CN109930892A - A kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure - Google Patents
A kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure Download PDFInfo
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- CN109930892A CN109930892A CN201910206036.8A CN201910206036A CN109930892A CN 109930892 A CN109930892 A CN 109930892A CN 201910206036 A CN201910206036 A CN 201910206036A CN 109930892 A CN109930892 A CN 109930892A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The present invention provides a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structures, its circular ring shape concrete tower segments is connected and composed by four 1/4 arc-shaped precast concrete tower fragment circumferential directions, it is bolted into the domain by the way that horizontal prestressing force is curved between adjacent concrete tower fragment, the vertical reinforcement in the arc-shaped precast concrete tower fragment uses the pretensioned prestressing muscle before concreting；It is bolted between adjacent segment concrete tower segments by the circumferential vertical prestressing being evenly arranged；Top section concrete tower segments are connect by the circumferential vertical prestressing bolt being evenly arranged with steel tower tube.The present invention meets the requirement that Wind turbines are altitude, enlarged, while can avoid using prestress wire and grouting connection type, has the characteristics that install convenient, is connected firmly, recyclable reuses and can lot flow construction.
Description
Technical field
The invention belongs to the high tower technical fields of low wind speed area Wind turbines, and in particular to a kind of top is conventional steel tower
Cylinder, lower part is pre-tensioning system fragment prefabricated prestressing concrete tower.
Background technique
Currently, China tradition Wind turbines support construction overwhelming majority uses steel cone tower, but with China's wind
The fast development of power power industry, Wind turbines single-machine capacity is increasing, in order to efficiently use the wind energy resources in low wind speed area,
Gradually to the altitude development of enlargement, matching hub height and rigidity requirement are continuously increased Wind turbines.When wheel hub height
When degree is more than 100m, due to the limitation of conventional highway transportation size, steel tower tube base diameter generally can not be more than 4.3m, therefore only
The bending resistance of structure can be improved by increasing steel tower tube wall thickness, cause material and machining cost that can dramatically increase.With
The overall flexibility of the increase of hub height, steel tower drum becomes larger, and causes tower top displacement excessive, Fatigue Damage Problem highlights, seriously
Blower is influenced to operate normally；In addition, the soft tower single order natural frequency of vibration of all steel is lower than the rated speed frequency of impeller, i.e., for flexible tower
It goes to during impeller reaches rated speed, can be resonated on some revolving speed point with impeller from impeller for frame, though it can lead to
The control strategy of toning complete machine group makes blower fast skip this revolving speed, but can lose 3% ~ 5% or so generated energy.
Steel reinforced concrete pylon lower part uses steel tower drum using concrete tower, top, by prestress wire system by steel
Tower, concrete tower are connected with blower foundation, make concrete towers barrel structure generally in preloading condition to resist Wind turbines
Moment, be able to satisfy the requirement of large-scale wind electricity machine unit hub height and rigidity, the frequency crossing problem of soft tower avoided, in height
Tower technical field of wind power has obtained certain concern and popularization and application.But existing steel reinforced concrete pylon scheme is all made of post stretching, i.e.,
Pretightning force is applied to concrete tower by internal or external steel strand wires after concrete tower is installed, with tower height
Increase, the cost of prestress wire system and tensioning maintenance procedures are complicated, loss of prestress is serious and grouting connection is supported
The factors such as difficulty of construction is big for shield, the period is long can restrict existing steel reinforced concrete pylon scheme in the development in high tower field.
