CN114411558A - Construction method of assembled railway foundation - Google Patents
Construction method of assembled railway foundation Download PDFInfo
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- CN114411558A CN114411558A CN202210044204.XA CN202210044204A CN114411558A CN 114411558 A CN114411558 A CN 114411558A CN 202210044204 A CN202210044204 A CN 202210044204A CN 114411558 A CN114411558 A CN 114411558A
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- pier stud
- prefabricated pier
- prefabricated
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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Abstract
The application relates to an assembly type railway foundation construction method, which comprises the following steps: finishing the manufacturing of the prefabricated pier stud, and penetrating the steel strand into the prefabricated pier stud; arranging the prefabricated pier stud at a bearing platform installation position, and then lowering the steel strand into a bearing platform pore channel; installing an adjusting and positioning device on the bearing platform; adjusting the prefabricated pier stud to a designed position by using an adjusting and positioning device, and then fixing; hoisting a prefabricated capping beam at the top of the prefabricated pier stud; pouring a bearing platform pore channel, connecting the steel strand with the prefabricated capping beam after the pouring strength meets the design requirement, and tensioning the prestress; and pressing concrete into the prefabricated pier stud to complete the connection of the prefabricated pier stud and the bearing platform. Need not carry out the operation of ligature reinforcing bar, installation template, avoid sand blown by the wind to arouse pier stud structural change and shaping quality, and pier stud most prefabricate into, can effectively improve the speed of construction, used device structure cost is low in addition, avoids carrying out the organization work of manpower equipment such as template and transportation in bridge position department.
Description
Technical Field
The application relates to the field of prefabricating, assembling, erecting, installing and constructing of railway bridges, in particular to an assembly type railway foundation construction method.
Background
With the continuous deepening of road construction and development, bridge construction meets various challenges of mountains, canyons, deep sea, deserts and the like in natural environment. In addition, the desert area has severe natural environment, and the desert bridge construction is greatly influenced by drought, summer heat, cold and wind and sand activities. The construction operation time is short, the mechanical equipment is difficult to keep normal operation, and the construction organization difficulty is large. The construction of the bridge in the desert area not only needs to reduce the influence of the environment on the construction progress rapidly, but also ensures the construction quality and safety.
In some related technologies, the conventional bridge substructure construction scheme generally adopts a method of binding steel bars, installing templates and pouring concrete to construct a bridge substructure, and the main construction technology is mature. However, the method has the following disadvantages under the harsh natural environment:
firstly, the structure construction is easily affected by wind and sand, and a temporary wind-proof structure needs to be cleaned or arranged in time; secondly, each part of construction is completed by a plurality of working procedures, which takes a long time, for example, the next working procedure is carried out after concreting needs to be waited for concreting; and under the condition of long line, the organization of equipment and personnel is difficult; summer heat and severe cold can reduce the construction time, and the construction is difficult in the environment.
Disclosure of Invention
The embodiment of the application provides an assembly type railway foundation construction method, and aims to solve the problem that construction quality and construction progress cannot be guaranteed due to the fact that a bridge is constructed by a conventional construction method under severe environment conditions in the related art.
In a first aspect, a method for constructing an assembled railway foundation is provided, which comprises the following steps:
finishing the manufacturing of the prefabricated pier stud, and penetrating a steel strand into the prefabricated pier stud;
arranging the prefabricated pier stud at a bearing platform installation position, and then lowering the steel strand into a bearing platform pore channel;
installing an adjusting and positioning device on the bearing platform; adjusting the prefabricated pier stud to a designed position by using an adjusting and positioning device, and then fixing;
hoisting a prefabricated capping beam at the top of the prefabricated pier stud;
pouring a bearing platform pore channel, connecting the steel strand with the prefabricated capping beam after the pouring strength meets the design requirement, and tensioning the prestress;
and pressing concrete into the prefabricated pier stud to complete the connection of the prefabricated pier stud and the bearing platform.
