CN112878696B - Early warning system of out-of-plane instability in sliding construction of inverted triangular truss type roof - Google Patents
Early warning system of out-of-plane instability in sliding construction of inverted triangular truss type roof Download PDFInfo
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- CN112878696B CN112878696B CN201911201571.0A CN201911201571A CN112878696B CN 112878696 B CN112878696 B CN 112878696B CN 201911201571 A CN201911201571 A CN 201911201571A CN 112878696 B CN112878696 B CN 112878696B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The invention relates to the field of installation or transportation of large-scale construction, in particular to an out-of-plane instability early warning system in inverted triangle truss type roof sliding construction; the method is characterized in that: the system comprises a load adjusting subsystem (1), a sliding unit lateral instability identification and stabilization subsystem (2) and a computer acquisition control subsystem (3); the early warning system effectively avoids the lateral instability of the sliding unit in the sliding process through the combined action of the load adjusting subsystem (1), the sliding unit lateral instability identifying and stabilizing subsystem (2) and the computer acquisition control subsystem (3), realizes synchronous deviation rectifying in the sliding process and ensures the smooth implementation of the sliding construction scheme; the method is mainly characterized in that the problem of lateral instability of the large-span inverted triangular truss type roof sliding unit in the sliding process is solved on the premise that the structural form of the sliding unit is not specially treated.
Description
Technical Field
The invention relates to the field of installation or transportation of large-scale construction, in particular to an out-of-plane instability early warning system in the slippage construction of an inverted triangular truss type roof.
Background
The hydraulic synchronous sliding technology is an integral sliding construction technology which takes a hydraulic crawler as main driving equipment and utilizes a computer to control and adjust hydraulic pressure. The method is mainly applied to the field of integral construction of large-span steel roof structures. In general, a high-altitude assembling platform is arranged at one end of a roof along the axis of a roof support, after one sliding unit is assembled, the sliding unit is slid to a designated position, then the assembling and sliding of the next sliding unit are carried out, construction is carried out in sequence, and the sliding units are gradually accumulated and slid to the designed position. In the sliding process, the sliding track only bears the self-weight load effect of the roof structure.
The hydraulic synchronous sliding construction technology is mature in the field of steel structure construction. When the truss system with the roof in the inverted triangle shape is subjected to sliding construction, due to instability of the inverted triangle, the first truss sliding unit has the risk of overturning from the outside in the sliding process.
In the conventional hydraulic synchronous sliding construction process, the sliding rail is arranged and attached to the position of a roof support and arranged on a lower civil engineering structure system, the civil engineering beam column is regularly distributed, a large-space large-clear-span structure system does not exist, and a civil engineering structure can generally provide enough support for the arrangement of the sliding rail, so that the sliding construction requirement is met; the computer synchronously controls the sliding process, and the existing computer synchronous control has quite high precision for the conventional plane truss and net rack type roof based on the relative positions of different sliding shoes of the same sliding unit along the sliding direction, so that the safety of the sliding process can be ensured.
However, for exhibition centers and venue buildings, the interior of the buildings is a large space due to the needs of the buildings, the civil engineering columns and the beams are distributed on the periphery of the large space to form a closed frame, and the roof is an inverted triangular steel roof truss. The construction of the large-span inverted triangular steel roof truss generally adopts installation methods such as full framing scaffold bulk loading, block hoisting, accumulated sliding and the like. If the construction period is tight, civil engineering construction and steel roof construction cross operation exist, and the construction site can not meet the requirements of scaffold erection and walking of large-scale hoisting machinery, the hydraulic synchronous sliding construction is still a good scheme. When the structural form adopts the traditional hydraulic synchronous sliding construction method, a great technical problem exists: after the high-altitude splicing platform is assembled, the first roof truss sliding units are slid in place, the outer surface stability of the sliding units is difficult to effectively guarantee due to the fact that the sliding units are inverted triangles, and the technical problem of how to guarantee the outer surface stability of the sliding units in the sliding process of the first roof truss sliding units is different from that of the sliding units in the conventional structure.
