CN119243589B - Large-span floor arch structure installation method with arch foot prestress balance cable - Google Patents
Large-span floor arch structure installation method with arch foot prestress balance cableInfo
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- CN119243589B CN119243589B CN202411506751.0A CN202411506751A CN119243589B CN 119243589 B CN119243589 B CN 119243589B CN 202411506751 A CN202411506751 A CN 202411506751A CN 119243589 B CN119243589 B CN 119243589B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D12/00—Bridges characterised by a combination of structures not covered as a whole by a single one of groups E01D2/00 - E01D11/00
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
一种带拱脚预应力平衡索的大跨度落地拱结构安装方法，包括以下步骤：步骤1：分区确定；步骤2：拱脚预应力第一次张拉；步骤3：拱脚段安装；步骤4：整体吊装段施工：地面将整体吊装段组拼焊接，于整体吊装段下弦安装临时张拉组件，对整体吊装段进行张拉，张拉值为整体吊装段端部产生的水平推力值；于落地拱结构的整体吊装段区域的两端分别安装提升架，整体吊装段每端的两侧对称设置一组提升架，提升架上安装提升组件，通过提升组件将整体吊装段提升就位；步骤5：合拢段安装；步骤6：卸载；步骤7：张拉。本申请通过多种施工工艺的紧密组合，提高了落地拱结构的安装效率，实现了较低措施成本的投入，经济性良好。
A method for installing a large-span ground arch structure with a prestressed balance cable at an arch foot comprises the following steps: Step 1: Determine the partition; Step 2: Tension the prestress of the arch foot for the first time; Step 3: Install the arch foot section; Step 4: Construction of the overall hoisting section: assemble and weld the overall hoisting section on the ground, install a temporary tensioning component on the lower chord of the overall hoisting section, tension the overall hoisting section, and the tensioning value is the horizontal thrust value generated at the end of the overall hoisting section; install lifting frames at both ends of the overall hoisting section area of the ground arch structure, and symmetrically set a group of lifting frames on both sides of each end of the overall hoisting section, install lifting components on the lifting frames, and lift the overall hoisting section into place through the lifting components; Step 5: Install the closing section; Step 6: Unloading; Step 7: Tensioning. This application improves the installation efficiency of the ground arch structure through the close combination of multiple construction processes, achieves a low investment in measures cost, and has good economy.
Description
Technical Field
The invention relates to the technical field of floor arch installation, in particular to a method for installing a large-span floor arch structure with arch foot prestress balance cables.
Background
The floor arch structure is commonly used in the construction of bridges, industries, door arches and the like, such as Zhao Zhouqiao arch bridges of ancient and modern civilization, and the floor arch structure is also used in the public construction with large space function requirements at present, and is used as a sign building entrance of a convention venue, a railway station and the like. The arch structure solves the problem of side thrust of the arch structure by additionally arranging the prestress balance rope at the lower part, optimizes the steel consumption of the structure, but solves the construction problems of high structure, large span, large component weight and the like caused by the structure, and the traditional construction scheme has the problems of multiple high-altitude operation, high construction measure cost, long construction period, high safety, high quality control difficulty and the like.
Disclosure of Invention
The invention provides a large-span floor arch structure installation method with arch foot prestress balance cables, which adopts a combination of arch foot in-situ installation, integral lifting of middle sections and permanent temporary combination of prestress cables with step-by-step tensioning, solves the problems of more high-altitude operation, large positioning difficulty and low construction efficiency, and realizes safe, efficient and lean construction.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which comprises the following steps:
Dividing a floor arch structure into a pier seat, an arch foot section, a folding section and an integral hoisting section, wherein the arch foot section is arranged on the pier seat, and the folding section is connected with the arch foot section and the integral hoisting section;
step 2, arch springing prestress first tensioning, namely connecting a concrete pull beam between two pier seats, arranging a prestress cable in the concrete pull beam, and tensioning the prestress cable for the first time, wherein the tensioning value is a horizontal thrust value generated by the floor arch structure under the dead weight state;
Step 3, installing arch springing segments, namely installing the arch springing segments by adopting a high-altitude in-situ bulk loading method;
Step 4, constructing the integral hoisting section, namely splicing and welding the integral hoisting section on the ground, installing a temporary tensioning assembly on the lower chord of the integral hoisting section, and tensioning the integral hoisting section, wherein the tensioning value is a horizontal thrust value generated at the end part of the integral hoisting section;
Lifting frames are respectively arranged at two ends of an integral lifting section area of the floor arch structure, a group of lifting frames are symmetrically arranged at two sides of each end of the integral lifting section, lifting assemblies are arranged on the lifting frames, and the integral lifting section is lifted into position through the lifting assemblies;
Step 5, installing the folding sections, namely splitting the folding sections, splicing the split units on the ground, embedding the split units into the high altitude by using a crane, installing the lower chord split first and then installing the upper chord split when the folding sections are folded, and synchronously folding the folding sections at the two ends of the floor arch structure to form a floor arch structure effect after the folding sections are completed;
unloading, namely unloading the floor arch structure in a step-by-step unloading mode through the lifting assembly;
and 7, tensioning the prestressed cable after the floor arch structure is installed and unloaded, wherein the tensioning value is offset with the horizontal thrust of the floor arch structure.
