CN114058750B - Lap joint method for new and old foundations of whole horizontal moving of blast furnace - Google Patents
Lap joint method for new and old foundations of whole horizontal moving of blast furnace Download PDFInfo
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- CN114058750B CN114058750B CN202111438303.8A CN202111438303A CN114058750B CN 114058750 B CN114058750 B CN 114058750B CN 202111438303 A CN202111438303 A CN 202111438303A CN 114058750 B CN114058750 B CN 114058750B
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- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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Abstract
The invention discloses a new and old foundation lapping method for integral horizontal moving of a blast furnace, relates to the technical field of metallurgical engineering construction, and aims to provide a new and old foundation lapping method which is short in construction period, convenient to construct and used for integral horizontal moving of the blast furnace. The technical scheme adopted by the invention is as follows: the new and old foundation lapping method for the whole horizontal moving of the blast furnace comprises the following steps: s1, chiseling the top of an old foundation of a blast furnace; s2, constructing a foundation and a blast furnace pushing channel from the position assembled outside the blast furnace line to the position of the old foundation; s3, constructing a blast furnace structure at the position assembled outside the blast furnace line; s4, pushing the blast furnace structure to slide to the position of the old foundation; s5, cutting and removing the part of the pushing tray, which exceeds the new foundation of the blast furnace; s6, constructing a hoop layer on the outer sides of the old foundation and the new foundation of the blast furnace; s7, the blast furnace pushing channel is not dismantled, and concrete is poured in the area below the corresponding height of the new foundation of the blast furnace after the blast furnace is aligned to form a new and old lapped foundation. The invention is used for the integral hydraulic pushing and sliding construction of the blast furnace.
Description
Technical Field
The invention relates to the technical field of metallurgical engineering construction, in particular to a lapping method of a new foundation and an old foundation in the overall horizontal pushing construction process after the blast furnace is assembled outside a blast furnace line.
Background
A certain 2500m 3 The blast furnace is constructed by adopting a hydraulic pushing sliding technology, the diameter of the blast furnace is 14.90m, the height of the blast furnace is 38.88m, the horizontal sliding distance is 45m, and the integral pushing weight of the blast furnace including a foundation, refractory materials, a furnace body pipeline and equipment is about 7200 tons.
The method is characterized in that a new foundation needs to be constructed in the position where the blast furnace is assembled outside the line and in the area where the pushing and sliding pass, and the important problem of the integral hydraulic pushing and sliding construction of the blast furnace is that the new foundation and the new foundation are constructed again after the blast furnace top is pushed and slid to the old foundation and the new foundation is formed because the original foundation of the blast furnace cannot be completely removed, namely the old foundation of the blast furnace cannot be completely removed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a new and old foundation overlapping method which is short in construction period, convenient to construct and used for the overall horizontal transition of a blast furnace.
The technical scheme adopted by the invention is as follows: the new and old foundation lapping method for the whole horizontal transition of the blast furnace comprises the following steps:
s1, chiseling the top of the old foundation of the blast furnace to expose the original steel bars of the outer ring of the old foundation. For example, the exposed length of the original steel bars of the outer ring of the old foundation is 250mm.
Further, the method comprises the following steps: step S1 also performs a roughening process on the top surface and the side walls of the old foundation.
S2, constructing a foundation to the position of the old foundation from the position of the off-line assembly of the blast furnace along the area through which the pushing slips, wherein the top of the foundation is a pushing beam, a blast furnace pushing channel is constructed on the top of the pushing beam, and the blast furnace pushing channel is horizontally arranged and covers the position of the off-line assembly, the area through which the pushing slips and the position of the old foundation.
S3, constructing a blast furnace structure at the position assembled outside the blast furnace line; the blast furnace structure comprises a pushing tray, a new blast furnace foundation constructed on the top of the pushing tray and a blast furnace body constructed on the upper part of the new blast furnace foundation; the bottom of the pushing tray is arranged in a pushing channel of the blast furnace through a sliding shoe, vertical steel bars are welded at intervals along the direction of a circular ring on the pushing tray, circumferential steel bars are arranged among the vertical steel bars, a new blast furnace foundation is constructed in a space surrounded by the circumferential steel bars, and the new blast furnace foundation is of a reinforced concrete structure.
