Trestle lifting construction device and construction method

Abstract

The invention relates to the technical field of trestle lifting devices, in particular to a trestle lifting construction device and a construction method.The trestle lifting construction device comprises four lifting mechanisms; the lifting mechanism comprises four lifting steel pipe piles, two lifting cross beams, a winch, a pulley block fixing beam, a pulley block and a steel wire rope; the four lifting mechanisms are installed on the two sides of the trestle, the lifting steel pipe pile and the lifting cross beam serve as supports of the whole device, one end of the steel wire rope is installed on the winch, the other end of the steel wire rope is installed on the trestle, and the steel wire rope provides guidance through the pulley block. And the trestle is lifted for passing ships to navigate, so that the interference of the trestle on the navigation of the ships is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of trestle lifting devices, and in particular to a trestle lifting construction device and a construction method. Background Art

[0002] In recent years, with the continuous development of the transportation industry, bridge engineering has become a vital component of infrastructure such as highways and railways. The construction of technically complex bridges across rivers, streams, and even across the sea has increased significantly, leading to a leap in bridge construction technology. During construction projects, bridges across water are common. To accommodate vehicle traffic and water operations, temporary steel trestles are often constructed in the water to assist in bridge construction.

[0003] After the traditional steel trestle is erected, passing ships cannot pass through or have to take a detour, which has a significant impact on navigation in the waterway. Summary of the Invention

[0004] The purpose of the present invention is to provide a pier lifting construction device and a construction method, which can lift a steel pier to facilitate navigation of passing ships.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a trestle lifting construction device, comprising four lifting mechanisms;

[0006] The lifting mechanism includes four lifting steel pipe piles, two lifting beams, a winch, a pulley block fixing beam, a pulley block and a steel rope;

[0007] The two lifting beams are respectively fixedly arranged on the top of the two lifting steel pipe piles on the same side; the winch is fixedly connected to the lifting beam and is located on the top of the lifting beam; the pulley group fixed beam is fixedly arranged on the lifting beam; the pulley group is arranged on the pulley group fixed beam; the wire rope is arranged on the winch.

[0008] Wherein, the lifting mechanism further includes a plurality of connecting parts; the plurality of connecting parts are respectively fixedly arranged between two adjacent lifting steel pipe piles.

[0009] Wherein, the lifting mechanism further includes an operating platform; the operating platform is fixedly connected to the lifting beam and is located on the top of the lifting beam.

[0010] In a second aspect, the present invention further provides a trestle lifting construction method, comprising:

[0011] trestle construction;

[0012] Install four lifting mechanisms;

[0013] When there is a need for ship navigation, the lifting mechanism lifts the pier.

[0014] The specific steps of trestle construction include:

[0015] Pier steel pipe pile construction;

[0016] Horizontal parallel connection construction of steel pipe piles;

[0017] Construction of the main beam of the trestle;

[0018] installation of trestle Bailey beams;

[0019] Construction of trestle bridge deck system;

[0020] Installation of pier guardrails.

[0021] The present invention provides a pier lifting construction device and construction method, wherein four lifting mechanisms are installed on both sides of the pier, the lifting steel pipe piles and the lifting beam serve as supports for the entire device, one end of the steel wire rope is installed on the winch, and the other end is installed on the pier, and the steel wire rope is guided by the pulley block. When a passing ship needs to pass through, the winch reels in the steel wire rope, and the steel wire rope drives the pier to move upward, lifting the pier for passing ships to pass through, thereby avoiding interference of the pier with the navigation of ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0023] Figure 1 It is a front view of the trestle lifting construction device of the present invention.

[0024] Figure 2 It is a side view of the trestle lifting construction device of the present invention.

[0025] Figure 3 It is a top view of the trestle lifting construction device of the present invention.

[0026] Figure 4 It is a partial enlarged view of the trestle lifting construction device of the present invention.

[0027] Figure 5 It is a construction schematic diagram of a trestle of the present invention.

