Prestress tensioning pedestal

Abstract

The prestress tensioning pedestal comprises an end tensioning set, the end tensioning set comprises two frame beams, and the two frame beams are oppositely arranged in the first direction and used for anchoring one end of an oblique prestress part; and the bottom tensioning set is arranged between the two frame beams, and the bottom tensioning set is provided with a plurality of anchoring blocks used for anchoring the other ends of the oblique prestress pieces. The prestress tensioning pedestal can be used for tensioning a horizontal prestress part in a precast beam constructed through a pre-tensioning method and can also be used for tensioning an inclined prestress part.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to a prestressed tensioning pedestal. Background Art

[0002] Traditional small box beams or T beams are mostly constructed using post-tensioning. Post-tensioning is the process of tensioning prestressed tendons in prestressed channels after the concrete reaches a certain strength. Since hardened concrete has a restraining effect on prestressed tendons, post-tensioning can achieve inclined or curved prestressed tendon tensioning.

[0003] The pre-tensioning construction method is to perform prestressing before pouring concrete. Due to the lack of necessary node constraints, the pre-tensioning construction method in the existing technology usually uses pedestals located at both ends of the small box girder to tension the horizontal prestressed tendons, but is unable to tension the oblique prestressed tendons. 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 provides a prestressed tensioning pedestal, which can tension the horizontal prestressed members in the prefabricated beam constructed by the pre-tensioning method, and can also tension the oblique prestressed members.

[0005] According to an embodiment of the present invention, the prestressed tensioning pedestal includes: an end tensioning group, which includes two frame beams, the two frame beams are arranged opposite to each other along a first direction, and are used to anchor one end of the oblique prestressed member; and a bottom tensioning group, which is arranged between the two frame beams and is provided with a plurality of anchor blocks for anchoring the other end of the oblique prestressed member.

[0006] According to the prestressed tensioning pedestal of the present invention, by setting two frame beams arranged relatively along the first direction, the two ends of the prestressed member arranged along the first direction can be anchored and tensioned, and one end of the oblique prestressed member along a certain angle with the first direction can be anchored, and the anchor block of the bottom tensioning group can anchor the other end of the oblique prestressed member, thereby realizing the tensioning of the horizontal prestressed member along the first direction and the oblique prestressed member at a certain angle with the first direction. In order to perform pre-tensioning construction on the prefabricated beam, compared with the post-tensioning construction of the prior art, it saves construction costs, improves construction efficiency, reduces construction difficulty, and improves the bearing capacity and prestress of the prefabricated beam.

[0007] According to some embodiments of the present invention, the end tensioning group further comprises: Two fixed reaction walls, the two fixed reaction walls are respectively arranged on the sides of the two frame beams facing each other and fixed to the base, and the fixed reaction walls are provided with a first hole for passing the prestressed member; The frame beam is movably arranged on the base; A retractable member, wherein the fixed end and the retractable end of the retractable member are respectively connected to the fixed reaction wall and the frame beam to change the distance between the fixed reaction wall and the frame beam.

[0008] According to some embodiments of the present invention, the first end opening of the first channel faces away from the frame beam, and the second end opening faces the frame beam. Along the height direction of the fixed reaction wall, the height of the first end opening is not lower than the height of the second end opening.

[0009] According to some embodiments of the present invention, the first channel is opened along a first direction.

[0010] According to some embodiments of the present invention, the frame beam is provided with a second hole for passing the prestressed member, and an anchor is provided on the side of the frame beam facing away from the fixed reaction wall and adjacent to the second hole for fixing the prestressed member.

[0011] According to some embodiments of the present invention, the prestressed member includes a tie rod, one end of which is passed through the first hole and fixedly connected to the frame beam, and the other end of which is used to connect the prestressed line via a detachable connector.

[0012] According to some embodiments of the present invention, an inclined rod is further included, one end of which is connected to the fixed reaction wall, and the other end of which is located on a side of the fixed reaction wall facing the frame beam and connected to the base.

