CN114960434A - Prefabricated and solidified pier beam construction method and pier beam structure - Google Patents
Prefabricated and solidified pier beam construction method and pier beam structure Download PDFInfo
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- CN114960434A CN114960434A CN202210550824.0A CN202210550824A CN114960434A CN 114960434 A CN114960434 A CN 114960434A CN 202210550824 A CN202210550824 A CN 202210550824A CN 114960434 A CN114960434 A CN 114960434A
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 95
- 239000010959 steel Substances 0.000 claims abstract description 95
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 238000005253 cladding Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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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
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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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Abstract
The application relates to a pier beam construction method and a pier beam structure for prefabricating and then solidifying, and relates to the technical field of bridge construction. The pier beam construction method includes the steps of firstly arranging a prefabricated pier on a pile foundation bearing platform, symmetrically arranging two prefabricated beams at the top of the prefabricated pier, adjusting the positions of the two prefabricated beams to enable at least part of the two prefabricated beams to be placed at the top of the prefabricated pier, reserving a reserved gap not smaller than a preset length between the two prefabricated beams, respectively connecting the prefabricated beams placed above the top of the prefabricated pier with the prefabricated pier, connecting first reserved steel bars at the adjacent ends of the two prefabricated beams in the reserved gap, connecting second reserved steel bars at the top of the prefabricated pier in the reserved gap, and finally pouring the reserved gap to form a post-pouring section. The pier beam construction method can form an integral structure with a stable structure, the requirement of the foundation construction scale is reduced on the premise that the foundation rigidity and the displacement limit value are met, and the investment of the foundation scale is reduced.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a pier beam construction method and a pier beam structure for prefabricating and then solidifying.
Background
At present, the sea-crossing railway bridge has the characteristics of long length, large scale, more holes and larger proportion of a non-navigable hole area approach bridge in a full bridge, and in the whole construction stage, due to the particularity of the environment, the construction condition is quite severe, the weather hydrology is variable, and the effective operation time is very short.
In order to reduce the workload of site construction operation of bridge sites as much as possible, in the related technology, a construction method of simply supported beams and prefabricated bridge piers for floating crane erection is often adopted, a sea-crossing railway bridge is influenced by high navigation clearance requirements of main navigation holes, bridge piers of approach bridges in non-navigation hole areas are also high, the design of simply supported beam fixed piers is greatly influenced by foundation rigidity and displacement limit values, so that the foundation scale is huge, and the problems of inconsistent pier beam structure size, poor landscape performance and high manufacturing cost exist.
Disclosure of Invention
The embodiment of the application provides a pier beam construction method for solidification after prefabrication and a pier beam structure, and aims to solve the problems of large foundation scale, poor landscape and high manufacturing cost of the pier beam structure in the related technology.
In a first aspect, a precast and then consolidated pier beam construction method is provided, which includes:
arranging a prefabricated bridge pier on a pile foundation bearing platform, and symmetrically arranging two prefabricated beams at the top of the prefabricated bridge pier;
adjusting the positions of the two precast beams to enable the two precast beams to be at least partially placed at the top of the precast pier, and reserving a reserved gap with the length not less than the preset length between the two precast beams;
respectively connecting the precast beams placed above the tops of the precast bridge piers with the precast bridge piers, connecting first preformed steel bars at the adjacent ends of the two precast beams in the reserved gaps, and connecting second preformed steel bars at the tops of the precast bridge piers in the reserved gaps;
and pouring the reserved gap to form a post-pouring section.
In some embodiments, the method for installing the precast pier on the pile foundation cap and symmetrically installing two precast beams on the top of the precast pier comprises the following steps:
arranging a prefabricated bridge pier on a pile foundation bearing platform;
arranging a plurality of supporting steel plates arranged at intervals on the top of the prefabricated bridge pier;
and symmetrically arranging two precast beams at the top of the precast bridge pier, and enabling the parts of the two precast beams positioned at the top of the precast bridge pier to be placed on the supporting steel plate.
In some embodiments, the step of respectively connecting the precast girders above the tops of the precast piers to the precast piers comprises:
a plurality of connecting steel bundles which are arranged at intervals are arranged on the precast beam in a penetrating way;
fixing one end of the connecting steel bundle with the precast beam, and at least partially penetrating the other end of the connecting steel bundle into the precast pier below the connecting steel bundle and fixing the other end of the connecting steel bundle with the precast pier;
and vertically tensioning the connecting steel bundle until the stress of the connecting steel bundle is more than or equal to a first preset stress.
