CN1514071A - Controllabel densification slip casting construction process - Google Patents
Controllabel densification slip casting construction process Download PDFInfo
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- CN1514071A CN1514071A CNA031418090A CN03141809A CN1514071A CN 1514071 A CN1514071 A CN 1514071A CN A031418090 A CNA031418090 A CN A031418090A CN 03141809 A CN03141809 A CN 03141809A CN 1514071 A CN1514071 A CN 1514071A
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- slip casting
- grouting
- tube drawing
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Abstract
A controllable compacting-grouting technology for reinforcing soft foundation and correcting skew includes providing the reinforcing requirement to control system, determining the ratio of materials, depth for drilling hole and burying pipe, the height for pulling up pipe, and grouting pressure and flow, mixing raw materials, delivering it to grouting system, drilling, burying pipe, grouting while pulling pipe up, and monitoring effect.
Description
Technical field
What the present invention relates to is a kind of foundation grouting construction technology, and particularly a kind of controlled close grouting construction process of neutralizing belongs to building engineering field.
Background technology
The foundation grouting reinforcement process is little with its scale of investment, construction equipment simple, the construction area area is little, little to traffic and ambient influnence, reinforcement depth is easy to advantages such as control, is widely used in fields, underground building such as civil engineering, municipal engineering, hydraulic and electric engineering, transportation and energy, tunnel underground and mines.The particularly correction of the basic reinforcing engineering of the big depth underground engineering in city, urban house structure and underground development machine construction etc., this technology has more advantageous advantage.Yet existing grouting equipment, material and detection means have limited the development in an all-round way of this technology, and along with the rise of other ground stabilization technology, the foundation grouting reinforcement process loses its advantage and status gradually.Find by literature search, " civil engineering mortar depositing construction and the effect detection " that Cheng Xiao, Zhang Fengxiang write, publishing house of Tongji University, in January, 1998, the 17th page, this article has been mentioned maximum dual drilling rod filter pipe technology of present use and the two embolism technologies of bimetallic tube, with regard to these two kinds of technologies, comparatively distinct issues are to make slurries enter predetermined reinforcing scope exactly by designing requirement, and the reliability of slip casting, confidence level are under suspicion.Also have that slip casting effect detects, the limitation of measurement technology and property afterwards, also be the main cause that causes grouting and reinforcing technology development stagnation.
Summary of the invention
The present invention is directed to the deficiency and the defective of existing compaction grouting technology, a kind of controlled close grouting construction process of neutralizing is provided, promptly adopt novel high pressure, low discharge grouting equipment, with a kind of high viscosity, low denseness and difficult flowing and the high injecting paste material of sand factor, inject in the soil mass consolidation effectively by designing requirement, the extruding surrounding soil, thus reach purposes such as strengthening soil strength and density, raising bearing capacity of foundation soil, correction, foundation underpinning.
The present invention is implemented by following technical scheme, and concrete technology is as follows:
(1) reinforcing design is required to offer command and control system, determine material mixture ratio, boring pipe laying depth, tube drawing height, grouting pressure and flow, mix commander's control of slurry, conveying, slip casting and boring, pipe laying, tube drawing;
(2) mixing the slurry feeding system carries out injecting paste material and mixes system technology;
(3) feed conveying system will be mixed prepared material and be delivered to filling system;
(4) filling system carries out material pressure injection technology;
(5) boring, pipe laying, the tube drawing system tube drawing technology in pipe laying and the slip casting process of holing;
(6) the consolidation effect detection system is carried out monitoring in the slip casting process and the effect detection technology behind the grouting and reinforcing.
Below each step of the present invention and technology are described in further detail:
(1) reinforcing design is required to offer command and control system, determine material mixture ratio, boring pipe laying depth, tube drawing height, grouting pressure and flow, the commander who mixes slurry, conveying, slip casting and boring, pipe laying, tube drawing controls specific as follows:
Command and control system is by computerized equipment, composition such as communication apparatus and all kinds of parameter instrumentation, require to carry out proportion design according to reinforcing design, determine material mixture ratio then, the boring pipe laying depth, the tube drawing height, grouting pressure and flow, send instruction by computer, commander mixes the slurry feeding system and carries out work, by communication apparatus commander boring, pipe laying, after above-mentioned work is finished, send instruction by computer, commander's feed conveying system is delivered to filling system with injecting paste material, command filling system to carry out pressure injection work simultaneously, control system is weighed by the proportioning of the various materials of all kinds of parameter instrumentation control feeding systems, mixing time and quality, the pressure of filling system, flow and slip casting metering, after pressure injection finished, the feedback command and control system stopped pressure injection, and it is in place to notify drawbench to press the design height tube drawing then, feed back command and control system again and send the instruction of above-mentioned job order, so circulation is until finishing slip casting.
