CN111501743A - Titanium white tailing curing method - Google Patents
Titanium white tailing curing method Download PDFInfo
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- CN111501743A CN111501743A CN202010329121.6A CN202010329121A CN111501743A CN 111501743 A CN111501743 A CN 111501743A CN 202010329121 A CN202010329121 A CN 202010329121A CN 111501743 A CN111501743 A CN 111501743A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/24—Placing by using fluid jets
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of tailing pond safety, and particularly discloses a titanium dioxide tailing curing method. The method fills the blank of the method for curing the titanium dioxide tailings by mixing cement with soil, improves the safety and stability of the titanium dioxide tailings pond, and improves the foundation bearing capacity of the titanium dioxide tailings before reinforcement from less than 20kPa to more than 55 kPa. The invention has simple construction process and low equipment requirement. The method has wide application range, and is suitable for the titanium dioxide tailing pond in arid regions and the titanium dioxide tailing pond in rainy regions in south.
Description
Technical Field
The invention belongs to the technical field of uranium tailing pond safety, and particularly relates to a titanium white tailing curing method.
Background
The titanium white tailings are waste produced in the process of producing titanium white, are usually discharged in the form of waste liquid, have high content of water-soluble salt and organic matter, and have the characteristics of high water content, high compressibility, low water permeability, low mechanical strength and the like. The titanium dioxide tailings in the tailing pond are mostly in a flow molding-soft molding state, a large amount of silt titanium dioxide tailings are stored in the tailing pond, if the silt titanium dioxide tailings cannot be properly treated, the long-term stability of the tailing pond cannot be guaranteed, and the beach surface can generate large uneven settlement within a long time, so that the safety and the stability of the tailing pond are not facilitated. Once the dam break accident happens to the tailing pond, huge life and property losses are caused to downstream residents, and the downstream environment is polluted.
Although the cement-soil mixing method is successfully applied to domestic natural soft soil treatment, the titanium dioxide tailings and the natural soft soil have great difference in properties. The natural soft soil is formed by long-term scouring and weathering of rocks by water flow, the water content is generally 50-70%, and the strength of the cross plate is more than 25 kPa. The titanium white tailings are formed by depositing waste liquid discharged in the production process of titanium white. The titanium dioxide tailings and natural soft soil have great difference in physical and mechanical properties, the water content of the titanium dioxide tailings is about 150-260%, and the strength of the cross plate is less than 10 kPa.
At present, no effective treatment method for curing the titanium white tailings is provided at home and abroad.
Disclosure of Invention
The invention provides a titanium white tailing curing method, which is a method for enhancing the safety of a tailing pond by utilizing a cement stirring pile to promote the titanium white tailing curing, solves the technical problem of potential safety hazards of the tailing pond, and provides a solution for enhancing the safety of the tailing pond.
The technical scheme of the invention is realized as follows:
a titanium dioxide tailing solidification method comprises the following steps:
1) analyzing the physical and mechanical characteristics in the foundation soil chamber;
2) analyzing a cement-soil mixture test;
3) measuring lofting and pile positioning: the mixing piles are arranged in a regular triangular row, and the bamboo chip inserting piles are used as indications at the positions of the mixing piles;
4) the pile driver is in place: the pile driver moves by using a walking system to reach a designated pile position and is centered;
5) preparing cement paste;
6) premixing and sinking: starting a motor of the mixing pile machine, loosening a sling of the mixing pile machine, and enabling the mixing pile machine to stir and cut soil to sink along a guide frame, wherein the sinking speed can be controlled by a current monitoring meter of the motor; stopping drilling when the drill bit sinks to the designed depth position;
7) spraying slurry, stirring and lifting: in the lifting process, the slurry spraying and stirring are started, and the cement slurry is continuously stirred in the slurry spraying process;
8) and (3) secondary stirring and sinking: after the first guniting stirring and lifting is finished, continuing to stir for the second time to sink;
9) re-stirring and lifting: starting the second time of guniting, lifting the drill bit in the guniting process, and continuously stirring cement paste;
10) cleaning: cleaning a cement slurry stirring barrel;
11) and (3) shifting: and moving the pile driver to the next pile position, and repeating the steps for construction.
Further, in the step 1), the titanium white tailing slurry is taken out from the titanium white tailing area by adopting a drilling sampling method to perform physical and mechanical property analysis.
