CN114876215B - Integral lifting process of conjoined structure - Google Patents
Integral lifting process of conjoined structure Download PDFInfo
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- CN114876215B CN114876215B CN202210680634.0A CN202210680634A CN114876215B CN 114876215 B CN114876215 B CN 114876215B CN 202210680634 A CN202210680634 A CN 202210680634A CN 114876215 B CN114876215 B CN 114876215B
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The present disclosure relates to a monolithic construction integral lifting process, comprising: assembling the conjoined structure; installing a lifting mechanism and a balancing mechanism, wherein the lifting mechanism is installed on one side of the main body structure facing the conjoined structure, the lifting mechanism is connected with the conjoined structure, the balancing mechanism is installed on one side of the main body structure facing away from the conjoined structure, and initial prestress is applied to the balancing mechanism; the monitoring mechanism is arranged on the top of the main body structure, the lifting mechanism and the balance mechanism; lifting the conjoined structure; the displacement of the main body structure is monitored, so that the top of the main body structure always keeps a basically sidesway-free state or sidesway is controllable; the two ends of the connecting structure are respectively connected and fixed to the main body structures at two sides by the fixing mechanism; and dismantling the lifting mechanism and the balancing mechanism. The utility model discloses a can realize that disjunctor structure promotes fast, safely, and the tower does not have the level basically to move or displacement is controllable in the lifting process and the use.
Description
Technical Field
The disclosure relates to the technical field of building structure construction, in particular to a whole lifting process of a connected structure.
Background
Because of the rapid development of social and economic culture, the requirements of people on the high-altitude conjoined structure are increased, the high-altitude conjoined structure with large span and large space and complex structure is rapidly developed, and various novel high-altitude conjoined structure shapes are also burst, which brings new challenges for the installation and construction method.
In the large-span high-altitude conjoined steel structure, the most frequent structural forms include a steel frame, a steel truss, a net rack and the like. The core of the construction technology of the large-span high-altitude conjoined steel structure is ground assembly, high-altitude hoisting, in-place assembly and the like of structural members. The construction method of the large-span high-altitude conjoined steel structure in China mainly comprises the following steps: high-altitude bulk method, integral hoisting method, integral lifting method, etc.
The high-altitude bulk method needs to set up Man Tanggang pipe scaffold from the ground to the top of the conjoined between two towers, the conjoined position of the high-rise building and the super high-rise building is generally higher, the usage amount of the scaffold is very huge, the setting up and dismantling time is longer, the high-altitude operation is more, the high-altitude drop is extremely easy to cause the scaffold to generate larger lateral movement, instability and insufficient strength in the construction process, and the construction progress and cost control are all affected very adversely.
The integral hoisting method needs to use a plurality of crawler cranes or tower cranes to finish hoisting, the synchronous control problem of the multi-crane hoisting is extremely critical, if the hoisting speeds are inconsistent, the hoisting is poor, so that the hoisting equipment and the structure are unbalanced in stress to cause damage, the hoisting capacity of the hoisting equipment on the construction site is limited, and the tower crane can not meet the hoisting requirement of a large-span steel truss corridor.
The integral lifting method is that after the splicing and assembly of the structure are completed on the ground, the integral structure is integrally lifted to the design position by utilizing the hydraulic lifting device, and the sliding mode construction can be carried out on the structural column in the integral lifting process of the structure. Because a large amount of work can be completed on the ground, multi-point, multi-line and multi-surface line production can be formed, the assembly progress is quickened, the engineering installation precision control is enhanced, the amount of the tool scaffold is reduced, the computer control is synchronously improved, the automation degree is high, the construction period is shortened, and the construction cost is reduced.
In practical projects, one-time integral lifting steel conjoined construction is fast, the installation accuracy is high, the integral lifting method is used more and more, but the integral lifting method has high requirements on assembly sites and hydraulic equipment, electric control and computer control, construction monitoring and the like, and meanwhile, the requirements on construction process simulation checking calculation are required, various adverse working condition envelope designs are considered, the prior preparation matters are complicated, and the integral lifting operation of a large-span high-altitude conjoined steel structure is not easy to complete safely and smoothly. And the lateral deformation of the main building caused by the integral lifting of the conjoined structure can not be basically eliminated, so that potential safety hazards are buried in the construction stage and the use stage of the structure. Therefore, the whole lifting process is required to be optimized so as to ensure that the lifting can be smoothly carried out and meet the requirements of construction and use.
