A temporary support system for a road bridge pre-fabricated small box girder-type concealed bent cap, and a method of constructing same. The support system comprises a main beam, a main pier support system, and a lateral pier support system; the main beam is arranged on the transverse side of road bridge piers; the main pier support system is disposed on the transverse side of a main pier area and is located under the main beam; the lower end of the main pier support system is fixed to a main pier bearing platform, whereas the upper end is fixed to the main beam; the lateral pier support system is disposed on the transverse side of a lateral pier area and is located below the main beam; and the lower end of the lateral pier support system is fixed to a lateral pier bearing platform, whereas the upper end is fixed to the main beam.

A temporary support system for a road bridge pre-fabricated small box girder-type concealed bent cap, and a method of constructing same. The support system comprises a main beam, a main pier support system, and a lateral pier support system; the main beam is arranged on the transverse side of road bridge piers; the main pier support system is disposed on the transverse side of a main pier area and is located under the main beam; the lower end of the main pier support system is fixed to a main pier bearing platform, whereas the upper end is fixed to the main beam; the lateral pier support system is disposed on the transverse side of a lateral pier area and is located below the main beam; and the lower end of the lateral pier support system is fixed to a lateral pier bearing platform, whereas the upper end is fixed to the main beam.

An installation method of a bent cap for mutually restraining adjacent pier studs in a prefabricated and assembled bridge is provided. A bent cap mold base is configured in a form of a bent cap, which includes fixedly arranging limiting steel rings at two ends of a rectangular frame and vertically arranging steel bar sleeves in the limiting steel rings, hoisting the cap bent mold base on top portions of adjacent two prefabricated pier studs, such that pier stud pre-embedded steel bars protruding from the top portions of the two prefabricated pier studs are correspondingly inserted into the steel bar sleeves at two ends of the bent cap mold base one by one, and limiting the adjacent two prefabricated pier studs in the bent cap mold base.

An installation method of a bent cap for mutually restraining adjacent pier studs in a prefabricated and assembled bridge is provided. A bent cap mold base is configured in a form of a bent cap, which includes fixedly arranging limiting steel rings at two ends of a rectangular frame and vertically arranging steel bar sleeves in the limiting steel rings, hoisting the cap bent mold base on top portions of adjacent two prefabricated pier studs, such that pier stud pre-embedded steel bars protruding from the top portions of the two prefabricated pier studs are correspondingly inserted into the steel bar sleeves at two ends of the bent cap mold base one by one, and limiting the adjacent two prefabricated pier studs in the bent cap mold base.

The present disclosure discloses a mid-span axial force-free connecting device for an earth-anchored cable-stayed bridge and a method for mounting same. The mid-span axial force-free connecting device for an earth-anchored cable-stayed bridge includes an externally sleeved large steel box girder and an internally embedded small steel box girder. A plurality of bearing beams are arranged on the inner periphery of the externally sleeved large steel box girder. Transverse spherical bearings or vertical spherical bearings are arranged on the bearing beams. The internally embedded small steel box girder is fixedly supported in the externally sleeved large steel box girder through a plurality of transverse spherical bearings and vertical spherical bearings. In the same section, the transverse spherical bearings are symmetrically arranged, and the vertical spherical bearings are also symmetrically arranged.

The present disclosure discloses a mid-span axial force-free connecting device for an earth-anchored cable-stayed bridge and a method for mounting same. The mid-span axial force-free connecting device for an earth-anchored cable-stayed bridge includes an externally sleeved large steel box girder and an internally embedded small steel box girder. A plurality of bearing beams are arranged on the inner periphery of the externally sleeved large steel box girder. Transverse spherical bearings or vertical spherical bearings are arranged on the bearing beams. The internally embedded small steel box girder is fixedly supported in the externally sleeved large steel box girder through a plurality of transverse spherical bearings and vertical spherical bearings. In the same section, the transverse spherical bearings are symmetrically arranged, and the vertical spherical bearings are also symmetrically arranged.

Disclosed are a steel-concrete composite web and a construction method thereof, and relate to the field of bridge engineering. The steel-concrete composite web comprises a plurality of prefabricated web segments connected in sequence, wherein each prefabricated web segment comprises a corrugated steel web and a concrete encasement, each concrete encasement is arranged on the inner side of the corresponding corrugated steel web. The right and left edges of adjacent corrugated steel web segments are connected, and a pouring space is formed between adjacent concrete encasements; and each concrete encasement is provided with joint reinforcing rebars used for stretching into the pouring space, first concrete is poured into the pouring space to form a cast-in-place wet joint, and the joint reinforcing rebars are embedded into the cast-in-place wet joint.

An arch bridge system including first and second side walls, a foundation, and arch beams. The first and second side walls each include side wall sections supported by the foundation and aligned along the width of the system. Adjacent side wall sections form a column therebetween that defines an interior void extending along a height of the column. A first end of each arch beam is supported at the first side wall at an upper portion of one of the columns and a second end is supported at the second side wall at an upper portion of another one of the columns. Each interior void has reinforced concrete forming cast-in-place columns defining rigid, fixed, monolithic connections between the foundation, the first and second side walls, and the plurality of arch beams. A method of producing an arch bridge system is also disclosed.

An arch bridge system including first and second side walls, a foundation, and arch beams. The first and second side walls each include side wall sections supported by the foundation and aligned along the width of the system. Adjacent side wall sections form a column therebetween that defines an interior void extending along a height of the column. A first end of each arch beam is supported at the first side wall at an upper portion of one of the columns and a second end is supported at the second side wall at an upper portion of another one of the columns. Each interior void has reinforced concrete forming cast-in-place columns defining rigid, fixed, monolithic connections between the foundation, the first and second side walls, and the plurality of arch beams. A method of producing an arch bridge system is also disclosed.

Disclosed is a construction method for overhead jacking of a multi-track existing railway of a frame bridge. By means of construction modes of transition overhead construction-dewatering construction-formal overhead and two-end opposite jacking and middle cast-in-place, the risk caused by the groundwater level to a dig-hole pile is directly avoided. The overall construction scheme for the overpass pipe section follows the principle of segmented construction and line production, a jacking part of the overpass is firstly constructed, and after the jacking part is in place, a middle frame is cast in place, which guarantees not only the railway operation but also the construction period quality, and thus good economic benefits and construction guidance significance are achieved.