WO2023123141A1 - Filling material and use thereof - Google Patents

Filling material and use thereof Download PDF

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Publication number
WO2023123141A1
WO2023123141A1 PCT/CN2021/142740 CN2021142740W WO2023123141A1 WO 2023123141 A1 WO2023123141 A1 WO 2023123141A1 CN 2021142740 W CN2021142740 W CN 2021142740W WO 2023123141 A1 WO2023123141 A1 WO 2023123141A1
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WO
WIPO (PCT)
Prior art keywords
component
gum
support material
stabilizer
biological
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PCT/CN2021/142740
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French (fr)
Chinese (zh)
Inventor
李嘉晨
王祺
郭丽莉
熊静
李书鹏
辛成
刘亚茹
薛晋美
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北京建工环境修复股份有限公司
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Priority to PCT/CN2021/142740 priority Critical patent/WO2023123141A1/en
Publication of WO2023123141A1 publication Critical patent/WO2023123141A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/10—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables

Definitions

  • the invention belongs to the technical field of material preparation, and in particular relates to a filling material and its application.
  • Groundwater remediation technology is a hot issue in the field of environmental research. A lot of research has been done on the remediation of groundwater pollution at home and abroad.
  • the extraction treatment is the most commonly used technology. This method can effectively limit the polluted area to the upstream of the extraction well, but it has many defects as a long-term groundwater treatment method. If it can only limit the further spread of pollution, it cannot be repaired on site, and the repair cost is expensive. At the same time, it may also cause waste of groundwater resources and destroy the original local ecological environment, and cannot fundamentally solve the problem of groundwater pollution restoration.
  • the permeable reactive wall is an emerging method for in-situ removal of polluted components in groundwater and soil. It has the advantages of low price, long service life, convenient installation and construction, and good treatment effect.
  • the conventional construction method of the permeable reactive wall is to excavate the trench and then fill it with filler or aggregate.
  • the construction techniques include direct filling, sheet pile support filling and caisson filling, etc.
  • Chinese patent document CN104150613A discloses a permeable reaction wall filling material, system and filling method for groundwater nitrate biological removal. It is composed of a mixture of bacteria-enriched water treatment fillers. The process inlet and outlet areas of the permeable reaction wall system are filled with water treatment filter materials, and the process reaction zone is filled with a mixture of quartz sand or basalt and filler materials. Bacteria-enriched water treatment fillers The domesticated denitrifying bacteria were inoculated on the surface.
  • This patent discloses the filler and repair system of the permeable reaction wall technology, which only solves the priority of the reaction zone material due to the large porosity when the permeable reaction wall is built and operated.
  • the technical problem to be solved by the present invention is to overcome the poor support ability of the trench wall and easy collapse in the prior art during the construction of the permeable reaction wall, which leads to uneven formation of the permeable reaction wall and the loss of part or all of the pollutants.
  • the present invention provides the following technical solutions.
  • the invention provides a support material for building a permeable reactive wall, which includes a first component and a second component; the first component includes biological glue, a first stabilizer and a second stabilizer;
  • the biological gum comprises guar gum
  • the biological gum also includes at least one of xanthan gum, gum arabic, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum;
  • the second component is a hydrolyzate
  • the mass fraction of guar gum in the bio-glue is at least 40%.
  • the mass fraction of guar gum in the bio-glue is at least 60%.
  • the biological gum comprises guar gum and xanthan gum
  • the biological gum includes guar gum and xanthan gum with a mass ratio of (60-90):(10-40).
  • the mass concentration of the first component is 2-8g/L.
  • the mass ratio of the biological glue, the first stabilizer and the second stabilizer is (80-95):(5-15):(0.1-2).
  • the first stabilizer is at least one of sodium carbonate, sodium bicarbonate, sodium hydroxide and potassium hydroxide;
  • the second stabilizer is at least one of dacenolon, calcium cyanamide, azoxystrobin, chlorobromoisocyanuric acid, dichlorine hexoxide, and trichloroisocyanuric acid.
  • the hydrolyzate is biological hydrolyzate or chemical hydrolyzate.
  • the mass concentration of the biological hydrolyzate is 0.5-5g/L
  • the biological hydrolyzate is at least one of mannanase, galactomannanase, mannooligosaccharidease, mannosidase, rhamnosidase and galactase;
  • the chemical hydrolyzate is an acidic liquid.
  • the pH of the chemical hydrolyzate is 2-5.
  • the chemical degradation solution is one or more of hydrochloric acid, sulfuric acid, acetic acid, and alum solution.
  • the chemical degradation solution cannot react violently with the filler in the osmotic reaction wall, nor can it be too acidic, but it can be combined with biological glue. Reaction, decomposition of bio-glue.
  • the present invention also provides a method for constructing a permeable reactive wall, which uses the above-mentioned supporting material as a raw material.
  • the construction method includes the following steps,
  • Construct the permeable reaction wall according to the conventional method, inject the first component while excavating the ditch, wait for filler or aggregate to be loaded, and inject the second component after the permeable reaction wall is constructed.
  • the construction steps of the permeable reactive wall specifically include,
  • the filler can be at least one of iron powder, sawdust, zeolite and activated carbon;
  • the aggregate is quartz sand and/or or river sand;
  • the support material provided by the invention for building permeable reactive walls comprises a first component and a second component; the first component comprises biological glue, the first stabilizer and the second stabilizer
  • the biological gum includes guar gum; the biological gum also includes at least one of xanthan gum, gum arabic, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum; the second The component is a hydrolyzate.
  • the support material is used in the construction of the permeable reaction wall, since the first component has a certain viscosity, there will be no problem of uneven filling when filling the reaction wall with filler or aggregate. Furthermore, the first component and the second component are used together. During the construction of the permeable reaction wall, the first component improves the support of the ditch wall. After the construction of the reaction wall is completed, the second component decomposes the second component. A component that does not affect the permeability coefficient of the permeable reactive wall.
  • bioglue in the support material enters the soil and blocks the gaps between soil particles, providing high hydrostatic pressure, and the soil in contact with the support material is not easy to disperse and collapse; on the other hand
  • bioglue has a certain viscosity, which provides resistance when filling fillers or aggregates in the permeable reaction wall, so that fillers or aggregates with different densities and sizes will not disperse during the falling process when filling the reaction wall, resulting in filling uneven problem.
  • Bio-gum includes at least 40% guar gum by mass fraction, combined with at least one of xanthan gum, acacia gum, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum
  • the effect can keep the physical properties of bio-glue unchanged for a long time, which is convenient for construction schedule arrangement.
  • the compound bio-glue of the present invention has a higher viscosity and can reach a very high viscosity with a small dosage, reducing the amount of bio-glue in the support material.
  • guar gum has strong thixotropy and strong shear thinning effect, and the content of guar gum in the compounded bio-glue is controlled not less than 40%, which can make the compounded bio-glue
  • concentration is relatively viscous in a static state, and will become thinner in a stirring or pumping state, which not only ensures the technical effect of bio-glue, but also facilitates preparation, transportation and construction, and the obtained support material also shows better stability.
  • the present invention can reduce the consumption of bio-glue in the support material by optimizing the amount of guar gum, which saves costs; the compounded bio-glue is stable to temperature and acid-base Higher, more heat-resistant, more resistant to acid and alkali environments than a single type of bio-glue, making the support material suitable for more sites and less affected by weather during construction. Further, the compounded bio-glue has stronger thixotropy, stronger shear thinning effect, and is convenient for preparation, transportation and construction; and the bio-glue has better solubility, is more soluble in water, and has a faster hydration rate , can quickly reach the target viscosity, reducing the preparation time during construction.
