CN116122656A - Chimney verticality control and deviation correction construction method - Google Patents
Chimney verticality control and deviation correction construction method Download PDFInfo
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- CN116122656A CN116122656A CN202211706643.9A CN202211706643A CN116122656A CN 116122656 A CN116122656 A CN 116122656A CN 202211706643 A CN202211706643 A CN 202211706643A CN 116122656 A CN116122656 A CN 116122656A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
- E04H12/341—Arrangements for casting in situ concrete towers or the like
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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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
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- Structural Engineering (AREA)
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Abstract
The invention discloses a chimney verticality control and deviation correction construction method, which comprises the following steps: s1: determining a basic center point of the chimney body; s2: determining and checking the central position of the chimney body; s3: centering, checking and positioning of chimney body steel bars and an outer template; s4: correcting: and (3) determining a center deviation direction according to a chimney shaft bottom measurement result, increasing lifting times for 5-10 hydraulic jacks in the center deviation direction, and closing needle valves of other hydraulic jacks at the same time, so that one side of an operation platform is intentionally improved to correct the center. The method is visual, clear and concise, and only after the lifting process and jacking in place, the relative position coincidence of the center of the plumb and the center reference object at the bottom of the chimney is observed at any time, so that the whole operation platform is proved to be parallel to the ground, and no front-back left-right offset occurs.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a chimney verticality control and deviation correction construction method.
Background
The chimney is gradually raised, so that the verticality control and correction are important, and at present, the control technology adopted for the verticality control and correction of the chimney is monitored by a multi-directional total station from the outside of the chimney. The multi-azimuth observation is needed, the measuring instrument is easy to receive, the technical level and the environmental influence of measuring staff are not intuitive, the adjustment is not rapid, and the correction difficulty is high.
Disclosure of Invention
In view of the above, the invention provides a chimney verticality control and deviation rectifying construction method, which is regulated by a local hydraulic device on the same side as the eccentric, and has the advantages of simple operation and outstanding effect.
The invention provides a chimney verticality control and deviation correction construction method, which adopts the following technical scheme:
a chimney verticality control and deviation correction construction method comprises the following steps:
s1: determining a basic center point of the chimney body: welding the central point of the foundation slab to +0.10m by using a detection part, measuring that the central point of the chimney shaft coincides with the coordinate point of the chimney shaft, and sawing a cross wire on the upper surface of the detection part by using a hacksaw blade;
s2: determining and checking the central position of the chimney body barrel: firstly, lifting a lifting cage at the center of a platform well frame to be higher than an operation platform by using a winch, determining the center point position of a chimney shaft through angle steel measurement, marking the center point position on the chimney shaft, and then hanging down a heavy weight by adopting a thin steel wire rope to align with a foundation center point;
s3: chimney body steel bar and outer template centering inspection and positioning: each 1.50m section of cylinder body construction steel bar is installed, centered, inspected and positioned, so that the center point position of the upper cylinder wall is determined, then the radius size of a template at the position of the cylinder body is measured to install the template, centering, inspecting and positioning are carried out on an outer template, centering and rechecking of an outer mold, steel bars, embedded parts and an inner template are carried out before concrete pouring, and recording is carried out;
s4: correcting: and (3) determining a center deviation direction according to a chimney shaft bottom measurement result, increasing lifting times for 5-10 hydraulic jacks in the center deviation direction, and closing needle valves of other hydraulic jacks at the same time, so that one side of an operation platform is intentionally improved to correct the center.
Optionally, the center point of the foundation base plate is determined according to the central line of the chimney body.
Optionally, the detecting member is made of Φ25 deformed steel bar.
Optionally, 200mm terrace C20 concrete in the chimney body is poured for stabilization.
Optionally, a wind shield is additionally arranged at the door and window opening of the chimney body.
Optionally, in step S4, the jack is leveled every 1800mm of calibration center and every 300mm of lifting.
Alternatively, the support rods of the operating platform are steel tubes of phi 48 x 3.5.
Optionally, the portal frame and the radiation beam on the operation platform adopt four-side rigid diagonal rods.
Optionally, after the step S5, the center verticality of the chimney body needs to be rechecked and controlled, when the center verticality of the chimney body is rechecked and controlled, a theodolite is adopted to recheck every 20m of ascending height of the cylinder construction, the theodolite is arranged at a point (the other point forms 90 degrees with the point) outside the 20m of the chimney body, the theodolite is well adjusted to measure two cross directions of the verticality of the chimney body, the center deviation condition of the cylinder is checked, and detailed records are well made.
