Arch bridge suspender replacement construction method

Abstract

The invention relates to an arch bridge suspender replacement construction method, and belongs to the field of bridge construction.The arch bridge suspender replacement construction method comprises the steps that S100, a temporary hanging system is installed; s200, the old suspender is dismantled; s300, a new suspender is installed; s400, a new suspender is tensioned; and S500, the temporary bag hanging system and the sealing anchor are dismantled. The step S100 comprises the steps that S110, anchor sealing concrete is dismantled; s120, an on-arch supporting beam platform is arranged; s130, a hole is drilled in the bridge body; s140, a bridge body lower platform is arranged; s141, rubber cushion blocks are pasted between the lofting hole sites at the bottom of the bridge body; s142, a bottom cross beam structure is installed at the bottom of the rubber cushion block; and S150, the lower platform of the bridge body is connected with the arch crown through twisted steel bars. Wherein the step S200 comprises the following steps: cutting off an old suspender; crushing the upper anchor head and the lower anchor head; removing the old suspender; wherein the step S300 comprises the steps of hoisting a new suspender and installing the new suspender to a preset position; the step S400 comprises the steps that an upper anchor head is installed on the top of a new suspender; a tensioning structure is installed at the bottom end of the new suspender; and the new suspender is tensioned.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method for replacing arch bridge hangers. Background Art

[0002] As an important bridge structure, the stability and safety of arch bridges are crucial to transportation. As an important part of arch bridges, hangers are responsible for connecting the arch ribs and the bridge deck, and their status directly affects the overall performance of the bridge. However, due to the long-term load and environmental factors (such as wind, rain, corrosion, etc.), hangers may be damaged, fatigued or even broken, which seriously threatens the safety of the bridge.

[0003] Therefore, in the existing arch bridge hanger replacement construction method, the construction period is long, the cost is high, the construction is inconvenient, and because the work is done on the bridge, it is easy to cause risks such as falling. Summary of the invention

[0004] In view of the shortcomings existing in the related art, the present invention provides a construction method for replacing the hanger of an arch bridge, which can replace the hanger quickly and stably through the entire construction process. In particular, in the process of pasting the rubber pad, the entire process does not require personnel to go to the lower surface of the bridge body for construction, and does not require the setting of scaffolding or personnel to hang in the air for work, which improves the construction speed, saves costs and avoids the risk of personnel falling. This solves the technical problems of high cost and risk of falling in the prior art.

[0005] The present invention provides an arch bridge hanger rod replacement construction method, comprising:

[0006] S100, temporary hoisting system installation;

[0007] S110, dismantling the anchor sealing concrete; chiseling away the upper anchor head anchor sealing concrete and the lower anchor head anchor sealing concrete at the arch top and arch bottom to form a receiving cavity, so that the anti-loosening parts and the anchor plates are exposed in the receiving cavity;

[0008] S120, setting a supporting beam platform on the arch;

[0009] S130, drilling holes in the bridge body;

[0010] S140, set up a platform under the bridge;

[0011] S141, affixing rubber pads between the set-out holes at the bottom of the bridge body; specifically, passing the drop line through each hole, and the bottom of the drop line reaches the transport ship; after the drop line reaches the transport ship, a hanging basket is set on the drop line, a rubber pad is installed in the hanging basket, and glue is applied on the top of the rubber pad, and the top of the rubber pad is higher than the top of the hanging basket; when the top of the rubber pad contacts the lower surface of the bridge body and is bonded, the drop line is manually lowered, and the rubber pad is separated from the bridge body at this time, and after the hanging basket reaches the transport ship, the drop line and the hanging basket are manually separated;

[0012] S142, install the bottom crossbeam structure at the bottom of the rubber pad;

[0013] S150, connect the lower platform of the bridge body to the arch through threaded steel bars;

[0014] S200, dismantle the old boom;

[0015] S210, cut off the old boom;

[0016] S220, breaking the upper and lower anchor heads;

[0017] S230, remove the old boom;

[0018] S300, install new boom;

[0019] S310, lifting a new boom and installing the new boom to a preset position;

[0020] S400, tensioning new suspenders;

[0021] S410, install the anchor head on the top of the new boom;

[0022] S420, install the tension structure at the bottom end of the new boom;

[0023] S430, tensioning the new suspension rod by means of the tensioning structure;

[0024] S500, dismantle the temporary hoisting system and seal the anchor.

[0025] In some embodiments, the specific step of S120 includes S121 casting a vault platform. The step of S121 is to cast the vault platforms on both sides of the accommodating cavity on the vault; ensure that the upper surfaces of the two vault platforms are at the same level;

[0026] Step S121 also includes step S122, manually carrying the top steel pad and laying the top steel pad on the upper surface of the corresponding arch platform;

[0027] After step S122, the method further includes step S123 of installing a top steel beam on the top of the top steel base plate.

[0028] In some embodiments, step S130 includes step S131, according to the coordinates required by the design drawing, using a total station to determine the center cross line of the boom sitting position. According to the design drawing, mark the position below the corresponding top steel beam end;

[0029] Step S131 also includes step S132, in which a worker uses a drilling device to drill a hole vertically downward at the mark on the surface of the bridge body until the hole penetrates the bridge body.

