CN113897999B - Construction method for constructing elevator foundation structure on subway upper cover project - Google Patents
Construction method for constructing elevator foundation structure on subway upper cover project Download PDFInfo
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- CN113897999B CN113897999B CN202111292855.2A CN202111292855A CN113897999B CN 113897999 B CN113897999 B CN 113897999B CN 202111292855 A CN202111292855 A CN 202111292855A CN 113897999 B CN113897999 B CN 113897999B
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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Abstract
A construction method for constructing an elevator foundation structure for a subway upper cover project comprises the following steps: designing a drawing of a foundation structure of a subway upper cover project construction elevator through three-dimensional software; chiseling the subway cover plate beam at the corresponding position, exposing beam gluten, and cleaning chiseled gravels; welding a stirrup of the newly added lengthened main beam on the beam gluten; finishing the binding of each newly added lengthened main beam, each newly added superposed secondary beam and the steel bars for constructing the surface structure of the elevator, and sealing the side surfaces and the bottom surface of the newly added lengthened main beam and the newly added superposed secondary beam; pre-burying a construction elevator embedded part, and then pouring; and maintaining the foundation structure of the construction elevator after pouring is finished, and dismantling the side mold after the requirement is met. The novel lengthened main beam is connected in a superposed beam mode, and the novel superposed secondary beam is additionally arranged, so that the span of the foundation plate is reduced, the condition that the steel bearing plate is used as a template support is met, and the condition that the cover plate structure is cracked due to the fact that load is transmitted to the cover plate of the subway application warehouse is avoided.
Description
Technical Field
The invention relates to the technical field of construction elevator foundation structures, in particular to a construction method of an elevator foundation structure constructed by a subway upper cover project.
Background
At present, city construction is developed rapidly, and the demand for underground space is more and more, so that more and more new projects are subway upper cover projects. However, because the construction working face of the subway upper cover project is on the top plate of the subway application garage, no basement is available for the construction elevator to return to the top. Consequently, the face of subway application storehouse roof is difficult to bear the load of construction elevator, and this causes the puzzlement for construction elevator's installation, if still direct mount on the face of subway application storehouse roof, can destroy its face structure, can cause the safety in production accident even.
Disclosure of Invention
The invention provides a construction method of a subway upper cover project construction elevator foundation structure, which aims to overcome the defects that the load of a construction elevator is difficult to bear by the surface of a top plate of an existing subway application warehouse, the installation of the construction elevator is disturbed, and the like.
The invention adopts the following technical scheme:
a construction method for constructing an elevator foundation structure for a subway upper cover project comprises the following steps:
1) Designing a drawing of a subway upper cover project construction elevator foundation structure through three-dimensional software according to the position of a construction elevator foundation and by combining the structure of a subway application warehouse cover plate beam;
2) Obtaining the position of the newly added lengthened main beam through the step 1), chiseling the subway cover plate beam at the corresponding position, exposing beam gluten, and cleaning chiseled broken stones;
3) Welding a hoop of the newly added lengthened main beam on the Liang Mianjin in the step 2);
4) Finishing the binding of each newly added lengthened main beam, each newly added superposed secondary beam and the steel bars for constructing the surface structure of the elevator, and sealing the side surfaces and the bottom surface of the newly added lengthened main beam and the newly added superposed secondary beam;
5) Pre-burying the pre-buried part of the construction elevator, and then pouring;
6) And maintaining the foundation structure of the construction elevator after pouring is finished, and removing the side mold after the requirements are met.
In a preferred embodiment, the following steps are further included between step 1) and step 2): and (3) importing the drawing designed in the step 1) into finite element software for stress analysis, and comparing the drawing with the maximum stress value of each subway cover plate beam to obtain the optimal subway upper cover project construction elevator foundation structure.
In a preferred embodiment, the finite element software is ANSYS simulation software.