In some embodiments, the step of arranging the prefabricated pier stud at a bearing platform installation position specifically comprises the following steps:
installing a pier column turnover assembly at a preset position, horizontally arranging a prefabricated pier column with a steel strand penetrating through the prefabricated pier column turnover assembly, and hinging the prefabricated pier column turnover assembly on the pier column turnover assembly;
and turning the prefabricated pier stud to a vertical state by using a lifting appliance and the pier stud turning-over assembly, and then lifting the prefabricated pier stud to a bearing platform installation position.
In some embodiments, the pier turnover assembly comprises:
the turnover frame body is hinged with a connecting part on one side, and the connecting part is used for being connected with one end of the prefabricated pier stud;
the vertical height of the supporting pad is equal to that of the turnover frame body, and the supporting pad is used for supporting the other end of the prefabricated pier stud;
and the cushion seat is arranged on the upper surfaces of the turnover frame body and the support cushion.
In some embodiments, the adjusting positioning device comprises:
one end of the vertical adjusting assembly is connected to the bearing platform, and the other end of the vertical adjusting assembly is connected to the prefabricated pier stud; the vertical adjusting component can be extended and retracted vertically;
the horizontal positioning device is provided with a first connecting part and a second connecting part which are vertically arranged, and the first connecting part and the second connecting part are respectively connected with the prefabricated pier stud and the bearing platform; the horizontal positioning device and the vertical adjusting assembly are distributed in a circular ring shape by taking the central shaft of the prefabricated pier column as a circle center.
In some embodiments, the vertical adjustment assembly comprises a counterforce seat connected to the prefabricated pier stud, and a jack mounted on the bearing platform; the jack is vertically arranged and supports the counter-force seat.
In some embodiments, hoisting the prefabricated capping beam connected with the steel strand at the top of the prefabricated pier stud specifically comprises the following steps:
gluing the joint surface of the prefabricated capping beam and/or the joint surface of the prefabricated pier stud;
and hoisting the prefabricated capping beam to the position above the prefabricated pier stud by using a lifting appliance, then placing the prefabricated capping beam downwards, and adjusting the prefabricated capping beam in the lowering process so as to align the prefabricated pier stud.
In some embodiments, the prefabricated pier stud is adjusted to a designed position by using an adjusting and positioning device and then fixed; before hoisting the prefabricated capping beam on the top of the prefabricated pier stud, the method further comprises the following steps:
arranging a steel strand limiting frame on the bearing platform to vertically limit the steel strand; the steel strand limiting frame comprises a plurality of stacked detachable units;
after the other prefabricated pier stud is hung above the steel strand by using the lifting appliance, gradually lowering the prefabricated pier stud, and simultaneously gradually disassembling the steel strand limiting frame from top to bottom until the other prefabricated pier stud is aligned and spliced with the prefabricated pier stud fixed by the adjusting and positioning device;
and a butt joint fixing device is arranged at the joint of the two prefabricated pier studs.
In some embodiments, the docking fixture comprises:
each group of connecting rods comprises two connecting rods, and the two connecting rods horizontally penetrate through the two prefabricated pier studs respectively;
and the connecting plates are vertically arranged and connect the two connecting rods in each group.
In some embodiments, after another prefabricated pier stud is hung above the steel strand by using the hanger, the joint surface of the two prefabricated pier studs needs to be ground flat, and glue is applied to the ground flat.
