CN109610875B - Assembled floor door frame of existing building with elevator and construction method - Google Patents
Assembled floor door frame of existing building with elevator and construction method Download PDFInfo
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- CN109610875B CN109610875B CN201910070556.0A CN201910070556A CN109610875B CN 109610875 B CN109610875 B CN 109610875B CN 201910070556 A CN201910070556 A CN 201910070556A CN 109610875 B CN109610875 B CN 109610875B
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- 238000010276 construction Methods 0.000 title abstract description 17
- 238000011065 in-situ storage Methods 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 55
- 239000010959 steel Substances 0.000 claims description 55
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 11
- 230000008093 supporting effect Effects 0.000 claims description 10
- 239000004570 mortar (masonry) Substances 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
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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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention relates to an assembled floor door frame of an external elevator of an existing building and a construction method, comprising two prefabricated beams, two prefabricated columns and cast-in-situ columns, wherein the two prefabricated columns are oppositely arranged at two sides of an elevator floor door opening between two stair turning platforms of the two floors of the building; two ends of the precast beam are placed at the upper end of the precast column; the cast-in-situ column is arranged between the precast column and the turning platform of the upper elevator of the floor door opening in a cast-in-situ concrete mode to form the connecting nodes of the precast beam and the precast column. The invention has reasonable design and simple structure, can ensure the original strength of the building structure, is convenient to assemble, is easy to ensure the installation quality, shortens the construction period, saves the engineering cost, reduces the environmental pollution and creates favorable conditions for improving the construction quality.
Description
Technical Field
The invention relates to a building component, in particular to a prefabricated assembled floor door frame, and specifically relates to an assembled floor door frame of an existing building with an additional elevator and a construction method.
Background
At present, the elevator is added to the existing building to become an important civil engineering, and convenience is provided for middle-aged and elderly residents in the vast multi-storey residential building. Most of the existing buildings are externally provided with elevators which are arranged outside the position between the northfacades and the stairs, and holes and elevator doors are arranged on the outer walls of the buildings so that passengers can conveniently enter and exit the elevators and the buildings; but the position is a stair rest platform, the height of the stair rest platform is between two floors, ring beams are arranged on the floor elevation positions of the multi-layer brick-concrete building, and the ring beams are just in the range of a floor door opening to prevent people from entering and exiting; the ring beam is a main stressed structural member of the multi-layer building, and if damaged, the ring beam can affect the use safety of the building, so that a door frame with higher strength is required to be arranged for replacing the ring beam for bearing. According to the traditional construction process, after the building outer wall is provided with a hole, a template is supported along Zhou Bangza steel bars in the hole, and cast-in-place concrete beams and columns are reappeared, but the process has long field construction period and serious environmental pollution, has great influence on the existing households, and is easy to cause contradiction and even influence on project development.
Disclosure of Invention
The invention aims to solve the problems in the existing building external elevator at present, and provides an existing building external elevator assembled floor door frame and a construction method, which have the characteristics of high structural strength, easiness in assembly, rapidness in construction, low cost, less environmental pollution and the like, and create favorable conditions for reducing the construction time and ensuring the construction quality.
The technical scheme of the invention is as follows:
the prefabricated building external elevator assembled floor door frame comprises two prefabricated beams, two prefabricated columns and cast-in-situ columns, wherein the two prefabricated columns are oppositely arranged at two sides of an elevator floor door opening between two building stair turning platforms; two ends of the precast beam are placed at the upper end of the precast column; the cast-in-situ column is arranged between the precast column and the turning platform of the upper elevator of the floor door opening in a cast-in-situ concrete mode to form the connecting nodes of the precast beam and the precast column.
Furthermore, the upper end of the precast column is provided with column top overhanging steel bars, the two ends of the precast beam are respectively provided with beam end overhanging steel bars, the lower surface of the side beam of the turning platform of the upper side building ladder of the storey door opening is provided with rear-mounted steel bars, the column top overhanging steel bars, the beam end overhanging steel bars, the rear-mounted steel bars of the side beam of the turning platform of the stair and the cast-in-situ column hoop steel bars are bound and shaped mutually, and the connection nodes of the precast column, the precast beam and the turning platform of the stair are formed by casting concrete.
Further, the lower side stair turning platform boundary beam upper surface of the floor door opening is provided with a rear-mounted planting bar, the lower end of the prefabricated column is provided with a grouting sleeve, the rear-mounted planting bar can be inserted into the grouting sleeve, and then high-strength mortar is poured into the grouting sleeve to form a connecting node of the prefabricated column and the stair turning platform.