[0013] According to some embodiments of the present invention, the bottom tensioning group includes a bottom plate frame beam disposed between the two fixed reaction walls, the bottom plate frame beam including an upper beam and a lower beam disposed in parallel, and a plurality of support beams respectively connected to the upper beam and the lower beam at both ends; A plurality of anchor blocks are provided on one side of the upper beam facing the lower beam.

[0014] According to some embodiments of the present invention, the upper beam is provided with a third hole, the anchor block is provided with a fourth hole connected to the third hole, and the third hole and the fourth hole are used for passing the prestressed member.

[0015] According to some embodiments of the present invention, the bottom tensioning group further comprises a bottom panel connected to a side of the upper beam facing away from the lower beam; The bottom panel is provided with a fifth hole, and the fifth hole is used for passing the prestressed member.

[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 prestressed tensioning pedestal according to an embodiment of the present invention; Figure 2 yes Figure 1 The enlarged view of point A in the middle; Figure 3 yes Figure 1 The enlarged view of point B in the middle; Figure 4 is a top view of a prestressed tensioning pedestal according to an embodiment of the present invention; Figure 5 yes Figure 2 Enlarged view of point C in the middle; Figure 6 yes Figure 1 Enlarged view of point D in the middle.

[0018] Reference numerals: Pedestal 100, The end tensioning group 10, the frame beam 11, the second hole 11a, the anchor 111, the fixed reaction wall 12, the first hole 12a, the telescopic member 13, the pull rod 14, the connecting member 141, the diagonal rod 15, Bottom tensioning group 20, bottom plate frame beam 21, upper beam 211, third channel 211a, lower beam 212, support beam 213, anchor block 214, fourth channel 214a, bottom panel 22, fifth channel 22a, Base 30, pull-out pile 40, Prestressed member 200. 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 prestressed tensioning stand 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0022] Reference Figure 1 and Figure 2 The prestressed tensioning pedestal 100 according to an embodiment of the present invention includes an end tensioning group 10, which includes two frame beams 11, which are arranged opposite to each other along a first direction and are used to anchor one end of the oblique prestressed member 200; a bottom tensioning group 20, which is arranged between the two frame beams 11 and is provided with a plurality of anchoring blocks 214 for anchoring the other end of the oblique prestressed member 200.

[0023] Specifically, refer to Figure 1 and Figure 2 Two frame beams 11 arranged opposite to each other along the first direction can anchor and tension the prestressed member 200 arranged along the first direction. Of course, one end of the inclined prestressed member 200 can also be anchored, exemplarily in a direction that forms a certain angle with the first direction.

[0024] The bottom tensioning group 20 disposed between the two frame beams 11 can anchor the other end of the oblique prestressed member 200 through a plurality of anchor blocks 214. In this way, the two ends of the oblique prestressed member 200 can be anchored through the frame beam 11 and the anchor blocks 214, respectively, for tensioning. Thus, the prestressed member 200 in the precast beam constructed by the pre-tensioning method can be tensioned. Compared with the post-tensioning method, the pre-tensioning method has a lower cost and obtains better bearing capacity and prestressing performance than the precast beam.

[0025] Therefore, refer to Figure 1 and Figure 2 According to the prestressed tensioning pedestal 100 of the present invention, by setting two frame beams 11 arranged oppositely along the first direction, the two ends of the prestressed member 200 arranged along the first direction can be anchored and tensioned, and one end of the oblique prestressed member 200 along a certain angle with the first direction can be anchored, and the anchor block 214 of the bottom tensioning group 20 can anchor the other end of the oblique prestressed member 200, thereby realizing the tensioning of the horizontal prestressed member 200 along the first direction and the oblique prestressed member 200 at a certain angle with the first direction. In order to perform pre-tensioning construction on the prefabricated beam, compared with the post-tensioning construction of the prior art, it saves construction costs, improves construction efficiency, reduces construction difficulty, and improves the bearing capacity and prestress of the prefabricated beam.

[0026] In some embodiments, there may be two or more anchor blocks 214. Each obliquely arranged prestressed member 200 may correspond to one anchor block 214, or multiple obliquely arranged prestressed members 200 may correspond to one anchor block 214.

[0027] It is understandable that the prestressed member 200 may be a prestressed steel bar, a prestressed steel strand, etc. The prestressed member 200 may be anchored to the frame beam 11 and the anchor block 214 by an anchor.

