CN205399361U - Water delivery tunnel steel lining bottom contact arrangement structure that is in milk - Google Patents
Water delivery tunnel steel lining bottom contact arrangement structure that is in milk Download PDFInfo
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- CN205399361U CN205399361U CN201620075001.7U CN201620075001U CN205399361U CN 205399361 U CN205399361 U CN 205399361U CN 201620075001 U CN201620075001 U CN 201620075001U CN 205399361 U CN205399361 U CN 205399361U
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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 relates to a water delivery tunnel steel lining bottom contact arrangement structure that is in milk. The utility model provides a convenient, safety, the water delivery tunnel steel lining bottom contact arrangement structure that is in milk that the reliability is high, its pre -buried pipe is small in quantity, and the engineering cost is saved, and construction process is simple, does not disturb the construction, can improve the effect and the quality of surface grouting, has obvious project benefit. The utility model provides a: the water delivery tunnel adopts embedded steel lining structure, and with the concrete backfill between steel lining outer wall and the country rock, steel lining outer wall every sets up the stiffening ring one for one section, is equipped with a plurality of thick liquid holes of scurrying on the stiffening ring, needs the tunnel of surface grouting be a grout compartment with per 30~50m, in every grout compartment, hugs closely steel lining bottom plate outer wall and leads to and longly lay into thick liquid guan bingjun scurrying from the stiffening ring and starch the hole and pass, in every grout compartment, per 5~8m sets up a double slurry return pipe of exhaust, and 5~8m of tip scope of the double slurry return pipe of exhaust is established to the floral tube section, and the scurrying thick liquid hole on the floral tube duan juncong stiffening ring is passed.
Description
Technical field
This utility model relates to surface grouting arrangement bottom a kind of water-conveyance tunnel steel lining, it is adaptable to Hydraulic and Hydro-Power Engineering.
Background technology
The water-conveyance tunnel of Hydraulic and Hydro-Power Engineering, when running into extreme terrain or geological conditions, generally adopts embedded steel liner structure design, to reach the purposes such as carrying or antiseepage.For realizing the sharing lood of steel lining and country rock, adopting concrete backfill between steel lining outer wall and country rock, the load part undertaken by steel lining passes to country rock.Meanwhile, the ability stable for improving steel liner structure critical external compressive resistance, generally stiffening ring is set at steel lining outer wall, the general 1.0～1.5m of spacing.For improving concrete backfill compaction rate, stiffening ring is arranged and alters slurry hole.
From the construction level of current domestic average advanced person and most case history, after fill concrete has built 60 days, through knocking inspection, phenomenon of coming to nothing bottom steel lining is still comparatively general, and the region area that comes to nothing is more than 0.5～1.0m2Also not within minority.Consider from the angle guaranteeing steel liner structure safety, it is necessary to carry out the surface grouting bottom steel lining.Current surface grouting design generally has following several ways:
(1) steel lining base plate predetermined system surface grouting hole, the general 3.0m of spacing.This mode is useful in low-alloy steel, and (standard pull tension intensity is less than 540N/mm2) in, such as Hydraulic and Hydro-Power Engineering steel lining common steels such as 16MnR, Q345.Due to position of coming to nothing, quantity cannot Accurate Prediction, therefore reserved surface grouting hole is poor with the identical property in region of coming to nothing, have that preformed hole position is closely knit and that come to nothing phenomenon without preformed hole position, thus reserve the poor effect in surface grouting hole, and due to system perforate, cause later stage closure quantities big, add grouting hole plugging and ooze the probability of (leakage) water, engineering safety is unfavorable.