Furthermore, the side of the prefabricated column is provided with column side overhanging steel bars, and the corresponding parts of the walls at the two sides of the storey door opening are provided with grooves, so that the column side overhanging steel bars are arranged in the grooves, and connecting blocks are formed in a cast-in-place concrete mode to form connecting nodes of the prefabricated column and the walls.
Further, the connecting blocks comprise an upper connecting block and a lower connecting block, the upper connecting block is positioned at the elevation of the building ring beam, and the column side overhanging steel bars of the upper connecting block are mutually welded with the building ring beam, so that the building ring beam is reinforced, and the design load of the ring beam is transferred; the lower connecting block is positioned at 1/2 of the height of the upper connecting block, and plays a role in auxiliary support.
Furthermore, a filling wall body is arranged between the precast beam and the turning platform of the upper stair, so that the integrity and stability of the structure of the door opening of the stair are ensured.
A construction method of an assembled floor door frame of an existing building with an elevator added comprises the following steps:
(1) Before the door frame is assembled, cutting off a ring beam on the outer wall of a building, punching a door opening, punching an upper connecting block groove on the elevation of the ring beam, leaving ring beam steel bars at the edge of the door opening, and punching a lower connecting block groove;
(2) Drilling holes and planting ribs on the lower surface of the upper stair turning platform and the upper surface of the lower stair turning platform according to the designed positions; (3) Installing precast beams at two sides of a door opening, and inserting the planted bars on the upper surface of a turning platform of a lower stair into grouting sleeves at the bottom of a precast column; extending the overhanging steel bars at the side of the lower column into the grooves of the lower connecting blocks, and binding and forming with the stirrups; extending the overhanging steel bars on the side of the upper column into the grooves of the upper connecting blocks, welding the overhanging steel bars with the ring beam, and binding and forming by using stirrups; extending the overhanging steel bars of the top of the prefabricated column into the reserved space of the cast-in-situ beam; after aligning the position of the prefabricated column, supporting and fixing;
(4) Placing the prefabricated Liang Juzhong on the top of the prefabricated column, and extending the overhanging reinforcing steel bars at the beam end of the prefabricated beam into the reserved space of the cast-in-situ column; and binding and forming the overhanging reinforcing steel bars, the embedded reinforcing steel bars and the stirrups at the beam ends of the precast beams at the top of the precast column;
(5) Installing templates on the inner side, the outer side and the hole side of the cast-in-situ column, reserving pouring holes on the upper side of the templates, and supporting and fixing the templates after aligning the templates;
(6) Pouring high-strength mortar into the prefabricated column bottom pouring sleeve to form a connecting node of the prefabricated column and the lower stair turning platform;
(7) Pouring upper and lower connecting blocks on two sides to form connecting nodes of prefabricated columns, building ring beams and building walls;
(8) Pouring the cast-in-situ column to form a connection node of an upper side building ladder turning platform, a building precast beam, a precast column and a building wall;
(9) Removing the template supporting device and the template;
(10) Building a filling wall in a space surrounded by the precast beam, the upper stair turning platform and the cast-in-situ columns at two sides;
(11) Painting and decorating the inner wall, the outer wall and the inner periphery of the door opening.
The invention has the beneficial effects that:
the invention has reasonable design and simple structure, can ensure the strength of the original building structure, is convenient to assemble, is easy to ensure the installation quality, shortens the construction period, reduces the environmental pollution and creates favorable conditions for improving the construction quality.
Drawings
Fig. 1 is a schematic view in vertical section of the invention in application and is A-A in fig. 2.
Fig. 2 is a sectional view of B-B of fig. 1.
Fig. 3 is a cross-sectional view of fig. 1 taken along line C-C.
Fig. 4 is a partial enlarged view of K of fig. 2.
Fig. 5 is a partial enlarged view of P of fig. 2.
Fig. 6 is an enlarged view of part S of fig. 1.
Fig. 7 is a partial enlarged view of T of fig. 1.