In some embodiments, the prefabricated pier stud is in a hollow cylinder shape, and a steel strand pore channel arranged along the length direction of the prefabricated pier stud is arranged on the inner wall of the prefabricated pier stud; and the upper end and the lower end of the prefabricated pier stud are respectively provided with a connecting hole for connecting the lifting appliance and the connecting rod.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides an assembly type railway foundation construction method, as the prefabricated pier stud is prefabricated and molded in a factory and a steel strand is penetrated; arranging the prefabricated pier stud at a bearing platform installation position, and then lowering the steel strand into a bearing platform pore channel; after the prefabricated pier stud is adjusted in place by using the adjusting and positioning device, pouring a bearing platform pore channel so as to connect the steel strand with a bearing platform; hoisting a prefabricated capping beam at the top of the prefabricated pier stud, connecting the steel strand with the prefabricated capping beam after the pouring strength meets the design requirement, and tensioning the prestress; finally, pressing concrete into the prefabricated pier stud to complete the connection between the prefabricated pier stud and the bearing platform; through above step, need not carry out the operation of ligature reinforcing bar, installation template, avoid sand blown by the wind to arouse pier stud structural change and shaping quality, and the pier stud is most prefabricated in the mill to when using, only need hoist and mount and a small amount of filling concrete, the construction method among the correlation technique of comparing can effectively improve the construction speed, reduces the influence of severe natural environment such as sand blown by the wind, severe cold, guarantees the outward appearance and the quality of structure. In addition, the device used by the method has low construction cost and quick positioning, can be adjusted according to the size of the pier stud, can meet the requirement of repeated utilization of installation of pier studs with different sizes and heights, and saves the construction cost. The pouring of construction materials such as templates and the organization work of manpower equipment are not needed to be carried out at the bridge position.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a single-section prefabricated pier and pier-turning assembly in a horizontal laid-down state according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single-section prefabricated pier stud and a pier stud turning assembly in a turning state according to an embodiment of the present application;
fig. 3 is a schematic view of a single-section prefabricated pier stud and vertical adjustment assembly in a vertical state according to an embodiment of the present application;
fig. 4 is a schematic view of a single prefabricated pier column and an adjusting and positioning device in a vertical state according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of an adjusting positioning device provided in an embodiment of the present application;
FIG. 6 is a schematic view of connection between a prefabricated capping beam and a single-section prefabricated pier stud provided by the embodiment of the application;
fig. 7 is a schematic view of a single prefabricated pier column for complete erection according to an embodiment of the present application;
fig. 8 is a schematic view of a double-section prefabricated pier and pier-turning assembly in a horizontal laid-down state according to an embodiment of the present disclosure;
fig. 9 is a schematic view of a double-section prefabricated pier stud and pier stud turning assembly in a turning state according to an embodiment of the present application;
fig. 10 is a schematic view of a vertical double-section prefabricated pier stud and an adjusting and positioning device according to an embodiment of the present application;
fig. 11 is a schematic view of a single-section prefabricated pier stud, an adjusting and positioning device and a steel strand limiting frame provided in the embodiment of the present application;
fig. 12 is a schematic view of a double-section prefabricated pier stud, an adjusting and positioning device and a steel strand limiting frame provided in the embodiment of the present application;
fig. 13 is a schematic view of a double-section prefabricated pier stud, a butt-joint fixing device, an adjusting and positioning device and a steel strand limiting frame provided in the embodiment of the present application;
FIG. 14 is a schematic structural diagram of a docking fixture according to an embodiment of the present disclosure;
fig. 15 is a schematic view of a prefabricated capping beam, a double-section prefabricated pier stud, a butt joint fixing device, an adjusting and positioning device and a steel strand limiting frame provided in the embodiment of the present application;
fig. 16 is a schematic view of the prefabricated capping beam, the two-section prefabricated pier stud and the bearing platform provided by the embodiment of the application after connection is completed.
In the figure: 1. a pier turning assembly; 100. a turning-over frame body; 101. a connecting portion; 102. a support pad; 103. a pad seat; 2. prefabricating a pier stud; 3. steel strand wires; 4. a spreader; 5. adjusting the positioning device; 500. a vertical adjustment assembly; 501. a horizontal positioning device; 6. prefabricating a cover beam; 7. a steel strand limiting frame; 8. a butt joint fixing device; 800. a connecting rod; 801. a connecting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides an assembly type railway foundation construction method, and aims to solve the problem that construction quality and construction progress cannot be guaranteed due to the fact that a bridge is constructed by a conventional construction method under severe environment conditions in the related art.
Referring to fig. 1 to 7, a method for constructing an assembled railway foundation includes the following steps:
the prefabricated pier stud 2 is manufactured in a factory, and the steel strand 3 penetrates through the prefabricated pier stud 2;
vertically arranging the prefabricated pier stud 2 at a bearing platform installation position, and then lowering the steel strand 3 into a bearing platform pore channel;
installing an adjusting and positioning device 5 on the bearing platform; the prefabricated pier stud 2 is adjusted to a designed position by using an adjusting and positioning device 5 and then fixed;
hoisting a prefabricated capping beam 6 on the top of the prefabricated pier stud 2;
pouring a bearing platform pore channel, connecting the steel strand 3 with the prefabricated capping beam 6 after the pouring strength meets the design requirement, and tensioning the prestress; the hoisting of the precast bent cap 6 and the pouring of the bearing platform pore passage are not performed in the existing sequence;
and (3) pressing concrete into the prefabricated pier stud 2, namely grouting the hole channel to complete the connection of the prefabricated pier stud 2 and the bearing platform, and finally removing the adjusting and positioning device 5.
