CN220389822U - Common pedestal for pretensioned I-beams by fold line method - Google Patents

Abstract

The pedestal sharing technology is realized by the disclosed fold line method pretensioned I-beam sharing pedestal, and comprises a pedestal base body and pile foundations arranged at the bottom of the pedestal base body, wherein counter-force walls, beam end bogies and anchoring devices are arranged on two sides of the pedestal base body, and the anchoring devices and the counter-force walls are oppositely pulled through pull rods; the middle part of the pedestal base body is provided with an inter-beam bogie, the folding line pretensioned I-beam sharing pedestal also comprises a first pre-stress beam and a second pre-stress beam, one end of the first pre-stress beam passes through the beam end bogie at one side of the pedestal base body and is connected with the anchoring device, the other end of the first pre-stress beam is connected with the inter-beam bogie, one end of the second pre-stress beam passes through the beam end bogie at the other side of the pedestal base body and is connected with the anchoring device, and the other end of the second pre-stress beam is connected with the inter-beam bogie; the inter-beam bogie and the two beam end bogies comprise a lower fixing section and a plurality of upper adjusting sections for replacement, and the lower fixing section is detachably connected with one of the upper adjusting sections.

Description

Common pedestal for pretensioned I-beams by fold line method

Technical Field

The application relates to the field of bridge construction, in particular to a folding line method pre-tensioning I-beam sharing pedestal.

Background

Pretensioned construction refers to tensioning a prestress beam before pouring a concrete member, temporarily anchoring the prestress beam on a girder-making pedestal, pouring the concrete member, and releasing prestress when enough binding force exists between the prestress beam and the concrete after the concrete reaches a certain strength, wherein the prestress beam elastically retracts, and generating prestress on the concrete by means of binding between the concrete and the prestress beam. The pretensioning method can omit the working procedures of reserving pore channels, grouting and the like, and has even prestress distribution and good beam durability. Because of limited construction sites, the existing tensioning pedestal can only manufacture one I-beam and cannot manufacture a plurality of I-beams at the same time; when a plurality of I-beams are manufactured, the problem of different bending heights of the prestressed beams can occur due to different beam lengths; for example, when a 20m I-beam is prefabricated by a 25m pedestal, the distance from the beam end to the bogie becomes large, and the height of the connecting position of the prestress beam and the bogie is also increased.

Disclosure of Invention

The application aims at solving at least one of the technical problems existing in the prior art, and therefore the application provides a folding line method pre-tensioning I-beam sharing pedestal.

The utility model provides a broken line method pretensioned I-beam sharing pedestal, includes the pedestal base member and sets up in the pile foundation of pedestal base member bottom, the both sides of pedestal base member all are provided with counter-force wall, beam end bogie and anchor, anchor with counter-force wall is through the counter-pulling screw rod to drawing; the middle part of the pedestal base body is provided with an inter-beam bogie, the folding line method pre-tensioning I-beam sharing pedestal further comprises a first pre-stressing beam and a second pre-stressing beam, one end of the first pre-stressing beam penetrates through the beam end bogie at one side of the pedestal base body to be connected with the anchoring device, the other end of the first pre-stressing beam is connected with the inter-beam bogie, one end of the second pre-stressing beam penetrates through the beam end bogie at the other side of the pedestal base body to be connected with the anchoring device, and the other end of the second pre-stressing beam is connected with the inter-beam bogie; the inter-beam bogie and the two beam end bogies comprise a lower fixed section and a plurality of upper adjusting sections which are used for replacement and have different heights, and the lower fixed section is detachably connected with one of the upper adjusting sections.

Further specifically, in the above technical scheme, the first pre-stressing beam and the second pre-stressing beam each include a bending beam and a straight beam, the bending beam is connected with the upper adjusting section, and the straight beam is connected with the lower fixing section.

In the technical scheme, the lower fixing section is connected with the upper adjusting section through a flange plate.

Further specifically, in the above technical scheme, the upper adjusting section is provided with the roller through the connecting shaft, a limit groove is formed in the circumferential surface of the roller, and the bending beam is connected with the limit groove.

Further specifically, in the above technical scheme, the beam-end bogie all includes the link of buckling and changes the horizontal link, the one end of buckling restraint earlier with the top of gyro wheel in the link of buckling is connected, then with the bottom of changeing the gyro wheel in the horizontal link, anchor is provided with the anchor hole, the height of changeing the bottom of gyro wheel in the horizontal link with the height of anchor hole is unanimous.

More specifically, in the above technical solution, a bending device is disposed at a bending position of the bending beam.

