Ancillary facility foundation adaptable to bridge deformation and construction method

Abstract

The present invention discloses an auxiliary facility foundation adaptable to bridge deformation and a construction method. The construction method includes construction preparation; during the pouring of the bridge anti-collision guardrail, pre-embed the second fastening bolt; position and install the second ear plate. During the positioning and installation process of the second ear plate, position and install the cross shaft, rotate the limit nut to lock the second fastening bolt, so that the second ear plate is connected to the bridge anti-collision guardrail as a whole; adjust the position of the second shaft body, weld and install the second limit washer to limit the displacement of the second shaft body along the bridge length direction. According to the design dimension requirements, weld and install the first limit washer on the first shaft body, and sleeve the first ear plate on the first shaft body; place the foundation chamber, install and position the foundation chamber through the first fastening bolt, rotate the limit nut to lock the first fastening bolt, so that the first ear plate is connected to the foundation chamber as a whole, and complete the construction of the auxiliary facility foundation adaptable to bridge deformation.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly to a foundation for auxiliary facilities adaptable to bridge deformation and a construction method therefor. Background Art

[0002] With the increasing development of urban transportation, the number of urban bridges is continuously increasing, and the auxiliary facilities on the bridges, such as street lamps, traffic signs, environmental monitoring instruments and other facilities and instruments, are also continuously increasing. In the current technology, such auxiliary facilities generally adopt the form of reserved concrete foundations in the bridge concrete guardrails or are installed on the unilateral bridge concrete guardrails in the form of post-added steel structures. However, with the increase in the number of various auxiliary facilities and the increasing degree of integrated arrangement of equipment on the auxiliary facilities, the weight borne by the auxiliary facility foundations and the wind loads transmitted from the intensive equipment to the foundations will also continuously increase, which may cause damage and failure of the auxiliary facility foundations.

[0003] In existing patent documents, some designs connect the concrete guardrails of adjacent two bridge spans in the form of steel structures and use the steel structures as the foundations of the auxiliary facilities. Although this method can enhance the bearing capacity of the auxiliary facility foundations, it results in rigid connection of the guardrails of the two bridge spans. When the bridges are affected by temperature gradient changes, traffic load changes, etc., relative displacement or deformation may occur between adjacent two bridge spans, causing the adjacent rigidly connected concrete guardrails to bear great stress, thereby leading to damage and failure of the auxiliary facilities and the concrete guardrail foundations. In addition, due to the fact that some high-precision traffic safety and monitoring facilities are very sensitive to deformation, excessive displacement may affect the function realization of the auxiliary facilities. Summary of the Invention

[0004] In order to solve at least one of the above technical problems, the present invention provides a foundation for auxiliary facilities adaptable to bridge deformation and a construction method therefor, and the technical solutions adopted are as follows:

[0005] The construction method for the foundation of the auxiliary facilities adaptable to bridge deformation provided by the present invention includes:

[0006] Construction preparation: Determine the specific dimensions of the cross shaft, the first ear plate, the second ear plate, the first fastening bolt, and the second fastening bolt in combination with the type of the auxiliary facilities, various load requirements, the installation distance between the left and right two bridge spans, and the installation space requirements, and pre-drill holes for each component before installation to complete the production of each component;

[0007] Embed the second fastening bolt: During the casting of the bridge anti-collision guardrail, embed the second fastening bolt;

[0008] Install the second ear plate and the cross shaft: Position and install the second ear plate. During the positioning and installation process of the second ear plate, position and install the cross shaft, rotate the limit nut to lock the second fastening bolt, and connect the second ear plate with the bridge anti-collision guardrail as a whole;

[0009] Position the first ear plate: Adjust the position of the second shaft body, weld and install the second limiting washer to restrict the displacement of the second shaft body along the length direction of the bridge body. According to the design dimension requirements, weld and install the first limiting washer on the first shaft body, and sleeved the first ear plate on the first shaft body.

[0010] Install the basic box chamber: Place the basic box chamber, perform installation positioning on the basic box chamber through the first fastening bolt, rotate the limiting nut to lock the first fastening bolt, so that the first ear plate and the basic box chamber are connected as a whole, and complete the construction of the foundation of the auxiliary facilities adaptable to the bridge deformation.

[0011] In some embodiments of the present invention, when pre-embedding the second fastening bolt, according to the pre-embedded position of the second fastening bolt, weld or bind the second fastening bolt to the anti-collision guardrail skeleton steel bars to ensure the connection strength of the second fastening bolt.

