CN103556645A - Method for forming grouting space in sand gravel layer - Google Patents
Method for forming grouting space in sand gravel layer Download PDFInfo
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- CN103556645A CN103556645A CN201310453723.2A CN201310453723A CN103556645A CN 103556645 A CN103556645 A CN 103556645A CN 201310453723 A CN201310453723 A CN 201310453723A CN 103556645 A CN103556645 A CN 103556645A
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Abstract
The invention discloses a method for forming grouting space in a sand gravel layer. The method includes steps of (1) forming a drill hole 3 through a permeable ground layer 7 in a position where a curtain wall is to be formed; (2) placing downwards a steel cage 4 to the position of a pebble layer 6 by means of the above drill hole 3, wherein a longitudinal bar-shaped elongated slot 10 is formed in the steel cage 4; (3) installing a spray head 5 at the bottom end of a drill rod 2, and placing downwards the spray head 5 to the position of the pebble layer, wherein the direction of the spray head is identical to that of the bar-shaped elongated slot 10 formed in the steel cage 4; (4) placing downwards a high pressure air conveying pipe 9 to an outer side of the drill rod 2 until the high pressure air conveying pipe reaches the bottom of the drill layer 3; (5) using the spray head 5 to get through high pressure water flows through the drill rod, and vertically moving the drill rod 2 so that the high pressure water flows cut the pebble layer 6 and muddy sand flows to the bottom of the drill hole; (6) simultaneously using a high pressure conveying pipe 9 to input high pressure air, wherein the high pressure air drives muddy sand slurries to erupt out of the earth surface from the bottom of the drill hole so as to form the presupposed grouting space. According to the method for forming the grouting space in the sand gravel layer, the grouted slurries form the effective underground water plugging continuous curtain in the regulated space.
Description
Technical field
The present invention relates to a kind of grouting for water blocking improvement technology, especially a kind of method that forms slip casting space in sand ovum layer.
Background technology
While carrying out water blockoff improvement for thick large Quaternary system side slope at present, the method for slip casting is very conventional.But in slip casting process, slurries are normal far along the random advantage passage diffusion forming in stratum, a large amount of slurries have been wasted, but cannot form effective water blockoff curtain, be the key factor that causes Grouting engineering " effect is uncontrollable, cost is uncontrollable, duration uncontrollable " (Wang Mengshu. Chinese tunnel and underground construction are built technology .[M]. Beijing: People's Transportation Press, 2010).
While implementing grouting for water blocking engineering in thick large Quaternary system sandy gravel, anisotropy due to earth formation and composition, cause high pressure slurries formed splitting slurries filling seam in stratum, apart from boring, just forming advantage passage nearby, and along advantage passage to external expansion, slurries are also outwards filled thereupon.But this advantage passage determined by stratigraphic structure and component thereof, its propagation direction, with certain randomness, is not often target filling direction, and formed obturation can not form effective water blockoff curtain wall yet.Meanwhile, due to the formation of advantage passage, grouting pressure is declined, slurries are in the permeability and all significantly decline of fracturing ability of other direction in space of borehole circumference, can not form to set the effective pile diameter centered by holing.Moreover, owing to there is no at present effective instrument and method, to slurries, mobile in subsurface formations carries out Real-Time Monitoring and observation, can only be according to the drilling data on the registration of grouting pressure table and stratum, according to operating personnel's personal experience, judge rational grouting amount and the time that stops slip casting.Once advantage passage forms in stratum, grouting pressure is stable or decline state, inject a large amount of slurries and just can reach the grouting pressure that experience (or experiment) sets, or can not reach setting pressure all the time, tends to cause the waste of great injecting paste material.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that forms slip casting space in sand ovum layer, to inject the space of slurries in wish, forms in advance artificial advantage passage, makes its size, shape controlled.
For solving the problems of the technologies described above, the method step that the present invention takes is:
(1) in the position formation boring of intending forming the underground curtain wall of water blockoff, through permeable stratum;
(2) utilize above-mentioned boring, in the position of cobble layer, be lowered to steel cage as support, steel cage is provided with bar shaped elongated slot longitudinally;
(3) at the bottom of drilling rod mounting spray head, and be lowered to cobble layer position; The nozzle direction of shower nozzle is consistent with the bar shaped elongated slot on steel cage;
(4) in drilling rod outside, be lowered to and high pressure gas carrier pipe through foot of hole;
(5) described shower nozzle is connected High-Pressure Water by drilling rod, and moves up and down drilling rod, and High-Pressure Water, by the sand pebble layer of the nozzle disturbance cutting assigned direction of shower nozzle, is flowed to foot of hole by the silt particle of disturbance under Action of Gravity Field;
(6) pressure-air of high pressure gas carrier pipe input simultaneously, pressure-air drives cement mortar ejection earth's surface from foot of hole, thereby in sandy gravel, forms default slip casting space.
