CN-121973333-A - Special-shaped steel reinforced concrete beam mold for assembled subway station and construction method

CN121973333ACN 121973333 ACN121973333 ACN 121973333ACN-121973333-A

Abstract

The invention discloses a special-shaped steel reinforced concrete beam mould for an assembled subway station and a construction method, and the special-shaped steel reinforced concrete beam mould comprises a modularized curved surface combination mechanism, a steel bar positioning guide and reserved hole integrated structure, a vacuum auxiliary vibrating compaction system and a mould rigidity self-adaptive adjusting device, wherein the modularized curved surface combination mechanism is used for realizing accurate forming and efficient disassembly and assembly of special-shaped curved surfaces with different curvatures, the steel bar positioning guide and reserved hole integrated structure is used for realizing accurate positioning of multi-directional steel bars and reserved hole anti-seepage, the vacuum auxiliary vibrating compaction system is used for improving concrete pouring compactness, and the mould rigidity self-adaptive adjusting device is used for dynamically compensating deformation in the mould pouring process and guaranteeing geometric dimension precision of components. The device controls the deformation of the mould through strain monitoring and dynamic compensation of the hydraulic stay bars, and adopts the flow of step pouring, gradient vibration and dynamic maintenance to realize the production with high precision, high efficiency and high quality of the components, and the mould multiplexing rate is high, so as to adapt to the construction requirements of the assembled subway station.

Inventors

LIU YANG
CAO TAIBO
CHEN SI
DENG LILAN
YANG XIAO
YU JIANPING
Mai Ergang
QIN SHIZHEN
ZHANG JIAN
LIU JINHUI
SUN CHONG
XIAO LIANGCAI
RAO WEI
LIU YONGQI
Jian Jinchang
LI WEI
FAN ZHIMING
HUANG ZHITANG
MENG FANGUANG
ZHAO QI
ZHANG BO
HUANG HOU

Assignees

中建一局集团华南建设有限公司
中国建筑一局(集团)有限公司

Dates

Publication Date: 20260505
Application Date: 20260119

Claims (10)