Disclosure of Invention
The invention aims to overcome the defects and provides the early warning system for monitoring and adjusting the external instability of the truss surface in the sliding construction process of the large-span inverted triangular truss type roof, which has the advantages of simple structure, convenience in manufacturing and simplicity in operation.
In order to achieve the above object, the present invention is realized by:
an out-of-plane instability early warning system in the sliding construction of an inverted triangular truss type roof comprises a load adjustment subsystem, a sliding unit lateral instability identification and stabilization subsystem and a computer acquisition control subsystem; wherein the content of the first and second substances,
the load adjustment subsystem is composed of an external stable sliding shoe, a sliding shoe limiting plate, a hydraulic oil cylinder base, a hydraulic oil cylinder, a connection converter and a stable pull rod connection lug plate, wherein the external stable sliding shoe is an internal cavity body, and a stiffening plate is arranged in the cavity body to ensure the stability of a cavity plate; the bottom plate of the out-of-plane stable sliding shoe is positioned on the sliding track, and a sliding shoe limiting plate is arranged along the track direction and used for limiting the displacement of the out-of-plane stable sliding shoe along the vertical sliding direction in the sliding process; the hydraulic oil cylinder is positioned on the top plate of the out-of-plane stable sliding shoe and is connected with the out-of-plane stable sliding shoe through a hydraulic oil cylinder base, the hydraulic oil cylinder base is connected through a connecting bolt, the hydraulic oil cylinder is controlled by a computer acquisition control subsystem through a signal transmission line, and the hydraulic oil cylinder and the supporting pressure rod are fixedly connected through a connecting converter;
the lateral instability recognition and stabilization subsystem of the sliding unit consists of a strain gauge, a supporting pressure rod, a stabilizing pull rod and a U-shaped connecting lug plate, wherein a strain edge is controlled by a computer acquisition control subsystem through a signal transmission line, the strain gauge is attached to the end part of the supporting pressure rod and used for measuring the compression deformation of the supporting pressure rod, the supporting pressure rod is connected with a hydraulic oil cylinder through a connecting converter, one end of the stabilizing pull rod is connected to a main sliding shoe of the sliding unit, and the other end of the stabilizing pull rod is connected with an out-of-plane stabilizing sliding shoe through the U-shaped connecting lug plate;
the computer acquisition control subsystem comprises a computer and an oil pressure control platform, wherein oil pressure control platform operation software is arranged in the computer, the operation on the oil pressure control platform is completed according to data acquired by a hydraulic oil cylinder and a strain gauge at the end part of a supporting pressure rod, the computer is connected with the oil pressure control platform through a data line, the computer and the sliding unit lateral instability identification and stabilization subsystem are subjected to data transmission through the data line, and the oil pressure control platform and the hydraulic oil cylinder are subjected to data transmission through the data line.
The application method of the out-of-plane instability early warning system in the slippage construction of the inverted triangular truss type roof comprises the following steps
The early warning system effectively avoids the lateral instability of the sliding unit in the sliding process through the combined action of the load adjusting subsystem 1, the sliding unit lateral instability identifying and stabilizing subsystem 2 and the computer acquisition control subsystem 3, realizes synchronous deviation correction in the sliding process, does not increase the deviation correction period additionally, and ensures the smooth implementation of the sliding construction scheme; the method is mainly characterized in that the problem of lateral instability in the sliding process of the large-span inverted-triangle truss type roof sliding unit is solved on the premise that the structural form of the sliding unit is not specially treated, the position of the sliding unit in the whole construction process is automatically identified and corrected by a computer, and the feasibility of the sliding construction method of the inverted-triangle type steel roof is ensured.
Drawings
Fig. 1 is a schematic diagram of the warning system.
