CN105155544A - Grouting construction method for radius-controllable deep holes - Google Patents
Grouting construction method for radius-controllable deep holes Download PDFInfo
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- CN105155544A CN105155544A CN201510469878.4A CN201510469878A CN105155544A CN 105155544 A CN105155544 A CN 105155544A CN 201510469878 A CN201510469878 A CN 201510469878A CN 105155544 A CN105155544 A CN 105155544A
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a grouting construction method for radius-controllable deep holes. The method includes the following steps that firstly, according to the situation of a construction site and construction requirements, parameters of the grouting holes and grouting parameters are determined; secondly, according to the parameters, acquired in the first step, of the grouting holes, the holes are distributed and a locating hole is prefabricated; thirdly, according to the grouting parameters acquired in the first step, paste is prepared, and the paste diffusion radius is controlled by adjusting the gelation time of the paste, wherein the paste is mixed paste of cement-water glass and modified water glass paste; fourthly, a locating hole segmenting broaching method is adopted for drilling the grouting holes and a backward type segmenting grouting method is adopted for deep hole grouting; and fifthly, after the grouting finish standard is reached, grouting is stopped. By the adoption of the method, the diffusion radius of the paste can be effectively controlled, a loose soil layer can be reinforced, waste of redundant paste is avoided, and the environment can be prevented from being polluted.
Description
Technical field
The present invention relates to mortar depositing construction field, specifically refer to the deep hole grouting construction that radius is controlled.
Background technology
In recent years, for adapting to the demand of future transportation and the Appropriate application of urban space, the underground construction such as subway station and running tunnel is all being built energetically in a lot of city, the whole nation.For boring construction, because its covering layer mostly is loose stratum, therefore may cause larger stratum deformation in son digging process, need formation pre-reinforcement.Deep hole grouting formation can be adopted to carry out water sealing consolidation, but due to grout spreading range uncontrolled: slurries radius is too small, and that loose soil bed may be caused to reinforce is not firm; Slurries radius is excessive, may cause the spilling of unnecessary slurries and waste raw material, and also possibility polluted-water or soil, be unfavorable for environmental protection.
Summary of the invention
The deep hole grouting construction that the object of the present invention is to provide radius controlled, utilize the setting time of modified water glass this characteristic adjustable, control grout spreading range, while reaching reinforcing loose soil bed, not only avoid the waste of unnecessary slurries, the pollution to environment can also be avoided.
The present invention is achieved through the following technical solutions: the deep hole grouting construction that radius is controlled, comprises the following steps:
Step S100: according to job site situation and construction requirement determination injected hole parameter and grouting parameter; Described injected hole parameter comprises distributing position, angle of incidence; Described grouting parameter comprises grout spreading range, grouting amount, injection speed, grouting pressure, slip casting section length;
Step S200: according to the hole arranged position of injected hole parameter in described step S100, and preset locating hole; Specifically to refer to that within the scope of 150 °, arch hoop arranges injected hole, and with locating hole, the distributing position of injected hole, angle of incidence are marked in allowable variation;
Step S300: according to the grouting parameter configuration slurries in described step S100, control grout spreading range by regulating the gel time of slurries; Described slurries are the mixed serum of the two slurries of cement-sodium silicate and Modified Silicate Sodium Grout;
Step S400: adopt locating hole merogenesis reaming method to carry out injected hole and drill through, and adopt retrusive segmenting slip casting method to carry out deep hole grouting;
Step S500: after reaching slip casting ending standard, stops slip casting.
The present invention is applicable to the loose soil bed strengthening construction in the underground construction tunneling processes such as each subway station and running tunnel, utilize the setting time of modified water glass this characteristic adjustable, control grout spreading range, while reaching reinforcing loose soil bed, not only avoid the waste of unnecessary slurries, the pollution to environment can also be avoided.
Described step S200 is for laying injected hole operation.Described injected hole generally takes rectangular cloth hole or blossom type cloth hole, preferred blossom type cloth hole.Important construction of tunnel, excavation contour line at least lays two circles or two row's injected holes outward.
