CN203890980U - Backfilling and grouting structure for buried pressure pipe - Google Patents
Backfilling and grouting structure for buried pressure pipe Download PDFInfo
- Publication number
- CN203890980U CN203890980U CN201420256302.0U CN201420256302U CN203890980U CN 203890980 U CN203890980 U CN 203890980U CN 201420256302 U CN201420256302 U CN 201420256302U CN 203890980 U CN203890980 U CN 203890980U
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- Prior art keywords
- grouting
- penstock
- embedded
- longitudinal
- pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a backfilling and grouting structure for a buried pressure pipe. The backfilling and grouting structure comprises the pressure pipe and a drain channel arranged outside the pressure pipe. A plurality of longitudinal grouting pipes and transverse grouting pipes are embedded outside the pressure pipe through backfilled concrete. Sprayed concrete is arranged on the outer surface of the backfilled concrete. The drain channel is provided with rock holes. Grouting pipes are embedded in the rock holes and are communicated with both the longitudinal grouting pipes and the transverse grouting pipes. The top of each longitudinal grouting pipe is provided with a plurality of longitudinal grout openings; the top of each transverse grouting pipe is provided with a plurality of transverse grout openings. The drain channel is provided, the grouting pipes embedded in the rock holes are communicated with those embedded outside the pressure pipe, the pressure pipe and surrounding rock are jointly stressed, completeness of the pressure pipe is kept, the pressure pipe, the concrete and the surrounding rock can be stressed as a whole, the problem that a void occurs between the backfilled concrete and the surrounding rock is solved, and operation safety of the pressure pipe is enhanced.
Description
Technical field
The utility model relates to a kind of embedded penstock backfill grouting structure, belongs to water conservancy and hydropower technical field.
Background technology
Hydropower station pressure pipeline refers to pipeline from surge-chamber to the power plant building hydraulic turbine that carry the water yield from reservoir, forebay or, and wherein embedded penstock refers to and imbeds the concrete steel pipe of filling in rock mass and between steel pipe and country rock.According to construction of hydropower plant development, most of engineerings because Penstock Structures is arranged, excavation face is uneven, concrete shrinkage or the factor such as construction technology is improper, cause the gradient to be delayed and between the penstock fill concrete lining ring crown of 45 ° and country rock, have large " coming to nothing ", while affecting the safety of steel pipe operation, tackle the position of coming to nothing and carry out backfill grouting.At present, backfill grouting processing mode mainly contains at steel pipe crown preformed hole or along two kinds of crag pre-embedment grouting pipes, the potential safety hazard that preformed hole mode the number of openings is many, blindness is large, aperture is greater than 50mm conventionally, weld reinforcement technological requirement is high and solder skip exists interior water to exosmose, built-in pipe mode was easily blocked and affects later stage grouting effect in construction period, and long construction period, complex process, blindness are large, construction investment, security reliability is poor.Therefore how to provide a kind of short construction period, safe and reliable embedded penstock backfill grouting structure, is current hydropower station pressure pipeline technical field of construction problem demanding prompt solution.
Utility model content
For addressing the above problem, the utility model provides a kind of embedded penstock backfill grouting structure, thereby reaches the object of effective raising backfill grouting construction effect.
The utility model is achieved by following technical solution.
A kind of embedded penstock backfill grouting structure, comprise penstock and the drainage tunnel that is arranged at penstock outside, described penstock outside is embedded with some longitudinal grout pipes and horizontal grout pipe by fill concrete, at fill concrete external surface, be provided with pneumatically placed concrete, on described drainage tunnel, be provided with petrosal foramen, in petrosal foramen, be embedded with grout pipe, described grout pipe is communicated with longitudinal grout pipe and horizontal grout pipe respectively.
The diameter of described petrosal foramen is 75mm.
Described longitudinal grout pipe top is provided with some longitudinal grouting mouthful.
Described horizontal grout pipe top is provided with some horizontal grouting mouthful.
The diameter of described longitudinal grouting mouth is 30mm, pitch-row 1000mm.
The diameter of described longitudinal grouting mouth is 30mm, pitch-row 300mm.
Described grout pipe adopts φ 50mm polyethylene hard tube, and is fixed on pneumatically placed concrete by the cement nail with pad.
Described grout pipe arranged outside has stop grouting plug.
The beneficial effects of the utility model are:
Compared with prior art, the utility model is arranged in conjunction with drainage tunnel, by pre-embedment grouting pipe in petrosal foramen and the outside pre-embedment grouting pipe of penstock, be interconnected, and adopt to push away and catch up with grouting technique to be in the milk, make penstock and country rock coaction, guarantee the abundant transmission of internal water pressure, the integrality that has not only kept steel pipe, guaranteed that steel pipe, concrete and country rock integral body are stressed, and solved the problem of coming to nothing between fill concrete and country rock, increased the safety of steel pipe operation; The utility model is simple for structure, effectively improves backfill grouting construction effect, and reduction of erection time and cost saving, have good economic benefit and social benefit greatly.
