CN111287457B - Construction method of anchoring tower barrel section - Google Patents
Construction method of anchoring tower barrel section Download PDFInfo
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- CN111287457B CN111287457B CN201811488958.4A CN201811488958A CN111287457B CN 111287457 B CN111287457 B CN 111287457B CN 201811488958 A CN201811488958 A CN 201811488958A CN 111287457 B CN111287457 B CN 111287457B
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- 238000004873 anchoring Methods 0.000 title claims abstract description 133
- 238000010276 construction Methods 0.000 title claims abstract description 38
- 239000004567 concrete Substances 0.000 claims abstract description 51
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 238000009415 formwork Methods 0.000 claims description 71
- 238000005266 casting Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000009417 prefabrication Methods 0.000 abstract description 4
- 238000004513 sizing Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 8
- 235000017491 Bambusa tulda Nutrition 0.000 description 8
- 241001330002 Bambuseae Species 0.000 description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 8
- 239000011425 bamboo Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method of an anchoring tower barrel section, which comprises the following steps: s1: processing and manufacturing a vertical corrugated pipe and a Y-shaped corrugated pipe, wherein the Y-shaped corrugated pipe comprises a main pipe and a branch pipe connected to the main pipe, and the branch pipe is connected with the top of the main pipe in a manner of being adjacent to the top of the main pipe; s2: binding reinforcing steel bars, erecting a template to construct a pouring cavity, and vertically erecting a vertical corrugated pipe and a Y-shaped corrugated pipe in the pouring cavity, wherein the bottoms of the vertical corrugated pipe and the Y-shaped corrugated pipe are both arranged towards the bottom of the pouring cavity, the tops of the vertical corrugated pipe and the Y-shaped corrugated pipe are both arranged towards the top of the pouring cavity, and the top of the branch pipe is closer to the central axis of the anchoring tower barrel section relative to the top of the main pipe; s3: pouring concrete in the pouring cavity; s4: and after the poured concrete is hardened to form the anchoring tower cylinder section, removing the template, wherein the cylinder wall of the anchoring tower cylinder section is formed by the template plate wall. The construction method is simple, can be used for prefabrication and is convenient to hoist, and the tower barrel with the finished product can enhance local loading force and support the tower crane device.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a construction method of an anchoring tower barrel section.
Background
With the increase of the generating efficiency of the fan, the length of the blade is longer and longer, and the height and the section size of the fan tower matched with the blade are also increased continuously. The steel structure tower barrel is high in cost and difficult to transport, so that the construction requirement of the large-section high tower barrel is difficult to meet. The precast concrete tower barrel can economically build a large-scale wind generating set, so that the precast concrete tower barrel is widely concerned. Due to transportation and prefabrication constraints, a single large section tower is often assembled on site from multiple curved segments. And then sequentially hoisting the assembled tower cylinders from bottom to top, and finally constructing the complete concrete tower cylinder.
The height of the traditional tower is generally 80-120 m, and the wind power generation can generate higher power generation efficiency due to higher wind speed at high altitude, so that the height of the tower needs to be increased, and the hoisting difficulty is increased. When a tower cylinder with extremely high hoisting height is hoisted, a tower crane device with the matched height is needed to be used, and the tower crane device with extremely high height is extremely easy to be inclined in the hoisting process. In order to increase the stability of tower crane device, when one or more concrete tower section of thick bamboo was built and is accomplished, utilize to hold up arm bearing structure and link together concrete tower section of thick bamboo and tower crane device to realize the support of concrete tower section of thick bamboo to the tower crane device, thereby avoid the tower crane device to turn on one's side. However, in the prior art, when the tower crane device is supported by the connecting device arranged on the tower drum, the supporting part of the tower drum generates more lateral loads, so that the tower drum is stressed intensively and is easy to deform, and the structural reinforcement is needed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the construction method of the anchoring tower barrel section is easy to implement and suitable for prefabrication, and the prefabricated anchoring tower barrel section can improve local loading force and support a tower crane device after being hoisted on a tower barrel.
The construction method for anchoring the tower barrel section according to the embodiment of the invention comprises the following steps: s1: processing and manufacturing a vertical corrugated pipe and a Y-shaped corrugated pipe, wherein the Y-shaped corrugated pipe comprises a main pipe and a branch pipe connected to the main pipe, and the branch pipe is connected with the top of the main pipe in a manner of being adjacent to the top of the main pipe; s2: binding reinforcing steel bars, erecting a template to construct a pouring cavity, wherein the template comprises an inner template and an outer template which are opposite, the reinforcing steel bars are positioned between the inner template and the outer template, and the vertical corrugated pipe and the Y-shaped corrugated pipe are vertically erected in the pouring cavity, wherein the bottoms of the vertical corrugated pipe and the Y-shaped corrugated pipe are both arranged towards the bottom of the pouring cavity, the top of the vertical corrugated pipe is arranged towards the top of the pouring cavity, the tops of the main pipe and the branch pipe in the Y-shaped corrugated pipe are both arranged towards the top of the pouring cavity, and the top of the branch pipe is closer to the central axis of the anchoring tower barrel section relative to the top of the main pipe; s3: pouring concrete in the pouring cavity; s4: and after the poured concrete is hardened to form an anchoring tower cylinder section, removing the template, wherein the surface formed by the inner template on the anchoring tower cylinder section is the inner peripheral wall of the anchoring tower cylinder section, and the surface formed by the outer template on the anchoring tower cylinder section is the outer peripheral wall of the anchoring tower cylinder section.
