CN1800510A - Prestressing force concrete pipe pile for low-temperature geothermal energy conversion - Google Patents
Prestressing force concrete pipe pile for low-temperature geothermal energy conversion Download PDFInfo
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- CN1800510A CN1800510A CNA2006100165442A CN200610016544A CN1800510A CN 1800510 A CN1800510 A CN 1800510A CN A2006100165442 A CNA2006100165442 A CN A2006100165442A CN 200610016544 A CN200610016544 A CN 200610016544A CN 1800510 A CN1800510 A CN 1800510A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
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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
- Y02E10/10—Geothermal energy
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- General Life Sciences & Earth Sciences (AREA)
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- Sustainable Energy (AREA)
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- Combustion & Propulsion (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a low-temperature terrestrial heat exchange pre-stress concrete post, which arranges pipe heat exchange devices in variable shape in the posts to carry, baffle soil and strengthen the base, while it can process low-temperature terrestrial heat exchange in lower layer to realize the function of pipe heat exchange laid by post and terrestrial heat pump prefabricated hole. In the inner hole of pre-stress concrete post operated by closed steel post sharp, the U-shape heat exchanger, screw coil-pipe heat exchanger or other pipe heat exchanger is directly laid, while the space between the inner wall of post and the pipe heat exchanger is filled by stuffing. The pipe heat exchangers in the post are connected to the ground pipe line, and the pipe line of heat exchanger is filled by exchanging liquid. The invention via the heat exchange between exchange liquid, stuffing, post, and around soil-water system, form a underground low-temperature terrestrial heat exchanger of closed terrestrial heat pump.
Description
Affiliated technical field:
The present invention relates to a kind of hollow stake heart that utilizes prestressed concrete pipe pile and bury the tubular exchanger device underground and carry out the cryogenically prestressed concrete pipe pile of thermal power transfer, this device not only has the bearer properties of pile foundation but also possess the cryogenically multi-functional prestressed concrete pipe pile of heat energy cycle heat exchange ability.
Background technology:
At present, known prestressed concrete pipe pile mainly is meant the ring section stake of pretensioning prestressed concrete.The pile tube product specification mainly contains prestressed high strength concrete pile tube (code name PC), prestressed concrete pipe pile (code name PHC), thin tubular piles produced by prestressed concrete (code name PTC), the external diameter of different model prestressed concrete pipe pile, mechanical property, raw material and structure requirement, design, select for use, produce and check and accept, aspects such as pile sinking require all to meet national standard atlas " prestressed concrete pipe pile " (atlas 03SG409), " Pretensioned spun concrete piles " (GB13476-1999), " pretensioning prestressed concrete thin-wall pipe pile " (JC888-2001), respective specified in " static pressure pipe pile basic technology regulation (provisional) " (Shenyang City committee of municipal and rural construction, 2004).Adopt sunk by hammer or static pressure method pile sinking, the sunk by hammer construction needs to carry out People's Republic of China's industry standard " technical code for building pile foundation " (JGJ94-94).The static pressure method pile sinking is with static load pile tube to be pressed into the job practices of soil (rock) layer, and adopting machinery mainly is fluid pressure type pile press, top pressing type hydraulic pressure pile press, hugging pressure type hydraulic pressure pile press.The static pressure method piling construction need be carried out the various places related specifications, and northern area can be with reference to carrying out " static pressure pipe pile basic technology regulation (provisional) " (Shenyang City committee of municipal and rural construction, 2004).
