A whole type arch rib pre-burying section installation positioning mechanism and installation positioning method

Abstract

This invention belongs to the technical field of positioning and installation of embedded sections for the arch ribs of intermediate piers in continuous arch steel arch bridges, specifically relating to an integral arch rib embedded section installation and positioning mechanism and method. The integral arch rib embedded section positioning and installation mechanism of this invention organically combines multiple sets of single-row steel frames, multiple embedded anchor bolts, a positioning frame, and four sets of jack supports with the integral arch rib embedded section, pier body, and arch seat. During the installation of the integral arch rib embedded section, the positioning mechanism effectively ensures the accuracy of the embedded anchor bolt positioning, thereby guaranteeing the accuracy of the arch rib embedded section installation. Simultaneously, by adopting the technical solution of this invention, the installation and positioning adjustment of the arch rib embedded section can be carried out safely and stably, greatly reducing the occurrence of damage to the embedded section components caused by direct movement using large hoisting equipment. The practical application effect is excellent.

Description

Technical Field

[0001] This invention belongs to the technical field of positioning and installation of pre-embedded sections of arch ribs in intermediate piers of continuous arch steel arch bridges, specifically involving an integral arch rib pre-embedded section installation and positioning mechanism and installation and positioning method. Background Technology

[0002] The embedded sections of the arch ribs on both sides of a continuous arch bridge are unidirectional, connecting to the outer arch rib segment only on one side. The embedded sections of the arch ribs at the middle pier of the bridge are typically integral and bidirectional, requiring connections to arch rib segments on both sides. Due to the unique structure of the arch ribs in arch bridges, the installation of the embedded sections requires extremely high precision. For integral embedded sections, due to their large size and weight, cable cranes or large cranes are usually used for hoisting. When using hoisting methods, controlling the adjustment precision of the embedded sections is difficult, necessitating the use of other auxiliary adjustment methods for final, precise adjustments during installation.

[0003] To address the positioning and installation issues of the embedded sections of the integral arch ribs in a continuous arch steel arch bridge, a positioning device and installation process suitable for the embedded sections of the integral arch ribs are needed to meet the requirements for precise installation. Summary of the Invention

[0004] To solve the problem of accurate installation of the pre-embedded section of the integral arch rib, this invention provides an installation and positioning mechanism and method for the pre-embedded section of the integral arch rib.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An integral arch rib pre-embedded section installation and positioning mechanism includes at least an integral arch rib pre-embedded section, a pier body, and an arch seat; the integral arch rib pre-embedded section is composed of two pressure plates, a base plate, and chord tubes; the two pressure plates are fixedly connected to the base plate in a relatively inwardly inclined manner; two sets of chord tubes are provided, with two chord tubes arranged in parallel in each set, and one set of chord tubes is fixedly connected to each pressure plate; the base plate is a rectangular steel plate, with a row of connecting through holes parallel to the long side on the inner side of each long side of the plate, and two rows of connecting through holes parallel to the short side on the inner side of each short side of the plate, with multiple connecting through holes evenly spaced in each row; the arch seat is placed on the pier body; the integral arch rib pre-embedded section is fixed in the arch seat by casting; characterized in that it also includes multiple pre-embedded anchor bolts and multiple sets of single-row steel frames. The system includes a positioning frame, multiple sets of jack support components, and multiple jacks matching the number of jack support components. The multiple sets of jack support components are symmetrically fixed to the bottom outer sides of two bearing plates, used for fine-tuning the position of the embedded section of the integral arch rib. The positioning frame is horizontally connected to multiple sets of single-row steel frames. Multiple embedded anchor bolts are vertically connected to the positioning frame, with their positions corresponding to the connecting through holes on the base plate. The base plate is connected to the multiple embedded anchor bolts located above the positioning frame through the connecting through holes. The multiple embedded anchor bolts, single-row steel frames, and positioning frame are embedded within the pier body. During the lowering process after the embedded section of the integral arch rib is hoisted to the installation position, the multiple jacks are placed below each set of jack support components.

