CN109750670A - A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology - Google Patents
A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology Download PDFInfo
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- CN109750670A CN109750670A CN201711120465.0A CN201711120465A CN109750670A CN 109750670 A CN109750670 A CN 109750670A CN 201711120465 A CN201711120465 A CN 201711120465A CN 109750670 A CN109750670 A CN 109750670A
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- valve tube
- sand
- foundation pit
- rich water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 title abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 57
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 238000007569 slipcasting Methods 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 230000010412 perfusion Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000011449 brick Substances 0.000 claims 1
- 239000003599 detergent Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 239000011440 grout Substances 0.000 description 5
- 229920002472 Starch Polymers 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011257 shell material Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Abstract
The invention discloses a kind of rich water boulder bed Deep Foundation Pit bottom reinforcing mini-valve tube and construction technologies to prevent bottom heave, increase base pit stability to reinforce in rich water pebble layer to Deep Foundation Pit bottom.It is characterized in that, mini-valve tube includes mini-valve tube (1), Grouting Pipe (2), injection slurry (7), artificial back-up sand filled layer (6), drain bar (5), stop grouting plug (3), connector (8), rubber raft (4), taper plug (9).And its construction technology: drilling machine is in place after line setting and drills, and prepares sand, and installation mini-valve tube performs artificial back-up sand filled layer, segmenting slip casting and sealing of hole.The present invention utilizes the fixed mini-valve tube of artificial back-up sand, river sand in artificial back-up sand filled layer can rush in pebble layer by high-strength grouting pressure and injection slurry, it effectively fills after being mixed with injection slurry to the gap of pebble layer, change the gradation of pebble layer, reach better slip casting effect, and low manufacture cost, high financial profit.
Description
Technical field
The present invention relates to engineering field, in particular to a kind of rich water boulder bed Deep Foundation Pit bottom reinforcing mini-valve tube and its apply
Work technique is for a kind of rich water pebble layer improved new technology on the basis of conventional slurry injection technique of sleeve valve tube.
Background technique
In buried depth up to 20 meters and during underground subway construction below, waterproof is constructed emphasis as station tunnel, is adopted
Slip casting is taken to carry out foundation ditch strengthening as a kind of preferable selection.But rich waters round gravel cobble layer is rich in Chongqing, Chengdu, Guangxi, Hunan etc.
There is serious problem in rich area, grouting and reinforcing process.Since gravel layer and boulder bed often have loosely organized, gap
Rate is big, high osmosis characteristic, tends to occur slurries to the reinforcing of rich water round gravel cobble layer using traditional mini-valve tube technology slip casting and expands
Dissipate it is big, be lost it is serious, effectively filling can not be formed, the problems such as grout leaking card pipe phenomenon easily occur.And it is directed to rich water round gravel cobble layer
Area mini-valve tube technology abundant is blank at home.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of rich water boulder bed Deep Foundation Pit bottom reinforcing mini-valve tube
And construction technology, the mini-valve tube be for pebble layer it is improved, structure is simple, and easy for construction, consolidation effect is good.It can be realized
The slip casting structure of the good consolidation effect of rich water round gravel cobble layer fills up the sky of the abundant regional mini-valve tube technology of rich water round gravel cobble layer
It is white.
The technical solution adopted by the present invention to solve the technical problems is: a kind of rich water boulder bed Deep Foundation Pit bottom reinforcing use
Mini-valve tube.It is characterized in that, it includes mini-valve tube and artificial back-up sand filled layer.Taper plug is arranged in mini-valve tube end, and inside is set
It is equipped with Grouting Pipe and drain bar.Stop grouting plug and connector are provided in Grouting Pipe.Connector and stop grouting plug contact-segment in Grouting Pipe
Rubber cup is only starched in setting.It is injection slurry in Grouting Pipe.
