WO2022156157A1

WO2022156157A1 - Through arch bridge suspension bridge system reinforced by truss steel structure stiffened stringers and construction method therefor

Info

Publication number: WO2022156157A1
Application number: PCT/CN2021/105468
Authority: WO
Inventors: 黄卿维; 吴庆雄; 陈康明; 袁辉辉; 杨益伦
Original assignee: 福州大学
Priority date: 2021-01-21
Filing date: 2021-07-09
Publication date: 2022-07-28
Also published as: LU502338B1

Abstract

The present invention relates to the technical field of bridge engineering, and in particular, to a through arch bridge suspension bridge system reinforced by truss steel structure stiffened stringers and a construction method therefor. In the present invention, corbels, supports, suspenders, bridge decks, truss steel structure stiffened stringers, and concrete beams are provided on abutments, to achieve the effect of effectively using the through arch bridge suspension bridge system. The present invention has the advantages that an integral through support structure comprising the truss steel structure stiffened stringers and the concrete beams, taken as a whole, is high in rigidity and good in stability, the truss steel structure stiffened stringers are light in dead weight, high in flexural rigidity, and easy to construct, the deformation amount unfavorable for structural stress and generated by the integral through support structure due to temperature changes is small, and the overall reinforcement effect for the entire suspension bridge system is good, and has a great application value and good economic benefits.

Description

Under-supported arch bridge suspension bridge reinforced by truss steel structure stiffening longitudinal beams and its construction method

technical field

The invention belongs to the technical field of bridge engineering, and in particular relates to a suspension bridge track system of a bottom-supported arch bridge reinforced by stiffening longitudinal beams of a truss-type steel structure and a construction method thereof.

Background technique

my country has built a lot of down-bearing arch bridges. The early suspension bridge design was not based on stiffening longitudinal beams, but on beams. The suspension rods were also anchored at both ends of the beams, and then laid on the beams. The bridge deck, most of the beams are not provided with stiffening longitudinal beams. At this stage, after several years of operation and use of many down-type arch bridges, their suspension bridges have many diseases, such as excessive bridge deck vibration, serious bridge deck damage, falling off bearings, etc. The bridge deck collapsed due to the accidental break of the boom, or even the entire bridge collapsed, resulting in irreparable economic losses.

With the occurrence of many major accidents and various types of diseases caused by the damage of the suspension bridges of the lower bearing arch bridges, researchers and designers have gradually paid attention to the setting of stiffening longitudinal beams. For the reinforcement of the suspension bridge system of the type arch bridge, some choose to add concrete stiffened longitudinal beams, which have high rigidity and good vibration resistance, but are self-heavy, significantly increase the load on the suspension rod, and the construction is difficult, and some choose to add steel. Structural steel beams are used as stiffened longitudinal beams, but the material of the integrated steel stiffened longitudinal beams and the concrete structure of the bridge system is different, resulting in inconsistent deformation under the influence of temperature, resulting in new diseases such as beam displacement, concrete cracking, and bearing falling off. Appear.

Therefore, it is necessary to design a lower-loaded arch bridge suspension bridge reinforced with truss-type steel structure stiffened longitudinal beams and its construction method, which is light in weight, high in rigidity, reasonable in structural stress, convenient in construction and excellent in durability. It effectively solves the problems of insufficient overall stiffness and poor stability of the suspended bridge channel system of the bottom-bearing arch bridge, and can fully release the deformation of the stiffened longitudinal beam of the truss-type steel structure caused by the temperature change, which is not conducive to the stress of the structure.