By adopting the scheme, the floor arch structure is reasonably partitioned, the combined scheme of arch foot section high-altitude in-situ installation, middle section integral hoisting and closure section block hoisting is adopted, the floor arch structure is installed by combining the combination of the pre-stress inhaul cable and the step-by-step tensioning, the installation precision and the structural performance of the floor arch structure are ensured, and the problems of multiple high-altitude operation, high positioning difficulty and low construction efficiency are solved.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which comprises the following steps of in step 2, tensioning the prestress cables at two ends, tensioning one end, and then tensioning the other end, wherein the prestress cables in all pore channels are sequentially tensioned from bottom to top in the tensioning process.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which comprises the following steps of arranging a temporary supporting jig under an arch foot section to support the arch foot section, and erecting a steel plate net platform under the arch foot section for a worker to stand on the steel plate net platform to install the arch foot section.
Through adopting above-mentioned scheme, to arch springing section member local cross-section big, single component weight is big, adopts the problem of whole hoist and mount difficulty, adopts the scheme of high altitude normal position installation to based on interim support bed-jig installation steel sheet net platform assist arch springing section installation, solve because of arch springing section structure complicacy, use the inconvenient problem of crank arm car.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which is characterized in that the steel plate net platform comprises longitudinal beams, cross beams and a steel net, wherein the longitudinal beams are connected between pier bases and temporary supporting jig frames, between the temporary supporting jig frames and between the temporary supporting jig frames, the cross beams are connected between the longitudinal beams to integrally connect a plurality of longitudinal beams, and the steel net is paved on a frame body structure formed by the longitudinal beams and the cross beams to form a working platform.
Through adopting above-mentioned scheme, through connecting the longeron on interim support bed-jig and forming simple and easy work platform, the staff stands and carries out the installation of arch springing section on work platform, and work platform simple structure, installation are convenient, have improved the installation effectiveness of arch springing section.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which comprises the following steps that in step4, a temporary tensioning assembly comprises temporary inhaul cables connected to the two ends of a lower chord of an integral hoisting section, oil cylinders arranged at the two ends of the temporary inhaul cables, and an anchor for connecting the oil cylinders with the integral hoisting section.
By adopting the scheme, because the integral hoisting section can have tension in the hoisting stage, the problem of inconsistent tension values of two sides exists due to inconsistent horizontal heights of the inner arch and the outer arch, and the tension of the integral hoisting section is controlled by installing the temporary inhaul cable, so that the air form and the stable state in the hoisting process are conveniently controlled, and the installation of the folding section is facilitated.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which comprises the following steps that in the step 4, lifting frames are assembled by a plurality of groups of lattice type standard sections, and the top of each group of lifting frames are respectively provided with a profile steel conversion platform.
By adopting the scheme, the standard structure is adopted for assembly, so that the assembly and disassembly are convenient, and the recycling can be realized.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which is characterized in that the lifting assembly comprises a transition beam, a conversion beam, a joist, lifting beams and lifting cylinders, wherein the joist is arranged on the conversion beam in a crossing way by two lifting frames, the conversion beam is arranged on at least two groups of transition beams on the same lifting frame, and the transition beams are arranged on a profile steel platform;
the lifting beams are installed on the joists at intervals, and the lifting oil cylinders are installed on the lifting beams and used for lifting the integral lifting sections.
