CN113790057A - Slurry shield filter-pressing mud cake re-slurrying construction method - Google Patents
Slurry shield filter-pressing mud cake re-slurrying construction method Download PDFInfo
- Publication number
- CN113790057A CN113790057A CN202111043647.9A CN202111043647A CN113790057A CN 113790057 A CN113790057 A CN 113790057A CN 202111043647 A CN202111043647 A CN 202111043647A CN 113790057 A CN113790057 A CN 113790057A
- Authority
- CN
- China
- Prior art keywords
- slurry
- mud
- mud cake
- regenerated
- construction method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 95
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000003825 pressing Methods 0.000 title claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 13
- 239000004927 clay Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 10
- 230000005641 tunneling Effects 0.000 claims description 7
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 6
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 8
- 239000000440 bentonite Substances 0.000 abstract description 3
- 229910000278 bentonite Inorganic materials 0.000 abstract description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 8
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
Abstract
The invention discloses a mud-water shield filter-pressing mud cake re-slurrying construction method, which is characterized in that mud generated by the driving of a mud-water shield machine in a viscous geological formation is utilized to filter-press to obtain a viscous soil mud cake for the driving construction of the mud-water shield machine in gravel or rock stratum, the slurry-making capability of the viscous soil is strong, waste slurry is filter-pressed into the mud cake, slurry is re-slurried in the rock stratum of the gravel layer, the cost of bentonite is reduced, and the cost of waste slurry and mud cake outward transportation is reduced. The invention solves the problem that the existing slurry-water pressurizing shield construction method has high transportation cost because the vehicle is used for transporting the soil outside the vehicle to separate the generated soil and the slurry water.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a mud shield filter-pressing mud cake re-slurrying construction method.
Background
The slurry balance shield is characterized in that slurry meeting the construction requirement pressure is injected into a sealed cabin formed between a cutting cutter head and a partition plate, so that a mud film is formed on an excavation surface, a front soil body is supported, the mud film on the surface layer of the soil body is cut by the cutter head arranged on the front surface, the slurry enters the sealed cabin from the opening of the cutter head and is mixed with slurry to form high-density slurry, and the high-density slurry is conveyed to the ground by a sludge discharge pump and a pipeline for treatment.
The existing slurry pressure shield construction method is that slurry with various performance indexes reasonably adjusted enters a working bin of a shield machine through fluid conveying equipment and has certain pressure and flow, is mixed with soil cut by a cutter head and then is discharged, and is conveyed to slurry water treatment equipment through the fluid conveying equipment to separate the soil and slurry water. Soil is transported away by vehicles on a construction site, and the problem of high cost of transporting soil slurry outside exists.
Disclosure of Invention
In order to overcome the defects in the prior art, a mud-water shield filter-pressing mud cake re-slurrying construction method is provided so as to solve the problem that the transportation cost is high when a vehicle is used for transporting away the mud and muddy water generated by the existing mud-water pressurizing shield construction method.
In order to realize the purpose, the construction method for re-slurrying the mud cake through filter pressing of the slurry shield comprises the following steps:
carrying out filter pressing on slurry generated by tunneling in a cohesive soil stratum by a slurry shield machine to obtain a cohesive soil mud cake;
crushing the clay mud cake to obtain clay mud powder;
when the slurry shield machine tunnels into a sand layer or a rock stratum, preparing the clay mud powder, sodium carboxymethylcellulose, sodium carbonate and water to obtain regenerated slurry;
and conveying the regenerated slurry to a slurry bin of the slurry shield machine for the slurry shield machine to tunnel in the sand layer or the rock stratum.
Further, the step of crushing the clay mud cake to obtain clay mud powder comprises crushing the clay mud cake and airing to obtain the clay mud powder.
Further, the mixing ratio of the regenerated mud is clay mud powder: sodium carboxymethylcellulose: sodium carbonate: 400kg of water: 2.2 kg: 11 kg: 870 kg.
Furthermore, the specific gravity of the regenerated slurry is 1.1-1.20.
