CN111910760B - Construction method of integral counterweight type pretensioning method prestress tensioning platform - Google Patents
Construction method of integral counterweight type pretensioning method prestress tensioning platform Download PDFInfo
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- CN111910760B CN111910760B CN202010652583.1A CN202010652583A CN111910760B CN 111910760 B CN111910760 B CN 111910760B CN 202010652583 A CN202010652583 A CN 202010652583A CN 111910760 B CN111910760 B CN 111910760B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0032—Moulding tables or similar mainly horizontal moulding surfaces
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
Abstract
The construction method of the prestressed tensioning table with the integral counterweight type pretensioning method is characterized by comprising the following steps of: a. b, constructing a counterweight part of the integral counterweight type pretensioning tensioning table base, c, constructing a tensioning steel structure at the front end of the pretensioning tensioning table base, d, constructing the prestress tensioning table, e, installing a bottom die of the prestress tensioning table, and f, inspecting the construction of the prestress tensioning table base and the tensioning table. The invention has the advantages of scientific and reasonable construction steps of the prestress tensioning platform, tight structure of each component, convenient manufacture, capability of ensuring that the phenomena of uneven settlement and deviation of prestress steel strands of the front-end tensioning part and the rear-end counterweight part are avoided, safer tensioning, better tensioning precision, easiness in local material obtaining of counterweight materials and reduction of engineering cost.
Description
Technical Field
The invention relates to a pretensioning method prestress tensioning table, in particular to a construction method of an integral counterweight type pretensioning method prestress tensioning table seat.
Background
At the present stage, governments in various places have certain requirements on building assembly rate, the development of the assembled structural building in China is actively promoted, and the pretensioning prestressed structural member is taken as an assembled member and has a very strong popularization prospect.
A common pretensioning prestressing pedestal is: pier type pedestal, slot type pedestal, steel die pedestal. The pier type pedestal is divided into a gravity type pedestal, a pile foundation framework type pedestal, a pedestal coaction type pedestal and a framework type pedestal. It is suitable for producing medium and small components, and has sufficient strength, rigidity and stability. Is not suitable for batch production of the ultra-long tensioning prestressed structure and the prestressed component.
The groove type pedestal can bear tension force and overturning moment and can be used as a steam maintenance groove after being covered. However, the stretching length of the groove type base is 50-120 m, and the groove type base is not suitable for mass production of the prestressed component with the stretching length of more than 150 m.
The steel die bed seat is a bed seat which takes a template for manufacturing a component as a prestressed reinforcement anchoring support seat. The template has considerable rigidity, prestressed reinforcements can be placed on the template for tensioning, the template is mainly used on a factory production line, and the factory production line is difficult to have and has certain difficulty for a production line with the tensioning length of more than 200 meters.
Chinese patent CN201910061061.1 discloses a pretensioning prestressed pedestal construction method in 2019, 4.5.2019, in which a groove type pedestal is adopted, the groove type pedestal comprises a gravity pier, a tensioning bracket, a pressure column, a tensioning beam and an anchoring beam, although the technical scheme solves unsafe factors existing in the design of the original pretensioning pedestal, the economic rationality of pedestal construction is ensured, the safety reliability and the economic efficiency of pretensioning pedestal construction are improved, the construction land is reduced, the construction efficiency is improved, the groove type pedestal has the limitations, large-scale components cannot be produced, large-scale and repeated production of prestressed components cannot be realized, and the length of the components cannot reach more than 250 meters.
Therefore, the construction method of the integral counterweight type pretensioning prestressed tensioning platform has various inconveniences and problems in the construction method of the integral counterweight type pretensioning prestressed tensioning platform.
Disclosure of Invention
The invention aims to provide a construction method of an overall counterweight type pretensioning method prestress tensioning platform with an ultra-long length of 150-250 m.
