CN101250873A - High-pressure injection slip-casting construction method for flabbiness foundation - Google Patents
High-pressure injection slip-casting construction method for flabbiness foundation Download PDFInfo
- Publication number
- CN101250873A CN101250873A CNA200810052683XA CN200810052683A CN101250873A CN 101250873 A CN101250873 A CN 101250873A CN A200810052683X A CNA200810052683X A CN A200810052683XA CN 200810052683 A CN200810052683 A CN 200810052683A CN 101250873 A CN101250873 A CN 101250873A
- Authority
- CN
- China
- Prior art keywords
- high pressure
- cement
- jet grouting
- soft foundation
- job practices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a construction method of high pressure jet grouting for a soft foundation, and cement slurry which is jetted in the high pressure jet grouting of a conventional three tube method and the high pressure jet grouting of two tube method is replaced by jet cement powder. The ground returning slurry amount when construction is about 20 percent, after a pile is formed in silt clay and sit formation, and the compressive strength of the cement soil is about 3.9MPa. Using the construction method, the same compressive strength is achieved, the cement content is capable of being saved by 10-20 percent, the returning slurry amount is capable of being controlled in 10 percent when construction, and the effects of saving the cement content and controlling the returning slurry are obvious.
Description
Technical field
The present invention relates to a kind of method for processing foundation, especially a kind of high pressure jet grouting job practices that is used for soft foundation.
Background technology
Jet grounting is after utilizing rig that the Grouting Pipe that has nozzle is pierced or insert the predetermined degree of depth of soil layer, with high pressure slurries or water to be ejected from nozzle, becomes cement earth pile with the undisturbed soil mix, reaches the purpose of soil mass consolidation.
In the prior art, the technology that jet grounting is commonly used at present mainly contains single pipe method, double-tube method and three pipe methods.What generally, spray in the single pipe method is cement paste; A pipe inspection is cement paste in the double-tube method, another pipe inspection be air; Three pipe inspections is respectively cement paste, empty G﹠W in the three pipe methods.Single pipe method is because spray pressure is limited, and expanded diameter is less relatively, obtain bigger expanded diameter and then adopt double-tube method, obtain bigger expanded diameter and then need adopt three pipe methods.Three pipe method high pressure jet groutings are that water by high pressure cuts and mixing water mud and soil, because the requirement of the ejection in the technology, water/binder ratio is general bigger, water under high pressure in addition, and the ground leakage amount is bigger like this, and cement consumption is big.And through practice for many years, adopt three pipe high-pressure rotary jet grouting pile piles after because the pile body water content is higher, the cement-soil unconfined compression strength is all lower than single tube and two-tube soil cement intensity.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of with jet cement powder place of water mud, returns the slurry amount and improves the high pressure jet grouting job practices that is used for soft foundation of soil cement intensity with effective minimizing ground.
For addressing the above problem, the technical solution adopted in the present invention is: a kind of high pressure jet grouting job practices that is used for soft foundation may further comprise the steps:
(1) starts rig boring, double Grouting Pipe is inserted in the boring;
(2) carry pipe, and start high-pressure hydraulic pump and powder jetting machine simultaneously, the Investigation of Cement Powder Spray with water under high pressure and high pressure is mapped in the stratum respectively, mixes the formation induration with undisturbed soil.
Described injection is one or more the combination in churning, fixed spray or the pendulum spray.
The expulsion pressure of described water under high pressure is 20～40MPa.
The expulsion pressure of described cement flour is 0.5～1.5MPa.
The high pressure jet grouting job practices that the present invention is used for soft foundation also can for:
(1) starts rig boring, triple Grouting Pipe are inserted in the boring;
(2) carry pipe, and start high-pressure hydraulic pump, air compressor and powder jetting machine simultaneously, respectively water under high pressure, air and Investigation of Cement Powder Spray are mapped in the stratum, mix the formation induration with undisturbed soil.
Described injection is one or more the combination in churning, fixed spray or the pendulum spray.
The expulsion pressure of described water under high pressure is 20～40MPa.
The expulsion pressure of the cement flour of described high pressure is 0.5～1.5MPa.
The invention has the beneficial effects as follows: come place of water mud with the jet cement powder, can effectively reduce ground and return the slurry amount, save cement consumption, improve the intensity of cement-soil.Conventional high-pressure rotary jet grouting pile technology cement mixing content is generally 40%, return slurry amount about 20% during construction, in mud matter clay and mud stratum behind the pile, about the compressive strength 3.9MPa of cement-soil, adopt this patent technology, reach identical compressive strength, cement consumption can save 10～20%, returns the slurry amount during construction and can be controlled in 10%.
The specific embodiment
The present invention is used for the high pressure jet grouting job practices of soft foundation, may further comprise the steps:
(1) starts rig boring, double Grouting Pipe is inserted in the boring;
(2) carry pipe, and start high-pressure hydraulic pump and powder jetting machine simultaneously, the Investigation of Cement Powder Spray with water under high pressure and high pressure is mapped in the stratum respectively, mixes the formation induration with undisturbed soil.
Described injection is one or more the combination in churning, fixed spray or the pendulum spray.
The expulsion pressure of described water under high pressure is 20～40MPa.
The expulsion pressure of described cement flour is 0.5～1.5MPa.
The high pressure jet grouting job practices that the present invention is used for soft foundation also can for:
(1) starts rig boring, triple Grouting Pipe are inserted in the boring;
(2) carry pipe, and start high-pressure hydraulic pump, air compressor and powder jetting machine simultaneously, respectively water under high pressure, air and Investigation of Cement Powder Spray are mapped in the stratum, mix the formation induration with undisturbed soil.
Described injection is one or more the combination in churning, fixed spray or the pendulum spray.
The expulsion pressure of described water under high pressure is 20～40MPa.
The expulsion pressure of the cement flour of described high pressure is 0.5～1.5MPa.
Below in conjunction with the specific embodiment the present invention is described in further detail:
Huge port, Tianjin railway moves engineering outward, and the stratum is: top layer silty clay, thick 1.5～3.4 meters; Mud matter silty clay, thick 6.0～11.5 meters; Silty clay, thick 5.0～8.5 meters.The employing high-pressure rotary jet grouting pile is handled, 1.0 meters in stake footpath, and stake is long 18 meters.
1, triple rotation slip casting methods
Start rig boring, triple Grouting Pipe are inserted in the boring; Carry pipe, and start high-pressure hydraulic pump simultaneously, air compressor and powder jetting machine, respectively water under high pressure, air and Investigation of Cement Powder Spray are mapped in the stratum, mix the formation rotary churning pile with undisturbed soil.
The expulsion pressure of water under high pressure is 30MPa, and the expulsion pressure of the cement flour of high pressure is 1MPa, and air pressure is 0.7MPa.Adopt this patent technology, cement mixing content 35%, powder jetting machine are powder spray piling powder jetting machine.Do contrast test simultaneously, adopt common process, water spray mud, cement mixing content 40%, water/binder ratio 1: 1.Through the construction contrast, the slurry amount of returning of the present invention is reduced to 9%, 28 day cement-soil intensity common process average out to 3.9MPa by 20% of common process, this patent worker method average out to 4.0MPa, and the effect that slurry is returned in saving cement consumption and control is obvious.
2, two-fold rotation slip casting method
Start rig boring, double Grouting Pipe is inserted in the boring; Carry pipe, and start high-pressure hydraulic pump and powder jetting machine simultaneously, respectively water under high pressure and Investigation of Cement Powder Spray are mapped in the stratum, mix the formation rotary churning pile with undisturbed soil.
The expulsion pressure of water under high pressure is 20MPa, and the expulsion pressure of cement flour is 0.7MPa, adopts this patent technology, and cement mixing content 35%, powder jetting machine are powder spray piling powder jetting machine.Do contrast test simultaneously, adopt common process, water spray mud, cement mixing content 40%, water/binder ratio 1: 1.Through the construction contrast, the slurry amount of returning of the present invention is reduced to 8%, 28 day cement-soil intensity common process average out to 4.0MPa by 18% of common process, this patent worker method average out to 4.1MPa, and the effect that slurry is returned in saving cement consumption and control is obvious.
The foregoing description is to be example with the high-pressure rotary jet grouting pile, the combination of one or more in fixed spray of employing or the pendulum spray certainly, and its principle is the same, no longer narrates for example.
In sum, content of the present invention is not limited in the above-described embodiment, and the knowledgeable people in the same area can propose other embodiment easily within technological guidance's thought of the present invention, but this embodiment comprises within the scope of the present invention.
Claims (8)
1, a kind of high pressure jet grouting job practices that is used for soft foundation may further comprise the steps:
(1) starts rig boring, double Grouting Pipe is inserted in the boring;
(2) carry pipe, and start high-pressure hydraulic pump and powder jetting machine simultaneously, respectively water under high pressure and Investigation of Cement Powder Spray are mapped in the stratum, mix the formation induration with undisturbed soil.
2, the high pressure jet grouting job practices that is used for soft foundation according to claim 1 is characterized in that, described injection is one or more the combination in churning, fixed spray or the pendulum spray.
3, the high pressure jet grouting job practices that is used for soft foundation according to claim 1 is characterized in that, the expulsion pressure of described water under high pressure is 20～40MPa.
4, the high pressure jet grouting job practices that is used for soft foundation according to claim 1 is characterized in that, the expulsion pressure of described cement flour is 0.5～1.5MPa.
5, a kind of high pressure jet grouting job practices that is used for soft foundation may further comprise the steps:
(1) starts rig boring, triple Grouting Pipe are inserted in the boring;
(2) carry pipe, and start high-pressure hydraulic pump, air compressor and powder jetting machine simultaneously, respectively water under high pressure, air and Investigation of Cement Powder Spray are mapped in the stratum, mix the formation induration with undisturbed soil.
6, the high pressure jet grouting job practices that is used for soft foundation according to claim 5 is characterized in that, described injection is one or more the combination in churning, fixed spray or the pendulum spray.
7, the high pressure jet grouting job practices that is used for soft foundation according to claim 5 is characterized in that, the expulsion pressure of described water under high pressure is 20～40MPa.
8, the high pressure jet grouting job practices that is used for soft foundation according to claim 5 is characterized in that, the expulsion pressure of the cement flour of described high pressure is 0.5～1.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810052683XA CN101250873A (en) | 2008-04-10 | 2008-04-10 | High-pressure injection slip-casting construction method for flabbiness foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810052683XA CN101250873A (en) | 2008-04-10 | 2008-04-10 | High-pressure injection slip-casting construction method for flabbiness foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101250873A true CN101250873A (en) | 2008-08-27 |
Family
ID=39954456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810052683XA Pending CN101250873A (en) | 2008-04-10 | 2008-04-10 | High-pressure injection slip-casting construction method for flabbiness foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101250873A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349060B (en) * | 2008-08-29 | 2010-06-09 | 中冶集团武勘岩土基础工程公司 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
| CN102155012A (en) * | 2011-05-20 | 2011-08-17 | 中冶建筑研究总院有限公司 | Foundation reinforcing construction method employing powder high-pressure injection grouting |
| CN102864712A (en) * | 2012-10-16 | 2013-01-09 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN102900072A (en) * | 2012-10-31 | 2013-01-30 | 张松 | Heavy-caliber high-pressure spraying stirring drill and drilling spraying integrated construction method |
| CN103556621A (en) * | 2013-10-21 | 2014-02-05 | 慈溪市科创电子科技有限公司 | Strengthening method for silt foundation |
| CN103741670A (en) * | 2014-01-10 | 2014-04-23 | 东南大学 | Negative skin friction (NSF) removing foundation treatment method |
| CN103806457A (en) * | 2012-11-07 | 2014-05-21 | 北京市市政四建设工程有限责任公司 | Novel construction technology of waterproof curtain |
| CN104695429A (en) * | 2015-03-18 | 2015-06-10 | 山东省水利科学研究院 | Foundation pit inter-pile water stop 90-degree outward swaying shot diaphragm wall process |
| CN104863128A (en) * | 2014-02-24 | 2015-08-26 | 舜元建设(集团)有限公司 | Method for quickly determining pile forming diameter in single-pipe jet grouting method |
| CN105507231A (en) * | 2015-11-28 | 2016-04-20 | 中国建筑第六工程局有限公司 | Strengthening method for enabling disturbed soft soil to recover physical and mechanical properties |
| CN105649053A (en) * | 2016-02-05 | 2016-06-08 | 沙焕焕 | Construction method of multielement stiffness composite pile |
-
2008
- 2008-04-10 CN CNA200810052683XA patent/CN101250873A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349060B (en) * | 2008-08-29 | 2010-06-09 | 中冶集团武勘岩土基础工程公司 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
| CN102155012A (en) * | 2011-05-20 | 2011-08-17 | 中冶建筑研究总院有限公司 | Foundation reinforcing construction method employing powder high-pressure injection grouting |
| CN102864712A (en) * | 2012-10-16 | 2013-01-09 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN102864712B (en) * | 2012-10-16 | 2014-11-26 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN102900072A (en) * | 2012-10-31 | 2013-01-30 | 张松 | Heavy-caliber high-pressure spraying stirring drill and drilling spraying integrated construction method |
| CN103806457A (en) * | 2012-11-07 | 2014-05-21 | 北京市市政四建设工程有限责任公司 | Novel construction technology of waterproof curtain |
| CN103556621A (en) * | 2013-10-21 | 2014-02-05 | 慈溪市科创电子科技有限公司 | Strengthening method for silt foundation |
| CN103556621B (en) * | 2013-10-21 | 2015-05-27 | 开封大学 | Strengthening method for silt foundation |
| CN103741670A (en) * | 2014-01-10 | 2014-04-23 | 东南大学 | Negative skin friction (NSF) removing foundation treatment method |
| CN103741670B (en) * | 2014-01-10 | 2015-12-30 | 东南大学 | A kind of method for processing foundation eliminating negative friction |
| CN104863128A (en) * | 2014-02-24 | 2015-08-26 | 舜元建设(集团)有限公司 | Method for quickly determining pile forming diameter in single-pipe jet grouting method |
| CN104695429A (en) * | 2015-03-18 | 2015-06-10 | 山东省水利科学研究院 | Foundation pit inter-pile water stop 90-degree outward swaying shot diaphragm wall process |
| CN104695429B (en) * | 2015-03-18 | 2016-08-17 | 山东省水利科学研究院 | Foundation ditch waterproof between piles 90 is outside one's consideration to pendulum spray wall technique |
| CN105507231A (en) * | 2015-11-28 | 2016-04-20 | 中国建筑第六工程局有限公司 | Strengthening method for enabling disturbed soft soil to recover physical and mechanical properties |
| CN105649053A (en) * | 2016-02-05 | 2016-06-08 | 沙焕焕 | Construction method of multielement stiffness composite pile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101250873A (en) | High-pressure injection slip-casting construction method for flabbiness foundation | |
| CN103806479B (en) | A kind of pile foundation combined casting reinforced construction method of combination water-stop curtain | |
| CN104929114A (en) | High pressure jet grouting pile waterproof curtain construction device and method | |
| CN108222005B (en) | Drilling, grouting, spraying and extruding integrated composite grouting complete system and process | |
| CN101768957B (en) | Device for rapid solidification of soft soil foundation by high-pressure injection of double grout body | |
| CN102011399B (en) | PHC pile-based multiple high jet pedestal pile construction method | |
| CN101235636B (en) | Device for fast concreting soft soil ground foundation by high-pressure injecting double-liquor slurry | |
| CN204753574U (en) | High pressure jet grouting pile stagnant water curtain construction equipment | |
| CN102535449B (en) | Construction method of stirring pile and solidifying agent device thereof | |
| CN101250872A (en) | Flabbiness ground strengthened cement mortar stirring pile and pile-formation method thereof | |
| CN104563099A (en) | Porous pipe method large-diameter high-pressure jet grouting pile construction method | |
| CN103388338A (en) | Novel rapid water stopping and soil mass improving method | |
| CN101255693A (en) | Ground strengthening cement mortar rotary-spraying pile and construction method | |
| CN104314106A (en) | Underground diaphragm wall with joint water stop and filling vacancy structure and construction method thereof | |
| CN103741723A (en) | Joint waterproof structure of underground diaphragm wall of underground substation | |
| CN203639952U (en) | Underground diaphragm wall joint waterproof structure of underground substation | |
| CN106223329A (en) | A kind of construction method of full-sleeve rotary churning pile | |
| CN105507336A (en) | Method for forming composite foundation by using dewatering well | |
| CN105178858A (en) | Drilling rig for double-tube high pressure jet grouting technology | |
| CN103195063B (en) | Fresh water splitting post grouting construction method | |
| CN104612137A (en) | Perforated pipe method super-deep, fast, and super-large diameter high pressure chemical churning pile construction method | |
| CN201288325Y (en) | High voltage rotary spraying enlarged footing pre-stress pipe pile | |
| CN208563316U (en) | Large-diameter cast-in-place pile bottom loose soil sediment treatment device | |
| CN113774970B (en) | Cast-in-place pile socketed section defect repairing construction method | |
| CN109518676A (en) | A kind of method of micro- gas explosion injecting treatment macrovoid, loose foundation soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhongkuang Resources Exploration Co., Ltd Assignor: Xu Yujie Contract fulfillment period: 2008.4.18 to 2016.4.19 contract change Contract record no.: 2009110000065 Denomination of invention: High-pressure injection slip-casting construction method for flabbiness foundation License type: Exclusive license Record date: 2009.5.5 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.18 TO 2016.4.19; CHANGE OF CONTRACT Name of requester: ZHONGKUANG RESOURCES EXPLORATION CO., LTD. Effective date: 20090505 |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080827 |