According to the construction method of the anchoring tower barrel section, the vertical corrugated pipe and the Y-shaped corrugated pipe are respectively preset in the pouring cavity before pouring, after pouring is completed, the vertical corrugated pipe and the Y-shaped corrugated pipe respectively form two pre-stressed ducts, one pre-stressed duct linearly penetrates through the top and the bottom of the pouring cavity, the other pre-stressed duct forms certain staggered bending and is provided with branch ducts, and anchoring and prestress application are facilitated in the later construction process. The method can be used for prefabrication, namely, the required anchoring tower cylinder section is prefabricated, demolded and conveyed to a factory, and then is hoisted and spliced with other tower cylinder sections. The tower section of thick bamboo that is equipped with finished product anchor tower section of thick bamboo multiplicable local load capacity can be used to the higher tower crane device of support height, prevents that it from turning on one's side.
According to the construction method of the anchoring tower barrel section, a part of the inner formwork adjacent to the top protrudes towards one side far away from the outer formwork to form an inner convex cavity, and the branch pipe extends into the inner convex cavity.
According to a further embodiment of the invention, the top of the branch pipe is arranged towards the top wall of the convex cavity.
According to the construction method of the anchoring tower cylinder section, the number of the vertical corrugated pipes and the number of the Y-shaped corrugated pipes are multiple, and the vertical corrugated pipes and the Y-shaped corrugated pipes are arranged at intervals along the circumferential direction of the anchoring tower cylinder section.
According to the construction method of the anchoring tower barrel section, one Y-shaped corrugated pipe is arranged between every two vertical corrugated pipes.
According to the construction method of the anchoring tower barrel section, the formwork comprises a top formwork, the top formwork forms the top wall of the pouring cavity, the top formwork is provided with a first fixing column and a second fixing column which are arranged towards the pouring cavity, the top of the vertical corrugated pipe is sleeved and fixed on the first fixing column in the step S2, the top of the main pipe is sleeved and fixed on the second fixing column, and after the formwork is removed in the step S4, the first fixing column and the second fixing column are pulled out from the hardened anchoring tower barrel section.
According to a further embodiment of the present invention, the top form is further provided with a third fixing post, the third fixing post is located on the top wall of the inward convex cavity, the top of the branch pipe is sleeved and fixed on the third fixing post in step S2, and the third fixing post is pulled out from the hardened anchoring tower barrel section after the form is removed in step S4.
According to the construction method of the anchoring tower barrel section, the anchoring tower barrel section is a prefabricated member, the formwork comprises a bottom formwork, the bottom formwork forms the bottom wall of the pouring cavity, a fourth fixing column and a fifth fixing column are arranged on the bottom formwork and face the pouring cavity, the bottom of the vertical corrugated pipe is sleeved and fixed on the fourth fixing column in a sleeved mode, the bottom of the Y-shaped corrugated pipe is sleeved and fixed on the fifth fixing column in a sleeved mode, and after the formwork is removed in the step S4, the fourth fixing column and the fifth fixing column are pulled out of the hardened anchoring tower barrel section.
According to the construction method of the anchoring tower barrel section, in the step S2, the bound steel bars form a first sizing cage and a second sizing cage, the vertical corrugated pipe is located in the first sizing cage, and the Y-shaped corrugated pipe is located in the second sizing cage.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of the general structure of a concrete tower according to an embodiment of the present invention.
Fig. 2 is a schematic view of a casting structure of an anchoring tower tube section according to an embodiment of the present invention (the steel reinforcement forming cage is omitted).
Fig. 3 is a schematic view of a casting structure of a jointed tower segment according to an embodiment of the present invention (the reinforcement cage is omitted).
Fig. 4 is a schematic longitudinal sectional view of a concrete tower according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of an anchoring tower segment according to an embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view of a junction tower section according to one embodiment of the present invention.
Fig. 7 is a schematic diagram illustrating support of a tower crane device by a concrete tower drum during a hoisting construction process according to an embodiment of the invention.
Reference numerals are as follows:
a concrete tower tube 1000;
anchoring the tower section 100;
an inner convex edge 20;
a pre-stressed duct 30; the first pre-stressed duct 31; a branch duct 32; a vertical corrugated tube 33; a Y-shaped bellows 34; a main tube 341; a branch pipe 342;
a tower section 200; engaging the tower section 210;
an anchoring device 40;
a second pre-stressed duct 50; a bellows 51;
a template 400;
an inner template 410; an outer template 420; a top mold plate 430; a bottom mold plate 440;
a pouring cavity 401; an inner convex cavity 402;
a first fixing column 510; a second fixing column 520; a third fixing column 530; a fourth fixing post 540; a fifth fixing post 550; a tower foundation 600;
a tower crane apparatus 2000;
a tower crane foundation 710; a tower crane body 720; a longitudinal truss 721; a horizontal truss 722;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The structure of an anchoring tower section 100, a concrete tower 1000, of an embodiment of the present invention is described first with reference to fig. 1, 4-6, 7.
The structure of the concrete tower drum 1000 includes a tower drum foundation 600 and a tower drum body, in some application fields, a wind turbine or the like (for example, a wind power generation tower) is installed on the top of the tower drum body, and in some application fields, various monitoring devices (for example, a meteorological monitoring tower, an astronomical observation tower or the like) are installed on the top of the tower drum body. These concrete towers 1000 have a high body, some of them are up to hundreds of meters, and they cannot be poured in one step. It is common practice to divide the tower body into a plurality of tower segments 200, as shown in FIG. 1, and build the plurality of tower segments 200 one segment after another from bottom to top. In addition, when the concrete tower tube 1000 with such a high tube body is constructed, the tower crane device 2000 with a higher tower body needs to be configured, and the extremely high tower crane device 2000 is very easily affected by wind force to shake or even turn over during the hoisting process, so that the tower crane device 2000 needs to be supported during the hoisting process. After the tower crane device 2000 is connected with the concrete tower drum 1000 by using the supporting arm structure 3000, a great lateral load force is generated on the concrete tower drum 1000, and cracks are easily generated at the joint of the concrete tower drum 1000 due to insufficient strength.
The tower tube sections 200 are prefabricated in advance, that is, the tower tube sections 200 are cast and formed in advance by a casting plant, transported to a construction site, and sequentially hoisted on the tower tube foundation 600. For each tower section 200, the ring can be directly cast, or cast into a sheet shape, and then the ring can be spliced along the circumferential direction. Here, the ring shape includes not only a circular ring shape but also a polygonal ring shape such as a quadrangle, a hexagon, and the like.
For prefabricated tower section 200, need use the tower crane device with tower section 200 hoist and mount to tower section 200 that has taken, impact force is great in tower section 200's the installation.
In the concrete tower 1000 according to the embodiment of the present invention, the prestressed cables are installed in a body, that is, the prestressed duct 30 is formed in the tower section 200, and the prestressed cables pass through the tower section 200 and are anchored at both ends.
As shown in fig. 1, when a concrete tower drum 1000 has a plurality of tower drum sections 200, and the tower drum body is high, and the tower crane apparatus 2000 for hoisting each tower drum section 200 is extremely high, an anchoring tower drum section 100 is added at one third of the height of the tower drum body in the construction, and a part of prestressed cables are stretched to the anchoring tower drum section 100 to increase the load bearing capacity at the position, and a supporting arm structure 3000 is arranged on the anchoring tower drum section 100 or the tower drum section 200 adjacent to the anchoring tower drum section 100 to connect the tower crane apparatus 2000, so as to support the tower crane apparatus 2000 and prevent the tower crane apparatus 2000 from side-turning; and continuously hoisting to two thirds of the tower barrel body, additionally arranging an anchoring tower barrel section 100, stretching a part of the prestressed cable again, and connecting another supporting arm structure 3000 to the anchoring tower barrel section 100 and the tower crane device 2000 so as to further support the tower crane device 2000. After all the tower drum sections 200 are erected, the tower drum body is pulled up from top to bottom to form the prestressed cables. In addition, the tower crane apparatus 2000 and the jib structure 3000 are removed respectively, and the local prestressed cables corresponding thereto can be removed correspondingly. For example, in a specific example, the concrete tower 1000 has 25 tower segments 200, and the first prestressed cable, the second prestressed cable and the third prestressed cable are required to be respectively pulled at the 10 th tower segment 200, the 17 th tower segment 200 and the 25 th tower segment 200 from bottom to top. After the 10 th tower segment 200 is built, the first prestressed cable is inserted into the prestressed duct of the built 10 tower segments 200, the top of the first prestressed cable extends to the top of the 10 th tower segment 200, and the bottom of the first prestressed cable extends to the tower foundation 600. The first pre-stressed cable may then be straightened by machine and then secured at both ends by the anchor 40. After the fixing, the first prestressed cable is still in a stretched state, so that the first prestressed cable applies prestress to the 10 tower tube sections 200, the 10 tower tube sections 200 have prestress to be connected into a whole, one end of the arm supporting structure 3000 can be connected to the 10 th tower tube section 200, or the tower tube section 200 adjacent to the 10 th tower tube section 200, and the other end of the arm supporting structure 3000 is connected to the tower crane device 2000. Then, a new tower segment 200 is built on the 10 th tower segment 200, and after the tower segment 200 reaches the 17 th tower segment 200, a second prestressed cable is pulled from the 17 th tower segment 200 to the tower foundation 600 according to the above-mentioned manner, the top of the second prestressed cable is fixed on the 17 th tower segment 200 through the anchoring device 40, the bottom of the second prestressed cable is fixed on the tower foundation 600 through the anchoring device 40, so that the 17 tower segments 200 are prestressed and connected into a whole, at this time, another supporting arm structure 3000 can be connected on the 17 th tower segment 200 and the adjacent tower segment 200, and is connected with the tower crane 2000 through the supporting arm structure 3000. Thereafter, a new tower segment 200 is built on the 17 th tower segment 200 until after the 25 th tower segment 200, and a third prestressed cable is fixed between the top and the tower foundation 600 as described above.
It should be noted that, the anchoring device 40 and the anchoring manner of the prestressed cable are all the prior art, and are not described herein again.
In the above example, the 10 th and 17 th tower segments 200 are each provided with an anchoring device 40. In the embodiment of the present invention, the anchored tower cylinder section 100 is equivalent to the 10 th tower cylinder section 200 or the 17 th tower cylinder section 200 in the above example, the tower cylinder section 200 may be anchored with a pre-anchored pre-stressed cable, and the anchoring position of the pre-anchored pre-stressed cable is avoided from the connection of the tower cylinder sections 200, so as to avoid the formation of a groove on the tower cylinder section 200, and the concrete tower cylinder 1000 provided with the anchored tower cylinder section 100 increases a local load, which is beneficial to supporting the tower crane apparatus 2000 during the hoisting construction process, and preventing the tower crane apparatus 2000 from side-tipping.
Specifically, as shown in fig. 4 and 5, a first prestressed duct 31 and a branch duct 32 are provided in the anchoring cylinder section 100, the first prestressed duct 31 vertically penetrates through the anchoring cylinder section 100, and the branch duct 32 is bent toward the inner peripheral wall of the anchoring cylinder section 100 at a certain angle on the half way that the first prestressed duct 31 penetrates through the anchoring cylinder section 100 from bottom to top, and then penetrates out from the top of the anchoring cylinder section 100. Thus, the branch passage 32 is used for passing the prestressed cable to be anchored on the anchoring tower section 100, and the first prestressed passage 31 is used for passing other prestressed cables.
