CN104727339A - Electrical equipment foundation two-step type construction method - Google Patents
Electrical equipment foundation two-step type construction method Download PDFInfo
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- CN104727339A CN104727339A CN201510146776.9A CN201510146776A CN104727339A CN 104727339 A CN104727339 A CN 104727339A CN 201510146776 A CN201510146776 A CN 201510146776A CN 104727339 A CN104727339 A CN 104727339A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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Abstract
The invention discloses an electrical equipment foundation two-step type construction method used for construction of an electrical equipment foundation. The method includes the processes of foundation lower body construction and embedded part foundation construction. The foundation lower body construction includes the following steps that A1, a foundation pit slot of electrical equipment is dug, and a foundation reinforcement frame is placed in the foundation pit slot; A2, the connecting mode of the equipment is designed, and anti-drawing connection or common connection is designed according to actual requirements. The embedded part foundation construction includes the following steps that A3, concrete is poured into the foundation pit slot for the first time, and joint preformed holes are reserved; B1, the specific positions of embedded parts are determined; B2, embedded part anchor bars are arranged according to actual requirements; B3, concrete is poured for the second time. The accuracy and the flatness technological level of main electrical equipment embedded parts of a transformer substation can be improved, the degree of dependence of construction on manufacturer data is reduced, and the construction time of the equipment foundation embedded parts is shortened.
Description
Technical field
The present invention relates to the construction method, particularly a kind of construction for power equipment basis on basis.
Background technology
In China's power construction, electric equipments such as main transformer, GIS/HGIS power distribution equipment etc. have that build is large, the feature such as load is heavy, basic embedded part is many, strict to the planeness of equipment basic pre-buried, positioning accuracy request.The many employings of conventional base embedded part construction technology by embedded part after the location leveling of basic end face, whole way of watering together with basis again, its idiographic flow is for after plant equipment data puts in place, carry out embedded part design and foundation pattern design, carry out the work such as basic excavation, cushion construction, reinforcing bar binding, embedded part location, template support, the maintenance of concrete monobloc cast, completion acceptance subsequently successively.
But this disposable mode completing construction is usually subject to equipment vendors' physical resource and the embedded part situation that puts in place restricts, if manufacturer information is complete or embedded part is not in place, just cannot constructs, delay the duration.Because power equipment type is many, more than bid batch, the reason such as construction period is more nervous, conventional embedded part technique is subject to various factors restriction, the more difficult requirement meeting workmanship and progress.Therefore, for better meeting power engineering construction quality and schedule requirement, in power engineering construction, take a kind of novel rational design technology project to seem particularly important and urgent.
Summary of the invention
The technical issues that need to address of the present invention are to provide the construction method on power equipment basis, and Reasonable adjustment job order, shortens the equipment set-up time.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Power equipment basis two-step construction method, comprise basic infrastructure main body construction and the construction of embedded part part basis, basic infrastructure main body comprises foundation pit groove, basic infrastructure concrete and reinforcement foundation framework, and basic infrastructure main body construction comprises the following steps,
A1, shape and size according to power equipment basis in engineering in the past, dig the foundation pit groove of power equipment, place reinforcement foundation framework in foundation pit groove;
The connected mode on A2, design power equipment and basis, when 80% or the basis of power equipment pulling out load and be greater than power equipment own wt, when producing tensile stress, arrange anti-punching shear bar in foundation pit groove; In other situations, adopt generic connectivity mode;
A3, in foundation pit groove cast first time concrete, and spare interface preformed hole: when all embedded part cross-sectional areas are greater than 10% of basic top surface area, first time pouring concrete end face 0.3m lower than the end face of reinforcement foundation framework, first time, pouring concrete end face entirety was as interface preformed hole; When all embedded part cross-sectional areas are less than or equal to 10% of basic top surface area, the end face of first time pouring concrete end face arrival reinforcement foundation framework, 0.3 meter of dark interface preformed hole is set, the edge 300mm ~ 600mm wider than required access embedded part edge of interface preformed hole needing to access the position of embedded part;
The construction of embedded part part basis comprises the following steps,
B1, embedded part are located, the exact position of become more meticulous to embedded part location, measurement and correction built-in fitting;
B2, embedded part access, access embedded part dowel, and when adopting anti-punching shear bar in steps A 2, embedded part dowel adopts curved anchor pattern tension dowel, and is connected with the anti-punching shear bar spot welding described in steps A 2 by embedded part dowel; When adopting generic connectivity to design in steps A 2, embedded part dowel adopts the common dowel of straight anchor pattern, embedded part is arranged on first time pouring concrete end face;
B3, second time fluid concrete, on power equipment basis, embedded part installs, then on first time pouring concrete end face fluid concrete within the scope of 0.3m.
