Installation and construction method of bridge underwater tie beam without cofferdam

Abstract

The invention relates to a method for installing a bridge underwater tie beam without a cofferdam, and belongs to the field of water conservancy engineering. The method for installing a bridge underwater tie beam without a cofferdam comprises: S200, inserting two bottom steel pipes into the bottom of the water; S300, lifting a casing and connecting the casing to the top of the corresponding steel pipe; connecting the casing with the corresponding steel pipe; ensuring that the first-order guard plates on the two casings are arranged relative to each other; S400, inserting a vertical steel cage and extending it to the inside of the steel pipe, and inserting the bottom into the bottom of the water; S500, injecting concrete into each steel pipe; S600, remove the concrete in the casing; remove the first-order guard plate; S700, cast the crossbeam; S800, move the crossbeam between the two casings, and insert the transverse reinforcement cage leaking out at both ends of the crossbeam into the opening of the casing; ensure that the transverse reinforcement cage does not interfere with the vertical reinforcement cage; S900, insert the second-order guard plate at the opening of the casing, and the bottom of the second-order guard plate contacts the upper surface of the crossbeam; S1000, cast concrete in the casing; S2000, wait for the concrete to solidify before removing the second-order guard plate and casing.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a cofferdam-free installation construction method for a bridge underwater tie beam. Background Art

[0002] With the vigorous development and rapid improvement of my country's social economy, the transportation engineering industry has ushered in unprecedented development opportunities, and its development level has achieved a qualitative leap. As one of the core infrastructure constructions of my country's economic construction, the transportation industry not only greatly facilitates people's daily travel, but also plays a vital role in accelerating industrial transportation and promoting economic development. Bridge engineering, as a shining pearl in the field of transportation engineering, plays a vital role in various types of engineering construction today. Its wide range of applications and great influence cannot be ignored.

[0003] In the construction process of cross-river bridges, the construction of underwater pile foundations and tie beams (caps) is undoubtedly one of the most difficult technical problems. Faced with the dual pressures of tight construction schedule and pursuit of economic benefits, construction units often need to adopt efficient and practical construction methods. In addition, in the existing technology, the mold is directly set up and poured with concrete. Its construction efficiency is low, and some molds cannot be disassembled and reused, which increases the economic cost.

[0004] Therefore, the present application provides a cofferdam-free installation construction method for an underwater tie beam of a bridge to solve the problems of low construction efficiency and high cost in the prior art. Summary of the invention

[0005] In view of the shortcomings of the related art, the present invention provides a method for installing a bridge underwater tie beam without a cofferdam, which can realize the pouring of concrete without replacing the casing by means of the first-order and second-order protective plates on the casing. After the construction is completed, the casing can be removed and reused, so as to solve the technical problems of low construction efficiency and high cost in the prior art.

[0006] The present invention provides a method for installing and constructing a bridge underwater tie beam without a cofferdam, comprising:

[0007] S100, preparation stage;

[0008] S200, insert two bottom steel pipes into the water bottom;

[0009] S300, lifting the casing and connecting the casing to the top of the corresponding steel pipe; connecting the casing with the corresponding steel pipe; ensuring that the first-order guard plates on the two casings are arranged oppositely;

[0010] S400, hoist the vertical steel cage, insert the vertical steel cage from the top of the casing and extend it to the inside of the steel pipe, and insert the bottom of the vertical steel cage into the bottom of the water;

[0011] S500, injecting concrete into each steel pipe;

[0012] S600, after the concrete solidifies, crush and remove the concrete in the casing; remove the first-order guard plate;

[0013] S700, pouring beams;

[0014] S800, lift the crossbeam, move the crossbeam from top to bottom to between the two casings, insert the transverse reinforcement cages leaking from both ends of the crossbeam into the openings of the casings; ensure that the transverse reinforcement cages do not interfere with the vertical reinforcement cages;

[0015] S900, inserting a second-order guard plate at the opening of the casing, wherein the bottom of the second-order guard plate contacts the upper surface of the beam;

[0016] S1000, pouring concrete in casing;

[0017] S2000, wait for the concrete to solidify before removing the second-stage guard plate and casing.

[0018] In the technical solution, by installing the first-order and second-order protective plates on the casing, concrete pouring can be achieved without replacing the casing, thereby improving construction efficiency. After the construction is completed, the casing can be removed and reused.

