CN104328781A - Unfavorable geologic body controlling infiltration chemical grouting method - Google Patents
Unfavorable geologic body controlling infiltration chemical grouting method Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The invention discloses an unfavorable geologic body controlling infiltration chemical grouting method, which mainly aims at the common technical problem that grouting can be ineffective due to the out-of-control diffusion of grout caused by the local cleavage of low-stress surfaces when chemical grout is adopted for seepage prevention and reinforcement for an unfavorable geologic body. The small-section-length controlling infiltration grouting method invented by research is characterized in that (1) double-plug small-section-length top-down closing of sections; (2) linear control of the steady grouting rate; (3) setting of a grouting completion standard. The unfavorable geologic body controlling infiltration chemical grouting method is applicable to the seepage prevention and reinforcement of unfavorable geologic bodies or other unfavorable structural bodies by adopting chemical grout.
Description
Technical field
A kind of unfavorable geologic body controlling of the present invention oozes profit chemical grouting method, when adopting chemical grout to carry out antiseepage and consolidation process mainly for unfavorable geologic body, the little stress plane local splitting of ubiquity produces the technical problems such as slurries diffusion invalid perfusion out of control, the little segment length of the two plug of one of research invention closes up and down, permanent steady small injection rate controlling oozes profit method for filling, is applicable to adopt chemical grout to carry out antiseepage and consolidation process to unfavorable geologic body or other Poor structure bodies.
Background technology
Left dam abutment compressive zone clastic unfavorable geologic body, as Xiangjiabahydropower project Main Engineering Geological Problems, has successively been carried out the curtain grouting of many rows cement grouting material and cement grouting material and chemical grouting material composite reinforcing during engineering construction and has been in the milk.But inspection eye boring finds, the compressive zone core major part of taking-up is still in loose sand shape.Along with Xiangjiaba Dam impounding and operation, under high water head effect, the seepage stability of left bank compressive zone is always by hydroelectric project brainstrust is worried.To this, for guaranteeing that long-term seepage is stablized under compressive zone clastic unfavorable geologic body high water head service condition, according to the suggestion of hydroelectric project brainstrust, be necessary in conjunction with left bank compressive zone unfavorable geologic body architectural characteristic, and many technical problems that early stage adopts conventional chemical grouting treatment to exist, carry out the Chemical Grouting Treatment method that compressive zone unfavorable geologic body is new further, to obtain the better grouting treatment effect of comparatively conventional chemical grouting method.
Be similar to the chemical grouting method of Burner zone left bank compressive zone unfavorable geologic body or structure employing routine, ubiquity drilled grout hole pore-forming difficulty, lower plug segmentation is closed and cannot be implemented, little stress plane local splitting of being in the milk produces many technical problems such as slurries diffusion invalid perfusion out of control, the first cementation of many employings at present, then carry out chemical grouting, i.e. so-called cement-Chemical Compound Grouting, wherein the many employings of chemical grouting are holed from top to bottom, singly fill in packer grouting, every section of grouting is all issued to certain injection rate to control ending standard according to the maximum grouting pressure in design.
Summary of the invention
The present invention aims to provide a kind of unfavorable geologic body controlling and oozes profit chemical grouting method, this grouting method is when adopting chemical grout to carry out antiseepage and consolidation process for unfavorable geologic body, the little stress plane local splitting of ubiquity produces the technical problems such as slurries diffusion invalid perfusion out of control, the little segment length of the two plug of one of research invention closes up and down, permanent steady small injection rate controlling oozes profit method for filling, is applicable to adopt chemical grout to carry out antiseepage and consolidation process to unfavorable geologic body or other Poor structure bodies.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of unfavorable geologic body controlling oozes profit chemical grouting method, comprises the steps:
1) grout hole boring is in the milk with solid hole, after forming closely knit complete chemical grouting hole section, carries out boring video recording and packer permeability test inspection, confirms solid hole grouting effect;
2) enter Hydraulic Double embolism under in grout hole, according to grouting striping order, the little segment length of two plug is carried out to grout hole section and close up and down;
3) before filling with according to grout hole section, permeability rate q calculates Heng Wen unit injection rate W value; Regulate and control and keep Heng Wen unit injection rate W value to carry out chemical grout controlling and ooze profit perfusion, Heng Wen unit injection rate W value control deviation is less than 10%; Steady unit injection rate W and its regulation and control pressure P is kept to be linear relationship in filling process;
4) in filling process according to chemical grout gel time, the bottom embolism in good time shrinking two embolism is removed to close and is newly starched displacement to carry out chemistry;
5) when the amount of pouring into reaches setting unit grout consumption G, the grouting of this grout compartment is terminated;
6) according to grouting striping order, step 2 is repeated)-5), carry out the little segment length of two plug to all the other grout compartments successively and close up and down, permanent steady small injection rate W controlling oozes profit perfusion, until the perfusion of complete opening section terminates.
