Pre-tensioning method prefabricated T beam

Abstract

The invention discloses a T beam prefabricated through a pre-tensioning method. The T beam prefabricated through the pre-tensioning method comprises a beam body. The beam body extends along a first direction; the first left prestress part and the first right prestress part are symmetrically arranged on the beam body in the first direction, a certain included angle is formed between the first left prestress part and the first direction, one end of the first left prestress part is fixed to the end, in the first direction, of the beam body, and the other end of the first left prestress part is fixed to the bottom of the beam body; the first left prestress part and the first right prestress part at least penetrate through the central cross section of the beam body in the first direction. According to the T beam prefabricated through the pre-tensioning method, the engineering cost is saved, the construction procedure is simplified, the production efficiency is improved, and the bearing capacity and prestress in the midspan of the beam body are improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to a prefabricated T-beam using a pre-tensioning method. Background Art

[0002] Prefabricated T-beams have simple cross-sectional shapes and the flanges on both sides can be extended to the maximum extent. They not only save concrete, but also have the advantages of light weight, strong spanning ability, large bearing capacity, and low maintenance cost. They are widely used in highway bridges and urban bridges.

[0003] The traditional post-tensioned prefabricated T-beam has the following shortcomings: 1. Concrete is easy to penetrate into the prestressed pipe during pouring, blocking the pipe and making it difficult to clear it, which increases the construction cost; 2. Since the prestressed pipe is arranged in a concave curve, the inlet and outlet of the grouting are both located on the anchor pads at both ends, which are at the highest point of the pipe curve. Therefore, due to the flow of slurry, air masses will be trapped in the grouting pipe during the grouting process, which will cause the grouting to be loose and affect the durability of the prestressing; 3. The curved prestressed pipe is easy to deform when pouring precast beam concrete, which affects the smoothness and flow of the actual curve of the pipe. The friction generated when the prestressed tendons contact the pipe wall is greater than the theoretical calculation, which leads to insufficient prestressing, affecting the force performance and service life of the structure; 4. The prestressed tendon anchors and pipes are permanent structures and cannot be reused, and the cost is relatively high. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a pre-tensioned prefabricated T-beam, which saves engineering costs, simplifies construction procedures, improves production efficiency, and increases the bearing capacity and prestressing force of the beam body in the mid-span.

[0005] A prestressed T-beam according to an embodiment of the present invention comprises: a beam body, which extends along a first direction; a first left prestressed member and a first right prestressed member, which are symmetrically arranged on the beam body along the first direction, the first left prestressed member forms a certain angle with the first direction, and one end is fixed to one end of the beam body along the first direction, and the other end is fixed to the bottom of the beam body; the first left prestressed member and the first right prestressed member are at least arranged through the central cross section of the beam body along the first direction.

[0006] Compared with the need to set up prestressed pipes in the post-tensioning method, the pre-tensioned prefabricated T-beam according to the present invention saves engineering costs, and the anchoring clamps used to fix the prestressed parts can be repeatedly used. At the same time, there will be no loss of prestress caused by the friction between the prestressed parts and the prestressed pipes, thereby ensuring the effective bearing capacity of the structure. The prestressed steel bundle is arranged in the prestressed pipe. The arrangement of the prestressed steel bundle in the prestressed pipe in the post-tensioning method is changed to a single prestressed part arranged in the beam body. The prestressed parts are distributed more evenly and can be fully wrapped and bonded with the concrete, so that the prestress at different positions of the beam body is evenly distributed. Compared with the long beam curve, the straight line arrangement of the prestressed parts in the present application is convenient for positioning, the accuracy can be effectively controlled, the construction process is simplified, and the production efficiency is high. The first left prestressed part and the first right prestressed part are both at least passed through the central cross-section of the beam body along the first direction, which can improve the bearing capacity and prestress of the beam body in the span.

[0007] According to some embodiments of the present invention, the first left prestressed member and the first right prestressed member both pass through the first cross-section and the second cross-section of the beam body along the first direction, and the first cross-section and the second cross-section are respectively located on opposite sides of the central cross-section along the first direction.

[0008] According to some embodiments of the present invention, the distance between the first cross section and the second cross section along the first direction is l1, and the length of the beam body along the first direction is l2, wherein (1 / 25)l2≤l1≤(1 / 2)l2.

