CN116122561A - Construction method of sinking type combined formwork - Google Patents
Construction method of sinking type combined formwork Download PDFInfo
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- CN116122561A CN116122561A CN202310048990.5A CN202310048990A CN116122561A CN 116122561 A CN116122561 A CN 116122561A CN 202310048990 A CN202310048990 A CN 202310048990A CN 116122561 A CN116122561 A CN 116122561A
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- lower platform
- rod
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/02—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for rooms as a whole by which walls and floors are cast simultaneously, whole storeys, or whole buildings
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides a construction method of a sinking type combined formwork, which comprises the steps of pouring a ring beam, assembling the formwork, adjusting the depth of a lower platform through an adjustable connecting rod, prepressing the formwork, constructing a structure, dismantling the formwork and the like. According to the invention, the upper cross beam is arranged at the wellhead, and the lower platform is lifted by the adjustable connecting rod and can be freely adjusted from top to bottom or from bottom to top, so that the investment of setting up a full framing is reduced, the risk of high formwork construction operation is reduced, the whole construction period is shortened, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of formwork construction, in particular to a construction method of a sinking type combined formwork.
Background
At present, full-hall type template supports are adopted for construction of in-well high-rise cast-in-place structures such as top plates, maintenance platforms and stairways of a submerged deep foundation pit basement, the method is suitable for construction of a deep foundation pit with the depth of 0-8m, once the depth is increased, the full-hall type template supports are difficult to construct, for example, the deep foundation pit basement with the depth of more than 50m is difficult to construct, if the conventional full-hall type template supports are adopted, full-hall supports with the height of 50m are required to be erected, the construction risk of building the ultra-high full-hall supports in a limited space is large, materials are more invested, the construction period is long, the manufacturing cost is high, and the later-stage supports are difficult to dismantle.
Disclosure of Invention
Aiming at the prior art, the invention provides a construction method of a sinking type combined formwork.
The invention provides a construction method of a sinking type combined formwork, which comprises the following steps:
s1, pouring a ring beam: casting a ring beam at the wellhead along the circumferential direction;
s2, assembling a die carrier: hoisting a lower platform main beam into a foundation pit, keeping a hoisting posture, and installing an upper cross beam and an upper tie beam of a fixed wellhead at the upper end of the ring beam; adjusting the height of the lower platform main beam, and installing a plurality of adjustable connecting rods to connect and fix the lower platform main beam and the upper cross beam; retracting the automobile crane and installing a lower platform secondary beam; wherein, both ends of the lower platform girder are provided with mechanical top clamps;
s3, adjusting the depth of the lower platform through an adjustable connecting rod: measuring and positioning to determine the depth of the lower platform to be adjusted, and configuring the adjustable connecting rod according to the field requirement;
s4, prepressing a die carrier: after the die frame is assembled, pre-pressing the die frame according to the load of the construction structure; installing a laser horizontal alignment instrument on the upper tie beam to monitor the deformation of the upper cross beam, and adjusting the adjustable connecting rod according to the deformation condition to form a die carrier pre-arch so as to eliminate the structural deformation; after the pre-pressing deformation of the die carrier is stable, synchronously adjusting the mechanical top clamps at the two ends of the main beam of the lower platform to fix the mechanical top clamps with the shaft wall of the vertical shaft;
s5, construction structure: after the formwork prepressing is finished, constructing steel bars, structural templates and concrete in a normal high formwork mode;
s6, dismantling the die carrier: and dismantling a structural template on the lower platform, loosening mechanical top clamps at two ends of a main beam of the lower platform, tensioning and fixing the main beam of the lower platform by an automobile crane, dismantling the adjustable connecting rod, dismantling the lower platform, and dismantling the upper tie beam and the upper cross beam.
Preferably, in S1, the ring beam is formed by casting reinforced concrete, and the height of the ring beam is not less than 30cm, and the width of the ring beam is not less than 100cm.
Preferably, in S2, a sleeve is sleeved on the outer side of the adjustable connecting rod, so as to prevent the adjustable connecting rod from contacting with the structural plate concrete.
Preferably, in the step S2, the mechanical top clip includes a screw rod, one end of the screw rod is in threaded connection with the lower platform main beam and is fixed through an adjusting nut, and the other end of the screw rod is fixed with a top for fixing with a well wall.
Preferably, in S2, the adjustable connecting rod is formed by connecting a head rod and a plurality of standard rods, the head rod and the standard rods are provided with internal threads at one end and threaded rods at the other end, the threaded rods are mutually matched with the internal threads, the threaded rods of the head rod are connected with the upper cross beam, and the threaded rods of the head rod are longer than the threaded rods of the standard rods.
Preferably, the outer end part of the threaded rod and the internal thread are provided with bolt holes, and the threaded rod is fixedly connected with the internal thread through bolts.
Preferably, the lengths of the head rod and the threaded rod thereof are 500mm, and the standard rod comprises three specifications, namely a 500mm long standard rod, a 1000mm long standard rod and a 2000mm long standard rod.
Preferably, in S4, the laser leveling instrument includes a laser transmitter rotatably connected to the upper tie beam, and a tube level is provided on the laser transmitter.
Compared with the prior art, the invention has the beneficial effects that: in the construction process of the deeper shaft cast-in-situ structure or by adopting a sinking adjustable combined formwork for an installation operation platform, the main beneficial effects are as follows:
1. the construction cost is reduced: the investment of a large number of steel pipe supports can be reduced, the materials of the sinking type adjustable combined die carrier can be recycled, the material combination can be adjusted according to the structural size and depth of the vertical shaft, the adaptability is strong, and the construction cost can be reduced.
2. And the construction risk is reduced: in the construction process, the formwork is combined and adjusted at the upper part, so that the high formwork is prevented from being erected in a limited space, and the risk in the construction operation process is reduced.
3. The construction adaptability is strong: the adjustable combined formwork can be adjusted to any construction height according to the requirements of the existing places, can be assembled and submerged at will according to the size and the structure of a vertical shaft, and has strong construction adaptability. If a full framing is adopted, the framing needs to be removed when sinking, the framing needs to be increased upwards, the operation difficulty is high, elevation control is difficult, and construction adaptability is poor.
4. The construction efficiency is improved: the adjustable combination die frame of sinking is through assembling of a large amount of mechanical type combination bars, and in the assembly process, can rely on equipment cooperation such as automobile crane, greatly improved the efficiency of construction, once assemble the shaping after, later stage adjustment height in-process single just can operate, avoid shaft limited space and support moreover, illumination and interim power consumption safety, efficiency of construction can improve by a wide margin. Taking a 5m×5m rectangular shaft structure as an example: the setting up speed of the full framing is about 2.0m/d (including elevation adjustment), the dismantling time of the framing is 7-14d, if the sinking adjustable combined formwork is adopted, the first installation is 1-2d, and the later adjustment is only 0.5-1d.
Drawings
Fig. 1 is a schematic structural diagram of a sinking type combined formwork in an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of a sinking type combined mold frame in an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a mechanical top card according to an embodiment of the invention.
Fig. 4 and 5 are schematic structural views of an adjustable connecting rod according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a laser horizontal aligner according to an embodiment of the present invention.
In the figure: 1. a ring beam; 2. a lower platform girder; 3. an upper cross beam; 4. an upper tie beam; 5. an adjustable linkage; 51. a head connecting rod; 52. a 500mm long standard rod; 53. a standard rod of 1000mm length; 54. 2000mm long standard rod; 6. a first backing plate; 7. a sleeve; 8. a lower platform secondary beam; 9. a mechanical top card; 91. a screw rod; 92. an adjusting nut; 93. a plug; 94. a second backing plate; 10. a laser emitter; 11. a tube level.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Examples
The construction method of the sinking type combined formwork is shown in fig. 1-6, and comprises the following steps:
s1, pouring a ring beam: as shown in fig. 1 and 2, a ring beam 1 is poured by adopting reinforced concrete along the circumferential direction at a wellhead position, the ring beam 1 is used as the supporting stress of a die carrier, the height is not less than 30cm, the width of each side is not less than 100cm, the top standard height and the flatness of the ring beam 1 are strictly controlled, and a vertical shaft with a lock ring beam can be used as the ring beam by arranging a steel plate above the lock ring beam.
S2, assembling a die carrier: as shown in fig. 1 and 2, a lower platform main beam 2 is hoisted into a foundation pit, a hoisting posture is maintained, and an upper cross beam 3 and an upper tie beam 4 for fixing a wellhead are arranged at the upper end of a ring beam 1; the height of the lower platform girder 2 is adjusted, a plurality of adjustable connecting rods 5 are installed by adopting fixing nuts to connect and fix the lower platform girder 2 with the upper cross beam 3, the connecting point is arranged at the joint of the upper cross beam 3 and the upper tie beam 4, as shown in figure 5, first base plates 6 are arranged between the fixing nuts and the lower platform girder 2 and the upper cross beam 3, and sleeves 7 are sleeved outside the adjustable connecting rods 5 to prevent the adjustable connecting rods 5 from contacting structural concrete; the truck crane is retracted and the lower platform secondary beam 8 is installed.
