阅读说明：本技术 一种钢桥箱形特大压力杆件的新型加劲构造及其施工方法 (Novel stiffening structure of steel bridge box-shaped super-large pressure rod piece and construction method thereof ) 是由 毛利炎 杨小飞 徐进 李雪南 何春林 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种钢桥箱形特大压力杆件的新型加劲构造,包括第一钢桥箱形压力杆件、加劲安装外架、第二钢桥箱形压力杆件和第三钢桥箱形压力杆件。本发明在压力杆件的外部设置有加劲结构安装过程,可对于压力杆件的外侧牢固安装加劲结构,该加劲结构上安装有多根加劲钢筋,加劲钢筋可以直通到压力杆件的底部,可为该压力杆件起到良好的辅助支撑效果,也一定程度上提高了该压力杆件的整体结构强度,不易变形,且对于压力杆件本身设计为分段组装式,在对于压力杆件进行安装时,可将各个压力杆件进行组合,通过在压力杆件上安装有定位组合销轴,该组合销轴可有效避免出现压力杆安装错位,或端面无法对齐的情况,提高了压力杆件组装的精准度。(The invention discloses a novel stiffening structure of a steel bridge box-shaped super-large pressure rod piece, which comprises a first steel bridge box-shaped pressure rod piece, a stiffening installation outer frame, a second steel bridge box-shaped pressure rod piece and a third steel bridge box-shaped pressure rod piece. The invention is provided with a stiffening structure installation process outside the pressure member, can firmly install the stiffening structure on the outer side of the pressure member, is provided with a plurality of stiffening steel bars, can be directly communicated to the bottom of the pressure member, can play a good auxiliary supporting effect for the pressure member, also improves the overall structural strength of the pressure member to a certain extent, is not easy to deform, is designed into a sectional assembly type for the pressure member, can combine each pressure member when the pressure member is installed, and can effectively avoid the condition that the pressure member is installed in a dislocation way or the end surfaces can not be aligned through installing the positioning combined pin shaft on the pressure member, thereby improving the assembling accuracy of the pressure member.)

1. The utility model provides a novel structure of putting more energy into of super large pressure member of steel bridge box, includes first steel bridge box pressure member (2), puts more energy into installation outrigger (3), second steel bridge box pressure member (5) and third steel bridge box pressure member (6), its characterized in that: and a second steel bridge box-shaped pressure rod piece (5) is fixedly welded at the top of the third steel bridge box-shaped pressure rod piece (6), a first steel bridge box-shaped pressure rod piece (2) is fixedly welded at the top of the second steel bridge box-shaped pressure rod piece (5), and the stiffening installation outer frame (3) is fixedly installed outside the first steel bridge box-shaped pressure rod piece (2) through a fixing screw (4).

2. The novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece as claimed in claim 1, wherein: the external structures of the first steel bridge box-shaped pressure rod piece (2), the second steel bridge box-shaped pressure rod piece (5) and the third steel bridge box-shaped pressure rod piece (6) are all box-shaped.

3. The novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece as claimed in claim 1, wherein: the bottom fixed mounting of putting more energy into installation outrigger (3) has stiffening steel bar (1), and a plurality of are installed in parallel to each other in stiffening steel bar (1).

4. The novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece as claimed in claim 1, wherein: the third steel bridge box-shaped pressure rod piece (6) is composed of a pressure bearing transverse frame (63), a pressure bearing middle frame (64) and a pressure bearing longitudinal frame (65), and the pressure bearing transverse frame (63) and the pressure bearing middle frame (64) are welded and fixed on the side wall of the pressure bearing longitudinal frame (65).

5. The novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece as claimed in claim 4, wherein: two pressure bearing transverse frames (63) are symmetrically arranged about the central axis of the pressure bearing middle frame (64).

6. The novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece as claimed in claim 4, wherein: and a connecting reinforcing hole (62) is formed in the pressure bearing longitudinal frame (65), and one end of the fixing screw (4) is screwed into the connecting reinforcing hole (62).

7. The novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece as claimed in claim 4, wherein: and a positioning combined pin shaft (61) is welded and fixed at the top of the pressure bearing longitudinal frame (65), and the third steel bridge box-shaped pressure rod piece (6) is connected with the second steel bridge box-shaped pressure rod piece (5) in a positioning mode through the positioning combined pin shaft (61).