Through adopting above-mentioned scheme, promote the integral hoisting section through the lift cylinder and take one's place to the lift cylinder can also be used as follow-up arch structure uninstallation, and the operation is more convenient.
The invention discloses a method for installing a large-span floor arch structure with arch foot prestress balance cables, which comprises the following steps of in step 6, adjusting lifting counter forces of all lifting cylinders at intervals of 10%, decreasing the lifting counter forces in sequence, adjusting the lifting counter forces of all the lifting cylinders to 0kN in ten times, removing lifting assemblies and lifting frames, and unloading.
The invention relates to a method for installing a large-span floor arch structure with arch foot prestress balance cables, which further comprises the following steps of,
Through adopting above-mentioned scheme, through unloading the lift cylinder step by step, guarantee the stability that the arch structure was changed from the promotion state to dead weight state.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the application, through the tight combination of a plurality of construction processes, the installation efficiency of the floor arch structure is improved, the investment of lower measure cost is realized, and the economy is good;
2. compared with the conventional method, the method has the advantages that the high-altitude workload of operators is small, and the operation safety risk of constructors is low;
3. The application adopts a construction process combining a temporary inhaul cable and a permanent pre-stress inhaul cable tensioning procedure, improves the quality control and the structural safety in the construction process, ensures that the structural deformation generated in the lifting process of the floor arch of the integral lifting section in the construction process is counteracted by the measure of the temporary inhaul cable, ensures that the structure has no deformation influence after the lifting is in place, and ensures that the structural safety is that the horizontal thrust generated when the floor arch structure enters the designed dead weight state after the construction forming is counteracted by the permanent pre-stress inhaul cable, thereby avoiding the permanent structural deformation.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the floor arch structure of the present invention in its installed configuration;
FIG. 2 is a schematic view of the structure of the temporary support jig and steel mesh platform of the present invention installed in the arch springing section;
FIG. 3 is a schematic view of the distribution structure of the support jig of the present invention;
FIG. 4 is a schematic view of the ground assembly structure of the integral hoisting section of the invention;
FIG. 5 is a schematic view of the mounting structure of the lifting frame and lifting assembly of the present invention;
FIG. 6 is a schematic view of the lifting structure of the integral lifting section of the invention;
FIG. 7 is a schematic view of a closure segment mounting structure of the present invention;
FIG. 8 is a schematic view of a lifting frame and lifting assembly of the present invention;
FIG. 9 is a schematic view of a lift assembly according to the present invention;
FIG. 10 is a schematic view of the structure of the support matrix of the present invention;
FIG. 11 is a schematic view of a temporary tensioning assembly according to the present invention.
Reference numerals:
1. Pier seat, 2, arch leg section, 3, closure section, 4, integral hoisting section, 5, prestress guy cable, 6, temporary supporting jig frame, 7, steel plate net platform, 7.1, longitudinal beam, 7.2, cross beam, 8, supporting jig frame, 9, temporary tensioning component, 9.1, temporary guy cable, 9.2, oil cylinder, 9.3, anchor, 10, lifting frame, 11, section steel platform, 12, lifting component, 12.1, transition beam, 12.2, conversion beam, 12.3, joist, 12.4, lifting beam, 12.5, lifting oil cylinder, 12.6 and lifting cable.
Detailed Description
As shown in fig. 1-11, the invention discloses a method for installing a large-span floor arch structure with arch foot prestress balance ropes, which comprises the following steps of;
The method comprises the steps of 1, determining a partition, namely, the floor arch structure is of a gradually changed quadrilateral structure, two ends of the floor arch structure are arranged on pier seats, dividing the floor arch structure into arch foot sections, folding sections and integral hoisting sections, carrying out in-situ installation, block lifting and high-altitude folding on the floor arch structure, carrying out three-partition operation on the floor arch structure, adopting construction simulation software for checking and calculating the whole construction process, ensuring the feasibility of a scheme, wherein the stages of arch foot prestress tensioning, middle section block lifting, high-altitude folding, unloading and the like are all carried out calculation and analysis to enable the construction completion state to be consistent with the design state, determining relevant construction measure parameters, and mainly aiming at specific specification parameter values of construction measure tool materials, tools and the like, obtaining the requirement of bearing capacity of an operation site and the installation and dismantling sequence of temporary measures, and guiding actual construction.