[0030] In some embodiments, the specific steps of step S142 are: passing four drop wires through four holes on the bridge body respectively; lowering the drop wires until the bottom of the drop wires reaches the transport ship or scaffolding, and personnel on the transport ship or scaffolding set two second lower cross beams parallel to each other; manually placing the first lower cross beam horizontally above the two second lower cross beams;

[0031] Manually connect the end of the dropped line with the end of the corresponding second lower beam; pull the dropped line, and the two second lower beams and the first lower beam are lifted upward; until the top of the first lower beam contacts the lower surface of the rubber pad.

[0032] In some embodiments, in step S142, after the top of the first lower beam contacts the lower surface of the rubber pad;

[0033] The threaded steel bars are manually inserted through the holes. After the threaded steel bars are respectively inserted through the prefabricated holes at the ends of the second lower cross beam, a fastening nut is manually sleeved on the bottom end of the threaded steel bars and threadedly connected.

[0034] In some embodiments, in step S142, after the top of the first lower beam contacts the lower surface of the rubber pad;

[0035] The threaded steel bar is manually passed through the hole of the bridge body and then contacts with the corresponding threaded hole of the second lower cross beam, and the threaded steel bar is rotated to realize the threaded connection between the threaded steel bar and the second lower cross beam.

[0036] In some of the embodiments, step S150 specifically includes S151, in which tensioning jacks are installed at both ends of the upper surface of the top steel beam manually or by equipment, a tensioning oil pump is installed on the top steel beam, and the tensioning oil pump is connected to the tensioning jack;

[0037] Step S150 also includes step S152, in which the top end of each threaded steel bar is manually passed through the prefabricated hole of the top steel beam and through the tensioning jack; the tensioning jack is connected to the corresponding threaded steel bar;

[0038] Step S150 also includes step S153, in which the tensioning jack is manually started to pull the threaded steel bar toward the top through the tensioning jack; the upper surface of the bridge body is observed by the total station, and when the upper surface of the bridge body is 1 to 2 mm higher than the design elevation, the tensioning jack is stopped.

[0039] In some of the embodiments, the specific steps of step S310 are: vertically drilling a through hole on the bridge body at a predetermined position according to the drawing using a drilling tool;

[0040] A lifting device is used to pass the sling from the top to the bottom through the accommodation cavity of the arch, and then the sling passes through the through hole of the bridge body and reaches the transport ship on the water surface; the workers on the transport ship connect the top of the new boom on the transport ship with the sling;

[0041] The lifting equipment is put into operation to lift the new boom from bottom to top so that the top of the new boom passes through the bridge body and the arch in sequence; when the spherical pad at the bottom of the new boom abuts against the bottom wall of the bridge body, adjust the spherical nut at the bottom end of the new boom to change the relative position of the spherical nut and the spherical pad so that the bottom end position of the boom meets the design requirements.

[0042] In some embodiments, the specific steps of step S410 are: manually putting the new protective tube on the top of the new suspension rod, and manually dropping the new protective tube so that the bottom end of the new protective tube is supported in the accommodation cavity of the arch;

[0043] Workers pass each steel strand through the corresponding anchor hole on the anchor plate. After all the steel strands have passed through the anchor holes, they manually place the anchor plate on the top of the new protective pipe. They use equipment or manually insert clips at the top of each steel strand passing through the anchor hole. They pre-tighten each steel strand through the tensioning anchoring equipment so that the clips can enter the gap between the anchor hole and the steel strand.

[0044] In some of the embodiments, the specific steps of step S420 are: manually installing a tensioning foot at the bottom of the bridge body; installing a tensioning jack at the bottom of the tensioning foot; one end of the tensioning jack abuts against the tensioning foot; a tensioning rod is passed through the tensioning jack, and the top end of the tensioning rod is connected to the bottom end of the suspension rod; manually threading a tensioning nut on the tensioning rod, so that the top end of the tensioning nut abuts against the end of the tensioning jack away from the tensioning foot.

[0045] Based on the above technical solution, in the embodiment of the present invention, the suspension rod can be replaced quickly and stably through the entire construction process. In particular, in the process of pasting the rubber pad, the entire process does not require personnel to go to the lower surface of the bridge body for construction, and does not require the setting of scaffolding or personnel to hang high in the air for work, which improves the construction speed, saves costs and avoids the risk of personnel falling. This solves the technical problems of high cost and risk of falling in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] 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:

[0047] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the construction method for replacing the hanger rod of an arch bridge of the present invention;

[0048] Figure 2 It is a front view of an embodiment of the arch bridge hanger replacement construction method of the present invention;

[0049] Figure 3 A construction flow chart of an embodiment of the arch bridge hanger replacement construction method of the present invention;

[0050] Figure 4 A specific construction flow chart of an embodiment of the arch bridge hanger replacement construction method of the present invention;

[0051] Figure 5 The present invention is a construction flow chart of setting a platform under the bridge body according to an embodiment of the arch bridge hanger replacement construction method of the present invention.

