CN111749142A - 0# block assembled bracket design based on BIM and construction method thereof - Google Patents
0# block assembled bracket design based on BIM and construction method thereof Download PDFInfo
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- CN111749142A CN111749142A CN202010755070.3A CN202010755070A CN111749142A CN 111749142 A CN111749142 A CN 111749142A CN 202010755070 A CN202010755070 A CN 202010755070A CN 111749142 A CN111749142 A CN 111749142A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
- E04G3/243—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons following the outside contour of a building
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
Abstract
The invention provides a 0# block assembly type bracket design based on BIM and a construction method thereof, which are used for full three-dimensional design and check calculation, and improving the optimization efficiency and feasibility of a 0# block assembly type bracket. Belongs to the field of building engineering.
Description
Technical Field
The invention relates to a 0# block assembled bracket design based on BIM and a construction method thereof, belonging to the field of constructional engineering.
Background
The construction of the 0# block is used as a key construction process in bridge engineering, and supports need to be erected during construction. At present, firstly, a bracket is designed by utilizing a CAD plane and a construction drawing is produced, tripod mounting holes are pre-embedded on site, then a welding triangular bracket is hoisted after the concrete strength reaches the standard, then all tripods are welded and connected by using a cross beam, and finally an I-shaped steel distribution beam is fully paved on the tripods and a full-space bracket is mounted to serve as a supporting system of a 0# block template and an operating platform. The method has the following problems: firstly, the CAD plane design efficiency is low, the modification is complicated, the visual and intuitive expression cannot be realized, and the technical background effect is poor; secondly, the design result is checked and calculated by hand, and the calculation result has larger error; thirdly, the construction of the traditional 0# bracket is complicated, the time consumption is long and the construction safety risk is high.
Disclosure of Invention
The invention provides a 0# block assembled bracket design based on BIM and a construction method thereof, and aims to solve the problems of low efficiency, complex modification, large structure detection and calculation error, high support mounting and dismounting difficulty, high construction risk and the like in the conventional method.
In order to achieve the purpose, a 0# block assembly type bracket based on BIM is supposed to be adopted, multiple groups of triangular brackets are symmetrically constructed on two opposite sides of a pier, lantern frames are symmetrically fixed on the multiple groups of triangular brackets on the two sides, a distribution beam is laid on the triangular bracket on each side along the distribution direction of the triangular brackets, the bottoms of the lantern frames are fixed on the distribution beam, unloading blocks are further fixed at the upper ends of stand columns of the lantern frames, a template bearing surface is arranged at the upper ends of the unloading blocks, and the template bearing surface is obliquely and downwards arranged towards the direction where the pier is located.
In the fully-assembled bracket, the lantern frame is formed by four lantern frame stand columns which are distributed along four square corners, and two adjacent lantern frame stand columns are connected and fixed through a cross brace;
in the fully-assembled bracket, the upper end and the lower end of the lantern stand column are respectively fixed with a connecting steel plate, and the lantern stand column is fixedly connected with the distribution beam and the unloading block through the connecting steel plates.
The construction method comprises the following steps:
1) three-dimensional BIM modeling
Firstly, establishing a pier and a 0# block three-dimensional entity model by using Autodesk Inventor software according to a construction design drawing;
determining the elevation and the position of each part of the support according to the three-dimensional models of the bridge piers and the 0# block;
thirdly, designing a fully-assembled bracket according to the structure by using Autodesk Inventor software;
2) force analysis
Firstly, carrying out preliminary checking calculation by using a structural member stress analysis module carried by Autodesk Inventor software, preliminarily determining whether the structure stress is feasible, and optimizing the structure until the structure stress passes the checking calculation if the structure stress does not pass the checking calculation;
secondly, after the data format of the model is converted, the model is introduced into a meshless analysis software Altair SimSOLid to carry out structure checking calculation and compare with the analysis result in an Autodesk Inventor, and the reason of difference existing in the analysis checking calculation is adjusted;
thirdly, finally, introducing the product into an Ansys Workbench for final structure check calculation, verifying the feasibility of the 0# block fully-assembled bracket structure, comparing the feasibility with the analysis results of Autodesk Inventor and Altair SimSolid software, analyzing reasons, adjusting assigned values of boundary conditions, reducing the difference of the check calculation of each software, and enhancing the feasibility of the structure check calculation;
fourthly, compiling the calculation book of the structure according to the detection and calculation result.