Wherein: 1-a cast-in-situ column; 1-1-stirrups; 2-post-planting the ribs; 3-filling the wall body; 4-prefabricating a beam; 4-1-overhanging reinforcing steel bars at the beam ends; 5-1-an upper stair turning platform; 5-2-a lower stair turning platform; 6-building outer walls; 7-prefabricating a column; 7-1-overhanging reinforcing steel bars at the top of the column; 7-2-overhanging reinforcing steel bars on the column side; 8-building ring beams; 8-1-ring beam overhanging steel bars; 9-1-upper connecting blocks; 9-2-lower connecting blocks; 10-grouting a sleeve; 11-high-strength mortar; 12-side beams.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, 2 and 4, an external elevator assembled floor door frame for an existing building comprises a precast beam 4, precast columns 7, cast-in-situ columns 1 and the like. The prefabricated columns 7 are arranged on the left side and the right side, and are symmetrically arranged on two sides of a door opening formed in the building outer wall 6. The two ends of the precast beam 4 are placed at the top end of the precast column 7, and the length of the placed position is about 20-30mm, so that the precast beam can effectively bear load and occupy less casting space. The upper end of the prefabricated column 7 is provided with a column top overhanging steel bar 7-1, two ends of the prefabricated beam 4 are respectively provided with a beam end overhanging steel bar 4-1, the side beam thickness of the upper side stair turning platform of the storey door opening is larger than that of the corresponding stair turning platform, and the lower surface of the side beam 12 is provided with a rear-mounted planting steel bar 2. The post top overhanging steel bars 7-1, the beam end overhanging steel bars 4-1 and the rear planting steel bars 2 respectively extend into the reserved space of the cast-in-situ post 1 between the precast post 7, the upper side building ladder turning platform 5-1 of the floor door opening, the building outer wall 6 and the building template, are mutually bound with the stirrups 1-1 to form a steel bar cage, and then form the connection nodes of the precast post 7, the precast beam 5, the building outer wall 6 and the upper side building ladder turning platform 5-1 of the floor door opening in a cast-in-place concrete mode, so that an integral door frame is formed, and the design load of the building ring beam 8 can be born and transferred.
As shown in fig. 1, 2 and 5, the outer side edge of the lower stair turning platform 5-2 of the floor door opening is provided with a side beam 12, the upper surface of the side beam is provided with a rear-mounted planting bar 2, the lower end of the prefabricated column 7 is provided with a grouting sleeve 10, so that the rear-mounted planting bar 2 can be inserted into the grouting sleeve 10 from bottom to top, and then high-strength mortar 11 is poured into the grouting sleeve to form a connecting node of the prefabricated column 7 and the lower stair turning platform 5-2.
As shown in fig. 1, 6 and 7, the side surface of the prefabricated column 7 is provided with a column-side overhanging steel bar 7-2, and a groove is arranged on the corresponding position of the floor door opening, so that the column-side overhanging steel bar 7-2 is arranged in the groove, and a connecting block is formed in a cast-in-place concrete mode and is firmly connected with the groove. Preferably, the inner wall of the groove may be roughened to increase the bonding force. The connecting blocks comprise an upper connecting block 9-1 and a lower connecting block 9-2, wherein the upper connecting block 9-1 is positioned at the elevation of a building ring beam 8, a ring Liang Waishen reinforcing steel bar 8-1 with a certain length is reserved in a corresponding groove according to design when the ring beam 8 is cut off, so that the ring is mutually tied with the column-side overhanging reinforcing steel bar 7-2, the prefabricated column 7, the building ring beam 8 and the building wall 6 are connected into a whole, and the connecting nodes of the prefabricated column 7, the building ring beam 8 and the building outer wall 6 are formed, so that the building ring beam 8 is closed and reinforced, and the load of the building ring beam 8 can be transmitted. The lower connecting block 9-2 is located at 1/2 of the height at which the upper connecting block 9-1 is located. During construction, the lower group of column side overhanging steel bars 7-2 are placed in the lower groove, are bound with the stirrups 1-1 to form a steel reinforcement cage, and form a lower connecting block 9-1 in a cast-in-place concrete mode to form an outer lower side connecting node of the prefabricated column 7 and the building outer wall 6, so that an auxiliary supporting effect is achieved on the prefabricated column 7. Through the structural measures, the integral door frame of the elevator floor outside the building formed by the cast-in-situ column 1, the prefabricated column 7 and the prefabricated beam 4 is firmly connected with the building wall 6 into a whole, and the design loads of the original building wall 6 and the building ring beam 8 can be born and transferred, so that the original building structure is not weakened, but is reinforced, and the safety of the residential building is ensured.
As shown in fig. 1 and 3, the filling wall 3 is built in the space surrounded by the precast beam 4, the side beam of the upper stair turning platform 5-1 and the cast-in-situ column 1, so that the integrity and stability of the floor door opening structure are ensured.