[0007] Two sets of positioning frames are provided, and the two sets of positioning frames are arranged one above the other; the single-row steel frame includes two frame vertical rods and two frame horizontal rods; the two frame vertical rods are arranged vertically in parallel; the two frame horizontal rods are horizontally connected between the two frame vertical rods; the two sets of positioning frames are respectively supported on the upper and lower frame horizontal rods.

[0008] The frame's vertical and horizontal members are made of angle steel or channel steel.

[0009] The jack support components are provided in four sets, which are divided into two groups. The two jack support components in each group are fixedly connected to the bottom two outer sides of each pressure plate. Each set of jack support components includes a main support beam and a diagonal brace. The main support beam is horizontally fixedly connected to the pressure plate. The diagonal brace is inclinedly arranged below the main support beam, and its two ends are fixedly connected to the main support beam and the pressure plate, respectively.

[0010] The positioning frame includes two horizontal positioning plates and two vertical positioning plates; the two horizontal positioning plates and the two vertical positioning plates form a rectangle.

[0011] The transverse positioning plate is a rectangular steel plate with a row of through holes along the axial direction on the surface of the rectangular steel plate. These through holes correspond to the connecting through holes that are parallel to the long side of the base plate.

[0012] The longitudinal positioning plate is a rectangular steel plate with two rows of through holes along the axial direction on the surface of the rectangular steel plate. The two rows of through holes correspond to the connecting through holes that are parallel to the short side of the base plate.

[0013] A method for installing and positioning an integral arch rib embedded section, employing an integral arch rib embedded section positioning mechanism, includes the following steps.

[0014] Step 1: Pre-embed single-row steel frame and positioning frame

[0015] During the concrete construction of the pier body under the arch seat, multiple sets of single-row steel frames are pre-embedded with vertical and horizontal members. Then, the horizontal and vertical positioning plates of the two sets of positioning frames are horizontally connected to the upper and lower horizontal members respectively.

[0016] Step 2: Install pre-embedded anchor bolts

[0017] After the pre-embedded anchor bolts are vertically passed through the surfaces of the horizontal and vertical positioning plates, they are connected and fixed.

[0018] Step 3: Process the jack support components and weld them to the designed positions on the bottom outer side of each bearing plate on the pre-embedded section of the integral arch rib;

[0019] Step 4: Pouring concrete

[0020] Pour the first layer of concrete for the pier body and the arch seat; after the concrete pouring is completed, clean the concrete and other debris from the surface of the upper positioning frame and the pre-embedded anchor bolts.

[0021] Step Six: Install the integral arch rib pre-embedded section

[0022] The integral arch rib embedded section is hoisted to the installation position and slowly lowered. During the lowering process, four jacks are placed below the main beam in the four sets of jack support components. Then, the position of the integral arch rib embedded section is adjusted by manually cooperating with the jacks so that the bottom plate in the integral arch rib embedded section passes through the embedded anchor bolts. Then, the integral arch rib embedded section is fixed.

[0023] Step 8: After pouring the remaining concrete for the arch seat, the positioning and installation of the pre-embedded section of the integral arch rib is completed.

[0024] In step four, the first layer of concrete for the arch seat extends from the interface between the cast pier body and the pre-embedded bottom surface of the integral arch rib pre-embedded section.

[0025] After cleaning up the debris in step four, apply lubricating oil to the surfaces of the positioning frame and the pre-embedded anchor bolts.

[0026] Beneficial effects:

[0027] (1) The integral arch rib pre-embedded section positioning and installation mechanism of this invention is organically combined with an integral arch rib pre-embedded section, pier body, arch seat, multiple pre-embedded anchors, a single row of steel frame, positioning frame, and four sets of jack support components. During the installation of the integral arch rib pre-embedded section, the positioning mechanism effectively ensures the accuracy of the pre-embedded anchor positioning, thereby ensuring the accuracy of the integral arch rib pre-embedded section installation. At the same time, by adopting the technical solution of this invention, the installation positioning and adjustment of the integral arch rib pre-embedded section can be carried out safely and stably, greatly reducing the occurrence of damage to the pre-embedded section components caused by direct movement using large hoisting equipment, and the actual application effect is good.

[0028] (2) The positioning frame in this invention is set in two sets to completely fix the pre-embedded anchor bolts, thereby preventing the pre-embedded anchor bolts from moving during the installation and positioning of the integral arch rib pre-embedded section, thus achieving accurate positioning of the integral arch rib pre-embedded section installation.