After the feasibility of the stress analysis of the step 2) is passed, the following operations can be carried out:
3) technical crossing bottom
Firstly, deriving a two-dimensional and three-dimensional construction plan of a 0# block bracket by adopting the function of a self-contained map-making module of Autodesk Inventor software, and counting the number of various types of steel to derive a BOM number table to provide a reference basis for material purchasing;
secondly, the three-dimensional model is used for directly carrying out three-dimensional visual intersection on workers, the images are visually displayed, control indexes in construction such as I-steel models and length data are described, and then a construction plan is provided for the workers, so that the understanding of the workers on structural members is deepened, and errors in construction are reduced;
the processing method of the assembled bracket comprises the following steps:
the triangular bracket is formed by welding an I45a cross rod, an I45a vertical rod and an I45a diagonal rod, wherein an I32a diagonal support rod is arranged in the triangular bracket;
secondly, the lantern frame is formed by welding section steel and steel pipes, the upright posts of the lantern frame are phi 350x10mm steel pipes, the cross bars are I20a I-shaped steel, and the diagonal braces of the scissors are 16 channel steel; the lantern frame is 2.2m long (in the transverse bridge direction), 2.5m wide (in the bridge direction), 2.66m high in the front row of upright columns, 2.33m high in the rear row of upright columns, 0.3m away from the bottom and the top of the two ends of the upright columns are welded into a whole by I20I-shaped steel to form a lantern frame member, and each surface of the lantern frame is welded by [16 channel steel ] to form a cross brace, so that the overall stability of the lantern frame is improved; steel plates with the thicknesses of 16mm and the sizes of 950x950mm and 600x600mm are welded at the bottom and the top of the lantern frame respectively, and 0.3mx0.3m triangular steel plates are adopted to weld the steel plates and the steel plates at the periphery after the steel plates and the steel plates are welded, wherein each end is not less than 4; the top steel plate of the lantern frame is provided with holes to form a flange steel plate, each steel plate is provided with at least 8 holes, each side is provided with 3 bolt holes, the distance between each bolt hole and the edge of the steel plate is 7cm, the distance between each bolt hole is 23cm, and the diameter of each bolt hole is 28 mm; 4 lantern frame bodies are constructed and processed for each No. 0 block, an unloading block is arranged at the top of a vertical column of the lantern frame, the unloading block is made of a phi 350x10mm steel pipe and is 0.25m high, steel plates with the thickness of 16mm and the size of 600x600mm are welded at the bottom and the top of two ends of the unloading block, the steel plates and the steel plates are welded by 0.3mx0.3m triangular steel plates at the periphery after the steel plates and the steel pipes are welded, and each end is not less than 4; the bottom steel plate of the unloading block is provided with holes to form a flange steel plate, the holes of each steel plate are not less than 8, each side of each steel plate is provided with 3 bolt holes, the distance between each bolt hole and the edge of the steel plate is 7cm, and the distance between each bolt hole and the edge of the steel plate is 23 cm.
The mounting and dismounting method of the assembly type bracket comprises the following steps:
mounting of triangular bracket
Hoisting the triangular bracket according to the designed position and elevation, and fixing the triangular bracket in place;
installation of distributing beam
3I-beams are arranged at the top of the bracket in the horizontal direction 3m away from the pier body, another group of 3I-beams I32a are arranged at the position 1.89m away from the outermost I-beam, and the distance between every two I-beams is 30 cm; the transverse bridge between each group of I-shaped steel is welded and connected into a whole by using a 1cm thick steel plate at each interval of 1m in the transverse bridge direction; the two sides of the distribution beam and the bracket cross beam are welded and limited by adopting a twisted steel bar, so that the distribution beam is prevented from sliding;
mounting lantern rack and unloading block
Directly hoisting the processed lantern frames at the tops of the installed distribution beams, wherein two lantern frames are respectively installed on the longitudinal two sides of each pier body, the distance from the transverse bridge of the lantern frame to the nearest upright post to the central line of the box girder is 0.85m, and the projection side line of the longitudinal nearest upright post to the pier cap is 54 cm; the bottom of each lantern frame and the distribution beam are welded and limited by steel bars, and the two lantern frames are temporarily welded and cross-braced by channel steel, so that the overall stability of the lantern frames is improved; the unloading blocks are connected with the lantern frame vertical columns through bolts, the number of the bolts between each vertical column and each unloading block is not less than 8, and double nuts are completely sleeved on the bolts so as to ensure effective connection between the unloading blocks and the lantern frame;