In some embodiments, after the pouring of the reserved gap is completed, detecting the elastic modulus of the post-pouring section, and judging whether the elastic modulus of the post-pouring section is greater than a preset modulus, if so, penetrating a plurality of connecting steel bundles arranged at intervals at two ends, close to a precast beam, of the post-pouring section, fixing one end of each connecting steel bundle with the post-pouring section, and penetrating the other end of each connecting steel bundle into the precast pier located below and fixing the other end of each connecting steel bundle with the precast pier;
and vertically tensioning the connecting steel bundle until the stress of the connecting steel bundle is more than or equal to a second preset stress.
In some embodiments, a gap between the support steel plates is filled with grouting.
In a second aspect, there is provided a precast post-consolidated pier beam structure comprising:
prefabricating a bridge pier;
the prefabricated bridge comprises two prefabricated beams arranged above the prefabricated bridge pier, wherein at least part of each prefabricated beam is placed at the top of the prefabricated bridge pier and is connected with the prefabricated bridge pier, and a reserved gap with the length not less than the preset length is reserved between the two prefabricated beams; wherein the content of the first and second substances,
two the adjacent end of precast beam all is equipped with first reservation reinforcing bar, just first reservation reinforcing bar is in reservation clearance department links to each other, the top of precast pier is equipped with the second and reserves the reinforcing bar, still be equipped with the post-cast section on the reservation clearance, the post-cast section is used for the cladding first reservation reinforcing bar and second reservation reinforcing bar, in order to be used for connecting precast pier and two precast beam.
In some embodiments, the precast beam comprises a main precast beam body including a top plate, a bottom plate, a first web plate and a flange plate, and two sub precast beam bodies including a second web plate;
the two auxiliary precast beam bodies are symmetrically arranged at the corresponding ends of the main precast beam body at intervals, each auxiliary precast beam body is placed at the top of the precast bridge pier and is connected with the precast bridge pier, and the first reserved steel bars are reserved at the end parts of each auxiliary precast beam body and the main precast beam body.
In some embodiments, a plurality of supporting steel plates arranged at intervals are arranged at the top of the precast pier corresponding to the secondary precast beam body and are used for supporting the secondary precast beam body.
In some embodiments, a plurality of connecting steel bundles arranged at intervals are arranged at the end parts of the secondary precast beam body and the post-cast section which is located on the same vertical surface with the secondary precast beam body in a penetrating manner, and one end, close to the precast pier, of each connecting steel bundle at least partially extends into the precast pier and is fixed with the precast pier.
In some embodiments, the space between the supporting steel plates is filled with grouting material.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a prefabricated post-consolidation pier beam construction method, because at least part of two prefabricated beams are arranged on the top of a prefabricated pier, a reserved gap which is not less than the preset length is reserved between the two prefabricated beams, the prefabricated beams arranged above the top of the prefabricated pier are respectively connected with the prefabricated pier, first reserved steel bars at the adjacent ends of the two prefabricated beams are connected in the reserved gap, second reserved steel bars at the top of the prefabricated pier are connected in the reserved gap, and finally the reserved gap is poured to form a post-pouring section, the pier beam construction method adopts factory prefabricated main beams and prefabricated piers, only the post-pouring section at the top of the prefabricated pier is poured on site, so that an integral structure with stable structure can be formed, the requirement of foundation construction is greatly reduced on the premise of meeting foundation rigidity and displacement limit values, the investment of foundation scale is greatly reduced, the size of the prefabricated bridge pier is reduced by the pier beam structure adopting the construction method, the scale of the pile foundation is reduced, and the problems of large foundation scale, poor landscape and high manufacturing cost of the pier beam structure in the related technology are solved.
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 side view of a precast post-consolidated pier beam structure provided in an embodiment of the present application;
fig. 2 is a schematic vertical cross-section at a-a in fig. 1 of the present application.
In the figure: 1-precast bridge pier, 2-precast beam, 20-main precast beam body, 21-auxiliary precast beam body, 3-supporting steel plate, 4-connecting steel bundle, 5-grouting material and 6-post-pouring section.
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 a pier beam construction method for solidification after prefabrication, which can solve the problems of large foundation scale, poor landscape and high manufacturing cost of a pier beam structure in the related technology.
