CN105274994A - Suck-back prevention and deposition prevention grouting process and device for deep waterlogged sand layer - Google Patents
Suck-back prevention and deposition prevention grouting process and device for deep waterlogged sand layer Download PDFInfo
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- CN105274994A CN105274994A CN201510756244.7A CN201510756244A CN105274994A CN 105274994 A CN105274994 A CN 105274994A CN 201510756244 A CN201510756244 A CN 201510756244A CN 105274994 A CN105274994 A CN 105274994A
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Abstract
The invention provides a suck-back prevention and deposition prevention grouting process and device for a deep waterlogged sand layer. The grouting device comprises an outer grouting tube and a grouting core tube. The grouting core tube is sleeved with the outer grouting tube through a threaded sleeve. Multiple sets of grout outlets are cut in the periphery of the outer grouting tube. Multiple rubber sleeves covering the grout outlets are arranged on the outer grouting tube. According to the suck-back prevention and deposition prevention grouting process and device, the procedures are simple, and operation is convenient; grouting is conducted on the deep waterlogged and thawed sand layer accurately through ground drilling, grouting pressure can be selected, and grout cannot be sucked back into the grouting tube after grouting is stopped. In addition, the situation that an effective grouting layer section or the grout outlets in the grouting tube are blocked due to the fact that the grout deposits at the bottom of the grouting tube can be effectively prevented; the grouting tube is cleaned with clean water after grouting is completed, grouting holes and the grouting tube can be utilized repeatedly, and repeated intermittent grouting can be conducted on a stratum.
Description
Technical field
The present invention relates to the technical field that mine shaft sandy-silt seepage is administered, particularly relate to one anti-suck sludge proof grouting process and grouting device in deep saturated sand.
Background technology
Mine shaft (vertical or inclined shaft) is when passing through deep saturated sand, and in order to improve shaft excavation efficiency and anti-sealing blowout enters the shaft excavation scope of operation, freezing process is one of reservoir treating method comparatively commonly used.Saturated sand in the stratum certain limit utilizing freezing process to be passed through by pit shaft freezes, flowable water and loose sand are cured as a class Seed harvest, then in such Seed harvest, carry out shaft excavation operation, the shaft excavation scope of operation thus can keep a metastable few water environment.To construct and after entering basement rock, can stop Freezing stratum as rapid, saturated sand will thaw gradually completing pit shaft sand section.Fading away of frost wall, by link up pit shaft and frost wall periphery saturated sand between hydraulic connection, pit shaft proceeds to full water environment by few water frozen environment.
Desirable shaft structure is a water proof pressurized structure closed surrounding formation height, is generally formed by multistory reinforced concreting, but due to the construction technology reason of pit shaft reality, can produce more construction gap in pit shaft total length and connect stubble.In addition, due to construction quality or working-procedure problem, also weak part may be there is on pit shaft.When layer of sand is still in frozen state, thicker frost wall can bear larger water pressure, is enclosed in by pit shaft in the space of a pressure equalizing.But after frozen ground thaws, pit shaft directly bears larger formation water pressure, pit shaft connect batch position due to sealing poor, the disaster that seeps water may be there is, and the position possibility compression damage that pit shaft is weaker, seep water, gushing water, the disaster such as sand of bursting, now existing multiple mine occurred repeatedly affect work plane operation or flood well disaster.For above-mentioned disaster, if when only having infiltration or gushing water, by high strength draining, in the wellbore respective handling is carried out to well bore wall simultaneously, the object of administering infiltration or gushing water can be reached.If but with sand of bursting in exiting water process, high strength draining will form disturbance to large-scale layer of sand, and cause layer of sand to liquefy, a large amount of blowout enters in pit shaft.Saturated sand around pit shaft pours in pit shaft, has emptied pit shaft surrounding formation, can change the local pressure state of pit shaft, threatens to the stability of shaft structure and integrality.