installing the template
The continuous beam No. 0 block bottom die is installed by adopting a cradle bottom die, a cradle bottom die system is assembled on an unloading block, a cradle rear cross beam is directly arranged on a rear-row unloading block, a front row of the unloading block is provided with a cross beam with the same height and strength as those of a cradle front cross beam, the cradle bottom system is supported, and a limiting notch is welded by profile steel to prevent slippage; after the rear cross beam and the supporting cross beam of the hanging basket are installed, the rear cross beam is fixed on a bracket support at the bottom by adopting two steel wire ropes, then a bottom die longitudinal distribution beam and a front cross beam of the hanging basket are installed, the rear cross beam and the bottom die longitudinal distribution beam are connected by adopting bolts designed by the original hanging basket, and the front cross beam of the hanging basket is connected with the longitudinal distribution beam of the bottom die by bolts; after the bottom die longitudinal distribution beam is installed, paving the bottom die, paving a hanging basket bottom die on the top of the bottom die longitudinal distribution beam, and adjusting the hanging basket bottom die to be at a designed position;
when a No. 0 continuous beam block side die is installed, I-shaped steel is installed on the top surfaces of front and rear cross beams of the hanging basket, 2I-shaped steel bodies are arranged on each side, and profile steel is adopted among the I-shaped steel bodies, the rear cross beams and the front supporting cross beams for welding and limiting; the bottom of the side die scaffold is arranged on the top surface of I45a I-shaped steel, profile steel is used for welding temporary support on a bottom plate and a side die support when the side die is arranged, after the templates on two sides are arranged, the two ends of the top are welded and connected into a whole by adopting the I-shaped steel, and finish-rolled deformed steel bars are adopted between the templates for counter-pulling;
fifthly, dismantling the assembled frame
a. And after the casting of the 0# block of the continuous beam and the tensioning and grouting are finished, the 0# block bearing system can be detached.
b. Before the bearing system is dismantled, firstly, anchoring the hanging basket bottom die system on a beam body bottom plate by using finish rolling deformed steel bars, wherein anchoring points are arranged on cross sections of hanging basket cross beams, 4 anchoring points are arranged on each cross section, the anchoring points of the bottom plate are arranged 40cm away from the inner side of a web plate, the anchoring points of a flange plate are arranged 40cm away from the position of the web plate, and the upper end and the lower end of each anchoring point are both anchored by adopting double nuts;
c. then cutting the limiting profile steel of the unloading block 5 by using a cutting gun, separating the unloading block from the cradle bottom die system, and removing the unloading block 5;
d. after the unloading block is removed, a manual hoist is adopted to pull the lantern racks, before the lantern racks are pulled, the temporary connection between the two lantern racks on the same side needs to be removed, and then the hoist is pulled slowly to enable the lantern racks to move slowly to one side on the distribution beam; when the lantern frame front end is about to break away from the distribution roof beam, stop moving this moment, pass through wire rope with another calabash and be connected with the lantern frame, the calabash hoisting point sets up on the flange board, and make the calabash begin the atress, when dragging the lantern frame forward this moment, another calabash is taut simultaneously, keep the atress can, when the lantern frame breaks away from the distribution roof beam, the weight of lantern frame this moment is born by flange board calabash completely, then utilize the crane to hang down the lantern frame can.
Compared with the prior art, the invention replaces the traditional CAD plane design and manual calculation work by the BIM technology and the simulation analysis technology, can be used for three-dimensional visual intersection and construction drawing while completing the design, and greatly improves the working efficiency; the 0# piece full-assembly bracket is satisfying under the stable prerequisite of atress, and the innovative adoption lantern frame has replaced the traditional method of setting up full hall support as bearing structure, when practicing thrift construction period, has reduced the construction risk, and the bracket of assembled can be repeated many times to be led and use, has practiced thrift construction cost greatly. The technical method has the advantages of high design efficiency, convenient and quick installation and disassembly of the device, reusability, cost saving, application in multiple project practices and remarkable benefit.
