CN114892493A - Prestressed concrete T-shaped beam with green building characteristics - Google Patents
Prestressed concrete T-shaped beam with green building characteristics Download PDFInfo
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- CN114892493A CN114892493A CN202210412888.4A CN202210412888A CN114892493A CN 114892493 A CN114892493 A CN 114892493A CN 202210412888 A CN202210412888 A CN 202210412888A CN 114892493 A CN114892493 A CN 114892493A
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- rotary drum
- tensioning
- column
- shaped beam
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- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 53
- 210000002435 tendon Anatomy 0.000 claims abstract description 71
- 239000004567 concrete Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Abstract
The application relates to a prestressed concrete T-shaped beam with green building characteristics, which is applied to the field of concrete beams and comprises a web plate, wherein a through groove for inserting a pushing piece is formed in the web plate along the length direction of the web plate, a plurality of sliding grooves are also formed in the web plate, the plurality of sliding grooves are uniformly distributed along the length direction of the web plate, the plurality of sliding grooves are parallel to each other and are communicated with the through groove, and the central axis of each sliding groove is perpendicular to the central axis of the through groove; the tensioning piece is arranged in the sliding groove in a sliding mode, the end, far away from the through groove, of the tensioning piece is fixed with the prestressed tendon, the end, far away from the prestressed tendon, of the tensioning piece is arranged in the through groove, and when the pushing piece is inserted into the through groove, the pushing piece pushes the tensioning piece to move along the sliding groove towards the direction far away from the through groove. The method has the effect of increasing the tensioning range of the prestressed tendons, so that the adjustable range of the prestress applied to the prestressed concrete T-shaped beam is enlarged.
Description
Technical Field
The application relates to the technical field of concrete beams, in particular to a prestressed concrete T-shaped beam with green building characteristics.
Background
The prestressed T-shaped beam finger beam is provided with prestressed tendons, and the cross section of the prestressed T-shaped beam finger beam is in a T shape. A beam bridge with a bearing structure formed by combining an upper flange and a beam rib of reinforced concrete is called a T-shaped beam bridge, and is named due to the fact that the section shape of a main beam is like an English letter T. The pressure zone of the cross section of the T-shaped beam is made into a flange plate by using pressure-resistant concrete and also serves as a bridge floor; the tension zone pre-stresses the beam with pre-stressed tendons.
In the related technology, a post-tensioning method is generally adopted to manufacture a prestressed concrete T-shaped beam, the prestressed concrete T-shaped beam is manufactured firstly, corresponding pore channels are reserved in the prestressed concrete T-shaped beam according to the positions of prestressed tendons, after the concrete strength of the prestressed concrete T-shaped beam reaches the specified strength, the prestressed tendons are penetrated into the reserved pore channels for tensioning, the tensioned prestressed tendons are anchored at the end part of the prestressed concrete T-shaped beam by using an anchorage device, and the pretensioning force of the prestressed tendons is transmitted to concrete by depending on the anchorage device at the end part of the prestressed concrete T-shaped beam so as to generate the pre-tensioning stress; and finally, pouring cement slurry into the pore channel to enable the prestressed tendons and the prestressed concrete T-shaped beam to form a whole.
Aiming at the related technologies, the inventor finds that the prestressed tendons are tensioned along the length direction of the prestressed concrete T-shaped beam, the prestressed tendons can be tensioned to be parallel to the axis of the prestressed concrete T-shaped beam, the tensioning range of the prestressed tendons is small, and therefore the adjustable range of the prestress applied to the prestressed concrete T-shaped beam is small.
Disclosure of Invention
In order to solve the problem that the prestress applied to the prestressed concrete T-shaped beam by the prestressed tendons is insufficient, the prestressed concrete T-shaped beam with the green building characteristic is provided.
The application provides a prestressed concrete T type roof beam that possesses green architectural characteristic adopts following technical scheme:
a prestressed concrete T-shaped beam with green building characteristics comprises a web plate, wherein a through groove for inserting a pushing piece is formed in the web plate along the length direction of the web plate, a plurality of sliding grooves are formed in the web plate and are uniformly distributed along the length direction of the web plate, the sliding grooves are parallel to each other and are communicated with the through groove, and the central axis of the sliding grooves is perpendicular to the central axis of the through groove;
the sliding groove is internally provided with a tensioning piece in a sliding mode, one end, far away from the through groove, of the tensioning piece is fixedly provided with a prestressed tendon, one end, far away from the prestressed tendon, of the tensioning piece is arranged in the through groove, and when the pushing piece is inserted in the through groove, the pushing piece pushes the tensioning piece to move along the sliding groove towards the direction far away from the through groove.
