CN113073567A - Triangular hanging basket counter-force prepressing construction method - Google Patents

Triangular hanging basket counter-force prepressing construction method Download PDF

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Publication number
CN113073567A
CN113073567A CN202110386362.9A CN202110386362A CN113073567A CN 113073567 A CN113073567 A CN 113073567A CN 202110386362 A CN202110386362 A CN 202110386362A CN 113073567 A CN113073567 A CN 113073567A
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CN
China
Prior art keywords
lower cross
cross beam
hanging basket
triangular
steel
Prior art date
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Pending
Application number
CN202110386362.9A
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Chinese (zh)
Inventor
李世平
徐杰
郑伯钟
寇鹏
高东旭
王常
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Fourth Engineering Division Corp Ltd
China Construction Fourth Bureau First Construction Engineering Co Ltd
Original Assignee
China Construction Fourth Engineering Division Corp Ltd
China Construction Fourth Bureau First Construction Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Construction Fourth Engineering Division Corp Ltd, China Construction Fourth Bureau First Construction Engineering Co Ltd filed Critical China Construction Fourth Engineering Division Corp Ltd
Priority to CN202110386362.9A priority Critical patent/CN113073567A/en
Publication of CN113073567A publication Critical patent/CN113073567A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention discloses a counter-force prepressing construction method of a triangular hanging basket, which comprises the following steps of laying a front lower beam and a rear lower beam of the triangular hanging basket, wherein finish-rolled deformed steel bars penetrate through a center-penetrating jack and a front supporting point of a bearing main truss, the rear supporting point of the triangular hanging basket is anchored by the finish-rolled deformed steel bars, the front supporting point finish-rolled deformed steel bars are tensioned, and the tension force is consistent with the load borne by the front supporting point of the hanging basket in the construction stage so as to simulate the stress state of the triangular hanging basket and obtain a first deformation; a jack is added between the front lower cross beam and the rear lower cross beam, a distribution beam is placed on the front lower cross beam and the rear lower cross beam, a steel plate is placed on the distribution beam, pressure is applied to the front lower cross beam and the rear lower cross beam through jacking of the jack so as to simulate the load borne by the distribution beam, and the distribution beam, the front lower cross beam and the rear lower cross beam are pre-pressed to obtain a second deformation; and adjusting the elevation of the template based on the first deformation and the second deformation. The method has the characteristics of convenience and rapidness in operation, high safety, low implementation cost and closer simulation to the real situation.

Description

Triangular hanging basket counter-force prepressing construction method
Technical Field
The invention relates to the technical field of large-span bridge engineering, in particular to a triangular hanging basket counter-force preloading construction method.
Background
In the construction process of the large-span bridge engineering, the continuous bridge is used as an economic and reasonable construction process, and along with the increase of infrastructure construction of the country, a large amount of bridge engineering is invested in construction. In mountainous areas, urban overpasses, canyons, rivers and other areas, large-span continuous beam bridges are built.
In order to ensure the construction safety and the construction quality when the hanging basket is used for carrying out concrete pouring of bridge engineering, prepressing is needed before concrete pouring of the hanging basket, the structural stability of the hanging basket is checked, the inelastic deformation of the hanging basket is eliminated, and parameters are provided for the elevation adjustment of a hanging basket formwork system. The conventional prepressing of the hanging basket is carried out by adopting prepressing blocks, and the hanging basket is high-altitude operation, so that the construction difficulty of the hoisting prepressing blocks is high, the material cost is high, and the real stress condition of the hanging basket can not be simulated.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a triangular cradle counter-force prepressing construction method, which solves the problems of high construction cost and high safety risk caused by the fact that a prepressing block needs to be used for prepressing when the traditional cradle is constructed, and the prepressing block is hoisted to the high altitude, and the stress condition of the cradle cannot be truly simulated.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention discloses a reverse force prepressing construction method of a triangular hanging basket, which comprises the following steps:
laying a front lower cross beam and a rear lower cross beam of the triangular hanging basket, flatly placing a bearing main truss of the triangular hanging basket on the front lower cross beam and the rear lower cross beam, arranging a support at an upright post of the bearing main truss,
the finish-rolled deformed steel bar penetrates through the center-penetrating jack and the front supporting point of the bearing main truss, the rear supporting point of the triangular hanging basket is anchored by the finish-rolled deformed steel bar, the front supporting point finish-rolled deformed steel bar is tensioned, the tension force is consistent with the load borne by the front supporting point of the hanging basket in the construction stage so as to simulate the stress state of the triangular hanging basket, and a first deformation is obtained;
a jack is added between the front lower cross beam and the rear lower cross beam, a distribution beam is placed on the front lower cross beam and the rear lower cross beam, a steel plate is placed on the distribution beam, a second finish-rolled deformed steel bar and a second steel gasket are used for anchoring the steel plate, the front lower cross beam and the rear lower cross beam are stressed by jacking of the jack to simulate the load borne by the distribution beam, and the distribution beam, the front lower cross beam and the rear lower cross beam are pre-pressed to obtain a second deformation;
and adjusting the elevation of the template based on the first deformation and the second deformation.