Drawings
FIG. 1 is a flow chart of the construction of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Examples
Referring to fig. 2, the present embodiment provides a 0# block fabricated bracket based on BIM, a plurality of sets of triangular brackets 2 are symmetrically constructed on opposite sides of a pier 1, lantern frames 3 are symmetrically fixed on the sets of triangular brackets 2 on the two sides, the lantern frames 3 are formed by four lantern frame columns distributed along four square corners, two adjacent lantern frame columns are connected and fixed through a cross brace, a distribution beam 4 is laid on the triangular bracket 2 on each side along the distribution direction of the triangular brackets 2, the bottom of the lantern frame 3 is fixed on the distribution beam 4, and the upper end of the upright post of the lantern frame 3 is also fixed with an unloading block 5, the upper end of the unloading block 5 is provided with a template bearing surface, and the bearing surface of the template is obliquely and downwards arranged towards the direction of the pier 1, the upper end and the lower end of the lantern stand column are respectively fixed with a connecting steel plate, and the lantern stand column is fixedly connected with the distribution beam 4 and the unloading block 5 through the connecting steel plates.
Referring to fig. 1, the concrete construction method is as follows:
1) three-dimensional BIM modeling
Firstly, establishing a pier and a 0# block three-dimensional entity model by using Autodesk Inventor software according to a construction design drawing;
determining the elevation and the position of each part of the support according to the three-dimensional models of the bridge piers and the 0# block;
thirdly, the automatic Inventor software is utilized to carry out the design of a fully-assembled bracket according to the structure, the triangular bracket part is formed by welding 45a I-steel and 32a I-steel, the upper distribution beam 4 is laid by the 32a I-steel, the upright post of the lantern frame 3 is a phi 350x10mm steel pipe post, the steel pipe post connecting piece is connected by the 20a I-steel and 16 channel steel, the upper surface and the lower surface of the upright post are welded by steel plates to increase the stress area, and the unloading block is made of the steel pipe post with the same size as the upright post and is connected with the upright post by bolts;
2) force analysis
Firstly, carrying out preliminary checking calculation by using a structural member stress analysis module carried by Autodesk Inventor software, preliminarily determining whether the structure stress is feasible, and optimizing the structure until the structure stress passes the checking calculation if the structure stress does not pass the checking calculation;
secondly, after the data format of the model is converted, the model is introduced into a meshless analysis software Altair SimSOLid to carry out structure checking calculation and compare with the analysis result in an Autodesk Inventor, and the reason of difference existing in the analysis checking calculation is adjusted;
thirdly, finally, introducing the product into an Ansys Workbench for final structure check calculation, verifying the feasibility of the 0# block fully-assembled bracket structure, comparing the feasibility with the analysis results of Autodesk Inventor and Altair SimSolid software, analyzing reasons, adjusting assigned values of boundary conditions, reducing the difference of the check calculation of each software, and enhancing the feasibility of the structure check calculation;
fourthly, compiling a calculation book of the structure according to the detection and calculation result;
3) technical crossing bottom
Firstly, deriving a two-dimensional and three-dimensional construction plan of a 0# block bracket by adopting the function of a self-contained map-making module of Autodesk Inventor software, and counting the number of various types of steel to derive a BOM number table to provide a reference basis for material purchasing;
secondly, the three-dimensional model is used for directly carrying out three-dimensional visual intersection on workers, the images are visually displayed, control indexes in construction such as I-steel models and length data are described, and then a construction plan is provided for the workers, so that the understanding of the workers on structural members is deepened, and errors in construction are reduced;
4) fabricated stent processing
The triangular bracket 2 is formed by welding an I45a cross rod, an I45a vertical rod and an I45a diagonal rod, wherein an I32a diagonal support rod is arranged in the triangular bracket;
secondly, the lantern frame 3 is formed by welding section steel and steel pipes, the upright posts of the lantern frame 3 are made of phi 350x10mm steel pipes, the cross bars are made of I20a I-shaped steel, and the diagonal braces of the scissors are made of 16-channel steel; the lantern frame 3 is 2.2m long (in the transverse bridge direction), 2.5m wide (in the bridge direction), 2.66m high in the front row of upright columns, 2.33m high in the rear row of upright columns, 0.3m away from the bottom and the top of the two ends of the upright columns are welded into a whole by I20I-steel to form a lantern frame member, and each surface of the lantern frame 3 is welded with [16 channel steel to form a cross brace, so that the overall stability of the lantern frame 3 is improved; the bottom and the top of the lantern frame 3 are welded with steel plates with the thickness of 16mm and the sizes of 950x950mm and 600x600mm respectively, after the steel plates and the steel pipes are welded, 0.3mx0.3m triangular steel plates are adopted to weld the steel pipes and the steel plates, and each end is not less than 4; the steel plate at the top of the lantern frame 3 is provided with holes to form a flange steel plate, each steel plate is provided with at least 8 holes, each side is provided with 3 bolt holes, the distance between each bolt hole and the edge of the steel plate is 7cm, the distance between each bolt hole is 23cm, and the diameter of each bolt hole is 28 mm; 4 lantern frame bodies are constructed and processed for each No. 0 block, an unloading block is arranged at the top of a vertical column of the lantern frame, the unloading block is made of a phi 350x10mm steel pipe and is 0.25m high, steel plates with the thickness of 16mm and the size of 600x600mm are welded at the bottom and the top of two ends of the unloading block, the steel plates and the steel plates are welded by 0.3mx0.3m triangular steel plates at the periphery after the steel plates and the steel pipes are welded, and each end is not less than 4; unloading, wherein 5 bottom steel plates are provided with holes to form flange steel plates, each steel plate is provided with at least 8 holes, each side is provided with 3 bolt holes, the distance between each bolt hole and the edge of the steel plate is 7cm, and the distance between each bolt hole and the edge of the steel plate is 23 cm.