  • the second stabilizer can make the compound bio-glue more stable.
  • the bio-glue is easy to decompose in acidic solution and loses its properties.
  • the first stabilizer can stabilize the pH value.
  • the performance of the bio-glue can be improved on the original basis. Keep it for about 20 hours.
  • Bio-glue is easy to breed microorganisms in the aqueous solution state, so that the bio-glue is decomposed and loses its performance. When it is used in the construction of the reaction wall, it will reduce the performance of the reaction wall.
  • the second stabilizer can inhibit the growth of microorganisms, so that the performance of the bio-glue is on the original basis. Keep it up for 13-25h.
  • the second stabilizer has the characteristic of self-decomposition, will not remain in the environment, and has no pollution to the environment.
  • the support material of the present invention When building a permeable reaction wall, inject the support material of the present invention, and when filling filler or aggregate, because the support material is injected in the reaction wall, the first component in the support material has a certain viscosity, and the filler or bone When the material is poured from the top of the ditch, it tends to agglomerate and slowly falls to the bottom of the ditch. There will be no separation of fillers or aggregates, and there will be no problem of uneven filling.
  • the second component is a hydrolyzed solution.
  • the second component can react with the biological glue in the first component and decompose it without affecting the performance of the osmotic reaction wall.
  • the coefficient of permeability which enables an osmotically reactive wall to remediate groundwater or soil.
  • Biological hydrolyzate or chemical hydrolyzate can be configured according to the needs of different usage scenarios to decompose excess biological glue, so that the permeable reaction wall can quickly reach the design required permeability coefficient after construction, and start to restore soil and groundwater.
  • different types of hydrolyzate will have different gains to the treatment effect of the permeable reactive wall.
  • the biological hydrolyzate can enhance the microbial activity inside the permeable reaction wall during operation, and obtain stronger treatment capacity for heavy metals and organic pollutants
  • the chemical hydrolyzate can activate the active filler of the partially permeable reaction wall, making it resistant to pollution Enhanced processing efficiency.
  • This embodiment provides a support material, including a first component and a second component;
  • the first component comprises guar gum, xanthan gum, sodium bicarbonate and datamone with a mass ratio of 54:36:8:2, and the preparation method of the first component comprises, combining guar gum, xanthan gum , sodium bicarbonate and datamon were mixed evenly, added to water, and mixed evenly to obtain the first component whose concentration was 2g/L.
  • the second component includes mannanase, and the mannanase is dissolved in water at 0.5 g/L to obtain the second component.
  • This embodiment provides a support material, including a first component and a second component;
  • the first component comprises guar gum, xanthan gum, mannan, sodium bicarbonate and azoxystrobin with a mass ratio of 59.5:17:8.5:13:2, and the preparation method of the first component comprises: Yeldou gum, xanthan gum, mannan, sodium bicarbonate and azoxystrobin were mixed uniformly, added to water, and mixed uniformly to obtain the first component with a concentration of 5 g/L.
  • the second component includes galactomannanase and mannanase with a mass ratio of 80:20, and galactomannanase and mannanase are dissolved in water to obtain a concentration of the second group of 2g/L point.
  • This embodiment provides a support material, including a first component and a second component;
  • the first component comprises guar gum, gum arabic, xanthan gum, sodium hydroxide and chlorobromoisocyanuric acid with a mass ratio of 57:28.5:8.5:5:1, and the preparation method of the first component comprises, Guar gum, gum arabic, xanthan gum, sodium hydroxide and chlorobromoisocyanuric acid were mixed uniformly, added to water, and mixed uniformly to obtain the first component with a concentration of 7 g/L.
  • the second component includes galactomannanase and rhamnosidase with a mass ratio of 75:25, and galactomannanase and rhamnosidase are dissolved in water to obtain a concentration of 3g/L for the second group point.
  • This embodiment provides a support material, including a first component and a second component;
  • the first component comprises guar gum, carrageenan, sodium bicarbonate and calcium cyanamide that the mass ratio is 68:17:14.6:0.4, and the preparation method of the first component comprises, the guar gum, carrageenan , sodium bicarbonate and calcium cyanamide were uniformly mixed, added to water, and mixed uniformly to obtain the first component with a concentration of 4g/L.
  • the second component includes galactomannanase and galactase with a mass ratio of 80:20, and galactomannanase and galactase are dissolved in water to obtain a concentration of 1.8g/L for the second component .
  • This embodiment provides a support material, including a first component and a second component;
  • the first component comprises guar gum, xanthan gum, sodium bicarbonate and datammell with a mass ratio of 65:25:8:2, and the preparation method of the first component comprises, combining guar gum, xanthan gum , sodium bicarbonate and datamon were mixed uniformly, added to water, and mixed uniformly to obtain the first component with a concentration of 2g/L.
  • the second component includes mannanase, and the mannanase is dissolved in water at 0.5 g/L to obtain the second component.
  • This comparative example provides a kind of supporting material, comprises first component and second component;
  • the first component is guar gum, the guar gum is dissolved in water, and the first component obtained by mixing evenly to obtain a concentration of 4g/L;
  • the second component is galactomannanase, and the galactomannanase is dissolved in water to obtain the second component with a concentration of 1 g/L.
  • This comparative example provides a kind of supporting material, comprises first component and second component;
  • the first component includes guar gum, xanthan gum, sodium carbonate and datammell with a mass ratio of 18:72:8:2, and the preparation method of the first component comprises: mixing guar gum, xanthan gum, Sodium carbonate and damenon were mixed evenly, added to water, and mixed evenly to obtain the first component with a concentration of 4g/L.
  • the second component is galactomannanase, and the galactomannanase is dissolved in water to obtain the second component with a concentration of 1 g/L.
  • This experimental example provides a construction method of a permeable reactive wall, which specifically includes the following steps:
  • Example 1 The support materials provided in Example 1 and Comparative Examples 1-2 were used to construct permeable reactive walls according to the above method.
  • Embodiment 1 supporting material properties keep situation
  • Example 1 Compared with Comparative Example 1, the permeable reaction wall built in Example 1 is at 25°C under the environment of natural flora, and the time for bioglue to maintain its properties is 25.2h longer than that of Comparative Example 1.
  • the supporting material provided by Example 1 The storage time is longer and it is easier to arrange construction. It shows that the combination of guar gum and xanthan gum can help improve the retention time of the physical properties of the support material.
  • the hydrostatic pressure provided by bioglue is about 10.29kP higher than the hydrostatic pressure of the surrounding soil, which is the minimum hydrostatic pressure in the reaction wall; at the bottom of the ditch, the hydrostatic pressure provided by bioglue The pressure is about 13.72kP higher than the hydrostatic pressure of the surrounding soil, which is the maximum hydrostatic pressure in the reaction wall. Due to the pressure difference, the bioglue can enter the gaps in the surrounding soil to provide support.
  • the viscosity of the bioglue provided by Example 1 is higher.
  • the viscosity of Comparative Example 2 is about 57% lower than that of Example 1.
  • the bioglue in Comparative Example 2 is obtained from the soil particles. Flow away in the crevices, resulting in reduced support; at the same time, the bio-glue needs to be continuously replenished, and the dosage is increased.