In the triangular hanging basket counter-force prepressing construction method, the piercing jack, the finish rolling screw-thread steel, the high-strength nut and the steel gasket penetrate through the front fulcrum of the bearing main truss, and the rear fulcrum of the hanging basket is anchored by the finish rolling screw-thread steel, the high-strength nut and the steel gasket.
According to the triangular hanging basket counter-force pre-pressing construction method, a penetrating jack, finish-rolled deformed steel bars, a high-strength nut and a steel gasket penetrate through a front supporting point of a main bearing truss to form a tensioning end located on one side of the penetrating jack and an anchoring end opposite to the tensioning end, the high-strength nut and the steel gasket are anchored at the anchoring end, the high-strength nut is double-nut, and the tensioning end is calibrated before being tensioned.
In the triangular hanging basket counter-force prepressing construction method, a rear fulcrum of the triangular hanging basket is anchored by using finish-rolled deformed steel bars, high-strength nuts and steel gaskets to form anchoring ends on two sides of the rear fulcrum, the high-strength nuts and the steel gaskets are anchored at the anchoring ends, and the high-strength nuts are double nuts.
In the triangular hanging basket counter-force pre-pressing construction method, the bearing main truss comprises two triangular hanging basket bearing main trusses which are horizontally placed on the front lower cross beam and the rear lower cross beam and are symmetrically arranged, and a steel bolster is placed at an upright post between the two triangular hanging basket bearing main trusses for supporting.
In the triangular hanging basket counter-force pre-pressing construction method, the front lower cross beam and the rear lower cross beam are of T-shaped structures and are oppositely arranged.
In the triangular hanging basket counter-force pre-pressing construction method, a first jack is placed at the intersection position of the front lower cross beam and the steel hanging strip, and a second jack is placed at the intersection position of the rear lower cross beam and the rear anchor.
In the reaction force prepressing construction method of the triangular hanging basket, the first deformation and the second deformation are measured by a piezoelectric sensor.
In the triangular hanging basket counter-force pre-pressing construction method, the distributing beams on the front lower cross beam and the rear lower cross beam are respectively and uniformly distributed.
In the reaction force prepressing construction method of the triangular hanging basket, the front lower cross beam and the distribution beams and the steel plates thereon are symmetrically arranged with the rear lower cross beam and the distribution beams and the steel plates thereon.
In the technical scheme, the triangular hanging basket counter-force preloading construction method provided by the invention has the following beneficial effects: the method is simple and convenient to operate by adopting a counter-force prepressing mode, the required materials are all field turnover materials, extra cost is not required to be added, the construction difficulty of cradle prepressing is greatly reduced, the counter-force prepressing can simulate the real stress of the cradle, and the obtained die adjusting data are more accurate. Compared with the prior art, the simulation system has the characteristics of convenience in operation, high safety, low implementation cost and capability of simulating closer to the real situation.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic layout view of a reaction force preloading construction method for a triangular cradle according to an embodiment of the present invention.
Fig. 2 is a schematic layout view of a reaction force preloading construction method for a triangular cradle according to an embodiment of the present invention.