The Chinese utility model patent with the patent announcement number CN211571359U and the announcement date of 2020.09.25 discloses a down-supported arch bridge that increases the lateral stiffness of the main girder and reduces the horizontal thrust of the foundation, including arch ribs, arch seats, main beams, connecting arches The rib and the suspending cable of the main beam, the two sides of the main beam are tensioned with horizontal cables along the longitudinal bridge direction, and the support rods are arranged between the main beam and the horizontal cables, and the horizontal cables are connected to the horizontal cables through the support rods. The main beam forms a lateral limit connection of several nodes.

technical problem

However, the down-supported arch bridge in this utility model patent has the problems of insufficient bending rigidity and difficulty in overall construction.

technical solutions

The purpose of the present invention is to provide a kind of under-supported arch bridge suspension bridge reinforced with truss-type steel structure stiffening longitudinal beams and a construction method thereof. , truss steel structure to stiffen longitudinal beams and concrete beams, to achieve the effect of effective use of the suspension bridge channel system of the lower bearing arch bridge. The invention has the advantages of high overall rigidity and good stability of the integral under-supporting support structure including the truss-type steel structure stiffening longitudinal beam and the concrete transverse beam, the truss-type steel structure stiffening longitudinal beam being light in dead weight, large in bending rigidity, and easy to construct, and The integral bottom-bearing support structure has the advantages of small deformation that is not conducive to the stress of the structure due to temperature changes, and has the advantages of good overall reinforcement effect of the entire suspension bridge system, and has great application value and good economic benefits.

The technical solution adopted by the present invention to solve the above problems is: a suspension bridge system of a bottom-supported arch bridge reinforced by truss-type steel structure stiffening longitudinal beams, comprising an arch seat, a corbel arranged on the arch seat, The supports on the legs, the suspension rods, and the bridge deck also include truss-type steel structure stiffening longitudinal beams arranged on the supports, and between the two adjacent truss-type steel structure stiffening longitudinal beams and at both ends. The concrete beams on which the hangers are installed and used to support the deck.

A further preferred technical solution is: the truss-type steel structure stiffening longitudinal beam includes four longitudinal main pipes, horizontal branch pipes arranged between the two longitudinal main pipes at the same level, and two longitudinal pipes arranged on the same side. The vertical branch pipes, the inclined branch pipes between the main pipes, and the outer anchoring steel plates arranged at the ends of the four longitudinal main pipes and used for connecting the concrete beams.

A further preferred technical solution is that the truss-type steel structure stiffening longitudinal beam further includes a stiffening steel plate disposed on the side of the outer anchoring steel plate away from the concrete beam and used for connecting the longitudinal main pipe.

A further preferred technical solution is that: the truss-type steel structure stiffening longitudinal beam further includes an installation hole provided on the outer anchoring steel plate.

A further preferred technical solution is that: the installation holes include implant screw holes disposed between the upper and lower sets of the longitudinal main pipes, and two sets of finish-rolled threaded steel bars respectively disposed outside the upper and lower two sets of the longitudinal main pipes.

A further preferred technical solution is that: the concrete beam includes a concrete beam main body with the hanger rods on both ends of the upper surface and the outer anchoring steel plates respectively installed on the two vertical sides, arranged on the concrete beam main body and passing through it. Finished threaded steel bars passing through the finishing threaded steel bar holes, and implanted screws disposed on the concrete beam main body and passing through the implanted screw holes.

A further preferred technical solution is that the finishing threaded steel bar has protruding ends on both sides of the concrete beam main body, and one end of the implanted screw rod is arranged outside the concrete beam main body.

A further preferred technical solution is that: the truss-type steel structure stiffening longitudinal beam further includes a steel plate opening arranged on the outer anchoring steel plate and used to pass through the longitudinal main pipe, and the concrete beam also includes The two vertical sides of the main body of the concrete beam are slotted in the main body for inserting the protruding end of the longitudinal main pipe.

A further preferred technical solution is that: the two sides of the outer anchoring steel plate are provided with the stiffening steel plate, and the concrete beam also includes two vertical sides respectively disposed on the main body of the concrete beam and used for inserting the steel plate. The steel plate is stiffened and communicated with the main body channel of the main body slot.