Further, the step 2) is specifically as follows:
a) carrying out a slime curing ratio test and physical and mechanical property indexes of different cements, water-cement ratios and cement mixing amounts at different ages to determine the slime curing ratio;
b) suitability and reasonable formula suggestion for tailing mud and water treatment by stirring method
Preparing tailing slurry cement mixing soil samples according to the slurry solidification proportion determined in the step a), preparing the samples according to ages of 28d and 90d, and performing water content, density and unconfined compressive strength tests on each sample to determine the variety, mixing proportion and pile spacing of cement;
c) and c, performing field test on the cement soil mixing piles, performing test verification on the reinforcement effect of the mixing piles for the foundation, wherein the cement varieties, the mixing proportion and the pile spacing are determined in the step b), and determining the cement varieties, the mixing proportion and the pile spacing under the condition of meeting the designed bearing capacity.
Further, step 3), the mixing piles are arranged in a regular triangle row, and positioning is measured by adopting Huazhong T5 GPS (RTK).
Further, step 5), the water amount in the cement paste is controlled by adopting a quantitative container, and the cement paste can be prepared after the stirring machine sinks to the designed depth.
Furthermore, the sinking speed is less than or equal to 0.8m/min, and the working current is not more than 70A.
Further, the guniting amount of the first guniting is the same as that of the second guniting.
The invention provides a titanium dioxide tailing curing method, which has the following advantages:
1) the cement mixing pile method is applied to the titanium dioxide tailing solidification, so that the safety of the dam body of the tailing pond is improved, the construction process is simple, and the safety and the stability of the titanium dioxide tailing pond can be effectively improved.
2) Fills the blank of the method for curing the titanium dioxide tailings by mixing cement with soil.
3) The safety and stability of the titanium dioxide tailing pond are improved, and the foundation bearing capacity of the titanium dioxide tailings before reinforcement is improved to over 55kPa from less than 20 kPa.
3) The invention has simple construction process and low equipment requirement.
4) The method has wide application range, and is suitable for the titanium dioxide tailing pond in arid regions and the titanium dioxide tailing pond in rainy regions in south.
Drawings
FIG. 1 is a schematic flow chart of a titanium white tailing solidification method of the invention;
FIG. 2 is a schematic view of the present invention.
Detailed Description
The invention relates to a titanium dioxide tailing solidification method, and the specific implementation mode of the invention is further explained by combining the attached drawings 1-2 and specific application examples:
the first embodiment is as follows:
aiming at a certain titanium dioxide tailing pond in Hunan province, the titanium dioxide tailings are solidified by adopting a cement soil mixing method.
The titanium dioxide tailing curing method comprises the following steps:
1) analyzing the physical and mechanical characteristics in the foundation soil chamber;
2) analyzing a cement-soil mixture test;
3) measuring lofting and pile positioning: the mixing piles are arranged in a regular triangular row, and the bamboo chip inserting piles are used as indications at the positions of the mixing piles;
4) the pile driver is in place: the pile driver moves by using a walking system to reach a designated pile position and is centered;
5) preparing cement paste;
6) premixing and sinking: starting a motor of the mixing pile machine, loosening a sling of the mixing pile machine, and enabling the mixing pile machine to stir and cut soil to sink along a guide frame, wherein the sinking speed can be controlled by a current monitoring meter of the motor; stopping drilling when the drill bit sinks to the designed depth position;
7) spraying slurry, stirring and lifting: in the lifting process, the slurry spraying and stirring are started, and the cement slurry is continuously stirred in the slurry spraying process;
8) and (3) secondary stirring and sinking: after the first guniting stirring and lifting is finished, continuing to stir for the second time to sink;
9) re-stirring and lifting: starting the second time of guniting, lifting the drill bit in the guniting process, and continuously stirring cement paste;
10) cleaning: cleaning a cement slurry stirring barrel;
11) and (3) shifting: and moving the pile driver to the next pile position, and repeating the steps for construction.
And analyzing the physical and mechanical characteristics in the foundation soil chamber, wherein the titanium white tailing slurry is taken out from the titanium white tailing area by adopting a drilling and sampling method to analyze the physical and mechanical characteristics. The physical and mechanical property indexes of the titanium white tailing mud for physical and mechanical property analysis comprise water content, density, specific gravity, porosity ratio, saturation and liquid-plastic limit analysis physical properties, compression tests, consolidation tests, penetration tests, unconfined compressive strength tests and other mechanical property tests, and the physical and mechanical indexes of the parameters are provided. And (4) evaluating the field stability and suitability, analyzing and evaluating the uniformity of foundation soil, analyzing water quality and the like according to the physical and mechanical characteristics, and giving conclusions and suggestions.
