CN103590324B - Transverse shear resisting section type self-resetting pier and construction method thereof - Google Patents
Transverse shear resisting section type self-resetting pier and construction method thereof Download PDFInfo
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- CN103590324B CN103590324B CN201310522820.2A CN201310522820A CN103590324B CN 103590324 B CN103590324 B CN 103590324B CN 201310522820 A CN201310522820 A CN 201310522820A CN 103590324 B CN103590324 B CN 103590324B
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Abstract
The invention relates to a transverse shear resisting section type self-resetting pier and a construction method thereof. The pier comprises a transverse shear resisting pier bottom section, a plurality of transverse shear resisting pier body sections and a transverse shear resisting pier top section. The transverse shear resisting pier bottom section, the transverse shear resisting pier body sections and the transverse shear resisting pier top section are connected through meshing connecting faces and shear resisting bolts. The pier further comprises a plurality of self-resetting components. The self-resetting components penetrates and are anchored to the transverse shear resisting pier bottom section, the transverse shear resisting pier body sections and the transverse shear resisting pier top section through reserved holes. The invention further provides a mounting method of the pier. The self-resetting pier is simple in structure and convenient in material taking. The mounting method is simple, practical, safe and reliable, and the actual application difficult of section type concrete piers is solved.
Description
Technical field
The present invention relates to bridge engineering and Structural Engineering field, be specifically related to a kind of sectional type Self-resetting bridge pier and construction method thereof of horizontal shearing resistance.
Background technology
Along with the high speed development of China's economic society, the fast development of particularly highway and railway traffic, the design scheme of bridge construction is faced with higher requirement, wherein the mechanical property of bridge pier and convenience for construction particularly important.
Routine is conceived to guarantee to meet with the bridge security under extreme load situation, its excellent in mechanical performance based on the concrete pier of Ductility Design, and ductile deformation's ability is strong, is widely used.But in Practical Project, the concrete pier of global design is difficult to avoid following deficiency: (a) concrete one-time-concreting amount is comparatively large, pouring quality is difficult to ensure, and pumping of concrete Capability Requirement is high; B () monolithic bridge pier, once major injury destroys, usually needs full-bridge pier to remove and repairs, bring huge financial burden; C () long construction period, there is larger potential safety hazard in the cast-in-place required formwork bracing system of work progress.
Sections mounting technology has good economy and convenience for construction, can be generalized to concrete pier.The application prospect of sectional type concrete pier has benefited from its following outstanding advantage: the component of (a) sectional type concrete pier can machine at pre-fabricated factory, shorten construction period and the interruption of communication that may bring of constructing, save social economy's cost, for the railway and highway system of Modern High-Speed development and busy transport provides effective solution; B () sectional type concrete pier can possess effective self-resetting capability after outfit post-stress reinforcing bar, realize affinedly waving mechanism in macroseism, permanent set after shake is controlled within acceptable scope, and then improves the anti-seismic performance of Life cycle; C () sectional type concrete pier can meet quality control and life requirement preferably, can build environment by Effective Regulation component, avoid cast in situs in pre-fabricated factory, the particularly impact that brings of adverse circumstances that are over strait, river-spanning bridge; D the negative effect of () sectional type concrete pier to construction safety and ecological environment is less, the reduction of site work amount will shorten the on-the-spot duration, and the minimizing of formwork-support usage quantity will reduce the potential danger of the security of the lives and property.
Section assembling technology releases the affixed constraint between bridge pier and cushion cap, for the Self-resetting mechanism formed under limited waving provides necessary condition, for the development of novel Self-resetting bridge pier system is laid a good foundation.But, simply section assembling is carried out to concrete pier and can introduce new technical problem, such as: lack effective shearing resistance mechanism between bridge pier sections to resist shearing, the lateral rigidity of bridge pier obviously weakens because of the existence of seam between sections.At present, ripe solution is lacked for above problem, constrains the popularization of section assembling bridge pier in engineer applied to a certain extent.