Described step S300 is the operation of preparation slurries.The preparation of slurries mainly adjusts according to job site situation and the determined grouting parameter of construction requirement, and the two slurries of cement-sodium silicate are mainly used in reinforcing, and Modified Silicate Sodium Grout is mainly used in sealing.By the adjustment proportioning of Modified Silicate Sodium Grout and the gel time of adjustable slurries, thus effectively control grout spreading range.
If grout spreading range is R, slip casting section length is L, and slurries are V in the diffusion velocity of this section, then the setting time of slurries is t, t=(L+R)/V.Then adjusted Baume degrees and the pH value of slurries by the proportioning of adjustment Modified Silicate Sodium Grout, thus realize the control of grout spreading range R.
Described step S400 is boring, grouting with plunger.Drilling operating adopts first prefabricated locating hole, processes acquisition injected hole in the mode of use auger to the coaxial reaming of locating hole.In order to coordinate retrusive segmenting slip casting operation, adopt merogenesis reaming method, often saving length is 1 ~ 2m.Auger preferred TXU-75A type auger.
Grouting with plunger adopts retrusive segmenting slip casting method, during construction, first stop grouting plug and other corollary apparatus is put into grouting pipe, carries out slip casting successively according to order from bottom to top to single slip casting section length, until complete whole grouting with plunger.Adopt segmenting slip casting method to carry out slip casting, the length of general segmenting slip casting is 0.6 ~ 3.0m.Described retrusive segmenting slip casting method comprises mini-valve tube retrusive segmenting slip casting and TSS pipe retrusive segmenting slip casting.
Further, the two slurries of the cement-sodium silicate in described step S300 are that A liquid and C liquid are prepared for 1:1 ~ 0.6 by volume, the mixture mixed respectively by Double-liquid mud-injection pump pressure injection and in the aperture of injected hole; Described Modified Silicate Sodium Grout is the mixture that A liquid injects B liquid gained; Described A liquid is that the water glass that silicate of soda mixes with water is starched, and B liquid is the modification slurry of curing compound, ethylene glycol, water mixing, and C liquid is the cement paste of cement, Admixture, water mixing.Described Double-liquid mud-injection pump preferred YZB-50/70 type double-fluid grouting machine.
Further, described curing compound is the phosphoric acid of technical grade.
Further, the concrete preparation process of described Modified Silicate Sodium Grout is: first adopt silicate of soda to mix to prepare A liquid for 1:1.2 ~ 1.5 in mass ratio with water, again phosphoric acid, ethylene glycol, water are uniformly mixed to prepare B liquid for 1:0.4 ~ 0.6:8 ~ 9 in mass ratio, then the A liquid of preparation slowly injected B liquid and constantly stir, finally by regulating the volume ratio of A liquid and B liquid to regulate the Baume degrees of Modified Silicate Sodium Grout and pH value, and then realize the adjustment to its gel time of slurries.
Further, described Admixture is the sodium hydrogen phosphate of technical grade.
Further, the concrete preparation process of the two slurries of described cement-sodium silicate is: first adopt silicate of soda to mix to prepare A liquid for 1:1.2 ~ 1.5 in mass ratio with water, then is that 1.3 ~ 1.5:0.75 ~ 0.85:1 is added into mixing plant successively and carries out being uniformly mixed to prepare C liquid in mass ratio by water, sodium hydrogen phosphate, cement.
Further, its position deviation of injected hole of described step S100 specifically specific bit hole and design is not more than 2cm; The deviation of the angle of incidence of locating hole and its angle of incidence of injected hole of design is less than 1 °.
Described angle of incidence is 9 ° ~ 16 °.
Further, described step S400 specifically comprises the following steps:
Step S410: adopt auger to carry out coaxial ream operation to locating hole, then grouting pipe is set;
Step S420: the drilling rod of pumpback auger, first injects the Modified Silicate Sodium Grout for preparing to slip casting ending standard by grouting pipe, and then adds and inject the two slurries of cement-sodium silicate;
Step S430: constantly whether the grouting amount of observation Modified Silicate Sodium Grout, the grouting amount of the two slurries of cement-sodium silicate and grouting pressure reach slip casting ending standard.
