CN110886309B - Double-slurry mixing device and construction method for treating quicksand layer by using double-slurry mixing device - Google Patents
Double-slurry mixing device and construction method for treating quicksand layer by using double-slurry mixing device Download PDFInfo
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- CN110886309B CN110886309B CN201911229121.2A CN201911229121A CN110886309B CN 110886309 B CN110886309 B CN 110886309B CN 201911229121 A CN201911229121 A CN 201911229121A CN 110886309 B CN110886309 B CN 110886309B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/14—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
- B28C5/142—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis the stirrer shaft carrying screw-blades
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A double-slurry mixing device comprises a mixing cavity, a stirring device and a water glass liquid outlet device, wherein the stirring device is arranged in the mixing cavity and connected with the mixing cavity; the water glass liquid outlet device comprises a water glass accommodating cavity and an opening and closing device, and the opening and closing device is arranged in the water glass accommodating cavity; the construction method for treating the quicksand layer by using the double-slurry mixing device comprises the following steps of: determining the depth of the silty clay layer through a digging groove in the foundation pit; the method comprises the following steps that steel pipes with the diameter of 146mm and the wall thickness of 6mm are driven into the outer side of a crown beam between drilled piles, grouting holes are distributed in pipe bodies, the distance between the steel pipes is 0.4m, the steel pipes penetrate through powdery clay, and the length of the steel pipes entering a pebble layer is not less than 2 m; grouting the convective sand layer by using a steel pipe, wherein the grouting pressure is 0.4-0.8 MPa, and the grouting depth is 1.0m above and below the powdery clay layer; wherein, the grouting slurry is prepared from cement, water and water glass according to the mixing ratio of 1: 1: 1.68 to obtain a double-liquid-slurry solution.
Description
Technical Field
The invention relates to a double-slurry mixing device and a construction method for treating a quicksand layer by using the double-slurry mixing device.
Background
When a certain open-cut station of Chengdu subway encounters a silty clay clamp lenticle sand layer during excavation, the site is a grade I grade of Minjiang river system alluvial plain, and according to the revelation of drilling holes, a fourth system of complete and new artificial filling is covered in the site range, and most of the complete and new artificial filling is mixed filling; the fourth system of completely new system build-up layer is below the first system; the underburden is a claret mudstone of the chalk system top system sprue set. The main rock-soil layers of the section are layered as follows: filling soil with impurities; a powdery clay; pebble: loose pebbles, slightly dense pebbles, medium dense pebbles and dense pebbles; moderate weathering mudstone, wherein mix with the lens body in the silty clay layer and run the sand bed, the cobble layer osmotic coefficient is about 22 meters/every day, and the water yield is relatively abundant, leads to the silty fine sand after the liquefaction to flow into the foundation ditch through between the stake, causes the foundation ditch excavation to go on normally, has increased the engineering risk.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the object of the present invention is to: a double-liquid-slurry mixing device and a construction method for treating a quicksand layer by using the double-liquid-slurry mixing device can ensure that a water glass solution is not blocked when intermittent pouring or temporary stopping pouring is carried out, and simultaneously can ensure that the consolidation effect of soil layers among enclosing piles after excavation is obvious and the water stopping effect is obvious.
In order to achieve the purpose, the invention provides the following technical scheme:
a double-slurry mixing device comprises a mixing cavity, a stirring device and a water glass liquid outlet device, wherein the stirring device is arranged in the mixing cavity and connected with the mixing cavity;
the water glass liquid outlet device comprises a water glass accommodating cavity and an opening and closing device, and the opening and closing device is arranged in the water glass accommodating cavity;
the opening and closing device comprises a plurality of sliding blocks, a plurality of sealing parts, a base and an elastic resetting piece, wherein one end of the elastic resetting piece is connected with the top of the base, and the other end of the elastic resetting piece is connected with the top of the water glass containing cavity; the sliding block and the sealing part are connected with the base;
the water glass accommodating cavity is of a structure that the cross sectional area of the top and the bottom is smaller than that of the middle, a water glass inlet is formed in the side wall of the water glass accommodating cavity and is arranged in the middle of the water glass accommodating cavity, a plurality of slide ways are arranged on the side wall of the bottom of the water glass accommodating cavity, the slide ways are of S-shaped structures, the slide blocks move in the slide ways, and the top of the base is arranged at the top of the water glass accommodating cavity;
the side wall of the bottom of the water glass accommodating cavity is provided with a plurality of through holes, and the sealing part can cover the through holes; the through hole is arranged inside the mixing cavity;
the mixing cavity is provided with a discharge hole and a cement inlet.
Further: the sealing part is a rubber block made of rubber.
