CN118148032A - Bridge in-situ cast-in-situ construction method - Google Patents
Bridge in-situ cast-in-situ construction method Download PDFInfo
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- CN118148032A CN118148032A CN202410456654.9A CN202410456654A CN118148032A CN 118148032 A CN118148032 A CN 118148032A CN 202410456654 A CN202410456654 A CN 202410456654A CN 118148032 A CN118148032 A CN 118148032A
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- 238000010276 construction Methods 0.000 title claims abstract description 90
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 49
- 239000004567 concrete Substances 0.000 claims abstract description 101
- 238000000034 method Methods 0.000 claims abstract description 32
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 238000012423 maintenance Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 16
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 11
- 230000007306 turnover Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 5
- 230000003020 moisturizing effect Effects 0.000 claims description 5
- 239000011384 asphalt concrete Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 9
- 238000004904 shortening Methods 0.000 abstract description 6
- 238000003908 quality control method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The application relates to a bridge in-situ cast-in-situ construction method, which relates to the field of bridge cast-in-situ construction technology and comprises the following construction steps: s1, foundation construction; s2, installing a template; s3, binding reinforcing steel bars; s4, pouring concrete; s5, maintaining; s6, removing the die; s7, paving the bridge deck. The application is beneficial to improving the construction quality and stability of the bridge by controlling the details and quality control in the construction process, has certain practicability and operability, and is beneficial to shortening the construction period of the bridge and reducing the construction cost and simultaneously ensuring the structural performance of the bridge by adopting a special form removing device.
Description
Technical Field
The application relates to the field of bridge cast-in-situ construction technology, in particular to a bridge in-situ cast-in-situ construction method.
Background
In bridge construction, the selection of the construction method directly affects the structural performance, construction period and cost of the bridge. The traditional bridge construction method mainly comprises two steps of prefabrication installation and cast-in-place. The prefabricated installation method needs to produce each part of the bridge in a factory and then install the bridge on the construction site, and has the advantages of high construction speed, good structural performance and the like, but also has the defects of high cost, long construction period and the like. The in-situ casting method is to cast concrete on the construction site of the bridge, and has the advantages of short construction period, low cost and the like, but also has the defects of relatively poor structural performance and the like.
In order to overcome the defects of the two methods, the bridge in-situ cast-in-situ construction method is generated. The method has the advantages of short construction period, low cost and the like, and can ensure the structural performance of the bridge.
Disclosure of Invention
The application provides a bridge in-situ cast-in-situ construction method, which aims to shorten the construction period of a bridge, reduce the construction cost and ensure the structural performance of the bridge.
The in-situ cast-in-situ construction method of the bridge provided by the application adopts the following technical scheme:
The in-situ cast-in-situ bridge construction method comprises the following construction steps:
S1, foundation construction;
s2, installing a template;
s21, designing a template: according to the structural shape of the bridge, a proper template is designed, so that the shape and the size of the concrete structure are ensured to meet the design requirements;
s22, installing a template: installing the template on a foundation or a finished concrete structure, and ensuring the position and stability of the template;
S23, adjusting a template: adjusting the template to enable the template to meet the shape and the size of the design requirement;
s24, fixing a template: fixing the form on the foundation or the finished concrete structure by using bolts, nuts, supports and the like to prevent the form from moving or deforming;
S3, binding reinforcing steel bars;
S31, preparing a reinforcing steel bar: preparing required reinforced bar materials according to the requirements of a design drawing;
S32, binding reinforcing steel bars: binding and fixing the steel bars in the template according to the requirements of a design drawing, and ensuring the correct positions and the correct number of the steel bars;
s33, connecting reinforcing steel bars: the steel bars are connected according to the need, and welding, mechanical connection and other methods are usually used;
s34, checking the steel bars: after the binding of the steel bars is completed, checking is carried out to ensure that the quality and the position of the steel bars meet the design requirements;
S4, pouring concrete;
S41, preparing concrete: according to the design requirement, preparing a proper concrete mixing ratio, and stirring;
S42, transporting concrete: transporting the concrete to a construction site using a concrete mixer truck or pumping equipment;
S43, pouring concrete: pouring concrete into the template to ensure uniformity and compactness of the concrete;
s44, vibrating concrete: vibrating the concrete by using a vibrator to remove bubbles in the concrete and ensure the compactness of the concrete;
S45, trowelling the surface: after the concrete pouring is finished, trowelling the concrete surface by using a trowelling tool to make the concrete surface flat and smooth;
S5, maintenance: after the concrete pouring is completed, covering the pouring body with moisturizing cloth, wherein the curing time is 7-28 days;
s6, removing the die;
S61, removing the template: removing templates on two sides of the bridge by adopting a template removing device;
S62, cleaning a template: cleaning and maintaining the removed template for the next use;
s7, paving the bridge deck.