[0009] According to some embodiments of the present invention, it further comprises a second left prestressed member and a second right prestressed member, wherein the second left prestressed member and the second right prestressed member are symmetrically arranged on the beam body along the first direction, the second left prestressed member forms a certain angle with the first direction, and one end of the second left prestressed member is fixed to one end of the beam body along the first direction, and the other end is fixed to the bottom of the beam body; One end of the second left prestressed member connected to the bottom of the beam body and one end of the second right prestressed member connected to the bottom of the beam body are respectively located on opposite sides of the central cross section of the beam body along the first direction.

[0010] According to some embodiments of the present invention, along the first direction, the distance between one end of the second left prestressed member connected to the bottom of the beam body and one end of the second right prestressed member connected to the bottom of the beam body is l3, and the length of the beam body along the first direction is l2, wherein (1 / 8)l2≤l3≤(2 / 3)l2.

[0011] According to some embodiments of the present invention, the first left prestressed member is parallel to the second left prestressed member.

[0012] According to some embodiments of the present invention, the angle between the first left prestressed member and the first direction is α1, 5°≤α1≤20°; An included angle between the second left prestressed member and the first direction is α2, 5°≤α2≤20°.

[0013] According to some embodiments of the present invention, along the second direction, the first left prestressed member is arranged at a plurality of intervals, the first right prestressing member is arranged at a plurality of intervals corresponding to the plurality of the first left prestressed members in a one-to-one manner, and the second direction is the height direction of the beam body; Along the second direction, the second left prestressed members are arranged at intervals of multiple, and the second right prestressing members are arranged at intervals of multiple corresponding to the first left prestressed members.

[0014] According to some embodiments of the present invention, the first left prestressed member and the first right prestressed member are spaced apart from each other along a third direction, and the third direction is a width direction of the beam body.

[0015] According to some embodiments of the present invention, along a third direction, the first left prestressed members are arranged at multiple intervals, the first right prestressing members are arranged at multiple intervals corresponding to the multiple first left prestressed members in a one-to-one manner, the multiple first left prestressed members and the multiple first right prestressed members are arranged alternately, and the third direction is the width direction of the beam body.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic elevation view of a prefabricated T-beam according to an embodiment of the present invention; Figure 2 is a schematic diagram of the arrangement of prestressed members in a prefabricated T-beam according to an embodiment of the present invention; Figure 3 is a schematic cross-sectional view of a prefabricated T-beam according to an embodiment of the present invention; Figure 4 yes Figure 1 Schematic diagram of the AA position in the middle; Figure 5 yes Figure 1 Schematic diagram of the middle BB; Figure 6 yes Figure 1 Schematic diagram at CC in the middle; Figure 7 yes Figure 1 Schematic diagram of DD in the figure.

[0018] Reference numerals: Prefabricated T beam 100, Beam body 10, central cross section 10a, first cross section 10b, second cross section 10c, The first left prestressed component 20 , the first right prestressed component 30 , the second left prestressed component 40 , and the second right prestressed component 50 . DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0021] The following describes a pre-tensioned prefabricated T-beam 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0022] Reference Figure 1-Figure 3 The prestressed T-beam 100 according to an embodiment of the present invention includes a beam body 10 , and the beam body 10 extends along a first direction; illustratively, the first direction may be a length direction of the beam body 10 .

[0023] The first left prestressed component 20 and the first right prestressed component 30 are symmetrically arranged on the beam body 10 along the first direction.

[0024] It should be noted that the first left prestressed component 20 and the first right prestressed component 30 may be in the same plane, or may be along a third direction, and the first left prestressed component 20 and the first right prestressed component 30 are parallel.

[0025] The first left prestressed component 20 and the first right prestressed component 30 may be single prestressed steel bars, which can be fully wrapped and bonded with concrete compared to the prestressed steel strands in the post-tensioning method, and the tension of the prestressed steel bars is evenly distributed.

[0026] The first left prestressed member 20 forms a certain angle with the first direction, and one end is fixed to one end of the beam body 10 along the first direction, and the other end is fixed to the bottom of the beam body 10; correspondingly, the first right prestressed member 30 forms a certain angle with the first direction, and one end is fixed to the other end of the beam body 10 along the first direction, and the other end is fixed to the bottom of the beam body 10.

[0027] The first left prestressed member 20 and the first right prestressed member 30 are arranged in a straight line shape, which is convenient for positioning and can effectively control the accuracy compared with the long beam curve shape, thus simplifying the construction process and improving the production efficiency.

[0028] Compared with the post-tensioning construction method, the anchor clamps used to fix the prestressed parts can be reused in the pre-tensioning method, and there is no need to set up prestressed pipes, which saves engineering costs. At the same time, there will be no prestress loss caused by friction between the prestressed parts and the prestressed pipes, thus ensuring the effective bearing capacity of the structure.

