Method for setting dynamic beam field and realizing beam manufacturing and beam erecting by utilizing bridge location

Abstract

The invention relates to a method for setting a dynamic beam field by utilizing a bridge site and realizing beam manufacturing and beam erecting, which specifically comprises the following steps of: selecting a plurality of spans at one end or the middle position of a bridge as a precast beam field; constructing a precast beam field; pile foundations and pile straining beams of the bridge body are constructed within the whole project construction range; a beam manufacturing / storing pedestal is constructed on the pile straining beams in the precast beam yard, and pedestal expanded foundations at the two ends of the beam manufacturing / storing pedestal are located on the two spans of the pile straining beams; pier columns, cover beams and supports are constructed on the pile straining beams except the precast beam field within the project construction range; processing the precast beams on a beam manufacturing / storing pedestal in a precast beam yard, and transferring the precast beams from the beam manufacturing / storing pedestal to a constructed support and a beam transporting vehicle through a gantry crane to carry out beam erecting operation; performing staged dismantling on the precast beam field; and dismantling the gantry crane and recovering the construction site. The dynamic beam field is arranged through the bridge site to achieve beam manufacturing and beam erecting operation, cost is saved, extra size does not need to be occupied, segmented implementation can be achieved, the construction period is shortened, and efficiency is high.

Description

Technical Field

[0001] This invention relates to the technical field of bridge beam fabrication and erection, and in particular to a method for setting up a dynamic beam yard at the bridge site to realize beam fabrication and erection. Background Technology

[0002] While breakthroughs are constantly being made in bridge construction technologies, some problems still exist in the precast frame construction process.

[0003] Precast beams require the construction of a precast beam yard to complete the fabrication of the beams before they are transported to the supports. Currently, the conventional practice for site selection is to either construct a beam yard on newly added temporary land or to construct a beam yard using the roadbed section's right-of-way.

[0004] Bridge construction environments are complex, and the current precast beam fabrication and erection face the following specific problems:

[0005] In mountainous areas and other terrain-restricted areas, there is no space to build a beam fabrication yard; the cost of temporary land use is high and has a certain impact on the environment; the cost of foundation treatment for beam fabrication platforms is high when the geology is poor; the cost of building a new beam yard outside the route is high due to the high cost of transportation facilities; and the construction of ultra-long precast beam segments for bridges is carried out span by span, which cannot be implemented in sections and restricts the project schedule. Summary of the Invention

[0006] The present invention aims to address the shortcomings of the prior art by providing a method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection is as follows:

[0009] S1. Precast beam yard location:

[0010] The precast beam yard is located within the project construction area, at one end or in the middle of the bridge, selecting several spans as the precast beam yard;

[0011] S2, Precast Beam Yard Construction:

[0012] To meet construction requirements, the precast beam yard was hardened, water and electricity were installed, and the foundation and track of the gantry cranes were constructed. Two gantry cranes that meet the lifting requirements were installed in the precast beam yard.

[0013] S3. Foundation Construction:

[0014] The construction of the bridge's main structure, including pile foundations and pile-supported beams, is carried out within the entire project construction scope.

[0015] S4. Construction of beam fabrication / storage platform:

[0016] Construct beam fabrication / storage platforms on the pile-tied beams within the precast beam yard, with the enlarged foundations at both ends of the platforms resting on the two spans of pile-tied beams;

[0017] S5. Construction of piers, cap beams, and supports:

[0018] Construction of piers, cap beams and supports on pile beams outside the precast beam yard within the project construction area;

[0019] S6. Precast beam fabrication:

[0020] Precast beams are processed on the precast / storage beam platforms in the precast beam yard. First, the precast beams are transferred from the precast / storage beam platforms to the constructed supports by a gantry crane. Then, the beam transport vehicle is lifted to the precast beams that have been erected. Finally, the remaining precast beams are transferred to the beam transport vehicle by a gantry crane for beam erection.

[0021] S7. Phased dismantling of the precast beam yard:

[0022] Once all precast beams on bridge spans within the project construction area, except for the precast beam yard, have been erected, the beam fabrication / storage platforms in the precast beam yard will be dismantled in batches.

[0023] After dismantling a portion of the precast / storage beam platforms, piers, cap beams, and supports are constructed on the corresponding pile beams of the dismantled platforms. The remaining precast / storage beam platforms are then used to process precast beams. Through one or more cycles, all remaining precast beams are prefabricated before the final precast / storage beam platforms are dismantled and stored on the already erected precast beams. The remaining precast / storage beam platforms are then dismantled, and the remaining piers, cap beams, and supports are constructed. The stored precast beams are then erected on the remaining supports using a gantry crane, thus completing the erection of all precast beams.