Further: the stirring device comprises a stirring blade and a stirring blade driving device, and the stirring blade driving device is connected with the stirring blade and drives the stirring blade to rotate.
Further: the discharge port is provided with a valve.
Further: the stirring blade driving device is a motor.
The construction method for treating the quicksand layer by using the double-slurry mixing device comprises the following steps of:
s1, determining the depth of the silty clay layer through the excavation probe groove in the foundation pit;
s2, driving steel pipes with the diameter of 146mm, the wall thickness of 6mm and grouting holes distributed on pipe bodies at the outer sides of the crown beams among the drilled piles, wherein the spacing between the steel pipes is 0.4m, and the length of the steel pipes penetrating through the powdery clay and entering the pebble layer is not less than 2 m;
s3, grouting the sand layer by using a steel pipe, wherein the grouting pressure is 0.4-0.8 MPa, and the grouting depth is 1.0m above and below the powdery clay layer; wherein, the grouting slurry is prepared from cement, water and water glass according to the mixing ratio of 1: 1: 1.68 to obtain a double-liquid-slurry solution.
Further: the steel pipes are installed in sections, the two sections are connected through screw threads, the length of the screw thread section is larger than 150mm, the lengths of the steel pipe sections of the adjacent steel pipes are different, the length of the shortest steel pipe section is not smaller than 5m, the length difference of the steel pipe sections of the adjacent steel pipes with the same number of sections is not smaller than 1m, one steel pipe section is firstly driven into the ground during piling, and then the steel pipe sections to be connected are connected after the verticality of the steel pipe sections to be connected is corrected.
Further: the diameter of each grouting hole in the steel pipe is 10mm, the hole spacing is 200mm, the steel pipes are arranged in a quincunx mode, and the grouting holes are not drilled within 2.0m of the tail portion of the stratum when the steel pipes are not inserted into the stratum.
Further: the grouting amount of each steel pipe pile is 2 times of the theoretical grouting amount, and the grouting pressure is adjusted according to the actual grouting condition during grouting.
Further: during grouting, two piles are adopted for circularly grouting, namely, a steel pipe is firstly grouted, the grouting amount accounts for about 60 percent of the total grouting amount of the steel pipe, then another adjacent steel pipe is grouted, the grouting amount also accounts for about 60 percent of the total grouting amount of the steel pipe, and then the rest grouting is sequentially injected into the first steel pipe and the second steel pipe.
Compared with the prior art, the invention has the following beneficial effects:
the double-liquid slurry is effectively diffused and consolidated in the quicksand layer under the action of pressure, the consolidation slurry around the pile and the steel pipe pile are combined to play roles of retaining soil and locally stopping water, and the consolidation effect of the soil layer between the enclosure piles is obvious and the water stopping effect is obvious after excavation.
The double-liquid-slurry mixing device can prevent cement slurry from entering the water glass containing cavity, and ensures that the water glass solution cannot be blocked when intermittent filling or temporary stopping filling is carried out.
Drawings
FIG. 1 is a schematic diagram of a dual slurry mixing apparatus according to the present invention;
FIG. 2 is a view showing the inside structure of a water glass accommodating chamber;
FIG. 3 is a structural diagram of a water glass draining device;
FIG. 4 is a schematic diagram of the geological structure of a sand-egg formation.
List of reference numerals
The device comprises a 1-water glass liquid outlet device, a 2-mixing cavity, a 3-stirring blade driving device, a 4-stirring blade, a 5-powder clay layer, a 6-pebble layer, a 7-opening and closing device, a 101-water glass containing cavity, a 1011-slideway, a 1012-through hole, a 111-elastic reset piece, a 112-base, a 113-sealing part and a 114-sliding block.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, integrally connected, or detachably connected; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meaning of the above terms in the present invention in specific situations.
A double-slurry mixing device comprises a mixing cavity 2, a stirring device and a water glass liquid outlet device 1, wherein the stirring device is arranged in the mixing cavity 2 and connected with the mixing cavity 2, and the water glass liquid outlet device 1 is connected with the mixing cavity 2;
the water glass liquid outlet device 1 comprises a water glass accommodating cavity and an opening and closing device 7, wherein the opening and closing device 7 is arranged in the water glass accommodating cavity;
the opening and closing device 7 comprises a plurality of sliders 114, a plurality of sealing parts 113, a base 112 and an elastic resetting piece 111, wherein one end of the elastic resetting piece 111 is connected with the top of the base 112, and the other end of the elastic resetting piece is connected with the top of the water glass accommodating cavity; the slider 114 and the sealing part 113 are connected to the base 112;
the water glass accommodating cavity is of a structure that the cross sectional area of the top and the bottom is smaller than that of the middle, a water glass inlet is formed in the side wall of the water glass accommodating cavity, the water glass inlet is formed in the middle of the water glass accommodating cavity, a plurality of slide ways 1011 are formed in the side wall of the bottom of the water glass accommodating cavity, the slide ways 1011 are of S-shaped structures, the slide block 114 moves in the slide ways 1011, and the top of the base 112 is located at the top of the water glass accommodating cavity;
the side wall of the bottom of the water glass containing cavity is provided with a plurality of through holes 1012, and the sealing part 113 can cover the through holes 1012; the through hole 1012 is arranged inside the mixing chamber 2;
the mixing cavity 2 is provided with a discharge hole and a cement inlet.