And S4, pushing the blast furnace structure to slide to the position of the old foundation, leveling and aligning the blast furnace structure, and fixing the pushing tray in the blast furnace pushing channel. For example, in step S2, the blast furnace pusher path includes a rail, and in step S4, the pusher tray is welded and fixed to the rail.
And S5, cutting and removing the part of the pushing tray, which exceeds the new foundation of the blast furnace.
And S6, constructing a hoop layer on the outer sides of the old foundation and the new foundation of the blast furnace, wherein the hoop layer is of a reinforced concrete structure.
Further, the method comprises the following steps: in the step S3, the outermost layer of steel bars around the new foundation of the blast furnace is not constructed with concrete temporarily; s6, before the anchor ear layer is poured, the reinforcing bars at the upper part of the anchor ear layer are connected with the outermost reinforcing bars around the new foundation of the blast furnace, and the reinforcing bars at the lower part of the anchor ear layer are welded and connected with the original reinforcing bars exposed out of the outer ring of the old foundation; after the anchor ear layer is poured, the old foundation, the new foundation of the blast furnace and the anchor ear layer form a whole.
Further, the method comprises the following steps: the upper surface of the hoop layer is flush with the upper surface of the new foundation of the blast furnace, and the reinforcing bars of the hoop layer are welded with the two sides of the original reinforcing bars exposed out of the outer ring of the old foundation in an overlapping mode.
Specifically, the method comprises the following steps: the thickness of the hoop layer is at least 150mm, and the overlapping length of the hoop layer and the old foundation is not less than 250mm.
And S7, after the blast furnace is aligned without dismantling the blast furnace pushing channel, pouring concrete in the area below the corresponding height of the new foundation of the blast furnace to form a new and old lapped foundation.
Specifically, the method comprises the following steps: the new foundation and the hoop layer of the blast furnace are made of concrete with the same strength as the old foundation.
The invention has the beneficial effects that: the construction period is saved, the foundation construction quality is ensured, and the construction process is simplified. The reinforcing bars of the hoop layer are respectively connected with the original reinforcing bars of the new blast furnace foundation and the original blast furnace foundation, so that the old foundation, the new blast furnace foundation and the hoop layer form a whole, and a stable and safe foundation structure is formed.
Drawings
FIG. 1 is a schematic structural diagram of the basis of the new and old lap joints of the present invention.
Fig. 2 is a structural view of the push pallet of the present invention.
FIG. 3 is a schematic view of the blast furnace structure of the present invention pushed along the blast furnace moving path.
FIG. 4 is a schematic view showing the manner of laying the blast furnace moving path according to the present invention.
Reference numerals: the novel pushing and pushing device comprises an old foundation 1, original reinforcing steel bars 11, a pushing beam 2, a blast furnace pushing channel 3, a steel rail 31, a blast furnace structure 4, a pushing tray 41, a blast furnace new foundation 42, a sliding shoe 43 and a hoop layer 5.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention relates to a new and old foundation lapping method for integrally and horizontally moving a blast furnace, which is used for horizontally moving the new and old foundations to the position of the old blast furnace foundation after the blast furnace is assembled outside a blast furnace line so as to form an integral foundation structure by lapping the new and old foundations, and comprises the following steps of:
s1, chiseling the top of the old foundation 1 of the blast furnace to expose the original steel bars 11 on the outer ring of the old foundation 1. After the top of the old foundation 1 is chiseled, the height of the old foundation 1 is lowered to clear the obstacle of the blast furnace moving passage 3 for the subsequent step S2. In order to allow the old foundation 1 to be better combined with the concrete to be poured later, it is preferable that the top surface and the side walls of the old foundation 1 are also roughened. The exposed length of the original steel bars 11 of the outer ring of the old foundation 1 is based on the requirement that enough steel bars are stably lapped, for example, the exposed length of the original steel bars 11 is 250mm.
