Construction method of embedded arch foot of non-thrust arch bridge

Abstract

The present application relates to a kind of no thrust arch bridge arch foot pre-embedded construction method, comprising the following steps: bearing platform leveling pad construction, ground foot frame field fixation, ground foot pad construction, fixed end field installation, inclined brace fixed frame field installation, bearing platform pre-embedded pad construction, pre-embedded arch rib hoisting construction.The beneficial effects of the present application are: ground foot frame, ground foot pad can be applied to the installation of all arch foot embedded parts, avoiding the process of separately making various types of support;Using the pre-embedded mode of ground foot frame, fixed end and fixed frame to replace pre-embedded support improves the installation accuracy of embedded parts;Three-layer pad pouring method is used to embed and fix ground foot frame, fixed end and fixed frame, improving the stability during installation of embedded parts;Arch rib high-lift frame and arch rib tripod can be dismantled and recycled.

Description

TECHNICAL FIELD

[0001] The present application is suitable for the construction of the arch foot embedded part of the arch bridge, and particularly suitable for the construction of the arch foot embedded part of the non-thrust arch bridge. BACKGROUND

[0002] The non-thrust arch bridge is a structural form of the tied arch bridge, which is generally composed of arch ribs, diagonal braces or tie rods, pull rods or suspender rods, etc. The horizontal thrust at the arch end is jointly borne by the diagonal braces and the pull rods, so that the horizontal thrust is not generated at the arch end support. This kind of bridge type combines the advantages of arch and beam, and plays the maximum potential of itself. Therefore, the construction of the arch ribs, diagonal braces and pull rods of this kind of bridge type is the most important, and the corresponding pre-embedded part needs to be constructed before the construction. The current construction of the arch foot embedded part of the arch bridge mostly adopts the pre-embedded support method, but the pre-embedded support method cannot guarantee the accurate positioning of the arch foot embedded part to a great extent.

[0003] At present, the technical patents related to the arch foot pre-embedding of the non-thrust arch bridge mainly include: CN114214917A steel pipe concrete tied arch bridge and construction method, CN114855616A steel arch bridge arch foot pre-embedded section installation positioning method, CN212428131U tied arch bridge arch foot embedded part positioning device, and CN305422490S non-thrust space steel arch bridge, etc. However, the above methods separately install the corresponding pre-embedded parts of the arch ribs, diagonal braces and pull rods, and the corresponding installation support system also needs to be separately made, which cannot share the same parts and has strong independence. This will reduce the efficiency of making and installing the pre-embedded support, and further affect the construction efficiency of the pre-embedded part on site. Therefore, there is an urgent need for a method which can not only guarantee the accurate installation of the corresponding pre-embedded parts of the arch ribs, diagonal braces and pull rods, but also be shared for the positioning and installation of the corresponding pre-embedded parts of the arch ribs, diagonal braces and pull rods. SUMMARY

[0004] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a non-thrust arch bridge arch foot pre-embedding construction method

[0005] The non-thrust arch bridge arch foot pre-embedding construction method comprises the following steps:

[0006] Step one, construction of the pile cap leveling pad: the pile head of the pile foundation under the pile cap is roughened, and the leveling pad is formed after the concrete pouring construction of the bottom layer of the pile cap is leveled, and the thickness of the leveling pad is 0.5m-1.0m;

[0007] Step two, on-site fixing of the ground frame grid: install the ground frame grid, and then adjust and fix the flatness of the frame grid disc through the fixing bolts and adjusting bolts; complete the installation operation of the ground frame grid corresponding to the fixed end and the diagonal brace fixing frame;

[0008] Step three, construction of the foot pad: the foot frame is erected around the periphery and concrete is poured to form a plurality of foot pads;

[0009] Step four, field installation of the fixed end: ear plates are welded to the fixed end, the fixed end is installed on the foot frame, and the flatness of the fixed end is adjusted by the fixing bolt and the adjusting bolt;

[0010] Step five, field installation of the diagonal bracing fixing frame: the top end and the lower part of the diagonal bracing fixing frame are respectively installed with the crown beam and the connecting ear plate, and the diagonal bracing fixing frame is installed on the foot frame;

[0011] Step six, construction of the pre-buried pad of the bearing platform: the pre-buried pad is constructed on the flat pad;