[0028] Figure 6 It is a construction schematic diagram of a trestle platform of the present invention.

[0029] Figure 7 It is a construction schematic diagram of the cage ladder of the present invention.

[0030] Figure 8 It is a construction schematic diagram of the crash pier of the present invention.

[0031] Figure 9 It is a flow chart of the trestle lifting construction method of the present invention.

[0032] Figure 10 It is the flow chart of trestle construction of the present invention.

[0033] 1-lifting mechanism, 2-lifting steel pipe pile, 3-lifting beam, 4-winch, 5-pulley block fixed beam, 6-pulley block, 7-wire rope, 8-connector, 9-operating platform, 10-steel pipe pile, 11-Bailey beam, 12-connecting system, 13-trestle panel, 14-guardrail, 15-trestle platform, 16-cage ladder, 17-anti-collision pier, 18-distribution beam, 19-trestle. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] First, see Figures 1-4 The present invention provides a pier lifting construction device, including four lifting mechanisms 1; the lifting mechanism 1 includes four lifting steel pipe piles 2, two lifting beams 3, a winch 4, a pulley block fixed beam 5, a pulley block 6, a steel wire rope 7, multiple connecting parts 8 and an operating platform 9; through the above scheme, the steel pier 19 can be lifted to facilitate navigation of passing ships.

[0036] In this embodiment, the two lifting beams 3 are fixedly mounted on top of the two lifting steel pipe piles 2 on the same side; the winch 4 is fixedly connected to the lifting beams 3 and located on top of the lifting beams 3; the pulley block fixing beam 5 is fixedly mounted on the lifting beams 3; the pulley block 6 is mounted on the pulley block fixing beam 5; and the wire rope 7 is mounted on the winch 4. Four lifting mechanisms 1 are mounted on either side of a pier 19. The lifting steel pipe piles 2 and the lifting beams 3 serve as support for the entire device. One end of the wire rope 7 is mounted on the winch 4 and the other end is mounted on the pier 19. The wire rope 7 is guided by the pulley block 6. When a passing ship needs to pass through, the winch 4 reels the wire rope 7, which drives the pier 19 upward, lifting it to allow passage for passing ships and preventing the pier 19 from interfering with the navigation of the ship.

[0037] The plurality of connectors 8 are respectively fixedly arranged between two adjacent lifting steel pipe piles 2. The plurality of connectors 8 can improve the stability between the lifting steel pipe piles 2.

[0038] Secondly, the operating platform 9 is fixedly connected to the lifting beam 3 and is located on the top of the lifting beam 3. The operating platform 9 is convenient for workers to carry out construction, as well as to inspect and operate the hoist 4.

[0039] When using the present invention, the four lifting mechanisms 1 are installed on both sides of the pier 19, the lifting steel pipe piles 2 and the lifting beam 3 serve as supports for the entire device, one end of the steel wire rope 7 is installed on the winch 4, and the other end is installed on the pier 19. The steel wire rope 7 is guided by the pulley group 6. When a passing ship needs to navigate, the winch 4 reels the steel wire rope 7, and the steel wire rope 7 drives the pier 19 to move upward, lifting the pier 19 for navigation of passing ships, thereby avoiding interference of the pier 19 with the navigation of ships.

[0040] Second, see Figure 5-10 The present invention also provides a trestle lifting construction method, comprising:

[0041] S100 trestle 19 construction;

[0042] The steps include:

[0043] Construction of S101 trestle 19 steel pipe pile 10;