[0029] (3) In this invention, the use of jacks for installation and positioning fine adjustment of the integral arch rib embedded section reduces the damage that may be caused to the integral embedded section components by direct movement of large hoisting equipment.

[0030] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram showing the completed installation of the integral arch rib pre-embedded section of the present invention.

[0033] Figure 2 This is a schematic diagram of the integral arch rib pre-embedded section structure of the present invention.

[0034] Figure 3 This is a schematic diagram of the planar arrangement of the positioning plate fixing steel frame of the present invention.

[0035] Figure 4 This is a schematic diagram of the elevation layout of the positioning plate fixing steel frame of the present invention.

[0036] Figure 5 This is a schematic diagram of the side arrangement of the positioning plate fixing steel frame of the present invention.

[0037] Figure 6 This is a plan view of the single-row fixed steel frame structure in this invention.

[0038] Figure 7 This is a structural diagram of the single-row fixed steel frame in this invention.

[0039] Figure 8 This is a structural diagram of the bottom plate of the integral arch rib pre-embedded section in this invention.

[0040] Figure 9 This is a structural diagram of the transverse positioning plate in this invention.

[0041] Figure 10 This is a structural diagram of the longitudinal positioning plate in this invention.

[0042] Figure 11 This is a front view of the jack support steel structure in this invention.

[0043] Figure 12 This is a cross-sectional view of the single-sided arch rib in this invention.

[0044] In the diagram: 1. Embedded section of integral arch rib; 2. Embedded anchor bolt; 3. Arch seat; 4. Single row of steel frame; 5. Horizontal positioning plate; 6. Longitudinal positioning plate; 7. Frame vertical bar; 8. Frame horizontal bar; 9. Supporting main beam; 10. Diagonal brace; 11. Embedded bottom surface of the embedded section of integral arch rib; 12. Bearing plate; 13. Bottom plate; 14. Interface between arch seat and pier body; 15. Chord tube. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1:

[0047] according to Figures 1-12The illustrated integral arch rib pre-embedded section installation and positioning mechanism includes at least an integral arch rib pre-embedded section 1, a pier body, and an arch seat 3. The integral arch rib pre-embedded section 1 is composed of two bearing plates 12, a base plate 13, and chord pipes 15. The two bearing plates 12 are fixedly connected to the base plate 13, facing each other and inclined inwards. Two sets of chord pipes 15 are provided, with two parallel chord pipes in each set, and one set of chord pipes 15 is fixedly connected to each bearing plate 12. The base plate 13 is a rectangular steel plate, with a row of parallel connecting through holes on the inner side of each long side and two rows of parallel connecting through holes on the inner side of each short side, with multiple connecting through holes evenly spaced in each row. The arch seat 3 is placed on the pier body. The integral arch rib pre-embedded section 1 is fixed within the arch seat 3 by casting. The mechanism is characterized by further including multiple pre-embedded anchor bolts 2. The system includes multiple sets of single-row steel frames 4, a positioning frame, multiple sets of jack supports, and multiple jacks matching the number of jack supports. The multiple sets of jack supports are symmetrically fixed to the bottom outer sides of two bearing plates 12 for fine-tuning the position of the integral arch rib embedded section 1. The positioning frame is horizontally connected to the multiple sets of single-row steel frames 4. Multiple embedded anchor bolts 2 are vertically connected to the positioning frame, and the positions of the embedded anchor bolts 2 correspond to the connecting through holes on the base plate 13. The base plate 13 is connected to the multiple embedded anchor bolts 2 located above the positioning frame through the connecting through holes. The multiple embedded anchor bolts 2, the single-row steel frames 4, and the positioning frame are embedded within the pier body. During the lowering process after the integral arch rib embedded section 1 is hoisted to the installation position, the multiple jacks are placed below each set of jack supports.

