CN112324152A - Construction method for accurately installing annular foundation steel reinforcement framework of rotary hearth furnace - Google Patents
Construction method for accurately installing annular foundation steel reinforcement framework of rotary hearth furnace Download PDFInfo
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- CN112324152A CN112324152A CN202011186719.0A CN202011186719A CN112324152A CN 112324152 A CN112324152 A CN 112324152A CN 202011186719 A CN202011186719 A CN 202011186719A CN 112324152 A CN112324152 A CN 112324152A
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/122—Machines for joining reinforcing bars
- E04G21/123—Wire twisting tools
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- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a construction method for accurately installing an annular foundation steel reinforcement framework of a rotary hearth furnace, which comprises the following steps of 1, construction preparation; 2. manufacturing a main reinforcement and a stirrup of the steel reinforcement framework; 3. manufacturing a steel bar spacing control caliper; 4. erecting and positioning a steel bar support frame; 5. the distance control caliper is fixed on the support frame; 6. hoisting and placing the steel bars on the support frame for binding and mounting; 7. checking the spacing and the protection thickness; 8. dismantling the support frame; 9. position, spacing and protection thickness reexamination; 10. and carrying out the next procedure construction. The invention is safe and reliable, is made of general steel on the construction site, has simple structure, is convenient to manufacture and has good popularization value.
Description
Technical Field
The invention relates to the technical field of positioning and mounting of construction steel bars, in particular to a construction method for accurately mounting an annular foundation steel bar framework of a rotary hearth furnace.
Background
With the increasingly strict requirements of the country on environmental protection and energy consumption, the environmental protection and energy saving reconstruction in the steel industry becomes a mainstream trend, a large amount of metal dust and mud containing iron, zinc and the like is generated in the current steel production process, the comprehensive utilization rate of resources is low, the living environment is damaged, the safety and economic benefits of enterprises are seriously influenced, the rotary hearth furnace treatment technology is the most advanced treatment technology of the metallurgy metal dust and mud in the world at present, the reduction time is short, the adaptability of raw materials is strong, the energy consumption is low, the dezincification is thorough, the popularization and the application of the metallurgy industry are gradually realized, the market prospect of domestic rotary hearth furnace construction engineering is huge, and the construction and the operation quantity can be rapidly increased. The large-diameter annular foundation is the most applied foundation form in the construction engineering of the rotary hearth furnace, and the normal operation of the upper structure can be ensured only by having reliable rigidity and strength.
The annular foundation belongs to the special-shaped foundation, the difficulty of controlling the technology, operation, quality and the like in the construction process is higher than that of the conventional foundation with a regular shape, but the requirements on the rigidity and strength of the lower annular foundation structure are stricter in order to ensure the normal production and operation of equipment on the upper part of the rotary hearth furnace.
In the foundation structure engineering, the reinforcing bar installation is the most important, the biggest construction process of the degree of difficulty, especially the reinforcing bar location of major diameter annular basis, installation accuracy, interval control, protective layer thickness control are the outstanding difficult problem of puzzlement our construction safety and engineering quality always, most building sites are still according to traditional reinforcing bar installation technology, after the bed course construction, carry the reinforcing bar of making to the place in and carry out the ligature one by one, bottom surface reinforcement, the adjustment is accomplished the back, the welding stand, carry out top surface reinforcement, the adjustment, this kind of transmission way has following drawback:
1. hoisting machinery is frequently used for carrying the steel bars and adjusting the thickness of the protective layer;
2. the binding of the reinforcing steel bars one by one is carried out on the ground, the time and labor are consumed, and the working efficiency is low;
3. the roundness, the interval and the thickness of a protective layer of the steel bar cannot be accurately controlled;
4. there is high safety risk in carrying out top surface reinforcing bar installation operation through bottom surface welding stand.
