Steel structure tie beam bridge pier structure and its construction method

Abstract

The present invention discloses a steel structure tie beam bridge pier structure and a construction method thereof, which relates to the field of bridge technology. The steel structure tie beam bridge pier structure includes: a cap beam; a first pier column and a second pier column connected below the cap beam to support the cap beam, the bottom of the first pier column being located at the bottom of the cliff, and the bottom of the second pier column being located at the top of the cliff; a steel structure tie beam, a cliff anchoring unit, and a pier column anchoring unit, one end of the steel structure tie beam being connected to the first pier column through the pier column anchoring unit, and the other end of the steel structure tie beam being connected to the anchoring unit, and the anchoring unit being fixed to the side wall of the cliff. The present application can solve the problem that in mountainous bridges, the same pier needs to be provided with bridge piers at the top and bottom of a cliff with a large height difference, and tie beam connection cannot be performed, and the stability and safety of the higher piers at the bottom of the cliff cannot be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of bridges, and in particular to a steel tie beam pier structure and a construction method thereof. Background Art

[0002] Currently, expressway construction is progressing rapidly. For mountain bridges, where the same piers are located at the top and bottom of a cliff with a significant height difference, these issues are addressed through adjusting the bridge span, adding curves to the route, and even blasting and excavating the mountain. However, adjusting the bridge span and adding curves to the route will increase the bridge span, length, and route length, thereby increasing construction costs. Blasting and excavating the mountain will increase the amount of engineering work, harm ecological protection, and increase investment, running counter to the current concept of green conservation.

[0003] Under the premise that special locations cannot be avoided and both economic efficiency and safety are taken into consideration, the same bridge pier must be installed at the top and bottom of the cliff, where the height difference is large. However, the longer pier at the bottom of the cliff cannot be effectively connected to the shorter pier at the top of the cliff through a tie beam, thus failing to ensure the stability and safety of the longer pier at the bottom of the cliff. Therefore, a new pier tie beam structure is needed to solve this problem. Summary of the Invention

[0004] 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 steel structure tie beam bridge pier structure and a construction method thereof, which can solve the problem that the same pier in mountain bridges needs to be set up with bridge piers at the top and bottom of a cliff with a large height difference, and the tie beam connection cannot be performed, and the stability and safety of the higher piers at the bottom of the cliff cannot be guaranteed.

[0005] The specific technical solution of the embodiment of the present invention is:

[0006] A steel structure tie beam bridge pier structure, comprising:

[0007] cap beam;

[0008] A first pier and a second pier connected below the cap beam to support the cap beam, wherein the bottom of the first pier is located at the bottom of the cliff, and the bottom of the second pier is located at the top of the cliff;

[0009] A steel structure tie beam, a cliff anchoring unit and a pier column anchoring unit, wherein one end of the steel structure tie beam is connected to the first pier column through the pier column anchoring unit, and the other end of the steel structure tie beam is connected to the anchoring unit, and the anchoring unit is fixed to the side wall of the cliff.

[0010] Preferably, the steel structure tie beam extends in the horizontal direction, and in the height direction, the steel structure tie beam is located below the bottom of the second pier column.

[0011] Preferably, the steel structure tie beam comprises:

[0012] A main structure, wherein side walls around the main structure are made of steel plates, and the steel plates form a cavity;

[0013] a first steel plate, wherein one end of the steel plate body is welded to a side wall of the first steel plate;

[0014] The second steel plate, the other end of the steel plate body is welded to the side wall of the second steel plate.

[0015] Preferably, the pier column anchoring unit comprises:

[0016] a plurality of pre-embedded steel bars, wherein the plurality of pre-embedded steel bars are embedded in the first pier column;

[0017] The embedded steel plate is arranged on the side wall surface of the first pier column, a plurality of the embedded steel bars are welded to the embedded steel plate, and the embedded steel plate is fixedly connected to the first steel plate.

[0018] Preferably, the edge of the embedded steel plate is connected to the edge of the first steel plate by welding;

[0019] Alternatively, the embedded steel plate and the first steel plate are fixedly connected by bolts.

[0020] Preferably, the cliff anchoring unit includes: a plurality of anchor holes drilled on the side wall of the cliff; an anchor partly buried in the anchor hole; a third steel plate, wherein one end of the anchor exposed from the anchor hole is welded to the third steel plate, and the third steel plate is fixedly connected to the second steel plate.