Through adopting above-mentioned technical scheme, set up logical groove along the length direction of web, insert the ejecting piece and establish to leading to the inslot back, a plurality of tensioning pieces are pushed away the top of piece and are pushed away under and slide and the pulling prestressed tendons in the spout that corresponds to realize the further stretch-draw to the prestressed tendons, can increase the stretch-draw scope of prestressed tendons, the adjustment ejecting piece can adjust the prestressing force that prestressed concrete T type roof beam received.
Optionally, the pushing member includes a rotating drum and a pushing rod, the pushing rod is slidably disposed in the rotating drum, the rotating drum is provided with a plurality of connecting holes communicated with the sliding groove, the pushing rod is provided with a plurality of protrusions, and the protrusions push the tensioning member to move along the sliding groove in a direction away from the through groove.
Through adopting above-mentioned technical scheme, set up the rotary drum at logical inslot, the one end of tensioning piece is inserted through the connecting hole and is established on the rotary drum, then inserts the ejector pin in the rotary drum, and protruding top pushing tensioning piece passes the connecting hole and gets into the spout towards the removal of keeping away from the direction that leads to the groove, and a plurality of tensioning pieces carry out even stretch-draw to the prestressed reinforcement, and the prestressing force that prestressed concrete T type roof beam received can be adjusted to the bellied thickness of adjustment.
Optionally, a guide ring is fixed on the periphery of the protrusion, and the guide ring extends to the ejector rod from the protrusion back to the end face periphery of the ejector rod towards the direction away from the protrusion.
By adopting the technical scheme, the guide ring forms a slope surface between the end surface of the protrusion and the side wall of the push rod, on one hand, the protrusion is favorable for moving to the end surface of the tensioning piece far away from the prestressed tendon to push the tensioning piece, so that the prestressed tendon is conveniently tensioned to improve the bearing capacity of the prestressed concrete T-shaped beam; on the other hand, the tensioning piece can slide over the protrusion which enters the through groove firstly along the guide ring and is pushed by the corresponding protrusion, so that the situation that the pushing rod is difficult to insert into the through groove due to the fact that the tensioning piece blocks the protrusion is reduced.
Optionally, a plurality of limiting plates are fixed on the side wall of the ejector rod along the length direction of the ejector rod, a plurality of limiting grooves corresponding to the limiting plates one to one are formed in the inner wall of the rotary drum, and when the ejector is inserted in the through grooves, the limiting plates are inserted in the limiting grooves.
By adopting the technical scheme, when the ejector rod is inserted into the rotary drum, the limiting plate is inserted into the limiting groove to limit and guide the ejector rod, so that the protrusion always faces the direction of the tensioning piece and pushes the corresponding tensioning pieces respectively, and the limiting plate and the limiting groove are arranged to reduce the condition that the protrusion does not push the tensioning piece due to the fact that the ejector rod rotates in the rotary drum.
Optionally, the tensioning member includes an abutting column and a tensioning column slidably disposed in the sliding groove, the abutting column and the tensioning column are coaxially disposed, one end of the abutting column abuts against the protrusion, the other end of the abutting column abuts against the tensioning column, and one end of the tensioning column, which is far away from the abutting column, is fixed to the prestressed tendon;
when the pushing piece is inserted into the through groove, the tensioning column is located in the sliding groove, and the abutting column is located in the rotary drum.
By adopting the technical scheme, the tensioning piece is composed of the abutting column and the tensioning column, after the pushing piece is inserted into the through groove, the abutting column is pushed by the protrusion, the tensioning column is pushed by the abutting column and forms tensioning on the prestressed tendon, the tensioning column is located in the sliding groove by taking the connecting hole as a boundary, the abutting column is arranged in the rotary drum, the rotary drum rotates in the through groove by taking the central axis of the rotary drum as a shaft, and the abutting column rotates along with the rotary drum. And the one end that stretch-draw post kept away from the prestressing tendons then supports pastes on the rotary drum, and this makes what stretch-draw post can be firm fix carry out lasting and stable stretch-draw to the prestressing tendons in the spout, reducible stretch-draw post with support the post and slide in the spout and lead to the unstable condition of stretch-draw to the prestressing tendons.
Optionally, a plurality of roller shafts are rotatably connected to the inner wall of the through groove, the central axes of the roller shafts are parallel to the central axis of the rotary drum, and the roller shafts are attached to the wall of the rotary drum;
when the rotary drum rotates in the through groove by taking the central axis of the rotary drum as an axis, one end of the tensioning column, which is far away from the prestressed tendon, is attached to the outer wall of the rotary drum.
