Containment structure local test component and construction method thereof

Abstract

The application discloses a kind of containment structure local test components and its construction method, including concrete slab, steel lining plate, peg, intelligent prestressed steel strand;The intelligent prestressed steel strand passes through the concrete slab;Intelligent prestressed steel strand built-in FRP intelligent sensor, the steel lining plate is tightly attached to the inside of the concrete slab, is fixed by the peg;The peg is welded with the steel lining plate;The component of the application can monitor and transmit the pressure and its stress variation that component bears in real time, facilitate control component test prestressed tension and real-time monitoring of prestressed level in test;Steel lining plate is fixedly connected with concrete slab in component, during the process of containment strength test, the overall performance of containment can be effectively reacted to the greatest extent;The application is local test component structure with low cost, test data is accurate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nuclear power plant containment test, and particularly relates to a prestressed containment local test component based on intelligent steel strand and a construction method thereof. BACKGROUND

[0002] The nuclear power plant containment is the last physical barrier of the nuclear power station, and is crucial to the safety of nuclear power. In order to explore the performance of the nuclear power containment structure, such as strength, sealing, pressure bearing and impact resistance, a large number of test researches need to be carried out on the nuclear power containment. The prestressed containment structure is a prestressed reinforced concrete structure (including concrete, steel bars and prestressed steel strands), and the inner side is provided with a steel liner (including a liner plate and an anchor bolt) for preventing leakage. The structure is very complex. In the related test research, the whole model is mostly used for the containment test model, and the test cost is high. Compared with the civil prestressed structure, the containment structure is complex in structure and special in material. The scaled model is an important and difficult link in the containment test in reflecting the performance of the prototype structure, especially the scaled design of the liner plate and the anchor bolt of the liner system. In the current containment local test, especially the scaled test, the liner plate and the anchor bolt are mostly not considered, and the overall performance of the prestressed reinforced concrete containment cannot be reflected. The prestressed tension control process of the local component is not clear, the tension process is uncontrollable, and the prestressed level of the concrete after tensioning cannot be accurately determined. SUMMARY

[0003] In view of the above technical problems existing in the prior art, the purpose of the present application is to provide a prestressed containment structure local test component based on intelligent steel strand and a construction method thereof, which can solve the problems of test design difficulty and prestressed control difficulty in the containment local test component, and can be used to guide the safety containment test design personnel to carry out the safety containment test related research work.

[0004] To achieve the above-mentioned purpose of the application, the technical scheme adopted by the present application is as follows: a containment structure local test component, comprising a concrete plate, a steel liner plate, an anchor bolt, and an intelligent prestressed steel strand; the intelligent prestressed steel strand passes through the concrete plate; the intelligent prestressed steel strand is provided with a sensor; the steel liner plate is tightly attached to the inner side of the concrete plate and is fixed by the anchor bolt; and the anchor bolt is welded with the steel liner plate.

[0005] Further, a steel backing plate is further included, which is located around the concrete plate and fixes the intelligent prestressed steel strand.

[0006] Further, a prestressed steel strand is further included, which passes through the concrete plate.

[0007] Further, a steel mesh is further included, which is located inside the concrete slab; the prestressed steel strand and the prestressed steel beam pass through the steel mesh.

[0008] Further, a prestressed anchor is further included, which is located on the steel backing plate and corresponds to the intelligent prestressed steel strand and the prestressed steel beam, and fixes the intelligent prestressed steel strand and the prestressed steel beam.

[0009] The application further provides a construction method of a containment structure local test component, which comprises the following steps:

[0010] (1) welding the studs to the steel lining plate by welding, and placing the steel lining plate at the bottom as a support mold for concrete pouring;

[0011] (2) placing a concrete pouring formwork along the direction of the studs of the steel lining plate;

[0012] (3) binding the horizontal and vertical reinforcement mesh and placing it into the concrete pouring formwork and penetrating the prestressed duct;

[0013] (4) pouring concrete and vibrating to make the concrete uniformly distributed;

[0014] (5) after the curing is completed, tightly placing the steel lining plate against the inner side of the concrete slab and fixing it to the concrete slab by the studs;

[0015] (6) penetrating the prestressed steel beam and the intelligent prestressed steel strand through the prestressed duct, fixing one side to the steel backing plate by the clamping piece and fixing the other side to the steel backing plate by the prestressed anchor.

[0016] Further, in the step (3), the prestressed duct penetrates the steel reinforcement mesh; the steel reinforcement mesh is formed by the horizontal and vertical reinforcement mesh and the tension bar.

[0017] Further, in the step (3), the prestressed steel beam and the intelligent prestressed steel strand are symmetrically arranged in the concrete slab.

[0018] The beneficial effects brought by the technical scheme of the application are that the containment structure local test component comprises a concrete slab, a steel lining slab, a bolt, and an intelligent prestressed steel strand; the intelligent prestressed steel strand passes through the concrete slab; the intelligent prestressed steel strand is internally provided with a sensor, which can monitor and transmit the pressure and stress change of the component in real time, so as to facilitate the control of the prestressed tension during the component test and the real-time monitoring of the prestressed level during the test; the steel lining slab is tightly attached to the inner side of the concrete slab and is fixed through the bolt; the bolt is welded with the steel lining slab; the component of the application fixes and connects the steel lining slab and the concrete slab, and can effectively reflect the overall performance of the containment structure to the maximum extent during the containment strength test; the local test component of the application is simple in structure, is not limited in shape, and can be a plane slab, a cylindrical slab or a spherical slab, and can be applied to the test of the prestressed containment static force and dynamic impact performance of a nuclear power plant; the cost is low, and the stress change during the test can be monitored in real time. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a component diagram of the containment structure local test component of the embodiment of the application;

[0020] Figure 2 is a design sectional view of the containment structure local test component of the embodiment of the application;

[0021] Figure 3 is a design plan view of the containment structure local test component of the embodiment of the application;

[0022] Figure 4 is a distribution schematic diagram of the intelligent prestressed steel strand of the containment structure local test component of the embodiment of the application;

[0023] Figure 5 is a tension control curve of the intelligent prestressed steel strand of the containment structure local test component of the embodiment of the application.

[0024] Among them, the concrete slab 1, the steel lining slab 2, the bolt 3, the intelligent prestressed steel strand 4, the steel pad 5, the prestressed steel beam 6, the steel mesh 7, the horizontal and vertical mesh sheet 71, the tensioning rib 72, and the prestressed anchorage device 8. DETAILED DESCRIPTION

[0025] The application will be described in detail below in combination with the drawings and embodiments.

[0026] Referring to the drawings Figure 1 , 2, 3, a containment structure local test component, comprising a concrete slab 1, a steel lining plate 2, a peg 3, an intelligent prestressed steel strand 4;The intelligent prestressed steel strand 4 passes through the concrete slab 1;The intelligent prestressed steel strand 4 is built-in intelligent sensor;The steel lining plate 2 is closely attached to the inner side of the concrete slab 1, and is fixed by the peg 3;The peg 3 is bonded with the steel lining plate 2.The built-in FRP intelligent sensor of the intelligent prestressed steel strand 4 can monitor the pressure received by the transmission component during the test process and the stress change of itself in real time, can adjust the pressure in the test component process in real time, well control the prestress, improve the safety of the component test process;The steel lining plate 2 is arranged in the test component, which greatly restores the structure of the safety shell, and relatively accurate safety shell performance reference data can be obtained;And the safety shell local test component structure of the embodiment of the application is accurate and low in cost, and the prestress change can be effectively controlled.

[0027] Preferably, it also includes a steel backing plate 5, which is located around the concrete slab 1, fixes the intelligent prestressed steel strand 4, so that the prestress of the prestressed component is uniformly stressed

[0028] Preferably, it also includes a prestressed steel beam 6, which passes through the concrete slab 1 through a prestressed hole.

[0029] Preferably, it also includes a steel mesh 7, which is located inside the concrete slab 1 and is combined with the concrete by concrete pouring;The prestressed steel strand 4 and the prestressed steel beam 6 pass through the steel mesh 7.

[0030] Preferably, the steel mesh 7 is formed by inner and outer horizontal and vertical mesh sheets 71 and drawbars 72, wherein the horizontal and vertical mesh sheets can be placed in multiple layers according to needs, and the embodiment of the application is provided with two layers of steel mesh sheets, and the drawbars 72 are connected with the horizontal and vertical mesh sheets 71 by means of draw hook binding.

[0031] Preferably, it also includes a prestressed anchor 8, which is located on the steel backing plate 5 and corresponds to the intelligent prestressed steel strand 4 and the prestressed steel beam 6, and fixes the intelligent prestressed steel strand 4 and the prestressed steel beam 6;The prestressed anchor is selected according to the model and the number of strands of the prestressed steel beam.

[0032] The embodiment of the application also provides a construction method of a containment structure local test component, which comprises the following steps:

[0033] (1) weld the peg 3 to the steel lining plate 2 by welding, and place the steel lining plate 2 at the bottom as a support mold for concrete pouring;

[0034] (2) place a concrete pouring formwork along the direction of the peg 3 of the steel lining plate 2;

[0035] (3) tie the horizontal and vertical reinforcement mesh 71 and put it into the concrete pouring formwork, and pass through the prestressed duct;

[0036] (4) pour concrete and vibrate it to make the concrete evenly distributed;

[0037] (5) after 28 days of maintenance, the steel lining plate 2 is tightly attached to the inner side of the concrete slab 1, and is fixed on the concrete slab 1 by means of the stud 3;

[0038] (6) the prestressed steel strand 6 and the intelligent prestressed steel strand 4 are passed through the prestressed duct, and are fixed on the steel backing plate 5 on one side by means of the clamping piece and are fixed on the steel backing plate 5 on the other side by means of the prestressed anchor 8.

[0039] Preferably, in the step (1), the stud 3 is welded and fixed on the steel lining plate 2, and the stud 3 cannot melt through the steel lining plate to ensure the integrity of the steel lining plate 2.

