CN110004932A - A kind of nothing returns slurry high pressure jet grouting system and grouting method - Google Patents
A kind of nothing returns slurry high pressure jet grouting system and grouting method Download PDFInfo
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- CN110004932A CN110004932A CN201910401364.3A CN201910401364A CN110004932A CN 110004932 A CN110004932 A CN 110004932A CN 201910401364 A CN201910401364 A CN 201910401364A CN 110004932 A CN110004932 A CN 110004932A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of nothings to return slurry high pressure jet grouting system and grouting method.The grouting system sprays integrated drilling machine, two-tube brill spray air deflector, impact extrusion brill filling flow inlet, jet grouting flow inlet, cement slurry preparing barrel, high pressure jet grouting pump, storage slurry agitator, aperture slurries collection basin, high-voltage pulse grouting pump, brill spray orifice closure and two-tube brill spraying machine tool including brill；The two-tube top for boring spray air deflector is connect with the power head vertical shaft for spraying integrated drilling machine is bored, and the two-tube lower part for boring spray air deflector is connect with the top of the two-tube piston drilling rod, and the bottom of the two-tube piston drilling rod and two-tube brill spraying machine tool connect；The two-tube brill spray air deflector, brill spray orifice closure, two-tube piston drilling rod, two-tube brill spraying machine tool all have two slurry feeding passages, form impact extrusion from top to bottom and bore filling and the independent slurry feeding passage of jet grouting from bottom to top.Present invention can assure that drilling, which sprays work with jet grouting, returns slurry, grout leaking grout without aperture in the process.
Description
Technical field
It is reinforced the present invention relates to soft foundation and returns slurry high pressure jet grouting with impervious grouting process field, specially a kind of nothing
System and grouting method can be widely used for the fields such as water power, municipal administration, railway and highway bridge, harbour, airport and add to soft foundation
Gu and impervious grouting handle, be particularly suitable for the stringent site condition of environmental requirement to soft foundation reinforce with impervious grouting at
Reason.
Background technique
The anti-transformation project strengthening of foundation of east of a river bunding and impervious grouting engineering in the city Jian Mou, due to consolidation by grouting and antiseepage
Construction is located in level-one water conservation district, and design proposes well cementing to consolidation by grouting and Seepage must be effectively controllable, fills
During slurry there is not allowed that aperture return slurry, grout leaking grout and pollute the environmental requirement at level-one water source.
To solve the above problems, taken the lead by owner's unit, design, unit in charge of construction, which combine, to be participated in, exclusively carried out " aperture without
Return slurry High Pressure Jet Grouting Technique research and application " subject study works, and proposes that nothing of the invention returns slurry high pressure jet grouting
System and grouting method.
Summary of the invention
The present invention is intended to provide a kind of nothing returns slurry high pressure jet grouting system and grouting method, using the grouting system and fill
When paste-making method carries out high pressure jet grouting to broken ground, it can be ensured that drilling sprays work with jet grouting and returns in the process without aperture
Slurry, grout leaking grout design the grouting of proposition to meet certain anti-transformation project strengthening of foundation of city east of a river bunding and impervious grouting engineering
The environmental requirement at level-one water source must not be polluted in the process.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of nothing returns slurry high pressure jet grouting system, including bore and spray integrated drilling machine, two-tube brills spray air deflector, impact extrusion are bored and are filled for starching
Pipe, jet grouting flow inlet, cement slurry preparing barrel, high pressure jet grouting pump, storage slurry agitator, aperture slurries collect basin, high-tension pulse irrigation
Stock pump bores spray orifice closure and two-tube brill spraying machine tool；The two-tube top for boring spray air deflector and brill spray the dynamic of integrated drilling machine
The connection of power head vertical shaft, the two-tube lower part for boring spray air deflector are connect with the top of the two-tube piston drilling rod, the two-tube piston
The bottom of drilling rod and two-tube brill spraying machine tool connect；The two-tube brill spray air deflector, bore spray orifice closure, two-tube piston drilling rod,
Two-tube brill spraying machine tool all has two slurry feeding passages, forms impact extrusion from top to bottom and bores filling and the independent confession of jet grouting from bottom to top
Starch channel.
