CN209798708U - Half-and-half prefabricated corridor structure - Google Patents
Half-and-half prefabricated corridor structure Download PDFInfo
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- CN209798708U CN209798708U CN201821930193.0U CN201821930193U CN209798708U CN 209798708 U CN209798708 U CN 209798708U CN 201821930193 U CN201821930193 U CN 201821930193U CN 209798708 U CN209798708 U CN 209798708U
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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
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Abstract
In order to overcome prior art not enough, the utility model provides a prefabricated corridor structure of half is assembled by mated symmetry cut apart the body and is constituteed, the symmetry cut apart the body and include the straight wall section and the top arch section of integrative hookup, two-layer reinforcing bar net piece is arranged to straight wall section and top arch section extension face, reinforcing bar net piece constitute by the vertical reinforcing bar and the horizontal steel wire that mutually perpendicular laid, set up four hoistholes on the symmetry cut apart the body. The utility model can effectively solve the difficulty of equipment hoisting and installation brought by the dam corridor full-prefabricating method, and achieve the expected effects of rapid construction and cost saving; it has advantages such as construction convenience, hoist and mount are swift, construction cycle is short, overall stability is good and the security is high, can lightweight, standardization and standardization construction, the utility model discloses can also not receive the restriction of prefabricated place and lifting device tonnage.
Description
Technical Field
The utility model belongs to hydraulic and hydroelectric engineering field especially relates to a prefabricated corridor structure of half that dam was used.
Background
In the field of hydraulic concrete gravity dam construction, a concrete dam is often designed with an internal gallery, and the gallery construction method has three forms, namely a full cast-in-place method, a full prefabrication method and a cast-in-place prefabrication combined method.
The method has the disadvantages that the whole cast-in-place method affects the process of dam through-warehouse pouring and continuous rising, the cast-in-place method is constructed in two times, the first time involves the on-site erection of a side wall template and the binding of side wall reinforcing steel bars, then the pouring of side wall peripheral concrete, the second time of erection of a top arch template and the binding of top arch reinforcing steel bars, and then the pouring of concrete; and the gallery runs through the dam shoulders of the left bank and the right bank to divide the dam face into an upper dam face and a lower dam face, and if the dam is a roller compacted concrete dam, construction mechanical equipment in a bin cannot pass through the dam, so that the construction period is long, and the continuity of dam construction is influenced.
The cast-in-place prefabrication combined method is generally used for cast-in-place of the roof arch prefabricated side wall, although the method reduces the procedures of erecting a roof arch template and binding reinforcing steel bars in a bin and shortens the intermittent time, the bin dividing times are not reduced, and the construction is carried out twice.
The full-prefabricated method is generally used for integrally prefabricating a side wall crown, the method shortens the warehouse stopping time of the dam face, reduces the procedures of existing vertical formworks and existing binding reinforcing steel bars, improves the construction efficiency, creates conditions for the rapid ascending and pouring of the dam, but brings difficulties for prefabrication, transfer, hoisting and installation if the corridor is large in structural size and heavy in size, needs to be hoisted by large-tonnage mechanical equipment, has more manpower and machinery, correspondingly increases the installation difficulty and risk, and also increases the construction cost.
disclosure of Invention
In order to overcome the above-mentioned not enough, the utility model provides a prefabricated corridor structure of half and half, prefabricated corridor structure of half is assembled by mated symmetry cut apart the body and is constituteed, the symmetry cut apart the body and include the straight wall section and the top arch section of integrative hookup, two-layer reinforcing bar net piece is arranged to straight wall section and top arch section extension face, reinforcing bar net piece constitute by the vertical reinforcement and the horizontal steel wire that mutually perpendicular laid, set up four hoistholes on the symmetry cut apart the body.
furthermore, the four hoisting holes are respectively arranged at the outer ends of the straight wall section or the top arch section in pairs.
Further, the symmetrical split bodies are prefabricated independently, the length of the prefabricated blocks of the symmetrical split bodies is 1m, the thickness of the prefabricated blocks of the symmetrical split bodies is 0.12m, the external construction height of the straight wall section is 2.0m, the external construction arch radius of the top arch section is 1.37m, the internal construction height of the straight wall section is 2.0m, and the internal construction radius of the top arch section is 1.25 m.
Furthermore, the diameter of the hoisting hole is 75mm, and the distance between the opening position of the hoisting hole and the edge end is 25-30 mm.