Through the steps, the construction speed is effectively improved, the influence of severe natural environments such as sand wind, severe cold and the like is reduced, and the appearance and the quality of the structure are ensured; the method does not need organization work of manpower equipment such as transportation of construction materials such as templates and the like at the bridge position, is quick and simple to install, and has great advantages in the aspects of manufacturing cost, safety, construction period and quality compared with other schemes under the condition of severe environment regulation; the method specifically comprises the following steps:
need not carry out the operation of ligature reinforcing bar, installation template, avoid sand blown by the wind to arouse pier stud structural change and shaping quality, and the pier stud is most prefabricated at the mill to when using, only need hoist and mount and a small amount of filling concrete, the construction method among the correlation technique of comparison can effectively improve construction speed, reduces the influence of severe natural environment such as sand blown by the wind, severe cold, guarantees the outward appearance and the quality of structure. In addition, the device used by the method has low construction cost and quick positioning, can be adjusted according to the size of the pier stud, can meet the requirement of repeated utilization of installation of pier studs with different sizes and heights, and saves the construction cost. The organization work of manpower equipment such as the transportation of construction materials such as templates and the like at the bridge position is not needed.
Referring to fig. 1-2, in some preferred embodiments, the step of placing the prefabricated pier stud 2 in the platform installation position includes the following steps:
installing a pier column turnover component 1 at a preset position, horizontally arranging a prefabricated pier column 2 with a steel strand 3 in a penetrating way, and hinging the prefabricated pier column 2 on the pier column turnover component 1;
and the prefabricated pier stud 2 is turned to be in a vertical state by using the lifting appliance 4 and the pier stud turning-over assembly 1 and then lifted to a bearing platform installation position.
Wherein the concrete structure of pier stud turnover component 1 who uses has corresponding special setting, specifically is:
the pier stud overturning assembly 1 comprises an overturning frame body 100, a connecting part 101, a support pad 102 and a pad seat 103, wherein the connecting part 101 is hinged to one side of the overturning frame body 100, and the connecting part 101 is used for being connected with one end of a prefabricated pier stud 2; the vertical height of the support pad 102 is equal to that of the turnover frame body 100, and the support pad is used for supporting the other end of the prefabricated pier stud 2; the pad seat 103 is provided on the upper surfaces of the turn-over frame body 100 and the support pad 102.
The position of the support pad 102 can be adjusted according to the size of the prefabricated pier stud 2 when in use. After the prefabricated pier stud 2 is transported to a bridge position, the prefabricated pier stud is horizontally hung on the turnover frame body 100 by a crane, and the steel strand 3 is tightly bound and temporarily anchored; then the crane overturns the prefabricated pier stud 2, so that the prefabricated pier stud 2 rotates by taking the turnover frame body 100 as a point, and finally is vertically arranged on the turnover frame body 100 for hoisting.
Referring to fig. 3-5, in some preferred embodiments, in order to ensure the precise installation position of the prefabricated pier stud 2 on the bearing platform, it is necessary to be able to adjust in the vertical and in the plane, and to fix after adjustment, so the adjustment positioning device 5 has the following corresponding settings:
the adjusting and positioning device 5 comprises a vertical adjusting assembly 500 and a horizontal positioning device 501, one end of the vertical adjusting assembly 500 is connected to the bearing platform, and the other end of the vertical adjusting assembly 500 is connected to the prefabricated pier stud 2; the vertical adjustment assembly 500 is vertically retractable; the horizontal positioning device 501 is provided with a first connecting part and a second connecting part which are arranged vertically, and the first connecting part and the second connecting part are respectively connected with the prefabricated pier stud 2 and the bearing platform; the horizontal positioning device 501 and the vertical adjusting assembly 500 are distributed in a circular ring shape with the central axis of the prefabricated pier column 2 as the center.