When double-liquid-slurry needs to be mixed, a water glass solution is introduced into the water glass accommodating cavity from the water glass inlet, when the pressure in the water glass accommodating cavity gradually increases to be larger than a certain value, the base 112 is pushed to rise, the sliding block 114 is further made to move along the sliding rail 1011, and due to the fact that the sliding rail 1011 is of an S-shaped structure, in the moving process of the sliding block 114, the base 112 rotates, and the purpose of opening the through hole 1012 is achieved.
When the double-liquid-slurry does not need to be mixed, the water glass solution is stopped being added into the water glass containing cavity, the pressure of the water glass containing cavity is reduced, the base 112 is pushed back to the original position under the action of the elastic resetting piece 111, the through hole 1012 is resealed, the cement slurry can be prevented from entering the water glass containing cavity, and the water glass solution is prevented from being blocked when the double-liquid-slurry is intermittently poured or temporarily stopped pouring.
Further, the sealing portion 113 is a rubber block made of rubber. The water glass solution is a strong alkaline solution, and the rubber has good alkali resistance.
Further, the stirring device comprises a stirring blade 4 and a stirring blade driving device 3, and the stirring blade driving device 3 is connected with the stirring blade 4 and drives the stirring blade 4 to rotate.
Further, the discharge hole is provided with a valve.
Further, the driving device 3 of the stirring blade 4 is a motor.
The construction method for treating the quicksand layer by using the double-slurry mixing device comprises the following steps of:
s1, determining the depth of the silty clay layer 5 through digging a detection groove in the foundation pit;
s2, steel pipes with the diameter of 146mm, the wall thickness of 6mm and grouting holes distributed on pipe bodies are driven into the outer sides of the crown beams among the drilled piles, the spacing between the steel pipes is 0.4m, and the length of the steel pipes penetrating through the powdery clay and entering the pebble layer 6 is not less than 2 m;
s3, grouting the sand layer by using a steel pipe, wherein the grouting pressure is 0.4-0.8 MPa, and the grouting depth is 1.0m above and below the powdery clay layer 5; wherein, the grouting slurry is prepared from cement, water and water glass according to the mixing ratio of 1: 1: 1.68 to obtain a double-liquid-slurry solution.
The double-liquid slurry is effectively diffused and consolidated in the quicksand layer under the action of pressure, the consolidation slurry around the pile and the steel pipe pile are combined to play roles of retaining soil and locally stopping water, and the consolidation effect of the soil layer between the enclosure piles is obvious and the water stopping effect is obvious after excavation.
Further, the following steps: the steel pipes are installed in sections, the two sections are connected through screw threads, the length of the screw thread section is larger than 150mm, the lengths of the steel pipe sections of the adjacent steel pipes are different, the length of the shortest steel pipe section is not smaller than 5m, the length difference of the steel pipe sections with the same number of sections of the adjacent steel pipes is not smaller than 1m, when piling is carried out, one steel pipe section is firstly driven into the ground, and then the steel pipe sections to be connected are connected after the verticality of the steel pipe sections to be connected is corrected;
the joints of two adjacent steel pipes with different section lengths are in staggered connection, so that the pressure applied to the joints of the steel pipes is reduced, and the steel pipes meet the requirement of required bearing capacity.
In the invention, the total station is used for calibrating the verticality of the steel pipe sections, so that the connection inclination between the sections is prevented.
Furthermore, the diameter of the grouting holes in the steel pipe is 10mm, the hole spacing is 200mm, the steel pipe is arranged in a quincunx shape, and the grouting holes are not drilled within 2.0m of the tail part of the steel pipe which is not inserted into the stratum.
Furthermore, the grouting amount of each steel pipe pile is 2 times of the theoretical grouting amount, and the grouting pressure is adjusted according to the actual grouting condition during grouting.