[0019] In some embodiments, the specific steps of S100 include:

[0020] Insert the end of the transverse reinforcement cage into the vertical reinforcement cage. When interference occurs, adjust the steel bar spacing of the transverse reinforcement cage or the vertical reinforcement cage to ensure that no interference occurs after the end of the transverse reinforcement cage is inserted into the vertical reinforcement cage.

[0021] In the technical solution, by adjusting the steel bar spacing of the transverse steel cage or the vertical steel cage, it is ensured that the end of the transverse steel cage can be smoothly inserted into the vertical steel cage, avoiding interference between the steel bars and ensuring the integrity and stability of the steel cage.

[0022] In some embodiments, in step S300, it further includes:

[0023] Splice the two heightened guard plates to each other at the bottom of the corresponding casing, and manually confirm that the casing and the heightened pipe formed by the splicing of the two heightened guard plates can rotate with each other;

[0024] When the casing is lifted and connected to the top of the corresponding steel pipe, the bottom end of the increased pipe is connected to the corresponding steel pipe thread.

[0025] In the technical solution, when the height of the casing or steel pipe is higher or lower, the height of the casing can be adjusted by rotating the increased pipe. And because the increased pipe is rotatably connected to the casing, it can ensure that the first-order guard plates on the two casings are opposite. And because the increased height casing is spliced ​​with two sections of increased height guard plates, the increased height casing can be removed and reused after the construction is completed. It is easy to adjust and saves costs.

[0026] In some embodiments, the specific steps of step S200 are:

[0027] Lift the first steel pipe and insert it from top to bottom into the water bottom of the construction location;

[0028] Lift the second steel pipe and insert it from top to bottom into the water bottom of the construction location.

[0029] In some embodiments, the specific steps of S300 are:

[0030] Lift the first casing and drop it from top to bottom to the top of the first steel pipe, adjust the first casing so that the position of the first-step guard plate on the first casing faces the second steel pipe, and ensure that the first casing is coaxial with the first steel pipe; connect the first casing with the first steel pipe;

[0031] Lift the second casing and drop it from top to bottom to the top of the second steel pipe, adjust the second casing so that the position of the first-step guard plate on the second casing faces the first casing, and ensure that the second casing is coaxial with the second steel pipe; connect the second casing with the second steel pipe.

[0032] In the technical proposal, the connection process between the casing and the steel pipe is detailed. By adjusting the position and angle of the casing, the casing is ensured to be coaxial with the steel pipe. The position of the first-order guard plate is confirmed to ensure that the openings of the first casing and the second casing are opposite, providing a solid foundation for subsequent construction steps.

[0033] In some of the embodiments, in step S400, the bottom of the vertical steel cage is inserted into the water bottom, and the vertical steel cage is rotated.

[0034] In the technical solution, rotating the vertical steel cage can reduce the resistance when inserting into the water bottom, reduce the difficulty of inserting the vertical steel cage, and the mud on the bottom of the water can fill the gaps in the steel cage, further ensuring the stability and position accuracy of the steel cage in the water.

[0035] In some embodiments, the specific steps of S700 are:

[0036] Set up formwork at the bottom, both sides and ends of the transverse reinforcement; pour concrete in the area formed by the formwork, and remove the formwork after the concrete solidifies.

[0037] In the technical solution, by setting formwork at the bottom, both sides and ends of the transverse reinforcement, the shape and size of the beam can be ensured to be accurate during casting.

[0038] In some embodiments, the specific steps of S800 are:

[0039] Connect the crane to the prefabricated lifting ears of the beam, lift the beam, move the beam from top to bottom between the two casings, overlap the bottom of the beam on the top of the corresponding steel pipe, and insert the transverse steel cage leaking from both ends of the beam into the openings of the first casing and the second casing respectively; adjust the transverse steel cage to avoid interference between the transverse steel cage and the vertical steel cage.

[0040] In the technical solution, the preset lifting lugs facilitate the operation of the lifting equipment, and the transverse reinforcement cage is adjusted to avoid interference, ensuring the stable connection between the beam, casing and steel pipe piles in the subsequent construction.

[0041] In some embodiments, the specific steps of S1000 are:

[0042] Pour the concrete from the top of the casing and stop pouring when the top of the concrete is flush with the top of the beam.