Further, the two-tube spray air deflector that bores bores the grout outlet for filling flow inlet and high-voltage pulse grouting pump by impact extrusion
The pulp absorbing hole of connection, the high-voltage pulse grouting pump is connected to by pulp-absorbing pipe with storage slurry agitator, the storage slurry agitator and system
Slurry bucket is connected to by pipeline, is formed impact extrusion from top to bottom and is bored filling pulp feeding system.
The two-tube brill spray air deflector pumps grout outlet with high pressure jet grouting by jet grouting flow inlet and is connected to, the height
The pulp absorbing hole of pressure jet grouting pump is connected to by pulp-absorbing pipe with storage slurry agitator；The storage slurry agitator and cement slurry preparing barrel pass through pipeline
Connection forms jet grouting pulp feeding system from bottom to top.
The impact extrusion bores filling pressure controlling device and is mounted on high-voltage pulse grouting pump grout outlet, is used as small-pulse effect from top to bottom
It starches during filling is bored in impact extrusion to regulate and control pulse slurry amount without returning.Jet grouting is housed on the high pressure jet grouting pump grout outlet
Pressure controlling device, as high-pressure injection from top to bottom without return slurry impact extrusion bore fill during to injection pressure regulate and control.
Overfall pressure monitoring device is mounted on the outlet of brill spray orifice closure outer tube side path in the hole, is used as and bores spray
It monitors in real time in operation process to returning slurry pressure in the device to hole entered between inner tube and outer tube.
The brill spray orifice closure includes outer tube, the inner tube being set in outer tube, and is cooperated with said inner tube inner wall
Form the two-tube piston drilling rod of piston seal；The brill spray orifice closure outer tube castingin is in grout hole aperture section；The brill spray
The two-tube piston drilling rod of orifice closure and inner tube can form a kind of rotary-piston type enclosed construction, and it is right during work to spray as brill
The up and down two-tube brill spraying machine tool with revolution carries out aperture Dynamic Closed.
The aperture slurries are collected basin and are nested in the brill spray orifice closure, and the outer tube is mounted on the hole of grout hole
Mouthful section, as to bore spray make a trip jet pipe when or issuable a small amount of slurries be collected processing.
The impact extrusion from top to bottom grouting, using a kind of thixotroping Cement paste, as effectively being filled to grouting stratum
Fill out compacted perfusion.The jet grouting from bottom to top, using a kind of cement stabilizing slurries, as effective injection to grouting stratum
It cuts and stirs perfusion.
When drilled grout hole operation, combines the thixotroping Cement paste of mixing with storage slurry agitator by pulper, pass through high-tension pulse
Irrigation stock pump is sent into impact extrusion and is bored in filling flow inlet access aperture, starts brill and sprays integrated drilling machine, has in Cement paste viscous self-styled
Under the conditions of the auxiliary closure of aperture, bored by impact extrusion and fill pressure controlling device and regulate and control Effective Regulation pulse slurry amount, complete opening from upper and
Lower progress small-pulse effect bores filling fast pore-creating without slurry impact extrusion is returned, and carries out compacted closing with hole wall gap to two-tube brill spraying machine tool.
When jet grouting operation, combines the stable slurry of mixing with storage slurry agitator by high-speed pulping machine, filled by high-pressure injection
Stock pump is sent into jet grouting flow inlet access aperture, is started brill and is sprayed integrated drilling machine, bores in impact extrusion and fill the compacted closing formed and hole
Under the conditions of mouth auxiliary closure, control cabinet rotation speed regulating and controlling knob is pumped by high pressure jet grouting and regulates and controls jet grouting pressure, complete opening is certainly
Lower and upper nothing returns slurry jet grouting.
