阅读说明：本技术 一种新型系杆拱桥结构及附属的系杆布置方法 (Novel tied arch bridge structure and auxiliary tied bar arrangement method ) 是由 詹刚毅 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种新型系杆拱桥结构及附属的系杆布置方法,包括主拱拱肋结构,主拱拱肋结构一侧设有中跨系杆,另一侧设有边跨系杆和通长系杆,中跨系杆一端通过系杆锚固件锚固于主拱拱肋结构和主梁梁端处；边跨系杆一端通过系杆锚固件二锚固于主拱拱肋结构内侧和主梁处；通长系杆锚固于主梁间。本发明与现有技术相比的优点在于：有效的利用系杆拱桥中三类系杆的作用,增加整体结构的稳定性及降低了施工难度,为运营阶段不中断交通调节结构内力及更换系杆提供了条件,实现了全寿命周期管理。(The invention discloses a novel tied arch bridge structure and an auxiliary tied bar arrangement method, wherein the novel tied arch bridge structure comprises a main arch rib structure, one side of the main arch rib structure is provided with a mid-span tied bar, the other side of the main arch rib structure is provided with an edge-span tied bar and a through-length tied bar, and one end of the mid-span tied bar is anchored at the main arch rib structure and the girder end through a tied bar anchoring part; one end of the side span tie bar is anchored at the inner side of the main arch rib structure and the main beam through a tie bar anchoring part II; the full-length tie rod is anchored between the main beams. Compared with the prior art, the invention has the advantages that: the effects of three types of tie bars in the tied arch bridge are effectively utilized, the stability of the whole structure is improved, the construction difficulty is reduced, conditions are provided for uninterrupted traffic regulation of the internal force of the structure and replacement of the tie bars in the operation stage, and the whole life cycle management is realized.)

1. A novel tied arch bridge structure and an auxiliary tied bar arrangement method comprise a main arch rib structure (1), and are characterized in that: one side of the main arch rib structure (1) is provided with a mid-span tie rod (2), the other side of the main arch rib structure is provided with an edge-span tie rod (3) and a through-length tie rod (4), and one end of the mid-span tie rod (2) is anchored at the main arch rib structure (1) and the end of a girder through a tie rod anchoring piece I (5);

one end of the side span tie bar (3) is anchored at the inner side of the main arch rib structure (1) and the main beam through a tie bar anchoring piece II (6);

the through-length tie rod (4) is anchored between the main beams;

the tie bar arrangement method is as follows:

s1, installing the main arch rib structure (1);

s2, simultaneously tensioning the mid-span tie bar (2) and the side-span tie bar (3);

s3, after the steel beam at the midspan tie bar (2) is installed, tensioning the through tie bar (4);

s4, gradually adjusting the mid-span tie rod (2), the side-span tie rod (3) and the full-length tie rod (4), and finally stabilizing to a bridging tie rod force.

2. A novel bowstring arch bridge structure and an associated method of tiebar deployment, as set forth in claim 1, wherein: the installation positions of the tie bars in the vertical direction are the side span tie bar (3), the mid-span tie bar (2) and the through length tie bar (4) from top to bottom in sequence.

3. A novel bowstring arch bridge structure and an associated method of tiebar deployment, as set forth in claim 1, wherein: the first tie bar anchoring piece (5) and the second tie bar anchoring piece (6) are formed by welding steel plates, and shear keys, reinforced steel plates and anchoring steel bars are welded on the steel plates;

the tie bar anchoring piece I (5) and the tie bar anchoring piece II (6) are poured together with a concrete arch rib of the main arch rib structure (1), and the mid-span tie bar (2), the side-span tie bar (3) and the full-length tie bar (4) are tensioned on a steel plate.

4. A novel bowstring arch bridge structure and an associated method of tiebar deployment, as set forth in claim 1, wherein: the mid-span tie rod (2), the side-span tie rod (3) and the full-length tie rod (4) are tensioned in batches by using jacks during tensioning.

Technical Field

The invention relates to bridge construction, in particular to a novel tied arch bridge structure and an auxiliary tied bar arrangement method.