Further, the diameter of the longitudinal steel bar is 6mm, the diameter of the transverse steel wire is 3.5mm, and the arrangement intervals of the longitudinal steel bar or the transverse steel wire are 20 cm.
And the fillers of the straight wall section or the top arch section are all C25 concrete.
The utility model has the advantages that:
The difficulty in hoisting and installing equipment caused by a dam gallery full-prefabricating method can be effectively solved, and the expected effects of quick construction and cost saving are achieved; the construction method has the advantages of convenience in construction, quickness in hoisting, short construction period, good overall stability, high safety and the like, can be used for light weight, standardization and standardized construction, and can not be limited by a prefabricated site and the tonnage of hoisting equipment.
Description of the drawings:
Fig. 1 is a schematic structural view of a symmetrical partition of a semi-prefabricated gallery.
fig. 2 is a cross-sectional view of a symmetrical partition of the semi-preformed gallery.
Fig. 3 is a cross-sectional view of a symmetrical partition of the semi-preformed gallery.
In the figure, 1 straight wall section, 2 top arch sections, 3 lifting holes, 4 longitudinal steel bars and 5 transverse steel wires.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
As shown in fig. 1-3, the semi-prefabricated gallery structure is formed by assembling paired symmetrical partition bodies, each symmetrical partition body comprises a straight wall section 1 and a top arch section 2 which are integrally connected, two layers of reinforcing steel bar net sheets are arranged on the extension surfaces of the straight wall section 1 and the top arch section 2, each reinforcing steel bar net sheet is formed by longitudinal reinforcing steel bars 4 and transverse steel wires 5 which are vertically paved, and four hoisting holes 3 are formed in the symmetrical partition bodies.
The four hoisting holes 3 are respectively arranged at the outer ends of the straight wall section 1 or the top arch section 2 in pairs.
The symmetrical split bodies are prefabricated independently, the length of the prefabricated blocks of the symmetrical split bodies is 1m, the thickness of the prefabricated blocks of the symmetrical split bodies is 0.12m, the external construction height of the straight wall section 1 is 2.0m, the external construction arch radius of the top arch section 2 is 1.37m, the internal construction height of the straight wall section 1 is 2.0m, and the internal construction radius of the top arch section 2 is 1.25 m.
The diameter of the hoisting hole 3 is 75mm, and the distance between the opening position of the hoisting hole 3 and the edge end is 25-30 mm.
The diameter of the longitudinal steel bar 4 is 6mm, the diameter of the transverse steel wire 5 is 3.5mm, and the arrangement intervals of the longitudinal steel bar 4 or the transverse steel wire 5 are both 20 cm.
The fillers of the straight wall section 1 or the top arch section 2 are C25 concrete.
In the concrete implementation, the utility model discloses in the construction of Hunan Xinnu creek reservoir buried rock concrete dam engineering successfully being applied to.
The Xin-Nu-Lin-Shu-Ku is located in the Hongyu village of white sand town of Luxi county, Hunan province, and the dam site is about 13km away from the new city of white sand of Luxi county. The dam is a buried rock concrete gravity dam, the elevation of the dam crest is 201.00m, the width of the dam crest is 4.5m, the maximum dam height is 68.9m, a right bank retaining dam, an overflow dam and a left bank retaining dam are sequentially arranged from right to left, the total length of the dam crest is 254.0m, and the dam is totally divided into 13 dam sections. And a grouting and drainage gallery is arranged in the dam body, the total length is 236m, the length of the middle straight line section is 52m, the length of the left bank slope section is 84m, and the slope ratio is 1: 1.691; the length of a slope section of the right bank is 100m, and the slope ratio is 1: 2.1. the cross section of the gallery is of a city gate opening type, the width of the gallery is 2.5m, the height of a side wall is 1.75m, the radius of a crown is 1.25m, the width of a drainage ditch is 0.25m, the depth of the drainage ditch is 0.25m, and the outer edge of the gallery reaches 3m of the upstream side of the dam body.
The corridor construction method comprises the following steps:
And S1, manufacturing and installing the gallery precast block and the steel bars, wherein a steel bar blanking table is compiled according to a design drawing and a specification, a steel bar manufacturing and installing technology is completed, steel bar blanking and processing are organized according to the specification, and the thickness of a steel bar protective layer is 3 cm.