[0028] In some embodiments of the present invention, reference Figure 1 and Figure 2 The end tensioning group 10 also includes two fixed reaction walls 12 and a retractable member 13. The two fixed reaction walls 12 are respectively arranged on the sides of the two frame beams 11 facing each other and are fixed to the base 30. The fixed reaction wall 12 is provided with a first channel 12a for passing the prestressed member 200. The frame beam 11 is movably arranged on the base 30. The fixed end and the retractable end of the retractable member 13 are respectively connected to the fixed reaction wall 12 and the frame beam 11 to change the distance between the fixed reaction wall 12 and the frame beam 11.

[0029] By means of two fixed reaction walls 12 respectively arranged on the sides of the two frame beams 11 facing each other, and a retractable member 13 arranged between the frame beam 11 and the fixed reaction wall 12, the fixed reaction wall 12 can provide support for the retractable member 13. Through the extension and retraction of the retractable member 13, the frame beam 11 can move relative to the base 30, thereby driving the prestressed member 200 anchored thereto to be tensioned, thereby applying prestress thereto.

[0030] Specifically, the fixed reaction wall 12 can be fixed to the base 30. For example, the fixed reaction wall 12 can be fixedly connected to the base 30 or detachably connected to the base 30. In some embodiments, an anti-pulling pile 40 is provided below the base 30, and the fixed reaction wall 12 can be connected to the anti-pulling pile 40.

[0031] The first channel 12 a provided in the fixed reaction wall 12 can be used to penetrate the prestressed component 200 so as to guide the prestressed component 200 .

[0032] It can be understood that the number of the first holes 12 a can be one or more than two. When the number of the first holes 12 a is more than two, each first hole 12 a can correspond to one prestressed member 200 .

[0033] The frame beam 11 can move relative to the base 30 . Specifically, the frame beam 11 can move relative to the base 30 in a direction away from the fixed reaction wall 12 , so as to tension the prestressed member 200 .

[0034] A pulley may be provided at the bottom of the frame beam 11 so as to move relative to the base 30 ; a slide rail or the like may also be provided so as to move relative to the base 30 in a certain direction.

[0035] The fixed end and the telescopic end are respectively connected to the fixed reaction wall 12 and the frame beam 11. The telescopic member 13 can change the distance between the fixed reaction wall 12 and the frame beam 11 to tension the prestressed member 200. The fixed end of the telescopic member 13 can be connected to the fixed reaction wall 12, and the telescopic end is connected to the frame beam 11; the fixed end of the telescopic member 13 can also be connected to the frame beam 11, and the telescopic end is connected to the fixed reaction wall 12.

[0036] In some embodiments, the retractable member 13 may be a jack or the like. The fixed reaction wall 12 and the frame beam 11 may be provided with one or more retractable members 13. Preferably, the fixed reaction wall 12 and the frame beam 11 are provided with more than two retractable members 13. Further, a plurality of retractable members 13 are provided at intervals along the height direction and the width direction of the fixed reaction wall 12.

[0037] In some embodiments of the present invention, reference Figure 1 and Figure 3 The first end opening of the first channel 12a is away from the frame beam 11, and the second end opening is toward the frame beam 11. Along the height direction of the fixed reaction wall 12, the height of the first end opening is not lower than the height of the second end opening.

[0038] By setting the height of the first end opening of the first channel 12a to be no lower than the height of the second end opening so as to turn the prestressed member 200 passing through the first channel 12a, the setting height of the fixed reaction wall 12 and the frame beam 11 can be reduced, thereby reducing the construction cost.

[0039] Specifically, the height of the first end opening may be higher than the height of the second end opening, or the height of the first end opening may be flush with the height of the second end opening.

[0040] In some embodiments of the present invention, reference Figure 1 and Figure 3 , the first channel 12a is opened along the first direction.

[0041] The first channel 12a is arranged along the first direction, that is, the height of the first end opening of the first channel 12a can be flush with the height of the second end opening, which is convenient for processing and setting, and convenient for passing the prestressed component 200, and at the same time, convenient for tensioning the prestressed component 200.