[0043] In the technical solution, ensure that the top of the beam is a horizontal plane, which is convenient for its application in other subsequent construction scenarios.

[0044] In some embodiments, the specific steps of S2000 are:

[0045] After waiting for the concrete to solidify, remove the second-order guard plate first, and then lift the casing from bottom to top.

[0046] In the technical solution, the casing, first-order guard plate and second-order guard plate can be reused, saving construction costs.

[0047] Based on the above technical solution, in the embodiment of the present invention, by using the first-order guard plate and the second-order guard plate on the casing, concrete pouring can be achieved without replacing the casing, thereby improving construction efficiency. After the construction is completed, the casing can be removed and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0049] Figure 1 It is one of the partial structural schematic diagrams of one embodiment of the method for installing and constructing a bridge underwater tie beam without cofferdam according to the present invention;

[0050] Figure 2The second partial structural schematic diagram of an embodiment of the method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0051] Figure 3 It is a top view of a partial structure of an embodiment of a method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0052] Figure 4 It is a schematic structural diagram of a cross-section of an embodiment of a method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0053] Figure 5 A cross-sectional view of an embodiment of a method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0054] Figure 6 It is one of the overall structural schematic diagrams of an embodiment of the method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0055] Figure 7 The second overall structural schematic diagram of an embodiment of the method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0056] Figure 8 A second top view of a partial structure of an embodiment of a method for installing a bridge underwater tie beam without a cofferdam according to the present invention;

[0057] Fig. 9 This is one of the construction flow charts of the construction method for installing the underwater tie beam of a bridge without cofferdam according to the present invention;

[0058] Fig.10 This is the second construction flow chart of the construction method for installing the underwater tie beam of the bridge without cofferdam of the present invention;

[0059] Fig.11 The present invention is a third construction flow chart of the method for installing a bridge underwater tie beam without a cofferdam.

[0060] In the figure:

[0061] 100, steel pipe; 200, casing; 300, heightened guard plate; 301, internal thread section; 400, first-order guard plate; 500, vertical steel cage; 600, horizontal steel cage; 700, crossbeam; 800, second-order guard plate. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] Please refer to all the accompanying drawings. In an illustrative embodiment of the method for installing a bridge tie beam in water without a cofferdam according to the present invention, the method for installing a bridge tie beam in water without a cofferdam comprises: S100, a preparation stage.

[0067] In some embodiments, step S100 includes step S110 , and step S100 is transporting materials.

[0068] In some embodiments, the specific steps of step S110 are to place the steel pipe 100, casing 200, first-order guard plate 400, second-order guard plate 800, vertical steel cage 500, horizontal steel cage 600, heightened guard plate 300, formwork, casting equipment and lifting equipment in the construction area.

[0069] Furthermore, if the construction area is close to the shore, in step S110, the steel pipe 100, casing 200, first-order guard plate 400, second-order guard plate 800, vertical steel cage 500, transverse steel cage 600, heightened guard plate 300, formwork, casting equipment and lifting equipment are placed on the shore of the construction area.

[0070] Furthermore, if the construction area is far away from the shore, in step S110, the steel pipe 100, the casing 200, the first-order guard plate 400, the second-order guard plate 800, the vertical steel cage 500, the transverse steel cage 600, the heightened guard plate 300, the formwork, the casting equipment and the lifting equipment are placed on the construction ship, and the construction ship is moved to the construction area.

[0071] It is worth noting that when using a construction vessel, the lifting equipment can be integrated into the construction vessel, that is, the construction vessel is equipped with its own lifting equipment.

[0072] In the present invention, the casing 200 is not a complete tubular shape. The casing 200 has an opening that completely penetrates its peripheral wall. The opening penetrates the casing 200 not only along the thickness direction of the casing 200 but also along the axial direction of the casing 200.

[0073] The first-stage shield 400 and the second-stage shield 800 may be disposed at the opening of the casing 200. When the first-stage shield 400 and the second-stage shield 800 are connected to the opening of the casing 200, a sealing structure may be formed.

[0074] In some embodiments, step S100 further includes step S120. Step S120 is trial and error correction before construction. Step S120 is in step S110.

[0075] In some embodiments, step S120 is to insert the end of the transverse steel cage 600 into the vertical steel cage 500. When interference occurs, adjust the steel bar spacing of the transverse steel cage 600 or the vertical steel cage 500 to ensure that no interference occurs after the end of the transverse steel cage 600 is inserted into the vertical steel cage 500.