[0024] S8. Equipment dismantling and site cleanup:

[0025] The gantry crane was dismantled, and the construction site was restored.

[0026] In step S1, when selecting a precast beam yard, the selection is made based on site conditions, construction period, and production requirements.

[0027] In step S2, the gantry crane is used to transfer materials, equipment and precast beams within the construction area, and to complete the bridge span erection operation within the gantry crane's operating range.

[0028] In step S2, the height of the gantry crane is sufficient to lift the precast beam from the beam fabrication / storage platform to the support and the beam transport vehicle.

[0029] In step S3, the pile system beam includes a pile cap.

[0030] In step S3, reinforcement bars for the pier columns are reserved after the pile foundation and pile system beams are constructed.

[0031] The beneficial effects of this invention are: this invention utilizes a dynamic beam yard set up at the bridge site to realize beam fabrication and beam erection operations, saving costs, requiring no additional volume, allowing for segmented implementation, saving construction time, and achieving high efficiency. Attached Figure Description

[0032] Figure 1 This is a plan view of the beam yard in a specific embodiment of the present invention;

[0033] Figure 2 The beam yard cross section in a specific embodiment of the present invention Figure 1 ;

[0034] Figure 3 The beam yard cross section in a specific embodiment of the present invention Figure 2 ;

[0035] Figure 4 A schematic diagram of pile foundation, pile-tied beam, beam fabrication / storage platform, and platform enlargement foundation;

[0036] Figure 5 A schematic diagram of prefabricated beams being fabricated / stored on a beam fabrication / storage platform;

[0037] Figure 6 A schematic diagram of pile foundations, pile-supported beams, piers, cap beams, and supports;

[0038] In the diagram: 1-Precast beam yard; 2-Gantry crane foundation and track; 3-Gantry crane; 4-Pile foundation; 5-Pile system beam; 6-Precast / storage platform; 7-Platform enlarged foundation; 8-Pier column; 9-Cap beam; 10-Support; 11-Precast beam; 12-Beam transport vehicle; 13-Bridge erecting machine;

[0039] The following will describe in detail, with reference to the accompanying drawings, embodiments of the present invention. Detailed Implementation

[0040] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0043] A method for setting up a dynamic beam yard at the bridge site to realize beam fabrication and erection, such as... Figures 1-6 As shown, specifically:

[0044] S1, Site selection of precast beam yard 1:

[0045] Precast beam yard 1 is selected within the project construction area, based on site conditions, construction period and production requirements. It is located at one end or in the middle of the bridge, and several spans are selected as precast beam yard 1.

[0046] Construction of S2, Precast Beam Yard 1:

[0047] To meet construction requirements, the site of precast beam yard 1 was hardened, water and electricity were provided, and the foundation and track 2 of the gantry crane were constructed. Two gantry cranes 3 that meet the lifting requirements were installed in precast beam yard 1.

[0048] The function of the gantry crane 3 is to transfer materials, equipment and precast beams 11 within the construction range, and to complete the bridge span beam erection operation within the operating range of the gantry crane 3; the height of the gantry crane 3 is sufficient to lift the precast beams 11 from the beam fabrication / storage platform 6 to the support 10 and the beam transport vehicle 12;

[0049] S3. Foundation Construction:

[0050] Within the entire project construction scope, the main body of the bridge is constructed, including the pile foundation 4 and the pile system beam 5. The pile system beam 5 includes the pile cap. After the construction of the pile foundation 4 and the pile system beam 5 is completed, the pier column reinforcement is reserved.

[0051] S4, Construction of Beam Fabrication / Storage Platform 6:

[0052] Construct a beam fabrication / storage platform 6 on the pile-tied beam 5 within the precast beam yard 1. The platform enlargement foundation 7 at both ends of the beam fabrication / storage platform 6 rests on the two spans of the pile-tied beam 5.

[0053] Construction of S5, pier 8, cap beam 9, and support 10:

[0054] Within the project construction area, excluding the precast beam yard 1, construct piers 8, cap beams 9, and supports 10 on pile beams 5.

[0055] S6, Precast Beam 11 Fabrication:

[0056] Precast beams 11 are processed on the precast / storage platform 6 in the precast beam yard 1. First, the precast beams 11 are transferred from the precast / storage platform 6 to the constructed support 10 by the gantry crane 3. Then, the beam transport vehicle 12 is lifted to the precast beams 11 that have been erected. Then, the remaining precast beams 11 are transferred to the beam transport vehicle 12 by the gantry crane 3 for beam erection.