In an embodiment of a preferred, construction elevator foundation structure includes subway apron roof beam, newly-increased extension girder, newly-increased coincide secondary beam and construction elevator face, subway apron roof beam includes two at least and the interval sets up, and every subway apron roof beam top fluting makes the roof beam face muscle expose, and a fixedly connected with newly-increased extension girder on the roof beam gluten at every subway apron roof beam top respectively, be connected with a plurality of newly-increased coincide secondary beams between the newly-increased extension girder, the top surface of novel coincide secondary beam with the top surface of novel extension girder is in same horizontal plane, has the interval between the bottom surface of novel coincide secondary beam and the subway apron top surface, construction elevator face is fixed in newly-increased extension girder reaches on the top surface of newly-increased coincide secondary beam.
In a preferred embodiment, the subway cover plate beams comprise three and parallel beams, a newly-added elongated main beam is fixedly connected to the beam gluten at the top of each subway cover plate beam in parallel, and a plurality of newly-added superposed secondary beams which are intersected or arranged in parallel are arranged between every two adjacent newly-added elongated main beams.
In a preferred embodiment, the subway cover plate beam comprises three, two of the three are arranged in parallel and are perpendicular to the other, a newly added elongated main beam is fixedly connected to the beam gluten at the top of each subway cover plate beam respectively, two of the newly added elongated main beams form a cross structure, the other newly added elongated main beam is positioned on one quadrant of the cross structure, a plurality of newly added superposed secondary beams are arranged between the newly added elongated main beam and the newly added elongated main beam parallel to the newly added elongated main beam, and the other three quadrants of the cross structure are correspondingly connected with the newly added superposed secondary beams respectively.
In a preferred embodiment, the height of the newly-added long main beam is 800mm, and the length of the newly-added long main beam is not more than 8000mm; the height and the width of the newly-added superposed secondary beam are 600mm and 650mm respectively.
In a preferred embodiment, the newly-added long main beam and the side surface of the construction elevator plate surface structure adopt a permanent formwork support, and the bottom of the plate adopts a steel bearing plate support; and the bottom of the newly added superposed secondary beam is used as a bottom die in a sand filling mode.
In a preferred embodiment, a high-pressure water gun is used for washing sand filling at the bottom of the newly added superposed secondary beam to complete seam separation.
From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:
1. according to the construction method, the newly-added lengthened main beam is connected in a superposed beam mode, the newly-added superposed secondary beam is additionally arranged, the span of the foundation plate is reduced, the condition that a steel bearing plate is used as a formwork support is met, the advantage that the steel bearing plate does not need to be supported by a vertical rod is utilized, and the condition that the cover plate structure is cracked due to the fact that load is transmitted to the cover plate of the subway application warehouse is avoided.
2. According to the construction method, the design drawing of the three-dimensional software is led into the finite element software for stress analysis, so that on one hand, the stress of each subway cover plate beam is not more than the maximum stress value, on the other hand, the size or the connection position of each newly added lengthened main beam and each newly added superposed secondary beam can be adjusted, the stress among the subway cover plate beams is balanced, the subway cover plate beams are stabilized within a certain range as far as possible, and the service life of the subway cover plate beams is ensured.
3. The newly-added superposed secondary beam adopts a seam-removing technology, so that the load borne by the construction elevator foundation is only transmitted to the superposed main beam and then transmitted to the subway cover plate beam structure through the superposed main beam, the load borne by the subway cover plate surface is avoided, the use of the construction elevator with the main structure can be met, and the field progress is ensured under the condition of ensuring the safety of the whole structure.
Drawings
Fig. 1 is a schematic structural view of a foundation structure of a construction elevator according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of the newly added extension main beam and the subway cover plate beam.
Fig. 3 is a schematic structural diagram of the newly added composite secondary beam of the present invention.
Fig. 4 is a schematic structural view of a second embodiment of the foundation structure of the construction elevator of the present invention.
Fig. 5 is a schematic structural diagram of a third embodiment of the foundation structure of the construction elevator of the invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details. Well-known components, methods and processes are not described in detail below.