5) Assembling type support mounting and dismounting device
Mounting of triangular bracket
Hoisting the triangular bracket 2 according to the designed position and elevation, and fixing in place;
installation of distributing beam
3I-shaped steels I32a are arranged 3m away from the pier body in the horizontal direction of the top of the bracket, another group of 3I-shaped steels I32a are arranged 1.89m away from the outermost I-shaped steel, and the distance between every two I-shaped steels is 30 cm; the transverse bridge between each group of I-shaped steel is welded and connected into a whole by using a 1cm thick steel plate at each interval of 1m in the transverse bridge direction; the two sides of the distribution beam and the bracket beam are welded and limited by phi 25 twisted steel bars, so that the distribution beam is prevented from sliding;
mounting lantern rack and unloading block
Directly hoisting the processed lantern frames 3 at the tops of the installed distribution beams 4, wherein two lantern frames 3 are respectively installed on the longitudinal two sides of each pier body, the distance between the transverse bridge of each lantern frame 3 and the closest vertical column is 0.85m from the center line of the box girder, and the distance between the longitudinal closest vertical column and the projection side line of the pier cap is 54 cm; the bottom of each lantern frame 3 and the distribution beam 4 are welded and limited through a phi 25 steel bar, 16 channel steel is used for temporarily welding and bridging between the two lantern frames 3, and the overall stability between the lantern frames 3 is improved; the unloading blocks 5 are connected with the lantern frame 3 upright posts by M24x80mm bolts, the number of the bolts between each upright post and the unloading block 5 is not less than 8, and double nuts are completely sleeved on the upright posts so as to ensure the effective connection between the unloading blocks 5 and the lantern frame 3;
installing the template
The continuous beam No. 0 block bottom die is installed by adopting a cradle bottom die, a cradle bottom die system is assembled on an unloading block 5, a cradle rear cross beam is directly arranged on a rear-row unloading block 5, a front row of the unloading block 5 is provided with a cross beam with the same height and strength as a cradle front cross beam (or double-spliced I32a I-shaped steel), the cradle bottom system is supported, and a limiting notch is welded by using profile steel to prevent slippage; after the rear cross beam and the supporting cross beam of the hanging basket are installed, the rear cross beam is fixed on a bracket support at the bottom by adopting two steel wire ropes, then a bottom die longitudinal distribution beam and a front cross beam of the hanging basket are installed, the rear cross beam and the bottom die longitudinal distribution beam are connected by adopting bolts designed by the original hanging basket, and the front cross beam of the hanging basket is connected with the longitudinal distribution beam of the bottom die by bolts; after the bottom die longitudinal distribution beam is installed, paving the bottom die, paving a hanging basket bottom die on the top of the bottom die longitudinal distribution beam, and adjusting the hanging basket bottom die to be at a designed position;
when a No. 0 continuous beam block side die is installed, I45a I-shaped steels are installed on the top surfaces of front and rear cross beams of the hanging basket, 2I-shaped steels are arranged on each side, and the I-shaped steels, the rear cross beams and the front supporting cross beams are welded and limited by profile steels; the bottom of the side die scaffold is arranged on the top surface of I45a I-shaped steel, profile steel is used for welding a bottom plate and a side die bracket for temporary support when the side die is arranged, after the templates on two sides are arranged, two ends of the top are welded and connected into a whole by adopting I32a I-shaped steel, and the templates are oppositely pulled by adopting PSB830 phi 32 finish-rolled deformed steel bars;
fifthly, dismantling the assembled frame
a. And after the casting of the 0# block of the continuous beam and the tensioning and grouting are finished, the 0# block bearing system can be detached.