[0048] In practical use, during the construction of the pier body concrete below the arch seat 3, multiple single-row steel frames 4 are pre-embedded. Then, two sets of positioning frames are horizontally connected to the single-row steel frames 4, one above the other. Next, pre-embedded anchor bolts 2 are vertically passed through the transverse positioning plate 5 and the longitudinal positioning plate 6 and then connected and fixed. Subsequently, jack supports are fabricated and welded to the designed positions on the outer bottom of each bearing plate 12 on the integral arch rib pre-embedded section 1. Then, the first layer of concrete is poured between the arch seat and pier body interface 14 and the pre-embedded bottom surface 11 of the integral arch rib pre-embedded section. Soil pouring; after the concrete pouring is completed, clean the concrete and other debris on the surface of the upper positioning frame and the pre-embedded anchor bolt 2; then, hoist the integral arch rib pre-embedded section 1 to the installation position and slowly lower it. During the lowering process, place multiple jacks on the poured concrete directly below each set of jack supports. Adjust the position of the integral arch rib pre-embedded section 1 with the help of the jacks so that the bottom plate 13 in the integral arch rib pre-embedded section 1 passes through the pre-embedded anchor bolt 2, and then fix the integral arch rib pre-embedded section 1; after pouring the remaining concrete of the arch seat 3, the positioning and installation of the integral arch rib pre-embedded section 1 is completed.

[0049] The adoption of the technical solution of this invention can effectively ensure the accurate positioning of the pre-embedded anchor bolts 2, thereby ensuring the accurate installation of the integral arch rib pre-embedded section 1. At the same time, the design of multiple sets of jacks in this invention can safely and stably carry out the installation, positioning and adjustment of the integral arch rib pre-embedded section 1, reducing the damage to the components that may be caused by directly moving the integral arch rib pre-embedded section 1 with large hoisting equipment. The actual application effect is good.

[0050] Example 2:

[0051] according to Figures 1-7 The integral arch rib pre-embedded section installation and positioning mechanism shown differs from Embodiment 1 in that: two sets of positioning frames are provided, and the two sets of positioning frames are arranged vertically; the single-row steel frame 4 includes two frame vertical rods 7 and two frame horizontal rods 8; the two frame vertical rods 7 are arranged vertically in parallel; the two frame horizontal rods 8 are horizontally connected between the two frame vertical rods 7; the two sets of positioning frames are respectively supported on the upper and lower frame horizontal rods 8.

[0052] Furthermore, the frame vertical rod 7 and frame horizontal rod 8 are made of angle steel or channel steel.

[0053] In actual use, during the concrete construction of the pier body below the arch seat 3, firstly, the vertical rods 7 and horizontal rods 8 of the skeleton in multiple sets of single-row steel skeletons 4 are pre-embedded. Then, the horizontal positioning plates 5 and the longitudinal positioning plates 6 in the two sets of positioning frames are horizontally connected to the upper and lower skeleton horizontal rods 8 respectively, and then other subsequent construction operations are carried out.

[0054] In this invention, two sets of positioning frames are set up to completely fix the pre-embedded anchor bolt 2, thereby achieving precise positioning of the pre-embedded anchor bolt and laying the foundation for precise positioning of the integral arch rib pre-embedded section 1.

[0055] In this embodiment, the frame vertical rod 7 and frame horizontal rod 8 are made of angle steel or channel steel, which not only ensures the strength requirements, but also makes the materials readily available and the cost low.

[0056] Example 3:

[0057] according to Figure 1 , Figure 11 and Figure 12 The integral arch rib pre-embedded section installation and positioning mechanism shown differs from Embodiment 1 in that: four sets of jack supports are provided, and the four sets of jack supports are divided into two groups. The two jack supports in each group are fixedly connected to the bottom two outer sides of each pressure plate. Each set of jack supports includes a main support beam 9 and a diagonal brace 10. The main support beam 9 is horizontally fixedly connected to the pressure plate 12. The diagonal brace 10 is inclinedly arranged below the main support beam 9, and its two ends are fixedly connected to the main support beam 9 and the pressure plate 12, respectively.

[0058] In actual use, since the integral arch rib embedded section 1 itself cannot support the jack, the main supporting beam 9 and the diagonal brace 10 are welded on the integral arch rib embedded section 1 to facilitate the support of the jack when adjusting the integral arch rib embedded section 1.

[0059] In practical applications, both the main supporting beam 9 and the diagonal brace 10 are made of structural steel, which ensures their strength requirements while also being readily available and cost-effective.