The structure of each bore prestressed concrete pipe pile generally is by different labels concrete, reinforcing cage, has (nothing) to fill out core concrete, formations such as (nothing) cross or pyramid type stake point is arranged, cross section is the building pile foundation of annular or nearly annular, plays effects such as carrying, retaining support, ground stabilization.But the function of still not having the geothermic gradient utilized, this has ignored the heat exchange effect of burying of prestressed concrete pipe pile.And in the middle-latitude zone, ground temperature is compared with ground environment, the following annual ground temperature of 5-10m can be stable at year-round average temperature substantially, can be respectively provide in two seasons of winter in summer relatively low condensation temperature and higher evaporating temperature (Gaoqing, in ring, the development and utilization of efficient height, heating and cooling equipment one earth source heat pump that environmental protection efficacy is good, the Jilin Industry University natural science journal, in April calendar year 2001, Vol.31 (2): 96-102), this is the operating principle of earth source heat pump.The pipe laying method of ground source heat pump technology mainly is that U type polyethylene pipe is directly buried in prebored hole underground at present, its expense is very high, generally can account for the over half of gross investment, initial cost (Jiang Baocheng, the Wang Yong boomerang of electric heat pump under the same terms etc., LiBing Xi, the Technological Economy evaluation of earth source heat pump, Harbin Institute of Technology's journal, the 35th the 2nd phase of volume of February in 2003,195-202), this causes difficulty for the development of this technology.In addition, this boring direct burial U type tubular exchanger construction technology complexity, need be in U type pipe bend portion colligation weight increases counterweight, U type pipe pre-filling heat-exchange fluid, manage down with manpower, effort and precision are difficult to guarantee (village winter jasmine, Sun Youhong, the construction of the underground direct burial heat exchanger of earth source heat pump, mineral exploration engineering (rock and soil drilling engineering), 2002, No.3:10-11).About pipe laying in the stake, the domestic people of having proposed the notion of U type stake buried tube heat exchanger, but this method in essence still the boring of traditional earth source heat pump directly bury the improvement of U type heat exchanger tube underground, only the filler in the boring is changed into cement paste, do not consider the carrying problem.(Zhao Jun, Li Xinguo etc., earth source heat pump be in actual application in engineering and research, building construction technology (tianjin building science and technology), and 2003, No.5:14-16).Though external also someone put forward the notion that heat exchanger is buried in stake, but all be based on high-strength polyethylene U type coil pipe perfusion solid section stake (Laloui Lyesse, Moreni Matteo, Vulliet Laurent, Behavior of a bi-functional pile, foundation and heatexchanger, Canadian Geotechnical Journal, v 40, and n 2, April, 2003, p 388-402.), these based on the shortcoming of burying tubular exchanger in boring or the various solid section stake underground are: boring expense height, coil heat exchanger construction in the solid section stake is complicated, needs operations such as coil pipe assembling reinforcement cage.And the coil pipe position local material softened zone and stress can occur and concentrates in all kinds of solid section stakes, influence pile quality, to traditional load-carrying properties generation detrimental effect of pile foundation.The tubular exchanger of various in addition polyethylene materials is extruded the risk of destruction in addition.
Summary of the invention
What is called is heat energy (Low Temperature Earth-heat-energy) cryogenically, is meant the low-temperature heat energy that absorbs solar energy, geothermal energy in surface soil, underground water or river, the lake and contain.Existing prestressed concrete pipe pile is only considered to carry in order to overcome, support action and ignore the function that it utilizes the geothermal using gradient, and it is complicated and to the reality of the adverse effect of solid section pile foundation to change the construction of expensive, all kinds of tubular exchanger of closed ground source heat pump technology initial bore hole, the present invention can provide a kind of prestressing force concrete pipe pile for low-temperature geothermal energy conversion, this pile foundation can not only carrying, retaining support, ground stabilization, and can carry out the cryogenically closed circulation conversion of heat energy of shallow-layer easily.
The technical solution adopted for the present invention to solve the technical problems is: prestressed concrete pipe pile that the present invention adopts and the normally production of prestressed concrete pipe pile at present, the stake type, size, mechanical property, raw material and structure requirement, design, type selecting, produce and check and accept, pile sinking is just the same, all by national existing relevant specification (national standard atlas " prestressed concrete pipe pile " (atlas 03SG409), " Pretensioned spun concrete piles " (GB13476-1999), " pretensioning prestressed concrete thin-wall pipe pile " (JC888-2001), People's Republic of China's industry standard " technical code for building pile foundation " (JGJ94-94), " static pressure pipe pile basic technology regulation (provisional) " (Shenyang City committee of municipal and rural construction, 2004)) carry out.Carrying out the pile tube design, producing, only require when constructing in pile driving process (sunk by hammer or static pressure method pile sinking), the soil layer what state all must adopt closed piling bar point (cross, pyramid type).