Wherein, mini-valve tube is the waterglass round tube with spiral pattern, and spiral pattern can increase mini-valve tube and fill out with artificial back-up sand
The frictional force of layer is filled, the stability during sleeve valve barrel grouting is increased.Waterglass material replaces the steel or pvc material of traditional mini-valve tube
Matter can increase the rigidity and durability of mini-valve tube, avoid in use process due to the too long insufficient rigidity of pipe and disconnected pipe broken pipe shows
As occurring, and the erosion special efficacy of water can be effectively resisted using waterglass, increase the service life of mini-valve tube.And waterglass is due to tool
The standby transparent property of color, the sundries that can be directly observed in pipe help to realize the rapid cleaning in pipe, effectively solve tradition
The difficult problem of mini-valve tube cleaning.
Specifically, the diameter of waterglass round tube is 68mm-88mm, wall thickness 3mm-5mm.
Specifically, the connector and stop grouting plug contact-segment setting 5-6 in Grouting Pipe only starch rubber cup, to form plasma resistance
Plug, plays the role of only slurry.
Specifically, 4 rubber rafts on mini-valve tube surface, are washed open by slurries under pressure, slurries are made to enter stratum,
And it can guarantee and distinguish level as required, form splitting, and when stopping grouting, rubber raft rebounds again and wraps mini-valve tube, prevents
Only extratubal fluid enters in pipe, plays the role of reverse stop valve.
More specifically, two draining board diameters in mini-valve tube are 0.5m-1.0m, exclude partial moisture in slurries, effectively
Prevent grout leaking.
Detailed, the injection slurry in Grouting Pipe is ordinary portland cement.Strength grade be 42.5,42.5R, 52.5 or
52.5R, ratio of mud 0.55-0.65.
In more detail, the slip casting liquid grout pressure in Grouting Pipe is 0.9-2.1Mpa.
Further, the raw material that artificial back-up sand filled layer is arranged in are river sand.
Further, artificial back-up sand filled layer hole diameter is 88mm-108mm.
Further, artificial back-up sand filled layer uses the medium-fine sand of fineness modulus Mx=3-1.6.Wherein fineness mould
Number accounts for the 60%-70% of artificial back-up sand filled layer gross mass in the fine sand of Mx=2.2-1.6.Fineness modulus is Mx=3.0-2.3
Middle sand account for the 30%-40% of artificial back-up sand filled layer gross mass.Fixed medium-fine sand mini-valve tube is as filled layer as slurries rush
Into pebble layer gap, gap is filled, changes stratum gradation, effectively can quickly reduce boulder bed gap, reduce the flowing of slurries
Property, to effectively reduce slurries loss.
The present invention has the advantages that are as follows:
(1) mini-valve tube of a rich water boulder bed Deep Foundation Pit bottom reinforcing is provided, the blank of the technology is filled up.Some
Rich water round gravel cobble layer area abundant tends to occur that slurries diffusion is big, it is serious to be lost, can not form the problems such as effective filling.And
Traditional mini-valve tube technology can not solve the above problems, the original traditional mini-valve tube of the invention transformation, with can reinforcing rich water boulder bed
Layer.
(2) improve boulder bed gradation.Particle of the diameter greater than 20mm is more than the 50% of gross mass in boulder bed, diameter it is big and
The heavy particle of quality accounts for leading, sufficiently proves that the voidage in boulder bed is big.And manually back-up sand is filled for present invention selection
Layer replacement sleeve shell material, artificial back-up sand can be mixed with the injection slurry in Grouting Pipe, be injected in the boulder bed of underground together, supplement boulder bed
In gap, improve the gradation of boulder bed, to reach better consolidation effect.
(3) reduce slurries to be lost.In traditional sleeve valve barrel grouting engineering method, slurries rack sleeve shell material slip casting and enter stratum,
Since gap is larger between boulder bed particle, and underground bearing water mobility is big, causes slurry infiltration big, slurries is caused to be lost.
The present invention is mixed with injection slurry by artificial back-up sand and is padded in boulder bed, and boulder bed gap effectively can be quickly reduced, and reduces slurry
The mobility of liquid increases to effectively reduce slurries loss.
(4) cost is reduced.The present invention substitutes cement grout using cheap artificial back-up sand filled layer, directly reduce price compared with
The dosage of high cement grout reduces the cost of injecting paste material indirectly.
Detailed description of the invention
Fig. 1 is mini-valve tube reconstruction structure schematic diagram of the present invention；
Fig. 2 is mini-valve tube reconstruction structure schematic diagram of the present invention；
Fig. 3 is mini-valve tube reconstruction structure sectional view 1-1 of the present invention.