[0060] In this embodiment, four sets of jack supports are provided, which saves costs while still fulfilling the adjustment function. In practical applications, the specific number of jack supports used is determined by the goal of ensuring stable adjustment of the integral arch rib embedded section 1.

[0061] Example 4:

[0062] according to Figures 3-5 , Figure 9 and Figure 10 The integral arch rib pre-embedded section installation and positioning mechanism shown differs from Embodiment 1 in that: the positioning frame includes two transverse positioning plates 5 and two longitudinal positioning plates 6; the two transverse positioning plates 5 and the two longitudinal positioning plates 6 form a rectangle.

[0063] In practical use, the positioning frame adopts the above technical solution, making the connection more convenient.

[0064] Example 5:

[0065] according to Figures 3-5 , Figure 9 The integral arch rib pre-embedded section installation and positioning mechanism shown differs from Embodiment 5 in that: the transverse positioning plate 5 is a rectangular steel plate with a row of through holes along the axial direction on the surface of the rectangular steel plate, which correspond to the connecting through holes parallel to the long side of the base plate 13.

[0066] In actual use, the through holes on the transverse positioning plate 5 correspond to the connecting through holes on the bottom plate 13 in the integral arch rib embedded section 1, so that the embedded anchor bolt 2 can pass through the transverse positioning plate 5 and the bottom plate 13 at the same time, so as to accurately position and install the integral arch rib embedded section 1.

[0067] In this embodiment, the length of the longitudinal positioning plate 6 is equal to the distance between the two transverse positioning plates 5.

[0068] Example 6:

[0069] According to the diagram Figures 3-5 , Figure 10The integral arch rib pre-embedded section installation and positioning mechanism shown differs from Embodiment 5 in that: the longitudinal positioning plate 6 is a rectangular steel plate with two rows of through holes along the axial direction on the surface of the rectangular steel plate, and the two rows of through holes correspond to the connecting through holes parallel to the short side of the base plate 13.

[0070] In actual use, the through holes on the longitudinal positioning plate 6 correspond to the connecting through holes on the bottom plate 13 in the integral arch rib embedded section 1, so that the embedded anchor bolt 2 can pass through the longitudinal positioning plate 6 and the bottom plate 13 at the same time, so as to accurately position and install the integral arch rib embedded section 1.

[0071] Example 7:

[0072] according to Figures 1-12 As shown, a method for installing and positioning an integral arch rib embedded section, employing an integral arch rib embedded section positioning mechanism, includes the following steps.

[0073] Step 1: Pre-embed single-row steel frame 4 and positioning frame

[0074] During the concrete construction of the pier body below the arch seat 3, multiple sets of single-row steel frames 4 are pre-embedded with the frame vertical rods 7 and the frame horizontal rods 8. Then, the horizontal positioning plates 5 and the longitudinal positioning plates 6 in the two sets of positioning frames are horizontally connected to the upper and lower frame horizontal rods 8 respectively.

[0075] Step 2: Install pre-embedded anchor bolts 2

[0076] After the pre-embedded anchor bolt 2 is vertically passed through the surface of the transverse positioning plate 5 and the longitudinal positioning plate 6, it is connected and fixed.

[0077] Step 3: Process the jack support components and weld them to the designed positions on the bottom outer side of each bearing plate 12 on the integral arch rib pre-embedded section 1;

[0078] Step 4: Pouring concrete

[0079] Pour the first layer of concrete for the pier body and the arch seat 3; after the concrete pouring is completed, clean the concrete and other debris on the surface of the upper positioning frame and the pre-embedded anchor bolts 2.

[0080] Step Six: Install the integral arch rib pre-embedded section

[0081] The integral arch rib embedded section 1 is hoisted to the installation position and slowly lowered. During the lowering process, four jacks are placed below the main beam 9 of the four sets of jack support components. Then, the position of the integral arch rib embedded section 1 is adjusted by manually cooperating with the jacks so that the bottom plate 13 in the integral arch rib embedded section 1 passes through the embedded anchor bolt 2. Then, the integral arch rib embedded section 1 is fixed.

[0082] Step 8: After pouring the remaining concrete for the arch seat 3, the positioning and installation of the integral arch rib embedded section 1 is completed.