The cement-soil mixture test analysis specifically comprises the following steps: a) carrying out a slime curing ratio test and physical and mechanical property indexes of different cements, water-cement ratios and cement mixing amounts at different ages to determine the slime curing ratio;
the cement was selected and tested from Portland cement P.O42.5, composite cement P.C32.5, high aluminate cement CA-50, sulfate-resistant cement P.HSR42.5 and slag cement.
b) Suitability for treating the titanium white tailing mud by a stirring method and reasonable formula suggestion;
preparing tailing slurry cement mixing soil samples according to the slurry solidification proportion determined in the step a), preparing the samples according to ages of 28d and 90d, and performing water content, density and unconfined compressive strength tests on each sample to determine the variety, mixing proportion and pile spacing of cement;
c) and c, performing field test on the cement soil mixing piles, performing test verification on the reinforcement effect of the mixing piles for the foundation, wherein the cement varieties, the mixing proportion and the pile spacing are determined in the step b), and determining the cement varieties, the mixing proportion and the pile spacing under the condition of meeting the designed bearing capacity.
Measuring lofting and pile positioning: the mixing piles are arranged in a regular triangular row, and the bamboo chip inserting piles are used as indications at the positions of the mixing piles; this step uses watson T5 gps (rtk) for measurement positioning.
The pile driver is in place: the pile driver moves by using a walking system to reach a designated pile position and is centered. When the ground is uneven, a hydraulic balance device of the mixing pile machine is adopted to keep the equipment horizontal, the length of a drill rod and the diameter of a drill bit are checked, and the pile machine is moved to a specified position to align the pile position.
Preparing cement paste, mixing the cement paste according to the water cement ratio of 0.5, and controlling the water consumption by using a quantitative container; the cement slurry can be prepared after the mixer sinks to the designed depth.
Premixing and sinking: starting a motor of the mixing pile machine, loosening a sling of the mixing pile machine, and enabling the mixing pile machine to stir and cut soil to sink along a guide frame, wherein the sinking speed can be controlled by a current monitoring meter of the motor; and stopping drilling when the drill bit sinks to the designed depth position. Wherein the sinking speed is less than or equal to 0.8m/min, and the working current is not more than 70A.
Spraying slurry, stirring and lifting: and in the lifting process, the cement slurry is sprayed and stirred, and the cement slurry is continuously stirred in the cement slurry spraying process.
And (3) secondary stirring and sinking: and after the first guniting stirring and lifting is finished, continuing to stir for the second time to sink.
Re-stirring and lifting: and starting the second time of guniting, lifting the drill bit in the guniting process, and continuously stirring cement paste. The first guniting amount is the same as the second guniting amount.
Cleaning: cleaning a cement slurry stirring barrel; it should be noted that when the pile machine stops construction or the construction interval time is too long, clear water is added into the cement slurry stirring barrel, the mortar pump is started, the residual cement slurry in all pipes is cleaned until the pipes are basically clean, and the soft soil adhered to the stirring head is cleaned.
And (3) shifting: and moving the pile driver to the next pile position, and repeating the steps for construction.
The detection reinforcement effect knows the increase condition of ground bearing capacity, needs to carry out the on-the-spot reinforcement effect and detects, and the detection project bears for the ground, selects to be no less than 6 points and detects.
And the detection result shows that the foundation bearing capacity of the titanium white tailing mud is improved to 55kPa from 20kPa before reinforcement, so that the safety and stability of the titanium white tailing mud are improved.
It should be noted that the step numbers in fig. 1 correspond to the step numbers in fig. 2.
In conclusion, the above embodiments are merely intended to illustrate the technical solution of the present invention and not to limit, although the present invention has been described by referring to certain preferred embodiments thereof, it should be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (7)
1. The titanium dioxide tailing solidification method is characterized by comprising the following steps:
1) analyzing the physical and mechanical characteristics in the foundation soil chamber;
2) analyzing a cement-soil mixture test;
3) measuring lofting and pile positioning: the mixing piles are arranged in a regular triangular row, and the bamboo chip inserting piles are used as indications at the positions of the mixing piles;
4) the pile driver is in place: the pile driver moves by using a walking system to reach a designated pile position and is centered;
5) preparing cement paste;
6) premixing and sinking: starting a motor of the mixing pile machine, loosening a sling of the mixing pile machine, and enabling the mixing pile machine to stir and cut soil to sink along a guide frame, wherein the sinking speed can be controlled by a current monitoring meter of the motor; stopping drilling when the drill bit sinks to the designed depth position;
7) spraying slurry, stirring and lifting: in the lifting process, the slurry spraying and stirring are started, and the cement slurry is continuously stirred in the slurry spraying process;
8) and (3) secondary stirring and sinking: after the first guniting stirring and lifting is finished, continuing to stir for the second time to sink;
9) re-stirring and lifting: starting the second time of guniting, lifting the drill bit in the guniting process, and continuously stirring cement paste;
10) cleaning: cleaning a cement slurry stirring barrel;
11) and (3) shifting: and moving the pile driver to the next pile position, and repeating the steps for construction.