Wherein, the both ends of lower part platform girder 2 all are provided with machinery top card 9, and as shown in fig. 3, machinery top card 9 includes lead screw 91, and the one end and the lower part platform girder 2 threaded connection of lead screw 91 to through adjusting nut 92 fixed, the other end of lead screw 91 is fixed with top 93, and top 93's structure is the cone for with the wall of a well is fixed, is equipped with second backing plate 94 between adjusting nut 92 and the lower part platform girder 2, is used for transmitting top 93's counter-force.
As shown in fig. 4 and 5, the adjustable connecting rod 5 is formed by connecting a head connecting rod 51 and a plurality of standard rods, wherein one end of each of the head connecting rod 51 and the standard rods is provided with an internal thread, the other end of each of the head connecting rod 51 and the standard rods is provided with a threaded rod, the threaded rods are matched with the internal threads, the threaded rods of the head connecting rod 51 are connected with the upper cross beam 3, and the threaded rods of the head connecting rod 51 are longer than the threaded rods of the standard rods; the outer end part of the threaded rod and the internal thread are respectively provided with a bolt hole, and the threaded rod is fixedly connected with the internal thread through bolts; the length of the head rod 51 and its threaded rod are 500mm, and the standard rods comprise three specifications, namely a 500mm long standard rod 52, a 1000mm long standard rod 53 and a 2000mm long standard rod 54.
S3, adjusting the depth of the lower platform through an adjustable connecting rod: since the adjustable connecting rod 5 is designed as a sectional combined mechanical connection, the total adjustment of the lower platform above 50cm in depth can be achieved by increasing the number of sections of the standard rod and adjusting the sinking length of the threaded rod of the head rod 51. Measuring and positioning to determine the depth of the lower platform to be adjusted, configuring an adjustable connecting rod 5 according to the field requirement, adjusting one lower platform girder 2 at a time, hanging a single lower platform girder 2 by using an automobile crane, loosening a fixing nut above the adjustable connecting rod 5, adding or reducing the standard rod at the top, and after the automobile crane is matched with the lower platform girder 2 to descend or lift, adjusting to the designed elevation, fixing a head connecting rod 51 at the upper cross beam 3 again; for example: assuming that the lower platform needs to sink 7.3m (the top elevation of the ring beam is downward), 1 section of head connecting rod 51,3 section of 2000mm long standard rod 54,1 section of 500mm long standard rod 52 can be adopted, and the lengths of the combined and connected parts are 2+2+2+0.5+0.5+0.3 (the sinking of the threaded rod of the head connecting rod is adjusted to 0.3) =7.3 m;
s4, prepressing a die carrier: after the die carrier is assembled, pre-pressing the die carrier according to the load of the construction structure, wherein the aim is to eliminate the assembly gap of the die carrier and test the deformation degree and stability of the die carrier; a laser leveling instrument is arranged on the upper tie beam 4 to monitor the deformation of the upper cross beam 3, and as shown in fig. 6, the laser leveling instrument comprises a laser emitter 10, the laser emitter 10 is rotatably connected with the side part of the upper tie beam 4, and a tube leveling instrument 11 is arranged on the laser emitter 10 and used for detecting the levelness of the laser emitter 10; the adjustable connecting rod 5 is adjusted according to the deformation condition to form a mould frame pre-arch, so that the structural deformation is eliminated; after the pre-pressing deformation of the die carrier is stable, the mechanical top clamps 9 at the two ends of the lower platform main beam 2 are synchronously adjusted, so that the mechanical top clamps 9 are fixed with the shaft wall of the shaft and are used for preventing the lower platform main beam 2 from sliding and shaking;
s5, construction structure: after the pre-pressing of the die carrier is finished, constructing steel bars, structural templates and concrete in a normal high formwork form, and if the structure needs to erect a steel pipe support frame on the die carrier, placing a foot falling point of the steel pipe support frame right above a lower platform girder 2;
s6, dismantling the die carrier: the structural templates (and the steel pipe supporting frames) on the lower platform are removed, the mechanical top clamps 9 at the two ends of the lower platform girder 2 are loosened, the lower platform girder 2 is fixed by the automobile crane in a tensioning manner, the fixing nuts are removed, the adjustable connecting rods 5 are sequentially pulled out from the upper side, the lower platform is removed, the lower platform girders 2 are required to be removed one by one, large-area simultaneous removal is prohibited, and the upper tie beams 4 and the upper cross beams 3 are removed.
According to the invention, the upper cross beam 3 is arranged at the wellhead, and the lower platform is lifted by the adjustable connecting rod 5 and can be freely adjusted from top to bottom or from bottom to top, so that the investment of setting up a full framing is reduced, the risk of high formwork construction operation is reduced, the whole construction period is shortened, and the construction cost is reduced.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures made by the description of the invention and the accompanying drawings are directly or indirectly applied to other related technical fields, which are all within the scope of the invention.