Current a technical barrier is remained for the burst preventing treatment of sand disaster of construction freezing method pit shaft water burst, when pit shaft is submerged, and sand is gushed at the multiple position of well bore wall, how successfully by the layer of sand consolidation around pit shaft, stop layer of sand to be burst in pit shaft gushing is the key of Treatment process.In the technology utilizing the solid sand of slip casting, by surface drilling in deep saturated sand during slip casting, adopt conventional grouting device and technique, often under larger hydraulic pressure, slurries can pass back into Grouting Pipe, and bring silt blocking Grouting Pipe into, cause secondary grouting not implement.In addition, due to slurries segregation detection, easily pile up thicker slurries at the bottom of hole or at the bottom of Grouting Pipe, effective interval of injected hole and Grouting Pipe is shortened, and slip casting effect is not good.
For this reason, designer of the present invention, because above-mentioned defect, by concentrating on studies and designing, is comprehensively engaged in experience and the achievement of related industry for a long time for many years, research and design goes out one anti-suck sludge proof grouting process and grouting device in deep saturated sand, to overcome above-mentioned defect.
Summary of the invention
Object of the present invention is being to provide one anti-suck sludge proof grouting process and grouting device in deep saturated sand, its operation is simple, operation is convenient, exactly slip casting is carried out to deep full water thawing layer of sand by utilizing surface drilling, optional grouting pressure can be realized, and Grouting Pipe can not be entered by suck-back at stopping slip casting rear slurry.In addition, also effectively can to prevent at the bottom of Grouting Pipe pipe heavy slurry, block the slurry outlet in effective slip casting interval or Grouting Pipe, and slip casting terminates to carry out clean water to Grouting Pipe afterwards, can reuse injected hole and Grouting Pipe, realize the interval repeatedly slip casting of formation.
For solving the problem, the invention discloses one anti-suck sludge proof grouting device in deep saturated sand, comprising slip casting outer tube and slip casting core pipe, it is characterized in that:
One end of described slip casting outer tube is closed, and other end opening is also socketed on described slip casting core pipe, and described slip casting outer tube is inserted in by a threaded sleeve in the middle part of described slip casting core pipe,
The periphery of described slip casting outer tube is dug and is organized slurry outlet more, two or four is furnished with at one group of slurry outlet of same radial direction, and many in the axial direction group slurry outlet equi-spaced apart or Unequal distance interval, slip casting outer tube is provided with multiple rubber sleeve, each rubber sleeve is covered in one group of slurry outlet respectively, and the lower end of each rubber sleeve and the tight colligation of slip casting outer tube or bonding, upper end relies on elastic abutment in slip casting outer tube.
Wherein: the other end of described slip casting core pipe is socketed with another threaded sleeve.
Wherein: each group of slurry outlet spacing in the axial direction on described slip casting outer tube is 500mm, each group slurry outlet equi-spaced apart is set to 4.
Wherein: the slurry outlet aperture on described slip casting outer tube is 8mm.
Also disclose one anti-suck sludge proof grouting process in deep saturated sand, at least comprise following steps:
A) grouting device is made, utilize thinner slip casting core pipe to insert thicker slip casting outer tube certain length on ground, slip casting outer tube and slip casting core pipe utilize threaded sleeve to fix, the bottom end closure of slip casting outer tube, dig the axially equidistant of slip casting outer tube or Unequal distance and organize slurry outlet more, slurry outlet covers with rubber sleeve by slip casting outer tube, rubber sleeve lower end and the tight colligation of slip casting outer tube or bonding;
B) form injected hole, in layer of sand, drill through injected hole on ground, injected hole is without the need to arranging orifice tube, and the borehole bottom location of injected hole should exceed boundary's certain length at the bottom of slip casting destination layer, to hold hole wall knockout;
C) in injected hole, divide into grouting device, Xiang Kongzhong divides into grouting device, enters boundary's degree of depth at the bottom of slip casting destination layer under grouting device bottom;
D) grouting device is fixed in injected hole, after grouting device has been divided into, in injected hole, sleeve shell material is injected by slip casting core pipe, treat that sleeve shell material is returned out by the gap between slip casting core pipe and injected hole, the sand amount of carrying is less as ending standard, after terminating note sleeve shell material, in slip casting core pipe, injected clear water rinses slip casting core pipe;
E) slip casing by pressure, after sleeve shell material final set, by slip casting core pipe to slip casing by pressure in slip casting formation at target locations;
F) clear water washes pipe, when single injected hole plasma volume is larger, stops slip casting, and rinses grouting pipeline to injected clear water in slip casting core pipe;
G) secondary grouting, carry out secondary grouting after grouting serous fluid reaches initial set until first time, namely this carries out step e and step F again.