Be below the preferred technical scheme of the present invention:
Step 1) in, described in carry out boring video recording and packer permeability test inspection, confirm that solid hole grouting effect refers to that grout hole sector hole wall is complete, stable, permeability rate close to or be less than 1.0Lu.
Step 2) in, the little segment length of described two plug closes up and down, refers to closed segment length≤0.5m.
Step 2) in, for the grout hole having water in hole, before segmentation closed by two plug, adopt chemical grout to carry out pulp-water displacement in grouting pipeline and grout compartment.
Step 2) in, described grouting striping order adopts from top to bottom or contiguous segmentation carries out from bottom to top, or adopts space segmentation or from bottom to top to carry out from top to bottom, pours between grout hole by II sequence or point sequence encryption of III sequence hole.
Step 3) in, described Heng Wen unit injection rate W=Kq;
In formula: W-Heng Wen unit injection rate, unit (L/min.m);
K-grout compartment Rock-mass integrity index, K value 0.3 ~ 0.7;
Permeability rate before q-grout compartment chemical grouting, q=Q/ (pL), unit Lu;
Q-packer permeability test flow, unit L/min;
P-packer permeability test pressure, units MPa;
L-packer permeability test segment length, unit m.
Step 4) in, described setting unit grout consumption G=100K π D
2lq
In formula: G-setting unit grout consumption, unit L/m;
K-chemical grouting section Rock-mass integrity index, K value 0.3 ~ 0.7;
L-grouting segment length, unit m;
D-grout hole spacing, unit m;
Permeability rate before q-chemical grouting, unit Lu.
Pump amount≤the 1.0L/min of the grout pump adopted during described chemical grouting, pump pressure >=10MPa.
Described chemical grouting grouting agent used is that modified epoxy slurries or acrylate grout or other gel times are greater than 2h and adjustable chemical grouting slurries used.
Step 1) in, described grout hole boring is in the milk with solid hole and is adopted from top to bottom, bore and fill with one, high pressure impact extrusion grouting method carries out, other can certainly be adopted effectively to consolidate hole grouting method carry out, grouting slurries adopt cement grout, and other certainly can also be adopted to meet the cheap slurries for consolidation by grouting of grouting body requirement of strength.
Step 6) after the chemical grouting of complete opening section terminates, adopt cement underflow to carry out complete opening backfill grouting.
Step 3) in, in filling process, the real-time monitored grouting that also record and Heng Wen unit injection rate W match regulates and controls pressure P, carry out Heng Wen unit injection rate W to judge with regulation and control pressure P linear relationship, once occur that the linear relationships such as abrupt pressure reduction are abnormal, timely correction Heng Wen unit injection rate W value, guarantees steady unit injection rate W and its regulation and control pressure P retention wire sexual intercourse.
Described Hydraulic Double embolism is that a kind of upper and lower embolism collapses the Hydraulic Double embolism that can independently carry out controlling, and this Hydraulic Double embolism comprises grout pipe, the floral tube be communicated with grout pipe, is sleeved on the upper embolism on floral tube and lower embolism; Described upper embolism and lower embolism all have hydraulic cavities; It is characterized in that, the hydraulic cavities of described upper embolism is communicated with top plug hydraulic tube, and the hydraulic cavities of lower embolism is communicated with lower embolism hydraulic tube, and the hydraulic cavities of described upper embolism is not communicated with the hydraulic cavities of lower embolism.Thus, described upper embolism and lower embolism collapse complete independent operation, can be used as and adopt two plug to close packer grouting method to carry out Foundation Anti-seepage or consolidation process cement or certain special chemical preparation Hydraulic Double embolism.When adopting two plug segmentation closure grouting method to be in the milk, on maintenance Hydraulic Double embolism under embolism sealing condition, shrinking to remove to close to lower embolism pressure release in good time and newly starching displacement, prevent long-time reperfusion serosity from solidifying or gel causes lower embolism consolidation.