In step of the present invention (2), the diameter of steel cage is between bore diameter and drill pipe diameter.
In step of the present invention (2), bar shaped elongated slot is symmetricly set on the both sides of steel cage, and the direction of bar shaped elongated slot is consistent with the direction that forms curtain wall.
The beneficial effect that adopts technique scheme to produce is: the present invention utilizes SASA, and blows out the silt particle in sand pebble layer by high pressure gas, thereby in sand ovum layer, forms default slip casting space; By the present invention, can in intend forming the stratum of underground curtain, in wish, inject the space of slurries, form in advance artificial advantage passage, make its size, shape controlled, thereby guarantee that the slurries that inject form effective underground water plugging continuous curtain in regulation space.
The present invention uses steel cage as support, has prevented the collapse hole accident easily forming in boulder bed; Use high-pressure water jet sand pebble layer, form default slip casting space; Use high pressure gas ejection cement mortar, the jet space of High-Pressure Water is expanded.This method can not form the major accident of effective water blockoff curtain wall in the time of can effectively preventing in thick boulder bed slip casting; Particularly in underground water flow field, form, in the larger situation of groundwater velocity, more effective.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is device structure schematic diagram of the present invention;
Fig. 2 is the structural representation of steel cage in the present invention.
In figure: 1, high-pressure water pipe; 2, drilling rod; 3, boring; 4, steel cage; 5, shower nozzle; 6, cobble layer; 7, permeable stratum; 8, high-pressure pump; 9, high pressure gas carrier pipe; 10, bar shaped elongated slot.
The specific embodiment
Shown in Fig. 1, in this formation sand ovum layer, the method in slip casting space adopts following concrete job step:
(1) first at the position of intending the underground curtain wall of formation water blockoff, according to the density of design and aperture, form boring 3, hole 3 through permeable stratum 7 arrival cobble layers 6;
(2) in the position of cobble layer 6, be lowered to steel cage 4, the diameter of steel cage 4, between bore diameter and drill pipe diameter, prevents collapse hole as support; Shown in Fig. 2, steel cage 4 both sides are provided with the symmetrical elongated slot of bar shaped longitudinally 10, and bar shaped elongated slot 10 directions are consistent with the direction that forms curtain wall;
(3) at the bottom of drilling rod 2 mounting spray head 5, with rig, be lowered to cobble layer position, the nozzle direction of shower nozzle 5 is consistent with the bar shaped elongated slot 10 on steel cage;
(4) in drilling rod 2 outsides, be lowered to high pressure gas carrier pipe 9, the bottom of through boring 3, high pressure gas carrier pipe 9 is communicated with high-pressure pump 8;
(5) drilling rod 2 is connected high-pressure water pipe 1, input High-Pressure Water, and High-Pressure Water enters shower nozzle 5 by drilling rod centre bore, and by the hole sand pebble layer of 3 both sides of the nozzle directive on shower nozzle 5; And slowly move up and down drilling rod 2, current are by the sand pebble layer of the nozzle disturbance cutting assigned direction of shower nozzle 5, by the silt particle of disturbance, under Action of Gravity Field, flowed to the bottom of boring 3, the cobble in high pressure nozzle dead ahead is subject to the ratio cutting of water jets under high pressure, can form a cutting groove;
(6) start high-pressure pump 8, pressure-air enters foot of hole by high pressure gas carrier pipe 9 simultaneously, the underground water of the cement mortar of foot of hole remittance is blown out to earth's surface, thereby in sandy gravel, form default slip casting space.
