CN113250228B - Construction method of embedded foundation fixing device of multi-story building steel reinforced concrete core tube structure - Google Patents
Construction method of embedded foundation fixing device of multi-story building steel reinforced concrete core tube structure Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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Abstract
The invention discloses a construction method of a multi-layer building steel reinforced concrete core tube structure embedded foundation fixing device, which comprises the steps of excavating earth to form, pouring a cushion layer and paving a waterproof coiled material; manufacturing a reinforcement cage on site; hoisting and accurately positioning the reinforcement cage; pouring slope bottom concrete; hoisting the steel skeleton column; grouting column feet; binding steel rib columns and bearing platform steel bars; pre-burying a cable rope embedded part, pouring a raft cushion layer and then installing a cable rope; hoisting the section steel beam after correcting the position of the steel skeleton column; binding raft reinforcing steel bars (welding the reinforcing steel bars at the bottom layer of the raft with steel columns), pouring concrete in the bearing platform to the bottom of the raft after acceptance inspection; detaching the cable wind ropes and pouring raft plate concrete; erecting a frame body, paving a steel rib column and a section steel beam template and binding steel bars; and (6) pouring concrete. The invention can effectively increase the vertical bearing capacity of the core barrel, improve the safety and reliability of a structural system, increase the pulling resistance, reduce the displacement, increase the integral rigidity of the structure, have higher stability and effectively reduce the construction difficulty.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a multi-layer building steel reinforced concrete core tube structure embedded foundation fixing device.
Background
The steel reinforced concrete core tube structure has the advantages of high strength, high rigidity, good ductility, strong earthquake resistance and good fireproof and corrosion resistance, and is widely applied to high-rise buildings, large-span space structures, building structures in earthquake-resistant defense areas and the like. The column base in the steel reinforced concrete core tube structure is used as an important node for connecting the upper main body structure and the lower foundation, plays an important role in performance of force transfer, stability and the like of the whole structure, and can be divided into a non-embedded foundation and an embedded foundation according to different column base burial depths. When the high-rise building adopts the structure form, the foundation burial depth can generally reach two or more layers, so that a non-embedded foundation is usually adopted; the minimum embedding depth of the embedded foundation column base can meet the condition that the ultimate bearing capacity of the column base node is larger than that of a steel column member, when the structure is used in a multi-layer building with a basement layer below the ground and a large-span steel structure above the ground, the foundation embedding depth cannot meet the design requirement, in order to increase the foundation embedding depth, the column base node is embedded to the position below the basement bottom plate, and the ultimate bearing capacity of the column base is larger along with the increase of the embedding depth within a certain range.
The steel rib concrete core tube structure has the advantages of complex structural form, huge structural system, various and complex connecting nodes such as the steel rib structure and the steel rib structure, the steel rib structure and the steel structure, the steel rib structure and the reinforced concrete structure and the like, complex construction process and multiple-species cross operation, greatly increases safety risk and improves construction difficulty; the space in the core cylinder is narrow and small, the working face cannot be effectively pulled open in the construction process, multiple-work-type centralized operation is caused, the work is lost, the construction efficiency is reduced, and the construction period is prolonged. The embedded foundation has more construction processes, the connection among the processes is tight, the requirements on the construction precision and the quality of each structure are higher, however, no scientific method is provided for standardizing the construction process at present, and no standard operation flow is formed.
Disclosure of Invention
Based on the defects of the prior art, the technical problem to be solved by the invention is to provide the construction method of the embedded foundation fixing device of the core tube structure of the multi-layer building steel reinforced concrete, which is used for reasonably and effectively treating the node parts, scientifically and reasonably arranging the construction procedures, effectively reducing the construction difficulty, reducing the cross operation, reducing the labor, reasonably compressing the construction period, reducing the safety risk and improving the safety and the reliability of the structural system.
