CN209854694U

CN209854694U - Soil remediation seepage prevention structure

Info

Publication number: CN209854694U
Application number: CN201822277158.XU
Authority: CN
Inventors: 顾峥; 王燕群; 李国伟
Original assignee: Shanghai Tongji Construction Polytron Technologies Inc
Current assignee: Shanghai Tongji Construction Polytron Technologies Inc
Priority date: 2018-12-30
Filing date: 2018-12-30
Publication date: 2019-12-27
Anticipated expiration: 2028-12-30

Abstract

The utility model provides a soil remediation seepage prevention structure lays by four layers of functional layers from bottom to top in proper order and constitutes, four layers of functional layers set up the direction all parallel with ground, four layers of functional layers are concrete layer, compound geotechnological rete, wood fiber layer and steel deck from bottom to top in proper order. The utility model provides a seepage prevention structure is restoreed to soil can prevent effectively that the soil dystopy from restoreing the in-process and polluting the harmful component contact in the soil or get into the soil of restoreing the field district to cause secondary pollution. The utility model discloses intensity, rigidity and stability are good, and construction material conveniently demolishs and handles, has saved engineering basis investment cost, and the wood fiber layer has played the guard action to compound geomembrane in the work progress, and the wood fiber layer has certain absorption to soil infiltration simultaneously, can alleviate the prevention of seepage accident because weather reasons such as rain produce, and the noise that the soft texture also helps alleviateing mechanical operation friction plate production.

Description

Soil remediation seepage prevention structure

Technical Field

The utility model relates to a soil remediation seepage prevention structure belongs to soil dystopy and restores and environmental protection engineering technical field.

Background

The soil environment condition is deteriorated due to the over-development and construction activities of human beings on the earth, and pollution of various heavy metals, organic compounds and the like is visible everywhere. In recent years, as the huge harm brought by soil pollution to human is frequently generated, the problem of soil pollution has become an environmental problem concerning the survival and health of all human beings, and the wide attention of all countries is also attracted. Therefore, the vigorous implementation of soil remediation is an important means for protecting the ecological environment of soil and solving the problem of land resource pollution.

Soil remediation is a technical measure to restore normal function to contaminated soil. Many countries in the world, especially developed countries, develop and develop contaminated soil remediation and remediation plans, and therefore an emerging soil remediation industry is formed. The main restoration technology comprises soil landfill, soil solidification, a soil chemical leaching method, soil chemical solidification and stabilization, soil thermal desorption, a biological restoration method and the like.

In the construction process of the soil remediation engineering, the migration and diffusion of pollutants are likely to occur, so that secondary pollution is caused. Therefore, the secondary pollution prevention and treatment measures are an important link in the construction process of the soil remediation engineering.

In order to prevent the pollutants in the soil from migrating and diffusing in a solution state, necessary seepage-proofing measures are generally adopted in soil remediation engineering. In the existing design and construction scheme of the soil remediation engineering, the seepage-proofing structure and the construction method for the unpolluted soil in the construction site are single. The pure concrete anti-seepage terrace with a single structure requires that the structure has certain thickness and adopts cement with higher waterproof performance level. The structure that single geomembrane was laid difficultly, its intensity is difficult to satisfy construction machinery top construction, damages easily, takes place the seepage. The seepage-proofing structure with single steel plate layout has poor seepage-proofing effect due to the gaps among the steel plates.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a can prevent effectively that the soil dystopy from repairing the soil in-process pollutes the soil harmful component contact or get into the soil of restoreing the field district to cause secondary pollution's structure.

In order to solve the technical problem, the technical scheme of the utility model provide a soil remediation seepage prevention structure, its characterized in that: lay by four layers of functional layers from bottom to top in proper order and constitute, four layers of functional layers set up the direction all parallel with ground, four layers of functional layers are concrete layer, compound geomembrane layer, wood fiber layer and steel sheet layer from bottom to top in proper order.

Preferably, the thickness of the concrete layer is 8-12 cm.

Preferably, the concrete strength grade of the concrete layer is C15 or above C15.

Preferably, the composite geomembrane layer is formed by compounding an anti-seepage base material and non-woven fabrics.

More preferably, the impermeable base material is a base material made of polyethylene, high density polyethylene, ultra-high molecular weight polyethylene or polyvinyl chloride.

Preferably, the seam of the composite geomembrane layer is a heat welding connection structure.

Preferably, the wood fiber layer is formed by laying one or more of thatch mats, palm wood mats and dry straws.

Preferably, the thickness of the wood fiber layer is 8-10 cm.

Preferably, the steel plate layer is a hot-rolled medium-thickness steel plate with the thickness of 15-20 mm.

Compared with the prior art, the utility model provides a seepage prevention structure is restoreed to soil has following beneficial effect:

1. the composite material has certain strength, rigidity and stability, and meets the requirements of on-site mechanical construction;

2. the composite geomembrane interlayer is adopted for seepage prevention, so that a good seepage prevention effect can be achieved, the harmful ingredients in the polluted soil are effectively prevented from contacting or entering the soil in a remediation field area in the process of soil ex-situ remediation, and secondary pollution is avoided;

3. the construction material is convenient to remove and treat, the site reduction and finishing after the construction are facilitated, the steel plate can be recycled after being cleaned, and the wood fiber layer can be incinerated after being dried;

4. the investment cost of the engineering foundation is saved: the steel plate is used as a support, so that the cement laying thickness is reduced, and the cement consumption and the later concrete outward transportation cost are reduced; the geomembrane is used as an impermeable layer, so that the geomembrane is more economic than impermeable cement;

5. the wood fiber layer is used as an interlayer between the composite geomembrane and the steel plate, so that the composite geomembrane is protected in the construction process, and the problem that the composite geomembrane is damaged by the steel plate due to mechanical operation above the steel plate is solved;

6. the wood fiber layer is soft and absorbs water, has a certain absorption effect on soil seepage, can relieve seepage-proofing accidents caused by rain and other weather reasons, and meanwhile, the soft texture also helps to reduce noise generated by mechanical operation friction steel plates.