Nothing through the invention returns slurry high pressure jet grouting system and grouting method as a result, preferably resolves softly
Base, which reinforce using high pressure jet grouting, returns slurry problem with impervious grouting operation process.
Preferably, it is described bore spray integrated drilling machine be can carry out geotechnical boring and high pressure jet grouting power head type drill rig or
It can carry out the spindle-type drill of geotechnical boring and high pressure jet grouting.
The pulse grouting pump is the dedicated grouting pump of impact extrusion grouting.The high pressure jet grouting pump is that high pressure jet grouting is special
Use grouting pump.
Preferably, the pulse grouting pump is that pump pressure is greater than 5Mpa, flow is greater than 60L/min, pulse frequency and pulsed quantity
Adjustable pulse grouting pump.The high pressure jet grouting pump is greater than 30Mpa for pump pressure, flow is greater than the high-pressure injection of 80L/min
Grouting pump.
The storage slurry agitator and cement slurry preparing barrel are preferably storage slurry agitator and high-speed slurrying bucket used in conventional grout.
Preferably, the cement slurry preparing barrel list ladle capacity is not less than 400L.The storage slurry agitator is that agitator is starched in the double-deck storage, single
Layer capacity is not less than 200L.
The two-tube brill spraying machine tool includes two-tube high pressure jet grouting drilling rod, is connected under two-tube high pressure jet grouting drilling rod
Two-tube high pressure jet grouting connector of the portion with nozzle, the tunneling boring diamond for being connected to two-tube high pressure jet grouting connector lower part or
Compact bit is bored as impact extrusion from top to bottom and is filled and equipment in jet grouting hole from bottom to top.
Preferably, the two-tube brill spraying machine tool is diameter of phi 73mm or Φ 89mm overall length with the two-tube brill spraying machine tool of diameter.
The two-tube brill spray air deflector is conventional two-tube high pressure jet grouting binary channels air deflector, be can also be used with bilateral
Other of road bore spray air deflector.
It is pressure control device used by conventional grout that the impact extrusion, which bores and fills pressure controlling device with overfall monitoring device,
Including tee tube, the pressure gauge with slurries isolator, control gate valve.
Preferably, the spray orifice closure that bores is preferably with the sealer (disclosure in orifice closure and brill filling device
Number: CN 109208580A) comprising outer tube, tee tube, inner tube, two-tube piston drilling rod.Certainly can also be used can spray to boring
Other orifice closures of Dynamic Closed are carried out in the process.
The thixotroping Cement paste, the thixotropic cement base cream slurry that can be pumped for conventional grout pump.The stable slurry
For striaght cement slurries stable slurry, cement bentonite stable grout can also be used.
Preferably, the thixotroping Cement paste preferably uses cream disclosed in publication number CN106120709A to starch.
Based on the same inventive concept, the present invention also provides it is a kind of using the nothing return slurry high pressure jet grouting system into
The method of row grouting include the following steps: when broken ground is reinforced with impervious grouting S1, using thixotroping Cement paste,
Under the conditions of the viscous self-styled and aperture auxiliary closure that Cement paste has, small-pulse effect fills complete opening without slurry impact extrusion brill is returned from top to bottom,
While drilled grout hole is rapidly completed, the compacted two-tube brill spraying machine tool of closing and hole wall gap；
S2, using cement stabilizing slurries, under the conditions of impact extrusion is bored the sealing for filling and squeezing and being formed and closed with aperture auxiliary closure, complete opening is under
And upper nothing returns slurry jet grouting.
When carrying out broken ground reinforcing with impervious grouting using jet grouting technique as a result, thixotroping cement cream is used first
Small-pulse effect fills slurry complete opening without slurry impact extrusion brill is returned from top to bottom, while drilled grout hole is rapidly completed, the compacted two-tube brill spraying machine of closing
Tool and hole wall gap.Then two-tube brill spraying machine tool with hole wall is compacted blockade with aperture auxiliary closure under the conditions of, using water
Mud stable slurry complete opening forms a kind of injection and static pressure compound grouting mechanism from bottom to top without returning slurry jet grouting.