The reference signs are:
the structure comprises a bearing main truss 1, a piercing jack 2, a high-strength nut 3, a steel gasket 4, finish-rolled deformed steel bar 5, a steel bolster 6, a front lower cross beam 7, a steel plate 8, a distribution beam 9, a rear lower cross beam 10, a second nut 3 ', a second steel gasket 4 ' and a second finish-rolled deformed steel bar 5 '.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined 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; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1-2, in one embodiment, the triangular cradle counter-force preloading construction method of the invention comprises,
laying a front lower cross beam 7 and a rear lower cross beam 10 of the triangular cradle, flatly placing a bearing main truss 1 of the triangular cradle on the front lower cross beam 7 and the rear lower cross beam 10, arranging a support at an upright post of the bearing main truss 1,
the finish rolling deformed steel bar 5 penetrates through the center-penetrating jack 2 and the front fulcrum of the bearing main truss 1, the rear fulcrum of the triangular hanging basket is anchored through the finish rolling deformed steel bar 5, the finish rolling deformed steel bar 5 at the front fulcrum is tensioned, the tension force is consistent with the load borne by the front fulcrum of the hanging basket in the construction stage so as to simulate the stress state of the triangular hanging basket, and a first deformation is obtained;
a jack is added between the front lower cross beam 7 and the rear lower cross beam 10, a distribution beam 9 is placed on the front lower cross beam 7 and the rear lower cross beam 10, a steel plate 8 is placed on the distribution beam 9, the steel plate 8 is anchored by using a second finish-rolled deformed steel bar 5 'and a second steel gasket 4', pressure is applied to the front lower cross beam 7 and the rear lower cross beam 10 to simulate the load borne by the distribution beam 9 through jacking of the jack, and the distribution beam 9 and the front and rear lower cross beams 10 are pre-pressed to obtain a second deformation;
and adjusting the elevation of the template based on the first deformation and the second deformation.
The method achieves the aim of pre-pressing the main stress component of the hanging basket under the action of the reaction force by applying stress to the main bearing structure of the hanging basket through the jack and the finish rolling deformed steel bar 5. Can ensure through the pre-compaction that hang the basket structure and can bear construction load, guarantee construction safety, provide deformation parameter for hanging the basket accent mould simultaneously, guarantee bridge construction quality.
In the preferred embodiment of the reaction force prepressing construction of the triangular hanging basket, the penetrating jack 2, the finish rolling deformed steel bar 5, the high-strength nut 3 and the steel gasket 4 penetrate through the front fulcrum of the bearing main truss 1, and the rear fulcrum of the hanging basket is anchored by using the finish rolling deformed steel bar 5, the high-strength nut 3 and the steel gasket 4.
In the preferred embodiment of the reverse force prepressing construction of the triangular hanging basket, a penetrating jack 2, finish rolling deformed steel bars 5, a high-strength nut 3 and a steel gasket 4 penetrate through a front supporting point of a bearing main truss 1 to form a tensioning end positioned on one side of the penetrating jack 2 and an anchoring end corresponding to the tensioning end, the high-strength nut 3 and the steel gasket 4 are anchored at the anchoring end, the high-strength nut 3 is double-nut, and the tensioning end is calibrated before being tensioned.
In the preferred embodiment of the reverse force prepressing construction of the triangular hanging basket, the rear fulcrum of the triangular hanging basket is anchored by using finish rolling deformed steel bars 5, high-strength nuts 3 and steel gaskets 4 to form anchoring ends on two sides of the rear fulcrum, the high-strength nuts 3 and the steel gaskets 4 are anchored at the anchoring ends, and the high-strength nuts 3 are double nuts.
In the preferred embodiment of the triangular hanging basket counter-force prepressing construction, the bearing main truss 1 comprises two triangular hanging basket bearing main trusses 1 which are horizontally placed on a front lower cross beam 7 and a rear lower cross beam 10 and are symmetrically arranged, and a steel bolster 6 is placed at an upright column between the triangular hanging basket bearing main trusses for supporting.
In the preferred embodiment of the reaction force prepressing construction of the triangular cradle, the front lower cross beam 7 and the rear lower cross beam 10 are of T-shaped structures and are oppositely arranged.
In the preferable embodiment of the reaction force prepressing construction of the triangular cradle, a first jack is placed at the intersection position of the front lower beam 7 and the steel sling, and a second jack is placed at the intersection position of the rear lower beam 10 and the rear anchor.
In a preferred embodiment of the reaction force preloading construction of the triangular cradle, the first deformation amount and the second deformation amount are measured by a piezoelectric sensor.
In the preferred embodiment of the reaction force prepressing construction of the triangular cradle, the distributing beams 9 on the front lower cross beam 7 and the rear lower cross beam 10 are respectively and uniformly distributed.
In the preferred embodiment of the reaction force prepressing construction of the triangular cradle, the front lower cross beam 7 and the distribution beams 9 and the steel plates 8 thereon are symmetrically arranged with the rear lower cross beam 10 and the distribution beams 9 and the steel plates 8 thereon.