Disclosure of Invention
In order to solve the problems, an object of the present disclosure is to provide a monolithic structure integral lifting process, which can realize that the monolithic structure is lifted fast and safely, and the tower is basically free from horizontal side movement or displacement controllability in the lifting process and the use process.
The above purpose can be achieved by the following technical scheme:
an integral lifting process of a conjoined structure comprises the following steps: splicing the conjoined structure, and splicing the conjoined structure on the ground; installing a lifting mechanism and a balancing mechanism, wherein the lifting mechanism is installed on one side of the main body structure facing the conjoined structure, the lifting mechanism is connected with the conjoined structure, the balancing mechanism is installed on one side of the main body structure facing away from the conjoined structure, and initial prestress is applied to the balancing mechanism; the monitoring mechanism is arranged on the top of the main body structure, the lifting mechanism and the balance mechanism; lifting the conjoined structure, and operating a lifting mechanism to lift the conjoined structure; monitoring the displacement of the main body structure, and monitoring the lateral displacement of the top of the main body structure in real time in the lifting process, so that the top of the main body structure always keeps a side-shifting-free or basically side-shifting-free state, or the side shifting is controllable; after the conjoined structure is lifted to the designed elevation position of the main body structure, installing fixing mechanisms at two ends of the conjoined structure, and connecting and fixing the two ends of the conjoined structure to the main body structures at two sides respectively by the fixing mechanisms; and dismantling the lifting mechanism and the balancing mechanism.
In some embodiments, the conjoined structure assembly further comprises a mounting reinforcing member, wherein the reinforcing member is mounted at a position where two ends of the conjoined structure are connected to the lifting mechanism.
In some embodiments, the lifting mechanism is composed of a lifting support, a lifter and a lifting steel strand, wherein the lifting support is fixedly connected to the main structure, the lifter is fixedly arranged on the lifting support, one end of the lifting steel strand is connected with the lifter, and the other end of the lifting steel strand is connected with the connecting structure.
In some embodiments, the balancing mechanism is composed of a balancing bracket, a tensioner, a balancing steel strand and a balancing support, wherein the balancing bracket is fixedly connected to the main structure, the tensioner is fixedly arranged on the balancing bracket, one end of the balancing steel strand is connected with the tensioner, and the other end of the balancing steel strand is connected with the balancing support.
In some embodiments, the balance support is arranged at the top of the basement, an inverted U-shaped support is arranged at the top of the basement beam or column, the inverted U-shaped support is anchored at the top of the beam or column, and the balance support is connected with the basement foundation through the beam or column.
In some embodiments, the installation monitoring mechanism comprises: installing a photoelectric flexibility meter at the top of the main body structure; installing an optical fiber stress sensor on the lifting steel strand; and installing an optical fiber stress sensor on the balance steel strand.
In some embodiments, the conjoined structure lifting comprises: before the conjoined structure leaves the ground, the lifting force of the lifting mechanism and the balance force of the balance mechanism are increased, and the top of the main body structure is always ensured to be in a state of no displacement or basically 0 displacement; and then lifting the conjoined structure to leave the ground for a certain height, standing for a certain time, and operating the lifting mechanism to start lifting slowly after observing that various indexes are stable.
In some embodiments, the body structure displacement monitoring comprises: monitoring the stress of the lifting steel strand in real time in the lifting process, and monitoring the stress of the balance steel strand in real time; and in response to the increase of the stress of the lifting steel strand, the stress of the balancing steel strand is increased in real time.
In some embodiments, the balance mechanism further comprises a tensioning brace rod, the tensioning brace rod is horizontally connected and fixed at a main structure floor corresponding to the middle position of the balance steel strand, one end of the tensioning brace rod is hinged with the floor slab, the other end of the tensioning brace rod is hinged with the balance steel strand, an adjusting device is arranged at one end of the tensioning brace rod connected with the floor slab, and the length of the Zhang Lacheng rod is adjusted through the adjusting device to apply stress to the balance steel strand.