By adopting the technical scheme, the bridge in-situ cast-in-situ construction method has the following advantages and beneficial effects: the method provides detailed construction steps including foundation construction, template installation, steel bar binding, concrete pouring, maintenance, form removal and the like, so that the construction process is clearer, and the operation of constructors is facilitated. It is emphasized that designing a suitable form according to the structural shape of the bridge and ensuring the position and stability of the form helps to ensure that the shape and dimensions of the concrete structure meet the design requirements. The method has the advantages that binding and fixing of the steel bars are carried out according to the requirements of the design drawing, and connection is carried out according to the requirements, so that the strength and the stability of the concrete structure can be improved. The concrete mixing, transporting, pouring and vibrating processes are described in detail, emphasizing the uniformity and compactness of the concrete, which helps to ensure the quality of the concrete structure. The method mentions that the maintenance is carried out after the concrete pouring is completed, the moisturizing cloth is covered and the maintenance is carried out for a certain time, which is helpful for ensuring the strength and the stability of the concrete. Meanwhile, the form removal device is adopted to remove the form, so that the construction efficiency is improved and the damage of the form is reduced.
The scheme provides a comprehensive and detailed bridge in-situ cast-in-situ construction process, focuses on details and quality control in the construction process, is beneficial to improving the construction quality and stability of the bridge, has certain practicability and operability, and is beneficial to shortening the construction period of the bridge and reducing the construction cost while guaranteeing the structural performance of the bridge.
Optionally, the S1 foundation construction includes the following construction steps:
s11, determining a basic position: determining the position and the size of a bridge foundation according to the design drawing;
S12, excavating a foundation: excavating a foundation by using equipment such as an excavator and the like, so as to ensure the bottom of the foundation to be flat;
S13, paving a cushion layer: paving a layer of cushion layer at the bottom of the foundation, and usually using materials such as broken stone or sand and the like to improve the bearing capacity of the foundation;
S14, binding reinforcing steel bars: binding reinforcing steel bars in the foundation according to design requirements, and ensuring correct positions and number of the reinforcing steel bars;
s15, pouring concrete: after the binding of the steel bars is completed, pouring the concrete;
S16, maintenance: after the concrete pouring is finished, maintenance work is carried out, the surface of the concrete is kept moist during maintenance, and drying and cracking are avoided.
By adopting the technical scheme, the foundation construction method provides concrete steps of foundation construction, including determining the position of the foundation, excavating the foundation, laying cushion layers, binding reinforcing steel bars, pouring concrete, curing and the like, so that the construction process is clearer, and the construction method is favorable for constructors to operate. The foundation position and the size are determined according to the design drawing, so that the foundation construction of the bridge can be ensured to meet the design requirement, and a good foundation is laid for subsequent construction. Through laying the bed course in the foundation bottom, use rubble or sand class material generally, can improve the bearing capacity of basis, increase the stability and the security of bridge. Through binding the reinforcing bar in the basis, ensure that the position and the quantity of reinforcing bar are correct, can improve concrete structure's intensity and stability, prevent the quality problem. Importance of concrete placement and curing: the pouring work of the concrete is carried out, the surface of the concrete is kept moist during the maintenance period, the drying and cracking are avoided, the strength and the stability of the concrete can be ensured, and the service life of the bridge is prolonged.