In order to achieve the purpose, the invention adopts the following technical measures:
a construction method of a multi-story building steel reinforced concrete core tube structure embedded foundation fixing device comprises the following steps:
step 1, excavating earth to a designed elevation to form a bearing platform, excavating vertically around the bearing platform, and excavating a 45-degree slope of a part, at which a reinforcement cage is placed, at the bottom of the slope; cleaning an inner base layer of the bearing platform, pouring cushion layer concrete with the thickness of 100mm, fully paving the waterproof coiled material by adopting a pre-paving and reverse-sticking method, ensuring that the lap joint width is not less than 100mm when the waterproof coiled material is paved, and ensuring that the waterproof layer forms an integral waterproof system;
connecting the embedded part with the steel frame through four horizontal turn-buckle bolts, wherein two ends of each horizontal turn-buckle bolt are respectively welded on four vertical prisms of the steel frame and the embedded part, so that the four horizontal turn-buckle bolts are ensured to be positioned on the same horizontal plane, and the steel frame and the embedded part are relatively fixed after welding is finished;
the reinforcement cage reinforcement comprises gluten and reinforcement at the bottom of the bearing platform, the gluten is arranged at the upper part of the steel frame, the gluten is bound and connected, and the gluten is welded with angle steel at the upper part of the steel frame;
step 5, hoisting the steel rib column after the slope bottom concrete reaches the designed strength, connecting the steel rib column with the embedded part through 4 anchor bolts, and fastening the anchor bolts by adopting two nuts and gaskets;
step 6, adopting a pressure grouting method to perform column base grouting in order to ensure the compactness of concrete at the column base part of the steel rib column;
step 7, embedding foundation bolts before pouring a raft cushion layer, and welding steel plates with holes of 40mm in the middle on the four vertical surfaces of each steel reinforced column and 3 meters below the column top; after the raft cushion layer is poured, installing a cable rope, wherein one end of the cable rope is fixed on a steel plate of the steel skeleton column, and the other end of the cable rope is connected with a pre-embedded foundation bolt through a manual hoist;
Preferably, in step 2, the inclined portions at two ends of the reinforcement at the bottom of the bearing platform are inclined at an angle equal to the side surface inclination angle of the slope bottom of the bearing platform, and the angle is 45 degrees with the horizontal plane; the horizontal part of the steel bar at the bottom of the bearing platform is arranged on the angle steel at the bottom of the steel frame and penetrates through the embedded part and the steel frame; the horizontal part and the steelframe welded connection of cushion cap bottom reinforcing bar, its slope part stretch out the surface of gluten and with gluten binding connection.
Further, in the step 3, if the height of the steel reinforcement cage exceeds the designed elevation, a wrench is used for clockwise screwing the vertical turn buckle to lower the steel reinforcement cage, and if the height of the steel reinforcement cage is lower than the designed elevation, the wrench is used for anticlockwise screwing the vertical turn buckle to raise the steel reinforcement cage; if the embedded part is deviated to the left, the wrench is used for screwing the two horizontal turn-buckle bolts on the left side anticlockwise, and simultaneously screwing the two horizontal turn-buckle bolts on the right side clockwise; if the embedded part is inclined to the right, clockwise screwing the two horizontal turn-buckle bolts on the left side by using a wrench, and simultaneously anticlockwise screwing the two horizontal turn-buckle bolts on the right side; if the embedded part is inclined to the front, the front two horizontal turn-buckle bolts are screwed anticlockwise by a wrench, and the rear two horizontal turn-buckle bolts are screwed clockwise simultaneously; if the embedded part is inclined backwards, clockwise screwing the two rear horizontal turn-buckle bolts and anticlockwise screwing the two front horizontal turn-buckle bolts by using a spanner; and when the positioning is finished, the relative fixation of the embedded part and the steel frame is ensured.
Preferably, in step 6, C40 non-shrinkage fine aggregate concrete is selected as column base grouting slurry of the steel reinforced column, the grouting slurry is prepared and stirred according to the preparation proportion strictly in the product specification, mechanical stirring is preferably adopted, a pressure grouting machine is used for grouting after uniform stirring, tight sealing between the template and the foundation and between the templates is ensured, and the gaps need to be sealed by adhesive tapes.
Preferably, in step 7, the hook of the manual hoist hooks one hole of the pull plate, the other hole of the pull plate penetrates through the anchor bolt, and finally the nut is installed on the anchor bolt for fixing.
Further, in step 8, the steel skeleton column and the section steel beam are connected through a connecting plate, 12 reserved holes which are uniformly distributed are formed in the steel skeleton column and the section steel beam respectively and used for bolt connection, and after the connecting plate is connected, welding processing is performed on the joint position of the steel skeleton column and the section steel beam.
