CN105927271A - Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers - Google Patents
Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers Download PDFInfo
- Publication number
- CN105927271A CN105927271A CN201610423491.XA CN201610423491A CN105927271A CN 105927271 A CN105927271 A CN 105927271A CN 201610423491 A CN201610423491 A CN 201610423491A CN 105927271 A CN105927271 A CN 105927271A
- Authority
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- China
- Prior art keywords
- grouting
- vertical
- backfilling
- heat exchanger
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
Abstract
The invention relates to a grouting backfilling system and a grouting backfilling method for vertical shafts in vertical heat exchangers, and belongs to the technical field of drilling devices for simultaneously drilling wells and installing casings. By the aid of the grouting backfilling system and the grouting backfilling method, problems of high cost and easiness in wasting pipes of backfilling modes in the prior art can be solved. The grouting backfilling method includes steps of confirming the types of backfill materials according to underground conditions, characteristics of grouting materials and expected running temperatures of vertical heat exchanger systems; mounting vertical buried pipes and a grouting pipe; carrying out pressure test acceptance inspection on the vertical buried pipes and the grouting pipe; sealing holes by means of grouting backfilling. The grouting backfilling system comprises the vertical buried pipes, the grouting pipe and fixing support clamps. The vertical buried pipes and the grouting pipe are tightly fixed to one another by the aid of the fixing support clamps, water is arranged in cavities of the vertical buried pipes, and ports of the vertical buried pipes are sealed. The grouting backfilling system and the grouting backfilling method have the advantages that irrigation operation is combined with the grouting backfilling system and the grouting backfilling method during backfilling, fractional backfilling compaction effects are realized, accordingly, the grouting backfilling system and the grouting backfilling method are low in backfilling cost, and wastage of pipes can be prevented.
Description
Technical field
The present invention relates to the grouting backfill system and method for vertical shaft in vertical heat exchanger, belong to creeping into of well and enter with setting of casing simultaneously
The drilling rig technical field of row.
Background technology
" heat pump " is a kind of to obtain low grade heat energy from the empty gas and water of nature or soil, does work through electric power, by low
Warm can be converted to high temperature heat, it is provided that can be by the device of the heat energy used by people.Earth source heat pump is to utilize shallow layer geothermal energy to carry out
The new energy technology of heating refrigeration, is the one of heat pump.Soil source heat pump is a kind of form of earth source heat pump, is with the earth for cold
Thermal source carries out air-conditioning technical cool in summer and warm in winter to building.Soil source heat pump also uses the heat storage and cold accumulation ability that underground is huge,
Winter is transferred to heat in building from underground, and summer is that the cold of underground is transferred in building, a year
Degree forms a cold cycling, and soil source heat pump improves the effective rate of utilization of the energy, is a kind of novel renewable energy technologies.
Prior art uses pressurization backfill.Backfill pump uses the column piston pump of import high pressure, position bottom hole inject filler
The most counter fill out, progressively get rid of vertical shaft air, it is ensured that without backfill space, cavity, it is ensured that buried tube heat exchanger fully connects with soil
Touch, it is ensured that heat-transfer effect, but this kind of back-filling way is costly, and easily cause the waste of tubing.
Summary of the invention
It is an object of the invention to the drawbacks described above overcoming existing grouting earth-filling method to exist, it is proposed that perpendicular in a kind of vertically heat exchanger
The grouting backfill system and method for well, combines, during by backfill, operation of pouring water, backfills closely knit several times, backfill low cost and be difficult to
Tubing is caused to waste.
