CN113944099A - Gate-type pier capping beam built-in anti-seismic reinforcing steel bar structure and construction method thereof - Google Patents
Gate-type pier capping beam built-in anti-seismic reinforcing steel bar structure and construction method thereof Download PDFInfo
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- CN113944099A CN113944099A CN202111275234.3A CN202111275234A CN113944099A CN 113944099 A CN113944099 A CN 113944099A CN 202111275234 A CN202111275234 A CN 202111275234A CN 113944099 A CN113944099 A CN 113944099A
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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
- 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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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Abstract
The invention discloses a door-type pier capping beam built-in anti-seismic reinforcing steel bar structure and a construction method thereof, wherein the structure comprises pier columns, capping beams, load transmission straight ribs and capping beam stress arc ribs; the load transfer straight rib comprises a straight rib embedded section and a straight rib anchoring section which are fixedly connected, the straight rib embedded section extends and is fixed on the pier stud vertically, and the straight rib anchoring section extends and is fixed on the bent cap vertically; the bent cap stressed arc rib comprises an arc rib stressed section, one end of the arc rib stressed section correspondingly extends to the straight rib anchoring section, and the other end of the arc rib stressed section extends in an arc shape towards the direction far away from the straight rib anchoring section; the device can be through the straight muscle connection pier stud of solitary load transmission and bent cap, on the basis of guaranteeing the load transmission between pier stud and the bent cap, simultaneously through the atress of the bent cap atress arc muscle of anchor bearing bent cap alone to this realization bears the weight of the dual of bent cap atress, and then can reduce the length that is located the bent cap atress arc muscle of bent cap part, with this promotion stirrup installation effectiveness and quality.
Description
Technical Field
The invention relates to the technical field of construction of built-in reinforcing steel bars of bridge pier capping beams, in particular to a door type pier capping beam built-in anti-seismic reinforcing steel bar structure and a construction method thereof.
Background
With the explosive growth of urban traffic, the original urban road network cannot meet the traffic demand, the construction of urban bridges becomes an important way for further optimizing the urban road network structure, and new standard requirements on the performances of the urban bridges such as earthquake resistance, stress and the like are also met. However, the design construction theory and construction experience of the existing door-type pier capping beam are relatively few, and especially the door-type pier capping beam based on the earthquake-resistant design has no related design and construction experience.
In the prior art, referring to fig. 1 to 3, a single-strip steel bar is used as a built-in main bar 3 of a gate-type pier capping beam, one side end of the single-strip steel bar is embedded and positioned in a straight-line pier stud 1, and the single-strip steel bar extends from the top end of the straight-line pier stud 1 to the pouring position of a capping beam 2 in an arc-shaped steel bar form, so that pouring construction is performed on the basis of the single-strip steel bar, and at least the following problems exist:
1. the length of the arc-shaped steel bar at the part of the bent cap 2 is too long, the bent cap 2 deforms greatly after pouring, and the steel bar protective layer at the part of the steel bar of the bent cap 2 is difficult to ensure stability in the later period;
2. the arc-shaped reinforcing steel bars are large in labor input and machine resources, inconvenient to install and construct and low in efficiency;
3. the length of the arc-shaped steel bar positioned at the capping beam 2 part is too long, so that the stirrup 4 connected with the main reinforcement 3 in the capping beam variable cross-section part 21 transiting from the pier stud 1 to the capping beam 2 is difficult to install quickly, and the arc-shaped steel bar is also greatly deformed in the installation process of the stirrup 4, thereby also influencing the installation quality of the stirrup 4;
4. due to the anti-seismic design, the shape, the length and the mutual distance of the arc-shaped steel bars are small, and the design is difficult to optimize;
5. because bent cap 2 on pier stud 1 designs for pi type, consequently the stirrup 4 that is used for connecting built-in main muscle 3 of bent cap 2 can only select the level to install, and the limitation is big to stirrup 4 has increased the crotch design for reaching the antidetonation requirement, and the interval between the arc reinforcing bar is less in addition, leads to connecting 2 built-in main muscle 3's stirrup 4 of bent cap to be difficult to the construction of installation.
Disclosure of Invention
Therefore, the invention provides a door type pier capping beam built-in anti-seismic reinforcing steel bar structure and a construction method thereof, and aims to solve the technical problems of high construction difficulty, low construction quality and low efficiency caused by the single arc reinforcing steel bar construction method in the installation and construction process of door type pier capping beam built-in reinforcing steel bars in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
the gate-type pier capping beam is internally provided with an anti-seismic reinforcing steel bar structure and comprises two pier studs and a capping beam fixed above the two pier studs.