Further specifically, in the above technical scheme, the bending device comprises a base, a connector, a pull rod and a bending device, wherein the base is fixedly connected with the base body of the pedestal, the connector is rotationally connected with the base, one end of the pull rod is connected with the connector, and the other end of the pull rod is connected with the bending device.

Further specifically, in the above technical scheme, the base is fixedly connected with the pedestal base body through the embedded bolt, and the bottom of the embedded bolt is provided with the flanging structure.

Further specifically, in the above technical scheme, the counter-force wall includes the back wall, back wall both sides are provided with the earwall, anchor is located between two earwalls, the pull rod with the back wall is connected.

Further specifically, in the above technical solution, the lower fixing section is fixed to the pedestal base body through an anchor plate and an anchor bar.

Compared with the prior art, the embodiment of the application has the following beneficial effects:

according to the method, the pedestal can simultaneously manufacture a plurality of I-beams in a limited field by using the pedestal sharing technology; the bending height of the prestress beam can be adapted by changing the up-regulating sections with different heights, so that the problem of different bending heights of the prestress beam is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of the present application;

FIG. 2 is a schematic view of a structure of the pedestal base of the present application;

FIG. 3 is an enlarged schematic view of the other side of the base of the stand of the present application;

FIG. 4 is a schematic view of a configuration of the connecting shaft and roller of the present application;

fig. 5 is a schematic view of a structure of the bending device of the present application.

In the figure: 1. a pedestal base; 2. pile foundation; 3. a reaction wall; 301. a back wall; 302. an ear wall; 4. a beam end bogie; 401. bending the connecting frame; 402. a horizontal connecting frame is rotated; 5. an anchoring device; 6. a counter-pulling screw; 7. an inter-beam bogie; 8. a first pre-stress beam; 9. a second pre-stress beam; 901. bending the bundle; 902. a wire bundle; 10. a flange plate; 11. a connecting shaft; 12. a roller; 1201. a limit groove; 13. a bending device; 1301. a base; 1302. a connector; 1303. a pull rod; 1304. a bending device; 1305. embedding bolts; 13051. a flanging structure; 14. an anchor plate; 15. and (5) anchor bars.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that references to orientation descriptions, such as directions of up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical solution.

In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Referring to fig. 1, the application provides a folding line pretensioned i-beam sharing pedestal, which comprises a pedestal base body 1 and pile foundations 2 arranged at the bottom of the pedestal base body 1, wherein counter-force walls 3, beam end bogies 4 and an anchoring device 5 are arranged on two sides of the pedestal base body 1, and the anchoring device 5 and the counter-force walls 3 are oppositely pulled through counter-pulling screws 6; the middle part of the pedestal base body 1 is provided with an inter-beam bogie 7, the zigzag-method pre-tensioning I-beam sharing pedestal also comprises a first prestress beam 8 and a second prestress beam 9, one end of the first prestress beam 8 penetrates through the beam end bogie 4 at one side of the pedestal base body 1 to be connected with the anchoring device 5, the other end of the first prestress beam 8 is connected with the inter-beam bogie 7, one end of the second prestress beam 9 penetrates through the beam end bogie 4 at the other side of the pedestal base body 1 to be connected with the anchoring device 5, and the other end of the second prestress beam 9 is connected with the inter-beam bogie 7; the inter-beam bogie 7 and the two beam-end bogies 4 each comprise a lower fixed section and a plurality of upper adjusting sections which are used for replacement and have different heights, and the lower fixed section is detachably connected with one of the upper adjusting sections.

This application sets up equipment such as counter-force wall 3, beam end bogie 4 and anchor 5 through the both sides at pedestal base member 1, sets up inter-beam bogie 7 at the middle part of pedestal base member 1, and the rethread above-mentioned component is connected with first prestressing force beam 8 and second prestressing force beam 9, realizes the sharing technique of pedestal for the pedestal can make two I-beams simultaneously in limited place.

Optionally, the pedestal base body 1 solves the problems of pulling resistance and bearing of the stretching end of the pedestal through the anchor rod and the prestressed pipe pile, and counteracts stretching horizontal force by integrally embedding the pedestal into the rock stratum.

Because the pedestal shares, for example 35m long pedestal when prefabricating 30m I-beam, the distance between beam end and bogie increases, and the prestressing force beam can improve through beam end bogie 4 or the height of inter-beam bogie 7, through changing different upper adjusting section, can adapt the bending height of prestressing force beam, solves the problem that prestressing force beam bending height is different. As described below, the roller height of each up-regulation segment is different to solve the problem of different pre-stress beam bending heights.

The first prestress beam 8 penetrates through the beam end bogie 4 and the second prestress beam 9 is fixedly connected with the anchoring device 5, and the prestress effect is achieved by opposite pulling of the opposite pulling screw 6.