And 2, pre-stressing the arch feet for the first time, namely, because the span of the floor arch structure is large and the loading area is large, the horizontal thrust of the generated arch feet has a large burden on pile foundations, in order to resist the horizontal thrust of the arch feet, a concrete pull beam is connected between two pier seats, a pre-stressing cable is arranged in the concrete pull beam, the horizontal thrust generated by the floor arch structure is balanced, the pier seats and basement structures at two sides are required to be completely separated, the construction of pier seat concrete pouring, floor arch structure lower steel rib installation, concrete pull beam pouring and pre-stressing cable installation is completed, after the pier seats and concrete pull beam concrete strength reach 100%, the pre-stressing cable is tensioned for the first time, the two ends of the pre-stressing cable are tensioned, after one end is tensioned, the other end is tensioned, and the pre-stressing cables in all pore channels are sequentially tensioned from bottom to top in the tensioning process until the pre-stressing value reaches the horizontal thrust value generated by the floor arch structure to be stopped.
The method comprises the steps of installing arch foot sections, wherein the arch foot sections are large in local section and heavy in single component weight, the whole section is heavy in hoisting weight after the ground is assembled, the hoisting is difficult, the method of installing temporary support tire frames in high-altitude in-situ bulk loading is adopted, due to the fact that the arch foot sections are complex in structure and inconvenient to use, a steel plate net platform is erected below the arch foot sections and matched with the high-altitude butt joint of arch foot sections for installing, welding, detecting and folding sections, the steel plate net platform comprises longitudinal beams, cross beams and steel nets, the longitudinal beams are connected between pier seats and the temporary support tire frames, the temporary support tire frames and the temporary support tire frames, the cross beams are connected between the longitudinal beams to connect a plurality of longitudinal beams into a whole, the steel nets are paved on a frame structure formed by the longitudinal beams and the cross beams, and workers stand on the working platform to install the arch foot sections.
And 4, constructing an integral hoisting section, namely hoisting the integral hoisting section to the supporting jig frame for assembly welding after the integral hoisting section is assembled and welded on the supporting jig frame for convenience in quickly butting the floor arch structure at high altitude and reducing the construction period of the integral floor arch structure, wherein the integral hoisting section is assembled and welded on the supporting jig frame by using a hoisting machine after the integral hoisting section is segmented on the ground and assembled and welded after the integral hoisting section is segmented on the ground due to the large section of the rod piece of the floor arch structure and the large weight of a single component. After the welding is completed, a temporary tensioning assembly is arranged on the lower chord of the integral hoisting section, the temporary tensioning assembly comprises temporary inhaul cables connected to the two ends of the lower chord of the integral hoisting section, oil cylinders arranged at the two ends of the temporary inhaul cables and an anchorage device for connecting the oil cylinders with the integral hoisting section, and after the integral hoisting section is assembled, the integral hoisting section is tensioned through the temporary tensioning assembly, wherein the tensioning value is a horizontal thrust value generated by the end part of the integral hoisting section. The temporary cable tensioning aims to control the air posture or structural deformation of the integral hoisting section, the arch structure can generate tension to two sides after the integral hoisting section is separated from the supporting jig frame, the temporary cable tensioning is used for counteracting the horizontal thrust generated by the arch structure of the integral hoisting section in a dead weight state and a lifting loading state, the arch structure does not generate structural deformation caused by construction in the lifting process and after in-place, and the tensioning of the temporary construction cable is released after the integral floor arch is folded.
The supporting jig frame uses a roadbed box as a foundation, three rows of upright posts are arranged at each supporting point for the convenience of the inhaul cable setting of the integral hoisting section, joists are installed on the upright posts, and section steel is used between the joists and the integral hoisting section to adjust elevation.