  • the sampling positions of the 15 samples are located on the same cross-section perpendicular to the wall, and the sampling positions are respectively 0.5m, 2m, 4m, 6m, and 8m deep underground at the thickness of the reaction wall at 0.25m, 0.5m, and 0.75m. 15 samples.
  • the wall thickness refers to the length of the water flow when the water flow enters the osmotic reaction wall; the underground depth refers to the distance from the ground.
  • the determination method of the iron powder content in the sample use a ten-thousandth balance to weigh 20g of the sample, then put the sample into excess dilute sulfuric acid to completely remove the iron powder, rinse until the solution becomes neutral, then dry it, weigh the mass again, and calculate The difference between two times of quality is the quality of iron powder in the sample, and the quality of iron powder in each sample of embodiment 1 and comparative example 2 is shown in Table 1;

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Abstract

A filling material and the use thereof. The material comprises a first component and a second component, wherein the first component comprises biogum, a first stabilizer and a second stabilizer, the biogum comprising guar gum, and the biogum further comprising at least one of xanthan gum, Arabic gum, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum; and the second component is a hydrolysate. When the material is used for building a permeable reactive barrier, a supporting force can be provided for a trench wall, such that the problem of falling off does not occur on the soil on a trench wall of the reactive barrier, the trench wall also does not collapse, and the built reactive barrier has a uniform shape and has no defects, such that the repair effect of the permeable reactive barrier on soil or underground water is ensured; and plate-shaped support and protection are not needed when the permeable reactive barrier is built, thereby reducing the production cost.

Description

一种填充材料及其应用A kind of filling material and its application 技术领域technical field
本发明属于材料制备技术领域，具体涉及一种填充材料及其应用。The invention belongs to the technical field of material preparation, and in particular relates to a filling material and its application.
背景技术Background technique
地下水修复技术是现在环境领域研究的一个热点问题。国内外对地下水污染的修复进行了大量的研究，抽出处理是应用最普遍的技术，该方法能有效地将污染区限制在抽出井上游，但是其作为一种长期的地下水处理方法则存在许多缺陷，如只能限制污染的进一步扩散，不能够现场就地修复，且修复费用昂贵，同时也可能造成地下水资源的浪费，破坏当地原有的生态环境，不能从根本上解决地下水的污染修复问题。Groundwater remediation technology is a hot issue in the field of environmental research. A lot of research has been done on the remediation of groundwater pollution at home and abroad. The extraction treatment is the most commonly used technology. This method can effectively limit the polluted area to the upstream of the extraction well, but it has many defects as a long-term groundwater treatment method. If it can only limit the further spread of pollution, it cannot be repaired on site, and the repair cost is expensive. At the same time, it may also cause waste of groundwater resources and destroy the original local ecological environment, and cannot fundamentally solve the problem of groundwater pollution restoration.
渗透式反应墙是一种用于原位去除地下水及土壤中污染组分的新兴方法，具有价格便宜、使用寿命长、安装施工方便、处理效果好等优点。渗透式反应墙的常规建造方式是挖掘沟渠后装入填料或骨料，建造技术包括直接装填、板桩支护装填和沉箱式装填等。The permeable reactive wall is an emerging method for in-situ removal of polluted components in groundwater and soil. It has the advantages of low price, long service life, convenient installation and construction, and good treatment effect. The conventional construction method of the permeable reactive wall is to excavate the trench and then fill it with filler or aggregate. The construction techniques include direct filling, sheet pile support filling and caisson filling, etc.
中国专利文献CN104150613A公开了一种用于地下水硝酸盐生物脱除的可渗透反应墙填充材料、***及其填充方法，该可渗透反应墙***填料由生物缓释碳源材料、pH缓冲营养元素材料和菌群富集水处理填料混合组成，可渗透反应墙***的工艺进、出区填充水处理滤料，工艺反应区中填充石英砂或玄武岩与填充材料的混合物，菌群富集水处理填料上接种了经过驯化的土著反硝化菌，该专利公开了可渗透式反应墙技术的填料和修复体系，仅解决了渗透式反应墙建造完成后运行时，反应区材料由于孔隙度大造成的优先流和稳固性差的问题，未解决建造过程中反应墙存在的问题。现有技术关于渗透式反应墙的现场实际应用研究很少。目前渗透式反应墙在施工过程中其沟壁支护情况较差、易坍塌， 导致渗透式反应墙成型不均匀、存在缺陷等问题，使渗透式反应墙丧失部分或全部污染物的修复能力。板桩支护装填与沉箱式装填建造技术虽然在一定程度上会提高沟壁的支护能力，但是仍会出现塌方等问题，且需要采用额外的材料，成本高。进一步地，渗透式反应墙在装入填料或骨料时，不同密度、大小的填料或骨料易分离，出现装填不均匀的问题。Chinese patent document CN104150613A discloses a permeable reaction wall filling material, system and filling method for groundwater nitrate biological removal. It is composed of a mixture of bacteria-enriched water treatment fillers. The process inlet and outlet areas of the permeable reaction wall system are filled with water treatment filter materials, and the process reaction zone is filled with a mixture of quartz sand or basalt and filler materials. Bacteria-enriched water treatment fillers The domesticated denitrifying bacteria were inoculated on the surface. This patent discloses the filler and repair system of the permeable reaction wall technology, which only solves the priority of the reaction zone material due to the large porosity when the permeable reaction wall is built and operated. The problems of flow and poor stability have not solved the problems existing in the reaction wall during the construction process. In the prior art, there are few studies on the field practical application of permeable reactive walls. At present, during the construction process of the permeable reactive wall, the support of the ditch wall is poor and it is easy to collapse, which leads to problems such as uneven formation and defects of the permeable reactive wall, which makes the permeable reactive wall lose part or all of its ability to repair pollutants. Although sheet pile support filling and caisson filling construction technologies can improve the support capacity of the trench wall to a certain extent, problems such as landslides still occur, and additional materials are required, resulting in high costs. Furthermore, when fillers or aggregates are loaded into the permeable reaction wall, fillers or aggregates of different densities and sizes are easily separated, and the problem of uneven filling occurs.
发明内容Contents of the invention
因此，本发明要解决的技术问题在于克服现有技术中在渗透式反应墙建造过程中沟壁支护能力差、易坍塌，进而导致渗透式反应墙成型不均匀，丧失部分或全部污染物的修复能力等缺陷，从而提供了一种填充材料及其应用。Therefore, the technical problem to be solved by the present invention is to overcome the poor support ability of the trench wall and easy collapse in the prior art during the construction of the permeable reaction wall, which leads to uneven formation of the permeable reaction wall and the loss of part or all of the pollutants. The ability to repair such defects, thus providing a filling material and its application.
为此，本发明提供了以下技术方案。For this reason, the present invention provides the following technical solutions.
本发明提供了一种用于建造渗透式反应墙的支护材料，包括第一组分和第二组分；所述第一组分包括生物胶、第一稳定剂和第二稳定剂；The invention provides a support material for building a permeable reactive wall, which includes a first component and a second component; the first component includes biological glue, a first stabilizer and a second stabilizer;
所述生物胶包括瓜尔豆胶；The biological gum comprises guar gum;
所述生物胶还包括黄原胶、***胶、卡拉胶、甘露聚糖、刺槐豆胶、羧甲基纤维素和结兰胶中的至少一种；The biological gum also includes at least one of xanthan gum, gum arabic, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum;
所述第二组分为水解液；The second component is a hydrolyzate;
所述生物胶中瓜尔豆胶的质量分数至少为40％。The mass fraction of guar gum in the bio-glue is at least 40%.