The technical key points of the construction method of the embedded foundation fixing device of the multi-story building steel reinforced concrete core tube structure are as follows: pouring a cushion layer and paving and pasting a waterproof coiled material after earthwork excavation molding → manufacturing a reinforcement cage on site → hoisting the reinforcement cage and accurately positioning → pouring slope bottom concrete → hoisting a steel rib column → column foot grouting → binding the steel rib column and a bearing platform steel bar → embedding a cable rope embedded part, installing a cable rope after pouring a raft cushion layer → correcting the position of the steel rib column and then hoisting steel beams → binding the raft plate steel bar (welding the raft bottom steel bar and the steel rib column) and pouring concrete in the bearing platform to the bottom of the raft after checking and accepting the concrete, unloading the cable rope and pouring raft plate concrete → erecting a frame body, and paving and binding the steel rib column and the steel beam template → concrete pouring.
Therefore, the construction method of the embedded foundation fixing device of the multi-layer building steel reinforced concrete core tube structure can effectively increase the vertical bearing capacity of the core tube, improve the safety and reliability of a structural system, increase the pulling resistance, reduce the displacement, increase the integral rigidity of the structure, and have higher stability and efficiency; the embedded foundation column base joint structure meets the process and technical requirements of embedded foundation column base joints, slope bottom steel bars and embedded parts are manufactured into finished steel reinforcement cages on site through customizing steel frames and turn buckle bolts on site, construction difficulty can be reduced by the steel reinforcement cages, and meanwhile the requirements of accurate positioning of the embedded parts and the like are met. The construction method of the embedded foundation fixing device of the multi-storey building steel reinforced concrete core tube structure carries out reasonable and effective treatment on the node part, scientifically and reasonably arranges construction procedures, can effectively reduce construction difficulty, reduces cross operation, reduces labor, reasonably compresses construction period, reduces safety risk and improves engineering quality.
Drawings
FIG. 1 is a schematic view of an embedment;
FIG. 2 is a schematic view of a vertical turn buckle;
FIG. 3 is a schematic view of a horizontal turn buckle;
FIG. 4 is a schematic view of the connection between a steel frame and an embedded part;
FIG. 5 is a schematic view of a completed reinforcement cage;
FIG. 6 is a schematic diagram of cushion concrete pouring and waterproof roll paving after the pile cap is excavated;
FIG. 7 is a schematic view of a reinforcement cage height adjustment after hoisting of the reinforcement cage is completed;
FIG. 8 is a schematic diagram of the accurate adjustment of an embedment;
FIG. 9 is a schematic view of the completion of the placement of concrete on the bottom of the slope;
FIG. 10 is a schematic view of the steel skeleton column hoisting;
FIG. 11 is a schematic view of the completion of the hoisting of the steel reinforced column and the grouting of the column base;
FIG. 12 is a schematic view of the completion of the installation of the hawser;
FIG. 13 is a schematic view of the completion of the hoisting of the section steel beam;
fig. 14 is a schematic view of completion of raft plate rebar tying;
fig. 15 is a schematic view of completion of raft concrete pouring and removal of the guy rope;
FIG. 16 is a schematic view of a stiffened structural template and bracket installation;
fig. 17-1 to 17-3 are schematic views illustrating a process of laying section steel beams and floor deck formworks.
In the figure: 1-steel frame; 2-embedded parts; 3-reinforcing steel bars of a reinforcement cage; 4-vertical turn buckle; 5-horizontal turn buckle; 6-waterproof roll material; 7-cushion concrete; 71-sloping bottom concrete; 8-a wrench; 9-a nut; 10-a level gauge; 11-a total station; 12-a prism; 13-a sliding staff; 14-steel skeleton column; 15-pressure grouting machine; a 16-section steel beam; 17-raft plate steel bars; 18-guy rope; 19-pulling the plate; 20-foundation bolts; 21-lap joint rib plate.