Each label indicates in figure are as follows: 1- mini-valve tube, 2- Grouting Pipe, 3- stop grouting plug, 4- rubber raft, 5- drain bar, 6- are artificial
Back-up sand filled layer, 7- injection slurry, 8- connector, 9- taper plug.
Specific embodiment
The embodiment of the present invention: it includes mini-valve tube (1) and artificial back-up sand filled layer (6).The setting of mini-valve tube (1) end
Taper plug (9) is internally provided with Grouting Pipe (2) and drain bar (5).It is provided with stop grouting plug (3) on Grouting Pipe (2) and connects
Head (8).Connector (8) and the setting of stop grouting plug (3) contact-segment in Grouting Pipe (2) only starch rubber cup.It is note in Grouting Pipe (2)
Slurries (7).
Mini-valve tube (1) is the waterglass round tube with spiral pattern.
Waterglass round tube diameter is 68mm-88mm, wall thickness 3mm-5mm.
Connector (8) and stop grouting plug (3) contact-segment setting 5-6 in Grouting Pipe only starch rubber cup.
There are 4 rubber rafts on mini-valve tube (1) surface.
Two drain bar (5) diameters in mini-valve tube (1) are 0.5m-1.0m.
Injection slurry (7) in Grouting Pipe (2) is ordinary portland cement.Strength grade be 42.5,42.5R, 52.5 or
52.5R.The ratio of mud is 0.55-0.65.
Injection slurry (7) slip casting pressure in Grouting Pipe (2) is 0.9Mpa-2.1Mpa.
Be arranged artificial back-up sand filled layer (6) raw material be river sand.
The hole diameter of artificial back-up sand filled layer (6) is 88mm-108mm.
Artificial back-up sand filled layer (6) uses the medium-fine sand of fineness modulus Mx=3-1.6.Wherein fineness modulus is in Mx=
The fine sand of 2.2-1.6 accounts for the 60%-70% of artificial back-up sand filled layer gross mass.Fineness modulus is that the middle sand of Mx=3.0-2.3 accounts for
The 30%-40% of artificial back-up sand filled layer gross mass.
Two stop grouting plugs (3) up and down are arranged in mini-valve tube (1).
A kind of rich water boulder bed Deep Foundation Pit bottom reinforcing mini-valve tube construction technology are as follows: unwrapping wire positioning → drilling machine is in place and bores
Performing artificial back-up sand outside mini-valve tube fills in hole → mini-valve tube for being equipped with Grouting Pipe and drain bar is inserted into drilling and centering →
Layer → segmenting slip casting → supplement sand → sealing of hole mouth.When construction, unwrapping wire positioning goes out slip casting using construction baseline and auxiliary base, measuring
The hole location in hole makes visible marking with bamboo stake etc..When drilling, drilling machine bottom should be made smooth firm, bored before spudding in using sash weight
Head and the verticality of drilling are detected, it is desirable that gradient≤0.9% of drilling.During drilling, due to road to be penetrated
Face or concrete block generally use diamond bit.When mini-valve tube is inserted into drilling, it is to be ensured that arrive bottom hole under mini-valve tube.Again to pipe
Middle injected clear water reduces the curvature of mini-valve tube.Mini-valve tube uses the waterglass round tube of spiral pattern, increases mini-valve tube and artificial
The frictional force of back-up sand filled layer enhances the stability during sleeve valve barrel grouting.Two drain bars are set in mini-valve tube, and are symmetrically set
It sets, partial moisture in slurries is discharged.Performing artificial back-up sand filled layer is to replace traditional mini-valve tube outer shell material using manually filling out
Mini-valve tube is filled outside and forms filled layer by sand, and filled layer uses fineness modulus in the river sand of Mx=3.0-1.6.Mortar depositing construction
When, in Grouting Pipe tripping in slip casting pore, it is to be ensured that arrive bottom hole under Grouting Pipe, 10-20cm above ground level is wanted on top, using filling water
Grouting Pipe gravity, float Grouting Pipe will not.By Grouting Pipe down toward the hole section for needing slip casting, start grouting pump, pressure
Injection slurry is sent, pressure steps up in the process, until washing rubber sleeve valve open.According to design requirement, Grouting Pipe is moved up and down,
Slip casting in each position gradually open loop slip casting for needing slip casting, until completing all hole sections.During slip casting, while slip casting
Artificial back-up sand is circulated into artificial back-up sand filled layer, the mode that marginal not slurry side fills sand is formed, so that sand is filled to cobble
Layer gap.It can be the normal silicate of the 42.5 of 0.55-0.65,42.5R, 52.5 or 52.5R that pulping material, which uses the ratio of mud,
Cement, under defined maximum grouting pressure (2.1Mpa), injection rate continues perfusion 30 minutes or so after being not more than 0.5L/min
After terminate slip casting.It after mud jacking slip casting, by orifice closing and is protected using boring cover, to reuse.