When using, firstly adjust prefabricated pier stud 2 position on the horizontal plane, then utilize vertical adjusting part 500 to adjust vertical position, after position adjustment is accurate, utilize horizontal positioning device 501 to fix prefabricated pier stud 2 to the steadiness, the accuracy of cushion cap pore are pour in the later stage has been guaranteed.
Further, the vertical adjusting assembly 500 comprises a counterforce seat connected to the prefabricated pier stud 2, and a jack installed on the bearing platform; the jack is vertically arranged and supports the counter-force seat.
The adjusting and positioning device 5 is simple in structure, convenient to install and detach and capable of being repeatedly used.
In some preferred embodiments, the hoisting of the prefabricated capping beam 6 connected with the steel strand 3 on the top of the prefabricated pier stud 2 specifically comprises the following steps:
gluing the joint surface of the prefabricated capping beam 6 and/or the joint surface of the prefabricated pier stud 2;
the prefabricated capping beam 6 is hung above the prefabricated pier stud 2 by using the lifting appliance 4, then the prefabricated capping beam 6 is placed below, the prefabricated capping beam 6 is adjusted in the lowering process so as to be aligned with the prefabricated pier stud 2, and the hook is loosened after the prefabricated capping beam 6 is in place. Then, in the later stage, the bearing platform pore canal is poured, and the tensioning prestress can be carried out only after the pouring strength meets the design requirement and the two conditions of gluing and solidification are met.
It should be understood that fig. 1-7 described above are views illustrating the manner in which the prefabricated pier stud 2 is erected from a single section.
Referring to fig. 8-16, in some preferred embodiments, a method of installing prefabricated pier stud 2 is provided, using the above-described apparatus and structure, and with additional equipment, with some changes in the main steps, as follows:
vertically arranging the prefabricated pier stud 2 at a bearing platform installation position, and then lowering the steel strand 3 into a bearing platform pore channel;
installing an adjusting and positioning device 5 on the bearing platform; the prefabricated pier stud 2 is adjusted to a designed position by using an adjusting and positioning device 5 and then fixed;
arranging a steel strand limiting frame 7 on the bearing platform to vertically limit the steel strand 3; the steel strand limiting frame 7 comprises a plurality of stacked detachable units;
after another prefabricated pier stud 2 is lifted to the position above the steel strand 3 from the pier stud turnover assembly 1 by using the lifting appliance 4, gradually lowering the prefabricated pier stud 2, and simultaneously gradually disassembling the steel strand limiting frame 7 from top to bottom until the alignment and splicing of the other prefabricated pier stud 2 and the prefabricated pier stud 2 fixed by the adjusting and positioning device 5 are completed;
a butt joint fixing device 8 is arranged at the joint of the two prefabricated pier studs 2;
hoisting a prefabricated capping beam 6 on the top of the prefabricated pier stud 2;
pouring a bearing platform pore channel, connecting the steel strand 3 with the prefabricated capping beam 6 after the pouring strength meets the design requirement, and tensioning the prestress; the hoisting of the precast bent cap 6 and the pouring of the bearing platform pore passage are not performed in the existing sequence;
and (3) pressing concrete, namely grouting a pore channel into the prefabricated pier stud 2 to complete the connection of the prefabricated pier stud 2 and the bearing platform, and dismantling the pier stud turnover assembly 1, the butt joint fixing device 8 and the adjusting and positioning device 5 after the two prefabricated pier studs 2 are completely solidified.
The installation of two prefabricated pier stud 2 through above step is also comparatively quick, makes its influence that reduces adverse circumstances and produce.
Referring to fig. 13 and 14, the docking fixture 8 includes the following structure:
the connecting rods 800 and the connecting plates 801 are arranged in a plurality of groups, each group of connecting rods 800 comprises two connecting rods 800, and two prefabricated pier studs 2 are horizontally arranged in a penetrating mode respectively; the connecting plates 801 are vertically arranged and vertically connect the two connecting rods 800 in each group.