[0083] Furthermore, in step four, the first layer of concrete for the arch seat 3 extends from the interface 14 between the arch seat and the pier body to the pre-embedded bottom surface 11 of the integral arch rib pre-embedded section.

[0084] In practical use, when installing the pre-embedded anchor bolts 2 after pre-embedding the vertical and horizontal members of the skeleton 7 and the horizontal positioning plate 5 and the longitudinal positioning plate 6, it is essential to ensure that all positioning plates are level. Pour the first layer of concrete for the pier body and the arch seat 3. The first layer of concrete for the arch seat 3 refers to the area from the interface 14 between the arch seat and the pier body to the pre-embedded bottom surface 11 of the integral arch rib pre-embedded section. At this time, the positioning frame at the top layer is exposed on the top surface of the poured concrete. Promptly clean the concrete and other debris from the surface of the top positioning frame and the pre-embedded anchor bolts 2.

[0085] During the hoisting of the integral arch rib embedded section 1 to the installation position, jacks are placed on the arch seat 3 and below the supporting main beam 9 to finely adjust the position of the integral arch rib embedded section 1. This ensures that the bottom plate 13 of the integral arch rib embedded section 1 passes through the embedded anchor bolts 2 and fits against the top positioning frame. Then, the integral arch rib embedded section is fixed with anchor bolt nuts, thus completing the installation of the entire arch rib embedded section. The entire installation process is simple, convenient, and precise in positioning.

[0086] Example 8:

[0087] according to Figures 1-12 As shown, an installation and positioning method for an integral arch rib pre-embedded section differs from Embodiment 7 in that: after cleaning up the debris in step four, lubricating oil is applied to the surfaces of the positioning frame and the pre-embedded anchor bolt 2 respectively.

[0088] In practical use, applying lubricant can effectively prevent exposed materials from rusting and make the connection smooth.

[0089] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0090] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0091] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0092] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. An integral arch rib pre-embedded section installation and positioning mechanism, comprising at least an integral arch rib pre-embedded section (1), a pier body, and an arch seat (3); the integral arch rib pre-embedded section (1) is composed of two bearing plates (12), a base plate (13), and chord pipes (15); the two bearing plates (12) are fixedly connected to the base plate (13) in a relatively inwardly inclined manner; the chord pipes (15) are arranged in two sets, with two chord pipes (15) arranged in parallel in each set, and a set of chord pipes (15) is fixedly connected to each bearing plate (12); the base plate (13) is a rectangular steel plate, with a row of connecting through holes parallel to the long side on the inner side of each long side of the plate, and two rows of connecting through holes parallel to the short side on the inner side of each short side of the plate, with multiple connecting through holes evenly spaced in each row; the arch seat (3) is placed on the pier body; the integral arch rib pre-embedded section (1) is fixed in the arch seat (3) by casting; characterized in that: It also includes multiple pre-embedded anchor bolts (2), multiple sets of single-row steel frames (4), a positioning frame, multiple sets of jack supports, and multiple jacks matching the number of jack supports; the multiple sets of jack supports are symmetrically fixedly connected to the bottom two outer sides of the two bearing plates (12) for fine-tuning of the position of the integral arch rib pre-embedded section (1) by the jacks; the positioning frame is horizontally connected to the multiple sets of single-row steel frames (4); the multiple pre-embedded anchor bolts (2) are vertically connected to the positioning frame, and the positions of the multiple pre-embedded anchor bolts (2) correspond to the connection through holes on the bottom plate (13); the bottom plate (13) is connected to the multiple pre-embedded anchor bolts (2) located above the positioning frame through the connection through holes; the multiple pre-embedded anchor bolts (2), single-row steel frames (4) and positioning frame are pre-embedded in the pier body; the multiple jacks are placed below each set of jack supports during the lowering process after the integral arch rib pre-embedded section (1) is hoisted to the installation position.

2. The integral arch rib pre-embedded section installation and positioning mechanism as described in claim 1, characterized in that: The positioning frame is provided in two sets, and the two sets of positioning frames are arranged one above the other; the single-row steel frame (4) includes two frame vertical rods (7) and two frame horizontal rods (8); the two frame vertical rods (7) are arranged vertically in parallel; the two frame horizontal rods (8) are horizontally connected between the two frame vertical rods (7); the two sets of positioning frames are respectively supported on the upper and lower frame horizontal rods (8).