[0076] Through step S120, before the vertical steel cage 500 is inserted into the bottom of the water, the vertical steel cage 500 is aligned with the horizontal steel cage 600 for verification. When a problem occurs, the positions of the steel bars of the vertical steel cage 500 and the horizontal steel cage 600 can be directly adjusted to avoid interference in the subsequent construction process, further improving the flexibility of the construction process.

[0077] Furthermore, the more specific step of step S120 is to manually place the transverse reinforcement cage 600 on the ground or on a construction ship. The vertical reinforcement cage 500 is lifted by a lifting device, and the vertical reinforcement cage 500 is perpendicular to the transverse reinforcement cage 600, and the end of the vertical reinforcement cage 500 is inserted from top to bottom into the end of the transverse reinforcement cage 600. The worker observes whether there is interference between the vertical reinforcement cage 500 and the reinforcement of the transverse reinforcement cage 600. If interference occurs, the spacing of the reinforcements of the transverse reinforcement cage 600 or the vertical reinforcement cage 500 is adjusted.

[0078] In another embodiment, the specific steps of step S120 are: manually placing the vertical steel cage 500 on the ground or on a construction ship. Lifting the transverse steel cage 600 by a lifting device, the transverse steel cage 600 is perpendicular to the vertical steel cage 500. Inserting the end of the transverse steel cage 600 into the end of the vertical steel cage 500. A worker observes whether the vertical steel cage 500 and each steel bar of the transverse steel cage 600 interfere with each other. If interference occurs, the steel bar spacing of the transverse steel cage 600 or the vertical steel cage 500 is adjusted.

[0079] It is worth noting that the vertical steel cage 500 is placed on the ground or on a construction ship, and when the transverse steel cage 600 is hoisted, the vertical steel cage 500 can be horizontally arranged on the ground; when the transverse steel cage 600 is hoisted, the transverse steel cage 600 is ensured to be vertical. Alternatively, the vertical steel cage 500 is vertical to the ground; when the transverse steel cage 600 is hoisted, the transverse steel cage 600 is ensured to be horizontal.

[0080] In some embodiments, in step S120, when the vertical steel cage 500 and the steel bars of the transverse steel cage 600 interfere with each other, the corresponding steel bars can be bent and adjusted by a bending device.

[0081] In some embodiments, the vertical steel bar cage 500 includes a plurality of vertical steel bars in a circular shape. The transverse steel bar cage 600 includes a plurality of transverse steel bar cages 600 spaced apart in a horizontal direction.

[0082] In some embodiments, step S100 is followed by step S200 , in which step S200 is to insert two bottom steel pipes 100 into the water bottom.

[0083] In some embodiments, in one structure, the steel pipe 100 may include a first steel pipe 100 and a second steel pipe 100. The casing 200 may also correspond to a first casing 200 and a second casing 200.

[0084] In some embodiments, the specific steps of step S200 are: lifting the first steel pipe 100 and inserting it from top to bottom into the bottom of the water at the construction location; lifting the second steel pipe 100 and inserting it from top to bottom into the bottom of the water at the construction location.

[0085] In some embodiments, a more specific step of step S200 is to connect the sling of the lifting device to the end of the first steel pipe 100. The first steel pipe 100 is lifted by the lifting device, and the first steel pipe 100 is ensured to be vertical by manual adjustment. According to the construction drawings, the first steel pipe 100 is placed at the construction position, the first steel pipe 100 is lowered, and the bottom end of the first steel pipe 100 is inserted into the bottom of the water. The sling of the lifting device is manually separated from the first steel pipe 100. The first steel pipe 100 is driven into the bottom of the water to a preset construction height by a piling device.

[0086] Connect the lifting rope of the lifting equipment to the end of the second steel pipe 100. Lift the second steel pipe 100 by the lifting equipment, and ensure that the second steel pipe 100 is vertical by manual adjustment. According to the construction drawings, place the second steel pipe 100 at the construction location, lower the second steel pipe 100, and insert the bottom of the second steel pipe 100 into the water. Manually separate the lifting rope of the lifting equipment from the second steel pipe 100. Use the piling equipment to drive the second steel pipe 100 into the water to the preset construction height.