(2) later stage is drilled with surface grouting hole.In view of in aforesaid way (1), the identical property of preformed hole is poor, many engineerings select later stage well cementing, and (standard pull tension intensity is less than 540N/mm to be useful in low-alloy steel2) in.After steel lining outer wall fill concrete completes 60 days, by knocking or other means check that base plate comes to nothing position, adopting magnetic support electric drill to be drilled with slurry-feeding hole and steam vent on steel lining, aperture is not less than 12mm, then carries out surface grouting.Although can be in the milk in region of coming to nothing by which targetedly, but when quantity of coming to nothing is more, its perforate, sealing of hole quantity are still more, there is also the risk of steel plate borehole sealing seepage equally.When steel plate thickness is more than 30mm, generally bore diameter being enlarged to 20～24mm, to realize surface grouting operation, but construction still acquires a certain degree of difficulty, and steel plate thickness is more big, and borehole sealing difficulty also strengthens.Additionally, when bore diameter is bigger, steel lining itself is had certain weakening, and stiffening plate cannot be arranged, therefore that structure is unfavorable.
(3) base plate adopts pre-buried surface grouting pipe.The suitability of this mode is not limited by steel strength, and high-strength steel such as 600MPa level, 800MPa level steel, for avoiding welding stress and bead crack, it is common that not in perforate on steel lining, therefore for the steel lining base plate of high-strength steel, then can only prior pre-buried surface grouting pipe.2～3 grout boxs every the pre-buried grout box of 2.0～3.0m, and are connected on a grout pipe along steel lining base plate by which, and grout pipe is drawn outside fill concrete lift surface.Just carrying out after completing 60 days due to concretings such as surface grouting need, for ensureing construction speed, the surface grouting built-in pipe quantity of extraction is many, pipeline section is long, and construction interference is relatively big, also uneconomical, and grouting effect is bad.
Summary of the invention
The technical problems to be solved in the utility model is: for above-mentioned Problems existing, surface grouting arrangement bottom the water-conveyance tunnel steel lining that a kind of property convenient, safe and reliable is high is proposed, its built-in pipe quantity is few, engineering cost is saved, construction technology is simple, construction is not interfered with, effect and the quality of surface grouting can be improved, there is obvious project benefit.
This utility model be the technical scheme is that surface grouting arrangement bottom a kind of water-conveyance tunnel steel lining, described water-conveyance tunnel adopts embedded steel liner structure, with concrete backfill between steel lining outer wall and country rock, described steel lining outer wall arranges one stiffening ring every one section, stiffening ring is provided with some altering and starches hole, it is characterized in that: need the tunnel of surface grouting with every 30～50m for a grout compartment, in each grout compartment, be close to steel lining base plate outer wall elongated lay pulp-inlet pipe and all from stiffening ring altering slurry hole traverse；In each grout compartment, every 5～8m arranges an aerofluxus and holds concurrently return pipe, and hold concurrently end 5～8m scope of return pipe of this aerofluxus is set to floral tube section, and floral tube Duan Juncong stiffening ring altering the traverse of slurry hole.
Having preformed hole on described steel lining base plate, each preformed hole is held concurrently corresponding to every aerofluxus the tail end of return pipe.
Described pulp-inlet pipe is the FUKO pipe of pvc material；Described aerofluxus hold concurrently return pipe adopt Φ 25～Φ 32 seamless steel pipe.
Bottom a kind of water-conveyance tunnel steel lining, surface grouting arrangement carries out the method being in the milk, including step:
1, the burying underground of pulp-inlet pipe: taking 30～50m is a grout compartment, in each grout compartment, is close to the elongated pulp-inlet pipe that lays of steel lining base plate outer wall, pulp-inlet pipe is all from altering traverse slurry hole bottom stiffening ring；
2, aerofluxus is held concurrently the burying underground of return pipe: in each grout compartment, and every 5～8m arranges an aerofluxus and holds concurrently return pipe, and end 5～8m is floral tube section, and floral tube section is from altering traverse in slurry hole bottom stiffening ring；Described floral tube section at least arranges the boring of a Φ 8mm every 50cm, and drilling hole position all upward and is arranged point-blank；
3, the extraction of built-in pipe: return pipe is held concurrently all from nearest free face extraction for high-strength steel lining, pulp-inlet pipe and aerofluxus.