3. The integral arch rib pre-embedded section installation and positioning mechanism as described in claim 2, characterized in that: The frame vertical bars (7) and frame horizontal bars (8) are made of angle steel or channel steel.

4. The integral arch rib pre-embedded section installation and positioning mechanism as described in claim 1, characterized in that: The jack support is provided in four sets, and the four sets of jack support are divided into two groups. The two jack support in each group are fixedly connected to the bottom two outer sides of each pressure plate. Each set of jack support includes a main support beam (9) and a diagonal brace (10). The main support beam (9) is fixedly connected horizontally to the pressure plate (12). The diagonal brace (10) is inclinedly arranged below the main support beam (9), and its two ends are fixedly connected to the main support beam (9) and the pressure plate (12) respectively.

5. The integral arch rib pre-embedded section installation and positioning mechanism as described in claim 1, characterized in that: The positioning frame includes two horizontal positioning plates (5) and two vertical positioning plates (6); the two horizontal positioning plates (5) and the two vertical positioning plates (6) form a rectangle.

6. The integral arch rib pre-embedded section installation and positioning mechanism as described in claim 5, characterized in that: The transverse positioning plate (5) is a rectangular steel plate with a row of through holes along the axial direction on the surface of the rectangular steel plate. These through holes correspond to the connecting through holes that are parallel to the long side of the base plate (13).

7. The integral arch rib pre-embedded section installation and positioning mechanism as described in claim 5, characterized in that: The longitudinal positioning plate (6) is a rectangular steel plate with two rows of through holes along the axial direction on the surface of the rectangular steel plate. The two rows of through holes correspond to the connecting through holes that are parallel to the short side of the bottom plate (13).

8. A method for installing and positioning an integral arch rib pre-embedded section, characterized in that: The integral arch rib pre-embedded section positioning mechanism as described in any one of claims 1-7 includes the following steps: Step 1: Pre-embed single-row steel frame (4) and positioning frame During the concrete construction of the pier body below the arch seat (3), the vertical rods (7) and horizontal rods (8) of the skeleton in multiple sets of single-row steel skeletons (4) are pre-embedded. Then, the horizontal positioning plates (5) and the longitudinal positioning plates (6) in the two sets of positioning frames are horizontally connected to the upper and lower skeleton horizontal rods (8). Step 2: Install pre-embedded anchor bolts (2) After the pre-embedded anchor bolt (2) is vertically passed through the surface of the transverse positioning plate (5) and the longitudinal positioning plate (6), it is connected and fixed. Step 3: Process the jack support components and weld them to the designed positions on the bottom outer side of each bearing plate (12) on the integral arch rib pre-embedded section (1); Step 4: Pouring concrete Pour the first layer of concrete for the pier body and the arch seat (3); after the concrete pouring is completed, clean the concrete and other debris on the surface of the positioning frame and the pre-embedded anchor bolts (2) located above. Step Six: Install the integral arch rib pre-embedded section (1) The integral arch rib embedded section (1) is hoisted to the installation position and slowly lowered. During the lowering process, four jacks are placed below the main beam (9) of the four sets of jack support components. Then, the position of the integral arch rib embedded section (1) is adjusted by manually cooperating with the jacks so that the bottom plate (13) in the integral arch rib embedded section (1) passes through the embedded anchor bolt (2). Then, the integral arch rib embedded section (1) is fixed. Step 8: After pouring the remaining concrete for the arch seat (3), the positioning and installation of the integral arch rib embedded section (1) is completed.

9. The method for installing and positioning an integral arch rib pre-embedded section as described in claim 8, characterized in that: In step four, the first layer of concrete for the arch seat (3) extends from the interface (14) between the arch seat and the pier body to the bottom surface (11) of the pre-embedded section of the integral arch rib.

10. The method for installing and positioning an integral arch rib pre-embedded section as described in claim 8, characterized in that: After cleaning up the debris in step four, apply lubricating oil to the surfaces of the positioning frame and the pre-embedded anchor bolts (2).

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