A construction method of the anchoring tower section 100 according to the embodiment of the present invention will be described with reference to fig. 2 to 7.
The construction method of the anchoring tower barrel section according to the embodiment of the invention comprises the following steps:
s1: the vertical corrugated pipe 33 and the Y-shaped corrugated pipe 34 are manufactured, the Y-shaped corrugated pipe 34 comprises a main pipe 341 and a branch pipe 342 connected to the main pipe 341, and the branch pipe 342 is connected adjacent to the top of the main pipe 341.
S2: and (2) binding reinforcing steel bars, erecting a formwork 400 and constructing a casting cavity 401 (the casting cavity 401 is shown in fig. 2), wherein the formwork 400 comprises an inner formwork 410 and an outer formwork 420 which are opposite, and the reinforcing steel bars are positioned between the inner formwork 410 and the outer formwork 420.
The vertical corrugated pipe 33 and the Y-shaped corrugated pipe 34 are vertically supported in the casting cavity 401, wherein the bottom of the vertical corrugated pipe 33 and the bottom of the Y-shaped corrugated pipe 34 are both arranged towards the bottom of the casting cavity 401.
The top of the vertical bellows 33 is disposed toward the top of the casting cavity 401, and the tops of the main tube 341 and the branch tube 342 of the Y-shaped bellows 34 are both disposed toward the top of the casting cavity 401, and the top of the branch tube 342 is closer to the central axis of the anchoring tower cylinder section 100 than the top of the main tube 341.
S3: concrete is poured in the pouring cavity 401.
S4: after the poured concrete is hardened to form the anchoring tower cylinder section 100, the formwork 400 is removed, the surface formed by the inner formwork 410 on the anchoring tower cylinder section 100 is the inner peripheral wall of the anchoring tower cylinder section 100, and the surface formed by the outer formwork 420 on the anchoring tower cylinder section 100 is the outer peripheral wall of the anchoring tower cylinder section 100. The removed inner formwork 410 and the outer formwork 420 can be continuously used in the next pouring, so that materials are saved, and the appearance of the anchoring tower cylinder section 100 is uniform.
The steel bars bound in the step S2 and concrete form a reinforced concrete structure finally, so that the finished product of the anchoring tower cylinder section 100 has stronger tensile stress resistance and pressure resistance; in addition, the banded steel bars can also provide support for the embedded parts and the fixing parts thereof.
The casting cavity 401 formed by the formwork 400 determines the shape of the formed anchoring tower tube section 100. When the inner formwork 410 and the outer formwork 420 selected in the step S2 are erected, the inner formwork can be formed by splicing a plurality of pieces, or can be integrally formed formwork pieces, and the sealing performance and the flatness of the whole surface of the inner formwork 410 and the outer formwork 420 are ensured so as to prevent concrete from leaking outwards in the subsequent pouring process and prevent the wall surface of the anchoring tower cylinder section 100 from being uneven;
the inner formwork 410 and the outer formwork 420 selected in the step S2 have certain strength, so that the casting cavity 401 can be prevented from being deformed during subsequent concrete casting.
In step S2, the relative position relationship between the inner mold plate 410 and the outer mold plate 420 should be kept fixed, and the fixing method may be combined with other connecting plates to form the inner mold plate 410 and the outer mold plate 420 with a constant relative distance, or other supporting members and limiting members may be supported at the outer sides of the inner mold plate 410 and the outer mold plate 420 to limit the relative position relationship between the inner mold plate 410 and the outer mold plate 420.
In step S4, after the formwork 400 is removed, the vertical corrugated pipe 33 and the Y-shaped corrugated pipe 34 are still buried in the concrete, that is, the vertical corrugated pipe 33 and the Y-shaped corrugated pipe 34 are embedded parts. After pouring, the first pre-stressed duct 31 is formed at the vertical corrugated pipe 33, the bottom of the first pre-stressed duct 31 is communicated with the bottom wall of the anchoring tower cylinder section 100, and the top of the first pre-stressed duct 31 is communicated with the top wall of the anchoring tower cylinder section 100. After pouring, a first prestressed duct 31 with a branch duct 32 at the upper part is formed at the position of the Y-shaped corrugated pipe 34, the top of the branch duct 32 is communicated to the top wall of the anchoring tower cylinder section 100, and the top of the branch duct 32 is closer to the central axis of the anchoring tower cylinder section 100 than the top of the first prestressed duct 31.
Here, since the Y-shaped corrugated pipe 34 is a kind of corrugated pipe, the branch duct 32 having a right angle bending angle and branching from the first pre-stressed duct 31 may be directly formed on the top of the anchoring tower section 100 of the Y-shaped corrugated pipe 34, and an arc-shaped bent branch duct 32 may also be formed, which is not limited herein.
It will be understood that the above construction method can be used to prefabricate the anchor tower segment 100, and the desired anchor tower segment 100 is prefabricated, demolded, transported to the site, hoisted, and spliced with other tower segments 200.
In some embodiments of the present invention, as shown in FIG. 2, a portion of the inner die plate 410 adjacent the top projects toward a side away from the outer die plate 420 to form an inner relief cavity 402, and the branch 342 projects into the inner relief cavity 402. The inner convex cavity 402 has a greater radial width than the lower casting cavity 401, where the convex inner convex cavity 402 forms the inner convex edge 20 after the concrete is cast in the future. The anchoring cylinder section 100 thus constructed has an inner circumferential wall formed with an inner flange 20, and the branched duct 32 is formed to extend to the inner flange 20, so that the pre-anchored prestressing cable can be anchored thereto by the anchoring device 40. Here, the inner circumferential wall of the anchoring cylinder section 100 is provided with the inner convex edge 20, which can enhance the structural strength of the anchoring cylinder section 100 itself and facilitate the anchoring of the prestressed cable. Can promote local loading power to connect and hold up arm structure 3000 and tower crane device 2000, conveniently support tower crane device 2000.