In some embodiments, the fixing mechanism comprises an embedded member, the embedded member is a truss structure formed by chord member segments and web member segments, the embedded member is arranged between two ends of the conjoined structure and the main body structure, one end of the embedded member is welded with the conjoined structure, and the other end of the embedded member is welded with the extending part of the main body structure.
Compared with the prior art, the beneficial effects of the present disclosure are as follows:
(1) The lifting mechanism and the balance mechanism are matched for use, the lifting process is carefully designed, the influence of each link on the displacement of the top of the tower is considered, the safe lifting of the conjoined structure can be smoothly realized, the construction speed of one-time integral lifting is high, the requirement on construction equipment is low, and the whole lifting operation can be completed only by a plurality of truss structures, steel strands and lifting equipment.
(2) The balance mechanism can eliminate the horizontal side shift of the tower in the construction process, ensure that the horizontal side shift of the tower is 0 or is close to 0 in the construction process, eliminate the additional bending moment generated by lateral bending of the tower under the action of lifting load in the construction process, ensure that the stress of the structural member is basically the axial stress, ensure the safety of the tower structure and ensure the safety and reliability of the structural construction process.
(3) The balance mechanism can eliminate the horizontal side shift of the tower in the use process, when the conjoined structure is connected with the tower, the horizontal side shift of the tower is guaranteed to be 0, so that the actual stress of the structure is consistent with theoretical calculation assumption, the stress of the structure is guaranteed to be consistent with calculation in normal use, normal operation of equipment such as an elevator in the normal use process of the structure is guaranteed, and smooth installation of building curtain walls and the like is guaranteed.
(4) The lifting mechanism and the balancing mechanism adopt cantilever triangle trusses, are convenient to connect with a tower, and can serve as a mounting platform of a lifter and a tensioner and a personnel operating platform.
(5) After lifting in place, the embedded component is connected with the connecting structure, so that the installation accuracy is high.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the disclosure, which is defined by the claims, but rather by the terms of structural modifications, proportions, or values of the dimensions, which are otherwise, used by those skilled in the art, without departing from the spirit and scope of the disclosure.
FIG. 1 is a schematic illustration of a lift initiation state of an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic view of a lift-in-place condition;
FIG. 3 is a diagram of a split-type closure state of a conjoined structure;
FIG. 4 is a schematic view of a lifted and removed condition;
fig. 5 is a schematic overall lifting plan view of a conjoined structure according to an exemplary embodiment of the present disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the present disclosure will be further described in detail below with reference to the embodiments and the accompanying drawings. The illustrative embodiments of the present disclosure and their description herein are intended to explain the present disclosure and are not intended to be limiting of the present disclosure.
In the description of this disclosure, the terms "comprises/comprising," "consisting of … …," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may, if desired, include other elements not expressly listed or inherent to such product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," and the like, does not exclude the presence of other like elements in a product, apparatus, process, or method that includes the element.
It should be understood that, in this disclosure, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, e.g., the disposed manner may be any reasonably feasible arrangement, and the connected may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
It should be further understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "center," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present disclosure and simplifying the description, and do not indicate or imply that the devices, components or structures referred to must have a particular orientation, be constructed or operated in a particular orientation, and are not to be construed as limiting the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The present disclosure relates to a construction method for integrally lifting a connected structure, which is applicable to various connected buildings. The construction system mainly comprises a connected structure and main body structures at two sides of the connected structure, a lifting mechanism, a balancing mechanism, a fixing mechanism and a monitoring mechanism.
The following details the implementation of the integral lifting process of the integrated structure of the present disclosure in conjunction with the specific drawings.
Assembling the conjoined structure:
the integral lifting process of the present disclosure first performs conjoined structure assembly, as shown in fig. 1, to assemble conjoined structure 2 on the ground. The connected structure 2 may be, for example, a steel truss corridor, assembled on the ground and waiting for lifting, the connected structure 2 is located between two adjacent main structures 1, and the main structures 1 are exemplified by a tower.
