CN-121976455-A - Modular assembly type steel box installation structure and construction process

CN121976455ACN 121976455 ACN121976455 ACN 121976455ACN-121976455-A

Abstract

The application discloses a modular assembled steel box installation structure and a construction process, and particularly relates to the technical field of steel box installation, which comprises an embedded foundation, wherein a temporary support is fixedly connected to the top of the embedded foundation, a distribution beam is fixedly connected to the top of the temporary support, an adjusting mechanism is arranged at the top of the distribution beam, a backing beam is arranged at the top of the adjusting mechanism, a steel box beam is arranged at the top of the backing beam, the temporary support comprises steel pipe columns, connecting lug plates, stable connecting frames, butt joint clamping plates and bolt shafts, a plurality of groups of steel pipe columns are arranged, and connecting lug plates are arranged and welded on the surfaces of the steel pipe columns; the application locks the stable connecting frame through the pin shaft to form an integral supporting system, the pin connection avoids on-site welding, reduces construction difficulty, and the lattice frame provides high stability, is suitable for high-speed complex working conditions, can reduce material waste by repeatedly used components, and meets the requirements of green construction.

Inventors

WANG YEPENG
ZHANG MAOPENG
LI CHENGYUAN
WEI YUAN
HE LIANG
ZOU CHENGBIN
CHEN PEIJI
ZHOU XIONG

Assignees

中铁广州工程局集团有限公司
中铁广州工程局集团第三工程有限公司

Dates

Publication Date: 20260505
Application Date: 20251230

Claims (9)