[0012] Step seven, hoisting construction of the pre-buried arch rib: the arch rib high rack is erected on the pre-buried pad, and then the pre-buried segment one of the arch rib is installed; the straight leg of the arch rib is installed on the fixed end of the arch leg, the arch rib tripod is erected on the pre-buried pad, and the pre-buried segment two of the arch rib is installed on the arch rib tripod and the straight leg of the arch rib, and then the arch rib high rack and the arch rib tripod are removed; finally, the diagonal bracing pre-buried part is installed on the diagonal bracing fixing frame, and the tie rod pre-buried part is installed on the fixed end of the tie rod.

[0013] As a preferred, in step two: the foot frame includes the foot adjusting screw, the frame disc and the L-shaped adjusting screw, the frame disc is obtained by cutting the profiled steel plate, and the frame disc is provided with bolt holes around the periphery; the position of the foot adjusting screw is positioned on the frame disc, and then the foot adjusting screw is vertically welded on the frame disc through the stable inclined rod; the L-shaped adjusting screw includes the vertical adjusting screw, the fixed base and the stable rib plate, the fixed base is provided with a nail hole, the fixed base is vertically welded with the vertical adjusting screw, and the stable rib plate is arranged on both sides of the fixed base; the foot frame is fixed to the leveling pad by shooting nails through the nail holes.

[0014] As a preferred, in step two: the fixed end includes the tie rod fixed end, the arch rib fixed end and the arch leg fixed end, the fixed end is connected to the foot adjusting screw of the foot frame through the ear plate, and the fixed screw and the adjusting screw are further arranged between the ear plate and the foot adjusting screw.

[0015] As a preferred, in step five: the diagonal bracing fixing frame includes the front leg steel frame and the rear leg steel frame, the front leg steel frame and the rear leg steel frame are connected to form an integral body through the connecting beam and the cross beam, the top end of the front leg steel frame and the rear leg steel frame is provided with the crown beam, and the crown beam of the top end of the rear leg steel frame is provided with the wedge-shaped block above.

[0016] As a preferred, in step six: the upper surface of the pre-buried pad is higher than the lower part of the fixed end and the diagonal bracing fixing frame.

[0017] As preferred, the method is characterized in that: according to the section position, the steps two to five are repeatedly performed until the installation of the foot frame, the foot pad, the fixed end and the inclined support fixing frame on all sections is completed, and then the construction of the embedded pad in step six is performed.

[0018] As preferred, in step seven: the arch rib high-low frame includes a high steel frame and a low steel frame, the high steel frame and the low steel frame are connected through a connecting beam, and the top of the high steel frame and the low steel frame are provided with wedge blocks through a crown beam, and the posture of the arch rib embedded section one is adjusted through the wedge blocks.

[0019] The arch rib tripod includes an inclined steel frame and a straight steel frame, the top of the straight steel frame is also provided with a crown beam and a wedge block, the posture of the arch rib embedded section two is adjusted through the wedge block, and the inclined steel frame is arranged on the side of the straight steel frame away from the arch rib embedded section one; the arch rib high-low frame and the arch rib tripod are arranged between the arch rib fixed end and the arch leg fixed end.

[0020] After the installation of the arch rib embedded section two is completed, the wedge blocks on the arch rib high-low frame and the arch rib tripod are removed, and then the arch rib high-low frame and the arch rib tripod are synchronously removed.

[0021] As preferred: according to the section position, the construction of step seven is repeatedly performed until the installation of the arch rib embedded section one, the arch rib straight leg, the arch rib embedded section two, the inclined support embedded part and the pull rod embedded part on all sections is completed, and the construction of the arch foot embedded system of the thrust-free arch bridge is ended.

[0022] A thrust-free arch bridge arch foot embedded structure obtained according to any of the above methods.

[0023] The beneficial effects of the present application are:

[0024] 1) Compared with the current prior art scheme, the foot frame, the foot pad and the like developed by the present application can be applied to the installation of all arch foot embedded parts, avoiding the process of separately manufacturing various supports, and improving the construction efficiency.

[0025] 2) Compared with the current prior art scheme, the present application adopts the embedded mode of the foot frame, the fixed end and the fixing frame to replace the embedded support, improves the installation accuracy of the embedded part, and can timely adjust the accuracy change of the embedded part during installation.