After the prestressed concrete pipe pile pile sinking is finished, in the pile tube pipe orifice, pass through the tubular exchanger of manpower or mechanical underlying high-strength polyethylene or PVC or PPR material, caliber is generally 19mm-38mm, it is long that the pipe vertical height is equal to stake approximately, its tubular exchanger bottom is apart from the sharp 1m-2m of stake, its tubular exchanger outlet makes progress and the certain thickness heat insulating material of colligation, the length of colligation is about 0.5m-2.0m, the outer span pile tube inwall of tubular exchanger is between 30mm-100mm, and shape can be a U type heat exchanger tube, other type heat exchanger tube in screw type coil pipe or " boring direct burial " method.Settle one or more groups all kinds of tubular exchangers according to the actual heating load needs in the pile tube pipe orifice, all kinds of backfilling materials of landfill in pipe orifice subsequently are as near stratum soil (rock) expansive soil, cement paste, sand, stone or the backfill.Operation mechanism according to earth source heat pump, these tubular exchangers are fixed in the pipe orifice of pile tube by backfilling material, filling heat-exchange fluid in the tubular exchanger, this fluid adopts water, salt solution or various antifreezing agent solution usually, form cryogenically heat energy circulating system of enclosed type, each model earth source heat pump unit of face of land exchange pipeline, water pump and the satisfied actual different capacity that requires is installed.Thermostat layer by the exchange media in the tubular exchanger and backfilling material, pile body and shallow soil water system carries out the cycling hot exchange, and reach the purpose that energy transforms by the earth source heat pump unit, play the effect of central air-conditioning, if auxiliary then can provide central hot water system institute calorific requirement with devices such as central heaters.
The invention has the beneficial effects as follows, can be in the traditional carrying of performance prestressed concrete pipe pile, retaining support, ground stabilization, carry out the closed circulation conversion of superficial part geothermal energy easily, in the pipe orifice of prestressed concrete pipe pile, adopt tubular exchangers such as U type pipe, screw type coil pipe, can play the same effect of traditional closed earth source heat pump boring pipe laying, but save the correlative charges of prebored hole.And the temperature load effect that cycle heat exchange produces does not have influence to pile foundation traditional mechanics ability in the working range of steel concrete.
All kinds of tubular exchanger technology are set in the pile tube pipe orifice that adopts in this pile foundation can eliminate the various defectives of buried tube heat exchanger solid section stake (in the solid section stake because the pile body local material softened zone that polyethylene exchange pipe causes), can reach all indexs of the embedding heat exchanger of vertical drilling fully.In addition, this technology can also arbitrarily be provided with the group number of tubular exchanger, is example with U type heat exchanger tube, can require to be provided with 1 group, 2 groups or organize U type heat exchanger tube according to heat requirement more.Tubular exchanger is in the pile tube pipe, do not influence the normal construction efficient and the pile body structure (polyethylene exchange pipe needs colligation on reinforcing cage in the solid section stake) of prestressed concrete pipe pile, (when soil property is softer) increases a closed piling bar point only in some cases.Because the I technology of executing of prestressed concrete pipe pile has avoided holing problems such as undergauge, the quicksand that may occur, the hole of collapsing, pile tube also plays the effect of borehole casing simultaneously, thereby make and bury heat exchanger underground at the pile tube pipe orifice and be able to smooth construction, greatly improved the constructional difficulties of burying tubular exchanger underground.
Secondly owing to need all kinds of backfilling materials of filling around the tubular exchanger of pile tube pipe orifice, that can save prestressed concrete pipe pile fills out core concrete cost of materials and labour cost, has also strengthened the whole mechanical property of pile tube simultaneously.Last because backfilling material can Artificial Control, can dispose the backfilling material of the optimum coefficient of conductivity according to different areas, different geological conditions, to increase heat exchanger effectiveness.