For the overfall pressure in implementing monitoring hole, there is the outer tube for boring spray orifice closure opening to be formed outside threeway
Pipe, the side path outlet of the threeway outer tube is equipped with for monitoring into overfall pressure monitor dress in the hole between inner tube and outer tube
It sets.In impact extrusion grouting and during jet grouting, overfall pressure real-time perfoming is monitored by overfall monitoring device, when going out in hole
Existing overfall and when overfall pressure is more than specified value takes following measure:
1) impact extrusion, which is bored, fills, and is bored by impact extrusion and fills pressure controlling device control gate valve appropriate regulation reduction pulsed quantity, or carries out gap
Impact extrusion, which is bored, to be filled；
2) jet grouting, by the minimum jet grouting pressure requirements of design code, regulation reduces between jet grouting pressure, or progress
Gap jet grouting, or the waterglass formation rapid hardening slurries of admixture cement weight 3%-8% are irrigated in slurries.
Compared with prior art, the beneficial effects of the present invention are:
For the present invention in existing " single tube high pressure jet grouting " system, aperture is additionally arranged a kind of brill spray orifice closure, the envelope
It is totally-enclosed to close the aperture dynamic that device can realize that broken ground bores during spraying work.
More useful effect is that the present invention is in existing " single tube high pressure jet grouting " method, and drilled grout hole is using touching
Become Cement paste complete opening small-pulse effect without return slurry impact extrusion bore fill pore-forming, while drilled grout hole is rapidly completed, can to bore jet pipe with
Effectively compacted closing is carried out between hole wall, providing a kind of brill spraying machine so as to returning slurry high pressure jet grouting for subsequent nothing has and hole wall
Between the compacted closing effect of blockading.
Above two beneficial effect of the invention can provide for high pressure jet grouting bores spraying machine tool and squeezes with hole wall in a kind of hole
Sealing, which closes to blockade, returns slurry injection and static pressure compound grouting mechanism with the nothing under the conditions of the auxiliary closure of aperture, not only effective solution
Existing " single tube high pressure jet grouting " aperture largely returns slurry, abandons the problems such as slurry waste, pollution environment, and can further be promoted
High-pressure spraying grouter reason and mass effect.
Detailed description of the invention
Fig. 1 is a kind of aperture of the invention without returning slurry high pressure jet grouting system schematic.
Fig. 2 is to bore spray orifice closure structural schematic diagram.
In figure:
1-, which is bored, sprays integrated drilling machine；The two-tube brill of 2- sprays air deflector；3- impact extrusion, which is bored, fills flow inlet；4- jet grouting flow inlet；5- impact extrusion
It bores and fills pressure controlling device；6- cement slurry preparing barrel；Overfall pressure monitoring device in the hole 7-；8- high pressure jet grouting pump；9- storage slurry stirring
Bucket；The aperture 10- slurries collect basin；11- high-voltage pulse grouting pump；12- bores spray orifice closure；The two-tube piston drilling rod of 121-；
122- inner tube；123- outer tube；124- threeway；The two-tube brill spraying machine tool of 13-；14- jet grouting pressure controlling device.
Specific embodiment
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in invention be can be combined with each other.
A kind of nothing returns slurry high pressure jet grouting system, reinforces grouting works using Mr. Yu city dyke transformation Foundation Anti-seepage,
As shown in Figure 1, it includes: to bore to spray integrated drilling machine 1, two-tube brill spray air deflector 2, punching that the nothing, which returns slurry high pressure jet grouting system configuration,
Squeeze bore fill flow inlet 3, jet grouting flow inlet 4, impact extrusion bore and fill pressure controlling device 5, cement slurry preparing barrel 6, overfall pressure monitor in hole
Device 7, high pressure jet grouting pump 8, jet grouting pressure controlling device 14, high pressure jet grouting pump control cabinet, storage slurry agitator
9, aperture slurries collect basin 10, high-voltage pulse grouting pump 11, bore spray orifice closure 12, two-tube brill spraying machine tool 13.Wherein bore spray
Orifice closure 12 includes two-tube piston drilling rod 121, outer tube 123, inner tube 122.