(2) mix the slurry feeding system carry out injecting paste material mix the system technology specific as follows:
Mixing the slurry feeding system is by 6 groups of storage bins, water source, weighing device, pay-off and 0.5m
3Forced concrete mixer is formed, after obtaining the instruction of command and control system, weigh respectively by charging sequence, be delivered to mixer then and mix system, mixing time is 2～3 minutes, charging sequence is: flyash-water-swell soil-sand-cement-additive-water reducing agent, injecting paste material proportioning percentage by weight is: cement 6～30%, flyash 21～41%, swell soil 4～6%, sand 23～30%, water 20～23%, water reducing agent 0.55～0.75%, water reducing agent are polyamine family macromolecule polymer, additive 0.25～0.35%, additive are that naphthalene is a condensation product.Mix the slurry finish after, send into feed conveying system, carry out the system of mixing of next biscuit then,
The slump 5～the 8cm of this proportioning, compressive strength R
28=3～4MPa, bleeding rate 1.5%.
(3) feed conveying system will be mixed prepared material to be delivered to filling system specific as follows:
Feed conveying system is made up of helical feed formula feeding machine, delivery pump, after obtaining the command and control system instruction, the injecting paste material of the system of mixing is delivered to filling system, and induction system can be carried out speed governing, pressure regulation and adjusting flow, satisfies the requirement of filling system operate as normal.Short distance is carried can directly adopt the feeding machine feeding, and long distance is carried and must be connected the common feeding of delivery pump.
(4) it is specific as follows that filling system carries out material pressure injection technology:
Filling system is made up of variable mortar pump, high voltage power station and mortar metering device, wherein metering device has two types of Weighing type or numeration formulas, 30 liters of grouting pump maximum pressure 6MPa, maximum stream flows, after obtaining the command and control system instruction, send here feed conveying system to such an extent that injecting paste material is pressed in the hole of appointment by design pressure, flow, and determine actual grouting amount by metering device, parameter adjustment grouting pressure, flow by the monitoring system feedback, until finishing slip casting, feed back command and control system then, carry out the work of next circulation.
(5) the tube drawing technology that boring, pipe laying, tube drawing system hole in pipe laying and the slip casting process is specific as follows:
Boring, pipe laying, tube drawing system are pressed into equipment, slip casting pipe laying, slip casting flexible pipe and drawbench by rig, vibrating type and form, adopt the dried mode that fetches earth to hole by designing requirement, bore diameter is less than the pipe laying diameter, adopt vibration-type to be pressed into the equipment pipe laying then, connect the slip casting flexible pipe, carry out slip casting, tube drawing and the periodic duty of slip casting again by the command and control system instruction, until finishing work such as slip casting, tube drawing and pigging, each tube drawing height is 0.5～2m.
(6) the consolidation effect detection system monitoring and the effect detection technology behind the grouting and reinforcing of carrying out in the slip casting process is specific as follows:
The consolidation effect detection system is formed by monitor and detect two parts in the thing afterwards.Monitoring system has contents such as all kinds of parameter instrumentation, soil body level and vertical displacement, soil pressure, pore water pressure and water level observation in the thing, monitoring is to carry out in the slip casting process in the thing, detect has the other contents such as meter, static penetrometer, four-bladed vane boxshear apparatus, ultrasonic wave density tester and drill hole sampling of pressing afterwards, detect afterwards be slip casting finish with curing time after carry out.
The present invention has substantive distinguishing features and marked improvement, with strong points, be applicable to different flabbiness ground strengthened, corrections and foundation underpinning, on the basis of original ground compacting grouting and reinforcing, carried out perfect, by improvement, solved the deficiency and the defective of former construction technology to technology such as grouting process, grouting equipment, injecting paste material and effect detection.
The specific embodiment
With certain subway station pit reinforcing construction process is example, the long 268m of this foundation ditch, and wide 14.6m, underground two layers, buried depth 15m adopts double-deck two to stride structure.Space enclosing structure adopts steel concrete continuous underground wall structure, buried depth 28m.Foundation ditch west end well cutting depth 14.57m, middle part cutting depth 12.72m, eastern end well cutting depth 14.47m.The foundation ditch bottom is in grey silt clay and the gray clay.
In order to improve the soil strength and the coefficient of subgrade reaction of foundation ditch bottom, enhancing hole footing toe is stablized the rigidity with space enclosing structure, reduce the outer soil deformation of bracing of foundation pit distortion and hole, CCG control compacting grouting and reinforcing is adopted at the end, foundation ditch hole, and promptly foundation ditch thing end well adopts and cheats the job practices that the full hall in the end is reinforced, the intermediate standard section adopts the interval stripping to reinforce.According to the permission bearing capacity after the designing requirement ground stabilization is 1.2MPa, and coefficient of subgrade reaction is 15000.The column injecting cement paste diameter that this case design CCG slip casting forms is Φ 600mm, the long 4m of stake.760 of 184 of west end well slip casting hole counts, 200 of eastern end well slip casting hole counts, middle part slip casting hole count meter (sprouting number is 19, every average number of pores 40); Diaphragm wall outside design slip casting hole count is 60 in addition, and column injecting cement paste diameter is Φ 600mm, the long 16.8m of stake.The total grouting amount is 1578.04m
3
The reinforcing order: strengthening construction at the bottom of the advanced owner of a trading company or a workshop, the western termination well, reinforce one by one from two to the intermediate standard section then.
Ancillary technique: at the every 50m of reinforcing area
2An eductor well point is set,, makes soil mass consolidation compacted fixed fast so that extract ground rapidly out with pushing the interstitial water that comes out in the grouting and reinforcing soil.
Construction process 1: mix slurry feeding system (comprise material storehouse) Reasonable Orientation → position, on-the-spot hole setting-out → boring and bury between Grouting Pipe → arrangements grouting pump → pump and Grouting Pipe the employing high-pressure hose underground and be connected → settle that the employing high-pressure hose is connected between feeding machine and delivery pump → delivery pump and grouting pump.
Construction process 2: command system send mix slurry instruct → mix the slurry feeding system by charging sequence weighing, blanking and mix slurry → command system send carry instruction → feeding machine start working with delivery pump → command system sends slip casting instruction → grouting pump and starts working → feed back after back feedback command system → shutdowns that this slip casting is finished, tube drawing 0.5m under the tearing that managing is shifted after operation → this injected hole mud jacking is finished open and be connected of command system → above-mentioned job order of continuation → position, individual hole continuation aforesaid operations in proper order
Technical indicator: grouting pressure 3～5MPa, 20～30 liters of flow rate of grouting, each tube drawing height 0.5m, the injecting paste material slump 5～8cm, compressive strength R
28=3～4MPa, bleeding rate 1.5%.
Effect detection: detect in the thing and adopt level gauge, transit, dip circle, soil pressure and pore water pressure test.
Detect afterwards and adopt cone penetration test, flat chisel side bloated (DMT) test and drill hole sampling test.
Actual effect
Effect detection after reinforcing curing time, soil strength and coefficient of subgrade reaction after the reinforcing all improve a lot than undisturbed soil, the specific penetration resistance P of hole bottom ash look silt clay
sValue is brought up to 0.8MPa～1.4MPa, coefficient of subgrade reaction by original 0.46MPa and is brought up to 15000 by original 6500; The specific penetration resistance P of hole bottom ash look clay
sValue is brought up to 1.0MPa～1.5MPa, coefficient of subgrade reaction by original 0.59MPa and is brought up to 15000 by original 12100.Excavation of foundation pit to bottom slab concreting is finished, and it is 1.5cm that subterranean wall is gone along with sb. to guard him displacement, and building, underground utilities around the foundation ditch are all safe and sound.
Claims (7)
1, a kind of controlled close grouting construction process of neutralizing is characterized in that, concrete technology is as follows:
(1) reinforcing design is required to offer command and control system, determine material mixture ratio, boring pipe laying depth, tube drawing height, grouting pressure and flow, mix commander's control of slurry, conveying, slip casting and boring, pipe laying, tube drawing then;
(2) mixing the slurry feeding system carries out injecting paste material and mixes system technology;
(3) feed conveying system will be mixed prepared material and be delivered to filling system technology;
(4) filling system carries out material pressure injection technology;
(5) boring, pipe laying, the tube drawing system tube drawing technology in pipe laying and the slip casting process of holing;
(6) the consolidation effect detection system is carried out monitoring in the slip casting process and the effect detection technology behind the grouting and reinforcing.