[0052] In the figure:

[0053] 100, bridge body; 200, arch; 300, arch top platform; 400, top steel pad; 500, top steel beam; 600, threaded steel bar; 700, rubber pad; 800, first lower beam; 900, second lower beam; 110, tensioning foot; 120, tensioning rod. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Please refer to all the drawings, in an illustrative embodiment of the arch 200 bridge suspender replacement construction method of the present invention, the bridge includes an arch 200 and a bridge body 100. The top surface of the arch 200 is the top of the arch 200. The ground of the arch 200 is the bottom of the arch 200. The upper surface of the bridge body 100 is the bridge deck.

[0059] The two ends of the suspension rod are respectively connected to the top of the arch 200 and the bridge body 100. Among them, the structure at the top of the suspension rod sealed in the arch 200 and used to connect with the arch 200 is the upper anchor head. The structure at the bottom of the suspension rod used to connect with the bridge body 100 is the lower anchor head.

[0060] The boom includes a plurality of steel strands.

[0061] The structure of the upper anchor head and the lower anchor head includes a protective tube, a loosening prevention member and an anchor plate. The protective tube is sleeved on the suspension rod, the anchor head pad is arranged at the end of the sleeve, and the steel strand of the suspension rod passes through the anchor head pad. The steel strand is locked on the anchor head pad by the loosening prevention member to realize the anchor head structure.

[0062] In this application, the arch 200 bridge hanger replacement construction method includes:

[0063] S000. Preparation.

[0064] In some embodiments, the specific steps in the preparation work of step S000 include S010: moving the total station, ink line, top steel pad 400, mortar, electric pick and other tools and materials to the construction position on the bridge body 100 manually or by vehicle.

[0065] In some embodiments, the preparation work of step S000 further includes step S020: placing tools and materials such as a new boom on a transport ship, and driving the transport ship to the water surface below the construction location.

[0066] In some embodiments, the preparation work of step S000 further includes a specific step S030: driving the lifting vessel to the water surface below the construction location.

[0067] In some embodiments, step S030 can be replaced by: driving a crane to the construction location of the bridge body 100 .

[0068] In some embodiments, step S000 may further include setting up a scaffold in the construction area of ​​the bridge body 100. It is worth noting that the scaffold is not necessary, and whether to install the scaffold may be selected according to a subsequent construction plan.

[0069] In some embodiments, step S100 follows the preparation work in step S000 .

[0070] Among them, step S100 is the installation of a temporary hanging system.

[0071] In some embodiments, step S100 includes step S110. Step S110 is to remove the anchoring concrete.

[0072] In some embodiments, the specific steps of step S110 are to chisel out the upper anchor head sealing concrete and the lower anchor head sealing concrete at the top and bottom of the arch 200 to form a receiving cavity, so that the anti-loosening part and the anchor plate are exposed in the receiving cavity.

[0073] Furthermore, in step S110, an electric pick is used to work on the arch 200 to remove the upper anchor head sealing concrete and the lower anchor head sealing concrete.

[0074] In some embodiments, in step S100, step S120 is further included after step S110. Step S120 is to set a supporting beam platform on the arch 200.

[0075] In some embodiments, the specific steps of step S120 include S121 casting the vault platform 300. The step S121 is to cast the vault platform 300 on both sides of the accommodation cavity on the top of the arch 200. Ensure that the upper surfaces of the two vault platforms 300 are at the same level.

[0076] Further, in step S121, the specific steps are as follows: molds are manually set on both sides of the accommodation cavity on the top of the arch 200 along the length direction of the bridge body 100. Concrete or mortar is manually poured into the mold using pouring equipment, and the mold is removed after the concrete or mortar solidifies.

[0077] In some embodiments, step S120 further includes step S122 after step S121 . Step S122 is to install the top steel plate 400 on the arch platform 300 .

[0078] Furthermore, the specific steps of step S122 are to manually carry the top steel pad 400 and lay the top steel pad 400 on the corresponding upper surface of the arch platform 300 .

[0079] In another embodiment, the specific steps of step S122 can be replaced by lifting the top steel plate 400 by a lifting device, moving the top steel plate 400 to above the corresponding arch platform 300, lowering the top steel plate 400, and laying the top steel plate 400 on the upper surface of the corresponding arch platform 300.

[0080] In another embodiment, the specific steps of step S122 can be replaced by lifting the top steel plate 400 by a lifting device, moving the top steel plate 400 to above the corresponding arch platform 300, manually removing the top steel plate 400 and laying the top steel plate 400 on the corresponding upper surface of the arch platform 300.

[0081] In some embodiments, in step S120 , step S123 is further included after step S122 . S123 is to install the top steel beam 500 on the top of the top steel backing plate 400 .

[0082] In some embodiments, the specific steps of step S123 are: manually carrying the top steel beam 500, and placing the top steel beam 500 horizontally on the upper surface of the corresponding top steel pad 400. Ensure that the two top steel beams 500 are parallel to each other.