Referring to fig. 1 and 2, the method for constructing the pier beam mainly comprises the steps of firstly arranging a prefabricated pier 1 on a pile foundation bearing platform, and symmetrically arranging two prefabricated beams 2 at the top of the prefabricated pier 1; then adjusting the positions of the two precast beams 2 to enable the two precast beams 2 to be at least partially placed at the top of the precast pier 1, and reserving a reserved gap with the length not less than the preset length between the two precast beams 2; then respectively connecting the precast beams 2 placed above the tops of the precast piers 1 with the precast piers 1, connecting first reserved steel bars at the adjacent ends of the two precast beams 2 in a reserved gap, and connecting second reserved steel bars at the tops of the precast piers 1 in the reserved gap; and finally pouring the reserved gap to form a post-pouring section 6.
The pier beam construction method is characterized in that at least part of two precast beams 2 are placed on the top of a precast pier 1, a reserved gap with the length not less than the preset length is reserved between the two precast beams 2, then the precast beams 2 placed above the top of the precast pier 1 are respectively connected with the precast pier 1, first reserved steel bars at the adjacent ends of the two precast beams 2 are connected in the reserved gap, second reserved steel bars at the top of the precast pier 1 are connected, and finally the reserved gap is poured to form a post-pouring section 6, so that the pier beam construction method adopts factory precast main beams and the precast piers 1, only the post-pouring section 6 at the top of the precast pier 1 needs to be poured on site, a stable integral structure can be formed, the requirements of foundation construction scale are greatly reduced on the premise of meeting foundation rigidity and displacement limit values, and investment of foundation scale is greatly reduced, the pier beam structure adopting the construction method reduces the size of the prefabricated pier 1, reduces the scale of the pile foundation and solves the problems of large scale, poor landscape and high cost of the pier beam structure foundation in the related technology.
Further, set up prefabricated pier 1 on the pile foundation cushion cap to set up two precast beams 2 at prefabricated pier 1's top symmetry, its step mainly includes:
arranging a prefabricated pier 1 on a pile foundation bearing platform;
arranging a plurality of supporting steel plates 3 arranged at intervals on the top of the prefabricated pier 1;
two precast girders 2 are symmetrically arranged at the top of the precast pier 1, and the parts of the two precast girders 2 at the top of the precast pier 1 are all placed on a supporting steel plate 3.
Further, the precast beam 2 that will be located 1 tops of precast pier top respectively links to each other with precast pier 1, and its step mainly includes:
a plurality of connecting steel bundles 4 which are arranged at intervals are arranged on the precast beam 2 in a penetrating way;
and fixing one end of the connecting steel bundle 4 with the precast beam 2, and at least partially penetrating the other end of the connecting steel bundle 4 into the precast pier 1 below and fixing the other end of the connecting steel bundle with the precast pier 1.
Specifically, the precast beam 2 comprises two parts, specifically a main precast beam body 20 and an auxiliary precast beam body 21, when prefabricating, the main precast beam body 20 is firstly manufactured, and then the auxiliary precast beam body 21 is arranged at the corresponding end of the main precast beam body 20, wherein the main precast beam body 20 is of a box-shaped structure containing a top plate, a bottom plate, a web plate and a flange plate, the auxiliary precast beam body 21 is of a rectangular structure containing only the web plate, the two are combined to form a single precast beam, and the precast bridge pier 1 is a hollow thin-wall pier with a solid section at the top. The prefabricated beam 2 is hoisted to the pier top of the prefabricated pier 1 by utilizing the floating crane, the positions of the prefabricated beams 2 on the two sides are accurately adjusted, so that the auxiliary prefabricated beam body 21 is placed at the top of the prefabricated pier 1, wherein the size of the auxiliary prefabricated beam body 21 in the length direction of the prefabricated beam 2 is not less than 2m in order to ensure the structural stability of integral connection.
Specifically, a plurality of supporting steel plates 3 are respectively arranged at the web plate position of the auxiliary precast beam body 21 according to needs, the auxiliary precast beam body 21 is dropped on the precast pier 1, after local fine adjustment is performed in place, a pre-stressed pore channel reserved in the precast pier 1 corresponds to a pre-stressed pore channel reserved in the web plate of the auxiliary precast beam body 21, then a steel bundle 4 penetrates through the top of the web plate of the auxiliary precast beam body 21, and a single-end self-locking type pre-stressed steel strand is formed through a pre-stressed device pre-embedded in the precast pier 1. And gaps except for the supporting steel plate 3 between the web plate of the auxiliary precast beam body 21 and the precast pier 1 are densely filled with grouting material 5, and the precast pier 1, the auxiliary precast beam body 21, the supporting steel plate 3, the grouting material 5 and the prestress device form an integral consolidation structure at the top under the tension connection of the connecting steel bundle 4.