Further, be provided with seal nipple between described grout pipe and floral tube, described lower plug hydraulic tube is introduced in described floral tube by mechanical seal, and is drawn through seal nipple by mechanical seal.
In sum, a kind of unfavorable geologic body controlling of the present invention oozes the Heng Wen unit injection rate chemical grouting control technology that profit chemical grouting method adopts, be different from completely in existing chemical grouting specification and adopt design maximum grouting pressure control technology, but control according to calculating the Heng Wen unit injection rate W value determined, real-time monitored in filling process also records the grouting pressure P that Heng Wen unit injection rate W with it matches, draw P-W duration curve, carry out Heng Wen unit injection rate to judge with the sexual intercourse of regulation and control pressure line, once occur that the linear relationships such as abrupt pressure reduction are abnormal, timely correction Heng Wen unit injection rate W value, guarantee that steady unit injection rate W and its regulation and control pressure P keep certain linear relationship.
Compared with prior art, the invention has the beneficial effects as follows: a kind of unfavorable geologic body controlling disclosed by the invention oozes profit chemical grouting method, little segment length closes up and down, permanent steady small injection rate controlling oozes profit method for filling to adopt a kind of pair to fill in, and solves many technical problems that conventional chemical grouting treatment unfavorable geologic body exists preferably.
A kind of unfavorable geologic body controlling disclosed by the invention oozes profit chemical grouting method, by showing Burner zone left bank compressive zone clastic unfavorable geologic body grouting treatment industrial experimentation and application result, it is shaping that the compressive zone core that takes out of inspection eye boring is evenly oozed profit consolidation by chemical grout completely, and cement-grouting consolidation body all technical is obviously better than conventional chemical grouting method.
Accompanying drawing explanation
Fig. 1 is the process chart of one embodiment of the invention;
Fig. 2 is after adopting the present invention to carry out oozing profit chemical grouting method, the typical core master drawing that inspection eye takes out;
Fig. 3 is the structural representation of of the present invention pair of embolism.
Detailed description of the invention
1. equipment, facility and chemical grouting material
(1) unfavorable geologic body controlling oozes the miniature electric chemical grouting pump that profit chemical grouting method chemical grouting pump used can adopt market to sell, and important technological parameters is: 1. pump amount :≤1.0L/min; 2. pump pressure: >=10MPa;
(2) unfavorable geologic body controlling is oozed profit chemical grouting method little segment length's closure bolt plug used and is adopted a Hydraulic Double embolism, and requires that upper and lower embolism collapses and independently control.For the Deep hole chemical grouting more than 50m hole depth, require that the overall strengths in tension and compression of embolism is high.
(3) unfavorable geologic body controlling is oozed profit chemical grouting method chemical grouting material used and is required can select modified epoxy slurries or an acrylate grout respectively according to grouting object, and other gel times are greater than 2h and adjustable chemical grouting slurries.
2. technological process
A kind of unfavorable geologic body controlling oozes the technological process of profit chemical grouting method as shown in Figure 1.
3. grout hole boring is in the milk with solid hole
(1) grout hole boring is in the milk with solid hole and should be preferentially adopted " from top to bottom, bore and fill with one, high pressure impact extrusion " grouting method (this technique patent applied for, the patent No. is 201210348150.2, and approved is water conservancy and hydropower industry engineering method, engineering method is numbered SDGF1039-2014), also other can be adopted effectively to consolidate hole grouting method, mainly solve unfavorable geologic body or structure borehole collapse, the problems such as water burst, improve unfavorable geology or structure density and homogeneity further, and mould one complete, smooth, stable grout hole section, ooze profit chemical grouting method for a kind of unfavorable geologic body controlling disclosed by the invention to carry out two plug segment and to close and technological parameter is normally implemented to create conditions.