[0083] In another embodiment, the specific steps of step S123 can be replaced by lifting the top steel beam 500 by a lifting device, moving the top steel beam 500 to the top of the corresponding arch platform 300, lowering the top steel beam 500, and laying the top steel beam 500 on the upper surface of the corresponding top steel pad 400. Ensure that the two top steel beams 500 are parallel to each other.

[0084] In another embodiment, the specific steps of step S123 can be replaced by lifting the top steel beam 500 by a lifting device, moving the top steel beam 500 to the top of the corresponding vault platform 300, manually removing the top steel beam 500 and laying the top steel beam 500 on the upper surface of the corresponding top steel pad 400. Ensure that the two top steel beams 500 are parallel to each other.

[0085] In some embodiments, step S100 includes step S130 . Step S130 is to drill a hole in the bridge body 100 .

[0086] In some embodiments, step S130 includes step S131 , where step S131 is to lay out hole positions on the upper surface of the bridge body 100 .

[0087] Further, the specific steps of step S131 are: according to the coordinates required by the design drawing, the center cross line of the suspension rod sitting position is determined by a total station. According to the design drawing, the position below the end of the corresponding top steel beam 500 is marked.

[0088] In another embodiment, the specific steps of step S131 can be replaced by: a laser emitting device is set on the lower surface of each end of the top steel beam 500 extending out of the top steel pad 400, and the laser is irradiated vertically downward by the laser emitting device, and the surface of the bridge body 100 is manually marked according to the laser irradiation points.

[0089] It is worth noting that the laser emitting device can be a transmitter or a laser pen, which can be directly installed on the top steel beam 500 or can be manually controlled by hand.

[0090] Among them, the marking process can use a marker pen, ink line, graphite stick, etc.

[0091] In some embodiments, in step S130, step S132 is further included after step S131. In step S132, a worker uses a drilling device to drill a hole vertically downward at the mark on the surface of the bridge body 100 until the bridge body 100 is penetrated.

[0092] It is worth noting that there are four ends of the top steel cross beam 500 extending out of the top steel pad 400. Therefore, there are also four holes for lofting. The four holes are preferably distributed at the four corners of the rectangle.

[0093] In some embodiments, the drilling equipment includes but is not limited to a drill, an electric pick, etc.

[0094] In some embodiments, step S100 includes step S140. Step S140 is to set a lower platform of the bridge body 100.

[0095] In some embodiments, step S140 includes step S141 , and step S141 is pasting rubber pads 700 between the planed holes at the bottom of the bridge body 100 .

[0096] Furthermore, the specific steps of step S141 are to manually hold and stick the rubber pad 700 through a lifting device of the ship under the bridge body 100.

[0097] In another embodiment, the specific steps of step S141 can be replaced by: Pass the drop wire through each hole, the bottom of the drop wire reaches the transport ship, and the rubber pad 700 is manually connected to the drop wire, and glue is applied on the top of the rubber pad 700. Pull the drop wire to move the rubber pad 700 upward until the top of the rubber pad 700 is attached to the bridge body 100 to achieve bonding.

[0098] It is worth noting that after the drop line reaches the transport ship, a hanging basket can be set on the drop line, and a rubber pad 700 is installed in the hanging basket, and the top of the rubber pad 700 is coated with glue. The top of the rubber pad 700 is higher than the top of the hanging basket. When the top of the rubber pad 700 contacts the lower surface of the bridge body 100 and is bonded, the drop line is manually lowered, and the rubber pad 700 is separated from the bridge body 100. After the hanging basket reaches the transport ship, the drop line and the hanging basket are manually separated. The worker can lift the drop line again.

[0099] This method is convenient and quick, and is easy to operate, and does not require manual operation to reach the bottom of the bridge body 100 for operation. The dropped wire does not need to be cut short, and the dropped wire can be reused. It is easy to operate.

[0100] In another embodiment, the specific steps of step S141 can be replaced by: Manually entering under the bridge body 100 through a scaffolding set at the construction site of the bridge body 100, and manually pasting the rubber pad 700.

[0101] In some embodiments, the rubber pad 700 may be provided with a first avoidance cavity for avoiding the position of the subsequent installation of the new suspension rod to avoid affecting the installation of the new suspension rod. Alternatively, there may be two rubber pads 700, which are spaced apart to avoid the position of the new suspension rod.

[0102] In some embodiments, step S141 further includes step S142 , in which step S142 is to install a bottom crossbeam structure at the bottom of the rubber pad 700 .

[0103] Furthermore, the specific steps of step S142 are as follows: pass the four drop lines through the four holes on the bridge body 100 respectively. Lower the drop lines until the bottom end of the drop lines reaches the transport ship or scaffolding, and the personnel on the transport ship or scaffolding set the two second lower cross beams 900 parallel to each other. Manually place the first lower cross beam 800 horizontally above the two second lower cross beams 900 to ensure that the length directions of the first lower cross beam 800 and the second lower cross beam 900 are perpendicular to each other. Manually connect the end of the drop line with the corresponding end of the second lower cross beam 900. Pull the drop line, and the two second lower cross beams 900 and the first lower cross beam 800 are lifted upward. Until the top of the first lower cross beam 800 contacts the lower surface of the rubber pad 700.