Bottom this utility model another kind water-conveyance tunnel steel lining, surface grouting arrangement carries out the method being in the milk, including step:
1, for low-alloy steel lining, taking 30～50m is a grout compartment, in each grout compartment, steel lining base plate offers a preformed hole every 5～8m, and arranges plug and closure plug in reserved aperture；
2, the burying underground of pulp-inlet pipe: in each grout compartment, be close to the elongated pulp-inlet pipe that lays of steel lining base plate outer wall, pulp-inlet pipe is all from altering traverse slurry hole bottom stiffening ring；
3, aerofluxus is held concurrently the burying underground of return pipe: in each grout compartment, and every 5～8m arranges an aerofluxus and holds concurrently return pipe, and end 5～8m is set to floral tube section, floral tube section from altering traverse in slurry hole bottom stiffening ring, the tail end alignment preformed hole of floral tube section；Described floral tube section at least arranges the boring of a Φ 8mm every 50cm, and drilling hole position all upward and is arranged point-blank；
4, the extraction of built-in pipe: in each grout compartment, described aerofluxus return pipe of holding concurrently is drawn from corresponding preformed hole (1-1), and pulp-inlet pipe is only drawn from the preformed hole of most termination, after waiting to be in the milk, cut off the pipe laying of extraction, and preformed hole is carried out closure welding.
The beneficial effects of the utility model are: surface grouting design bottom steel lining of the present utility model, although the mode of the pre-buried surface grouting pipe of the system that still falls within, but holding concurrently return pipe pattern from pulp-inlet pipe, aerofluxus and built-in pipe lead-out mode aspect has carried out bigger improvement, it has the beneficial effect that the following aspects: (standard pull tension intensity is less than 540N/mm 1, to solve low-alloy steel2) steel lining reserved surface grouting hole mode do not have drawback targetedly, it is possible to effectively it is in the milk in position of being come to nothing in often place；2, (standard pull tension intensity is less than 540N/mm to improve low-alloy steel2) the sealing of hole quantity that may result in of steel lining later stage well cementing mode too much, security hidden trouble that risk of leakage is bigger；3, special pulp-inlet pipe is adopted, it is possible to realize continuous, multiple spot pulp, and when fill concrete is built, grout outlet will not be plugged；Pulp-inlet pipe position of can not only steel lining base plate being come to nothing carries out effective surface grouting, also the fine gap between steel lining and fill concrete can be carried out filling closely knit simultaneously；Owing to being multiple spot pulp, therefore surface grouting will not be subject to the impact of cavity discontinuity；4, aerofluxus return pipe of holding concurrently adopts step-by-step arrangement, and is close to position with steel lining outer wall and is set to floral tube form, therefore has the function of segmentation aerofluxus；Though the stiffening ring of embedded outer wall of steel pipe alters slurry hole, but the seriality in the region that also is difficult to ensure to come to nothing；Have employed the floral tube form of segmentation aerofluxus, when surface grouting, it is possible to getting rid of empty intracavity gas completely, Grouted density is highly beneficial to improving；5, built-in pipe quantity of the present utility model is few, and engineering cost is saved, and construction technology is simple, construction is not interfered with, and is greatly improved effect and the quality of surface grouting, have obvious project benefit.
Accompanying drawing explanation
Fig. 1 is cross-section cutaway view of the present utility model.
Fig. 2 is the partial enlarged drawing altering slurry hole portion in this utility model.
Fig. 3 is the A-A profile of high-strength steel steel lining in utility model.
Fig. 4 is the A-A profile of utility model middle-low alloy steel steel lining.
Detailed description of the invention
(standard pull tension intensity is less than 540N/mm according to low-alloy steel for the present embodiment2) and high-strength steel between the characteristic of material, it then follows low-alloy steel can perforate, high-strength steel not perforate principle, carry out surface grouting design bottom water-conveyance tunnel steel lining.