[0012] In some embodiments of the present invention, before installing the second ear plate, install a steel backing plate between the second ear plate and the bridge anti-collision guardrail.

[0013] In some embodiments of the present invention, apply epoxy resin on the side of the steel backing plate close to the concrete to provide temporary bonding force.

[0014] In some embodiments of the present invention, through bridge design calculations, the ultimate deformations Wh along the bridge width direction, Ws along the bridge height direction, and Wz along the bridge length direction of the two bridges under the factors of temperature gradient change and traffic load change are calculated, and the aperture Dh of the first ear plate, the aperture Ds of the second ear plate, the diameter dh of the first shaft body, and the diameter ds of the second shaft body are calculated through the ultimate deformation design. The calculation equations are

[0015] dh = ds;

[0016] Dh + Ds - dh - ds = Wh;

[0017] ((Lh + Dh - dh) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Ws;

[0018] ((Lh + Ds - ds) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Wz;

[0019] Wherein, Lh is the distance between the first shaft bodies on both sides of the basic box chamber.

[0020] The present invention also provides a foundation for auxiliary facilities adaptable to bridge deformation. The foundation for auxiliary facilities includes a foundation box chamber, at least two first ear plates, at least two second ear plates, and a connecting shaft. The foundation box chamber is used for installing auxiliary facilities; the first ear plates are connected to the foundation box chamber; the second ear plates are connected to the first ear plates, and the second ear plates are used for connecting bridge crash barriers; the first ear plates and the second ear plates are connected by the connecting shaft, the first ear plates and the connecting shaft are in clearance fit, and the second ear plates and the connecting shaft are in clearance fit.

[0021] In some embodiments of the present invention, the first ear plates and the second ear plates are arranged perpendicular to each other.

[0022] In some embodiments of the present invention, the connecting shaft includes a first shaft body and a second shaft body. The first shaft body is used for connecting two first ear plates, and the second shaft body is used for connecting two second ear plates.

[0023] In some embodiments of the present invention, the foundation for auxiliary facilities includes a backing plate, and the backing plate is arranged between the second ear plates and the bridge crash barrier.

[0024] In some embodiments of the present invention, the first ear plates and the second ear plates are arranged parallel to each other.

[0025] The embodiments of the present invention have at least the following beneficial effects: The foundation box chamber is connected to the bridge crash barrier through the first ear plates and the second ear plates. The first ear plates and the second ear plates are connected by the connecting shaft. The first ear plates and the connecting shaft are in clearance fit, and the first ear plates and the connecting shaft rotate relative to each other to adapt to bridge deformation; the second ear plates and the connecting shaft are in clearance fit, and the second ear plates and the connecting shaft rotate relative to each other to adapt to bridge deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 FIG. 1 is a schematic structural diagram of the first embodiment of the foundation for auxiliary facilities adaptable to bridge deformation;

[0028] Figure 2 FIG. 2 is Figure 1 a schematic structural diagram of the first embodiment provided;

[0029] Figure 3 FIG. 3 is Figure 2 a schematic structural diagram of the connecting shaft in the first embodiment provided;

[0030] Figure 4 FIG. 4 is a schematic structural diagram of the second embodiment of the foundation for auxiliary facilities adaptable to bridge deformation;

[0031] Figure 5 Structural schematic diagram of the third embodiment of the foundation of the auxiliary facility adaptable to bridge deformation.

[0032] Reference numerals: 100, foundation box chamber; 210, first ear plate; 211, first fastening bolt; 220, second ear plate; 221, second fastening bolt; 222, steel backing plate; 300, connecting shaft; 310, first shaft body; 311, first limit washer; 320, second shaft body; 321, second limit washer. Detailed implementation manners

[0033] The following will be combined with Figures 1 to 5 The embodiments of the present invention will be described in detail. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the drawings below are exemplary and are only used to explain the present invention and cannot be understood as a limitation to the present invention.