Accompanying drawing explanation
Fig. 1 is embedded penstock grouting vertical section structure schematic diagram of the present utility model;
Fig. 2 is the A place structure enlarged diagram of Fig. 1;
Fig. 3 is the B-B sectional drawing of Fig. 1;
Fig. 4 is the C place structure enlarged diagram of Fig. 3.
In figure: 1-penstock, 2-drainage tunnel, 3-petrosal foramen, the longitudinal grout pipe of 4-, the horizontal grout pipe of 5-, 6-fill concrete, 7-pneumatically placed concrete, 8-stop grouting plug, 9-grout compartment line of demarcation, 31-grout pipe, the 41-mouth that is longitudinally in the milk, the 51-mouth that is laterally in the milk.
The specific embodiment
Below in conjunction with accompanying drawing, further describe the technical solution of the utility model, but described in claimed scope is not limited to.
As shown in Figures 1 to 4, a kind of embedded penstock backfill grouting structure described in the utility model, comprise penstock 1 and the drainage tunnel 2 that is arranged at penstock 1 outside, described penstock 1 outside is embedded with some longitudinal grout pipes 4 and horizontal grout pipe 5 by fill concrete 6, at fill concrete 6 external surfaces, be provided with pneumatically placed concrete 7, on described drainage tunnel 2, be provided with petrosal foramen 3, in petrosal foramen 3, be embedded with grout pipe 31, described grout pipe 31 is communicated with longitudinal grout pipe 4 and horizontal grout pipe 5 respectively.
The diameter of described petrosal foramen 3 is 75mm.
Described longitudinal grout pipe 4 tops are provided with some longitudinal grouting mouths 41.
Described horizontal grout pipe 5 tops are provided with some horizontal grouting mouths 51.
The diameter of described longitudinal grouting mouth 41 is 30mm, pitch-row 1000mm.
The diameter of described longitudinal grouting mouth 51 is 30mm, pitch-row 300mm.
Described grout pipe 31 adopts φ 50mm polyethylene hard tube, and is fixed on pneumatically placed concrete 7 or on country rock wall by the cement nail with pad.
Described grout pipe 31 arranged outside have stop grouting plug 8.Can overcome so the excessive risk of grouting slurries.
Adopt technique scheme when construction, by φ 75mm petrosal foramen 3 and pre-embedment grouting pipe, form and connect loop; Grouting construction can adopt to push away catches up with grouting, i.e. construction, from lower one end, advances by ring to higher one end.Backfill grouting is to form calculus by grout injection (or cement mortar), in order to coming to nothing between filling fill concrete 6 lining ring crowns and country rock, meet steel pipe and country rock coaction, guarantee the abundant transmission of internal water pressure, this point is very important for the embedded penstock of considering surrounding rock to share internal water pressure.Adopt this technical scheme not only to keep the integrality of steel pipe, guaranteed the whole stressed feature of steel pipe, concrete and country rock, and solved the problem of coming to nothing between fill concrete 6 and country rock, increase the safety of steel pipe operation.
Embodiment of the present utility model: when penstock 1 because structural configuration, excavation face are uneven, concrete shrinkage or the factor such as construction technology is improper, cause the gradient to be delayed between the penstock fill concrete lining ring crown of 45 ° and country rock and occur " harmful coming to nothing " phenomenon, while affecting the safety of steel pipe operation, should to the position of coming to nothing, carry out backfill grouting by structure described in the utility model, its concrete backfill grouting implementation step is as follows:
(1) boring: according to bore φ 75mm petrosal foramen 3 shown in Fig. 1 to Fig. 4 from the drainage tunnel 2 at penstock 1 top, and guaranteed not get into penstock 1 before concrete backfill; And in petrosal foramen 3 pre-buried φ 50mm polyethylene hard tube grout pipe 31;
(2) pipe laying: before concrete backfill at the pre-buried longitudinal grout pipes 4 of 120 ° of outside crowns of penstock 1 and horizontal grout pipe 5, grout pipe adopts φ 50mm polyethylene hard tube, and adopts the cement nail with pad that grout pipe is fixed on pneumatically placed concrete 7 or on country rock wall.Longitudinal grouting mouth 41 of φ 30mm is set, pitch-row 1000mm at longitudinal grout pipe 4 tops; The horizontal grouting mouthful of φ 30mm is set, pitch-row 300mm at horizontal grout pipe 5 tops.After built-in pipe connects, should carry out stressed inspection and fill, return-air inspection, the pipeline of guaranteeing to be in the milk connects; When fill concrete, tackle backfill grouting pipe and protected, in order to avoid stop up aperture.