Background

With the development of urbanization in China, bridges crossing rivers in cities are more and more, arch bridges are greatly popularized with attractiveness, and the half-through arch bridge is widely applied. The half-through arch bridge generally has the problem of overlarge horizontal force at the arch springing position, and the overlarge horizontal force of the arch springing easily causes overlarge shearing force on concrete at the arch springing position, thereby having adverse effect on the stress of a concrete structure and influencing the durability of the structure. The tie bars in the tied arch bridge mainly balance horizontal force and do not bear bending moment, and can be regarded as a force transmission component and a component for controlling the elevation of the bridge deck.

The rigid tie rods are eccentric tension members, generally arranged in an i-shaped or box-shaped cross-section. Because the absolute values of the positive and negative bending moments of the cross section generally have little difference, the reinforcing steel bars are preferably arranged symmetrically or nearly symmetrically by the upper and lower edges. Meanwhile, a certain amount of distributed reinforcing steel bars are arranged along the height of the section, so that crack expansion is prevented. Meanwhile, a transverse broken joint is arranged in the traffic lane, so that the traffic lane does not participate in the stress of the tie bars, and the traffic lane is simply supported on the cross beam. This form is well stressed and has many applications.

The tied arch bridge has three kinds of tie bars, including middle-span tie bar, side-span tie bar and full-length tie bar. The main functions of these tie bars are to balance the horizontal thrust of the arch bridge, to increase the structural rigidity, etc. The mid-span tie bars are used for reducing horizontal force transmitted to the lower part from the upper part of the beam surface of the main arch, the side-span short tie bars are used for adjusting internal force of each component in a triangular area, and the full-length tie bars are used for balancing unbalanced thrust between the main arch and the side arches. The function of each tie bar in the structure is different, and the tie bars of the common arch bridge are independently arranged and do not consider the function of the combined tie bars on the whole system.

Therefore, a novel tied arch bridge structure and an auxiliary tied bar arrangement method are imperatively designed.

Disclosure of Invention

The invention aims to solve the technical problems that only one tie rod fixing structure is generally adopted in the existing arch bridge structure, and in actual use, the arch bridge structure is low in bearing capacity and poor in applicability and does not meet the requirements of the existing arch bridge function.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a novel tied arch bridge structure and an auxiliary tied bar arrangement method comprise a main arch rib structure, wherein a mid-span tied bar is arranged on one side of the main arch rib structure, an edge-span tied bar and a full-length tied bar are arranged on the other side of the main arch rib structure, and one end of the mid-span tied bar is anchored at the main arch rib structure and the end of a girder through a tied bar anchoring part I;

one end of the side span tie bar is anchored at the inner side of the main arch rib structure and the main beam through a tie bar anchoring part II;

the full-length tie rod is anchored between the main beams;

the tie bar arrangement method is as follows:

s1, mounting a main arch rib structure;

s2, simultaneously tensioning the mid-span tie bar and the side-span tie bar;

s3, stretching the through-length tie bars after the steel beams at the midspan tie bars are installed;

and S4, gradually adjusting the mid-span tie rod, the side-span tie rod and the full-length tie rod, and finally stabilizing to the bridge-forming tie rod force.

Compared with the prior art, the invention has the advantages that: the arch bridge structure and the tie bar arrangement method can effectively utilize the effects of the three types of tie bars in the tie bar arch bridge, increase the stability of the whole structure, reduce the construction difficulty, provide conditions for uninterrupted traffic regulation of the internal force of the structure and replacement of the tie bars in the operation stage, and realize the management of the whole life cycle.

As an improvement, the installation positions of the tie bars in the vertical direction are a side span tie bar, a mid-span tie bar and a full-length tie bar from top to bottom in sequence.

The first tie bar anchoring part and the second tie bar anchoring part are formed by welding steel plates, and shear keys, reinforced steel plates and anchoring steel bars are welded on the steel plates;

the first tie bar anchoring piece and the second tie bar anchoring piece are poured together with a concrete arch rib of the main arch rib structure, and the mid-span tie bar, the side-span tie bar and the full-length tie bar are tensioned on a steel plate.

As an improvement, the middle span tie bar, the side span tie bar and the full length tie bar are tensioned in batches by using jacks during tensioning.

Drawings

Fig. 1 is a schematic structural diagram of a novel tied arch bridge structure and an auxiliary tie bar arrangement method.