[0034] In the description of the present invention, it should be understood that if terms such as "center", "middle part", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. The features defined with "first" and "second" are used to distinguish the feature names and do not have special meanings. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] With the increasing development of urban transportation, the number of urban bridges is constantly increasing, and the number of auxiliary facilities on the bridges, such as street lamps, traffic signs, environmental monitoring instruments and other facilities and instruments, is also increasing. In the current technology, such auxiliary facilities generally adopt the form of reserving concrete foundations in the bridge concrete guardrails or installing them on the unilateral bridge concrete guardrails in the form of post-added steel structures. However, with the increase in the number of various auxiliary facilities and the increasing degree of integrated arrangement of the equipment on the auxiliary facilities, the weight borne by the auxiliary facility foundations and the wind loads transmitted from the intensive equipment to the foundations will also continue to grow, which may cause damage and failure of the auxiliary facility foundations.

[0037] In some existing patent documents, there are some designs that connect the concrete guardrails of adjacent two bridges in the form of steel structures and use the steel structures as the foundations of the auxiliary facilities. Although this method can enhance the bearing capacity of the auxiliary facility foundations, it results in the rigid connection of the guardrails of the two bridges. When the bridges are affected by factors such as temperature gradient changes and traffic load changes, relative displacement or deformation may occur between the adjacent two bridges, causing the adjacent rigidly connected concrete guardrails to bear extremely high stresses, thereby leading to damage and failure of the auxiliary facilities and the concrete guardrail foundations. In addition, since some high-precision traffic safety and monitoring facilities are very sensitive to deformation, excessive displacement may affect the function realization of the auxiliary facilities.

[0038] The present invention relates to an auxiliary facility foundation adaptable to bridge deformation. The auxiliary facility foundation includes a foundation chamber 100, at least two first ear plates 210, at least two second ear plates 220, and a connecting shaft 300. The foundation chamber 100 is used for installing auxiliary facilities; the first ear plates 210 are connected to the foundation chamber 100; the second ear plates 220 are connected to the first ear plates 210, and the second ear plates 220 are used for connecting to the bridge anti-collision guardrails; the first ear plates 210 and the second ear plates 220 are connected by the connecting shaft 300. The first ear plates 210 and the connecting shaft 300 are in clearance fit, and the second ear plates 220 and the connecting shaft 300 are in clearance fit. The foundation chamber 100 is connected to the bridge anti-collision guardrail through the first ear plates 210 and the second ear plates 220. The first ear plates 210 and the second ear plates 220 are connected by the connecting shaft 300. The first ear plates 210 and the connecting shaft 300 are in clearance fit, and the first ear plates 210 and the connecting shaft 300 rotate relative to each other to adapt to bridge deformation; the second ear plates 220 and the connecting shaft 300 are in clearance fit, and the second ear plates 220 and the connecting shaft 300 rotate relative to each other to adapt to bridge deformation.

[0039] In some embodiments, the foundation chamber 100 is welded by steel plates, and fixing hole positions for connecting the first ear plates 210 are reserved on the steel plates on both sides of the foundation chamber 100. It can be understood that installation hole positions are reserved on the top of the foundation chamber 100 according to different types of auxiliary facilities and the dimensions of the base flanges, and installation operation spaces are reserved during the welding of the chamber.

[0040] Further, the auxiliary facility foundation includes a backing plate disposed between the second ear plate 220 and the bridge anti-collision guardrail. It can be understood that arranging the backing plate between the second ear plate 220 and the bridge anti-collision guardrail can play a cushioning role and avoid direct contact between the second ear plate 220 and the bridge guardrail concrete. In some embodiments, the backing plate is a steel backing plate 222.

[0041] Further, one side of the backing plate in contact with the bridge anti-collision guardrail is covered with an adhesive coating. It can be understood that the adhesive coating can provide adhesive force for the connection between the backing plate and the bridge anti-collision guardrail concrete, which is beneficial to improving the integrity of the connection between the second ear plate 220 and the bridge anti-collision guardrail. In some embodiments, the adhesive coating is made of epoxy resin material and is applied to one side of the backing plate in contact with the anti-collision guardrail.

[0042] In some embodiments, the first ear plate 210 and the foundation chamber 100 are connected by first fastening bolts 211. Referring to the drawings, each first ear plate 210 is connected to the side wall of the foundation chamber 100 by at least two first fastening bolts 211, and the first fastening bolts 211 are tightened by limit nuts. Rotating the limit nuts provides a tightening torque to fix the first ear plate 210.

