CN108166486A - Deep layer buried tube type prefabrication type energy pile pile and its construction technology - Google Patents
Deep layer buried tube type prefabrication type energy pile pile and its construction technology Download PDFInfo
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- CN108166486A CN108166486A CN201810119817.9A CN201810119817A CN108166486A CN 108166486 A CN108166486 A CN 108166486A CN 201810119817 A CN201810119817 A CN 201810119817A CN 108166486 A CN108166486 A CN 108166486A
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- 238000009417 prefabrication Methods 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000011150 reinforced concrete Substances 0.000 claims description 52
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 230000001681 protective effect Effects 0.000 claims description 16
- 230000002787 reinforcement Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000002775 capsule Substances 0.000 claims 3
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 239000004567 concrete Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
-
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to building pile foundations and field of energy source developing technology, it is related to a kind of deep layer buried tube type prefabrication type energy pile pile for improving geothermal clean energy resource utilization rate and its construction technology, which includes prefabrication type energy pile pile, deep layer drill heat exchange well, heat exchanger tube and backfill material；Prefabrication type energy pile pile and deep layer drill heat exchange well are coaxially disposed from top to bottom；Vertical drilling is both provided with inside prefabrication type energy pile pile and inside deep layer drill heat exchange well along the axial direction of prefabrication type energy pile pile；Heat exchanger tube is integrally U-shaped；Heat exchanger tube stretches to deep layer drill heat exchange bottom at the top of prefabrication type energy pile pile；Backfill material is filled between heat exchanger tube and vertical drilling.The present invention is rational in infrastructure, and construction technology is succinct, can save drilling expense and not influence construction of prefabricated piles, is a kind of novel energy prefabricated pile form efficiently, environmentally friendly.
Description
Technical field
The invention belongs to building pile foundations and field of energy source developing technology, are related to a kind of energy pile pile and construction technology, especially
It is related to a kind of deep layer buried tube type prefabrication type energy pile pile for improving geothermal clean energy resource utilization rate and its construction technology.
Background technology
Since 21 century, China has become global first energy-consuming big country, and China's energy resource structure relies primarily on coal etc.
Fossil fuel, flue dust, the CO of coal burning discharge2Problem of environmental pollution receives the whole world and attractes attention Deng caused by.Earth source heat pump system
System has become a kind of principal mode of clean energy resource, earth source heat pump application by advantages such as energy saving, reduction pollutant emissions
It is the core of underground space energy source use engineering, there is special advantage compared with other air-conditioning systems.To the year two thousand twenty, China
Geothermal heating system or refrigeration area will have reached 1,600,000,000 square metres, altogether alternative 72,100,000 tons of coal of mark, as energy conservation and environmental protection industry
Earth source heat pump industry welcome new dawn.Traditional pipe-buried type ground source heat pump technology is because taking up a large area, and upper space
It is difficult to be utilized, the technology is caused to be difficult to promote and apply in the land supplies such as urban district anxiety plot.Energy pile technology is by building
Heat exchanger tube is buried in pile foundation, realize carrying building upper load and exchanges the dual function of geothermal for.Energy pile, which has, not to be accounted for
With additional area, the advantages that partly drilling expense is saved.Usual pile foundation stake is grown in 20~30m, and earth source heat pump drilling depth
It up to 100m, therefore is difficult in limited stake is long to obtain sufficient heat exchange amount, therefore, buried tube type energy pile is changed in traditional stake
Heat is less.And current energy pile mainly based on bored concrete pile, is consolidated by manually heat exchanger tube is bound on steel reinforcement cage
It is fixed, the pile foundation construction of mechanization is influenced very big, it is difficult to work continuously.
