CN113882866A - Construction method of slurry shield filter-pressed mud cake in synchronous grouting - Google Patents
Construction method of slurry shield filter-pressed mud cake in synchronous grouting Download PDFInfo
- Publication number
- CN113882866A CN113882866A CN202111134967.5A CN202111134967A CN113882866A CN 113882866 A CN113882866 A CN 113882866A CN 202111134967 A CN202111134967 A CN 202111134967A CN 113882866 A CN113882866 A CN 113882866A
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- Prior art keywords
- slurry
- mud
- synchronous
- mud cake
- shield
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- 239000002002 slurry Substances 0.000 title claims abstract description 79
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 49
- 238000010276 construction Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 25
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 18
- 239000000440 bentonite Substances 0.000 claims abstract description 18
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000004087 circulation Effects 0.000 claims description 2
- 239000011499 joint compound Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 9
- 239000002689 soil Substances 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000003823 mortar mixing Methods 0.000 abstract 1
- 239000004927 clay Substances 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/0678—Adding additives, e.g. chemical compositions, to the slurry or the cuttings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Ceramic Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a construction method of slurry shield filter-pressed mud cakes in synchronous grouting, which comprises the following steps: the slurry shield is tunneled in the soft viscous stratum to generate slurry; circulating current after screening treatment to increase the viscosity of the slurry; filter pressing to obtain mud cakes; the mud cakes are transported, stored, aired and then crushed into mud cake powder; preparing synchronous mortar for shield synchronous grouting by using the mud cake powder as bentonite, cement, fly ash, sand and water according to a certain proportion; and sending the synchronous mortar back to the slurry shield to participate in synchronous grouting. The invention mainly utilizes the characteristic that a slurry shield is tunneled and constructed in soft and viscous geology, the slurry making capability of the viscous soil is strong, the outward transportation amount of the abandoned slurry pressed into mud cakes is reduced, the mud cakes are used in synchronous grouting according to a certain proportion after being aired and crushed, the mud cakes are thickened and water-preserved, and the pressed clean water is used for synchronous mortar mixing. The bentonite cost is reduced, the outward transportation cost of the waste slurry and the mud cakes is reduced, the low carbon and environmental protection are realized, the zero emission of the waste slurry and mud cakes is realized, and the green and environmental-friendly construction is realized.
Description
Technical Field
The invention relates to the technical field of slurry shield construction, in particular to a construction method of slurry shield filter-pressing mud cakes in synchronous grouting.
Background
With the rapid development of cities, subways become important transportation tools for solving urban traffic jams and facilitating people to go out in many cities. Therefore, many cities are heavily building subway traffic. In the subway construction process, the shield method is basically adopted for construction. In the shield construction, because there is excavation building space in blade disc excavation diameter and the shield section of jurisdiction external diameter, simultaneously because the influence of factors such as geological conditions, groundwater, tunnel buried depth, driving mode, etc. needs to construct subway conveyor system, causes bad phenomena such as stratum deformation, section of jurisdiction dislocation, tunnel seepage easily, consequently, the necessary synchronous grouting material that uses fills up the space behind the section of jurisdiction.
The effect of shield mortar is along with the progress of shield tunnelling, and when section of jurisdiction and shield tail separation, the stratum at this position will lose the support temporarily, leads to section of jurisdiction rear portion to appear the gap deformation or local collapse. Along with the expansion of the loosening range of the surrounding rock, the ground can generate settlement. If the gap is filled with the slurry in time, the deformation or collapse of the stratum can be inhibited, so that the ground is effectively controlled, and therefore, whether the mortar injected into the back is full or not directly influences the ground surface settlement.
The tunnel synchronous grouting slurry adopts cement, fly ash, bentonite, sand and water as raw materials, and the cement influences the setting time and the compressive strength; the fly ash can improve the workability of the slurry; the bentonite has the functions of thickening and water retention, and can improve the stability of the slurry; the sand is used as the slurry aggregate to play a filling role and mainly influences the consistency of the slurry; water is a major factor affecting the rate of bleeding. As the construction is carried out synchronously with the shield construction, the whole synchronous mortar has larger demand, thereby requiring equivalent amount of materials such as high-quality bentonite, fly ash, fine sand and the like.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides the construction method of the slurry shield filter-pressing mud cake in the synchronous grouting, which reduces the cost of bentonite, reduces the cost of transporting waste slurry and mud cake outwards, is low-carbon and environment-friendly, realizes zero emission of the waste slurry and mud cake, and is environment-friendly.
In order to realize the technical effect, the invention provides a construction method of a slurry shield filter-pressing mud cake in synchronous grouting, which comprises the following steps:
the slurry shield is tunneled in the soft viscous stratum to generate slurry;
screening and circulating the slurry to increase the viscosity of the slurry;
carrying out filter pressing treatment on the slurry meeting the viscosity requirement of the mud cake making to obtain a mud cake;
transferring, storing and airing the mud cakes, and then crushing the mud cakes into mud cake powder;
preparing synchronous mortar for shield synchronous grouting by taking the mud cake powder as bentonite and mixing the bentonite with cement, fly ash, sand and water according to a certain proportion;
and sending the synchronous mortar back to the slurry shield to participate in synchronous grouting.