2, this controlled close grouting construction process of neutralizing according to claim 1, it is characterized in that, step (1) is required to offer command and control system with reinforcing design, determine material mixture ratio, boring pipe laying depth, tube drawing height, grouting pressure and flow, the commander who mixes slurry, conveying, slip casting and boring, pipe laying, tube drawing then controls further concrete the qualification:
Require to carry out proportion design according to reinforcing design, determine material mixture ratio then, the boring pipe laying depth, the tube drawing height, grouting pressure and flow, send instruction by computer, commander mixes the slurry feeding system and carries out work, simultaneously by communication apparatus commander boring, pipe laying, after above-mentioned work is finished, send instruction by computer, commander's feed conveying system is delivered to filling system with injecting paste material, command filling system to carry out pressure injection work simultaneously, control system is weighed by the proportioning of the various materials of all kinds of parameter instrumentation control feeding systems, mixing time and quality, the pressure of filling system, flow and slip casting metering are after pressure injection finishes, the feedback command and control system stops pressure injection, it is in place to notify drawbench to press the design height tube drawing then, feeds back the instruction that command and control system is sent above-mentioned job order again, and so circulation is until finishing slip casting.
3, this controlled close grouting construction process of neutralizing according to claim 1 is characterized in that, step (2) is mixed the slurry feeding system carry out injecting paste material and mix that system technology is further concrete to be limited:
After obtaining the instruction of command and control system, weigh respectively by charging sequence, be delivered to mixer then and mix system, mixing time is 2～3 minutes, charging sequence is: flyash-water-swell soil-sand-cement-additive-water reducing agent, mix the slurry finish after, send into feed conveying system, carry out the system of mixing of next biscuit then.
4, this controlled close grouting construction process of neutralizing according to claim 1 is characterized in that, will mix prepared material to step (3) feed conveying system and be delivered to the further concrete qualification of filling system technology:
After obtaining the command and control system instruction, the injecting paste material of the system of mixing is delivered to filling system, and induction system is carried out speed governing, pressure regulation and adjusting flow, satisfies the requirement of filling system operate as normal, short distance is carried and is directly adopted the feeding machine feeding, and long distance is carried and must be connected the common feeding of delivery pump.
5, this controlled close grouting construction process of neutralizing according to claim 1 is characterized in that, step (4) filling system is carried out the further concrete qualification of material pressure injection technology:
30 liters of grouting pump maximum pressure 6MPa, maximum stream flows, after obtaining the command and control system instruction, send here feed conveying system to such an extent that injecting paste material is pressed in the hole of appointment by design pressure, flow, and determine actual grouting amount by metering device, parameter adjustment grouting pressure, flow by the monitoring system feedback, until finishing slip casting, feed back command and control system then, carry out the work of next circulation.
6, this controlled close grouting construction process of neutralizing according to claim 1 is characterized in that, to hole further concrete qualification of tube drawing technology in pipe laying and the slip casting process of step (5) boring, pipe laying, tube drawing system:
Adopt the dried mode that fetches earth to hole by designing requirement, bore diameter is less than the pipe laying diameter, adopt vibration-type to be pressed into the equipment pipe laying then, connect the slip casting flexible pipe, carry out slip casting, tube drawing and the periodic duty of slip casting again by the command and control system instruction, until finishing work such as slip casting, tube drawing and pigging, each tube drawing height is 0.5～2m.
7, this controlled close grouting construction process of neutralizing according to claim 1 is characterized in that, monitoring and the effect detection technology behind the grouting and reinforcing that step (6) consolidation effect detection system is carried out in the slip casting process further specifically limit:
Monitoring system has contents such as all kinds of parameter instrumentation, soil body level and vertical displacement, soil pressure, pore water pressure and water level observation in the thing, monitoring is to carry out in the slip casting process in the thing, detect has the other contents such as meter, static penetrometer, four-bladed vane boxshear apparatus, ultrasonic wave density tester and drill hole sampling of pressing afterwards, detect afterwards be slip casting finish with curing time after carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141809 CN1198021C (en) | 2003-07-24 | 2003-07-24 | Controllabel densification slip casting construction process |
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|---|---|---|---|
| CN 03141809 CN1198021C (en) | 2003-07-24 | 2003-07-24 | Controllabel densification slip casting construction process |
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| CN1198021C CN1198021C (en) | 2005-04-20 |
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| CN 03141809 Expired - Fee Related CN1198021C (en) | 2003-07-24 | 2003-07-24 | Controllabel densification slip casting construction process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846604A (en) * | 2010-04-23 | 2010-09-29 | 北京交通大学 | Detection method and detection device of grouting reinforcement effect in tunnel |
| CN102635112A (en) * | 2012-04-09 | 2012-08-15 | 湖南宏禹水利水电岩土工程有限公司 | Controlled construction process for compaction grouting piles |
| CN102734556A (en) * | 2012-06-15 | 2012-10-17 | 上海市电力公司 | Trenchless construction method for power pipes |
| CN103205962A (en) * | 2013-04-27 | 2013-07-17 | 杨众 | Grouting lifting method of subsided terrace |
| CN105019487A (en) * | 2015-07-13 | 2015-11-04 | 朱奎 | Shallow raft foundation building correcting method |
| CN110411858A (en) * | 2019-06-21 | 2019-11-05 | 中国矿业大学 | A kind of rotary jet grouting reinforces the strength test method of coal body |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101701459B (en) * | 2009-10-16 | 2011-05-04 | 宝钢工程技术集团有限公司 | Method for processing soft soil foundation of intertidal belt to form construction working face |
| CN102721610B (en) * | 2010-04-23 | 2014-04-02 | 北京交通大学 | Detecting device for reinforcement effect of grouting in tunnel |
| KR101527172B1 (en) * | 2014-08-05 | 2015-06-09 | 심두섭 | Apparatus of taking compaction grouting system injection management figure for anti-seismic reinforcement and quality management |
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2003
- 2003-07-24 CN CN 03141809 patent/CN1198021C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846604A (en) * | 2010-04-23 | 2010-09-29 | 北京交通大学 | Detection method and detection device of grouting reinforcement effect in tunnel |
| CN101846604B (en) * | 2010-04-23 | 2013-07-03 | 北京交通大学 | Detection method of grouting reinforcement effect in tunnel |
| CN102635112A (en) * | 2012-04-09 | 2012-08-15 | 湖南宏禹水利水电岩土工程有限公司 | Controlled construction process for compaction grouting piles |
| CN102635112B (en) * | 2012-04-09 | 2014-11-05 | 湖南宏禹水利水电岩土工程有限公司 | Controlled construction process for compaction grouting piles |
| CN102734556A (en) * | 2012-06-15 | 2012-10-17 | 上海市电力公司 | Trenchless construction method for power pipes |
| CN103205962A (en) * | 2013-04-27 | 2013-07-17 | 杨众 | Grouting lifting method of subsided terrace |
| CN105019487A (en) * | 2015-07-13 | 2015-11-04 | 朱奎 | Shallow raft foundation building correcting method |
| CN106168039A (en) * | 2015-07-13 | 2016-11-30 | 朱奎 | A kind of rectifying of leaned building technology of raft plate shallow foundation |
| CN106400858A (en) * | 2015-07-13 | 2017-02-15 | 朱奎 | Building deviation rectification technology |
| CN106436787A (en) * | 2015-07-13 | 2017-02-22 | 朱奎 | Building correction method |
| CN105019487B (en) * | 2015-07-13 | 2017-03-01 | 朱奎 | A kind of rectifying of leaned building method of raft plate shallow foundation |
| CN106436787B (en) * | 2015-07-13 | 2018-03-02 | 朱奎 | A kind of rectifying of leaned building method |
| CN106400858B (en) * | 2015-07-13 | 2018-03-02 | 朱奎 | A kind of rectifying of leaned building technology |
| CN110411858A (en) * | 2019-06-21 | 2019-11-05 | 中国矿业大学 | A kind of rotary jet grouting reinforces the strength test method of coal body |
| CN110411858B (en) * | 2019-06-21 | 2020-06-30 | 中国矿业大学 | Strength testing method for jet grouting reinforced coal body |
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| CN1198021C (en) | 2005-04-20 |
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