Furthermore, the viscosity of the regeneration slurry is 20-30', the sand content of the regeneration slurry is 15-25%, the water precipitation amount of the regeneration slurry is 5%, and the pH value of the regeneration slurry is 8.
Further, the regenerated slurry is obtained after being prepared, and is conveyed into a slurry inlet pool and conveyed into the slurry bin through a slurry circulation system.
The slurry shield filter-pressing mud cake re-slurrying construction method has the beneficial effects that the slurry generated by the slurry shield machine in the tunneling of the viscous geological layer is utilized to filter-press the obtained viscous soil mud cake for the tunneling construction of the slurry shield machine in the gravel or rock stratum, the slurry making capability of the viscous soil is strong, the waste slurry is filter-pressed into the mud cake, the slurry is re-slurried in the rock stratum of the gravel layer, the bentonite cost is reduced, the outward transportation cost of the waste slurry and the mud cake is reduced, the low carbon and environmental protection effects are realized, the zero emission of the waste slurry mud cake is realized, and the environment-friendly construction is realized.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to examples.
The invention provides a slurry reconstruction construction method for filter-pressed mud cakes of a slurry shield, which comprises the following steps:
s1: and (3) carrying out filter pressing on slurry generated by tunneling in the cohesive soil stratum by the slurry shield machine to obtain a cohesive soil mud cake.
S2: and crushing the clay mud cake to obtain clay mud powder.
Specifically, the clay mud powder is obtained by crushing, transferring and airing the clay mud cakes. Storing the clay mud powder for later use.
S3: when the slurry shield machine tunnels into a sand layer or a rock stratum, clay mud powder, sodium carboxymethyl cellulose, sodium carbonate and water are prepared to obtain regenerated slurry.
In a preferred embodiment, the mixing ratio of the regenerated slurry is clay powder: sodium carboxymethylcellulose: sodium carbonate: 400kg of water: 2.2 kg: 11 kg: 870 kg.
Wherein the specific gravity of the regenerated slurry is 1.1-1.20.
The viscosity of the regenerated slurry is 20-30'.
The sand content of the regenerated slurry is 15-25%.
Water precipitation of the regenerated slurry: 5 percent.
PH of the regenerated slurry: 8.
s4: and conveying the regenerated slurry to a slurry bin of the slurry shield machine for the slurry shield machine to tunnel in a sand layer or a rock stratum.
After preparing the regenerated slurry, conveying the regenerated slurry to a slurry inlet tank;
and the slurry circulation system of the slurry shield machine conveys the regenerated slurry in the slurry inlet pool to a slurry bin of the slurry shield machine for the slurry shield machine to tunnel in a sand layer or a rock stratum.
The slurry shield filter-pressing mud cake re-slurrying construction method provided by the invention has the advantages that the slurry generated by the slurry shield machine in the tunneling of the viscous geological formation is utilized to filter-press to obtain the viscous soil mud cake for the slurry shield machine in the tunneling construction of gravel or rock strata, the slurry making capability of the viscous soil is strong, the waste slurry is filter-pressed into the mud cake, the slurry is re-slurried in the rock stratum of the gravel layer, the bentonite cost is reduced, the waste slurry and mud cake outward transportation cost is reduced, the low carbon and environmental protection effects are realized, the zero emission of the waste slurry mud cake is realized, and the environment-friendly construction is realized. The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed.
It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (6)
1. A construction method for mud cake re-slurrying by mud shield filter pressing is characterized by comprising the following steps:
carrying out filter pressing on slurry generated by tunneling in a cohesive soil stratum by a slurry shield machine to obtain a cohesive soil mud cake;
crushing the clay mud cake to obtain clay mud powder;
when the slurry shield machine tunnels into a sand layer or a rock stratum, preparing the clay mud powder, sodium carboxymethylcellulose, sodium carbonate and water to obtain regenerated slurry;
and conveying the regenerated slurry to a slurry bin of the slurry shield machine for the slurry shield machine to tunnel in the sand layer or the rock stratum.