[0029] The first left prestressed member 20 and the first right prestressed member 30 are both at least arranged through the central cross section 10a of the beam body 10 along the first direction.

[0030] The first left prestressed member 20 and the first right prestressed member 30 can both be arranged through the central cross section 10a of the beam body 10 along the first direction, or the first left prestressed member 20 and the first right prestressed member 30 can both be arranged through the central cross section 10a of the beam body 10 along the first direction and the cross sections on one side or both sides of the central cross section 10a. In this way, the bearing capacity and prestress of the beam body 10 in the mid-span can be improved.

[0031] Therefore, refer to Figure 1-Figure 3 , compared with the post-tensioning method, the pre-stressed prefabricated T-beam 100 according to the present invention needs to set up a prestressed pipe, and the anchoring clamps used to fix the prestressed parts can be repeatedly used, which saves engineering costs. At the same time, there will be no loss of prestress caused by the friction between the prestressed parts and the prestressed pipe, ensuring the effective bearing capacity of the structure. The prestressed steel bundle is arranged in the prestressed pipe. The arrangement of the prestressed steel bundle in the prestressed pipe in the post-tensioning method is changed to a single arrangement of the prestressed parts in the beam body 10. The prestressed parts are distributed more evenly and can be fully wrapped and bonded with the concrete, so that the prestress at different positions of the beam body 10 is evenly distributed. Compared with the long beam curve, the straight line arrangement of the prestressed parts in the present application is convenient for positioning, the accuracy can be effectively controlled, the construction process is simplified, and the production efficiency is high. The first left prestressed part 20 and the first right prestressed part 30 are both at least passed through the central cross section 10a of the beam body 10 along the first direction, which can improve the bearing capacity and prestress of the beam body 10 in the span.

[0032] In some embodiments of the present invention, reference Figure 1-Figure 3The first left prestressed member 20 and the first right prestressed member 30 are both arranged through the first cross section 10b and the second cross section 10c of the beam body 10 along the first direction, and the first cross section 10b and the second cross section 10c are respectively located on opposite sides of the central cross section 10a along the first direction.

[0033] By penetrating the first left prestressed component 20 and the first right prestressed component 30 through the first cross-section 10b and the second cross-section 10c of the beam body 10 along the first direction and respectively located on the opposite sides of the central cross-section 10a along the first direction, the intersection area of ​​the first left prestressed component 20 and the first right prestressed component 30 in the mid-span of the beam body 10 is increased, and the bearing capacity and prestress of the mid-span of the beam body 10 are further increased.

[0034] It can be understood that, along the first direction, the distance between the first cross section 10b and the central cross section 10a and the distance between the second cross section 10c and the central cross section 10a can be the same; or they can be different. For example, along the first direction, the distance between the first cross section 10b and the central cross section 10a can be greater than or less than the distance between the second cross section 10c and the central cross section 10a. Preferably, along the first direction, the distance between the first cross section 10b and the central cross section 10a and the distance between the second cross section 10c and the central cross section 10a are the same.

[0035] In some embodiments of the present invention, reference Figure 1 and Figure 3 , the distance between the first cross section 10b and the second cross section 10c along the first direction is l1, and the length of the beam body 10 along the first direction is l2, wherein (1 / 25)l2≤l1≤(1 / 2)l2.

[0036] By setting the distance l1 between the first cross section 10b and the second cross section 10c along the first direction to (1 / 25) l2-(1 / 2) l2, the arrangement is facilitated while ensuring the bearing capacity and prestressing force in the mid-span.

[0037] Specifically, the distance l1 between the first cross section 10b and the second cross section 10c along the first direction may be (1 / 25) l2, (1 / 20) l2, (1 / 15) l2, (1 / 10) l2, (1 / 8) l2, (1 / 6) l2, (1 / 4) l2, (1 / 2) l2, etc.

[0038] In some embodiments of the present invention, reference Figure 1 , Figure 2 and Figure 4The prestressed T-beam 100 further includes a second left prestressed member 40 and a second right prestressed member 50. The second left prestressed member 40 and the second right prestressed member 50 are symmetrically arranged on the beam body 10 along a first direction. Exemplarily, the second left prestressed member 40 and the second right prestressed member 50 can be in the same plane or along a third direction. The second left prestressed member 40 is parallel to the second right prestressed member 50.