Claims (12)
1. a kind of rich water boulder bed Deep Foundation Pit bottom, which reinforces, uses mini-valve tube, it is characterised in that the mini-valve tube includes: mini-valve tube sleeve
Valve pipe (1), Grouting Pipe (2), injection slurry (7), artificial back-up sand filled layer (6), drain bar (5), stop grouting plug (3), connector (8), rubber
Skin raft (4), taper plug (9).
2. a kind of rich water boulder bed Deep Foundation Pit bottom as described in claim 1, which reinforces, uses mini-valve tube, it is characterised in that the sleeve
Valve pipe (1) is the round tube with spiral pattern, and making material is waterglass.
3. a kind of rich water boulder bed Deep Foundation Pit bottom as described in claim 1, which reinforces, uses mini-valve tube, which is characterized in that the water
Glass round tube diameter is 68-88mm, wall thickness 3mm-5mm.
4. a kind of rich water boulder bed Deep Foundation Pit bottom as described in claim 1, which reinforces, uses mini-valve tube, which is characterized in that the note
A only slurry rubber cup of connector (8) and stop grouting plug (3) contact-segment setting 5-6 on slurry pipe (2).
5. a kind of rich water boulder bed Deep Foundation Pit bottom as described in claim 1, which reinforces, uses mini-valve tube, which is characterized in that the sleeve
There are four rubber rafts on valve pipe (1) surface.
6. a kind of rich water boulder bed Deep Foundation Pit bottom as described in claim 1, which reinforces, uses mini-valve tube, which is characterized in that the sleeve
Having two diameters in valve pipe is the drain bar (5) of 0.5m-1m.
7. a kind of rich water boulder bed Deep Foundation Pit bottom as described in claim 1 reinforces as follows with mini-valve tube and construction technology:
(1) when constructing, unwrapping wire positioning goes out the hole location of injected hole using construction baseline and auxiliary base, measuring, is made with bamboo stake etc.
Visible marking.
(2) diamond bit brick machine is utilized, in mark vertical drilling.
(3) sieve extemporaneous preparation sand is utilized.
(4) mini-valve tube is inserted perpendicularly into drilling, and guarantees that the center of mini-valve tube is overlapped with drill center as far as possible.Again to being injected in pipe
Clear water sets Grouting Pipe and two drain bars in pipe.
(5) in Grouting Pipe tripping in slip casting pore, bottom hole will be arrived under Grouting Pipe, top keeps 10-20cm above ground level, in Grouting Pipe
Interior water filling, until Grouting Pipe will not float.Filled layer is formed by sand is filled outside mini-valve tube, until filling up between mini-valve tube and hole
Gap.
(6) Grouting Pipe being started into grouting pump down toward the hole section for needing slip casting, force feed injection slurry steps up grouting pressure, until
Wash rubber sleeve valve open.According to design requirement, Grouting Pipe is moved up and down, in each position gradually open loop slip casting for needing slip casting, until
Complete the slip casting of all hole sections.
(7) artificial back-up sand is circulated into artificial back-up sand filled layer while slip casting, forms the mode that marginal not slurry side fills sand, so as to
Sand is filled to pebble layer gap.Continue to terminate perfusion, detergent line and mini-valve tube after 30min is perfused, removes Grouting Pipe, into
The slip casting in the next hole of row.