Detailed Description
As shown in fig. 1 to 17, the construction method of the embedded foundation fixing device of the multi-story building steel reinforced concrete core tube structure of the present invention comprises the following steps:
step 1, excavating earth to a designed elevation, then removing pile heads, excavating bearing platforms vertically and vertically, and excavating a 45-degree slope of a part with a reinforcement cage at the bottom of the slope, wherein the concrete is shown in figure 6. The earthwork excavation is strictly prohibited from being over excavated, mechanical excavation is carried out until the height is 100-200 mm higher than the design elevation, manual excavation is carried out until the design elevation is reached, a cushion layer concrete 7 with the thickness of 100mm is poured after a base layer is cleaned up, and the flatness is strictly controlled when the cushion layer concrete 7 is poured; fully paving the waterproof roll 6 by adopting a pre-paving and reverse-sticking method, particularly referring to fig. 6, cleaning a base layer before paving and sticking to ensure that the base layer is clean and dry, paving and sticking an additional layer at a reentrant corner part at first, paving and sticking on a large surface, ensuring that the lap joint width of the waterproof roll 6 is not less than 100mm when paving and sticking to ensure that the waterproof layer forms an integral waterproof system;
Connecting an embedded part 2 with a steel frame 1 through four horizontal turn-buckle bolts 5, respectively welding two ends of each horizontal turn-buckle bolt 5 on four vertical prisms of the steel frame 1 and the embedded part 2, ensuring that the four horizontal turn-buckle bolts 5 are on the same horizontal plane, fixing the steel frame 1 and the embedded part 2 relatively after welding is completed, enabling inner screw openings of the horizontal turn-buckle bolts 5 to be bilaterally symmetrical, simultaneously screwing two adjacent horizontal turn-buckle bolts 5 in the same direction, screwing the other two horizontal turn-buckle bolts 5 reversely, enabling the screwed displacement to be equal, adjusting the relative position of the embedded part 2 and the steel frame 1, and ensuring that the embedded part 2 and the steel frame 1 are fixed relatively after adjustment is completed; steel reinforcement cage reinforcing bar 3 includes gluten and cushion cap bottom reinforcing bar, and the gluten adopts the ligature connection on the upper portion of steelframe 1, gluten and 1 upper portion angle steel of steelframe adopt welded connection. The inclined parts at two ends of the reinforcing steel bar at the bottom of the bearing platform are the same as the side surface inclined angle of the slope bottom of the bearing platform, and form an angle of 45 degrees with the horizontal plane; the horizontal part of the steel bar at the bottom of the bearing platform is arranged on the angle steel at the bottom of the steel frame 1 and penetrates through the embedded part 2 and the steel frame 1; the horizontal part of cushion cap bottom reinforcing bar is connected with 1 welded connection of steelframe, and its slope part stretches out the surface of gluten and is connected with the gluten ligature, and the reinforcing bar cage is seen in the detail figure 5.
step 5, hoisting the steel skeleton column 14 after the slope bottom concrete 71 reaches the designed strength, and particularly referring to fig. 10, connecting the steel skeleton column 14 and the embedded part 2 through 4 anchor bolts, and fastening the anchor bolts by two nuts 9 and gaskets, and particularly referring to fig. 11;
and 6, in order to ensure the compactness of concrete at the column base part of the steel rib column 14, column base grouting is carried out by adopting a pressure grouting method, as shown in detail in figure 11, C40 non-shrinkage fine stone concrete is selected as column base grouting slurry of the steel rib column 14, the grouting slurry preparation needs to be supervised and checked by a specially-assigned person, the grouting slurry is stirred strictly according to the preparation proportion in a product specification, mechanical stirring is preferably adopted, and the grouting is carried out by using a pressure grouting machine 15 after uniform stirring. The tight sealing between the template and the foundation and between the templates needs to be ensured, and the gaps need to be sealed by using adhesive tapes. Binding steel bars in the steel reinforced column 14 and the bearing platform as shown in FIG. 12;
and 7, embedding foundation bolts 20 before pouring a raft cushion layer, and welding steel plates with holes of 40mm in the middle on four vertical surfaces of each steel rib column 14 and 3 meters below the top of the column. After the raft cushion layer is poured, installing a cable rope 18, as shown in fig. 12 in detail, wherein one end of the cable rope 18 is fixed on a steel plate of a steel skeleton column 14, the other end of the cable rope is connected with an embedded foundation bolt 20 through a manual hoist, a hook of the manual hoist hooks a hole of a pull plate 19, the other hole of the pull plate 19 penetrates through the foundation bolt 20, and finally, a nut is installed on the foundation bolt 20 for fixing;
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention should be included in the scope of the present invention.
