CN111472805A - Method for reinforcing rich-water tillite layer tunnel substrate - Google Patents
Method for reinforcing rich-water tillite layer tunnel substrate Download PDFInfo
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- CN111472805A CN111472805A CN201910853924.9A CN201910853924A CN111472805A CN 111472805 A CN111472805 A CN 111472805A CN 201910853924 A CN201910853924 A CN 201910853924A CN 111472805 A CN111472805 A CN 111472805A
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- water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Abstract
The application provides a method for reinforcing a rich-water moraine layer tunnel substrate, and belongs to the field of tunnel engineering. The method for reinforcing the tunnel substrate with the rich water tillite layer can improve the bearing capacity of the tunnel substrate and effectively prevent the accumulation of water below the substrate. Different from the stirring vibration of transmission, the noise influence of constructors of the ultrasonic vibration device is small, and meanwhile, compared with the traditional vibration mode, the method is more favorable for the reaction and growth of microorganisms, and further improves the reinforcing effect of the rich water moraine layer substrate.
Description
Technical Field
The invention relates to the field of tunnel engineering, in particular to a method for reinforcing a superglacial moraine tunnel substrate.
Background
The moraine layer is a special stratum formed by silt and rock fragments carried and transported in the action process of the moraine and left in place and deposited after the moraine is removed, and is also called a moraine deposit layer. The lenticular bodies, which are of mixed particle size, lack sorting properties, and are composed of gravel, sand or clay, are often mixtures of large stones and fine, muddy materials, with very different particle sizes. The color of the rock depends on the components of the parent rock, the rock is widely distributed and is mostly brown, and the brown, red and gray specks are included, and the components are also related to the deposition environment. The surrounding rock is rich in water, the self-stability capability is poor after excavation, and water and mud bursting disasters are easy to occur; after a large amount of water is drained, fine particles may be lost, and the stability of the tunnel structure is affected.
The tunnel base is the bottom structure of tunnel, guarantees train safety of traveling in the tunnel operation period and has important meaning. But because the design of plateau area tunnel bottom structure drainage is not conform to the requirement, can't discharge the rainwater rapidly when rainy season, in addition the construction process and the quality problem of tunnel basement, daily maintenance etc. are untimely, lead to tunnel basement to appear phenomenons such as fracture, damage and mud pumping, influence the normal operating of train.
Disclosure of Invention
In view of this, the embodiment of the application provides a method for reinforcing a rich-water tillite tunnel substrate, which aims to solve the problem of water inrush and mud outburst of the rich-water tillite tunnel substrate.
In a first aspect, the application provides a method for reinforcing a tunnel substrate with a rich water moraine layer, which comprises the following steps:
s100: and drilling at a preset position of the water-rich tillite layer section.
S200: an ultrasonic vibration device is installed in the hole.
S300: and injecting quick-setting cement slurry into the hole.
S400: and when the quick setting cement slurry is in or basically in an initial setting state, continuously drilling to deeply penetrate into the bedrock.
S500: and injecting a culture solution containing sarcina pasteurii into the holes, and continuously injecting a urea and calcium source mixed solution into the holes.
S600: and after the microorganism slurry is injected, taking out the grouting device, and starting the ultrasonic vibration device.
With reference to the first aspect, in a first possible implementation manner of the first aspect, in step S100, the hole depth after drilling is 5 to 7 m.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the resolution of the ultrasonic vibration device is 0.13mm, the voltage is 0 to 10V, the output is 4ma to 20ma, and the vibration frequency is 25 KHz.
With reference to the first aspect, in a third possible implementation manner of the first aspect, in step S300, the quick setting cement slurry is water glass cement slurry or HSC slurry, and the water-cement mass ratio is 0.5: 1.
with reference to the first aspect, in a fourth possible implementation manner of the first aspect, in step S500, the concentration of sarcina pasteurianum cells is 1010～1012cell/ml。
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, in step S500, the temperature of the culture solution and the mixed solution of urea and calcium source is between 10 ° and 25 °.
With reference to the first aspect or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, in step S500, the culture solution is composed of peptone at a concentration of 4-6 g/L and beef extract at a concentration of 2-4 g/L.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the urea-calcium source mixed solution is composed of a calcium source with a concentration of 0.7 mol/L-1.3 mol/L and urea with a concentration of 0.7 mol/L-1.3 mol/L, wherein a volume ratio of the calcium source and the urea mixed solution to the culture solution is 1: 3.
With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the calcium source is calcium chloride, calcium nitrate, or calcium lactate.
With reference to the first aspect, in a ninth possible implementation manner of the first aspect, in step S600, the vibration time of the ultrasonic vibration device is 4h to 8 h.
The invention has the beneficial effects that: the method for reinforcing the rich-water moraine layer tunnel substrate can improve the bearing capacity of the tunnel substrate and effectively prevent water from accumulating below the tunnel substrate. Different from the stirring vibration of transmission, the noise influence of constructors of the ultrasonic vibration device is small, and meanwhile, compared with the traditional vibration mode, the method is more favorable for the reaction and growth of microorganisms, and further improves the reinforcing effect of the rich water moraine layer substrate.