In some embodiments, the method further comprises installing reinforcing members, and installing reinforcing members 21 at two ends of the connected structure 2. The reinforcement member 21 is installed at a position where both ends of the integrated structure 2 are connected to the lifting mechanism, and reinforces the integrated structure 2 at the position of strength and stability, preventing deformation due to lifting force applied thereto by the lifting mechanism. The reinforcement member 21 is, for example, one or a set of diagonal braces, welded and supported between the chords and/or web members of the steel truss.
Installing a lifting mechanism and a balancing mechanism:
with continued reference to fig. 1, the present disclosure then installs the lifting mechanism 3, the balancing mechanism 4, wherein the lifting mechanism 3 is installed on the side of the main body structure 1 facing the one-piece structure 2 and the lifting mechanism 3 is connected to the one-piece structure 2, the balancing mechanism 4 is installed on the side of the main body structure 1 facing away from the one-piece structure 2, and an initial pre-stress is applied to the balancing mechanism 4.
In some embodiments, the lifting mechanism 3 is composed of a lifting bracket 31, a lifter 32 and a lifting steel strand 33, the lifting bracket 31 is fixedly connected to the main body structure 1, the lifter 32 is fixed on the lifting bracket 31, one end of the lifting steel strand 33 is connected to the lifter 32, and the other end is connected to the main body structure 1.
The lifting support 31 adopts a cantilever triangle steel truss, the section of the steel truss can adopt H-shaped steel or rectangular steel pipes, preferably H-shaped steel, so that the steel truss is conveniently connected with the main body structure 1, is generally connected with a main body structure frame column, is reliably connected with the main body structure, and the section of a steel truss rod piece is calculated and determined according to lifting load. The cantilever triangular steel trusses are oppositely and symmetrically arranged on the two towers and are positioned above the corresponding ends of the conjoined structure, and the number of the cantilever triangular steel trusses is calculated and determined according to the lifting load and the lifting capacity of the lifting device.
The lifter 32 adopts a hydraulic lifter commonly used in the construction technology of lifting and installing building components, mainly comprises an upper anchorage mechanism, a main lifting hydraulic cylinder and a lower anchorage mechanism, and penetrates through a bearing steel strand in the middle, so that the integral synchronous lifting of the components with large tonnage, large span and large area can be realized. The hydraulic lifter is fixed on the lifting bracket 31, and the cantilever ends of the cantilever triangle steel truss are directly above the two ends of the conjoined structure 2 to provide power for the whole lifting mechanism.
One end of the lifting steel strand 33 is connected with the lifter 32, the other end of the lifting steel strand is connected with the conjoined structure 2, and the section of the steel strand is calculated and determined according to the gravity load of the conjoined structure. And the lifting mechanism lifts the conjoined structure to the designed elevation, and the conjoined structure is removed after being installed and fixed.
In some embodiments, the balancing mechanism 4 is composed of a balancing bracket 41, a tensioner 42, a balancing steel strand 43 and a balancing support 44, the balancing bracket 41 is fixedly connected to the main body structure 1, the tensioner 42 is fixedly arranged on the balancing bracket 41, one end of the balancing steel strand 43 is connected with the tensioner 42, and the other end is connected with the balancing support 44.
The arrangement and the number of the balance brackets 41 and the balance steel strands 43 are the same as those of the lifting mechanism, and the installation position of the balance brackets 41 can be at the same height as the lifting bracket 31, and is generally not lower than the height of the lifting bracket 31. The balance bracket 41 adopts a cantilever triangle steel truss, the length of the balance bracket 41 is generally designed to be 2-3 times of that of the lifting bracket 31, the balance tension only needs to be 1/2-1/3 of that of the lifting tension according to the mechanical principle, and the length of the balance bracket can be determined according to the weight of the conjoined structure and the balance weight calculation provided by the balance support.
The tensioner 42 is secured to the balance bracket 41 and the cantilevered ends of the cantilevered triangular steel truss provide the power for the balance mechanism.
The balance steel strand 43 is connected to the balance support 44 at one end and to the tensioner 42 at the other end.
In some embodiments, the balance support 44 is located at the top of the basement 5, an inverted U-shaped support is arranged at the top of the basement beam or column, the support is anchored at the top of the beam or column, preferably the top of the column, and is connected with the basement foundation through the column, the force transmission is directly reliable, and the corresponding beam and column reinforcement is rechecked according to the tension of the balance steel strand.