In addition, a first reserved steel bar is reserved at the end part of the main precast beam body 20 provided with the auxiliary precast beam body 21, after the auxiliary precast beam body 21 is connected with the precast pier 1 through the connecting steel bundle 4, the main precast beam body 20 and the first reserved steel bar reserved at the adjacent end part of the auxiliary precast beam body 21 which are oppositely arranged are connected, and a second reserved steel bar is also reserved at the top of the precast pier 1 to be connected, so that the second reserved steel bar at the top of the precast pier 1 is connected at the same time, after the connection is completed, concrete is poured at the position of a reserved gap corresponding to the connected reserved steel bar to form a post-pouring section 6, and the post-pouring section 6 is used for forming the precast beams 2 and the precast pier 1 which are positioned at two sides into a complete integral structure.
Further, after the pouring of the reserved gap is completed, the elastic modulus of the post-pouring section 6 is detected, whether the elastic modulus of the post-pouring section 6 is larger than a preset modulus is judged, if yes, the steel strand 4 is connected to the top of the end portion of the post-pouring section 6, which is located on the same vertical surface with the two auxiliary precast beam bodies 21 located on the same side, in a penetrating manner, a corresponding prestressed pore channel is reserved in advance when the post-pouring section 6 is poured in the front, the steel strand extends into the precast pier 1 after penetrating, the steel strand is connected with a pre-embedded prestress device in the precast pier 1 to form a single-end self-locking prestress steel strand, and the steel strand 4 is connected in a vertical manner until the stress of the steel strand 4 is larger than or equal to a second preset stress.
Further, chiseling treatment is carried out on concrete on the side face of a web plate of the auxiliary precast beam body 21, the end portion of the web plate is anchored with a first reserved steel bar reserved at the end portion of the auxiliary precast beam body 21 in a sleeve or lap joint mode, the top plate, the bottom plate and the flange plate at the end portion of the main precast beam body 20 are anchored and connected with steel bars inside the post-cast section 6 again in a sleeve or lap joint mode, connecting steel bundles 4 are pre-embedded in the transverse full width range of the precast pier 1, prestressed corrugated pipes are installed at the positions of the rest post-cast sections 6 except the position of the web plate of the auxiliary precast beam body 21, and positioning steel bars are installed to enable a tensioning prestressed pore channel on the positioning steel bars to correspond to a prestressed pore channel reserved at the top of the pier.
The application also provides a pier beam structure of prefabricated postconsolidation, it mainly includes prefabricated pier 1 and locates two precast girders 2 of prefabricated pier 1 top, wherein, each precast girder 2 all at least part is shelved in the top of prefabricated pier 1, and all link to each other with prefabricated pier 1, it has the reservation clearance that is not less than preset length to reserve between two precast girders 2, the adjacent end of two precast girders 2 all is equipped with first reserved reinforcing bar, and first reserved reinforcing bar links to each other in reservation clearance department, the top of prefabricated pier 1 is equipped with the second and reserves the reinforcing bar, it waters section 6 after still being equipped with on the reservation clearance, it is used for first reserved reinforcing bar of cladding and second to water section 6 after, in order to be used for connecting prefabricated pier 1 and two precast girders 2.
Further, precast beam 2 mainly includes main precast beam body 20 and two vice precast beam bodies 21, and main precast beam body 20 includes the roof, the bottom plate, first web and flange plate, and vice precast beam body 21 includes the second web, and the corresponding end of main precast beam body 20 is located to two vice precast beam bodies 21 interval symmetries, and each vice precast beam body 21 all rests in the top of prefabricated pier 1 to all link to each other with prefabricated pier 1, and the tip of each vice precast beam body 21 and main precast beam body 20 all reserves first reservation reinforcing bar.
Furthermore, a plurality of supporting steel plates 3 arranged at intervals are arranged at the top of the precast pier 1 in the area corresponding to the auxiliary precast beam body 21, and the supporting steel plates 3 are used for supporting the corresponding auxiliary precast beam body 21.