b. Before the bearing system is dismantled, anchoring the hanging basket bottom die system on a beam body bottom plate by PSB930 phi 32 finish rolling deformed steel bars, wherein anchoring points are arranged on cross sections of hanging basket cross beams, 4 anchoring points are arranged on each cross section, the anchoring points of the bottom plate are arranged 40cm away from the inner side of a web plate, the anchoring points of a flange plate are arranged 40cm away from the web plate, and two nuts are adopted for anchoring the upper end and the lower end of each anchoring point;
c. then cutting the limiting profile steel of the unloading block 5 by using a cutting gun, separating the unloading block 5 from the cradle bottom die system, and removing the unloading block 5;
d. after the unloading block 5 is removed, a 10T hand-operated hoist is adopted to pull the lantern racks 3, before the lantern racks 3 are pulled, the temporary connection between the two lantern racks 3 on the same side needs to be removed, and then the hoist is slowly pulled to enable the lantern racks 3 to slowly move to one side on the distribution beam 4; when the front end of the lantern frame 3 is about to break away from the distribution beam 4, stop moving this moment, pass through wire rope with another 10T calabash and be connected with lantern frame 3, the hoist hoisting point sets up on the flange plate, and make the hoist begin the atress, when pulling the lantern frame 3 forward this moment, another hoist is taut simultaneously, keep the atress can, when the lantern frame 3 breaks away from the distribution beam 4, the weight of lantern frame 3 is born by the flange plate hoist completely this moment, then utilize the crane to hang down lantern frame 3 can.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A0 # piece assembled bracket based on BIM which characterized in that: the relative bilateral symmetry of pier (1) is under construction and is had multiunit triangular bracket (2), the symmetry is fixed with lantern frame (3) on multiunit triangular bracket (2) of both sides, triangular bracket (2) of each side are gone up and are laid distribution roof beam (4) along the distribution direction of triangular bracket (2), the bottom of lantern frame (3) all is fixed in on distribution roof beam (4), and the stand upper end of lantern frame (3) still is fixed with off-load piece (5), the upper end of off-load piece (5) has the template loading end, and the template loading end sets up downwards towards pier (1) place direction slope.
2. The BIM-based 0# block fabricated bracket of claim 1, wherein: the lantern frame (3) is formed by four lantern frame stand columns distributed along four square corners, and two adjacent lantern frame stand columns are connected and fixed through the cross braces.
3. The BIM-based 0# block fabricated bracket of claim 1, wherein: the upper end and the lower end of the lantern stand column are respectively fixed with a connecting steel plate, and the lantern stand column is fixedly connected with the distribution beam (4) and the unloading block (5) through the connecting steel plates.
4. The construction method of the 0# block construction fully-assembled bracket of claim 1, characterized in that the concrete method comprises:
1) three-dimensional BIM modeling
Firstly, establishing a pier and a 0# block three-dimensional entity model by using Autodesk Inventor software according to a construction design drawing;
determining the elevation and the position of each part of the support according to the three-dimensional models of the bridge piers and the 0# block;
thirdly, designing a fully-assembled bracket according to the structure by using Autodesk Inventor software;
2) force analysis
Firstly, carrying out preliminary checking calculation by using a structural member stress analysis module carried by Autodesk Inventor software, preliminarily determining whether the structure stress is feasible, and optimizing the structure until the structure stress passes the checking calculation if the structure stress does not pass the checking calculation;
secondly, after the data format of the model is converted, the model is introduced into a meshless analysis software Altair SimSOLid to carry out structure checking calculation and compare with the analysis result in an Autodesk Inventor, and the reason of difference existing in the analysis checking calculation is adjusted;
thirdly, finally, introducing the product into an Ansys Workbench for final structure check calculation, verifying the feasibility of the 0# block fully-assembled bracket structure, comparing the feasibility with the analysis results of Autodesk Inventor and Altair SimSolid software, analyzing reasons, adjusting assigned values of boundary conditions, reducing the difference of the check calculation of each software, and enhancing the feasibility of the structure check calculation;
fourthly, compiling the calculation book of the structure according to the detection and calculation result.