[0026] 3) Compared with the current prior art scheme, the present application adopts the three-layer pad pouring mode to embed and fix the foot frame, the fixed end and the fixing frame, improves the stability during installation of the embedded part, and ensures the construction effect.

[0027] 4) Compared with the current prior art scheme, the arch rib high-low frame and the arch rib tripod of the present application can be removed and recycled, reducing the installation cost of the arch rib, so the present application also has certain economic effect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic view of a construction cross section of a bearing platform leveling pad;

[0029] Figure 2 is a schematic view of a construction cross section of a footing frame field fixation;

[0030] Figure 3 is a schematic view of a footing frame plan;

[0031] Figure 4 is a schematic view of a footing frame side view;

[0032] Figure 5 is a schematic view of a construction cross section of a footing pad;

[0033] Figure 6 is a schematic view of a footing frame side view after a footing pad construction;

[0034] Figure 7 is a schematic view of a construction cross section of a fixed end field installation;

[0035] Figure 8 is a schematic view of a construction cross section of a diagonal brace fixation frame field installation;

[0036] Figure 9 is a schematic view of a footing frame, fixed end, diagonal brace fixation frame installation completion plan of all sections;

[0037] Figure 10 is a schematic view of a construction cross section of a bearing platform pre-embedded pad;

[0038] Figure 11 is a schematic view of a construction cross section of an arch rib high-low frame installation;

[0039] Figure 12 is a schematic view of a construction cross section of an arch rib pre-embedded section 1 installation;

[0040] Figure 13 is a schematic view of a construction cross section of an arch rib straight leg installation;

[0041] Figure 14 is a schematic view of a construction cross section of an arch rib tripod installation;

[0042] Figure 15 is a schematic view of a construction cross section of an arch rib pre-embedded section 2 installation;

[0043] Figure 16 is a schematic view of a construction cross section after the arch rib high-low frame and arch rib tripod are removed;

[0044] Figure 17 is a schematic view of a construction cross section of a diagonal brace pre-embedded part installation;

[0045] Figure 18 is a schematic view of a construction cross section of a pull rod pre-embedded part installation;

[0046] Figure 19 This is a flowchart of the pre-embedded construction process for the arch foot of a thrustless arch bridge.

[0047] The diagram is labeled as follows: 1-Pile foundation; 2-Leveling cushion layer; 3-Embedded cushion layer; 4-Anchor cushion layer; 5-Anchor adjusting screw; 6-Frame plate; 7-Prong shot; 8-Connecting ear plate; 9-Arch leg fixing end; 10-Arch rib straight leg; 11-Arch rib embedded section two; 12-Arch rib embedded section one; 13-Arch rib fixing end; 14-Tie rod fixing end; 15-Tie rod embedded part; 16-Diagonal brace embedded part; 17-Diagonal brace fixing frame; 171-Front leg steel frame; 172-Rear leg Steel frame; 18-Arch rib tripod; 181-Diagonal steel frame; 182-Straight steel frame; 19-High and low arch rib frame; 191-High steel frame; 192-Low steel frame; 20-Wedge block; 21-Fixing bolt; 22-Adjusting bolt; 23-Upright adjusting screw; 24-Stabilizing rib plate; 25-Stabilizing diagonal brace; 26-Nail hole; 27-Fixing base; 28-Crown beam; 29-Connecting beam; 30-Cross beam; 31-L-shaped adjusting screw; 32-Ground frame. Detailed Implementation

[0048] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0049] Example 1

[0050] As one example, such as Figures 1 to 19 As shown, a method for pre-embedding the arch foot of a thrustless arch bridge is characterized by the following features: the pre-embedded components corresponding to the arch foot include pre-embedded arch ribs, diagonal brace pre-embedded components 16, and tie rod pre-embedded components 15. The pre-embedded arch ribs further include vertical arch rib straight legs 10, inclined arch rib pre-embedded section one 12, and arch rib pre-embedded section two 11. Before installing the pre-embedded components, the various fixed ends and fixing frames corresponding to the pre-embedded components are precisely installed. Before installing the various fixed ends and fixing frames, the multiple foot frame grids 32 corresponding to the various fixed ends and fixing frames are precisely installed. The specific construction steps are as follows:

[0051] Step 1: Construction of leveling cushion layer for pile cap: Roughen the pile heads of pile foundation 1 under the pile cap, level the bottom layer of the pile cap and then pour concrete. When pouring concrete, it is necessary to use vibration equipment and leveling equipment to spread the concrete evenly, and finally form a leveling cushion layer 2 with a thickness of 0.5m to 1.0m.