Another objective of the present invention is to provide a construction method of an integral weight type pretensioning prestressed tensioning platform, which can produce the prefabricated members in a large scale, can produce the prefabricated members in a large scale repeatedly, and can improve the labor efficiency.
In order to achieve the purpose, the technical solution of the invention is as follows:
the construction method of the prestressed tensioning table with the integral counterweight type pretensioning method is characterized by comprising the following steps of:
a. pre-tensioning method prestress tensioning base foundation construction
The foundation of the prestress tensioning platform base is a reinforced concrete raft, the reinforcing steel bars of the raft are arranged in a double-layer bidirectional mode, and the reinforcing steel bars of the bottom plate of the raft are placed on the reinforcing steel bars at the bottom of the anchoring beam; the raft plate is provided with a cushion layer which is a concrete foundation cushion layer; the upper part of the foundation at the front end of the tensioning platform is provided with reinforcing steel bars, C40 concrete is poured after the reinforcing steel bars are installed, water is sprayed for maintenance, broken stones are backfilled in the middle of the foundation, a concrete terrace is poured on the upper part of the foundation, the anchoring beam is arranged at the middle bottom of the counterweight part of the raft foundation and longitudinally extends along the same direction as the raft foundation, the lower longitudinal stress reinforcing steel bars of the raft foundation are arranged on the upper parts of the lower reinforcing steel bars of the anchoring beam and are perpendicular to the lower reinforcing steel bars of the anchoring beam, the upper longitudinal reinforcing steel bars of the raft foundation penetrate through the inside of the anchoring beam and are perpendicular to the anchoring beam, the anchoring beam and the raft foundation are simultaneously poured with concrete, after the concrete is molded, the anchoring beam and the raft foundation are combined into a whole, and the anchoring beam and the raft foundation jointly bear the upward tension of the upper anchoring finish rolling screw steel or steel anchor rope. Namely, the anchoring beam actually plays a role in anchoring finish rolling deformed steel bars or steel anchor cables and bears upward tension together with the raft foundation;
b. construction of counterweight part of integral counterweight type pretensioning method prestress tensioning platform
Installing a counterweight fence on the foundation of the integral counterweight type pre-tensioning method prestress tensioning pedestal, anchoring the lower end of the counterweight fence by using fine deformed steel bars, fixing a waste template with the thickness of 12-18 mm in the frame after the counterweight fence is assembled into a steel frame, and filling broken stones in the counterweight fence
c. Construction of tensioning steel structure at front end of prestress tensioning platform
The steel beam of the tension steel structure at the front end of the prestress tension table base is a connecting beam, and the connecting beam is connected with the counterweight part by matching double-channel steel with a steel anchor cable; the steel upright posts are anchored by high-strength bolts and connected with steel beams, and gaps between the steel columns and the foundation are filled with longitudinal steel bars 5 pieces of three-level steel phi 8@100 and C40 micro-expansive concrete; the steel column is anchored with the upper part of the tensioning front end foundation through a T-shaped connecting plate and an embedded anchor bolt;
d. prestressed tensioning platform construction
The prestressed tensioning table cushion layer is a C15 concrete cushion layer, the cushion layer foundation steel bars are arranged in a double-layer bidirectional mode, the tie bars are tensioning table tie bars, the tie bars are provided with bidirectional draw hooks and arranged in a quincunx mode, and the tensioning table foundation concrete is C50 concrete with the thickness of 300 mm; after the tie bars are bound, reserving construction joints, pouring concrete according to the plane of the tensioning platform, watering, pouring and curing, pouring concrete of a tensioning and lifting post-pouring belt and the front end C50 of the pedestal, and watering and curing;
e installation of prestressed stretch-draw bench bottom die
The channel steel bottom die of the prestress tensioning platform is provided with a main beam and a secondary beam which are reversely spliced, and the channel steel bottom die is a secondary beam bottom die reversely; the main beam, the secondary frame beam and the secondary beam bottom die are fixed by using angle steel as a beam position template bottom support and an angle steel template lower side support;
f. construction acceptance of prestressed pedestal and tensioning table
After the construction of the prestress pedestal and the tensioning platform is finished, the examination and acceptance are organized, and the settlement and deformation of the pedestal and the deformation of the tensioning platform are observed according to the specification and drawing requirements.