Optionally, in step S4, the operation platform is an inclined plane in the deviation rectifying process.
In summary, the beneficial technical effects of the invention are as follows: the vertical correction device is visual, clear and concise, and only needs to observe the coincidence of the relative positions of the center of the plumb and the center reference object at the bottom of the chimney at any time after the lifting process and the jacking in place, so that the whole operation platform is proved to be parallel to the ground, and the front, back, left and right deflection does not occur, so that the chimney taking the operation platform as the reference is ensured to be vertical upwards, the verticality is controlled, the same reason is that even if the deflection occurs, the hydraulic jack is regulated by gradually sectioning and grouping at the same side of the deflection, and the correction can be effectively performed.
Drawings
FIG. 1 is a schematic illustration of a correction of an embodiment of the present invention.
Reference numerals illustrate: 1. and (5) operating the platform.
Detailed Description
The present invention will be described in further detail with reference to fig. 1.
The embodiment of the invention discloses a chimney verticality control and deviation correction construction method.
Referring to fig. 1, a method for controlling verticality and correcting deviation of a chimney includes the following steps:
s1: determining a basic center point of the chimney body: welding the central point of the foundation slab to +0.10m by using a detection part, measuring that the central point of the chimney shaft coincides with the coordinate point of the chimney shaft, and sawing a cross wire on the upper surface of the detection part by using a hacksaw blade;
s2: determining and checking the central position of the chimney body barrel: firstly, lifting a lifting cage at the center of a platform well frame to be higher than an operation platform by using a winch, determining the center point position of a chimney shaft through angle steel measurement, marking the center point position on the chimney shaft, and then hanging down a heavy weight by adopting a thin steel wire rope to align with a foundation center point;
s3: chimney body steel bar and outer template centering inspection and positioning: each 1.50m section of cylinder body construction steel bar is installed, centered, inspected and positioned, so that the center point position of the upper cylinder wall is determined, then the radius size of a template at the position of the cylinder body is measured to install the template, centering, inspecting and positioning are carried out on an outer template, centering and rechecking of an outer mold, steel bars, embedded parts and an inner template are carried out before concrete pouring, and recording is carried out;
s4: correcting: and (3) determining a center deviation direction according to a chimney shaft bottom measurement result, increasing lifting times for 5-10 hydraulic jacks in the center deviation direction, and closing needle valves of other hydraulic jacks at the same time, so that one side of an operation platform is intentionally improved to correct the center.
In the embodiment, the center point of the foundation base plate is determined according to the central line of the chimney shaft.
In this embodiment, the sensing element is implemented using Φ25 deformed steel bar. In the S1 step, phi 25 screw steel is welded to +0.10m, the central point of the chimney shaft is measured to be identical with the coordinate point of the chimney shaft, then 200mm terrace C20 concrete in the chimney shaft is poured to stabilize, and then a cross wire is sawn on the upper surface of the screw steel head by a steel saw blade.
In the embodiment, the angle steel is 2000mm long and 63 multiplied by 6, the position of the central point of the chimney shaft is determined by measurement and marked on the angle steel, and then a 20kg heavy weight is hung down by adopting a 5mm thin steel wire rope to be aligned with the central point of the foundation.
In the step S3, each 1.50m section of the drum body construction steel bar is installed, centered, inspected and positioned, thereby determining the center point position of the upper drum wall, namely the center point position of the correction template,
a wind shield is additionally arranged at the door and window opening of the chimney body.
Because the load distribution on the operation platform is uneven in the construction process, the concrete pouring is asymmetric, the diameter adjustment is not performed symmetrically, the operation platform can be displaced due to factors such as wind direction and wind force, the center of the lifting platform is easy to deviate due to the large wind force, and therefore the rigidity of the supporting rod of the operation platform is a key for preventing the center deviation phenomenon. Thus, the support rods of the operating platform are of Φ48×3.5 steel pipe. The upper door frame and the radiation beam of the operation platform adopt four-side rigid diagonal rods so as to improve the rigidity of the operation platform and prevent center deviation.
In step S4, the inclination of each deviation correction should not exceed 1/200 of the platform span. In the correction process, the platform is required to be in an inclined plane, and a folding plane cannot be generated. Larger deviations need to be corrected step by step and cannot be corrected once. Once every 1800mm of correction center, the jack is leveled every 300mm of lifting, and the general deviation value should not exceed 10mm, otherwise, the correction is needed once.
In the step S4, the operating platform in the deviation correcting process is in an inclined plane, and a folded surface state cannot be generated at the derrick. When the center deviation occurs, the correction is needed in time, and the correction is started when the common deviation value is not more than 10mm, so that the center deviation is prevented from being too large and difficult to correct.