Further, aiming at the characteristics of poor particle sorting property and high coarse particle content in the rich-water moraine stratum geology, the proportion of the calcium source, the urea and the culture solution in the grouting is improved, so that the strength of the obtained slurry is increased by 20% compared with that before the slurry is not improved, and the reinforcing effect of the rich-water moraine stratum substrate is further improved.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a cross-sectional view of a superglacial moraine supporting structure in a first state according to an embodiment of the present application;
FIG. 2 is a schematic view of the reinforcing construction of the rich water moraine layer tunnel substrate provided by the embodiment of the application;
FIG. 3 is a diagram of a drill hole placement provided by an embodiment of the present application;
fig. 4 is a schematic view illustrating an installation of an ultrasonic vibration device according to an embodiment of the present application.
Icon: 1-inverted arch; 2-a drill rod; 3-ultrasonic vibration device.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the two components can be directly connected or indirectly connected through an intermediate medium, and can be communicated with each other inside the two components or in an interaction relationship of the two components; either electrical or electrical. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1, the application provides a method for reinforcing a superglacial moraine tunnel substrate, including the following steps:
s100: and drilling at a preset position of the water-rich tillite layer section.
Referring to fig. 2 and 3, during construction, a hole is drilled at a depth of 5 to 7m below the inverted arch 1 of the superglacial moraine water layer section. In the concrete implementation, the drill rod 2 is adopted for drilling construction.
S200, installing the ultrasonic vibration device 3 in the hole, wherein the parameters of the ultrasonic vibration device 3 are that the size is 18mm × 85mm, the resolution is 0.13mm, the voltage is 0-10V, the output quantity is 4 ma-20 ma, and the vibration frequency can be 25 KHz.
Referring to fig. 4, when installed, the ultrasonic vibration device 3 is installed in the hole wall.
S300: and injecting quick-setting cement slurry into the hole. Wherein, the quick-setting cement slurry can be water glass cement slurry or HSC slurry, and the mass ratio of water to cement is 0.5: 1.
s400: and when the quick setting cement slurry is in or basically in an initial setting state, continuously drilling to deeply penetrate into the bedrock.
S500: and injecting a culture solution containing sarcina pasteurii into the holes, and continuously injecting a urea and calcium source mixed solution into the holes. Wherein the Pasteurella bardana eight foldsThe concentration of coccal cells may be 1010～1012The cell/ml culture solution comprises 4-6 g/L peptone and 2-4 g/L beef extract, the urea calcium source mixed solution comprises 0.7 mol/L-1.3 mol/L calcium source and 0.7 mol/L-1.3 mol/L urea, the volume ratio of the calcium source to the urea mixed solution to the culture solution is 1:3, and the calcium source is calcium chloride, calcium nitrate or calcium lactate.
In specific implementation, the temperature of the culture solution and the mixed solution of urea and calcium source is controlled between 10 and 25 degrees.
S600: and after the microorganism slurry is injected, taking out the grouting device, and starting the ultrasonic vibration device. The microorganism slurry is also the culture solution and the mixed solution in step 500.
In step S600, the ultrasonic vibration device vibrates for 4 to 8 hours.
The method for reinforcing the rich-water moraine layer tunnel substrate can improve the bearing capacity of the tunnel substrate and effectively prevent water from accumulating below the tunnel substrate. Different from the stirring vibration of transmission, the noise influence of constructors of the ultrasonic vibration device is small, and meanwhile, compared with the traditional vibration mode, the method is more favorable for the reaction and growth of microorganisms, and further improves the reinforcing effect of the rich water moraine layer substrate.
Further, aiming at the characteristics of poor particle sorting property and high coarse particle content in the rich-water moraine stratum geology, the proportion of the calcium source, the urea and the culture solution in the grouting is improved, so that the strength of the obtained slurry is increased by 20% compared with that before the slurry is not improved, and the reinforcing effect of the rich-water moraine stratum substrate is further improved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The method for reinforcing the tunnel substrate of the rich water moraine layer is characterized by comprising the following steps of:
s100: drilling at a preset position of the water-rich tillite layer section;
s200: installing an ultrasonic vibration device in the hole;
s300: injecting quick-setting cement slurry into the hole;
s400: when the quick setting cement slurry is in or basically in an initial setting state, continuously drilling to deeply penetrate into the bedrock;
s500: injecting a culture solution containing sarcina pasteurii into the holes, and continuously injecting a urea and calcium source mixed solution into the holes;
s600: and after the microorganism slurry is injected, taking out the grouting device, and starting the ultrasonic vibration device.
2. The method for reinforcing the rich-water moraine tunnel substrate according to claim 1, characterized in that in step S100, the hole depth after drilling is 5-7 m.
