CN106863587B - Multi-rib three-dimensional prestress prefabricated groove body steel bar installation rack and installation method - Google Patents
Multi-rib three-dimensional prestress prefabricated groove body steel bar installation rack and installation method Download PDFInfo
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- CN106863587B CN106863587B CN201710118946.1A CN201710118946A CN106863587B CN 106863587 B CN106863587 B CN 106863587B CN 201710118946 A CN201710118946 A CN 201710118946A CN 106863587 B CN106863587 B CN 106863587B
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- groove body
- steel bar
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- main beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/22—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members assembled from preformed parts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a multi-rib three-dimensional prestress prefabricated groove body steel bar installation rack, wherein main beam groove bodies are positioned on two sides, a plurality of secondary beam rack holes perpendicular to the main beam groove bodies are arranged between the main beam groove bodies, and secondary beam installation area racks are formed among the secondary beam rack holes; the depth of the two ends of the main beam groove body is larger than the depth of the middle of the main beam groove body, end reinforcing steel bar grooves are further arranged at the two ends of the main beam groove body, and the depth of the end reinforcing steel bar grooves is larger than the depth of the secondary beam rack holes. The primary and secondary beams are installed in sequence of secondary beams, main beams, side walls, bottom plates and overall transfer. The installation method provided by the invention is matched with a specially-made steel bar installation rack, so that the construction efficiency of the multi-rib three-dimensional prestress prefabricated groove body is greatly improved, and the project progress is accelerated. By adopting the device and the method, the installation of a large number of special-shaped structural steel bars of a single groove body main beam and a single secondary beam can be quickly and efficiently completed within 96 hours, the next working procedure operation condition is met, and the construction time of the groove body is greatly shortened.
Description
Technical Field
The invention relates to the technical field of multi-rib prestressed aqueduct construction, in particular to a multi-rib three-dimensional prestressed prefabricated groove body steel bar installation rack and an installation method.
Background
In recent years, with the rapid development of hoisting technology, engineering hoisting equipment with ultra-large tonnage is widely applied to large-scale water conservancy aqueduct engineering construction, so that a new development direction is derived from the aqueduct construction technology, and an industrial standardized prefabricated aqueduct process is developed to a certain extent. Because the linear hydraulic engineering is greatly influenced by the prefabrication speed of aqueduct prefabricated parts in the progress, the process of binding the reinforcing steel bars on the bin site by the conventional method directly arranges the process of binding the reinforcing steel bars of the tank body on a key construction line of the engineering, and the multi-rib structural template is complex and difficult to install, and if the multi-rib structural template and the reinforcing steel bar installation process are alternately constructed, construction interference is inevitably generated between the multi-rib structural template and the reinforcing steel bar installation process, so that the construction progress of the tank body is greatly influenced. Therefore, the new device is researched, the installation method is innovated, the steel bars of the prefabricated groove body are adjusted to be constructed synchronously with the groove body template or the installation of the steel bars of the groove body is completed in advance, and the method that the steel bars of the groove body can be hoisted into the mold immediately after the template is in place is favorable for accelerating the project progress.
For example, a certain hydraulic engineering adopts a groove body prefabricating construction process, and the cross section size of a single groove is as follows: the inner contour is 6.5m multiplied by 5.0m (clear width multiplied by clear height), the outer contour is 8.7m multiplied by 7.1-6.6 m, the bottom plate is 0.4m thick, the side wall is 0.5m thick, and the empty slot weight is about 1200 t. The aqueduct adopts a rectangular prefabricated aqueduct with a multi-rib structure, 15 secondary beams are respectively arranged below a bottom plate, reinforcing steel bars of the secondary beams are arranged to be deep into a main beam by 1m, the main beam is distributed at the left side and the right side of a aqueduct body, the width of the main beam is 1.2m, the height of the main beam is 2.1m, and 13 auxiliary beams are arranged on the outer vertical surface of the side wall of the aqueduct bodyThe side ribs are provided with prestressed anchor bundles in the transverse direction, the longitudinal direction and the vertical direction, and the longitudinal and transverse prestressing force adopts f ptk Steel strand of 1860kPa grade, the vertical prestress is P SB The 1080. phi. PS32 finish-rolled thread prestressed steel bar has dense and staggered structural steel bars and prestressed steel bars, high installation precision requirement of the prestressed steel bars and common steel bars and high positioning difficulty.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-rib three-dimensional prestressed prefabricated groove body steel bar installation rack and an installation method, which can facilitate the manufacturing of the steel bar installation rack, improve the structural stability of the groove body steel bars, improve the dimensional accuracy of the groove body steel bars, facilitate the rapid hoisting and installation of the groove body steel bars and improve the construction efficiency of the multi-rib prestressed groove body.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a multi-rib three-way prestress prefabricated groove body steel bar installation rack is characterized in that main beam groove bodies are positioned on two sides, a plurality of secondary beam rack holes perpendicular to the main beam groove bodies are formed between the main beam groove bodies, and secondary beam installation area racks are formed among the secondary beam rack holes;
the depth of the two ends of the main beam groove body is larger than the depth of the middle of the main beam groove body, end reinforcing steel bar grooves are further arranged at the two ends of the main beam groove body, and the depth of the end reinforcing steel bar grooves is larger than the depth of the secondary beam rack holes.