5. The method for constructing the 0# block full-assembled bracket according to claim 4, wherein after the feasibility of the stress analysis is passed in the step 2), technical background is performed:
firstly, deriving a two-dimensional and three-dimensional construction plan of a 0# block bracket by adopting the function of a self-contained map-making module of Autodesk Inventor software, and counting the number of various types of steel to derive a BOM number table to provide a reference basis for material purchasing;
and secondly, directly performing three-dimensional visual intersection on workers by using the three-dimensional model, visually and intuitively displaying, explaining controllability index data in construction, and providing the controllability index data for the workers with a construction plan.
6. The construction method of the 0# block construction full-fabricated bracket according to claim 4, wherein the fabrication method of the fabricated bracket is as follows:
the triangular bracket (2) is formed by welding an I45a cross rod, an I45a vertical rod and an I45a diagonal rod, wherein an I32a diagonal support rod is arranged in the triangular bracket;
secondly, the lantern frame (3) is formed by welding section steel and steel pipes, the upright posts of the lantern frame (3) are made of phi 350x10mm steel pipes, the cross bars are made of I20a I-shaped steel, and the diagonal braces of the scissors are made of 16 channel steel; the transverse bridge length of the lantern frame (3) is 2.2m, the width along the bridge direction is 2.5m, the height of the front row of upright columns is 2.66m, the height of the rear row of upright columns is 2.33m, the distance between the two ends of the upright columns and the bottom and the top is 0.3m, the two ends of the upright columns are welded into a whole by I20I-shaped steel to form a lantern frame member, and each surface of the lantern frame (3) is welded by [16 channel steel; the bottom and the top of the lantern frame (3) are welded with steel plates with the thickness of 16mm and the sizes of 950x950mm and 600x600mm respectively, after the steel plates and the steel pipes are welded, 0.3mx0.3m triangular steel plates are adopted to weld the steel pipes and the steel plates, and each end is not less than 4; the steel plate at the top of the lantern frame (3) is provided with holes to form a flange steel plate, each steel plate is provided with at least 8 holes, each side of each steel plate is provided with 3 bolt holes, the distance between each bolt hole and the edge of the steel plate is 7cm, the distance between each bolt hole is 23cm, and the diameter of each bolt hole is 28 mm; 4 lantern frame bodies are constructed and processed for each No. 0 block, unloading blocks (5) are arranged at the tops of upright columns of the lantern frames, the unloading blocks (5) are made of phi 350x10mm steel pipes, the height is 0.25m, steel plates with the size of 600x600mm and the thickness of 16mm are welded at the bottoms and the tops of two ends of each unloading block (5), the steel plates and the steel plates are welded by 0.3mx0.3m triangular steel plates at the periphery after being welded, and each end is not less than 4; the bottom of the unloading block (5) is provided with steel plates to form flange steel plates, the hole of each steel plate is not less than 8 holes, each side of each steel plate is provided with 3 bolt holes, the distance between each bolt hole and the edge of each steel plate is 7cm, and the distance between each bolt hole and the edge of each steel plate is 23 cm.
7. The method for constructing the 0# block full-fabricated bracket according to claim 4, wherein the method for assembling and disassembling the fabricated bracket is as follows:
mounting of triangular bracket
Hoisting the triangular bracket (2) according to the designed position and elevation and fixing the triangular bracket in place;
installation of distributing beam
3I-beams are arranged at the top of the bracket in the horizontal direction 3m away from the pier body, another group of 3I-beams are arranged at the position 1.89m away from the outermost I-beam, and the distance between every two I-beams is 30 cm; the transverse bridge between each group of I-shaped steel is welded and connected into a whole by using a 1cm thick steel plate at each interval of 1m in the transverse bridge direction; the two sides of the distribution beam and the bracket beam are welded and limited by adopting a twisted steel bar;
mounting lantern rack and unloading block
Directly hoisting the processed lantern frames (3) at the tops of the installed distribution beams (4), wherein two lantern frames are respectively installed on the two longitudinal sides of each pier body, the distance from the transverse bridge of each lantern frame (3) to the nearest vertical column to the central line of the box girder is 0.85m, and the distance from the longitudinal nearest vertical column to the projection side line of the pier cap is 54 cm; the bottom of each lantern frame (3) and the distribution beam (4) are welded and limited by steel bars, two lantern frames (3) are temporarily welded and cross-braced by channel steel, the unloading blocks (5) are connected with the upright columns of the lantern frames (3) by bolts, and double nuts are sleeved on the bolts between each upright column and the unloading blocks (5) and the bolts are not less than 8;