[0104] The threaded steel bar 600 is manually inserted through the hole. After the threaded steel bar 600 passes through the prefabricated holes at the ends of the second lower cross beam 900, a fastening nut is manually sleeved and threadedly connected at the bottom end of the threaded steel bar 600.

[0105] It is worth noting that when there is no scaffolding, the threaded steel bar 600 can be reached manually through the lifting equipment on the ship and the fastening nut can be installed. When there is a scaffolding, the fastening nut can be installed directly on the scaffolding manually.

[0106] In another embodiment, the specific steps of step S142 are to pass the four drop wires through the four holes on the bridge body 100 respectively. The drop wire is lowered until the bottom end of the drop wire reaches the transport ship, and a hanging basket is manually set on the drop wire. The personnel on the transport ship set the two second lower cross beams 900 parallel to each other in the hanging basket. The first lower cross beam 800 is manually placed above the two second lower cross beams 900 to ensure that the length directions of the first lower cross beam 800 and the second lower cross beam 900 are perpendicular to each other. The drop wire is lifted, and the statue drives the hanging basket, the first lower cross beam 800 and the second lower cross beam 900 to rise. After the second lower cross beam 900 is manually connected through the threaded steel bar 600, the drop wire is manually lowered, and after the hanging basket reaches the transport ship, the drop wire and the hanging basket are manually separated. The worker can lift the drop wire again.

[0107] This method is convenient and quick, and the operation is simple, and there is no need for manual operation at the bottom of the bridge body 100. The dropped wire does not need to be cut short, and the dropped wire can be reused.

[0108] In another embodiment, the prefabricated hole of the second lower cross beam 900 is a threaded hole. The threaded steel bar 600 is manually passed through the hole of the bridge body 100 to contact the corresponding threaded hole of the second lower cross beam 900, and the threaded steel bar 600 is rotated to achieve the threaded connection between the threaded steel bar 600 and the second lower cross beam 900. It does not require the setting of scaffolding or manual installation of fastening nuts, which improves construction efficiency and reduces danger.

[0109] In another embodiment, a through hole is prefabricated on the threaded steel bar 600. In step S142, before the four drop wires are respectively passed through the four holes on the bridge body 100, the step of manually passing the drop wires through the through holes on the threaded steel bar 600 is also included.

[0110] With this solution, the threaded steel bar 600 and the drop line share a through hole on the bridge body 100 without mutual interference. When the drop line is connected to the second lower cross beam 900, the threaded steel bar 600 is passed through the corresponding through hole of the bridge body 100 along the drop line. After the threaded steel bar 600 is connected to the corresponding second lower cross beam 900, the drop line will not be unable to be pulled out because the threaded steel bar 600 occupies the space of the through hole on the bridge body 100.

[0111] In some embodiments, the first lower cross beam 800 may be vertically penetrated with a second avoidance cavity to avoid the position of the subsequent installation of a new suspension rod, so as to avoid affecting the installation of the new suspension rod. Alternatively, there may be two first lower cross beams 800, which are spaced apart to avoid the position of the new suspension rod.

[0112] It is worth noting that in step S100 , steps S130 and S140 may precede steps S110 and S120 .

[0113] In some embodiments, step S140 is followed by step S150 , in which the lower platform of the bridge body 100 is connected to the top of the arch 200 by means of threaded steel bars 600 .

[0114] In some embodiments, step S150 specifically includes S151, in which tensioning jacks are installed manually or by equipment at both ends of the upper surface of the top steel beam 500, a tensioning oil pump is installed on the top steel beam 500, and the tensioning oil pump is connected to the tensioning jacks.

[0115] It is worth noting that step S151 can be performed after step S120.

[0116] In some embodiments, step S150 further includes step S152, in which the top end of each threaded steel bar 600 is manually passed through the prefabricated hole of the top steel beam 500 and through the tensioning jack, and the tensioning jack is connected to the corresponding threaded steel bar 600.

[0117] It is worth noting that step S152 can be completed before or after step S142.

[0118] In some embodiments, step S150 further includes step S153, in which the tensioning jack is manually started to pull the threaded steel bar 600 toward the top through the tensioning jack. The upper surface of the bridge body 100 is observed by a total station, and when the upper surface of the bridge body 100 is 1 to 2 mm higher than the design elevation, the tensioning jack is stopped.

[0119] It is worth noting that step S153 is the last step in S100.

[0120] In some embodiments, step S100 is followed by step S200. Step S200 is to remove the old suspension rod.

[0121] In some embodiments, step S200 includes step S210, and step S210 is cutting off the old suspension rod.

[0122] Furthermore, in step S210, the worker cuts from the periphery of the old boom toward the center of gravity of the boom by oxygen cutting.

[0123] In some embodiments, the specific steps of step S210 are: wrapping the foam layer and the sponge layer on the peripheral wall of the old suspension rod in sequence, and using a hemp rope to wrap the outermost sponge layer around the old suspension rod in a winding manner. Then the worker uses oxygen cutting to cut from the periphery of the old suspension rod to the center of gravity of the suspension rod.