[0052] Step two, the fixing of the footing frame in the field: according to the size of the various types of fixed ends and the position of the connecting bolt holes required by different arch foot embedded parts, the footing frame 32 is processed and manufactured in the factory, and then transported to the site for fixing. The specific steps are as follows:

[0053] 2.1 Manufacturing the footing frame 32 in the factory: the footing frame 32 is composed of the footing adjusting screw 5, the frame disc 6, and the L-shaped adjusting screw 31. The frame disc 6 is a frame-shaped hollow structure formed by precise cutting of a steel plate. The frame disc 6 is provided with bolt holes for the installation of the L-shaped adjusting screw 31. The position of the footing adjusting screw 5 is accurately positioned on the frame disc 6, and then the footing adjusting screw 5 is vertically welded on the frame disc 6 through the stable inclined rod 25. The L-shaped adjusting screw 31 is composed of the vertical adjusting screw 23, the fixed base 27, and the stable rib plate 24. The fixed base 27 is provided with a nail hole 26 for fixing the footing frame 32 by the nail 7. The fixed base 27 is vertically welded with the vertical adjusting screw 23, and the stable rib plate 24 is arranged on both sides of the fixed base 27 to enable the vertical adjusting screw 23 to be firmly connected with the fixed base 27.

[0054] 2.2 On-site installation and fixing of the footing frame 32: first, the L-shaped adjusting screw 31 and the frame disc 6 with the footing adjusting screw 5 are preliminarily assembled into an integrated body by using the fixed bolt 21 and the adjusting bolt 22. The fixed bolt 21 is located on the upper part of the frame disc 6, and the adjusting bolt 22 is located on the lower part of the frame disc 6. Then, the position of the L-shaped adjusting screw 31 is accurately determined on the leveling pad 2, and the L-shaped adjusting screw 31 is positioned on site. The flatness of the frame disc 6 is adjusted and fixed by the fixed bolt 21 and the adjusting bolt 22 on the vertical adjusting screw 23. Finally, the footing frame 32 is fixed on the leveling pad 2 by the nail 7 penetrating through the nail hole 26. After fixing, the flatness of the frame disc 6 is rechecked, and if there is any deviation, the fixed bolt 21 and the adjusting bolt 22 are used to adjust it until the requirements are met.

[0055] 2.3 Repeat steps 2.1-2.2 to complete the accurate installation of the footing frame 32 corresponding to the fixed end 14 of the tie rod, the fixed end 13 of the arch rib, the fixed end 9 of the arch leg, and the fixed end 17 of the inclined brace at the center line of a certain section.

[0056] Step three, footing pad construction: the periphery of each type of fixed footing frame 32 on the leveling pad 2 is formworked, and the formwork height exceeds the upper position of the stable inclined rod 25 on the footing adjusting screw 5, and then the concrete is poured to form multiple isolated footing pads 4.

[0057] Step four, fixed end field installation: the purchased or factory processing good pull rod fixed end 14, arch rib fixed end 13 and arch leg fixed end 9 through the foot adjusting screw 5, connecting lug plate 8, fixed bolt 21, adjusting bolt 22 and foot frame 32 are installed on site, all kinds of fixed end installation first with connecting lug plate 8 welding, connecting lug plate 8 is provided with bolt hole and stable rib plate 24, used for enhancing the stability of connection; Fixed bolt 21 is located in the upper part of connecting lug plate 8, adjusting bolt 22 is located in the lower part of connecting lug plate 8, used for adjusting the flatness of all kinds of fixed end; The bottom of all kinds of fixed end after installation needs to keep more than 20 cm static distance with the top of foot pad 4, which is convenient for the pouring construction of pre-embedded pad 3.