The present invention is to use following technical scheme to realize: the grouting earth-filling method of vertical shaft in a kind of vertical heat exchanger, including such as
Lower step:
Step one: according to the expection running temperature of underground condition and the characteristic of grouting material and vertical heat exchanger system, confirms backfill
The type of material；
Step 2: Vertical pendulum tiltmeters and the installation of grout pipe, including following small step:
The first step: before down tube, carries out pressure testing, rinses and check and accept buried tube heat exchanger；
The two of Vertical pendulum tiltmeters port sealings are processed by second step: after acceptance(check)；
3rd step: after pass the test, is bundled Vertical pendulum tiltmeters and grout pipe by fixed support card, Vertical pendulum tiltmeters
U-tube set up defences protection unit, Vertical pendulum tiltmeters planted agent is full of water；
4th step: Vertical pendulum tiltmeters is inserted in the hole together with grout pipe, until at the bottom of hole；
Step 3: Vertical pendulum tiltmeters and grout pipe are carried out pressure testing examination；
Step 4: after acceptance(check), grouting backfill sealing of hole: calculate the mixing slurry amount that each hole needs before grouting, and must ensure
Once grouting is complete.
Further, grouting backfill material uses the mixing slurry of bentonite, fine sand and cement or special grouting material, it is preferable that swollen
Profit soil: fine sand: cement=1:5:4.
Further, in step 4, according to the speed of grouting pump, grout pipe should gradually be extracted out during grouting, make grouting backfill material certainly
Lower and upper perfusion sealing of hole, it is ensured that well cementing is closely knit, without cavity.
Further, in step 4, Vertical pendulum tiltmeters in pore and grout pipe should wait 3-4h after burying underground, treat mud in pore
Backfill with coarse sand after precipitation, it is necessary to the space between pipe and pore is tamped, it is ensured that heat transfer effect.
Further, in step 4, the inspection of backfilling process and the installation of ground heat exchanger must synchronize be carried out.
The grouting backfill system of vertical shaft in a kind of vertical heat exchanger, including Vertical pendulum tiltmeters, grout pipe and fixed support card, vertically
Together with underground pipe and grout pipe are fastened by fixed support clamping, Vertical pendulum tiltmeters includes water inlet pipe, outlet pipe and U-tube,
The bottom of water inlet pipe and outlet pipe connects U-tube, is provided with water and Vertical pendulum tiltmeters port sealing in the cavity of Vertical pendulum tiltmeters
Arrange.
Further, fixed support card is uniformly arranged on Vertical pendulum tiltmeters and grout pipe, and fixed support card is at least provided with two.
Further, fixed support card is provided with one every 2-4m.
Further, the pretightning force of fixed support card ensure that Vertical pendulum tiltmeters is indeformable and in grout pipe filling process easily.
Further, grout pipe is between the water inlet pipe and outlet pipe of Vertical pendulum tiltmeters, and the lower end of grout pipe is positioned on U-tube
Side.
The invention has the beneficial effects as follows: the grouting backfill system and method for vertical shaft in vertical heat exchanger of the present invention, by returning
Combine operation of pouring water when filling out, backfill closely knit several times, backfill low cost and do not easily cause tubing waste.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the present invention.
Fig. 2 is the structural representation of the grouting backfill system of the present invention.
In figure: 1 water inlet pipe；2 outlet pipes；3U shape pipe；4 fixed support cards；5 backfill material；6 ports；7 grout pipes.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As in figure 2 it is shown, the grouting backfill system of vertical shaft in a kind of vertical heat exchanger, including Vertical pendulum tiltmeters, grout pipe 7 and solid
Together with fixed rack card 4, Vertical pendulum tiltmeters and grout pipe 7 are tightly secured in by fixed support card 4, Vertical pendulum tiltmeters include into
Water pipe 1, outlet pipe 2 and U-tube 3, the bottom of water inlet pipe 1 and outlet pipe 2 connects U-tube 3, the chamber of Vertical pendulum tiltmeters
Internal water and the Vertical pendulum tiltmeters port 6 of being provided with seals and arranges；Fixed support card 4 is uniformly arranged on Vertical pendulum tiltmeters and grout pipe
On 7, fixed support card 4 is at least provided with two, and fixed support card 4 is provided with one every 2-4m；Fixed support card 4
Pretightning force ensure that Vertical pendulum tiltmeters is indeformable and in grout pipe 7 filling process easily；Grout pipe 7 is positioned at the water inlet of Vertical pendulum tiltmeters
Between pipe 1 and outlet pipe 2, the lower end of grout pipe 7 is positioned at above U-tube 3.