Optionally, the S7 bridge deck pavement includes the following construction steps:
S71, paving a waterproof layer: after the bridge main body structure is completed, performing bridge deck pavement construction, including a waterproof layer, a bridge deck pavement layer and the like;
S72, paving an installation bridge deck: according to the design requirements, proper bridge deck pavement materials such as asphalt concrete, cement concrete and the like are selected, and are paved and compacted.
By adopting the technical scheme, after the bridge main body structure is completed, construction of bridge deck pavement is carried out, and the construction comprises paving of a waterproof layer. The waterproof layer can effectively prevent moisture infiltration bridge floor, protects the major structure of bridge, prolongs the life of bridge. According to the design requirements, proper bridge deck pavement materials such as asphalt concrete, cement concrete and the like are selected. The proper bridge deck pavement material is selected to ensure the bearing capacity, durability and travelling comfort of the bridge deck. Paving and compacting work is carried out, so that the leveling and compacting of the bridge deck pavement layer are ensured. The paving and compacting processes can ensure the flatness and stability of the bridge deck and improve the driving safety and comfort.
Optionally, the demolding device that adopts in S61 includes roof-rack, operation platform, hoisting assembly and slip subassembly, the roof-rack is located bridge major structure, the roof-rack includes two horizontal poles that are parallel to each other, through connecting rod fixed connection between two horizontal poles, the length direction of horizontal pole with the width direction of bridge is parallel, the horizontal pole both ends extend to outside the bridge main body, slip subassembly is equipped with two, and two slip subassemblies are installed with two horizontal pole cooperation respectively, operation platform is equipped with two, and two operation platforms are located bridge main body along length direction' S both sides respectively, operation platform passes through hoisting assembly and is connected with slip subassembly.
Through adopting above-mentioned technical scheme, the in-process of form removal adopts foretell form removal device, and the staff stands on operation platform and can carry out the form removal operation, need not to set up the tripod, has improved the efficiency of construction greatly. When the formwork is disassembled, the lifting assembly drives the lower part of the operation platform to the two sides of the bridge main body, then the staff dismantles the templates at the two sides of the bridge, and after the disassembly is completed, the sliding assembly drives the operation platform to move towards the direction deviating from the bridge main body, so that the templates are driven to be separated from the bridge main body, and then the lifting assembly drives the operation platform to lift. The mold stripping device can greatly improve the mold stripping efficiency, thereby effectively shortening the construction period.
Optionally, the slip subassembly includes two mount pads and driving piece, the mount pad with horizontal pole sliding connection, the slip direction of mount pad with the length direction of horizontal pole is unanimous, the driving piece is used for the drive the mount pad slides, the promotion subassembly is located on the mount pad.
Through adopting above-mentioned technical scheme, when needing the drawing of patterns, drive two mount pads through the driving piece and slide towards the direction of keeping away from each other, drive the lifting means when the mount pad slides towards the direction that deviates from the bridge main part and remove, drive operation platform when lifting means removes, drive template lateral shifting when operation platform removes to accomplish the drawing of patterns operation.
Optionally, the driving piece includes driving motor and two-way screw rod, two-way screw rod tip with the horizontal pole rotates to be connected, two mount pad settings on the horizontal pole are run through in proper order to two sections reverse screw threads of two-way screw rod respectively with two mount pad threaded connection, driving motor is used for the drive two-way screw rod rotates.
Through adopting above-mentioned technical scheme, when needs drive mount pad slides, start driving motor, driving motor's output shaft drives two-way screw rod and rotates, because the horizontal pole has the guide effect to the slip of mount pad, drives two mount pads and moves towards the direction that is close to or keeps away from each other when consequently two-way screw rod rotates, and then can drive operation platform and remove.
Optionally, the horizontal pole includes two I-steel, and the opening of two I-steel deviates from the setting, and two I-steel pass through bolt fixed connection, is provided with the backing plate between two I-steel, and the backing plate makes between two I-steel form the spout that supplies the mount pad to slide, two-way screw rod tip with the backing plate rotates to be connected.
