AU2020374586A1 - Novel template-free anti-corrosion UHPC-NC combined bearing platform and construction method therefor - Google Patents
Novel template-free anti-corrosion UHPC-NC combined bearing platform and construction method therefor Download PDFInfo
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- AU2020374586A1 AU2020374586A1 AU2020374586A AU2020374586A AU2020374586A1 AU 2020374586 A1 AU2020374586 A1 AU 2020374586A1 AU 2020374586 A AU2020374586 A AU 2020374586A AU 2020374586 A AU2020374586 A AU 2020374586A AU 2020374586 A1 AU2020374586 A1 AU 2020374586A1
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- uhpc
- bearing platform
- top plate
- bottom plate
- hole
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
- E02D27/016—Flat foundations made mainly from prefabricated concrete elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
Disclosed are a novel template-free anti-corrosion ultra-high performance concrete (UHPC)-normal concrete (NC) bearing platform and a construction method therefor. The combined bearing platform comprises a prefabricated UHPC protective layer and a cast-in-place core normal concrete portion; the prefabricated UHPC protective layer specifically comprises: a UHPC bearing platform bottom plate, a bottom plate reserve groove, a bottom plate reserve round hole, a bottom plate reserve pile hole, prefabricated UHPC side plates I and II, a side plate reserve through hole, a prefabricated UHPC bearing platform top plate, a top plate reserve groove, a top plate reserve through round hole, a top plate reserve pile hole and full-thread screws, the prefabricated UHPC top plate, the side plates and the bottom plate being connected by using the full-thread screws; reinforcing bar glue is injected; coarse aggregate-free UHPC is cast in place at the top plate for hole sealing; and before covering the top plate, placing a bearing platform reinforcement cage in a space formed by the prefabricated UHPC protective layer, and casting normal concrete in place. The prefabricated UHPC protective layer of the present invention may not only prevent the corrosion of a bearing platform, but may also have the effect of a template; in addition, costs are reduced and the workload of on-site construction is reduced.
Description
[0001] The present disclosure relates to the field of building technologies, and in particular to a novel formwork-free corrosion-resistant ultrahigh performance concrete (UHPC)-normal concrete (NC) bearing platform applicable to saline-alkali regions and freeze-thaw regions and the like with strong corrosivity and humid geological conditions and a construction method thereof.
[0002] The power transmission and transformation project of Gansu State Grid is located in a region with highly corrosive saline soil in Hexi Corridor in which groundwater containing a large amount of sulfate ions and chloride ions may corrode reinforced concrete pile foundations. In addition, coupled with obvious freeze-thawing and dry-wet alternation, free water in the concrete is frozen into ice and then expand in volume so as to generate stress in the concrete. Due to the repeated actions, the internal stress exceeds a tensile strength of the concrete, resulting in concrete damage. Under the actions of corrosion and freeze-thawing, towers may be tilted or even toppled sometimes, thereby severely affecting the safety and normal operation of power transmission and transformation lines. At present, for corrosion prevention of the concrete foundations, a coating protection method, a cathodic protection measure, a high-performance and polymer concrete, and the like are usually used in the engineering, but the above measures have obvious defects and result in unsatisfactory effects.
[0003] The appearance of UHPC provides a new idea to solve the corrosion problem of the power transmission and transformation project foundation from the viewpoint of material. As a new generation of cement-based engineering material, the UHPC is prepared by adding a high-performance additive and an admixture without use of coarse aggregate based on Densified with Small Particles (DSP) theory, and thus is suitable for different special structures and harsh environments. The excellent material performance of UHPC is embodied in the followings: (1) the UHPC has high tensile/compressive strengths, which are about 5 times of the normal concrete material; (2) the UHPC has a denser microstructure than the normal concrete; (3) the UHPC has an excellent ductility and a small fracture width; (4) the UHPC and the normal concrete are both cement-based materials with good interface compatibility to ensure synergic working of two materials; (5) based on its excellent density, its resistance to chloride ion penetration of the UHPC is two orders of magnitude higher than I that of the normal concrete.
[0004] The UHPC has high costs, and is subjected to corrosion from its contact layer contacting with external environment rather than from an internal core zone. Thus, for a bearing platform of a power transmission tower foundation, if the synergic working of the UHPC (outsourcing) and the NC (the internal core) of the bearing platform is realized, it is expected to, on one hand, greatly improve the corrosion resistance of the power transmission tower foundation in the saline-alkali region and, on the other hand, greatly reduce initial costs and full-life maintenance costs, so that it can be widely promoted and applied. The prefabrication of the outsourced part can also improve the prefabrication rate, reduce the costs and shorten construction period.