A construction method for constructing an elevator foundation structure on a subway upper cover project comprises the following steps:
(1) Designing a subway upper cover project construction elevator foundation structure drawing through three-dimensional software according to the position of a construction elevator foundation and by combining the structure of a subway application warehouse cover plate beam;
(2) Obtaining the position of the newly added lengthened main beam through the step (1), chiseling the subway cover plate beam at the corresponding position, exposing beam gluten, and cleaning chiseled broken stones;
(3) Welding a hoop of the newly added lengthened main beam on the Liang Mianjin in the step (2);
(4) Finishing the binding of each newly added lengthened main beam, each newly added superposed secondary beam and the steel bars for constructing the surface structure of the elevator, and sealing the side surfaces and the bottom surface of the newly added lengthened main beam and the newly added superposed secondary beam;
(5) Pre-burying the embedded part of the construction elevator, and then pouring;
(6) And maintaining the foundation structure of the construction elevator after pouring is finished, and dismantling the side mold after the requirement is met.
The method also comprises the following steps between the step (1) and the step (2): and (3) importing the drawing designed in the step (1) into finite element software for stress analysis, and comparing the drawing with the maximum stress value of each subway cover plate beam to obtain the optimal subway upper cover project construction elevator foundation structure. The finite element software preferably uses ANSYS simulation software.
The stress analysis is carried out through finite element software, the stress of each subway cover plate beam can be ensured not to exceed the maximum bearing capacity of the subway cover plate beam, and on the other hand, the size or the connection position of each newly added lengthened main beam and each newly added superposed secondary beam can be adjusted to balance the stress between the subway cover plate beams, so that the subway cover plate beams are stabilized in a certain range as far as possible, and the service life of the subway cover plate beams is ensured.
Permanent formwork supporting is adopted for the newly added lengthened main beam, the newly added superposed secondary beam and the side face of the construction elevator plate surface structure; the plate bottom of the newly added lengthened main beam adopts a steel bearing plate formwork, and the bottom of the newly added superposed secondary beam adopts a sand filling mode as a bottom formwork.
Three specific embodiments of the present invention for constructing an elevator substructure are as follows.
Example one
Referring to fig. 1, the foundation structure of the construction elevator of the present invention includes a subway slab beam 1, a newly added elongated main beam 10, a newly added superposed secondary beam 20, and a construction elevator slab 30. The subway cover plate beam 1 of the embodiment includes four subway cover plate beams, wherein three subway cover plate beams 1 are arranged in parallel, and the other subway cover plate beam 1 is respectively perpendicular to the other three subway cover plate beams 1. The beam gluten at the top of each subway cover plate beam 1 is fixedly connected with a newly-added long main beam 10 in parallel. The height of the newly added lengthened main beam 10 is 800mm, and the maximum length is not more than 8000mm.
Referring to fig. 1, a plurality of newly-added overlapped secondary beams 20 which are intersected or staggered are connected between every two adjacent newly-added lengthened main beams 10, and the height and the width of each newly-added overlapped secondary beam 20 are 600mm and 650mm respectively.
The top surface of above-mentioned novel coincide secondary beam 20 and the top surface of novel extension girder 10 are in same horizontal plane, have the interval between the bottom surface of novel coincide secondary beam 20 and the 2 top surfaces of subway apron, and construction elevator face 30 is fixed in on the top surface of newly-increased extension girder 10 and newly-increased coincide secondary beam 20.
Specifically, referring to fig. 2, the stirrups of the newly added lengthened main beam 10 include a main beam bottom rib 101, a main beam waist rib 102, and a main beam gluten 103, wherein the bottom rib 101 is fixedly connected with the beam surface rib of the floor slab beam 1 by a single-side welding method. Referring to fig. 3, the stirrup of the newly added composite secondary beam 20 includes a secondary beam bottom rib 201, a secondary beam waist rib 202 and a secondary beam rib 203, and the secondary beam waist rib 202 is also fixedly connected with the primary beam waist rib 102 by a single-side welding method. Be equipped with between the bottom below of secondary beam bottom muscle 201 and the subway apron 2 and fill out sand 3, the steel bearer plate reinforcing bar anchor of construction elevator face 30 is in newly-increased coincide secondary beam 20.
An acute angle is formed between the long edge of the construction elevator plate surface 30 and the central axis of the subway cover plate beam 1, so that the whole construction elevator plate surface 30 covers a plurality of subway cover plate beams 1 as much as possible, and the stress of each subway cover plate beam 1 is reduced.