The steel bar structure comprises a load transfer straight bar and a bent cap stress arc bar which are independently arranged.
The load transmission straight rib comprises a straight rib embedded section and a straight rib anchoring section which are fixedly connected, the straight rib embedded section corresponds to the straight rib anchoring section along a straight line, the straight rib embedded section vertically extends and is fixed on the pier stud, and the straight rib anchoring section vertically extends and is fixed in the cover beam.
The bent cap stressed arc rib comprises an arc rib stressed section; the arc muscle atress section is circular-arc, and is circular-arc the one end correspondence of arc muscle atress section extends to straight muscle anchor section, and circular-arc the other end of arc muscle atress section is in the inside of bent cap is towards keeping away from the direction arc of straight muscle anchor section extends.
The arc-shaped concave side direction of the arc rib stress section faces obliquely downward.
On the basis of the above technical solution, the present invention is further explained as follows:
as a further aspect of the present invention, the straight rib embedded section vertically extends through the pier stud.
As a further scheme of the invention, a first anti-seismic hook is fixed at one end, far away from the cover beam, of the straight rib embedded section along the extension direction of the straight rib embedded section.
As a further scheme of the invention, a second anti-seismic hook is fixed at one end of the straight rib anchoring section, which is far away from the pier stud, along the extension direction of the straight rib anchoring section.
As a further scheme of the invention, the bent cap stressed arc rib further comprises a first arc rib anchoring section and a second arc rib anchoring section; the first arc rib anchoring section and the second arc rib anchoring section are fixedly connected with the arc rib stress section; the first arc rib anchoring section is located at one end of the arc rib stress section, and the second arc rib anchoring section is located at the other end of the arc rib stress section.
As a further scheme of the invention, the bent cap comprises a bent cap variable cross-section part in arc transition from the pier stud to the bent cap, and the arc rib stress section is arc-shaped and correspondingly positioned in the transition arc surface of the bent cap variable cross-section part.
As a further scheme of the invention, the first arc rib anchoring section extends horizontally and is fixed on the lower side of the variable cross-section part of the bent cap, and the first arc rib anchoring section vertically corresponds to the pier stud.
And the second arc rib anchoring section vertically extends and is fixed on the upper side of the variable cross-section part of the bent cap.
As a further scheme of the invention, a third anti-seismic hook is fixed at one end of the second arc rib anchoring section, which is far away from the arc rib stress section along the extension direction of the second arc rib anchoring section.
As a further scheme of the invention, the arc rib stress section is detachably and fixedly connected with the straight rib anchoring section.
A construction method is used for constructing a door type pier capping beam built-in anti-seismic steel bar structure, and comprises the following processes:
vertically embedding and pouring a straight rib embedded section in the load transfer straight ribs to the straight-line section pier stud, so that the bottom ends of the straight rib embedded sections correspondingly extend to the outer side of the bottom of the pier stud, and after the straight rib embedded sections are fixed, vertically reserving straight rib anchoring sections in the load transfer straight ribs on the outer side of the top of the pier stud;
fixing a first arc rib anchoring section in a plurality of groups of bent cap stressed arc ribs based on the straight rib anchoring section, so that the arc rib stressed sections in the bent cap stressed arc ribs all extend towards two sides along an arc shape, and the second arc rib anchoring sections in the corresponding bent cap stressed arc ribs all keep extending vertically;
hoops are respectively connected in a cross way among a plurality of groups of straight rib anchoring sections and among a plurality of groups of bent cap stressed arc ribs;
and respectively pouring the bent cap based on the straight rib anchoring section and the bent cap stress arc rib, and arranging arc transition at the bent cap variable cross section part of the pier stud in transition to the bent cap.