Preferably, the width of the end reinforcing groove is greater than the width of the secondary girder frame hole.
In the preferred scheme, the main beam groove body, the secondary beam rack holes and the end reinforcing steel bar grooves are all positioned below the ground.
In the preferred scheme, the bottoms of the two ends of the main beam groove body are provided with water collecting pits.
In the preferred scheme, the top of the secondary beam mounting area rack is provided with a horizontal elevation control support arranged horizontally, the bottom of the main beam groove body is provided with a longitudinal elevation control support arranged horizontally, and the position of the main beam groove body close to the outer side wall is provided with a side wall steel bar fixing support arranged vertically.
In the preferred scheme, the number of the side wall steel bar fixing supports in each main beam groove body is two.
In the preferred scheme, brick layers are arranged on the side walls of the secondary beam rack holes and the end reinforcing steel bar grooves, and mortar plastering layers are arranged on the surfaces of the brick layers;
concrete layers are arranged at the bottoms of the main beam groove body, the secondary beam rack holes and the end reinforcing steel bar grooves;
and a concrete layer is arranged at the top of the secondary beam mounting area rack.
The installation method of the multi-rib three-dimensional prestress prefabricated groove body steel bar installation rack comprises the following steps:
firstly, excavating a main beam groove body, a secondary beam rack hole and an end reinforcing steel bar groove according to design requirements;
hardening and leveling a foundation surface layer of the steel bar installation rack, wherein a horizontal plane adopts concrete, a vertical plane adopts a brick structure, and the surface of the brick structure is coated with mortar;
thirdly, mounting a transverse elevation control support at the part of the secondary beam mounting area rack corresponding to each secondary beam for positioning the reinforcing steel bars of the bottom plate, longitudinally arranging a longitudinal elevation control support at the bottom of the main beam groove body along the longitudinal direction, and adopting steel pipes for the transverse elevation control support and the longitudinal elevation control support;
fourthly, arranging a side wall steel bar fixing support in the main beam groove body along the outer side wall of the main beam groove body, wherein the side wall steel bar fixing support is connected with a fastener by adopting a steel pipe;
fifthly, assembling secondary beam reinforcing steel bars, and hoisting the assembled secondary beam reinforcing steel bars into the secondary beam rack holes and the end reinforcing steel bar grooves;
sixthly, assembling main beam steel bars; firstly, mounting bottom pressure-bearing steel bars and stressed main steel bars, then mounting side wall vertical steel bars and stirrups, and finally connecting and fixing joints of the secondary beam main steel bars and the main beam steel bars by spot welding;
assembling side wall side rib steel bars, wherein the installation sequence is that vertical main bars are firstly installed, then horizontal distribution bars are installed, and finally stirrups are installed;
the installation of the multi-rib three-way prestress prefabricated groove body steel bars is realized through the steps.
In the preferred scheme, still including the transportation step, adopt the inside mode of propping tightly of outside locking with the cell body reinforcing bar temporarily fixed, the cell body reinforcing bar integral hoisting who will fix goes into the storehouse face.
In the preferred scheme, the fixing method is that after the outside of the steel bar of the groove body is bound by a steel wire rope, the steel bar is fixed by a lock catch;
inside steel pipe fastener alternately forms inside vaulting pole of side wall reinforcing bar to guarantee that the cell body reinforcing bar can have sufficient rigidity in integral hoisting process.
According to the multi-rib three-dimensional prestress prefabricated groove body steel bar mounting rack and the mounting method, the mounting accuracy of the groove body steel bar can be improved and the mounting efficiency of the groove body steel bar can be improved through the researched and developed special steel bar mounting rack. The steel bar mounting rack is convenient to machine and manufacture, high in structural stability, convenient to construct and operate, low in requirements on a lifting appliance and a site, and easy to realize quick and efficient mounting of the steel bars of the aqueduct of the hydraulic engineering and quick prefabricating construction of the aqueduct body in a field complex environment. The installation method provided by the invention is matched with a specially-made steel bar installation rack, so that the construction efficiency of the multi-rib three-dimensional prestress prefabricated groove body is greatly improved, and the project progress is accelerated. By adopting the device and the method, the installation of a large number of special-shaped structural steel bars of a single groove body main beam and a single secondary beam can be quickly and efficiently completed within 96 hours, the next working procedure operation condition is met, and the construction time of the groove body is greatly shortened.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic top view of the present invention.