Furthermore, a plurality of connecting steel bundles 4 which are arranged at intervals are arranged at the end parts of the secondary precast beam body 21 and the post-cast section 6 which is positioned on the same vertical surface with the secondary precast beam body 21 in a penetrating mode, and one end, close to the precast pier 1, of each connecting steel bundle 4 at least partially extends into the precast pier 1 and is fixed with the precast pier 1. Specifically, a plurality of supporting steel plates 3 are respectively arranged at the web plate position of the auxiliary precast beam body 21 according to needs, the auxiliary precast beam body 21 is dropped on the precast pier 1, after local fine adjustment is performed in place, a pre-stressed pore channel reserved in the precast pier 1 corresponds to a pre-stressed pore channel reserved in the web plate of the auxiliary precast beam body 21, then a steel bundle 4 penetrates through the top of the web plate of the auxiliary precast beam body 21, and a single-end self-locking type pre-stressed steel strand is formed through a pre-stressed device pre-embedded in the precast pier 1. And gaps except for the supporting steel plate 3 between the web plate of the auxiliary precast beam body 21 and the precast pier 1 are densely filled with grouting material 5, and the precast pier 1, the auxiliary precast beam body 21, the supporting steel plate 3, the grouting material 5 and the prestress device form an integral consolidation structure at the top under the tension connection of all the connecting steel bundles 4.
The function implementation of each structure in the pier-beam structure corresponds to each step in the pier-beam construction method, and the rest structures and the implementation process are not repeated here.
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 the case may be.
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 a prefabricated and then consolidated pier beam is characterized by comprising the following steps:
arranging a prefabricated pier (1) on a pile foundation bearing platform, and symmetrically arranging two prefabricated beams (2) at the top of the prefabricated pier (1);
adjusting the positions of the two precast beams (2) to enable the two precast beams (2) to be at least partially placed at the top of the precast bridge pier (1), and reserving a reserved gap with the length not less than the preset length between the two precast beams (2);
respectively connecting the precast girders (2) placed above the tops of the precast piers (1) with the precast piers (1), connecting first reserved steel bars at the adjacent ends of the two precast girders (2) in the reserved gaps, and connecting second reserved steel bars at the tops of the precast piers (1) in the reserved gaps;
and pouring the reserved gap to form a post-pouring section (6).
2. The precast post-consolidated pier beam construction method according to claim 1, wherein a precast pier (1) is installed on a pile cap, and two precast beams (2) are symmetrically installed on the top of the precast pier (1), and the steps comprise:
arranging a prefabricated pier (1) on a pile foundation bearing platform;
arranging a plurality of supporting steel plates (3) arranged at intervals on the top of the prefabricated pier (1);
the two precast beams (2) are symmetrically arranged at the top of the precast pier (1), and the parts, located at the top of the precast pier (1), of the two precast beams (2) are all placed on the supporting steel plates (3).
3. A precast post-consolidated pier beam construction method according to claim 1, wherein the step of connecting the precast girders (2) located above the top of the precast pier (1) to the precast pier (1), respectively, comprises:
a plurality of connecting steel bundles (4) arranged at intervals are arranged on the precast beam (2) in a penetrating way;
fixing one end of the connecting steel bundle (4) with the precast beam (2), and at least partially penetrating the other end of the connecting steel bundle (4) into the precast pier (1) below and fixing the other end of the connecting steel bundle with the precast pier (1);
and vertically tensioning the connecting steel bundle (4) until the stress of the connecting steel bundle (4) is more than or equal to a first preset stress.
4. A method of constructing a precast post-consolidated pier beam according to claim 3, wherein:
after the pouring of the reserved gap is finished, detecting the elastic modulus of the post-pouring section (6), judging whether the elastic modulus of the post-pouring section (6) is larger than a preset modulus, if so, penetrating a plurality of connecting steel bundles (4) which are arranged at intervals at two ends, close to the precast beam (2), of the post-pouring section (6), fixing one end of each connecting steel bundle (4) with the post-pouring section (6), and penetrating at least part of the other end of each connecting steel bundle (4) into the precast pier (1) below and fixing the other end of each connecting steel bundle with the precast pier (1);
and vertically tensioning the connecting steel bundle (4) until the stress of the connecting steel bundle (4) is more than or equal to a second preset stress.
5. The construction method of the precast post-consolidated pier beam according to claim 2, wherein: and filling grouting materials (5) in gaps among the supporting steel plates (3).