This technology at first is a kind of of closure earth source heat pump, has the innate advantage of closed ground source heat pump technology.It can eliminate the groundwater pollution problem in the source heat pump technology openly, also can avoid the operating groundwater resources usage charges of open system.Secondly at the closed ground source heat pump technology prebored hole of tradition, directly bury the not high construction shortcoming of complex procedures, precision such as U type heat exchanger tube underground, and the expensive excessive problem of ground source heat pump technology initial outlay that causes of whole embedding heat exchanger, this pile foundation technology can be avoided prebored hole and bury the heat exchanger tube cost underground, the construction problem that only this item cost-saved nearly half and the direct-burried heat exchanger tube of avoiding holing bring.Can built-inly flexibly organize various heat exchanger tubes in the pile foundation in addition more: U type heat exchanger tube, screw type coil pipe or their combination, further reduce construction cost.As seen these technical measures will lower the comprehensive cost of whole earth source heat pump, earth source heat pump itself has the environmental protection and energy saving function, and China is manually cheap, prestressed concrete pipe pile market is huge, if cooperate promoting the use of of present technique, to bring hundreds of millions of economic benefits and environmental benefit every year, can save a large amount of non-renewable strategic resources such as oil coal for country again.
Description of drawings:
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is an earth source heat pump schematic diagram of the present invention.
Fig. 2 is the D structure figure of the built-in three groups of U type heat exchanger tubes of prestressing force concrete pipe pile for low-temperature geothermal energy conversion.
Fig. 3 is the D structure figure of three groups of U type heat exchanger tubes of Fig. 2.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the drawing in side sectional elevation of Fig. 2.
Fig. 6 is the drawing of site of the vertical section I--I of Fig. 2 in the cross section.
Fig. 7 is the I-I longitudinal plan of Fig. 2.
Fig. 8 is 45 ° of oblique views of Fig. 2.
Fig. 9 is the D structure figure of one group of U type heat exchanger tube.
Figure 10 is the D structure figure of two groups of U type heat exchanger tubes.
Figure 11 is the D structure figure of the built-in screw type heat exchange coil of prestressing force concrete pipe pile for low-temperature geothermal energy conversion.
Figure 12 is the D structure figure of the screw type heat exchange coil of Figure 11.
Energy converting prestress concrete tubular pile in 1. ground among the figure, 2. superficial part soil layer, 3. face of land exchange pipeline, 4. earth source heat pump unit, 5. building, 6. replacement fluids flows into, and 7. replacement fluids returns, 8.U type tubulose heat exchanger tube, 9. replacement fluids in the pipe, 10. prestressed reinforcement, 11. spiral stirrups, 12. backfilling materials, 13. the stake inwall, 14. outer walls, 15. concrete, 16. closed stake point, 17. water inlet pipes, 18. outlet pipes, 19. the thimble tube heat exchanger tube, 20. permanent sleeve pipes, 21. screw type heat exchange coils
The specific embodiment:
In Fig. 1, earth source heat pump is the low-temperature heat energy that utilizes the shallow surface geothermal energy resources, come out heat extraction in superficial part soil layer (2) by the heat-exchange fluid in the plate-like heat exchanger in the ground energy converting prestress concrete tubular pile (1) winter, supplies with building (5) heating by face of land exchange pipeline (3) and earth source heat pump unit (4); Take out building (5) heat summer, is discharged in the superficial part soil layer (2) by the heat-exchange fluid in the tubular exchanger (1) in the face of land exchange pipeline (3), earth source heat pump unit (4) and the prestressed concrete pipe pile and goes.
In embodiment illustrated in fig. 2, ground energy converting prestress concrete tubular pile (1), its caliber has multiple regulation, and reinforcing cage is formed by prestressed reinforcement (10) and spiral stirrup (11) colligation, between stake inwall, the outer wall (13,14) is concrete (15), and the stake lower end is a closed stake point (16).Three groups of the underlyings placed in the middle polyethylene of shape or the U type heat exchanger tube (8) of PVC or PPR material as shown in Figure 3 in stake inwall (13), U type heat exchanger tube (8) outer apart from the distance of stake inwall (13) between 25mm-50mm, length is than stake length 1m, the curved neck spacing 1m of three groups of U type heat exchanger tubes (8) sees Fig. 3, and each is organized between the U type heat exchanger tube (8) angle and is 60 ° and sees Fig. 4.Filling backfilling material (12) is up to the stake top in the space between stake inwall (13) and heat exchanger tube (8), and heat exchanger (8) finally is positioned in the prestressed concrete pipe pile stake.In the stake that Fig. 5 showed (1) front elevation drawing, the position of U type heat exchanger tube (8) in pile tube (1) backfilling material (12).U type heat exchanger (8) I-I vertical section as shown in Figure 7 among position, I-I vertical section such as Fig. 6 shown in the head-on view of its (1), pile tube (1) inwall (13) backfilling material (12).45 ° of oblique views of the whole D structure figure of stake (1) as shown in Figure 8, return (7) by replacement fluids inflow (6) and replacement fluids, make the interior replacement fluids (9) of pipe in three groups of U type tubular exchangers (8) carry out interchange of heat with backfilling material (12), pile body reinforcing bar (10,11), concrete (15), superficial part soil layer (2).That Fig. 9 shows is the D structure figure of single group U type tubular exchanger (8).That Figure 10 shows is the D structure figure of two groups of U type tubular exchangers (8).
