CN111549788A - Installation method of foundation pit section steel combined support - Google Patents
Installation method of foundation pit section steel combined support Download PDFInfo
- Publication number
- CN111549788A CN111549788A CN202010373243.5A CN202010373243A CN111549788A CN 111549788 A CN111549788 A CN 111549788A CN 202010373243 A CN202010373243 A CN 202010373243A CN 111549788 A CN111549788 A CN 111549788A
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- section steel
- foundation pit
- channel
- support
- pit
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses an installation method of a foundation pit profile steel combined support, and aims to provide a construction method of a foundation pit profile steel combined support, which can effectively solve the problems of difficult hoisting and inconvenient installation of a profile steel support beam for an inner support of a foundation pit which is not on the top layer in a deep foundation pit. The installation method of the profile steel combined support of the foundation pit adopts profile steel combined support installation equipment to carry out construction, the profile steel combined support installation equipment comprises a main crane, an in-pit crane and a plurality of suspension assemblies, and each suspension assembly comprises two annular suspension rings. Treat that the foundation ditch down excavate to setting for the elevation after, just can transfer the second to the shaped steel supporting beam of Nth way of first way shaped steel supporting beam below to the meter elevation and accomplish the installation through hoist machine in the pit, prop the shaped steel supporting beam of second to Nth way in the foundation ditch, make the hoist and mount and the simple to operate of the shaped steel supporting beam of support in the foundation ditch of non-top layer behind the foundation ditch excavation.
Description
Technical Field
The invention relates to the field of foundation pit supports, in particular to a method for installing a foundation pit section steel combined support.
Background
In order to ensure the safety of the underground structure and the surrounding environment of the foundation pit, protective measures such as supporting and reinforcing are required to be adopted on the side wall and the periphery of the foundation pit. The foundation pit supporting system generally comprises a foundation pit fender post and a foundation pit inner support. When the degree of depth of foundation ditch is darker, at the foundation ditch excavation in-process, the elevation is set for down excavation in, just need set up one deck foundation ditch and support, and support in every layer of foundation ditch generally including setting up at the inboard purlin roof beam and the shaped steel supporting beam that encloses of foundation ditch fender pile, the shaped steel supporting beam is to propping between the purlin roof beam that encloses in the foundation ditch, has already supported the foundation ditch through the shaped steel supporting beam. The existing deep foundation pit generally needs to be provided with two to three layers of foundation pit inner supports, wherein a section steel supporting beam of the foundation pit inner support at the top layer is convenient to install, but the section steel supporting beam of the foundation pit inner support at the non-top layer (second or third layer) is blocked by the foundation pit inner support at the top layer, and the actual hoisting of the section steel supporting beam of the foundation pit inner support at the non-top layer (second or third layer) is difficult and inconvenient to install.
Disclosure of Invention
The invention aims to provide an installation method of a foundation pit section steel combined support, which can effectively solve the problems of difficult hoisting and inconvenient installation of a section steel support beam for an inner support of a foundation pit which is not at the top layer in a deep foundation pit.
The technical scheme of the invention is as follows:
a method for installing a foundation pit profile steel combined support is characterized in that the method for installing the foundation pit profile steel combined support is implemented by adopting profile steel combined support installation equipment, the profile steel combined support installation equipment comprises a main crane, an in-pit crane and a plurality of suspension assemblies, and each suspension assembly comprises two annular suspension rings;
the installation method of the foundation pit section steel combined support sequentially comprises the following steps:
firstly, in the excavation process of a foundation pit, connecting first to Nth section steel supporting beams from top to bottom in sequence on the ground surface, wherein the value of N is more than or equal to two, and in each section steel supporting beam, one section steel supporting beam at the lower part of any two adjacent section steel supporting beams is hung on one section steel supporting beam at the upper part through two hanging rings of a hanging assembly;
secondly, after the foundation pit is excavated downwards to a set elevation, a first support frame is arranged at the set elevation position of the side wall of the foundation pit and used for supporting a first section steel support beam;
secondly, the main crane hoists the first to Nth channel of section steel support beams into the foundation pit at the ground surface together, and supports the uppermost first channel of section steel support beam on the first channel of support frame, so that the first to Nth channel of section steel support beams are supported on the first channel of support frame together; then, the first path of steel support beams are supported in the foundation pit, and the foundation pit is supported by the first path of steel support beams;
thirdly, continuously excavating the foundation pit downwards, and after the foundation pit is excavated downwards to a set elevation, installing a second support frame at the set elevation position of the side wall of the foundation pit for supporting a second section steel support beam;
installing an in-pit crane on the first channel of section steel support beam, hoisting the second channel to the Nth channel of section steel support beam by the in-pit crane, and moving a lifting ring connecting the first channel of section steel support beam and the second channel of section steel support beam to the outer side of the second channel of section steel support beam;
secondly, hoisting the second to Nth section steel support beams downwards by using an in-pit crane, and supporting the second section steel support beams on a second support frame, so that the second to Nth section steel support beams are supported on the second support frame; secondly, supporting a second channel of section steel support beam pair in the foundation pit, wherein the foundation pit is supported by the second channel of section steel support beam;
then, disassembling the in-pit crane on the first section steel support beam;
fourthly, continuously excavating the foundation pit downwards, and after the foundation pit is excavated downwards to a set elevation, installing an Nth supporting frame at the set elevation position of the side wall of the foundation pit for supporting the Nth section steel supporting beam;
installing an in-pit crane on the N-1 th channel of section steel supporting beam, hoisting the N-th channel of section steel supporting beam by the in-pit crane, and moving a hoisting ring connecting the N-1 th channel of section steel supporting beam and the N-th channel of section steel supporting beam to the outer side of the N-th channel of section steel supporting beam;
secondly, hoisting the Nth channel of section steel support beam downwards by using an in-pit crane, and supporting the Nth channel of section steel support beam on the Nth channel of support frame; and then, the Nth channel of section steel supporting beam pair is supported in the foundation pit, and the foundation pit is supported by the Nth channel of section steel supporting beam.
The installation method of the foundation pit profile steel combined support adopts profile steel combined support installation equipment for construction, after a foundation pit is excavated downwards to a set elevation, a second to N-th profile steel supporting beam below a first profile steel supporting beam can be transferred to the set elevation through an in-pit crane, and installation is completed, the second to N-th profile steel supporting beam is supported in the foundation pit, so that the profile steel supporting beam supported in the foundation pit at a non-top layer after foundation pit excavation is hoisted and installed conveniently, and the problem of inconvenience in installation due to the fact that the profile steel supporting beam supported in the foundation pit at a non-top layer in the deep foundation pit is effectively solved.
Preferably, the lifting ring comprises a U-shaped lifting ring main body and an upper insertion rod, the lifting ring main body comprises a left side connecting plate, a right side connecting plate, a lower connecting rod connected with the lower ends of the left side connecting plate and the right side connecting plate, insertion holes are formed in the upper portions of the left side connecting plate and the right side connecting plate, and the upper insertion rod penetrates through the insertion holes in the left side connecting plate and the right side connecting plate. So, after a certain shaped steel supporting beam props in the foundation ditch, can pull out last bayonet rod to pull down rings from shaped steel supporting beam.
Preferably, the lower connecting rod is formed of a square steel pipe, and the upper plug-in rod is also formed of a square steel pipe.
Preferably, the left and right side connecting plates are steel plates.
Preferably, one end of the upper insertion rod is provided with a limiting block.
Preferably, the left and right side connecting plates are connected with the lower connecting rod through welding.
Preferably, the hoist in the pit is an electric hoist.
The invention has the beneficial effects that: the steel support beam that supports in the foundation ditch of the non-top layer in can effectively solving deep basal pit has the hoist and mount difficulty, the inconvenient problem of installation.
Drawings
FIG. 1 is a schematic structural diagram of the installation method of the foundation pit section steel combined support in the actual construction process.
Fig. 2 is a schematic structural view of the hanging ring of the present invention.
Fig. 3 is a side view of fig. 2.
In the figure:
a foundation pit 1;
a pit internal crane 2;
the device comprises a suspension assembly 3, a hanging ring 3.1, a side connecting plate 3.11, a lower connecting rod 3.12, an inserting hole 3.13 and an upper inserting rod 3.14;
a first steel support beam 4;
a second channel steel support beam 5;
a third steel support beam 6;
a first support frame 7;
the second support 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, a method for installing a foundation pit section steel combined support is implemented by adopting section steel combined support installation equipment. The section steel combined supporting and mounting equipment comprises a main crane, an in-pit crane 2 and a plurality of suspension assemblies 3, wherein the main crane is a tower crane or a vehicle-mounted crane, and the in-pit crane is an electric hoist crane. The same suspension assembly comprises two rings 3.1 in the form of rings.
The installation method of the foundation pit section steel combined support sequentially comprises the following steps:
firstly, in the excavation process of the foundation pit 1, the section steel supporting beams from the first channel to the Nth channel are sequentially connected together from top to bottom on the ground surface, and in the embodiment, the value of N is three. In each section steel supporting beam, one section steel supporting beam at the lower part of any two adjacent section steel supporting beams is hung on one section steel supporting beam at the upper part through two hanging rings of the hanging assembly; specifically, a second channel of section steel supporting beam 5 is hung on a first channel of section steel supporting beam 4 through two hanging rings 3.1 of a hanging assembly 3, and a third channel of section steel supporting beam 6 is hung on the second channel of section steel supporting beam 5 through two hanging rings of the hanging assembly;
in the embodiment, the first to third section steel supporting beams are integral section steel supporting beams, and the integral section steel supporting beam means that the section steel supporting beam is composed of one section steel; or the first to Nth section steel supporting beams are assembled section steel supporting beams, and the assembled section steel supporting beams are formed by connecting a plurality of section steels through bolts.