[0057] S7, Precast Beam Yard Phase 1 Demolition:

[0058] After all the precast beams 11 on the bridge spans within the project construction area, except for the precast beam yard 1, have been erected, the beam fabrication / storage platform 6 in the precast beam yard 1 will be dismantled in batches.

[0059] After dismantling a portion of the precast / storage beam platform 6, the piers 8, cap beams 9, and supports 10 are constructed on the pile beams 5 corresponding to the dismantled precast / storage beam platform 6. The remaining precast / storage beam platforms 6 are used to process the precast beams 11. Through one or more cycles, before the final precast / storage beam platform 6 is dismantled, all the remaining precast beams 11 are precast and stored on the already erected precast beams 11. The remaining precast / storage beam platforms 6 are then dismantled, and the remaining piers 8, cap beams 9, and supports 10 are constructed. The stored precast beams 11 are then erected on the remaining supports 10 using a gantry crane 3, thus completing the erection of all precast beams 11.

[0060] S8. Equipment dismantling and site cleanup:

[0061] Dismantle gantry crane 3 and restore the construction site. Specific implementation examples:

[0063] like Figures 1-3 As shown, a certain super-large bridge has a total of 30 spans. The superstructure consists of 50m precast box girders, divided into left and right spans, with 3 girders per span and 6 girders per span.

[0064] Piers A through J were selected as precast beam yard 1. Precast beam 11 was erected span by span, starting from pier K and proceeding towards the main piers. The specific operation is as follows:

[0065] Construction of P1, pile foundation 4 and pile beam 5:

[0066] After the construction of bridge pile foundation 4 and pile beam 5 is completed, except for piers A-J, the construction of pier columns 8, cap beams 9, bearings 10 and other structures will continue at the other piers.

[0067] P2, Construction of Beam Foundation 6:

[0068] The pile-tied beam 5 of pier A-J has reserved reinforcement for the pier column, and the enlarged foundation 7 of the platform is constructed on the pile-tied beam 5.

[0069] To accommodate the construction space at both ends of precast beam 11, the first row of platforms is located between piers A and B; the second row is located between piers C and D; the third row is located between piers E and F; the fourth row is located between piers G and H; and the fifth row is located between piers I and J.

[0070] To accommodate the construction space on both sides, two beam fabrication / storage platforms are set up for each span, and four beam fabrication / storage platforms are set up for each span.

[0071] Construction of P3 and Gantry Crane 3:

[0072] Set up two gantry cranes 3, and select the appropriate model of gantry crane 3 according to the lifting weight and height;

[0073] The function of gantry crane 3 is to facilitate the transfer of materials and equipment and precast beams 11 in the beam yard, and to complete the bridge span beam erection within the foundation range of gantry crane 3;

[0074] The foundation under the track of gantry crane 3 is treated, and the foundation meets the load requirements;

[0075] The track range of gantry crane 3 is from pier A to pier N;

[0076] P4, spanning from pier K to pier N: beam erection

[0077] Beams are fabricated on the beam fabrication / storage platform 6. The prefabricated beams are then erected on the supports of piers K-L using the gantry crane 3. The beams are then erected one span at a time until all prefabricated beams 11 from span K to pier N are erected.

[0078] From piers P5 and N to subsequent bridge spans:

[0079] The beam transport vehicle 12 is lifted onto the precast beam 11 that has been erected;

[0080] Assemble bridge erecting machine 13;

[0081] The precast beams are transported to the beam transport vehicle 12 via the gantry crane 3. The beam transport vehicle 12 moves the precast beams 11 to the hoisting position of the bridge erecting machine 13, and the bridge erecting machine 13 erects the subsequent precast beams 11 one span at a time.

[0082] P6, Bridge span erection from pier G to pier K:

[0083] Dismantle beam transport vehicle 12 and bridge erecting machine 13;

[0084] Remove rows 4 and 5 of the platform and construct piers 8 from G to J, as well as cap beam 9 and support 10.

[0085] Beams are fabricated using the first to third rows of piers;

[0086] After the construction of pier columns 8, cap beams 9, and supports 10 from pier G to pier J is completed, the precast beams 11 between pier G and pier K are erected using gantry crane 3.

[0087] P7, Bridge span erection from pier A to pier G:

[0088] Pier A to Pier G comprise six spans, requiring a total of 36 beams;

[0089] Using the 1st to 3rd rows of piers, the beams are fabricated. After all the remaining precast beams 11 are precast, the precast beams 11 are transferred to the beams that have been erected on piers G to N by gantry crane 3.

[0090] Remove rows 1-3 of the platform and construct pier columns 8, cap beams 9, and supports 10 from piers A to F.