S2, processing and installing templates, wherein the prefabricated templates adopt shaped steel templates and are divided into inner templates and outer templates, the inner templates and the outer templates both adopt 4cmX4cmX3mm steel angles to weld transverse ribbed plates, the templates are divided into straight templates and 1/4 arc-segment templates, the straight templates adopt 5# channel steel and 1/4 arc-segment templates, cut 12mm thick steel plates are used as longitudinal ribbed plates, 1.5mm thick steel plates are used as panels, and the outer end parts are blocked by the 1.5mm thick steel plates. Before the templates are installed, the flatness of the templates is checked, the templates are coated with release agents, and the installation of the templates is completed through manual matching and 8t automobile hoisting.
S3, concrete preparation and vibration, the concrete is intensively mixed by a mixing station, C25W6F100 secondary concrete is adopted for continuous casting, each vibrating layer is 35cm thick, a Z50 type flexible shaft inserted vibrating rod is adopted for vibrating, a vibrator is vibrated in a fast-inserting and slow-pulling mode, insertion points are uniformly arranged and moved point by point, and after top concrete is vibrated, manual face repairing is carried out, so that the smooth appearance of the precast block and the shape size meeting the requirements are ensured.
and S4, demolding the concrete, and demolding after the strength of the concrete reaches 75% so that the surface and edges are not damaged by demolding in the demolding process and serve as the demolding standard.
And S5, curing the concrete, namely covering by using a plastic film, after the concrete is finally set, performing watering curing by a specially-assigned person, wherein the curing time of the concrete is not less than 28 days, curing in winter by using a comprehensive heat storage method, covering by using the plastic film, and then covering by using a cotton felt for heat preservation.
The present application is not limited to the above-described embodiments, and any obvious modifications or alterations to the above-described embodiments may be made by those skilled in the art without departing from the spirit of the present application and the scope of the appended claims.
Claims (6)
1. The semi-prefabricated gallery structure is characterized by being formed by assembling paired symmetrical partition bodies, wherein each symmetrical partition body comprises a straight wall section and a top arch section which are integrally connected, two layers of reinforcing steel bar net sheets are arranged on extension surfaces of the straight wall section and the top arch section, each reinforcing steel bar net sheet is composed of longitudinal reinforcing steel bars and transverse steel wires which are vertically paved, and four hoisting holes are formed in the symmetrical partition bodies.
2. The semi-prefabricated gallery structure of claim 1 wherein said four lifting holes are provided in pairs at the outer ends of the upright wall sections or the crown sections.
3. The semi-prefabricated corridor structure according to claim 1, wherein the symmetrical segments are prefabricated individually, the prefabricated blocks of the symmetrical segments are assembled to have a length of 1m and a thickness of 0.12m, the external construction height of the straight wall segment is 2.0m, the external construction arch radius of the top arch segment is 1.37m, the internal construction height of the straight wall segment is 2.0m, and the internal construction radius of the top arch segment is 1.25 m.
4. The semi-prefabricated gallery structure of claim 1, wherein the diameter of the lifting hole is 75mm, and the opening position of the lifting hole is 25-30 mm from the edge end.
5. A semi-prefabricated gallery structure according to claim 1, wherein the diameter of said longitudinal reinforcing bars is 6mm, the diameter of said transverse wires is 3.5mm, and the arrangement pitch of the longitudinal reinforcing bars or the transverse wires is 20 cm.
6. A semi-prefabricated gallery structure according to claim 1 wherein the filler of the upright or crown sections is C25 concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930193.0U CN209798708U (en) | 2018-11-22 | 2018-11-22 | Half-and-half prefabricated corridor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930193.0U CN209798708U (en) | 2018-11-22 | 2018-11-22 | Half-and-half prefabricated corridor structure |
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| Publication Number | Publication Date |
|---|---|
| CN209798708U true CN209798708U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821930193.0U Active CN209798708U (en) | 2018-11-22 | 2018-11-22 | Half-and-half prefabricated corridor structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356126A (en) * | 2018-11-22 | 2019-02-19 | 中水电第十工程局（郑州）有限公司 | Double of Precast Gallery structure and gallery construction method |
-
2018
- 2018-11-22 CN CN201821930193.0U patent/CN209798708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356126A (en) * | 2018-11-22 | 2019-02-19 | 中水电第十工程局（郑州）有限公司 | Double of Precast Gallery structure and gallery construction method |
| CN109356126B (en) * | 2018-11-22 | 2023-10-31 | 中电建十一局工程有限公司 | Semi-prefabricated gallery structure and gallery construction method |
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