S2, constructing a foundation to the position of the old foundation 1 from the position of assembly outside the blast furnace line along the area through which the pushing slides, wherein the top of the foundation is a pushing beam 2. As shown in fig. 4, the foundation adopts a pile foundation, and a push beam 2 is arranged at the top of the pile foundation. A blast furnace pushing channel 3 is constructed on the top of the pushing beam 2, and the blast furnace pushing channel 3 is horizontally arranged and covers the position of off-line assembly, the area through which pushing slides and the position of the old foundation 1. The blast furnace pushing channel 3 is used for hydraulically pushing the sliding blast furnace structure 4. The blast furnace moving passage 3 is directly constructed on the top of the old foundation 1 after chiseling at the position of the old foundation 1. The blast furnace moving walkway 3 comprises a rail 31 and the blast furnace structure 4 is moved along the rail 31 as shown in fig. 3.
And S3, constructing a blast furnace structure 4 at the position assembled outside the blast furnace line. The blast furnace structure 4 includes a pushing tray 41, a new blast furnace foundation 42 constructed on the top of the pushing tray 41, and a blast furnace body constructed on the upper portion of the new blast furnace foundation 42. The bottom of the pushing tray 41 is placed in the blast furnace pushing passage 3 through the sliding shoe 43, and as shown in fig. 2, the pushing tray 41 needs to be pushed hydraulically, so that one side for pushing is provided with a flat straight edge, and the other three sides are arc-shaped edges. The pushing tray 41 is welded with vertical steel bars at intervals along the direction of the circular ring, the circular steel bars are arranged between the vertical steel bars, the blast furnace new foundation 42 is constructed in a space surrounded by the vertical steel bars and the circular steel bars through the vertical steel bars and the circular steel bars, the horizontal section of the blast furnace new foundation 42 is circular, and the blast furnace new foundation 42 is of a reinforced concrete structure.
Because the outside of the new basis 42 of blast furnace still need be under construction reinforced concrete structure, in order to facilitate the better combination with the reinforced concrete structure of follow-up construction, when the new basis 42 of blast furnace is under construction in the position of online equipment, the outermost reinforcing bar around the new basis 42 of blast furnace does not construct the concrete temporarily to be connected the arrangement of reinforcement and the outermost reinforcing bar of the new basis 42 of blast furnace of hooping layer 5 when the hooping layer 5 of follow-up construction.
And S4, after the off-line assembly construction of the blast furnace structure 4 is completed, pushing the blast furnace structure 4 to slide to the position of the old foundation 1, leveling and aligning the blast furnace structure 4, and fixing the pushing tray 41 in the blast furnace pushing passage 3 after the acceptance is passed. For example, the pusher tray 41 is directly welded and fixed to the rail 31, or the pusher tray 41 and the rail 31 are welded and fixed by a steel plate.
And S5, cutting and removing the part of the pushing tray 41 exceeding the new blast furnace foundation 42. The pushing tray 41 is cut to have a circular shape, and an edge of the pushing tray 41 coincides or substantially coincides with an edge of the new blast furnace foundation 42. The portion of pushing tray 41 beyond the new foundation 42 of the blast furnace is cut away in order to leave a place for the subsequent step of constructing the hoop layer 5. The pushing tray 41 is cut and trimmed for subsequent construction.
And S6, constructing a hoop layer 5 on the outer sides of the old foundation 1 and the new blast furnace foundation 42, wherein the hoop layer 5 is of a reinforced concrete structure. The hoop layer 5 firmly connects the old foundation 1 and the new blast furnace foundation 42. The thickness of the hoop layer 5 is determined by calculation based on the force, for example, the thickness of the hoop layer 5 is at least 150mm. The upper surface of the hoop layer 5 is preferably flush with the upper surface of the new blast furnace foundation 42. In order to ensure the structural strength among the old foundation 1, the new blast furnace foundation 42 and the hoop layer 5 are preferably made of concrete with the same strength as the old foundation 1; in addition, in step S3, concrete is not constructed for the outermost reinforcing steel bars around the new blast furnace foundation 42, before the hoop layer 5 is poured, the reinforcing steel bars on the upper portion of the hoop layer 5 are connected with the outermost reinforcing steel bars around the new blast furnace foundation 42, and the reinforcing steel bars on the lower portion of the hoop layer 5 are welded with the original reinforcing steel bars 11 exposed out of the outer ring of the old foundation 1. After the hoop layer 5 is poured, the old foundation 1, the blast furnace new foundation 42 and the hoop layer 5 form a whole.