Example two
Referring to fig. 4, the number of the subway cover plate beams 1 corresponding to the position of the foundation structure of the construction elevator in this embodiment is relatively small, so the number of the subway cover plate beams 1 in this embodiment is three, two of the subway cover plate beams are arranged in parallel and are perpendicular to the other subway cover plate beam, a newly added elongated main beam 10 is fixedly connected to a beam gluten at the top of each subway cover plate beam 1 respectively, two of the newly added elongated main beams 10 form a cross structure, the other newly added elongated main beam 10 is located in one of quadrants of the cross structure, a plurality of newly added superposed secondary beams 20 are arranged between the newly added elongated main beam 10 and the newly added elongated main beam 10 parallel thereto, and the other three quadrants of the cross structure are correspondingly connected to one newly added superposed secondary beam 20 respectively. The construction elevator plate surface 30 is fixed on the top surfaces of the newly added lengthened main beam 10 and the newly added superposed secondary beam 20.
EXAMPLE III
Referring to fig. 5, a set of rectangular subway cover plate beam structures is arranged below the foundation structure of the construction elevator in the embodiment, but one corner of the foundation structure of the construction elevator protrudes out more. Therefore, the subway cover plate beam of the embodiment includes, in addition to four subway cover plate beams 1 forming a rectangular structure, one subway cover plate beam 1 located beside the rectangular structure, and one newly added elongated main beam 10 is respectively and fixedly connected above each subway cover plate beam 1, wherein the four newly added elongated main beams 10 form a rectangular structure, and the other one is located outside the rectangle. A plurality of newly-added overlapped secondary beams 20 which are distributed in parallel at intervals are fixed in parallel in the four newly-added lengthened main beams 10 which form a rectangular structure, and a plurality of intersected newly-added overlapped secondary beams 20 are fixed between the newly-added lengthened main beam 10 outside the rectangle and the newly-added lengthened main beam 10 nearest to the newly-added lengthened main beam. Construction elevator face 30 is fixed in the newly-increased extension girder 10 of rectangle structure and inside newly-increased coincide secondary beam 20 top, and one of them corner then is fixed in on the outside crossing novel coincide secondary beam 20 of rectangle.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (6)
1. A construction method for constructing an elevator foundation structure for a subway upper cover project is characterized by comprising the following steps:
1) Designing a drawing of a subway upper cover project construction elevator foundation structure through three-dimensional software according to the position of a construction elevator foundation and by combining the structure of a subway application warehouse cover plate beam;
2) Obtaining the position of the newly added lengthened main beam through the step 1), chiseling the subway cover plate beam at the corresponding position, exposing beam gluten, and cleaning chiseled broken stones;
3) Welding a hoop of the newly added lengthened main beam on the Liang Mianjin in the step 2);
4) Finishing the binding of each newly added lengthened main beam, each newly added superposed secondary beam and the steel bars for constructing the surface structure of the elevator, and sealing the side surfaces and the bottom surface of the newly added lengthened main beam and the newly added superposed secondary beam;
5) Pre-burying the pre-buried part of the construction elevator, and then pouring;
6) Maintaining the foundation structure of the construction elevator after pouring is finished, and dismantling the side mold after the requirement is met;
the construction elevator foundation structure comprises at least two subway cover plate beams, newly-increased lengthening main beams, newly-increased superposed secondary beams and a construction elevator plate surface, wherein the at least two subway cover plate beams are arranged at intervals, a groove is formed in the top of each subway cover plate beam to expose beam surface ribs, the beam ribs on the top of each subway cover plate beam are fixedly connected with one newly-increased lengthening main beam respectively, a plurality of newly-increased superposed secondary beams are connected between the newly-increased lengthening main beams, the top surfaces of the novel superposed secondary beams and the top surface of the novel lengthened main beam are positioned on the same horizontal plane, a space is reserved between the bottom surface of the novel superposed secondary beam and the top surface of the subway cover plate, and the construction elevator plate surface is fixed on the top surfaces of the newly-increased lengthening main beams and the newly-increased superposed secondary beams;
the newly-added long main beam and the side surface of the construction elevator plate surface structure adopt a permanent template formwork, and the plate bottom adopts a steel bearing plate formwork; the bottom of the newly added superposed secondary beam is used as a bottom die in a sand filling mode;
and (5) washing the bottom of the newly added superposed secondary beam with sand by using a high-pressure water gun to complete joint removal.