For the above limiting factors, the traditional steel bar installation and construction method cannot effectively solve the problem, but also causes the increase of engineering cost, the prolongation of construction period, the increase of risks and the reduction of engineering benefits.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a construction method for accurately installing an annular foundation steel reinforcement framework of a rotary hearth furnace, and overcomes the defects that hoisting machinery is frequently used for steel reinforcement carrying and protective layer thickness adjustment in the traditional steel reinforcement installation process; the method has the advantages that the binding of the ground steel bars one by one is time-consuming and labor-consuming, the operation efficiency is low, the roundness, the interval and the thickness of the foundation steel bars cannot be accurately controlled, the safety risk defect exists and the like, and the accurate installation and construction method for the large-diameter annular concrete foundation steel bar framework of the rotary hearth furnace, which is convenient to operate, high in safety coefficient and capable of realizing accurate control, is provided.
In order to solve the technical problem, the invention is realized as follows:
a construction method for accurately installing an annular foundation steel reinforcement framework of a rotary hearth furnace is characterized by comprising the following steps:
step 1, construction preparation: the method comprises the steps of completing construction of an annular foundation bed of the rotary hearth furnace, and carrying out measurement and paying-off rotation;
step 2, manufacturing a main reinforcement and a stirrup of the steel reinforcement framework: manufacturing the main reinforcement and the stirrup of the annular foundation reinforcement by using a reinforcement cutting machine, a straightening machine and a bending machine;
step 4, erecting and positioning a steel bar support frame: the steel bar support frame comprises floor sweeping rods, cross rods, vertical rods and cross fasteners, the bottoms of the vertical rods are arranged in the positioning clamping grooves, the floor sweeping rods are arranged on the outer sides of the vertical rods, the cross rods are transversely connected among the vertical rods, the cross rods are connected with the vertical rods through the cross fasteners, and the steel bar support frame is positioned according to the outer side line of the annular foundation;
step 8, dismantling the support frame: after the detection is passed, stirrups are arranged on the annular foundation pad layer, bottom gluten support cross rods are sequentially detached, top gluten cross rods are detached, the spacing control caliper is detached in the next step, and the vertical rods and the sweeping rods are detached finally;
step 9, position, distance and protection thickness rechecking: after the support frame is dismantled, checking the position of a steel bar framework of the annular foundation of the rotary hearth furnace in place and the distance between steel bars;
step 10, carrying out the next procedure construction: and carrying out the next closed template process.
The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace is characterized by comprising the following steps of: the measurement paying-off in the step 1 comprises a central point of an annular foundation of the bottom furnace, an axis, a steel bar outline dimension control line and a foundation outer line positioning, wherein the axis is used for positioning the annular foundation by 30 degrees at every center, a steel bar with the length of 25cm is nailed at the intersection point of the axis and the foundation outer line, and the length of an exposed cushion layer is 15 cm.
The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace is characterized by comprising the following steps of: and 3, the steel bar spacing control ruler is made by cutting a plurality of clamping grooves through oxygen by using inequilateral angle steel, and the distance between the clamping grooves can be set according to engineering drawings.
The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace is characterized by comprising the following steps of: and (4) positioning the vertical rod of the steel bar support frame in the step 4 on the steel bar at the intersection point of the axis and the outer side line.
The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace is characterized by comprising the following steps of: in the step 6, the prefabricated steel bars are hoisted and placed on the bottom surface cross bars of the steel bar support frame, workers shift the steel bars into the clamping grooves of the spacing control ruler one by one, bind the steel bars, install the top surface cross bars and the spacing control ruler after the installation of the bottom surface steel bars is completed, repeat the step 6, and install the stirrups after the installation of the main bars is completed.
The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace is characterized by comprising the following steps of: and 8, dismantling the support frame, determining one axis as a first dismantling point, lowering the annular foundation framework onto a stirrup controlled by a bottom surface protective layer by adjusting the cross fastener, dismantling the cross rod and the spacing control ruler, dismantling the support frame on the second axis clockwise, repeating the steps, and completing the dismantling of the support frame and the installation and positioning of the annular foundation steel reinforcement framework section by section axis.
The invention has the beneficial effects that: compared with the traditional annular foundation steel bar construction technology, the method greatly reduces the use frequency of hoisting machinery, and after once hoisting is in place, subsequent procedures such as positioning, adjusting and the like do not need to use the hoisting machinery again; the invention adopts the suspended steel bars for binding, is easy to operate, can be constructed at multiple points simultaneously and improves the operation efficiency; the simple distance control caliper can ensure that the distance between the steel bars meets the design requirement, and the thickness of the steel bar protective layer is reliably controlled; the invention is safe and reliable, is made of general steel on the construction site, has simple structure, is convenient to manufacture and has good popularization value.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
fig. 1 is a schematic view of a support frame.