The construction method of the integral counterweight type pretensioning method prestress tensioning platform can be further realized by adopting the following technical measures.
The method of the preceding, wherein the reinforced concrete raft is a 600mm thick, C40 reinforced concrete raft.
The method, wherein the steel stud is H800X350X14X 16.
The method, wherein the number of the steel columns for connecting the steel beams is determined according to the number of the tension lines.
By adopting the technical scheme, the construction method of the integral counterweight type pretensioning method prestress tensioning platform has the following advantages:
1. the construction steps of the prestress tensioning platform are scientifically and reasonably arranged, and each component has a tight structure and is convenient to manufacture;
2. the integral counterweight type pretensioning method prestress tensioning platform uniformly arranges the counterweight part of the tensioning pedestal and the tensioning end part at the front end of the pedestal on the same raft foundation, so that the uneven settlement of the front end tensioning part and the rear end counterweight part caused by two different foundation forms is avoided, the deformation of the front end steel structure part is avoided, and the phenomena of anchor release and deviation of prestress steel strands in the front end tensioning prestress process are avoided;
3. the tensioning is safer, the tensioning precision is better, the counterweight material is easy to be obtained from local materials, and the engineering cost is reduced;
4. the construction method of the prestress tensioning table is more suitable for geological conditions and can be constructed on the basis of geological conditions such as a weak subjacent layer.
Drawings
FIG. 1 is a schematic structural diagram of an integral counterweight pretensioned prestressing force tensioning pedestal according to an embodiment of the present invention;
FIG. 2 is a schematic view of a bottom mold assembly according to an embodiment of the present invention;
FIG. 3 is a schematic elevational view of a counterweight frame according to an embodiment of the invention;
fig. 4 is a schematic view of a concrete construction sequence of the tensioning table according to the embodiment of the invention.
In the figure: 1-pedestal foundation part, 3-pedestal counterweight part, 4-pedestal front end tension steel structure part, 5-tension table part, 55-foundation raft plate double-layer bidirectional three-level steel phi 14@150, 56-200X200X16 steel plate anchoring end, 37-anchor rope beam lower part steel bar three-level steel 6 phi 20 and erection steel bar three-level steel 4 phi 16,57-50 thick C15 concrete foundation cushion layer, 23-600 mm thick C40 reinforced concrete raft plate, three-level steel 14@150, double-layer bidirectional, bottom plate steel bars are placed on beam bottom steel bars, 36-anchoring beam stirrup three-level steel 10@100, 35-anchor rope beam upper part steel bar three-level steel 6 phi 20, 7-finish rolling screw steel anchoring, 8-25b steel channel, 39-12-18 mm thick waste templates, 12-gravel filling, 9-16b steel channel 400, 13-anchor rope or screw pipe anchoring beam, 54-double 25a channel steel fixed connecting beam, 14-H800X350X14X16 connecting beam, 15-M30 high-strength bolt anchorage, 16-H800X 350X14X16 tensioning steel upright, 59-tensioning front end upper foundation C40 reinforced concrete stressed reinforced bar three-level steel 14@150, 20-M30 embedded tensioning steel column anchor bolt, 22-100 thick C20 concrete floor, 58-gravel compaction, 60-tensioning front end upper foundation C40 reinforced concrete distributed reinforced bar three-level steel 10@150, 17-grouting material sealing, 33-pedestal front end construction joint, 30-tensioning platform tie bar, three-level steel phi 8@400 two-way drag hook and quincunx arrangement, 34-tensioning platform C15 concrete 50 thick cushion layer, 61-tensioning platform steel bar double-level two-way three-level steel 10@200, 62-tensioning platform 300 thick C50 concrete, 40-20# b bottom die, 41-L50X5 bottom supporting beam position channel steel supporting template angle steel @ 24, 42-25a channel steel bottom die, 43-L30X3 angle steel @ beam position template bottom support, 44-L50X5 angle steel template lower side support, 45-expansion bolts M16 bottom die fixing bolts, 46-tensioning platform rear casting belt, 47-plane tensioning construction joint, 52-I area C50 concrete tensioning platform concrete pouring and 53-II area C50 concrete tensioning platform concrete pouring.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural view of an integral counterweight type pretensioned prestressing tensioning bed according to an embodiment of the present invention.