The invention has the following beneficial effects:
the device can be used for connecting the pier stud and the capping beam through the independent load transmission straight rib, on the basis of ensuring the load transmission between the pier stud and the capping beam, the stress of the capping beam is supported independently through the anchored capping beam stress arc rib, so that the dual bearing of the stress of the capping beam is realized, the length of the capping beam stress arc rib positioned at the capping beam part can be further reduced, the stirrup installation efficiency and the quality of the capping beam variable section part are higher, the integral deformation degree of the capping beam stress arc rib is less, the subsequent regular construction is not needed, and the construction efficiency and the capping beam steel bar protection layer qualification rate are improved; in addition, through the straight muscle of sectional type and the construction of being convenient for more of arc muscle, can show to reduce holistic installation construction degree of difficulty and the transportation degree of difficulty, further improve the efficiency of construction, quality and progress, effectively promoted above-mentioned steel bar structure's functional practicality.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly introduced, and the structures, the proportions, the sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the modifications of any structures, the changes of the proportion relationships, or the adjustments of the sizes, without affecting the functions and the achievable purposes of the present invention, and still fall within the scope of the technical contents disclosed in the present invention.
Fig. 1 is a schematic view showing the overall external structure of a prior art gate type pier capping beam.
Fig. 2 is a schematic view of a structure of built-in reinforcements of a gate-type pier capping beam in the prior art.
Fig. 3 is a schematic view of a stirrup and a hook thereof for connecting a main reinforcement at a variable cross-section part of a gate-type pier capping beam in the prior art.
Fig. 4 is a schematic structural view of an installation position of a load transfer straight rib in the door-type pier capping beam built-in anti-seismic reinforcing steel structure provided by the embodiment of the invention.
Fig. 5 is a schematic structural view of an overall installation position of a load transfer straight rib and a capping beam stressed arc rib in the door-type pier capping beam built-in anti-seismic reinforcing steel structure provided by the embodiment of the invention.
Fig. 6 is a schematic overall flow chart of a construction method for constructing a door-type pier capping beam built-in anti-seismic reinforcing steel structure according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
load transfer straight ribs 5: the vertical rib pre-buried section 51, the first anti-seismic hook 511, the vertical rib anchoring section 52 and the second anti-seismic hook 521;
bent cap stress arc rib 6: an arc rib stress section 61, a first arc rib anchoring section 62, a second arc rib anchoring section 63 and a third anti-seismic hook 64.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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 invention.
In the present specification, the terms "upper", "lower", "left", "right" and "middle" are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical change.
As shown in fig. 4 to 5, an embodiment of the present invention provides a door-type pier capping beam built-in anti-seismic reinforcing bar structure, where the door-type pier capping beam includes two piers 1 and a capping beam 2 fixed above the two piers 1, the built-in anti-seismic reinforcing bar structure includes two segments of load-transmitting straight bars 5 and capping beam stressed arc bars 6, and is used to connect the piers 1 and the capping beam 2 through the individual load-transmitting straight bars 5, and on the basis of ensuring the load transmission between the piers 1 and the capping beam 2, the anchored capping beam stressed arc bars 6 support the stress of the capping beam 2 individually, so as to realize dual bearing of the stress on the capping beam 2, and further reduce the length of the capping beam stressed arc bars 6 located at the capping beam 2 part, so that the installation efficiency and quality of the hoop bars 4 at the capping beam variable-section part 21 are higher, and at the same time, the deformation degree of the capping beam stressed arc bars 6 is less, and subsequent construction is not required again, the construction efficiency and the qualification rate of the cover beam 2 steel bar protection layer are improved; in addition, through the straight muscle of sectional type and the construction of being convenient for more of arc muscle, can show to reduce holistic installation construction degree of difficulty and the transportation degree of difficulty, further improve the efficiency of construction, quality and progress, effectively promoted above-mentioned steel bar structure's functional practicality. The specific settings are as follows:
as shown in fig. 4, the load transferring straight rib 5 includes a straight rib embedding section 51 and a straight rib anchoring section 52 integrally formed along a straight line; wherein, the vertical extension of the pre-buried section 51 of straight muscle is fixed in pier stud 1, the vertical extension of the pre-buried section 52 of straight muscle is fixed in the bent cap 2 on 1 top of pier stud, and calculates according to the atress, the vertical extension that passes whole straightway pier stud 1 of the pre-buried section 51 of straight muscle extends to the below ground, the vertical extension length of the anchor section 52 of straight muscle adopts 111cm for with the help of the straight muscle 5 of load transmission respectively with the pier stud 1 and the anchor between the bent cap 2 effect, effectively ensure the load transmission after the atress between pier stud 1 and the bent cap 2.