[0087] In some embodiments, step S200 is followed by step S300. Step S300 is to lift the casing 200 and connect the casing 200 to the top of the corresponding steel pipe 100; connect the casing 200 with the corresponding steel pipe 100; and ensure that the first-stage guard plates 400 on the two casings 200 are arranged opposite to each other.

[0088] In some embodiments, step S300 includes step S310, and step S310 is installing an increase pipe.

[0089] In some embodiments, the specific steps of step S310 also include: splicing two sections of heightened protective plates 300 to each other at the bottom ends of the corresponding casing 200, manually confirming that the increased tube formed by the casing 200 and the two sections of heightened casing 200 plates can rotate with each other; when lifting the casing 200 and docking the casing 200 with the top of the corresponding steel pipe 100, the bottom end of the increased tube is threadedly connected to the corresponding steel pipe 100.

[0090] Through the above step S310, when the height of the casing 200 or the steel pipe 100 is higher or lower, the height of the casing 200 can be adjusted by rotating the increased tube. And because the increased tube is rotatably connected to the casing 200, it can ensure that the first-order guard plates 400 on the two casings 200 are opposite. And because the increased casing 200 is spliced ​​with two sections of increased guard plates 300, the increased casing 200 can be removed and reused after the construction is completed. It is easy to adjust and saves costs.

[0091] In the present invention, the height-enhancing guard plate 300 is a semicircular arc-shaped plate, and one end of the inner wall of the height-enhancing guard plate 300 is provided with an internal thread section 301. After the two height-enhancing guard plates 300 are spliced ​​together, the internal thread sections 301 on the two height-enhancing guard plates 300 are spliced ​​together to form a complete internal thread. The outer peripheral wall of the top of the steel pipe 100 is provided with an external thread. It is worth noting that when the steel pipe 100 is inserted into the bottom of the water in step S200, ensure that the external thread is at the top.

[0092] The inner wall of the end of the height-increasing guard plate 300 away from the internal thread section 301 is recessed outward to form an annular groove. Two height-increasing guard plates 300 are spliced ​​together to form a complete annular groove.

[0093] The outer peripheral wall of the bottom end of the casing 200 is provided with an insertion section, and the insertion section is arranged along the circumference of the casing 200 .

[0094] The two height-enhancing guard plates 300 are provided with connection components to achieve the connection between the two height-enhancing guard plates 300 .

[0095] Therefore, further, in step S310, the specific construction steps are as follows: The lifting equipment lifts the casing 200 to ensure that the insertion section is located at the bottom. The annular groove of one heightened guard plate 300 is manually inserted into the insertion section to ensure that the internal thread section 301 on the heightened guard plate 300 faces downward. The annular groove of another heightened guard plate 300 is manually inserted into the insertion section, and the two heightened guard plates 300 are manually connected to each other through a connecting assembly.

[0096] In some embodiments, the two height-enhancing guard plates 300 may be connected by hinges or hinges, which are convenient for manual installation and not easy to lose.

[0097] Furthermore, the connection assembly may be a threaded connection, a latch connection, or a lock connection.

[0098] In some embodiments, step S300 further includes step S320 , which is performed after step S310 . Step S320 is to install the casing 200 on the steel pipe 100 .

[0099] In some embodiments, the steps of step S320 are: lifting the first casing 200 and dropping it from top to bottom to the top of the first steel pipe 100, adjusting the first casing 200 so that the position of the first-stage guard plate 400 on the first casing 200 faces the second steel pipe 100, and ensuring that the first casing 200 is coaxial with the first steel pipe 100; connecting the first casing 200 with the first steel pipe 100;

[0100] Lift the second casing 200 and drop it from top to bottom to the top of the second steel pipe 100, adjust the second casing 200 so that the position of the first-step protective plate 400 on the second casing 200 faces the first casing 200, and ensure that the second casing 200 is coaxial with the second steel pipe 100; connect the second casing 200 with the second steel pipe 100.

[0101] In the above step S320, the connection process of the casing 200 and the steel pipe 100 is described in detail. By adjusting the position and angle of the casing 200, it is ensured that the casing 200 is coaxial with the steel pipe 100, and the position of the first-order protective plate 400 is confirmed to ensure that the openings of the first casing 200 and the second casing 200 are opposite to each other, providing a solid foundation for subsequent construction steps.