所述生物胶中瓜尔豆胶的质量分数至少为60％。The mass fraction of guar gum in the bio-glue is at least 60%.
所述生物胶包括瓜尔豆胶和黄原胶；The biological gum comprises guar gum and xanthan gum;
所述生物胶包括质量比为(60-90)：(10-40)的瓜尔豆胶和黄原胶。The biological gum includes guar gum and xanthan gum with a mass ratio of (60-90):(10-40).
所述第一组分的质量浓度为2-8g/L。The mass concentration of the first component is 2-8g/L.
所述生物胶、第一稳定剂和第二稳定剂的质量比为(80-95)：(5-15)：(0.1-2)。The mass ratio of the biological glue, the first stabilizer and the second stabilizer is (80-95):(5-15):(0.1-2).
所述第一稳定剂为碳酸钠、碳酸氢钠、氢氧化钠和氢氧化钾中的至少一种；The first stabilizer is at least one of sodium carbonate, sodium bicarbonate, sodium hydroxide and potassium hydroxide;
所述第二稳定剂为棉隆、氰氨化钙、嘧菌酯、氯溴异氰尿酸、六氧化二氯、三氯异氰尿酸中的至少一种。The second stabilizer is at least one of dacenolon, calcium cyanamide, azoxystrobin, chlorobromoisocyanuric acid, dichlorine hexoxide, and trichloroisocyanuric acid.
所述水解液为生物水解液或化学水解液。The hydrolyzate is biological hydrolyzate or chemical hydrolyzate.
所述生物水解液的质量浓度为0.5-5g/L；The mass concentration of the biological hydrolyzate is 0.5-5g/L;
所述生物水解液为甘露聚糖酶、半乳甘露聚糖酶、甘露低聚糖酶、甘露糖酶、鼠李糖苷酶和半乳糖酶中的至少一种；The biological hydrolyzate is at least one of mannanase, galactomannanase, mannooligosaccharidease, mannosidase, rhamnosidase and galactase;
所述化学水解液为酸性液体。The chemical hydrolyzate is an acidic liquid.
所述化学水解液的pH为2-5。The pH of the chemical hydrolyzate is 2-5.
化学降解液为盐酸、硫酸、醋酸、明矾溶液中的一种或几种，化学降解液不能与渗透式反应墙中的填料发生剧烈的化学反应，也不能酸性过强，但可以与生物胶进行反应，分解生物胶。The chemical degradation solution is one or more of hydrochloric acid, sulfuric acid, acetic acid, and alum solution. The chemical degradation solution cannot react violently with the filler in the osmotic reaction wall, nor can it be too acidic, but it can be combined with biological glue. Reaction, decomposition of bio-glue.
本发明还提供了一种渗透式反应墙的建造方法，以上述支护材料作为原料。The present invention also provides a method for constructing a permeable reactive wall, which uses the above-mentioned supporting material as a raw material.
所述建造方法包括如下步骤，The construction method includes the following steps,
按照常规方法建造渗透式反应墙，在开挖沟渠的同时注入所述第一组分，待装入填料或骨料，渗透式反应墙建造完成后注入第二组分。Construct the permeable reaction wall according to the conventional method, inject the first component while excavating the ditch, wait for filler or aggregate to be loaded, and inject the second component after the permeable reaction wall is constructed.
渗透式反应墙的建造步骤具体包括，The construction steps of the permeable reactive wall specifically include,
(1)安装挖掘引导槽；(1) Install the excavation guide groove;
(2)使用挖掘机、贝壳抓斗挖掘机或连续开沟机开挖沟渠，沟渠的宽在2m内，深度不超过50m，长度没有限制；(2) Use an excavator, a shell grab excavator or a continuous trencher to dig a ditch, the width of the ditch is within 2m, the depth does not exceed 50m, and the length is not limited;
(3)在开挖的同时注入支护材料的第一组分；(3) injecting the first component of the support material while excavating;
(4)在开挖的过程中保持第一组分超过地下水水位1m；(4) Keep the first component exceeding the groundwater level by 1m during the excavation process;
(5)挖掘完毕后，安装注入管道或注入井；(5) After the excavation is completed, install the injection pipeline or injection well;
(6)由底部向上部装入填料与骨料的混合物，至距离地面高度30-70cm；其中，填料可以是铁粉、木屑、沸石和活性炭中的至少一种；骨料是石英砂和/或河沙；(6) Fill the mixture of filler and aggregate from the bottom to the top, to a height of 30-70cm from the ground; wherein, the filler can be at least one of iron powder, sawdust, zeolite and activated carbon; the aggregate is quartz sand and/or or river sand;
(7)由注入管道或注入井注入第二组分分解第一组分；或通过注入管道或注入井不断抽出第一组分，在地面与第二组分混合后倒入沟内，使其渗透至填料内，以此方式循环一段时间至第一组分被分解；(7) Decompose the first component by injecting the second component from the injection pipeline or injection well; or continuously extract the first component through the injection pipeline or injection well, mix it with the second component on the ground and pour it into the ditch to make it Penetrate into the filler, and circulate in this way for a period of time until the first component is decomposed;
(8)建设粉土/黏土/水泥制成的上盖，使反应墙上部与地面高度平齐，建造结束。(8) Build a loam cake made of silt/clay/cement so that the top of the reaction wall is at the same height as the ground, and the construction is completed.
本发明技术方案，具有如下优点：The technical solution of the present invention has the following advantages:
1.本发明提供的用于建造渗透式反应墙的支护材料，该支护材料包括第一组分和第二组分；第一组分包括生物胶、第一稳定剂和第二稳定剂；所述生物胶包括瓜尔豆胶；生物胶还包括黄原胶、***胶、卡拉胶、甘露聚糖、刺槐豆胶、羧甲基纤维素和结兰胶中的至少一种；第二组分为水解液。该支护材料用于渗透式反应墙建造时，可以为沟壁提供支撑力，反应墙沟壁上的土壤不会出现脱落等问题，沟壁也不会出现坍塌，建造得到的反应墙成型均匀，不存在缺陷，保证了渗透式反应墙对土壤或地下水的修复作用，且在建造渗透式反应墙时无需板状支护，降低了生产成本。进一步地，将该支护材料用于渗透式反应墙的建造中，由于第一组分具有一定的黏度，在反应墙内装入填料或骨料时， 不会出现装填不均匀的问题。更进一步地，第一组分和第二组分配合使用，在渗透式反应墙建造过程中，第一组分改善沟壁的支护情况，待反应墙建造结束后，第二组分分解第一组分，不会影响渗透式反应墙的渗透系数。1. The support material provided by the invention for building permeable reactive walls, the support material comprises a first component and a second component; the first component comprises biological glue, the first stabilizer and the second stabilizer The biological gum includes guar gum; the biological gum also includes at least one of xanthan gum, gum arabic, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum; the second The component is a hydrolyzate. When the support material is used in the construction of the permeable reaction wall, it can provide support for the ditch wall. The soil on the ditch wall of the reaction wall will not fall off and other problems, and the ditch wall will not collapse. The built reaction wall is evenly formed. , there is no defect, which ensures the restoration effect of the permeable reaction wall on soil or groundwater, and does not require plate support when constructing the permeable reaction wall, which reduces the production cost. Furthermore, when the support material is used in the construction of the permeable reaction wall, since the first component has a certain viscosity, there will be no problem of uneven filling when filling the reaction wall with filler or aggregate. Furthermore, the first component and the second component are used together. During the construction of the permeable reaction wall, the first component improves the support of the ditch wall. After the construction of the reaction wall is completed, the second component decomposes the second component. A component that does not affect the permeability coefficient of the permeable reactive wall.