[0021] Preferably, the anchoring piece is an anchor bolt, and a hole is formed in the third steel plate. The anchor bolt is inserted into the hole and then welded to the third steel plate.

[0022] or,

[0023] The anchor is a steel bar, and the gap between the anchor and the anchor hole is filled with grouting material. The steel bar is U-shaped, and both ends of the steel bar are respectively inserted into two anchor holes, and the middle part of the steel bar is welded to the third steel plate.

[0024] Preferably, the edge of the third steel plate is connected to the edge of the second steel plate by welding;

[0025] Alternatively, the third steel plate and the second steel plate are fixedly connected by bolts.

[0026] Preferably, the chamber is poured with self-compacting concrete; and a plurality of reinforcing members for strengthening the connection strength between the self-compacting concrete and the steel plate body are connected to the inner side wall of the steel plate body.

[0027] A construction method for a steel tie beam bridge pier structure as described above, comprising:

[0028] Using the first pier to build a support structure to the bottom elevation of the steel structure tie beam to be installed, trimming the side wall of the cliff corresponding to the cliff anchor unit to remove the loose surface layer;

[0029] Anchor bolt holes are provided on the side walls of the cliff corresponding to the steel structure tie beams to be installed;

[0030] After the anchor hole reaches the required depth, an anchor is implanted into the anchor hole, and an end of the anchor exposed from the anchor hole is welded to the third steel plate to form a cliff anchoring unit;

[0031] embedding pre-buried steel bars in the first pier column, and welding the pre-buried steel bars to the pre-buried steel plates to form a pier column anchoring unit, and then pouring concrete for the first pier column;

[0032] The steel structure tie beam is transported to the installation location, the first steel plate of the steel structure tie beam is connected to the embedded steel plate, and the second steel plate of the steel structure tie beam is connected to the third steel plate, thereby forming a steel structure tie beam pier structure.

[0033] The technical solution of the present invention has the following significant beneficial effects:

[0034] First: The steel structure tie beam pier structure and construction method thereof in the present application can connect the first pier column with the side wall of the cliff through the cliff anchoring unit so that the steel structure tie beam connects the first pier column and the side wall of the cliff to form an integral whole, thereby effectively ensuring the stability of the first pier column.

[0035] Second: The use of the steel structure tie beam pier structure and its construction method in this application can avoid adjusting the bridge span and adding curves to the route, which will lead to an increase in the bridge beam span, length, and route length, thereby solving the problem of increased project cost and investment.

[0036] Third: The steel structure tie beam pier structure in this application has the advantages of simple structure and quick and convenient construction process, which can effectively control construction costs and does not involve other difficult technical problems.

[0037] Fourth: The steel structure tie beam bridge pier structure and its construction method in this application use steel structure tie beams, which can be processed in advance in a factory or near the construction site, and then only need to be directly installed on the cliff anchor unit and the pier column anchor unit. This can speed up the construction process of the entire steel structure tie beam bridge pier structure, and can make the construction process of the steel structure tie beam bridge pier structure simpler, without the need to cast the tie beam on site outside the side wall of the cliff.

[0038] 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

[0039] 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.

[0040] Figure 1 2. It is an overall schematic diagram of the pier tie beam structure in an embodiment of the present invention;

[0041] Figure 2 This is a front view of a cliff anchoring unit in an embodiment of the present invention;

[0042] Figure 3 It is a left view of the cliff anchoring unit in an embodiment of the present invention;

[0043] Figure 4 2 is a front view of a steel structure tie beam according to an embodiment of the present invention;

[0044] Figure 5 Schematic diagram of the cross section of a steel structure tie beam in an embodiment of the present invention;

[0045] Figure 6 It is a front view of a portion of the steel tie beam pier structure in an embodiment of the present invention.