Preferably, the weight mixing ratio of cement, fly ash, mud cake powder, sand and water in the synchronous mortar is 160:400:80:450: 500.
Preferably, the slurry is subjected to pressure filtration treatment by a slurry pressure filter to form a slurry cake, and clear water obtained in the pressure filtration process is used for mixing water for preparing the synchronous mortar after being filtered.
Preferably, the fluid conveying equipment is adopted to circulate the screened mud, and the mud meeting the viscosity requirement of mud cake making is obtained after multiple circulations.
The invention mainly utilizes the characteristic that the slurry shield is used for tunneling construction in soft and viscous geology to comprehensively and comprehensively plan. The clay soil has strong slurry making capacity, reduces the outward transportation amount of the abandoned slurry pressed into mud cakes, dries and crushes the mud cakes, uses the mud cakes as bentonite in synchronous grouting according to a certain proportion, thickens and retains the synchronous mortar, and the pressed clean water is used for mixing the mortar with the synchronous mortar. The bentonite cost is reduced, the outward transportation cost of the waste slurry and the mud cakes is reduced, the low carbon and environmental protection are realized, the zero emission of the waste slurry and mud cakes is realized, and the green and environmental-friendly construction is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a construction method of slurry shield filter-pressing mud cakes in synchronous grouting according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The slurry water pressure shield construction method is that slurry water with various performance indexes reasonably adjusted enters a slurry water bin of the shield construction machine through fluid conveying equipment with 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. The mud is transported away by a vehicle on the field, partial mud water without utilization value is discharged to a waste mud pool after the mud water is precipitated by a precipitation tank, and partial mud water with utilization value is recycled after the performance index is adjusted.
When the slurry shield is used for tunneling a soft and viscous stratum, the stratum slurrying capacity is high, slurry after screening treatment can still be circularly used after being prepared, excessive slurry is generally subjected to filter pressing treatment by using slurry filter pressing equipment, and fine particles in the slurry are compressed into a slurry cake after the filter pressing treatment. The main component of the mud cake is fine particles in the mud, the mud shield line is cohesive soil geology, and the filter-pressed mud cake can be temporarily stored, aired and crushed and serves as bentonite in the synchronous mortar.
Specifically, referring to fig. 1, the invention provides a construction method of a slurry shield filter-pressing mud cake in synchronous grouting, which is suitable for being used in a stratum with strong slurry making capability, such as a soft viscous stratum, of a slurry shield.
The invention relates to a construction method of slurry shield filter-pressed mud cakes in synchronous grouting, which mainly comprises the following steps:
firstly, a slurry shield is tunneled in a soft viscous stratum to generate slurry;
the clay soil is soil containing more clay particles and having smaller water permeability. The compacted product has good water stability, high strength and large capillary action. The water-soluble inorganic salt has fine particles, small and many pores, weak water permeability, expansion and contraction characteristics and mechanical properties which are changed along with the water content. Therefore, the clay has strong slurrying capacity and can be used as bentonite.
Secondly, screening and circulating the slurry to increase the viscosity of the slurry;
and (3) circulating the screened mud by adopting fluid conveying equipment to increase the viscosity of the mud, and circulating for multiple times to obtain the mud meeting the viscosity requirement of mud cake making.
Thirdly, performing filter pressing treatment on the mud which meets the viscosity requirement of mud cake making to obtain mud cakes;
the slurry can be filter-pressed into a mud cake by adopting a slurry filter press, and clear water generated in the filter-pressing process is filtered and then used for mixing water for synchronous mortar, so that zero emission of waste water is achieved.
Fourthly, transferring and storing the mud cakes;
fifthly, drying and crushing the mud cakes to prepare powdery mud cake powder;
sixthly, preparing synchronous mortar for shield synchronous grouting by taking the mud cake powder as bentonite and mixing the bentonite with cement, fly ash, sand and water according to a certain proportion;
wherein, the mixing proportion of the synchronous mortar is as follows: cement: fly ash: mud cake powder: sand: the water is 160:400:80:450:500 (weight ratio), the coagulation time of the prepared slurry is 6-8 h, 28 days, and the compressive strength is not lower than 1.5 Mpa. The mud cake from the soft clay can play the roles of thickening and retaining water for synchronous mortar after being mixed and stirred with cement, sand, fly ash and water according to a certain proportion, and can be used for synchronous grouting.
And seventhly, sending the mixed synchronous mortar back to the slurry shield to participate in synchronous grouting.