[0042] In some embodiments of the present invention, reference Figure 1 and Figure 4 The frame beam 11 is provided with a second hole 11a for passing the prestressed component 200 . An anchor 111 is provided on the side of the frame beam 11 away from the fixed reaction wall 12 and adjacent to the second hole 11a for fixing the prestressed component 200 .

[0043] By setting a second hole 11a in the frame beam 11, the prestressed component 200 is passed through the second hole 11a to guide the prestressed component 200, and an anchor 111 is set on the side of the frame beam 11 away from the fixed reaction wall 12 to fix the prestressed component 200 to the frame beam 11, so that when the prestressed component 200 is tensioned, the anchor 111 is not easy to separate from the fixed reaction wall 12, which is conducive to tensioning the prestressed component 200.

[0044] It is understandable that the second channel 11a can be arranged along the first direction, or along a direction forming a certain angle with the first direction. Preferably, the second channel 11a is arranged along the first direction.

[0045] The second hole 11a can be the same height as the first hole 12a along the height direction of the frame beam 11, or can be higher than the first hole 12a, or can be lower than the first hole 12a. Preferably, the second hole 11a is the same height as the first hole 12a along the height direction of the frame beam 11.

[0046] In some embodiments, the anchor 111 may also be disposed on the side of the frame beam 11 facing the fixed reaction wall 12 to fix the prestressed member 200 to the frame beam 11 on both sides of the frame beam 11, thereby further improving the connection strength.

[0047] The anchor 111 may also be provided only on one side of the frame beam 11 facing the fixed reaction wall 12. In this case, the frame beam 11 may be provided with the second hole 11a or may not be provided with the second hole 11a.

[0048] In some embodiments of the present invention, reference Figure 1 and Figure 5 The prestressed member 200 includes a tie rod 14 , one end of which is passed through the first hole 12 a and fixedly connected to the frame beam 11 , and the other end of which is used to connect the prestressed wire through a detachable connector 141 .

[0049] By setting the tie rod 14, one end of the tie rod 14 is matched with the first hole 12a and connected to the frame beam 11, and the other end is detachably connected to the prestressed wire, so that the tie rod 14 can be reused, reducing the engineering cost.

[0050] Specifically, the pull rod 14 and the prestressed wire can be connected by a threaded connection or a snap connection 141. Exemplarily, the pull rod 14 and the prestressed wire can be detachably connected by a steel strand connector.

[0051] In order to reduce the waste of the prestressed wire, the tie rod 14 is connected to the prestressed wire on the side of the fixed reaction wall 12 away from the frame beam 11 . In some embodiments of the present invention, reference Figure 1 , Figure 2 and Figure 5 The prestressed tensioning pedestal 100 further includes an inclined rod 15 , one end of which is connected to the fixed reaction wall 12 , and the other end of which is located on a side of the fixed reaction wall 12 facing the frame beam 11 and is connected to the base 30 .

[0052] By providing the inclined rod 15, the fixed reaction wall 12 is supported so that when the telescopic member 13 is extended, the fixed reaction wall 12 is not easily overturned by the thrust of the telescopic member 13, thereby improving the tensioning stability of the prestressed member 200.

[0053] It is understandable that one or more diagonal rods 15 may be provided. In the solution of the present application, two diagonal rods 15 are provided, and the two diagonal rods 15 are relatively arranged on the same side of the fixed reaction wall 12 .

[0054] In some embodiments, the diagonal rod 15 can also be arranged on the side of the fixed reaction wall 12 away from the frame beam 11; or, the diagonal rod 15 can also be arranged on the side of the fixed reaction wall 12 facing the frame beam 11 and the side away from the frame beam 11.

[0055] In some embodiments of the present invention, reference Figure 1 and Figure 6 The bottom tensioning group 20 includes a bottom plate frame beam 21 arranged between two fixed reaction walls 12, and the bottom plate frame beam 21 includes an upper beam 211 and a lower beam 212 arranged in parallel, and a plurality of support beams 213 respectively connected to the upper beam 211 and the lower beam 212 at both ends; a plurality of anchor blocks 214 are provided on one side of the upper beam 211 facing the lower beam 212.