The reinforcing bars of the hoop layer 5 are preferably welded with the original reinforcing bars 11 exposed out of the outer ring of the old foundation 1 in a double-face lap joint mode, and then the connection strength between the reinforcing bars is guaranteed. For example, the thickness of the hoop layer 5 is 150mm, and the overlapping length of the hoop layer 5 and the old foundation 1 is 250mm.
And S7, pouring concrete in the area below the corresponding height of the new blast furnace foundation 42 to form a new and old lapped foundation after the blast furnace is aligned without dismantling the blast furnace pushing passage 3.
The pushing tray 41, the sliding shoes 43 and the blast furnace pushing channel 3 for pushing are not detached, alignment and acceptance of the blast furnace are completed, after spot welding is firm, the sliding shoes are directly buried in the foundation concrete, and the sliding shoes and the hoop layer 5 are poured together by the flowing grouting material with the same strength as the foundation concrete to form a new and old lapped foundation.
Claims (7)
1. The new and old foundation overlapping method for the whole horizontal transition of the blast furnace is characterized in that: the method comprises the following steps:
s1, chiseling the top of an old foundation (1) of a blast furnace to expose an original steel bar (11) of an outer ring of the old foundation (1);
s2, constructing a foundation to the position of the old foundation (1) from the position of the off-line assembly of the blast furnace along the area through which the pushing slides, wherein the top of the foundation is a pushing beam (2), a blast furnace pushing channel (3) is constructed at the top of the pushing beam (2), and the blast furnace pushing channel (3) is horizontally arranged and covers the position of the off-line assembly, the area through which the pushing slides and the position of the old foundation (1);
s3, constructing a blast furnace structure (4) at an assembled position outside a blast furnace line; the blast furnace structure (4) comprises a pushing tray (41), a new blast furnace foundation (42) constructed on the top of the pushing tray (41), and a blast furnace body constructed on the upper part of the new blast furnace foundation (42); the bottom of the pushing tray (41) is placed in the blast furnace pushing channel (3) through a sliding shoe (43), vertical steel bars are welded to the pushing tray (41) at intervals along the circular ring direction, circular steel bars are arranged among the vertical steel bars, a new blast furnace foundation (42) is constructed in a space surrounded by the circular steel bars, the new blast furnace foundation (42) is of a reinforced concrete structure, and concrete is not constructed on the outermost steel bars around the new blast furnace foundation (42);
s4, pushing the blast furnace structure (4) to slide to the position of the old foundation (1), leveling and aligning the blast furnace structure (4), and fixing the pushing tray (41) on the blast furnace pushing channel (3);
s5, cutting and removing the part of the pushing tray (41) exceeding the new foundation (42) of the blast furnace;
s6, constructing a hoop layer (5) on the outer sides of the old foundation (1) and the new blast furnace foundation (42), wherein the hoop layer (5) is of a reinforced concrete structure, before the hoop layer (5) is poured, reinforcing bars on the upper portion of the hoop layer (5) are connected with the outermost reinforcing bars around the new blast furnace foundation (42), and the reinforcing bars on the lower portion of the hoop layer (5) are welded and connected with the original reinforcing bars (11) exposed out of the outer ring of the old foundation (1); after the hoop layer (5) is poured, the old foundation (1), the blast furnace new foundation (42) and the hoop layer (5) form a whole;
and S7, after the blast furnace pushing channel (3) is not removed and the blast furnace is aligned, pouring concrete in the area below the corresponding height of the new foundation (42) of the blast furnace to form a new and old lapped foundation.