在建造渗透式反应墙时，一方面该支护材料中的生物胶进入土壤内并堵塞土壤颗粒间的缝隙，提供了较高的静水压力，与支护材料接触的土壤不易分散、坍塌；另一方面，生物胶具有一定的黏度，在渗透式反应墙填充填料或骨料时提供了阻力，使密度、大小不同的填料或骨料在装填反应墙时不会在下落过程分散开，出现装填不均匀的问题。When building a permeable reactive wall, on the one hand, the bioglue in the support material enters the soil and blocks the gaps between soil particles, providing high hydrostatic pressure, and the soil in contact with the support material is not easy to disperse and collapse; on the other hand On the one hand, bioglue has a certain viscosity, which provides resistance when filling fillers or aggregates in the permeable reaction wall, so that fillers or aggregates with different densities and sizes will not disperse during the falling process when filling the reaction wall, resulting in filling uneven problem.
生物胶包括中瓜尔豆胶的质量分数至少为40％，与黄原胶、***胶、卡拉胶、甘露聚糖、刺槐豆胶、羧甲基纤维素和结兰胶中的至少一种配合作用，可以使生物胶的物理特性在较长时间内不发生变化，便于工期安排。复配的生物胶相对于单一的生物胶来说，本发明的复配生物胶的黏度更大，可以在较小的用量下就可以达到很高的黏度，减少了支护材料中生物胶的使用量，节省了成本；瓜尔豆胶的触变性较强，剪切稀化作用较强，控制复配生物胶中瓜尔豆胶含量不低于40％，可以使复配后的生物胶浓度在静止状态下较为粘稠，在搅拌或泵送状态下会变稀，既保证了生物胶的技术效果，又方便了配制、运输和施工，得到的支护材料也呈现更好的稳定性，不易出现分解；当瓜尔豆胶在生物胶中占比低于40％时，会出现装填不均匀的问题。Bio-gum includes at least 40% guar gum by mass fraction, combined with at least one of xanthan gum, acacia gum, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum The effect can keep the physical properties of bio-glue unchanged for a long time, which is convenient for construction schedule arrangement. Compared with the single bio-glue, the compound bio-glue of the present invention has a higher viscosity and can reach a very high viscosity with a small dosage, reducing the amount of bio-glue in the support material. The amount of usage saves the cost; guar gum has strong thixotropy and strong shear thinning effect, and the content of guar gum in the compounded bio-glue is controlled not less than 40%, which can make the compounded bio-glue The concentration is relatively viscous in a static state, and will become thinner in a stirring or pumping state, which not only ensures the technical effect of bio-glue, but also facilitates preparation, transportation and construction, and the obtained support material also shows better stability. , it is not easy to decompose; when the proportion of guar gum in the bio-glue is less than 40%, there will be a problem of uneven filling.
2.本发明提供的支护材料，本发明通过对瓜尔豆胶用量进行优化，可减少支护材料中生物胶的用量，节省了成本；复配的生物胶对温度、酸碱的稳定性更高，比单一种类生物胶更耐热，更耐酸、碱环境，使支护材料适用于更多场地，建造时受天气的影响较小。进一步地，该复配的生物胶的触变性更强，剪切稀化作用更强，便于配制、运输和施工；且该生物胶的溶解性较好，更易溶于水，水化速度更快，可以很快达到目标黏度，减少建造时的准备时间。2. The support material provided by the present invention, the present invention can reduce the consumption of bio-glue in the support material by optimizing the amount of guar gum, which saves costs; the compounded bio-glue is stable to temperature and acid-base Higher, more heat-resistant, more resistant to acid and alkali environments than a single type of bio-glue, making the support material suitable for more sites and less affected by weather during construction. Further, the compounded bio-glue has stronger thixotropy, stronger shear thinning effect, and is convenient for preparation, transportation and construction; and the bio-glue has better solubility, is more soluble in water, and has a faster hydration rate , can quickly reach the target viscosity, reducing the preparation time during construction.
3.本发明提供的支护材料，本发明复配的生物胶、第一稳定剂和第二稳定剂配合作用，第一稳定剂为碳酸钠、碳酸氢钠、氢氧化钠和氢氧化钾中的至少一种，第二稳定剂为棉隆、氰氨化钙、嘧菌酯、氯溴异氰尿酸、六氧化二氯、三氯异氰尿酸中的至少一种，第一稳定剂和第二稳定剂可以使复配生物胶更加稳定，生物胶在酸性溶液中易分解，失去其性能，第一稳定剂可以稳定pH值，加入第一稳定剂后可以使生物胶的性能在原有基础上多保持20h左右。生物胶在水溶液状态下易滋生微生物，使生物胶被分解，失去其性能，用于反应墙建造时，会降低反应墙性能，第二稳定剂可以抑制微生物的滋生，使生物胶性能在原有基础上多保持13-25h。3. The support material provided by the present invention, the composite biological glue of the present invention, the first stabilizer and the second stabilizer cooperate, and the first stabilizer is sodium carbonate, sodium bicarbonate, sodium hydroxide and potassium hydroxide at least one, the second stabilizer is at least one of dacenolon, calcium cyanamide, azoxystrobin, chlorobromoisocyanuric acid, dichlorine hexoxide, trichloroisocyanuric acid, the first stabilizer and the second The second stabilizer can make the compound bio-glue more stable. The bio-glue is easy to decompose in acidic solution and loses its properties. The first stabilizer can stabilize the pH value. After adding the first stabilizer, the performance of the bio-glue can be improved on the original basis. Keep it for about 20 hours. Bio-glue is easy to breed microorganisms in the aqueous solution state, so that the bio-glue is decomposed and loses its performance. When it is used in the construction of the reaction wall, it will reduce the performance of the reaction wall. The second stabilizer can inhibit the growth of microorganisms, so that the performance of the bio-glue is on the original basis. Keep it up for 13-25h.
第二稳定剂具有自分解的特性，不会残留在环境中，对环境无污染。The second stabilizer has the characteristic of self-decomposition, will not remain in the environment, and has no pollution to the environment.
4.本发明提供的支护材料在建造渗透式反应墙中的应用，现有技术在建造渗透式反应墙时，一般是直接开挖或板状支护开挖，开挖后沟壁土壤易出现脱落，建造渗透式反应墙时还会装填填料或骨料，由于填料和骨料的大小、密度、重量等均不相同，装填时，在下落过程中易发生分离，出现装填不均匀的问题。在建造渗透式反应墙时，注入本发明的支护材料，在装填填料或骨料时，由于反应墙内注有支护材料，支护材料中的第一组分具有一定黏度，填料或骨料在从沟顶倾倒下落时倾向于聚团、缓慢下落到沟底，填料或骨料不会出现分离，也不会出现装填不均匀的问题。4. The application of the support material provided by the present invention in building the permeable reaction wall, when the prior art builds the permeable reaction wall, it is generally direct excavation or plank support excavation, and the ditch wall soil is easy to If there is falling off, fillers or aggregates will be filled when building a permeable reaction wall. Since the size, density, and weight of fillers and aggregates are different, when filling, it is easy to separate during the falling process, and the problem of uneven filling occurs. . When building a permeable reaction wall, inject the support material of the present invention, and when filling filler or aggregate, because the support material is injected in the reaction wall, the first component in the support material has a certain viscosity, and the filler or bone When the material is poured from the top of the ditch, it tends to agglomerate and slowly falls to the bottom of the ditch. There will be no separation of fillers or aggregates, and there will be no problem of uneven filling.