[0044] The steel pipe piles 10 are made of Φ630×10mm spiral steel pipes and driven by a 75t crawler crane DZ-90 vibratory hammer. Measurement and positioning: GPS is used for measurement and layout, and Bailey beam 11 is used to make a positioning frame for positioning. A total station is used to monitor the plane position and verticality of the steel pipe, and the pile driver is commanded via an intercom to adjust the verticality of the steel pipe piles 10 and correct the plane deviation. The driven steel pipe piles 10 are promptly reviewed using a total station. If there is a large deviation, they are pulled out and re-driven. At the same time, the positions of the pre-driven steel pipe piles 10 are checked with the driven steel pipe piles 10 to ensure that the positioning of the steel pipe piles 10 is accurate. Guide frame production and installation: The guide frame of each pier is installed at the main beam node of the pipe pile to be driven. The Bailey beam 11 is erected and suspended 12m forward to reserve space for the guide frame. The guide frame is installed at the front end of the main beam. Steel pipe piles 10 are driven using a crawler crane and a vibratory hammer. The crawler crane is positioned on the deck of the completed steel trestle 19 and the piles are driven. After surveyors confirm that the pile position and verticality meet the required standards, the vibratory hammer is activated. During construction, both the designed pile length and penetration depth are controlled, with the pile base elevation being the primary control and the penetration depth being the primary verification. If the penetration depth meets the following criteria: a first penetration duration of at least 30 seconds with a penetration depth of less than 3 cm, a second penetration duration of at least 15 seconds with a penetration depth of less than 1.5 cm, and a third penetration duration of at least 15 seconds with a penetration depth of less than 1.2 cm, the pile can be vibrated. Each pile sinking cycle must be continuous and consistent, with no prolonged pauses to prevent soil disturbance around the pile from resuming, hindering further sinking. If the vibration duration is too short, the soil structure remains intact; if it is too long, the vibratory hammer components may be damaged. The duration of the vibration should be determined through testing based on the specific machinery and geology, and generally should not exceed 10 to 15 minutes. The vibratory hammer and the pile head must be clamped with hydraulic pliers without any gap or looseness, so as not to affect the sinking of the steel pipe pile 10 and damage the joints. During the vibration of the vibratory hammer, if the pile top is found to be locally deformed or damaged, it must be repaired in time. The surveying personnel will direct the precise positioning on site. During the installation of the steel pipe pile 10, the pile position and the verticality of the pile must be constantly checked, and the pile top elevation must be controlled. The joints and stiffening plates between the steel pipe piles 10 must be fully welded and meet the designed weld thickness requirements. The steel pipe pile 10 can only be installed after the on-site technicians have checked that the welding quality of the steel pipe pile 10 joints is qualified. If it is found that the steel pipe pile 10 has a tendency to tilt when sinking, take appropriate measures to adjust the verticality or pull it out and reinsert it. The subsequent pile connection construction is as follows.

[0045] Interface Cleaning: Before butt-jointing the steel pipe piles 10, remove any rust, scale, and oil within 30mm of the joint on both sides, revealing the steel's metallic luster. The segment length of the trestle 19 steel pipe piles 10 is determined based on the on-site pile length. Piles are joined using full butt welding. Verticality should be corrected before welding, and the butt gap between the piles should be controlled within 2-4mm. Welding: Bevel welding is used for butt-jointing, with single- and double-sided V-groove angles between 60-70°. Multi-layer welding is used, with staggered welds on each layer. After each layer is welded, remove slag and spatter to prevent defects such as slag inclusions and unfused materials. After bevel welding, four reinforcement plates (150×10×200mm) should be installed on the outside of the piles. Environmental Requirements: Welding is not permitted when wind speeds exceed 10m / s, temperatures are below 0°C, and it is raining or snowing, or when the piles are damp and quality assurance measures are unavailable. Weld quality control: The weld should be uniform and beautiful, without defects such as dents, pores, cracks, slag inclusions, etc. The weld size should be controlled according to the design requirements to ensure the corresponding strength and anti-corrosion measures are achieved. The weld quality should be checked frequently during the welding process, and any defects should be repaired in a timely manner. The weld quality must meet the design requirements, and non-destructive testing (ultrasonic testing, radiographic testing) or destructive testing should be performed on a random basis to ensure that the welding quality meets the design and specification requirements. Cooling requirements: After each joint is welded, it should be cooled for at least 30 minutes. The pile can only be hammered in when the weld temperature reaches room temperature.