[0124] The prestress on the old boom is absorbed by the foam layer, sponge layer and hemp rope, so as to avoid injury caused by the release of prestress after cutting and breaking.

[0125] In some embodiments, in step S200, step S210 is followed by step S220. Step S220 is to break the upper anchor head and the lower anchor head.

[0126] Furthermore, the specific steps of step S220 are as follows: the worker uses an electric hammer to chisel off the upper surface of the bridge body 100 at the bottom end of the suspension rod, and integrally crushes the lower anchor head in the bridge body 100. The worker uses an electric hammer to integrally crush the upper anchor head in the accommodation cavity.

[0127] In some embodiments, step S200 further includes step S230, and step S230 is removing the old suspension rod.

[0128] Furthermore, the specific steps of step S230 are: manually cleaning the waste residue, manually using a tensioning jack to connect the cut lower half of the old suspension rod, and lifting the lower half of the old suspension rod upward, and manually using a tensioning jack to connect the upper half of the old suspension rod, and lifting the upper half of the old suspension rod downward.

[0129] It is worth noting that in step S230, during the use of the tensioning jack, it can contact the bridge body 100 and the arch 200 to complete the work.

[0130] In some embodiments, step S200 is followed by step S300. Step S300 is to install a new suspension rod.

[0131] In some embodiments, step S300 includes step S310, and step S310 is to lift a new boom and install the new boom to a preset position.

[0132] Furthermore, the specific steps of step S310 are: vertically drilling through holes on the bridge body 100 at predetermined positions according to the drawings by using a drilling tool.

[0133] A lifting device is used to pass the sling from the top of the arch 200 through the receiving cavity from top to bottom, and the sling passes through the through hole of the bridge body 100 to the transport ship on the water surface. The workers on the transport ship connect the top of the new boom on the transport ship with the sling.

[0134] The lifting equipment is operated to lift the new suspension rod from bottom to top, so that the top of the new suspension rod passes through the bridge body 100 and the arch 200 in sequence. When the spherical pad at the bottom of the new suspension rod abuts against the bottom wall of the bridge body 100, the spherical nut at the bottom of the new suspension rod is adjusted to change the relative position of the spherical nut and the spherical pad, so that the bottom end position of the suspension rod meets the design requirements.

[0135] It is worth noting that the bottom end of the new boom can be measured by a total station or a ruler. When the bottom end of the boom reaches a position that meets the design requirements, the workers stop working.

[0136] In some embodiments, step S300 is followed by step S400. Step S400 is to tension a new suspension rod.

[0137] In some embodiments, step S400 includes S410, and step S410 is to install an anchor head on the top of the new boom.

[0138] Furthermore, the specific steps of step S410 are: manually putting the new protective tube on the top of the new suspension rod, and manually dropping the new protective tube so that the bottom end of the new protective tube is supported in the accommodating cavity of the arch 200 .

[0139] Workers pass each steel strand through the corresponding anchor hole on the anchor plate. After all the steel strands pass through the anchor holes, the anchor plate is manually placed on the top of the new protective pipe. A clip is manually inserted into the top of each steel strand through the anchor hole using equipment or manually. Each steel strand is pre-tightened by tensioning and anchoring equipment so that the clip enters the gap between the anchor hole and the steel strand to achieve the connection between the new protective pipe and the new hanger. Anti-loosening parts are manually installed on the top of each steel strand to prevent the clip from loosening from the anchor hole and ensure the connection strength between the top of the steel strand and the sheath.

[0140] It is worth noting that in step S410, mortar can be manually injected into the new protective pipe to achieve the connection between the new hanger and the new protective pipe.

[0141] In some embodiments, step S400 further includes step S420, and step S420 is performed after step S410. Step S420 is to install a tension structure at the bottom end of the new suspension rod.

[0142] Furthermore, the specific steps of step S420 are: manually install the tensioning foot 110 at the bottom of the bridge body 100. Install a tensioning jack at the bottom of the tensioning foot 110. One end of the tensioning jack abuts against the tensioning foot 110. Pass a tensioning rod 120 through the tensioning jack, and connect the top end of the tensioning rod 120 to the bottom end of the suspension rod. Manually thread a tensioning nut on the tensioning rod 120, so that the top end of the tensioning nut abuts against one end of the tensioning jack away from the tensioning foot 110.

[0143] The tensioning legs 110 may be connected to the bottom of the bridge body 100 by bolts.

[0144] In some embodiments, step S400 further includes step S430, and step S430 is performed after step S420. Step S430 is to tension the new suspension rod by using the tensioning structure.

[0145] Furthermore, the specific steps of step S430 are: start the tensioning jack, and the tensioning jack drives the tensioning rod 120 to move downward. The tensioning value of the new suspension rod is detected by the detection equipment, and when the value reaches the set condition, the tensioning is stopped. Turn the ball nut to make the ball pad fit tightly against the bottom of the bridge body 100.

[0146] The principle of step S430 is that the top of the new suspension rod is fixed to the arch 200, and the bottom is pulled downward, and the new suspension rod is tensioned. At this time, because the new suspension rod is tensioned, the gap between the pad and the bottom of the bridge body 100 becomes larger, and the ball nut is rotated to make the ball pad fit again on the bottom wall of the bridge body 100, completing the tensioning of the new suspension rod.