Known by said structure, of the present invention in deep saturated sand anti-suck sludge proof grouting process and grouting device there is following effect:
1, enter under utilizing the grouting device of floor manufacture in inlet well, and utilize sleeve shell material to be fixed grouting device, then slip casting is carried out to formation at target locations, effectively can prevent the problem of grouting serous fluid suck-back in deep saturated sand, can realize single borehole repeatedly slip casting.
2, utilize slip casting core pipe to be socketed the mode of slip casting outer tube, slurries are formed without dead angle flowing in grouting device, effectively avoid the segregation precipitation of slurries in Grouting Pipe.
3, easy to operate, slip casting efficiency is high, and slip casting process control, good to layer of sand solidification effect.
Detailed content of the present invention obtains by explanation described later and institute's accompanying drawing.
Accompanying drawing explanation
Fig. 1 shows the structural representation of anti-suck sludge proof grouting device in deep saturated sand of the present invention.
Fig. 2,3 shows the implementation step schematic diagram of the present invention's anti-suck sludge proof grouting process in deep saturated sand.
Reference numeral:
11, slip casting outer tube; 12, slip casting core pipe; 13, threaded sleeve; 14, slurry outlet.
Detailed description of the invention
See Fig. 1, show of the present invention in deep saturated sand anti-suck sludge proof grouting device.
Described grouting device comprises slip casting outer tube 11 and slip casting core pipe 12, one end of described slip casting outer tube 11 is closed, other end opening is also socketed on described slip casting core pipe 12, wherein, described slip casting outer tube 11 is inserted in by a threaded sleeve 13 in the middle part of described slip casting core pipe 12, and optionally, the other end of described slip casting core pipe 12 is socketed with another threaded sleeve 13, be socketed successively to provide many slip casting core pipes 12, to adapt to different length and scope.
Wherein, the periphery of described slip casting outer tube 11 is dug many group slurry outlets 14, two or four can be furnished with at one group of slurry outlet 4 of same radial direction, and many in the axial direction group slurry outlets 14 can equi-spaced apart or Unequal distance interval, slip casting outer tube 11 is provided with multiple rubber sleeve 15, each rubber sleeve 15 is covered in one group of slurry outlet 14 respectively, and the lower end of each rubber sleeve 15 and slip casting outer tube 11 carry out colligation closely or bonding, upper end relies on elastic abutment in slip casting outer tube, and can according to the intensity of the concrete pressure determination rubber sleeve 15 of slip casting.Device thus, slurries can be realized and enter slip casting outer tube 11 by slip casting core pipe 12, then by the slurry outlet 14 on slip casting outer tube 11 periphery, through rubber sleeve 15 upper end, outflow enters slip casting stratum, as can be seen here, in order to prevent slurries at the bottom precipitation of slip casting outer tube, so slip casting core pipe to be inserted the bottom of slip casting outer tube, and slip casting core pipe does not arrange slurry outlet, allow all slurries return out from the bottom of slip casting core pipe, the slurries in slip casting outer tube can be forced all to be in flow regime.
Wherein, described slip casting core pipe is steel pipe, and outer diameter is 20mm, and wall thickness is 2.5mm, and described slip casting outer tube is steel pipe, and outer diameter is 50mm, and wall thickness is 3mm.