It will be appreciated that fig. 3 shows an enlarged schematic view of the other side of the pedestal base 1, and an enlarged schematic view of the one side of the pedestal base 1 is the same as the whole.

In some embodiments, as shown in fig. 3, the first pre-stress beam 8 and the second pre-stress beam 9 each include a bending beam 901 and a straight beam 902, the bending beam 901 is connected to the upper adjusting section, and the straight beam 902 is connected to the lower fixing section, and it should be noted that only a partial schematic structure of the second pre-stress beam 9 is shown in fig. 3, and the first pre-stress beam 8 also includes the bending beam 901 and the straight beam 902.

In some embodiments, as shown in fig. 3, the lower fixed section is connected with the upper adjusting section through a flange plate 10, so as to achieve the detachable effect of the upper adjusting section.

In some embodiments, as shown in fig. 3-4, the upper adjusting section is provided with a roller 12 through a connecting shaft 11, a limit groove 1201 is formed on the circumferential surface of the roller 12, and the bending beam 901 is connected with the limit groove 1201. The connecting shaft 11 is rotatably sleeved with a roller 12, a limiting groove 1201 is formed in the circumferential surface of the roller 12, and the bending beam 901 is movably accommodated in the limiting groove 1201.

The structure of the rollers 12 on the beam-to-beam bogie 7 and the beam-end bogie 4 is the same, each upper adjusting section is provided with the rollers 12 at the corresponding height, and the rollers 12 with different heights can be conveniently replaced and adapted through a plurality of upper adjusting sections; as shown in fig. 4, the connecting shaft 11 on the inter-beam bogie 7 may be provided with two rollers 12 to accommodate the first and second pre-stressing beams 8 and 9 at the same height.

In some embodiments, as shown in fig. 3, the beam-end bogies 4 each include a bending connection frame 401 and a horizontal rotation connection frame 402, one end of the bending beam 901 is connected to the top of the roller 12 in the bending connection frame 401, then connected to the bottom of the roller 12 in the horizontal rotation connection frame 402, and the anchoring device 5 is provided with an anchoring hole (not shown), and the height of the bottom of the roller 12 in the horizontal rotation connection frame 402 is consistent with the height of the anchoring hole, so as to ensure that the connecting anchoring device 5 is flush, so that the stress beam is on the same level as possible, whether the long beam or the short beam is prefabricated.

The horizontal property and consistency of the prestress application are ensured, and the displacement of one end of the prestress beam connected with the anchoring device 5 in the vertical direction is avoided, so that the stability and the stress performance of the I-beam are ensured.

Since the pedestals are shared, the number of prestressing tendons used by different i-beams is also different, so the anchoring device 5 can correspond to a plurality of reserved anchoring holes.

In some embodiments, as shown in fig. 1, a bending device 13 is disposed at the bending position of the bending beam 901, and by using the bending device 13, the prestress beam can maintain a proper stress state at the bending position without excessive stretching or relaxation, so that effective transmission of prestress is ensured.

In some embodiments, as shown in fig. 5, the bending device 13 includes a base 1301, a connector 1302, a pull rod 1303, and a bending device 1304, where the base 1301 is fixedly connected to the base body 1, the connector 1302 is rotatably connected to the base 1301, one end of the pull rod 1303 is connected to the connector 1302, and the other end is connected to the bending device 1304.

Preferably, the bending device 1304 adopts a roller 12 structure with an inner sleeve and a self-lubricating copper sleeve, so that the prestress loss of the prestress beam can be effectively reduced, and the free steering of the prestress beam is realized; the bending device 1304 is connected with the base 1301 through a pull rod 1303 and a connector 1302, the base 1301 is anchored on the base body 1, and the self weight of the base body 1 is utilized to counteract the pulling-up force of the bending device 1304 during tensioning.

Optionally, the top end of the base 1301 is hinged to the lower end of the connector 1302 through a shaft pin, and the upper end and the lower end of the pull rod 1303 are detachably connected with the bending device 1304 and the upper end of the connector 1302 respectively; the connection devices such as the base 1301, the connector 1302, and the pull rod 1303 can be reused. The bending starting points of 30m and 35m are identical, and the bending starting points of 30m and 35m are identical, so that a plurality of bending starting points do not need to be considered.

In some embodiments, as shown in fig. 5, the base 1301 is fixedly connected to the base body 1 through a pre-buried bolt 1305, and a flanging structure 13051 is provided at the bottom of the pre-buried bolt 1305.