Further improvement of the present invention is: the anti-punching shear bar described in steps A 2 is HPB300 reinforcing bar, and diameter is 6 ~ 10cm, and setting space is 150 ~ 300mm.
Further improvement of the present invention is: the common dowel of straight anchor pattern described in step B1 is that corner point type supports straight anchor dowel, and the anchorage length in concrete secondary LIFT is 250 ~ 290mm; Described curved anchor pattern tension dowel is 8 equidistant curved anchor dowels, and the anchorage length in concrete secondary LIFT is 40 times of bar diameters.
Further improvement of the present invention is: the concrete that in step B3, second time fluid concrete is used is the C30 pea gravel concreten of interpolation 0.08% ~ 0.10% anti-crack fiber.
Owing to adopting technique scheme, the beneficial effect that the present invention produces is:
Power equipment basis of the present invention two-step construction method can improve precision and the planeness technological level of transformer station's main electric power equipment built-in fitting, the basic infrastructure main body constructions such as foundation trench excavation, concreting, backfill compaction are not by the restriction of Bidding Invition, producer's data, reduce the degree of dependence of construction to producer's data, can go into operation in advance by optimized integration, save the duration, reduce construction costs.
Basic infrastructure main body construction of the present invention and embedded part part basis are constructed the separately construction of two steps, Reasonable adjustment job order, if basic infrastructure main body construction can be constructed in advance when equipment embedded part does not put in place, by the time equipment embedded part carries out embedded part construction after putting in place again, improve operating efficiency, can not some difficultly affect progress because of equipment grade not in place, avoid scene " work holdup " phenomenon, reduce engineering cost.
First time pouring concrete end face of the present invention 0.3m lower than the end face of reinforcement foundation framework, can ensure to bury space underground for distinct device provides reserved, even if make certain adjustment when embedded part is constructed to embedded part position also can ensure to bury underground, improve the compatibility of basic infrastructure main body, based on sub-body construction can construct in advance and provide guarantee.
Anti-punching shear bar of the present invention can strengthen the intensity of basic infrastructure main body, improves the stability on basis, the infringement that the active force that minimizing is pulled out brings equipment Foundations.
Tension dowel of the present invention can bear the uplift force of equipment, improves the connective stability of embedded part and plant bottom case,
The heat of hydration that concrete second pouring can effectively avoid concrete in mass to produce, avoids the generation of external crack.And due to the concrete scale of construction less, better can control construction quality, reach the requirement of clear-water concrete, improve the planeness becoming power equipment built-in fitting.
Accompanying drawing explanation
Fig. 1 is steps flow chart schematic diagram of the present invention;
Foundation structure schematic diagram in Fig. 2 basic infrastructure main body construction of the present invention process;
Fig. 3 the present invention walks foundation structure schematic diagram in embedded part part basis work progress processed;
In the accompanying drawings: 1, foundation pit groove, 2, first time pouring concrete end face, 3, reinforcement foundation framework, 4, second time pouring concrete end face, 5, embedded part, 6, embedded part dowel.