Optionally, the bottom of the convex-inward cavity 402 extends upward from the upper inner wall of the casting cavity 401, and the top of the convex-inward cavity 402 extends away from the outer wall of the casting cavity 401. That is, the thickness of the inner convex cavity 402 gradually increases from bottom to top. The wide top interior convex cavity 402 facilitates casting of concrete.
Optionally, the top of the main tube 341 of the Y-shaped bellows 34 is disposed towards the top of the casting cavity 401. Here, a first prestressed duct 31 whose top is communicated with the outside may be formed after casting, and during construction, a prestressed cable is additionally installed in the first prestressed duct 31 and is inserted into the second prestressed duct 50 of the upper tower tube section 200, thereby enhancing the stability of the whole concrete tower tube 1000.
Alternatively, as shown in FIG. 2, the top of branch 342 is disposed toward the top wall of convex chamber 402. Here, a branch duct 32 with the top communicated with the outside can be formed after pouring, and in the construction process, a prestressed cable is additionally arranged in the branch duct 32, can be anchored on the inner ledge 20 formed by the inner convex cavity 402, and is convenient to detach after the construction is finished.
Of course, in other embodiments of the present invention, the inner form 410 may not have the inner convex cavity 402 formed thereon, so that the inner circumferential wall of the anchoring tower cylinder section 100 does not have the inner convex edge 20 formed thereon. Thus, the top of the branch 342 of the Y-shaped bellows 34 is disposed directly toward the inner formwork 410, the top of the branch duct 32 is disposed directly on the inner circumferential wall of the anchoring tower cylinder section 100, and the anchoring device 40 is fixed directly on the inner circumferential wall of the anchoring tower cylinder section 100.
In some embodiments of the present invention, as shown in fig. 2, each of the vertical bellows 33 and the Y-shaped bellows 34 is plural, and the plural vertical bellows 33 and the plural Y-shaped bellows 34 are arranged at intervals along the circumference of the anchor tower section 100. The number of the first prestressed ducts 31 formed after casting is the total number of the vertical corrugated pipes 33 and the Y-shaped corrugated pipes 34, and the number of the branch ducts 32 is the same as the number of the Y-shaped corrugated pipes 34. The plurality of vertical bellows 33 and the plurality of Y-shaped bellows 34 ensure that the anchoring tower section 100 formed after casting has the prestressed duct 30 with sufficient prestressing force.
Optionally, a Y-shaped bellows 34 is provided between each two vertical bellows 33. The position of the Y-shaped corrugated pipe 34 is consistent with the position of the part of the first prestressed duct 31 and each branch duct 32 which are required to be formed after casting.
When all the tower segments 200 are built (for example, after the 25 th tower segment 200 is built in the above example), the pre-anchored pre-stressed cables can be removed, and then the pre-stressed cables are stretched between the top-most tower segment 200 and the tower foundation 600, so that the pre-stressed cables can be saved. In the embodiment of the invention, because the prestressed cable anchored in advance, the fixed anchoring device 40 is not positioned at the joint of two adjacent tower cylinder sections 200 any more, but is positioned on the inner peripheral side of the tower cylinder sections 200, so that the prestressed cable anchored in advance is very convenient to remove.
Alternatively, the number of the vertical corrugated pipes 33 and the number of the Y-shaped corrugated pipes 34 are both an even number, and the vertical corrugated pipes 33 are symmetrically arranged with each other in the casting cavity 401, and the Y-shaped corrugated pipes 34 are symmetrically arranged with each other in the casting cavity 401. The prestressed cable can be symmetrically tensioned, and the stress balance of the anchoring tower cylinder section 100 can be ensured. Of course, the number of the vertical bellows 33 and the Y-shaped bellows 34 may be an odd number, or may be asymmetrically disposed in the casting cavity 401.
In some embodiments of the present invention, as shown in FIG. 2, the form 400 includes a top form 430, the top form 430 constructing a top wall of the casting cavity 401. The top form 430 may connect the inner form 410 and the outer form 420 disposed at opposite ends, such that the upper portion of the casting cavity 401 is not easily deformed, and the top of the formed anchoring tower barrel section 100 may be flat. Facilitating the connection between the anchoring drum segment 100 and the drum segment 200 above it.
The top form 430 is provided with a first fixing column 510 and a second fixing column 520 which are arranged towards the casting cavity 401, and the top of the vertical corrugated pipe 33 is sleeved and fixed on the first fixing column 510 in step S2, so that when concrete is cast, the position of the vertical corrugated pipe 33 is prevented from being inclined, and the top of the vertical corrugated pipe 33 slightly protrudes out of the top form 430, so that the top of the vertical corrugated pipe 33 is conveniently connected with the corrugated pipe 51 of the tower-barrel section 200 on the upper portion of the top form.
The top of the main pipe 341 is fixed to the second fixing post 520, so that the main pipe 341 of the Y-shaped corrugated pipe 34 is prevented from being tilted when concrete is poured, and the top of the Y-shaped corrugated pipe 34 slightly protrudes from the top form 430.
After the template 400 is removed in step S4, the first fixing posts 510 and the second fixing posts 520 are pulled out from the hardened anchoring cylinder section 100. The first fixing column 510 and the second fixing column 520 after being pulled out can be continuously used in the follow-up process, and consumables are saved. At the same time, the splicing of the anchoring drum section 100 with the upper drum section 200 is not hindered.