(2) grout hole boring and solid hole be in the milk slurries used can adopt cement grout or other meet the cheap slurries for consolidation by grouting of body requirement of strength of being in the milk.
(3), after have been in the milk in boring and solid hole, video recording, hydraulic discharge observation and packer permeability test in boring cleaning bottom of hole, hole has been carried out.After confirming chemical grouting aperture solid hole grouting treatment, hole wall is complete, stable, substantially without water burst, packer permeability test permeability rate close to or be less than 1.0Lu, can think that boring solid hole grouting effect meets a kind of unfavorable geologic body controlling disclosed by the invention and oozes the little segment length of the two plug of profit chemical grouting method and close up and down and the normal urban d evelopment of technological parameter.
4. controlling oozes profit chemical grouting
(1) enter Hydraulic Double embolism under in grout hole, carry out the little segment length of two plug according to grouting striping order to grout hole section and close up and down, two plug is closed segment length and is generally advisable to be not more than 0.5m; Two plug segmentation closure grouting order can adopt from top to bottom or contiguous segmentation carries out from bottom to top; Also can to adopt from top to bottom or space segmentation is carried out from bottom to top, can pour into by II sequence or point sequence encryption of III sequence hole between grout hole.For the grout hole having water in hole, before the little segment length of two plug closes segmentation up and down, chemical grout is adopted to carry out pulp-water displacement in grouting pipeline and grout compartment.
As shown in Figure 3, described Hydraulic Double embolism is that a kind of upper and lower embolism collapses the Hydraulic Double embolism that can independently carry out controlling, and comprises grout pipe 2, seal nipple 3 and floral tube 6 that serial connection is connected; Described floral tube 6 is set with the upper embolism 5 and lower embolism 7 with hydraulic cavities, and adopts top plug hydraulic tube 1 and lower plug hydraulic tube 4 to be connected to embolism 5 and lower embolism 7, realize upper and lower embolism utricule hydraulic pressure thus and collapse complete independent operation.Described hydraulic tube internal diameter is 3-5mm, and wall thickness 2-3mm can bear more than hydraulic pressure 10MPa.Described lower plug hydraulic tube 4 is introduced in grouting floral tube 6 by mechanical seal, then is drawn through grouted pipe coupler 3 by mechanical seal.
(2) before filling with according to grout hole section, permeability rate q calculates Heng Wen unit injection rate W value.
Heng Wen unit injection rate W=Kq
In formula: W-Heng Wen unit injection rate, unit (L/min.m);
K-grout compartment Rock-mass integrity index, K value 0.3 ~ 0.7;
Permeability rate before q-grout compartment chemical grouting, q=Q/ (pL), unit Lu;
Q-packer permeability test flow, unit L/min;
P-packer permeability test pressure, units MPa;
L-packer permeability test segment length, unit m.
(3), after confirming that the little segment length of two plug has closed up and down, regulate and control and keeps Heng Wen unit injection rate W value to carry out chemical grout controlling to ooze to moisten and pour into, Heng Wen unit injection rate W value control deviation should be less than ± and 10%.Real-time monitored in filling process also records the grouting pressure P that Heng Wen unit injection rate W with it matches, draw P-W duration curve, carry out Heng Wen unit injection rate to judge with the sexual intercourse of regulation and control pressure line, once occur that the linear relationships such as abrupt pressure reduction are abnormal, timely correction Heng Wen unit injection rate W value, guarantees that steady unit injection rate W and its regulation and control pressure P keep certain linear relationship.
(4) in filling process according to chemical grout gel time, shrink to remove to close to the embolism pressure release of Hydraulic Double embolism bottom in good time and carry out chemistry and newly starch displacement, prevent pouring into chemical grout gel for a long time and cause bottom embolism glue solid.
