A post-tensioned prestressed hollow slab structure capable of withstanding horizontal and eccentric loads

Abstract

A post-tensioned prestressed hollow slab structure capable of withstanding horizontal and eccentric loads, characterized in that it comprises a cast-in-place crossbeam, side plates, process equipment, a cable trench and a middle plate, wherein the cast-in-place crossbeam is provided with side plates, process equipment is provided on the side plates, a cable trench is provided on the side plates, and a middle plate is provided between the side plates, the side plates are in an inverted "sun" shape, the middle plates are in a "mouth" shape, and the middle plates have a plurality of pieces; the overall stability of the bridge is increased, the side plates of the structure are post-tensioned prestressed hollow slab structures in an inverted "sun" shape, can withstand larger horizontal and eccentric loads, increase the overall stability of the bridge, can be widely used in the sewage net retracting and releasing platform in the open water intake channel of a power plant, meet the use requirements of salvage operations, and the structure matches the commonly used standard span hollow slab parameters and can be widely used in conventional bridge projects.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge side plates bearing horizontal and eccentric loads, in particular to a post-tensioned prestressed hollow plate structure capable of bearing horizontal and eccentric loads. Background Art

[0002] In recent years, my country's nuclear power plants and thermal power plants have reported a number of operational incidents caused by marine organisms or marine debris blocking the water intake system, and the number of related abnormal reports has been increasing. Doing a good job in the front-end protection of the water intake channel is the top priority of cold source protection. In order to meet the needs of operation and maintenance personnel to inspect and salvage waste, many power plants have installed a trash net retracting and releasing platform in the open water intake channel. The main body of the retracting and releasing platform adopts a bridge structure. In order to meet the needs of the operation and maintenance of the trash net, a variety of process equipment is installed at the side plate position, which generates large horizontal and eccentric loads. The conventional side plate structure cannot meet the use requirements of the salvage operation. In order to solve the above problems, a post-tensioned prestressed hollow plate structure that can withstand horizontal and eccentric loads is proposed. Utility Model Content

[0003] According to the above existing technical problems, the utility model provides a post-tensioned prestressed hollow slab structure that can withstand horizontal and eccentric loads, characterized in that it includes a cast-in-place crossbeam, a side plate, a process equipment, a cable trench, and a middle plate. The cast-in-place crossbeam is provided with a side plate, the process equipment is provided with the side plate, the cable trench is provided with the side plate, and the middle plate is provided between the side plates. The side plate is in an inverted "sun" shape, the middle plate is in a "mouth" shape, and the middle plate has a plurality of pieces;

[0004] Furthermore, the side plates are two in number, which are respectively fixed to the two sides of the cast-in-place beam by bolts, the middle plate is located between the two side plates and connected to the cast-in-place beam by bolts, and the cables of the process equipment pass through the cable trench;

[0005] Furthermore, the side plates adopt a post-tensioned prestressed hollow plate structure, and the middle plate adopts a post-tensioned prestressed hollow plate structure.

[0006] Beneficial effects of the utility model:

[0007] The utility model increases the overall stability of the bridge. The side plates of the structure are post-tensioned prestressed hollow plate structures, which are in the shape of an inverted "sun", can withstand larger horizontal loads and eccentric loads, increase the overall stability of the bridge, and can be widely used in the sewage net retracting and releasing platform in the open water intake channel of power plants to meet the use requirements of salvage operations. The structure matches the commonly used standard span hollow plate parameters and can be widely used in conventional bridge projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1This is a schematic diagram of the overall structure of a post-tensioned prestressed hollow slab structure that can withstand horizontal and eccentric loads according to the utility model;

[0009] Figure 2 It is a structural schematic diagram of the side plate of the utility model;

[0010] Figure 3 It is a structural schematic diagram of the middle plate of the utility model;

[0011] Figure 4 It is a cross-sectional schematic diagram of the side plate of the utility model;

[0012] Figure 5 It is a cross-sectional schematic diagram of the middle plate of the utility model;

[0013] As shown in the figure: 1 cast-in-place beam, 2 side plates, 3 process equipment, 4 cable trench, 5 middle plate. DETAILED DESCRIPTION

[0014] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Example 1

[0018] The utility model provides a post-tensioned prestressed hollow slab structure capable of bearing horizontal and eccentric loads, characterized in that it comprises a cast-in-place crossbeam 1, a side plate 2, a process equipment 3, a cable trench 4, and a middle plate 5. The cast-in-place crossbeam 1 is provided with the side plate 2, the process equipment 3 is provided with the side plate 2, the cable trench 4 is provided with the side plate 2, and the middle plate 5 is provided between the side plates 2. The side plates 2 are in an inverted "sun" shape, the middle plate 5 is in a "mouth" shape, and the middle plate 5 has a plurality of pieces.

[0019] Furthermore, there are two side plates 2, which are fixed to the two sides of the cast-in-place beam 1 by bolts, and the middle plate 5 is located between the two side plates 2 and connected to the cast-in-place beam 1 by bolts. The cables of the process equipment 3 pass through the cable trench 4;

[0020] Furthermore, the side plate 2 adopts a post-tensioned prestressed hollow plate structure, and the middle plate 5 adopts a post-tensioned prestressed hollow plate structure.

[0021] Example 2

[0022] The main construction processes and methods are as follows:

[0023] (1) Hollow core slab prefabrication

[0024] The concrete pouring of the hollow slab should be poured continuously and formed in one time. The total pouring time of each precast slab should not exceed 6 hours. After the concrete of the slab is vibrated and poured, the top of the beam should be smoothed, and the slurry should be collected for the second time before the initial setting, and finally the roughening should be carried out.

[0025] (2) Prestressing process

[0026] 1) The position of the prestressed pipe must be strictly located according to the coordinates and fixed with positioning steel bars. The positioning steel bars are spot welded to the hollow slab web stirrups to prevent dislocation and pipe sagging;

[0027] 2) Prestressed steel strands can only be tensioned when the concrete strength and elastic modulus of the hollow slab reach 85% of the design strength and the concrete age is not less than 7 days;

[0028] 3) Prestressing should be done by controlling both the tension and the elongation;

[0029] 4) The tensioning sequence of the main beam positive bending moment steel tendons is N2→N1;

[0030] (3) Hollow slab installation

[0031] The construction process of hollow slab is as follows: set up permanent supports and install them hole by hole - connect the continuous steel bars of the bridge deck, cast the integral cast-in-place layer concrete together with the hinged joint concrete - construct guardrails - spray waterproof layer, carry out bridge deck paving construction and install expansion joints.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A post-tensioned prestressed hollow slab structure capable of withstanding horizontal and eccentric loads, characterized in that It includes cast-in-place beams, side plates, process equipment, cable trenches and middle plates. The cast-in-place beams are provided with side plates, process equipment is provided on the side plates, cable trenches are provided on the side plates, middle plates are provided between the side plates, the side plates are in an inverted "sun" shape, the middle plates are in a "mouth" shape, and there are several middle plates.

2. A post-tensioned prestressed hollow slab structure capable of withstanding horizontal and eccentric loads according to claim 1, characterized in that: There are two side plates, which are fixed to the two side edges of the cast-in-place beam by bolts respectively. The middle plate is located between the two side plates and connected to the cast-in-place beam by bolts. The cables of the process equipment pass through the cable trench.

3. A post-tensioned prestressed hollow slab structure capable of withstanding horizontal and eccentric loads according to claim 2, characterized in that: The side plates adopt a post-tensioned prestressed hollow plate structure, and the middle plate adopts a post-tensioned prestressed hollow plate structure.

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