[0043] In some embodiments, the second ear plate 220 and the bridge anti-collision guardrail are connected by second fastening bolts 221. Referring to the drawings, each second ear plate 220 is fixed to the bridge anti-collision guardrail by at least two second fastening bolts 221. Specifically, the second fastening bolts 221 are embedded into the bridge anti-collision guardrail by welding or tying with the anti-collision guardrail skeleton steel bars during the pouring of the bridge anti-collision guardrail. It can be understood that during construction on an existing bridge foundation, the second fastening bolts 221 can also be implanted by drilling holes in the anti-collision guardrail, and attention should be paid to avoiding the guardrail steel bars when drilling.

[0044] Embodiment 1:

[0045] Combined with Figures 1 to 2 It can be understood that the first ear plate 210 and the second ear plate 220 are arranged perpendicular to each other. Specifically, the first ear plate 210 is a horizontal ear plate, and two horizontal ear plates are arranged on each of the two sides where the foundation chamber 100 is connected to the bridge anti-collision guardrail; the second ear plate 220 is a vertical ear plate.

[0046] Referring to the drawings, the connecting shaft 300 is a cross shaft, and the cross shaft includes a first shaft body 310 and a second shaft body 320. The first shaft body 310 is used to connect two first ear plates 210, and the second shaft body 320 is used to connect two second ear plates 220. The first shaft body 310 and the second shaft body 320 are arranged perpendicular to each other. The cross shaft is integrally formed with high-strength steel to improve the connection strength of the cross shaft.

[0047] Further, the cross shaft includes a first limiting washer 311 sleeved outside the first shaft body 310, and the first limiting washer 311 is used to limit the axial displacement of the first shaft body 310. Combining Figure 1 , the first limiting washer 311 is arranged on the inner sides opposite to each other of the first ear plates 210. It can be understood that the first limiting washer 311 can position the first shaft body 310 and prevent the first shaft body 310 from shifting along its own axial direction. Specifically, the first limiting washer 311 is fixed to the first shaft body 310 by welding.

[0048] Further, the cross shaft includes a second limiting washer 321 sleeved outside the second shaft body 320, and the second limiting washer 321 is used to limit the axial displacement of the second shaft body 320. Combining Figure 2 , the second limiting washer 321 is arranged on the outer sides opposite to each other of the second ear plates 220. It can be understood that the second limiting washer 321 is fixed to the second shaft body 320 by welding.

[0049] It can be understood that the cross shaft can ensure that the attached infrastructure rotates freely along the axial direction of the first shaft body 310 and rotates freely along the axial direction of the second shaft body 320, releasing the bending moments and secondary internal forces caused by factors such as temperature gradient changes and traffic load changes in the two bridge decks. By adjusting the aperture of the connection hole of the first ear plate 210, the ability of the attached facility foundation to adapt to the deformation in the length direction of the bridge body can be adjusted; by adjusting the aperture of the connection hole of the second ear plate 220, the ability of the attached facility foundation to adapt to the deformation in the height direction of the bridge body can be adjusted.

[0050] Embodiment 2:

[0051] Combining Figure 4 It can be understood that the first ear plates 210 and the second ear plates 220 are arranged parallel to each other. Specifically, both the first ear plates 210 and the second ear plates 220 are transverse ear plates. This embodiment is applicable to the situation where the deformation of the bridge along the length direction of the bridge body is much greater than the deformation in other directions. At this time, the first ear plates 210 move relative to the second ear plates 220 along the length direction of the bridge body, the first ear plates 210 rotate relative to the connecting shaft 300, and the second ear plates 220 rotate relative to the connecting shaft 300 to adapt to the deformation of the bridge body. It can be understood that by adjusting the aperture sizes of the connection holes on the first ear plates 210 and the second ear plates 220, the ability of the attached facility foundation to adapt to the deformation of the bridge along the length direction of the bridge body can be adjusted.

[0052] Embodiment 3:

[0053] Combining Figure 5It can be understood that the first ear plate 210 and the second ear plate 220 are arranged in parallel with each other. Specifically, both the first ear plate 210 and the second ear plate 220 are vertical ear plates. In this embodiment, when the deformation of the bridge in the height direction of the bridge body is much greater than that in other directions, the first ear plate 210 moves relative to the second ear plate 220 in the height direction of the bridge body, and the first ear plate 210 rotates relative to the connecting shaft 300. The second ear plate 220 rotates relative to the connecting shaft 300 to adapt to the deformation of the bridge body. It can be understood that by adjusting the aperture sizes of the connecting holes on the first ear plate 210 and the second ear plate 220, the ability of the auxiliary facility foundation to adapt to the deformation of the bridge in the height direction of the bridge body can be adjusted.

[0054] The present invention also relates to a construction method for an auxiliary facility foundation adaptable to bridge deformation, specifically including:

[0055] Construction preparation: Determine the specific dimensions of the cross shaft, the first ear plate 210, the second ear plate 220, the first fastening bolt 211, and the second fastening bolt 221 in combination with the type of auxiliary facilities, various load requirements, the installation distance between the left and right bridge decks, and the installation control requirements, and pre-drill holes in each component before installation to complete the production of each component;

[0056] Embed the second fastening bolt 221: During the casting of the bridge anti-collision guardrail, embed the second fastening bolt 221;

[0057] Install the second ear plate 220 and the cross shaft: Position and install the second ear plate 220. During the positioning and installation process of the second ear plate 220, position and install the cross shaft, and rotate the limit nut to lock the second fastening bolt 221 to connect the second ear plate 220 with the bridge anti-collision guardrail as a whole;

[0058] Position the first ear plate 210: Adjust the position of the second shaft body 320, weld and install the second limit washer 321 to limit the displacement of the second shaft body 320 in the length direction of the bridge body. According to the design dimension requirements, weld and install the first limit washer 311 on the first shaft body 310, and sleeved the first ear plate 210 on the first shaft body 310;

[0059] Install the foundation chamber 100: Place the foundation chamber 100, install and position the foundation chamber 100 through the first fastening bolt 211, and rotate the limit nut to lock the first fastening bolt 211 to connect the first ear plate 210 with the foundation chamber 100 as a whole, completing the construction of the auxiliary facility foundation adaptable to bridge deformation.

[0060] Further, when embedding the second fastening bolt 221, according to the embedding position of the second fastening bolt 221, weld or tie the second fastening bolt 221 to the anti-collision guardrail framework steel bars to ensure the connection strength of the second fastening bolt 221. It can be understood that generally, for the installation of auxiliary facilities, the method of reserving a concrete foundation in the bridge concrete guardrail is adopted. The second fastening bolt 221 is embedded into the concrete during the pouring of the bridge anti-collision guardrail, and the second fastening bolt 221 and the anti-collision guardrail framework steel bars are fixed by welding or tying to ensure the connection strength and stability of the second fastening bolt 221.

[0061] It can be understood that in other embodiments, such as in the case of adding auxiliary facilities on an existing bridge foundation, holes can be drilled in the bridge anti-collision guardrail to implant the second fastening bolt 221 to realize the connection between the second ear plate 220 and the bridge anti-collision guardrail. It should be noted that when drilling holes, avoid the anti-collision guardrail framework steel bars.

[0062] Further, before installing the second ear plate 220, install a steel backing plate 222 between the second ear plate 220 and the bridge anti-collision guardrail.

[0063] Further, apply epoxy resin on the side of the steel backing plate 222 close to the concrete to provide temporary bonding force.

[0064] Further, determining the specific dimensions of the cross shaft, the first ear plate 210, the second ear plate 220, the first fastening bolt 211, and the second fastening bolt 221 specifically includes:

[0065] Determine the dimensions and steel plate thicknesses of each component according to the type of auxiliary facilities and various load requirements. Among them, the total dimensions designed for each component do not exceed the initial design distance Lb between the outer sides of the two bridge anti-collision guardrails, and ensure sufficient installation operation space;

[0066] Through bridge design calculations, determine the maximum deformations Wh, Ws, and Wz of the two bridges in the bridge width direction, bridge height direction, and bridge length direction under factors such as temperature gradient changes and traffic load changes;

[0067] Let the aperture of the connection hole of the first ear plate 210 be Dh, the aperture of the connection hole of the second ear plate 220 be Ds, the shaft diameter of the first shaft body 310 be dh, and the shaft diameter of the second shaft body 320 be ds. The shaft-hole clearance Eh of the first ear plate 210 can be calculated as Eh = 1 / 2(Dh - dh), and the shaft-hole clearance Es of the second ear plate 220 can be calculated as Es = 1 / 2(Ds - ds);

[0068] Let the distance between the first shafts 310 on both sides of the basic box chamber 100 be Lh, and the distance between the second shaft 320 and the outer side of the anti-collision guardrail be Ls. When the first shaft 310 and the second shaft 320 are respectively in the same vertical plane, that is, the cross shafts on both sides are parallel to each other and parallel to the outer side of the anti-collision guardrail, Lb = Lh + 2Ls is satisfied. Among them, Lh needs to meet the dimensional requirements for installing the basic box chamber 100 and the first ear plate 210, and Ls needs to meet the dimensional requirements for installing the steel backing plate 222 and the second ear plate 220;