[0040] Preferably, in the step (2), the concrete formwork is tightly attached to the edge of the steel lining plate 2.

[0041] Preferably, in the step (3), the prestressed duct is passed through the gap in the steel reinforcement mesh 7, the stud 3 is inserted into the gap in the steel reinforcement mesh 7, and the prestressed duct can adopt a PVC corrugated pipe or a metal corrugated pipe.

[0042] Referring to the accompanying drawings Figure 4 Preferably, in the step (3), the intelligent prestressed steel strand 4 is arranged at the vertical No. 1 and No. 2 ducts and the horizontal No. 3 and No. 4 ducts of the concrete slab 1, and the prestressed steel strand 6 is arranged at the remaining ducts, so as to ensure uniform application of prestress.

[0043] Preferably, two intelligent prestressed steel strands 4 are arranged at the vertical No. 1 and No. 2 ducts and the horizontal No. 3 and No. 4 ducts of the concrete slab 1 respectively, and two prestressed steel strands 6 are arranged in the remaining ducts respectively.

[0044] Preferably, in the step (3), after the other side of the prestressed steel strand 6 and the intelligent prestressed steel strand 4 is tensioned, the prestressed anchor 8 is used to fix the steel backing plate 5, and the steel backing plate 5 can further make the prestress applied to the concrete slab 1 more uniform.

[0045] Referring to the accompanying drawings Figure 5 The three groups of local test components of the containment structure of the embodiment of the application are different from the three groups of local test components of the prior art Figure 5The middle 1-3 groups correspond to each other, the tensioning process of the intelligent prestressed steel strand 4 is tensioned according to 0->10% sigma k->30% sigma k->50% sigma k->100% sigma k, the actual tensioning stress value collected by the intelligent prestressed steel strand 4 of the embodiment of the application, from the figure, it can be seen that the linearity in the tensioning process of the intelligent prestressed steel strand 4 of the embodiment of the application is kept good, the final control force is close to the value of 1395MPa, the prestressed tensioning process is well controlled, and the test requirements are met.

[0046] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A partial test component for a containment structure, characterized in that: The system includes a concrete slab (1), a steel lining plate (2), studs (3), intelligent prestressed steel strands (4), a steel mesh (7), and prestressed steel bundles (6); the steel mesh (7) is located inside the concrete slab (1); the intelligent prestressed steel strands (4) and the prestressed steel bundles (6) pass through the steel mesh (7) inside the concrete slab (1); the intelligent prestressed steel strands (4) have built-in intelligent sensors; the steel lining plate (2) is close to the inner side of the concrete slab (1) and is fixed by the studs (3); the studs (3) are welded to the steel lining plate (2).

2. The containment structure partial test component according to claim 1, characterized in that: It also includes a steel pad (5) which is located around the concrete slab (1) to fix the intelligent prestressed steel strand (4).

3. A partial test component for a containment structure according to claim 2, characterized in that: It also includes a prestressed anchor (8), which is located on the steel pad (5) and corresponds to the intelligent prestressed steel strand (4) to fix the intelligent prestressed steel strand (4).

4. A partial test component for a containment structure according to claim 1, characterized in that: The steel mesh (7) is formed by transverse and longitudinal reinforcing mesh (71) and tie bars (72).

5. A construction method for a partial test component of a containment structure according to any one of claims 1 to 4, characterized in that: Includes the following steps: (1) The studs (3) are welded to the steel lining plate (2) by welding, and the steel lining plate (2) is placed at the bottom as a support mold for concrete pouring; (2) Place the concrete pouring support formwork along the direction of the studs (3) on the steel lining plate (2); (3) Tie the horizontal and vertical reinforcing mesh (71) to form a reinforcing mesh (7), and put it into the concrete pouring formwork and insert it into the prestressed duct; (4) Pour concrete and vibrate it to ensure that the concrete is evenly distributed; (5) After 28 days of curing, the steel lining plate (2) is attached tightly to the inside of the concrete slab (1) and fixed to the concrete slab (1) by studs (3); (6) Pass the prestressed steel strand (6) and the intelligent prestressed steel strand (4) through the duct, fix one side to the steel pad (5) by a clamp, and fix the other side to the steel pad (5) by a prestressed anchor (8).

6. The construction method for a partial test component of a containment structure according to claim 5, characterized in that: In step (6), the prestressed steel strands (6) and the intelligent prestressed steel strands (4) are symmetrically arranged in the concrete slab (1).

7. The construction method for a partial test component of a containment structure according to claim 5, characterized in that: In step (6), the intelligent prestressed steel strands (4) are installed in the vertical ducts 1 and 2 and the horizontal ducts 3 and 4 of the concrete slab (1), and the prestressed steel strands (6) are installed in the remaining ducts.

8. The construction method for a partial test component of a containment structure according to claim 5, characterized in that: In step (6), two intelligent prestressed steel strands (4) are installed in the vertical ducts 1 and 2 and the horizontal ducts 3 and 4 of the concrete slab (1), and two prestressed steel strands (6) are installed in the remaining reserved ducts.

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