Drawings

Fig. 1 is a schematic view of the soil remediation impervious structure provided in this embodiment.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Fig. 1 is a schematic view of the soil remediation impervious structure provided in this embodiment, the soil remediation impervious structure is laid in a plane, and is composed of four functional layers, and the four functional layers are made of different materials and have different functions. The functional layer is arranged in a direction parallel to the ground, and comprises a concrete layer 4, a composite geomembrane layer 3, a wood fiber layer 2 and a steel plate layer 1 from bottom to top in sequence.

During construction, four different materials, namely a concrete cement terrace, a composite geotextile film, a wood fiber layer and a steel plate, are paved according to a certain paving sequence, and the concrete layer 4, the composite geotextile layer 3, the wood fiber layer 2 and the steel plate layer 1 are sequentially arranged from the ground to the uppermost layer. The construction steps are as follows: leveling field → pouring concrete layer → laying composite geomembrane → laying wood fiber layer → laying steel plate.

The concrete construction method for the soil remediation impervious structure provided by the embodiment comprises the following steps:

step 1, leveling a field: the ground needing to be paved with the anti-seepage measures in the soil restoration construction site is dug, filled and leveled manually or mechanically and tamped to form a basically flat plane, so that the paving of the anti-seepage protective layer is facilitated.

Step 2, pouring a concrete layer 4: firstly, a concrete layer of 8-12 cm is poured on a flat ground surface, and the surface of the concrete layer after being cured is smooth and tidy and has no fine slag and debris. The concrete strength of the concrete layer is C15, and higher strength cement can also be used.

Step 3, laying the composite geomembrane layer 3: and after the cement layer is hardened, laying a composite geomembrane on the cement layer, wherein the composite geomembrane is connected by adopting a hot welding mode in a joint treatment mode.

Step 4, paving the wood fiber layer 2: after the composite geomembrane is laid, a wood fiber layer is laid on the composite geomembrane.

Step 5, paving a steel plate layer 1: the steel plate layers are laid on the wood fiber layers, the steel plates are laid as tightly as possible, gaps among the steel plates are reduced to ensure the integrity and stability of the steel plates, the steel plates are laid tightly, and the gaps among the steel plates cannot exceed 3 cm. The steel plate layer is a hot-rolled medium-thickness steel plate with the thickness of 15-20 mm.

Experiments show that the soil remediation seepage-proofing structure provided by the embodiment can effectively prevent pollutants in the polluted soil from entering the soil of the remediation field area in the form of solution in the soil remediation construction process, and further avoid causing secondary pollution. The structure has certain strength, rigidity and stability, and meets the requirements of on-site mechanical construction; the structure is convenient to dismantle, the site reduction and arrangement after the construction are facilitated, the steel plate can be recycled after being cleaned, and the wood fiber layer can be incinerated after being air-dried; the investment cost of engineering foundation is saved, the steel plate is used as a support, the cement laying thickness is reduced, and the cement consumption and the later concrete outward transportation cost are reduced; the geomembrane is used as an impermeable layer, so that the geomembrane is more economic than impermeable cement; the wood fiber layer is used as an interlayer between the composite geomembrane and the steel plate, so that the composite geomembrane is protected in the construction process, and the problem that the composite geomembrane is damaged by the steel plate due to mechanical operation above the steel plate is solved; the wood fiber layer is soft and absorbs water, has a certain absorption effect on soil seepage, can relieve seepage-proofing accidents caused by rain and other weather reasons, and meanwhile, the soft texture also helps to reduce noise generated by mechanical operation friction steel plates.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a soil remediation seepage prevention structure which characterized in that: lay by four layers of functional layers from bottom to top in proper order and constitute, four layers of functional layers set up the direction and all are parallel with ground, four layers of functional layers are concrete layer (4), compound geotechnological rete (3), wood fibre layer (2) and steel deck (1) from bottom to top in proper order.

2. The soil remediation seepage prevention structure of claim 1, wherein: the thickness of the concrete layer (4) is 8-12 cm.

3. The soil remediation seepage prevention structure of claim 1, wherein: the concrete strength grade of the concrete layer (4) is above C15 grade.

4. The soil remediation seepage prevention structure of claim 1, wherein: the composite geomembrane layer (3) is formed by compounding an anti-seepage base material and non-woven fabrics.

5. The soil remediation seepage prevention structure of claim 4, wherein: the anti-seepage base material is made of polyethylene.

6. The soil remediation seepage prevention structure of claim 4, wherein: and the seam of the composite geomembrane layer (3) is a hot welding connecting structure.

7. The soil remediation seepage prevention structure of claim 1, wherein: the wood fiber layer (2) is formed by paving one or more of thatch mats, palm wood mats and dry straws.

8. The soil remediation seepage prevention structure of claim 1, wherein: the thickness of the wood fiber layer (2) is 8-10 cm.

9. The soil remediation seepage prevention structure of claim 1, wherein: the steel plate layer (1) is a hot-rolled medium-thickness steel plate with the thickness of 15-20 mm.

10. The soil remediation seepage prevention structure of claim 4, wherein: the anti-seepage base material is made of high-density polyethylene, ultrahigh molecular weight polyethylene or polyvinyl chloride.