By adopting the technical scheme, after the pushing piece is inserted into the rotary drum, the tensioning column slides out of the rotary drum and slides into the sliding groove under the pushing action of the abutting column, the abutting column is arranged in the rotary drum, the rotary drum can rotate in the through groove by taking the central axis of the rotary drum as a shaft, and the abutting column rotates away from the tensioning column along with the rotary drum. The roller shaft rotates on the wall of the rotary drum by taking the central axis of the roller shaft as a shaft and rolls along with the rotation of the rotary drum, so that the situation that the damage is caused by overlarge friction force between the rotary drum and the wall of the through groove is reduced.
Optionally, a spring is fixed at one end of the tensioning column, which is far away from the abutting column, and one end of the spring, which is far away from the tensioning column, is fixed on the prestressed tendon.
By adopting the technical scheme, the spring is fixed between the prestressed tendon and the tensioning column, the tensioning column is pushed out of the rotary drum to move towards the prestressed tendon by abutting against the column top, and the spring is compressed by the pushing of the tensioning column. After the rotary drum is rotated, one end of the tensioning column is abutted against the inner wall of the rotary drum, the other end of the tensioning column is continuously pushed and pulled by the spring, the spring continuously stretches the prestressed tendon for overcoming elastic deformation, and compared with the method that the tensioning column directly stretches the prestressed tendon, the spring stretches the prestressed tendon and can attach the elasticity of the spring outside the thrust of the tensioning column, so that the tensioning range of the prestressed tendon is enlarged, and the adjustable range of the prestress applied to the prestressed concrete T-shaped beam is larger.
Optionally, a fixing groove is formed in a groove wall of the through groove, which is far away from the sliding groove, and when the rotary drum rotates to the position where the protrusion faces away from the sliding groove, the abutting column is inserted into the fixing groove.
Through adopting above-mentioned technical scheme, after the rotary drum uses the axis of rotary drum as the rotatory half cycle of axle at logical inslot, the connecting hole spout dorsad, support the post by the connecting hole roll-off and slide in the fixed slot under the action of gravity, support the post this moment and become spacingly to the rotary drum, can reduce the rotary drum and slide or pivoted possibility in logical inslot, fix the rotary drum at logical inslot firmly, reduce the rotary drum and slide or rotate and influence the possibility of prestressed concrete T type roof beam wholeness in logical inslot.
Optionally, a telescopic rod is slidably disposed in the abutting column, the telescopic rod and the abutting column are coaxially disposed, when the rotating drum rotates to the protrusion and faces away from the sliding groove, the telescopic rod is inserted into the fixing groove, and the abutting column is located in the rotating drum.
Through adopting above-mentioned technical scheme, when the rotary drum rotated to protruding spout dorsad, the telescopic link was inserted and is established to the fixed slot in, and supports the post and then stays in the rotary drum, and the reducible post that supports of this structure slides in the fixed slot completely and the condition that became invalid.
Optionally, a placing cavity is formed in the tensioning column, a rolling ball is arranged in the placing cavity, an extending opening is formed in one end, far away from the prestressed rib, of the tensioning column, a clamping ring is annularly arranged on the periphery of the extending opening along the auxiliary block, the clamping ring is attached to the rolling ball, and when the rotary drum rotates in the through groove, the rolling ball rotates on the rotary drum.
Through adopting above-mentioned technical scheme, it is spacing to the spin formation to stop the ring for the spin can't break away from and place the chamber, and the tensioning post is relieved through spin and rotary drum, and the spin rolls along with the rotary drum when the rotary drum rotates, and this is favorable to reducing the too big condition that leads to damaging or tensioning post slope of frictional force between tensioning post and the rotary drum.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the through grooves are formed in the length direction of the web plate, after the pushing piece is inserted into the through grooves, the plurality of tensioning pieces slide in the corresponding sliding grooves under the pushing action of the pushing piece and pull the prestressed tendons, so that the prestressed tendons are further tensioned, the tensioning range of the prestressed tendons can be enlarged, and the prestress borne by the prestressed concrete T-shaped beam can be adjusted by adjusting the pushing piece;
2. a rotary drum is arranged in the through groove, one end of a tensioning piece is inserted on the rotary drum through a connecting hole, then a push rod is inserted into the rotary drum, a protrusion pushes the tensioning piece to penetrate through the connecting hole to enter the sliding groove to move towards the direction far away from the through groove, a plurality of tensioning pieces uniformly tension the prestressed reinforcement, and the prestress borne by the prestressed concrete T-shaped beam can be adjusted by adjusting the thickness of the protrusion;
3. the pushing and pushing piece is inserted into the through groove, the pushing and pushing piece is pushed by the protrusion, the tensioning column is pushed by the pushing and pushing piece and forms tensioning on the prestressed tendon, the tensioning column is located in the sliding groove with the connecting hole as a boundary, the pushing and pulling column is arranged in the rotary drum, the rotary drum rotates in the through groove with the central axis of the rotary drum as a shaft, and the pushing and pushing piece rotates along with the rotary drum. And the one end that stretch-draw post kept away from the prestressing tendons then supports pastes on the rotary drum, and this makes what stretch-draw post can be firm fix carry out lasting and stable stretch-draw to the prestressing tendons in the spout, reducible stretch-draw post with support the post and slide in the spout and lead to the unstable condition of stretch-draw to the prestressing tendons.