在渗透式反应墙建造结束后加入第二组分，第二组分为水解液，第二组分可以与第一组分中生物胶反应，对其进行分解，不会影响渗透式反应墙的渗透系数，使渗透式反应墙能够对地下水或土壤进行修复。Add the second component after the construction of the osmotic reaction wall. The second component is a hydrolyzed solution. The second component can react with the biological glue in the first component and decompose it without affecting the performance of the osmotic reaction wall. The coefficient of permeability, which enables an osmotically reactive wall to remediate groundwater or soil.
生物水解液或化学水解液可依据不同使用场景的需求配置，分解多余的生物胶，使渗透式反应墙在建设后能够很快达到设计要求的渗透系数，开始修复土壤及地下水。其次，不同种类的水解液会对渗透式反应墙的处理效果有不同 的增益。例如，生物水解液可增强渗透式反应墙运行时内部的微生物活动，对重金属及有机物污染物获得更强的处理能力，而化学水解液可以激活部分渗透式反应墙的活性填料，使其对污染物的处理效率增强。Biological hydrolyzate or chemical hydrolyzate can be configured according to the needs of different usage scenarios to decompose excess biological glue, so that the permeable reaction wall can quickly reach the design required permeability coefficient after construction, and start to restore soil and groundwater. Secondly, different types of hydrolyzate will have different gains to the treatment effect of the permeable reactive wall. For example, the biological hydrolyzate can enhance the microbial activity inside the permeable reaction wall during operation, and obtain stronger treatment capacity for heavy metals and organic pollutants, while the chemical hydrolyzate can activate the active filler of the partially permeable reaction wall, making it resistant to pollution Enhanced processing efficiency.
具体实施方式Detailed ways
提供下述实施例是为了更好地进一步理解本发明，并不局限于所述最佳实施方式，不对本发明的内容和保护范围构成限制，任何人在本发明的启示下或是将本发明与其他现有技术的特征进行组合而得出的任何与本发明相同或相近似的产品，均落在本发明的保护范围之内。The following examples are provided in order to further understand the present invention better, are not limited to the best implementation mode, and do not limit the content and protection scope of the present invention, anyone under the inspiration of the present invention or use the present invention Any product identical or similar to the present invention obtained by combining features of other prior art falls within the protection scope of the present invention.
实施例中未注明具体实验步骤或条件者，按照本领域内的文献所描述的常规实验步骤的操作或条件即可进行。所用试剂或仪器未注明生产厂商者，均为可以通过市购获得的常规试剂产品。If no specific experimental steps or conditions are indicated in the examples, it can be carried out according to the operation or conditions of the conventional experimental steps described in the literature in this field. The reagents or instruments used, whose manufacturers are not indicated, are all commercially available conventional reagent products.
实施例1Example 1
本实施例提供了一种支护材料，包括第一组分和第二组分；This embodiment provides a support material, including a first component and a second component;
第一组分包括质量比为54:36:8:2的瓜尔豆胶、黄原胶、碳酸氢钠和棉隆，第一组分的制备方法包括，将瓜尔豆胶、黄原胶、碳酸氢钠和棉隆混合均匀，加到水中，混合均匀，得到浓度为2g/L的第一组分。The first component comprises guar gum, xanthan gum, sodium bicarbonate and datamone with a mass ratio of 54:36:8:2, and the preparation method of the first component comprises, combining guar gum, xanthan gum , sodium bicarbonate and datamon were mixed evenly, added to water, and mixed evenly to obtain the first component whose concentration was 2g/L.
第二组分包括甘露聚糖酶，以0.5g/L将甘露聚糖酶溶于水，得到第二组分。The second component includes mannanase, and the mannanase is dissolved in water at 0.5 g/L to obtain the second component.
实施例2Example 2
本实施例提供了一种支护材料，包括第一组分和第二组分；This embodiment provides a support material, including a first component and a second component;
第一组分包括质量比为59.5:17:8.5:13:2的瓜尔豆胶、黄原胶、甘露聚糖、碳酸氢钠和嘧菌酯，第一组分的制备方法包括，将瓜尔豆胶、黄原胶、甘露聚糖、碳酸氢钠和嘧菌酯混合均匀，加到水中，混合均匀，得到浓度为5g/L的第 一组分。The first component comprises guar gum, xanthan gum, mannan, sodium bicarbonate and azoxystrobin with a mass ratio of 59.5:17:8.5:13:2, and the preparation method of the first component comprises: Yeldou gum, xanthan gum, mannan, sodium bicarbonate and azoxystrobin were mixed uniformly, added to water, and mixed uniformly to obtain the first component with a concentration of 5 g/L.
第二组分包括质量比为80:20的半乳甘露聚糖酶和甘露聚糖酶，将半乳甘露聚糖酶和甘露聚糖酶溶于水，得到浓度为2g/L的第二组分。The second component includes galactomannanase and mannanase with a mass ratio of 80:20, and galactomannanase and mannanase are dissolved in water to obtain a concentration of the second group of 2g/L point.
实施例3Example 3
本实施例提供了一种支护材料，包括第一组分和第二组分；This embodiment provides a support material, including a first component and a second component;
第一组分包括质量比为57:28.5:8.5:5:1的瓜尔豆胶、***胶、黄原胶、氢氧化钠和氯溴异氰尿酸，第一组分的制备方法包括，将瓜尔豆胶、***胶、黄原胶、氢氧化钠和氯溴异氰尿酸混合均匀，加到水中，混合均匀，得到浓度为7g/L的第一组分。The first component comprises guar gum, gum arabic, xanthan gum, sodium hydroxide and chlorobromoisocyanuric acid with a mass ratio of 57:28.5:8.5:5:1, and the preparation method of the first component comprises, Guar gum, gum arabic, xanthan gum, sodium hydroxide and chlorobromoisocyanuric acid were mixed uniformly, added to water, and mixed uniformly to obtain the first component with a concentration of 7 g/L.
第二组分包括质量比为75:25的半乳甘露聚糖酶和鼠李糖苷酶，将半乳甘露聚糖酶和鼠李糖苷酶溶于水，得到浓度为3g/L的第二组分。The second component includes galactomannanase and rhamnosidase with a mass ratio of 75:25, and galactomannanase and rhamnosidase are dissolved in water to obtain a concentration of 3g/L for the second group point.
实施例4Example 4
本实施例提供了一种支护材料，包括第一组分和第二组分；This embodiment provides a support material, including a first component and a second component;
第一组分包括质量比为68:17:14.6:0.4的瓜尔豆胶、卡拉胶、碳酸氢钠和氰氨化钙，第一组分的制备方法包括，将瓜尔豆胶、卡拉胶、碳酸氢钠和氰氨化钙混合均匀，加到水中，混合均匀，得到浓度为4g/L的第一组分。The first component comprises guar gum, carrageenan, sodium bicarbonate and calcium cyanamide that the mass ratio is 68:17:14.6:0.4, and the preparation method of the first component comprises, the guar gum, carrageenan , sodium bicarbonate and calcium cyanamide were uniformly mixed, added to water, and mixed uniformly to obtain the first component with a concentration of 4g/L.