The invention relates to a construction method of an integral counterweight type pretensioning method prestress tensioning platform, which comprises the following steps:
1. the foundation part 1 of the integral counterweight pre-tensioning method prestress tensioning base is constructed: the foundation is a C40 reinforced concrete raft 23 with the thickness of 600mm and three-level steel 14@150, and is arranged in a double-layer bidirectional mode, and bottom plate steel bars are placed on steel bars at the bottom of the beam; the anchoring beam is 600X1200, the anchoring beam stirrup 36 is three-level steel 10@100, the steel bar 35 at the upper part of the anchor cable beam is three-level steel 6 phi 20, and the steel bar 37 at the lower part of the anchor cable beam is three-level steel 6 phi 20mm and erection steel three-level steel 4 phi 16; the cushion layer is a C15 concrete foundation cushion layer 57 with the thickness of 50 mm; the method comprises the steps of firstly, stretching a platform to form C40 reinforced concrete with the thickness of 600mm on the upper foundation of the front end of the stretching platform, secondly, casting C40 concrete after the steel bar is installed, carrying out watering maintenance, backfilling broken stones 58 in the middle of the foundation, tamping the broken stones, and finally, casting a C20 concrete terrace 22 with the thickness of 100mm on the upper portions of the broken stones, wherein the C40 reinforced concrete stressed steel bar 59 is three-level steel 14@150, and the C40 reinforced concrete distributed steel bar 60 is three-level steel 10@ 150.
2. And (3) construction of a counterweight part 3 of the integral counterweight type pretensioning method prestress tensioning platform: install the counter weight rail on whole counter weight formula pretension method prestressing force stretch-draw bench foundation, the counter weight rail lower extreme adopts 25b channel-section steel 8, and the upper end adopts 25b channel-section steel 11, and 16b channel-section steel 9 interval 400 connects upper and lower extreme 25b channel-section steel, after assembling the steel frame jointly, fixed with old and useless template 39 of 12 ~ 18mm thickness inside the frame, pack the rubble 12 in the combination counter weight rail. Fig. 3 is a schematic front elevation view of a counterweight frame according to an embodiment of the invention.
3. And (3) carrying out construction on a steel structure tensioning part 4 at the front end of the integral counterweight type pretensioning method prestress tensioning platform: the steel beam is H800X350X14X16 connecting beam 14, and is connected with the counterweight part by adopting double 25a channel steel 54 and a steel anchor cable 13; the steel upright is an H800X350X14X16 tension steel upright 16, an M30 high-strength bolt 15 is connected with a steel beam in an anchoring mode, a gap between the steel column and a foundation is filled with three-level steel phi 8@100 and C40 micro-expansion concrete 17 through 5 gap longitudinal steel bars 19; the steel column is anchored with the upper part of the base of the tensioning front end through a T-shaped connecting plate with the thickness of 20mm and an M24 embedded anchor bolt 18; the number of the steel beams and the steel columns is determined according to the layout number of the tension lines, the project is 25 lines, and the distance between the steel beams and the steel columns is 400mm of the width of a main beam, 400mm of a secondary frame beam and 250mm of a secondary beam.
