CN101319580A - A construction method for constructing water storage facilities using soil solidification materials - Google Patents

Abstract

The invention discloses a construction method for building a water storage facility using soil solidification materials, wherein a soil solidifier, loess and water are used to make a dry mixture, and then the mixture is compacted under the condition of formwork support to form a water cellar. The water cellar prepared by the method has high strength and anti-seepage performance, can meet the anti-seepage and durability requirements of the water cellar, and has good water quality; the dry construction process is relatively convenient and has low construction cost. The invention has important practical value for promoting the development of rainwater collection and utilization technology in areas with water shortage, especially in arid and semi-arid areas.

Description

A construction method for constructing water storage facilities using soil solidification materials

technical field

The invention belongs to the technical field of water saving, water storage and water conservation in agricultural life, production and ecological environment construction in arid areas, and mainly relates to materials and techniques for building water storage facilities, especially a method for building water storage facilities using soil solidification materials. The method is suitable for anti-seepage treatment of water storage facilities in rural areas, such as water cellars, water kilns, pools, fish ponds, and ponds and dams.

Background technique

China is a dry and water-scarce country, with a per capita water resource of 2200m ³ , which is only 1/4 of the world's per capita share. There are still 250 million people who have difficulty drinking water, accounting for about 20% of the total population of the country, and some of them are located in low-quality In brackish water areas, the rainwater collected by water cellars is an important water source; China's dry land area is about 1.1 billion mu, accounting for about 60% of China's cultivated land area, without irrigation facilities and water sources, and can only rely on natural precipitation resources to maintain crop growth. The fundamental measure to achieve high and stable yield of dryland crops is how to effectively improve the utilization rate and utilization efficiency of natural precipitation resources. Practice has proved that rain harvesting supplementary irrigation agriculture is an effective way to achieve the above goals. Not only that, due to the influence of the monsoon climate in my country, the rainfall is too concentrated and unevenly distributed in time and space, which makes the rainfall and crop water demand time out of sync, resulting in severe perennial drought and seasonal drought. Theory and practice have proved that rainwater storage and utilization technology is an effective way to solve the problem of water shortage areas, especially in arid and semi-arid areas. Water storage facilities such as water cellars are an important part of this technical system and one of its key technologies. At present, red clay, cement mortar, concrete or plastic sheets are mostly used as materials for building water cellars. Red cement has good anti-seepage performance and good water quality, but the material is difficult to obtain, and the construction process is extremely cumbersome, so it is basically not used at present; cement mortar and concrete materials have good durability and anti-seepage performance, and are currently mostly used, but Due to the lack of raw materials such as sand and gravel, the cost is relatively expensive, and the water quality is constantly questioned; the anti-seepage effect of the membrane material is good, but the durability is poor. The shortcomings of these materials have greatly limited the development and utilization of rainwater storage and utilization technologies. Therefore, seeking an economical, efficient, environmentally friendly, and easy-to-construct new water storage facility material and its construction technology has always been an urgent problem to be solved.

Contents of the invention

The purpose of the present invention is to provide a construction method for building water storage facilities using soil solidification materials. The method adopts soil solidification materials, utilizes solidified soil dry construction technology, and replaces materials such as cement with solidified soil for anti-seepage, so as to achieve anti-seepage water storage the goal of.

In order to achieve the above tasks, the present invention takes the following technical solutions:

A construction method for constructing water storage facilities using soil-solidifying materials, characterized in that the method uses a soil-solidifying agent, loess, and water to make a dry mixture, and then tamps the mixture under the condition of formwork support to form a water cellar (Water storage facility), is characterized in that, at least comprises the following steps:

1) Excavate and form the water cellar as required, and treat the inner surface of the water cellar to a rough surface;

2) Compact the foundation of the cellar bottom, the dry density after compaction is not less than 1.8g/cm ³ , the thickness of the cellar bottom is 20cm-25cm, and the foundation of the cellar bottom is leveled;

3) Prepare the soil material according to 1.2 times the weight of the material used in the water cellar. After the soil material is crushed, pass through a 10mm soil sieve, and check the moisture content of the soil material to keep the moisture content of the soil material (1.15w _op +2)%, where w _op represents the optimal water content;