2. The lapping method for the whole horizontally shifted new and old foundation of the blast furnace as claimed in claim 1, wherein: in the step S1, the exposed length of the original steel bar (11) on the outer ring of the old foundation (1) is 250mm.
3. The overlapping method of the new and old foundations of the whole horizontal shift of the blast furnace according to claim 1, characterized in that: step S1 also performs roughening treatment on the top surface and the side wall of the old foundation (1).
4. The lapping method for the whole horizontally shifted new and old foundation of the blast furnace as claimed in claim 1, wherein: in the step S2, the blast furnace pushing channel (3) comprises a steel rail (31); in step S4, the pushing tray 41 is welded and fixed to the rail 31.
5. The lapping method for the old and new foundations of the whole horizontal moving blast furnace as claimed in any one of claims 1 to 4, wherein: the upper surface of the hoop layer (5) is flush with the upper surface of a new blast furnace foundation (42), and the reinforcing bars of the hoop layer (5) are welded with the two sides of the original reinforcing bars (11) exposed out of the outer ring of the old foundation (1) in an overlapping manner.
6. The lapping method of new and old foundations of any one of claims 1 to 4, which is to be horizontally moved as a whole, wherein: the thickness of the hoop layer (5) is at least 150mm, and the overlapping length of the hoop layer (5) and the old foundation (1) is not less than 250mm.
7. The lapping method of new and old foundations of any one of claims 1 to 4, which is to be horizontally moved as a whole, wherein: the new blast furnace foundation (42) and the hoop layer (5) are made of concrete with the same strength as the old foundation (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111438303.8A CN114058750B (en) | 2021-11-30 | 2021-11-30 | Lap joint method for new and old foundations of whole horizontal moving of blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111438303.8A CN114058750B (en) | 2021-11-30 | 2021-11-30 | Lap joint method for new and old foundations of whole horizontal moving of blast furnace |
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| CN114058750B true CN114058750B (en) | 2022-10-14 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB269173A (en) * | 1926-04-08 | 1927-07-28 | John Cockerill Sa | Improved method of hooping stacks of blast furnaces |
| CN1222579A (en) * | 1998-12-02 | 1999-07-14 | 酒泉钢铁(集团)有限责任公司 | Integral shift technology and equipment for overhaul of blast furnace |
| CN204590629U (en) * | 2015-04-30 | 2015-08-26 | 中国十九冶集团有限公司 | Steel pipe column concrete lifting hood type linkage |
| CN105408499A (en) * | 2013-07-30 | 2016-03-16 | 新日铁住金工程技术株式会社 | Blast furnace repair method |
| CN109457073A (en) * | 2018-11-16 | 2019-03-12 | 中冶天工集团有限公司 | A kind of big volume blast furnace assembles passage method offline |
| CN109468420A (en) * | 2018-12-17 | 2019-03-15 | 中冶天工集团有限公司 | A kind of last furnace shell passage segmentation hydraulic synchronizing lifting assemble method |
-
2021
- 2021-11-30 CN CN202111438303.8A patent/CN114058750B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB269173A (en) * | 1926-04-08 | 1927-07-28 | John Cockerill Sa | Improved method of hooping stacks of blast furnaces |
| CN1222579A (en) * | 1998-12-02 | 1999-07-14 | 酒泉钢铁(集团)有限责任公司 | Integral shift technology and equipment for overhaul of blast furnace |
| CN105408499A (en) * | 2013-07-30 | 2016-03-16 | 新日铁住金工程技术株式会社 | Blast furnace repair method |
| CN204590629U (en) * | 2015-04-30 | 2015-08-26 | 中国十九冶集团有限公司 | Steel pipe column concrete lifting hood type linkage |
| CN109457073A (en) * | 2018-11-16 | 2019-03-12 | 中冶天工集团有限公司 | A kind of big volume blast furnace assembles passage method offline |
| CN109468420A (en) * | 2018-12-17 | 2019-03-15 | 中冶天工集团有限公司 | A kind of last furnace shell passage segmentation hydraulic synchronizing lifting assemble method |
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| CN114058750A (en) | 2022-02-18 |
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