CN203890978U - Contact grouting structure for buried pressure pipe - Google Patents
Contact grouting structure for buried pressure pipe Download PDFInfo
- Publication number
- CN203890978U CN203890978U CN201420255917.1U CN201420255917U CN203890978U CN 203890978 U CN203890978 U CN 203890978U CN 201420255917 U CN201420255917 U CN 201420255917U CN 203890978 U CN203890978 U CN 203890978U
- Authority
- CN
- China
- Prior art keywords
- pressure pipe
- penstock
- grout
- grouting
- contact grouting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
A contact grouting structure for a buried pressure pipe comprises the pressure pipe and micro-expansive concrete arranged outside the pressure pipe. The pressure pipe is provided with a plurality of grout holes. A grout outgoing pipe is welded at each grout hole. A tapered sealing plug is disposed in each grout hole. The top end of the tapered sealing plug is sealed by peripheral complete penetration. The pressure pipe is provided with the grout holes sealed with the tapered sealing plugs, backfilling of the micro-expansive concrete can be performed before invert void range and depth is detected by an acoustic geophysical prospecting method, and effective contact grouting is finally performed by additionally making a proper amount of simple and easy temporary grout pore structures, the void between the pressure pipe and the micro-expansive concrete is filled, the pressure pipe can be stressed circumferentially and evenly, the pressure pipe and rock mass are jointly stressed, full transmission of interior water pressure is guaranteed, the problem that the 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 contact 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 are because of the factor such as Penstock Structures layout, concrete shrinkage or construction technology be improper, cause the gradient to be delayed in occurring " coming to nothing " phenomenon at the bottom of the penstock of 45 ° between arch and fill concrete, the cavity that the appearance that even has is several centimetres to tens centimetres, the gap that the severe patient ultrastructure that comes to nothing continuously design allows, causes that local stress is excessive, while affecting the safety of steel pipe operation, therefore, tackle the position of seriously coming to nothing and carry out contact grouting.At present, contact grouting processing mode mainly contains at the bottom of steel pipe arch preformed hole or along two kinds of outer wall of steel pipe pre-embedment grouting pipes, preformed hole mode the number of openings is many, aperture is greater than 50mm conventionally, weld reinforcement technological requirement is high, there is the potential safety hazard that interior water exosmoses in solder skip simultaneously, and built-in pipe mode was easily blocked and affects later stage grouting effect in construction period; And these two kinds of contact grouting modes all belong to default measure, not necessarily corresponding with the region of coming to nothing, the later stage still needs by checking that complement grout hole carries out secondary contact grouting.The deficiency such as therefore, above-mentioned contact grouting mode exists long construction period, complex process, blindness is large, construction investment is more and security reliability is poor; Can not reach the construction effect of expection.
Utility model content
For addressing the above problem, the utility model provides a kind of embedded penstock contact 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 contact grouting structure, comprise penstock and be arranged at the slightly expanded concrete in penstock outside, on described penstock, offer some grout holes, at grout hole place, be welded with grouting fairlead, in the grout hole of offering, be provided with taper shutoff plug, on taper shutoff plug top, by periphery through welding, carry out shutoff.
Described grouting fairlead adopts seamless steel pipe to make, and wherein the diameter of seamless steel pipe is 14mm, and length is 10～20cm.
The diameter of described grout hole is 14mm, and hole depth is through penstock wall thickness, and leads to slightly expanded concrete degree of depth 20mm place.
The height of described periphery through welding is more than or equal to 5mm.
The wall thickness that the height of described taper shutoff plug is more than or equal to penstock adds 15mm.
The beneficial effects of the utility model are:
Compared with prior art, the utility model is offered grout hole on penstock by the later stage, and adopt taper shutoff to fill in row shutoff, backfill slightly expanded concrete can carried out in advance, adopting the method detection end of physical prospecting sonic detection to encircle come to nothing scope and the degree of depth afterwards, finally by the appropriate simple interim grouting small structure of complement, carry out contact grouting effectively, in order to coming to nothing between filling steel pipe and concrete, meet steel pipe hoop uniform stressed and with rock mass coaction, guarantee the abundant transmission of internal water pressure, the integrality that has not only kept steel pipe, guaranteed penstock, concrete and rock mass integral body are stressed, solved the problem of coming to nothing between fill concrete and country rock, increase the safety of steel pipe operation, the utility model is simple, with strong points, safe and reliable, can effectively improve contact grouting design and improve contact 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 cross-sectional view of the present utility model;
Fig. 2 is tube wall open-celled structure enlarged diagram of the present utility model;
Fig. 3 is hole wall plugging structure enlarged diagram of the present utility model;
Fig. 4 is taper shutoff plug structure enlarged diagram of the present utility model.
