CN109306849A - The constructing device and construction method of underground anti-seepage curtain - Google Patents
The constructing device and construction method of underground anti-seepage curtain Download PDFInfo
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- CN109306849A CN109306849A CN201811459068.0A CN201811459068A CN109306849A CN 109306849 A CN109306849 A CN 109306849A CN 201811459068 A CN201811459068 A CN 201811459068A CN 109306849 A CN109306849 A CN 109306849A
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 238000005553 drilling Methods 0.000 claims abstract description 80
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002689 soil Substances 0.000 claims description 31
- 239000002002 slurry Substances 0.000 claims description 21
- 239000004568 cement Substances 0.000 claims description 20
- 239000011440 grout Substances 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000007569 slipcasting Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
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- 230000003014 reinforcing effect Effects 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
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- 229910000831 Steel Inorganic materials 0.000 description 5
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- 238000012545 processing Methods 0.000 description 2
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- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
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- 229920002472 Starch Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
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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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- 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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
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- Fluid Mechanics (AREA)
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- Hydrology & Water Resources (AREA)
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Abstract
The constructing device and construction method of underground anti-seepage curtain.Slot section and slip casting or mixing pile are mutually lapped that the poor continuity to form wall, antiseepage be not stringent, and pile body mutually overlapped complicated technology and part overlap the repetition and waste of material of body of a pile.Present invention composition includes: saw drilling machine and saw drilling rod (17), kelly (6) lower part on the saw drilling machine is connect with the saw drill rod thread, described is the circumferential cylindrical structure for being equidistantly equipped with one group of sawtooth (18) in outer surface according to drilling rod, backpitch setting that the sawtooth is counterclockwise, spacing between sawtooth described in neighbouring two is 5-15cm, and the angle between the sawtooth and horizontal plane is 30 °.The present invention is used for the constructing device and construction method of underground anti-seepage curtain.
Description
Technical field:
The present invention relates to the constructing devices and construction method of a kind of underground anti-seepage curtain, belong to reservoir dam and prevent blending underground engineering
Seepage action of ground water field is prevented in construction.
Background technique:
Currently, seepage proof curtain is the antiseepage curtain wall formed by whirl spraying, stirring, slip casting mostly.Dual tube method is generally mostly used, i.e.,
Using twin-channel double Grouting Pipe, while the injection stream impact failure soil body of high pressure slurries and air two media is ejected,
To form cement slurry and silt particle mixture, as nozzle is rotated and is promoted when injection, cement slurry and surrounding soil shape
At cylindric induration, underground is formed by multiple mutually overlapped pile bodies in this way and is intercepted water seepage proof curtain.Its key and difficult point are
Overlap joint between each pile body.
One, concrete cut
Concrete cut begins to use at the beginning of the 50's of 20th century in Italy and France, and subsequent various countries promote in succession,
Meanwhile China also starts that the technology is studied, tried out and developed.Currently, main antiseepage wall technology has both at home and abroad:
1, water jetting is at wall
Water jetting is that soil layer construction is destroyed using the impact force of water pump and molding jet stream, and water and soil mixing slime flux returns ground, while benefit
The constantly impulsion up and down of special molding tool is manipulated with hoist engine, further destroys soil layer, cutting finishing hole wall is formed regular
Slot after, be poured concrete (or plastic concrete), be perfused various flexible mortars or be laid with anti-seepage geomembrane, formed one
A complete cut-pff wall.
, grab bucket method at wall
Grab bucket method is thin-walled slot to be formed using improved hydraulic grab, and be poured or be laid with antiseepage in the slot that construction is formed
Material, to form one section of complete cut-pff wall.
, groove milling method is at wall
Groove milling method is to be cut stratum and formed slot using a kind of special cutting tool, in the slot that construction is formed
Interior, casting or laying impervious material form one section of cut-pff wall, construct paragraph by paragraph and be linked to be a complete cut-pff wall.
, sheet-pile be perfused wall
The 50's Mos of 20th century, France, Germany etc. develop sheet-pile perfusion cut-pff wall skill on the basis of steel sheet pile diaphragm wall
Art forms continuous cut-pff wall by sinking grooving, hoisting grouting using a kind of special special-shaped capstan engine.
, deep-layer stirring engineering method
The technology is cement slurry to be sprayed into the soil body with special single head or multi-drill small-diameter deep-layer mixing pile machine, and stir into water
Soil forms continuous cut-pff wall after solidification.
, self-hardening slurry method
Cutoff wall with self-setting mortar is used in the country such as Mexico, the U.S., France, and principle is to cause slot using grooving utensil,
With slurry strengthened wall, and various curing agent and a small amount of additive are added, it is agitated uniformly after, self-solidifying form wall.
, SMW method
SMW method is developed by Japan, and principle is carried out in engineering site to certain depth soil layer with multiaxis shape drilling blender
Drilling, while ejection cement slurry at drill bit is mixed repeatedly with foundation soil, continuous cut-pff wall is formed after solidification.
, high-pressure injection method
High compression injection techniques wash away cutting soil using high pressure spray jetting, gas or slurry medium, destroy by filling earth formation, make to starch
Liquid and soil body particle are admixed and form the continuous impervious wall for meeting design direction, depth, thickness and structure feature, and reinforcing ground is reached
The effect of base and antiseepage.
, kerf method
Its grooving mechanism of kerf method is: will be mixed in mud by the saw blade cutting soil on the power head by gravel pump with
Reverse circulating mode is discharged outside slot.Slotting length of the trench saw is 3.0m, 15 ~ 100 cm of groove width, and groove depth is reachable
100m.Kerf method at wall process flow are as follows: guide groove excavates and supporting, is laid with track, slot of spreading and sinking in, drilling machine and bores guide hole, kerf in place
Machine kerf (after certain length), clear slot, lower slider, downcomer, to slider and isolation channel section casting concrete.
Two, seepage proof curtain
In base pit engineering, seepage proof curtain is beaten frequently with two rows of cement mixing pile protections, and the mutual overlap joint of two campsheds is preferably not less than
150mm, technique are that two sprays four are stirred.The form being often used has following several:
1) perfusion campshed prop adds two rows of sets to beat cement mixing pile seepage proof curtain, is suitable for foundation pit relatively depth and foundation pit side-wall safety
It is used when class requirement is higher, curtain should be placed in after campshed.
) soil nailing or prestressed anchor prop add two rows of sets to beat cement mixing pile seepage proof curtain, when shallower suitable for foundation pit
It uses.
) cement mixing pile two rows set packs that insert reinforcing bar, steel pipe or channel steel etc. in pile body whole as support system, and
Setting is at the top of mixing pile with a thickness of 0. 2 m, width and the consistent reinforced concrete soil pressure plate of wall.
Three, diaphram wall
It is intercept water antiseepage, earth-retaining, load-bearing and the continuous wall constructed that underground diaphragm wall method, which is in below ground,.Confrontation is impregnated with relatively tight
When lattice require, or the deep big foundation pit in soft foundation, frequently with diaphram wall, adaptation range of the diaphram wall to soil
Very wide, the ground that can be applied to weak alluvium, medium ground, closely knit sandy gravel stratum and rock is medium.It is main to be applicable in
There are intensive groups of building or important underground utilities around foundation pit, surface subsidence around and building settlement are required strictly to limit
When processed, and reverse construction is used, above and below the ground when synchronous construction, underground continuous wall-enclosure structure is also used as main structure
A part.Such as deeper subsurface room, the underground parking, undergrond street, underground railway, underground storehouse, mine in house in actual life
Well etc. can be applied.
In the construction of diaphram wall, several sections of slots usually are divided on the periphery of proposed underground engineering, in mud off
Supporting under, using pore-creating power auger grooving hole, after slot reaches projected depth, junction block is put at slot both ends, to slot
Hole section carries out concrete perfusion under mud using direct pipe method.Then the brill for successively completing each section of slot paragraph by paragraph is dug and perfusion is mixed
Solidifying soil, it is finally that adjacent wall section connection is integral, a continuous underground wall body is formed, plays to intercept water and prevents blending earth-retaining load-bearing
Effect.
The construction of diaphram wall according to the difference of grooving machinery and grooving mechanism can be roughly divided into grab type, impact type and
Rotary three kinds of grooving modes, there are equipments it is at high cost, construction efficiency is low, undesirable at wall continuity the problems such as；Also it adopts
With cost is relatively low, the higher the trench saw grooving of grooving efficiency and pours diaphram wall.Underground impervious wall need to be partitioned into
Slot, and overlap joint and leakproof, each slot section between emphasis consideration slot section is needed to require mud off, prevent landslip of the sides of the trench from influencing concrete
Pour quality of wall.
The limitation and disadvantage of construction method of underground continuous wall:
(1) for karst area containing the very high sandy gravel stratum of artesian head or very soft clay, if do not used other ancillary measures, mesh
It is preceding to be still difficult to using underground diaphragm wall method.
If construction site organization and administration are not good at, it is likely to result in live moist and miriness, influences the condition of construction, Er Qieyao
Increase the processing work to discarded slurry.
If construction wrong or soil layer condition are special, it is easy to appear and irregularly backbreaks and landslip of the sides of the trench.
The metope of cast-in-place diaphram wall is usually rougher, if more demanding to metope, the smooth processing of metope increases
Duration and cost.
Interim soil-baffling structure of the diaphram wall as being only used as construction period, just loses its use after the completion of base pit engineering
Value, so when excavation of foundation pit is not deep, then not as good as using other methods economy.
Need to there are a certain number of dedicated construction equipments and the professional construction troop with certain technical level, make this technology
Popularization is subject to certain restrictions.
Under normal conditions, the cost of diaphram wall is higher than cast-in-situ bored pile and deep-mixed pile, therefore, need to be by conscientious
Technical economic analysis after it can just be selected.
Summary of the invention:
The object of the present invention is to provide a kind of site preparation of curtain wall, continuity are good, barrier performance is high, the underground anti-seepage curtain of low cost
The constructing device and construction method of curtain.
Above-mentioned purpose is realized by following technical scheme:
A kind of constructing device of underground anti-seepage curtain, composition include: saw drilling machine and saw drilling rod, the active on the saw drilling machine
Drilling rod lower part is connect with the saw drill rod thread, and described according to drilling rod is the circumferential circle for being equidistantly equipped with one group of sawtooth in outer surface
Column construction, the sawtooth is counterclockwise, and backpitch is arranged, and the spacing between sawtooth described in neighbouring two is 5-15cm,
Angle between the sawtooth and horizontal plane is 30 °.
The constructing device of the underground anti-seepage curtain, the saw drilling rod lower end are equipped with grout outlet and are equipped with drill bit.
The constructing device of the underground anti-seepage curtain, the sawtooth are 3-4 row.
A kind of construction method of the constructing device of underground anti-seepage curtain, by slush pump by the antiseepages cementing material such as cement slurry
Be pumped to saw drilling rod in, diesel engine by saw drilling machine power head drive kelly rotation, kelly drive saw drilling rod with
The speed of 10-30r/min rotates, and goes up and down zipper tape by drilling rod lifting hydraulic cylinder and drilling rod and moves on the related saw drilling rod of kelly
Lower reciprocating motion, borer chassis slideway and chassis slide back and forth driving hydraulic cylinder driving saw drilling machine, drive kelly along advance
Direction horizontal reciprocating movement or swing, the antiseepages such as cement slurry cementing material are pressed into slot bottom using the slurry outlet of saw drilling rod lower end
Portion then flows through each soil layer back to ground.
The construction method of the constructing device of the underground anti-seepage curtain, the frequency to pump according to drilling rod
Rate is 5-30 times/min, amplitude 5-25cm.
The construction method of the constructing device of the underground anti-seepage curtain, the kelly are past along direction of advance level
The frequency moved again is 5-10 times/min, amplitude 3-10cm.
The utility model has the advantages that
1. the present invention provides a kind of novel construction method of underground anti-seepage curtain wall.Design is scientific and reasonable for it, apparatus and process is simple, curtain
Site preparation, the continuity of wall are good, and depth is big, and seepage capability is strong, are the wide underground anti-seepage curtain constructions of a kind of low cost, applicability
New method.
The construction technology of underground anti-seepage curtain wall of the present invention has the slip casting of diaphram wall and rotary churning pile and mixing pile concurrently and stirs
Mix function and advantage, overcome slot section and slip casting or mixing pile to be mutually lapped the poor continuity to form wall, antiseepage not stringent
Deficiency avoids repetition and waste that pile body mutually overlapped complicated technology and part overlap material of body of a pile, eliminates adjacent studs
Body cannot condense the shortcomings that being worse than pile body with the slip casting of inter-pile soil layer or mixing quality the same period, without clearing up a large amount of boring mud and giving up
Mud is abandoned, which keeps curtain wall thickness and grouting stirring quality more uniform, to ensure that the continuity of curtain wall and whole
Body, therefore the anti-seepage effect of the curtain wall is more preferable.
Antiseepage curtain wall of the invention be machinery work continuously in situ stir formed curtain wall, continuity is good, wall depth is big,
Slot section or stake holes interval need not be divided to construct, pause need not be segmented without considering that it is mutually overlapped, in operation process and takes out underground saw
Drilling rod and drill bit only need to make wall section mutual tongue and groove in part repeat to overlap at the head and the tail of antiseepage curtain wall or construction pause, because
This, it is better than the continuity of diaphram wall and has higher barrier performance；In addition, the engineering method can be in earlier antiseepage curtain wall
Two sides it is spaced apart or close to the one or multi-channel antiseepage curtain wall of constructing, can also pass through insertion reinforcing bar according to requirement of engineering
Net or plant reinforcing bar improve its intensity and retaining support effect.
Construction method of the invention is unique and process equipment is uncomplicated, and construction efficiency is higher, without larger height space and
Construction site, without friction, low noise, operation is continuous, boring mud and mud return to that ground is few, and environmental pollution is small, equipment dismounting, migration
Light, price advantage is big, and economic benefit is very considerable.
Construction method of the invention is not only used in highway, railway, municipal administration, subway, underground pipe gallery and deep big base
The construction of the underground engineering in hole etc., is also applicable in the anti-seepage reinforcing of river dyke, controls the works such as seepage flow and the migration of underground water
Journey.It can also be continuously improved and perfect by further testing application, be improved efficiency and quality, gradually expand its scope of application,
Therefore, application prospect is boundless.
Detailed description of the invention:
Attached drawing 1 is the structural schematic diagram of present invention saw drilling machine；
Attached drawing 2 is the front view of present invention saw drilling rod；
Attached drawing 3 is the top view of present invention saw drilling rod；
In figure: 1, diesel engine and hydraulic pump；2, gearbox；3, power head；4, hoist engine；5, gadder；6, kelly；7, main
Dynamic drilling rod lifting hydraulic cylinder；8, kelly lifting buckle；9, borer chassis slideway is sawed；10, kelly goes up and down control handle；
11, kelly revolving speed control handle；12, kelly rotates clutch；13, it is hydraulic to slide back and forth driving for saw borer chassis
Cylinder；14, connector is filled the water；15, transverse concave groove；16, screw thread；17, drilling rod is sawed；18, sawtooth；19, drill bit；20, grout outlet.
Specific embodiment:
Embodiment 1:
A kind of constructing device of underground anti-seepage curtain, composition include: saw drilling machine and saw drilling rod 17, saw its main composition of drilling machine
Are as follows: diesel engine and hydraulic pump 1, gearbox 2, power head 3, hoist engine 4, gadder 5, kelly 6, drilling rod lifting hydraulic cylinder 7,
Kelly lifting buckle 8, borer chassis slideway 9, kelly go up and down control handle 10, kelly revolving speed control handle
11, kelly rotation clutch 12, saw borer chassis slide back and forth driving hydraulic cylinder 13, and kelly cross sectional shape is positive six
The hollow drill pipe of side shape, the upper end fill the water connector 14 by screwed connection, and kelly outer wall is equipped with laterally recessed at regular intervals
Slot 15, lower end can be connected with screw thread 16 with saw drilling rod 17, and kelly lifting buckle drilling rod lifting hydraulic cylinder is fixed simultaneously
And cover on kelly, kelly lifting clamp buckle in the transverse concave groove of kelly, 6 lower part of kelly with it is described
The connection of saw drill rod thread, described according to drilling rod is the circumferential cylindrical structure for being equidistantly equipped with one group of sawtooth 18 in outer surface, institute
The sawtooth stated is counterclockwise, and backpitch is arranged, and the spacing between sawtooth described in neighbouring two is 5-15cm, the sawtooth
Angle between horizontal plane is 30 °.
Embodiment 2:
According to the constructing device of underground anti-seepage curtain described in embodiment 1, the saw drilling rod lower end is equipped with grout outlet 20 and pacifies
Equipped with drill bit 19.
Embodiment 3:
According to the constructing device of underground anti-seepage curtain described in embodiment 1, the sawtooth is 3-4 row.
Embodiment 4:
A kind of construction method of the constructing device of underground anti-seepage curtain described in embodiment 1-3, construction equipment mainly by saw drilling machine,
The composition such as drilling rod and matched conventional mud pump and common construction attaching material is sawed, by slush pump by antiseepages such as cement slurries
Cementing material is pumped in saw drilling rod, and diesel engine drives kelly rotation by the power head of saw drilling machine, and kelly drives
It saws drilling rod to rotate with the speed of 10-30r/min, it is related to go up and down the dynamic kelly of zipper tape by drilling rod lifting hydraulic cylinder and drilling rod
Saw drilling rod pumps, and borer chassis slideway 9 and chassis slide back and forth the driving saw drilling machine of driving hydraulic cylinder 13, drives actively
Drilling rod is along direction of advance horizontal reciprocating movement or swing, and the antiseepages such as cement slurry cementing material is using the slurry outlet for sawing drilling rod lower end
It is pressed into slot bottom, then flows through each soil layer back to ground, when construction, saw drilling machine drives the rotation of saw drilling rod and moves up and down,
By sawtooth sawing on drilling rod and rotary-cut slot sidewall formation, while making soil layer and the impervious materials such as the cement slurry that flows through are abundant
Original place stirs to form the indurations such as cement stabilized soil or low-grade concrete, changes the permeability on the stratum that saw drilling rod passes through
Can, form the better underground anti-seepage curtain wall of continuity.Can also it is spaced apart in the two sides of earlier antiseepage curtain wall or close to
Construction multiple tracks antiseepage curtain wall can also improve its intensity and earth-retaining branch by insertion steel mesh or plant reinforcing bar according to requirement of engineering
Protect effect.Slush pump has certain pressure and traffic requirement, and can be according to different depth and stratum and the fortune of saw drilling rod
Dynamic speed carries out pressure adjustment, guarantees that slurries can flow out to ground around saw drilling rod, and is not that discharge is excessive, and saw bores
Machine drives the rotation of saw drilling rod and moves up and down, and by sawtooth sawing on drilling rod and rotary-cut slot side wall sandy soils, while making sand
The impervious materials such as soil layer and the cement slurry flowed through original place is sufficiently stirred to form the indurations such as cement stabilized soil or low-grade concrete,
The permeance property and intensity for changing the stratum that saw drilling rod passes through, form the better underground anti-seepage curtain wall of continuity.It is whole to saw drilling machine
Body or power head part can be moved forward and backward or be swung with certain amplitude and frequency, enable to saw drilling rod to hole wall in front of slot
Apply 100-500N pressure and intermittent contact and be adjacent to, realizes that saw drilling rod constantly cuts hole wall soil layer and gradually advances forward.
The saw drilling machine by adjusting saw rod rotation speed, can pump and swing in conjunction with the depth and strata condition of slot
Frequency and amplitude, and the grouting pressure 0.3-1.5MPa and flow 50-150L/min of adjustment grouting pump realize best matter
Amount and working efficiency.
Embodiment 5:
It is described according to drilling rod according to the construction method of the constructing device of underground anti-seepage curtain described in embodiment 1 or 2 or 3 or 4
The frequency to pump is 5-30 times/min, amplitude 5-25cm, by sawing the rotation of drilling rod and pumping, according to
Saw on drilling rod bores rack saw and cuts sand or soil layer with rotary-cut slot side wall, and is sufficiently stirred with the impervious materials such as the cement slurry that flows through
Cement stabilized soil or low-grade concrete are formed, the water proof curtain wall of uniformly continuous is formed.
Embodiment 6:
According to the construction method of the constructing device of underground anti-seepage curtain described in embodiment 1 or 2 or 3 or 4 or 5, the active
Drilling rod is 5-10 times/min, amplitude 3-10cm along the frequency of direction of advance horizontal reciprocating movement.
The technique that this construction equipment has grooving, slip casting and the stirring of groove milling method, kerf method, rotary churning pile and mixing pile concurrently is excellent
Point eliminates and needs mutually to overlap the complicated technology for forming wall or curtain between each wall section or stirring and grouting pile, and gram
It has taken wall or pile body overlaps not tight, the not stringent deficiency of poor continuity, antiseepage, it is thus also avoided that because of the mutual overlap of pile body
Waste of material.Without being segmented and jumping hole or every hole operation when the present invention constructs, the slip casting of soil layer between adjacent grouting pile ensure that
Mixing quality, and uniformity, continuous whole is realized, the anti-seepage effect of curtain wall is substantially increased, some antiseepage curtains are avoided
Wall is greatly lowered due to the leakage phenomenon that piling wall overlap joint does not occur sternly in addition, the equipment and engineering method also improve working efficiency
Project cost, continuity, good integrity, barrier performance are high, have the technique and advantage of rotary churning pile and mixing pile concurrently, are better than underground
The continuity of diaphragm wall and have higher barrier performance；And by insertion reinforcing bar or reinforcing bar formation higher-strength can be transplanted
The continuous antiseepage curtain wall in underground.
This antiseepage curtain wall construction equipment is to work continuously to form curtain wall, it is not necessary to slot section be divided to construct and consider to overlap, operation
It need not be segmented and pause in journey and take out the drilling tools such as the saw drilling rod of underground, only need to pass through phase at the two ends of curtain wall or construction pause
Mutual tongue and groove repeats to overlap, and meets abundant overlap joint and the antiseepage requirement of seepage proof curtain, therefore, it is continuous better than diaphram wall
Property, avoiding diaphram wall section construction seam crossing easily there is the possibility leaked, has higher continuity and barrier performance；
In addition, the present invention can be spaced apart in the two sides of earlier antiseepage curtain wall or close to arranging one or multi-channel antiseepage curtain wall,
The barrier performance and soil strength and self-stable ability of raising curtain wall play certain supported retaining effect；It can also be according to engineering need
It wants, forms the continuous antiseepage curtain wall in underground of higher-strength by insertion steel mesh or plant reinforcing bar, play certain supporting and retaining system and hold
Recast is used.
The use of this construction equipment and operating method are simple, and construction efficiency is high, without higher spatial and broad operation field
Ground, equipment dismounting and migration are convenient, and scene needs to clear up without a large amount of mud and boring mud, and environmental pollution is small, have very big valence
Lattice advantage, application range and prospect are boundless.
Claims (6)
1. a kind of constructing device of underground anti-seepage curtain, composition includes: saw drilling machine and saw drilling rod, the master on the saw drilling machine
Dynamic drilling rod lower part is connect with the saw drill rod thread, according to drilling rod is that outer surface circumferential direction is equidistantly equipped with it is characterized in that: described
The cylindrical structure of one group of sawtooth, the sawtooth is counterclockwise, and backpitch is arranged, between sawtooth described in neighbouring two
Spacing is 5-15cm, and the angle between the sawtooth and horizontal plane is 30 °.
2. the constructing device of underground anti-seepage curtain according to claim 1, it is characterized in that: the saw drilling rod lower end is equipped with
Grout outlet is simultaneously equipped with drill bit.
3. the constructing device of underground anti-seepage curtain according to claim 1, it is characterized in that: the sawtooth is 3-4 row.
4. the construction method of the constructing device of underground anti-seepage curtain described in a kind of claim 1-3, it is characterized in that: passing through mud
The antiseepages cementing material such as cement slurry is pumped in saw drilling rod by pump, and diesel engine drives kelly to turn by the power head of saw drilling machine
Dynamic, kelly drives saw drilling rod to rotate with the speed of 10-30r/min, passes through drilling rod lifting hydraulic cylinder and drilling rod lifting buckle
The related saw drilling rod of kelly is driven to pump, borer chassis slideway and chassis slide back and forth driving hydraulic cylinder driving saw
Drilling machine, drives kelly along direction of advance horizontal reciprocating movement or swing, and the antiseepages such as cement slurry cementing material is bored using saw
The slurry outlet of bar lower end is pressed into slot bottom, then flows through each soil layer back to ground.
5. the construction method of the constructing device of underground anti-seepage curtain according to claim 4, it is characterized in that: described according to brill
The frequency of bar to pump is 5-30 times/min, amplitude 5-25cm.
6. the construction method of the constructing device of underground anti-seepage curtain according to claim 4, it is characterized in that: the active
Drilling rod is 5-10 times/min, amplitude 3-10cm along the frequency of direction of advance horizontal reciprocating movement.
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| CN201811459068.0A CN109306849A (en) | 2018-11-30 | 2018-11-30 | The constructing device and construction method of underground anti-seepage curtain |
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| CN110374093A (en) * | 2019-07-16 | 2019-10-25 | 深圳市市政工程总公司 | High pressure-bearing crevice water earth-boring cast-in-place pile construction method |
| CN113374007A (en) * | 2021-06-09 | 2021-09-10 | 同济大学 | Underground dive sawing type curtain vertical paving device |
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| CN113374007A (en) * | 2021-06-09 | 2021-09-10 | 同济大学 | Underground dive sawing type curtain vertical paving device |
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Application publication date: 20190205 |