Further, described slip casting ending standard specifically refers to that every root grouting pipe all injects the grouting amount of setting and grouting pressure reaches final grouting pressure.
Further, described final grouting pressure is not more than 2MPa.
When Modified Silicate Sodium Grout reaches precalculated position and after consolidation, final grouting pressure is generally not more than 2MPa.If grouting pressure does not rise for a long time, grouting amount, without significant change, may be running pulp phenomenon, adopts interval slip casting.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention effectively can control grout spreading range, under the prerequisite guaranteeing fastening strength, can avoid the unnecessary waste of slurries, increase economic efficiency;
(2) present invention reduces soil layer consolidation time, for ensureing that the duration provides advantage;
(3) present invention, avoiding unnecessary slurries and flow into lithic drainage along soil layer space, reduce the pollution to underground water or soil.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1:
The deep hole grouting construction that the radius of the present embodiment is controlled, as shown in Figure 1, is mainly achieved through the following technical solutions: the deep hole grouting construction that radius is controlled, comprises the following steps:
Step S100: according to job site situation and construction requirement determination injected hole parameter and grouting parameter; Described injected hole parameter comprises distributing position, angle of incidence; Described grouting parameter comprises grout spreading range, grouting amount, injection speed, grouting pressure, slip casting section length;
Step S200: according to the hole arranged position of injected hole parameter in described step S100, and preset locating hole; Specifically to refer to that within the scope of 150 °, arch hoop arranges injected hole, and with locating hole, the distributing position of injected hole, angle of incidence are marked in allowable variation;
Step S300: according to the grouting parameter configuration slurries in described step S100, control grout spreading range by regulating the gel time of slurries; Described slurries are the mixed serum of the two slurries of cement-sodium silicate and Modified Silicate Sodium Grout;
Step S400: adopt locating hole merogenesis reaming method to carry out injected hole and drill through, and adopt retrusive segmenting slip casting method to carry out deep hole grouting;
Step S500: after reaching slip casting ending standard, stops slip casting.
Embodiment 2:
The present embodiment does further optimization on above-described embodiment basis, further, the two slurries of cement-sodium silicate in described step S300 are that A liquid and C liquid are prepared for 1:1 ~ 0.6 by volume, the mixture mixed respectively by Double-liquid mud-injection pump pressure injection and in the aperture of injected hole; Described Modified Silicate Sodium Grout is the mixture that A liquid injects B liquid gained; Described A liquid is that the water glass that silicate of soda mixes with water is starched, and B liquid is the modification slurry of curing compound, ethylene glycol, water mixing, and C liquid is the cement paste of cement, Admixture, water mixing.
Other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 3:
The present embodiment does further optimization on above-described embodiment basis, and described curing compound is the phosphoric acid of technical grade; The concrete preparation process of described Modified Silicate Sodium Grout is: first adopt silicate of soda to mix to prepare A liquid for 1:1.2 ~ 1.5 in mass ratio with water, again phosphoric acid, ethylene glycol, water are uniformly mixed to prepare B liquid for 1:0.4 ~ 0.6:8 ~ 9 in mass ratio, then the A liquid of preparation slowly injected B liquid and constantly stir, finally by regulating the volume ratio of A liquid and B liquid to regulate the Baume degrees of Modified Silicate Sodium Grout and pH value, and then realize the adjustment to its gel time of slurries.