FIG. 2 is a schematic sectional view A-A of FIG. 1.
Fig. 3 is a schematic cross-sectional view of fig. 1 taken along line D-D.
FIG. 4 is a schematic sectional view B-B of FIG. 1.
FIG. 5 is a schematic cross-sectional view of C-C of FIG. 1.
Fig. 6 is a schematic cross-sectional view of a secondary beam stand hole of the present invention.
In the figure: the main beam groove body 1, the secondary beam installing area rack 2, the transverse elevation control support 3, the longitudinal elevation control support 4, the side wall steel bar fixing support 5, the secondary beam rack hole 6, the structure side line 7, the water collecting pit 8, the end part steel bar groove 9, the concrete layer 10, the ground 11, the brick layer 12 and the mortar plastering layer 13.
Detailed Description
Example 1:
as shown in fig. 1-5, a multi-rib three-way prestressed precast groove body steel bar installation rack, main beam groove bodies 1 are positioned at two sides, a plurality of secondary beam rack holes 6 perpendicular to the main beam groove bodies 1 are arranged between the main beam groove bodies 1, and secondary beam installation area racks 2 are formed between the secondary beam rack holes 6;
the depth of the two ends of the main beam groove body 1 is larger than that of the middle of the main beam groove body, end reinforcing steel bar grooves 9 are further arranged at the two ends of the main beam groove body 1, the end reinforcing steel bar grooves 9 are parallel to the secondary beam rack holes 6, and the depth of the end reinforcing steel bar grooves 9 is larger than that of the secondary beam rack holes 6. In the preferred scheme, the main beam groove body 1, the secondary beam rack holes 6 and the end reinforcing steel bar grooves 9 are all positioned below the ground 11. From this structure, be convenient for provide reliable support to girder reinforcing bar, secondary beam reinforcing bar and side wall side rib reinforcing bar, ensure the dimensional accuracy of cell body reinforcing bar. The secondary beam mounting area rack 2 is convenient for the assembly operation of the secondary beam reinforcing steel bars. Each groove body and each hole position are arranged below the ground, so that the construction amount is reduced, the construction materials are saved, and the hoisting at the later stage is facilitated. The secondary beam reinforcing steel bars can be firstly bound on the ground and then integrally hung into the secondary beam rack holes 6;
preferably, as shown in fig. 2, the width of the end reinforcing groove 9 is greater than the width of the sub-girder frame hole 6. Therefore, the structure is beneficial to improving the strength of the end part of the groove body.
In a preferred scheme, as shown in fig. 1, water collecting pits 8 are arranged at the bottoms of two ends of a main beam groove body 1. The sump clearance size in this example is 50cm x 50 cm. Avoid ponding to influence the construction.
In the preferred scheme as shown in fig. 2 and 5, a horizontal elevation control support 3 arranged horizontally is arranged at the top of a secondary beam mounting area rack 2, a longitudinal elevation control support 4 arranged horizontally is arranged at the bottom of a main beam groove body 1, and a side wall steel bar fixing support 5 arranged vertically is arranged at a position, close to the outer side wall, of the main beam groove body 1. Therefore, the structure is beneficial to improving the precision of the steel bar of the groove body.
In a preferred scheme, as shown in fig. 5, two rows of side wall steel bar fixing brackets 5 are arranged in each main beam groove body 1.
In the preferred scheme, brick layers 12 are arranged on the side walls of the secondary beam rack holes 6 and the end reinforcing steel bar grooves 9, and mortar surface layers 13 are arranged on the surfaces of the brick layers 12; and a brick structure is adopted, so that the installation accuracy of the secondary beam steel bars and the end part steel bars can be accurately controlled.
The bottoms of the main beam groove body 1, the secondary beam rack holes 6 and the end reinforcing steel bar grooves 9 are provided with concrete layers 10;
and a concrete layer 10 is arranged at the top of the secondary beam mounting area rack 2. The concrete layer 10 is arranged to facilitate surface hardening and leveling of the steel bar installation rack.