[0058] Step five, diagonal bracing fixed frame field installation: the production of diagonal bracing fixed frame 17 is carried out in the factory, diagonal bracing fixed frame 17 is formed integrally by connecting beam 29 and cross beam 30 connecting front leg steel frame 171 and rear leg steel frame 172, and crown beam 28 and connecting lug plate 8 are installed at the top and bottom of front leg steel frame 171 and rear leg steel frame 172 respectively, and diagonal bracing fixed frame 17 is installed on site with foot frame 32 through foot adjusting screw 5, connecting lug plate 8, fixed bolt 21 and adjusting bolt 22; The structure of connecting lug plate 8 on diagonal bracing fixed frame 17 is consistent with that on fixed end; The bottom of diagonal bracing fixed frame 17 after installation needs to keep more than 20 cm static distance with the top of foot pad 4, which is convenient for the pouring construction of pre-embedded pad 3.

[0059] Repeat steps two to five until the installation of all kinds of fixed end and diagonal bracing fixed frame 17 at the center line of all sections is completed.

[0060] Step six, pre-embedded pad construction of pile cap: after the installation of all kinds of fixed end and diagonal bracing fixed frame 17 at the center line of all sections is completed, pre-embedded pad 3 is constructed along the entire pile cap plane, the thickness of pre-embedded pad 3 extends to the bottom of adjusting bolt 22 on foot adjusting screw 5, and the lower part of all kinds of fixed end and diagonal bracing fixed frame 17 can be embedded in it, so as to further stabilize all kinds of fixed end and diagonal bracing fixed frame 17.

[0061] Step seven, pre-embedded arch rib hoisting and positioning construction: pre-embedded arch rib includes arch rib pre-embedded section one 12, arch rib straight leg 10 and arch rib pre-embedded section two 11, the specific hoisting and positioning steps are as follows:

[0062] 7.1 Arch rib high-low bracket installation: an arch rib high-low bracket 19 is erected on the pre-embedded cushion 3 between the arch rib fixed end 13 and the arch leg fixed end 9, the arch rib high-low bracket 19 is formed by connecting the high steel frame 191 and the low steel frame 192 through the connecting beam 29, and the crown beam 28 is arranged on the high steel frame 191 and the low steel frame 192 for placing the wedge-shaped block 20, the attitude of the arch rib pre-embedded section one 12 can be adjusted through the wedge-shaped block 20 on the arch rib high-low bracket 19, and precise installation is facilitated.

[0063] 7.2 Arch rib pre-embedded section one installation: the prefabricated arch rib pre-embedded section one 12 is hoisted to the arch rib high-low bracket 19, the attitude of the arch rib pre-embedded section one 12 is adjusted through the wedge-shaped block 20 on the arch rib high-low bracket 19, and the arch rib pre-embedded section one 12 is connected and fixed with the arch rib fixed end 13 by using the welding process.

[0064] 7.3 Arch rib straight leg installation: the prefabricated arch rib straight leg 10 is hoisted to the arch leg fixed end 9, the attitude is adjusted by using the lifting tool, and then the arch rib straight leg 10 is connected and fixed with the arch leg fixed end 9 by using the welding process.

[0065] 7.4 Arch rib tripod installation: an arch rib tripod 18 is erected on the pre-embedded cushion 3 between the arch rib high-low bracket 19 and the arch rib straight leg 10, the arch rib tripod 18 is assembled by the inclined steel frame 181 and the straight steel frame 182, the top of the straight steel frame 182 is also provided with the crown beam 28 and the wedge-shaped block 20 for adjusting the attitude of the arch rib pre-embedded section two 11, and precise installation is facilitated.

[0066] 7.5 Arch rib pre-embedded section two installation: the prefabricated arch rib pre-embedded section two 11 is hoisted to the arch rib tripod 18 and the arch rib straight leg 10, the attitude of the arch rib pre-embedded section two 11 is adjusted through the wedge-shaped block 20 on the arch rib tripod 18, and the arch rib pre-embedded section two 11 is connected and fixed with the arch rib pre-embedded section one 12 and the arch rib straight leg 10 by using the welding process.

[0067] 7.6 Removal of arch rib high-low bracket and arch rib tripod: after the installation of the arch rib pre-embedded section two 11 is completed, the wedge-shaped blocks 20 on the arch rib high-low bracket 19 and the arch rib tripod 18 are removed, and then the arch rib high-low bracket 19 and the arch rib tripod 18 are synchronously removed.