Claims (3)
1. a method that forms slip casting space in sand ovum layer, is characterized in that, its method step is:
(1) in the position formation boring (3) of intending forming the underground curtain wall of water blockoff, through permeable stratum (7);
(2) utilize above-mentioned boring (3), be lowered to steel cage (4) as supporting in the position of cobble layer (6), steel cage (4) is provided with bar shaped elongated slot (10) longitudinally;
(3) at the bottom mounting spray head (5) of drilling rod (2), and be lowered to cobble layer position; The nozzle direction of shower nozzle (5) is consistent with the bar shaped elongated slot (10) on steel cage;
(4) in drilling rod (2) outside, be lowered to and high pressure gas carrier pipe (9) through boring (3) bottom;
(5) described shower nozzle (5) is connected High-Pressure Water by drilling rod, and moves up and down drilling rod (2), and High-Pressure Water, by the sand pebble layer (6) of the nozzle disturbance cutting assigned direction of shower nozzle, is flowed to foot of hole by the silt particle of disturbance under Action of Gravity Field;
(6) pressure-air of high pressure gas carrier pipe (9) input simultaneously, pressure-air drives cement mortar ejection earth's surface from foot of hole, thereby in sandy gravel, forms default slip casting space.
2. a kind of method that forms slip casting space in sand ovum layer according to claim 1, is characterized in that: in described step (2), the diameter of steel cage (4) is between bore diameter and drill pipe diameter.
3. a kind of method that forms slip casting space in sand ovum layer according to claim 1 and 2, it is characterized in that: in described step (2), bar shaped elongated slot (10) is symmetricly set on the both sides of steel cage (4), and the direction of bar shaped elongated slot (10) is consistent with the direction that forms curtain wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310453723.2A CN103556645B (en) | 2013-09-29 | 2013-09-29 | Method for forming grouting space in sand gravel layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310453723.2A CN103556645B (en) | 2013-09-29 | 2013-09-29 | Method for forming grouting space in sand gravel layer |
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| CN103556645A true CN103556645A (en) | 2014-02-05 |
| CN103556645B CN103556645B (en) | 2015-06-17 |
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| CN201310453723.2A Expired - Fee Related CN103556645B (en) | 2013-09-29 | 2013-09-29 | Method for forming grouting space in sand gravel layer |
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Citations (6)
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|---|---|---|---|---|
| CN1259606A (en) * | 1999-01-01 | 2000-07-12 | 中国有色第十五冶金建设公司第一工程公司 | Deep base pit sand pebble layer casing pipe hole forming technique |
| EP1099799A2 (en) * | 1999-11-10 | 2001-05-16 | Smet-F & C | Apparatus and method for producing a high pressure grouted foundation pile |
| CN101255698A (en) * | 2008-01-23 | 2008-09-03 | 湖南省建筑工程集团总公司 | Drifting sand layer and gravel stratum water-moving double-liquid high pressure slip-casting water-blocking construction method |
| CN102261079A (en) * | 2011-04-28 | 2011-11-30 | 朱奎 | Construction method for foundation pit waterproof curtain |
| CN102995647A (en) * | 2012-12-15 | 2013-03-27 | 天津大学 | Underground water control method used for grouting and seepage insulation of pile hole |
| CN202954371U (en) * | 2012-12-14 | 2013-05-29 | 上海市建工设计研究院有限公司 | Vertical combined type seepage-proofing waterproof curtain structure |
-
2013
- 2013-09-29 CN CN201310453723.2A patent/CN103556645B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1259606A (en) * | 1999-01-01 | 2000-07-12 | 中国有色第十五冶金建设公司第一工程公司 | Deep base pit sand pebble layer casing pipe hole forming technique |
| EP1099799A2 (en) * | 1999-11-10 | 2001-05-16 | Smet-F & C | Apparatus and method for producing a high pressure grouted foundation pile |
| CN101255698A (en) * | 2008-01-23 | 2008-09-03 | 湖南省建筑工程集团总公司 | Drifting sand layer and gravel stratum water-moving double-liquid high pressure slip-casting water-blocking construction method |
| CN102261079A (en) * | 2011-04-28 | 2011-11-30 | 朱奎 | Construction method for foundation pit waterproof curtain |
| CN202954371U (en) * | 2012-12-14 | 2013-05-29 | 上海市建工设计研究院有限公司 | Vertical combined type seepage-proofing waterproof curtain structure |
| CN102995647A (en) * | 2012-12-15 | 2013-03-27 | 天津大学 | Underground water control method used for grouting and seepage insulation of pile hole |
Non-Patent Citations (2)
| Title |
|---|
| 肖云辉: "砂卵石地层钻孔灌注桩基础的施工", 《南平师专学报》 * |
| 肖德斌等: "高压喷射灌浆在治理砂卵石层中的应用", 《湖南水利水电》 * |
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