Wherein, two-tube brill spray 2 top of air deflector is connect with the integrated 1 power head vertical shaft of drilling machine of spray is bored.Two-tube brill sprays air deflector 2
Lower part is connect with the spray two-tube piston drilling rod 121 of orifice closure is bored.Bore spray two-tube 121 lower part of piston drilling rod of orifice closure and double
Pipe bores 13 connection of spraying machine tool.Two-tube brill spray air deflector 2 is bored by impact extrusion fills flow inlet 3 and 11 grout outlet of high-voltage pulse grouting pump company
It is logical.Two-tube brill spray air deflector 2 pumps 8 grout outlets with high pressure jet grouting by jet grouting flow inlet 4 and is connected to.High-voltage pulse grouting
It pumps 11 pulp absorbing holes and is connected to by pulp-absorbing pipe with storage slurry agitator 9.High pressure jet grouting pumps 8 pulp absorbing holes and is stirred by pulp-absorbing pipe and storage slurry
The connection of bucket 9 is mixed, cement slurry preparing barrel 6 is connected to storage slurry agitator 9.Impact extrusion, which is bored, fills the connection of pressure controlling device 5 in high-voltage pulse grouting pump
11 grout outlets.The connection of overfall pressure monitoring device 9 is boring spray 123 side of orifice closure outer tube to overfall mouth in hole.Aperture slurries
Basin 7 is collected to be nested in brill spray orifice closure 12.Spray 123 castingin of orifice closure outer tube is bored in grout hole aperture section.
Thixotroping Cement paste proportion, cement stabilizing grout coordinate ratio, from top to bottom without return slurry impact extrusion bore fill control parameter, under
And upper nothing returns slurry high pressure jet grouting control parameter and is shown in Table 1, table 2, table 3, table 4.
1 thixotroping Cement paste of table matches table
2 cement stabilizing grout coordinate ratio table of table
Table 3 bores irrigation technology state modulator table without slurry impact extrusion is returned
Table 4 without return slurry High Pressure Jet Grouting Technique state modulator table
It bores and fills aperture, spray orifice closure, opening diameter 110mm, aperture depth 1.5m, using 0.5:1 cement underflow are bored in installation
The outer tube 123 of the long 1.6m of castingin, outer diameter 108mm, the castingin depth of outer tube 123 are below ground depth 1.0m, the side of outer tube 123
To channel outlet height 0.1m from the ground.Overfall pressure monitoring device in connecting hole.
The present embodiment is equipped with long 1.4m, outer diameter 73mm and bores spray orifice closure inner tube, can be with the two-tube work of orifice closure
Plug drilling rod forms a kind of rotary-piston sealing structure.
It is filled during section bores filling according to each brill and bores the spray two-tube piston drilling rod of orifice closure and interior seal of tube length of fit
It is required that successively tripping in has with two-tube brill spraying machine is connect in grout hole according to hole depth configuration two-tube brill spraying machine tool total length.
The two-tube piston drilling rod of spray orifice closure is bored in two-tube brill spraying machine tool connection, two-tube brill sprays air deflector, bores spray one bores
Mechanomotive force head vertical shaft.
It is bored by 1 configuration requirement mixing impact extrusion of table and fills thixotroping Cement paste.Start high-voltage pulse grouting pump, according to 2 scun of table
Punching bores the requirement of irrigation technology state modulator without slurry impact extrusion is returned, and is bored by impact extrusion and fills pressure controlling device control gate valve, and regulation impact extrusion is bored
Pulse slurry amount is filled, while starting brill and sprays integrated drilling machine and small-pulse effect is carried out without returning slurry punching with filling from top to bottom, with boring to grouting hole section
It squeezes to bore and fill, until complete opening impact extrusion, which bores to fill, to be terminated.