[0068] Step eight, diagonal brace pre-embedded part installation: the prefabricated diagonal brace pre-embedded part 16 is hoisted to the diagonal brace fixed bracket 17, the attitude of the diagonal brace pre-embedded part 16 is adjusted by using the wedge-shaped block 20, and then it is welded and fixed on the diagonal brace fixed bracket 17.

[0069] Step nine, pull rod pre-embedded part installation: the prefabricated pull rod pre-embedded part 15 is hoisted to the pull rod fixed end 14, the attitude is adjusted by using the lifting tool, and then the pull rod pre-embedded part 15 is connected and fixed with the pull rod fixed end 14 by using the welding process.

[0070] Repeat steps seven to nine until the construction of the embedded arch rib, inclined brace embedded part 16 and pull rod embedded part 15 at all section center lines is completed.

[0071] Embodiment two

[0072] As another embodiment, the no-thrust arch bridge arch foot embedded construction method proposed in embodiment one, the obtained no-thrust arch bridge arch foot embedded structure includes: a leveling pad 2, a ground foot frame 32, a fixed end and an inclined brace fixing frame 17; the 0.5m-1.0m thick leveling pad 2 is arranged on the upper surface of the pile cap, the ground foot frame 32 is arranged on the upper surface of the leveling pad 2, the ground foot frame 32 includes a ground foot adjusting screw 5, a frame disc 6 and an L-shaped adjusting screw 31, the frame disc 6 is a frame-shaped hollow structure, and a plurality of ground foot adjusting screws 5 are vertically arranged on the upper surface of the frame disc 6; the ground foot adjusting screw 5 is connected to the frame disc 6 through a stable inclined rod 25, the bottom end of the ground foot adjusting screw 5 penetrates the frame disc 6, and the bottom end of the ground foot adjusting screw 5 is flush with the lower surface of the frame disc 6; the vertical adjusting screw 23 of the L-shaped adjusting screw 31 penetrates the frame disc 6, and the vertical adjusting screw 23 is respectively provided with a fixed bolt 21 and an adjusting bolt 22 on the upper and lower sides of the penetration of the frame disc 6; a plurality of ground foot frames 32 are respectively connected to the fixed end and the inclined brace fixing frame 17 through a connecting lug plate 8 on the top of the ground foot adjusting screw 5, and the upper and lower parts of the connecting lug plate 8 are respectively provided with a fixed bolt 21 and an adjusting bolt 22; the bottom of the vertical adjusting screw 23 is connected to a fixed base 27, a stable rib plate 24 is arranged between the vertical adjusting screw 23 and the fixed base 27, and the fixed base 27 is connected to the leveling pad 2 through a nail hole 26 and a nail 7; the stable rib plate 24 is also arranged on the connecting lug plate 8.

[0073] The ground foot frame 32 is wrapped with a ground foot pad 4, the ground foot pad 4 at each ground foot frame 32 is independent, and the material of the ground foot pad 4 is concrete; the top of the ground foot pad 4 is higher than the stable inclined rod 25, and the upper end of the ground foot adjusting screw 5 is exposed on the upper surface of the ground foot pad 4; the vertical distance from the bottom of the fixed end and the inclined brace fixing frame 17 to the top of the ground foot pad 4 is greater than 20cm, which facilitates the pouring construction of the embedded pad 3.

[0074] The embedded pad 3 is arranged above the leveling pad 2 and the ground foot pad 4, the upper surface of the embedded pad 3 is higher than the bottom of the fixed end, and the upper surface of the embedded pad 3 is lower than the bottom of the adjusting bolt 22 on the connecting lug plate 8.

[0075] The fixed end comprises a pull rod fixed end 14, an arch rib fixed end 13 and an arch leg fixed end 9, the pull rod fixed end 14 is provided with a pull rod embedded part 15 above, the top section of the arch rib fixed end 13 is in the shape of an isosceles triangle, the arch rib fixed end 13 is sequentially connected with an arch rib embedded section one 12 and an arch rib embedded section two 11 on one side, the arch leg fixed end 9 is provided with an arch rib straight leg 10 above, the arch rib straight leg 10 is connected with the arch rib embedded section two 11 from below at the top; the front leg steel frame 171 of the inclined support fixed frame 17 is lower than the rear leg steel frame 172, the top end of the rear leg steel frame 172 is provided with a wedge-shaped block 20, the inclined support fixed frame 17 is provided with an inclined support embedded part 16 obliquely above, and the wedge-shaped block 20 and the inclined support embedded part 16 are in surface contact.