3. The method for reinforcing the substrate of the rich water moraine layer tunnel according to claim 1, wherein the resolution of the ultrasonic vibration device is 0.13mm, the voltage is 0-10V, the output quantity is 4 ma-20 ma, and the vibration frequency is 25 KHz.
4. The method for reinforcing the rich-water moraine tunnel substrate according to claim 1, wherein in the step S300, the quick-setting cement slurry is water glass cement slurry or HSC slurry, and the mass ratio of water to cement is 0.5: 1.
5. the method for reinforcing the tunnel substrate with rich water moraine layer according to claim 1, wherein in step S500, the concentration of sarcina pasteurianum cells is 1010～1012cell/ml。
6. The method for reinforcing the substrate of the rich-water moraine layer tunnel according to claim 1, wherein in step S500, the temperature of the culture solution and the mixed solution of urea and a calcium source is between 10 ° and 25 °.
7. The method for reinforcing the superglacial moraine water layer-rich tunnel substrate according to any one of claims 1 to 6, wherein in step S500, the culture solution is composed of peptone with a concentration of 4 to 6 g/L and beef extract with a concentration of 2 to 4 g/L.
8. The method for reinforcing the basement of the superglacial moraine rich water layer tunnel according to claim 7, wherein the mixed solution of the urea and the calcium source consists of the calcium source with the concentration of 0.7 mol/L-1.3 mol/L and the urea with the concentration of 0.7 mol/L-1.3 mol/L, and the volume ratio of the mixed solution of the calcium source and the urea to the culture solution is 1: 3.
9. The method for reinforcing the rich-water moraine tunnel substrate according to claim 8, characterized in that the calcium source is calcium chloride, calcium nitrate or calcium lactate.
10. The method for reinforcing the rich water moraine layer tunnel substrate according to claim 1, wherein in the step S600, the vibration time of the ultrasonic vibration device is 4 to 8 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910853924.9A CN111472805A (en) | 2019-09-10 | 2019-09-10 | Method for reinforcing rich-water tillite layer tunnel substrate |
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| CN201910853924.9A CN111472805A (en) | 2019-09-10 | 2019-09-10 | Method for reinforcing rich-water tillite layer tunnel substrate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813953A (en) * | 2020-12-29 | 2021-05-18 | 南京工业大学 | Device for reinforcing foundation by microorganism ultrasonic grouting and construction method thereof |
| CN113322935A (en) * | 2021-06-01 | 2021-08-31 | 中铁四局集团有限公司 | Method for preventing settlement of consolidation of peripheral stratum of underground station |
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| RU2096621C1 (en) * | 1996-01-23 | 1997-11-20 | Акционерное общество закрытого типа "МЕТРОКОН" | Method for driving deep tunnels in loose ground |
| CN105345927A (en) * | 2015-09-30 | 2016-02-24 | 许昌金科资源再生股份有限公司 | Dry concrete blending process based on ultrasonic waves |
| CN105350988A (en) * | 2015-11-30 | 2016-02-24 | 中国神华能源股份有限公司 | Tunnel base reinforcing method |
| CN105837075A (en) * | 2015-07-07 | 2016-08-10 | 东南大学 | Method of reinforcing regenerated concrete fine aggregate with microorganism depositing calcium carbonate |
| CN110056360A (en) * | 2019-05-10 | 2019-07-26 | 中交二航局第四工程有限公司 | A kind of construction method in highway stone matter tunnel |
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2019
- 2019-09-10 CN CN201910853924.9A patent/CN111472805A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2096621C1 (en) * | 1996-01-23 | 1997-11-20 | Акционерное общество закрытого типа "МЕТРОКОН" | Method for driving deep tunnels in loose ground |
| CN105837075A (en) * | 2015-07-07 | 2016-08-10 | 东南大学 | Method of reinforcing regenerated concrete fine aggregate with microorganism depositing calcium carbonate |
| CN105345927A (en) * | 2015-09-30 | 2016-02-24 | 许昌金科资源再生股份有限公司 | Dry concrete blending process based on ultrasonic waves |
| CN105350988A (en) * | 2015-11-30 | 2016-02-24 | 中国神华能源股份有限公司 | Tunnel base reinforcing method |
| CN110056360A (en) * | 2019-05-10 | 2019-07-26 | 中交二航局第四工程有限公司 | A kind of construction method in highway stone matter tunnel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813953A (en) * | 2020-12-29 | 2021-05-18 | 南京工业大学 | Device for reinforcing foundation by microorganism ultrasonic grouting and construction method thereof |
| CN112813953B (en) * | 2020-12-29 | 2022-04-15 | 南京工业大学 | Device for reinforcing foundation by microorganism ultrasonic grouting and construction method thereof |
| CN113322935A (en) * | 2021-06-01 | 2021-08-31 | 中铁四局集团有限公司 | Method for preventing settlement of consolidation of peripheral stratum of underground station |
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