By 2 configuration requirement mixing jet grouting cement stabilizing slurries of table, start high pressure jet grouting pump, according to 4 high pressure of table
The requirement of jet grouting technological parameter pumps control cabinet rotation speed regulating and controlling knob by high pressure jet grouting, regulates and controls jet grouting pressure, together
Shi Kaidong bores the integrated drilling machine complete opening of spray and is carried out from bottom to top without slurry jet grouting is returned, until complete opening jet grouting terminates.
During impact extrusion grouting and jet grouting, overfall pressure real-time perfoming is monitored by overfall monitoring device, works as hole
Inside occur that following measure can be taken when overfall and overfall pressure are more than specified value:
1) impact extrusion brill fills, and can be bored by impact extrusion and fill pressure controlling device control gate valve appropriate regulation reduction pulsed quantity, or between progress
Gap impact extrusion, which is bored, to be filled.
2) jet grouting can pump control cabinet rotation speed regulating and controlling knob by jet grouting, fill by the minimum injection of design code
It starches pressure requirements appropriate regulation and reduces jet grouting pressure, or carry out gap jet grouting, or add cement weight in slurries
3%-8% waterglass formed rapid hardening slurries be irrigated.
The present embodiment reinforces grouting works using Mr. Yu city dyke transformation Foundation Anti-seepage, is realized during boring spray substantially
Nothing returns slurry, and construction quality effect is significantly better than conventional high pressure jet grouting technique.
The content that above-described embodiment illustrates should be understood as that these embodiments are only used for being illustrated more clearly that invention, and not have to
In the range of limitation invention, after having read invention, those skilled in the art are equal to the modification of the various equivalent forms of invention
Fall within the application range as defined in the appended claims.
Claims (10)
1. a kind of nothing returns slurry high pressure jet grouting system, including brill sprays integrated drilling machine (1), two-tube brill sprays air deflector (2), impact extrusion is bored
Fill flow inlet (3), jet grouting flow inlet (4), cement slurry preparing barrel (6), high pressure jet grouting pump (8), storage slurry agitator (9), aperture
Slurries collect basin (10), high-voltage pulse grouting pump (11), bore spray orifice closure (12) and two-tube brill spraying machine tool (13)；
Brill spray orifice closure (12) includes outer tube (123), the inner tube (122) being set in outer tube (123), and with institute
The inner wall for stating inner tube (122) cooperatively forms the two-tube piston drilling rod (121) of piston seal；
The two-tube top for boring spray air deflector (2) is connect with the power head vertical shaft for spraying integrated drilling machine (1) is bored, the two-tube brill spray
The lower part of air deflector (2) is connect with the top of the two-tube piston drilling rod (121), the bottom of the two-tube piston drilling rod (121) with
Two-tube brill spraying machine tool (13) connection；
Two-tube brill spray air deflector (2) bores the grout outlet company for filling flow inlet (3) and high-voltage pulse grouting pump (11) by impact extrusion
Logical, the pulp absorbing hole of high-voltage pulse grouting pump (11) is connected to by pulp-absorbing pipe with storage slurry agitator (9)；The two-tube brill sprays air deflector
(2) it pumps (8) grout outlet with high pressure jet grouting by jet grouting flow inlet (4) to be connected to, which pumps the suction of (8)
Slurry mouth is connected to by pulp-absorbing pipe with storage slurry agitator (9)；
Two-tube brill spray air deflector (2) bores spray orifice closure (12), two-tube piston drilling rod (121), two-tube brill spraying machine tool
(13) two slurry feeding passages are all had, fill independent logical for starching with jet grouting from bottom to top to form impact extrusion from top to bottom and bore
Road；
The aperture slurries are collected basin (7) and are nested in brill spray orifice closure (12), and the outer tube (123) is mounted on filling
Starch the aperture section in hole.
2. nothing according to claim 1 returns slurry high pressure jet grouting system, which is characterized in that the high-voltage pulse grouting pump
(11) it is bored on grout outlet equipped with impact extrusion and fills pressure controlling device (5).