[0056] The bottom plate frame beam 21 is provided, and a plurality of anchor blocks 214 are provided on the bottom plate frame beam 21 so that the other end of the prestressed member 200 can be anchored at the bottom.

[0057] The bottom frame beam 21 is used to support the small box beam. The bottom frame beam 21 includes an upper beam 211 and a lower beam 212 arranged in parallel, wherein the lower beam 212 is used to support the ground, and the upper beam 211 is used to support the small box beam. The parallel arrangement of the upper beam 211 and the lower beam 212 facilitates the support of the small box beam.

[0058] The support beam 213 is connected between the upper beam 211 and the lower beam 212 so as to form an operating space between the upper beam 211 and the lower beam 212 so as to anchor the prestressed member 200 in the operating space.

[0059] In some embodiments, a plurality of support beams 213 are arranged between the upper beam 211 and the lower beam 212 at intervals along the extension direction of the upper beam 211. It is understandable that the plurality of support beams 213 can be arranged at the same interval or at different intervals. Preferably, the plurality of support beams 213 are arranged at the same interval.

[0060] In some embodiments, the support beam 213 is connected to the upper beam 211 at a certain angle so that an operating space is formed between adjacent support beams 213. The angles between the multiple support beams 213 and the upper beam 211 may be the same or different. Preferably, the angles between the multiple support beams 213 and the upper beam 211 are the same. The angle between the support beam 213 and the upper beam 211 may be 30°-150°. Preferably, the angle between the support beam 213 and the upper beam 211 is 90°, that is, the support beam 213 is perpendicular to the upper beam 211. In order to improve the support effect, at the same time, increase the operating space and facilitate operation.

[0061] In some embodiments of the present invention, reference Figure 6 The upper beam 211 is provided with a third hole 211 a , and the anchor block 214 is provided with a fourth hole 214 a connected to the third hole 211 a . The third hole 211 a and the fourth hole 214 a are used for passing the prestressed member 200 .

[0062] The upper beam 211 and the anchor block 214 are provided with a third hole 211 a and a fourth hole 214 a connected to each other, so that the prestressed member 200 can be passed through to be anchored on the side of the upper beam 211 facing the lower beam 212 .

[0063] The third hole 211a may be perpendicular to the upper beam 211, or the third hole 211a may form a certain angle with the upper beam 211, for example, the third hole 211a may be consistent with the inclined direction of the prestressed member 200. Preferably, the third hole 211a is consistent with the inclined direction of the prestressed member 200.

[0064] The fourth hole 214a may be perpendicular to the upper beam 211, or the fourth hole 214a may form a certain angle with the upper beam 211, for example, the fourth hole 214a may be consistent with the inclination direction of the prestressed member 200. Preferably, the fourth hole 214a is consistent with the inclination direction of the prestressed member 200.

[0065] The opening of the fourth hole 214a at one end facing the third hole 211a may face the third hole 211a, or may be offset from the third hole 211a. Preferably, the opening of the fourth hole 214a at one end facing the third hole 211a may face the third hole 211a.

[0066] In some embodiments of the present invention, reference Figure 6 The bottom tensioning group 20 also includes a bottom panel 22 , which is connected to the side of the upper beam 211 away from the lower beam 212 ; the bottom panel 22 is provided with a fifth hole 22 a , which is used to pass the prestressed member 200 .

[0067] The bottom panel 22 can provide support and serve as a bottom template when pouring concrete to prevent concrete from leaking. A fifth hole 22a is provided in the bottom panel 22 so that the prestressed member 200 can pass through the bottom panel 22.

[0068] The bottom plate 22 can be fixedly connected to the bottom plate frame beam 21. The bottom tensioning group 20 can be reused, which reduces the construction cost.

[0069] In some embodiments, the bottom plate frame beam 21 may be a reinforced concrete structure, and the bottom panel 22 may be a steel panel.