Other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 4:
The present embodiment does further optimization on above-described embodiment basis, further, the concrete preparation process of described Modified Silicate Sodium Grout is: first adopt silicate of soda with water in mass ratio for 411:567.7 mixes to prepare A liquid, again by phosphoric acid, ethylene glycol, water in mass ratio for 64.5:32.3:548.6 is uniformly mixed to prepare B liquid, then the A liquid of preparation slowly injected B liquid and constantly stir, finally by regulating the volume ratio of A liquid and B liquid to regulate the Baume degrees of Modified Silicate Sodium Grout and pH value, and then realize the adjustment to its gel time of slurries.Other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 5:
The present embodiment does further optimization on above-described embodiment basis, and described Admixture is the sodium hydrogen phosphate of technical grade; The concrete preparation process of the two slurries of described cement-sodium silicate is: first adopt silicate of soda with water in mass ratio for 411:567.7 mixes to prepare A liquid, then water, sodium hydrogen phosphate, cement is carried out being uniformly mixed to prepare C liquid for 198:157:282.9 is added into mixing plant successively in mass ratio.Other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 6:
The present embodiment does further optimization on above-described embodiment basis, and further, described step S400 specifically comprises the following steps:
Step S410: adopt auger to carry out coaxial ream operation to locating hole, then grouting pipe is set;
Step S420: the drilling rod of pumpback auger, first injects the Modified Silicate Sodium Grout for preparing to slip casting ending standard by grouting pipe, and then adds and inject the two slurries of cement-sodium silicate;
Step S430: constantly whether the grouting amount of observation Modified Silicate Sodium Grout, the grouting amount of the two slurries of cement-sodium silicate and grouting pressure reach slip casting ending standard.
Other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
Embodiment 7:
The present embodiment does further optimization on above-described embodiment basis, and further, described step S400 specifically comprises the following steps:
Step S410: adopt auger to carry out coaxial ream operation to locating hole, then grouting pipe is set;
Step S420: the drilling rod of pumpback auger, first injects the Modified Silicate Sodium Grout for preparing to slip casting ending standard by grouting pipe, and then adds and inject the two slurries of cement-sodium silicate;
Step S430: constantly whether the grouting amount of observation Modified Silicate Sodium Grout, the grouting amount of the two slurries of cement-sodium silicate and grouting pressure reach slip casting ending standard; Described slip casting ending standard specifically refers to that every root grouting pipe all injects the grouting amount of setting and grouting pressure reaches final grouting pressure.
Other parts of the present embodiment are same as the previously described embodiments, therefore repeat no more.
The above is only preferred embodiment of the present invention, and not do any pro forma restriction to the present invention, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present invention, all falls within protection scope of the present invention.
Claims (10)
1. the deep hole grouting construction that radius is controlled, is characterized in that comprising the following steps:
Step S100: according to job site situation and construction requirement determination injected hole parameter and grouting parameter; Described injected hole parameter comprises distributing position, angle of incidence; Described grouting parameter comprises grout spreading range, grouting amount, injection speed, grouting pressure, slip casting section length;
Step S200: according to the hole arranged position of injected hole parameter in described step S100, and preset locating hole; Specifically to refer to that within the scope of 150 °, arch hoop arranges injected hole, and with locating hole, the distributing position of injected hole, angle of incidence are marked in allowable variation;
Step S300: according to the grouting parameter configuration slurries in described step S100, control grout spreading range by regulating the gel time of slurries; Described slurries are the mixed serum of the two slurries of cement-sodium silicate and Modified Silicate Sodium Grout;
Step S400: adopt locating hole merogenesis reaming method to carry out injected hole and drill through, and adopt retrusive segmenting slip casting method to carry out deep hole grouting;
Step S500: after reaching slip casting ending standard, stops slip casting.
2. the deep hole grouting construction that radius according to claim 1 is controlled, it is characterized in that: the two slurries of the cement-sodium silicate in described step S300 are that A liquid and C liquid are prepared for 1:1 ~ 0.6 by volume, the mixture mixed respectively by Double-liquid mud-injection pump pressure injection and in the aperture of injected hole; Described Modified Silicate Sodium Grout is the mixture that A liquid injects B liquid gained; Described A liquid is that the water glass that silicate of soda mixes with water is starched, and B liquid is the modification slurry of curing compound, ethylene glycol, water mixing, and C liquid is the cement paste of cement, Admixture, water mixing.
3. the deep hole grouting construction that radius according to claim 2 is controlled, is characterized in that: described curing compound is the phosphoric acid of technical grade.
4. the deep hole grouting construction that radius according to claim 3 is controlled, it is characterized in that: the concrete preparation process of described Modified Silicate Sodium Grout is: first adopt silicate of soda to mix to prepare A liquid for 1:1.2 ~ 1.5 in mass ratio with water, again by phosphoric acid, ethylene glycol, water is uniformly mixed to prepare B liquid for 1:0.4 ~ 0.6:8 ~ 9 in mass ratio, then the A liquid of preparation slowly injected B liquid and constantly stir, finally by regulating the volume ratio of A liquid and B liquid, the Baume degrees of Modified Silicate Sodium Grout and pH value are regulated, and then the adjustment realized its gel time of slurries.
5. the deep hole grouting construction that the radius according to claim 2-4 any one is controlled, is characterized in that: described Admixture is the sodium hydrogen phosphate of technical grade.
6. the deep hole grouting construction that radius according to claim 5 is controlled, it is characterized in that: the concrete preparation process of the two slurries of described cement-sodium silicate is: first adopt silicate of soda to mix to prepare A liquid for 1:1.2 ~ 1.5 in mass ratio with water, then be that 1.3 ~ 1.5:0.75 ~ 0.85:1 is added into mixing plant successively and carries out being uniformly mixed to prepare C liquid in mass ratio by water, sodium hydrogen phosphate, cement.
7. the deep hole grouting construction that radius according to claim 1 is controlled, is characterized in that: its position deviation of injected hole of described step S100 specifically specific bit hole and design is not more than 2cm; The deviation of the angle of incidence of locating hole and its angle of incidence of injected hole of design is less than 1 °.
8. the deep hole grouting construction that radius according to claim 1 is controlled, is characterized in that: described step S400 specifically comprises the following steps:
Step S410: adopt auger to carry out coaxial ream operation to locating hole, then grouting pipe is set;
Step S420: the drilling rod of pumpback auger, first injects the Modified Silicate Sodium Grout for preparing to slip casting ending standard by grouting pipe, and then adds and inject the two slurries of cement-sodium silicate;
Step S430: constantly whether the grouting amount of observation Modified Silicate Sodium Grout, the grouting amount of the two slurries of cement-sodium silicate and grouting pressure reach slip casting ending standard.
9. the deep hole grouting construction that radius according to claim 8 is controlled, is characterized in that: described slip casting ending standard specifically refers to that every root grouting pipe all injects the grouting amount of setting and grouting pressure reaches final grouting pressure.
10. the deep hole grouting construction that radius according to claim 9 is controlled, is characterized in that: described final grouting pressure is not more than 2MPa.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107859028A (en) * | 2017-10-20 | 2018-03-30 | 中国化学工程第岩土工程有限公司 | A kind of diplopore two fluid grouting method |
| CN109653190A (en) * | 2018-12-11 | 2019-04-19 | 宝钢集团新疆八钢铁有限公司 | A kind of large-scale heavy duty Equipment Foundations grouting and consolidation on foundation technique |
| CN109881696A (en) * | 2019-01-31 | 2019-06-14 | 北京地矿工程建设有限责任公司 | A kind of HPPG back cover construction method |
| CN111894632A (en) * | 2020-08-03 | 2020-11-06 | 平顶山天安煤业股份有限公司 | Coal rock mass deep hole sectional grouting reinforcement device and reinforcement method |
| CN112052505A (en) * | 2020-09-07 | 2020-12-08 | 中南大学 | Design method for grouting hole distance of cement-water glass double-liquid slurry |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859028A (en) * | 2017-10-20 | 2018-03-30 | 中国化学工程第岩土工程有限公司 | A kind of diplopore two fluid grouting method |
| CN107859028B (en) * | 2017-10-20 | 2020-04-21 | 中国化学工程第一岩土工程有限公司 | Double-hole double-liquid grouting method |
| CN109653190A (en) * | 2018-12-11 | 2019-04-19 | 宝钢集团新疆八钢铁有限公司 | A kind of large-scale heavy duty Equipment Foundations grouting and consolidation on foundation technique |
| CN109881696A (en) * | 2019-01-31 | 2019-06-14 | 北京地矿工程建设有限责任公司 | A kind of HPPG back cover construction method |
| CN111894632A (en) * | 2020-08-03 | 2020-11-06 | 平顶山天安煤业股份有限公司 | Coal rock mass deep hole sectional grouting reinforcement device and reinforcement method |
| CN112052505A (en) * | 2020-09-07 | 2020-12-08 | 中南大学 | Design method for grouting hole distance of cement-water glass double-liquid slurry |
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