[0046] S102 steel pipe pile 10 horizontal parallel construction;

[0047] The horizontal parallel connection of steel pipe piles 10 uses 20a channel steel. After each row of steel pipe piles 10 is sunk into place, the piles should be connected in time to increase the stability of the piles. The parallel connection installation is a whole piece of lifting, so the installation position must be accurate and the layout should be symmetrical in all directions.

[0048] Construction of the main beam 19 of S103 trestle;

[0049] After each row of piles is completed and inspected, the inter-pile connection system 12 and the pile top beam can be installed. First, the construction personnel stand on the mobile operating platform 9 and cut out the notch for the main beam according to the drawing, weld the reinforcing triangular bracket stiffening plate N1 and stiffening plate N2, and then hoist the main beam. The main beam A1 uses double-piece 2I56a I-beams. The two I-beams are welded at a local position on the ground, connected into one, and hoisted into place as a whole, and then the distribution beam 18 is installed. Before installing the main beam at the top of the pile, the pile top elevation should be accurately measured. If there is a difference with the design elevation, it should be adjusted. The pile top after treatment should be kept horizontal, the elevation should be consistent with the design value, and the pile top should not have external defects such as curling, tearing, and out-of-roundness. Each weld must be inspected and approved by the construction personnel before proceeding to the next step.

[0050] S104 installs trestle 19 Bailey beam 11;

[0051] The lifting span utilizes reinforced "321" Bailey beams 11, consisting of four groups of 12 pieces, each connected by a 45-type planter. The Bailey beam 11 to be installed is lifted and placed behind the already installed Bailey beams 11, aligned with them. Manual labor and a crane are used to lift the front end of the Bailey beam 11. After aligning the lower chord pin holes, the pin is inserted. The rear end of the Bailey beam 11 is then lifted, the upper chord pin inserted, and the safety latch installed. The Bailey beams 11 are assembled in groups, one group at a time (four horizontal rows). Each group is 12 meters long and connected by planters. After assembly, the beams are transported to the construction site as a whole. Bailey beam 11 erection: Four rows of Bailey beams 11 in a single span are erected as a group. The specific process is as follows: measurement and layout are carried out on the top crossbeam of the lower structure to determine the exact position of the Bailey frame; the assembled set of Bailey main trusses are loaded onto a truck and transported to the rear of the crawler crane; the crawler crane first installs one set of Bailey beams 11, welds the limit clamps after they are accurately positioned, and then installs another set of Bailey beams 11, and so on to complete the installation of the Bailey beams 11 of the entire span.

[0052] S105 trestle 19 bridge deck system construction;

[0053] After the main girder installation for the trestle 19 hoist span passes inspection, the bridge deck construction can proceed immediately. The bridge deck is fabricated on-site using a transverse beam + longitudinal beam + deck system. The transverse distribution beam 18 utilizes I22a@750 I-beams, the longitudinal distribution beam 18 utilizes I12.6a@250 I-beams, and the deck panel utilizes 8mm thick checkered steel plates. These three components are welded together in the back-end, and the individual bridge decks are hoisted together on-site. The distribution beam 18 is secured to the Bailey beam 11 using limit clamps to prevent slippage between the deck and Bailey beam 11.

[0054] Installation of guardrail 14 on S106 trestle 19

[0055] Guardrail 14 is 1.2m high and uses I10@1500mm I-steel as columns, 3 Steel pipes are used as crossbar handrails. Holes are opened in the web of I10 I-beams and the bottom is welded to the bridge deck with a spacing of 1.5m. φ48mm steel pipes are inserted into the openings. A 20cm high skirting board is set at the bottom of the railing and welded to the trestle panel 19 13 to form a whole. After the installation of the guardrail 14 and skirting board is completed, they are painted with red and white warning paint.