The present invention uses the method for machinery down tube.Before down tube, reply group carries out pressure testing, flushing to good buried tube heat exchanger, then
3 two ports 6 of U-tube are sealed, prevents foreign material from entering.After pressure test is qualified, grout pipe 7 is bundled with U-tube 3
Together.Binding knot answers density moderate, should ensure that 3 pipes are the most curved, can not bundle again tension, increase grout pipe 7 and fill
The difficulty promoted during slurry；U-tube 3 head is set up defences protection unit, to prevent the damage during down tube；U-tube 3 planted agent
It is full of water, increases deadweight, reduce the buoyancy during down tube.When boring is good and after hole wall solidification, should down tube immediately.Bore
It is unsuitable long that the time is shelved in good hole, pore local stoppages the most likely occurs, causes down tube difficulty.Down tube speed is wanted slowly
Uniformly, support, scratch tubing are damaged during preventing down tube invention.If meeting obstacle or the phenomenon that has some setbacks, suspend down tube,
Down tube could be continued after ascertaining the reason and performing process.
Must assure that when transferring U-tube 3 that pipeline will not distort, deform.During down tube, should be by grout pipe 7 together with U-tube 3
Insert aerial, until at the bottom of hole.The length of U-tube 3 should be more slightly longer than hole depth, allows it to the 500mm that bassets, in order to follow-up
Construction.During down tube, it is full of water in U-tube, and sets pipe clamp every 2-4m, by 3 liang of arms of U-tube separately, it is to avoid be each
Heat disturbance between arm, after U-tube 3 installs, the sealing of hole of grouting backfill immediately, isolate water-bearing layer.Arrive under heat exchange pipeline
After Wei, down tube drilling rod should be mentioned.Should prevent U-tube 3 from floating during promotion, make it solid as found that floating takes immediate steps
Fixed, it is ensured that down tube puts in place.After vertical ground heat exchanger U-tube 3 installs, in time pipeline should be carried out pressure testing examination,
The sealing of hole of grouting backfill immediately after qualified.As find during pressure testing can not voltage stabilizing, it is necessary in time examination is imbedded in pipeline pull-out again
The pipeline of pressing lattice, and analyze the reason of accident, rectification and reform is proposed.Can sealing of hole after confirming U-tube 3 ne-leakage.
Vertical ground heat exchanger grouting backfill material 5 preferably uses the mixing slurry of bentonite and fine sand (or cement) or special grouting material.
When ground heat exchanger is located in closely knit or hard Rock And Soil, preferably use the grouting backfill of cement base-material.Get out when the bores are being drilled
Cement mortar solidification after-contraction is little, can be as backfilling material.Flatly buried tube heat exchanger backfill material 5 should be tiny, loose, equal
Even, and should not contain stone and soil block.During the grouting of invention vertical shaft, backfill material 5 and proportioning should meet design requirement.
After completing 1 pore-forming, when carrying out next hole drilling, allow circulating mud in the pore-forming of a upper down tube,
Sediment in mud circulation can be deposited in a pore-forming, and top layer can not be filled up part and use backfill material 5 to tamp.During backfill
In conjunction with operation of pouring water, backfilling closely knit several times, this kind of back-filling way is the most conventional.
