[0040] The embodiments of the present invention will be described below by specific embodiments, and those skilled in this specification can easily understand other advantages and efficacy of the present invention.
[0041] The present invention provides a prestressed carbon plate -ecc combination reinforced steel concrete structure and construction method, such as Figure 1 to 4 Indicated.
[0042] Prestressed carbon plate-ECC combined reinforced concrete structure, including reinforced concrete beams 1, cement-based composite, and a prestressed plate material 4, and the prestressed plate material 4, and the cement-based composite ECC layer 2 The adhesive 3 is bonded to the prestressing plate 4; the outer side of the prestressing plate material 4 is also covered with a cement-based composite ECC layer 2; wherein the cement-based composite ECC layer 2 can also be referred to as an adhesive layer.
[0043] The thickness of the cement-based composite ECC layer is the same as the thickness of the cement-based composite ECC layer 2, and in the present embodiment, the thickness of 20 mm.
[0044] The fine bones of the cement-based composite ECC layer and cement-based composite ECC layer include one or more of fly ash, silica ash and mineral powder.
[0045] The prestressed plate material 4 can be reinforced by a prior art or rear sheet method.
[0046] When the primary method is used to reinforce the combination, the prestressed carbon plate-ECC combined the construction method of the reinforced concrete structure, including the following steps:
[0047]1) Cleaning the reinforcing reinforced concrete beam 1 for chisel cleaning, and moist after cleaning;
[0048] 2) Take a tension device and anchoring device that is fixed for the pre-stress sheet 4 sheets in both end beam edges of the reinforced concrete beam 1; in this example, the two ends of the reinforced concrete beam 400mm from the beam boundary Differential holes.
[0049] 3) Anchoring the pre-stress sheet on the prestressed sheet of tension, and the prestressed plate material is separated from the intermediate spacer in the middle of the reinforced concrete beam for subsequent addition of cement-based composites ECC layer; this embodiment In the middle, the thickness of the spacer layer is 20 mm, i.e., the lower cement-based composite ECC layer 2 of the cement-based composite ECC layer and the prestressed plate material is 20 mm.
[0050] 4) Perform a prestressed plate tension, allowing the prestressed plate to reach the tensile control stress;
[0051] 5) Removing the pads of the spacer in the interval layer of the cement-based composite ECC layer, as well as the pouring and maintenance of the lower part of the prestressed plate.
[0052] 6) After the cement-based composite ECC layer is hardening, the prestressed plate material is placed, i.e., the reinforcement of the reinforced concrete beam.
[0053] When the rear manifold is used to reinforce the combination, the prestressed carbon plate-ECC combined reinforced steel concrete structure construction method, including the following steps:
[0054] 1) Cleaning the reinforced concrete beam for chisel cleaning, and moist after cleaning;
[0055] 2) Directional anchoring apparatus and prestressed loading apparatus for prestabled sheet tensile in both end beam boundaries of reinforced concrete beams;
[0056] 3) Application of the prestressed plate to the isolation agent or wrap it with an isolation envelope, and then secured the prestressed plate to the bottom of the reinforced concrete beam to be reinforced by the block; in this example, the prestressed plate is intervals. Fixed 20 mm under the bottom of the reinforced concrete beam to be reinforced.
[0057] 4) Watering cement-based composite ECC layer on both sides of the prestressed plate, and the prestressed plate material is divided into a cement-based composite ECC layer into a cement-based composite ECC layer and a cement-based composite ECC layer two, this In an embodiment, the thickness of the cement-based composite ECC layer and the cement-based composite ECC layer is 20 mm.
[0058] 5) After the cement-based composite ECC layer reaches the intensity of the design requirements, the prestressed sheet material is pulled by the pre-stress load device, and the prestressed plate material is anchored after the prestressed load control stress, and the prestressed sheet will be The prestress is applied to the reinforcing laminated layer to achieve reinforcing reinforced reinforced concrete beams, and the cement-based composite ECC layer wrapped in the lower part of the prestressed plate can protect the prestressed plate, isolate the external harsh environment, greatly reduced Erosion of the prestressed sheet material.