The assembling sections Self-resetting bridge pier being provided with occlusion junction effectively can overcome the problems referred to above, forms safe and reliable bridge abutment integral, for engineering design application provides function admirable, and convenient construction, the scheme of economical rationality.Occlusion junction defines reliable horizontal shearing resistance mechanism at segmental joints place, ensured effective Shear transfer between sections; Simultaneously Self-resetting assembly is that Self-resetting mechanism after the initial lateral rigidity of bridge pier abundance and severe earthquake action provides powerful guarantee, and then improve the mechanical property of its Life cycle, being a kind of sectional type concrete pier scheme of reasonable, is the development and improvement to concrete pier technical system.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of sectional type Self-resetting bridge pier and construction method thereof of horizontal shearing resistance, solving the problem lacking reasonable shear connections assembly in existing sectional type concrete pier technology; Simultaneously by additional prestressing Self-resetting assembly, realize automatic recovery ability after the shake of bridge pier; Self-resetting bridge pier structure of the present invention is succinct, dependable performance, and technical foundation has been established in the extensive use for sectional type concrete pier; Construction method of the present invention is convenient feasible, economical and practical.
For reaching above object, the present invention adopts following technical scheme:
A kind of sectional type Self-resetting bridge pier of horizontal shearing resistance, comprise horizontal shearing resistance pier coxopodite section 1, multiple horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3, described horizontal shearing resistance pier coxopodite section 1, to be all connected with shearing resistance latch 5 by occlusion junction 4 between multiple horizontal shearing resistance pier shaft sections 2 with horizontal shearing resistance pier epimerite section 3, also to comprise and to be run through by reserving hole channel and to be anchored in multiple Self-resetting assemblies 6 of described horizontal shearing resistance pier coxopodite section 1, multiple horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3.
Described occlusion junction 4 is inverted trapezoidal.
Described shearing resistance latch 5 is connected to the seam crossing of adjacent segment.
Described shearing resistance latch 5 arranges multiple at the seam crossing interval of adjacent segment.
Described Self-resetting assembly 6 adopts post tensioning no-cohesive prestressed reinforcement, high-strength pull bar or FRP lacing wire.
The construction method of the sectional type Self-resetting bridge pier of horizontal shearing resistance described above, comprises the steps:
Step 1: adopt prefabrication or site prefabrication to prepare horizontal shearing resistance pier coxopodite section (1), horizontal shearing resistance pier shaft sections (2) and horizontal shearing resistance pier epimerite section (3);
Step 2: shearing resistance latch (5) is set in the upper reserved hole corresponding with horizontal shearing resistance pier coxopodite section (1), horizontal shearing resistance pier shaft sections (2) and horizontal shearing resistance pier epimerite section (3) of pedestal (8), and Self-resetting assembly (6) is penetrated the upper reserving hole of pedestal (8), the length of Self-resetting assembly (6) will ensure to leave preset length on horizontal shearing resistance pier epimerite section (3) top, carries out anchoring to Self-resetting assembly (6);
Step 3: horizontal shearing resistance pier coxopodite section (1) is put in place along oriented Self-resetting assembly (6) lifting, then horizontal shearing resistance pier shaft sections (2) of Piecemeal erection, shearing resistance latch (5) is set after each sections installs, until install all horizontal shearing resistance pier shaft sections (2);
Step 4: install horizontal shearing resistance pier epimerite section (3), and at horizontal shearing resistance pier epimerite section (3) top, post tensioning anchoring Shi Hanzhang is carried out to Self-resetting assembly (6), complete assembling construction.
In the sectional type Self-resetting bridge pier of horizontal shearing resistance provided by the present invention, it is overall that horizontal shearing resistance pier coxopodite section 1, horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3 three class pier stud assembly adopt the method for precast assembly to form pier stud.Horizontal shearing resistance pier coxopodite section 1, horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3 all have inverted trapezoidal configuration, can be used for effectively chimeric adjacent sections, while reliable Shear transfer mechanism is provided, allow bridge pier sections, along bridge pier pier shaft axis direction, certain opening and closing occur, form segmental joints folding mechanism, for its Self-resetting performance provides necessary condition.