Example 2:
on the basis of embodiment 1, as shown in fig. 1 to 6, an installation method of the multi-rib three-way prestressed prefabricated channel steel bar installation rack includes the following steps:
firstly, designing the detailed size of a special rack for installing the multi-rib steel bars of the large-span groove body according to the structural size of the large-span multi-rib prefabricated groove body, and excavating a main beam groove body 1, a secondary beam rack hole 6 and an end steel bar groove 9 according to design requirements; accurately lofting by using a measuring instrument before excavation;
preferably, the main beam groove body 1 is excavated mechanically, and the secondary beam mounting area rack 2 is excavated manually.
Hardening and leveling a foundation surface layer of the steel bar installation rack, wherein a horizontal plane adopts concrete, a vertical plane adopts a brick structure, and the surface of the brick structure is coated with mortar;
mounting two transverse elevation control brackets 3 at the positions of the secondary beam mounting area rack 2 corresponding to each secondary beam for positioning the reinforcing steel bars of the bottom plate, longitudinally arranging three rows of longitudinal elevation control brackets 4 at the bottom of the main beam groove body 1, and adopting steel pipes for the transverse elevation control brackets 3 and the longitudinal elevation control brackets 4;
fourthly, the support frames are arranged along two sides of the main beam, two rows of side wall steel bar fixing supports 5 are arranged in the main beam groove body 1 along the outer side wall of the main beam groove body 1, the side wall steel bar fixing supports 5 are connected through steel pipes and fasteners, and therefore the installation accuracy and the anti-deformation capacity of the side wall steel bars are improved;
fifthly, assembling secondary beam steel bars, wherein the secondary beam steel bars are sequentially arranged as bottom-layer steel bars, stirrups, side-face steel bars and top-face steel bars, and finally binding the stirrups; after the secondary beam reinforcing steel bars are assembled and inspected to be qualified, the secondary beam reinforcing steel bars are hoisted into the secondary beam rack holes 6 and the end reinforcing steel bar grooves 9 in time;
sixthly, assembling main beam steel bars; firstly, mounting bottom pressure-bearing steel bars and stressed main steel bars, then mounting side wall vertical steel bars and stirrups, and finally connecting and fixing joints of the secondary beam main steel bars and the main beam steel bars by spot welding;
assembling side wall side rib steel bars, wherein the installation sequence is that vertical main bars are firstly installed, then horizontal distribution bars are installed, and finally stirrups are installed;
the installation of the multi-rib three-way prestress prefabricated groove body steel bars is realized through the steps.
In the preferred scheme, the method also comprises a transferring step, wherein the groove body steel bars are temporarily fixed in an external locking and internal tightening mode, so that preparation is made for integral transferring and hoisting of the groove body steel bars, and then the fixed groove body steel bars are integrally hoisted to the warehousing surface.
In a further preferred scheme, the fixing method is that after the outside of the steel bar of the groove body is bound by a steel wire rope, the steel bar is fixed by a lock catch; inside steel pipe fastener alternately forms inside vaulting pole of side wall reinforcing bar to guarantee that the cell body reinforcing bar can have sufficient rigidity in integral hoisting process.
The reinforcing bar installation rack adopts the concrete sclerosis, and secondary beam rack hole 6 should adopt the brick structure to accurate control secondary beam reinforcing bar installation precision, and adopt the precision instrument to measure after the rack civil engineering project is accomplished, use steel pipe and steel sheet welding to form high accuracy girder, tank bottom reinforcing bar positioning control frame, guarantee that the reinforcing bar location is accurate, the interval satisfies the standard requirement.