Detailed description of the invention
Power equipment basis two-step construction method, comprise basic infrastructure main body construction and the construction of embedded part part basis, basic infrastructure main body comprises foundation pit groove 1, basic infrastructure concrete and reinforcement foundation framework 3, and basic infrastructure main body construction comprises the following steps,
A1, shape and size according to this power equipment basis in engineering in the past, dig the foundation pit groove 1 of this power equipment, placement reinforcement foundation framework 3 foundation pit groove 1 in;
The connected mode of A2, designing apparatus, when equipment pulling out when load is greater than 80% of equipment own wt, anti-punching shear bar is set in foundation pit groove 1, when equipment is easily subject to earthquake, wind effect substrate generation tensile stress, in foundation pit groove 1, also anti-punching shear bar is set; In other situations, anti-punching shear bar is not set, adopts generic connectivity design;
A3, in foundation pit groove 1 first time fluid concrete, design interface preformed hole: when all embedded part 5 cross-sectional areas are greater than 10% of basic top surface area, first time pouring concrete end face 2 0.3m lower than the end face of reinforcement foundation framework 3, first time, pouring concrete end face 2 entirety was as interface preformed hole; When all embedded part 5 cross-sectional areas are less than or equal to 10% of basic top surface area, pouring concrete end face 2 is higher than the end face of reinforcement foundation framework 3 for the first time, 0.3 meter of dark interface preformed hole is set, the edge 300mm ~ 600mm wider than required access embedded part 5 edge of interface preformed hole needing to access the position of embedded part 5; First time pouring concrete end face 2 0.3m lower than the end face of reinforcement foundation framework 3, can ensure to bury space underground for distinct device provides reserved, space is imbedded in the reserved of some equipment needs at least 0.1 meter, what some equipment needed 0.2 meter reservedly imbeds space, even if reserved 0.3 meter ensures that making certain adjustment when embedded part is constructed to embedded part 5 position also can ensure to bury underground, improve the compatibility of basic infrastructure main body, based on sub-body construction can construct in advance and provide guarantee
Embedded part construction comprises the following steps,
B1, embedded part are located, the exact position of become more meticulous to embedded part 5 location, repeated measurement and correction built-in fitting 5;
B2, embedded part access, access embedded part dowel 6, and when adopting anti-punching shear bar in steps A 2, embedded part dowel 6 adopts curved anchor pattern tension dowel, and is connected with the anti-punching shear bar spot welding described in steps A 2 by embedded part dowel 6; When adopting generic connectivity to design in steps A 2, embedded part dowel 6 adopts the common dowel of straight anchor pattern, embedded part 5 is placed on pouring concrete end face 2 for the first time;
B3, second time fluid concrete, on power equipment basis, embedded part 5 installs, then to carry out on first time pouring concrete end face 2 fluid concrete within the scope of 0.3m.
Anti-punching shear bar described in steps A 2 is HPB300 reinforcing bar, and diameter is 6 ~ 10cm, and setting space is 150 ~ 300cm.
The common dowel of straight anchor pattern described in step B1 is that corner point type supports straight anchor dowel, and the anchorage length in concrete secondary LIFT is 250 ~ 290mm; Described curved anchor pattern tension dowel is 8 equidistant curved anchor dowels, and the anchorage length in concrete secondary LIFT is 40 times of bar diameters.
The concrete that in step B3, second time fluid concrete is used is the C30 pea gravel concreten of interpolation 0.08% ~ 0.10% anti-crack fiber.