[0039] The second left prestressed member 40 forms a certain angle with the first direction, and one end is fixed to one end of the beam body 10 along the first direction, and the other end is fixed to the bottom of the beam body 10; correspondingly, the second right prestressed member 50 forms a certain angle with the first direction, and one end is fixed to the other end of the beam body 10 along the first direction, and the other end is fixed to the bottom of the beam body 10.

[0040] The second left prestressed component 40 and the second right prestressed component 50 can be single prestressed steel bars, which can fully wrap and bond with concrete compared to the prestressed steel strands in the post-tensioning method, and the tension of the prestressed steel bars is evenly distributed.

[0041] One end of the second left prestressed member 40 connected to the bottom of the beam body 10 and one end of the second right prestressed member 50 connected to the bottom of the beam body 10 are respectively located on opposite sides of the central cross-section 10a of the beam body 10 along the first direction, so as to improve the bearing capacity and prestress of the beam body 10 between the midline cross-section and the two ends of the beam body 10.

[0042] In some embodiments of the present invention, reference Figure 2 , along the first direction, the distance between one end of the second left prestressed member 40 connected to the bottom of the beam body 10 and one end of the second right prestressed member 50 connected to the bottom of the beam body 10 is l3, and the length of the beam body 10 along the first direction is l2, where (1 / 8)l2≤l3≤(2 / 3)l2.

[0043] By setting the distance l3 between one end of the second left prestressed member 40 connected to the bottom of the beam body 10 and one end of the second right prestressed member 50 connected to the bottom of the beam body 10 along the first direction to (1 / 8) l2-(2 / 3) l2, it is easy to arrange while ensuring the bearing capacity and prestress of the beam body 10 on both sides of the mid-span.

[0044] Specifically, the distance l3 between one end of the second left prestressed member 40 connected to the bottom of the beam body 10 and one end of the second right prestressed member 50 connected to the bottom of the beam body 10 can be (1 / 8)l2, (1 / 7)l2, (1 / 6)l2, (1 / 5)l2, (1 / 4)l2, (1 / 3)l2, (1 / 2)l2, (2 / 3)l2, etc.

[0045] In some embodiments of the present invention, reference Figure 1 and Figure 2, the first left prestressed member 20 is parallel to the second left prestressed member 40.

[0046] The first left prestressed component 20 and the second left prestressed component 40 are arranged in parallel, which is convenient for arrangement and makes the prestress of the entire beam body 10 uniform.

[0047] Of course, it is understandable that the angle between the first left prestress and the first direction is different from the angle between the second left prestress and the first direction. Exemplarily, the angle between the first left prestress and the first direction may be greater than the angle between the second left prestress and the first direction, or the angle between the first left prestress and the first direction may be less than the angle between the second left prestress and the first direction. Preferably, when the angle between the first left prestress and the first direction is different from the angle between the second left prestress and the first direction, the angle between the first left prestress and the first direction is greater than the angle between the second left prestress and the first direction.

[0048] Correspondingly, the first right prestressed member 30 is parallel to the second right prestressed member 50 .

[0049] Other configurations of the angles between the first right prestressed component 30 and the second right prestressed component 50 and the first direction refer to the above-mentioned first left prestressed component 20 and the second left prestressed component 40 and are not described in detail here.

[0050] In some embodiments of the present invention, reference Figure 1 The angle between the first left prestressed member 20 and the first direction is α1, 5°≤α1≤20°; the angle between the second left prestressed member 40 and the first direction is α2, 5°≤α2≤20°.

[0051] By setting the angle α1 between the first left prestressed component 20 and the first direction and the angle α2 between the second left prestressed component 40 and the first direction to a range of 5°-20°, the first left prestressed component 20 can be penetrated at the central cross-section 10a of the beam body 10 along the first direction, and the second left prestressed component 40 can be located on one side of the central cross-section 10a of the beam body 10 along the first direction, thereby ensuring the bearing capacity and prestress of the beam body 10.

[0052] Specifically, the angle α1 between the first left prestressed member 20 and the first direction can be 5°, 7°, 8°, 11°, 13°, 14°, 16°, 18°, 20°, etc.

[0053] The angle α1 between the second left prestressed member 40 and the first direction may be 5°, 7°, 8°, 11°, 13°, 14°, 16°, 18°, 20°, etc.