6. A precast post-consolidated pier beam structure, comprising:
prefabricating a bridge pier (1);
the prefabricated bridge structure comprises two prefabricated beams (2) arranged above a prefabricated bridge pier (1), wherein at least part of each prefabricated beam (2) is placed at the top of the prefabricated bridge pier (1) and is connected with the prefabricated bridge pier (1), and a reserved gap not smaller than a preset length is reserved between the two prefabricated beams (2); wherein the content of the first and second substances,
two the adjacent end of precast beam (2) all is equipped with first reservation reinforcing bar, just first reservation reinforcing bar is in reserve clearance department links to each other, the top of precast pier (1) is equipped with the second and reserves reinforcing bar, still be equipped with post-cast section (6) on reserving the clearance, post-cast section (6) are used for the cladding first reservation reinforcing bar and second reserve reinforcing bar, in order to be used for connecting precast pier (1) and two precast beam (2).
7. A prefabricated post-consolidated pier beam structure according to claim 6, wherein:
the precast beam (2) comprises a main precast beam body (20) and two auxiliary precast beam bodies (21), wherein the main precast beam body (20) comprises a top plate, a bottom plate, a first web plate and a flange plate, and the auxiliary precast beam bodies (21) comprise a second web plate;
the two auxiliary precast beam bodies (21) are symmetrically arranged at the corresponding ends of the main precast beam body (20) at intervals, each auxiliary precast beam body (21) is placed at the top of the precast pier (1) and is connected with the precast pier (1), and the first reserved steel bars are reserved at the end parts of each auxiliary precast beam body (21) and the main precast beam body (20).
8. A precast post-consolidated pier beam structure according to claim 7, wherein: the top of the prefabricated bridge pier (1) and the area corresponding to the auxiliary prefabricated beam body (21) are provided with a plurality of supporting steel plates (3) arranged at intervals, and the supporting steel plates (3) are used for supporting the auxiliary prefabricated beam body (21).
9. A precast post-consolidated pier beam structure according to claim 7, wherein: vice precast beam body (21) with vice precast beam body (21) is in same vertical face the connection steel bundle (4) that many intervals set up are all worn to be equipped with by the tip of post-cast section (6), connection steel bundle (4) are close to the one end part at least of precast pier (1) stretches into precast pier (1), and with precast pier (1) is fixed.
10. A precast post-consolidated pier beam structure according to claim 8, wherein: and grouting materials (5) are filled between the supporting steel plates (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203795292U (en) * | 2014-03-27 | 2014-08-27 | 广州瀚阳工程咨询有限公司 | Bearing-free prestressed concrete continuous rigid frame bridge with double-wall piers |
| CN211922242U (en) * | 2019-10-18 | 2020-11-13 | 广州地铁设计研究院股份有限公司 | Full rigid frame bridge system for long and large intervals of rail transit |
| CN111996906A (en) * | 2020-09-21 | 2020-11-27 | 山东鲁桥建设有限公司 | Efficient construction method of assembled pier |
| CN112538814A (en) * | 2019-09-20 | 2021-03-23 | 黑龙江农垦建工路桥有限公司 | Construction process of transversely prefabricated and assembled corrugated steel web PC combined box girder for bridge construction |
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- 2022-05-18 CN CN202210550824.0A patent/CN114960434A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203795292U (en) * | 2014-03-27 | 2014-08-27 | 广州瀚阳工程咨询有限公司 | Bearing-free prestressed concrete continuous rigid frame bridge with double-wall piers |
| CN112538814A (en) * | 2019-09-20 | 2021-03-23 | 黑龙江农垦建工路桥有限公司 | Construction process of transversely prefabricated and assembled corrugated steel web PC combined box girder for bridge construction |
| CN211922242U (en) * | 2019-10-18 | 2020-11-13 | 广州地铁设计研究院股份有限公司 | Full rigid frame bridge system for long and large intervals of rail transit |
| 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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Inventor after: Liu Jinjin Inventor after: Pan Tao Inventor after: Yao Renxing Inventor after: Yu Junjie Inventor after: Liu Houjun Inventor after: Zheng Qinggang Inventor after: Xiao Haizhu Inventor after: Mei Xinyong Inventor after: Wang Heng Inventor after: Duan Xuewei Inventor before: Liu Jinjin Inventor before: Qiu Yuanxi Inventor before: Liu Houjun Inventor before: Yu Junjie Inventor before: Zheng Qinggang Inventor before: Xiao Haizhu Inventor before: Mei Xinyong Inventor before: Wang Heng Inventor before: Duan Xuewei Inventor before: Pan Tao |