第二组分包括质量比为80:20的半乳甘露聚糖酶和半乳糖酶，将半乳甘露聚糖酶和半乳糖酶溶于水，得到浓度为1.8g/L的第二组分。The second component includes galactomannanase and galactase with a mass ratio of 80:20, and galactomannanase and galactase are dissolved in water to obtain a concentration of 1.8g/L for the second component .
实施例5Example 5
本实施例提供了一种支护材料，包括第一组分和第二组分；This embodiment provides a support material, including a first component and a second component;
第一组分包括质量比为65:25:8:2的瓜尔豆胶、黄原胶、碳酸氢钠和棉隆，第一组分的制备方法包括，将瓜尔豆胶、黄原胶、碳酸氢钠和棉隆混合均匀， 加到水中，混合均匀，得到浓度为2g/L的第一组分。The first component comprises guar gum, xanthan gum, sodium bicarbonate and datammell with a mass ratio of 65:25:8:2, and the preparation method of the first component comprises, combining guar gum, xanthan gum , sodium bicarbonate and datamon were mixed uniformly, added to water, and mixed uniformly to obtain the first component with a concentration of 2g/L.
第二组分包括甘露聚糖酶，以0.5g/L将甘露聚糖酶溶于水，得到第二组分。The second component includes mannanase, and the mannanase is dissolved in water at 0.5 g/L to obtain the second component.
对比例1Comparative example 1
本对比例提供了一种支护材料，包括第一组分和第二组分；This comparative example provides a kind of supporting material, comprises first component and second component;
第一组分为瓜尔豆胶，将瓜尔豆胶溶于水，混合均匀得到浓度为4g/L的第一组分；The first component is guar gum, the guar gum is dissolved in water, and the first component obtained by mixing evenly to obtain a concentration of 4g/L;
第二组份为半乳甘露聚糖酶，将半乳甘露聚糖酶溶于水中，得到浓度为1g/L的第二组分。The second component is galactomannanase, and the galactomannanase is dissolved in water to obtain the second component with a concentration of 1 g/L.
对比例2Comparative example 2
本对比例提供了一种支护材料，包括第一组分和第二组分；This comparative example provides a kind of supporting material, comprises first component and second component;
第一组分包括质量比为18:72:8:2的瓜尔豆胶、黄原胶、碳酸钠和棉隆，第一组分的制备方法包括，将瓜尔豆胶、黄原胶、碳酸钠和棉隆混合均匀，加到水中，混合均匀，得到浓度为4g/L的第一组分。第二组分为半乳甘露聚糖酶，将半乳甘露聚糖酶溶于水，得到浓度为1g/L的第二组分。The first component includes guar gum, xanthan gum, sodium carbonate and datammell with a mass ratio of 18:72:8:2, and the preparation method of the first component comprises: mixing guar gum, xanthan gum, Sodium carbonate and damenon were mixed evenly, added to water, and mixed evenly to obtain the first component with a concentration of 4g/L. The second component is galactomannanase, and the galactomannanase is dissolved in water to obtain the second component with a concentration of 1 g/L.
实验例1Experimental example 1
本实验例提供了一种渗透式反应墙的建造方法，具体包括以下步骤：This experimental example provides a construction method of a permeable reactive wall, which specifically includes the following steps:
(1)安装挖掘引导槽；(1) Install the excavation guide groove;
(2)使用挖掘机开挖沟渠，沟渠的宽为1m，深度为8m，长度为50m；(2) Use an excavator to excavate the ditch, the width of the ditch is 1m, the depth is 8m, and the length is 50m;
(3)在开挖的同时注入支护材料的第一组分；(3) injecting the first component of the support material while excavating;
(4)在开挖的过程中保持第一组分的液面高度超过地下水水位1m；(4) Keep the liquid level height of the first component exceeding the groundwater level by 1m during the excavation process;
(5)挖掘完毕后，安装注入管道；(5) After the excavation is completed, install the injection pipeline;
(6)由底部向上部装入填料与骨料的混合物(混合物包括质量比为10:90的酸洗铁粉和河沙)，至距离地面高度50cm；(6) Load the mixture of filler and aggregate (the mixture includes pickling iron powder and river sand with a mass ratio of 10:90) from the bottom to the top to a height of 50cm from the ground;
(7)由注入管道注入第二组分分解第一组分；(7) Injecting the second component into the injection pipeline to decompose the first component;
(8)建设粉土/黏土/水泥制成的上盖，使反应墙上部与地面高度平齐，建造结束。(8) Build a loam cake made of silt/clay/cement so that the top of the reaction wall is at the same height as the ground, and the construction is completed.
按照上述方法分别将实施例1和对比例1-2提供的支护材料用于建造渗透式反应墙。The support materials provided in Example 1 and Comparative Examples 1-2 were used to construct permeable reactive walls according to the above method.
(一)实施例1支护材料性状保持情况(1) Embodiment 1 supporting material properties keep situation
与对比例1相比，采用实施例1建造的渗透式反应墙在25℃、自然菌群环境下，生物胶保持性状的时间比对比例1长25.2h，实施例1提供的支护材料的保存时间更长，更便于安排施工。说明采用瓜尔豆胶与黄原胶复配有助于提高支护材料物理特性的保持时间。Compared with Comparative Example 1, the permeable reaction wall built in Example 1 is at 25°C under the environment of natural flora, and the time for bioglue to maintain its properties is 25.2h longer than that of Comparative Example 1. The supporting material provided by Example 1 The storage time is longer and it is easier to arrange construction. It shows that the combination of guar gum and xanthan gum can help improve the retention time of the physical properties of the support material.
(二)实施例1支护材料的支护情况(2) the support situation of embodiment 1 support material
以实施例1为例，在地下水位处，生物胶提供的静水压力比周围土体的静水压力约高10.29kP，该值为反应墙内最小的静水压力；在沟底，生物胶提供的静水压力比周围土体的静水压力约高13.72kP，该值为反应墙内最大静水压力，由于压力差的存在，生物胶可进入周围土体中的缝隙内，提供支护作用。Taking Example 1 as an example, at the groundwater table, the hydrostatic pressure provided by bioglue is about 10.29kP higher than the hydrostatic pressure of the surrounding soil, which is the minimum hydrostatic pressure in the reaction wall; at the bottom of the ditch, the hydrostatic pressure provided by bioglue The pressure is about 13.72kP higher than the hydrostatic pressure of the surrounding soil, which is the maximum hydrostatic pressure in the reaction wall. Due to the pressure difference, the bioglue can enter the gaps in the surrounding soil to provide support.
与对比例2相比，实施例1提供的生物胶的黏性更高，在静止状态下，对比例2比实施例1的黏度约低57％，对比例2中的生物胶从土壤颗粒的缝隙中流走，导致支护作用降低；同时生物胶需要不断补充，用量增多。Compared with Comparative Example 2, the viscosity of the bioglue provided by Example 1 is higher. In a static state, the viscosity of Comparative Example 2 is about 57% lower than that of Example 1. The bioglue in Comparative Example 2 is obtained from the soil particles. Flow away in the crevices, resulting in reduced support; at the same time, the bio-glue needs to be continuously replenished, and the dosage is increased.