[0102] Further, the specific steps of step S320 are: lifting the first casing 200 and moving it to the top of the first steel pipe 100, lowering the first casing 200 so that the internal thread of the increased tube below the first casing 200 corresponds to the external thread at the top of the steel pipe 100. The first casing 200 is lowered, and the increased tube is manually rotated at the same time so that the internal thread is connected with the external thread. The top height of the first casing 200 is observed, and when the top height of the first casing 200 reaches the construction requirement, the increased tube is stopped from rotating. The first casing 200 is manually rotated so that the first-stage guard plate 400 on the first casing 200 faces the second steel pipe 100.

[0103] Lift the second casing 200 and move it to the top of the second steel pipe 100, and lower the second casing 200 so that the internal thread of the increased tube below the second casing 200 corresponds to the external thread at the top of the steel pipe 100. Lower the second casing 200 and manually rotate the increased tube at the same time to connect the internal thread with the external thread. Observe the top height of the second casing 200. When the top height of the second casing 200 reaches the construction requirements, stop rotating the increased tube. Manually rotate the second casing 200 so that the first-stage guard plate 400 on the second casing 200 faces the second casing 200.

[0104] It is worth noting that in step S320, the top height of the first casing 200 may be observed by using a total station or a ruler.

[0105] In some embodiments, step S300 further includes step S400 . Step S400 is to install the vertical steel cage 500 .

[0106] In some embodiments, the specific steps of step S400 are: connect the lifting rope of the lifting equipment to one end of the vertical steel cage 500, and lift the vertical steel cage 500 by the lifting equipment. Place the vertical steel cage 500 on the top of the corresponding casing 200, lower the vertical steel cage 500, insert the vertical steel cage 500 from the top of the casing 200 and extend it to the inside of the steel pipe 100, and insert the bottom of the vertical steel cage 500 into the bottom of the water.

[0107] Insert the bottom of the vertical steel cage 500 into the water bottom, and rotate the vertical steel cage 500. Ensure that the top of the vertical steel cage 500 is at a preset construction height. It can be measured by a total station or a ruler.

[0108] It is worth noting that if the insertion resistance of the vertical steel cage 500 is too large, before inserting the vertical steel cage 500, the silt inside the steel pipe 100 can be discharged and cleaned by dredging equipment.

[0109] In step S400, the vertical steel cage 500 is rotated to reduce the resistance when inserted into the water bottom, reduce the difficulty of inserting the vertical steel cage 500, and the mud on the bottom of the water can fill the gaps of the steel cage, further ensuring the stability and position accuracy of the steel cage in the water.

[0110] It is worth noting that the vertical steel cage 500 also includes spiral steel bars, which connect the vertical steel bars. In step S400, when the vertical steel cage 500 is rotated, it is rotated from top to bottom into the water bottom along the spiral direction of the spiral steel bars. This facilitates the vertical steel cage 500 to be inserted into the water bottom.

[0111] In some embodiments, step S400 is followed by step S500 . Step S500 is to inject concrete into each steel pipe 100 .

[0112] In some embodiments, the specific steps of step S500 are: injecting concrete into the steel pipe 100 through a pouring device.

[0113] In some embodiments, step S500 is followed by step S600. Step S600 is to wait for the concrete to solidify, break and remove the concrete in the casing 200, and remove the first-stage guard plate 400.

[0114] It is worth noting that if the pouring is stopped when the height of the concrete reaches the bottom of the casing 200 in step S500, and the height of the concrete does not exceed the bottom end of the casing 200, then step S600 is not required.

[0115] Furthermore, the specific steps of step S600 are: using an electric pick to break the concrete in the casing 200, and manually cleaning the broken concrete in the casing 200. Manually pulling out the first-stage guard plate 400 from bottom to top.

[0116] In the present invention, the height of the first-stage guard plate 400 is the same as the axial height of the casing 200. The height of the second-stage guard plate 800 is the axial height of the casing 200 minus the height of the crossbeam 700.

[0117] In some embodiments, step S600 is followed by step S700 . Step S700 is pouring the beam 700 .

[0118] In some embodiments, step S700 includes: setting templates at the bottom, both sides and ends of the transverse reinforcement; pouring concrete in the area surrounded by the templates, and removing the templates after the concrete solidifies. By setting templates at the bottom, both sides and ends of the transverse reinforcement, the shape and size of the beam 700 can be ensured to be accurate during pouring.