Claims (8)
1. The construction method of the sinking type combined formwork is characterized by comprising the following steps of:
s1, pouring a ring beam: casting a ring beam at the wellhead along the circumferential direction;
s2, assembling a die carrier: hoisting a lower platform main beam into a foundation pit, keeping a hoisting posture, and installing an upper cross beam and an upper tie beam of a fixed wellhead at the upper end of the ring beam; adjusting the height of the lower platform main beam, and installing a plurality of adjustable connecting rods to connect and fix the lower platform main beam and the upper cross beam; retracting the automobile crane and installing a lower platform secondary beam; wherein, both ends of the lower platform girder are provided with mechanical top clamps;
s3, adjusting the depth of the lower platform through an adjustable connecting rod: measuring and positioning to determine the depth of the lower platform to be adjusted, and configuring the adjustable connecting rod according to the field requirement;
s4, prepressing a die carrier: after the die frame is assembled, pre-pressing the die frame according to the load of the construction structure; installing a laser horizontal alignment instrument on the upper tie beam to monitor the deformation of the upper cross beam, and adjusting the adjustable connecting rod according to the deformation condition to form a die carrier pre-arch so as to eliminate the structural deformation; after the pre-pressing deformation of the die carrier is stable, synchronously adjusting the mechanical top clamps at the two ends of the main beam of the lower platform to fix the mechanical top clamps with the shaft wall of the vertical shaft;
s5, construction structure: after the formwork prepressing is finished, constructing steel bars, structural templates and concrete in a normal high formwork mode;
s6, dismantling the die carrier: and dismantling a structural template on the lower platform, loosening mechanical top clamps at two ends of a main beam of the lower platform, tensioning and fixing the main beam of the lower platform by an automobile crane, dismantling the adjustable connecting rod, dismantling the lower platform, and dismantling the upper tie beam and the upper cross beam.
2. The construction method of the sinking type combined formwork as claimed in claim 1, wherein in the S1, the ring beam is formed by pouring reinforced concrete, and the height of the ring beam is not less than 30cm and the width of the ring beam is not less than 100cm.
3. A method of constructing a composite formwork according to claim 1 or 2, wherein in S2, a sleeve is fitted over the outer side of the adjustable link for preventing the adjustable link from contacting the structural slab concrete.
4. The construction method of the sinking type combined formwork according to claim 1 or 2, wherein in the step S2, the mechanical top clamp comprises a screw rod, one end of the screw rod is in threaded connection with the lower platform main beam and is fixed through an adjusting nut, and a top head is fixed at the other end of the screw rod and is used for being fixed with a well wall.
5. The construction method of the sinking type combined formwork according to claim 1 or 2, wherein in the step S2, the adjustable connecting rod is formed by connecting a head connecting rod and a plurality of standard rods, one ends of the head connecting rod and the standard rods are respectively provided with an internal thread, the other ends of the head connecting rod and the standard rods are respectively provided with a threaded rod, the threaded rods are mutually matched with the internal threads, the threaded rods of the head connecting rod are connected with the upper cross beam, and the threaded rods of the head connecting rod are longer than the threaded rods of the standard rods.
6. The construction method of the sinking type combined formwork as claimed in claim 5, wherein bolt holes are formed in the outer end portion of the threaded rod and the internal thread, and the threaded rod is fixedly connected with the internal thread through bolts.
7. The method of constructing a submerged mold frame according to claim 5, wherein the head rod and the threaded rod thereof have a length of 500mm, and the standard rod comprises three specifications, namely a 500mm long standard rod, a 1000mm long standard rod and a 2000mm long standard rod.
8. A method of constructing a drop-in composite formwork as claimed in claim 1 or claim 2 wherein in S4 the laser level aligner comprises a laser emitter rotatably connected to the upper tie beam, the laser emitter being provided with a tube level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048990.5A CN116122561A (en) | 2023-02-01 | 2023-02-01 | Construction method of sinking type combined formwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048990.5A CN116122561A (en) | 2023-02-01 | 2023-02-01 | Construction method of sinking type combined formwork |
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| Publication Number | Publication Date |
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| CN116122561A true CN116122561A (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310048990.5A Pending CN116122561A (en) | 2023-02-01 | 2023-02-01 | Construction method of sinking type combined formwork |
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| Country | Link |
|---|---|
| CN (1) | CN116122561A (en) |
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2023
- 2023-02-01 CN CN202310048990.5A patent/CN116122561A/en active Pending
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