Optionally, a third fixing post 530 is disposed on the top mold plate 430, the third fixing post 530 is located on the top wall of the convex cavity 402, and the top of the branch pipe 342 is sleeved and fixed on the third fixing post 530 in step S2. In this way, when concrete is poured, the branch pipes 342 of the Y-shaped corrugated pipe 34 are ensured to be bent and extended toward the inner formwork 410, and the top of the Y-shaped corrugated pipe 34 is ensured to be fixed on the top formwork 430.
After the mold plate 400 is removed in step S4, the third fixing posts 530 are pulled out from the hardened anchoring cylinder segment 100. The third fixing column 530 after being pulled out can be continuously used in the subsequent process, so that the consumable material is saved. At the same time, the splicing of the anchoring drum section 100 with the upper drum section 200 is not hindered.
In some embodiments of the present invention, the anchoring tower section 100 is a prefabricated member, and the formwork 400 includes a bottom formwork 440, the bottom formwork 440 constructing a bottom wall of the casting cavity 401. The bottom template 440 can be connected with the inner template 410 and the outer template 420 which are arranged at two opposite ends, so that the lower part of the pouring cavity 401 is not easy to deform, and concrete is not easy to leak out from the bottom; the anchoring cylinder section 100 is formed with a flat bottom and a specific shape to facilitate the connection of the anchoring cylinder section 100 to the lower coupling cylinder section 210. Here, the tower sections 200 above and below the anchored tower section 100, the tower sections 200 not requiring the anchored prestressed cables are referred to as engaged tower sections 210.
The bottom form 440 is provided with a fourth fixing column 540 and a fifth fixing column 550 which are arranged towards the casting cavity 401, the bottom of the vertical corrugated pipe 33 is sleeved and fixed on the fourth fixing column 540 in the step S2, and the bottom of the Y-shaped corrugated pipe 34 is sleeved and fixed on the fifth fixing column 550. In this way, when concrete is poured, the fourth fixing column 540 and the first fixing column 510 cooperate together to prevent the position of the vertical corrugated pipe 33 from being inclined, and to extend the bottom of the vertical corrugated pipe 33 toward the bottom form 440; the cooperation of the fifth fixing post 550 and the second fixing post 520 ensures that the bottom of the Y-shaped corrugated pipe 34 extends toward the bottom mold plate 440, thereby preventing the Y-shaped corrugated pipe 34 from being skewed.
After the template 400 is removed in step S4, the fourth fixing posts 540 and the fifth fixing posts 550 are pulled out from the hardened anchoring cylinder section 100. The pulled fourth fixing column 540 and the pulled fifth fixing column 550 can be continuously used in the follow-up process, so that consumables are saved. At the same time, the splicing of the anchoring drum segment 100 with the lower drum segment 200 is not hindered.
In the present invention, the features defined as "first", "second", "third", "fourth" and "fifth" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.
In some embodiments of the invention, in step S2, the tied rebar is formed with a first sizing cage and a second sizing cage (not shown), the vertical bellows 33 being located within the first sizing cage, and the Y-shaped bellows 34 being located within the second sizing cage. The first sizing cage and the second sizing cage have certain limiting and supporting functions, and local bearing strength and tolerance are enhanced.
To better understand the solution of the embodiment of the present invention, the construction method of the anchoring tower tube section 100 of the embodiment of the present invention is described below by specific examples.
In the embodiment, the anchoring tower drum section 100 and the joint tower drum section 210 are built in a prefabricated mode, and are hoisted and spliced on a construction site to form the concrete tower drum 1000.
As shown in fig. 2, when the anchoring tower barrel section 100 is prefabricated, the construction method adopted is as follows:
s1: the vertical corrugated pipe 33 and the Y-shaped corrugated pipe 34 are manufactured, the Y-shaped corrugated pipe 34 comprises a main pipe 341 and a branch pipe 342 connected to the main pipe 341, and the branch pipe 342 is connected adjacent to the top of the main pipe 341.
S2: binding reinforcing steel bars, wherein the bound reinforcing steel bars form a first sizing cage and a second sizing cage, the vertical corrugated pipe 33 is positioned in the first sizing cage, and the Y-shaped corrugated pipe 34 is positioned in the second sizing cage; a Y-shaped bellows 34 is provided between each two vertical bellows 33. Erecting a pouring cavity 401 by a formwork 400 (the pouring cavity 401 is shown in fig. 2), wherein the formwork 400 comprises an inner formwork 410 and an outer formwork 420 which are opposite, a top formwork 430 and a bottom formwork 440, a first fixing column 510 and a second fixing column 520 which are arranged towards the pouring cavity 401 are arranged on the top formwork 430, a part of the inner formwork 410 adjacent to the top is protruded towards one side far away from the outer formwork 420 to form an inner convex cavity 402, a branch pipe 342 extends into the inner convex cavity 402, and a third fixing column 530 is arranged on the top wall of the inner convex cavity 402; the bottom template 440 constructs a bottom wall of the pouring cavity 401, and a fourth fixing column 540 and a fifth fixing column 550 which face the pouring cavity 401 are arranged on the bottom template 440; the reinforcing steel bars and the first and second forming cages formed by the reinforcing steel bars are positioned between the inner formwork 410 and the outer formwork 420, the top of the vertical corrugated pipe 33 is sleeved and fixed on the first fixing column 510, the top of the main pipe 341 is sleeved and fixed on the second fixing column 520, the top of the branch pipe 342 is sleeved and fixed on the third fixing column 530, the bottom of the vertical corrugated pipe 33 is sleeved and fixed on the fourth fixing column 540, and the bottom of the Y-shaped corrugated pipe 34 is sleeved and fixed on the fifth fixing column 550.
S3: concrete is poured in the pouring cavity 401.