Invention content
In order to solve above-mentioned technical problem present in background technology, the present invention provides a kind of high-efficiency environment friendly, Neng Goujie
The expense that about drills and portion influence the deep layer buried tube type prefabrication type energy pile pile and its construction technology of construction of prefabricated piles.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of deep layer buried tube type prefabrication type energy pile pile, it is characterised in that：The deep layer buried tube type prefabrication type energy pile pile
Including prefabrication type energy pile pile, deep layer drill heat exchange well, heat exchanger tube and backfill material；The prefabrication type energy pile pile and depth
Layer drilling heat exchange well is coaxially disposed from top to bottom；Inside the prefabrication type energy pile pile and deep layer drill heat exchange well inside edge
The axial direction of prefabrication type energy pile pile is both provided with vertical drilling；The heat exchanger tube is integrally U-shaped；The heat exchanger tube is from prefabrication type
Deep layer drill heat exchange bottom is stretched at the top of energy pile pile；The backfill material is filled between heat exchanger tube and vertical drilling.
Preferably, prefabrication type energy pile pile of the present invention includes a section or more piece prefabricated reinforced concrete pipe
Stake；The prefabricated reinforced concrete pile pile is coaxially disposed from top to bottom with deep layer drill heat exchange well；The prefabricated reinforced concrete
When pile pile is more piece, more piece prefabricated reinforced concrete pile pile is sequentially connected from top to bottom.
Preferably, prefabrication type energy pile pile of the present invention further includes and is arranged on top prefabricated reinforced concrete
The stake top heat exchanger tube protective device for being used to protect prefabricated reinforced concrete pile pile and heat exchanger tube at the top of pile pile.
Preferably, stake top heat exchanger tube protective device of the present invention includes pre-formed disk steel member and anchor bolt；
Anchor bolt through-hole and heat exchange pipe through-hole are provided on the pre-formed disk steel member；After the heat exchanger tube passes through heat exchange pipe through-hole
Deep layer drill heat exchange bottom is stretched at the top of prefabrication type energy pile pile；The anchor bolt is by anchor bolt through-hole by pre-formed disk
Steel member is connected with top prefabricated reinforced concrete pile pile.
Preferably, heat exchanger tube of the present invention includes water inlet pipe and the outlet pipe being connected with water inlet pipe；It is described
Water inlet pipe is whole U-shaped after being connected with outlet pipe.
Preferably, heat exchanger tube of the present invention is single U-shaped, double U tandem types or double U parallel connection types.
Preferably, backfill material of the present invention is fine sand or bentonite.
Preferably, deep layer buried tube type prefabrication type energy pile pile of the present invention further includes and is arranged on the prefabrication type energy
Pile pile top and the connection cushion cap steel reinforcement cage being placed in vertical drilling.
A kind of construction technology based on deep layer buried tube type prefabrication type energy pile pile as described above, it is characterised in that：It is described
Construction technology includes the following steps：
1) using sinking apparatus, by prefabricated reinforced concrete pile pile by designing scheme in designated position pile sinking；
2) pile follower depth is calculated according to design requirement, stops pile follower after pile follower to designed elevation；
3) pile crown that is stake top heat exchanger tube protective device is embedded and being fixed on prefabricated reinforced concrete pile pile；
4) drilling machine is set up, from the fixing device lowered inside casing and drilling rod of prefabricated reinforced concrete tubular pile head, downwards
Vertical drilling；When the depth of vertical drilling is not less than 100 meters, drilling rod and casing are extracted；
5) heat exchanger tube is transferred in vertical drilling until heat exchanger tube bottom end arrival vertical drilling bottom, blocks heat exchanger tube top
Exposed redundance simultaneously carries out seal protection；
6) using the gap between backfill material backfill heat exchanger tube and vertical drilling, on the top of prefabricated reinforced concrete pile pile
The reserved deep gouge no more than 1m；
7) the decentralization connection cushion cap steel reinforcement cage in deep gouge, the bottom end of connection cushion cap steel reinforcement cage are inserted back into filler, and top leads to
Cross the stake top that transverse steel is fixed on prefabricated reinforced concrete pile pile；
8) using elbow by the heat exchanger tube welding in horizontal heat exchange tube and vertical drilling, then by horizontal heat exchange tube port sealing
Protection is laid with 5~10cm sand bedding courses in horizontal heat exchange bottom of the tube and is protected.
