Construction method for balancing stress of hollow slab beam support

Abstract

According to the construction method for balancing the stress of the hollow slab beam support, an automatic control system, a universal self-locking jack, a hydraulic pump station matched with the universal self-locking jack and an intelligent pressure meter are adopted, and the intelligent pressure meter is plugged into a support padstone below a balance hollow slab beam; a universal self-locking jack is placed between the top face of a cover beam check block and the bottom face of a hollow slab boundary beam flange, the universal self-locking jack is connected with a matched hydraulic pump station through a hydraulic hose, and an intelligent control terminal in an automatic control system is in wireless connection with the hydraulic pump station and an intelligent pressure meter. Each subsystem comprising a universal self-locking jack, a hydraulic pump station and an intelligent pressure gauge is automatically controlled through an intelligent terminal, and the intelligent terminal is used for releasing pressure of an anti-collision wall side support before construction of a wet joint of a balanced hollow slab beam is completed and enabling the anti-collision wall side support to be pressed again after construction of the wet joint is completed, so that stress of a support below the hollow slab beam is balanced, and the construction efficiency of the hollow slab beam is improved. The construction quality of a support system is guaranteed, the support and wet joints are prevented from being damaged, and the service life of a bridge is prolonged.

Description

Technical Field

[0001] The invention relates to a construction method suitable for a hollow slab beam with an integrally installed anti-collision wall, in particular to a construction method for balancing the stress of a hollow slab beam support. Background Art

[0002] One of the important freight transportation routes has a superstructure that is damaged due to aging and long-term overload. The difficulty of this project is that the beam replacement construction needs to be completed quickly within a limited time. In order to save time on site construction, the technology of integrated construction of hollow slab side beams with anti-collision walls needs to be adopted. However, the center of gravity of the composite component is close to the anti-collision wall. If it is not treated, the uneven force of the support for a long time will lead to the occurrence of support and wet joint diseases. Therefore, how to balance the force of the inner and outer supports under the hollow slab beam to prevent the occurrence of support and wet joint diseases has become an urgent problem to be solved. Summary of the invention

[0003] The present invention aims to solve the problem that during the integrated construction of a hollow slab beam with a crash wall, the center of gravity of the combined component is close to the crash wall side, and long-term uneven force will lead to the occurrence of support and wet joint diseases, and proposes a construction method for balancing the force of the hollow slab beam support.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a construction method for balancing the stress of hollow slab beam supports, adopting a set of automated control systems, universal self-locking jacks and their supporting hydraulic pump stations, and intelligent pressure gauges, inserting the intelligent pressure gauge on the support pad stone under the balanced hollow slab beam, placing the universal self-locking jacks between the top surface of the cap beam block and the bottom surface of the hollow slab side beam flange, the universal self-locking jacks are connected to the supporting hydraulic pump station through hydraulic hoses, the intelligent control terminal in the automated control system is wirelessly connected to the hydraulic pump station and the intelligent pressure gauge, and the subsystems including the universal self-locking jacks, the hydraulic pump station, and the intelligent pressure gauge are automatically controlled by the intelligent terminal to release the pressure of the side supports of the crash wall before the wet joints of the balanced hollow slab beams are completed, and the side supports of the crash wall are compressed again after the wet joints are completed, so as to balance the stress of the supports below the hollow slab beam, ensure the construction quality of the support system, prevent the supports and wet joints from being damaged, and extend the service life of the bridge.

[0005] Furthermore, the automation control system includes an intelligent control terminal and two subsystems. The intelligent control terminal is used to receive, calculate, analyze, and display various data uploaded by the subsystem, and send instructions to the subsystem according to preset parameters. The subsystem receives instructions from the intelligent control terminal and feeds back data to the intelligent control terminal in real time.

[0006] Furthermore, the universal self-locking jack includes a fixed base, a self-locking ring, and a hemispherical universal joint. The fixed base fixes the jack on the cap beam block. After reaching the design value, the jack is locked with the self-locking ring. The hemispherical universal energy-saving adaptive plate beam flange bottom surface.

[0007] Furthermore, the hydraulic pump station is connected to the universal self-locking jack through a hydraulic hose. The hydraulic pump station receives instructions from the intelligent control terminal and feeds back data of the universal self-locking jack to the intelligent control terminal in real time.

[0008] Furthermore, the intelligent pressure gauge includes upper and lower covers, a diaphragm pressure gauge, a spring, and a wireless transceiver. The diaphragm pressure gauge is subjected to the pressure of its spring and converts the pressure into an electrical signal which is transmitted to the wireless transceiver via a wired manner. The wireless transceiver has the functions of calculation, display, and wireless transmission and reception. It calculates the electrical signal transmitted by the diaphragm pressure gauge, converts it into a physical value for display, and transmits the data to the intelligent control terminal.

[0009] Furthermore, the specific steps of the method are:

[0010] Step 1: Construction preparation stage

[0011] ① Before formal construction, the center of gravity of the plate beam is calculated and the force test of the balanced plate beam support is carried out to determine the specifications and models of the automatic control system, universal self-locking jack and its supporting hydraulic pump station, and intelligent pressure gauge;

[0012] ② Check the status of the universal self-locking jack, intelligent pressure gauge, and hydraulic pump station, and calibrate them, and check whether the connection between the intelligent control terminal and each subsystem is normal;

[0013] Step 2: Component hoisting stage

[0014] ④Clean the top surface of the bearing pad stone and place the bearing in place;

[0015] ② Apply adhesive to the inner side of the cap beam block and install the limit shockproof rubber block;

[0016] ③Integrated installation of balanced hollow slab side beams and anti-collision walls;

[0017] Step 3: Equipment installation phase

[0018] ① Clean the top surface of the span cap beam and the bottom surface of the flange of the hollow slab side beam to ensure the surface is flat;

[0019] ②Measure the center position of the universal self-locking jack and mark the positions of the four fixing holes on the cap beam block;

[0020] ③Drill the fixing holes, which must meet the depth and diameter requirements;

[0021] ④ Use a steel brush or hair dryer to clean the drill hole to ensure there is no debris or dust in the hole;

[0022] ⑤Put chemical agents into the hole and screw in chemical expansion bolts to ensure the verticality and screw-in depth of the bolts;

[0023] ⑥ Test the pull-out resistance of the bolts. If they meet the requirements, put them into the universal self-locking jack and tighten the matching nuts;

[0024] ⑦ Connect the jack and the pump station through hydraulic hose;

[0025] ⑧Insert the intelligent pressure gauge on the support pad stone;

[0026] Step 4: Balanced support force stage

[0027] ① The intelligent control terminal is wirelessly connected to the hydraulic pump station and the intelligent pressure gauge;

[0028] ⑤Reset the intelligent pressure gauge reading and reset the parameters;

[0029] ③ Pressurize the universal self-locking jacks on both sides of the same span, and place pad steel when it is about to contact the bottom surface of the hollow slab beam flange 5 to increase the contact area with the flange to prevent cracking;

[0030] ⑥ Apply reaction force to the flange of the hollow slab side beam and observe the reading of the intelligent control terminal. When the set parameter value is reached, the intelligent control terminal automatically sends a command to the hydraulic pump station to stop pressurizing, and then lowers the self-locking ring of the universal self-locking jack to lock the jack. At this time, the jack and the inner support are subjected to force at four points;

[0031] ⑤ Remove the intelligent pressure gauge, hydraulic hose, and hydraulic pump station for the next span construction. The universal self-locking jack needs to be removed after the wet joint construction is completed;

[0032] ⑥ The wet joint steel bars of the side beams and the wet joint steel bars of the middle beams are welded to form a temporary whole;

[0033] ⑦ The bridge wet joints are installed with formwork, concrete is poured and maintained, and the wet joints are completed;

[0034] Step 5: Construction completion stage

[0035] ② Raise the self-locking ring to unlock the universal self-locking jack. At this time, the outer support and the inner support are subjected to force at four points;

[0036] ② Release the pressure and retract the telescopic rod;

[0037] ③ Unscrew the nut, take out the universal self-locking jack, and remove the screw;

[0038] ⑤ Backfill the hole with high-strength mortar and remove the universal self-locking jack.

[0039] The beneficial results of the present invention are:

[0040] The main function of the present invention is to balance the force on the supports below the hollow slab beam, improve the force conditions of the supports, and ensure the construction quality of the support system. Prevent the supports and wet joints from being damaged and extend the service life of the bridge. The present invention automatically controls each subsystem through an intelligent control terminal to release the pressure on the side supports of the crash barrier before the wet joints are constructed. After the wet joints are constructed, the side supports of the crash barrier are compressed again to achieve the purpose of balancing the force on the inner and outer supports below the hollow slab side beams. At the same time, the present invention is easy to operate and control, and can be applied to bridge projects with hollow slab beams as the upper structure, and has a certain degree of popularity and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a control system diagram of the present invention;

[0042] Figure 2 It is a schematic diagram of the bearing force at each construction stage;

[0043] Figure 3 It is a diagram of the components of a universal self-locking jack;

[0044] Figure 4 It is a diagram of the components of a smart pressure gauge;

[0045] Figure 5 It is a cross-sectional view of the bridge;

[0046] Figure 6 It is a floor plan;

[0047] Explanation of the reference numerals in the accompanying drawings: steel plate base 11; bolt 12; nut 13; load gauge 14; jack cylinder 15; telescopic rod 16; self-locking ring 17; hemispherical universal joint 18; membrane pressure gauge 21; spring 22; wireless transceiver 23; upper cover plate 24; lower cover plate 25; universal self-locking jack 3141; intelligent pressure gauges 32, 42; supports 33, 34, 43, 44; support pads 35, 36, 45, 46; limiting shockproof rubber block 51; cap beam stopper 52; hollow slab beam flange 53; pad steel plate 54; side beam wet joint steel bars 55; middle beam wet joint steel bars 56; wet joint 57. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

[0049] like Figures 1 to 6As shown, the present invention aims to solve the problem that during the integrated construction of hollow slab beams with crash walls, the center of gravity of the combined components is close to the crash wall side, and long-term uneven force will lead to the occurrence of support and wet joint diseases, and proposes a construction method for balancing the force of hollow slab beam supports.

[0050] The specific steps of the present invention are:

[0051] Step 1: Construction preparation stage

[0052] ① Before formal construction, it is necessary to calculate the center of gravity of the plate beam and test the force of the balanced plate beam support to determine the specifications and models of the equipment and instruments;

[0053] ② Check the status of the jack, pressure gauge, and hydraulic pump station, and equip the required kits for each instrument. Calibrate the readings of each instrument to confirm that it is working properly. Check whether the connection between the intelligent control terminal and each instrument is normal;

[0054] ③ Provide sufficient instructions to the construction team and require them to clearly understand the construction process and equipment operating specifications.

[0055] Step 2: Component hoisting stage

[0056] ⑦ Clean the top surfaces of the support stones 35, 36, 45, 46, and put the supports 33, 34, 43, 44 in place;

[0057] ② Apply adhesive to the inner side of the cap beam stopper and install the limit shockproof rubber block 51;

[0058] ③Integrated installation of hollow slab side beams and anti-collision walls;

[0059] ④After component lifting is completed, personnel evacuate.

[0060] Step 3: Equipment installation phase

[0061] ① Clean the top surface of the working span cap beam block 52 and the bottom surface of the hollow slab side beam flange 53 to ensure the surface is flat;

[0062] ② Measure the center position of the jack and mark the positions of the four fixing holes on the cap beam block 52;

[0063] ③Drill the fixing holes, which must meet the depth and diameter requirements;

[0064] ④ Use a steel brush or hair dryer to clean the drill hole to ensure there is no debris or dust in the hole;

[0065] ⑤Put chemical agents into the hole and screw in chemical expansion bolts 12, ensuring the verticality and screwing depth of the bolts;

[0066] ⑥ Test the pull-out resistance of the bolts. When the bolts meet the requirements, put them into the jack and tighten the matching nuts 13;

[0067] ⑦ Connect the jack and the pump station through hydraulic hose;

[0068] ⑧ Insert the intelligent pressure gauges 32 and 42 on the support pad stone;

[0069] Step 4: Balanced support force stage

[0070] ② The intelligent control terminal is wirelessly connected to the hydraulic pump station and the intelligent pressure gauge;

[0071] ⑧ Reset the readings of the intelligent pressure gauges 32 and 42 and reset the parameters;

[0072] ③ Pressurize the universal self-locking jacks on both sides of the same span, and place a cushion steel plate 54 when it is about to contact the bottom surface of the hollow slab beam flange 53 to increase the contact area with the flange to prevent cracking;

[0073] ④ Apply reaction force to the flange 53 of the hollow slab side beam, observe the reading of the intelligent control terminal, and when the set parameter value is reached, the intelligent control terminal automatically sends a command to the hydraulic pump station to stop pressurizing, and then lowers the self-locking ring 17 of the universal self-locking jack to lock the jack. At this time, the jack and the inner side supports 34 and 44 are subjected to force at four points;

[0074] ⑤ Remove the intelligent pressure gauges 32, 42, hydraulic hoses, hydraulic pump stations and other equipment for the next span construction. The jacks need to be removed after the wet joint construction is completed.

[0075] ⑥ The side beam wet joint steel bars 55 and the middle beam wet joint steel bars 56 are welded to form a temporary whole;

[0076] ⑦ The bridge wet joint 57 is installed with formwork, concrete is poured and maintained, and the construction of the wet joint 57 is completed.

[0077] Step 5: Construction end stage

[0078] ③ Raise the self-locking ring 17 to unlock the jack. At this time, the outer supports 33, 43 and the inner supports 34, 44 are subjected to force at four points;

[0079] ② Release the pressure and retract the telescopic rod 16;

[0080] ③ Unscrew the nut 13, remove the jack, and disassemble the screw 12;

[0081] ⑥ Backfill the hole with high-strength mortar and remove the jack.

[0082] The construction method for balancing the force of the hollow slab beam support can balance the force of the support below the hollow slab beam: the intelligent terminal automatically controls each subsystem, releases the pressure of the side support of the crash wall before the wet joint is completed, and re-presses the side support of the crash wall after the wet joint is completed, so as to balance the force of the support below the hollow slab beam and ensure the construction quality of the support system. It prevents the support and wet joint from being damaged and prolongs the service life of the bridge.

[0083] like Figure 2 As shown in the figure, an automatic control system is used, including an intelligent control terminal and two subsystems. The intelligent control terminal mainly receives, calculates, analyzes and displays various data uploaded by the subsystem, and sends instructions to the subsystem according to preset parameters. The subsystem includes a universal self-locking jack and its supporting hydraulic pump station, and an intelligent pressure gauge. The subsystem receives instructions from the intelligent control terminal and feeds back data to the intelligent control terminal in real time.

[0084] A universal self-locking jack and its matching hydraulic pump station are used: Figure 3 As shown in the figure, the universal self-locking jack includes a fixed base, a self-locking ring, and a hemispherical universal joint. The fixed base can fix the jack on the cap beam block. After reaching the design value, the self-locking ring can be used to lock the jack. The hemispherical universal joint can adapt to the bottom surface of the plate beam flange. The hydraulic pump station is connected to the universal self-locking jack through a hydraulic hose. The hydraulic pump station receives instructions from the intelligent control terminal and feeds back the data of the universal self-locking jack to the intelligent control terminal in real time.

[0085] like Figure 4 As shown, an intelligent pressure gauge is used: the main components are upper and lower covers, a film pressure gauge, a spring, and a wireless transceiver. The film pressure gauge is subjected to the pressure of its spring, and the pressure is converted into an electrical signal and transmitted to the wireless transceiver through a wired manner. The wireless transceiver mainly has the functions of calculation, display, and wireless transmission and reception. It calculates the electrical signal transmitted by the film pressure gauge, converts it into a physical value display, and transmits the data to the intelligent control terminal.

Claims

1. A construction method for balancing the stress of hollow slab beam supports, characterized in that: An automated control system, a universal self-locking jack and its supporting hydraulic pump station and an intelligent pressure gauge are used. The intelligent pressure gauge is inserted into the support pad stone under the balanced hollow slab beam, and a universal self-locking jack is placed between the top surface of the cap beam block and the bottom surface of the hollow slab side beam flange. The universal self-locking jack is connected to the supporting hydraulic pump station through a hydraulic hose. The intelligent control terminal in the automated control system is wirelessly connected to the hydraulic pump station and the intelligent pressure gauge. The intelligent terminal automatically controls the subsystems including the universal self-locking jack, the hydraulic pump station and the intelligent pressure gauge to release the pressure of the side supports of the crash wall before the wet joints of the balanced hollow slab beam are constructed, and the side supports of the crash wall are compressed again after the wet joints are constructed, so as to balance the force on the supports under the hollow slab beam, ensure the construction quality of the support system, prevent the supports and wet joints from being damaged, and extend the service life of the bridge.

2. The construction method for balancing the stress of hollow slab beam supports according to claim 1 is characterized in that: The automation control system includes an intelligent control terminal and two subsystems. The intelligent control terminal is used to receive, calculate, analyze and display various data uploaded by the subsystem, and send instructions to the subsystem according to preset parameters. The subsystem receives instructions from the intelligent control terminal and feeds back data to the intelligent control terminal in real time.