As shown in Figure 1 and Figure 2, the present embodiment is surface grouting arrangement bottom a kind of water-conveyance tunnel steel lining, water-conveyance tunnel adopts embedded steel liner structure, with concrete backfill between steel lining 1 outer wall and country rock, steel lining 1 outer wall arranges one stiffening ring 2 every one section, stiffening ring is provided with some altering and starches hole 3, need the tunnel of surface grouting with every 30～50m for a grout compartment, in each grout compartment, it is close to that steel lining 1 base plate outer wall is elongated to be laid the pulp-inlet pipe FUKO of the pvc material (pipe) 4 and all starch hole 3 from altering stiffening ring 2 and pass；In each grout compartment, every 5～8m arranges an aerofluxus and holds concurrently return pipe 5, and hold concurrently end 5～8m scope of return pipe of this aerofluxus is set to floral tube section 5-1, and the altering slurry hole 3 on floral tube Duan Juncong stiffening ring 2 is passed.
Embodiment one,
As it is shown on figure 3, steel lining 1 is high-strength steel steel lining, it is embodied as step as follows:
1, the burying underground of pulp-inlet pipe 4: taking 30～50m is a grout compartment (can control very well to be as the criterion with grouting pressure and grouting quality), in each grout compartment, being close to that steel lining 1 base plate outer wall is elongated lays pulp-inlet pipe 4, pulp-inlet pipe is all from altering traverse slurry hole 3 bottom stiffening ring 2；Pulp-inlet pipe 4 does not adopt the seamless steel pipe of routine, and select to adopt have on the market sell and in some Hydropower Project existing use a kind of along whole tube section can pulp and can only pulp without entering special grout pipe (as the FUKO manages) material of slurry；
2, aerofluxus is held concurrently the burying underground of return pipe 5: consider to ensure the quality of surface grouting, reduce the quantity of pipe laying again as far as possible, in each grout compartment, every 5～8m arranges an aerofluxus and holds concurrently return pipe 5, end 5～8m is floral tube section 5-1, and floral tube section starches traverse in hole 3 from altering bottom stiffening ring 2, is close to steel lining outer wall and arranges and fixed, aerofluxus hold concurrently return pipe 5 remaining pipeline section then from the outside of stiffening ring 2 through (should not from stiffening ring alter slurry hole in traverse, otherwise impact alter slurry effect)；Floral tube section 5-1 at least arranges the boring (namely the floral tube section between every twice stiffening ring 2 is at least provided with a boring) of a Φ 8mm every 50cm, and drilling hole position all upward and is arranged point-blank；
3, the extraction of built-in pipe: for high-strength steel lining, perforate is not allowed due to steel lining, pulp-inlet pipe 4 and aerofluxus hold concurrently return pipe 5 all from nearest free face extraction, under normal circumstances, the steel lining hole section of Hydraulic and Hydro-Power Engineering water-conveyance tunnel employing high-strength steel is general shorter, therefore the extraction length of built-in pipe will not be oversize, and grouting and exhaust effect are substantially free of impact.
Embodiment two,
As shown in Figure 4, steel lining is low-alloy steel steel lining, is embodied as step as follows:
1, for low-alloy steel lining, (standard pull tension intensity is less than 540N/mm2), taking 30～50m is a grout compartment (can control very well to be as the criterion with grouting pressure and grouting quality), owing to steel lining 1 can perforate, in each grout compartment, steel lining 1 base plate offers a preformed hole 1-1 every 5～8m, and plug and closure plug (preformed hole 1-1 aperture can refer to consolidation grouting hole and arranges the component such as plug, closure plug) are set in reserved aperture；
2, the burying underground of pulp-inlet pipe 4: in each grout compartment, is close to that steel lining 1 base plate outer wall is elongated lays pulp-inlet pipe 4, and pulp-inlet pipe is all from altering traverse slurry hole 3 bottom stiffening ring 2；
3, aerofluxus is held concurrently the burying underground of return pipe 5: consider to ensure the quality of surface grouting, reduce the quantity of pipe laying again as far as possible, in each grout compartment, every 5～8m arranges an aerofluxus and holds concurrently return pipe 5, end 5～8m is set to floral tube section 5-1, floral tube section starches traverse in hole 3 from altering bottom stiffening ring 2, the tail end alignment preformed hole 1-1 of floral tube section；Floral tube section at least arranges the boring of a Φ 8mm every 50cm, and drilling hole position all upward and is arranged point-blank；
4, the extraction of built-in pipe: in each grout compartment, described aerofluxus return pipe 5 of holding concurrently is drawn from corresponding preformed hole 1-1, and pulp-inlet pipe 4 is only drawn from the preformed hole 1-1 of most termination, after waiting to be in the milk, cuts off the pipe laying of extraction, and preformed hole carries out closure welding.