Through adopting above-mentioned technical scheme, foretell horizontal pole has dismantlement convenience, reuse's advantage, and the spout that forms between two channel-section steel can supply the mount pad to slide.
Optionally, the lifting assembly comprises a winch and a steel wire rope, wherein the winch is located on the installation seat and fixedly connected with the installation seat, and one end of the steel wire rope is wound on a reel of the winch, and the other end of the steel wire rope is fixedly connected with the operation platform.
By adopting the technical scheme, when the operating platform needs to be driven to lift, the winch is started, and the reel of the winch drives the steel wire rope to wind or unwind, so that the operating platform is driven to lift or descend.
Optionally, the demolding device still includes clamping assembly, the clamping assembly is provided with a plurality ofly, and a plurality of clamping assembly are close to the edge interval evenly distributed of bridge main part one side along operation platform, the clamping assembly includes upset motor, supporting seat, centre gripping cylinder and cardboard, upset motor's casing with operation platform fixed connection, the supporting seat with upset motor's output shaft fixed connection, the cylinder body of centre gripping cylinder with supporting seat fixed connection, cardboard one end with centre gripping cylinder's output shaft end fixed connection, centre gripping cylinder's flexible axis level sets up, upset motor's rotation axis with centre gripping cylinder's flexible axis is unanimous, the length direction of cardboard with centre gripping cylinder's flexible axis is perpendicular.
Through adopting above-mentioned technical scheme, when operation platform descends to the bridge both sides, the output shaft of centre gripping cylinder extends, then starts the upset motor and drives the supporting seat and rotate, drives centre gripping cylinder and cardboard when the supporting seat rotates for the cardboard rotates to template one side, then the output shaft of centre gripping cylinder drives the cardboard shrink, thereby presss from both sides the template tightly through the cardboard, then utilizes slip subassembly can order about template and bridge main part separation.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the construction scheme of the application provides a comprehensive and detailed bridge in-situ cast-in-situ construction process, focuses on details and quality control in the construction process, is beneficial to improving the construction quality and stability of the bridge, has certain practicability and operability, and is beneficial to shortening the construction period of the bridge and reducing the construction cost while guaranteeing the structural performance of the bridge;
2. According to the application, the die stripping device is adopted, when the die is stripped, the lifting assembly drives the lower part of the operation platform to the two sides of the bridge main body, then the staff dismount the templates at the two sides of the bridge, and after the dismounting is completed, the sliding assembly drives the operation platform to move towards the direction deviating from the bridge main body, so that the templates are driven to be separated from the bridge main body, and then the lifting assembly drives the operation platform to lift. The mold stripping device can greatly improve the mold stripping efficiency, thereby effectively shortening the construction period.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present application;
FIG. 2 is a schematic illustration of the structure of a rail and slide assembly of an embodiment of the present application;
FIG. 3 is a schematic view of a lifting assembly according to an embodiment of the present application;
fig. 4 is an enlarged view of the portion a of fig. 3 in accordance with the present application.
Reference numerals illustrate: 1. a top frame; 11. a cross bar; 111. i-steel; 112. a chute; 2. an operating platform; 3. a lifting assembly; 31. a hoist; 32. a wire rope; 4. a sliding assembly; 41. a mounting base; 42. a driving motor; 43. a bidirectional screw; 5. a clamping assembly; 51. a turnover motor; 52. a support base; 53. a clamping cylinder; 54. and (5) clamping plates.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
The embodiment of the application discloses a bridge in-situ cast-in-situ construction method. The bridge in-situ cast-in-situ construction method comprises the following steps:
S1, foundation construction;
s11, determining a basic position: determining the position and the size of a bridge foundation according to the design drawing;
S12, excavating a foundation: excavating a foundation by using equipment such as an excavator and the like, so as to ensure the bottom of the foundation to be flat;
S13, paving a cushion layer: paving a layer of cushion layer at the bottom of the foundation, and usually using materials such as broken stone or sand and the like to improve the bearing capacity of the foundation;
S14, binding reinforcing steel bars: binding reinforcing steel bars in the foundation according to design requirements, and ensuring correct positions and number of the reinforcing steel bars;
s15, pouring concrete: after the binding of the steel bars is completed, pouring the concrete;
S16, maintenance: after the concrete pouring is finished, maintenance work is carried out, the surface of the concrete is kept moist during maintenance, and drying and cracking are avoided.