Further, after another prefabricated pier stud 2 is lifted to the position above the steel strand 3 from the pier stud turnover assembly 1 by using the lifting appliance 4, the joint surface of the two prefabricated pier studs 2 needs to be ground flat, and glue is applied to the ground flat surface to strengthen connection.
The steel strand limiting frame 7 comprises a vertical frame body and a right-angle tripod, and the right-angle tripod is connected with the steel strands 3.
Also there is specific setting to the structure with prefabricated pier stud 2 of device more than the cooperation, specifically is:
the prefabricated pier stud 2 is in a hollow cylinder shape, and a steel strand pore channel arranged along the length direction of the prefabricated pier stud is arranged on the inner wall of the prefabricated pier stud; the upper end and the lower end of the prefabricated pier stud 2 are respectively provided with a connecting hole for connecting the lifting appliance 4 with the connecting rod 800; the arrangement of the connecting holes is convenient for the hoisting connection of the lifting appliance 4 and the connection of the butt joint fixing device 8, thereby playing a role in different working procedures; the hollow structure in 2 inside prefabricated pier stud to avoid the installation template shaping, accelerate the step of construction.
The rapid installation and construction method of the prefabricated substructure can reduce the consumption of temporary building materials in the construction process, reduce the requirements of manpower and material resources, is simple and rapid to install, ensures the quality of the structure, and has great significance on the installation technology of bridges.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A construction method of an assembled railway foundation is characterized by comprising the following steps:
finishing the manufacturing of the prefabricated pier stud (2), and penetrating a steel strand (3) into the prefabricated pier stud (2);
arranging the prefabricated pier stud (2) at a bearing platform installation position, and then lowering the steel strand (3) into a bearing platform pore channel;
an adjusting and positioning device (5) is arranged on the bearing platform; adjusting the prefabricated pier stud (2) to a designed position by using an adjusting and positioning device (5), and then fixing;
hoisting a prefabricated capping beam (6) at the top of the prefabricated pier stud (2);
pouring a bearing platform pore passage, connecting the steel strand (3) with the prefabricated capping beam (6) after the pouring strength meets the design requirement, and tensioning the prestress;
and pressing concrete into the prefabricated pier stud (2) to complete the connection of the prefabricated pier stud (2) and the bearing platform.
2. The assembly type railway foundation construction method according to claim 1, wherein the step of arranging the precast pier stud (2) at a bearing platform installation position comprises the following steps:
installing a pier column turnover component (1) at a preset position, horizontally arranging a prefabricated pier column (2) with a steel strand (3) in a penetrating way, and hinging the prefabricated pier column turnover component (1) with the prefabricated pier column (2);
and (3) turning the prefabricated pier stud (2) to a vertical state by using a lifting appliance (4) and the pier stud turning-over assembly (1), and then lifting the prefabricated pier stud to a bearing platform installation position.
3. A fabricated railway foundation construction method as claimed in claim 2, wherein the pier turn assembly (1) comprises:
the turnover frame body (100) is hinged with a connecting part (101) on one side, and the connecting part (101) is used for being connected with one end of the prefabricated pier stud (2);
the vertical height of the supporting pad (102) is equal to that of the turnover frame body (100), and the supporting pad is used for supporting the other end of the prefabricated pier column (2);
and the pad seat (103) is arranged on the upper surfaces of the turnover frame body (100) and the supporting pad (102).
4. A fabricated railway foundation construction method as claimed in claim 1, wherein the adjusting and positioning means (5) comprises:
one end of the vertical adjusting assembly (500) is connected to the bearing platform, and the other end of the vertical adjusting assembly is connected to the prefabricated pier stud (2); the vertical adjusting assembly (500) is telescopic in the vertical direction;
the horizontal positioning device (501) is provided with a first connecting part and a second connecting part which are perpendicular to each other, and the first connecting part and the second connecting part are respectively connected with the prefabricated pier stud (2) and the bearing platform; the horizontal positioning device (501) and the vertical adjusting assembly (500) are distributed in a circular ring shape by taking the central shaft of the prefabricated pier column (2) as the center of a circle.
5. The fabricated railway foundation construction method of claim 4, wherein:
the vertical adjusting assembly (500) comprises a counterforce seat connected to the prefabricated pier column (2) and a jack installed on the bearing platform; the jack is vertically arranged and supports the counter-force seat.