[0069] When the two bridges undergo displacement in the bridge width direction, the relative deformation that the auxiliary facility foundation can adapt to is 2(Eh + Es) ≤ Wh, and the ultimate deformation that the auxiliary facility foundation can adapt to in the bridge width direction is 2(Eh + Es) = Dh + Ds - dh - ds = Wh;

[0070] When the two bridges undergo displacement in the bridge height direction, the relative deformation that the auxiliary facility foundation can adapt to is ((Lh + 2Eh) 2 -(Lh - 2(Eh + Es)) 2 ) 1 / 2 ≤ Ws, and the ultimate deformation that the auxiliary facility foundation can adapt to in the bridge height direction is ((Lh + Dh - dh) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Ws;

[0071] When the two bridges undergo displacement in the bridge length direction, the relative deformation that the auxiliary facility foundation can adapt to is ((Lh + 2Es) 2 -(Lh - 2(Eh + Es)) 2 ) 1 / 2 ≤ Wz, and the ultimate deformation that the auxiliary facility foundation can adapt to in the bridge length direction is ((Lh + Ds - ds) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Wz;

[0072] To ensure the quality of the cross shaft, the shaft diameters are generally set to be equal when machining the cross shaft, that is, dh = ds, and Dh, Ds, dh, and ds are determined by solving based on the above ultimate deformation equations;

[0073] Check the bearing capacity of the dimensions of each component. If the requirements are met, determine the dimensions of each component. If the requirements are not met, re-determine Lh and Ls for subsequent checking and verification.

[0074] The following uses a specific embodiment to describe in detail the content according to the present invention. It should be noted that the following description is only an exemplary illustration and not a specific limitation of the invention.

[0075] Construction method for the foundation of auxiliary facilities adaptable to bridge deformation, specifically including:

[0076] Construction preparation: Determine the specific dimensions of the cross shaft, the first ear plate 210, the second ear plate 220, the first fastening bolt 211, and the second fastening bolt 221 in combination with the type of auxiliary facilities, various load requirements, the installation distance between the left and right bridge decks, and the installation space requirements. Pre-drill holes in each component before installation to complete the production of each component;

[0077] Embed the second fastening bolt 221: During the casting of the bridge anti-collision guardrail, embed the second fastening bolt 221. According to the embedded position of the second fastening bolt 221, weld or tie the second fastening bolt 221 to the anti-collision guardrail skeleton steel bars to ensure the connection strength of the second fastening bolt 221;

[0078] Install the second ear plate 220 and the cross shaft: Position and install the steel backing plate 222 and the second ear plate 220 in sequence. Apply epoxy resin on the side of the steel backing plate 222 close to the concrete to provide temporary adhesion. During the positioning and installation of the second ear plate 220, position and install the cross shaft, and rotate the limit nut to lock the second fastening bolt 221 to connect the second ear plate 220 with the bridge anti-collision guardrail as a whole;

[0079] Position the first ear plate 210: Adjust the position of the second shaft body 320, weld and install the second limit washer 321 to limit the displacement of the second shaft body 320 along the bridge length direction. According to the design dimension requirements, weld and install the first limit washer 311 on the first shaft body 310, and sleeved the first ear plate 210 on the first shaft body 310;

[0080] Install the foundation chamber 100: Place the foundation chamber 100, install and position the foundation chamber 100 through the first fastening bolt 211, and rotate the limit nut to lock the first fastening bolt 211 to connect the first ear plate 210 with the foundation chamber 100 as a whole, thus completing the construction of the foundation of the auxiliary facilities adaptable to bridge deformation.