8. A construction method for a novel stiffening structure of a steel bridge box-shaped extra-large pressure rod piece according to any one of claims 1 to 7, which is characterized by comprising the following steps:

s1, blanking, cutting a plurality of large steel bridge box-shaped pressure rod pieces by using a cutting device, drilling a plurality of necessary connecting holes on the surfaces of the steel bridge box-shaped pressure rod pieces by using a drilling machine, further fixing the connecting parts of the pressure bearing frames of the steel bridge box-shaped pressure rod pieces by spot welding by using a spot welding machine, and storing the processed steel bridge box-shaped pressure rod pieces for later use;

s2, placing the reinforced box-shaped pressure rod pieces of the steel bridge into a cleaning machine one by one, increasing the temperature in the cleaning machine, and cleaning the box-shaped pressure rod pieces of the steel bridge for a period of time through cleaning liquid;

s3, taking out the cleaned steel bridge box-shaped pressure rod pieces and placing the steel bridge box-shaped pressure rod pieces into a spraying device one by one, increasing the temperature in the device, and carrying out baking intervention treatment on the steel bridge box-shaped pressure rod pieces for a period of time;

s4, after drying pretreatment, opening a spraying head, spraying anticorrosive finish paint on the steel bridge box-shaped pressure rod piece, and after spraying, increasing the temperature in the device to dry and cure the anticorrosive finish paint for a period of time;

s5, taking out the steel bridge box-shaped pressure rod pieces, installing the steel bridge box-shaped pressure rod pieces on a large hoisting machine, hoisting the steel bridge box-shaped pressure rod pieces to a water body by using the large hoisting machine, and inserting and combining other steel bridge box-shaped pressure rod pieces with the previous steel bridge box-shaped pressure rod piece through a positioning combination pin shaft to form a butt-joint combination of a plurality of steel bridge box-shaped pressure rod pieces;

s6, carrying out electric welding on the connecting nodes of each steel bridge box-shaped pressure rod piece by using an electric welding machine, and connecting and combining the steel bridge box-shaped pressure rod pieces into a whole;

s7, measuring the overall height of the finally assembled steel bridge box-shaped pressure rod piece by using a measuring instrument, and recording;

s8, according to the integral height of the steel bridge box-shaped pressure rod piece, performing equal-height cutting on the stiffening installation outer frame and the stiffening steel bars, and keeping the integral height of the stiffening steel bars and the steel bridge box-shaped pressure rod piece consistent;

s9, mounting the stiffening installation outer frame and the stiffening steel bars on a hoisting machine, lifting the stiffening installation outer frame and the stiffening steel bars by using the hoisting machine, and directly sleeving the stiffening installation outer frame and the stiffening steel bars above the first steel bridge box-shaped pressure rod piece until reaching the bottom of a third steel bridge box-shaped pressure rod piece;

s10, on the lifting tower, using the air gun to screw in the fixing screws at the joints with different heights, and fixing the stiffening installation outer frame stably to complete the whole construction process.

9. The construction method of the novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece according to the claim 8, is characterized in that: and in the step S2, the drying temperature is 40-60 ℃, the cleaning liquid is a hydrocarbon metal degreasing cleaning liquid, and the cleaning time is 10-15 min.

10. The construction method of the novel stiffening structure of the steel bridge box-shaped extra-large pressure rod piece according to the claim 8, is characterized in that: and in the step S3, the temperature in the device is increased to 60-80 ℃, the drying pretreatment time is 25-35min, in the step S4, the anticorrosive finish paint is alkyd finish paint, the temperature in the device is increased to 125-145 ℃, and the drying and curing time of the finish paint is 65-85 min.

Technical Field

The invention belongs to the technical field of steel bridge box-shaped super-large pressure members, and particularly relates to a novel stiffening structure of a steel bridge box-shaped super-large pressure member and a construction method thereof.