4) adding a soil curing agent to the soil material, the weight ratio of the soil curing agent to the soil material is 1:10, and then stirring evenly to obtain a solidified soil mixture;

5) Spread the solidified soil mixture on the bottom of the cellar according to the loose paving coefficient of 1.2 to 1.3, and then tamp the solidified soil mixture after paving, the compacted density is not less than 1.8g/cm ³ , and the thickness of the solidified cellar bottom is not less than 30cm;

6) After the bottom of the cellar is made, formwork and scaffolding are used to support the impermeable layer of the cellar wall according to the shape of the cellar, so that the thickness of the cellar wall is not less than 10cm;

7) Fill the solidified soil mixture into the formwork layer by layer, and make the cellar wall layer by layer. The thickness of each layer of anti-seepage layer is not more than 20cm, and it is tamped. The tamping density is not less than 1.7g/cm ³ . The surface between the layers is brushed;

8) 12 to 18 hours after the completion of the water cellar, first sprinkle water on the bottom and wall of the cellar for 2 days to keep the surface of the bottom and wall moist. After the solidified soil forms a certain strength, inject 0.02 to 0.04 Double the volume of water, close the mouth of the water cellar, and continue to maintain for 10 days.

The water cellar built by the method of the present invention combines the advantages of the clay water cellar and the concrete water cellar, the permeability coefficient is less than 10 ^-8 cm/s, and the service life can reach 15-20 years, which is basically the same as that of the concrete water cellar, and it is environmentally friendly. No pollution, its construction cost is only one-third of the construction cost of concrete water cellars, and the water quality is better than that of concrete water cellars; it has high strength and anti-seepage performance, which can meet the needs of water cellars for anti-seepage and durability; The construction is relatively simple and the construction cost is reduced. It is especially suitable for the vast Loess Plateau and other areas without sand and gravel, and has important practical significance for promoting the development of rain harvesting and supplementary irrigation agriculture in arid areas.

Description of drawings

Fig. 1 is a schematic diagram of building a water cellar with soil solidification materials; wherein, (a) is a front view, and figure (b) is a partial enlarged view of A place of (a) figure;

Figure 2 is a schematic diagram of the construction process;

Fig. 3 is the concrete construction schematic diagram of embodiment.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments given by the inventor.

Detailed ways

The present invention is a construction method for constructing water storage facilities using the patented technology of soil solidification materials owned by the inventor. The raw materials for construction include soil solidification materials, soil, water, etc., and the main equipment is a mixer, template, scaffolding, shovel, trowel, Tile knife, stone rammer, etc.

Below are the embodiments given by the inventor:

Referring to accompanying drawing, according to the water cellar that Fig. 1 provides, excavate water cellar 1 below ground, make water inlet pipe 1 and be connected with sedimentation tank. Fig. 1(b) is an enlarged partial construction drawing at side wall A of Fig. 1(a).

The soil curing agent used in this embodiment is the MBER soil curing agent invented by the applicant (Chinese patent, patent number: zL 200410073273.5), and the soil material adopts Yangling loess.

Design the water cellar 2 according to the relevant specifications according to the requirements; proceed according to the construction schematic diagram in Figure 3:

1) Construction stakeout: carry out construction stakeout according to net size and excavation size, centerline and sideline should be laid out, marks should be set on piles, elevation measurement should be carried out, and the design height of water cellar 2 should be marked;

2) Excavate and ram the bottom of the cellar: Excavate the cellar and treat the inner surface of the cellar to a rough surface. The foundation of the cellar bottom shall be compacted, the dry density after compaction shall not be less than 1.8g/cm ³ , the thickness of the cellar bottom shall be 20cm-25cm, and the foundation of the cellar bottom shall be leveled;

3) Mixture preparation:

Crush soil clods: crush the soil clods according to 1.2 times the weight of the designed material, and pass through a 10mm soil sieve;

Sprinkle water: check the moisture content in the soil, it should be around (1.15w _op +2)%, where w _op represents the optimal moisture content, if the requirements cannot be met, the soil should be watered or dried.

