CN112302050A - Steel support erecting method suitable for cover plate - Google Patents
Steel support erecting method suitable for cover plate Download PDFInfo
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- CN112302050A CN112302050A CN202011072835.XA CN202011072835A CN112302050A CN 112302050 A CN112302050 A CN 112302050A CN 202011072835 A CN202011072835 A CN 202011072835A CN 112302050 A CN112302050 A CN 112302050A
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- China
- Prior art keywords
- steel support
- steel
- cover plate
- erecting
- support
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Classifications
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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
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
A steel support erecting method suitable for being used under a cover plate comprises the following steps: s1: fixing the angle steel bracket on the embedded steel plate; s2: sequentially hoisting each section of steel support by using a hoisting device, simultaneously connecting each section of steel support, and supporting the lower end of each steel support through a split heads; s3: applying pre-applied axial force to the steel support movable head by using a jack; s4: and (5) finishing erecting the steel support, and dismantling the split heads and the hoisting device. The invention is used for solving the problem of difficulty in erecting the steel support under the cover plate.
Description
Technical Field
The invention relates to a steel support erecting method suitable for a cover plate.
Background
In the main construction process of Fuzhou subway No. 4 line Huahai park station in the first period and the second period, in order to keep the road smooth, a reinforced concrete structure cover plate is poured to be used as a passing road. Along with the development of the engineering progress, earth excavation and supporting construction below the cover plate need to be carried out so as to carry out main body construction operation of the next step. The steel support erection under the existing cover plate is mainly characterized in that steel supports are hoisted by utilizing a second hand-pulled hoist through hoisting rings embedded under the cover plate, the hoisting operation progress is slow, and some steel supports can be intercepted by installing the steel supports in front in the hoisting process; in order to ensure the safety and stability of the foundation pit and maintain the construction progress not to fall behind, the steel support erecting method becomes a problem.
Disclosure of Invention
The invention aims to provide a method for erecting a steel support under a cover plate, which is used for solving the problem of difficulty in erecting the steel support under the cover plate.
In order to solve the above problems, the technical solution to be solved by the present invention is:
a steel support erecting method suitable for being used under a cover plate comprises the following steps:
s1: fixing the angle steel bracket on the embedded steel plate;
s2: sequentially hoisting each section of steel support by using a hoisting device, simultaneously connecting each section of steel support, and supporting the lower end of each steel support through a split heads;
s3: applying pre-applied axial force to the steel support movable head by using a jack;
s4: and (5) finishing erecting the steel support, and dismantling the split heads and the hoisting device.
After the steel support is erected, a lifting lug is fixed on the wall above the steel support and connected with the steel support through a steel wire rope.
The method for applying the pre-axial force comprises the following steps: checking the measuring device → installing a jack and an oil pump → checking whether the action point of the jack is concentric with the support → applying pre-axial force → static stop → installing a support wedge iron steel → back jacking.
The lifting device comprises a lifting shaft, the upper ends of two supports are hinged to the lifting shaft, the lower ends of the supports are connected to the supports through shafts, universal wheels are installed at the two ends of each support, the two ends of each steel support are connected with the lifting shaft through first chain blocks, and the two supports are connected through a plurality of second chain blocks.
The split heads comprise a bottom plate, sliding grooves are formed in two sides of the bottom plate respectively, top frames are assembled in the sliding grooves, and jacks are arranged between the top frames and the bottom plate.
The invention has the beneficial effects that: the steel support is lifted and installed in sections, the one-time lifting weight of the steel support is reduced, the steel support can move flexibly under the cover plate, smooth erection of the steel support is guaranteed, meanwhile, the lifting device can achieve adjustment of the lifting height of the steel support, the steel support is prevented from being installed in the front in an intercepting mode, the steel support can smoothly enter a steel support installation station, and the device is simple in structure and convenient to manufacture.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic front view of the present invention,
figure 2 is a front view structural schematic diagram of the hoisting device of the invention,
fig. 3 is a front view of the split heads of the present invention.