[0005] To solve the problem in the prior art, the present disclosure provides a novel formwork-free corrosion-resistant UHPC-NC bearing platform and a construction method thereof to outsource a UHPC bearing platform to be prefabricated in a factory with an internal core concrete cast in situ. Therefore, the corrosion resistance of a power transmission and transformation tower bearing platform is improved with lower costs under the precondition of guaranteeing construction progress.
[0006] To achieve the above object, the present disclosure provides a novel formwork-free corrosion-resistant UHPC-NC combined bearing platform. The bearing platform includes a prefabricated UHPC protective layer and a core normal concrete. The prefabricated UHPC protective layer includes a prefabricated UHPC bearing platform bottom plate, a bottom plate reserved groove, a bottom plate reserved round hole, a bottom plate reserved pile hole, a prefabricated UHPC side plate I and a prefabricated UHPC side plate II, a side plate reserved penetration hole, a prefabricated UHPC bearing platform top plate, a top plate reserved groove, a top plate reserved penetration round hole, a top plate reserved column hole, a full-thread screw rod and a same-ratio hole-sealing UHPC. The prefabricated UHPC side plate I and the prefabricated UHPC side plate II are located between the prefabricated UHPC bearing platform bottom plate and the prefabricated UHPC bearing platform top plate. The bottom plate reserved groove and the top plate reserved groove correspond in position to the prefabricated UHPC side plate I and the prefabricated UHPC side plate II. The full-thread screw rod penetrates through the top plate reserved penetration round hole, the side plate reserved penetration hole and the bottom plate reserved round hole sequentially. The same-ratio hole-sealing UHPC is used to seal outside of the full-thread screw rod in the top plate reserved penetration round hole.
[0007] A construction method of a novel formwork-free corrosion-resistant UHPC-NC combined bearing platform includes the following steps.
[0008] At step 1, an anchor adhesive is injected into the bottom plate reserved round hole, and bonding mortar is laid in the bottom plate reserved groove.
[0009] At step 2, the side plate I and the side plateII are placed in the bottom plate reserved groove.
[0010] At step 3, the anchor adhesive is poured into the side plate reserved penetration hole, and the full-thread screw rod is inserted into the hole to the bottom plate reserved round hole.
[0011] Preferably, the bottom plate, the side plate I and the side plate II form an outer protective layer of the bearing platform, and are used as a permanent formwork to pour concrete.
[0012] Preferably, a column is positioned and put in abound bearing platform reinforcement cage, column reinforcements are bound to pour the core normal concrete.
[0013] Preferably, before the poured normal concrete is finally solidified, the prefabricated UHPC bearing platform top plate is hoisted to ensure that the full-thread screw rod is penetrated into the top plate reserved penetration round hole, and the side plate I and the side plate II are placed in the top plate groove.
[0014] Preferably, the same-ratio hole-sealing UHPC is poured into the top plate reserved penetration round hole.
[0015] After the construction is completed, the formwork-free corrosion-resistant UHPC-NC combined bearing platform is obtained.
[0016] The present disclosure has the following beneficial effects. The novel formwork-free corrosion-resistant UHPC-NC combined bearing platform and the construction method thereof based on the above design concept of the present disclosure are simple in structure. In the construction process, the outer protective layer of the UHPC bearing platform may be prefabricated in a factory and then mounted on site to pour the core normal concrete, so that the construction of the bearing platform may be partially factory-manufactured so as to shorten the construction period. The outer protective layer of the UHPC bearing platform can greatly improve the corrosion resistance of the bearing platform, and can also be used as the permanent formwork at the same time to lower construction costs and reduce on-site constructions.
[0017] FIG. 1 is a schematic diagram of a prefabricated UHPC bearing platform bottom plate.
[0018] FIG. 2 is atop view of a prefabricated UHPC side plate.
[0019] FIG. 3 is a schematic diagram of a prefabricated UHPC side plate.
[0020] FIG. 4 is a schematic diagram of a prefabricated UHPC bearing platform top plate.
[0021] FIG. 5 is a structural schematic diagram of a novel formwork-free corrosion-resistant UHPC-NC combined bearing platform of the present disclosure.
[0022] Numerals of FIGS. 1-5 are described respectively as follows: prefabricated UHPC bearing platform bottom plate 1; bottom plate reserved groove 2; bottom plate reserved round hole 3; bottom plate reserved pile hole 4; prefabricated UHPC side plate I 5; prefabricated UHPC side plate II 6; side plate reserved penetration hole 7; prefabricated UHPC bearing platform top plate 8; top plate reserved groove 9; top plate reserved penetration round hole 10; top plate reserved column hole 11; full-thread screw rod 12; same-ratio hole-sealing UHPC13; and core normal concrete 14.