(三)装填均匀性(3) Filling uniformity
从渗透式反应墙中的不同位置取15个样品，测量不同混合物样品中填料(即铁粉)的含量，若15个样品中铁粉质量之间的差距小于2％，则说明装填均匀。15个样品的取样位置位于同一垂直于墙体的截面上，取样位置分别是反应墙墙厚0.25m、0.5m和0.75m处的地下深0.5m、2m、4m、6m、8m处取样，共15个样品。其中墙厚指的是，水流进入渗透式反应墙开始计，水流流动的长度；地下深指的是距离地面的距离。Take 15 samples from different positions in the permeable reaction wall, and measure the content of filler (ie iron powder) in different mixture samples. If the difference between the mass of iron powder in the 15 samples is less than 2%, it means that the filling is uniform. The sampling positions of the 15 samples are located on the same cross-section perpendicular to the wall, and the sampling positions are respectively 0.5m, 2m, 4m, 6m, and 8m deep underground at the thickness of the reaction wall at 0.25m, 0.5m, and 0.75m. 15 samples. Among them, the wall thickness refers to the length of the water flow when the water flow enters the osmotic reaction wall; the underground depth refers to the distance from the ground.
样品中铁粉含量的测定方法：使用万分之一天平称取样品20g，然后将样品放入过量稀硫酸中，完全去除铁粉，冲洗至溶液成中性后烘干，再次称量质量，计算两次质量之差，即为样品中铁粉的质量，实施例1和对比例2各个样品中铁粉的质量见表1；The determination method of the iron powder content in the sample: use a ten-thousandth balance to weigh 20g of the sample, then put the sample into excess dilute sulfuric acid to completely remove the iron powder, rinse until the solution becomes neutral, then dry it, weigh the mass again, and calculate The difference between two times of quality is the quality of iron powder in the sample, and the quality of iron powder in each sample of embodiment 1 and comparative example 2 is shown in Table 1;
表1实施例1和对比例2样品中铁粉质量Iron powder quality in the sample of table 1 embodiment 1 and comparative example 2
Figure PCTCN2021142740-appb-000001
Figure PCTCN2021142740-appb-000001
Figure PCTCN2021142740-appb-000002
Figure PCTCN2021142740-appb-000002
通过表1的结果可以看出，实施例1各个样品中铁含量差距较小，最大值与最小值的差与目标铁粉质量(2g)的比值仅为2.0％。而对比例2各个样品中铁含量差距较大，最大值与最小值的差与目标铁粉质量(2g)的比值为87.6％，说明实施例1装填均匀性优于对比例2。本发明通过控制生物胶中瓜尔豆胶的含量可以提高装填均匀性。It can be seen from the results in Table 1 that the differences in iron content among the samples of Example 1 are small, and the ratio between the difference between the maximum value and the minimum value and the target iron powder mass (2g) is only 2.0%. In Comparative Example 2, the iron content of each sample varies greatly, and the ratio of the difference between the maximum value and the minimum value to the target iron powder mass (2g) is 87.6%, which shows that the filling uniformity of Example 1 is better than that of Comparative Example 2. The invention can improve the filling uniformity by controlling the content of the guar gum in the bio-glue.
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本发明创造的保护范围之中。Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (10)

  1. 一种用于建造渗透式反应墙的支护材料，其特征在于，包括第一组分和第二组分；所述第一组分包括生物胶、第一稳定剂和第二稳定剂；A support material for building a permeable reactive wall, characterized in that it includes a first component and a second component; the first component includes biological glue, a first stabilizer and a second stabilizer;
    所述生物胶包括瓜尔豆胶；The biological gum comprises guar gum;
    所述生物胶还包括黄原胶、***胶、卡拉胶、甘露聚糖、刺槐豆胶、羧甲基纤维素和结兰胶中的至少一种；The biological gum also includes at least one of xanthan gum, gum arabic, carrageenan, mannan, locust bean gum, carboxymethyl cellulose and gellan gum;
    所述第二组分为水解液；The second component is a hydrolyzate;
    所述生物胶中瓜尔豆胶的质量分数至少为40％。The mass fraction of guar gum in the bio-glue is at least 40%.
  2. 根据权利要求1所述的支护材料，其特征在于，所述生物胶中瓜尔豆胶的质量分数至少为60％。The support material according to claim 1, characterized in that the mass fraction of guar gum in the bio-glue is at least 60%.
  3. 根据权利要求1或2所述的支护材料，其特征在于，所述生物胶包括质量比为(60-90)：(10-40)的瓜尔豆胶和黄原胶。The support material according to claim 1 or 2, characterized in that, the biological gum comprises guar gum and xanthan gum with a mass ratio of (60-90):(10-40).
  4. 根据权利要求1-3任一项所述的支护材料，其特征在于，所述第一组分的质量浓度为2-8g/L。The support material according to any one of claims 1-3, characterized in that, the mass concentration of the first component is 2-8g/L.
  5. 根据权利要求1-4任一项所述的支护材料，其特征在于，所述生物胶、第一稳定剂和第二稳定剂的质量比为(80-95)：(5-15)：(0.1-2)。The support material according to any one of claims 1-4, wherein the mass ratio of the bioglue, the first stabilizer and the second stabilizer is (80-95): (5-15): (0.1-2).
  6. 根据权利要求1-5任一项所述的支护材料，所述第一稳定剂为碳酸钠、碳酸氢钠、氢氧化钠和氢氧化钾中的至少一种；The support material according to any one of claims 1-5, the first stabilizer is at least one of sodium carbonate, sodium bicarbonate, sodium hydroxide and potassium hydroxide;
    所述第二稳定剂为棉隆、氰氨化钙、嘧菌酯、氯溴异氰尿酸、六氧化二氯、三氯异氰尿酸中的至少一种。The second stabilizer is at least one of dacenolon, calcium cyanamide, azoxystrobin, chlorobromoisocyanuric acid, dichlorine hexoxide, and trichloroisocyanuric acid.
  7. 根据权利要求1-6任一项所述的支护材料，其特征在于，所述水解液为生物水解液或化学水解液。The support material according to any one of claims 1-6, characterized in that, the hydrolyzate is biological hydrolyzate or chemical hydrolyzate.
  8. 根据权利要求7所述的支护材料，其特征在于，所述生物水解液为甘露聚糖酶、半乳甘露聚糖酶、甘露低聚糖酶、甘露糖酶、鼠李糖苷酶和半乳糖酶中的至少一种；The support material according to claim 7, wherein the biological hydrolyzate is mannanase, galactomannanase, mannooligosaccharidease, mannosidase, rhamnosidase and galactose at least one of enzymes;
    所述化学水解液为酸性液体。The chemical hydrolyzate is an acidic liquid.
  9. 一种渗透式反应墙的建造方法，其特征在于，以权利要求1-8任一项所述的支护材料作为原料。A construction method of a permeable reactive wall, characterized in that the support material described in any one of claims 1-8 is used as a raw material.
  10. 根据权利要求9所述的建造方法，其特征在于，包括如下步骤，The construction method according to claim 9, characterized in that it comprises the following steps,
    按照常规方法建造渗透式反应墙，在开挖沟渠的同时注入所述第一组分，待装入填料或骨料，渗透式反应墙建造完成后注入第二组分。Construct the permeable reaction wall according to the conventional method, inject the first component while excavating the ditch, wait for filler or aggregate to be loaded, and inject the second component after the permeable reaction wall is constructed.
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