[0046] Reference numerals in the above drawings:

[0047] 1. Cliff; 11. Cliff top; 12. Cliff bottom; 13. Side wall; 2. Cap beam; 3. First pier; 4. Second pier; 5. Steel structure tie beam; 51. Steel plate; 52. First steel plate; 53. Second steel plate; 54. Reinforcement; 55. Self-compacting concrete; 6. Cliff anchor unit; 61. Anchor hole; 62. Anchor piece; 63. Third steel plate; 7. Pier anchor unit; 71. Embedded steel bar; 72. Embedded steel plate. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] In order to solve the problem that the same pier in mountainous areas needs to be set up at the top and bottom of a cliff with a large height difference, it is impossible to connect the piers with tie beams, and it is impossible to ensure the stability and safety of the higher piers at the bottom of the cliff, a steel tie beam pier structure is proposed in this application. Figure 1 This is an overall schematic diagram of the pier tie beam structure in an embodiment of the present invention. Figure 2 This is a front view of a cliff anchoring unit in an embodiment of the present invention. Figure 3 This is a left view of the cliff anchoring unit in an embodiment of the present invention. Figure 4 This is a front view of a steel structure tie beam according to an embodiment of the present invention. Figure 5Schematic diagram of the cross section of the steel structure tie beam in an embodiment of the present invention, Figure 6 FIG. 1 is a front view of a portion of the steel structure tie beam pier structure according to an embodiment of the present invention. Figures 1 to 6 As shown, the steel structure tie beam pier structure may include: a cap beam 2; a first pier column 3 and a second pier column 4 connected to the bottom of the cap beam 2 to support the cap beam 2, the bottom of the first pier column 3 is located at the bottom of the cliff 12, and the bottom of the second pier column 4 is located at the top of the cliff 11; a steel structure tie beam 5, a cliff anchoring unit 6 and a pier column anchoring unit 7, one end of the steel structure tie beam 5 is connected to the first pier column 3 through the pier column anchoring unit 7, and the other end of the steel structure tie beam 5 is connected to the anchoring unit, and the anchoring unit is fixed to the side wall 13 of the cliff 1.

[0051] Among them, such as Figure 1 As shown, the first column 3 and the second column 4 extend vertically and are generally parallel to each other. The bottom of the first column 3 is located at the cliff base 12, while the bottom of the second column 4 is located at the cliff top 11. Therefore, there is a significant height difference between the bottoms of the first column 3 and the second column 4. Horizontally, at least a portion of the sidewall 13 of the cliff 1 is located between the first column 3 and the second column 4. Due to the significant height difference between the bottoms of the first column 3 and the second column 4, the second column 4 cannot extend vertically to the position corresponding to the steel tie beam 5 connected to the first column 3. In other words, the steel tie beam 5 extends generally horizontally and is located vertically below the bottom of the second column 4. This structure leaves no place for the other end of the steel tie beam 5 to be connected and fixed. If the other end of the steel tie beam 5 cannot be fixed, the long vertical length of the first column 3 allows it to reach from the cliff top 11 to the cliff base 12, thus effectively preventing the stability of the first column 3. Therefore, the other end of the steel structure tie beam 5 is fixed to the side wall 13 of the cliff 1 through the cliff anchoring unit 6 , and the side wall 13 of the cliff 1 is used to fix the other end of the steel structure tie beam 5 .

[0052] Alternatively, the steel tie beam 5 may include: a main structure, wherein the side walls of the main structure are all made of a steel plate body 51, which forms a cavity; a first steel plate 52, wherein one end of the steel plate body 51 is welded to the side wall of the first steel plate 52; and a second steel plate 53, wherein the other end of the steel plate body 51 is welded to the side wall of the second steel plate 53. The cross-section of the steel plate body 51 of the main structure may be generally rectangular. Triangular strength reinforcements may be welded at the connection between the steel plate body 51 and the first and second steel plates 52, 53 to further enhance the connection strength between the steel plate body 51, the first and second steel plates 52, 53.

[0053] The steel structure tie beam 5 can be processed in advance in a factory or near the construction site, and then only needs to be directly installed on the cliff anchor unit 6 and the pier anchor unit 7. This can speed up the construction process of the entire steel structure tie beam bridge pier structure and make the construction process of the steel structure tie beam bridge pier structure simpler.

[0054] Further, such as Figure 5 As shown, the chamber can be poured with self-compacting concrete 55. Multiple reinforcements 54 are connected to the inner sidewalls of the steel plate 51 to strengthen the connection between the self-compacting concrete 55 and the steel plate 51. The self-compacting concrete 55 in the steel tie beam 5 can be poured after the steel tie beam 5 is installed and connected to the cliff anchor unit 6 and the pier anchor unit 7. This reduces the weight of the steel tie beam 5 and facilitates its installation. The self-compacting concrete 55 effectively increases the strength of the steel tie beam 5.