Preferably, when prefabricated reinforced concrete pile pile is more piece described in step 1) of the present invention, adjacent two
The stake bottom for saving prefabricated reinforced concrete pile pile by ring flange connection method, welding and/or slurry anchor method connect from beginning to end with stake top
Stake；
In the step 2), when stopping pile follower after pile follower to designed elevation, if prefabricated reinforced concrete pile pile leakage length
Degree is more than design value, is more than the part pile pile of absolute altitude using cutting equipment cutting,
It is further included after the step 8)：
9) according to the design requirement of prefabricated reinforced concrete pile pile top structure to being poured at the top of prefabricated reinforced concrete pile pile
Build foundation platform or foundation beam；
10) horizontal heat exchange tube is connected with the condensate correcting-distribuing device of heat-exchange system.
It is an advantage of the invention that：
The present invention provides a kind of deep layer buried tube type prefabrication type energy pile pile and its construction technology, the deep layer buried tube type is prefabricated
Type energy pile pile can solve that buried tube type energy pile heat exchange amount in stake in the prior art is inadequate and traditional earth source heat pump occupies soil
The problem of ground area, improves overall heat exchange amount and heat exchange efficiency.The present invention is drilled using opened type prefabricated tubular pile inner deep
The structure type of pipe laying is symmetric in heat transfer process because heat exchange generates additional temp load, this is that a kind of comparison is good
Stress.Stake top heat exchanger tube protective device of the present invention can not only protect the prefabricated tubular pile after section stake
Shield, and can play the role of protecting heat exchanger tube and horizontal inlet heat exchanger tube in stake.Prefabricated tubular pile lower boreholes variable depth,
The present invention can select different drilling depths to obtain different heat exchange amounts according to user demand.Different from pouring type energy pile
Need to bind heat exchanger tube when transferring steel reinforcement cage in the construction process, the present invention using prefabrication type energy pile pile as bearing structure,
It can greatly save and manually put into and ensure pile quality.The present invention discloses deep layer buried tube type prefabrication type energy pile pile
Construction technology is smaller in face of former pile foundation construction scheme influence in construction party, and saves the drilling expense inside prefabricated tubular pile.
Therefore, the present invention has both the advantages of traditional prefabrication type energy pile and earth source heat pump, is that a kind of environmentally protective and bearer properties are good
Novel energy stake, have broad application prospects.The present invention makes pipe laying by continuing drilling downwards in prefabricated tubular pile bottom
Depth reaches 100m, can effectively improve its heat exchange efficiency and heat exchange amount.Prefabricated pile has rapid construction, and structure type is solid
The advantages that determining considers that buried heat exchanger tube does not influence pile foundation construction in prefabricated tubular pile, and structure type is reasonable, has wide answer
Use prospect.
Description of the drawings
Fig. 1 a are the overall schematic of deep layer buried tube type prefabrication type energy pile pile provided by the present invention；
Fig. 1 b are the cross-sectional view of deep layer buried tube type prefabrication type energy pile pile provided by the present invention；
Fig. 2 is the structure diagram of connection cushion cap steel reinforcement cage of the present invention；
Fig. 3 is the positive structure diagram of stake top heat exchanger tube protective device of the present invention；
Fig. 4 is the overlooking the structure diagram of stake top heat exchanger tube protective device of the present invention；
The reference numerals are as follows：
1- connection cushion cap steel reinforcement cages；2- anchor bolts；3- stake top heat exchanger tube protective devices；4- prefabrication type energy pile piles；5- is prefabricated
Reinforced concrete pipe pile；6- heat exchanger tubes；7- deep layer drill heat exchange wells；8- backfill material.
Specific embodiment
The present invention provides a kind of good novel energy stakes of environmentally protective and bearer properties, efficiently use the prefabrication type energy
The reasonable combination of pile pile and deep layer drill heat exchange well greatly improves the heat exchange amount and heat exchange efficiency of energy pile, has good
Stress performance, has good market prospects and promotional value.