In the lifting process of the conjoined structure, an additional bending moment is generated on the bottom of the tower by the tensile force of the lifting steel strand, and the tower is obviously moved horizontally under the action of the additional bending moment due to the fact that the tensile force of the lifting steel strand is relatively large, so that the construction safety and the later normal use are affected. The balance mechanism has the functions of eliminating the horizontal lateral movement of the tower caused by the additional bending moment, balancing the additional bending moment of the opposite direction generated by the tension of the steel stranded wires to the tower, and balancing the bending moment generated by the tension of the lifting steel stranded wires to the tower, thereby ensuring that the tower structure cannot generate larger horizontal displacement in the construction process. And the balance mechanism is removed after the conjoined structure is installed and fixed.
For high tower structure, balanced steel strand 43 is longer, when exerting tensioning stress, the steel strand can appear lax, shake, influence tensioning effect, to this kind of phenomenon, this disclosure sets up tensioning brace 45 to balanced mechanism further, tensioning brace 45 horizontal connection fixes the major structure floor department that corresponds at balanced steel strand 43 intermediate position, tensioning brace adopts H shaped steel or steel pipe all can, cross-sectional area is according to calculating the certainty, tensioning brace one end is articulated with the floor, the other end is articulated with balanced steel strand, set up the built-in fitting in tower floor edge is corresponding, tensioning brace connects the one end of floor and sets up adjusting device, adjust the length of Zhang Lacheng pole through adjusting device, can prop up balanced steel strand 43 by sharp state for triangle state, thereby exert the tensioning force to balanced steel strand, be equivalent to shortening the length of balanced steel strand, avoid its lax, shake, obtain stable tensioning effect.
In addition, the tension brace 45 may be used as a backup device for applying stress to the balance steel strand 43, and when the tensioner 42 fails or the tension effect obtained by applying stress to the distal end of the balance steel strand 43 by the tensioner 42 is poor, the tension brace 45 may apply tension stress to the balance steel strand 43 from the middle position thereof by adjusting the length of the tension brace 45.
Installing a monitoring mechanism:
a monitoring mechanism is arranged on the top of the main body structure 1, the lifting mechanism 3 and the balance mechanism 4; the monitoring mechanism comprises a photoelectric flexibility meter 6 arranged at the top of the main body structure 1, an optical fiber stress sensor 7 arranged on the lifting steel strand 33 and an optical fiber stress sensor 7 arranged on the balance steel strand 43.
And (3) lifting the conjoined structure:
as shown in fig. 2, the lifting mechanism 3 is operated to lift the integrated structure 2.
Before the conjoined structure leaves the ground, the lifting force of the lifting mechanism and the balance force of the balance mechanism are increased, a certain proportional relationship is maintained according to the magnitude of force arms at two sides, the equal moment generated at the left side and the right side of the tower is ensured, and the state that the top displacement of the main body structure is basically 0 is always ensured.
After the connected structure is lifted to a certain height away from the ground, for example, the height is 1m away from the ground, the connected structure is kept stand for a certain time, preferably not less than 24 hours, various indexes such as steel strand stress and the like are observed, the safety of a hoisting system is detected, and after the connected structure is stabilized, the lifting mechanism is operated to start lifting slowly, so that serious consequences caused by lifting the connected structure to a high-altitude position to fall are prevented until the connected structure is lifted to a design position.
And (3) monitoring the displacement of the main body structure:
in the lifting process, the lateral displacement of the top of the main body structure 1 is monitored in real time through the photoelectric flexibility gauge 6 at the top of the main body structure 1, and the top of the main body structure 1 always keeps a state without lateral movement or in a small displacement state, so that the lateral movement is ensured to be controllable.