In one embodiment, fig. 1 is a schematic diagram of prepressing a triangular hanging basket bearing main truss 1, laying hanging basket front and rear lower cross beams 10 in a field, flatly placing the triangular hanging basket bearing main truss 1 on the front and rear lower cross beams 10, placing a steel bolster 6 at an upright column of the bearing main truss 1 for supporting, penetrating a center-penetrating jack 2, a finish-rolling deformed steel bar 5, a high-strength nut 3 and a steel gasket 4 through a front fulcrum of the bearing main truss 1, anchoring the hanging basket rear fulcrum by using the finish-rolling deformed steel bar 5, the high-strength nut 3 and the steel gasket 4, tensioning the front fulcrum finish-rolling deformed steel bar 5 according to calculated load and jack calibration data, and ensuring that the tensioning force is consistent with the load borne in a hanging basket front fulcrum construction stage.
In one embodiment, fig. 2 is a schematic diagram of prepressing of the front lower beam 7, the rear lower beam 10 and the distribution beam 9 of the triangular cradle, and for the counter-force prepressing method of the lower beam and the distribution beam 9 of the bottom cradle, the jacks and the second finish-rolled deformed steel bar 5 are also used for simulating the load bearing in the construction stage. Add the jack between preceding bottom end rail 7 and the back bottom end rail 10, place distributive girder 9 on preceding bottom end rail 7, back bottom end rail 10, place steel sheet 8 on the distributive girder 9, use second finish rolling screw-thread steel 5 'and second steel gasket 4' to anchor steel sheet 8, through the jacking of jack, exert pressure to preceding, back bottom end rail 10, because the anchor of steel sheet 8, with pressure transmission to distributive girder 9, the load that the distributive girder 9 received is simulated, carry out the pre-compaction to distributive girder 9 and preceding, back bottom end rail 10.
In one embodiment, the triangular cradle counter-force pre-pressing construction method adopts counter-force pre-pressing, solves the problems that a pre-pressing block needs to be lifted into the high air in the traditional construction process, the construction cost is high, and the safety management risk is high, and is a great improvement on the traditional construction process. The method comprises the steps of calculating the load of the cradle in the construction stage, obtaining the maximum loads of the front and rear fulcrums of the cradle, the front lower cross beam 7 and the rear lower cross beam 10 under the worst working condition according to the calculation result, using the center-penetrating jack 2 to stretch the finish rolling deformed steel bar 5, simulating the load borne by the cradle in the construction process, and achieving the purpose of pre-pressing the cradle bearing main truss 1, the front and rear lower cross beams 10 and the bottom basket distribution beam 9.
The method comprises the steps that front and rear lower cross beams 10 of a cradle are laid in a field, a triangular cradle bearing main truss 1 is flatly placed on the front and rear lower cross beams 10, a steel bolster 6 is placed at an upright post of the bearing main truss 1 for supporting, a penetrating jack 2, a finish rolling screw-thread steel 5, a high-strength nut 3 and a steel gasket 4 penetrate through a front fulcrum of the bearing main truss 1, the rear fulcrum of the cradle is anchored by the finish rolling screw-thread steel 5, the high-strength nut 3 and the steel gasket 4, the front fulcrum finish rolling screw-thread steel 5 is tensioned according to calculated load and jack calibration data, and the tensioning force is consistent with the load borne by a cradle front fulcrum construction stage.
For the counter-force preloading method of the lower cross beam and the bottom basket distribution beam 9, the jack and the finish-rolled deformed steel bar 5' are also used for simulating the load bearing in the construction stage. Add the jack between preceding bottom end rail 7 and back bottom end rail 10, place distributive girder 9 in the front on preceding, back bottom end rail 10, place steel sheet 8 on distributive girder 9, use second finish rolling screw-thread steel 5 'and second steel gasket 4' to anchor steel sheet 8, through the jacking of jack, exert pressure to preceding bottom end rail 7, back bottom end rail 10, because the anchor of steel sheet 8, with pressure transmission to distributive girder 9, simulate the load that distributive girder 9 receives, carry out the pre-compaction to distributive girder 9 and preceding, back bottom end rail 10. Further, a second finish-rolled deformed steel bar 5 ' penetrates the second steel gasket 4 ' and the second nut 3 ' to anchor the steel plate 8.
