prefabricated pier structure for a bridge according to claim 1, characterized in that: Grouting material is injected between the first through-hole unit, the third through-hole unit, the second through-hole unit and the steel bar unit.

5. The prefabricated pier structure for a bridge according to claim 1, characterized in that: Both ends of the steel bar unit pass through the side walls of the pedestal respectively, and both ends of the steel bar unit are connected to fixing pieces that can support the side walls of the pedestal respectively.

6. The prefabricated pier structure for a bridge according to claim 1, characterized in that: The space between the embedded portion and the inner wall of the guide groove is filled with grouting material.

7. A construction method for a prefabricated pier structure for a bridge according to any one of claims 1 to 6, characterized in that: The following steps are involved: Tie steel bars and cast to form a cap having a guide groove on its upper end surface, the cap having corresponding first and second end surfaces, and corresponding first and second side walls, the guide groove extending in the same direction as the cap and penetrating at least one of the first and second end surfaces, forming a first through-hole unit on the first side wall, and forming a second through-hole unit on the second side wall corresponding to the position of the first through-hole unit; Transporting a prefabricated pier column to the construction site of the cap, the prefabricated pier column comprising an embedded portion and a column body located above the embedded portion, the embedded portion being provided with a third through-hole unit extending in the thickness direction thereof, hoisting the prefabricated pier column so that the embedded portion of the prefabricated pier column is installed into the guide groove from one end face of the cap; Passing a steel bar unit through the first through-hole unit, the third through-hole unit, and the second through-hole unit to achieve fixation between the prefabricated pier column and the cap, and connecting fixing members against the side walls of the cap at both ends of the steel bar unit; injecting grouting material between the first through-hole unit, the third through-hole unit, the second through-hole unit and the steel bar unit; A grouting material is filled between the side wall of the embedding portion and the inner side wall of the guide groove.

8. The construction method of the prefabricated pier structure for a bridge according to claim 7, characterized in that: The step of hoisting the prefabricated pier column and installing the embedded portion of the prefabricated pier into the guide groove from one end surface of the pedestal comprises: Laying mortar at the bottom of the guide groove of the cap; After the mortar at the bottom of the guide groove is laid, the prefabricated pier column is hoisted and the embedded portion of the prefabricated pier is installed into the guide groove from one end surface of the base.

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