Wherein, the distance of described slip casting core pipe bottom and slip casting outer tube bottom is 20mm, and the bottom of slip casting outer tube is set to tip.
Wherein, the slurry outlet spacing in the longitudinal direction on described slip casting outer tube is generally 500mm, and the slurry outlet in radial direction is traditionally arranged to be 4, and the slurry outlet in radial direction is evenly arranged.
Wherein, described slip casting outer tube determines effective slip casting segment length, and effective slip casting segment length determines according to the thickness of slip casting formation at target locations.
Wherein, the slurry outlet aperture on described slip casting outer tube is 8mm.
Wherein, described rubber sleeve allows certain distortion in slip casting process, can ensure that slurries are flowed out by upper end, and not break under normal grouting pressure and hydraulic pressure.
Wherein, described rubber sleeve can be selected according to design grouting pressure.
Wherein, described surface grout injection boring aperture is 133mm.
Wherein, described inlet well hole depth exceeds slip casting destination layer Wei Di circle 2m.
Wherein, described sleeve shell material is mixed by cement, flyash, swell soil, water.
Wherein, the grouting pressure of described slip casing by pressure is specifically determined according to the physico-mechanical properties of slip casting formation at target locations.
See Fig. 2,3, show grouting process of the present invention, at least comprise following steps:
A) grouting device is made.Utilize thinner slip casting core pipe 12 to insert thicker slip casting outer tube 11 certain length on ground, slip casting outer tube 11 and slip casting core pipe 12 utilize threaded sleeve 13 to fix, the bottom end closure of slip casting outer tube 11.Dig many group slurry outlets 14 the axially equidistant of slip casting outer tube 11 or Unequal distance, each group slurry outlet 14 arranges two or four diametrically.Slurry outlet 14 covers with rubber sleeve 15 by slip casting outer tube 11, and rubber sleeve 15 lower end and slip casting outer tube 11 colligation or the relative close that bonds, according to the intensity of grouting pressure determination rubber sleeve 15.
B) injected hole is formed.In layer of sand, drill through injected hole in permanent position according to design on ground, injected hole is without the need to arranging orifice tube, and unsuitable hole flushing after boring, the borehole bottom location of injected hole should exceed boundary's certain length at the bottom of slip casting destination layer, to hold hole wall knockout.
C) in injected hole, grouting device is divided into.After completing boring, in boring, divide into grouting device, grouting device can utilize many slip casting core pipes 12 to enter injected hole by root by threaded sleeve connection, enters boundary's degree of depth at the bottom of slip casting destination layer under grouting device bottom.
D) grouting device is fixed in injected hole.After grouting device has been divided into, inject sleeve shell material by slip casting core pipe in injected hole, treated that sleeve shell material is returned out by the gap between slip casting core pipe and injected hole, the sand amount of carrying is less as ending standard.After terminating note sleeve shell material, in slip casting core pipe, injected clear water rinses slip casting core pipe.
E) slip casing by pressure.After sleeve shell material final set, by slip casting core pipe to slip casing by pressure in slip casting formation at target locations, slurries can pressure break solidification sleeve shell material target approach stratum in, can reach after grout curing solidification layer of sand object.
F) clear water washes pipe.When single injected hole plasma volume is larger, need interval slip casting.Stop slip casting, and rinse grouting pipeline to injected clear water in slip casting core pipe.
G) secondary grouting.Carry out secondary grouting after grouting serous fluid reaches initial set until first time, namely this carries out step e and step F again.Optionally, as required with slip casting situation, can repeatedly slip casting be carried out, both repeatedly repeatedly carry out step e and step F.
Grouting method of the present invention is applied in the solid sand plug Hydraulic Projects of the huge thick saturated sand slip casting in colliery, northern Shensi, achieves following practical function:
1) under, pipe success rate realizes 100%.Because this method adopts all steel material, divide into Grouting Pipe and grouting device by the impact of mud balance, sand content in injected hole, after entering injected hole under Grouting Pipe and grouting device, grouting device will be caused to be out of shape and to break because of hydraulic pressure and sandy soils pressure, affect slip casting process and quality.