FIG. 2 is a schematic view of a stabilizing shoe in the warning system.
Fig. 3 is a schematic view of a stabilizing pull rod in the warning system.
Fig. 4 is an isometric view of a stabilizing shoe in the present warning system.
Fig. 5 is a schematic view of the working state of the warning system.
Detailed Description
The invention is further illustrated by the following specific examples.
The early warning system for monitoring and adjusting truss out-of-plane instability in the sliding construction process of the large-span inverted triangular truss type roof comprises a load adjusting subsystem 1, a sliding unit lateral instability identification and stabilization subsystem 2 and a computer acquisition control subsystem 3.
As shown in fig. 1, the specific structure is:
the load adjustment subsystem 1 comprises an out-of-plane stable sliding shoe 12, a sliding shoe limiting plate 13, a hydraulic oil cylinder base 14, a hydraulic oil cylinder 16, a connecting converter 17 and a stable pull rod connecting lug plate 18, wherein the out-of-plane stable sliding shoe 12 is a hollow cavity, and a stiffening plate is arranged inside the hollow cavity to ensure the stability of a cavity plate; the bottom plate of the out-of-plane stable sliding shoe 12 is positioned on a sliding track, and a sliding shoe limiting plate 13 is arranged along the track direction and used for limiting the displacement of the out-of-plane stable sliding shoe 12 along the vertical sliding direction in the sliding process; the hydraulic oil cylinder 16 is positioned on a top plate of the out-of-plane stable sliding shoe 12 and is connected with the out-of-plane stable sliding shoe 12 through a hydraulic oil cylinder base 14, the hydraulic oil cylinder base 14 is connected through a connecting bolt 15, the hydraulic oil cylinder 16 is controlled by the computer acquisition control subsystem 3 through a third data line 35, and the hydraulic oil cylinder 16 and the supporting pressure rod 22 are fixedly connected through a connecting converter.
The slip unit lateral instability recognition and stabilization subsystem 2 is composed of a strain gauge 21, a supporting pressure bar 22, a stabilizing pull rod 23 and a U-shaped connecting lug plate 24, the strain gauge 21 is controlled by a computer acquisition control subsystem 3 through a first data line 32, the strain gauge 21 is attached to the end portion of the supporting pressure bar 22 and used for measuring the compression deformation of the supporting pressure bar 22, the supporting pressure bar 22 is connected with a hydraulic oil cylinder 16 through a connecting converter 17, one end of the stabilizing pull rod 23 is connected to the main sliding shoe of the slip unit, and the other end of the stabilizing pull rod 23 is connected with an out-of-plane stabilizing sliding shoe 12 through the U-shaped connecting lug plate 24.
The computer acquisition control subsystem 3 comprises a computer 31 and an oil pressure control platform 34, wherein oil pressure control platform operation software is arranged in the computer 31, the operation on the oil pressure control platform 34 is completed according to data acquired by the hydraulic oil cylinder 16 and the strain gauge 21 at the supporting compression bar 22, the computer 31 is connected with the oil pressure control platform 34 through a second data line 33, the computer 31 and the sliding unit lateral instability identification and stabilization subsystem 2 perform data transmission through a first data line 32, and the oil pressure control platform 34 and the hydraulic oil cylinder 16 perform data transmission through a third data line 35.
The specific use method of the early warning system comprises the following steps:
determining a high-altitude slip construction scheme of a slip unit according to the structural form of the inverted triangular steel roof 5, and determining the specific steps of single slip and accumulated slip, wherein a slip track is arranged under the corresponding axis of the support, and the slip track is supported on the upper surface of the lower civil engineering structural beam.