As it is shown in figure 1, grouting construction require and step: to grouting selection depend on underground condition and grouting material characteristic and
The expection running temperature of ground heat exchanger.Perfusion suitably grouting can strengthen the thermo-contact between soil and heat exchanger, prevents
Pollutant faces down from ground seepage, prevents the movement between each water layer in underground.Vertical ground heat exchanger U-tube 3 installs
After, should be in the milk backfill sealing of hole immediately.Backfilling material selects the mixing slurry of bentonite and fine sand or cement, bentonite: fine sand: water
Mud=1:5:4, calculates the mixing slurry amount that each well needs, and must ensure that once grouting is complete before grouting.Should be according to filling during grouting
Grout pipe 7 is gradually extracted out by the speed of stock pump, and grout pipe 7 is identical with water pipe material, the whole middle non junction of grout pipe 7, makes
Grouting irrigates sealing of hole from bottom to top, it is ensured that well cementing is closely knit, without cavity.During backfill material 5 grouting, it is desirable to high pressure backfill guarantees
Without backfill space, after backfill material 5 solidification, should have the good capacity of heat transmission.Pressurize must be carried out at grouting backfill pipeline, once send out
Existing appearance of abnormal pressure, stops immediately, can continue backfill after ascertaining the reason and processing.PE pipe in pore should after having buried
Wait 3-4h, backfill with coarse sand after mud sediment in well, it is necessary to the space between pipe and pore is tamped, it is ensured that heat transfer effect.
Should repeatedly check after completing for the first time.Time after the cement mortar solidification taken out during boring as shunk the least, it is possible to as grouting material.
If after boring region is the most closely knit under frozen soil layer when hard soil or rock, cement base-material should be used to be in the milk.When pipe laying is deep
When degree is more than 40m, grouting backfill is carried out after should closing on the equal Drilling of boring around.The pipeline on ground is will be left in after having backfilled
The mouth of pipe carries out closure protection, prevents subsequent construction from causing damage.The inspection of backfilling process must be same with the installation of ground heat exchanger
Step is carried out.
Certainly, foregoing is only presently preferred embodiments of the present invention, it is impossible to be considered for limiting embodiments of the invention scope.
The present invention is also not limited to the example above, and those skilled in the art are made in the essential scope of the present invention
Impartial change and improvement etc., all should belong in the patent covering scope of the present invention.
Claims (10)
1. the grouting earth-filling method of vertical shaft in a vertical heat exchanger, it is characterised in that: comprise the steps:
Step one: according to the expection running temperature of underground condition and the characteristic of grouting material and vertical heat exchanger system, confirms backfill
The type of material (5)；
Step 2: Vertical pendulum tiltmeters and the installation of grout pipe (7), including following small step:
The first step: before down tube, carries out pressure testing, rinses and check and accept buried tube heat exchanger；
Second step: after acceptance(check), by the two of Vertical pendulum tiltmeters port (6) encapsulation process；
3rd step: after pass the test, is bundled Vertical pendulum tiltmeters and grout pipe (7) by fixed support card (4),
The U-tube (3) of Vertical pendulum tiltmeters is set up defences protection unit, and Vertical pendulum tiltmeters planted agent is full of water；
4th step: Vertical pendulum tiltmeters is inserted in the hole together with grout pipe (7), until at the bottom of hole；
Step 3: Vertical pendulum tiltmeters and grout pipe (7) are carried out pressure testing examination；
Step 4: after acceptance(check), grouting backfill sealing of hole: calculate the mixing slurry amount that each hole needs before grouting, and must ensure
Once grouting is complete.
The grouting earth-filling method of vertical shaft in vertical heat exchanger the most according to claim 1, it is characterised in that: grouting backfill material
(5) the mixing slurry of bentonite, fine sand and cement or special grouting material are used, it is preferable that bentonite: fine sand: cement=1:5:4.
The grouting earth-filling method of vertical shaft in vertical heat exchanger the most according to claim 2, it is characterised in that: in step 4,
According to the speed of grouting pump, grout pipe (7) should gradually be extracted out during grouting, make grouting backfill material (5) irrigate sealing of hole from bottom to top,
Guarantee that well cementing is closely knit, without cavity.
The grouting earth-filling method of vertical shaft in vertical heat exchanger the most according to claim 1, it is characterised in that: in step 4,
Vertical pendulum tiltmeters in pore and grout pipe (7) should wait 3-4h after burying underground, backfill with coarse sand after mud sediment in pore,
Space between pipe and pore must be tamped, it is ensured that heat transfer effect.