S4: after the poured concrete is hardened to form the anchoring tower cylinder section 100, removing the template 400, wherein the surface formed by the inner template 410 on the anchoring tower cylinder section 100 is the inner peripheral wall of the anchoring tower cylinder section 100, the surface formed by the outer template 420 on the anchoring tower cylinder section 100 is the outer peripheral wall of the anchoring tower cylinder section 100, the surface formed by the top template 430 on the anchoring tower cylinder section 100 is the top wall of the anchoring tower cylinder section 100, and the surface formed by the bottom template 440 on the anchoring tower cylinder section 100 is the bottom wall of the anchoring tower cylinder section 100; and simultaneously, respectively pulling out a first fixed column 510, a second fixed column 520, a third fixed column 530, a fourth fixed column 540 and a fifth fixed column 550 from the hardened anchoring tower barrel section 100.
As shown in fig. 3, when the joining tower cylinder section 210 at the lower part of the anchoring tower cylinder section 100 is prefabricated, the construction method is as follows:
p1: the bellows 51 are machined to correspond to the total number of vertical bellows 33 and Y-shaped bellows 34 of the anchor drum segment 100.
P2: binding reinforcing steel bars, wherein the bound reinforcing steel bars form a third sizing cage which is consistent with the total quantity and the position of the first sizing cage and the second sizing cage in the anchoring tower barrel section 100, and the corrugated pipe 51 is vertically supported in the third sizing cage; erecting a second template to construct a second pouring cavity, wherein the second template comprises a second inner template and a second outer template which are opposite to each other, and a second top template and a second bottom template, first fixing columns 510 (corresponding to the number and positions of the fourth fixing columns 540 and the fifth fixing columns 550 when the anchoring tower barrel section 100 is manufactured) which are arranged towards the second pouring cavity are arranged on the second top template, fourth fixing columns 540 which are arranged towards the second pouring cavity are arranged on the bottom template 440, and the number of the fourth fixing columns 540 is the same as that of the first fixing columns 510 on the second top template; the reinforcing steel bars and the third sizing cage formed by the reinforcing steel bars are located between the second inner formwork and the second outer formwork, the bottom of the corrugated pipe 51 is arranged towards the bottom of the second pouring cavity, the bottom of the corrugated pipe 51 is sleeved and fixed on the fourth fixing column 540, the top of the corrugated pipe 51 is arranged towards the top of the second pouring cavity, and the top of the corrugated pipe 51 is sleeved and fixed on the first fixing column 510.
P3: and pouring concrete in the second pouring cavity.
P4: after the poured concrete is hardened to form the lower joint tower-barrel section 210, removing the second formwork, wherein the surface formed by the second inner formwork is the inner peripheral wall of the joint tower-barrel section 210, the surface formed by the second outer formwork is the outer peripheral wall of the joint tower-barrel section 210, the surface formed by the second top formwork is the top wall of the joint tower-barrel section 210, and the surface formed by the second bottom formwork is the bottom wall of the joint tower-barrel section 210; simultaneously, the first fixing column 510 and the fourth fixing column 540 are respectively pulled out from the hardened engaging tower barrel section 210.
When the coupling tower cylinder section 210 at the upper part of the anchoring tower cylinder section 100 is prefabricated, the construction method is the same as the method of prefabricating the coupling tower cylinder section 210 at the lower part of the anchoring tower cylinder section 100.
As shown in fig. 1 and 4, a foundation 600 is manufactured, all prefabricated lower joint tower barrel sections 210 are respectively hoisted and jointed, a prefabricated anchoring tower barrel section 100 is hoisted at the third of the height of a concrete tower barrel 1000 and is connected with the lower joint tower barrel section 210, a prestressed cable is arranged in the lower joint tower barrel section 210 and the anchoring tower barrel section 100 in the early stage, part of the prestressed cable extends out from an inner convex edge 20 on the anchoring tower barrel section 100 and is fixed by an anchoring device 40, then the upper joint tower barrel section 210 is hoisted, and after all the joint tower barrel sections 210 are hoisted, the prestressed cable penetrating from the bottom to the top is anchored at the top of the concrete tower barrel 1000, and the construction of the concrete tower barrel 1000 is completed.
The following describes a construction method of a concrete tower drum 1000 according to an embodiment of the present invention by using fig. 1 and fig. 7, and illustrates a supporting function of the concrete tower drum 1000 on a tower crane apparatus 2000 during a hoisting construction.
S1: building a tower crane foundation 710 and a tower foundation 600 on the ground;
s2: the tower crane main body 720 is installed on a tower crane foundation 710, the tower crane main body 720 comprises a longitudinal truss 721 and a horizontal truss 722, the longitudinal truss 721 is vertically fixed on the tower crane foundation 710, the horizontal truss 722 is arranged along the horizontal direction and is connected to the longitudinal truss 721, a crane capable of sliding along the horizontal truss 722 is arranged on the horizontal truss 722, and the longitudinal truss 721 is installed to reach a first preset height;
s3: hoisting the prefabricated member to a tower drum foundation 600 by using a crane to form an annular tower drum section 200, wherein the tower drum section 200 is positioned on one horizontal side of a tower crane main body 720, the prefabricated member is annular or flaky, when the prefabricated member is flaky, a plurality of prefabricated members are hoisted to form an annular shape, and the central axis of the tower drum section 200 is vertically arranged;
s4: after each tower cylinder section 200 is hoisted, another tower cylinder section 200 is hoisted upwards until a tower cylinder main body is formed; wherein, at least one tower section of thick bamboo 200 is for holding up the arm tower section of thick bamboo, holds up and is connected with between arm tower section of thick bamboo and the longitudinal truss 721 and holds up arm structure 3000: wherein,
in step S4, after each arm supporting tower barrel section is hoisted, the arm supporting structure 3000 is installed first, and then another tower barrel section 200 is hoisted above the arm supporting tower barrel section; the supporting arm tower barrel section can be an anchoring tower barrel section 100 or a joint tower barrel section 210 connected with the anchoring tower barrel section 100, and an anchoring device 60 for fixing a prestressed cable is arranged on the anchoring tower barrel section 100; after each anchoring tower cylinder section 100 is hoisted, the prestressed cables are stretched and fixed between the anchoring device 60 and the tower cylinder foundation 600, and then the other tower cylinder section 200 is hoisted upwards.