[0054] Correspondingly, the angle between the first right prestressed component 30 and the first direction is α1, 5°≤α1≤20°; the angle between the second right prestressed component 50 and the first direction is α2, 5°≤α2≤20°, so that the first left prestressed component 20 and the first right prestressed component 30 can intersect at the central cross-section 10a of the beam body 10 along the first direction, and the second left prestressed component 40 and the second right prestressed component 50 can be located on opposite sides of the central cross-section 10a of the beam body 10 along the first direction.

[0055] In some embodiments, the angle α1 between the first right prestressed member 30 and the first direction may be 5°, 7°, 8°, 11°, 13°, 14°, 16°, 18°, 20°, etc.

[0056] The angle α1 between the second right prestressed member 50 and the first direction may be 5°, 7°, 8°, 11°, 13°, 14°, 16°, 18°, 20°, etc.

[0057] In some embodiments of the present invention, reference Figure 4-Figure 7 , along the second direction, the first left prestressed member 20 is arranged at intervals of multiple, the first right prestressing member and the multiple first left prestressed members 20 are arranged at intervals of multiple, and the second direction is the height direction of the beam body 10; By arranging a plurality of first left prestressed members 20 at intervals along the second direction and arranging a plurality of first right prestressed members 30 at intervals corresponding to the plurality of first left prestressed members 20 one by one, the bearing capacity and prestress of the beam body 10 are improved.

[0058] Along the second direction, the second left prestressing members 40 are arranged in plurality at intervals, and the second right prestressing members are arranged in plurality at intervals corresponding to the plurality of first left prestressing members 20 in a one-to-one manner.

[0059] By arranging a plurality of second left prestressed members 40 at intervals along the second direction and arranging a plurality of second right prestressed members 50 at intervals corresponding to the plurality of second left prestressed members 40 one by one, the bearing capacity and prestress of the beam body 10 are improved.

[0060] It is understandable that the first left prestressed member 20 and the second left prestressed member 40 are arranged at intervals along the second direction to avoid the first left prestressed member 20 and the second left prestressed member 40 from crossing. Correspondingly, the first right prestressed member 30 and the second right prestressed member 50 are arranged at intervals along the second direction.

[0061] The multiple first left prestressed members, the multiple second left prestressed members 40, the multiple first right prestressed members, and the multiple second right prestressed members 50 can be arranged at a certain spacing, or can be arranged at random spacings. Preferably, the multiple first left prestressed members, the multiple second left prestressed members 40, the multiple first right prestressed members, and the multiple second right prestressed members 50 are arranged at a certain spacing. Further, the multiple first left prestressed members, the multiple second left prestressed members 40, the multiple first right prestressed members, and the multiple second right prestressed members 50 can all be arranged at a certain spacing.

[0062] The spacing between the adjacent first left prestressed member 20 and the second left prestressed member 40 may be the same as or different from the spacing between the two adjacent first left prestressed members 20. Preferably, the spacing between the adjacent first left prestressed member 20 and the second left prestressed member 40 is the same as the spacing between the two adjacent first left prestressed members 20. Correspondingly, the spacing between the adjacent first right prestressed member 30 and the second right prestressed member 50 is preferably the same as the spacing between the two adjacent first right prestressed members 30.

[0063] In some embodiments of the present invention, reference Figure 4-Figure 7 Along the third direction, the first left prestressed member 20 and the first right prestressed member 30 are spaced apart from each other, and the third direction is the width direction of the beam body 10 .

[0064] By arranging the first left prestressed member 20 and the first right prestressed member 30 in a spaced relationship along the third direction, the arrangement of the first left prestressed member 20 and the first right prestressed member 30 at the intersection is facilitated.

[0065] Along the third direction, the second left prestressed member 40 and the second right prestressed member 50 may be spaced apart or may be in the same plane. Preferably, along the third direction, the second left prestressed member 40 and the second right prestressed member 50 are spaced apart.

[0066] In some embodiments of the present invention, reference Figure 4-Figure 7 Along the third direction, the first left prestressed members 20 are arranged in multiple intervals, the first right prestressed members are arranged in multiple intervals corresponding to the multiple first left prestressed members 20 one by one, the multiple first left prestressed members 20 and the multiple first right prestressed members 30 are staggered, and the third direction is the width direction of the beam body 10.

[0067] The first left prestressing member 20 and the first right prestressing member are arranged in multiple intervals along the third direction, so that the beam body 10 has a uniform prestress of bearing capacity in the third direction. The multiple first left prestressing members 20 and the multiple first right prestressing members 30 are staggered along the third direction, so that both ends of the beam body 10 are uniformly prestressed in the third direction.