S2, installing a template;
s21, designing a template: according to the structural shape of the bridge, a proper template is designed, so that the shape and the size of the concrete structure are ensured to meet the design requirements;
s22, installing a template: installing the template on a foundation or a finished concrete structure, and ensuring the position and stability of the template;
S23, adjusting a template: adjusting the template to enable the template to meet the shape and the size of the design requirement;
s24, fixing a template: bolts, nuts, supports, etc. are used to secure the form to the foundation or finished concrete structure to prevent movement or deformation of the form.
S3, binding reinforcing steel bars;
S31, preparing a reinforcing steel bar: preparing required reinforced bar materials according to the requirements of a design drawing;
S32, binding reinforcing steel bars: binding and fixing the steel bars in the template according to the requirements of a design drawing, and ensuring the correct positions and the correct number of the steel bars;
s33, connecting reinforcing steel bars: the steel bars are connected according to the need, and welding, mechanical connection and other methods are usually used;
s34, checking the steel bars: after the binding of the steel bars is completed, checking is performed to ensure that the quality and the position of the steel bars meet the design requirements.
S4, pouring concrete;
S41, preparing concrete: according to the design requirement, preparing a proper concrete mixing ratio, and stirring;
S42, transporting concrete: transporting the concrete to a construction site using a concrete mixer truck or pumping equipment;
S43, pouring concrete: pouring concrete into the template to ensure uniformity and compactness of the concrete;
s44, vibrating concrete: vibrating the concrete by using a vibrator to remove bubbles in the concrete and ensure the compactness of the concrete;
S45, trowelling the surface: after the concrete pouring is finished, trowelling the concrete surface by using a trowelling tool to make the concrete surface flat and smooth;
S5, maintenance: after the concrete pouring is completed, the pouring body is covered with moisturizing cloth, and the curing time is 7 days to 28 days.
S6, removing the die;
S61, removing the template: removing templates on two sides of the bridge by adopting a template removing device;
S62, cleaning a template: and cleaning and maintaining the removed template for the next use.
S7, paving a bridge deck;
S71, paving a waterproof layer: after the bridge main body structure is completed, performing bridge deck pavement construction, including a waterproof layer, a bridge deck pavement layer and the like;
S72, paving an installation bridge deck: according to the design requirements, proper bridge deck pavement materials such as asphalt concrete, cement concrete and the like are selected, and are paved and compacted.
Referring to fig. 1 and 2, the stripping apparatus employed in S61 includes a top frame 1, an operation platform 2, a lifting assembly 3, a sliding assembly 4, and a clamping assembly 5.
Referring to fig. 1 and 2, the top frame 1 is located on a bridge main body structure, the top frame 1 includes two cross bars 11 disposed parallel to each other, the two cross bars 11 are welded and fixed by a connecting rod, the length direction of the cross bars 11 is parallel to the width direction of the bridge main body, and two ends of the cross bars 11 extend out of the bridge main body. The cross bar 11 comprises two I-beams 111, openings of the two I-beams 111 are arranged away from each other, the two I-beams 111 are fixedly connected through bolts, a base plate is arranged between the two I-beams 111, and a sliding groove 112 along the length direction is formed between the two I-beams 111 through the base plate.
Referring to fig. 1 and 2, two sliding assemblies 4 are provided, and the two sliding assemblies 4 are respectively matched with two cross bars 11. The sliding assembly 4 comprises two mounting seats 41 and a driving piece, wherein the mounting seats 41 are slidably connected in the sliding grooves 112 of the cross rod 11, and the sliding direction of the mounting seats 41 is consistent with the length direction of the cross rod 11. The driving piece comprises a driving motor 42 and a bidirectional screw 43, the bidirectional screw 43 is rotationally connected with a cushion block in the cross rod 11, the rotation axis of the bidirectional screw 43 is parallel to the length direction of the cross rod 11, the bidirectional screw 43 sequentially penetrates through two mounting seats 41 on the cross rod 11, two sections of reverse threads of the bidirectional screw 43 are respectively in threaded connection with the two mounting seats 41, a shell of the driving motor 42 is fixedly connected with the cross rod 11 through screws, and an output shaft of the driving motor 42 is coaxially and fixedly connected with one end of the bidirectional screw 43 through keys.