In the figure: the device comprises a cover plate 1, a lifting lug 2, a steel wire rope 3, a movable head 4, a steel bracket 5, a soil cushion layer 6, a lifting device 7, a stool 8, a steel support 9, a pre-buried steel plate 10, a lifting shaft 71, a support 72, a universal wheel 73, a second hand-pull block 74, a support 75, a first hand-pull block 76, a bottom plate 81, a sliding groove 82, a top frame 83 and a jack 84.
Detailed Description
As shown in fig. 1 to 3, a method for erecting a steel support suitable for use under a cover plate comprises the following steps:
s1: and excavating the earth to the corresponding height. According to the elevation data of the bottom of the layer of steel support 9, excavating the earth to the position 1m below the corresponding elevation, leveling the earth to the elevation of the substrate if the earth is the last layer of steel support 9, and directly excavating the earth to the elevation of the substrate.
S2: and (5) pouring a concrete cushion. A C20 concrete cushion layer 6 with the thickness of 150mm is poured on the leveled soil surface by using an earth pump, and a cushion layer with the width of about 3m is poured on the outer side of the multi-directional cover plate to ensure the normal transportation of construction materials.
S3: two double-equilateral angle steel brackets 5 with the length not less than 25cm and the length of 160 × 10mm are welded on the embedded steel plate 10. Note that the angle bracket is fully welded to the embedded steel plate 10.
S4: the steel support 9 is erected in three sections in general, after the first section of steel support 9 is erected by the hoisting device 7, the first section of steel support 9 is supported by the split heads 8, and then the next section of steel support 9 is assembled by the hoisting device 7. After the second section of the steel support is assembled, the steel support 9 is supported by using the split heads 8, and finally the third section of the steel support 9 is installed.
S3: after the steel support 9 is in place, two 100t jacks 84 are used for exerting pre-applied axial force on the movable head 4 of the steel support 9, the steel support 9 is erected, and the split heads 8 and the lifting device 7 are disassembled. The method for applying the pre-axial force comprises the following steps: checking the metering device → installing the jack 84 and the oil pump → checking whether the action point of the jack 84 is concentric with the support → applying pre-axial force → static stop → installing the supporting wedge iron steel → back-jacking.
After the steel support 9 is erected, a lifting lug 2 is fixed on the wall body above the steel support 9, and the lifting lug 2 is connected with the steel support 9 through a steel wire rope 3. The stability and the safety of the steel support 9 system during the excavation construction period of the foundation pit are improved in a mode of 'lower support and upper lifting'.
The lifting device 7 comprises a lifting shaft 71, the upper ends of two brackets 72 are hinged with the lifting shaft 71, the lower ends of the brackets 72 are connected to a bracket 75 in a shaft mode, universal wheels 73 are mounted at two ends of the bracket 75, two ends of a steel support 9 are connected with the lifting shaft 71 through first chain blocks 76, and the two brackets 72 are connected through a plurality of second chain blocks 74.
During the process of moving the steel support 9 by the hoisting device 7, when the installed steel support 9 is intercepted in front of the steel support 9, the second hand-pulling block 74 can be released, the bracket 72 is lowered to the position below the installed steel support 9, then the steel support 9 is moved to the appointed installation position, and then the first hand-pulling block 76 and the second hand-pulling block 74 are used for moving the steel support 9 to the appointed height for installation, so that the steel support 9 can be displaced and lifted in a small space.
The split heads 8 comprise a bottom plate 81, sliding grooves 82 are respectively arranged on two sides of the bottom plate 81, top frames 83 are assembled in the sliding grooves 82, and jacks 84 are arranged between the top frames 83 and the bottom plate 81. The jack 84 drives the head frame 83 upward to finely adjust and support the position of one end of the steel support 9.
Claims (5)
1. A steel support erecting method suitable for being used under a cover plate is characterized by comprising the following steps:
s1: fixing the bracket on the embedded steel plate (10);
s2: sequentially hoisting each section of steel support (9) by using a hoisting device (7), connecting each section of steel support (9), and supporting the lower end of each section of steel support (9) through a split heads (8);
s3: a jack (84) is used for exerting pre-axial force on the movable head (4) of the steel support (9);
s4: and (3) finishing erecting the steel support (9), and dismantling the split heads (8) and the hoisting device (7).