Summary of the invention
It is mixed the purpose of the present invention is in view of the above problems, providing a kind of pre-tensioning system fragment prefabricated prestressing
Solidifying soil pylon structure, meets the requirement that Wind turbines are altitude, enlarged, while can avoid using prestress wire and grouting
Connection type has the characteristics that install convenient, is connected firmly, recyclable recycling and can lot flow construction.For
This, the invention adopts the following technical scheme:
A kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure, the pylon structure include top steel tower drum
With lower part prestressed concrete tower cylinder, the prestressed concrete tower cylinder vertically connects structure by more piece circular ring shape concrete tower segments
At；It is characterized by:
The circular ring shape concrete tower segments are connected and composed by four 1/4 arc-shaped precast concrete tower fragment circumferential directions, adjacent
The domain, the arc-shaped precast concrete tower fragment are bolted by the way that horizontal prestressing force is curved between concrete tower fragment
In vertical reinforcement using the pretensioned prestressing muscle before concreting；Pass through circumferential direction between adjacent segment concrete tower segments
The vertical prestressing being evenly arranged is bolted；Top section concrete tower segments pass through the circumferential vertical prestressing bolt being evenly arranged
It is connect with steel tower tube.
Further, the concrete tower fragment by pre-tensioning system it is prefabricated, strength grade of concrete C50 ~ C70 it
Between, 15m ~ 20m every section high, pretensioning muscle exists the presstressed reinforcing steel anchoring temporarily of tensioning to proof stress before pouring
On pedestal or steel form, concrete has been poured when its intensity guarantees that presstressed reinforcing steel and concrete there are enough bondings, has been loosened pre-
Stress rib just applies concrete component in the presstressed reinforcing steel elastical retraction stage by the anchoring effect of concrete and presstressed reinforcing steel
Prestressing；Four concrete tower fragments are spliced into after the domain from the bottom to top lifting paragraph by paragraph, and pass through vertical prestressing bolt
It connects integral.
Further, the vertical section of concrete tower fragment be in zigzag, by top thicken linkage section, middle part direct tube section and
Lower part thickeies linkage section and constitutes；Top thickeies linkage section wall thickness to increase on the inside of tower, and reserves PVC bolt duct, on top
Thicken the pre-buried annular billet in linkage section top surface；Lower part thickeies linkage section wall thickness to increase on the outside of tower, and reserves PVC bolt hole
Road, thickeies inside linkage section that anchor slab, the upper surface welded nut of upper anchor slab are thickeied in lower part on pre-buried circular ring shape bolt in lower part
The pre-buried annular billet in linkage section bottom surface.The billet reserves bolt penetration hole.
Further, the top of adjacent concrete tower segments thickeies linkage section and lower part thickeies the internal-and external diameter one of linkage section
It causes, to guarantee that concrete tower segments are completely overlapped in section part up and down, force-transfer characteristic is more preferable.
Further, the concrete tower outer diameter is in piecewise reducing type, concrete in entirety according to concrete tower segments
The barrel dliameter of tower gradually reduces from bottom to top；Bottom section concrete tower segments are connect by anchor bolt with blower foundation, and anchor bolt runs through bottom
The lower part of section coagulation tower thickeies linkage section, and in anchor bolt cage lower flange, upper end is anchored in lower part and thickeies linkage section anchoring lower ends
Upper surface；Vertical prestressing bolt between adjacent segment concrete tower segments, the upper end and the nut spiral shell for being welded on anchor slab
Line connection, and pass through lower part and thicken the PVC bolt duct of linkage section and top thickening linkage section internal reservation and extend downwardly out
Top thickeies linkage section, applies bolt pretightening by way of the tensioning of bottom, and is anchored to top and thickeies linkage section bottom surface
Lower anchor slab；The vertical prestressing bolt between section concrete tower segments and steel tower tube is pushed up, the upper end is anchored in steel tower tube L-type flange
Upper surface, anchoring lower ends in top thicken linkage section bottom surface lower anchor slab.
Further, the prestressing force summation and concrete of the vertical prestressing bolt between adjacent segment concrete tower segments
The stretching force summation of presstressed reinforcing steel is equal inside tower segments, to guarantee between concrete tower segments in the continuous of junction internal force
Property.
Further, the concrete tower fragment reserves arc-shaped PVC bolt duct, horizontal prestressing force along horizontal circumferential direction
Curved bolt passes through the arc-shaped PVC bolt duct, and oral area of the concrete tower fragment inner wall in arc-shaped PVC bolt duct is set
There is the nut operation groove of the curved bolt installation of horizontal prestressing force.