[0056] S200 is equipped with four lifting mechanisms 1;

[0057] Four φ630×10mm steel pipe piles 10 were driven 2.5m outside the common axis of the steel pipe piles 10 for the navigation pier 19, on either side. The top elevation of the steel pipe piles 10 was planned to be 1753.0m, for a total of 16 lifting steel pipe piles 2. Each pair of steel pipes was welded together with 20a channel steel to ensure overall stability. A double-jointed I40a I-beam was installed atop the lifting steel pipe piles 2 on the same side, serving as the crossbeam for the lifting bridge. Calculations indicate that the lifting weight of the main span deck, Bailey longitudinal beams, I-beam distribution beams 18, and crossarms is approximately 82.5t. Based on the lifting point locations of the pier 19, a 10t synchronous winch 4 (operated by a pulley block 6) was installed at each point on the I40a double-jointed I-beam, for a total of four winches to raise and lower the pier 19. Four lifting points are required to maintain balanced lifting during the lifting of the pier 19. The lifting speed of the winch 4 is 0.5m / min. The maximum lifting height of the navigation channel trestle 19 is 8m. In order to meet the needs of personnel to go up and down to inspect the winch 4, a permanent platform is set up on the side of the standard span, and a trestle 19 platform 15 is set up at the junction of the main trestle 19 and the lifting span. The platform size is 1.5*1.6 meters. The trestle 19 guardrails 14 are used for protection on all sides. The 1.5-meter cantilever is extended with a transverse distribution beam 18, and the same patterned steel plate as the trestle 19 is laid on it. A cage ladder 16 is set on the steel pipe pile 10 where the trestle 19 platform 15 is left. Each tripod of the cage ladder 16 is welded with 20 threaded steel bars. The spacing between the tripods is 30cm, and the minimum spacing between the tripods at a distance of 630 steel pipe piles 10 is 16cm. The length of the tripod is 25cm, and the handrails between the tripods are welded with 20 round steel bars. And a guard ring is set up 2 meters above the platform 15 of the trestle 19. The overall diameter of the guard ring is 70 cm, and three 16-threaded steel bars are arranged vertically at equal intervals along the outside of the guard ring. The spacing between the guard rings is 80 cm. In order to ensure stable lifting and ensure that the trestle 19 as a whole does not lose stability and deform, 8-channel steel door-type limiters are used for welding limiters between the lower chord of the Bailey beam 11 and the three-piece 56a I-beam. Ensure that each group of Bailey beams 11 is completely fixed on the upper side of the load-bearing beam. After the main construction of the trestle 19 is completed, anti-collision piers 17 are set at the four corners of the lifting trestle 19, and three are set 2.5m outside the transverse axis of each lifting steel pipe. The steel pipe columns are arranged into an equilateral triangle with a spacing of 2.358m. Cross-linking steel pipes securely connects the three steel pipe piles 10 into a single unit, enhancing collision resistance. Warning signs must be displayed on the trestle 19 guardrails 14, with red light strips installed on the outside. Solar-powered flashing warning lights will be installed every 10 meters and at the ends. Solar-powered flashing lights will be installed at the tops of the crash barriers 17, and reflective film will be applied to the pile bodies.

[0058] S300: When there is a need for ship navigation, the lifting mechanism 1 lifts the pier 19;