A construction method for a suspension bridge track system of a bottom-supported arch bridge reinforced by stiffening longitudinal beams of a truss-type steel structure, comprising the following steps in sequence:

S1, welding the longitudinal main pipe, the horizontal branch pipe, the vertical branch pipe, the inclined branch pipe, the outer anchoring steel plate and the stiffening steel plate, to obtain the stiffened longitudinal beam of the truss-type steel structure;

S2, pre-embed finish-rolled threaded steel bars and implanted screws on the main body of the concrete beam, and set a main body slot and a main channel on the side of the main body of the concrete beam to obtain the concrete beam, and separate and fix it;

S3, opening a hole on the inner side of the abutment, implanting an anchor rod, and installing the corbel;

S4. Fix the truss-type steel structure stiffening longitudinal beams on both sides of the concrete beam respectively, and complete the installation of the truss-type steel structure stiffening longitudinal beams with multiple sections in the middle;

S5. Fix the last two truss-type steel structure stiffening longitudinal beams at both ends on the temporary supports on the corbels, and connect them with the concrete beams to complete the overall structure of the bottom-bearing arch bridge;

S6, the temporary support is replaced with the permanent support, and the construction of the entire suspension bridge system of the lower-supported arch bridge reinforced by the truss-type steel structure stiffening longitudinal beams is completed.

beneficial effect

The invention achieves the effect of effectively using the suspension bridge track system of the lower-supported arch bridge by arranging corbels, supports, suspension rods, bridge decks, truss-type steel structure stiffening longitudinal beams and concrete transverse beams on the arch seat. The invention has the advantages of high overall rigidity and good stability of the integral under-supporting support structure including the truss-type steel structure stiffening longitudinal beam and the concrete transverse beam, the truss-type steel structure stiffening longitudinal beam being light in dead weight, large in bending rigidity, and easy to construct, and The integral bottom-bearing support structure has the advantages of small deformation that is not conducive to the stress of the structure due to temperature changes, and has the advantages of good overall reinforcement effect of the entire suspension bridge system, and has great application value and good economic benefits.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the arch bridge suspension bridge track system in the present invention.

FIG. 2 is a schematic diagram of the position structure of the arch seat in the present invention.

FIG. 3 is a schematic diagram of the connection structure of the stiffened longitudinal beam of the truss-type steel structure and the concrete beam in the present invention.

FIG. 4 is a schematic vertical cross-sectional view of a stiffened longitudinal beam of a truss-type steel structure in the present invention.

FIG. 5 is a schematic diagram of the position structure of the main body slot in the present invention.

FIG. 6 is a schematic view of the front structure of the main body slot and the main body channel in the present invention.

Embodiments of the present invention

The following descriptions are only preferred embodiments of the present invention, and do not limit the scope of the present invention.

Example: As shown in Figures 1, 2, 3, 4, 5 and Figure 6, the suspension bridge system of the lower-supported arch bridge reinforced by the truss-type steel structure stiffening longitudinal beams, including the arch seat 11, is arranged in the The corbel 12 on the arch 11 , the support 13 provided on the corbel 12 , the suspension rod 14 , and the bridge deck 15 , and the truss-type steel structure stiffening longitudinal beam 1 provided on the support 13 , and the concrete beams 2 arranged between the adjacent truss-type steel structure stiffening longitudinal beams 1 with the suspension rods 14 installed at both ends and used to support the bridge deck 15 .

In this embodiment, a concrete beam 2 is arranged between several truss-type steel structure stiffening longitudinal beams 1, and the concrete beam 2 directly supports the bridge deck 15. The truss-type steel structure stiffening longitudinal beams 1 are supported on the supports 13 to complete the bottom-supporting support and reinforcement structure of the entire arch bridge suspension bridge system.

In addition, the supports 13 are arranged on the corbels 12 to support the load of the entire bottom-supporting and reinforcing structure, and at the same time release the deformation of the bottom-supporting and reinforcing structure caused by temperature changes.