Further, the size of nut operation groove meets the perforation stroke of horizontal curved bolt, and nut operates groove end face
It is vertical with the tangential direction in arc-shaped PVC bolt duct.
Further, the both ends of the curved bolt of horizontal prestressing force are anchored at the anchor slab closed with nut operation groove ends face paste.
Further, vertical prestressing bolt, the curved bolt of horizontal prestressing force and anchor bolt carry out preservative treatment, perps and water
Waterproof gasket cement is smeared in edge joint position when flush joint splices.
The beneficial effects of the present invention are:
(1) a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure proposed by the present invention, in concrete component
Stress is just previously applied in prefabrication process to it, bending resistance and the cracking resistance of concrete tower on the one hand can be improved, on the other hand
The mixed tower scheme of tradition be can avoid using expensive caused by prestress wire, tensioning maintenance procedures are complicated, loss of prestress
Seriously, the drawbacks such as difficulty of construction is big, the period is long.
(2) pretensioned concrete tower fragment is formed by factory's concentration pre-casting, and concrete pouring quality is secure, and tower
The prefabricated precision of fragment is high, can reach the section flatness requirement for exempting from grouting connection, using assembled theory, the perps and water of tower
Flush joint is connected by pre-stressed bolt, can lot flowization splicing lifting, by the way of being connected with the mixed tower scheme of tradition using grouting
It compares, can substantially reduce the construction and maintenance period, reduce cost, and recycling can be recycled to a certain extent, have significant
Economical and environmentally friendly benefit.
(3) using the pylon structure scheme of lower mixed upper steel, Wind turbines tower overall stiffness can be made to enhance, amplitude reduction,
On the one hand it can effectively avoid structural fatigue problem caused by tower is periodically substantially swung, another aspect tower intrinsic frequency increases
Greatly, the rotational frequency that can effectively avoid draught fan impeller to avoid resonance, while can utmostly avoid because tower amplitude is excessive
Caused unit lock machine problem, effectively improves generated energy.
(4) the vertical section of concrete tower fragment is in zigzag, is arranged and thickeies linkage section up and down, can make tower diameter under
It is supreme to reduce step by step, and force-transfer characteristic is good, can avoid the existing tower of reducing type step by step using cone cylinder formula linkage section and carries out tower
Problem of stress concentration existing for diameter transition.
Detailed description of the invention
Fig. 1 is a kind of integral vertical of pre-tensioning system fragment prefabricated prestressing concrete tower constructive embodiment of the present invention
Face figure.
Fig. 2 is pre-tensioning system precast concrete tower segment elevation in the embodiment of the present invention.
Fig. 3 is the position the A enlarged drawing of Fig. 1, is connect for bottom concrete towers cylinder section in the embodiment of the present invention with blower foundation
The partial schematic diagram at place.
Fig. 4 is the position the B enlarged drawing of Fig. 1, is the office of vertical junction between concrete tower segments in the embodiment of the present invention
Portion's schematic diagram.
Fig. 5 is the position the C enlarged drawing of Fig. 1, is top concrete tower segments and steel tower tube junction in the embodiment of the present invention
Partial schematic diagram.
Fig. 6 is the D-D sectional view of Fig. 1, is the vertical bolt layout drawing of horizontal joint connection in the embodiment of the present invention.
Fig. 7 is arc-shaped concrete tower fragment circumferential direction splicing schematic diagram in the embodiment of the present invention.
Fig. 8 is the position the E enlarged drawing of Fig. 7, is that arc-shaped concrete tower fragment circumferential direction bolt connects in the embodiment of the present invention
Connect the partial schematic diagram at place.
Fig. 9 is arc-shaped precast concrete tower fragment schematic diagram in the embodiment of the present invention.
Specific embodiment
The present embodiment is the tower that a hub height is 120m, and middle and upper part is 40m conventional steel tower 1, lower part by
Four sections be 20m high circular ring shape pre-tensioning system precast concrete tower segments 2 form concrete tower 3, all concrete towers
Fragment 15 is formed by factory's concentration pre-casting, and transport to scene carries out splicing lifting.The present invention is made with reference to the accompanying drawing further
It is described in detail.