1. The modularized assembled steel box installation structure comprises an embedded foundation (1) and is characterized in that a temporary support (2) is fixedly connected to the top of the embedded foundation (1), a distribution beam (3) is fixedly connected to the top of the temporary support (2), an adjusting mechanism (4) is arranged at the top of the distribution beam (3), a bolster (5) is arranged at the top of the adjusting mechanism (4), a steel box girder (6) is arranged at the top of the bolster (5), the temporary support (2) comprises a steel pipe column (201), a connecting lug plate (202), a stable connecting frame (203), a butt joint clamping plate (204) and a bolt shaft (205), multiple groups of steel pipe columns (201) are arranged, the surface of each steel pipe column (201) is provided with a connecting lug plate (202), the adjacent steel pipe columns (201) are provided with stable connecting frames (203), the end parts of the stable connecting frames (203) are fixedly welded with the butt joint clamping plates (204), the connecting lug plates (202) are matched with the butt joint clamping plates (204), and the connecting lug plates (204) are fixedly connected with the butt joint clamping plates (205) through the pin shafts (205).
2. The modular steel box mounting structure according to claim 1, wherein the adjusting mechanism (4) comprises a three-dimensional jack (401), a beam falling pier (402), a pressure sensor (403) and a displacement sensor (404), the bottom of the three-dimensional jack (401) is fixed at the top of the distribution beam (3), a top lifting head of the three-dimensional jack (401) indirectly supports the steel box beam (6) through the bolster (5), a beam falling pier (402) is arranged on one side of the three-dimensional jack (401), the beam falling pier (402) is formed by stacking multiple layers of modular steel cushion blocks, the pressure sensor (403) is integrated at an oil circuit system and the lifting head of the three-dimensional jack (401), and the displacement sensor (404) is arranged on a cylinder body of the three-dimensional jack (401).
3. A modular steel box installation structure according to claim 2, wherein a slide plate (501) is fixed on the top surface of the bolster (5), and the bottom of the steel box girder (6) is supported on the slide plate (501).
4. The modular assembled steel box installation structure of claim 3, wherein an auxiliary positioning assembly (7) is arranged on one side of the steel box girder (6), the auxiliary positioning assembly (7) comprises a male head (701), a female groove (702), an anti-falling elastic sheet (703) and a limiting groove (704), the male head (701) is vertically welded at the end part of one group of the steel box girders (6), a female groove (702) is formed in the end part of the adjacent steel box girder (6), the cross section of the male head (701) is T-shaped, the shape of the female groove (702) is matched with that of the male head (701), the anti-falling elastic sheet (703) is arranged on the surface of the male head (701), and the limiting groove (704) clamped with the anti-falling elastic sheet (703) is formed in the inner wall of the female groove (702).
5. A modular steel box mounting structure according to claim 3, wherein one side of the three-dimensional jack (401) is provided with an intelligent synchronous control mechanism (8), the inside of the intelligent synchronous control mechanism (8) comprises a central processing unit (801), a data acquisition module (802) and an actuator driving module (803), one side of the central processing unit (801) is provided with the data acquisition module (802), the data acquisition module (802) is in communication connection with the pressure sensor (403) and the displacement sensor (404), and one side of the data acquisition module (802) is provided with the actuator driving module (803).
6. The modular assembled steel box installation structure of claim 4, wherein longitudinal prestressed corrugated pipes (9) are pre-buried in the inner side of the steel box girder (6), reinforcing ribs (10) are fixedly connected to the inner wall of the steel box girder (6), the reinforcing ribs (10) are arranged in an orthogonal net shape in the steel box girder (6), and fiber grating sensors are arranged in the longitudinal prestressed corrugated pipes (9) in a penetrating mode.
7. A construction process of a modular assembled steel box installation structure, which is applied to the modular assembled steel box installation structure as claimed in any one of claims 1 to 6, and is characterized in that the construction process comprises the following steps: firstly, preparing construction, treating a construction site, positioning and constructing the pre-buried foundation (1), pre-burying an anchor at the top of the foundation, accurately measuring the plane position and elevation of the temporary support (2) by adopting a total station, and describing a mounting datum line; Installing a temporary support (2), hoisting a standardized steel pipe column (201) to an embedded foundation (1) by adopting an automobile crane, quickly connecting a stable connecting frame (203) through a pin (205) to form a lattice type supporting frame, and then hoisting a distribution beam (3) to the top of the support and fixing; Step three, integrating and debugging a pushing system, installing a three-dimensional jack (401) and an adjacent girder falling pier (402) on a distribution girder (3), arranging measuring points of a pressure sensor (403) and a displacement sensor (404), connecting a circuit of an intelligent synchronous control mechanism (8) with a hydraulic pipeline, performing no-load test operation of the system, and checking the accuracy of sensor data and actuator actions; step four, assembling and connecting the sections of the steel box girder (6), hoisting the steel box girder (6) to a sliding plate (501) of the backing girder (5) by adopting an automobile crane section, performing preliminary positioning by using the clamping fit of a male head (701) and a female groove (702) of an auxiliary positioning assembly (7), then welding annular seams among the sections, and synchronously penetrating a fiber bragg grating sensor in a longitudinal prestress corrugated pipe (9); The intelligent pushing and synchronous control is carried out, an intelligent synchronous control mechanism (8) is started, the steel box girder (6) is pushed according to the jacking, flat pushing, descending and retracting cycles, a central processing unit (801) monitors the load and displacement of each jack in real time through a data acquisition module (802), hydraulic flow is dynamically adjusted through an actuator driving module (803), in a curve pushing section, the axial deviation of the steel box girder (6) is monitored through a total station, and when the deviation is larger than a set value, an intelligent system automatically activates the transverse deviation rectifying function of the three-dimensional jack (401) and combines the guiding function of a sliding plate (501) to carry out dynamic deviation rectifying; Step six, after the temporary structure is removed and pushed into place, the steel box girder (6) is jacked by the three-dimensional jack (401), the modularized steel cushion blocks are replaced step by step on the girder falling piers (402), finally, the girder body load is transferred to the permanent support, and the bolster (5), the three-dimensional jack (401), the distribution girder (3) and the temporary support (2) are removed in reverse order, so that the modularized components are recovered.
8. The construction process of the modular steel box installation structure of claim 7, wherein in the fifth step, the pushing circulation specifically comprises synchronous lifting, controlling the lifting cylinders of all three-dimensional jacks (401) to synchronously act, lifting the steel box girder (6) away from the girder falling pier (402), then controlling the horizontal pushing cylinder stroke to push the steel box girder (6) to slide along the sliding plate (501) and synchronously descend, controlling the lifting cylinders to descend, enabling the steel box girder (6) to accurately fall on a steel cushion block of the girder falling pier (402), hydraulically retracting, and enabling the horizontal pushing cylinder to fully retract to an initial position and prepare for the next circulation.
9. The construction process of the modular assembled steel box installation structure of claim 8, wherein in the fifth step, when the intelligent synchronous control mechanism (8) detects that the accumulated displacement error of the adjacent pushing points is larger than a safety value in the horizontal pushing process, the pushing is immediately suspended, the manual mode is switched to, the three-dimensional jack (401) for independently controlling the hysteresis points is used for inching correction, meanwhile, the change of the stress of the key section of the steel box girder (6) is rechecked based on the monitoring data of the fiber grating sensor, and the automatic pushing can be recovered after safety is confirmed.