As shown in the figure: 1. the main arch rib structure comprises a main arch rib structure 2, a mid-span tie rod 3, a side-span tie rod 4, a full-length tie rod 5, tie rod anchoring pieces I and 6 and a tie rod anchoring piece II.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention is implemented in detail, a novel tied arch bridge structure and an auxiliary tied bar arrangement method, the novel tied arch bridge structure comprises a main arch rib structure 1, one side of the main arch rib structure 1 is provided with a mid-span tied bar 2, the other side of the main arch rib structure is provided with an edge-span tied bar 3 and a through-length tied bar 4, and one end of the mid-span tied bar 2 is anchored at the main arch rib structure 1 and a main girder end through a tied bar anchoring part 5;

one end of the side span tie bar 3 is anchored at the inner side of the main arch rib structure 1 and the main beam through a tie bar anchoring piece II 6;

the through-length tie bars 4 are anchored between the main beams;

the tie bar arrangement method is as follows:

s1, installing the main arch rib structure 1;

s2, simultaneously tensioning the mid-span tie bar 2 and the side-span tie bar 3;

s3, after the steel beam at the midspan tie bar 2 is installed, tensioning the through tie bar 4;

s4, adjusting the mid-span tie bar 2, the side-span tie bar 3 and the through-length tie bar 4 step by step, and finally stabilizing to the bridging tie bar force.

The tie bar installation positions in the vertical direction are the side span tie bar 3, the mid-span tie bar 2 and the full length tie bar 4 from top to bottom in sequence.

The first tie bar anchoring piece 5 and the second tie bar anchoring piece 6 are formed by welding steel plates, and shear keys, reinforced steel plates and anchoring steel bars are welded on the steel plates;

the first tie bar anchoring piece 5 and the second tie bar anchoring piece 6 are poured together with the concrete arch rib of the main arch rib structure 1, and the mid-span tie bar 2, the side-span tie bar 3 and the full-length tie bar 4 are tensioned on a steel plate.

The mid-span tie bar 2, the side-span tie bar 3 and the full-length tie bar 4 are tensioned in batches by using jacks during tensioning.

The working principle of the invention is as follows: the structure comprises a concrete main arch rib structure 1, a mid-span tie bar 2 anchored between the outer sides of the main arch rib structure 1, an edge-span tie bar 3 anchored between a main beam and the inner side of the main arch rib structure 1, a full-length tie bar 4 anchored between the main beams, a tie bar anchoring piece I5 for anchoring the tie bar, and a tie bar anchoring piece 6 for anchoring the tie bar.

The tie bar anchoring piece is fixed at the concrete main arch and the girder end, the tie bar is anchored on the tie bar anchoring piece, and the tie bar needs to be tensioned in batches by a jack; the three tie bars are respectively a side span tie bar 3, a mid span tie bar 2 and a full length tie bar 4 from top to bottom.

The tie bar anchoring part is formed by welding steel plates, a shear key, a reinforced steel plate and an anchoring steel bar are welded on the steel plates, the main arch concrete arch ribs of the tie bar anchoring part are poured together, and the tie bar is tensioned on the steel plates.

The tensioning sequence of the tie bars is as follows: after the main arch rib structure 1 is installed, the mid-span tie bar 2 and the side-span tie bar 3 are simultaneously tensioned, the through-length tie bar 4 is tensioned after the steel beam at the mid-span tie bar 2 is installed, then the mid-span and side-span short tie bars and the through-length tie bar are gradually adjusted, and finally the tie bar force is stabilized to the bridge-forming tie bar force.

A triangular area with extremely strong stability is formed by the beam-arch combination section, the side-arch cross beam and the main-arch cross beam, and the arrangement of the middle pier upright column shares the load of the side-arch main span side of the side beam, so that the permanent horizontal thrust of the main-arch side is effectively reduced. Meanwhile, four expansion joints are arranged in the structure, so that horizontal constraints between the side span and the main arch and between the main span and the main arch are released, and boundary conditions for setting three types of tie bars are provided. The rigidity of a triangular area in the construction process is improved through the side span short tie bars, and the structural stability is improved; the horizontal force of the steel structure part of the arch rib is reduced through the mid-span short tie bar, and the construction difficulty is reduced; through leading long tie rod, the structure security has been increased, for the operation stage does not break traffic regulation structure internal force and change the tie rod and provide the condition, realized the life cycle management.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the invention, "plurality" means two or more unless explicitly specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.