In the sectional type Self-resetting bridge pier of horizontal shearing resistance provided by the present invention, occlusion junction 4 is for effectively chimeric adjacent concrete sections, while providing transverse shearing force to transmit, allow bridge pier sections, along pier shaft axis direction, certain opening and closing occur, form the folding mechanism between segmental joints; Shearing resistance latch 5 is longitudinally arranged continuously between segmental joints, forms effectively supplementing occlusion junction 4, can provide effective Shear transfer when lateral load is larger, avoids shearing dislocation, to form bridge abutment integral safely and reliably.Self-resetting assembly 6 is generally made up of a series of soap-free emulsion polymeization post-stress muscle, horizontal shearing resistance pier coxopodite section 1, horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3 is assembled complete after, by applying anchoring bottom horizontal shearing resistance pier epimerite section 3 top and cushion cap, apply suitable prestressing force, to realize the Self-resetting performance of bridge pier; By post tensioning unbonded prestressing tendon between pier epimerite section and cushion cap, based on the folding mechanism between sections, the Self-resetting performance of bridge pier can be formed.On the one hand, post-stress controllably can apply the prestressing force of suitable magnitude to bridge pier, for the safety of bridge pier routine use state and comfortableness provide safeguard; On the other hand, the treatment technology of soap-free emulsion polymeization can make presstressed reinforcing steel and other pier shaft components keep comparatively obvious in strain differential, thus under severe earthquake action, overall process keeps elasticity, avoids plasticity permanent set, effectively realizes the Self-resetting function of sectional type bridge pier.
In the sectional type Self-resetting bridge pier of horizontal shearing resistance provided by the present invention, it is advantageous that compared with integral concrete bridge pier: concrete segment does not need to consider the anchorage depth in basis, but as the element of a site operation, can by segmental construction, high efficient and flexible is convenient; Require lower to construction plant, difficulty of construction is less, does not need a large amount of formwork-support systems, can reduce construction safety hidden danger.By arranging shearing resistance latch 5 continuously along bridge pier pier shaft axis, ensureing the general safety of sectional type bridge pier when there is to shear dislocation dangerous, as supplementing of occlusion junction shearing resistance mechanism, having formed " dual fail-safe " of the horizontal shearing resistance of sectional type bridge pier.
The present invention has following beneficial effect relative to prior art:
(1) application scheme of sectional type concrete pier is achieved by the horizontal shearing resistance sections of occlusion junction.The horizontal shearing resistance sections of occlusion junction can ensure the effective Transfer of Shear of concrete segment, effective controlling distortion, simultaneously the segmental joints place feature that limited folding can be kept again to be out of shape, for the introducing of Self-resetting performance provides the foundation.
(2) shearing resistance latch 5 can form the auxiliary shearing resistance mechanism between bridge pier sections effectively, as supplementing of the horizontal shearing resistance of occlusion junction, avoids the shearing changing of the relative positions of sectional type bridge pier, the excessive increase of restrained deformation.
(3) Self-resetting assembly 6 can the Life cycle mechanical property of effective lifting section segmentation concrete pier, the lateral rigidity of bridge pier can not only be improved under routine use condition, restoring force can be provided after the extreme load effects such as macroseism simultaneously, reduce plasticity permanent set, greatly improve mechanical property and repairerment property after the shake of bridge pier.
(4) in the present invention all components draw materials conveniently, structure is succinct, and the mode of production can adopt prefabrication to process substantially, and the component on site construction method of Self-resetting assembly 6 is also simple, workable.
(5) the invention solves the practical challenge of sectional type concrete pier, scheme does not increase difficulty of construction and operation compared to existing technology, provides reliable and secure construction method and technical scheme, constructs quick and convenient flexibly, practical.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the sectional type Self-resetting bridge pier adopting horizontal shearing resistance.
Fig. 2 is horizontal shearing resistance pier epimerite section schematic diagram.
Fig. 3 is horizontal shearing resistance pier epimerite section top view.
Fig. 4 is horizontal shearing resistance pier shaft sections schematic diagram.
Fig. 5 is the schematic cross-section of horizontal shearing resistance pier shaft sections and pier coxopodite section.
Fig. 6 is horizontal shearing resistance pier coxopodite section schematic diagram.