Below in conjunction with embodiment, the present invention is described in further details:
Embodiment 1
The basic built-in fitting work progress of 500KVGIS outgoing line interval comprises the following steps,
Basic infrastructure main body construction comprises the following steps,
A1, can determine 500KVGIS outgoing line interval width about 2.7 meters according to the appearance and size of 500KVGIS outgoing line interval in similar engineering in the past, the foundation pit groove 1 digging this power equipment is about 3 meters, placement reinforcement foundation framework 3 foundation pit groove 1 in;
The connected mode of A2, design 500KVGIS outgoing line interval, 500KVGIS outgoing line interval pulls out load is greater than equipment own wt 80%, in foundation pit groove 1, anti-punching shear bar is set;
A3, in foundation pit groove 1 first time fluid concrete, design interface preformed hole: the embedded part cross-sectional area of 500KVGIS outgoing line interval is greater than 10% of basic top surface area, so first time pouring concrete end face 2 0.3m lower than the end face of reinforcement foundation framework 3, first time, pouring concrete end face 2 entirety was as interface preformed hole;
Embedded part construction comprises the following steps,
B1, embedded part are located, and to become more meticulous location to the embedded part 5 of 500KVGIS outgoing line interval, measure and the exact position of correction built-in fitting 5, first time pouring concrete end face built-in fitting 5 is reserved position;
B2, embedded part access, and in 500KVGIS outgoing line interval, embedded part 5 adopts resistance to plucking dowel, and embedded part dowel 6 adopts curved anchor pattern tension dowel, and is connected with the anti-punching shear bar spot welding described in steps A 3;
B3, fluid concrete, on 500KVGIS outgoing line interval basis, built-in fitting 5 installs, and through electric specialty personnel and supervising engineer confirm errorless after, then to carry out on first time pouring concrete end face fluid concrete within the scope of 0.3m.
Embodiment 2
The basic built-in fitting work progress at 500KVGIS bus interval comprises the following steps,
Basic infrastructure main body construction comprises the following steps,
A1,500KVGIS bus interval shape and size can be determined according to the appearance and size of 500KVGIS outgoing line interval in similar engineering in the past, dig the foundation pit groove 1 of this power equipment, placement reinforcement foundation framework 3 foundation pit groove 1 in;
The connected mode at A2, design 500KVGIS bus interval, 500KVGIS bus interval is pulled out load is less than equipment own wt 80%, in foundation pit groove 1, anti-punching shear bar is not set, adopts generic connectivity mode;
A3, in foundation pit groove 1 first time fluid concrete, design interface preformed hole: embedded part 5 cross-sectional area at 500KVGIS bus interval is less than 10% of basic top surface area, so first time pouring concrete end face 2 higher than the low 0.3m of end face of reinforcement foundation framework 3,0.3 meter of dark interface shrinkage pool is set in the position of required spare interface, it is wide that embedded part 5 size is about the long 200mm of 700mm, the size 500mm wider than 500KVGIS bus interval embedded part of interface preformed hole, namely long is 1200mm, and wide is 700mm
Embedded part construction comprises the following steps,
B1, embedded part are located, and to become more meticulous location to the embedded part at 500KVGIS bus interval, measure and the exact position of correction built-in fitting, first time pouring concrete end face 2 built-in fitting 5 is reserved position
B2, embedded part access, and when in 500KVGIS bus interval, embedded part adopts generic connectivity to design, embedded part dowel 6 adopts the common dowel of straight anchor pattern, the embedded part at 500KVGIS bus interval are placed on pouring concrete end face 2 for the first time;
B3, fluid concrete, complete at 500KVGIS bus interval basis installation of embedded parts, and through electric specialty personnel and supervising engineer confirm errorless after, then to carry out on basic end face fluid concrete within the scope of 0.3m.
Precision and the planeness technological level that can improve transformer station's main electric power equipment built-in fitting of the present invention, the basic infrastructure main body constructions such as foundation trench excavation, concreting, backfill compaction are not by the restriction of Bidding Invition, producer's data, reduce the degree of dependence of construction to producer's data, can go into operation in advance by optimized integration, save the duration, reduce construction costs.