3. nothing according to claim 1 returns slurry high pressure jet grouting system, which is characterized in that the high pressure jet grouting pump
(8) jet grouting pressure controlling device (14) is housed on grout outlet.
4. nothing according to claim 1 returns slurry high pressure jet grouting system, which is characterized in that the brill sprays orifice closure
(12) there is outer tube (123) opening to form threeway outer tube, and the side path outlet of the threeway outer tube is equipped with to be entered for monitoring
Overfall pressure monitoring device (9) in hole between inner tube (122) and outer tube (123).
5. nothing described in any one of -4 returns slurry high pressure jet grouting system according to claim 1, which is characterized in that the storage slurry
Agitator (9) is connected to cement slurry preparing barrel (6) by pipeline.
6. nothing described in any one of -4 returns slurry high pressure jet grouting system according to claim 1, which is characterized in that the brill spray
Integrated drilling machine is that can carry out the power head type drill rig of geotechnical boring and high pressure jet grouting or can carry out geotechnical boring and high pressure spray
Penetrate the spindle-type drill of grouting.
7. nothing described in any one of -4 returns slurry high pressure jet grouting system according to claim 1, which is characterized in that described two-tube
Boring spraying machine tool includes two-tube high pressure jet grouting drilling rod, the two-tube height for being connected to two-tube high pressure jet grouting drilling rod lower bands nozzle
Pressure jet grouting connector and the tunneling boring drill bit for being connected to two-tube high pressure jet grouting connector lower part.
8. a kind of return the method that slurry high pressure jet grouting system is in the milk using nothing described in any one of claim 1-7,
It is characterized in that, include the following steps: when broken ground is reinforced with impervious grouting
S1, using thixotroping Cement paste, Cement paste have it is viscous it is self-styled with aperture auxiliary closure under the conditions of, complete opening is from upper
And lower small-pulse effect is filled without returning slurry impact extrusion and bore, while drilled grout hole is rapidly completed, two-tube the brills spraying machine of compacted closing have between hole wall
Gap；
S2, using cement stabilizing slurries, under the conditions of closing and the aperture auxiliary closure for filling compacted formation are bored in impact extrusion, complete opening is under
And upper nothing returns slurry jet grouting.
9. the method for grouting according to claim 8, which is characterized in that on the outer tube for boring spray orifice closure (12)
Equipped with for monitoring into overfall pressure monitoring device (9) in the hole between inner tube (122) and outer tube (123)；It is in the milk in impact extrusion
During jet grouting, monitored by overfall pressure real-time perfoming in overfall monitoring device device to hole, when occur in hole overfall and
Overfall pressure takes following measure when being more than specified value:
1) impact extrusion, which is bored, fills, and is bored by impact extrusion and fills pressure controlling device control gate valve appropriate regulation reduction pulsed quantity, or carries out gap
Impact extrusion, which is bored, to be filled；
2) jet grouting, by the minimum jet grouting pressure requirements of design code, regulation reduces between jet grouting pressure, or progress
Gap jet grouting, or add waterglass formation rapid hardening slurries in slurries and be irrigated.
10. the method for grouting according to claim 9, which is characterized in that the mix ratio of the waterglass is cement weight
The 3%-8% of amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401364.3A CN110004932A (en) | 2019-05-15 | 2019-05-15 | A kind of nothing returns slurry high pressure jet grouting system and grouting method |
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| CN201910401364.3A CN110004932A (en) | 2019-05-15 | 2019-05-15 | A kind of nothing returns slurry high pressure jet grouting system and grouting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114277785A (en) * | 2021-12-31 | 2022-04-05 | 北京中岩大地科技股份有限公司 | Construction method for effectively controlling slurry return of mixing pile |
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| CN114277785A (en) * | 2021-12-31 | 2022-04-05 | 北京中岩大地科技股份有限公司 | Construction method for effectively controlling slurry return of mixing pile |
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Application publication date: 20190712 |