Referring to Fig. 1 a and Fig. 1 b, the present invention provides a kind of deep layer buried tube type prefabrication type energy pile pile, the deep layer pipe layings
Formula prefabrication type energy pile pile includes prefabrication type energy pile pile 4, deep layer drill heat exchange well 7, heat exchanger tube 6 and backfill material 8；It is prefabricated
Type energy pile pile 4 and deep layer drill heat exchange well 7 are coaxially disposed from top to bottom；4 inside of prefabrication type energy pile pile and deep layer are bored
Inside hole heat exchange well 7 vertical drilling is both provided with along the axial direction of prefabrication type energy pile pile 4；Heat exchanger tube 6 is whole U-shaped；Heat exchanger tube
6 stretch to 7 bottom of deep layer drill heat exchange well from the top of prefabrication type energy pile pile 4；Backfill material 8 is filled in heat exchanger tube 6 and is bored with vertical
Between hole.Prefabrication type energy pile pile 4 is more and is arranged on deep layer drill heat exchange well 7 parallel；Contiguous prefabricated type energy pile pile 4
The distance between not less than 4 meters, prevent having interference to neighboring vertical drilling in vertical drilling.
Prefabrication type energy pile pile 4 includes a section or more piece prefabricated reinforced concrete pile pile 5；Prefabricated reinforced concrete pile pile 5
It is coaxially disposed from top to bottom with deep layer drill heat exchange well 7；When prefabricated reinforced concrete pile pile 5 is more piece, more piece is precast reinforced mixed
Solidifying soil pile pile 5 is sequentially connected from top to bottom, and the pile crown of prefabricated reinforced concrete pile pile 5 is opened type.
Prefabrication type energy pile pile 4, which further includes, is arranged on the pre- for protecting of 5 top of top prefabricated reinforced concrete pile pile
The stake top heat exchanger tube protective device 3 of reinforced concrete pipe pile 5 and heat exchanger tube 6 processed.Referring to Fig. 3 and Fig. 4, the present invention is adopted
Stake top heat exchanger tube protective device 3 includes pre-formed disk steel member and anchor bolt 2；Anchor is provided on pre-formed disk steel member
Bolt throughhole and heat exchange pipe through-hole；Pre-formed disk steel member is embedded in prefabrication type energy pile pile 4 by bottom overhanging end and is fixed
And protect pile crown；Heat exchanger tube 6 from the top of prefabrication type energy pile pile 4 stretches to deep layer drill heat exchange well 7 after passing through heat exchange pipe through-hole
Bottom；Pre-formed disk steel member is connected by anchor bolt 2 by anchor bolt through-hole with top prefabricated reinforced concrete pile pile 5.
Heat exchanger tube 6 includes water inlet pipe and the outlet pipe being connected with water inlet pipe；Water inlet pipe is in integrally U after being connected with outlet pipe
Type, heat exchanger tube 6 are single U-shaped, double U tandem types or double U parallel connection types.
Backfill material 8 is fine sand or bentonite.
Fig. 2 is participated in, deep layer buried tube type prefabrication type energy pile pile provided by the present invention, which further includes, is arranged on the prefabrication type energy
4 top of pile pile and the connection cushion cap steel reinforcement cage 1 being placed in vertical drilling.Cushion cap steel reinforcement cage 1 is connected without backing board, the present invention
Backfill backfill 8 closely knit pile pile internal voids of material inside the prefabricated tubular pile provided are provided, core is filled out to obstruct without backing board and mixes
Solidifying soil is exposed to pile pile hollow space.