Referring to fig. 1 and 3, the lifting assemblies 3 are four, the four lifting assemblies 3 are respectively located at two ends of the two cross bars 11, the four lifting assemblies 3 are respectively installed in cooperation with four installation seats 41, the lifting assemblies 3 comprise a winch 31 and a steel wire rope 32, the winch 31 is located on the installation seats 41 and is fixedly connected with the installation seats 41 through screws, one end of the steel wire rope 32 is wound on a reel of the winch 31, and the other end of the steel wire rope 32 is fixedly connected with the operating platform 2.
Referring to fig. 1 and 3, two operation platforms 2 are provided, the two operation platforms 2 are respectively located at two sides of the bridge main body along the length direction, the operation platforms 2 are fixedly connected with the bottom of the steel wire rope 32, and the operation platforms 2 are formed by welding steel materials.
Referring to fig. 3 and 4, a plurality of clamping assemblies 5 are provided, in this embodiment, six clamping assemblies 5 are provided, the six clamping assemblies 5 are located at one side of the operation platform 2 close to the template, and the six clamping assemblies 5 are uniformly distributed along the edge of the operation platform 2 at intervals. The clamping assembly 5 comprises a turnover motor 51, a supporting seat 52, a clamping cylinder 53 and a clamping plate 54, wherein a shell of the turnover motor 51 is fixedly connected with an operating platform 2 through screws, the supporting seat 52 is fixedly connected with an output shaft of the turnover motor 51, a cylinder body of the clamping cylinder 53 is fixedly connected with the supporting seat 52 through screws, one end of the clamping plate 54 is fixedly connected with an output shaft end of the clamping cylinder 53, a telescopic axis of the clamping cylinder 53 is horizontally arranged, a rotation axis of the turnover motor 51 is consistent with the telescopic axis of the clamping cylinder 53, and the length direction of the clamping plate 54 is perpendicular to the telescopic axis of the clamping cylinder 53.
The implementation principle of the bridge in-situ cast-in-situ construction method provided by the embodiment of the application is as follows: the construction method sequentially comprises foundation construction, template installation, steel bar binding, concrete pouring, maintenance, form removal and the like, so that the construction process is clearer and is beneficial to operation of constructors. It is emphasized that designing a suitable form according to the structural shape of the bridge and ensuring the position and stability of the form helps to ensure that the shape and dimensions of the concrete structure meet the design requirements. The method has the advantages that binding and fixing of the steel bars are carried out according to the requirements of the design drawing, and connection is carried out according to the requirements, so that the strength and the stability of the concrete structure can be improved. The concrete mixing, transporting, pouring and vibrating processes are described in detail, emphasizing the uniformity and compactness of the concrete, which helps to ensure the quality of the concrete structure. The method mentions that the maintenance is carried out after the concrete pouring is completed, the moisturizing cloth is covered and the maintenance is carried out for a certain time, which is helpful for ensuring the strength and the stability of the concrete. Meanwhile, the form removal device is adopted to remove the form, so that the construction efficiency is improved and the damage of the form is reduced.