[0147] Among them, the bottom end structure of the new hanger is the lower anchor head.

[0148] In some embodiments, step S400 further includes step S500. Step S500 is to dismantle the temporary hanging system and seal the anchor.

[0149] Furthermore, the specific steps of step S500 are to remove the tension rod 120, the tension jack, the tension support leg 110, the second crossbeam, the first crossbeam, and the threaded steel bar 600 in sequence.

[0150] The upper and lower anchor heads are treated with anti-corrosion and anti-vibration treatment. The upper and lower protective covers are installed on the upper and lower anchor heads respectively.

[0151] Mortar or concrete is injected into the accommodation cavity of the arch 200 to fill the accommodation cavity of the arch 200 to achieve anchor sealing.

[0152] The holes created when the bridge body 100 is chiseled out are injected with mortar or concrete to fill the accommodation cavity of the arch 200, thereby achieving anchor sealing.

[0153] Through the description of multiple embodiments of the arch 200 bridge hanger replacement construction method of the present invention, it can be seen that the arch 200 bridge hanger replacement construction method embodiment of the present invention has at least one or more of the following advantages:

[0154] 1. The rubber block is hoisted by a hanging basket, and there is no need for personnel to go to the lower surface of the bridge body 100 for construction, and there is no need to set up scaffolding or personnel to hang at high altitude for work, which improves the construction speed, saves costs and avoids the risk of personnel falling; the dropped line does not need to be cut short and can be reused.

[0155] 2. Manually set a hanging basket on the drop line, and the personnel on the transport ship set the two second lower beams 900 parallel to each other on the hanging basket. Manually place the first lower beam 800 horizontally above the two second lower beams 900 to ensure that the length directions of the first lower beam 800 and the second lower beam 900 are perpendicular to each other. Lift the drop line, and the statue drives the hanging basket, the first lower beam 800 and the second lower beam 900 to rise. After manually connecting the second lower beam 900 through the threaded steel bar 600, the drop line is manually lowered. After the hanging basket reaches the transport ship, the drop line and the hanging basket are manually separated. Workers can lift the drop line again. This method is convenient and fast, and the operation is simple. It does not require manual operation to reach the bottom of the bridge body 100 for operation, and does not require the setting of scaffolding or personnel to hang high-altitude operations, which improves the construction speed, saves costs and avoids the risk of personnel falling. The drop line does not need to be shortened, and the drop line can be reused.

[0156] 3. The threaded steel bar 600 is prefabricated with through holes. In step S142, before the four dropped wires are respectively passed through the four holes on the bridge body 100, the step of manually passing the dropped wires through the through holes on the threaded steel bar 600 is also included. When the threaded steel bar 600 and the dropped wires share a through hole on the bridge body 100, no mutual interference will occur. While the dropped wires are connected to the second lower cross beam 900, the threaded steel bar 600 is passed through the corresponding through hole of the bridge body 100 along the dropped wires. After the threaded steel bar 600 is connected to the corresponding second lower cross beam 900, the dropped wires will not be unable to be pulled out because the threaded steel bar 600 occupies the space of the through hole on the bridge body 100.

[0157] 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.

[0158] 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 construction method for replacing an arch bridge hanger, characterized in that: include: S100, temporary hoisting system installation; S110, dismantling the anchor sealing concrete; chiseling away the upper anchor head anchor sealing concrete and the lower anchor head anchor sealing concrete at the arch top and arch bottom to form a receiving cavity, so that the anti-loosening parts and the anchor plates are exposed in the receiving cavity; S120, setting a supporting beam platform on the arch; S130, drilling holes in the bridge body; S140, set up a platform under the bridge; S141, affixing rubber pads between the set-out holes at the bottom of the bridge body; specifically, passing the drop line through each hole, and the bottom of the drop line reaches the transport ship; after the drop line reaches the transport ship, a hanging basket is set on the drop line, a rubber pad is installed in the hanging basket, and glue is applied on the top of the rubber pad, and the top of the rubber pad is higher than the top of the hanging basket; when the top of the rubber pad contacts the lower surface of the bridge body and is bonded, the drop line is manually lowered, and the rubber pad is separated from the bridge body at this time. After the hanging basket reaches the transport ship, the drop line and the hanging basket are manually separated; S142, install the bottom crossbeam structure at the bottom of the rubber pad; S150, connect the lower platform of the bridge body to the arch through threaded steel bars; S200, dismantle the old boom; S210, cut off the old boom; S220, breaking the upper and lower anchor heads; S230, remove the old boom; S300, install new boom; S310, lifting a new boom and installing the new boom to a preset position; S400, tensioning new suspenders; S410, install the anchor head on the top of the new boom; S420, install the tension structure at the bottom end of the new boom; S430, tensioning the new suspension rod by means of the tensioning structure; S500, dismantle the temporary hoisting system and seal the anchor.