Secondly, after the foundation pit is excavated downwards to a set elevation, a first support frame 7 is arranged at the set elevation position of the side wall of the foundation pit and used for supporting a first section steel support beam 4;
secondly, the main crane hoists the first to third section steel support beams into the foundation pit at the ground surface together, and supports the uppermost first section steel support beam on the first support frame, so that the first to third section steel support beams are supported on the first support frame together; and then, the first path of steel support beam is supported in the foundation pit, and the foundation pit is supported by the first path of steel support beam.
Thirdly, continuously excavating the foundation pit downwards, and after the foundation pit is excavated downwards to a set elevation, installing a second support frame 8 at the set elevation position of the side wall of the foundation pit for supporting a second section steel support beam 5;
installing an in-pit crane 2 on the first channel of section steel support beam, hoisting the second channel to the third channel of section steel support beam by the in-pit crane, and moving a lifting ring connecting the first channel of section steel support beam and the second channel of section steel support beam to the outer side of the second channel of section steel support beam;
secondly, hoisting the second to third steel support beams downwards by using an in-pit crane, and supporting the second steel support beams on a second support frame, so that the second to Nth steel support beams are supported on the second support frame; secondly, supporting a second channel of section steel support beam pair in the foundation pit, wherein the foundation pit is supported by the second channel of section steel support beam;
and then, disassembling the in-pit crane on the first steel support beam.
Fourthly, continuously excavating the foundation pit downwards, and after the foundation pit is excavated downwards to the set elevation, mounting a third support frame at the set elevation position of the side wall of the foundation pit for supporting a third section steel support beam;
installing an in-pit crane on the second section steel support beam, hoisting a third section steel support beam by the in-pit crane, and moving a lifting ring connecting the second section steel support beam and the third section steel support beam to the outer side of the third section steel support beam;
secondly, hoisting the third section steel support beam downwards by using an in-pit crane, and supporting the third section steel support beam on a third support frame; and then, supporting the third steel support beam pair in the foundation pit, wherein the foundation pit is supported by the third steel support beam pair.
The installation method of the foundation pit shaped steel combination brace of this embodiment adopts shaped steel combination brace erection equipment to construct, treat that the foundation pit down excavates to setting for the elevation after, just can transfer the shaped steel supporting beam of second to third of first shaped steel supporting beam below to the meter elevation and accomplish the installation through the hoist in the pit, prop the shaped steel supporting beam of second to third in the foundation pit, make the hoist and mount and the simple to operate of the shaped steel supporting beam of support in the foundation pit of non-top layer after the foundation pit excavation, thereby effectively solve the shaped steel supporting beam of support in the foundation pit of non-top layer in the deep basal pit and have the hoist and mount difficulty, the inconvenient problem of installation.
Further, as shown in fig. 2 and 3, the hanging ring 3.1 includes a U-shaped hanging ring main body and an upper insertion rod 3.14. The hanging ring main body consists of a left connecting plate 3.11, a right connecting plate 3.11 and a lower connecting rod 3.12 which is connected with the lower ends of the left connecting plate and the right connecting plate. The upper parts of the left and right side connecting plates are provided with inserting holes. The upper inserting rod passes through the inserting holes 3.13 on the left and right side connecting plates. So, after a certain shaped steel supporting beam props in the foundation ditch, can pull out last bayonet rod to pull down rings from shaped steel supporting beam.
The lower connecting rod is composed of a square steel pipe, and the upper inserting rod is also composed of a square steel pipe. The left and right side connecting plates are steel plates.
The left and right side connecting plates are connected with the lower connecting rod through welding.