The lifting frames are respectively arranged at two ends of an integral lifting section area of the floor arch structure, two sides of each end of the integral lifting section are symmetrically provided with a group of lifting frames, the lifting frames are assembled by a plurality of groups of lattice type standard sections, the lattice type standard sections are assembled and butt-jointed by adopting flange plate penetrating screws, the top and the bottom of each group of lifting frames are respectively provided with an H-shaped steel conversion platform, and the section steel platforms mainly support the upright posts of the lifting frames under stress and transfer the force to the foundation of the roadbed box, the bottom of the lifting frames adopts the roadbed box as the foundation, and the placement of the roadbed box needs to avoid the prestress inhaul cables between pier seats.
The lifting assembly is arranged at the top of the lifting frame and comprises transition beams, conversion beams, joists, lifting beams and lifting cylinders, wherein the transition beams are arranged on a profile steel platform, the conversion Liang Jiali is arranged on two groups of transition beams on the same lifting frame, the joists are arranged on the conversion beams in a crossing manner and are arranged in a double-spliced manner, a space for a lifting rope of the lifting cylinders to pass through is formed between the two joists, the lifting beams are arranged on the joists, the lifting cylinders are arranged on the lifting beams, one ends of the lifting ropes are connected with the lifting cylinders, the other ends of the lifting ropes are connected with the integral lifting sections, the number of lifting points and the type of the lifting cylinders are determined according to the lifting weight, and the safety coefficient is considered to be not less than 1.2.
And 5, installing the folding sections, namely, because the large-span floor arch structure is long in span, the steel structure is high in heat conduction efficiency and is greatly influenced by temperature load, analyzing the highest temperature and the lowest temperature of the ground of the engineering, the folding temperature is preferably 15 ℃ plus or minus 5 ℃, dividing the folding sections into pieces, assembling small spliced units on the ground, embedding and supplementing the crane split pieces at high altitude, installing the lower chord split pieces firstly, installing the upper chord split pieces when the floor arch structure is folded, and synchronously folding the folding sections at the two ends of the floor arch structure to form the floor arch structure effect after the completion of the process.
Step 6, unloading, namely, the process of unloading the floor arch structure is actually a process of converting the structure from a lifting system to a self-supporting system, and unloading is carried out by using a step-by-step load-reducing method of a lifting oil cylinder, wherein the unloading process comprises three steps:
1) The floor arch structure is completely installed, the welding work at all positions is required to be completed, welding seam flaw detection personnel are required to detect 100% of welding seams, the quality of the welding seams meets the design requirement, and the welding seams are unloaded after the welding seam quality is qualified and the whole welding seam is stable;
2) Simultaneously adjusting the lifting counterforces of all the lifting cylinders at intervals of 10%, decreasing the lifting counterforces in sequence, and adjusting the lifting counterforces of all the lifting cylinders to 0kN for ten times;
3) And (5) dismantling the lifting assembly and the lifting frame, and finishing unloading.
And 7, tensioning the prestressed cable according to the construction progress and the actual change of the load of the floor arch structure, so as to ensure the structural stability and safety of the floor arch structure in the whole construction process, tensioning the prestressed cable after the floor arch structure is installed and unloaded, wherein the tensioning value is counteracted with the horizontal thrust of the floor arch structure to reduce the influence of the dead weight of the whole floor arch structure on the horizontal thrust of a pile foundation, and the first tensioning is pretensioned to satisfy the purpose of counteracting the dead weight of the floor arch structure, and the second tensioning is pretensioned to counteract other loads applied to the floor arch structure.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (6)
1. The installation method of the large-span floor arch structure with the arch foot prestress balance rope is characterized by comprising the following steps of:
Dividing a floor arch structure into a pier seat, an arch foot section, a folding section and an integral hoisting section, wherein the arch foot section is arranged on the pier seat, and the folding section is connected with the arch foot section and the integral hoisting section;
step 2, arch springing prestress first tensioning, namely connecting a concrete pull beam between two pier seats, arranging a prestress cable in the concrete pull beam, and tensioning the prestress cable for the first time, wherein the tensioning value is a horizontal thrust value generated by the floor arch structure under the dead weight state;
Step 3, installing arch springing segments, namely installing the arch springing segments by adopting a high-altitude in-situ bulk loading method;