Claims (6)
1. A construction method of a multi-story building steel reinforced concrete core tube structure embedded foundation fixing device is characterized by comprising the following steps:
step 1, excavating earth to a designed elevation to form a bearing platform, excavating vertically around the bearing platform, and excavating 45-degree slope of a part of a reinforcement cage placed at the slope bottom; cleaning an inner base layer of the bearing platform, pouring cushion layer concrete with the thickness of 100mm, fully paving the waterproof coiled material by adopting a pre-paving and reverse-sticking method, ensuring that the lap joint width is not less than 100mm when the waterproof coiled material is paved, and ensuring that the waterproof layer forms an integral waterproof system;
step 2, manufacturing a slope bottom reinforcement cage on site, wherein the reinforcement cage consists of five parts: the steel frame, the embedded part, the steel reinforcement cage steel bar, the vertical turn buckle and the horizontal turn buckle; the size of the bottom surface of the steel frame is the same as that of the slope bottom of the bearing platform, the height of the bottom surface of the steel frame is 3cm higher than the surface of the bearing platform in the bearing platform, the thickness of an upper steel bar protection layer is ensured, and a vertical turn buckle is arranged at a distance of 10cm away from 4 corners of the steel frame and used for adjusting the overall height and the flatness of the steel bar cage;
connecting the embedded part with the steel frame through four horizontal turn-buckle bolts, wherein two ends of each horizontal turn-buckle bolt are respectively welded on four vertical prisms of the steel frame and the embedded part, so that the four horizontal turn-buckle bolts are ensured to be positioned on the same horizontal plane, and the steel frame and the embedded part are relatively fixed after welding is finished;
the reinforcement cage reinforcement comprises gluten and reinforcement at the bottom of the bearing platform, the gluten is arranged at the upper part of the steel frame, the gluten is bound and connected, and the gluten is welded with angle steel at the upper part of the steel frame;
step 3, hoisting the steel reinforcement cage after the steel reinforcement cage is manufactured, performing elevation measurement on the steel reinforcement cage by using a level gauge and a tower ruler, and adjusting the height of the steel reinforcement cage by adjusting a vertical turn buckle; accurately positioning the embedded part by using a total station and a prism, and adjusting the relative position between the embedded part and the steel frame by adjusting the horizontal turnbuckle;
step 4, after the installation and the positioning of the steel reinforcement cage are completed, and slope bottom concrete of the bearing platform is poured after the installation and the positioning are checked and accepted, the slope bottom concrete is compacted in a vibrating mode during pouring, the flatness and the elevation are strictly controlled, and the accuracy of the installation of the steel reinforced column is guaranteed;
step 5, hoisting the steel rib column after the slope bottom concrete reaches the designed strength, connecting the steel rib column with the embedded part through 4 anchor bolts, and fastening the anchor bolts by adopting two nuts and gaskets;
step 6, adopting a pressure grouting method to perform column base grouting in order to ensure the compactness of concrete at the column base part of the steel rib column;
step 7, embedding foundation bolts before pouring a raft cushion layer, and welding steel plates with holes of 40mm in the middle on the four vertical surfaces of each steel reinforced column and 3 meters below the column top; after the raft cushion layer is poured, installing a cable rope, wherein one end of the cable rope is fixed on a steel plate of the steel skeleton column, and the other end of the cable rope is connected with a pre-embedded foundation bolt through a manual hoist;
step 8, correcting the position of the steel rib column by using a total station; manufacturing the section steel beams in a factory, hoisting the section steel beams after the position correction of the steel skeleton columns is completed, and installing and fixing the section steel beams between the tops of two adjacent steel skeleton columns;
step 9, binding raft reinforcing steel bars after the waterproof coiled materials are completely paved, binding bottom reinforcing steel bars of the raft, welding reinforcement plates on four surfaces of each steel rib column to ensure continuous transmission of internal force of the reinforcing steel bars, welding the elevation of the upper parts of the reinforcement plates to be the same as that of the bottom reinforcing steel bars of the raft foundation, welding the bottom reinforcing steel bars of the raft penetrating through the steel rib columns with the reinforcement plates to form a whole with the steel rib columns, and then completely binding the raft reinforcing steel bars; the thickness of the protective layer and the distance between the reinforcing steel bars are ensured during the binding of the reinforcing steel bars; after the steel bars pass the acceptance check, pouring concrete in the bearing platform, and pouring the concrete to the bottom of the raft plate;
step 10, after the concrete in the bearing platform reaches the designed strength, beginning to dismantle the cable rope on the steel reinforced column, firstly dismantling the hand-operated hoist, then screwing down the nut on the foundation bolt, and finally untie the cable rope at one end of the steel reinforced column; pouring raft plate concrete after the cable wind rope is disassembled;
step 11, an inner support scaffold is erected, reinforcing steel bars of a steel rib column are bound after the scaffold is erected, a bottom die and a side plate template of a section steel beam are firstly laid after a template of the steel rib column is erected, then the reinforcing steel bars of the section steel beam are bound, a beam side mold is closed after all the reinforcing steel bars of the section steel beam are bound, a tie screw is used for reinforcing, plate reinforcing steel bars are bound, and the reinforcing steel bars on the lower layer of the plate penetrate through beam reinforcing steel bars to bind the plate reinforcing steel bars; and (5) checking and accepting after the binding of the steel bars and the reinforcement of the template are finished, and pouring concrete after the checking and accepting are passed.