Mixing and mixing: calculate the amount of soil curing agent material, according to the amount of curing agent and soil weight 1:10, add soil curing agent to the soil and stir to make it uniform and make the water content meet the design requirements;

4) Spread the solidified soil mixture according to the loose paving coefficient of 1.2 to 1.3 to form the pit bottom foundation 5, and tamp the pit bottom foundation 5 to the design thickness (not less than 30cm), and the dry density of the solidified pit bottom foundation 5 is not less than 30 cm. It should be less than 1.8g/cm ³ and make it relatively flat.

5) Cellar wall support: formwork and scaffolding are used to support the cellar wall with a thickness of not less than 10cm.

6) Ramping the cellar wall: fill the solidified soil mixture into the water cellar formwork, and tamp it according to the thickness of each layer not greater than 20cm, and roughening is required between layers;

7) Maintenance: timely maintenance 12-18 hours after the completion of masonry, and always keep the surface moist. After 2 days of watering maintenance, inject (0.02-0.04) times the designed water storage volume into the water storage facility, seal the water storage facility opening, and continue curing for 10 days.

8) During the maintenance period, cover the top of the water cellar with a concrete cover plate, and use cement mortar to bond the joints between the concrete cover plates to prevent the upper layer of impurities from falling into the water cellar.

9) Cover about 35cm of soil layer on the concrete cover plate, which is required to be dense.

10) The handrails and water pipes of the water cellar are best installed in place during the construction project.

The applicant tested the mechanical index and anti-seepage coefficient of the water cellar made in the above embodiment, and the results showed that the 7d unconfined compressive strength of the solidified soil was between 1.72Mpa and 278Mpa, and the permeability coefficient was between n×10 Between ^-7 and n×10 ^-8 cm/s, it belongs to the relatively impermeable layer. It shows that after the soil is treated with the curing agent, it has good anti-seepage effect and strength, which can meet the requirements of building water storage facilities such as water cellars.

Of course, commercially available conventional high-performance soil stabilization materials can also be used. According to the steps of the above-mentioned embodiments, the requirements for building water storage facilities such as water cellars can also be met.

Claims (2)

1. A construction method utilizing soil solidification material to build a water storage cellar, is characterized in that, at least comprises the following steps: 1) Excavate and form the water cellar as required, and treat the inner surface of the water cellar to a rough surface; 2) Compact the foundation of the cellar bottom, the dry density after compaction is not less than 1.8g/cm ³ , the thickness of the cellar bottom is 20cm-25cm, and the foundation of the cellar bottom is leveled; 3) Prepare the soil material according to 1.2 times the weight of the material used in the water cellar, pass the 10mm soil sieve after the soil material is crushed, and check the moisture content of the soil material to keep the moisture content of the soil material (1.15w _op +2)%. w _op represents the optimal water content; 4) adding a soil curing agent to the soil material, the weight ratio of the soil curing agent to the soil material is 1:10, and then stirring evenly to obtain a solidified soil mixture; 5) Spread the solidified soil mixture on the bottom of the pit according to the loose paving coefficient of 1.2 to 1.3, and tamp the solidified soil mixture after paving, so that the thickness of the bottom of the pit is not less than 30cm; 6) After the bottom of the cellar is made, formwork and scaffolding are used to support the impermeable layer of the cellar wall according to the shape of the cellar, so that the thickness of the cellar wall is not less than 10cm; 7) Fill the solidified soil mixture into the formwork layer by layer, and make the cellar wall layer by layer. The thickness of each layer of anti-seepage layer is not more than 20cm, and it is tamped. The tamping density is not less than 1.7g/cm ³ . The surface between the layers is brushed; 8) 12 to 18 hours after the completion of the water cellar, first sprinkle water on the bottom and wall of the cellar for 2 days to keep the surface of the bottom and wall of the cellar moist. After the solidified soil has formed a certain strength, inject 0.02~ 0.04 times the volume of water, close the mouth of the water cellar, and continue to maintain for 10 days. 2. The method according to claim 1, characterized in that, said soil solidifying agent is MBER soil stabilizing agent or conventional high-performance soil stabilizing material.

Images