[0076] The arch rib high-low frame 19 is arranged between the embedded cushion layer 3 and the arch rib embedded section one 12, the arch rib high-low frame 19 comprises a high steel frame 191 and a low steel frame 192, the high steel frame 191 and the low steel frame 192 are connected through a connecting beam 29, and the top of the high steel frame 191 and the low steel frame 192 is also provided with a crown beam 28 and a wedge-shaped block 20, the wedge-shaped block 20 is in contact with the outer wall of the arch rib embedded section one 12, and is used for adjusting the posture of the arch rib embedded section one 12.

[0077] The arch rib tripod 18 is arranged between the embedded cushion layer 3 and the arch rib embedded section two 11, the arch rib tripod 18 comprises an inclined steel frame 181 and a straight steel frame 182, the top of the straight steel frame 182 is also provided with a crown beam 28 and a wedge-shaped block 20, the wedge-shaped block 20 is in close contact with the outer wall of the arch rib embedded section two 11, and is used for adjusting the posture of the arch rib embedded section two 11. The inclined steel frame 181 is arranged on the side of the straight steel frame 182 away from the arch rib embedded section one 12; the arch rib high-low frame 19 and the arch rib tripod 18 are arranged between the arch rib fixed end 13 and the arch leg fixed end 9.

[0078] The bottom of the front leg steel frame 171 and the rear leg steel frame 172 of the inclined support fixed frame 17 is of the same height, the front leg steel frame 171 and the rear leg steel frame 172 are connected through a connecting ear plate 8 and a foundation adjusting screw 5, the connecting ear plate 8 is provided with a stable rib plate 24; the top end of the front leg steel frame 171 is lower than the top end of the rear leg steel frame 172, the front leg steel frame 171 and the rear leg steel frame 172 are connected through a connecting beam 29 and a cross beam 30, the top end of the front leg steel frame 171 and the rear leg steel frame 172 is provided with a crown beam 28, the wedge-shaped block 20 is arranged above the crown beam 28 at the top end of the rear leg steel frame 172, and the angle of the wedge-shaped block 20 matches the inclination angle of the inclined support embedded part 16.

Claims

1. A construction method for embedding the arch foot of a non-thrusting arch bridge, characterized in that, The method comprises the following steps: Step one, construction of the bearing platform leveling pad: the pile head of the pile foundation (1) is chiseled, the bottom layer of the bearing platform is leveled, and then concrete is poured to form the leveling pad (2), the thickness of the leveling pad (2) is 0.5-1.0 m; Step two, site fixing of the footing frame: the footing frame (32) is installed, then the flatness of the frame plate (6) is adjusted and fixed by the fixing bolt (21) and the adjusting bolt (22), the installation of the footing frame (32) corresponding to the fixed end and the inclined support fixing frame (17) is completed, the footing frame (32) comprises the footing adjusting screw (5), the frame plate (6) and the L-shaped adjusting screw (31), the frame plate (6) is obtained by cutting the profiled steel plate, and the frame plate (6) is provided with bolt holes around, the position of the footing adjusting screw (5) is positioned on the frame plate (6), then the footing adjusting screw (5) is vertically welded on the frame plate (6) through the stable inclined rod (25), the L-shaped adjusting screw (31) comprises the vertical adjusting screw (23), the fixing base (27) and the stable rib plate (24), the fixing base (27) is provided with the nail hole (26), the fixing base (27) is vertically welded with the vertical adjusting screw (23), and the stable rib plate (24) is arranged on the two sides of the fixing base (27), the footing frame (32) is fixed on the leveling pad (2) through the nail (7) penetrating through the nail hole (26), the fixed end comprises the pull rod fixed end (14), the arch rib fixed end (13) and the arch leg fixed end (9), the fixed end is connected with the footing adjusting screw (5) of the footing frame (32) through the lug plate (8), and the fixing bolt (21) and the adjusting bolt (22) are further arranged between the lug plate (8) and the footing adjusting screw (5); Step three, construction of the footing pad: the footing pad (4) is formed by vertically pouring concrete around the footing frame (32); Step four, site installation of the fixed end: the lug plate (8) is welded on the fixed end, the fixed ends are installed on the footing frame (32) and the flatness of the fixed ends is adjusted through the fixing bolt (21) and the adjusting bolt (22); Step five, site installation of the inclined support fixing frame: the top end and the lower part of the inclined support fixing frame (17) are respectively provided with the crown beam (28) and the connecting lug plate (8), and the inclined support fixing frame (17) is installed on the footing frame (32); Step six, construction of the bearing platform embedded pad: the embedded pad (3) is constructed on the leveling pad (2); Step seven, hoisting construction of the embedded arch rib: the arch rib high-low frame (19) is erected on the embedded pad (3), and then the embedded arch rib section one (12) is installed, the arch rib straight leg (10) is installed on the arch leg fixed end (9), the arch rib tripod (18) is erected on the embedded pad (3), the embedded arch rib section two (11) is installed on the arch rib tripod (18) and the arch rib straight leg (10), and then the arch rib high-low frame (19) and the arch rib tripod (18) are removed, finally, the inclined support embedded part (16) is installed on the inclined support fixing frame (17), and the pull rod embedded part (15) is installed on the pull rod fixed end (14).