The truss-type steel structure stiffening longitudinal beam 1 includes four longitudinal main pipes 101, a horizontal branch pipe 102 arranged between the two longitudinal main pipes 101 at the same level, and a horizontal branch pipe 102 arranged between the two longitudinal main pipes 101 on the same side. The vertical branch pipes 103 and the inclined branch pipes 104 between them, and the outer anchoring steel plates 105 arranged at the ends of the four longitudinal main pipes 101 and used for connecting the concrete beams 2 .

In this embodiment, the vertical main pipe 101, the horizontal branch pipe 102, the vertical branch pipe 103 and the inclined branch pipe 104 can all be steel plates or shaped steels of different sizes, and the contact points are welded firmly, and the vertical branch pipe 103 and the inclined branch pipe 104 are arranged at intervals, and the shape of the outer anchoring steel plate 105 can be a rectangle, a circle, a triangle, a diamond, a Japanese-shaped or a mesh-shaped.

The truss-type steel structure stiffening longitudinal beam 1 further includes a stiffening steel plate 106 disposed on the side of the outer anchoring steel plate 105 away from the concrete beam 2 and used for connecting the longitudinal main pipe 101 .

In this embodiment, the stiffening steel plate 106 is perpendicular to the outer anchoring steel plate 105 , and it is sufficient to ensure that each longitudinal main pipe 101 has at least four welding strengthening positions of the stiffening steel plate 106 .

The truss-type steel structure stiffening longitudinal beam 1 further includes an installation hole provided on the outer anchoring steel plate 105 . The installation holes include implant screw holes 107 arranged between the upper and lower sets of the longitudinal main tubes 101 , and two sets of finish-rolled threaded steel bar holes 108 respectively arranged on the outer sides of the upper and lower sets of the longitudinal main tubes 101 .

In this embodiment, the implanted screw hole 107 and the finish-rolled threaded steel bar hole 108 are fixed installation positions between the truss-type steel structure stiffening longitudinal beam 1 and the concrete beam 2 to ensure that the entire lower bearing The reinforced structure has good integrity and high structural strength.

The concrete beam 2 includes a concrete beam main body 201 on which the hanger rods 14 are respectively provided at both ends of the upper surface, and the outer anchoring steel plates 105 are respectively installed on the two vertical sides, which are arranged on the concrete beam main body 201 and pass through the The finishing threaded steel bar 202 in the finishing threaded steel bar hole 108 , and the implanted screw rod 203 disposed on the concrete beam main body 201 and passing through the implanted screw hole 107 .

In this embodiment, the finish-rolled threaded steel bar 202 may be fixed on the concrete beam main body 201, or a hole may be pre-opened on the concrete beam body 201, and the finish-rolled threaded steel bar 202 can be inserted into the opening, that is, Can.

The finish-rolled threaded steel bars 202 on the upper and lower sides cooperate with the implanted screw 203 in the middle to ensure sufficient installation stability of the outer anchoring steel plate 105 on the concrete beam main body 201 .

The finishing threaded steel bar 202 has protruding ends on both sides of the concrete beam main body 201 , and one end of the implanted screw rod 203 is disposed outside the concrete beam main body 201 . The truss-type steel structure stiffening longitudinal beam 1 also includes a steel plate opening 109 arranged on the outer anchoring steel plate 105 and used to pass through the longitudinal main pipe 101. The main body 201 has main body slots 204 on two vertical sides for inserting the protruding end of the longitudinal main pipe 101 . The two sides of the outer anchoring steel plate 105 are provided with the stiffening steel plates 106, and the concrete beam 2 also includes two vertical sides respectively disposed on the concrete beam main body 201 and used for inserting the stiffening steel plates 106. and communicate with the main body channel 205 of the main body slot 204 .

In this embodiment, the protruding end of the longitudinal main pipe 101 on the other side of the outer anchoring steel plate 105 is inserted into the main body slot 204, so that the longitudinal main pipe 101 and the concrete beam main body 201 are connected. There is a direct installation structure between them, which further ensures the installation strength of the truss-type steel structure stiffening longitudinal beam 1 on the concrete beam main body 201 .