Preferably, a first anti-seismic hook 511 is fixed to one end of the straight rib embedded section 51, which is far away from the bent cap 2 along the extending direction of the straight rib embedded section 51, so that the anti-seismic and anti-shear performance of the pier column 1 based on the ground can be remarkably enhanced by means of the straight rib embedded section 51 and the first anti-seismic hook 511; the second anti-seismic hook 521 is fixed at one end of the straight rib anchoring section 52, which is far away from the pier column 1 along the extending direction of the straight rib anchoring section 52, so that the seismic and shear resistance of the coping 2 based on the pier column 1 can be remarkably enhanced by means of the straight rib anchoring section 52 and the second anti-seismic hook 521.
As shown in fig. 5, the bent cap stressed arc rib 6 comprises an integrally formed bent rib stressed section 61, a first bent rib anchoring section 62 and a second bent rib anchoring section 63; wherein, the arc rib stress section 61 is correspondingly positioned inside the transition arc surface of the bent cap variable cross section part 21 and extends along an arc, the first arc rib anchoring section 62 extends horizontally and is fixed at the lower side of the bent cap variable cross section part 21, the first arc rib anchoring section 62 is vertically corresponding to the pier stud 1, the second arc rib anchoring section 63 extends vertically and is fixed at the upper side of the bent cap variable cross section part 21 and is used for further effectively improving the stability of the bent cap 2 when bearing the upper load based on the arc rib stress section 61 through the first arc rib anchoring section 62 and the second arc rib anchoring section 63 and based on the straight rib anchoring section 52 under the bonding anchoring effect with concrete, meanwhile, the bent cap stress arc rib 6 is anchored and connected with the load transmission straight rib 5 respectively, the length of the bent cap stress arc rib 6 positioned at the part of the bent cap 2 can be reduced, and the installation difficulty of the stirrup 4 is reduced, make the bent cap become stirrup 4 installation effectiveness and the quality of cross-section portion 21 higher, bent cap atress arc muscle 6 holistic deformation degree still less simultaneously, need not follow-up regular construction once more, show the reinforcing bar protective layer qualification rate that has improved the efficiency of construction and bent cap 2 department.
It should be noted that the steel bar anchoring length of the bent cap stressed arc rib 6 is 35 d.
Preferably, a third anti-seismic hook 64 is fixed to one end of the second arc rib anchoring section 63, which is far away from the arc rib stress section 61 in the extending direction of the second arc rib anchoring section 63, so that the anti-seismic and anti-shear performance of the cover beam 2 based on the pier stud 1 can be further enhanced by means of the second arc rib anchoring section 63 and the third anti-seismic hook 64.
More preferably, the arc rib stress section 61 and the straight rib anchoring section 52 are detachably bound and fixed, so that the linkage of load transmission between the bent cap stress arc rib 6 and the load transmission straight rib 5 is effectively improved on the basis of more convenient transportation, installation and construction and concrete pouring construction after steel bars are flatly installed.
As shown in fig. 6, the construction method of the door-type pier capping beam built-in anti-seismic steel bar structure in the embodiment includes the following steps:
the vertical embedded pouring of the straight rib embedded sections 51 in the load transfer straight ribs 5 to the straight-line section pier stud 1 is achieved, so that the bottom ends of the straight rib embedded sections 51 correspondingly extend to the outer side of the bottom of the pier stud 1, and the bottom ends of the straight rib embedded sections 51 are bent to form first anti-seismic hooks 511.
After the straight rib embedded section 51 is fixed, the straight rib anchoring sections 52 in the load transfer straight ribs 5 are vertically reserved outside the top of the pier stud 1, the top ends of the straight rib embedded sections 51 are bent to form second anti-seismic hooks 521, and the vertical extending lengths of the straight rib anchoring sections 52 are 111 cm.
Based on the fixed first arc muscle anchor section 62 in a plurality of groups bent cap atress arc muscle 6 of straight muscle anchor section 52, make the arc muscle atress section 61 in a plurality of groups bent cap atress arc muscle 6 all extend to both sides along the arc to make the second arc muscle anchor section 63 in a plurality of groups bent cap atress arc muscle 6 that correspond all keep vertical extension, at the crooked third antidetonation crotch 64 that forms in the top of second arc muscle anchor section 63.
The stirrups 4 are respectively connected in a cross way among a plurality of groups of straight reinforcement anchoring sections 52 and among a plurality of groups of bent reinforcement stressed arc reinforcements 6, and hooks of 135 degrees are adopted on two sides of each stirrup 4.