(5) when the amount of pouring into reaches setting unit grout consumption G, the grouting of this grout compartment is terminated; Before the chemical grouting of setting unit grout consumption size Main Basis, rock mass porosity and the analytical calculation of chemical grouting pitch of holes are determined, scene can calculate as follows according to packer permeability test permeability rate before chemical grouting and grout hole spacing to be determined:
Setting unit grout consumption G=100 π D
2lq
In formula: G-unit grout consumption, unit L/m;
K-chemical grouting section Rock-mass integrity index, K value 0.3 ~ 0.7;
L-grouting segment length, unit m;
D-grout hole spacing, unit m;
Permeability rate before q-chemical grouting, unit Lu.
(6) according to grouting striping order, step 2 is repeated)-5), successively to all the other grout compartments, carry out two plug segment and close up and down, permanent steady small injection rate controlling oozes profit perfusion, until the perfusion of complete opening section terminates.
5. grouting terminates sealing of hole
After the grouting of chemical grouting complete opening section terminates, adopt 0.5:1 cement underflow to carry out the backfill grouting of complete opening machinery, have artesian water grouting sealing of hole should carry out screen slurry and close slurry.
In sum, a kind of unfavorable geologic body controlling disclosed by the invention oozes profit chemical grouting method, little segment length closes up and down, permanent steady small injection rate controlling oozes profit method for filling to adopt a kind of pair to fill in, and solves many technical problems that above-mentioned conventional chemical grouting treatment compressive zone unfavorable geologic body exists preferably.As Fig. 2 a) ~ f) shown in core figure, field trial and application result show, adopt a kind of unfavorable geologic body controlling disclosed by the invention to ooze profit chemical grouting method and carry out Burner zone left bank compressive zone clastic unfavorable geologic body grouting treatment, it is shaping that the core that inspection eye takes out is oozed profit consolidation by chemical grout completely, and its grouting treatment successful is better than conventional Chemical Grouting Treatment effect.
The content that above-described embodiment is illustrated should be understood to these embodiments only for being illustrated more clearly in the present invention, and be not used in and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Claims (13)
1. unfavorable geologic body controlling oozes a profit chemical grouting method, it is characterized in that, comprises the steps:
1) grout hole boring is in the milk with solid hole, after forming closely knit complete chemical grouting hole section, carries out boring video recording and packer permeability test inspection, confirms solid hole grouting effect;
2) enter Hydraulic Double embolism under in grout hole, according to grouting striping order, the little segment length of two plug is carried out to grout hole section and close up and down;
3) before filling with according to grout hole section, permeability rate q calculates Heng Wen unit injection rate W value; Regulate and control and keep Heng Wen unit injection rate W value to carry out chemical grout controlling and ooze profit perfusion, Heng Wen unit injection rate W value control deviation is less than 10%; Steady unit injection rate W and its regulation and control pressure P is kept to be linear relationship in filling process;
4) in filling process according to chemical grout gel time, the bottom embolism in good time shrinking two embolism is removed to close and is newly starched displacement to carry out chemistry;
5) when the amount of pouring into reaches setting unit grout consumption G, the grouting of this grout compartment is terminated;
6) according to grouting striping order, step 2 is repeated)-5), carry out the little segment length of two plug to all the other grout compartments successively and close up and down, permanent steady small injection rate controlling oozes profit perfusion, until the perfusion of complete opening section terminates.
2. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 1) in, described in carry out boring video recording with packer permeability test inspection, confirm that solid hole grouting effect refers to that grout hole sector hole wall is complete, stable, permeability rate is close or be less than 1.0Lu.
3. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 2) in, the little segment length of described two plug closes up and down, refers to closed segment length≤0.5m.
4. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 2) in, for the grout hole having water in hole, before segmentation closed by two plug, chemical grout is adopted to carry out pulp-water displacement in grouting pipeline and grout compartment.
5. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 2) in, described grouting striping order adopts from top to bottom or contiguous segmentation carries out from bottom to top, or adopt space segmentation or from bottom to top to carry out from top to bottom, pour into by II sequence or point sequence encryption of III sequence hole between grout hole.
6. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 3) in, described Heng Wen unit injection rate W=Kq;
In formula: W-Heng Wen unit injection rate, unit (L/min.m);
K-grout compartment Rock-mass integrity index, K value 0.3 ~ 0.7;
Permeability rate before q-grout compartment chemical grouting, q=Q/ (pL), unit Lu;
Q-packer permeability test flow, unit L/min;
P-packer permeability test pressure, units MPa;
L-packer permeability test segment length, unit m.
7. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 4) in, described setting unit grout consumption G=100K π D
2lq
In formula: G-setting unit grout consumption, unit L/m;
K-grout compartment Rock-mass integrity index, K value 0.3 ~ 0.7;
L-grouting segment length, unit m;
D-grout hole spacing, unit m;
Permeability rate before q-chemical grouting, unit Lu.
8. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, the pump amount≤1.0L/min of the grout pump adopted during described chemical grouting, pump pressure >=10MPa.
9. a kind of unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, described chemical grouting grouting agent used is that modified epoxy slurries or acrylate grout or other gel times are greater than 2h and adjustable chemical grouting slurries used.
10. unfavorable geologic body controlling according to claim 1 oozes profit chemical grouting method, it is characterized in that, step 1) in, grout hole boring is in the milk with solid hole and is adopted from top to bottom, bore and fill with one, high pressure impact extrusion grouting method carries out, and grouting slurries adopt cement grout.
11. unfavorable geologic body controllings according to claim 1 ooze profit chemical grouting method, it is characterized in that, step 6) after the chemical grouting of complete opening section terminates, adopt cement underflow to carry out complete opening backfill grouting.
12. unfavorable geologic body controllings according to claim 1 or 7 ooze profit chemical grouting method, it is characterized in that, step 3) in, in filling process, the real-time monitored grouting that also record and Heng Wen unit injection rate W match regulates and controls pressure P, carry out Heng Wen unit injection rate W to judge with regulation and control pressure P linear relationship, once occur that the linear relationships such as abrupt pressure reduction are abnormal, revise Heng Wen unit injection rate W value in time, guarantee steady unit injection rate W and its regulation and control pressure P retention wire sexual intercourse.
13. ooze profit chemical grouting method according to the unfavorable geologic body controlling one of claim 1 ~ 11 Suo Shu, it is characterized in that, described Hydraulic Double embolism is that a kind of upper and lower embolism collapses the Hydraulic Double embolism that can independently carry out controlling, this Hydraulic Double embolism comprises grout pipe (2), the floral tube (6) be communicated with grout pipe (2), is sleeved on the upper embolism (5) on floral tube (6) and lower embolism (6); Described upper embolism (5) and lower embolism (6) all have hydraulic cavities; The hydraulic cavities of described upper embolism (5) is communicated with top plug hydraulic tube (1), the hydraulic cavities of lower embolism (6) is communicated with lower embolism hydraulic tube (4), and the hydraulic cavities of described upper embolism (5) is not communicated with the hydraulic cavities of lower embolism (6).
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| CN108978624A (en) * | 2018-08-09 | 2018-12-11 | 中国三峡建设管理有限公司 | A kind of grouting splitting processing method |
| CN109491416A (en) * | 2018-10-16 | 2019-03-19 | 中国三峡建设管理有限公司 | A kind of filling stage boost control method |
| CN111636436A (en) * | 2020-05-25 | 2020-09-08 | 中国土木工程集团有限公司 | Construction method of foundation pit support |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105908585A (en) * | 2016-04-08 | 2016-08-31 | 天津市市政工程设计研究院 | Road foundation or base and building soft foundation grouting reinforcement method |
| CN108978624A (en) * | 2018-08-09 | 2018-12-11 | 中国三峡建设管理有限公司 | A kind of grouting splitting processing method |
| CN109491416A (en) * | 2018-10-16 | 2019-03-19 | 中国三峡建设管理有限公司 | A kind of filling stage boost control method |
| CN109491416B (en) * | 2018-10-16 | 2020-05-05 | 中国三峡建设管理有限公司 | Grouting stage boosting control method |
| CN111636436A (en) * | 2020-05-25 | 2020-09-08 | 中国土木工程集团有限公司 | Construction method of foundation pit support |
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| CN104328781B (en) | 2016-09-07 |
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