In figure: 1-penstock, 2-slightly expanded concrete, 3-rock mass, the 4-fairlead that is in the milk, 5-taper shutoff plug, 6-periphery through welding, 7-grout hole.
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 contact grouting structure described in the utility model, comprise penstock 1 and be arranged at the slightly expanded concrete 2 in penstock 1 outside, on described penstock 1, offer some grout holes 7, at grout hole 7 places, be welded with grouting fairlead 4, in the grout hole 7 of offering, be provided with taper shutoff plug 5, on taper shutoff plug 5 tops, by periphery through welding 6, carry out shutoff, the grout hole 7 on described penstock 1 was offered in the later stage.Adopt this grouting structure, can carry out backfill slightly expanded concrete 2 in advance, adopt the method detection end of physical prospecting sonic detection to encircle come to nothing scope and the degree of depth afterwards, finally by the appropriate simple interim grouting small structure of complement, carry out contact grouting effectively.Contact grouting forms calculus by grout injection (or cement mortar), in order to coming to nothing between filling steel pipe and concrete, meet steel pipe hoop uniform stressed and with rock mass 3 coactions, guarantee the abundant transmission of internal water pressure, the integrality that has not only kept steel pipe, guarantee steel pipe, concrete and the whole stressed feature of rock mass 3, and solved the problem of coming to nothing between penstock 1 and fill concrete, increased the safety of steel pipe operation.
In said structure, grouting fairlead 4 adopts seamless steel pipe to make, and wherein the diameter of seamless steel pipe is 14mm, and length is 10～20cm.
As shown in Figure 3, the diameter of described grout hole 7 is 14mm, and hole depth is through penstock 1 wall thickness, and leads to slightly expanded concrete 2 degree of depth 20mm places.
The height of described periphery through welding 6 is more than or equal to 5mm.
The wall thickness that the height of described taper shutoff plug 5 is more than or equal to penstock 1 adds 15mm.
Embodiment of the present utility model: when penstock 1 is because of the factor such as structural configuration, concrete shrinkage or construction technology be improper, cause the gradient to be delayed in occurring " harmful coming to nothing " phenomenon at the bottom of the penstock of 45 ° between arch and fill concrete, cause that local stress is excessive, while affecting the safety of steel pipe operation, adopt structure described in the utility model to carry out contact grouting to the position of seriously coming to nothing, its contact grouting construction sequence is carried out:
(1) backfill slightly expanded concrete;
(2) after concreting finishes 60 days, carry out the inspection of physical prospecting sound wave, detect the scope of coming to nothing and the degree of depth, draw the scope exploded view that comes to nothing, then in conjunction with scale and Structural Design Requirement comprehensive discriminatory analysis temporary punching scope and the number of steel pipe;
(3) perforate: each Qu Bukong that independently comes to nothing should not be less than 2,1 grout hole (middle part, district of coming to nothing), 1 overfall steam vent (highest point), perforate aperture is φ 14mm, the grout hole place welding φ 14mm simultaneously offering, length is the seamless steel pipe of 10～20cm, to connect with inlet pipe, the shutoff after perforate and perforate as shown in Figures 2 and 3; Hole depth must be bored 20mm again through penstock 1 wall; Must strictly control the size in the interim hole of complement, record number and the position of perforate during perforate, anti-leak-stopping envelope;
(4) grouting: by the air pressure check connection situation of coming to nothing, blow out dirt and ponding in the scope of coming to nothing before contact grouting, blast is 0.2MPa.Slurries adopt cement paste, and grout coordinate ratio can adopt 0.8:1, two of 0.6:1 than level, to become successively slurry, and mix water reducing agent (diffusant) to improve the mobility of slurries self; Grouting pressure must be no more than design code value with the distortion of control steel lining and be as the criterion, and can determine according to the size of the thickness of steel lining, cavity areas and the actual conditions such as degree of coming to nothing, and aperture grouting pressure is preferably 0.10～0.25MPa; Grouting parameter can be adjusted according to actual grouting situation; In filling process, should knock, shake the steel lining within the scope of grouting.In filling process, should follow the principle of pouring into successively from low to high; In filling process, should monitor, prevent steel pipe external pressure unstability accident;
(5) grouting ending standard: midge not under design grouting pressure, till continuing 5min;
(6) grouting quality inspection: carry out after grouting finishes 7 days, adopt hammering method to check, cavity areas is less than 0.5m
2for qualified; Carry out at most 2 contact groutings;
(7) sealing of hole: steel pipe plugging holes should carry out after grouting quality inspection, during shutoff cleans out hole wall dirt, and taper shutoff plug 5 is embedded in concrete and adopts welding method shutoff after 20mm; During sealing of hole, perforate number must be carefully checked, envelope must not be leaked;
(8) each hole adopts 100% colorant or magnetic particle testing, qualifiedly rear open surface crator is polished and carries out preservative treatment.