And (3) constructing an integral counterweight type pretensioning method prestress tensioning platform part 5: the cushion layer is a tensioning platform C15 concrete 50mm thick cushion layer 34; the foundation steel bars are tension table steel bars 61 and arranged in a double-layer bidirectional three-level steel phi 10@200 mode, the tie bars are tension table tie bars 30, the three-level steel phi 8@400 is arranged in a bidirectional drag hook and quincunx mode, and the foundation concrete is tension table 300mm thick C50 concrete 62. And after the steel bars are bound, reserving construction joints 47 according to a plan view, pouring C50 concrete 52 in the area I according to the plan view of the tensioning platform, performing watering pouring maintenance, pouring a tensioned and lifted post-pouring belt and C50 concrete 46 at the front end of the pedestal after 28 days, and performing watering maintenance.
5. Mounting a bottom die of a prestress tensioning table: a bottom die 40 with 20b channel steel bottom dies reversely spliced as a main beam and a secondary frame beam; the 25a channel steel bottom die is reversed to be the secondary beam bottom die 42; the main beam, the secondary frame beam and the secondary beam bottom die are fixed through a L50X5 angle steel 41 beam position template bottom support, a L30X3 angle steel 43 beam position template bottom support and a L50X5 angle steel 44 template lower side support. Fig. 2 is a schematic view of installation of a bottom mold in the embodiment of the present invention, and fig. 4 is a schematic view of a concrete construction sequence of a tension table in the embodiment of the present invention.
6. After the construction of the prestress pedestal and the tensioning platform is finished, the examination and acceptance are organized, and the settlement and deformation of the pedestal and the deformation of the tensioning platform are observed according to the standard and drawing requirements.
The invention has substantive characteristics and obvious technical progress, the invention is a construction method of split counterweight type and integral counterweight type pretensioning method prestress tensioning table, the counterweight part of the pedestal is suitable for the raft foundation, the tensioning part at the front end adopts an independent foundation or an integral pile foundation to form the raft foundation, the counterweight part adopts channel steel, finish rolling screw steel, templates and other forms to combine and is installed on the counterweight foundation, masonry, sand or soil are filled in the counterweight foundation, the tensioning part at the front end adopts H-shaped steel to assemble and is connected with the counterweight part at the rear part through a steel cable or finish steel, the concrete part of the tensioning field adopts C50 high-strength concrete which is tightly connected with the front end of the pedestal, the resistance of the tensioning part at the front end of the pedestal is improved, the bottom die of the precast beam of the tensioning field adopts a channel steel reverse buckling form, and the forming effect and the damage resistance of the bottom of the precast beam can be improved.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (4)
1. The construction method of the prestressed tensioning table with the integral counterweight type pretensioning method is characterized by comprising the following steps of:
a. pre-tensioning method prestress tensioning base foundation construction
The foundation of the prestress tensioning platform base is a reinforced concrete raft, the reinforcing steel bars of the raft are arranged in a double-layer bidirectional mode, and the reinforcing steel bars of the bottom plate of the raft are placed on the reinforcing steel bars at the bottom of the anchoring beam; the raft plate is provided with a cushion layer which is a concrete foundation cushion layer; arranging steel bars in the upper part of the foundation at the front end of the tensioning platform, pouring C40 concrete after the installation of the steel bars, watering and curing, backfilling broken stones in the middle of the foundation, pouring a concrete terrace on the upper part, wherein the anchoring beam is arranged at the middle bottom of the counterweight part of the raft foundation and longitudinally extends in accordance with the raft foundation, the longitudinal stress steel bars at the lower part of the raft foundation are arranged at the upper parts of the steel bars at the lower part of the anchoring beam, and is vertical to the lower reinforcing steel bars of the anchoring beam, the upper longitudinal reinforcing steel bars of the raft foundation penetrate through the anchoring beam, the anchoring beam and the raft foundation are simultaneously poured with concrete, after the concrete is formed, the anchoring beam and the raft foundation are combined into a whole, the anchoring beam and the raft foundation jointly bear the upward tension of the upper anchoring finish rolling deformed steel bar or steel anchor rope, namely, the anchoring beam actually plays a role in anchoring finish rolling deformed steel bars or steel anchor cables and bears upward tension together with the raft foundation;