Fig. 7 is construction method flow chart of the present invention.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the sectional type Self-resetting bridge pier of a kind of horizontal shearing resistance of the present invention, comprise the horizontal shearing resistance pier coxopodite section 1 be arranged on pedestal 8, multiple horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3, described horizontal shearing resistance pier coxopodite section 1, to be all mutually fitted together to by occlusion junction 4 between multiple horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3, to adopt the method for precast assembly to form pier stud overall.Shearing resistance latch 5 is arranged continuously between sections, coordinates occlusion junction 4 to realize effective transmission of shearing.Also comprise and to be run through by reserving hole channel and to be anchored in multiple Self-resetting assemblies 6 of described horizontal shearing resistance pier coxopodite section 1, multiple horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3, Self-resetting assembly 6 applies suitable prestressing force by anchoring, can be sectional type bridge pier and self-resetting capability is provided, corresponding hole need be reserved when precast segment.The present embodiment occlusion junction 4 is inverted trapezoidal.
As the preferred embodiment of the present invention, described Self-resetting assembly 6 adopts post tensioning no-cohesive prestressed reinforcement, high-strength pull bar or FRP lacing wire.
As shown in Figure 2 and Figure 3, horizontal shearing resistance pier epimerite section 3 top needs after assembled completing, and by ground tackle post tensioning unbonded prestressing tendon, as the Self-resetting assembly of bridge pier, Self-resetting assembly is uniform along bridge pier junction periphery; Pier epimerite section need install the connection bearing between bridge pier and superstructure simultaneously.
Respectively as shown in Figure 4 and Figure 6, adjacent segment is fitted together to by the occlusion junction of inverted trapezoidal the schematic diagram of horizontal shearing resistance pier shaft sections 2 and horizontal shearing resistance pier epimerite section 3 each other, forms effective pass force crossly mechanism; The schematic cross-section of horizontal shearing resistance pier shaft sections and pier coxopodite section as shown in Figure 5, arrange respectively at the middle part of junction and both sides, intersegmental shearing can be avoided to misplace, need reserve corresponding hole when precast segment by shearing resistance latch 5.
As shown in Figure 7, the construction method of the sectional type Self-resetting bridge pier of the horizontal shearing resistance of the present invention, comprise the steps: that (a) adopts pre-fabricated factory prefabricated subsection, the mode of the on-the-spot assembling of section is section by section constructed, pedestal carries out design reinforcement according to specification, simultaneously hole needed for reserved shearing resistance latch 5 and Self-resetting assembly 6 and to the corresponding hole aligning of prefabricated subsection; B Self-resetting assembly 6 is passed reserving hole by (), and carry out effective anchoring to it bottom cushion cap; C horizontal shearing resistance pier coxopodite section 1 puts in place along oriented Self-resetting assembly 6 lifting by (), assembled horizontal shearing resistance pier shaft sections 2 piecemeal, shearing resistance latch 5 is set after each sections installs, until install all horizontal shearing resistance pier shaft sections 2, then horizontal shearing resistance pier epimerite section 3 is installed; D () carries out post tensioning anchoring Shi Hanzhang at horizontal shearing resistance pier epimerite section 3 top to Self-resetting assembly 6, then install suitable bearing.
The sectional type Self-resetting bridge pier of horizontal shearing resistance provided by the invention and construction method thereof, can be applied in the bridge construction project of highway and railway conscientiously, plays the outstanding advantage of its convenience for construction and the rear recoverability of shake.The horizontal shearing resistance sections of occlusion junction coordinates shearing resistance latch effectively can transmit transverse shearing force, avoids the shearing changing of the relative positions of sectional type bridge pier, the excessive increase of restrained deformation; Intersegmental limited folding mechanism can be kept again, by introducing the mechanical property of Self-resetting assembly lifting section segmentation concrete pier simultaneously.The present invention can not only improve the lateral rigidity of bridge pier under routine use condition, simultaneously can provide self-recoverage power after the extreme load effects such as macroseism, reduces plasticity permanent set, effectively improves recoverability after the shake of bridge pier.The invention solves the practical challenge of sectional type concrete pier, scheme does not increase difficulty of construction and operation compared to existing technology, the convenience of drawing materials of component used, simple structure, substantially prefabrication can be adopted to process, and the practical application for sectional type concrete pier provides safe and reliable construction method and technical scheme.