The bent cap 2 is poured based on the straight rib anchoring section 52 and the bent cap stress arc rib 6 respectively, the bent cap variable section part 21 of the transition from the pier stud 1 to the bent cap 2 is provided with an arc transition with an arc radius of 1.5m, meanwhile, the bent cap 2 is arranged at the middle of the span and forms an arc with a radius of 45m, and the height of the bent cap 2 in the span is set to be 1.92/2.24 m.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A door-type pier capping beam built-in anti-seismic reinforcing steel bar structure is characterized in that the door-type pier capping beam comprises two pier columns and a capping beam fixed above the two pier columns,
the reinforcing steel bar structure comprises a load transmission straight bar and a bent cap stress arc bar which are independently arranged;
the load transfer straight rib comprises a straight rib embedded section and a straight rib anchoring section which are fixedly connected, the straight rib embedded section and the straight rib anchoring section are in linear correspondence, the straight rib embedded section is vertically extended and fixed on the pier stud, and the straight rib anchoring section is vertically extended and fixed inside the bent cap;
the bent cap stressed arc rib comprises an arc rib stressed section; the arc rib stress section is arc-shaped, one end of the arc rib stress section correspondingly extends to the straight rib anchoring section, and the other end of the arc rib stress section extends in an arc shape in the cover beam in a direction away from the straight rib anchoring section;
the arc-shaped concave side direction of the arc rib stress section faces obliquely downward.
2. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 1,
the straight rib embedded section vertically extends through the pier stud.
3. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 2,
and a first anti-seismic hook is fixed at one end of the straight rib embedded section, which is far away from the cover beam along the extension direction of the straight rib embedded section.
4. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 1,
and a second anti-seismic hook is fixed at one end of the straight rib anchoring section, which is far away from the pier stud along the extension direction of the straight rib anchoring section.
5. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 1,
the bent cap stressed arc rib further comprises a first arc rib anchoring section and a second arc rib anchoring section; the first arc rib anchoring section and the second arc rib anchoring section are fixedly connected with the arc rib stress section;
the first arc rib anchoring section is located at one end of the arc rib stress section, and the second arc rib anchoring section is located at the other end of the arc rib stress section.
6. The door-type pier capping beam built-in anti-seismic steel bar structure according to claim 5, wherein the capping beam comprises a capping beam variable-section part which is in arc transition from the pier stud to the capping beam, and is characterized in that,
the arc rib stress section is arc-shaped and is correspondingly positioned in the transition arc surface of the variable cross-section part of the bent cap.
7. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 6,
the first arc rib anchoring section extends horizontally and is fixed on the lower side of the variable cross-section part of the bent cap, and the first arc rib anchoring section vertically corresponds to the pier stud;
and the second arc rib anchoring section vertically extends and is fixed on the upper side of the variable cross-section part of the bent cap.
8. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 7,
and a third anti-seismic hook is fixed at one end of the second arc rib anchoring section, which is far away from the arc rib stress section along the extension direction of the second arc rib anchoring section.
9. The gate-type pier capping beam built-in anti-seismic steel bar structure according to claim 1,
the arc rib stress section is detachably and fixedly connected with the straight rib anchoring section.
10. A construction method for constructing the door type pier capping beam built-in anti-seismic steel bar structure according to any one of claims 1 to 9, comprising the steps of:
vertically embedding and pouring a straight rib embedded section in the load transfer straight ribs to the straight-line section pier stud, so that the bottom ends of the straight rib embedded sections correspondingly extend to the outer side of the bottom of the pier stud, and after the straight rib embedded sections are fixed, vertically reserving straight rib anchoring sections in the load transfer straight ribs on the outer side of the top of the pier stud;
fixing a first arc rib anchoring section in a plurality of groups of bent cap stressed arc ribs based on the straight rib anchoring section, so that the arc rib stressed sections in the bent cap stressed arc ribs all extend towards two sides along an arc shape, and the second arc rib anchoring sections in the corresponding bent cap stressed arc ribs all keep extending vertically;
hoops are respectively connected in a cross way among a plurality of groups of straight rib anchoring sections and among a plurality of groups of bent cap stressed arc ribs;
and respectively pouring the bent cap based on the straight rib anchoring section and the bent cap stress arc rib, and arranging arc transition at the bent cap variable cross section part of the pier stud in transition to the bent cap.
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| CN202111275234.3A CN113944099B (en) | 2021-10-29 | 2021-10-29 | Built-in anti-seismic steel bar structure of door pier capping beam and construction method thereof |
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| CN113944099B (en) | 2023-09-26 |
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