Claims (4)
1. power equipment basis two-step construction method, it is characterized in that: comprise basic infrastructure main body construction and the construction of embedded part part basis, basic infrastructure main body comprises foundation pit groove (1), basic infrastructure concrete and reinforcement foundation framework (3), and basic infrastructure main body construction comprises the following steps
A1, shape and size according to power equipment basis in engineering in the past, dig the foundation pit groove (1) of power equipment, placement reinforcement foundation framework (3) foundation pit groove (1) in;
The connected mode on A2, design power equipment and basis, when 80% or the basis of power equipment pulling out load and be greater than power equipment own wt, when producing tensile stress, arrange anti-punching shear bar in foundation pit groove (1); In other situations, adopt generic connectivity mode;
A3, in foundation pit groove (1) cast first time concrete, and spare interface preformed hole: when all embedded parts (5) cross-sectional area is greater than 10% of basic top surface area, first time pouring concrete end face (2) 0.3m lower than the end face of reinforcement foundation framework (3), first time pouring concrete end face (2) is overall as interface preformed hole; When all embedded parts (5) cross-sectional area is less than or equal to 10% of basic top surface area, the end face of first time pouring concrete end face (2) arrival reinforcement foundation framework (3), needing the position accessing embedded part (5), 0.3 meter of dark interface preformed hole is set, the edge 300mm ~ 600mm wider than required access embedded part edge of interface preformed hole;
The construction of embedded part part basis comprises the following steps,
B1, embedded part are located, the exact position of become more meticulous to embedded part (5) location, measurement and correction built-in fitting (5);
B2, embedded part access, access embedded part dowel (6), and when adopting anti-punching shear bar in steps A 2, embedded part dowel (6) adopts curved anchor pattern tension dowel, and is connected with the anti-punching shear bar spot welding described in steps A 2 by embedded part dowel (6); When adopting generic connectivity to design in steps A 2, embedded part dowel (6) adopts the common dowel of straight anchor pattern, embedded part (5) is arranged on first time pouring concrete end face (2);
B3, second time fluid concrete, on power equipment basis, embedded part installs, then goes up fluid concrete within the scope of 0.3m in first time pouring concrete end face (2).
2. power equipment basis according to claim 1 two-step construction method, it is characterized in that: the anti-punching shear bar described in steps A 2 is HPB300 reinforcing bar, diameter is 6 ~ 10cm, and setting space is 150 ~ 300mm.
3. power equipment basis according to claim 1 two-step construction method, is characterized in that: the common dowel of straight anchor pattern described in step B1 is that corner point type supports straight anchor dowel, and the anchorage length in concrete secondary LIFT is 250 ~ 290mm; Described curved anchor pattern tension dowel is 8 equidistant curved anchor dowels, and the anchorage length in concrete secondary LIFT is 40 times of bar diameters.
4. power equipment basis according to claim 1 two-step construction method, is characterized in that: the concrete that in step B3, second time fluid concrete is used is the C30 pea gravel concreten of interpolation 0.08% ~ 0.10% anti-crack fiber.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106759455A (en) * | 2016-12-05 | 2017-05-31 | 国网青海省电力公司西宁供电公司 | A kind of method of indoor power Equipment Foundations periphery terrace anti-freeze expansion |
| CN107700520A (en) * | 2017-09-01 | 2018-02-16 | 南阳理工学院 | A kind of anti-corrosion architectural electricity cabinet construction installation method |
| CN108867686A (en) * | 2017-07-24 | 2018-11-23 | 武汉炼化工程设计有限责任公司 | A kind of pump foundation secondary grout layer anti-drop structure and its casting process |
| CN111287212A (en) * | 2020-02-15 | 2020-06-16 | 广州市芳村建筑工程有限公司 | Two-step construction method for power equipment foundation |
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| CN111287212A (en) * | 2020-02-15 | 2020-06-16 | 广州市芳村建筑工程有限公司 | Two-step construction method for power equipment foundation |
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| CN104727339B (en) | 2016-07-06 |
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Address after: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee after: China Electric Power Construction Group Hebei electric survey and Design Research Institute Co., Ltd. Address before: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee before: Hebei Province Power Surveying Design & Research Institute |