6. The assembly type railway foundation construction method of claim 1, wherein a prefabricated capping beam (6) connected with the steel strand (3) is hoisted on the top of the prefabricated pier stud (2), and the method comprises the following steps:
gluing the joint surface of the prefabricated capping beam (6) and/or the joint surface of the prefabricated pier stud (2);
and hoisting the prefabricated capping beam (6) to the upper part of the prefabricated pier stud (2) by using the lifting appliance (4), then placing the prefabricated capping beam (6) downwards, and adjusting the prefabricated capping beam (6) in the lowering process so as to align the prefabricated pier stud (2).
7. The fabricated railway foundation construction method according to claim 1, wherein the prefabricated pier stud (2) is adjusted to a design position by using an adjusting and positioning device (5) and then fixed; before hoisting the prefabricated capping beam (6) on the top of the prefabricated pier stud (2), the method further comprises the following steps:
arranging a steel strand limiting frame (7) on the bearing platform to vertically limit the steel strand (3); the steel strand limiting frame (7) comprises a plurality of stacked detachable units;
hoisting the other prefabricated pier stud (2) to the position above the steel strand (3) by using the hoisting tool (4), gradually lowering the prefabricated pier stud (2), and simultaneously gradually disassembling the steel strand limiting frame (7) from top to bottom until the other prefabricated pier stud (2) is aligned and spliced with the prefabricated pier stud (2) fixed by the adjusting and positioning device (5);
and a butt joint fixing device (8) is arranged at the joint of the two prefabricated pier studs (2).
8. A fabricated railway foundation construction method as claimed in claim 7, wherein the butt fixing device (8) comprises:
the connecting rods (800) are arranged in a plurality of groups, each group comprises two connecting rods (800), and two prefabricated pier studs (2) are horizontally arranged in a penetrating manner respectively;
and the connecting plates (801) are vertically arranged and connect the two connecting rods (800) in each group.
9. The fabricated railway foundation construction method of claim 7, wherein:
after the other prefabricated pier stud (2) is hung above the steel strand (3) by using the hanger (4), the joint surface of the two prefabricated pier studs (2) is ground flat, and glue is applied to the ground plane.
10. The fabricated railway foundation construction method of claim 8, wherein:
the prefabricated pier stud (2) is in a hollow cylinder shape, and a steel strand pore channel arranged along the length direction of the prefabricated pier stud is arranged on the inner wall of the prefabricated pier stud; and the upper end and the lower end of the prefabricated pier stud (2) are respectively provided with a connecting hole for connecting the lifting appliance (4) and the connecting rod (800).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044204.XA CN114411558A (en) | 2022-01-14 | 2022-01-14 | Construction method of assembled railway foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210044204.XA CN114411558A (en) | 2022-01-14 | 2022-01-14 | Construction method of assembled railway foundation |
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|---|---|---|---|---|
| WO2020001156A1 (en) * | 2018-06-29 | 2020-01-02 | 比亚迪股份有限公司 | Bridge and bridge pier thereof |
| CN111705664A (en) * | 2020-06-08 | 2020-09-25 | 中铁北京工程局集团第一工程有限公司 | Hoisting process of prefabricated pier stud of assembled bridge |
| CN111996906A (en) * | 2020-09-21 | 2020-11-27 | 山东鲁桥建设有限公司 | Efficient construction method of assembled pier |
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2022
- 2022-01-14 CN CN202210044204.XA patent/CN114411558A/en active Pending
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| WO2020001156A1 (en) * | 2018-06-29 | 2020-01-02 | 比亚迪股份有限公司 | Bridge and bridge pier thereof |
| CN111705664A (en) * | 2020-06-08 | 2020-09-25 | 中铁北京工程局集团第一工程有限公司 | Hoisting process of prefabricated pier stud of assembled bridge |
| CN111996906A (en) * | 2020-09-21 | 2020-11-27 | 山东鲁桥建设有限公司 | Efficient construction method of assembled pier |
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| 张一诺: "预制装配式铁路桥墩施工技术探讨", 《山西建筑》 * |
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