In addition, the stiffening steel plates 106 are divided into two groups, which are respectively arranged on two sides of the outer anchoring steel plates 105, so that the group of the stiffening steel plates 106 close to the concrete beam main body 201 can be inserted into the main body. The purpose of the channel 205 is also to assist in the reinforcement of the longitudinal main pipe 101 and the concrete beam main body 201, to ensure the high stability of the entire under-supported reinforcement structure, and to have a pre-aligned plug-in relationship, which is convenient for subsequent overall construction operations. .

S1, welding the longitudinal main pipe 101, the horizontal branch pipe 102, the vertical branch pipe 103, the inclined branch pipe 104, the outer anchoring steel plate 105 and the stiffening steel plate 106 to obtain the truss-type steel structure stiffening longitudinal beam 1;

S2. Pre-embed the finished-rolled threaded steel bar 202 and the implanted screw rod 203 on the concrete beam main body 201, and set a main body slot 204 and a main body channel 205 on the side surface of the concrete beam main body 201 to obtain the concrete beam. 2, and separated and fixed;

S3, opening a hole on the inner side of the abutment 11, implanting an anchor rod, and installing the corbel 12;

S4, respectively fix the truss-type steel structure stiffening longitudinal beam 1 on both sides of the concrete beam 2, and complete the installation of the truss-type steel structure stiffening longitudinal beam 1 with multiple sections in the middle;

S5, the last two described truss-type steel structure stiffening longitudinal beams 1 at both ends are fixed on the temporary supports on the described corbels 12, and are connected with the described concrete beams 2 to complete the overall structure of the lower-bearing arch bridge;

S6, the temporary support is replaced with the permanent support 13, and the construction of the entire suspension bridge system of the lower-supported arch bridge reinforced by the truss-type steel structure stiffening longitudinal beams is completed.

In this embodiment, the parts not mentioned in the construction method are all carried out in the way of the prior art, and it is sufficient to ensure that the above-mentioned suspension bridge system of the under-supported arch bridge can be obtained during construction. It has the advantages of simple construction, high efficiency and high application value.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the technical field, it can also be done without departing from the purpose of the present invention. various modifications. These are all non-creative modifications, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