[0055] As feasible, Figure 2 and Figure 3 As shown, the cliff anchoring unit 6 may include: multiple anchor holes drilled in the sidewall 13 of the cliff 1; anchors 62 partially embedded in the anchor holes; and a third steel plate 63. The ends of the anchors 62 exposed from the anchor holes are welded to the third steel plate 63, and the third steel plate 63 is fixedly connected to the second steel plate 53. Whether the gaps between the anchors 62 and the anchor holes are filled with high-strength grouting material can be determined based on the type of anchors 62 selected. The gaps between the anchors 62 and the anchor holes can be filled with high-strength grouting material, thereby forming an integral, secure connection between the anchors 62 and the anchor holes 61 and ensuring a strong and reliable connection between the fixture and the sidewall 13 of the cliff 1. The anchor holes and corresponding anchors 62 can be distributed both vertically and horizontally to ensure strength in all directions. The anchor holes can extend in a direction substantially identical to the direction of the steel tie beam 5.

[0056] Furthermore, the anchor member 62 may be an anchor bolt. A hole is formed in the third steel plate 63. The anchor bolt is inserted into the hole and welded to the third steel plate 63. The number and distribution of the holes in the third steel plate 63 may correspond to the number of the anchor bolts. The end of the anchor bolt exposed from the anchor hole is inserted into the hole. The anchor bolt can then be welded to the third steel plate 63 from the side wall 13 of the cliff 1.

[0057] Furthermore, the anchor 62 may be a steel bar, and the gap between the anchor 62 and the anchor hole needs to be filled with grouting material. To further enhance the strength of the connection between the steel bar and the third steel plate 63, the steel bar may be U-shaped, with both ends of the steel bar inserted into the two anchor holes, and the middle of the steel bar welded to the third steel plate 63. Since the middle of the steel bar has a larger weldable area, the middle of the steel bar can be placed against one side of the third steel plate 63, and the entire contacting area can be welded, thus significantly increasing the welding area between the two.

[0058] In order to further improve the strength of the connection between the steel bar and the anchor hole, the steel bar can be selected as threaded steel bar.

[0059] As a feasible method, the third steel plate 63 is fixedly connected to the second steel plate 53 by bolts. That is, the second steel plate 53 can have multiple through-holes in the circumferential direction on the outer peripheral area of ​​the steel plate body 51, and the third steel plate 63 can also have multiple through-holes at corresponding positions. The second steel plate 53 and the third steel plate 63 are tightly attached to each other, and the bolts are passed through the through-holes and screwed into the nuts and tightened to firmly connect the second steel plate 53 and the third steel plate 63 together. This method has higher connection strength and is more reliable, but when the steel structure tie beam 5 and the cliff anchor unit 6 are installed and connected together, the through-holes of the second steel plate 53 and the third steel plate 63 need to be aligned, which is a time-consuming and laborious operation.

[0060] Alternatively, the edge of the third steel plate 63 may be connected to the edge of the second steel plate 53 by welding. This method can also basically meet the connection strength requirements. Compared with the previous method of bolt connection, this method is more convenient when installing and connecting the steel structure tie beam 5 and the cliff anchor unit 6. There is no need to align the through holes, and the two can be directly welded together.

[0061] like Figure 6 As shown, as a feasible method, the pier column anchoring unit 7 may include: a plurality of embedded steel bars 71, wherein the plurality of embedded steel bars 71 are embedded in the first pier column 3; an embedded steel plate 72, wherein the embedded steel plate 72 is arranged on the side wall surface of the first pier column 3, wherein the plurality of embedded steel bars 71 are welded to the embedded steel plates 72, and the embedded steel plates 72 are fixedly connected to the first steel plate 52. The extension direction of some embedded steel bars 71 may be substantially the same as the extension direction of the steel structure tie beam 5. The plurality of embedded steel bars 71 may be distributed and arranged in the vertical direction and the horizontal direction at the same time, so as to ensure the force strength in all directions. One side of the embedded steel plate 72 is arranged toward the end of the steel structure tie beam 5.

[0062] Furthermore, the embedded steel plate 72 is provided with openings, and the embedded steel bars 71 are inserted into the openings and welded to the embedded steel plate 72. The number and distribution of the openings in the embedded steel plate 72 can correspond to the embedded steel bars 71. One end of the embedded steel bar 71 is inserted into the opening, and then welding can be performed from the side of the embedded steel plate 72 facing away from the first pier 3, so that the embedded steel bar 71 and the embedded steel plate 72 are welded together.