FIG. 2 is a schematic view of the ring base of the rotary hearth furnace.
Detailed Description
As shown in fig. 1 and 2: a construction method for accurately installing an annular foundation steel reinforcement framework of a rotary hearth furnace comprises the following steps:
step 1, construction preparation: the method comprises the steps of completing construction of an annular foundation bed of the rotary hearth furnace, and carrying out measurement and paying-off rotation;
step 2, manufacturing a main reinforcement and a stirrup of the steel reinforcement framework: manufacturing the main reinforcement and the stirrup of the annular foundation reinforcement by using a reinforcement cutting machine, a straightening machine and a bending machine;
step 4, erecting and positioning a steel bar support frame: the supporting frame comprises floor sweeping rods 1, cross rods 2, upright rods 3 and cross fasteners 4, the bottoms of the upright rods are arranged in positioning clamping grooves 7, the floor sweeping rods are arranged on the outer sides of the upright rods, the cross rods are transversely connected between the upright rods, the cross rods are connected with the upright rods through the cross fasteners, and the reinforcing steel bar supporting frame is positioned according to the outer side line of the annular foundation;
step 8, dismantling the support frame: the inspection is passed through the back, and the stirrup of discharging on the annular basis bed course demolishs end gluten in proper order and supports the horizontal pole, secondly demolishs a gluten horizontal pole, demolishs interval control slide caliper rule on next step, demolishs the pole setting at last and sweeps the floor the pole.
Step 9, position, distance and protection thickness rechecking: and after the support frame is dismantled, checking the position of the steel bar framework of the annular foundation of the rotary hearth furnace in place and the distance between the steel bars.
Step 10, carrying out the next procedure construction: and carrying out the next closed template process.
The measurement paying-off in the step 1 comprises a central point of an annular foundation of the bottom furnace, an axis, a steel bar outline dimension control line and a foundation outer line positioning, wherein the axis is used for positioning the annular foundation by 30 degrees at every center, a steel bar with the length of 25cm is nailed at the intersection point of the axis and the foundation outer line, and the length of an exposed cushion layer is 15 cm.
The steel bar spacing control ruler in the step 3 is made by cutting a plurality of clamping grooves through oxygen by adopting unequal angle steel, and the distance between the clamping grooves can be set according to engineering drawings;
and (4) positioning the vertical rod of the steel bar support frame in the step 4 on the steel bar at the intersection point of the axis and the outer side line.
In the step 6, the prefabricated steel bars are hoisted and placed on the bottom surface cross bars of the steel bar support frame, workers shift the steel bars into the clamping grooves of the spacing control ruler one by one, bind the steel bars, install the top surface cross bars and the spacing control ruler after the installation of the bottom surface steel bars is completed, repeat the step 6, and install the stirrups after the installation of the main bars is completed.
And 8, dismantling the support frame, determining one axis as a first dismantling point, lowering the annular foundation framework onto a stirrup controlled by a bottom surface protective layer by adjusting the cross fastener, dismantling the cross rod and the spacing control ruler, dismantling the support frame on the second axis clockwise, repeating the steps, and completing the dismantling of the support frame and the installation and positioning of the annular foundation steel reinforcement framework section by section axis.