In some embodiments, the stress of the lifting steel strand 33 is also monitored in real time during the lifting process by the optical fiber stress sensor 7 mounted on the lifting steel strand 33, and the stress of the balancing steel strand 43 is monitored in real time by the optical fiber stress sensor 7 mounted on the balancing steel strand 43; monitoring the stress of the lifting steel strand 33 to ensure that the stress does not exceed the design value of the bearing capacity, so that the lifting steel strand is in an elastic working state, and ensuring the safety of the construction process; as the lifting continues, the stress of the lifting steel strand 33 gradually increases, the stress of the lifting steel strand 33 is compared by synchronously monitoring the stress of the balancing steel strand 43, and the stress of the balancing steel strand is increased in real time in response to the increase of the stress of the lifting steel strand, so that the tension force of the balancing steel strand can be balanced with the bending moment generated by the tension force of the lifting steel strand on the tower. The monitoring stress can ensure the safety of the lifting structure in the construction process, and the lifting force and the balance force can be calculated, so that the horizontal displacement of the tower can be controlled to be 0 in theory.
The monitoring mechanism of the present disclosure preferably employs a monitoring and assessment system that includes both hardware and software aspects. The hardware equipment mainly comprises the optical fiber stress sensor, a demodulator, a photoelectric deflectometer, a computer server, a portable computer and the like. The software mainly comprises various monitoring project matched software, a database, a data management system and a working state comprehensive evaluation system. The displacement of the top of the tower in the lifting process can be monitored in real time through the monitoring and evaluating system, and the stress of the balanced steel strand can be adjusted according to the displacement, so that the displacement of the top of the tower structure is basically in a 0 displacement state in the whole lifting process, the generation of larger horizontal displacement of the tower structure is avoided, the unrecoverable plastic deformation is generated, and the structural safety is ensured.
And (3) installing and fixing a mechanism:
as shown in fig. 3, after the integrated structure 2 is lifted to the designed elevation position of the main structure 1, fixing mechanisms 8 are installed at two ends of the integrated structure 2, and the two ends of the integrated structure are respectively connected and fixed to the main structures at two sides by the fixing mechanisms 8.
In the present disclosure, the fixing mechanism 8 includes an embedding member, which is installed between two ends of the integrated structure 2 and the main structure 1, and connects the integrated structure 2 and the main structure 1 respectively.
The embedded member is a truss structure formed by chord member segments and web member segments, the section of the rod piece can be H-shaped steel or rectangular steel pipes, preferably H-shaped steel, so that the embedded member is conveniently connected with the main body structure, and the section size of the rod piece is determined according to calculation. One end of the embedded member is welded with the extending part of the main body structure, and the other end is welded with the conjoined structure. The fixed mechanism is used for lifting the conjoined structure to a designed elevation by the lifting mechanism, and the fixed mechanism connects the conjoined structure and the towers on two sides into a whole.
Dismantling the lifting mechanism and the balancing mechanism:
after the connected structure 2 is lifted in place and fixed, the lifting mechanism 3 and the balance mechanism 4 can be removed.
The balance mechanism can eliminate the horizontal lateral movement of the tower in the construction process in the lifting process, and ensure the safety of the tower structure; the horizontal side shifting of the tower in the use process can be eliminated, the normal operation of equipment such as an elevator in the normal use process of the structure is ensured, and the smooth installation of building curtain walls and the like is ensured.
The integral lifting system used in the integral lifting process of the conjoined structure comprises:
the lifting mechanism is arranged on one side of the main body structure facing the conjoined structure and is connected with the conjoined structure for lifting the conjoined structure;
the balance mechanism is arranged on one side of the main body structure, which is opposite to the conjoined structure, and is used for counteracting the additional bending moment generated by the tensile force of the lifting mechanism on the bottom of the main body structure, and the balance mechanism is applied with prestress in the initial state;
the monitoring mechanism is arranged on the top of the main body structure, the lifting mechanism and the balancing mechanism and is used for monitoring the horizontal displacement of the top of the main body structure in the lifting process in real time and monitoring the lifting load of the lifting mechanism and the stress of the balancing mechanism in real time.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
The foregoing description of the preferred embodiments of the present disclosure is not intended to limit the disclosure, but is intended to cover any modifications, equivalents, and alternatives falling within the spirit and principles of the present disclosure.