[0070] The construction method of prestressing a prestressed member by pre-tensioning the prestressed member using the prestressing pedestal in the above embodiment comprises the following steps: Step 1: Construction preparation: specifically including pouring the base, fixing the reaction wall, bottom plate frame beam, etc., installing frame beams, retractable parts, tie rods, etc.; Step 2: Cutting and installing the prestressed wire; Step 3: Initial prestressing, with a single prestressing force lower than 50% of the prestressing control force; Step 4: Tie the prestressed wires of the bottom plate and web of the precast beam; Step 5: Install the inner and outer molds of the precast beams and tie the top plate reinforcement; Step 6: Final tensioning of the prestressed wire, tensioning in batches to 100% tensioning control stress, symmetrical tensioning of the prestressed parts, and tensioning construction by double control of tensioning force and elongation value. The tensioning sequence is to first tension the prestressed parts from top to bottom in the bottom plate, and then tension the prestressed parts from top to bottom in the web plate; Step 7: pouring concrete and curing; Step 8: Remove the inner and outer formwork; Step 9, tensioning: tension the steel strands symmetrically, evenly, and slowly in batches. The tensioning sequence is opposite to the tensioning sequence. The jack slowly returns the oil to make the jack retreat. The tensioning is completed in batches and the anchors at the fixed end are removed. Step 10: Remove from the trough, lift, stack, inspect and seal the ends.

[0071] In some embodiments, a failure section may be provided for the prestressed member in the bottom plate of the small box girder.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 prestressed tensioning pedestal, characterized in that: include: An end tensioning group, the end tensioning group comprising two frame beams, the two frame beams are arranged opposite to each other along a first direction, and are used to anchor one end of the oblique prestressed member; A bottom tensioning group is arranged between the two frame beams, and the bottom tensioning group is provided with a plurality of anchoring blocks for anchoring the other end of the oblique prestressed member.

2. The prestressed tensioning pedestal according to claim 1, characterized in that: The end tensioning group also includes: Two fixed reaction walls, the two fixed reaction walls are respectively arranged on the sides of the two frame beams facing each other and fixed to the base, and the fixed reaction walls are provided with a first hole for passing the prestressed member; The frame beam is movably arranged on the base; A retractable member, wherein the fixed end and the retractable end of the retractable member are respectively connected to the fixed reaction wall and the frame beam to change the distance between the fixed reaction wall and the frame beam.

3. The prestressed tensioning pedestal according to claim 2, characterized in that: The first end opening of the first channel faces away from the frame beam, and the second end opening faces the frame beam. Along the height direction of the fixed reaction wall, the height of the first end opening is not lower than the height of the second end opening.

4. The prestressed tensioning pedestal according to claim 3, characterized in that: The first channel is opened along a first direction.

5. The prestressed tensioning pedestal according to claim 1, characterized in that: The frame beam is provided with a second hole for passing the prestressed component. An anchor is provided on the side of the frame beam away from the fixed reaction wall and adjacent to the second hole for fixing the prestressed component.

6. The prestressed tensioning pedestal according to claim 2, characterized in that: The prestressed member comprises a pull rod, one end of which is passed through the first hole and fixedly connected to the frame beam, and the other end of which is used to connect the prestressed wire via a detachable connector.

7. The prestressed tensioning pedestal according to claim 2, characterized in that: It also includes an oblique rod, one end of which is connected to the fixed reaction wall, and the other end of which is located on a side of the fixed reaction wall facing the frame beam and connected to the base.

8. The prestressed tensioning pedestal according to claim 2, characterized in that: The bottom tensioning group includes a bottom plate frame beam arranged between the two fixed reaction walls, the bottom plate frame beam includes an upper beam and a lower beam arranged in parallel, and a plurality of support beams respectively connected to the upper beam and the lower beam at both ends; A plurality of anchor blocks are provided on one side of the upper beam facing the lower beam.

9. The prestressed tensioning pedestal according to claim 8, characterized in that: The upper beam is provided with a third hole, the anchor block is provided with a fourth hole connected with the third hole, and the third hole and the fourth hole are used for passing the prestressed member.

10. The prestressed tensioning pedestal according to claim 6, characterized in that: The bottom tensioning group further includes a bottom panel connected to a side of the upper beam facing away from the lower beam; The bottom panel is provided with a fifth hole, and the fifth hole is used for passing the prestressed member.

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