According to the sliding construction scheme, a finite element calculation simulation construction process is carried out by adopting finite element software, when the scheme is checked in the determination stage, the lateral instability identification of the sliding unit and the supporting pressure rod 22 of the stabilizing subsystem are replaced by horizontal constraint, the horizontal constraint counter force and the vertical counter force at the supporting pressure rod 22 are checked, according to the vertical counter force and the geometric size of the sliding unit 6, the geometric size of the supporting pressure rod 22 and the size of the connecting converter 17 are determined, and the number of the strain gauges 21 and the number of the strain gauges 17 are determined
The specifications of hydraulic ram 16 are selected.
The lateral deformation can occur in the sliding process of the sliding unit 6, the supporting pressure rod 22 is extruded, the strain gauge 21 attached to the end of the supporting pressure rod 22 transmits strain data to the computer acquisition control subsystem 3, a computer software system sets a loading strain boundary value and an unloading strain boundary value in advance, when the acquired strain value exceeds the loading strain boundary value set in the system, the oil pressure control table 34 is activated, the load adjustment subsystem 1 is loaded, along with the loading, when the acquired strain value tends to the unloading strain boundary value, the oil pressure control table is closed, the hydraulic oil cylinder is stopped to be loaded, and the hydraulic oil cylinder is repeatedly activated and closed until the sliding unit slides in place. And the hydraulic oil cylinder is closed for the last time, and the sliding unit reaches a stable state.
The invention discloses an early warning system for monitoring and adjusting truss out-of-plane instability in the sliding construction process of a large-span inverted triangle truss type roof, which effectively avoids the lateral instability of a sliding unit in the sliding process through the combined action of a load adjusting subsystem 1, a sliding unit lateral instability identifying and stabilizing subsystem 2 and a computer acquisition control subsystem 3, realizes synchronous deviation correction in the sliding process, does not additionally increase the deviation correction period, and ensures the smooth implementation of a sliding construction scheme.
Claims (2)
1. The utility model provides an outer unstability's of construction well of falling triangle-shaped truss-like roof slides early warning system which characterized by: the system comprises a load adjusting subsystem (1), a sliding unit lateral instability identification and stabilization subsystem (2) and a computer acquisition control subsystem (3); wherein, the first and the second end of the pipe are connected with each other,
the load adjustment subsystem (1) consists of an out-of-plane stable sliding shoe (12), a sliding shoe limiting plate (13), a hydraulic oil cylinder base (14), a hydraulic oil cylinder (16), a connection converter (17) and a stable pull rod connection lug plate (18), wherein the out-of-plane stable sliding shoe (12) is a hollow cavity, and a stiffening plate is arranged inside the cavity to ensure the stability of a cavity plate; the bottom plate of the out-of-plane stable sliding shoe (12) is positioned on the sliding track, and a sliding shoe limiting plate (13) is arranged along the track direction and used for limiting the displacement of the out-of-plane stable sliding shoe (12) along the vertical sliding direction in the sliding process; the hydraulic oil cylinder (16) is positioned on a top plate of the out-of-plane stable sliding shoe (12) and is connected with the out-of-plane stable sliding shoe (12) through a hydraulic oil cylinder base (14), the hydraulic oil cylinder base (14) is connected through a connecting bolt (15), the hydraulic oil cylinder (16) is controlled by a computer acquisition control subsystem (3) through a third data line (35), and the hydraulic oil cylinder (16) is connected and fixed with the supporting pressure rod (22) through a connecting converter;
the lateral instability recognition and stabilization subsystem (2) of the sliding unit consists of a strain gauge (21), a supporting compression bar (22), a stabilizing pull rod (23) and a U-shaped connection lug plate (24), wherein the strain gauge (21) is controlled by a computer acquisition control subsystem (3) through a first data line (32), the strain gauge (21) is attached to the end part of the supporting compression bar (22) and used for measuring the compression deformation of the supporting compression bar (22), the supporting compression bar (22) is connected with a hydraulic oil cylinder (16) through a connection converter (17), one end of the stabilizing pull rod (23) is connected to a main sliding shoe of the sliding unit, and the other end of the stabilizing pull rod is connected with an out-of-plane stabilizing sliding shoe (12) through the U-shaped connection lug plate (24);
the computer acquisition control subsystem (3) comprises a computer (31) and an oil pressure control platform (34), wherein the computer (31) is internally provided with oil pressure control platform operation software, the operation on the oil pressure control platform (34) is completed according to data acquired by a hydraulic oil cylinder (16) and a strain gauge (21) at the end part of a supporting pressure rod (22), the computer (31) is connected with the oil pressure control platform (34) through a second data line (33), the computer (31) and the sliding unit lateral instability identification and stabilization subsystem (2) are subjected to data transmission through a first data line (32), and the oil pressure control platform (34) and the hydraulic oil cylinder (16) are subjected to data transmission through a third data line (35).