Claims (10)
1. The integral lifting process of the conjoined structure is characterized by comprising the following steps of:
splicing the conjoined structure, and splicing the conjoined structure on the ground;
installing a lifting mechanism and a balancing mechanism, wherein the lifting mechanism is installed on one side of the main body structure facing the conjoined structure, the lifting mechanism is connected with the conjoined structure, the balancing mechanism is installed on one side of the main body structure facing away from the conjoined structure, and initial prestress is applied to the balancing mechanism;
the monitoring mechanism is arranged on the top of the main body structure, the lifting mechanism and the balance mechanism;
lifting the conjoined structure, and operating a lifting mechanism to lift the conjoined structure;
monitoring the displacement of the main body structure, and monitoring the lateral displacement of the top of the main body structure in real time in the lifting process, so that the top of the main body structure always keeps a side-shifting-free or basically side-shifting-free state, or the side shifting is controllable;
after the conjoined structure is lifted to the designed elevation position of the main body structure, installing fixing mechanisms at two ends of the conjoined structure, and connecting and fixing the two ends of the conjoined structure to the main body structures at two sides respectively by the fixing mechanisms;
and dismantling the lifting mechanism and the balancing mechanism.
2. The integrated lifting process of claim 1, wherein:
the conjoined structure assembly further comprises a mounting reinforcing member, wherein the reinforcing member is mounted at the position where the two ends of the conjoined structure are connected with the lifting mechanism.
3. The integrated lifting process of claim 1, wherein:
the lifting mechanism consists of a lifting support, a lifter and a lifting steel strand, wherein the lifting support is connected and fixed to the main structure, the lifter is fixed on the lifting support, one end of the lifting steel strand is connected with the lifter, and the other end of the lifting steel strand is connected with the connecting structure.
4. The integrated lifting process of claim 1, wherein:
the balance mechanism consists of a balance bracket, a tensioner, a balance steel strand and a balance support, wherein the balance bracket is fixedly connected to the main structure, the tensioner is fixedly arranged on the balance bracket, one end of the balance steel strand is connected with the tensioner, and the other end of the balance steel strand is connected with the balance support.
5. The integrated lifting process of claim 4, wherein:
the balance support is arranged at the top of the basement, an inverted U-shaped support is arranged at the top of the basement beam or column, the inverted U-shaped support is anchored at the top of the beam or column, and the balance support is connected with the basement foundation through the beam or column.
6. The integrated lifting process of claim 4, wherein:
the installation monitoring mechanism includes:
installing a photoelectric flexibility meter at the top of the main body structure;
installing an optical fiber stress sensor on the lifting steel strand;
and installing an optical fiber stress sensor on the balance steel strand.
7. The integrated lifting process of claim 1, wherein:
the conjoined structure lifting comprises: before the conjoined structure leaves the ground, the lifting force of the lifting mechanism and the balance force of the balance mechanism are increased, and the top of the main body structure is always ensured to be in a state of no displacement or basically 0 displacement; and then lifting the conjoined structure to leave the ground for a certain height, standing for a certain time, and operating the lifting mechanism to start lifting slowly after observing that various indexes are stable.
8. The integrated lifting process of claim 4, wherein:
the main body structure displacement monitoring comprises:
monitoring the stress of the lifting steel strand in real time in the lifting process, and monitoring the stress of the balance steel strand in real time;
and in response to the increase of the stress of the lifting steel strand, the stress of the balancing steel strand is increased in real time.
9. The integrated lifting process of claim 4, wherein:
the balance mechanism further comprises a tensioning stay bar, the tensioning stay bar is horizontally connected and fixed at a main structure floor corresponding to the middle position of the balance steel strand, one end of the tensioning stay bar is hinged to the floor, the other end of the tensioning stay bar is hinged to the balance steel strand, an adjusting device is arranged at one end, connected with the floor, of the tensioning stay bar, and the length of the Zhang Lacheng bar is adjusted through the adjusting device to apply stress to the balance steel strand.
10. The integrated lifting process of claim 1, wherein:
the fixing mechanism comprises an embedded component, the embedded component is a truss structure formed by chord member segments and web member segments, the embedded component is arranged between two ends of the conjoined structure and the main body structure, one end of the embedded component is welded with the conjoined structure, and the other end of the embedded component is welded with the extending part of the main body structure.
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