[0059] When a passing ship needs to pass through, the winch 4 reels the wire rope 7, and the wire rope 7 drives the pier 19 to move upward, lifting the pier 19 to allow passing ships to pass through, thereby avoiding interference with the navigation of ships caused by the pier 19. The synchronous control and early warning system for the lifting of the pier 19 achieves the technology of balanced adjustment of the lifting of the pier 19 by early warning of excessive axial force of the wire rope 7, real-time monitoring of the lifting displacement of the pier 19, and a combination of single-point lifting and multi-point lifting control, thereby avoiding asynchronous lifting during the synchronous lifting of the four lifting points. The load of the crane is detected by a resistive strain gauge weighing sensor. When the crane lifts an object, the sensor is compressed and generates a voltage signal proportional to the load. When the force on the wire rope 7 is greater than the design value, the power supply of the crane lifting control circuit is cut off, and an audible and visual alarm is issued. A wire displacement sensor is installed at the bottom of each of the four corner points of the pier 19, and the lifting height of each corner point is measured in real time by the displacement sensor. A cable-type displacement sensor converts the lifting motion of trestle 19 into a measurable electrical signal. Installed on the bottom crossbeam of a standard-span trestle 19, the cable end is fixed to the hoistable trestle 19. As trestle 19 is raised or lowered, the cable extends and contracts, and the instrument outputs an electrical signal proportional to the distance the cable moves. Measuring this output signal reveals the displacement or velocity of trestle 19. Vertical lifting height control is achieved by installing a limiter device on the wire rope 7 of pulley block 6. If human error causes the lifting height to exceed the limiter, the power is automatically cut off, halting the ascent. A winch 4 is installed on the top of the gantry of the trestle 19, and the wire rope 7 pulley block 6 provides power for the lifting of the trestle 19. The start and stop combination of the four winches 4 is controlled by the on-site operating system, and the operating system realizes the functions of rising and falling. The external operating interface combination switch control includes the "simultaneous start", "single start" and "stop" functions of multiple lifting points, ensuring that when the trestle 19 is in an unbalanced state, fine adjustments can be made individually to ensure that the entire trestle 19 is in a balanced and stable lifting state. The control system needs to meet the lifting of a single lifting point or multiple lifting points at the same time. After the lifting hole steel trestle 19 is lifted into place, in order to prevent the trestle 19 from swinging under the action of lateral wind loads, cables are set at the four corner points of the lifting hole trestle 19. The two cables at each end are diagonally pulled and anchored to the top beam of the brake pier pile of the lifting hole trestle 19 to prevent the lateral swing of the lifting hole trestle 19.

[0060] The present invention provides a method for lifting a pier 19. When a passing ship needs to pass through, the winch 4 reels the wire rope 7, and the wire rope 7 drives the pier 19 to move upward, thereby lifting the pier 19 to allow passing ships to pass through, thereby avoiding interference of the pier 19 with the navigation of the ship.

[0061] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A trestle lifting construction device, characterized in that: Includes four lifting mechanisms; The lifting mechanism includes four lifting steel pipe piles, two lifting beams, a winch, a pulley block fixed beam, a pulley block and a steel rope; The two lifting beams are respectively fixedly arranged on the top of the two lifting steel pipe piles on the same side; the winch is fixedly connected to the lifting beam and is located on the top of the lifting beam; the pulley group fixed beam is fixedly arranged on the lifting beam; the pulley group is arranged on the pulley group fixed beam; the wire rope is arranged on the winch.

2. The trestle lifting construction device according to claim 1, characterized in that: The lifting mechanism further includes a plurality of connecting members; the plurality of connecting members are respectively fixedly arranged between two adjacent lifting steel pipe piles.

3. The trestle lifting construction device according to claim 2, characterized in that: The lifting mechanism further includes an operating platform; the operating platform is fixedly connected to the lifting beam and is located on the top of the lifting beam.

4. A trestle lifting construction method, applied to the trestle lifting construction device according to any one of claims 1 to 3, characterized in that: include: trestle construction; Install four lifting mechanisms; When there is a need for ship navigation, the lifting mechanism lifts the pier.

5. The trestle lifting construction method according to claim 4, characterized in that: The specific steps of trestle construction include: Pier steel pipe pile construction; Horizontal parallel connection construction of steel pipe piles; Construction of the main beam of the trestle; installation of trestle Bailey beams; Construction of trestle bridge deck system; Installation of pier guardrails.

Images