1. The special-shaped steel reinforced concrete beam die for the assembled subway station is characterized by comprising a modularized curved surface combination mechanism (1), a steel bar positioning, guiding and preformed hole integrated structure (2), a vacuum auxiliary vibrating compaction system (3) and a die rigidity self-adaptive adjusting device (4); The modularized curved surface combination mechanism (1) is used for realizing the forming and the disassembly of special-shaped curved surfaces with different curvatures, the steel bar positioning guide and preformed hole integrated structure (2) is used for realizing the positioning of multidirectional steel bars and the anti-leakage of preformed holes, the vacuum auxiliary vibrating compacting system (3) is used for improving the concrete pouring compactness, and the die rigidity self-adaptive adjusting device (4) is used for dynamically compensating the deformation in the die pouring process and guaranteeing the geometric dimension precision of components.
2. The special-shaped steel reinforced concrete beam mold for the assembled subway station according to claim 1, wherein the modularized curved surface combination mechanism (1) comprises a plurality of independent modularized curved surface units (10), each modularized curved surface unit (10) comprises an arc-shaped steel plate, a reinforcing rib (11) with an adjustable radian is welded on the back surface of each arc-shaped steel plate, adjusting bolts are arranged at two ends of each reinforcing rib (11), and the curvatures of the arc-shaped steel plates can be adjusted through the adjusting bolts so as to adapt to special-shaped beam requirements with different curvatures.
3. The special-shaped steel reinforced concrete beam mold for the assembled subway station according to claim 1, wherein a mortise and tenon joint structure (12) is processed on the splicing surface of each modularized curved surface unit (10), and a rubber sealing gasket is arranged at the mortise and tenon joint position; quick locking mechanisms (13) are arranged on two sides of the modularized curved surface units (10), the single modularized curved surface unit (10) can be quickly locked or unlocked through the quick locking mechanisms (13), and a plurality of modularized curved surface units (10) are spliced with the quick locking mechanisms (13) through mortise and tenon structures (12) to form a complete special-shaped curved surface.
4. A profiled steel reinforced concrete beam mould for an assembled subway station according to any one of claims 1 to 3, characterized in that the steel bar positioning guide and preformed hole integrated structure (2) comprises a slidable steel bar positioning guide groove (20) arranged on the inner wall of each modularized curved surface unit (10), the bottom of the steel bar positioning guide groove (20) is connected with a linear slide rail, and a positioning bolt is arranged on the linear slide rail, and the transverse position of the steel bar positioning guide groove (20) can be adjusted through the positioning bolt; The side of the steel bar positioning guide groove (20) is provided with an angle adjusting knob, and the included angle between the steel bar positioning guide groove (20) and the inner wall of the die can be adjusted through the angle adjusting knob.
5. The special-shaped steel reinforced concrete beam mold for the assembled subway station according to claim 4, wherein the tail end of the steel bar positioning guide groove (20) is integrally connected with a preformed hole assembly (23), the preformed hole assembly (23) comprises a steel sleeve and a sealing ring (231), the sealing ring (231) is fixed on the inner side of the steel sleeve through a pressing ring, and the sealing ring (231) can be tightly attached to the surface of a steel bar penetrating through the steel sleeve to prevent leakage during concrete pouring.
6. The profiled steel reinforced concrete beam die for the assembled subway station as claimed in claim 5, wherein the vacuum-assisted vibrating compaction system (3) comprises a closed surrounding vacuum cavity (30), the surrounding vacuum cavity (30) is arranged outside the die, a ventilated membrane is adhered to the inner wall of the surrounding vacuum cavity (30), the surrounding vacuum cavity (30) is connected with a vacuum pump through a vacuum tube, and a negative pressure environment can be formed on the contact surface of the die and concrete through the vacuum pump.
7. The profiled steel reinforced concrete beam die for the assembled subway station according to claim 5, wherein the vacuum-assisted vibrating compaction system (3) further comprises telescopic high-frequency vibrating bars (31), the telescopic high-frequency vibrating bars (31) are arranged at intervals along the curved surface radian direction of the modularized curved surface unit (10), the telescopic high-frequency vibrating bars (31) are connected with hydraulic push rods (32), the telescopic high-frequency vibrating bars (31) can be controlled to stretch to cover the curved surface blind area through the hydraulic push rods (32), the telescopic high-frequency vibrating bars (31) are linked with a vacuum pump through a controller, when the vacuum pump reaches the preset pressure, the telescopic high-frequency vibrating bars (31) are automatically started, and the vibrating time is adaptively adjusted according to the concrete slump.
8. The special-shaped steel reinforced concrete beam mold for the assembled subway station according to claim 5, wherein the mold stiffness self-adaptive adjusting device (4) comprises a strain monitoring unit and a hydraulic stay bar (41), the strain monitoring unit is arranged at a stress part of a mold frame, the stress part comprises a splicing part of a modularized curved surface unit (10) and a mold supporting point, and the strain monitoring unit is used for collecting strain data in the mold pouring process and converting the strain data into deformation and feeding the deformation back to a control system; The hydraulic support rods (41) are arranged in one-to-one correspondence with the strain monitoring units, the hydraulic support rods (41) are connected with the hydraulic station through reversing valves, and the control system adjusts the supporting force of the hydraulic support rods (41) according to deformation data so as to compensate the deformation of the die.
9. A construction method of a profiled steel reinforced concrete beam for an assembled subway station, characterized in that the construction is performed by using the die set according to any one of claims 1 to 8, comprising the following steps: The method comprises the steps of S1, assembling and debugging a mold, namely adjusting the curvature of an arc-shaped steel plate of each modularized curved surface unit (10) according to curved surface design parameters of a special-shaped steel reinforced concrete beam, completing splicing through a mortise-tenon structure (12) and a quick locking mechanism (13), detecting the forming precision of the curved surface, adjusting the position and angle of a steel bar positioning guide groove (20) according to steel bar arrangement parameters, testing the tightness of a surrounding type vacuum cavity (30) and the stretching and vibrating functions of a telescopic high-frequency vibrating rod (31), calibrating a strain monitoring unit and a hydraulic support rod (41) adjusting unit, and setting a mold deformation early warning value and a control value; S2, installing the steel bars and the section steel, namely hoisting the prefabricated section steel beam to a section steel supporting seat in a die, fixing a connecting node of the section steel and the die after positioning, binding the steel bars of the beam body, enabling the steel bars to be stretched out to pass through a steel bar positioning guide groove (20) and a reserved hole assembly (23), and checking the distance between the steel bars and stretching out deviation; s3, step-by-step pouring and vacuum vibrating, namely, firstly pouring to cover a curved surface transition area of the beam body, starting a vacuum pump and a telescopic high-frequency vibrating rod (31) in a corresponding area in the pouring process, finishing pouring of the upper structure of the beam body before initial setting of bottom concrete, dynamically adjusting the vibrating frequency of the telescopic high-frequency vibrating rod (31) according to the slump of the concrete in the pouring process, leveling the surface of the beam body after pouring to a designed elevation, and keeping a vacuum state; S4, dynamic temperature maintenance, namely starting a circulating water heating pipe arranged in the mold, monitoring the temperature of circulating water in real time through a temperature sensor, adjusting the water temperature in stages according to a concrete strength growth curve, and periodically detecting the surface strength of the concrete during maintenance; And S5, after the die is removed and the components are checked, closing the die rigidity self-adaptive adjusting device (4), unlocking the quick locking mechanism (13), removing the modularized curved surface unit (10) according to the reverse sequence of assembly, detecting the curved surface forming precision, the steel bar stretching position deviation, the concrete compactness and the surface quality of the components, and transferring and storing the components after the components are checked and accepted.
10. The construction method of the profiled steel concrete beam for the fabricated subway station according to claim 1, wherein the dynamic temperature maintenance in the step S4 comprises three stages of keeping the surface humidity of the concrete in a preset high humidity range in an initial stage after casting, keeping the water temperature in a normal temperature range, increasing the water temperature in a middle stage to accelerate the increase of the strength of the concrete, gradually reducing the water temperature to the ambient temperature in a later stage, controlling the cooling rate in the cooling process, and stopping the maintenance when the early strength of the concrete reaches a preset proportion of a design value.

Description

Special-shaped steel reinforced concrete beam mold for assembled subway station and construction method Technical Field The invention relates to the technical field of construction of assembled subway stations, in particular to a special-shaped steel reinforced concrete beam die for an assembled subway station and a construction method. Background In the construction of the assembled subway station, the special-shaped steel reinforced concrete beam can adapt to the stress requirement of complex space due to the high strength of the steel section and the high rigidity of the concrete, and is widely applied to key parts such as station nodes, transfer channels and the like. However, the member has the characteristics of complex multi-curved surface modeling, dense arrangement of reinforcing steel bars, various extending directions, high requirement on concrete pouring compactness, easy deformation of a die, and the like, and the existing die and construction technology have obvious defects, so that the engineering quality and efficiency are severely restricted: (1) The traditional die is mainly of an integral welding rigid structure, the multi-curved surface modeling of the special-shaped beam is required to be customized and processed, a single die can only be adapted to a component with one curvature, when the parameters of the curved surface of the component are changed, the component is required to be manufactured again, the multiplexing rate of the die is low (less than 30 percent); (2) The steel bar positioning and the quality of the reserved holes are difficult to control, namely the special-shaped steel reinforced concrete beam has the requirement of multi-directional steel bar extension, the traditional mould relies on manual scribing positioning, the deviation of the extension position of the steel bar is often more than +/-8 mm, and the steel bar can not be butted when being assembled on site easily; (3) The compactness of the concrete is insufficient, namely the complicated curved surface part has more vibrating blind areas, the traditional inserted vibrating rod is difficult to cover all areas, air bubbles and holes are easily generated in the concrete (the compactness is often lower than 95 percent) to influence the bearing capacity of the component, and the high-frequency attached vibrator is adopted for part of construction, so that the vibrating effect can be improved, but the local resonance deformation of a mould is easily caused, and the forming quality is further reduced; (4) The rigidity stability of the mould is poor, in the concrete pouring process, the mould is easy to deform under the actions of lateral pressure, vibrating load and the like, and the traditional mould increases the rigidity by increasing the thickness of the steel plate, so that the dead weight of the mould is increased (more than 5 t/sleeve), the carrying is inconvenient, the rigidity cannot be dynamically adjusted according to the real-time load, the maximum deformation amount is often more than 8mm, and the maximum deformation amount exceeds the standard allowable range (less than or equal to 5 mm), thereby influencing the geometric dimension precision of the component; (5) The construction process has low efficiency and poor maintenance effect, the traditional construction adopts a mode of 'one-time pouring and later-period static maintenance', the one-time pouring is easy to cause concentration of temperature stress in the girder body and generate shrinkage cracks, the static maintenance depends on manual temperature and humidity control, the maintenance condition is unstable, the early strength of the component is slowly increased (the 7d strength only reaches 60% of a design value), the whole construction period is long, and the rapid construction requirement of the assembly type engineering is difficult to meet. Therefore, there is a need for an assembly type special-shaped steel reinforced concrete beam mold for subway stations and a construction method thereof, wherein the special-shaped steel reinforced concrete beam mold can realize multi-curved-surface precise molding, high-efficiency positioning of reinforcing steel bars, improvement of concrete compactness, self-adaptive stability of mold rigidity and optimization of construction flow. Disclosure of Invention In order to solve the technical problems, the invention provides a special-shaped steel reinforced concrete beam die for an assembled subway station and a construction method. The technical scheme for solving the technical problems is that the special-shaped steel reinforced concrete beam die for the assembled subway station comprises a modularized curved surface combination mechanism, a steel bar positioning guide and preformed hole integrated structure, a vacuum auxiliary vibrating compaction system and a die rigidity self-adaptive adjusting device; The modularized curved surface combination mechanism is used for realizing accurate forming and ef