2. The use method of the out-of-plane instability early warning system in the sliding construction of the inverted triangular truss type roof as claimed in claim 1 is characterized in that: comprises that
Step 1, determining a high-altitude slippage construction scheme of a slippage unit according to the structural form of an inverted triangular steel roof (5), and determining the specific steps of single slippage and accumulated slippage, wherein slippage tracks are arranged below corresponding axes of a support and supported on the upper surface of a lower civil engineering structural beam;
step 2, according to a slippage construction scheme, finite element calculation is carried out by adopting finite element software to simulate a construction process, when checking calculation is carried out in a scheme determining stage, lateral instability recognition of a slippage unit and a supporting pressure rod (22) of a stabilizing subsystem are replaced by horizontal constraint, horizontal constraint counter force and vertical counter force at the supporting pressure rod (22) are checked, according to the vertical counter force and the geometric size of the slippage unit (6), the geometric size of the supporting pressure rod (22) and the size of a connecting converter (17) are determined, the number of strain gauges (21) is determined, and the specification of a hydraulic oil cylinder (16) is selected; the lateral deformation can occur in the sliding process of the sliding unit (6), the supporting pressure rod (22) is extruded, the strain sheet (21) attached to the end portion of the supporting pressure rod (22) transmits strain data to the computer acquisition control subsystem (3), a computer software system sets a loading strain boundary value and an unloading strain boundary value in advance, when the acquired strain value exceeds a loading strain boundary value set in the system, the oil pressure control table (34) is activated, the load adjustment subsystem (1) is loaded, along with the loading, when the acquired data tend to the unloading strain boundary value, the oil pressure control table is closed, the hydraulic oil cylinder is stopped to be loaded, the hydraulic oil cylinder is repeatedly activated and closed until the sliding unit slides in place, the hydraulic oil cylinder is closed for the last time, and the sliding unit reaches a stable state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911201571.0A CN112878696B (en) | 2019-11-29 | 2019-11-29 | Early warning system of out-of-plane instability in sliding construction of inverted triangular truss type roof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911201571.0A CN112878696B (en) | 2019-11-29 | 2019-11-29 | Early warning system of out-of-plane instability in sliding construction of inverted triangular truss type roof |
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| CN112878696B true CN112878696B (en) | 2022-12-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103806658B (en) * | 2012-11-14 | 2016-01-20 | 五冶集团上海有限公司 | High-cleanness, high electronic workshop steel work integral slipping and discharging method |
| CN204139628U (en) * | 2014-10-14 | 2015-02-04 | 中亿丰建设集团股份有限公司 | Large cantilever asymmetric space multistory truss auxiliary sliding device |
| CN104989114B (en) * | 2015-07-15 | 2017-05-10 | 上海绿地建设(集团)有限公司 | Sliding construction device and method for large-span arc-shaped roof |
| CN108468430B (en) * | 2018-03-12 | 2021-02-05 | 成都建筑工程集团总公司 | Hoisting and sliding construction method for large-span unequal-height support steel truss structure |
| CN109505404B (en) * | 2018-11-30 | 2021-01-19 | 上海宝冶集团有限公司 | Intelligent identification and restraint system for roof deformation |
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