Claims (5)
1. an embedded penstock contact grouting structure, comprise penstock (1) and be arranged at the slightly expanded concrete (2) in penstock (1) outside, it is characterized in that: on described penstock (1), offer some grout holes (7), at grout hole (7), locate to be welded with grouting fairlead (4), in the grout hole of offering (7), be provided with taper shutoff plug (5), on taper shutoff plug (5) top, by periphery through welding (6), carry out shutoff.
2. a kind of embedded penstock contact grouting structure according to claim 1, is characterized in that: described grouting fairlead (4) adopts seamless steel pipe to make, and wherein the diameter of seamless steel pipe is 14mm, and length is 10～20cm.
3. a kind of embedded penstock contact grouting structure according to claim 1, it is characterized in that: the diameter of described grout hole (7) is 14mm, and hole depth is passed penstock (1) wall thickness, and lead to slightly expanded concrete (2) degree of depth 20mm place.
4. a kind of embedded penstock contact grouting structure according to claim 1, is characterized in that: the height of described periphery through welding (6) is more than or equal to 5mm.
5. a kind of embedded penstock contact grouting structure according to claim 1, is characterized in that: the wall thickness that the height of described taper shutoff plug (5) is more than or equal to penstock (1) adds 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255917.1U CN203890978U (en) | 2014-05-19 | 2014-05-19 | Contact grouting structure for buried pressure pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255917.1U CN203890978U (en) | 2014-05-19 | 2014-05-19 | Contact grouting structure for buried pressure pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203890978U true CN203890978U (en) | 2014-10-22 |
Family
ID=51717400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255917.1U Active CN203890978U (en) | 2014-05-19 | 2014-05-19 | Contact grouting structure for buried pressure pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203890978U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018476A (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 contact grouting structure and grouting technology |
| CN104372775A (en) * | 2014-12-05 | 2015-02-25 | 国家电网公司 | Pumped storage power station pressure steel tube slurry injection hole seal welding method and seal welding structure |
| CN109469493A (en) * | 2018-11-21 | 2019-03-15 | 中国水利水电第四工程局有限公司 | It is a kind of backfill and consolidation grouting telescoping steel form pre-embedment grouting pipe structure |
-
2014
- 2014-05-19 CN CN201420255917.1U patent/CN203890978U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018476A (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 contact grouting structure and grouting technology |
| CN104372775A (en) * | 2014-12-05 | 2015-02-25 | 国家电网公司 | Pumped storage power station pressure steel tube slurry injection hole seal welding method and seal welding structure |
| CN109469493A (en) * | 2018-11-21 | 2019-03-15 | 中国水利水电第四工程局有限公司 | It is a kind of backfill and consolidation grouting telescoping steel form pre-embedment grouting pipe structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101230570A (en) | Layered multitime pressure regulating pulp conditioning casting method | |
| CN203890978U (en) | Contact grouting structure for buried pressure pipe | |
| CN105887886A (en) | Strong karst development stratum curtain grouting construction method | |
| CN205857190U (en) | A kind of steel-pipe pile segmenting slip casting structure | |
| CN102409674B (en) | Cloth bag wall protection micro pile and construction method thereof | |
| CN104018476A (en) | Embedded type penstock contact grouting structure and grouting technology | |
| CN203702071U (en) | Water inrush preventing drill ejecting device for water exploration and grouting construction of vertical shaft | |
| CN204491645U (en) | A kind of deep foundation pit precipitation well-sealing device | |
| CN203795482U (en) | Piping handling device at foundation pit bottom | |
| CN210370586U (en) | Water outlet elevation drilling and grouting water stopping device | |
| CN104018475B (en) | A kind of embedded penstock backfill grouting structure and grouting process thereof | |
| CN203430466U (en) | Drill hole sealing device for gas extraction of coal mine | |
| CN207419484U (en) | Penstock surface grouting built-in pipe arrangement | |
| CN206233204U (en) | A kind of embedded penstock surface grouting hole sealing structure | |
| CN203890980U (en) | Backfilling and grouting structure for buried pressure pipe | |
| CN211448734U (en) | Slip casting steel floral tube | |
| CN204662467U (en) | Underground structure dewatering well sealing water device | |
| CN213953625U (en) | Hole sealing construction device for elevation grouting hole of underground tunnel | |
| CN102797483A (en) | Pile casing and water-rich strata shield pile casing receiving method | |
| CN205224047U (en) | Large diameter pile bottom ring shape slip casting ware | |
| CN207300818U (en) | Crack rock testing permeability device | |
| CN206902765U (en) | A kind of antiseepage sand device | |
| CN207176693U (en) | A kind of plug for pressure steel pipe of hydropower station grouting construction | |
| CN102587674A (en) | Method for grouting pre-stress duct | |
| CN202099803U (en) | Post grouting device of enlarged head of prestressed concrete tube pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |