CN1102188C - Construction method and equipment for continuous underground wall - Google Patents
Construction method and equipment for continuous underground wall Download PDFInfo
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- CN1102188C CN1102188C CN 98111757 CN98111757A CN1102188C CN 1102188 C CN1102188 C CN 1102188C CN 98111757 CN98111757 CN 98111757 CN 98111757 A CN98111757 A CN 98111757A CN 1102188 C CN1102188 C CN 1102188C
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Abstract
The present invention relates to a construction method of an underground continuous wall. The present invention is characterized in that a dedicated driller is used for drilling holes; after the dedicated driller drills to predetermined depth, cement slurry is injected into the bottom of each hole through a core pipe in a drilling rod in a pressing mode until the surface of the cement slurry is higher than an easy collapse position; a sealing device is placed in the slotted hole fully filled with the cement slurry, and then a reinforced steel cage is placed; concrete is perfused from the bottom of the hole, and the cement slurry which is replaced by the concrete is recovered. Compared with the underground continuous wall with a general slurry retaining wall, the present invention increases the construction speed by tens of times. When the construction method is used for the construction of engineering piles, the manufactured engineering piles have high intensity, the frictional force between the engineering pile and the soil stratum of the periphery of the engineering pile is enlarged because the penetration of high-pressure cement slurry, and the bottom of the engineering pile has no sediment. Therefore, the bearing capability of the underground continuous wall is increased in multiples.
Description
Technical field
The present invention relates to a kind of construction techniques and device, specifically use the construction method of underground continuous wall and the device of concrete spouting.
Background technology
We know, traditional construction of diaphragm wall adopts mud circulation retaining wall grooving boring more, and the effect of mud mainly contains two: first retaining wall, support hole wall with liquid mud, and forming the mud skin, to stablize hole wall anti-collapse; It two is to take slag, makes carrier with the mud of circulation, and the sandstone body refuse that the hole subdrilling is cut out is held fortune under the arm and discharged.There is following shortcoming in this method: the first, and speed of application is very slow.As the mud of carrier normally hole volume 3-5 doubly, must constantly check every indexs such as viscosity, density, colloidity, sand factor of control mud in cyclic process.Mud is held the speed of fortune deslagging under the arm and can't be compared with the direct casting of full screw earth auger.The second, a large amount of alkaline waste muds must be transported outward processing, pollute the increase expense.The 3rd, reinforcing bar must insert in the mud earlier.Bond stress is relatively poor between this reinforcing bar that is stained with mud and concrete.The 4th, the joint often presss from both sides mud and leaks.The 5th, sealer is difficult to pull out, and usually can't reclaim.The stake that the mud off method is made,, there is the mud sediment at the stake end, between stake and the pile soil horizon one deck mud skin arranged, and therefore the end bearing capacity of stake and pile side friction all have weakening significantly, have seriously reduced the bearing capacity of stake.
At present, the piling method of high pressure pressure injection cement paste is arranged also, as described in patent CN1126264A, it is with specific drilling tool boring, once finishes boring, sand concrete free perfusion pile.The cement paste of its pressure injection is not recycled, so cement consumption is above containing more than a times of sand concrete.
Summary of the invention
Technical problem to be solved by this invention is in order to overcome above-mentioned the deficiencies in the prior art, to provide a kind of speed of application fast, mud-less pollution, and no remaining mud skin between reinforcing bar and concrete, joint is good, water-tight, construction of continuous concrete wall method and device that cost is low.This job practices can also be used to make engineering piles.
The technical scheme that the present invention solves the problems of the technologies described above is: a kind of construction of continuous concrete wall method, it is characterized in that it adopts the boring of combined long auger machine, adjacent long screw drill rod blade is meshing with each other, the rotation direction switched in opposite, rotating speed is identical, after reaching desired depth, boring carries brill, annotate to the hole base pressure through the drilling rod inner core tube simultaneously and mix the cement paste of putting retarding agent, be higher than the hole site of easily collapsing until the slurry face, the combined type sealer is placed in the joint of unit body of wall in the slotted eye of fills with water mud, then throw in reinforcing cage, downcomer begins to pour into the concrete of preparing by the design label at the bottom of the hole again, reclaim the cement paste of being replaced up by the aperture and prepare against usefulness again, then be close to the drilling construction that the joint sealer carries out the next unit body of wall by concrete.According to the above-mentioned steps construction, until forming diaphragm wall.
The present invention adopts above-mentioned job practices, and speed of application is fast, and for identical engineering quantity, speed of application can reach more than 30 times of mud circulation panelling construction, and cost also is lower than conventional method, and the quality height.The cement paste of regaining can use repeatedly, is used for retaining wall;
Description of drawings
Below in conjunction with accompanying drawing the present invention is done progressive the description:
Fig. 1 is construction process figure of the present invention.
Fig. 2 is a kind of structural representation of combined type sealer.
Fig. 3 is flat convex sealer structural representation.
Fig. 4 is a groove shaped sealer structural representation.
Fig. 5 is the structural representation of another kind of sealer
Fig. 6 is a drill joint cover schematic diagram.
The specific embodiment
As can be seen from Figure 1, a kind of construction method of underground continuous wall, its concrete steps are as follows:
1. with special-purpose combined long auger machine boring.(easy for drawing, shown in the figure three rigs of SPR-1 type, also can use five rigs of SPR-2 type, seven rigs of SPR-3 type.) this type rig common feature is adjacent drill pipes the blade rotation direction is opposite, is meshing with each other direction of rotation during work but velocity of rotation is identical.In various viscous soil horizons, all can bore down smoothly, " sticking boring " phenomenon does not take place.
2. after being drilled into desired depth, when carrying brill through the drilling rod inner core tube by drill bit place spout to hole base pressure cement injection, until easily collapsing more than the hole site.Grouting pressure is according to the soil layer situation, the different needs adjustment of artesian pressure size and system wall, system stake, and general usual range is 2mpa-20mpa.Can add retarding agent in the cement paste up to 50mpa as required during the system stake.
3. combined type sealer 10, descending reinforcing cage are again placed in the joint of unit body of wall in the slotted eye of fills with water mud.Combined type sealer 10 is made up of groove shaped sealer 11 and flat convex sealer 12, will combine (using the iron wire colligation bottom) earlier throws in again, the body of wall center line is aimed in the cutting of center, wherein flat convex sealer side, anti-inclined to one side support can be installed in spill sealer lower end, puts partially to guarantee that the lower end is unlikely.When pulling out on sealer, this support can come off automatically.
4. downcomer by beginning to pour into concrete at the bottom of the hole, reclaims the cement paste of being replaced by concrete in order to using again.For improving speed of application, should adopt the pumping concrete pouring.Must process filter before cement paste is reused, and constantly replenish loss.Facts have proved repeatedly the cement paste that retaining wall uses, setting time can prolong greatly.
5. extract flat convex sealer at once after the perfusion.
6. be close under the groove shaped sealer and bore, do second section body of wall, extract the groove shaped sealer at once behind the pressure full water mud.Extract the cavity after the cement paste inflow is extracted in back second section slotted eye, avoided joint folder mud burning into sand to leak.
7. pour into second section body of wall.Extract the initiating terminal sealer.And the like construct and complete until diaphragm wall.Construction in this way, one section body of wall that 30m is dark, 1.8m is wide, 0.4-0.6m is thick can be finished within an hour with the pumping concrete pouring, and speed of application is far from the mud off method and can compares.
The present invention uses combined type sealer 10 as shown in Figure 2, and it is made up of flat convex sealer 12 and groove shaped sealer 11 two parts, as shown in Figure 3, Figure 4.Its periphery is circular arc, contacts with drill hole wall, and during use, for preventing groove shaped sealer 11 lower end deflections, anti-inclined to one side support 13 is placed in the lower end of being everlasting, and anti-inclined to one side support can come off when sealer is pulled out automatically.Flat convex sealer 12 is used with the groove shaped sealer, also can be used in the starting vessel section separately, and its lateral surface center has longitudinal groove one, and cutting is alignd with the body of wall center line when laying.Flat convex sealer 12 actual (real) thickness are slightly less than the groove that it is put into, and are convenient to conveniently extract.
Sealer of the present invention can also adopt other forms, and is shown in Figure 5.It can be the combination sealer of hypertonic, and telescopic circular sealer etc., its general purpose are exactly the reliable in quality that guarantees unit body of wall joint, and before the concrete initial set, can extract easily.The sealer of a kind of extension unit body of wall length of 14 expressions among Fig. 5.It is extracted both sides, back slotted eye cement paste and communicates, and is convenient to throw in whole reinforcement cage or makes whole turning.
There is wedge angle in the body of wall that the present invention directly makes with the special-purpose auger of above-mentioned sectional rod between each circular arc.As require straight body of wall, then must be improved again.Fig. 6 is the joint cover schematic diagram of drill bit of the present invention, number in the figure is a drilling rod blade 15, drilling rod core pipe 16, corner cut cutter 17, joint cover 18, joint cover are provided with folding corner cut cutter 17, the corner cut cutter draws in when advancing to bore, do not influence and creep into casting, carry when boring and opening automatically, the wedge angle (shaded side among the figure) that intersects circular arc is cut.
The present invention has following advantage:
1, speed of application is fast.For identical engineering quantity, can reach more than 30 times of mud circulation wall protecting method speed of application.
2, dry operation does not completely have mud contamination and work of treatment.
3, do not need fully to do to lead wall.On general smooth place, just can construct.Therefore shorten the duration, saved expense.Make diaphragm wall with technology of the present invention, construction cost per square meter is equivalent to general pump-grouting concrete, is lower than the diaphragm wall that conventional method is made.
4, do not have remaining mud skin between reinforcing bar and concrete, bond stress is bigger.Body of wall and pile strength and horizontal bearing capacity have been improved.
5, the joint does not press from both sides mud burning into sand layer between each section wall, has prevented to leak.
6, sealer is to extract or extract from cement paste before the initial set of concrete cement, is very easy to.
7, the proportion of cement paste is than the big 40%-50% of mud, and the retaining wall better effects if can be born higher underground artesian pressure.
During 8, with the stake of the method system, the stake end, do not have sediment, no mud skin between pile body and pile soil horizon, so the end load of stake, and side friction all is greatly increased.Bearing capacity can improve 3-4 doubly when being used for non-circular.
9, the concrete piles label is prepared according to designing requirement.Can reach more than the C30, apparently higher than sand concrete free.And cement consumption is significantly less than sand concrete free.Can save more than 40% through practice.
The present invention not only is suitable for construction of continuous concrete wall, also is suitable for the construction of circular stake or non-circular stake, and speed of application is fast, the quality height.Use technology of the present invention and device, when only replacing cement paste, also can make diaphragm wall smoothly with the mud of preparing.This moment, wall quality was slightly poor, but speed of application still improves tens of times than conventional method.
Claims (2)
1. construction of continuous concrete wall method, it is characterized in that it adopts the boring of combined long auger machine, adjacent long screw drill rod blade is meshing with each other, the rotation direction switched in opposite, rotating speed is identical, after reaching desired depth, boring carries brill, annotate to the hole base pressure through the drilling rod inner core tube simultaneously and mix the cement paste of putting retarding agent, be higher than the hole site of easily collapsing until the slurry face, the combined type sealer is placed in the joint of unit body of wall in the slotted eye of fills with water mud, then throw in reinforcing cage, downcomer begins to pour into the concrete of preparing by the design label at the bottom of the hole again, reclaim the cement paste of being replaced up by the aperture and prepare against usefulness again, then be close to the drilling construction that the joint sealer carries out the next unit body of wall by concrete.
2. a combined type sealer that is used for claim 1 method is characterized in that it is combined by flat convex sealer and groove shaped sealer two parts, and the neighboring is in the arc-shaped, contacts with drill hole wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111757 CN1102188C (en) | 1998-12-28 | 1998-12-28 | Construction method and equipment for continuous underground wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98111757 CN1102188C (en) | 1998-12-28 | 1998-12-28 | Construction method and equipment for continuous underground wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1258785A CN1258785A (en) | 2000-07-05 |
| CN1102188C true CN1102188C (en) | 2003-02-26 |
Family
ID=5221660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98111757 Expired - Fee Related CN1102188C (en) | 1998-12-28 | 1998-12-28 | Construction method and equipment for continuous underground wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1102188C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718093B (en) * | 2009-11-14 | 2011-01-26 | 青岛理工大学 | Static pressure type forming device and method for soil-cement underground curtain for cutting off water |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386483C (en) * | 2005-11-30 | 2008-05-07 | 王平 | High-performance cement soil continuous wall construction method |
| CN101196115B (en) * | 2006-12-08 | 2010-10-27 | 石午江 | Construction method for high pressure underground gas storing well |
| CN101818496B (en) * | 2009-02-25 | 2011-07-20 | 中煤第三建设（集团）有限责任公司 | Inversely-constructed underground continuous wall with siamesed reinforcing cage |
| KR20130015267A (en) * | 2010-03-30 | 2013-02-13 | 파우에스엘 인터나치오날 아게 | Method and assembly for constructing a diaphragm wall |
| CN102852158B (en) * | 2012-09-25 | 2014-04-16 | 浙江省地质矿产工程公司 | Construction method for nonstandard diaphragm wall |
| CN103603339A (en) * | 2013-10-29 | 2014-02-26 | 青州市永固基础工程有限公司 | Method for long spiral drilling machine grouting retaining wall hole forming and system thereof |
| CN105804049A (en) * | 2014-12-31 | 2016-07-27 | 云南省第三建筑工程公司 | Anti-hole-collapsing foundation reinforced structure during underground diaphragm wall construction |
| CN108086302B (en) * | 2017-12-29 | 2019-06-28 | 章胜南 | A kind of transverse direction based on underground wall body construction is whole to pour wall width subsidence process |
-
1998
- 1998-12-28 CN CN 98111757 patent/CN1102188C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718093B (en) * | 2009-11-14 | 2011-01-26 | 青岛理工大学 | Static pressure type forming device and method for soil-cement underground curtain for cutting off water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1258785A (en) | 2000-07-05 |
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