Background

Steel bridges are bridges made of steel as a main building material. The steel bridge has the characteristics of high strength and high rigidity, can reduce the height and the dead weight of a beam relative to a concrete bridge, and can meet the working condition of the bridge with the assumption of calculation graphic representation due to the isotropy, uniform texture and high elastic modulus of steel. However, the steel bridge has poor fire resistance and corrosion resistance, frequent inspection and maintenance are required, the maintenance cost is high, and the box-shaped super-large pressure rod piece of the steel bridge is an important structure on the steel bridge and is a weight-bearing foundation of the steel bridge.

The traditional steel bridge box-shaped super-large pressure rod piece is not installed and constructed in a stiffening structure outside, so that the steel bridge box-shaped super-large pressure rod piece can only effectively support the steel bridge through the traditional steel bridge box-shaped super-large pressure rod piece, the strength of the whole structure cannot be enhanced, the traditional steel bridge box-shaped super-large pressure rod piece is not designed to be of a multi-section combined type, the pressure rod piece is troublesome to assemble, and certain improvement is needed.

Disclosure of Invention

The invention aims to provide a novel stiffening structure of a steel bridge box-shaped super large pressure rod piece and a construction method thereof, and aims to solve the problems that the traditional steel bridge box-shaped super large pressure rod piece in the background technology is not installed and constructed outside, so that the steel bridge box-shaped super large pressure rod piece can only effectively support the steel bridge through the traditional steel bridge box-shaped super large pressure rod piece, the integral structural strength cannot be enhanced, and the traditional steel bridge box-shaped super large pressure rod piece is not designed to be of a multi-section combined type, so that the pressure rod piece is troublesome to assemble.

In order to achieve the purpose, the invention provides the following technical scheme: a novel stiffening structure of a steel bridge box-shaped extra-large pressure rod piece comprises a first steel bridge box-shaped pressure rod piece, a stiffening installation outer frame, a second steel bridge box-shaped pressure rod piece and a third steel bridge box-shaped pressure rod piece, wherein the second steel bridge box-shaped pressure rod piece is fixedly welded at the top of the third steel bridge box-shaped pressure rod piece, the first steel bridge box-shaped pressure rod piece is fixedly welded at the top of the second steel bridge box-shaped pressure rod piece, and the stiffening installation outer frame is fixedly installed outside the first steel bridge box-shaped pressure rod piece through fixing screws.

Preferably, the external structures of the first steel bridge box-shaped pressure rod piece, the second steel bridge box-shaped pressure rod piece and the third steel bridge box-shaped pressure rod piece are all box-shaped.

Preferably, the bottom of the stiffening installation outer frame is fixedly provided with stiffening steel bars, and the stiffening steel bars are arranged in parallel with each other and provided with a plurality of reinforcing steel bars.

Preferably, the third steel bridge box-shaped pressure rod piece consists of a pressure bearing transverse frame, a pressure bearing middle frame and a pressure bearing longitudinal frame, and the pressure bearing transverse frame and the pressure bearing middle frame are welded and fixed on the side wall of the pressure bearing longitudinal frame.

Preferably, two pressure bearing cross frames are symmetrically arranged on the pressure bearing middle frame about the central axis.

Preferably, a connecting and reinforcing hole is formed in the pressure bearing longitudinal frame, and one end of the fixing screw is screwed into the connecting and reinforcing hole.

Preferably, a positioning combined pin shaft is welded and fixed at the top of the pressure bearing longitudinal frame, and the third steel bridge box-shaped pressure rod piece is connected with the second steel bridge box-shaped pressure rod piece in a positioning mode through the positioning combined pin shaft.

The invention also provides a construction method of the novel stiffening structure of the box-shaped super-large pressure rod piece of the steel bridge, and the manufacturing process comprises the following steps:

s1, blanking, cutting a plurality of large steel bridge box-shaped pressure rod pieces by using a cutting device, drilling a plurality of necessary connecting holes on the surfaces of the steel bridge box-shaped pressure rod pieces by using a drilling machine, further fixing the connecting parts of the pressure bearing frames of the steel bridge box-shaped pressure rod pieces by spot welding by using a spot welding machine, and storing the processed steel bridge box-shaped pressure rod pieces for later use;

s2, placing the reinforced box-shaped pressure rod pieces of the steel bridge into a cleaning machine one by one, increasing the temperature in the cleaning machine, and cleaning the box-shaped pressure rod pieces of the steel bridge for a period of time through cleaning liquid;