The aerofluxus of above-described embodiment return pipe 5 of holding concurrently adopts the seamless steel pipe of Φ 25～Φ 32.
Claims (4)
1. surface grouting arrangement bottom a water-conveyance tunnel steel lining, described water-conveyance tunnel adopts embedded steel liner structure, steel lining (1) between outer wall and country rock with concrete backfill, described steel lining (1) outer wall arranges one stiffening ring (2) every one section, stiffening ring is provided with some altering and starches hole (3), it is characterized in that: need the tunnel of surface grouting with every 30～50m for a grout compartment, in each grout compartment, be close to steel lining (1) base plate outer wall elongated lay pulp-inlet pipe (4) and all from stiffening ring (2) altering slurry hole (3) traverse；In each grout compartment, every 5～8m arranges an aerofluxus and holds concurrently return pipe (5), hold concurrently end 5～8m scope of return pipe of this aerofluxus is set to floral tube section (5-1), and floral tube Duan Juncong stiffening ring (2) altering slurry hole (3) traverse.
2. surface grouting arrangement according to claim 1, it is characterised in that: having preformed hole (1-1) on described steel lining (1) base plate, each preformed hole is held concurrently corresponding to every aerofluxus the tail end of return pipe (5).
3. surface grouting arrangement according to claim 1, it is characterised in that: the FUKO that described pulp-inlet pipe (4) is pvc material manages；Described aerofluxus hold concurrently return pipe (5) adopt Φ 25～Φ 32 seamless steel pipe.
4. surface grouting arrangement according to claim 2, it is characterised in that: the FUKO that described pulp-inlet pipe (4) is pvc material manages；Described aerofluxus hold concurrently return pipe (5) adopt Φ 25～Φ 32 seamless steel pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620075001.7U CN205399361U (en) | 2016-01-26 | 2016-01-26 | Water delivery tunnel steel lining bottom contact arrangement structure that is in milk |
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| CN201620075001.7U CN205399361U (en) | 2016-01-26 | 2016-01-26 | Water delivery tunnel steel lining bottom contact arrangement structure that is in milk |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544481A (en) * | 2016-01-26 | 2016-05-04 | 中国电建集团华东勘测设计研究院有限公司 | Bottom contact grouting arrangement structure of water conveyance tunnel steel lining and grouting method thereof |
| CN110144852A (en) * | 2019-04-26 | 2019-08-20 | 中国电建集团华东勘测设计研究院有限公司 | A kind of plate-steel liner lower concrete construction method |
| CN117569271A (en) * | 2023-11-23 | 2024-02-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Construction method for steel pipe lining in linear hydraulic tunnel |
-
2016
- 2016-01-26 CN CN201620075001.7U patent/CN205399361U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544481A (en) * | 2016-01-26 | 2016-05-04 | 中国电建集团华东勘测设计研究院有限公司 | Bottom contact grouting arrangement structure of water conveyance tunnel steel lining and grouting method thereof |
| CN110144852A (en) * | 2019-04-26 | 2019-08-20 | 中国电建集团华东勘测设计研究院有限公司 | A kind of plate-steel liner lower concrete construction method |
| CN117569271A (en) * | 2023-11-23 | 2024-02-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Construction method for steel pipe lining in linear hydraulic tunnel |
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