Drawings
Fig. 1 is a schematic view of a prestressed concrete T-beam in an embodiment of the present application.
Fig. 2 is a sectional view of a prestressed concrete T-beam in the embodiment of the present application.
Fig. 3 is a partial sectional view of a prestressed concrete T-beam in an embodiment of the present application.
Fig. 4 is a partial schematic view of an ejector pin in an embodiment of the present application.
Fig. 5 is a cross-sectional view of a tension member of the present application.
Fig. 6 is a cross-sectional view of a web in an embodiment of the present application.
Fig. 7 is a sectional view of a prestressed concrete T-beam in use according to an embodiment of the present application.
Reference numerals: 1. a web; 2. prestressed tendons; 3. a through groove; 31. fixing grooves; 32. a groove; 4. a chute; 5. pushing the piece; 51. a rotating drum; 511. connecting holes; 512. a limiting groove; 52. pushing the push rod; 521. a protrusion; 522. a guide ring; 523. a limiting plate; 524. a shaft body; 525. accessing a head; 6. a tension member; 61. abutting against the column; 611. a limiting ring; 62. stretching the column; 621. a placement chamber; 7. a roll shaft; 8. a spring; 9. a ball; 10. a locking ring; 11. a telescopic rod; 111. and a limiting block.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
The embodiment of the application discloses a prestressed concrete T-shaped beam with green building characteristics. Referring to fig. 1 and 2, the prestressed concrete T-shaped beam with green building characteristics comprises a web plate 1, wherein the web plate 1 is made of steel reinforcement cage pouring concrete. A through groove 3 and a plurality of sliding grooves 4 are formed in the web plate 1, wherein the through groove 3 is arranged along the length direction of the web plate 1, the through groove 3 and the web plate 1 are coaxially arranged, the sliding grooves 4 are vertically communicated with the through groove 3, and the sliding grooves 4 are uniformly arranged along the length direction of the web plate 1.
Referring to fig. 2 and 3, the sliding grooves 4 are internally provided with tensioning members 6, the tensioning members 6 slide into or out of the through grooves 3 in the sliding grooves 4, and one ends of the tensioning members 6 in the sliding grooves 4 are fixedly provided with prestressed tendons 2, namely the prestressed tendons 2 are fixedly connected with the tensioning members 6. After the prestressed reinforcing steel 2 is stretched, a pushing part 5 is inserted in the through groove 3, the pushing part 5 pushes the plurality of tensioning parts 6, the tensioning parts 6 move in the sliding groove 4 towards the direction far away from the through groove 3, so that the plurality of tensioning parts 6 can further stretch the tensioned prestressed reinforcing steel 2, stronger prestress is applied to the prestressed reinforcing steel 2, and then stronger prestress is applied to the prestressed concrete T-shaped beam through the prestressed reinforcing steel 2, so that the bearing capacity of the prestressed concrete T-shaped beam is enhanced.
Referring to fig. 3 and 4, the pushing member 5 includes a rotating drum 51 and a pushing rod 52, wherein the rotating drum 51 is rotatably disposed in the through slot 3, one end of the web 1 is disposed as an opening, the rotating drum 51 is inserted into the through slot 3 through the opening of the web 1 and abuts against the slot wall of the through slot 3, and the pushing rod 52, which is also disposed as an opening, is inserted into the rotating drum 51 through the opening of the rotating drum 51 and abuts against the inner wall of the rotating drum 51. The ejector rod 52 is provided with a plurality of protrusions 521 with different thicknesses, the protrusions 521 correspond to the ejector parts 5 one by one, the outer wall of the rotary drum 51 is provided with a plurality of connecting holes 511 corresponding to the ejector parts 5, when the rotary drum 51 is arranged in the through groove 3 and the ejector rod 52 is not inserted in the rotary drum 51, one end of the tension part 6 is arranged in the sliding groove 4, and the other end of the tension part 6 passes through the connecting hole 511 and is arranged in the rotary drum 51. The pushing rod 52 is inserted into the rotating drum 51, the tensioning piece 6 slides along the sliding groove 4 towards the direction far away from the pushing rod 52 under the pushing action of the corresponding protrusion 521, the pushing rod 52 pushes the prestressed tendon 2 so as to further tension the prestressed tendon 2, the tensioning range of the prestressed tendon 2 can be enlarged, and the prestress borne by the prestressed concrete T-shaped beam can be adjusted by adjusting the pushing piece 5.
The side wall of the ejector rod 52 is fixed with a plurality of limiting plates 523, the limiting plates 523 are arranged along the length direction of the ejector rod 52, the inner wall of the rotary drum 51 is provided with a plurality of limiting grooves 512 corresponding to the limiting plates 523 one by one, and the limiting grooves 512 are arranged along the length direction of the rotary drum 51. When the ejector rod 52 is inserted into the rotary drum 51, the limit plate 523 is inserted into the limit groove 512 to limit and guide the ejector rod 52, so that the ejector rod 52 slides the protrusion 521 into the through groove 3 toward the sliding groove 4, which is beneficial to reducing the possibility that the protrusion 521 is difficult to push the tension member 6 due to the rotation of the ejector rod 52 in the rotary drum 51, and further, the ejector rod 52 is more stably fixed in the rotary drum 51.
Referring to fig. 3 and 4, in order to reduce the difficulty in adjusting the direction of the ejector pin 52 and inserting the ejector pin 52 into the drum 51, in one aspect, the ejector pin 52 includes a shaft 524 and an access head 525, and the access head 525 is gradually reduced in thickness from an end near the shaft 524 toward an end far from the shaft 524. When the push rod 52 is inserted into the rotating cylinder 51, the access head 525 enters the rotating cylinder 51 and is inserted between the tension member 6 and the wall of the rotating cylinder 51, and pushes the tension member 6 to move the tension member 6 along the sliding groove 4, and the tension member 6 slides along the access head 525 to the rod body 524, which is beneficial to reducing the situation that the push rod 52 is blocked by the tension member 6 and is difficult to insert into the rotating cylinder 51.
On the other hand, a guide ring 522 is fixed on the ejector pin 52, the guide ring 522 is arranged around the protrusion 521, one end, attached to the protrusion 521, of the guide ring 522 is flush with the end surface of the protrusion 521, the thickness of the guide ring 522 is gradually reduced towards the direction away from the protrusion 521, and one end, away from the protrusion 521, of the guide ring 522 extends to be flush with the outer wall of the ejector pin 52, namely, the longitudinal section of the guide ring 522 is triangular. The guide ring 522 forms a transition slope between the ejector rod 52 and the protrusion 521, so that when the ejector rod 52 slides in the length direction of the rotary drum 51 in the rotary drum 51, the tensioning member 6 is pushed by the guide ring 522 to move in a direction away from or close to the ejector rod 52, so that one end of the tensioning member 6 away from the tendon 2 is attached to the end surface of the corresponding protrusion 521, which faces away from the ejector rod 52, and the tendon 2 is tensioned. The guide ring 522 is arranged, so that the tensioning member 6 can slide from the push rod 52 to be attached to the end surface of the protrusion 521, the tensioning member 6 can slide from the end surface of the protrusion 521 to be attached to the push rod 52, and the push rod 52 can be inserted into the rotary drum 51 completely to tension the prestressed tendon 2.
Referring to fig. 3 and 5, the tensioning member 6 includes a butting column 61 and a tensioning column 62 which are coaxially arranged, the butting column 61 is arranged in the rotary drum 51, one end of the tensioning column 62 is arranged in the rotary drum 51 and is jointed with the butting column 61, the other end of the tensioning column 62 is arranged in the chute 4, and one end of the tensioning column 62, which is far away from the butting column 61, is uniformly fixed on the prestressed tendon 2 along the length direction of the prestressed tendon 2. The push rod 52 is inserted into the rotary drum 51, the abutting columns 61 are pushed to move towards the direction far away from the push rod 52, the pushing tension columns 62 are pushed to move towards the direction far away from the push rod 52 along the sliding groove 4, and the plurality of tension columns 62 stretch the prestressed tendons 2, so that the prestressed tendons 2 provide larger prestress for the prestressed concrete T-shaped beam, and the bearing capacity of the prestressed concrete T-shaped beam is improved. When the pushing rod 52 is disposed in the rotating cylinder 51, the tension column 62 is pushed by the abutting column 61 to slide out of the rotating cylinder 51 through the connecting hole 511 and slide into the sliding slot 4, and the abutting column 61 is located in the rotating cylinder 51. The central axis of the rotary drum 51 is used as a shaft to rotate the rotary drum 51, the rotary drum 51 drives the abutting column 61 to rotate, then one end, far away from the prestressed reinforcement 2, of the tensioning column 62 abuts against the wall of the rotary drum 51, the rotary drum 51 supports the tensioning column 62 to continuously and stably tension the prestressed reinforcement 2, and therefore the situation that the prestressed reinforcement 2 is unstable due to the fact that the tensioning column 62 slides along the sliding groove 4 to influence the integrity of the prestressed concrete T-shaped beam can be reduced.
The one end that the post 61 was kept away from to the post that supports of stretch-draw 62 is connected with prestressing tendons 2 through spring 8, when the ejector pin 52 was arranged in the rotary drum 51, spring 8 was pushed up by stretch-draw post 62 and is compressed, and spring 8 carries out the top that lasts and stretch-draw to prestressing tendons 2 for overcoming elastic deformation, and this makes prestressing tendons 2 still receive spring 8's elasticity except that receiving the jacking force, and this has increased prestressing tendons 2's stretch-draw scope, and then has increased the adjustable range of the prestressing force that prestressed concrete T type roof beam received.
Referring to fig. 6, it is connected with a plurality of rollers 7 to rotate on the inner wall that leads to groove 3, and is concrete, has seted up a plurality of recesses 32 on the inner wall that leads to groove 3, and roller 7 all rotates to be connected on the cell wall of recess 32, and the axis of roller 7 parallels with the axis of rotary drum 51, and the roller 7 supports to paste and uses the axis of roller 7 to roll as the axle on the section of thick bamboo wall of rotary drum 51. Compared with the situation that the rotary drum 51 directly rolls in the through groove 3, the rotary drum 51 is in contact with the roller shaft 7, and the roller shaft 7 rolls along with the rotation of the rotary drum 51, which helps to reduce the contact area between the rotary drum 51 and the groove wall of the through groove 3, so as to reduce the friction force applied to the rotary drum 51 in the through groove 3, and further reduce the possibility that the rotary drum 51 or the through groove 3 is damaged due to the excessive friction force between the rotary drum 51 and the groove wall of the through groove 3.
Referring to fig. 5, in order to reduce the friction between the tension column 62 and the roller, a rolling ball 9 is provided at an end of the tension column 62 away from the tendon 2, and when the roller 51 rotates in the through groove 3, the rolling ball 9 rolls against the wall of the roller 51. Specifically, the one end that prestressing tendons 2 was kept away from to tensioning post 62 has been seted up and has been placed chamber 621, tensioning post 62 has been kept away from and has been offered on prestressing tendons 2's the terminal surface and be the circular shape mouthful that stretches out, it is provided with spin 9 in the chamber 621 to place, tensioning post 62 place chamber 621 department and encircle to be fixed with on the inner wall that stretches out mouthful and block ring 10, thereby block ring 10 supports and paste on spin 9 with spin 9 spacing in the auxiliary block, spin 9 is located to block the part between the ring 10 and stretches out the mouth, when rotary drum 51 rolls in logical groove 3, spin 9 supports and pastes and rolls along with rotary drum 51's rotation on rotary drum 51. On one hand, the tensioning column 62 can move out of the connecting hole 511 through the rolling ball 9, which is beneficial to reducing the situation that the rotation of the rotary drum 51 is not enabled due to the fact that the tensioning column 62 is blocked by the connecting hole 511; on the other hand, the tension column 62 is released from the drum 51 by the rolling ball 9, so that the possibility of damage due to excessive friction between the tension column 62 and the drum can be reduced, and the inclination of the tension member 6 for tensioning the tendon 2 due to inclination of the tension column 62 caused by excessive friction can also be reduced.
Referring to fig. 6 and 7, a plurality of fixing grooves 31 are formed in the groove wall of the through groove 3 away from the sliding groove 4, the fixing grooves 31 are arranged along the length direction of the through groove 3, the fixing grooves 31 are perpendicular to the central axis of the rotating drum 51, and the diameter of each fixing groove 31 is smaller than that of the abutting column 61. The telescopic rod 11 is arranged in the abutting column 61 in a sliding mode, one end, contacting with the tensioning column 62, of the abutting column 61 is arranged in an opening mode, and the telescopic rod 11 can slide in or slide out of the abutting column 61 along the length direction of the abutting column 61. The diameter of fixed slot 31 is the same with the diameter of telescopic link 11, and when rotary drum 51 rotated to connecting hole 511 and linked fixed slot 31 and rotary drum 51 in logical groove 3, telescopic link 11 slided out to support post 61 and slided into fixed slot 31 under the action of gravity, telescopic link 11 and support post 61 formed spacing to rotary drum 51 this moment, reducible rotary drum 51 rotates in logical groove 3 and leads to the unstable condition of stretch-draw post 62. The opening part of the abutting column 61 is fixed with a limiting ring 611 in a surrounding mode, the telescopic rod 11 is arranged at one end of the abutting column 61 and is fixed with a limiting block 111, when the telescopic rod 11 slides out of the abutting column 61, the telescopic rod 11 slides in through the opening of the limiting ring 611, and the limiting block 111 abuts against the limiting ring 611 to limit the telescopic rod 11, so that the possibility that the telescopic rod 11 slides into the fixing groove 31 and is separated from the abutting column 61 to cause failure is reduced.
The implementation principle of the prestressed concrete T-shaped beam with the green building characteristic in the embodiment of the application is as follows: set up logical groove 3 and spout 4 in the web 1 of prestressed concrete T type roof beam when concreting, pre-buried to the web 1 with rotary drum 51 in to the prestressing tendons 2 that will be fixed with a plurality of tensioning members 6 set up in prestressed concrete T type roof beam. The prestressed tendon 2 is tensioned, then the ejector rod 52 is inserted into the rotary drum 51, the protrusion 521 pushes the tensioning piece 6 to move in the direction away from the ejector rod 52 and further tension the prestressed tendon 2, the tensioning column 62 moves into the sliding groove 4, and the abutting column 61 is left in the rotary drum 51. The rotating drum 51 is rotated by taking the central axis of the rotating drum 51 as a shaft, the telescopic rod 11 slides into the fixing groove 31 under the action of gravity to fix the rotating drum 51, and then concrete is poured to finish the manufacturing of the prestressed concrete T-shaped beam.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A prestressed concrete T-shaped beam with green architectural characteristics, which comprises a web plate (1), and is characterized in that: a through groove (3) for inserting a pushing piece (5) is formed in the web (1) along the length direction of the web (1), a plurality of sliding grooves (4) are further formed in the web (1), the sliding grooves (4) are uniformly distributed along the length direction of the web (1), the sliding grooves (4) are parallel to each other, the sliding grooves (4) are communicated with the through groove (3), and the central axis of each sliding groove (4) is perpendicular to the central axis of the through groove (3);
slide in spout (4) and be provided with stretch-draw piece (6), stretch-draw piece (6) are kept away from the one end that leads to groove (3) is fixed with prestressing tendons (2), stretch-draw piece (6) are kept away from the one end of prestressing tendons (2) is arranged in lead to in the groove (3), work as push up piece (5) and insert and establish when leading to in the groove (3), push up piece (5) top and push up stretch-draw piece (6) are followed spout (4) are towards keeping away from the direction that leads to groove (3) removes.
2. The prestressed concrete T-shaped beam with green building characteristics according to claim 1, wherein: the pushing part (5) comprises a rotary drum (51) and a pushing rod (52), the pushing rod (52) is arranged in the rotary drum (51) in a sliding mode, a plurality of connecting holes (511) communicated with the sliding groove (4) are formed in the rotary drum (51), a plurality of protrusions (521) are distributed on the pushing rod (52), and the protrusions (521) push the tensioning part (6) to move in the direction away from the through groove (3) along the sliding groove (4).
3. The prestressed concrete T-shaped beam with green building characteristics according to claim 2, wherein: a guide ring (522) is fixed on the periphery of the protrusion (521), and the guide ring (522) extends to the ejector rod (52) from the periphery of the end face of the protrusion (521), which is back to the ejector rod (52), in the direction away from the protrusion (521).
4. The prestressed concrete T-shaped beam with green building characteristics according to claim 2, wherein: follow on the lateral wall of ejector pin (52) the length direction of ejector pin (52) is fixed with a plurality of limiting plates (523), seted up on the inner wall of rotary drum (51) a plurality of with limiting groove (512) of limiting plate (523) one-to-one, work as it inserts to push away piece (5) and establishes when leading to in groove (3), limiting plate (523) are inserted and are established in limiting groove (512).
5. The prestressed concrete T-shaped beam with green building characteristics according to claim 2, wherein: the tensioning piece (6) comprises a butting column (61) and a tensioning column (62) which are arranged in the sliding groove (4) in a sliding mode, the butting column (61) and the tensioning column (62) are coaxially arranged, one end of the butting column (61) butts against the protrusion (521), the other end of the butting column (61) butts against the tensioning column (62), and one end, far away from the butting column (61), of the tensioning column (62) is fixed on the prestressed tendon (2);
when the pushing piece (5) is inserted into the through groove (3), the tensioning column (62) is located in the sliding groove (4), and the abutting column (61) is located in the rotating cylinder (51).
6. The prestressed concrete T-shaped beam with green building characteristics according to claim 5, wherein: a plurality of roll shafts (7) are rotatably connected to the inner wall of the through groove (3), the central axes of the roll shafts (7) are parallel to the central axis of the rotary drum (51), and the roll shafts (7) are attached to the wall of the rotary drum (51);
when the rotary drum (51) rotates in the through groove (3) by taking the central axis of the rotary drum (51) as an axis, one end of the tension column (62) far away from the prestressed tendon (2) is attached to the outer wall of the rotary drum (51).
7. The prestressed concrete T-shaped beam with green building characteristics according to claim 5, wherein: the one end that tensioning post (62) kept away from support post (61) is fixed with spring (8), spring (8) are kept away from the one end of tensioning post (62) is fixed on prestressing tendons (2).
8. The prestressed concrete T-shaped beam with green building characteristics according to claim 5, wherein: a fixing groove (31) is formed in the groove wall of the through groove (3) far away from the sliding groove (4), and when the rotary drum (51) rotates to the position where the bulge (521) faces away from the sliding groove (4), the abutting columns (61) are inserted into the fixing groove (31).
9. The prestressed concrete T-shaped beam with green building characteristics according to claim 8, wherein: the supporting columns (61) are internally provided with telescopic rods (11) in a sliding mode, the telescopic rods (11) and the supporting columns (61) are coaxially arranged, when the rotary drum (51) rotates to the position where the bulges (521) face away from the sliding groove (4), the telescopic rods (11) are inserted into the fixing grooves (31), and the supporting columns (61) are located in the rotary drum (51).
10. The prestressed concrete T-shaped beam with green building characteristics according to claim 5, wherein: it places chamber (621) to have seted up in tensioning post (62), it is equipped with spin (9) in chamber (621) to place, tensioning post (62) are kept away from the one end of prestressing tendons (2) has been seted up and has been stretched out the mouth, supplementary piece is followed stretch out a periphery and encircle and be equipped with stop ring (10), stop ring (10) laminate in spin (9), work as rotary drum (51) are in when leading to groove (3) internal rotation, spin (9) are in rotate on rotary drum (51).
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| CN101050661A (en) * | 2007-04-17 | 2007-10-10 | 中铁工程设计咨询集团有限公司 | Pretensioning prestressed concrete T-shape beam and its producing method |
| KR20110017064A (en) * | 2009-08-13 | 2011-02-21 | 지에스건설 주식회사 | Psc girder making method with straight tendon setting structure |
| CN202466823U (en) * | 2012-03-15 | 2012-10-03 | 中国建筑科学研究院 | Inner tensioning prestressed concrete double-layer T-shaped frame box structure |
| KR20120120600A (en) * | 2011-04-25 | 2012-11-02 | 주식회사 인터컨스텍 | Double T Concrete Girder Having Combined Prestressing and Constructing Method thereof |
| CN113175155A (en) * | 2021-04-27 | 2021-07-27 | 华中科技大学 | Ultra-high performance concrete T-shaped beam of FRP (fiber reinforced plastic) prestressed system and preparation method thereof |
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2022
- 2022-04-20 CN CN202210412888.4A patent/CN114892493A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050661A (en) * | 2007-04-17 | 2007-10-10 | 中铁工程设计咨询集团有限公司 | Pretensioning prestressed concrete T-shape beam and its producing method |
| KR20110017064A (en) * | 2009-08-13 | 2011-02-21 | 지에스건설 주식회사 | Psc girder making method with straight tendon setting structure |
| KR20120120600A (en) * | 2011-04-25 | 2012-11-02 | 주식회사 인터컨스텍 | Double T Concrete Girder Having Combined Prestressing and Constructing Method thereof |
| CN202466823U (en) * | 2012-03-15 | 2012-10-03 | 中国建筑科学研究院 | Inner tensioning prestressed concrete double-layer T-shaped frame box structure |
| CN113175155A (en) * | 2021-04-27 | 2021-07-27 | 华中科技大学 | Ultra-high performance concrete T-shaped beam of FRP (fiber reinforced plastic) prestressed system and preparation method thereof |
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