2. The construction method of the foundation structure of the subway upper cover project construction elevator as claimed in claim 1, characterized in that: the method also comprises the following steps between the step 1) and the step 2): and (3) importing the drawing designed in the step 1) into finite element software for stress analysis, and comparing the drawing with the maximum stress value of each subway cover plate beam to obtain the optimal subway upper cover project construction elevator foundation structure.
3. The construction method of the foundation structure of the subway upper cover project construction elevator as claimed in claim 2, characterized in that: the finite element software is ANSYS simulation software.
4. The construction method of the foundation structure of the subway upper cover project construction elevator as claimed in claim 1, characterized in that: the subway apron roof beam includes three and parallel arrangement, and parallel fixedly connected with increases the extension girder on the roof beam gluten at every subway apron roof beam top respectively, is equipped with a plurality of crossing or parallel arrangement's increase coincide secondary beam between every two adjacent increase extension girders.
5. The construction method of the foundation structure of the subway upper cover project construction elevator as claimed in claim 1, characterized in that: the subway cover plate beam comprises three subway cover plate beams, wherein two of the three subway cover plate beams are arranged in parallel and are perpendicular to the other subway cover plate beam, a newly-added lengthened main beam is fixedly connected to a beam gluten on the top of each subway cover plate beam respectively, the two newly-added lengthened main beams form a cross structure, the other newly-added lengthened main beam is located on one quadrant of the cross structure, a plurality of newly-added superposed secondary beams are arranged between the newly-added lengthened main beam and the newly-added lengthened main beam which is parallel to the newly-added lengthened main beam, and the other three quadrants of the cross structure are correspondingly connected with the newly-added superposed secondary beams respectively.
6. The construction method of the foundation structure of the subway upper cover project construction elevator as claimed in claim 1, characterized in that: the height of the newly-added long main beam is 800mm, and the length of the newly-added long main beam is not more than 8000mm; the height and the width of the newly-added superposed secondary beam are 600mm and 650mm respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111292855.2A CN113897999B (en) | 2021-11-03 | 2021-11-03 | Construction method for constructing elevator foundation structure on subway upper cover project |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111292855.2A CN113897999B (en) | 2021-11-03 | 2021-11-03 | Construction method for constructing elevator foundation structure on subway upper cover project |
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| CN113897999B true CN113897999B (en) | 2022-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200732535A (en) * | 2006-02-20 | 2007-09-01 | Shi Cheng Internat Co Ltd | Top-down construction method of underground construction structure |
| KR101111234B1 (en) * | 2008-10-07 | 2012-02-21 | 김송강 | Elevator infrastructure establishment construction workbench |
| CN101666122B (en) * | 2009-09-18 | 2011-05-25 | 上海市第四建筑有限公司 | Construction method of micro distance air crossbeam bottom board |
| CN203256761U (en) * | 2013-05-17 | 2013-10-30 | 中建八局第三建设有限公司 | Tower crane foundation arranged on top plate of basement |
| CN105926820B (en) * | 2016-05-03 | 2020-06-26 | 台州远信建设工程有限公司 | Construction method for precast beam steel support plate resistance mesh combined floor |
| CN206376275U (en) * | 2016-12-30 | 2017-08-04 | 广厦建设集团有限责任公司 | A kind of construction elevator base apparatus on basement roof |
| CN106812153A (en) * | 2017-02-16 | 2017-06-09 | 中建四局第三建筑工程有限公司 | Beam and slab type construction elevator foundation construction engineering method in a kind of backfill |
| CN111411643A (en) * | 2020-03-10 | 2020-07-14 | 中建三局第一建设工程有限责任公司 | Construction method of construction elevator foundation supported on basement top plate |
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