It is prefabricated to additionally provide a kind of deep layer buried tube type while deep layer buried tube type prefabrication type energy pile pile is provided by the present invention
The construction technology of type energy pile pile, the construction technology include the following steps：
1) using sinking apparatus, by prefabricated reinforced concrete pile pile 5 by designing scheme in designated position pile sinking；It is precast reinforced
When concrete tubular pile 5 is more piece, the stake bottom of two adjacent sections prefabricated reinforced concrete pile pile 5 and stake top by ring flange connection method,
Welding and/or slurry anchor method carry out head and the tail pile extension；
2) pile follower depth is calculated according to design requirement, stops pile follower after pile follower to designed elevation；When pile follower to design mark
When stopping pile follower after height, if prefabricated reinforced concrete pile pile 5 leaks outside, length is more than design value, is more than using cutting equipment cutting
The part pile pile of absolute altitude exposes pile crown；
3) stake top heat exchanger tube protective device 3 is embedded in and is fixed in prefabricated reinforced concrete pile pile using 4 anchor bolts 2
5 pile crown；
4) drilling machine is set up, from the fixing device lowered inside casing and drilling rod of 5 pile crown of prefabricated reinforced concrete pile pile, downwards
Vertical drilling；When the depth of vertical drilling is not less than 100 meters, drilling rod and casing are extracted；
5) heat exchanger tube 6 is transferred in vertical drilling until 6 bottom end of heat exchanger tube arrival vertical drilling bottom, blocks heat exchanger tube 6
The exposed redundance in top simultaneously carries out seal protection；
6) using the gap between 8 backfill heat exchanger tube 6 of backfill material and vertical drilling, in prefabricated reinforced concrete pile pile 5
Reserve the deep gouge no more than 1m in top；
7) the decentralization connection cushion cap steel reinforcement cage 1 in deep gouge, the bottom end of connection cushion cap steel reinforcement cage 1 is inserted back into filler 8, top
The stake top of prefabricated reinforced concrete pile pile 5 is fixed on by transverse steel；
8) using elbow by 6 welding of heat exchanger tube in horizontal heat exchange tube and vertical drilling, then horizontal heat exchange pipe port is close
Envelope protection is laid with 5~10cm sand bedding courses in horizontal heat exchange bottom of the tube and is protected；
9) according to the design requirement of 5 top structure of prefabricated reinforced concrete pile pile to 5 top of prefabricated reinforced concrete pile pile
Pour foundation platform or foundation beam；
10) horizontal heat exchange tube is connected with the condensate correcting-distribuing device of heat-exchange system.
The structure and its construction technology of the present invention are done further specifically with specific embodiment below in conjunction with the accompanying drawings
It is bright：
Embodiment：
The long 28m of deep layer buried tube type prefabrication type energy pile pile top stake, lower part deep layer drill well depth reach 100m.It selects prefabricated
Pile pile specification：Outer diameter 400mm, wall thickness 95mm, single-unit stake long 10m, concrete strength of pile C80.Corresponding stake top heat exchange protection dress
Put specification：Outer diameter 400mm, internal diameter 200mm, height 60mm are embedded in depth 80mm in stake.Connect cushion cap round bar cage specification：It is main
6, muscleStirrupSpacing 200mm.
Implementation steps are as follows：
1) using static pile press, by prefabricated reinforced concrete pile pile by designing scheme in designated position pile sinking, using weldering
It connects and the stake bottom of 3 section prefabricated reinforced concrete pile piles is subjected to pile extension with stake top.
2) pile follower depth 28m is reached according to design requirement, stops pile follower.By pile pile pile cutting machine by design absolute altitude,
Expose pile crown, clear up the laitance and sundries of pile pile inner wall.
3) stake top heat exchanger tube protective device size and the consistency of prefabricated tubular pile are checked, stake top heat exchanger tube protective device is embedding
Enter pile crown, and pile crown is fixed in using 4 anchor bolts.
4) drilling machine is set up, bit diameter selectes 140mm, deep layer drill well diameter 150mm.The subordinate out of pile crown fixing device
Casing and drilling rod are put, is drilled downward vertically.Extraction drilling rod and casing hole to be drilled after being drilled into 100m depths.
5) type of attachment of heat exchanger tube is double U parallel connection types, prepares 4 according to the unilateral long 110m of heat exchanger tube, by 4 heat exchanger tubes
Bottom end be fused into respectively two it is U-shaped.By connect two U heat exchanges, water-filling in pipe, and the plus-pressure table on gas port, make
With not less than 12Kgf/cm2Pressure pressure testing, it is ensured that pipeline stands intact.Heat exchanger tube is transferred, heat exchanger tube bottom end reaches drilling bottom
Portion blocks the exposed redundance in top and carries out seal protection.