[0068] Correspondingly, along the third direction, the second left prestressed members 40 are arranged in multiple intervals, the second right prestressed members are arranged in multiple intervals corresponding to the multiple second left prestressed members 40, and the multiple second left prestressed members 40 and the multiple second right prestressed members 50 are arranged in an alternating manner.

[0069] The plurality of first left prestressed members 20 along the third direction may be arranged at the same spacing intervals, or may be arranged at different spacing intervals. Preferably, the plurality of first left prestressed members 20 along the third direction are arranged at the same spacing intervals. Correspondingly, preferably, the plurality of first right prestressed members 30 along the third direction are arranged at the same spacing intervals. Along the third direction, the first right prestressed member 30 may be located at any position between two adjacent first prestressed members. Preferably, the first right prestressed member 30 may be located at the center of two adjacent first prestressed members.

[0070] The positional relationship between the multiple second left prestressed parts 40, between the multiple second right prestressed parts 50, and between the second left prestressed parts 40 and the second right prestressed parts 50 refers to the positional relationship between the multiple first left prestressed parts 20, the multiple first right prestressed parts 30, and the first left prestressed part 20 and the first right prestressed part 30, and will not be repeated here.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pre-tensioned prefabricated T-beam, characterized in that: include: A beam body extending along a first direction; A first left prestressed member and a first right prestressed member, wherein the first left prestressed member and the first right prestressed member are symmetrically arranged on the beam body along the first direction, the first left prestressed member forms a certain angle with the first direction, and one end of the first left prestressed member is fixed to one end of the beam body along the first direction, and the other end is fixed to the bottom of the beam body; The first left prestressed member and the first right prestressed member are both at least arranged through a central cross section of the beam body along the first direction.

2. The prestressed prefabricated T-beam according to claim 1, characterized in that: The first left prestressed member and the first right prestressed member both penetrate the first cross section and the second cross section of the beam body along the first direction, and the first cross section and the second cross section are respectively located on opposite sides of the central cross section along the first direction.

3. The prestressed prefabricated T-beam according to claim 2, characterized in that: The distance between the first cross section and the second cross section along the first direction is l1, and the length of the beam body along the first direction is l2, wherein (1 / 25)l2≤l1≤(1 / 2)l2.

4. The prestressed prefabricated T-beam according to claim 1, characterized in that: It also includes a second left prestressed member and a second right prestressed member, wherein the second left prestressed member and the second right prestressed member are symmetrically arranged on the beam body along the first direction, the second left prestressed member forms a certain angle with the first direction, and one end of the second left prestressed member is fixed to one end of the beam body along the first direction, and the other end is fixed to the bottom of the beam body; One end of the second left prestressed member connected to the bottom of the beam body and one end of the second right prestressed member connected to the bottom of the beam body are respectively located on opposite sides of the central cross section of the beam body along the first direction.

5. The prestressed prefabricated T-beam according to claim 4, characterized in that: Along the first direction, the distance between one end of the second left prestressed member connected to the bottom of the beam body and one end of the second right prestressed member connected to the bottom of the beam body is l3, and the length of the beam body along the first direction is l2, where (1 / 8)l2≤l3≤(2 / 3)l2.

6. The prestressed prefabricated T-beam according to claim 4, characterized in that: The first left prestressed member is parallel to the second left prestressed member.

7. The prestressed prefabricated T-beam according to claim 4, characterized in that: The angle between the first left prestressed member and the first direction is α1, 5°≤α1≤20°; An included angle between the second left prestressed member and the first direction is α2, 5°≤α2≤20°.

8. The prestressed prefabricated T-beam according to claim 4, characterized in that: Along the second direction, the first left prestressed members are arranged at intervals of a plurality, the first right prestressing members are arranged at intervals of a plurality corresponding to the first left prestressed members in a one-to-one manner, and the second direction is the height direction of the beam body; Along the second direction, the second left prestressed members are arranged at multiple intervals, and the second right prestressed members are arranged at multiple intervals corresponding to the first left prestressed members in a one-to-one manner.

9. The prestressed prefabricated T-beam according to claim 1, characterized in that: The first left prestressed member and the first right prestressed member are spaced apart from each other along a third direction, and the third direction is a width direction of the beam body.

10. The prestressed prefabricated T-beam according to claim 1, characterized in that: Along the third direction, the first left prestressed members are arranged at intervals of multiple, the first right prestressing members are arranged at intervals corresponding to the multiple first left prestressed members in a one-to-one manner, the multiple first left prestressed members and the multiple first right prestressed members are arranged alternately, and the third direction is the width direction of the beam body.

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