As shown in Fig. 1 ~ Fig. 9, a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure in the present embodiment
Including top steel tower drum 1 and lower part prestressed concrete tower cylinder 3, the prestressed concrete tower cylinder 3 by four sections of 20m high circle
Annular concrete tower segments 2 vertically connect and compose；The circular ring shape concrete tower segments 2 are identical 1/4 arc-shaped pre- by four
15 circumferential direction of concrete fragment processed connects and composes.
As shown in figure 9, the concrete tower fragment 15 is prefabricated by pre-tensioning system, and strength grade of concrete C60, every section
High 20m, pretensioning muscle to proof stress, the vertical muscle of concrete tower fragment 15 uses presstressed reinforcing steel before pouring,
By the presstressed reinforcing steel anchoring temporarily of tensioning on pedestal or steel form, concrete is poured and has waited for that its intensity reaches design strength value
75%, when guaranteeing that presstressed reinforcing steel and concrete there are enough bondings, loosen presstressed reinforcing steel, by the viscous of concrete and presstressed reinforcing steel
Effect is tied, prestressing force just is applied to concrete component in the presstressed reinforcing steel elastical retraction stage.
Further, in pre-tensioning system prefabrication process to presstressed reinforcing steel apply control tensioning force value need in conjunction with load data into
It is determined after row overall calculation.
As shown in Fig. 1 ~ Fig. 2 and Fig. 9, the vertical section of concrete tower fragment 15 be in zigzag, by top thicken linkage section 6,
Middle part direct tube section 7 and lower part thicken linkage section 8 and constitute.Top thickeies 6 wall thickness of linkage section to increase on the inside of tower, and reserves PVC
Bolt duct 9 thickeies the pre-buried annular billet 10 in 6 top surface of linkage section on top；Lower part thickeies 8 wall thickness of linkage section to tower outside
Increase, and reserved PVC bolt duct 9, thickeies anchor slab 11 on the 8 pre-buried circular ring shape bolt in inside of linkage section, upper anchor slab 11 in lower part
Upper surface welded nut 12, thicken the pre-buried annular billet 10 in 8 bottom surface of linkage section in lower part.
Further, as shown in figure 4, top thickening linkage section 6 is consistent with the lower part thickening internal-and external diameter of linkage section 8, to protect
Concrete towers shell ring section 2 is completely overlapped in section part above and below demonstrate,proving, and force-transfer characteristic is more preferable.
As shown in Figure 1 and Figure 4, the concrete tower outer diameter thickeies linkage section 6 on top and lower part thickeies linkage section 8
Place is set, is gradually reduced from the bottom to top, it is whole in reducing type step by step.As shown in figures 1 and 3, bottom section concrete tower segments 2 pass through anchor
Bolt 5 is connect with blower foundation 4, and anchor bolt 5 thickeies linkage section 8 through the lower part of bottom section coagulation tower 2, and anchoring lower ends are under anchor bolt cage
Flange 16, upper end are anchored in the upper surface that lower part thickeies linkage section.Thereon by circumferential equal between each segment concrete tower segments 2
The vertical prestressing bolt 13 of even arrangement connects, as shown in figure 4,13 upper end of vertical prestressing bolt and being welded on anchor slab
11 nut 12 is threadedly coupled, and the PVC bolt duct 9 for passing through the upper and lower part thickening internal reservation of linkage section 6 and 8 extends to down
Portion's structure applies bolt pretightening by way of the tensioning of bottom, and is anchored to the lower anchor slab that top thickeies 6 bottom surface of linkage section
14.Top section concrete tower segments 2 are connect by the circumferential vertical prestressing bolt 13 being evenly arranged with steel tower tube 1, on bolt 13
End is anchored in the upper surface of steel tower tube L-type flange 19, and anchoring lower ends thicken the lower anchor slab 14 of 6 bottom surface of linkage section in top.