After the step S5 is adjusted, the center verticality of the chimney body is required to be rechecked and controlled, when the center verticality of the chimney body is rechecked and controlled, a theodolite is adopted to recheck every 20m of rising height of the cylinder body construction, the theodolite is arranged at a point (the other point forms 90 degrees with the point) outside the chimney body 20m, the theodolite is well adjusted to measure two cross directions of the vertical degree of the chimney body, the center deviation condition of the cylinder body is checked, and detailed records are well made.
Is visual, clear and concise. As long as the relative positions of the center of the plumb and the center reference object at the bottom of the chimney are observed to coincide at any time after the lifting process and the jacking in place, the whole operation platform is proved to be parallel to the ground, and no front-back left-right offset occurs, so that the chimney taking the operation platform as a reference is ensured to be vertical upwards, and the verticality is controlled. In the same way, even if the deviation occurs, the hydraulic jack is adjusted by gradually dividing and grouping on the same side of the deviation, so that the deviation can be effectively corrected.
The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (10)
1. A chimney verticality control and deviation rectifying construction method is characterized in that: the method comprises the following steps:
s1: determining a basic center point of the chimney body: welding the central point of the foundation slab to +0.10m by using a detection part, measuring that the central point of the chimney shaft coincides with the coordinate point of the chimney shaft, and sawing a cross wire on the upper surface of the detection part by using a hacksaw blade;
s2: determining and checking the central position of the chimney body barrel: firstly, lifting a lifting cage at the center of a platform well frame to be higher than an operation platform by using a winch, determining the center point position of a chimney shaft through angle steel measurement, marking the center point position on the chimney shaft, and then hanging down a heavy weight by adopting a thin steel wire rope to align with a foundation center point;
s3: chimney body steel bar and outer template centering inspection and positioning: each 1.50m section of cylinder body construction steel bar is installed, centered, inspected and positioned, so that the center point position of the upper cylinder wall is determined, then the radius size of a template at the position of the cylinder body is measured to install the template, centering, inspecting and positioning are carried out on an outer template, centering and rechecking of an outer mold, steel bars, embedded parts and an inner template are carried out before concrete pouring, and recording is carried out;
s4: correcting: and (3) determining a center deviation direction according to a chimney shaft bottom measurement result, increasing lifting times for 5-10 hydraulic jacks in the center deviation direction, and closing needle valves of other hydraulic jacks at the same time, so that one side of an operation platform is intentionally improved to correct the center.
2. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: the central point of the foundation base plate is determined according to the central line of the chimney body.
3. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: the detection part adopts phi 25 screw steel.
4. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: and pouring concrete of a terrace C20 with the thickness of 200mm in the chimney body for stabilizing.
5. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: a wind shield is additionally arranged at the door and window opening of the chimney body.
6. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: in the step S4, the jack is leveled every 1800mm of calibration center and every 300mm of lifting.
7. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: the supporting rod of the operating platform adopts phi 48 multiplied by 3.5 steel pipes.
8. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: the upper door frame of the operation platform and the radiation beam adopt four-side rigid diagonal rods.
9. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: after the step S5 is adjusted, the center verticality of the chimney body is required to be rechecked and controlled, when the center verticality of the chimney body is rechecked and controlled, a theodolite is adopted to recheck every 20m of rising height of the cylinder body construction, the theodolite is arranged at a point (the other point forms 90 degrees with the point) outside the chimney body 20m, the theodolite is well adjusted to measure two cross directions of the vertical degree of the chimney body, the center deviation condition of the cylinder body is checked, and detailed records are well made.
10. The chimney verticality control and deviation rectification construction method according to claim 1, wherein the method comprises the following steps: in the step S4, the operation platform is in an inclined plane in the correction process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211706643.9A CN116122656A (en) | 2022-12-29 | 2022-12-29 | Chimney verticality control and deviation correction construction method |
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| CN202211706643.9A CN116122656A (en) | 2022-12-29 | 2022-12-29 | Chimney verticality control and deviation correction construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118881154A (en) * | 2024-08-07 | 2024-11-01 | 中国二十二冶集团有限公司 | Method for controlling vertical deviation of silo wall in slipform construction |
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2022
- 2022-12-29 CN CN202211706643.9A patent/CN116122656A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118881154A (en) * | 2024-08-07 | 2024-11-01 | 中国二十二冶集团有限公司 | Method for controlling vertical deviation of silo wall in slipform construction |
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