6) it is reserved using backfill material backfill deep layer drill heat exchange well and top prefabricated tubular pile internal pore part, the top of pile pile
1m deep space gaps.
7) decentralization connection cushion cap steel reinforcement cage, steel reinforcement cage bottom end are inserted back into filler, and stake is fixed in top by transverse steel
Top.
8) horizontal direction is imported and exported into heat exchanger tube and heat exchanger tube welding in stake, then the inlet and outlet heat exchanger tube by level using elbow
Port sealing is protected, and then checks again for air-tightness, and be laid with 5~10cm sand bedding courses in horizontal heat exchange bottom of the tube and protected.
9) pile pile top inner wall must be cleaned out, and brush inorganic agent, it is ensured that wadding weft variation and tubular pile body concrete
Globality.Design requirement according to superstructure pours foundation platform or foundation beam, and wadding weft variation is first poured marked as C30
Build wadding weft variation.
10) inlet and outlet heat exchanger tube is connected with the condensate correcting-distribuing device of heat-exchange system.
Claims (10)
1. a kind of deep layer buried tube type prefabrication type energy pile pile, it is characterised in that：The deep layer buried tube type prefabrication type energy pile pile packet
Include prefabrication type energy pile pile（4）, deep layer drill heat exchange well（7）, heat exchanger tube（6）And backfill material（8）；The prefabrication type energy source capsule
Stake（4）And deep layer drill heat exchange well（7）It is coaxially disposed from top to bottom；The prefabrication type energy pile pile（4）Internal and deep layer
Drill heat exchange well（7）Inside is along prefabrication type energy pile pile（4）Axial direction be both provided with vertical drilling；The heat exchanger tube（6）It is whole
It is U-shaped；The heat exchanger tube（6）From prefabrication type energy pile pile（4）Top stretch to deep layer drill heat exchange well（7）Bottom；Described time
Filler（8）It is filled in heat exchanger tube（6）Between vertical drilling.
2. deep layer buried tube type prefabrication type energy pile pile according to claim 1, it is characterised in that：The prefabrication type energy source capsule
Stake（4）Including a section or more piece prefabricated reinforced concrete pile pile（5）；The prefabricated reinforced concrete pile pile（5）With deep layer drill
Heat exchange well（7）It is coaxially disposed from top to bottom；The prefabricated reinforced concrete pile pile（5）When being more piece, the precast reinforced coagulation of more piece
Native pile pile（5）It is sequentially connected from top to bottom.
3. deep layer buried tube type prefabrication type energy pile pile according to claim 2, it is characterised in that：The prefabrication type energy source capsule
Stake（4）It further includes and is arranged on top prefabricated reinforced concrete pile pile（5）Top for protecting prefabricated reinforced concrete pile pile
（5）And heat exchanger tube（6）Stake top heat exchanger tube protective device（3）.
4. deep layer buried tube type prefabrication type energy pile pile according to claim 3, it is characterised in that：The stake top heat exchanger tube is protected
Protection unit（3）Including pre-formed disk steel member and anchor bolt（2）；Be provided on the pre-formed disk steel member anchor bolt through-hole and
Exchange heat pipe through-hole；The heat exchanger tube（6）From prefabrication type energy pile pile after across heat exchange pipe through-hole（4）Top stretch to deep layer drill
Heat exchange well（7）Bottom；The anchor bolt（2）By anchor bolt through-hole by pre-formed disk steel member and top prefabricated reinforced concrete pipe
Stake（5）It is connected.
5. the deep layer buried tube type prefabrication type energy pile pile according to claims 1 or 2 or 3 or 4, it is characterised in that：It is described to change
Heat pipe（6）The outlet pipe being connected including water inlet pipe and with water inlet pipe；The water inlet pipe is whole U-shaped after being connected with outlet pipe.
6. deep layer buried tube type prefabrication type energy pile pile according to claim 5, it is characterised in that：The heat exchanger tube（6）It is
Single U-shaped, double U tandem types or double U parallel connection types.