Further, top thickeies linkage section 6 and lower part thickeies the prestressing force summation of vertical bolt 13 at 8 position of linkage section
It is equal with the stretching force summation of 3 inside presstressed reinforcing steel of concrete tower, to guarantee concrete towers shell ring section 2 in junction internal force
Continuity.
As shown in Fig. 7 ~ Fig. 9, arc-shaped PVC bolt hole is reserved on the inside of the zigzag section of the concrete tower fragment 15
Road 21, the nut that the horizontal curved bolt 20 that 15 inner wall of concrete tower fragment is equipped with respective numbers is installed operates groove 17, into one
The size on step ground, nut operation groove 17 should meet the perforation stroke of horizontal curved bolt 20, and nut operates 17 end face of groove and circle
The tangential direction in arc PVC bolt duct 21 is vertical.Pass through curved 20 He of bolt of horizontal prestressing force between concrete tower fragment 15
Waterproof gasket cement connects into the domain, and the both ends of horizontal curved bolt 20 are anchored at the anchor slab 18 being bonded with 17 end face of nut handle hole
Place.Four concrete tower fragments 15 are spliced into after the domain from the bottom to top lifting paragraph by paragraph, and are connected by vertical prestressing bolt 13
It is connected into entirety.
Further, in this embodiment all vertical connection bolts 13, the curved bolt 20 of horizontal connection and anchor bolt 5 are both needed to carry out
Preservative treatment, all perps and horizontal joint need to smear waterproof gasket cement in edge joint position when splicing.
Above embodiments are only a kind of more excellent technical solution of the invention, it will be understood by those of skill in the art that not
Be detached from the principle of the present invention and essential situation can in embodiment technical solution or parameter modify or replace, all
It is covered by the protection scope of the present invention.
Claims (10)
1. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure, the pylon structure includes top steel tower
Cylinder and lower part prestressed concrete tower cylinder, the prestressed concrete tower cylinder are vertically connected by more piece circular ring shape concrete tower segments
It constitutes；It is characterized by:
The circular ring shape concrete tower segments are connected and composed by four 1/4 arc-shaped precast concrete tower fragment circumferential directions, adjacent
The domain, the arc-shaped precast concrete tower fragment are bolted by the way that horizontal prestressing force is curved between concrete tower fragment
In vertical reinforcement using the pretensioned prestressing muscle before concreting；Pass through circumferential direction between adjacent segment concrete tower segments
The vertical prestressing being evenly arranged is bolted；Top section concrete tower segments pass through the circumferential vertical prestressing bolt being evenly arranged
It is connect with steel tower tube.
2. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 1, feature
Be: the concrete tower fragment by pre-tensioning system it is prefabricated, strength grade of concrete between C50 ~ C70,15m every section high ~
20m, pretensioning muscle is to proof stress before pouring, by the presstressed reinforcing steel anchoring temporarily of tensioning in pedestal or steel form
On, concrete has been poured when its intensity guarantees that presstressed reinforcing steel and concrete there are enough bondings, loosens presstressed reinforcing steel, by mixed
The anchoring effect of solidifying soil and presstressed reinforcing steel just applies prestressing force to concrete component in the presstressed reinforcing steel elastical retraction stage；Four
Concrete tower fragment is spliced into after the domain from the bottom to top lifting paragraph by paragraph, and is bolted by vertical prestressing integral.
3. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 1, feature
Be: the vertical section of concrete tower fragment is in zigzag, thickeies linkage section, middle part direct tube section and lower part by top and thickeies connection
Section is constituted；Top thickeies linkage section wall thickness to increase on the inside of tower, and reserves PVC bolt duct, thickeies linkage section top on top
The pre-buried annular billet in face；Lower part thickeies linkage section wall thickness and increases on the outside of tower, and reserved PVC bolt duct, in lower part plus
Anchor slab on pre-buried circular ring shape bolt inside thick linkage section, the upper surface welded nut of upper anchor slab thicken linkage section bottom surface in lower part
Pre-buried annular billet；The billet reserves bolt penetration hole.
4. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 3, feature
Be: the top thickening linkage section of adjacent concrete tower segments is consistent with the lower part thickening internal-and external diameter of linkage section, to guarantee up and down
Concrete tower segments are completely overlapped in section part, and force-transfer characteristic is more preferable.
5. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 3, feature
Be: the concrete tower outer diameter is in piecewise reducing type in entirety according to concrete tower segments, and the barrel dliameter of concrete tower is certainly
Gradually reduce on down；Bottom section concrete tower segments are connect by anchor bolt with blower foundation, and anchor bolt is through bottom section coagulation tower
Lower part thickeies linkage section, and for anchoring lower ends in anchor bolt cage lower flange, upper end is anchored in the upper surface that lower part thickeies linkage section；Adjacent segments
Vertical prestressing bolt between section concrete tower segments, the upper end is connect with the nut thread for being welded on upper anchor slab, and is passed through
Lower part thickeies linkage section and top thickeies the PVC bolt duct of linkage section internal reservation and extends downwardly out top and thicken connection
Section, applies bolt pretightening by way of the tensioning of bottom, and is anchored to the lower anchor slab that top thickeies linkage section bottom surface；It is mixed to push up section
Vertical prestressing bolt between solidifying soil tower segments and steel tower tube, the upper end is anchored in the upper surface of steel tower tube L-type flange, lower end
It is anchored in the lower anchor slab that top thickeies linkage section bottom surface.
6. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 1, feature
Be: the prestressing force summation of the vertical prestressing bolt between adjacent segment concrete tower segments and concrete tower intersegmental part are pre-
The stretching force summation of stress rib is equal, to guarantee between concrete tower segments in the continuity of junction internal force.
7. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 3, feature
Be: the concrete tower fragment reserves arc-shaped PVC bolt duct along horizontal circumferential direction, and the horizontal curved bolt of prestressing force passes through institute
Arc-shaped PVC bolt duct is stated, oral area of the concrete tower fragment inner wall in arc-shaped PVC bolt duct is equipped with horizontal prestressing force
The nut of curved bolt installation operates groove.
8. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 7, feature
Be: the size of nut operation groove meets the perforation stroke of horizontal curved bolt, and nut operates groove end face and arc-shaped PVC spiral shell
The tangential direction in keyhole road is vertical.
9. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 7, feature
Be: the both ends of the horizontal curved bolt of prestressing force are anchored at the anchor slab closed with nut operation groove ends face paste.
10. a kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure according to claim 1, feature
Be: vertical prestressing bolt, the curved bolt of horizontal prestressing force and anchor bolt carry out preservative treatment, when perps and horizontal joint splice
Edge joint position smears waterproof gasket cement.
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| CN201910206036.8A CN109930892A (en) | 2019-03-19 | 2019-03-19 | A kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure |
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| CN201910206036.8A CN109930892A (en) | 2019-03-19 | 2019-03-19 | A kind of pre-tensioning system fragment prefabricated prestressing concrete tower structure |
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| CN112412707A (en) * | 2020-12-01 | 2021-02-26 | 重庆大学 | Assembled wind turbine generator system circle cross section concrete bearing structure |
| CN113374646A (en) * | 2021-06-16 | 2021-09-10 | 重庆大学 | Light steel concrete prestressing force combination formula wind power tower section of thick bamboo and wind power tower thereof |
| CN113494425A (en) * | 2020-04-07 | 2021-10-12 | 上海夏凯建筑科技有限公司 | Tower and tower member |
| WO2022037219A1 (en) * | 2020-08-21 | 2022-02-24 | 中国电建集团华东勘测设计研究院有限公司 | Grouting-free dry-type prestressed bolt segment-assembled prefabricated concrete tower |
| CN115369914A (en) * | 2022-08-10 | 2022-11-22 | 上海建工七建集团有限公司 | Tower crane assembled retaining wall structure and construction method thereof |
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