2. The slurry shield filter-pressing mud cake re-slurrying construction method as claimed in claim 1, wherein the step of crushing the clay mud cake to obtain clay mud powder comprises crushing the clay mud cake and airing to obtain the clay mud powder.
3. The slurry shield filter-pressing mud cake re-slurrying construction method according to claim 1, wherein the mixing ratio of the regenerated mud is clay mud powder: sodium carboxymethylcellulose: sodium carbonate: 400kg of water: 2.2 kg: 11 kg: 870 kg.
4. The slurry shield filter-pressing mud cake re-slurrying construction method according to claim 3, wherein the specific gravity of the regenerated mud is 1.1-1.20.
5. The slurry shield filter-pressing mud cake re-slurrying construction method as claimed in claim 4, wherein the viscosity of the regenerated slurry is 20-30 ", the sand content of the regenerated slurry is 15-25%, the water precipitation amount of the regenerated slurry is 5%, and the pH value of the regenerated slurry is 8.
6. The mud shield filter-pressing mud cake re-slurrying construction method as claimed in claim 1, wherein the regenerated mud is obtained after preparation, conveyed into a mud inlet tank and conveyed into the mud sump through a mud circulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111043647.9A CN113790057A (en) | 2021-09-07 | 2021-09-07 | Slurry shield filter-pressing mud cake re-slurrying construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111043647.9A CN113790057A (en) | 2021-09-07 | 2021-09-07 | Slurry shield filter-pressing mud cake re-slurrying construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113790057A true CN113790057A (en) | 2021-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111043647.9A Pending CN113790057A (en) | 2021-09-07 | 2021-09-07 | Slurry shield filter-pressing mud cake re-slurrying construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113790057A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735971A (en) * | 2022-02-28 | 2022-07-12 | 中铁隧道局集团有限公司 | Composite paste and preparation and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060796A (en) * | 2015-08-27 | 2015-11-18 | 河海大学 | Slurry for slurry shield sand stratum tunneling and preparation method thereof |
| CN107416994A (en) * | 2017-08-08 | 2017-12-01 | 中铁隧道集团二处有限公司 | A kind of mud multi-stage separation method that slurry shield machine is constructed in fine grained stratum |
| CN110436836A (en) * | 2019-08-21 | 2019-11-12 | 河海大学 | SCAP formula earth pressure balanced shield, EPBS opens the cabin with mud and its preparation method |
| CN111606431A (en) * | 2020-05-09 | 2020-09-01 | 中铁隧道集团二处有限公司 | Method and system for circulating waste slurry in tunneling of shield in weathered argillaceous siltstone stratum |
-
2021
- 2021-09-07 CN CN202111043647.9A patent/CN113790057A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060796A (en) * | 2015-08-27 | 2015-11-18 | 河海大学 | Slurry for slurry shield sand stratum tunneling and preparation method thereof |
| CN107416994A (en) * | 2017-08-08 | 2017-12-01 | 中铁隧道集团二处有限公司 | A kind of mud multi-stage separation method that slurry shield machine is constructed in fine grained stratum |
| CN110436836A (en) * | 2019-08-21 | 2019-11-12 | 河海大学 | SCAP formula earth pressure balanced shield, EPBS opens the cabin with mud and its preparation method |
| CN111606431A (en) * | 2020-05-09 | 2020-09-01 | 中铁隧道集团二处有限公司 | Method and system for circulating waste slurry in tunneling of shield in weathered argillaceous siltstone stratum |
Non-Patent Citations (2)
| Title |
|---|
| 李飞等: "土力学与基础工程", vol. 1, 31 January 2012, 武汉理工大学出版社, pages: 31 * |
| 王靖等: "泥水平衡盾构泥浆分离调制技术", 山西建筑, vol. 46, no. 12, pages 154 - 156 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735971A (en) * | 2022-02-28 | 2022-07-12 | 中铁隧道局集团有限公司 | Composite paste and preparation and application thereof |
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