(8) it after mud jacking slip casting, by orifice closing and is protected using boring cover, to reuse.
8. a kind of rich water boulder bed Deep Foundation Pit bottom as claimed in claim 7, which reinforces, uses mini-valve tube, which is characterized in that the note
Injection slurry (7) in slurry pipe (2) is ordinary portland cement, strength grade 42.5,42.5R, 52.5 or 52.5R, the ratio of mud
For 0.55-0.65.
9. a kind of rich water boulder bed Deep Foundation Pit bottom as claimed in claim 7, which reinforces, uses mini-valve tube, which is characterized in that the note
The slip casting pressure of slurries (7) is 0.9~2.1Mpa.
10. a kind of rich water boulder bed Deep Foundation Pit bottom as claimed in claim 7, which reinforces, uses mini-valve tube, which is characterized in that described
Thin river sand filling in artificial back-up sand filled layer (6) use.
11. a kind of rich water boulder bed Deep Foundation Pit bottom as claimed in claim 7, which reinforces, uses mini-valve tube, which is characterized in that described
Artificial back-up sand filled layer (6) hole diameter is 88-108mm.
12. a kind of rich water boulder bed Deep Foundation Pit bottom as claimed in claim 7, which reinforces, uses mini-valve tube, which is characterized in that described
Medium-fine sand is the sand of fineness modulus Mx=3-1.6, and fineness modulus is that Mx=2.2-1.6 accounts for artificial back-up sand filled layer gross mass
60%-70%.Fineness modulus is the 30%-40% that Mx=3.0-2.3 accounts for artificial back-up sand filled layer gross mass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711120465.0A CN109750670A (en) | 2017-11-04 | 2017-11-04 | A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711120465.0A CN109750670A (en) | 2017-11-04 | 2017-11-04 | A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology |
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| CN109750670A true CN109750670A (en) | 2019-05-14 |
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ID=66402366
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711120465.0A Pending CN109750670A (en) | 2017-11-04 | 2017-11-04 | A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136866A (en) * | 2021-03-24 | 2021-07-20 | 中国建筑第八工程局有限公司 | Grouting reinforcement construction method for sleeve valve pipe of soil loose water-rich stratum |
| CN113153318A (en) * | 2021-05-25 | 2021-07-23 | 重庆大学 | Earth-rock mixture stratum grouting reinforcement device and grouting reinforcement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644048A (en) * | 2009-06-03 | 2010-02-10 | 广东省航盛建设集团有限公司 | Slurry injection technique of sleeve valve tube of cloth bag |
| CN102444118A (en) * | 2010-10-15 | 2012-05-09 | 中铁五局（集团）有限公司 | Construction method for grouting reinforcement of sleeve valve pipe |
| CN102505684A (en) * | 2011-11-02 | 2012-06-20 | 河海大学 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
| CN103628912A (en) * | 2013-11-04 | 2014-03-12 | 葛洲坝集团基础工程有限公司 | Goaf management filling grouting construction method |
-
2017
- 2017-11-04 CN CN201711120465.0A patent/CN109750670A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644048A (en) * | 2009-06-03 | 2010-02-10 | 广东省航盛建设集团有限公司 | Slurry injection technique of sleeve valve tube of cloth bag |
| CN102444118A (en) * | 2010-10-15 | 2012-05-09 | 中铁五局（集团）有限公司 | Construction method for grouting reinforcement of sleeve valve pipe |
| CN102505684A (en) * | 2011-11-02 | 2012-06-20 | 河海大学 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
| CN103628912A (en) * | 2013-11-04 | 2014-03-12 | 葛洲坝集团基础工程有限公司 | Goaf management filling grouting construction method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136866A (en) * | 2021-03-24 | 2021-07-20 | 中国建筑第八工程局有限公司 | Grouting reinforcement construction method for sleeve valve pipe of soil loose water-rich stratum |
| CN113153318A (en) * | 2021-05-25 | 2021-07-23 | 重庆大学 | Earth-rock mixture stratum grouting reinforcement device and grouting reinforcement method |
| CN113153318B (en) * | 2021-05-25 | 2023-10-24 | 重庆大学 | Grouting reinforcement device and grouting reinforcement method for earth-rock mixture stratum |
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