s3, taking out the cleaned steel bridge box-shaped pressure rod pieces and placing the steel bridge box-shaped pressure rod pieces into a spraying device one by one, increasing the temperature in the device, and carrying out baking intervention treatment on the steel bridge box-shaped pressure rod pieces for a period of time;

s4, after drying pretreatment, opening a spraying head, spraying anticorrosive finish paint on the steel bridge box-shaped pressure rod piece, and after spraying, increasing the temperature in the device to dry and cure the anticorrosive finish paint for a period of time;

s5, taking out the steel bridge box-shaped pressure rod pieces, installing the steel bridge box-shaped pressure rod pieces on a large hoisting machine, hoisting the steel bridge box-shaped pressure rod pieces to a water body by using the large hoisting machine, and inserting and combining other steel bridge box-shaped pressure rod pieces with the previous steel bridge box-shaped pressure rod piece through a positioning combination pin shaft to form a butt-joint combination of a plurality of steel bridge box-shaped pressure rod pieces;

s6, carrying out electric welding on the connecting nodes of each steel bridge box-shaped pressure rod piece by using an electric welding machine, and connecting and combining the steel bridge box-shaped pressure rod pieces into a whole;

s7, measuring the overall height of the finally assembled steel bridge box-shaped pressure rod piece by using a measuring instrument, and recording;

s8, according to the integral height of the steel bridge box-shaped pressure rod piece, performing equal-height cutting on the stiffening installation outer frame and the stiffening steel bars, and keeping the integral height of the stiffening steel bars and the steel bridge box-shaped pressure rod piece consistent;

s9, mounting the stiffening installation outer frame and the stiffening steel bars on a hoisting machine, lifting the stiffening installation outer frame and the stiffening steel bars by using the hoisting machine, and directly sleeving the stiffening installation outer frame and the stiffening steel bars above the first steel bridge box-shaped pressure rod piece until reaching the bottom of a third steel bridge box-shaped pressure rod piece;

s10, on the lifting tower, using the air gun to screw in the fixing screws at the joints with different heights, and fixing the stiffening installation outer frame stably to complete the whole construction process.

Preferably, in the step S2, the drying temperature is 40-60 ℃, the cleaning solution is a hydrocarbon metal degreasing cleaning solution, and the cleaning time is 10-15 min.

Preferably, in S3, the temperature in the device is increased to 60-80 ℃, the drying pretreatment time is 25-35min, in S4, the anticorrosion finish paint is alkyd finish paint, the temperature in the device is increased to 125-145 ℃, and the drying and curing time of the finish paint is 65-85 min.

Compared with the prior art, the invention has the beneficial effects that: the outer side of the steel bridge box-shaped super large pressure member is firmly provided with the stiffening structure by arranging the stiffening structure outside the steel bridge box-shaped super large pressure member, the stiffening structure is provided with a plurality of stiffening steel bars which can be directly communicated to the bottom of the steel bridge box-shaped super large pressure member, the steel bridge box-shaped super large pressure member can have good auxiliary supporting effect, the integral structural strength of the pressure member is improved to a certain extent, the pressure member is not easy to deform, the steel bridge box-shaped super large pressure member is designed into a sectional assembly type, when the steel bridge box-shaped super large pressure member is installed, each pressure member can be combined, and the combined pin shaft is arranged on the pressure member and can effectively position the combination of the pressure members, so that the conditions that the pressure members are installed and dislocated or the end faces cannot be aligned are avoided, the assembling accuracy of the pressure rod piece is improved.

Drawings

FIG. 1 is a front view of the present invention;

fig. 2 is a schematic structural view of the third steel bridge box-shaped pressure rod piece after being disassembled.

In the figure: 1. reinforcing steel bars; 2. a first steel bridge box pressure bar; 3. stiffening and installing an outer frame; 4. fixing screws; 5. a second steel bridge box-shaped pressure rod piece; 6. a third steel bridge box-shaped pressure rod piece; 61. positioning the combined pin shaft; 62. connecting reinforcing holes; 63. a pressure-bearing cross frame; 64. a pressure bearing middle rack; 65. The pressure bears the weight of the longitudinal frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.