[0119] In some embodiments, step S700 is followed by step S800. In step S800, the cross beam 700 is lifted and moved from top to bottom between the two casings 200, and the transverse steel cages 600 leaking from both ends of the cross beam 700 are inserted into the openings of the casing 200; ensuring that the transverse steel cages 600 do not interfere with the vertical steel cages 500.

[0120] In some embodiments, the specific steps of S800 are: connect the crane to the prefabricated lifting lugs of the beam 700, lift the beam 700, move the beam 700 from top to bottom between the two casings 200, overlap the bottom of the beam 700 on the top of the corresponding steel pipe 100, and insert the transverse steel cages 600 leaking from both ends of the beam 700 into the openings of the first casing 200 and the second casing 200 respectively; adjust the transverse steel cage 600 to avoid interference between the transverse steel cage 600 and the vertical steel cage 500. The preset lifting lugs facilitate the operation of the lifting equipment, and the transverse steel cage 600 is adjusted to avoid interference, ensuring the stable connection between the beam 700 and the casing 200 and the steel pipe 100 piles in the subsequent construction.

[0121] In some embodiments, step S800 is followed by step S900 . Step S900 is to insert the second-stage guard plate 800 into the opening of the casing 200 , and the bottom of the second-stage guard plate 800 contacts the upper surface of the beam 700 .

[0122] In some embodiments, step S900 is followed by step S1000 . Step S1000 is pouring concrete in casing 200 .

[0123] In some embodiments, the specific steps of S1000 are: injecting concrete from the top of the casing 200, and stopping pouring when the top of the concrete is flush with the top of the beam 700. Ensure that the top of the beam 700 is a horizontal plane, which is convenient for its application in other subsequent construction scenarios.

[0124] In some embodiments, step S1000 is followed by step S2000. Step S2000 is to remove the second-stage guard plate 800 and the casing 200 after waiting for the concrete to solidify.

[0125] In some embodiments, the specific steps of S2000 are: after waiting for the concrete to solidify, first remove the second-order guard plate 800, and then lift the casing 200 from bottom to top. By placing the first-order guard plate 400 and the second-order guard plate 800 on the casing 200, the concrete can be poured without replacing the casing 200, thereby improving the construction efficiency. After the construction is completed, the casing 200 can be removed and reused.

[0126] Further, the specific steps of S2000 are: after waiting for the concrete to solidify, remove the second-stage guard plate 800 from bottom to top, contact the connection assembly to separate the two height-enhancing guard plates 300 from each other, remove the height-enhancing guard plates 300, and then lift the casing 200 from bottom to top.

[0127] Through the description of multiple embodiments of the method for installing a bridge tie beam in water without a cofferdam according to the present invention, it can be seen that the embodiment of the method for installing a bridge tie beam in water without a cofferdam according to the present invention has at least one or more of the following advantages:

[0128] 1. By placing the first-stage protective plate 400 and the second-stage protective plate 800 on the casing 200, concrete pouring can be achieved without replacing the casing 200, thereby improving construction efficiency. After the construction is completed, the casing 200 can be removed and reused;

[0129] 2. When the height of the casing 200 or the steel pipe 100 is higher or lower, the height of the casing 200 can be adjusted by rotating the increased tube. And because the increased tube is rotatably connected to the casing 200, it can ensure that the first-order guard plates 400 on the two casings 200 are opposite. And because the increased casing 200 is spliced ​​with two sections of increased guard plates 300, the increased casing 200 can be removed and reused after the construction is completed. It is easy to adjust and saves costs.