One end of the upper insertion rod is provided with a limiting block 3.15. So, when last peg graft pole passed the spliced eye on two blocks of side connecting plates about, can carry on spacingly to last peg graft pole through the stopper, be convenient for go up the grafting operation of peg graft pole.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. A method for installing a foundation pit profile steel combined support is characterized in that the method for installing the foundation pit profile steel combined support is implemented by adopting profile steel combined support installation equipment, the profile steel combined support installation equipment comprises a main crane, an in-pit crane and a plurality of suspension assemblies, and each suspension assembly comprises two annular suspension rings;
the installation method of the foundation pit section steel combined support sequentially comprises the following steps:
firstly, in the excavation process of a foundation pit, connecting first to Nth section steel supporting beams from top to bottom in sequence on the ground surface, wherein the value of N is more than or equal to two, and in each section steel supporting beam, one section steel supporting beam at the lower part of any two adjacent section steel supporting beams is hung on one section steel supporting beam at the upper part through two hanging rings of a hanging assembly;
secondly, after the foundation pit is excavated downwards to a set elevation, a first support frame is arranged at the set elevation position of the side wall of the foundation pit and used for supporting a first section steel support beam;
secondly, the main crane hoists the first to Nth channel of section steel support beams into the foundation pit at the ground surface together, and supports the uppermost first channel of section steel support beam on the first channel of support frame, so that the first to Nth channel of section steel support beams are supported on the first channel of support frame together; then, the first path of steel support beams are supported in the foundation pit, and the foundation pit is supported by the first path of steel support beams;
thirdly, continuously excavating the foundation pit downwards, and after the foundation pit is excavated downwards to a set elevation, installing a second support frame at the set elevation position of the side wall of the foundation pit for supporting a second section steel support beam;
installing an in-pit crane on the first channel of section steel support beam, hoisting the second channel to the Nth channel of section steel support beam by the in-pit crane, and moving a lifting ring connecting the first channel of section steel support beam and the second channel of section steel support beam to the outer side of the second channel of section steel support beam;
secondly, hoisting the second to Nth section steel support beams downwards by using an in-pit crane, and supporting the second section steel support beams on a second support frame, so that the second to Nth section steel support beams are supported on the second support frame; secondly, supporting a second channel of section steel support beam pair in the foundation pit, wherein the foundation pit is supported by the second channel of section steel support beam;
then, disassembling the in-pit crane on the first section steel support beam;
fourthly, continuously excavating the foundation pit downwards, and after the foundation pit is excavated downwards to a set elevation, installing an Nth supporting frame at the set elevation position of the side wall of the foundation pit for supporting the Nth section steel supporting beam;
installing an in-pit crane on the N-1 th channel of section steel supporting beam, hoisting the N-th channel of section steel supporting beam by the in-pit crane, and moving a hoisting ring connecting the N-1 th channel of section steel supporting beam and the N-th channel of section steel supporting beam to the outer side of the N-th channel of section steel supporting beam;
secondly, hoisting the Nth channel of section steel support beam downwards by using an in-pit crane, and supporting the Nth channel of section steel support beam on the Nth channel of support frame; and then, the Nth channel of section steel supporting beam pair is supported in the foundation pit, and the foundation pit is supported by the Nth channel of section steel supporting beam.
2. The method for installing the foundation pit section steel combined support according to claim 1, wherein the hanging ring comprises a U-shaped hanging ring main body and an upper insertion rod, the hanging ring main body is composed of a left side connecting plate, a right side connecting plate and a lower connecting rod which is connected with the lower ends of the left side connecting plate and the right side connecting plate, insertion holes are formed in the upper portions of the left side connecting plate and the right side connecting plate, and the upper insertion rod penetrates through the insertion holes in the left side connecting plate and the right side connecting plate.
3. The method for installing a foundation pit section steel combined support according to claim 2, wherein the lower connecting rod is made of a square steel pipe, and the upper inserting rod is also made of a square steel pipe.
4. The method for installing the foundation pit section steel combination support according to claim 2 or 3, wherein the left and right side connecting plates are steel plates.
5. The method for installing the foundation pit section steel combined support according to claim 2 or 3, wherein one end of the upper insertion rod is provided with a limiting block.
6. The method for installing the foundation pit section steel combined support according to claim 2 or 3, wherein the left and right side connecting plates are connected with the lower connecting rod through welding.
7. The method for installing the foundation pit type steel combined support according to claim 1, 2 or 3, wherein the in-pit crane is an electric hoist crane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010373243.5A CN111549788A (en) | 2020-05-06 | 2020-05-06 | Installation method of foundation pit section steel combined support |
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| CN202010373243.5A CN111549788A (en) | 2020-05-06 | 2020-05-06 | Installation method of foundation pit section steel combined support |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113062326A (en) * | 2021-03-16 | 2021-07-02 | 上海市城市建设设计研究总院（集团）有限公司 | Foundation pit reinforced concrete inner support system and construction method for rapid installation of foundation pit reinforced concrete inner support system |
| CN114411760A (en) * | 2022-02-21 | 2022-04-29 | 中国建筑第八工程局有限公司 | Ground wall pre-buried slideway type steel support foundation pit supporting system and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113062326A (en) * | 2021-03-16 | 2021-07-02 | 上海市城市建设设计研究总院（集团）有限公司 | Foundation pit reinforced concrete inner support system and construction method for rapid installation of foundation pit reinforced concrete inner support system |
| CN114411760A (en) * | 2022-02-21 | 2022-04-29 | 中国建筑第八工程局有限公司 | Ground wall pre-buried slideway type steel support foundation pit supporting system and construction method thereof |
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