2) utilize this grouting method, the grouting horizon degree of depth in huge thick full water loose sand reaches 110m, and this degree of depth is not the limit depth that this grouting method reaches.According to formation water and formation condition, the slip casting degree of depth still easily extensible.The slip casting degree of depth in the present embodiment, improves 80m than the 30m degree of depth of routine.
3) grouting method in the present invention effectively improves the utilization ratio of injected hole.In the present embodiment, use this grouting method, achieve the interval repeatedly slip casting of single hole, according to actual effect, if slip casting and hole flushing suitable operation, interval slip casting number of times is unrestricted.
4) improve grouting pressure, expand the range of scatter of slurries in layer of sand.This method grout injection control pressure can reach 10MPa, and can ensure grouting device not by pressure break and destruction.Grouting pressure improves several times than conventional method.
Apply grouting method of the present invention in the present embodiment, significantly improve the quality of the solid sand plug Hydraulic Projects of slip casting, and cost reduces significantly, comprehensive benefit is more excellent.
Known by said structure, one of the present invention in deep saturated sand anti-suck sludge proof repeatedly grouting process tool have the following advantages:
The first, anti-suck.Slurry outlet on slip casting outer tube wall utilizes rubber sleeve to seal, achieve the one-way flow feature of slurries, namely slurries only can enter slip casting formation at target locations by slurry outlet and with the gap of rubber sleeve in grouting device, and can not reverse flow, effectively prevent suck-back backflow.
The second, anti-precipitation.Slip casting core pipe is inserted slip casting outer tube, slurries is upwards returned by the end of slip casting outer tube, flows out grouting device by slurry outlet.The method makes slurries be in flow disturbance state all the time in grouting device, can not cause the phenomenon such as flow velocity reduction, slurries segregation, solid particle precipitation at grouting device.
3rd, efficiency is high.According to the length of slip casting formation at target locations and the length of characteristics design grouting device and slurry outlet quantity, single slip casting can the section of note longer, and can the laggard slip casting of in the ranks having a rest of hole flushing.
4th, effective.When layer carries out slip casting significantly to deep and thick sand or hydraulic pressure, utilize the sealing function of rubber sleeve, the pressurize after elevated pressures slip casting and slip casting can be realized, be beneficial to slurries and deposit in space and solidify.
5th, benefit is excellent.Utilize the method to carry out slip casting, single hole slip casting success rate is higher, and grouting horizon is controlled, escapable cost.
It is evident that, above description and record be only citing instead of in order to limit disclosure of the present invention, application or use.Although described in an embodiment and be described in the drawings embodiment, but the present invention do not limit by accompanying drawing example and describe in an embodiment as the optimal mode thought at present to implement the specific examples of instruction of the present invention, scope of the present invention will comprise any embodiment of manual and the appended claim fallen into above.
Claims (5)
1. an anti-suck sludge proof grouting device in deep saturated sand, comprises slip casting outer tube and slip casting core pipe, it is characterized in that:
One end of described slip casting outer tube is closed, and other end opening is also socketed on described slip casting core pipe, and described slip casting outer tube is inserted in by a threaded sleeve in the middle part of described slip casting core pipe,
The periphery of described slip casting outer tube is dug and is organized slurry outlet more, two or four is furnished with at one group of slurry outlet of same radial direction, and many in the axial direction group slurry outlet equi-spaced apart or Unequal distance interval, slip casting outer tube is provided with multiple rubber sleeve, each rubber sleeve is covered in one group of slurry outlet respectively, and the lower end of each rubber sleeve and the tight colligation of slip casting outer tube or bonding, upper end relies on elastic abutment in slip casting outer tube.
2. grouting device as claimed in claim 1, is characterized in that: the other end of described slip casting core pipe is socketed with another threaded sleeve.