2. The arch bridge hanger rod replacement construction method according to claim 1 is characterized in that: The specific steps of S120 include S121 casting a vault platform; the step of S121 is to cast the vault platforms on both sides of the accommodating cavity on the vault; and ensure that the upper surfaces of the two vault platforms are on the same horizontal plane; Step S121 also includes step S122, manually carrying the top steel pad and laying the top steel pad on the upper surface of the corresponding arch platform; After step S122, the method further includes step S123 of installing a top steel beam on the top of the top steel base plate.

3. The arch bridge hanger rod replacement construction method according to claim 1 is characterized in that: Step S130 includes step S131, according to the coordinates required by the design drawing, using a total station to determine the center cross line of the boom sitting position; marking the position below the end of the top steel beam corresponding to the design drawing; Step S131 also includes step S132, in which a worker uses a drilling device to drill a hole vertically downward at the mark on the surface of the bridge body until the hole penetrates the bridge body.

4. The arch bridge hanger rod replacement construction method according to claim 1, characterized in that: The specific steps of step S142 are: passing the four drop wires through the four holes on the bridge body respectively; lowering the drop wires until the bottom ends of the drop wires reach the transport ship or the scaffolding, and the personnel on the transport ship or the scaffolding set the two second lower cross beams parallel to each other; manually placing the first lower cross beam horizontally above the two second lower cross beams; Manually connect the end of the dropped line with the end of the corresponding second lower beam; pull the dropped line, and the two second lower beams and the first lower beam are lifted upward; until the top of the first lower beam contacts the lower surface of the rubber pad.

5. The arch bridge hanger rod replacement construction method according to claim 4 is characterized in that: In step S142, after the top of the first lower cross beam contacts the lower surface of the rubber pad; The threaded steel bars are manually inserted through the holes. After the threaded steel bars are respectively inserted through the prefabricated holes at the ends of the second lower cross beam, a fastening nut is manually sleeved on the bottom end of the threaded steel bars and threadedly connected.

6. The arch bridge hanger rod replacement construction method according to claim 4, characterized in that: In step S142, after the top of the first lower cross beam contacts the lower surface of the rubber pad; The threaded steel bar is manually passed through the hole of the bridge body and then contacts with the corresponding threaded hole of the second lower cross beam, and the threaded steel bar is rotated to realize the threaded connection between the threaded steel bar and the second lower cross beam.

7. The arch bridge hanger rod replacement construction method according to claim 1, characterized in that: Step S150 specifically includes S151, in which tensioning jacks are installed at both ends of the upper surface of the top steel beam manually or by equipment, a tensioning oil pump is installed on the top steel beam, and the tensioning oil pump is connected to the tensioning jack; Step S150 also includes step S152, in which the top end of each threaded steel bar is manually passed through the prefabricated hole of the top steel beam and through the tensioning jack; the tensioning jack is connected to the corresponding threaded steel bar; Step S150 also includes step S153, in which the tensioning jack is manually started to pull the threaded steel bar toward the top through the tensioning jack; the upper surface of the bridge body is observed by the total station, and when the upper surface of the bridge body is 1 to 2 mm higher than the design elevation, the tensioning jack is stopped.

8. The arch bridge hanger rod replacement construction method according to claim 1, characterized in that: The specific steps of step S310 are: vertically drilling a through hole on the bridge body at a predetermined position according to the drawing using a drilling tool; A lifting device is used to pass the sling from the top to the bottom through the accommodation cavity of the arch, and then the sling passes through the through hole of the bridge body and reaches the transport ship on the water surface; the workers on the transport ship connect the top of the new boom on the transport ship with the sling; The lifting equipment is put into operation to lift the new boom from bottom to top so that the top of the new boom passes through the bridge body and the arch in sequence; when the spherical pad at the bottom of the new boom abuts against the bottom wall of the bridge body, adjust the spherical nut at the bottom end of the new boom to change the relative position of the spherical nut and the spherical pad so that the bottom end position of the boom meets the design requirements.

9. The arch bridge hanger rod replacement construction method according to claim 1, characterized in that: The specific steps of step S410 are: manually putting the new protective tube on the top of the new suspension rod, and manually dropping the new protective tube so that the bottom end of the new protective tube is supported in the accommodation cavity of the arch; Workers pass each steel strand through the corresponding anchor hole on the anchor plate. After all the steel strands have passed through the anchor holes, they manually place the anchor plate on the top of the new protective pipe. They use equipment or manually insert clips at the top of each steel strand passing through the anchor hole. They pre-tighten each steel strand through the tensioning anchoring equipment so that the clips can enter the gap between the anchor hole and the steel strand.

10. The arch bridge hanger rod replacement construction method according to claim 1, characterized in that: The specific steps of step S420 are: manually installing a tensioning leg at the bottom of the bridge body; installing a tensioning jack at the bottom of the tensioning leg; one end of the tensioning jack abuts against the tensioning leg; passing a tensioning rod through the tensioning jack, and connecting the top of the tensioning rod with the bottom end of the suspension rod; manually threading a tensioning nut on the tensioning rod, so that the top of the tensioning nut abuts against one end of the tensioning jack away from the tensioning leg.

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