[0059] In the specific construction, the prestressed carbon sheet-ECC combined with the construction method of reinforcing the reinforced concrete structure, the construction steps are detailed:
[0060] 1) According to the length of the reinforced concrete beam to be reinforced, the material characteristics of the prestressed plate material, the size of the tensile control stress, calculate the length, number of the prestressed plate material in this embodiment, and take it; at the same time, consider the prestressed plate material Thickness and thickness of the adhesive layer - cement-based composite ECC layer to be pouring; in this example, the pre-selected pre-plated material is a carbon fiberboard, and the specific material properties of its specific material are shown in Table 1;
[0061]
[0062] 2) Determine the size of the slot size and opening depth of the bottom of the reinforced concrete beam, considering the thickness of the carbon fiberboard and the thickness of the adhesive layer cement-based composite ECC layer, using the ECC cement-based and both the bond strength of both the outer beam It is also possible to improve the ability to bond strength with carbon fiber sheets, which greatly improves the reinforced durability;
[0063] 3) According to the tension anchor pad, the design position of the fixed end anchor pad is labeled out of the punched position on the side and bottom of the reinforced concrete beam to be reinforced, and the labeled punched position and the tensile end anchor pad, The hole of the expansion bolt on the fixed end anchor pad corresponds to the expansion tube after drilling, and in the hole in the holes; in the present embodiment, the anchor is selected from the curved surface of the curved surface of the carbon fiberboard;
[0064] 4) Before the resin gel is not solidified, screw the expansion bolt in the expansion tube, and secure the tensile anchor pad, the fixed end anchor pad is fixed to the design position;
[0065] 5) Secure the tension clamp to the tensile anchor pad with a tensile bolt bolt;
[0066] 6) After the tension of the tension, the carbon fiberboard to be tested is placed at 205 mm in the bottom of the reinforced concrete beam, and the carbon fiberboard is fixed by the tension of the beam bottom, and the carbon fiberboard is fixed. The two ends are anchored on the anchor of the tensile end and the fixed end, and prepare for tension;
[0067] 7) Use a jack symmetry of Zhanglai-pull jastener, when the tension stress exceeds 115% of the tensile control stress, clamp the anchor and secure the bottom of the middle of the tensile pad; it is necessary to pay attention, Use a jack symmetrical manipulator, that is, all jacks simultaneously, to avoid pulling eccentricity;
[0068] Subsequently, unloading tensile stress is then started, and when the tension stress is unloaded to the tensile control stress, the anchor is fixed to the bottom of the tensile end anchor pad by fixed bolts;
[0069] 8) Catering and maintenance of the cement-based composite ECC layer in the carbon fiber plate and the bottom of the carbon fiber sheet, the lower part of the cement-based composite ECC layer 2, before pouring, need to carry the beam bottom Chisard, clean, wet treatment;
[0070] 9) After the carbon fiber plate is bonded to the whole, the tension stress is completely unloaded, and the tensile pad and the tensile clutches are completely unloaded, and the reinforcing concrete beam can be completed; High-anti-cracking properties of ultra high tough cement-based composites and high impermeability properties to prevent chloride ions and harmful media in an external environment.
[0071] The prestressed carbon plate-ECC combined reinforced concrete structure and construction method, laminated the cement-based composite ECC layer, prestressed material plate, and cement-based composites ECC layer outer abandries in the bottom of the concrete beam; utilizing cement-based composites ECC cracking and infiltration, good durable performance, on the outside of the plate material reinforced by the prestressed sheet, isolates the erosion of the outer harsh environment on the sheet material, but also improve the overall bearing capacity of the concrete beam and the resistance of the beam bottom The ECC layer provided between the prestressed plate and the concrete can delay the peeling of the sheet, effectively transmitting the interface shear stress, thereby better exerting the high tensile strength of the plate material.
[0072] The basic principles, main features, and the advantages of the present invention are shown and described above. Those skilled in the industry will be appreciated that the present invention is not limited by the above embodiments, the above-described embodiments and description are merely illustrative of the invention, and the present invention will also have each in the preceding claims. Variations and improvements, these changes and improvements fall within the scope of the claimed invention. The invention requires the scope of protection by the appended claims and equivalents.
[0073] In the description of the invention, it is to be understood that the orientation or positional relationship of the term "front", "post", "left", "right", "center", and the like are based on the orientation or position shown in the drawing. The relationship is merely description of the present invention and simplified description, rather than indicating or implying means to the device or element must have a specific orientation, which is a specific directional configuration and operation, and thus is not to be construed as limiting the invention.