3. grouting device as claimed in claim 1, is characterized in that: each group of slurry outlet spacing in the axial direction on described slip casting outer tube is 500mm, and each group slurry outlet equi-spaced apart is set to 4.
4. grouting device as claimed in claim 1, is characterized in that: the slurry outlet aperture on described slip casting outer tube is 8mm.
5. an anti-suck sludge proof grouting process in deep saturated sand, at least comprises following steps:
A) grouting device is made, utilize thinner slip casting core pipe to insert thicker slip casting outer tube certain length on ground, slip casting outer tube and slip casting core pipe utilize threaded sleeve to fix, the bottom end closure of slip casting outer tube, dig the axially equidistant of slip casting outer tube or Unequal distance and organize slurry outlet more, slurry outlet covers with rubber sleeve by slip casting outer tube, rubber sleeve lower end and the tight colligation of slip casting outer tube or bonding;
B) form injected hole, in layer of sand, drill through injected hole on ground, injected hole is without the need to arranging orifice tube, and the borehole bottom location of injected hole should exceed boundary's certain length at the bottom of slip casting destination layer, to hold hole wall knockout;
C) in injected hole, divide into grouting device, Xiang Kongzhong divides into grouting device, enters boundary's degree of depth at the bottom of slip casting destination layer under grouting device bottom;
D) grouting device is fixed in injected hole, after grouting device has been divided into, in injected hole, sleeve shell material is injected by slip casting core pipe, treat that sleeve shell material is returned out by the gap between slip casting core pipe and injected hole, the sand amount of carrying is less as ending standard, after terminating note sleeve shell material, in slip casting core pipe, injected clear water rinses slip casting core pipe;
E) slip casing by pressure, after sleeve shell material final set, by slip casting core pipe to slip casing by pressure in slip casting formation at target locations;
F) clear water washes pipe, when single injected hole plasma volume is larger, stops slip casting, and rinses grouting pipeline to injected clear water in slip casting core pipe;
G) secondary grouting, carry out secondary grouting after grouting serous fluid reaches initial set until first time, namely this carries out step e and step F again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510756244.7A CN105274994B (en) | 2015-11-06 | 2015-11-06 | Anti-suck sludge proof grouting process and grouting device in deep saturated sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510756244.7A CN105274994B (en) | 2015-11-06 | 2015-11-06 | Anti-suck sludge proof grouting process and grouting device in deep saturated sand |
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| CN105274994A true CN105274994A (en) | 2016-01-27 |
| CN105274994B CN105274994B (en) | 2017-06-09 |
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| CN106703038A (en) * | 2016-11-30 | 2017-05-24 | 上海建工集团股份有限公司 | Mechanical check horizontal reciprocating grouting pipe and construction method thereof |
| CN112523221A (en) * | 2020-11-12 | 2021-03-19 | 温州竺陌机械科技有限公司 | Pile foundation engineering slip casting pipe with self-cleaning function |
| CN112917660A (en) * | 2021-01-27 | 2021-06-08 | 山东科技大学 | Efficient anti-blocking backflow grouting pipe and method |
| CN113389201A (en) * | 2021-06-30 | 2021-09-14 | 大连理工大学 | Grouting method of efficient anchor rod pressure grouting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113389201A (en) * | 2021-06-30 | 2021-09-14 | 大连理工大学 | Grouting method of efficient anchor rod pressure grouting system |
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|---|---|
| CN105274994B (en) | 2017-06-09 |
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Effective date of registration: 20210721 Address after: 300000 building 709, Minghai center, CCCC C Valley, pilot Free Trade Zone, Binhai New Area, Tianjin (Dongjiang Bonded Port Area) Patentee after: China Coal Science and Technology Co.,Ltd. Address before: No.82, Jinye 1st Road, hi tech Zone, Xi'an City, Shaanxi Province Patentee before: XI'AN RESEARCH INSTITUTE OF CHINA COAL TECHNOLOGY & ENGINEERING Group Corp. |