[0063] Similarly, in order to further improve the strength of the connection between the embedded steel bars 71 and the embedded steel plates 72, at least part of an embedded steel bar 71 can be U-shaped, with both ends of the embedded steel bar 71 respectively buried in the first pier 3, and the middle part of the embedded steel bar 71 welded to the embedded steel plate 72.

[0064] Similarly, as a feasible method, the edge of the embedded steel plate 72 can be connected to the edge of the first steel plate 52 by welding. In other embodiments, the embedded steel plate 72 and the first steel plate 52 can also be fixedly connected by bolts. Of course, the embedded steel plate 72 and the first steel plate 52 can be connected by both welding and bolts.

[0065] This application also proposes a construction method for a steel structure tie beam pier structure, which may include the following steps:

[0066] The first pier 3 is used to build a support structure to the bottom elevation of the steel structure tie beam 5 to be installed, and the side wall 13 of the corresponding cliff 1 where the cliff anchoring unit 6 is to be built is trimmed to remove the loose surface layer.

[0067] In this step, the first pier 3 located below the steel structure tie beam 5 has been cast. At this time, the first pier 3 can be used to build a support mechanism to the bottom elevation of the steel structure tie beam 5 to be installed. The support mechanism can extend to the side wall 13 of the corresponding cliff 1 where the cliff anchor unit 6 needs to be built. The construction personnel can conveniently trim the side wall 13 of the corresponding cliff 1 where the cliff anchor unit 6 needs to be built on the support mechanism to remove the loose surface layer.

[0068] Anchor holes are opened at the side walls 13 of the cliff 1 corresponding to the steel structure tie beams 5 to be installed.

[0069] After the anchor hole reaches the required depth, the anchor piece 62 is implanted into the anchor hole, and the end of the anchor piece 62 exposed from the anchor hole is welded to the third steel plate 63 to form the cliff anchoring unit 6 .

[0070] In this step, if the anchor 62 is an anchor bolt, a hole is formed in the third steel plate 63. The anchor bolt is inserted into the hole and welded to the third steel plate 63. If the anchor 62 is a rebar, the anchor 62 is inserted into the anchor hole, and grouting material is poured into the gap between the anchor 62 and the anchor hole. If the rebar is U-shaped, the two ends of the rebar are inserted into the two anchor holes, and the middle of the rebar is welded to the third steel plate 63.

[0071] Embedded steel bars 71 are embedded in the first pier column 3 , and the embedded steel bars 71 are welded to the embedded steel plates 72 to form the pier column anchoring unit 7 , and then the concrete of the first pier column 3 is poured.

[0072] In this step, embedded steel bars 71 are embedded in the uncast first pier 3 at the same height as the steel structure tie beam 5. These embedded steel bars 71 can be tied together with the steel bars that need to be arranged in the first pier 3 to improve the connection strength between the pier column anchoring unit 7 and the first pier 3. The embedded steel bars 71 are welded to the embedded steel plate 72 to form the pier column anchoring unit 7. After that, the concrete of the first pier 3 is cast, with the embedded steel bars 71 located in the concrete and the embedded steel plate 72 exposed on the side facing the steel structure tie beam 5.

[0073] The steel structure tie beam 5 is transported to the installation location, the first steel plate 52 of the steel structure tie beam 5 is connected to the embedded steel plate 72, and the second steel plate 53 of the steel structure tie beam 5 is connected to the third steel plate 63, thereby forming a steel structure tie beam pier structure.

[0074] After the first steel plate 52 of the steel structure tie beam 5 is connected to the embedded steel plate 72 and the second steel plate 53 of the steel structure tie beam 5 is connected to the third steel plate 63 , the self-compacting concrete 55 can be poured into the cavity of the steel structure tie beam 5 .

[0075] This application may have the following advantages:

[0076] First: The steel structure tie beam pier structure and construction method thereof in the present application can connect the first pier column 3 with the side wall 13 of the cliff 1 to form an integral whole through the cliff anchoring unit 6, thereby effectively ensuring the stability of the first pier column 3.

[0077] Second: The use of the steel structure tie beam pier structure and its construction method in this application can avoid adjusting the bridge span and adding curves to the route, which will lead to an increase in the bridge beam span, length, and route length, thereby solving the problem of increased project cost and investment.

[0078] Third: The steel structure tie beam pier structure in this application has the advantages of simple structure and quick and convenient construction process, which can effectively control construction costs and does not involve other difficult technical problems.