Claims (4)
1. the sectional type Self-resetting bridge pier of a horizontal shearing resistance, comprise horizontal shearing resistance pier coxopodite section (1), multiple horizontal shearing resistance pier shaft sections (2) and horizontal shearing resistance pier epimerite section (3), it is characterized in that: described horizontal shearing resistance pier coxopodite section (1), multiple horizontal shearing resistance pier shaft sections (2) is all connected with shearing resistance latch (5) by occlusion junction (4) with between horizontal shearing resistance pier epimerite section (3), also comprise and to be run through by reserving hole channel and to be anchored in described horizontal shearing resistance pier coxopodite section (1), multiple Self-resetting assemblies (6) of multiple horizontal shearing resistance pier shaft sections (2) and horizontal shearing resistance pier epimerite section (3), described occlusion junction (4) is inverted trapezoidal, described shearing resistance latch (5) is connected to the seam crossing of adjacent segment.
2. the sectional type Self-resetting bridge pier of a kind of horizontal shearing resistance according to claim 1, is characterized in that: described shearing resistance latch (5) arranges multiple at the seam crossing interval of adjacent segment.
3. the sectional type Self-resetting bridge pier of a kind of horizontal shearing resistance according to claim 1, is characterized in that: described Self-resetting assembly (6) adopts post tensioning no-cohesive prestressed reinforcement, high-strength pull bar or FRP lacing wire.
4. the construction method of the sectional type Self-resetting bridge pier of the horizontal shearing resistance described in any one of claims 1 to 3, is characterized in that: comprise the steps:
Step 1: adopt prefabrication or site prefabrication to prepare horizontal shearing resistance pier coxopodite section (1), horizontal shearing resistance pier shaft sections (2) and horizontal shearing resistance pier epimerite section (3);
Step 2: shearing resistance latch (5) is set in the upper reserved hole corresponding with horizontal shearing resistance pier coxopodite section (1), horizontal shearing resistance pier shaft sections (2) and horizontal shearing resistance pier epimerite section (3) of pedestal (8), and Self-resetting assembly (6) is penetrated the upper reserving hole of pedestal (8), the length of Self-resetting assembly (6) will ensure to leave preset length on horizontal shearing resistance pier epimerite section (3) top, carries out anchoring to Self-resetting assembly (6);
Step 3: horizontal shearing resistance pier coxopodite section (1) is put in place along oriented Self-resetting assembly (6) lifting, then horizontal shearing resistance pier shaft sections (2) of Piecemeal erection, shearing resistance latch (5) is set after each sections installs, until install all horizontal shearing resistance pier shaft sections (2);
Step 4: install horizontal shearing resistance pier epimerite section (3), and at horizontal shearing resistance pier epimerite section (3) top, post tensioning anchoring Shi Hanzhang is carried out to Self-resetting assembly (6), complete assembling construction.
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| CN103590324B true CN103590324B (en) | 2015-06-17 |
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| CN104120647B (en) * | 2014-07-04 | 2016-09-14 | 上海应用技术学院 | It is suitable for section assembling concrete frame bridge pier system and the construction method of rapid construction |
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| CN104343080B (en) * | 2014-09-29 | 2016-10-05 | 北京工业大学 | Basis bridge pier structure mode is waved in precast segment assembly |
| CN107435293B (en) * | 2017-07-06 | 2019-02-15 | 东南大学 | Pre-stress FRP bar stretching and anchoring device and its construction method for precast assembly bridge pier |
| CN107806010A (en) * | 2017-10-23 | 2018-03-16 | 南京林业大学 | A kind of assembled multiple tube seawater marine sand concrete bridge pier and preparation method |
| CN107938499A (en) * | 2018-01-11 | 2018-04-20 | 西南科技大学 | A kind of prefabricated assembled bridge pier |
| CN110359360A (en) * | 2019-05-13 | 2019-10-22 | 中国公路工程咨询集团有限公司 | Self- recoverage bridge pier structure and bridge |
| CN111041978B (en) * | 2019-12-11 | 2021-03-30 | 郑州第二市政建设集团有限公司 | Anti-seismic pier column structure |
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