[0023] To make the objects, technical solutions and advantages of the present disclosure clearer, examples of the present disclosure will be further described in detail below in combination with accompanying drawings. The following examples are only used to explain the technical solutions of the present disclosure rather than limit the protection scope of the present disclosure.
[0024] The present disclosure provides a novel formwork-free corrosion-resistant ultra-high performance concrete (UHPC)-normal concrete (NC) bearing platform. The bearing platform includes a prefabricated UHPC protective layer and a core normal concrete, where the prefabricated UHPC protective layer includes a prefabricated UHPC bearing platform bottom plate 1, a bottom plate reserved groove 2, a bottom plate reserved round hole 3, a bottom plate reserved pile hole 4 (as shown in FIG. 1); a prefabricated UHPC side plate 5 and a prefabricated UHPC side plate II6, a side plate reserved penetration hole 7 (as shown in FIG. 2); a prefabricated UHPC bearing platform top plate 8, a top plate reserved groove 9, a top plate reserved penetration round hole 10, a top plate reserved column hole 11 (as shown in FIG. 4); a full-thread screw rod 12 and a same-ratio hole-sealing UHPC 13 (as shown in FIG. 5). The bottom plate reserved groove 2, the bottom plate reserved round hole 3 and the bottom plate reserved pile hole 4 are disposed on the prefabricated UHPC bearing platform bottom plate 1, and the bottom plate reserved round hole 3 is located in the bottom plate reserved groove 2; the vertical side plate reserved penetration hole 7 is disposed on the prefabricated UHPC side plate I 5 and the prefabricated UHPC side plate II 6 respectively; the top plate reserved groove 9 is disposed on the prefabricated UHPC bearing platform top plate 8, and the top plate reserved penetration round hole 10 is disposed in the top plate reserved groove 9; the bottom plate reserved groove 2 and the top plate reserved groove 9 correspond in position to the prefabricated UHPC side plate I5 and the prefabricated UHPC side plate II6.
[0025] A construction method of the above prefabricated UHPC protective layer includes the following steps.
[0026] At step 1, an anchor adhesive is injected into the bottom plate reserved round hole 3, and bonding mortar is laid in the bottom plate reserved groove 2.
[0027] At step 2, the side plate I 5 and the side plate II 6 are placed in the bottom plate reserved groove 2.
[0028] At step 3, the anchor adhesive is poured into the side plate reserved penetration hole 7, and the full-thread screw rod is inserted into the hole to the bottom plate reserved round hole 3.
[0029] At the above construction step, the bottom plate 1, the side plate I5 and the side plate II 6 form an outer protection layer of the bearing platform, and are used as a permanent formwork to pour concrete.
[0030] At the above construction step, a bearing platform pouring space is formed as follows: a column is positioned and put in a bound bearing platform reinforcement cage and column reinforcements are bound and then the core normal concrete 14 is poured.
[0031] At the above step, before the poured normal concrete is finally solidified, the prefabricated UHPC bearing platform top plate 8 is hoisted to ensure that the full-thread screw rod 12 is penetrated into the top plate reserved penetration round hole 10, and the side plate I5 and the side plate II6 are placed in the top plate groove.
[0032] At the above step, the same-ratio hole-sealing UHPC 13 is poured into the top plate reserved penetration round hole 10 to seal the hole.
[0033] After the construction is completed, the formwork-free corrosion-resistant UHPC-NC combined bearing platform is obtained.
[0034] The present disclosure provides a novel formwork-free corrosion-resistant ultra-high performance concrete (UHPC)-normal concrete (NC) bearing platform applicable to saline-alkali regions and freeze-thaw regions and the like with strong corrosivity and humid geological conditions and a construction method thereof. The combined bearing platform includes a prefabricated UHPC protective layer and a cast-in-situ core normal concrete. Specifically, the prefabricated UHPC protective layer includes a prefabricated UHPC bearing platform bottom plate, a bottom plate reserved groove, a bottom plate reserved round hole, a bottom plate reserved pile hole, a prefabricated UHPC side plate I and a prefabricated UHPC side plate II, a side plate reserved penetration hole, a prefabricated UHPC bearing platform top plate, a top plate reserved groove, a top plate reserved penetration round hole, a top plate reserved column hole and a full-thread screw rod. The prefabricated UHPC top plate, the prefabricated UHPC side plate and the prefabricated UHPC bottom plate described above are connected by the full-thread screw rod, the anchor adhesive is injected, and the UHPC without coarse aggregate is poured at the top plate to seal the hole. Before the top plate is covered, the bearing platform reinforcement cage is placed into the space formed by the prefabricated UHPC protective layer to pour the normal concrete. The prefabricated UHPC protective layer in the present disclosure can prevent the corrosion of the bearing platform and serve as formwork, thereby lowering costs and reducing on-site workloads.