Claims (6)
1. A construction method for accurately installing an annular foundation steel reinforcement framework of a rotary hearth furnace is characterized by comprising the following steps:
step 1, construction preparation: the method comprises the steps of completing construction of an annular foundation bed of the rotary hearth furnace, and carrying out measurement and paying-off rotation;
step 2, manufacturing a main reinforcement and a stirrup of the steel reinforcement framework: manufacturing the main reinforcement and the stirrup of the annular foundation reinforcement by using a reinforcement cutting machine, a straightening machine and a bending machine;
step 3, manufacturing a steel bar spacing control caliper: manufacturing a control ruler by using on-site waste steel according to the control requirements of the space between the steel bars and the protection thickness of a design drawing;
step 4, erecting and positioning a steel bar support frame: the steel bar support frame comprises floor sweeping rods, cross rods, vertical rods and cross fasteners, the bottoms of the vertical rods are arranged in the positioning clamping grooves, the floor sweeping rods are arranged on the outer sides of the vertical rods, the cross rods are transversely connected among the vertical rods, the cross rods are connected with the vertical rods through the cross fasteners, and the steel bar support frame is positioned according to the outer side line of the annular foundation;
step 5, fixing the distance control caliper on the support frame: adjusting the steel bar support frame according to the length of the spacing control ruler, and fixing the spacing control ruler on the cross rod;
step 6, hoisting and placing the steel bars on the support frame for binding and installing: hoisting the processed reinforcing steel bars to a reinforcing steel bar support frame, installing the reinforcing steel bars in clamping grooves of the spacing control ruler one by workers, and mechanically connecting and installing the reinforcing steel bars on site;
step 7, checking the distance and the protection thickness: after the main reinforcements are installed, the stirrups are installed, the whole annular foundation steel reinforcements are installed, and the steel reinforcement spacing and the thickness of the protective layer are checked;
step 8, dismantling the support frame: after the detection is passed, stirrups are arranged on the annular foundation pad layer, bottom gluten support cross rods are sequentially detached, top gluten cross rods are detached, the spacing control caliper is detached in the next step, and the vertical rods and the sweeping rods are detached finally;
step 9, position, distance and protection thickness rechecking: after the support frame is dismantled, checking the position of a steel bar framework of the annular foundation of the rotary hearth furnace in place and the distance between steel bars;
step 10, carrying out the next procedure construction: and carrying out the next closed template process.
2. The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace according to claim 1, characterized by comprising the following steps of: the measurement paying-off in the step 1 comprises a central point of an annular foundation of the bottom furnace, an axis, a steel bar outline dimension control line and a foundation outer line positioning, wherein the axis is used for positioning the annular foundation by 30 degrees at every center, a steel bar with the length of 25cm is nailed at the intersection point of the axis and the foundation outer line, and the length of an exposed cushion layer is 15 cm.
3. The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace according to claim 1, characterized by comprising the following steps of: and 3, the steel bar spacing control ruler is made by cutting a plurality of clamping grooves through oxygen by using inequilateral angle steel, and the distance between the clamping grooves can be set according to engineering drawings.
4. The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace according to claim 1, characterized by comprising the following steps of: and (4) positioning the vertical rod of the steel bar support frame in the step 4 on the steel bar at the intersection point of the axis and the outer side line.
5. The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace according to claim 1, characterized by comprising the following steps of: in the step 6, the prefabricated steel bars are hoisted and placed on the bottom surface cross bars of the steel bar support frame, workers shift the steel bars into the clamping grooves of the spacing control ruler one by one, bind the steel bars, install the top surface cross bars and the spacing control ruler after the installation of the bottom surface steel bars is completed, repeat the step 6, and install the stirrups after the installation of the main bars is completed.
6. The construction method for accurately installing the annular foundation steel reinforcement framework of the rotary hearth furnace according to claim 1, characterized by comprising the following steps of: and 8, dismantling the support frame, determining one axis as a first dismantling point, lowering the annular foundation framework onto a stirrup controlled by a bottom surface protective layer by adjusting the cross fastener, dismantling the cross rod and the spacing control ruler, dismantling the support frame on the second axis clockwise, repeating the steps, and completing the dismantling of the support frame and the installation and positioning of the annular foundation steel reinforcement framework section by section axis.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113550493A (en) * | 2021-07-09 | 2021-10-26 | 上海市基础工程集团有限公司 | Circular shaft concrete bottom plate steel bar support system and construction method |
| CN116819936A (en) * | 2023-06-30 | 2023-09-29 | 广东朗晖高科发展有限公司 | High-speed rail station digital clock installation method |
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| CN113550493A (en) * | 2021-07-09 | 2021-10-26 | 上海市基础工程集团有限公司 | Circular shaft concrete bottom plate steel bar support system and construction method |
| CN116819936A (en) * | 2023-06-30 | 2023-09-29 | 广东朗晖高科发展有限公司 | High-speed rail station digital clock installation method |
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