The suspension bridge road system of a down-supported arch bridge reinforced by truss-type steel structure stiffening longitudinal beams includes an arch seat (11), a corbel (12) arranged on the abutment (11), and a corbel (12) arranged on the corbel (11). 12) on the support (13), the suspension rod (14), and the bridge deck (15), characterized in that it further comprises a truss-type steel structure stiffening longitudinal beam (1) arranged on the support (13) , and a concrete beam (2) arranged between the adjacent truss-type steel structure stiffening longitudinal beams (1) and having the suspension rods (14) installed at both ends and used for supporting the bridge deck (15).
The undercarriage arch bridge suspension bridge reinforced with truss-type steel structure stiffening longitudinal beams according to claim 1, characterized in that: the truss-type steel structure stiffening longitudinal beams (1) comprise four longitudinal main pipes (101) , a horizontal branch pipe (102) arranged between the two longitudinal main pipes (101) at the same horizontal height, a vertical branch pipe (103) arranged between the two longitudinal main pipes (101) on the same side, inclined Branch pipes (104), and outer anchoring steel plates (105) arranged at the ends of the four longitudinal main pipes (101) and used for connecting the concrete beams (2).
The under-supported arch bridge suspension bridge system reinforced with truss-type steel structure stiffening longitudinal beams according to claim 2, characterized in that: the truss-type steel structure stiffening longitudinal beams (1) further comprise an anchorage structure provided on the outer shell. A stiffening steel plate (106) on the side of the steel plate (105) remote from the concrete beam (2) and used to connect the longitudinal main pipe (101).
The under-supported arch bridge suspension bridge reinforced with truss-type steel structure stiffening longitudinal beams according to claim 3, characterized in that: the truss-type steel structure stiffening longitudinal beams (1) further comprise an anchorage structure provided on the outer shell. Mounting holes in steel plate (105).
The undercarriage arch bridge suspension bridge reinforced with truss-type steel structure stiffening longitudinal beams according to claim 4, characterized in that: the installation hole comprises a set of upper and lower sets of longitudinal main pipes (101). The screw holes (107) are implanted, and the two groups of finish-rolled threaded steel bars (108) are respectively arranged on the outer sides of the upper and lower groups of the longitudinal main pipes (101).
The under-supported arch bridge suspension bridge reinforced by truss-type steel structure stiffening longitudinal beams according to claim 5, characterized in that: the concrete beam (2) includes the suspension rods (14) respectively provided at both ends of the upper surface ), the concrete beam main body (201) of the outer anchoring steel plate (105) is respectively installed on the two vertical sides, and the concrete beam main body (201) is arranged on the concrete beam main body (201) and passes through the finish-rolled threaded steel bar hole (108). Finished threaded steel bars (202), and an implanted screw (203) arranged on the concrete beam main body (201) and passing through the implanted screw hole (107).
The under-supported arch bridge suspension bridge reinforced by truss-type steel structure stiffening longitudinal beams according to claim 6, characterized in that: the finish-rolled threaded steel bars (202) are on both sides of the concrete beam main body (201). Each has a protruding end, and one end of the implanted screw (203) is arranged outside the concrete beam main body (201).
The undercarriage arch bridge suspension bridge reinforced with truss-type steel structure stiffening longitudinal beams according to claim 6, characterized in that: the truss-type steel structure stiffening longitudinal beam (1) further comprises an A steel plate opening (109) on the steel plate (105) and used to pass through the longitudinal main pipe (101), the concrete beam (2) further comprises two vertical sides respectively disposed on the concrete beam main body (201) And for inserting the main body slot (204) of the protruding end of the longitudinal main pipe (101).
The undercarriage arch bridge suspension bridge system reinforced with truss-type steel structure stiffening longitudinal beams according to claim 8, characterized in that: the stiffening steel plates are provided on both sides of the outer anchoring steel plate (105) (106), the concrete beam (2) further comprises a slot (204) respectively disposed on the two vertical sides of the concrete beam main body (201) and used for inserting the stiffening steel plate (106) and communicating with the main body main body channel (205).
A construction method for the suspension bridge track system of a bottom-supported arch bridge reinforced with truss-type steel structure stiffening longitudinal beams as claimed in claim 9, characterized in that the following steps are included in sequence:

S1. Weld the longitudinal main pipe (101), the horizontal branch pipe (102), the vertical branch pipe (103), the inclined branch pipe (104), the outer anchoring steel plate (105) and the stiffening steel plate (106) to obtain the truss steel structure stiffening stringer (1);

S2. Pre-embed the finished-rolled threaded steel bar (202) and the implanted screw (203) on the concrete beam main body (201), and set a main body slot (204) on the side surface of the concrete beam main body (201) and a main body channel (205) to obtain the concrete beam (2), which is separated and fixed;

S3, opening a hole on the inner side of the abutment (11), implanting an anchor rod, and installing the corbel (12);

S4. Fix the truss-type steel structure stiffening longitudinal beam (1) on both sides of the concrete beam (2) respectively, and complete the installation of the truss-type steel structure stiffening longitudinal beam (1) with multiple sections in the middle;

S5. Fix the last two truss-type steel structure stiffening longitudinal beams (1) at both ends on the temporary supports on the corbels (12), and connect them with the concrete beams (2) to complete the lower bearing The overall structure of the arch bridge;

S6. The temporary support is replaced with the permanent support (13), and the construction of the entire suspension bridge system of the lower-supported arch bridge reinforced by the truss-type steel structure stiffening longitudinal beam is completed.