By adopting the mode of fixing the embedded bolts 1305 with the pedestal base body 1, the connection between the pedestal 1301 and the pedestal base body 1 is firmer and more stable. The embedded bolt 1305 is a bolt which is installed in advance in the pedestal base 1, is fixed in a concrete structure and is integrated with the base, so that the tension and the pressure generated when the prestress is applied can be effectively resisted, loosening or displacement of a connecting part is avoided, and the stability and the safety of the pedestal are ensured. An anchoring effect is created by the flanging 13051, which is better fixed in the pedestal base 1.

In some embodiments, as shown in fig. 2, the counter-force wall 3 includes a back wall 301, two sides of the back wall 301 are provided with ear walls 302, the anchoring device 5 is located between the two ear walls 302, and the tie rod 1303 is connected to the back wall 301.

Optionally, the counter-force wall 3 is poured by C50 concrete, the elevation of the embedded traction pipe is strictly controlled in the pouring process, and the designed elevation position of the embedded steel plate and the verticality and flatness of the counter-force wall 3 are strictly controlled.

In some embodiments, as shown in fig. 3, the lower securing section is secured to the pedestal base 1 by anchor plates 14 and anchor bars 15. The anchor plate 14 and the anchor bar 15 are fixed in the pedestal base body 1, can effectively bear the tensile force of the prestress beam, keep the tight connection of the lower fixing section and the pedestal base body 1, avoid loosening or displacement, and ensure the prestress transmission and application effect.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. The utility model provides a broken line method pretensioned I-beam sharing pedestal, includes the pedestal base member and sets up in the pile foundation of pedestal base member bottom, its characterized in that, the both sides of pedestal base member all are provided with counter-force wall, beam end bogie and anchor, anchor with counter-force wall is through the counter-pulling screw rod to drawing; the middle part of the pedestal base body is provided with an inter-beam bogie, the folding line method pre-tensioning I-beam sharing pedestal further comprises a first pre-stressing beam and a second pre-stressing beam, one end of the first pre-stressing beam penetrates through the beam end bogie at one side of the pedestal base body to be connected with the anchoring device, the other end of the first pre-stressing beam is connected with the inter-beam bogie, one end of the second pre-stressing beam penetrates through the beam end bogie at the other side of the pedestal base body to be connected with the anchoring device, and the other end of the second pre-stressing beam is connected with the inter-beam bogie; the inter-beam bogie and the two beam end bogies comprise a lower fixed section and a plurality of upper adjusting sections which are used for replacement and have different heights, and the lower fixed section is detachably connected with one of the upper adjusting sections.

2. The broken line pre-tensioning i-beam sharing mount according to claim 1, wherein the first pre-stressing beam and the second pre-stressing beam each comprise a bending beam and a straight beam, the bending beam being connected to the upper adjustment section, the straight beam being connected to the lower fixing section.

3. The folding-line-method h-beam sharing mount according to claim 2, wherein the lower fixing section and the upper adjusting section are connected by a flange plate.

4. The common pedestal for the pre-tensioning I-beams according to the folding line method according to claim 2, wherein the upper adjusting section is provided with a roller through a connecting shaft, a limit groove is formed on the circumferential surface of the roller, and the bending beam is connected with the limit groove.

5. The h-beam sharing pedestal according to claim 4, wherein the beam-end bogies each comprise a bending connecting frame and a horizontal turning connecting frame, one end of the bending beam is connected with the top of the roller in the bending connecting frame and then connected with the bottom of the roller in the horizontal turning connecting frame, the anchoring device is provided with an anchoring hole, and the height of the bottom of the roller in the horizontal turning connecting frame is identical to the height of the anchoring hole.

6. The bending-line pre-beam common pedestal according to claim 2, wherein a bending-up device is provided at a bending-up position of the bending-up beam.

7. The bending-line pre-tensioning i-beam sharing pedestal according to claim 6, wherein the bending-up device comprises a base, a connector, a pull rod and a bending-up device, wherein the base is fixedly connected with the pedestal base, the connector is rotatably connected with the base, one end of the pull rod is connected with the connector, and the other end of the pull rod is connected with the bending-up device.

8. The folding-line-method pre-tensioning I-beam sharing pedestal according to claim 7, wherein the pedestal is fixedly connected with the pedestal base body through an embedded bolt, and a flanging structure is arranged at the bottom of the embedded bolt.

9. The folding h-beam sharing pedestal according to claim 7, wherein the reaction wall comprises a back wall, two sides of the back wall are provided with ear walls, the anchoring device is located between the two ear walls, and the pull rod is connected with the back wall.

10. The folding-line-method pre-h-beam sharing deck of claim 1, wherein said lower securing section is secured to said deck base by anchor plates and tendons.