(3) grouting: backfill grouting must reach at the lining concrete of respective regions after 70% design strength, can carry out.Crown backfill grouting should be carried out according to grout compartment line of demarcation 9 subregions as shown in Figure 1, each standard paragraphs pipe range 12m that is longitudinally in the milk, and non-standard segment length determines by a construction section; As shown in Figure 2, the end of grout compartment line of demarcation 9 place's sections is closely knit with mortar or concrete shutoff, to form isolated area; Grouting process adopts " push away and catch up with grouting ", i.e. construction, from lower one end, advances by ring to higher one end, and a in Fig. 1, Fig. 2 represents that, into slurry direction, b represents pulp direction; Priming petock gray scale is 0.6 (or 0.5): 1 cement paste, between lining ring crown and country rock, exist the position in larger space to answer the cement mortar that priming petock gray scale is lower, grouting pressure 0.2～0.3Mpa, can adjust according to grouting actual conditions, and pressure should ascendingly increase step by step; In filling process, should splash the distortion of steel pipe, prevent steel pipe tube wall unstability;
(4) grouting ending standard and method for sealing: under the pressure of design code, when inlet pipe grout absorption is equal with slurry-outlet quantity, continuity perfusion 10min, can finish; After grout hole grouting and inspection eye inspection finish, answer evacuation aperture internal water accumulation and dirt, adopt " full hole grouting method of pore sealing " closely knit with the dry cement mortar packing of holing, aperture pressure is smeared and is flushed;
(5) quality examination: the boring of inspection eye is carried out from the drainage tunnel at penstock top, and prevent from getting into penstock.
Claims (8)
1. an embedded penstock backfill grouting structure, comprise penstock (1) and be arranged at the outside drainage tunnel (2) of penstock (1), it is characterized in that: described penstock (1) outside is embedded with some longitudinal grout pipes (4) and horizontal grout pipe (5) by fill concrete (6), at fill concrete (6) external surface, be provided with pneumatically placed concrete (7), on described drainage tunnel (2), be provided with petrosal foramen (3), in petrosal foramen (3), be embedded with grout pipe (31), described grout pipe (31) is communicated with longitudinal grout pipe (4) and horizontal grout pipe (5) respectively.
2. a kind of embedded penstock backfill grouting structure according to claim 1, is characterized in that: the diameter of described petrosal foramen (3) is 75mm.
3. a kind of embedded penstock backfill grouting structure according to claim 1, is characterized in that: described longitudinal grout pipe (4) top is provided with some longitudinal grouting mouthful (41).
4. a kind of embedded penstock backfill grouting structure according to claim 1, is characterized in that: described horizontal grout pipe (5) top is provided with some horizontal grouting mouthful (51).
5. a kind of embedded penstock backfill grouting structure according to claim 3, is characterized in that: the diameter of described longitudinal grouting mouthful (41) is 30mm, pitch-row 1000mm.
6. a kind of embedded penstock backfill grouting structure according to claim 4, is characterized in that: the diameter of described longitudinal grouting mouthful (51) is 30mm, pitch-row 300mm.
7. a kind of embedded penstock backfill grouting structure according to claim 1, is characterized in that: described grout pipe (31) adopts φ 50mm polyethylene hard tube, and is fixed on pneumatically placed concrete (7) by the cement nail with pad.
8. a kind of embedded penstock backfill grouting structure according to claim 1, is characterized in that: described grout pipe (31) arranged outside has stop grouting plug (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420256302.0U CN203890980U (en) | 2014-05-19 | 2014-05-19 | Backfilling and grouting structure for buried pressure pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420256302.0U CN203890980U (en) | 2014-05-19 | 2014-05-19 | Backfilling and grouting structure for buried pressure pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203890980U true CN203890980U (en) | 2014-10-22 |
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ID=51717402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420256302.0U Withdrawn - After Issue CN203890980U (en) | 2014-05-19 | 2014-05-19 | Backfilling and grouting structure for buried pressure pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203890980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018475A (en) * | 2014-05-19 | 2014-09-03 | 中国水电顾问集团贵阳勘测设计研究院有限公司 | Embedded type penstock backfill grouting structure and grouting technology |
-
2014
- 2014-05-19 CN CN201420256302.0U patent/CN203890980U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018475A (en) * | 2014-05-19 | 2014-09-03 | 中国水电顾问集团贵阳勘测设计研究院有限公司 | Embedded type penstock backfill grouting structure and grouting technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20151216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |