CN104153381A - Waterproof curtain pile, waterproof curtain and construction method of waterproof curtain pile - Google Patents
Waterproof curtain pile, waterproof curtain and construction method of waterproof curtain pile Download PDFInfo
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- CN104153381A CN104153381A CN201410436266.0A CN201410436266A CN104153381A CN 104153381 A CN104153381 A CN 104153381A CN 201410436266 A CN201410436266 A CN 201410436266A CN 104153381 A CN104153381 A CN 104153381A
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Abstract
The invention discloses a novel waterproof curtain pile, a construction method of the waterproof curtain pile and a waterproof curtain adopting the waterproof curtain pile. The waterproof curtain pile comprises a deep-layer stirring pile part close to the ground and a high-pressure rotary spray pile part connected below the deep-layer stirring pile part. Part of a high-pressure rotary spray pile is formed at the bottom of a deep-layer stirring pile according to the waterproof curtain pile, the high-pressure rotary spray pile part is located at the deep position of a soil layer, and the defects that the pure deep-layer stirring pile cannot penetrate into the soil layer too deeply and cannot handle the complex conditions of the deep position of the soil layer are overcome. Meanwhile, due to the fact that the deep-layer stirring pile is arranged at the position, close to the soil layer, of the waterproof curtain pile, the advantages of a traditional deep-layer stirring pile are achieved.
Description
Technical field
The present invention relates to field of civil engineering, relate in particular to a kind of novelty water-stop curtain stake, construct the method for this water-stop curtain stake and adopt the water-stop curtain of this water-stop curtain stake.
Background technology
In Supporting Structure of Deep Foundation Pit in City, often to relate to foundation ditch waterproof, patching, these are processed needs water-stop curtain conventionally.Water-stop curtain has multiple pattern, the rotary churning pile that adds high pressure, deeply stirs stake, continuous high-pressure rotary jet grouting pile etc. continuously as adopted between plain concrete (clay) and steel concrete interlocking pile, reinforced concrete pile.And in the single water-stop curtain engineering that water-stop curtain in Composition Soil Nailing Walls or stake separate with water-stop curtain wall, usually adopt single piling wall or the single high-pressure rotary-spray piling wall of deeply stirring as water-stop curtain.
The dark piling wall that stirs is made up of many deep-mixed piles.Deep-mixed pile utilizes cement to make curing compound, pass through deep-layer stirring, on the spot weak soil and cement are forced to mix and stir, utilize the series of physical, the chemical reaction that between curing compound and weak soil, occur, thereby make weak soil and packing set become to have the cement stabilization soil body pile of some strength.Deep-mixed pile anti-permeability performance is good, and therefore, the dark stirring piling wall being made up of deep-mixed pile can be used as the water seal curtain in impervious wall or deep foundation ditch structure, to prevent subsurface wastewater infiltration system current.
High-pressure rotary-spray piling wall is made up of many high-pressure rotary jet grouting piles.High-pressure rotary jet grouting pile is based on high pressure jet grouting principle, utilize rig to creep into soil layer precalculated position with the Grouting Pipe of nozzle, the high-pressure spray that makes slurries become 20-40Mpa left and right with high-tension apparatus ejects from nozzle, the impact failure soil body, thus the part soil body is decomposed under the acting in conjunction of injection stream impact force, centrifugal force and gravity and mix rear fixed formation cement gel calculus induration pile with slurry agitation.When high-pressure rotary-spray, the rotation of injection limit, nozzle limit and lifting, induration is cylinder.High-pressure rotary jet grouting pile is generally used for Foundation Anti-seepage, improves the engineering such as current character and stable side slope of foundation soil.
But, although deeply stir piling wall have construction more convenient, the advantages such as better economic benefit, but when having rubble, cementing, close sand gravel bed in curtain depth requirements dark (being greater than 16 meters) or soil layer deep and thering are the complex situations such as underground water, the dark piling wall that stirs is difficult to reach sealing object, has and adopt high-pressure rotary-spray piling wall to form water-stop curtain the problem that cost is higher.
Therefore, need to a kind ofly can effectively control cost and can carry out in curtain depth requirements area dark or soil layer Condition In The Depth complexity the foundation ditch waterproof of deep foundation pit support, the water-stop curtain of patching and the water-stop curtain stake wherein adopting.
Summary of the invention
In view of the above problems, the present invention has been proposed to a kind of overcome the problems referred to above or the water-stop curtain addressing the above problem at least in part, water-stop curtain stake and production method thereof are provided.
According to an aspect of the present invention, provide a kind of water-stop curtain stake, comprised the deep-mixed pile part near ground; And under be connected on the high-pressure rotary jet grouting pile part under described deep-mixed pile part.
According to an embodiment of the invention, this water-stop curtain stake is also included in the overlap between described deep-mixed pile part and described high-pressure rotary jet grouting pile part.
According to another implementation of the invention, this water-stop curtain stake also comprises the boring that runs through described deep-mixed pile part, delivers under described deep-mixed pile part for jet pipe, nozzle and the injection slurry etc. that in the time forming described high-pressure rotary jet grouting pile part, described formation high-pressure rotary jet grouting pile part are needed.
According to another aspect of the present invention, provide a kind of water-stop curtain, it comprises that many according to water-stop curtain stake of the present invention.Especially, the deep-mixed pile part of every water-stop curtain stake and high-pressure rotary jet grouting pile part are tangent or partially overlap between two with the deep-mixed pile part of adjacent water-stop curtain stake and high-pressure rotary jet grouting pile part respectively.
According to another aspect of the present invention, provide a kind of manufacture according to the production method of water-stop curtain stake of the present invention, comprise step: the shaft core position of determining described deep-mixed pile part, and the stirring-head that utilizes mixing pile machine to sink and promote described mixing pile machine by cutting soil in the position that will form deep-mixed pile part, and form deep-mixed pile part in the mode of rotation limit, limit water-spray type slurry in this position; The pile body of described deep-mixed pile part is carried out to maintenance; Adopt rig to hole to the deep-mixed pile part through maintenance and pass described deep-mixed pile part and be drilled into the projected depth of described water-stop curtain stake; High-pressure rotary-spray pipe is inserted in boring and be inserted to the desired depth of described water-stop curtain stake; Send slurry by described high-pressure rotary-spray pipe and nozzle thereof toward ground layer soil body, promote and spray slip casting from bottom to top on one side by the churning on one side of high-pressure rotary-spray pipe; And described high-pressure rotary-spray pipe be sprayed onto predetermined altitude and ensure high-pressure rotary jet grouting pile and deep-mixed pile after stake axial direction overlap joint predetermined length, stop high-pressure rotary-spray construction.
Water-stop curtain stake according to the present invention comprises deep-mixed pile part and high-pressure rotary jet grouting pile part, at the bottom of deep-mixed pile forming section high-pressure rotary jet grouting pile, make the depths of high-pressure rotary jet grouting pile part in soil layer, overcome the shortcoming that simple deep-mixed pile can not go deep into soil layer too deeply and can not tackle the complex situations in soil layer deep.Meanwhile, because the soil layer part that approaches of water-stop curtain stake according to the present invention is deep-mixed pile, therefore also there is traditional deep-mixed pile.In brief, combine the advantage of simple deep-mixed pile and high-pressure rotary jet grouting pile according to water-stop curtain stake of the present invention and water-stop curtain, and overcome the shortcoming of these two kinds of conventional piles simultaneously.
Particularly, according to the deep-mixed pile part of water-stop curtain stake of the present invention, curing compound and former foundation soil are uniformly mixed on the spot, utilize to greatest extent original soil.The whipping process of deep-mixed pile part can not make foundation soil side direction extrude, very little on the impact of Adjacent Buildings; Shockproof when construction, noiselessness, pollution-free, work efficiency is high, cost is low, can in urban district He in intensive building, construct.And high-pressure rotary jet grouting pile part easy construction, when construction, only need in soil layer, bore a small diameter bore, just can in soil layer, be injected into larger induration, Construction of High Pressure Jet Grouting Pile compact equipment, can be at narrow and short site operation, can be near foundation ditch periphery existing building foundation construction water-stop curtain.
Brief description of the drawings
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skill in the art.Accompanying drawing is only for the object of preferred embodiment is shown, and do not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.Wherein in the accompanying drawings, the multiple identical parts of alphabetic flag instruction after reference number, in the time of these parts of general reference, will omit its last alphabetic flag.In the accompanying drawings:
Fig. 1 shows the schematic diagram of water-stop curtain stake according to an embodiment of the invention;
Fig. 2 shows the schematic diagram of water-stop curtain stake in accordance with another embodiment of the present invention
Fig. 3 shows the arrangement diagram of water-stop curtain according to an embodiment of the invention;
Fig. 4 shows the arrangement diagram of water-stop curtain in accordance with another embodiment of the present invention; And
Fig. 5 shows the flow chart of the manufacture method of water-stop curtain stake according to an embodiment of the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described.
Fig. 1 schematically shows water-stop curtain stake 100 according to an embodiment of the invention.As shown in Figure 1, water-stop curtain stake 100 comprises two parts, is wherein 110 near the part on ground, and under to be connected under deep-mixed pile part 110 be high-pressure rotary jet grouting pile part 120, between the two, there is overlap 130.Wherein in deep-mixed pile part 110, also there is boring 140, boring 140 is for form high-pressure rotary jet grouting pile part 120 deep-mixed pile part 110 below time use, for formation high-pressure rotary jet grouting pile part 120 needed jet pipes, nozzle and injection slurry are delivered under deep-mixed pile part 110.
The concrete size of deep-mixed pile part, high-pressure rotary jet grouting pile part and overlap need to be selected according to engineering practice conventionally.Water-stop curtain stake according to the present invention is applicable in the curtain degree of depth, and the length of stake is greater than in the engineering practice of 16 meters and applies.According to one embodiment of present invention, conventionally the length of deep-mixed pile part 110 is chosen as to about 13-15 rice, particularly 14 meters of left and right, and determine the length of remaining high-pressure rotary jet grouting pile part 120 according to the middle length of water-stop curtain stake.And the length of overlap 130 at least should be longer than 50 centimetres, to guarantee the smooth transition between deep-mixed pile part and high-pressure rotary jet grouting pile part.
Deep-mixed pile part 110 forms in the mode that is similar to traditional deep-mixed pile manufacture method.Particularly, utilize the materials such as cement as curing compound, by specific Mixing Machine,
On the spot by weak soil and cement grout action of forced stirring, weak soil is hardened into have the cement stabilization body of the elongated cylinder shape of globality, water stability and some strength.Therefore, deep-mixed pile part 110 is shaped as elongated cylinder, and its circular cross-section part typically have a diameter from 40-60 centimetre of left and right, particularly 50 centimetres of left and right.
High-pressure rotary jet grouting pile part 120 forms after deep-mixed pile part 110 forms.Particularly, utilize the equipment such as rig in deep-mixed pile part, hole and be drilled into desired depth under deep-mixed pile part, insert high-pressure rotary-spray pipe and carry out high-pressure rotary-spray, in the jet flow dynamic pressure of high pressure jet stream, the pulsating load of injection stream, the impact force of water piece, cavitation, water wedge effect, under the effect of the factors such as extruding force and air-flow stirring, high energy and high speed injection stream is continuous, concentrate and act on the soil body, the many factors such as compressive stress and erosion simultaneously intensive in compressive stress region generating effect, injection stream makes slurries and soil be uniformly mixed in the impact failure soil body, the raw physics chemical action of cement grout and local products, gel increases and absorbs moisture, crystal hardened, cement grout and the native induration that is consolidated into good endurance, it is high-pressure rotary jet grouting pile part.Therefore, high-pressure rotary jet grouting pile part also has the shape of elongated cylinder, and its circular cross-section can have the size identical with deep-mixed pile part, typically has a diameter from 40-60 centimetre of left and right, particularly 50 centimetres of left and right.But this not necessarily, size that can be different from deep-mixed pile part according to engineering practice selection, is generally larger size.For example, in the time that deep-mixed pile part has 50 cm diameter, the diameter of high-pressure rotary jet grouting pile part can be chosen as to 60 centimetres.
Because boring 140 is used to form high-pressure rotary jet grouting pile part 120, therefore, the center of boring 140 radial direction along water-stop curtain stake in high-pressure rotary jet grouting pile part 120, it has the diameter of 100-150mm, particularly 130mm conventionally.
In Fig. 1, provide the structure of deep-mixed pile part 110 and high-pressure rotary jet grouting pile part 120 arranged concentric.According to engineering practice requirement, the situation that also exists deep-mixed pile part and high-pressure rotary jet grouting pile part decentraction to arrange.In Fig. 2, schematically show water-stop curtain stake 200 in accordance with another embodiment of the present invention, the difference in it and in Fig. 1 is, the non-arranged concentric of tangential direction of deep-mixed pile part 110 and the 120 edge stakes of high-pressure rotary jet grouting pile part.
Fig. 3 and Fig. 4 schematically show according to water-stop curtain of the present invention.Water-stop curtain is water-stop curtain piling wall, and it is formed by many water-stop curtain stakes.In the time utilizing water-stop curtain stake to form water-stop curtain, need each water-stop curtain stake tangent or existence between two to partially overlap to form underground water slider (being that water-stop curtain is to prevent subsurface wastewater infiltration system current).Therefore, also require according to the deep-mixed pile part of every water-stop curtain stake of the present invention and high-pressure rotary jet grouting pile part tangent or partially overlap between two with the deep-mixed pile part of adjacent water-stop curtain stake and high-pressure rotary jet grouting pile part respectively.In the time that the diameter of deep-mixed pile part and high-pressure rotary jet grouting pile part is different, in order to meet above-mentioned requirements, must consider the positioned opposite of deep-mixed pile part and high-pressure rotary jet grouting pile part.For example, as shown in Figure 3, water-stop curtain 300 is formed by many water-stop curtain stakes according to the present invention, and wherein the deep-mixed pile part of every water-stop curtain stake has the diameter of 500mm, and partially overlaps between any two to make spacing 300mm between the central axis of deep-mixed pile part.And high-pressure rotary jet grouting pile part has the diameter of 600mm and partially overlap between any two to make spacing 450mm between the central axis of high-pressure rotary jet grouting pile part.Therefore,, in Fig. 3, deep-mixed pile part and high-pressure rotary jet grouting pile part arranged off-centre gradually, even not need high-pressure rotary jet grouting pile part under some deep-mixed pile part.
And Fig. 4 shows another kind of water-stop curtain 400, wherein the deep-mixed pile part of every water-stop curtain stake and high-pressure rotary jet grouting pile part all have the diameter of 600mm, and partially overlap between any two to make between deep-mixed pile part and the central axis of high-pressure rotary jet grouting pile part all spacing 300mm.
Water-stop curtain stake according to the present invention comprises deep-mixed pile part and high-pressure rotary jet grouting pile part, at the bottom of deep-mixed pile forming section high-pressure rotary jet grouting pile, make the depths of high-pressure rotary jet grouting pile part in soil layer, overcome the shortcoming that simple deep-mixed pile can not go deep into soil layer too deeply and can not tackle the complex situations in soil layer deep.Meanwhile, because the soil layer part that approaches of water-stop curtain stake according to the present invention is deep-mixed pile, therefore also there is traditional deep-mixed pile.And the water-stop curtain being formed by water-stop curtain stake according to the present invention also has above-mentioned advantage.
Fig. 5 shows the flow chart of the manufacture method of water-stop curtain stake according to an embodiment of the invention.The method starts from step S510, wherein determine the stake heart position of deep-mixed pile part, be the shaft core position of agitation pile part, and set up mixing pile machine in deep-mixed pile position, drive piles centered by the shaft core position of agitation pile part by the stirring-head that makes mixing pile machine.Mixing pile machine is installed boring tower and drilling rod according to the pile length of deep-mixed pile part, and guarantees that drilling rod drives piles perpendicular to ground.
At step S520, starting mixing pile machine, makes mixing pile machine cut soil along leading truck vertical stirring and sinks, and control the subsidence velocity of mixing pile machine subsequently.In the time that the stirring-head of mixing pile machine sinks to certain depth, by the definite match ratio mixing cement paste of design.This step S520 is called and stirs in advance sinking in engineering.Be noted that cement paste conventionally adopts 0.4～0.5 water/binder ratio, and to make cement mixed ratio be 14% of soil layer wet density, and note with using with cement paste processed, occur emanating avoiding.In the time that mixing pile machine is electromechanical actuation, can control by controlling current of electric the subsidence velocity of mixing pile machine.
Proceed step S520 until the stirring-head of mixing pile machine sinks to after the projected depth of deep-mixed pile part, now enter step S530, the cement slurrypump that wherein starts mixing pile machine is pressed into cement paste in stratum, the rotation of whitewashing limit, limit promotes stirring-head in strict accordance with the definite hoisting velocity of design simultaneously.Notice that hoisting velocity has strict control, be generally no more than 0.5m/min.This step S530 is called lifting whitewashing and stirs in engineering.
After the stirring-head of mixing pile machine is lifted out to ground, enter step S540, wherein for making in foundation ditch the soil body and cement mixing even, first stirring-head being sunk to projected depth and promotes after stirring-head goes out ground, can again stirring be rotated to limit in front sinks in soil, to projected depth, then the stirring limit rotary lifting of whitewashing is in front gone out to ground.This step can be repeatedly.
In summary, in above-mentioned steps S520-S540, utilize mixing pile machine sink and promote stirring-head by cutting soil in the position that will form deep-mixed pile part, and form deep-mixed pile part by the mode of rotation limit, limit water-spray type slurry in this position.
Subsequently, in step S550, remove remaining cement paste and stick to the foreign material on the stirring-head of mixing pile machine, remove the mixer that is erected at deep-mixed pile position, adopt the method for natural (nature) maintenance to carry out maintenance to the pile body of deep-mixed pile part.The pile body curing age of agitation pile part needs at least 4 days conventionally.
After the maintenance of agitation pile part is completed, in step S560, rig is placed in type agitation pile pile body and keeps vertical.It should be noted, because determine the position of rig according to the shaft core position of high-pressure rotary jet grouting pile.More should be like this in the situation that of agitation pile part and high-pressure rotary jet grouting pile part decentraction.
Subsequently in step S570, adopt this rig to hole in type deep-mixed pile part and pass deep-mixed pile and be drilled into the projected depth of water-stop curtain stake, the pore size of boring is determined according to geological conditions, deep-mixed pile and high-pressure rotary jet grouting pile pile spacing.According to one embodiment of present invention, in the time adopting XY-1 type geological drilling rig to creep into mud circulation retaining wall, φ 130mm is easily selected in aperture.
The method enters step S580 subsequently, wherein high-pressure rotary-spray pipe is inserted in boring and is inserted to the desired depth of water-stop curtain stake, when high-pressure rotary-spray pipe is inserted into after this desired depth, can send slurry toward ground layer soil body by high-pressure rotary-spray pipe and nozzle thereof.Generally speaking, the nozzle of high-pressure rotary-spray pipe is arranged on to the side of jet pipe, jet size opposing jet rate is very large.In single-pipe grouting, nozzle diameter generally can be selected 2.0～3.2mm.And the high-pressure rotary jet grouting pile forming after high-pressure rotary-spray (induration) size is mainly determined by factors such as native classification and compaction rate, high pressure jet grouting method and spraying techniques.In inserting high-pressure rotary-spray pipe, in stock tank, complete cement paste preparation.According to spray technology requirement, the characteristic that slurries should possess is: injection slurry has good spray property; There is enough stability; In slurries, gas is few; Can reconcile the gelling time of slurries; There is good mechanical property; Nontoxic, odorless.According to embodiments of the invention, select Portland cement, as P.O 42.5 cement are prepared cement paste, and determined water/binder ratio by 1: 1 to 1.5:1.Wherein be noted that the leakage amount ensureing in high-pressure rotary-spray process, and make leakage amount be less than 25%.In the time that leakage amount is excessive, can takes to accelerate hoisting velocity and minimizing and send the measures such as slurry amount to be solved.
In step S590, promote and spray slip casting from bottom to top on one side by the churning on one side of high-pressure rotary-spray pipe subsequently.The speed of the rotation of high-pressure rotary-spray pipe, lifting is relevant with the effective radius of jet flow, and the physical dimension of this effective radius and nozzle and spray angle connect each other, and directly affects the characteristic of jet flow.Rule of thumb, churning hoisting velocity should be controlled within the scope of 25cm/min～28cm/min, and rotary speed should be controlled within the scope of 20r/min～28r/min.Wherein to select slower rotating speed and hoisting velocity at the top of high-pressure rotary jet grouting pile part near the scope of the nearly 1m of deep-mixed pile part, be generally 20～23cm/min speed and promote, 20r/min rotation.In addition, utilize pump pressure in high-pressure rotary-spray pipe to control the jet power of churning pipe.In an embodiment of the present invention, be between 25Mpa-23Mpa by pressure selection.Be noted that and should have flowed out after shower nozzle the forward of cement paste for high pressure jet grouting, could start to promote churning pipe, spray slip casting from bottom to top.
High-pressure rotary-spray pipe be sprayed onto predetermined altitude and ensure high-pressure rotary jet grouting pile and deep-mixed pile at stake axial direction overlap joint predetermined length, as above in 50cm after, in step S595, stop high-pressure rotary-spray construction.Cleaning high-pressure rotary-spray pipe, and remove high-pressure rotary-spray pipe, form thus the water-stop curtain stake in the present invention.
A7, water-stop curtain stake as described in any in A1-6, the length of wherein said overlap 130 is at least longer than 50 centimetres.A8, water-stop curtain stake as described in any in A1-7, the length of wherein said deep-mixed pile part is between 13-15 rice and be especially 14 meters, and the diameter of the circular cross-section part of described deep-mixed pile part and high-pressure rotary jet grouting pile part is between 40-60 centimetre and especially 50 centimetres.The method of B13, manufacture water-stop curtain stake as described in B11 or 12, wherein said high-pressure rotary jet grouting pile part and deep-mixed pile part are at least 50 centimetres at the predetermined length of stake axial direction overlap joint.The method of B14, manufacture water-stop curtain stake as described in any in B11-13, the hoisting velocity of wherein said mixing pile machine is no more than 0.5m/min, and the churning hoisting velocity of described high-pressure rotary-spray pipe is within the scope of 25cm/min～28cm/min, and rotary speed is within the scope of 20r/min～28r/min.The method of B15, manufacture water-stop curtain stake as described in any in B11-14, wherein the top of described high-pressure rotary jet grouting pile part near the scope of the nearly 1m of described deep-mixed pile part in time, the churning hoisting velocity of described high-pressure rotary-spray pipe is set within the scope of 20～23cm/min, and rotary speed is set to 20r/min.
It should be noted, the present invention will be described instead of limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment in the case of not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.Being positioned at word " " before element or " one " does not get rid of and has multiple such elements.The use of word first, second and C grade does not represent any order.
Claims (10)
1. a water-stop curtain stake, comprising:
Near the deep-mixed pile part on ground; And
Under be connected on the high-pressure rotary jet grouting pile part under described deep-mixed pile part.
2. water-stop curtain stake as claimed in claim 1, also comprises:
Overlap between described deep-mixed pile part and described high-pressure rotary jet grouting pile part.
3. the water-stop curtain stake as described in claim 1 or 2, also comprises:
Run through the boring of described deep-mixed pile part, jet pipe, nozzle and the injection slurry etc. that are suitable in the time forming described high-pressure rotary jet grouting pile part, described formation high-pressure rotary jet grouting pile part being needed are delivered under described deep-mixed pile part.
4. the water-stop curtain stake as described in any in claim 1-3, wherein said deep-mixed pile part and described high-pressure rotary jet grouting pile part are elongated cylinder.
5. water-stop curtain stake as claimed in claim 4, wherein said deep-mixed pile part and described high-pressure rotary jet grouting pile part concentric are arranged.
6. water-stop curtain stake as claimed in claim 4, wherein said deep-mixed pile part and described high-pressure rotary jet grouting pile part Under Asymmetrical are arranged.
7. a water-stop curtain, comprises that many as the water-stop curtain stake in claim 1-6.
8. water-stop curtain as claimed in claim 7, wherein the deep-mixed pile part of every water-stop curtain stake and high-pressure rotary jet grouting pile part are tangent or partially overlap between two with the deep-mixed pile part of adjacent water-stop curtain stake and high-pressure rotary jet grouting pile part respectively.
9. manufacture a method for water-stop curtain stake, this water-stop curtain stake comprise near the deep-mixed pile part on ground and under be connected on the high-pressure rotary jet grouting pile part under described deep-mixed pile part, the method comprising the steps of:
Determine the shaft core position of described deep-mixed pile part, and the stirring-head that utilizes mixing pile machine to sink and promote described mixing pile machine by cutting soil in the position that will form deep-mixed pile part, and form deep-mixed pile part in the mode of rotation limit, limit water-spray type slurry in this position;
The pile body of described deep-mixed pile part is carried out to maintenance;
Adopt rig to hole to the deep-mixed pile part through maintenance and pass described deep-mixed pile part and be drilled into the projected depth of described water-stop curtain stake;
High-pressure rotary-spray pipe is inserted in boring and be inserted to the desired depth of described water-stop curtain stake;
Send slurry by described high-pressure rotary-spray pipe and nozzle thereof toward ground layer soil body, promote and spray slip casting from bottom to top on one side by the churning on one side of high-pressure rotary-spray pipe; And
Described high-pressure rotary-spray pipe be sprayed onto predetermined altitude and ensure high-pressure rotary jet grouting pile and deep-mixed pile after stake axial direction overlap joint predetermined length, stop high-pressure rotary-spray construction.
10. the method for manufacture water-stop curtain as claimed in claim 9 stake, the step of wherein said formation deep-mixed pile part comprises:
Set up mixing pile machine in described deep-mixed pile position, make the stirring-head of described mixing pile machine centered by the shaft core position of described deep-mixed pile part;
Making described mixing pile machine vertical stirring cut soil sinks until the stirring-head of mixing pile machine sinks to the projected depth of described deep-mixed pile part;
The cement slurrypump that starts described mixing pile machine is pressed into cement paste in stratum, the rotation of whitewashing limit, limit, and promote stirring-head according to predetermined hoisting velocity; And
After the stirring-head of described mixing pile machine is lifted out to ground, described stirring is rotated to limit in front and sink in soil to the projected depth of described deep-mixed pile part, the more described stirring limit rotary lifting of whitewashing is in front gone out to ground.
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| CN104631480A (en) * | 2014-12-26 | 2015-05-20 | 中铁二局股份有限公司 | Method for performing deep foundation pit waterproof curtain construction by adopting high-pressure jet grouting pile machine |
| CN105297753A (en) * | 2015-10-16 | 2016-02-03 | 上海交通大学 | Determining method of hydrogeololgy parameters under the action of waterproof curtains |
| CN108978692A (en) * | 2018-09-12 | 2018-12-11 | 浙江三凯工程管理有限公司 | Water drainage of deep foundation pit system |
| CN109024643A (en) * | 2018-08-09 | 2018-12-18 | 中国地质大学（北京） | A kind of water-stop curtain constructing device, equipment and waterproof curtain construction method |
| CN111501741A (en) * | 2020-04-20 | 2020-08-07 | 山东大学 | Waterproof curtain stirring jet grouting construction drilling tool, construction device and method |
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Application publication date: 20141119 |