In another embodiment shown in Figure 11, ground can converting prestress concrete tubular pile (1) built-in helical disk cast heat exchanger tube (21).Helical disk cast heat exchanger tube (21) is made of polyethylene or PVC or PPR material, screw type coil pipe (21) length is than stake length 1m-2m, directly be down-set to an inwall (13) lining between two parties, and the circumferential distance of stake inwall (13) is between 30mm-50mm, filling backfilling material (12) pushes up up to stake in the space between stake inwall (13) and helical disk cast heat exchanger tube (21), Figure 12 is seen apart from the sharp 1m-2m of stake in helical disk cast heat exchanger tube (21) bottom.Return (7) by replacement fluids inflow (6) and replacement fluids, make the interior replacement fluids (9) of pipe in the helical disk cast heat exchanger tube (21) carry out interchange of heat with backfilling material (12), pile body reinforcing bar (10,11), concrete (15), superficial part soil layer (2).
Claims (10)
1. prestressing force concrete pipe pile for low-temperature geothermal energy conversion, in prestressed concrete pipe pile pipe orifice with the construction of closed piling bar point, other type heat exchanger tube in direct underlying U type tubular exchanger or screw type coil heat exchanger or " boring direct burial " method, filling backfilling material in the space of pile tube pipe orifice wall and tubular exchanger.All kinds of tubular exchangers in the pile tube pipe are connected with face of land pipeline, filling replacement fluids in the heat exchange manifold, carry out interchange of heat by the replacement fluids in the tubular exchanger system and backfilling material, tubular pile body, all soil-water systems of stake, form the underground low temperature geothermal energy interchanger of closed earth source heat pump.
2. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: settle other type heat exchanger tube in U type tubular exchanger or screw type coil heat exchanger or " boring direct burial " method in the present technique in the prestressed concrete pipe pile pipe, its prestressed concrete pipe pile that adopts is the production of present prestressed concrete pipe pile, the stake type, external diameter, mechanical property, raw material and structure requirement, design, select for use, produce and check and accept, pile sinking is just the same, all carry out by national relevant specification
3. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: in the prestressed concrete pipe pile piling construction process that present technique adopts (sunk by hammer or static pressure method pile sinking), the soil layer what state all must adopt closed piling bar point (cross, pyramid type).
4. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: after the prestressed concrete pipe pile pile sinking is finished, the tubular exchanger of all kinds of high-strength polyethylenes of underlying placed in the middle or PVC or PPR material in pipe, caliber is 19mm-38mm, it is long that the vertical height of tubular exchanger is equal to stake approximately, its tubular exchanger bottom is apart from the sharp 1m-2m of stake, and the outer span pile tube inwall of tubular exchanger is between 25mm-100mm.
5. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: the tubular exchanger of all kinds of high-strength polyethylenes of underlying or PVC or PPR material in the pile tube pipe, its shape can be the tubular exchanger of U type tube shape heat exchanger tube, screw type coil shape heat exchanger or other shape, all kinds of tubular exchangers and become the underground cycle heat exchange system of earth source heat pump down in the pile tube pipe.
6. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1 is characterized in that: the method that all kinds of tubular exchangers of underlying adopt can be manpower method or mechanical means.
7. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1 is characterized in that: near stratum soil (rock) all kinds of backfilling materials of filling in the space of pile tube internal diameter and all kinds of heat exchangers, expansive soil, cement paste, sand, stone or backfill.
8. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: being placed in all types of tubular exchangers in the pile body needs the filling heat-exchange fluid, this fluid adopts water, salt solution or various antifreezing agent solution, forms the enclosed type circulating system.
9. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: the tubular exchanger outlet makes progress and the certain thickness heat insulating material of colligation, the length of colligation is about 0.5m-2.0m, and the tubular exchanger system of formation connects face of land exchange pipeline, water pump and satisfies each model earth source heat pump unit of the actual different capacity that requires.
10. prestressing force concrete pipe pile for low-temperature geothermal energy conversion according to claim 1, it is characterized in that: be placed in the U type tubular exchanger system in the pile body or the tubular exchanger system of screw type coil heat exchanger system or other shape, can be provided with 1 group or organize high-strength polyethylene or the tubular exchanger of PVC or PPR material more.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100165442A CN1800510A (en) | 2006-01-19 | 2006-01-19 | Prestressing force concrete pipe pile for low-temperature geothermal energy conversion |
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| CNA2006100165442A CN1800510A (en) | 2006-01-19 | 2006-01-19 | Prestressing force concrete pipe pile for low-temperature geothermal energy conversion |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100578133C (en) * | 2006-08-28 | 2010-01-06 | 中国科学院电工研究所 | A high-temperature heat storage device using concrete and a heat storage method |
| CN102808405A (en) * | 2012-08-21 | 2012-12-05 | 河海大学 | PCC (Large Diameter Pipe Pile by using Cast-in-place Concrete) energy pile and manufacturing method thereof |
| US8821074B2 (en) | 2010-02-25 | 2014-09-02 | Stephen James Reid | Load bearing construction pile |
| CN106595338A (en) * | 2016-12-27 | 2017-04-26 | 滨州市甲力太阳能科技有限公司 | Coil pipe type heat exchanger |
| CN106766364A (en) * | 2016-11-23 | 2017-05-31 | 重庆大学 | A kind of energy pile-Concrete-filled Double Skin Steel Tube Columns geothermal heating system |
| CN107023294A (en) * | 2017-06-06 | 2017-08-08 | 西安科技大学 | Mineral deposit cooperates with recovery method and system with underground heat |
| CN115958690A (en) * | 2023-02-03 | 2023-04-14 | 温州强宏建材有限公司 | Tensioning assembly and pre-tensioning method tubular pile production process |
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2006
- 2006-01-19 CN CNA2006100165442A patent/CN1800510A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100578133C (en) * | 2006-08-28 | 2010-01-06 | 中国科学院电工研究所 | A high-temperature heat storage device using concrete and a heat storage method |
| US8821074B2 (en) | 2010-02-25 | 2014-09-02 | Stephen James Reid | Load bearing construction pile |
| CN102808405A (en) * | 2012-08-21 | 2012-12-05 | 河海大学 | PCC (Large Diameter Pipe Pile by using Cast-in-place Concrete) energy pile and manufacturing method thereof |
| CN102808405B (en) * | 2012-08-21 | 2014-11-19 | 河海大学 | A PCC energy pile and its manufacturing method |
| CN106766364A (en) * | 2016-11-23 | 2017-05-31 | 重庆大学 | A kind of energy pile-Concrete-filled Double Skin Steel Tube Columns geothermal heating system |
| CN106595338A (en) * | 2016-12-27 | 2017-04-26 | 滨州市甲力太阳能科技有限公司 | Coil pipe type heat exchanger |
| CN106595338B (en) * | 2016-12-27 | 2018-10-12 | 滨州市甲力太阳能科技有限公司 | A kind of coil exchanger |
| CN107023294A (en) * | 2017-06-06 | 2017-08-08 | 西安科技大学 | Mineral deposit cooperates with recovery method and system with underground heat |
| CN115958690A (en) * | 2023-02-03 | 2023-04-14 | 温州强宏建材有限公司 | Tensioning assembly and pre-tensioning method tubular pile production process |
| CN115958690B (en) * | 2023-02-03 | 2024-03-29 | 温州强宏建材有限公司 | Tensioning assembly and production process of pretensioned pipe pile |
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