During the form removal, drive operation platform 2 through lifting means 3 and descend to bridge main part both sides, then the staff dismantles the template of bridge both sides, after dismantling the completion, start driving motor 42, driving motor 42's output shaft drives bi-directional screw 43 and rotates, because horizontal pole 11 has the guide effect to the slip of mount pad 41, drive two mount pads 41 and move towards the direction that is close to or keeps away from each other when consequently bi-directional screw 43 rotates, and then can drive operation platform 2 and remove, thereby drive template and bridge main part break away from, then lifting means 3 drive operation platform 2 rise can be with the template lift. The mold stripping device can greatly improve the mold stripping efficiency, thereby effectively shortening the construction period.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (9)
1. A bridge in-situ cast-in-situ construction method is characterized in that: the construction method comprises the following construction steps:
S1, foundation construction;
s2, installing a template;
s21, designing a template: according to the structural shape of the bridge, a proper template is designed, so that the shape and the size of the concrete structure are ensured to meet the design requirements;
s22, installing a template: installing the template on a foundation or a finished concrete structure, and ensuring the position and stability of the template;
S23, adjusting a template: adjusting the template to enable the template to meet the shape and the size of the design requirement;
s24, fixing a template: fixing the form on the foundation or the finished concrete structure by using bolts, nuts, supports and the like to prevent the form from moving or deforming;
S3, binding reinforcing steel bars;
S31, preparing a reinforcing steel bar: preparing required reinforced bar materials according to the requirements of a design drawing;
S32, binding reinforcing steel bars: binding and fixing the steel bars in the template according to the requirements of a design drawing, and ensuring the correct positions and the correct number of the steel bars;
s33, connecting reinforcing steel bars: the steel bars are connected according to the need, and welding, mechanical connection and other methods are usually used;
s34, checking the steel bars: after the binding of the steel bars is completed, checking is carried out to ensure that the quality and the position of the steel bars meet the design requirements;
S4, pouring concrete;
S41, preparing concrete: according to the design requirement, preparing a proper concrete mixing ratio, and stirring;
S42, transporting concrete: transporting the concrete to a construction site using a concrete mixer truck or pumping equipment;
S43, pouring concrete: pouring concrete into the template to ensure uniformity and compactness of the concrete;
s44, vibrating concrete: vibrating the concrete by using a vibrator to remove bubbles in the concrete and ensure the compactness of the concrete;
S45, trowelling the surface: after the concrete pouring is finished, trowelling the concrete surface by using a trowelling tool to make the concrete surface flat and smooth;
S5, maintenance: after the concrete pouring is completed, covering the pouring body with moisturizing cloth, wherein the curing time is 7-28 days;
s6, removing the die;
S61, removing the template: removing templates on two sides of the bridge by adopting a template removing device;
S62, cleaning a template: cleaning and maintaining the removed template for the next use;
s7, paving the bridge deck.
2. The bridge in-situ cast-in-situ construction method according to claim 1, wherein the method comprises the following steps: the S1 foundation construction comprises the following construction steps:
s11, determining a basic position: determining the position and the size of a bridge foundation according to the design drawing;
S12, excavating a foundation: excavating a foundation by using equipment such as an excavator and the like, so as to ensure the bottom of the foundation to be flat;
S13, paving a cushion layer: paving a layer of cushion layer at the bottom of the foundation, and usually using materials such as broken stone or sand and the like to improve the bearing capacity of the foundation;
S14, binding reinforcing steel bars: binding reinforcing steel bars in the foundation according to design requirements, and ensuring correct positions and number of the reinforcing steel bars;
s15, pouring concrete: after the binding of the steel bars is completed, pouring the concrete;
S16, maintenance: after the concrete pouring is finished, maintenance work is carried out, the surface of the concrete is kept moist during maintenance, and drying and cracking are avoided.
3. The bridge in-situ cast-in-situ construction method according to claim 1, wherein the method comprises the following steps: the S7 bridge deck pavement comprises the following construction steps:
S71, paving a waterproof layer: after the bridge main body structure is completed, performing bridge deck pavement construction, including a waterproof layer, a bridge deck pavement layer and the like;
S72, paving an installation bridge deck: according to the design requirements, proper bridge deck pavement materials such as asphalt concrete, cement concrete and the like are selected, and are paved and compacted.