The construction method of the assembled floor door frame of the elevator added to the existing building comprises the following steps:
(1) Before the door frame is assembled, firstly, a door opening is drilled on the outer wall of a building, a ring beam is cut off, a groove for preparing to pour an upper connecting block is drilled on the elevation of the ring beam, a ring beam reinforcing steel bar is reserved at the edge of the door opening, and then a groove for preparing to pour a lower connecting block is drilled;
(2) Drilling holes on the lower surface of the upper stair turning platform and the upper surface of the lower stair turning platform according to the designed positions, and installing rear-mounted planted bars;
(3) Installing precast beams at two sides of a door opening, and inserting the planted bars on the upper surface of a turning platform of a lower stair into grouting sleeves at the bottom of a precast column; extending the overhanging steel bars at the side of the lower column into the grooves of the lower connecting blocks, and binding and forming with the stirrups; extending the overhanging steel bars on the side of the upper column into the grooves of the upper connecting blocks, welding the overhanging steel bars with the ring beam, and binding and forming by using stirrups; extending the overhanging steel bars of the top of the prefabricated column into the reserved space of the cast-in-situ beam; after aligning the position of the prefabricated column, supporting and fixing;
(4) Placing the prefabricated Liang Juzhong on the top of the prefabricated column, and extending the overhanging reinforcing steel bars at the beam end of the prefabricated beam into the reserved space of the cast-in-situ column; and binding and forming the overhanging steel bars of the top of the prefabricated column, the overhanging steel bars of the beam end of the prefabricated beam, the rear-mounted embedded steel bars and the stirrups;
(5) Installing templates on the inner side, the outer side and the hole side of the cast-in-situ column, reserving pouring holes on the upper side of the templates, and supporting and fixing the templates after aligning the templates;
(6) Pouring high-strength mortar into the prefabricated column bottom pouring sleeve to form a connecting node of the prefabricated column and the lower stair turning platform;
(7) Pouring upper and lower connecting blocks on two sides to form connecting nodes of prefabricated columns, building ring beams and building walls;
(8) Pouring the cast-in-situ column to form a connection node of an upper side building ladder turning platform, a building precast beam, a precast column and a building wall;
(9) Removing the template supporting device and the template;
(10) Building a filling wall in a space surrounded by the precast beam, the upper stair turning platform and the cast-in-situ columns at two sides;
(11) Painting and decorating the inner wall, the outer wall and the inner periphery of the door opening.
The invention is not related in part to the same as or can be practiced with the prior art.
Claims (6)
1. The prefabricated building external elevator assembled floor door frame is characterized by comprising two prefabricated beams, two prefabricated columns and cast-in-situ columns, wherein the two prefabricated columns are oppositely arranged at two sides of an elevator floor door opening between two building stair turning platforms; two ends of the precast beam are placed at the upper end of the precast column; the cast-in-situ column is arranged between the precast column and the turning platform of the upper elevator of the floor door opening in a cast-in-situ concrete mode to form a precast beam and a precast column connecting node; the upper end of the precast column is provided with column top overhanging steel bars, two ends of the precast beam are respectively provided with beam end overhanging steel bars, the lower surface of the side beam of the turning platform of the upper side building ladder of the storey door opening is provided with rear-mounted embedded steel bars, the column top overhanging steel bars, the beam end overhanging steel bars, the rear-mounted embedded steel bars of the side beam of the turning platform of the stair and the cast-in-situ column hoop steel bars are mutually bound and shaped, and the connection nodes of the precast column, the precast beam and the turning platform of the stair are formed by casting concrete.
2. The prefabricated building external elevator assembled floor door frame according to claim 1, wherein the upper surface of the side sill of the lower side building elevator turning platform of the floor door opening is provided with rear-mounted embedded ribs, the lower end of the prefabricated column is provided with a grouting sleeve, the rear-mounted embedded ribs can be inserted into the grouting sleeve, and then high-strength mortar is poured into the grouting sleeve to form a connecting node of the prefabricated column and the stair turning platform.
3. The prefabricated building external elevator assembled floor door frame according to claim 1, wherein column side overhanging steel bars are arranged on the side surfaces of the prefabricated columns, grooves are formed in the positions, corresponding to the column side overhanging steel bars, of the wall bodies on the two sides of the floor door opening, the column side overhanging steel bars are placed in the grooves, connecting blocks are formed in a cast-in-place concrete mode, and connecting nodes of the prefabricated columns and the wall bodies are formed.
4. The pre-existing building external elevator assembled floor door frame according to claim 3, wherein the connecting blocks comprise an upper connecting block and a lower connecting block, the upper connecting block is positioned at the elevation of a building ring beam, and the column-side overhanging steel bars of the upper connecting block are welded with the building ring beam steel bars, so that the building ring beam is reinforced, and the design load of the ring beam is transmitted; the lower connecting block is positioned at 1/2 of the height of the upper connecting block, and plays a role in auxiliary support.
5. The prefabricated landing door frame for the external elevator of the existing building according to claim 1, wherein a filling wall is arranged between the prefabricated beam and the turning platform of the upper landing, so that the integrity and stability of the landing door opening structure are ensured.