2. The method for erecting the steel support applicable to the underside of the cover plate as recited in claim 1, wherein after the steel support (9) is erected, a lifting lug (2) is fixed on the wall body above the steel support (9), and the lifting lug (2) is connected with the steel support (9) through a steel wire rope (3).
3. The method for erecting the steel support under the cover plate as recited in claim 1, wherein the method for applying the pre-axial force comprises the following steps: checking the metering device → installing the jack (84) and the oil pump → correcting the action point of the jack (84) → applying pre-axial force → static stop → installing the supporting wedge iron steel → back jacking.
4. The method for erecting the steel support suitable for being arranged under the cover plate according to any one of claims 1 to 3, wherein the lifting device (7) comprises a lifting shaft (71), the upper ends of two brackets (72) are hinged with the lifting shaft (71), the lower end shafts of the brackets (72) are connected to a bracket (75) in a shaft mode, universal wheels (73) are installed at two ends of the bracket (75), two ends of the steel support (9) are connected with the lifting shaft (71) through a first hand-pulling block (76), and the two brackets (72) are connected through a plurality of second hand-pulling blocks (74).
5. A method for erecting a steel support adapted to be used under a cover plate according to any one of claims 1 to 3, wherein said split heads (8) comprise a bottom plate (81), sliding grooves (82) are respectively arranged on both sides of the bottom plate (81), a top frame (83) is assembled in each sliding groove (82), and a jack (84) is arranged between each top frame (83) and the bottom plate (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011072835.XA CN112302050A (en) | 2020-10-09 | 2020-10-09 | Steel support erecting method suitable for cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011072835.XA CN112302050A (en) | 2020-10-09 | 2020-10-09 | Steel support erecting method suitable for cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302050A true CN112302050A (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011072835.XA Pending CN112302050A (en) | 2020-10-09 | 2020-10-09 | Steel support erecting method suitable for cover plate |
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| Country | Link |
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| CN (1) | CN112302050A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2534166Y (en) * | 2002-03-12 | 2003-02-05 | 中原石油勘探局建筑集团公司 | Load unloading replacing device for jack |
| CN201737636U (en) * | 2010-06-28 | 2011-02-09 | 濮阳泓天威药业有限公司 | Mobile hoist |
| CN202644541U (en) * | 2012-06-05 | 2013-01-02 | 成都市第四建筑工程公司 | Steel support structure for ultra-deep foundation pit construction in narrow field |
| CN202989935U (en) * | 2013-01-08 | 2013-06-12 | 北京市市政工程设计研究总院 | Simple device for erecting or dismantling steel braces of subway foundation pits |
| CN108946465A (en) * | 2018-08-30 | 2018-12-07 | 上海市安装工程集团有限公司 | A kind of fast erecting hanger and its application method |
| CN210973587U (en) * | 2019-11-12 | 2020-07-10 | 江苏维克特建设工程有限公司 | Small-size removal hoisting machine |
-
2020
- 2020-10-09 CN CN202011072835.XA patent/CN112302050A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2534166Y (en) * | 2002-03-12 | 2003-02-05 | 中原石油勘探局建筑集团公司 | Load unloading replacing device for jack |
| CN201737636U (en) * | 2010-06-28 | 2011-02-09 | 濮阳泓天威药业有限公司 | Mobile hoist |
| CN202644541U (en) * | 2012-06-05 | 2013-01-02 | 成都市第四建筑工程公司 | Steel support structure for ultra-deep foundation pit construction in narrow field |
| CN202989935U (en) * | 2013-01-08 | 2013-06-12 | 北京市市政工程设计研究总院 | Simple device for erecting or dismantling steel braces of subway foundation pits |
| CN108946465A (en) * | 2018-08-30 | 2018-12-07 | 上海市安装工程集团有限公司 | A kind of fast erecting hanger and its application method |
| CN210973587U (en) * | 2019-11-12 | 2020-07-10 | 江苏维克特建设工程有限公司 | Small-size removal hoisting machine |
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Application publication date: 20210202 |