4. The bridge in-situ cast-in-situ construction method according to claim 1, wherein the method comprises the following steps: the utility model provides a take out mould device that adopts in S61 includes roof-rack (1), operation platform (2), hoisting assembly (3) and slip subassembly (4), roof-rack (1) is located bridge major structure, roof-rack (1) is including two horizontal poles (11) that are parallel to each other, through connecting rod fixed connection between two horizontal poles (11), the length direction of horizontal pole (11) with the width direction of bridge is parallel, outside extending to the bridge main part at horizontal pole (11) both ends, slip subassembly (4) are equipped with two, two slip subassemblies (4) respectively with two horizontal poles (11) cooperation installations, operation platform (2) are equipped with two, two operation platforms (2) are located bridge main part along length direction' S both sides respectively, operation platform (2) are connected with slip subassembly (4) through hoisting assembly (3).
5. The bridge in-situ cast-in-situ construction method according to claim 4, wherein the method comprises the following steps: the sliding assembly (4) comprises two mounting seats (41) and a driving piece, the mounting seats (41) are in sliding connection with the cross rod (11), the sliding direction of the mounting seats (41) is consistent with the length direction of the cross rod (11), the driving piece is used for driving the mounting seats (41) to slide, and the lifting assembly (3) is located on the mounting seats (41).
6. The bridge in-situ cast-in-situ construction method according to claim 5, wherein the method comprises the following steps: the driving piece comprises a driving motor (42) and a bidirectional screw (43), the end part of the bidirectional screw (43) is rotationally connected with the cross rod (11), the bidirectional screw (43) sequentially penetrates through two mounting seats (41) on the cross rod (11), two sections of reverse threads of the bidirectional screw (43) are respectively in threaded connection with the two mounting seats (41), and the driving motor (42) is used for driving the bidirectional screw (43) to rotate.
7. The bridge in-situ cast-in-situ construction method according to claim 6, wherein the method comprises the following steps: the transverse rod (11) comprises two I-beams (111), openings of the two I-beams (111) are arranged in a deviating mode, the two I-beams (111) are fixedly connected through bolts, a base plate is arranged between the two I-beams (111), a sliding groove (112) for sliding an installation seat (41) is formed between the two I-beams (111) through the base plate, and the end portion of the bidirectional screw (43) is rotationally connected with the base plate.
8. The bridge in-situ cast-in-situ construction method according to claim 7, wherein the method comprises the following steps: the lifting assembly (3) comprises a winch (31) and a steel wire rope (32), the winch (31) is located on the installation seat (41) and is fixedly connected with the installation seat (41), and one end of the steel wire rope (32) is wound on a reel of the winch (31), and the other end of the steel wire rope is fixedly connected with the operation platform (2).
9. The bridge in-situ cast-in-situ construction method according to claim 8, wherein the method comprises the following steps: the demolding device further comprises a clamping assembly (5), the clamping assembly (5) is provided with a plurality of clamping assemblies (5) which are evenly distributed along the edge interval of one side, close to the bridge main body, of the operation platform (2), each clamping assembly (5) comprises a turnover motor (51), a supporting seat (52), a clamping cylinder (53) and a clamping plate (54), a shell of each turnover motor (51) is fixedly connected with the operation platform (2), the supporting seat (52) is fixedly connected with an output shaft of each turnover motor (51), a cylinder body of each clamping cylinder (53) is fixedly connected with the supporting seat (52), one end of each clamping plate (54) is fixedly connected with an output shaft end part of each clamping cylinder (53), the telescopic axis of each clamping cylinder (53) is horizontally arranged, the rotation axis of each turnover motor (51) is consistent with the telescopic axis of each clamping cylinder (53), and the length direction of each clamping plate (54) is perpendicular to the telescopic axis of each clamping cylinder (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410456654.9A CN118148032A (en) | 2024-04-16 | 2024-04-16 | Bridge in-situ cast-in-situ construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410456654.9A CN118148032A (en) | 2024-04-16 | 2024-04-16 | Bridge in-situ cast-in-situ construction method |
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| Publication Number | Publication Date |
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| CN118148032A true CN118148032A (en) | 2024-06-07 |
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| CN202410456654.9A Pending CN118148032A (en) | 2024-04-16 | 2024-04-16 | Bridge in-situ cast-in-situ construction method |
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| Country | Link |
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| CN (1) | CN118148032A (en) |
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