6. A method of constructing an existing building add-on elevator assembly floor door frame according to any one of claims 1 to 5, comprising the steps of:
(1) Before the door frame is assembled, cutting off a ring beam on the outer wall of a building, punching a door opening, punching an upper connecting block groove on the elevation of the ring beam, leaving ring beam steel bars at the edge of the door opening, and punching a lower connecting block groove;
(2) Drilling holes on the lower surface of the upper stair turning platform and the upper surface of the lower stair turning platform according to the designed positions, and installing rear-mounted planted bars;
(3) Mounting precast beams on two sides of a door opening, and inserting rear-mounted planting bars on the upper surface of a turning platform of a lower stair into grouting sleeves at the bottom of a precast column; extending the overhanging steel bars at the side of the lower column into the grooves of the lower connecting blocks, and binding and forming with the stirrups; extending the overhanging steel bars on the side of the upper column into the grooves of the upper connecting blocks, welding the overhanging steel bars with the ring beam, and binding and forming by using stirrups; extending the overhanging steel bars of the top of the prefabricated column into the reserved space of the cast-in-situ beam; after aligning the position of the prefabricated column, supporting and fixing;
(4) Placing the prefabricated Liang Juzhong on the top of the prefabricated column, and extending the overhanging reinforcing steel bars at the beam end of the prefabricated beam into the reserved space of the cast-in-situ column; and binding and forming the overhanging steel bars of the top of the prefabricated column, the overhanging steel bars of the beam end of the prefabricated beam, the rear-mounted embedded steel bars and the stirrups;
(5) Installing templates on the inner side, the outer side and the hole side of the cast-in-situ column, reserving pouring holes on the upper side of the templates, and supporting and fixing the templates after aligning the templates;
(6) Pouring high-strength mortar into the prefabricated column bottom pouring sleeve to form a connecting node of the prefabricated column and the lower stair turning platform;
(7) Pouring upper and lower connecting blocks on two sides to form connecting nodes of prefabricated columns, building ring beams and building walls;
(8) Pouring the cast-in-situ column to form a connection node of an upper side building ladder turning platform, a building precast beam, a precast column and a building wall;
(9) Removing the template supporting device and the template;
(10) Building a filling wall in a space surrounded by the precast beam, the upper stair turning platform and the cast-in-situ columns at two sides;
(11) Painting and decorating the inner wall, the outer wall and the inner periphery of the door opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070556.0A CN109610875B (en) | 2019-01-25 | 2019-01-25 | Assembled floor door frame of existing building with elevator and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070556.0A CN109610875B (en) | 2019-01-25 | 2019-01-25 | Assembled floor door frame of existing building with elevator and construction method |
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| Publication Number | Publication Date |
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| CN109610875A CN109610875A (en) | 2019-04-12 |
| CN109610875B true CN109610875B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910070556.0A Active CN109610875B (en) | 2019-01-25 | 2019-01-25 | Assembled floor door frame of existing building with elevator and construction method |
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| CN112982851B (en) * | 2021-02-26 | 2022-11-08 | 中国二十冶集团有限公司 | Construction method of fire-fighting evacuation stair structure of movie theatre beside reserved column |
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| CN209620670U (en) * | 2019-01-25 | 2019-11-12 | 江苏瑞永建设工程技术有限公司 | A kind of additional elevator assembled floor doorframe of existing building |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6920728B2 (en) * | 2002-09-25 | 2005-07-26 | James M. Powers | Column and beam construction and method |
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2019
- 2019-01-25 CN CN201910070556.0A patent/CN109610875B/en active Active
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|---|---|---|---|---|
| JP2004124527A (en) * | 2002-10-03 | 2004-04-22 | Oriental Construction Co Ltd | Barrier-free construction method of staircase type apartment house by outer frame construction |
| JP2007016472A (en) * | 2005-07-07 | 2007-01-25 | Kurosawa Construction Co Ltd | Aseismatic reinforcing structure of existing building |
| KR20120122276A (en) * | 2011-04-28 | 2012-11-07 | 동국대학교 산학협력단 | Method of strengthening shearing force of precast concrete |
| CN102808465A (en) * | 2012-08-08 | 2012-12-05 | 沈阳建筑大学 | Assembly connecting structure and assembly connecting method of assembled concrete frame and shear wall combination |
| CN104727439A (en) * | 2015-03-09 | 2015-06-24 | 沈阳建筑大学 | Assembly concrete new type pillar and beam structure and assembly connecting method |
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| CN109610875A (en) | 2019-04-12 |
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