Step 4, constructing the integral hoisting section, namely splicing and welding the integral hoisting section on the ground, installing a temporary tensioning assembly on the lower chord of the integral hoisting section, and tensioning the integral hoisting section, wherein the tensioning value is a horizontal thrust value generated at the end part of the integral hoisting section;
Lifting frames are respectively arranged at two ends of an integral lifting section area of the floor arch structure, a group of lifting frames are symmetrically arranged at two sides of each end of the integral lifting section, lifting assemblies are arranged on the lifting frames, and the integral lifting section is lifted into position through the lifting assemblies;
Step 5, installing the folding sections, namely splitting the folding sections, splicing the split units on the ground, embedding the split units into the high altitude by using a crane, installing the lower chord split first and then installing the upper chord split when the folding sections are folded, and synchronously folding the folding sections at the two ends of the floor arch structure to form a floor arch structure effect after the folding sections are completed;
unloading, namely unloading the floor arch structure in a step-by-step unloading mode through the lifting assembly;
Step 7, tensioning, namely tensioning the prestressed inhaul cable after the floor arch structure is installed and unloaded, wherein the tensioning value is counteracted with the horizontal thrust of the floor arch structure;
Wherein, in step 3, set up interim support bed-jig in the below of arch foot section and support the arch foot section to set up the steel sheet net platform in arch foot section below and be used for the staff to stand on the steel sheet net platform and install the arch foot section, the steel sheet net platform includes longeron, crossbeam and steel mesh, the longeron is connected between pier base and interim support bed-jig, interim support bed-jig and interim support bed-jig, the crossbeam is connected and is connected into whole many longerons between the longeron, the steel mesh is laid on the support body structure that longeron and crossbeam constitute and is formed work platform.
2. The method for installing the large-span floor arch structure with the arch springing prestress balance rope, which is disclosed in claim 1, is characterized in that in the step 2, the prestress rope is stretched by stretching two ends, after one end is stretched, the other end is subjected to the additional stretching, and in the stretching process, the prestress ropes in all pore channels are sequentially stretched from bottom to top.
3. The method for installing a large-span floor arch structure with arch bar prestress balance ropes according to claim 1, wherein in step 4, the temporary tensioning assembly comprises temporary inhaul cables connected to two ends of a lower chord of the integral hoisting section, oil cylinders arranged at two ends of the temporary inhaul cables, and an anchorage device for connecting the oil cylinders and the integral hoisting section.
4. The method for installing the large-span floor arch structure with the arch foot prestress balance rope according to claim 1, wherein in the step 4, lifting frames are assembled by a plurality of groups of lattice standard sections, and the top and the bottom of each group of lifting frames are respectively provided with a profile steel conversion platform.
5. The method for installing a large-span floor arch structure with arch foot prestress balance ropes according to claim 1, wherein the lifting assembly comprises a transition beam, a conversion beam, a joist, a lifting beam and a lifting cylinder, wherein the joist spans two lifting frames and is installed on the conversion beam, the conversion beam is installed on at least two groups of transition beams on the same lifting frame, and the transition beams are installed on a profile steel platform;
the lifting beams are installed on the joists at intervals, and the lifting oil cylinders are installed on the lifting beams and used for lifting the integral lifting sections.
6. The method for installing the large-span floor arch structure with the arch foot prestress balance cable is characterized in that in the step 6, lifting counter forces of all lifting cylinders are adjusted at intervals of 10%, the lifting counter forces of all the lifting cylinders are decreased in sequence and adjusted to 0kN in ten times, and the lifting assembly and the lifting frame are dismounted.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777043A (en) * | 2012-08-03 | 2012-11-14 | 浙江精工钢结构有限公司 | Construction method for lifting arch structure in zero-deformation state |
| KR20130120698A (en) * | 2012-04-26 | 2013-11-05 | 주식회사 디에스글로벌이엔씨 | Method of constructing arch-type ribbon bridge and bridge using same |
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- 2024-10-28 CN CN202411506751.0A patent/CN119243589B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130120698A (en) * | 2012-04-26 | 2013-11-05 | 주식회사 디에스글로벌이엔씨 | Method of constructing arch-type ribbon bridge and bridge using same |
| CN102777043A (en) * | 2012-08-03 | 2012-11-14 | 浙江精工钢结构有限公司 | Construction method for lifting arch structure in zero-deformation state |
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