[0035] Finally, it is to be noted that the foregoing descriptions are merely preferred examples of the present disclosure, and are not intended to limit the present disclosure. Although the present disclosure is described in detail by referring to the above examples, persons skilled in the art may still modify the technical solution of each example described above or make equivalent substitutions for a part of technical features in the above examples. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.
Claims (6)
1. A novel formwork-free corrosion-resistant ultra-high performance concrete (UHPC)-normal concrete (NC) combined bearing platform, comprising: a prefabricated UHPC protective layer and a core normal concrete, wherein the prefabricated UHPC protective layer comprises a prefabricated UHPC bearing platform bottom plate (1), a bottom plate reserved groove (2), a bottom plate reserved round hole (3), a bottom plate reserved pile hole (4), a prefabricated UHPC side plate I (5) and a prefabricated UHPC side plate 11 (6), a side plate reserved penetration hole (7), a prefabricated UHPC bearing platform top plate (8), a top plate reserved groove (9), a top plate reserved penetration round hole (10), a top plate reserved column hole (11), a full-thread screw rod (12) and a same-ratio hole-sealing UHPC(13); the prefabricated UHPC side plate 1 (5) and the prefabricated UHPC side plate II (6) are located between the prefabricated UHPC bearing platform bottom plate (1) and the prefabricated UHPC bearing platform top plate (8); the bottom plate reserved groove (2) and the top plate reserved groove (9) correspond in position to the prefabricated UHPC side plate I (5) and the prefabricated UHPC side plate 11 (6); the full-thread screw rod (12) penetrates through the top plate reserved penetration round hole (10), the side plate reserved penetration hole (7) and the bottom plate reserved round hole (3) sequentially; the same-ratio hole-sealing UHPC (13) is used to seal outside of the full-thread screw rod (12) inside the top plate reserved penetration round hole (10) .
2. A construction method of the novel formwork-free corrosion-resistant UHPC-NC combined bearing platform according to claim 1, comprising the following steps:
at step 1, injecting an anchor adhesive into the bottom plate reserved round hole (3), and laying bonding mortar in the bottom plate reserved groove (2);
at step 2, placing the side plate I (5) and the side plate11 (6) in the bottom plate reserved groove (2); and
at step 3, pouring the anchor adhesive into the side plate reserved penetration hole (7), and inserting the full-thread screw rod into the hole to the bottom plate reserved round hole
(3).
3. The construction method according to claim 2, wherein the bottom plate (1), the side plate I (5) and the side plate 11 (6) form an outer protective layer of the bearing platform, and are used as a permanent formwork to pour concrete.
4. The construction method according to claim 2, wherein a column is positioned and put in a bound bearing platform reinforcement cage and column reinforcements are bound to pour the core normal concrete (14).
5. The construction method according to claim 4, wherein before the poured normal concrete is finally solidified, the prefabricated UHPC bearing platform top plate (8) is hoisted to ensure that the full-thread screw rod (12) is penetrated into the top plate reserved penetration round hole (10), and the side plate 1 (5) and the side plate 11 (6) are placed in the top plate groove.
6. The construction method according to claim 5, wherein the same-ratio hole-sealing UHPC(13) is poured into the top plate reserved penetration round hole (10) so that the formwork-free corrosion-resistant UHPC-NC combined bearing platform is obtained after the construction is completed.