[0091] The precast beam 11 stored on the box girder of pier G-N is transferred to pier A-G using gantry crane 3;

[0092] P8, Bridge span erection from pier A to pier G:

[0093] Remove gantry crane 3 and restore the site.

[0094] In this invention, the beam fabrication / storage platform 6 utilizes the bridge pile foundation 4 as the platform foundation treatment, which can reduce the cost of platform foundation treatment; the beam fabrication / storage platform 6 is dismantled in stages, and the piers 8, cap beams 9, and supports 10 are constructed and the beams are erected. Before the last few beam fabrication / storage platforms 6 are dismantled, enough beams are prefabricated and placed on the bridge deck, and then the last beam fabrication / storage platform 6 is dismantled, and the piers 8, cap beams 9, and supports 10 are constructed. The beams on the bridge deck are then placed on the last supports 10.

[0095] This invention utilizes a dynamic beam yard at the bridge site to realize beam fabrication and erection operations, saving costs, requiring no additional volume, allowing for segmented implementation, saving construction time, and achieving high efficiency.

[0096] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A method for setting up a dynamic beam yard at a bridge site and realizing beam fabrication and erection, characterized in that, Specifically: S1, Site selection of precast beam yard (1): The precast beam yard (1) is located within the scope of the project construction, at one end or in the middle of the bridge, and several spans are selected as the precast beam yard (1); S2, Precast Beam Yard (1) Construction: To meet the construction requirements, the precast beam yard (1) was hardened and equipped with water and electricity facilities. The foundation and track (2) of the gantry crane were constructed. Two gantry cranes (3) that meet the lifting requirements were installed in the precast beam yard (1). S3. Foundation Construction: The construction of the main bridge structure includes pile foundations (4) and pile-tied beams (5) within the entire project construction area; S4, Construction of beam support (6): Construct a beam fabrication / storage platform (6) on the pile-tied beam (5) in the precast beam yard (1), and the platform enlargement foundation (7) at both ends of the beam fabrication / storage platform (6) sits on the two-span pile-tied beam (5); Construction of S5, pier (8), cap beam (9), and support (10): Construct piers (8), cap beams (9) and supports (10) on pile beams (5) outside the precast beam yard (1) within the project construction area; S6. Fabrication of precast beams (11): The precast beams (11) are processed on the beam fabrication / storage platform (6) in the precast beam yard (1). First, the precast beams (11) are transferred from the beam fabrication / storage platform (6) to the constructed support (10) by the gantry crane (3). Then, the beam transport vehicle (12) is lifted to the precast beams (11) that have been erected. Then, the remaining precast beams (11) are transferred to the beam transport vehicle (12) by the gantry crane (3) for beam erection. S7, Precast Beam Yard (1) - Phased Demolition: After all the precast beams (11) on the bridge spans outside the precast beam yard (1) within the project construction area have been erected, the beam fabrication / storage platforms (6) in the precast beam yard (1) will be dismantled in batches. After dismantling a portion of the beam fabrication / storage platform (6), continue to construct piers (8), cap beams (9), and supports (10) on the pile beams (5) corresponding to the dismantled beam fabrication / storage platform (6), and use the remaining beam fabrication / storage platform (6) to process precast beams (11). Through one or several cycles, before the final beam fabrication / storage platform (6) is dismantled, all remaining precast beams (11) are prefabricated and stored on the erected precast beams (11). Dismantle the remaining beam fabrication / storage platform (6), construct the remaining piers (8), cap beams (9), and supports (10), and erect the stored precast beams (11) on the remaining supports (10) using a gantry crane (3) to complete the erection of all precast beams (11). S8. Equipment dismantling and site cleanup: Dismantle the gantry crane (3) and restore the construction site.

2. The method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection according to claim 1, characterized in that, In step S1, when selecting the precast beam yard (1), the selection is made according to the site conditions, construction period and production requirements.

3. The method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection according to claim 2, characterized in that, In step S2, the gantry crane (3) is used to transfer materials, equipment and precast beams (11) within the construction area and to complete the bridge span beam erection operation within the operating range of the gantry crane (3).

4. The method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection according to claim 3, characterized in that, In step S2, the height of the gantry crane (3) is sufficient to lift the precast beam (11) from the beam fabrication / storage platform (6) to the support (10) and the beam transport vehicle (12).

5. The method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection according to claim 4, characterized in that, In step S3, the pile beam (5) includes a pile cap.

6. The method for setting up a dynamic beam yard at the bridge site and realizing beam fabrication and erection according to claim 5, characterized in that, In step S3, after the pile foundation (4) and pile system beam (5) are constructed, the pier column reinforcement is reserved.

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