installing the template
The continuous beam No. 0 block bottom die is installed by adopting a hanging basket bottom die, a hanging basket bottom die system is assembled on an unloading block (5), a hanging basket rear cross beam is directly arranged on a rear-row unloading block (5), a cross beam with the same height and strength as those of a hanging basket front cross beam is arranged in the front row of the unloading block (5), the hanging basket bottom system is supported, and a limiting notch is welded by using section steel; after the rear cross beam and the supporting cross beam of the hanging basket are installed, the rear cross beam is fixed on a bracket support at the bottom by adopting two steel wire ropes, then a bottom die longitudinal distribution beam and a front cross beam of the hanging basket are installed, the rear cross beam and the bottom die longitudinal distribution beam are connected by adopting bolts designed by the original hanging basket, and the front cross beam of the hanging basket is connected with the longitudinal distribution beam of the bottom die by bolts; after the bottom die longitudinal distribution beam is installed, paving the bottom die, paving a hanging basket bottom die on the top of the bottom die longitudinal distribution beam, and adjusting the hanging basket bottom die to be at a designed position;
when a No. 0 continuous beam block side die is installed, I-shaped steel is installed on the top surfaces of front and rear cross beams of the hanging basket, 2I-shaped steel bodies are arranged on each side, and profile steel is adopted among the I-shaped steel bodies, the rear cross beams and the front supporting cross beams for welding and limiting; the bottom of the side form scaffold is arranged on the top surface of the I-shaped steel, profile steel is used for welding and temporarily supporting the bottom plate and the side form bracket when the side form is arranged, after the templates on two sides are arranged, the two ends of the top are welded and connected into a whole by adopting the I-shaped steel, and finish-rolled deformed steel bars are adopted between the templates for counter-pulling;
fifthly, dismantling the assembled frame
a. And after the casting of the 0# block of the continuous beam and the tensioning and grouting are finished, the 0# block bearing system can be detached.
b. Before the bearing system is dismantled, firstly, anchoring the hanging basket bottom die system on a beam body bottom plate by using finish rolling deformed steel bars, wherein anchoring points are arranged on cross sections of hanging basket cross beams, 4 anchoring points are arranged on each cross section, the anchoring points of the bottom plate are arranged 40cm away from the inner side of a web plate, the anchoring points of a flange plate are arranged 40cm away from the position of the web plate, and the upper end and the lower end of each anchoring point are both anchored by adopting double nuts;
c. then cutting the limiting profile steel of the unloading block (5) by using a cutting gun, separating the unloading block (5) from the hanging basket bottom die system, and dismantling the unloading block (5);
d. after the unloading block (5) is detached, a 10T manual hoist is adopted to pull the lantern frame (3), before the lantern frame (3) is pulled, the temporary connection between the two lantern frames (3) on the same side needs to be removed, and then the hoist is pulled slowly to enable the lantern frame (3) to move slowly to one side on the distribution beam (4); when the front end of the lantern frame (3) is about to be separated from the distribution beam (4), the movement is stopped at the moment, the other 10T hoist is connected with the lantern frame (3) through a steel wire rope, hoist lifting points are arranged on the flange plates, the hoists start to be stressed, when the lantern frame (3) is pulled forwards at the moment, the other hoist is tensioned at the same time, the stress is kept, when the lantern frame (3) is separated from the distribution beam (4), the weight of the lantern frame (3) is completely born by the flange plate hoist at the moment, and then the lantern frame (3) is hung down by a crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010755070.3A CN111749142A (en) | 2020-07-31 | 2020-07-31 | 0# block assembled bracket design based on BIM and construction method thereof |
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|---|---|---|---|
| CN202010755070.3A CN111749142A (en) | 2020-07-31 | 2020-07-31 | 0# block assembled bracket design based on BIM and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853929A (en) * | 2021-01-15 | 2021-05-28 | 浙江交工集团股份有限公司 | Anti-tilting structure of high-altitude lower cross beam and construction method thereof |
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- 2020-07-31 CN CN202010755070.3A patent/CN111749142A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853929A (en) * | 2021-01-15 | 2021-05-28 | 浙江交工集团股份有限公司 | Anti-tilting structure of high-altitude lower cross beam and construction method thereof |
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