[0
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911034714.3A CN110924421A (en) | 2019-10-29 | 2019-10-29 | Novel template-free corrosion-resistant UHPC-NC combined bearing platform and construction method thereof |
| CN201911034714.3 | 2019-10-29 | ||
| PCT/CN2020/115196 WO2021082768A1 (en) | 2019-10-29 | 2020-09-15 | Novel template-free anti-corrosion uhpc-nc combined bearing platform and construction method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020374586A1 true AU2020374586A1 (en) | 2021-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020374586A Abandoned AU2020374586A1 (en) | 2019-10-29 | 2020-09-15 | Novel template-free anti-corrosion UHPC-NC combined bearing platform and construction method therefor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110924421A (en) |
| AU (1) | AU2020374586A1 (en) |
| WO (1) | WO2021082768A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565121A (en) * | 2021-07-22 | 2021-10-29 | 国网甘肃省电力公司经济技术研究院 | Basic structure of non-dismantling UHPC thin shell in harsh environment and construction method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110924421A (en) * | 2019-10-29 | 2020-03-27 | 国家电网有限公司 | Novel template-free corrosion-resistant UHPC-NC combined bearing platform and construction method thereof |
| CN112252586B (en) * | 2020-10-29 | 2021-09-21 | 山东大学 | Prefabricated simply-supported beam with replaceable protective layer and manufacturing method thereof |
| CN113565120B (en) * | 2021-07-22 | 2022-10-14 | 国网甘肃省电力公司经济技术研究院 | Composite iron tower bearing platform suitable for frost heaving area and construction method |
| CN113668540A (en) * | 2021-08-17 | 2021-11-19 | 中国二十二冶集团有限公司 | Concrete bearing platform foundation construction method |
| CN116290059B (en) * | 2023-01-04 | 2023-09-08 | 江苏海洋大学 | Prefabricated ultra-high performance concrete spiral pile cap and construction process |
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| DE10215579A1 (en) * | 2002-04-10 | 2003-10-23 | Franz Vogl | Lost mold, for casting concrete foundations, has a base plate with end plates projecting at right angles of cement-bonded materials, locked together by fasteners |
| KR20090003728U (en) * | 2007-10-17 | 2009-04-22 | 주식회사 금오조경개발 | The pillar support structure of bower |
| US20160032554A1 (en) * | 2013-01-03 | 2016-02-04 | Tony Hicks | Insulating Device for Building Foundation Slab |
| CN103912006B (en) * | 2014-03-14 | 2017-01-04 | 中国电建集团西北勘测设计研究院有限公司 | A kind of many pile foundation structures of assembled and undertake the construction of method |
| CN203755778U (en) * | 2014-03-27 | 2014-08-06 | 哈尔滨工业大学（威海） | Assembly external pre-stress reactive powder concrete wind power tower |
| CN103867019B (en) * | 2014-03-27 | 2016-04-20 | 哈尔滨工业大学（威海） | Assembling external prestressing RPC wind power tower |
| CN206385562U (en) * | 2016-12-30 | 2017-08-08 | 浙江瑞能通信科技股份有限公司 | A kind of Novel Communication bar basis |
| CN106758790B (en) * | 2017-02-06 | 2018-07-13 | 上海应用技术大学 | A kind of precast construction and construction method of bridge substructure construction |
| CN206635802U (en) * | 2017-04-07 | 2017-11-14 | 江苏国华管塔制造有限公司 | A kind of assembled fast-assembling basis |
| CN107893426A (en) * | 2017-11-15 | 2018-04-10 | 中国电力工程顾问集团西北电力设计院有限公司 | The heavy excavation anti-corrosion foundation and construction method of a kind of electric power line pole tower |
| CN207553103U (en) * | 2017-11-16 | 2018-06-29 | 福建省新能海上风电研发中心有限公司 | A kind of UHPC construction formworks |
| CN108755380A (en) * | 2018-06-07 | 2018-11-06 | 广州市市政工程设计研究总院有限公司 | A kind of UHPC small box girders structure |
| CN208830136U (en) * | 2018-07-25 | 2019-05-07 | 重庆大学 | A kind of UHPC pipe-concrete prefabricated assembling combination bridge pier of spigot-and-socket joint |
| CN109281249B (en) * | 2018-11-16 | 2023-12-12 | 福州大学 | UHPC-NC superposed trestle bridge deck structure and construction method thereof |
| CN109440804A (en) * | 2018-12-28 | 2019-03-08 | 上海建工七建集团有限公司 | A kind of cushion cap template system and construction method |
| CN110924421A (en) * | 2019-10-29 | 2020-03-27 | 国家电网有限公司 | Novel template-free corrosion-resistant UHPC-NC combined bearing platform and construction method thereof |
-
2019
- 2019-10-29 CN CN201911034714.3A patent/CN110924421A/en active Pending
-
2020
- 2020-09-15 AU AU2020374586A patent/AU2020374586A1/en not_active Abandoned
- 2020-09-15 WO PCT/CN2020/115196 patent/WO2021082768A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565121A (en) * | 2021-07-22 | 2021-10-29 | 国网甘肃省电力公司经济技术研究院 | Basic structure of non-dismantling UHPC thin shell in harsh environment and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021082768A1 (en) | 2021-05-06 |
| CN110924421A (en) | 2020-03-27 |
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