According to the invention, the high-efficiency installation of the multi-rib three-dimensional prestressed prefabricated groove body main and secondary beam steel bars is realized through the steps, the installation of a large number of special-shaped structural steel bars of a single groove body main beam and a single secondary beam can be quickly and efficiently completed within 96 hours, the next process operation condition is provided, and the groove body construction time is greatly shortened.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the technical features described in the present invention can be used in combination with each other without conflict, and the scope of the present invention should be defined by the technical means described in the claims, and equivalents thereof including the technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (7)
1. A mounting method adopting a multi-rib three-dimensional prestress prefabricated groove body steel bar mounting rack is characterized in that main beam groove bodies (1) are positioned on two sides, a plurality of secondary beam rack holes (6) vertical to the main beam groove bodies (1) are formed between the main beam groove bodies (1), and secondary beam mounting area racks (2) are formed between the secondary beam rack holes (6); the depth of the two ends of the main beam groove body (1) is greater than that of the middle of the main beam groove body, end reinforcing steel bar grooves (9) are arranged at the two ends close to the main beam groove body (1), and the depth of the end reinforcing steel bar grooves (9) is greater than that of the secondary beam rack holes (6);
the method is characterized by comprising the following steps:
firstly, excavating a main beam groove body (1), a secondary beam rack hole (6) and an end reinforcing steel bar groove (9) according to design requirements;
the main beam groove body (1), the secondary beam rack hole (6) and the end reinforcing steel bar groove (9) are all positioned below the ground (11);
the bottoms of the two ends of the main beam groove body (1) are provided with water collecting pits (8);
hardening and leveling a foundation surface layer of the steel bar installation rack, wherein a horizontal plane adopts concrete, a vertical plane adopts a brick structure, and the surface of the brick structure is coated with mortar;
thirdly, mounting a transverse elevation control support (3) at the position, corresponding to each secondary beam, of the secondary beam mounting area rack (2) for positioning the bottom plate steel bars, longitudinally arranging a longitudinal elevation control support (4) at the bottom of the main beam groove body (1), and adopting steel pipes for the transverse elevation control support (3) and the longitudinal elevation control support (4);
fourthly, arranging a side wall steel bar fixing support (5) in the main beam groove body (1) along the outer side wall of the main beam groove body (1), wherein the side wall steel bar fixing support (5) is connected by adopting a steel pipe and a fastener;
fifthly, assembling secondary beam reinforcing steel bars, and hoisting the assembled secondary beam reinforcing steel bars into the secondary beam rack holes (6) and the end reinforcing steel bar grooves (9);
sixthly, assembling main beam steel bars; firstly, mounting bottom pressure-bearing steel bars and stressed main steel bars, then mounting side wall vertical steel bars and stirrups, and finally connecting and fixing joints of the secondary beam main steel bars and the main beam steel bars by spot welding;
assembling side wall side rib steel bars, wherein the installation sequence is that vertical main bars are firstly installed, then horizontal distribution bars are installed, and finally stirrups are installed;
the installation of the multi-rib three-way prestress prefabricated groove body steel bars is realized through the steps.
2. The method for installing the steel bar installation rack of the multi-rib three-way prestress prefabricated groove body according to claim 1, which is characterized in that: the width of the end reinforcing steel bar groove (9) is larger than that of the secondary beam rack hole (6).
3. The method for installing the steel bar installation rack of the multi-rib three-way prestress prefabricated groove body according to claim 1, which is characterized in that: the top of the secondary beam mounting area rack (2) is provided with a horizontal height control support (3) which is horizontally arranged, the bottom of the main beam groove body (1) is provided with a longitudinal height control support (4) which is horizontally arranged, and a vertically arranged side wall steel bar fixing support (5) is arranged at a position, close to the outer side wall, of the main beam groove body (1).
4. The method for installing the steel bar installation rack of the multi-rib three-way prestressed precast channel body according to claim 3, wherein: the side wall steel bar fixing supports (5) in each main beam groove body (1) are two rows.
5. The method for installing the steel bar installation rack of the multi-rib three-way prestress prefabricated groove body according to claim 1, which is characterized in that: the side walls of the secondary beam rack hole (6) and the end reinforcing steel bar groove (9) are provided with brick layers (12), and the surfaces of the brick layers (12) are provided with mortar plastering layers (13);
a concrete layer (10) is arranged at the bottoms of the main beam groove body (1), the secondary beam rack hole (6) and the end reinforcing steel bar groove (9);
and a concrete layer (10) is arranged at the top of the secondary beam mounting area rack (2).
6. The method for installing the steel bar installation rack of the multi-rib three-way prestress prefabricated groove body according to claim 1, which is characterized in that: still including the transportation step, adopt the inside mode of propping tightly of outside locking with the cell body reinforcing bar temporarily fixed, the cell body reinforcing bar integral hoisting income storehouse face that will fix.
7. The method for installing the steel bar installation rack of the multi-rib three-way prestressed precast channel body according to claim 6, wherein: the fixing method is that after the outside of the steel bar of the groove body is bound by a steel wire rope, the steel bar is fixed by a lock catch;
inside steel pipe fastener alternately forms inside vaulting pole of side wall reinforcing bar to guarantee that the cell body reinforcing bar can have sufficient rigidity in integral hoisting process.
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| CN201710118946.1A CN106863587B (en) | 2017-03-02 | 2017-03-02 | Multi-rib three-dimensional prestress prefabricated groove body steel bar installation rack and installation method |
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2017
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| CN204076497U (en) * | 2014-07-28 | 2015-01-07 | 中国建筑第六工程局有限公司 | A kind of prefabricated case beam reinforcing bar binding location moulding bed |
| CN205766794U (en) * | 2016-06-29 | 2016-12-07 | 中交一公局第三工程有限公司 | A kind of end, web reinforcement overall binding moulding bed |
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