b. construction of counterweight part of integral counterweight type pretensioning method prestress tensioning platform
Installing a counterweight fence on the foundation of the integral counterweight pre-tensioning method prestress tensioning pedestal, finely anchoring the lower end of the counterweight fence by using deformed steel bars, assembling the counterweight fence into a steel frame, fixing a waste template with the thickness of 12-18 mm in the frame, and filling broken stones in the counterweight fence;
c. construction of tensioning steel structure at front end of prestress tensioning platform
The tension steel structure at the front end of the prestress tension table base is provided with a connecting steel beam, and the connecting steel beam and the steel anchor cable are connected with the counterweight part; a plurality of steel upright posts are anchored by high-strength bolts and connected with steel beams, and gaps between the steel upright posts and the foundation are filled with longitudinal steel bars 5 pieces of three-level steel phi 8@100 and C40 micro-expansion concrete; the steel upright post is anchored with the upper part of the tensioning front end foundation through a T-shaped connecting plate and an embedded anchor bolt;
d. prestressed tensioning platform construction
The prestressed tensioning table cushion layer is a C15 concrete cushion layer, the cushion layer foundation steel bars are arranged in a double-layer bidirectional mode, the tie bars are tensioning table tie bars, the tie bars are provided with bidirectional draw hooks and arranged in a quincunx mode, and the tensioning table foundation concrete is C50 concrete with the thickness of 300 mm; after the tie bars are bound, reserving construction joints, pouring concrete according to the plane of the tensioning platform, watering, pouring and curing, pouring concrete of a tensioning and lifting post-pouring belt and the front end C50 of the pedestal, and watering and curing;
e. installation of bottom die of prestress tensioning table
The channel steel bottom die of the prestress tensioning platform is provided with a main beam and a secondary beam which are reversely spliced, and the channel steel bottom die is a secondary beam bottom die reversely; the main beam, the secondary frame beam and the secondary beam bottom die are fixed by using angle steel as a beam position template bottom support and an angle steel template lower side support;
f. construction acceptance of prestressed pedestal and tensioning table
After the construction of the prestress pedestal and the tensioning platform is finished, the examination and acceptance are organized, and the settlement and deformation of the pedestal and the deformation of the tensioning platform are observed according to the standard and drawing requirements.
2. The construction method of the integral weight type pretensioning prestressed tensioning platform according to claim 1, wherein the reinforced concrete raft is 600mm thick.
3. The construction method of the integrated counterweight type pretensioned prestressing tensioning station of claim 1, wherein the steel upright is of type H800X350X14X 16.
4. The construction method of an integral weight type pretensioned prestressing tension table according to claim 1, wherein the number of the steel columns for connecting the steel beams is determined according to the number of the tension line arrangements.
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| CN101748681B (en) * | 2009-12-22 | 2011-04-06 | 浙江省大成建设集团有限公司 | Pretensioning method construction technology of 50m broken line reinforced concrete T-shaped beam |
| CN203603508U (en) * | 2013-11-14 | 2014-05-21 | 广厦湖北第六建设工程有限责任公司 | Multifunctional pre-stress pre-tensioning pedestal |
| CN208514716U (en) * | 2018-05-29 | 2019-02-19 | 杨众 | The removable stretching bed seat of anchorage formula |
| CN109676784A (en) * | 2019-01-23 | 2019-04-26 | 四川公路桥梁建设集团有限公司 | A kind of assembled steel-concrete combined structure pedestal and pre-tensioning system T beam construction |
| CN109577212A (en) * | 2019-01-23 | 2019-04-05 | 中水电第十工程局（郑州）有限公司 | A kind of pretensioned prestressing Precasting Pedestal Construction method |
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