2. The construction method of the no-thrust arch bridge abutment pre-buried construction method according to claim 1, characterized in that, In step five: the diagonal brace fixing frame (17) includes front leg steel frame (171) and rear leg steel frame (172), the front leg steel frame (171) and the rear leg steel frame (172) are connected by the tie beam (29) and the cross beam (30) to form an integral, the top of the front leg steel frame (171) and the rear leg steel frame (172) is provided with the crown beam (28), the crown beam (28) on the top of the rear leg steel frame (172) is provided with the wedge block (20) above.

3. The construction method of the no-thrust arch bridge abutment pre-buried according to claim 1, characterized in that, In step six: the embedded cushion layer (3) is higher than the fixed end and the lower part of the diagonal brace fixing frame (17).

4. The construction method of the no-thrust arch bridge abutment pre-buried according to claim 3, characterized in that: According to the cross section position, repeat the construction of steps two to five until the installation of the footing frame (32), the footing cushion layer (4), the fixed end and the diagonal brace fixing frame (17) on all cross sections is completed, and then the construction of the embedded cushion layer (3) in step six is carried out.

5. The construction method of the no-thrust arch bridge abutment pre-buried construction method according to claim 1, characterized in that, In step seven: the arch rib high-low frame (19) includes high steel frame (191) and low steel frame (192), the high steel frame (191) and the low steel frame (192) are connected by the tie beam (29), and the top of the high steel frame (191) and the low steel frame (192) is provided with the wedge block (20) through the crown beam (28), the posture of the arch rib embedded section one (12) is adjusted through the wedge block (20); The arch rib tripod (18) includes inclined steel frame (181) and straight steel frame (182), the top of the straight steel frame (182) is also provided with the crown beam (28) and the wedge block (20), the posture of the arch rib embedded section two (11) is adjusted through the wedge block (20), the inclined steel frame (181) is arranged on the side of the straight steel frame (182) away from the arch rib embedded section one (12); the arch rib high-low frame (19) and the arch rib tripod (18) are arranged between the arch rib fixed end (13) and the arch leg fixed end (9); After the installation of the arch rib embedded section two (11) is completed, the wedge blocks (20) on the arch rib high-low frame (19) and the arch rib tripod (18) are removed, and then the arch rib high-low frame (19) and the arch rib tripod (18) are removed synchronously.

6. The construction method of the no-thrust arch bridge abutment pre-buried construction method according to claim 1, characterized in that: According to the cross section position, repeat the construction of step seven until the installation of the arch rib embedded section one (12), the arch rib straight leg (10), the arch rib embedded section two (11), the diagonal brace embedded part (16) and the pull rod embedded part (15) on all cross sections is completed, and the construction of the no-thrust arch bridge arch foot embedded system is completed.

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