Further, during grouting, two piles are adopted for circularly grouting, namely, a steel pipe is firstly grouted, the grouting amount accounts for about 60% of the total grouting amount of the steel pipe, then another adjacent steel pipe is grouted, the grouting amount also accounts for about 60% of the total grouting amount of the steel pipe, and then the rest of grout is sequentially injected into the first steel pipe and the second steel pipe. Through circulating grouting, one steel pipe has interval in grouting, so that cement paste can be better diffused. The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments in the above-described embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (5)
1. The double-slurry mixing device is characterized by comprising a mixing cavity (2), a stirring device and a water glass liquid outlet device (1), wherein the stirring device is arranged in the mixing cavity (2) and connected with the mixing cavity (2), and the water glass liquid outlet device (1) is connected with the mixing cavity (2);
the water glass liquid outlet device (1) comprises a water glass accommodating cavity and an opening and closing device (7), wherein the opening and closing device (7) is arranged in the water glass accommodating cavity;
the opening and closing device (7) comprises a plurality of sliding blocks (114), a plurality of sealing parts (113), a base (112) and an elastic resetting piece (111), one end of the elastic resetting piece (111) is connected with the top of the base (112), and the other end of the elastic resetting piece is connected with the top of the water glass containing cavity; the slider (114) and the sealing part (113) are connected with the base (112);
the water glass accommodating cavity is of a structure that the cross sectional area of the top and the bottom is smaller than that of the middle, a water glass inlet is formed in the side wall of the water glass accommodating cavity, the water glass inlet is formed in the middle of the water glass accommodating cavity, a plurality of slide ways (1011) are arranged on the side wall of the bottom of the water glass accommodating cavity, each slide way (1011) is of an S-shaped structure, the sliding block (114) moves in each slide way (1011), and the top of the base (112) is arranged at the top of the water glass accommodating cavity;
the side wall of the bottom of the water glass containing cavity is provided with a plurality of through holes (1012), and the sealing part (113) can cover the through holes (1012); the through hole (1012) is arranged inside the mixing chamber (2);
the mixing cavity (2) is provided with a discharge hole and a cement inlet.
2. The dual slurry mixing device according to claim 1, wherein: the sealing part (113) is a rubber block made of rubber.
3. The dual slurry mixing device according to claim 2, wherein: the stirring device comprises a stirring blade (4) and a stirring blade (4) driving device (3), wherein the stirring blade (4) driving device (3) is connected with the stirring blade (4) and drives the stirring blade (4) to rotate.
4. The dual slurry mixing device according to claim 3, wherein: the discharge port is provided with a valve.
5. The dual slurry mixing device according to claim 4, wherein: the driving device (3) of the stirring blade (4) is a motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911229121.2A CN110886309B (en) | 2019-12-04 | 2019-12-04 | Double-slurry mixing device and construction method for treating quicksand layer by using double-slurry mixing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911229121.2A CN110886309B (en) | 2019-12-04 | 2019-12-04 | Double-slurry mixing device and construction method for treating quicksand layer by using double-slurry mixing device |
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| CN110886309A CN110886309A (en) | 2020-03-17 |
| CN110886309B true CN110886309B (en) | 2021-06-18 |
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Citations (6)
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| 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 |
| CN102230318A (en) * | 2011-04-22 | 2011-11-02 | 中铁五局（集团）有限公司 | Two-fluid grouting water plugging construction method for pebble layer with strong permeability |
| CN102900073A (en) * | 2012-11-05 | 2013-01-30 | 深圳市勘察研究院有限公司 | Double-liquid grouting mixer |
| CN105544547A (en) * | 2015-12-17 | 2016-05-04 | 中国一冶集团有限公司 | Covering type soil filled and soft soil stratum segmented reinforcing device and method |
| CN207606978U (en) * | 2017-12-18 | 2018-07-13 | 陈天桥 | A kind of road pit-hole is filled up with bi-component concrete process equipment |
| CN207633344U (en) * | 2017-12-07 | 2018-07-20 | 北京航天地基工程有限责任公司 | Slip casting component and ground restoration equipment |
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2019
- 2019-12-04 CN CN201911229121.2A patent/CN110886309B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102230318A (en) * | 2011-04-22 | 2011-11-02 | 中铁五局（集团）有限公司 | Two-fluid grouting water plugging construction method for pebble layer with strong permeability |
| CN102900073A (en) * | 2012-11-05 | 2013-01-30 | 深圳市勘察研究院有限公司 | Double-liquid grouting mixer |
| CN105544547A (en) * | 2015-12-17 | 2016-05-04 | 中国一冶集团有限公司 | Covering type soil filled and soft soil stratum segmented reinforcing device and method |
| CN207633344U (en) * | 2017-12-07 | 2018-07-20 | 北京航天地基工程有限责任公司 | Slip casting component and ground restoration equipment |
| CN207606978U (en) * | 2017-12-18 | 2018-07-13 | 陈天桥 | A kind of road pit-hole is filled up with bi-component concrete process equipment |
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| CN110886309A (en) | 2020-03-17 |
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