The invention mainly utilizes the characteristic that the slurry shield is used for tunneling construction in soft and viscous geology to comprehensively and comprehensively plan. The clay soil has strong slurry making capacity, reduces the outward transportation amount of the abandoned slurry pressed into mud cakes, dries and crushes the mud cakes, uses the mud cakes as bentonite in synchronous grouting according to a certain proportion, thickens and retains the synchronous mortar, and the pressed clean water is used for mixing the mortar with the synchronous mortar. The bentonite cost is reduced, the outward transportation cost of the waste slurry and the mud cakes is reduced, the low carbon and environmental protection are realized, the zero emission of the waste slurry and mud cakes is realized, and the green and environmental-friendly construction is realized.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A construction method of a slurry shield filter-pressed mud cake in synchronous grouting is characterized by comprising the following steps:
the slurry shield is tunneled in the soft viscous stratum to generate slurry;
screening and circulating the slurry to increase the viscosity of the slurry;
carrying out filter pressing treatment on the slurry meeting the viscosity requirement of the mud cake making to obtain a mud cake;
transferring, storing and airing the mud cakes, and then crushing the mud cakes into mud cake powder;
preparing synchronous mortar for shield synchronous grouting by taking the mud cake powder as bentonite and mixing the bentonite with cement, fly ash, sand and water according to a certain proportion;
and sending the synchronous mortar back to the slurry shield to participate in synchronous grouting.
2. The construction method of the slurry shield filter-pressing mud cake in the synchronous grouting according to claim 1, wherein the weight mixing ratio of cement, fly ash, mud cake powder, sand and water in the synchronous mortar is 160:400:80:450: 500.
3. The construction method of the slurry shield filter-pressing mud cake in the synchronous grouting according to claim 1, characterized in that a slurry filter press is adopted to filter-press the slurry into the mud cake, and clean water obtained in the filter-pressing process is used for mixing water for preparing the synchronous mortar after being filtered.
4. The construction method of the slurry shield filter-pressing mud cake in the synchronous grouting according to claim 1, characterized in that the fluid conveying equipment is adopted to circulate the screened mud, and the mud meeting the viscosity requirement of mud cake preparation is obtained after multiple circulations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134967.5A CN113882866A (en) | 2021-09-27 | 2021-09-27 | Construction method of slurry shield filter-pressed mud cake in synchronous grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134967.5A CN113882866A (en) | 2021-09-27 | 2021-09-27 | Construction method of slurry shield filter-pressed mud cake in synchronous grouting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113882866A true CN113882866A (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111134967.5A Pending CN113882866A (en) | 2021-09-27 | 2021-09-27 | Construction method of slurry shield filter-pressed mud cake in synchronous grouting |
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| CN (1) | CN113882866A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1081880A (en) * | 1996-07-17 | 1998-03-31 | Komatsu Ltd | Slurry material and mud material used for underground excavation |
| CN101717225A (en) * | 2009-11-20 | 2010-06-02 | 上海隧道工程股份有限公司 | Grouting slurry recycled by adopting muddy water waste slurry of muddy water balance shield support |
| CN103437786A (en) * | 2013-09-04 | 2013-12-11 | 中建交通建设集团有限公司 | Shield sludge cleansing/recycling/reusing system and method |
| CN103769312A (en) * | 2014-01-09 | 2014-05-07 | 广东华隧建设股份有限公司 | Construction method for processing and recycling slurry shield muck |
| CN103951335A (en) * | 2013-12-13 | 2014-07-30 | 中铁十四局集团有限公司 | Synchronous grouting method for recycling large-diameter waste slurry generated during slurry shield |
| CN106977153A (en) * | 2017-03-08 | 2017-07-25 | 中交第二航务工程局有限公司 | The shield synchronous grouting serous fluid and its construction method prepared using shield discarded slurry |
| 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 |
| CN111533428A (en) * | 2020-04-29 | 2020-08-14 | 杭州天和建设集团有限公司 | Construction method for curing building slurry |
| CN112727503A (en) * | 2021-02-02 | 2021-04-30 | 中建八局轨道交通建设有限公司 | Shield construction slurry applicable to water-rich stratum |
-
2021
- 2021-09-27 CN CN202111134967.5A patent/CN113882866A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1081880A (en) * | 1996-07-17 | 1998-03-31 | Komatsu Ltd | Slurry material and mud material used for underground excavation |
| CN101717225A (en) * | 2009-11-20 | 2010-06-02 | 上海隧道工程股份有限公司 | Grouting slurry recycled by adopting muddy water waste slurry of muddy water balance shield support |
| CN103437786A (en) * | 2013-09-04 | 2013-12-11 | 中建交通建设集团有限公司 | Shield sludge cleansing/recycling/reusing system and method |
| CN103951335A (en) * | 2013-12-13 | 2014-07-30 | 中铁十四局集团有限公司 | Synchronous grouting method for recycling large-diameter waste slurry generated during slurry shield |
| CN103769312A (en) * | 2014-01-09 | 2014-05-07 | 广东华隧建设股份有限公司 | Construction method for processing and recycling slurry shield muck |
| CN106977153A (en) * | 2017-03-08 | 2017-07-25 | 中交第二航务工程局有限公司 | The shield synchronous grouting serous fluid and its construction method prepared using shield discarded slurry |
| 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 |
| CN111533428A (en) * | 2020-04-29 | 2020-08-14 | 杭州天和建设集团有限公司 | Construction method for curing building slurry |
| CN112727503A (en) * | 2021-02-02 | 2021-04-30 | 中建八局轨道交通建设有限公司 | Shield construction slurry applicable to water-rich stratum |
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