Description

Modular assembly type steel box installation structure and construction process Technical Field The application relates to the technical field of steel box installation, in particular to a modular assembly type steel box installation structure and a construction process. Background The steel box girder bridge is widely applied to modern urban overpasses, overpasses and large transportation hubs due to the advantages of light structure, large spanning capacity, high construction efficiency and the like; According to the prior patent publication No. CN120844449A, a modular assembled steel box girder connecting system and a construction method are disclosed, the modular assembled steel box girder connecting system comprises a steel box girder, a girder embedded constraint steel end plate, a side constraint ring sealing plate, a constraint cover plate, a central sealing steel plate and a central sealing steel plate, wherein the embedded part is embedded from the connecting end of the steel box girder, the annular wing plate is positioned outside the steel box girder, the side constraint ring sealing plate seals a girder end installation gap on the front side and the rear side and constrains two annular wing plates on the same side, the constraint cover plate seals a girder end installation gap on the upper side and the lower side and constrains the two annular wing plates on the same side, the side constraint ring sealing plate and the constraint cover plate are connected through mortise and tenon, and the central sealing steel plate seals the central installation gap. The application relates to a modular assembled steel box girder connecting system, which is all assembled and connected without welding operation, and the inner side and the outer side of a steel box girder are provided with constraint components, so that the constraint components act together under the action of external force, and the butt joint connection end parts of the constraint box girders are not subjected to relative displacement and rotation angle, thereby achieving effective butt joint fixation of the box girders. The inventors found that the following problems exist in the prior art in the process of implementing the present application: The traditional steel box mounted pushing temporary buttresses are mostly formed by one-time design and field welding, lack of modularized and assembled structures, are easy to cause that different projects cannot be recycled, waste of materials is easy to cause, the field welding workload is large, the quality is not easy to ensure, the pushing process, especially when small-radius curves are pushed, axial displacement of Liang Tiji is easy to occur, the traditional method mainly relies on manual measurement and experience to correct the deviation, and the accuracy is difficult to ensure; therefore, a modular assembly type steel box installation structure and a construction process are provided for the problems. Disclosure of Invention In order to overcome the defects in the prior art, the application provides a modular assembly type steel box installation structure and a construction process, which are used for solving the problems in the prior art. The modular assembled steel box installation structure comprises an embedded foundation, wherein a temporary support is fixedly connected to the top of the embedded foundation, a distribution beam is fixedly connected to the top of the temporary support, an adjusting mechanism is arranged at the top of the distribution beam, a backing beam is arranged at the top of the adjusting mechanism, a steel box beam is arranged at the top of the backing beam, the temporary support comprises steel pipe columns, connecting lug plates, stable connecting frames, butt joint clamping plates and bolt shafts, a plurality of groups of steel pipe columns are arranged, connecting lug plates are welded on the surfaces of the steel pipe columns in an arrayed mode, the stable connecting frames are arranged between every two adjacent steel pipe columns, butt joint clamping plates are fixedly welded at the ends of the stable connecting frames, the connecting lug plates are matched with the butt joint clamping plates, and the connecting lug plates are fixedly connected with the butt joint clamping plates through the bolt shafts. Preferably, the adjustment mechanism comprises a three-dimensional jack, a beam falling pier, a pressure sensor and a displacement sensor, wherein the bottom of the three-dimensional jack is fixed at the top of the distribution beam, a top lifting head of the three-dimensional jack indirectly supports the steel box beam through the backing beam, the beam falling pier is arranged on one side of the three-dimensional jack and is formed by stacking a plurality of layers of modularized steel cushion blocks, the pressure sensor is integrated at an oil circuit system and a lifting head of the three-dimensional jack, and the displacement sensor is arranged on a