2. The titanium white tailings solidification method as claimed in claim 1, wherein in the step 1), the titanium white tailings slurry is taken out from the titanium white tailings area by a drilling sampling method to perform physical and mechanical property analysis.
3. The titanium dioxide tailing curing method according to claim 1, wherein the step 2) is specifically as follows:
a) carrying out a slime curing ratio test and physical and mechanical property indexes of different cements, water-cement ratios and cement mixing amounts at different ages to determine the slime curing ratio;
b) suitability and reasonable formula suggestion for tailing mud and water treatment by stirring method
Preparing tailing slurry cement mixing soil samples according to the slurry solidification proportion determined in the step a), preparing the samples according to ages of 28d and 90d, and performing water content, density and unconfined compressive strength tests on each sample to determine the variety, mixing proportion and pile spacing of cement;
c) and c, performing field test on the cement soil mixing piles, performing test verification on the reinforcement effect of the mixing piles for the foundation, wherein the cement varieties, the mixing proportion and the pile spacing are determined in the step b), and determining the cement varieties, the mixing proportion and the pile spacing under the condition of meeting the designed bearing capacity.
4. The titanium dioxide tailings solidification method as defined in claim 1, wherein in step 3), the mixing piles are arranged in a regular triangular row, and positioning is performed by means of watson T5 gps (rtk) measurement.
5. The titanium dioxide tailing curing method according to claim 1, wherein in step 5), a quantitative container is adopted to control the water amount in the cement paste, and the cement paste can be prepared after the mixer sinks to the designed depth.
6. The titanium white tailings solidification method as claimed in claim 1, wherein the sinking speed is less than or equal to 0.8m/min, and the working current is not greater than 70A.
7. The titanium white tailings solidification method as claimed in claim 1, wherein the first guniting and the second guniting are the same in guniting amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329121.6A CN111501743A (en) | 2020-04-23 | 2020-04-23 | Titanium white tailing curing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329121.6A CN111501743A (en) | 2020-04-23 | 2020-04-23 | Titanium white tailing curing method |
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| CN111501743A true CN111501743A (en) | 2020-08-07 |
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| CN202010329121.6A Pending CN111501743A (en) | 2020-04-23 | 2020-04-23 | Titanium white tailing curing method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201485845U (en) * | 2009-08-19 | 2010-05-26 | 中国瑞林工程技术有限公司 | Tailing dam muddy foundation reinforcing device |
| CN103967495A (en) * | 2014-04-16 | 2014-08-06 | 中钢集团马鞍山矿山研究院有限公司 | Stoping technology for dam slope tailing of tailing dam |
| US20140314498A1 (en) * | 2013-04-19 | 2014-10-23 | Henan Polytech Infrastructure Rehabilitation LTD. | Polymer grouting method for constructing ultra-thin anti-seepage wall |
| CN106592570A (en) * | 2016-12-02 | 2017-04-26 | 中冶沈勘工程技术有限公司 | Foundation treatment process using pre-fabricated compact type iron tailing reinforced bodies |
| CN110409435A (en) * | 2019-08-13 | 2019-11-05 | 中电建十一局工程有限公司 | A kind of novel concrete mixing pile construction method |
-
2020
- 2020-04-23 CN CN202010329121.6A patent/CN111501743A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201485845U (en) * | 2009-08-19 | 2010-05-26 | 中国瑞林工程技术有限公司 | Tailing dam muddy foundation reinforcing device |
| US20140314498A1 (en) * | 2013-04-19 | 2014-10-23 | Henan Polytech Infrastructure Rehabilitation LTD. | Polymer grouting method for constructing ultra-thin anti-seepage wall |
| CN103967495A (en) * | 2014-04-16 | 2014-08-06 | 中钢集团马鞍山矿山研究院有限公司 | Stoping technology for dam slope tailing of tailing dam |
| CN106592570A (en) * | 2016-12-02 | 2017-04-26 | 中冶沈勘工程技术有限公司 | Foundation treatment process using pre-fabricated compact type iron tailing reinforced bodies |
| CN110409435A (en) * | 2019-08-13 | 2019-11-05 | 中电建十一局工程有限公司 | A kind of novel concrete mixing pile construction method |
Non-Patent Citations (2)
| Title |
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| 陈功，岳红宇: "采用水泥土搅拌法处理连云港地区软基的适应性问题", 《现代交通技术》 * |
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Application publication date: 20200807 |