The load borne by the construction of the hanging basket is simulated by stretching the finish rolling deformed steel bar and jacking the jack to the counter force of the structure, so that the aim of prepressing the hanging basket is fulfilled. Compared with the traditional method for prepressing the hanging basket by using the prepressing block, the method is more convenient to operate, less in used materials, capable of more accurately simulating the stress state of the hanging basket, capable of obtaining accurate deformation, convenient for adjusting the template height in the construction process, and capable of verifying the bearing capacity of the hanging basket and eliminating inelastic deformation.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (10)

1. A counter-force prepressing construction method of a triangular hanging basket is characterized by comprising the following steps,
laying a front lower cross beam and a rear lower cross beam of the triangular hanging basket, flatly placing a bearing main truss of the triangular hanging basket on the front lower cross beam and the rear lower cross beam, arranging a support at an upright post of the bearing main truss,
the finish-rolled deformed steel bar penetrates through the center-penetrating jack and the front supporting point of the bearing main truss, the rear supporting point of the triangular hanging basket is anchored by the finish-rolled deformed steel bar, the front supporting point finish-rolled deformed steel bar is tensioned, the tension force is consistent with the load borne by the front supporting point of the hanging basket in the construction stage so as to simulate the stress state of the triangular hanging basket, and a first deformation is obtained;
a jack is added between the front lower cross beam and the rear lower cross beam, a distribution beam is placed on the front lower cross beam and the rear lower cross beam, a steel plate is placed on the distribution beam, a second finish-rolled deformed steel bar and a second steel gasket are used for anchoring the steel plate, the front lower cross beam and the rear lower cross beam are stressed by jacking of the jack to simulate the load borne by the distribution beam, and the distribution beam, the front lower cross beam and the rear lower cross beam are pre-pressed to obtain a second deformation;
and adjusting the elevation of the template based on the first deformation and the second deformation.
2. The triangular hanging basket counter-force pre-pressing construction method according to claim 1, characterized in that a center-penetrating jack, finish-rolled deformed steel bars, high-strength nuts and steel gaskets penetrate through a front fulcrum of the bearing main truss, and a rear fulcrum of the hanging basket is anchored by the finish-rolled deformed steel bars, the high-strength nuts and the steel gaskets.
3. The triangular hanging basket counter-force pre-pressing construction method according to claim 2, characterized in that a penetrating jack, finish-rolled deformed steel bars, a high-strength nut and a steel gasket penetrate through a front supporting point of the bearing main truss to form a tensioning end located on one side of the penetrating jack and an anchoring end opposite to the tensioning end, the high-strength nut and the steel gasket are anchored at the anchoring end, the high-strength nut is a double nut, and the tensioning end is calibrated before tensioning.
4. The triangular hanging basket counter-force pre-pressing construction method according to claim 2, characterized in that a rear fulcrum of the triangular hanging basket is anchored by using finish-rolled deformed steel bars, high-strength nuts and steel gaskets to form anchoring ends on two sides of the rear fulcrum, the high-strength nuts and the steel gaskets are anchored at the anchoring ends, and the high-strength nuts are double nuts.
5. The triangular hanging basket counter-force pre-pressing construction method according to claim 2, wherein the bearing main truss comprises two triangular hanging basket bearing main trusses which are horizontally arranged on the front lower cross beam and the rear lower cross beam and are symmetrically arranged, and a steel bolster is placed at an upright column between the two triangular hanging basket bearing main trusses for supporting.
6. The triangular cradle counter-force pre-pressing construction method as claimed in claim 1, wherein the front lower cross beam and the rear lower cross beam are of T-shaped structures and are oppositely arranged.
7. The triangular cradle counter-force pre-pressing construction method as claimed in claim 1, wherein a first jack is placed at a position where the front lower beam and the steel sling intersect, and a second jack is placed at a position where the rear lower beam and the rear anchor intersect.
8. The reaction force preloading construction method of triangular cradle according to claim 1, characterized in that the first and second deformation amounts are measured by a piezoelectric sensor.
9. The triangular cradle counter-force pre-pressing construction method according to claim 1, wherein the distribution beams on the front lower cross beam and the rear lower cross beam are respectively and uniformly distributed.
10. The triangular cradle counter-force pre-pressing construction method according to claim 1, wherein the front lower cross beam and the distribution beams and the steel plates thereon are symmetrically arranged with the rear lower cross beam and the distribution beams and the steel plates thereon.
CN202110386362.9A 2021-04-12 2021-04-12 Triangular hanging basket counter-force prepressing construction method Pending CN113073567A (en)

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