3. The construction method for balancing the stress of hollow slab beam supports according to claim 1 is characterized in that: The universal self-locking jack includes a fixed base, a self-locking ring, and a hemispherical universal joint. The fixed base fixes the jack on the cap beam block. After reaching the design value, the jack is locked with a self-locking ring. The hemispherical universal energy-saving self-adaptive plate beam flange bottom surface.

4. The construction method for balancing the stress of hollow slab beam supports according to claim 1 is characterized in that: The hydraulic pump station is connected to the universal self-locking jack through a hydraulic hose. The hydraulic pump station receives instructions from the intelligent control terminal and feeds back the data of the universal self-locking jack to the intelligent control terminal in real time.

5. The construction method for balancing the stress of hollow slab beam supports according to claim 1 is characterized in that: The intelligent pressure gauge includes upper and lower covers, a film pressure gauge, a spring, and a wireless transceiver. The film pressure gauge is subjected to the pressure of its spring and converts the pressure into an electrical signal and transmits it to the wireless transceiver through a wired manner. The wireless transceiver has the functions of calculation, display, and wireless transmission and reception. It calculates the electrical signal transmitted by the film pressure gauge, converts it into a physical value for display, and transmits the data to the intelligent control terminal.

6. The construction method for balancing the stress of hollow slab beam supports according to claim 1 is characterized in that: The specific steps of this method are: Step 1: Construction preparation stage ① Before formal construction, the center of gravity of the plate beam is calculated and the force test of the balanced plate beam support is carried out to determine the specifications and models of the automatic control system, universal self-locking jack and its supporting hydraulic pump station, and intelligent pressure gauge; ② Check the status of the universal self-locking jack, intelligent pressure gauge, and hydraulic pump station, and calibrate them, and check whether the connection between the intelligent control terminal and each subsystem is normal; Step 2: Component hoisting stage ①Clean the top surface of the bearing pad stone and place the bearing in place; ② Apply adhesive to the inner side of the cap beam block and install the limit shockproof rubber block; ③Integrated installation of balanced hollow slab side beams and anti-collision walls; Step 3: Equipment installation phase ① Clean the top surface of the span cap beam and the bottom surface of the flange of the hollow slab side beam to ensure the surface is flat; ②Measure the center position of the universal self-locking jack and mark the positions of the four fixing holes on the cap beam block; ③Drill the fixing holes, which must meet the depth and diameter requirements; ④ Use a steel brush or hair dryer to clean the drill hole to ensure there is no debris or dust in the hole; ⑤Put chemical agents into the hole and screw in chemical expansion bolts to ensure the verticality and screw-in depth of the bolts; ⑥ Test the pull-out resistance of the bolts. If they meet the requirements, put them into the universal self-locking jack and tighten the matching nuts; ⑦ Connect the jack and the pump station through hydraulic hose; ⑧Insert the intelligent pressure gauge on the support pad stone; Step 4: Balanced support force stage ① The intelligent control terminal is wirelessly connected to the hydraulic pump station and the intelligent pressure gauge; ②Reset the intelligent pressure gauge reading and reset the parameters; ③ Pressurize the universal self-locking jacks on both sides of the same span, and place pad steel when it is about to contact the bottom surface of the hollow slab beam flange 5 to increase the contact area with the flange to prevent cracking; ③ Apply reaction force to the flange of the hollow slab edge beam and observe the reading of the intelligent control terminal. When the set parameter value is reached, the intelligent control terminal automatically sends a command to the hydraulic pump station to stop pressurizing, and then lowers the self-locking ring of the universal self-locking jack to lock the jack. At this time, the jack and the inner support are subjected to force at four points; ⑤ Remove the intelligent pressure gauge, hydraulic hose, and hydraulic pump station for the next span construction. The universal self-locking jack needs to be removed after the wet joint construction is completed; ⑥ The wet joint steel bars of the side beams and the wet joint steel bars of the middle beams are welded to form a temporary whole; ⑦ The bridge wet joints are installed with formwork, concrete is poured and maintained, and the wet joints are completed; Step 5: Construction end stage ① Raise the self-locking ring to unlock the universal self-locking jack. At this time, the outer support and the inner support are subjected to force at four points; ② Release the pressure and retract the telescopic rod; ③ Unscrew the nut, take out the universal self-locking jack, and remove the screw; ④ Backfill the hole with high-strength mortar and remove the universal self-locking jack.

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