[0079] Fourth: The steel structure tie beam pier structure and its construction method in this application use a steel structure tie beam 5, which can be processed in advance in a factory or near the construction site, and then only needs to be directly installed on the cliff anchor unit 6 and the pier column anchor unit 7. This can speed up the construction process of the entire steel structure tie beam pier structure and make the construction process of the steel structure tie beam pier structure simpler, without the need to cast the tie beam on site outside the side wall 13 of the cliff 1.

[0080] 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.

[0081] 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 steel tie beam pier structure, characterized in that: The steel structure tie beam pier structure includes: cap beam; A first pier and a second pier connected below the cap beam to support the cap beam, wherein the bottom of the first pier is located at the bottom of the cliff, and the bottom of the second pier is located at the top of the cliff; a steel structure tie beam, a cliff anchoring unit, and a pier column anchoring unit, wherein one end of the steel structure tie beam is connected to the first pier column through the pier column anchoring unit, and the other end of the steel structure tie beam is connected to the cliff anchoring unit, and the cliff anchoring unit is fixed to the side wall of the cliff; The steel structure tie beam extends in the horizontal direction, and in the height direction, the steel structure tie beam is located below the bottom of the second pier column; The steel structure tie beam comprises: a main structure, wherein the side walls of the main structure are all made of a steel plate body, wherein the steel plate body forms a cavity; a first steel plate, wherein one end of the steel plate body is welded to the side wall of the first steel plate; and a second steel plate, wherein the other end of the steel plate body is welded to the side wall of the second steel plate. The cliff anchoring unit includes: a plurality of anchor holes drilled in the side wall of the cliff; anchor pieces partially buried in the anchor holes; a third steel plate, wherein one end of the anchor piece exposed from the anchor hole is welded to the third steel plate, and the third steel plate is fixedly connected to the second steel plate; Self-compacting concrete is poured into the cavity; and a plurality of reinforcing members for strengthening the connection strength between the self-compacting concrete and the steel plate body are connected to the inner side wall of the steel plate body.

2. The steel tie beam pier structure according to claim 1, characterized in that: The pier column anchoring unit comprises: a plurality of pre-embedded steel bars, wherein the plurality of pre-embedded steel bars are embedded in the first pier column; The embedded steel plate is arranged on the side wall surface of the first pier column, a plurality of the embedded steel bars are welded to the embedded steel plate, and the embedded steel plate is fixedly connected to the first steel plate.

3. The steel tie beam pier structure according to claim 2, characterized in that: The edge of the embedded steel plate is connected to the edge of the first steel plate by welding; Alternatively, the embedded steel plate and the first steel plate are fixedly connected by bolts.

4. The steel tie beam pier structure according to claim 1, characterized in that: The anchoring piece is an anchor bolt, and a hole is opened at the third steel plate. The anchor bolt is inserted into the hole and welded to the third steel plate; or, The anchor is a steel bar, and the gap between the anchor and the anchor hole is filled with grouting material. The steel bar is U-shaped, and both ends of the steel bar are respectively inserted into two anchor holes, and the middle part of the steel bar is welded to the third steel plate.

5. The steel tie beam pier structure according to claim 1, characterized in that: The edge of the third steel plate is connected to the edge of the second steel plate by welding; Alternatively, the third steel plate and the second steel plate are fixedly connected by bolts.

6. A construction method for a steel tie beam bridge pier structure according to any one of claims 1 to 5, characterized in that: The construction method comprises: Using the first pier to build a support structure to the bottom elevation of the steel structure tie beam to be installed, trimming the side wall of the cliff corresponding to the cliff anchor unit to remove the loose surface layer; Anchor bolt holes are provided on the side walls of the cliff corresponding to the steel structure tie beams to be installed; After the anchor hole reaches the required depth, an anchor is implanted into the anchor hole, and an end of the anchor exposed from the anchor hole is welded to the third steel plate to form a cliff anchoring unit; embedding pre-buried steel bars in the first pier column, and welding the pre-buried steel bars to the pre-buried steel plates to form a pier column anchoring unit, and then pouring concrete for the first pier column; The steel structure tie beam is transported to the installation location, the first steel plate of the steel structure tie beam is connected to the embedded steel plate, and the second steel plate of the steel structure tie beam is connected to the third steel plate, thereby forming a steel structure tie beam pier structure.

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