7. deep layer buried tube type prefabrication type energy pile pile according to claim 6, it is characterised in that：The backfill material（8）It is
Fine sand or bentonite.
8. deep layer buried tube type prefabrication type energy pile pile according to claim 7, it is characterised in that：The deep layer buried tube type is pre-
Type energy pile pile processed, which further includes, is arranged on prefabrication type energy pile pile（4）Top and the connection cushion cap steel reinforcement cage being placed in vertical drilling
（1）.
9. a kind of construction technology based on deep layer buried tube type prefabrication type energy pile pile as claimed in claim 8, it is characterised in that：
The construction technology includes the following steps：
1）Using sinking apparatus, by prefabricated reinforced concrete pile pile（5）By designing scheme in designated position pile sinking；
2）Pile follower depth is calculated according to design requirement, stops pile follower after pile follower to designed elevation；
3）By stake top heat exchanger tube protective device（3）It is embedded in and is fixed on prefabricated reinforced concrete pile pile（5）Pile crown；
4）Drilling machine is set up, from prefabricated reinforced concrete pile pile（5）The fixing device lowered inside casing and drilling rod of pile crown, let droop
Straight drilling；When the depth of vertical drilling is not less than 100 meters, drilling rod and casing are extracted；
5）Heat exchanger tube is transferred in vertical drilling（6）Until heat exchanger tube（6）Bottom end reaches vertical drilling bottom, blocks heat exchanger tube
（6）The exposed redundance in top simultaneously carries out seal protection；
6）Expected using backfill（8）Backfill heat exchanger tube（6）Gap between vertical drilling, in prefabricated reinforced concrete pile pile（5）
Top reserve deep gouge no more than 1m；
7）The decentralization connection cushion cap steel reinforcement cage in deep gouge（1）, connect cushion cap steel reinforcement cage（1）Bottom end be inserted back into filler（8）In, on
Prefabricated reinforced concrete pile pile is fixed on by transverse steel in portion（5）Stake top；
8）Using elbow by the heat exchanger tube in horizontal heat exchange tube and vertical drilling（6）Welding, then by horizontal heat exchange tube port sealing
Protection is laid with 5 ~ 10cm sand bedding courses in horizontal heat exchange bottom of the tube and is protected.
10. construction technology according to claim 9, it is characterised in that：The step 1）Described in prefabricated reinforced concrete
Pile pile（5）When being more piece, two adjacent sections prefabricated reinforced concrete pile pile（5）Stake bottom and stake top pass through ring flange connection method, weldering
Connection and/or slurry anchor method carry out head and the tail pile extension；
The step 2）In, when stopping pile follower after pile follower to designed elevation, if prefabricated reinforced concrete pile pile（5）Protruded length
More than design value, using part pile pile of the cutting equipment cutting more than absolute altitude；
The step 8）It further includes later：
9）According to prefabricated reinforced concrete pile pile（5）The design requirement of top structure is to prefabricated reinforced concrete pile pile（5）Top
Pour foundation platform or foundation beam；
10）Horizontal heat exchange tube is connected with the condensate correcting-distribuing device of heat-exchange system.
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| CN109098173A (en) * | 2018-09-28 | 2018-12-28 | 浙江工业大学 | A kind of prefabricated energy pile concrete tubular pile |
| CN109868703A (en) * | 2019-03-14 | 2019-06-11 | 华中科技大学 | A kind of highway bridge snow-ice melting system equipment based on deep layer pipe laying energy pile |
| CN110373970A (en) * | 2019-07-29 | 2019-10-25 | 湖北工业大学 | A kind of overhead road surface underground heat ice-melting structure and its construction method |
| US10774493B2 (en) * | 2018-11-16 | 2020-09-15 | Horst K. Aschenbroich | Hollow rebar for post-grouting the base of reinforced concrete drilled shafts |
| CN111691452A (en) * | 2019-03-14 | 2020-09-22 | 湖北工业大学 | Ground source heat pump integration technology based on building underground structure and construction method thereof |
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