The grouting earth-filling method of vertical shaft in vertical heat exchanger the most according to claim 1, it is characterised in that: in step 4,
The inspection of backfilling process and the installation of ground heat exchanger must synchronize be carried out.
6. use in claim 1-5 a system for the grouting earth-filling method of vertical shaft in the vertical heat exchanger described in any one,
It is characterized in that: include Vertical pendulum tiltmeters, grout pipe (7) and fixed support card (4), Vertical pendulum tiltmeters and grout pipe (7)
Being tightly secured in together by fixed support card (4), Vertical pendulum tiltmeters includes water inlet pipe (1), outlet pipe (2) and U-tube
(3), the bottom of water inlet pipe (1) and outlet pipe (2) connects U-tube (3), is provided with water in the cavity of Vertical pendulum tiltmeters
And Vertical pendulum tiltmeters port (6) seals and arranges.
The grouting backfill system of vertical shaft in vertical heat exchanger the most according to claim 6, it is characterised in that: fixed support card
(4) being uniformly arranged on Vertical pendulum tiltmeters and grout pipe (7), fixed support card (4) is at least provided with two.
The grouting backfill system of vertical shaft in vertical heat exchanger the most according to claim 7, it is characterised in that: fixed support card
(4) 2-4m is provided with one.
9. according to the grouting backfill system of vertical shaft in the vertical heat exchanger described in claim 7 or 8, it is characterised in that: fixing
The pretightning force of frame card (4) ensure that Vertical pendulum tiltmeters is indeformable and in grout pipe (7) filling process easily.
The grouting backfill system of vertical shaft in vertical heat exchanger the most according to claim 6, it is characterised in that: grout pipe (7)
Being positioned between the water inlet pipe (1) of Vertical pendulum tiltmeters and outlet pipe (2), the lower end of grout pipe (7) is positioned on U-tube (3)
Side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610423491.XA CN105927271A (en) | 2016-06-15 | 2016-06-15 | Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610423491.XA CN105927271A (en) | 2016-06-15 | 2016-06-15 | Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers |
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| Publication Number | Publication Date |
|---|---|
| CN105927271A true CN105927271A (en) | 2016-09-07 |
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ID=56830067
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| CN201610423491.XA Pending CN105927271A (en) | 2016-06-15 | 2016-06-15 | Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060676A (en) * | 2017-12-15 | 2018-05-22 | 大连中盈能源管理有限公司 | A kind of ground-source heat pump ground source well backfilling material and earth-filling method |
| CN108104138A (en) * | 2017-12-15 | 2018-06-01 | 大连中盈能源管理有限公司 | A kind of ground source well backfill system and earth-filling method |
| CN109357423A (en) * | 2018-08-07 | 2019-02-19 | 中铁上海工程局集团有限公司 | A kind of double-U-shaped half immersed tube closed-loop ground source heat pump air-conditioning system construction method |
| CN114279096A (en) * | 2021-12-27 | 2022-04-05 | 沈阳枫叶能源科技有限公司 | Underground conveying device for heat supply of ground rock and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060676A (en) * | 2017-12-15 | 2018-05-22 | 大连中盈能源管理有限公司 | A kind of ground-source heat pump ground source well backfilling material and earth-filling method |
| CN108104138A (en) * | 2017-12-15 | 2018-06-01 | 大连中盈能源管理有限公司 | A kind of ground source well backfill system and earth-filling method |
| CN109357423A (en) * | 2018-08-07 | 2019-02-19 | 中铁上海工程局集团有限公司 | A kind of double-U-shaped half immersed tube closed-loop ground source heat pump air-conditioning system construction method |
| CN109357423B (en) * | 2018-08-07 | 2022-02-25 | 中铁上海工程局集团有限公司 | Construction method of double-U-shaped semi-immersed tube ground source heat pump air conditioning system |
| CN114279096A (en) * | 2021-12-27 | 2022-04-05 | 沈阳枫叶能源科技有限公司 | Underground conveying device for heat supply of ground rock and construction method thereof |
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