[0130] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0131] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for installing a bridge tie beam in water without a cofferdam, characterized in that: include: S100, preparation stage; S200, insert two bottom steel pipes into the water bottom; S300, lifting the casing and connecting the casing to the top of the corresponding steel pipe; connecting the casing with the corresponding steel pipe; ensuring that the first-order guard plates on the two casings are arranged oppositely; Step S300 includes step S310, and step S310 is to install the increase pipe; The specific steps of step S310 are: splicing two sections of heightened guard plates to each other at the bottom ends of the corresponding casings, manually confirming that the casing and the heightened pipe formed by splicing the two sections of heightened casing plates can rotate with each other; when lifting the casing and docking the casing with the top of the corresponding steel pipe, the bottom end of the heightened pipe is threadedly connected with the corresponding steel pipe; When the height of the casing or steel pipe is higher or lower, rotate the increase tube to adjust the height of the casing; The inner wall of the end of the heightened guard plate away from the internal thread section is concave outward to form an annular groove; the two heightened guard plates are spliced ​​together to form a complete annular groove; The outer peripheral wall of the bottom end of the casing is provided with an insertion section, and the insertion section is arranged along the circumference of the casing; The lifting device lifts the casing to ensure that the insertion section is located at the bottom; the annular groove of one heightened guard plate is manually inserted into the insertion section to ensure that the internal thread section on the heightened guard plate faces downward; the annular groove of another heightened guard plate is manually inserted into the insertion section, and the two heightened guard plates are manually connected to each other through a connecting assembly; S400, hoist the vertical steel cage, insert the vertical steel cage from the top of the casing and extend it to the inside of the steel pipe, and insert the bottom of the vertical steel cage into the bottom of the water; S500, injecting concrete into each steel pipe; S600, after the concrete solidifies, crush and remove the concrete in the casing; remove the first-order guard plate; S700, pouring beams; S800, lift the crossbeam, move the crossbeam from top to bottom to between the two casings, insert the transverse reinforcement cages leaking from both ends of the crossbeam into the openings of the casings; ensure that the transverse reinforcement cages do not interfere with the vertical reinforcement cages; S900, inserting a second-order guard plate at the opening of the casing, wherein the bottom of the second-order guard plate contacts the upper surface of the beam; S1000, pouring concrete in casing; S2000, wait for the concrete to solidify before removing the second-stage guard plate and casing.

2. The method for installing a bridge tie beam without cofferdam in water according to claim 1 is characterized in that: The specific steps of S100 include: Insert the end of the transverse reinforcement cage into the vertical reinforcement cage. When interference occurs, adjust the steel bar spacing of the transverse reinforcement cage or the vertical reinforcement cage to ensure that no interference occurs after the end of the transverse reinforcement cage is inserted into the vertical reinforcement cage.

3. The method for installing a bridge tie beam in water without cofferdam according to claim 1 is characterized in that: The specific steps of step S200 are: Lift the first steel pipe and insert it from top to bottom into the water bottom of the construction location; Lift the second steel pipe and insert it from top to bottom into the water bottom of the construction location.

4. The method for installing a bridge tie beam in water without cofferdam according to claim 3 is characterized in that: The specific steps of S300 are: Lift the first casing and drop it from top to bottom to the top of the first steel pipe, adjust the first casing so that the position of the first-step guard plate on the first casing faces the second steel pipe, and ensure that the first casing is coaxial with the first steel pipe; Connecting the first casing to the first steel pipe; Lift the second casing and drop it from top to bottom to the top of the second steel pipe, adjust the second casing so that the position of the first-step guard plate on the second casing faces the first casing, and ensure that the second casing is coaxial with the second steel pipe; connect the second casing with the second steel pipe.

5. The method for installing a bridge tie beam in water without cofferdam according to claim 1 is characterized in that: In the step S400, the bottom of the vertical steel cage is inserted into the water bottom, and the vertical steel cage is rotated.

6. The method for installing a bridge tie beam in water without cofferdam according to claim 1, characterized in that: The specific steps of S700 are: Set up formwork at the bottom, both sides and ends of the transverse reinforcement; pour concrete in the area formed by the formwork, and remove the formwork after the concrete solidifies.

7. The method for installing a bridge tie beam in water without cofferdam according to claim 1, characterized in that: The specific steps of S800 are: Connect the crane to the prefabricated lifting ears of the beam, lift the beam, move the beam from top to bottom between the two casings, overlap the bottom of the beam on the top of the corresponding steel pipe, and insert the transverse steel cage leaking from both ends of the beam into the openings of the first casing and the second casing respectively; adjust the transverse steel cage to avoid interference between the transverse steel cage and the vertical steel cage.

8. The method for installing a bridge tie beam in water without cofferdam according to claim 1, characterized in that: The specific steps of S1000 are: Pour the concrete from the top of the casing and stop pouring when the top of the concrete is flush with the top of the beam.

9. The method for installing a bridge tie beam in water without cofferdam according to claim 1, characterized in that: The specific steps of S2000 are: After waiting for the concrete to solidify, remove the second-order guard plate first, and then lift the casing from bottom to top.

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