S5: after the whole concrete tower tube 1000 is hoisted, the tower crane device 2000 and the arm supporting structure 3000 are removed, and the prestressed cable anchored on the anchoring tower tube section 100 is removed.
Because the tower crane device 2000 is higher, in the hoisting process, the supporting arm structure 3000 is installed to be connected with the tower crane device 2000 every time the concrete tower barrel 1000 with a certain distance is built, and the tower barrel section 200 provided with the supporting arm structure 3000 is the anchoring tower barrel section 100 or the joint tower barrel section 210 adjacent to the anchoring tower barrel section 100, so that a larger lateral load can be borne, and the stability of the tower crane device 2000 in the hoisting process is ensured.
In the description of the present invention, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "vertical," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Other constructions of the construction method for anchoring tower segments according to embodiments of the present invention, such as constructing the tower foundation 600, splicing between tower segments 200, pulling prestressed cables, etc., are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A construction method of an anchoring tower barrel section is characterized by comprising the following steps:
s1: processing and manufacturing a vertical corrugated pipe and a Y-shaped corrugated pipe, wherein the Y-shaped corrugated pipe comprises a main pipe and a branch pipe connected to the main pipe, and the branch pipe is connected with the top of the main pipe in a manner of being adjacent to the top of the main pipe;
s2: binding reinforcing steel bars, erecting a template to construct a pouring cavity, wherein the template comprises an inner template and an outer template which are opposite, the reinforcing steel bars are positioned between the inner template and the outer template, and the vertical corrugated pipe and the Y-shaped corrugated pipe are vertically erected in the pouring cavity, wherein the bottoms of the vertical corrugated pipe and the Y-shaped corrugated pipe are both arranged towards the bottom of the pouring cavity, the top of the vertical corrugated pipe is arranged towards the top of the pouring cavity, the tops of the main pipe and the branch pipe in the Y-shaped corrugated pipe are both arranged towards the top of the pouring cavity, and the top of the branch pipe is closer to the central axis of the anchoring tower barrel section relative to the top of the main pipe;
s3: pouring concrete in the pouring cavity;
s4: removing the template after the poured concrete is hardened to form an anchoring tower cylinder section, wherein the surface formed by the inner template on the anchoring tower cylinder section is the inner peripheral wall of the anchoring tower cylinder section, and the surface formed by the outer template on the anchoring tower cylinder section is the outer peripheral wall of the anchoring tower cylinder section;
when all tower sections are built, removing the pre-anchored prestressed cable, and then stretching the prestressed cable between the tower section at the top and the tower foundation;
a portion of the inner formwork adjacent the top projects towards a side remote from the outer formwork to form an inner convex cavity into which the branch pipe projects.
2. The method of constructing an anchored tower segment of claim 1, wherein the top of said leg is disposed toward the top wall of said convex cavity.
3. The method of constructing an anchor tower section according to claim 1, wherein the vertical bellows and the Y-shaped bellows are each provided in plurality, and the plurality of vertical bellows and the plurality of Y-shaped bellows are provided at intervals in a circumferential direction of the anchor tower section.
4. The method of constructing an anchored tower-barrel section according to claim 1, wherein one Y-shaped bellows is provided between every two vertical bellows.
5. The method of constructing an anchor tower-barrel section according to claim 1, wherein the formwork includes a top formwork, the top formwork forms a top wall of the casting cavity, the top formwork is provided with a first fixing post and a second fixing post disposed toward the casting cavity, the top of the vertical corrugated pipe is sleeved and fixed on the first fixing post in step S2, the top of the main pipe is sleeved and fixed on the second fixing post, and the first fixing post and the second fixing post are pulled out from the hardened anchor tower-barrel section after the formwork is removed in step S4.
6. The method of constructing an anchored tower-barrel section as claimed in claim 5, wherein said top formwork is further provided with a third fixing post, said third fixing post is located on the top wall of said internally convex cavity, the top of said branch pipe is externally sleeved and fixed on said third fixing post in step S2, and said third fixing post is pulled out from said hardened anchored tower-barrel section after said formwork is removed in step S4.
7. The method of claim 1, wherein the anchor tower tube section is a prefabricated member, the formwork comprises a bottom formwork, the bottom formwork forms a bottom wall of the casting cavity, the bottom formwork is provided with a fourth fixing column and a fifth fixing column which are arranged towards the casting cavity, the bottom of the vertical corrugated pipe is sleeved and fixed on the fourth fixing column in the step S2, the bottom of the Y-shaped corrugated pipe is sleeved and fixed on the fifth fixing column, and the fourth fixing column and the fifth fixing column are pulled out from the hardened anchor tower tube section after the formwork is removed in the step S4.
8. The construction method of an anchoring tower barrel section according to claim 1, wherein in step S2, the tied reinforcement bars are formed with a first shaped cage and a second shaped cage, the vertical corrugated pipe is located in the first shaped cage, and the Y-shaped corrugated pipe is located in the second shaped cage.
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| CN106567330A (en) * | 2016-09-13 | 2017-04-19 | 郑州大学 | Sectional anchoring structure for box girder internal prestressing tendon |
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