2. The construction method of the embedded foundation fixing device of the multi-story building steel reinforced concrete core tube structure of claim 1, wherein in step 2, the inclined portions of the two ends of the reinforcement at the bottom of the bearing platform are inclined at an angle equal to the side surface inclination angle of the slope bottom of the bearing platform, and are at an angle of 45 ° to the horizontal plane; the horizontal part of the steel bar at the bottom of the bearing platform is arranged on the angle steel at the bottom of the steel frame and penetrates through the embedded part and the steel frame; the horizontal part and the steelframe welded connection of cushion cap bottom reinforcing bar, its slope part stretch out the surface of gluten and with gluten binding connection.
3. The construction method of the embedded foundation fixing device of the multi-story building steel reinforced concrete core tube structure of claim 1, wherein in step 3, if the height of the steel reinforcement cage exceeds the design elevation, the vertical turn buckle is clockwise screwed by a wrench to lower the steel reinforcement cage, and if the height of the steel reinforcement cage is lower than the design elevation, the vertical turn buckle is anticlockwise screwed by a wrench to raise the steel reinforcement cage; if the embedded part is deviated to the left, the wrench is used for screwing the two horizontal turn-buckle bolts on the left side anticlockwise, and simultaneously screwing the two horizontal turn-buckle bolts on the right side clockwise; if the embedded part is inclined to the right, clockwise screwing the two horizontal turn-buckle bolts on the left side by using a wrench, and simultaneously anticlockwise screwing the two horizontal turn-buckle bolts on the right side; if the embedded part is inclined to the front, the front two horizontal turn-buckle bolts are screwed anticlockwise through a spanner, and the rear two horizontal turn-buckle bolts are simultaneously screwed clockwise; if the embedded part is inclined backwards, clockwise screwing the two rear horizontal turn-buckle bolts and anticlockwise screwing the two front horizontal turn-buckle bolts by using a spanner; and when the positioning is finished, the relative fixation of the embedded part and the steel frame is ensured.
4. The construction method of the embedded foundation fixing device of the multi-story building steel reinforced concrete core tube structure according to claim 1, wherein in step 6, C40 non-shrinkage fine aggregate concrete is selected as column base grouting slurry of the steel reinforced column, the grouting slurry is prepared and mixed strictly according to the preparation proportion in the product specification, mechanical stirring is adopted, and a pressure grouting machine is used for grouting after uniform stirring, so as to ensure that the sealing between the formwork and the foundation, and between the formwork and the formwork is tight, and the gaps need to be sealed by adhesive tapes.
5. The method as claimed in claim 1, wherein the hand-operated hoist is hooked to one hole of the pulling plate, and the other hole of the pulling plate is passed through the anchor bolt, and finally the anchor bolt is fastened by installing a nut thereon in step 7.
6. The method as claimed in claim 1, wherein the steel reinforced concrete core tube structure embedded foundation fixing device is constructed by connecting the steel reinforced column and the section steel beam by the connecting plate in step 8, wherein the steel reinforced column and the section steel beam are provided with 12 uniformly distributed preformed holes for bolt connection, and after the connecting plate is connected, the joint of the steel reinforced column and the section steel beam is welded.
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CN108412036A (en) * | 2018-03-19 | 2018-08-17 | 北京工业大学 | Assembled H profile steel column-isolated footing-concrete collar tie beam cross connecting node |
CN109680833A (en) * | 2019-02-15 | 2019-04-26 | 姚攀峰 | The prefabricated reinforcing bar concrete panel component of self-bearing type, wall, structural system and production method |
CN110644482A (en) * | 2019-08-22 | 2020-01-03 | 中国十七冶集团有限公司 | Waterproof construction method for PHC pipe pile head of super-large-area terrace |
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