[0081] In the description of this specification, if there are descriptions of reference terms such as "one embodiment", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", it means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0082] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. Construction method for foundation of auxiliary facilities adaptable to bridge deformation, characterized in that, The construction method includes: Construction preparation: Determine the specific dimensions of the cross shaft, the first ear plate, the second ear plate, the first fastening bolt, and the second fastening bolt in combination with the type of auxiliary facilities, various load requirements, the installation distance between the left and right bridge decks, and the installation control requirements. Before installation, pre-drill holes in each component to complete the production of each component. Embed the second fastening bolt: During the pouring of the bridge anti-collision guardrail, embed the second fastening bolt. Install the second ear plate and the cross shaft: Position and install the second ear plate. During the positioning and installation process of the second ear plate, position and install the cross shaft, and rotate the limit nut to lock the second fastening bolt to connect the second ear plate with the bridge anti-collision guardrail as a whole. Position the first ear plate: Adjust the position of the second shaft body, weld and install the second limit washer to limit the displacement of the second shaft body along the length direction of the bridge body. According to the design dimension requirements, weld and install the first limit washer on the first shaft body, and sleeved the first ear plate on the first shaft body. Install the foundation box chamber: Place the foundation box chamber, and position and install the foundation box chamber through the first fastening bolt. Rotate the limit nut to lock the first fastening bolt to connect the first ear plate with the foundation box chamber as a whole, and complete the construction of the foundation of the auxiliary facilities adaptable to the bridge deformation.

2. The construction method of the auxiliary facility foundation adaptable to bridge deformation according to claim 1, characterized in that: When embedding the second fastening bolt, weld or tie the second fastening bolt to the anti-collision guardrail skeleton steel bars according to the embedding position of the second fastening bolt to ensure the connection strength of the second fastening bolt.

3. The construction method of the auxiliary facility foundation adaptable to bridge deformation according to claim 1, characterized in that: Before installing the second ear plate, install a steel backing plate between the second ear plate and the bridge anti-collision guardrail.

4. The construction method of the foundation of the auxiliary facility adaptable to the deformation of the bridge according to claim 3, characterized in that: Apply epoxy resin on the side of the steel backing plate close to the concrete to provide temporary bonding force.

5. The construction method of the foundation of the accessory facility adaptable to the deformation of the bridge according to claim 1, characterized in that: Through bridge design, calculate the ultimate deformations Wh of the bridge along the width direction of the bridge, Ws along the height direction of the bridge, and Wz along the length direction of the bridge under the factors of temperature gradient change and traffic load change of the two bridge decks, and calculate the aperture Dh of the first ear plate, the aperture Ds of the second ear plate, the diameter dh of the first shaft body, and the diameter ds of the second shaft body through the ultimate deformation design. The calculation equations are dh = ds; Dh + Ds - dh - ds = Wh; ((Lh+Dh-dh) 2 -(Lh-(Dh+Ds-dh-ds)) 2 ) 1 / 2 =Ws; ((Lh + Ds - ds) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Wz; Wherein, Lh is the distance between the first shaft bodies on both sides of the foundation box chamber.

6. Ancillary facility foundation adaptable to bridge deformation, characterized in that, The foundation of the auxiliary facilities is constructed by using the construction method described in any one of claims 1 to 4. The foundation of the auxiliary facilities includes: A foundation box chamber for installing auxiliary facilities; At least two first ear plates connected to the foundation box chamber; At least two second ear plates connected to the first ear plates. The first ear plates and the second ear plates are arranged perpendicular to each other, and the second ear plates are used to connect the bridge anti-collision guardrails; A connecting shaft. The first ear plates and the second ear plates are connected by the connecting shaft. The first ear plates and the connecting shaft are in clearance fit, and the second ear plates and the connecting shaft are in clearance fit. The connecting shaft includes a first shaft body and a second shaft body, and the first shaft body and the second shaft body are arranged perpendicular to each other. The first shaft body is used to connect two first ear plates, and the second shaft body is used to connect two second ear plates. Among them, through bridge design, the ultimate deformations Wh along the bridge width direction, Ws along the bridge height direction, and Wz along the bridge length direction of the two bridges under the influence of temperature gradient changes and traffic load changes are calculated, and through the ultimate deformation design, the aperture Dh of the first ear plate, the aperture Ds of the second ear plate, the diameter dh of the first shaft body, and the diameter ds of the second shaft body are respectively dh = ds; Dh + Ds - dh - ds = Wh; ((Lh + Dh - dh) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Ws; ((Lh + Ds - ds) 2 -(Lh - (Dh + Ds - dh - ds)) 2 ) 1 / 2 = Wz; Among them, Lh is the distance between the first shaft bodies on both sides of the foundation box chamber.

7. The foundation of the auxiliary facility adaptable to the deformation of the bridge according to claim 6, characterized in that: The foundation of the auxiliary facility includes a backing plate, and the backing plate is arranged between the second ear plate and the bridge anti-collision guardrail.

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