CN217150151U - Saline soil foundation structure - Google Patents

Abstract

The utility model relates to the technical field of engineering construction, in particular to a salinized soil foundation structure which mainly comprises a waterproof layer, plain soil, natural pebbles and non-woven geotextile; the non-woven geotextile is arranged at the bottommost layer of the foundation, and natural pebbles are arranged on the upper layer of the non-woven geotextile; the upper layer of the natural pebble is free plain soil, and an upper waterproof layer is arranged on the upper layer of the plain soil; the cross section of the foundation consisting of the plain soil and the natural pebbles is of a trapezoidal structure, and a cement concrete layer is arranged on the slope surface of the foundation; the beneficial effect of this device does: by adopting the SBS waterproof coiled material, ground water can be effectively prevented from entering the pebble replacement layer; the natural pebble layer can effectively ensure the stability and safety of the foundation of the building and the structure and prevent the saline soil from being swelled and corroded to damage the foundation of the building and the structure.

Description

Saline soil foundation structure

Technical Field

The utility model relates to an engineering construction technical field, concretely relates to salinized soil foundation structure.

Background

The salinized soil is a general term of salinized soil and alkaline earth and various salinized and alkalized soils. The damage of the saline soil section to buildings and structures is mainly caused by salt expansion and corrosion. The harm of the saline soil area to the building structures in the transformer substation is mainly reflected on light structures of shallow foundations such as enclosing walls, roads, cable ducts, equipment support foundations and water dispersion. The salt swelling causes the arching and cracking of the buildings and structures contacting with the surface soil. Meanwhile, the surfaces of the buildings and structures which are in contact with the surface soil have obvious corrosion, stripping and falling phenomena.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the thought of layer upon layer protection is taken in the district, utilizes the cobble layer as natural buffer layer, effectively solves the damage deformation of salinized soil area building, structure foundation. The saline soil foundation treatment method is different from the traditional treatment measures, and the method improves the singleness of the traditional saline soil foundation treatment method. The advantages of the SBS waterproof coiled material, the plain soil, the natural pebbles, the non-woven geotextile and other materials are comprehensively utilized, and the integrity of the building foundation in the saline soil area is guaranteed.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a saline soil foundation structure mainly comprises an upper waterproof layer 1, plain soil 2, natural pebbles 3 and non-woven geotextile 4; the non-woven geotextile 4 is arranged at the bottommost layer of the foundation, and natural pebbles 3 are arranged on the upper layer of the non-woven geotextile 4; plain soil 2 is arranged on the upper layer of the natural pebbles 3, and an upper waterproof layer 1 is arranged on the upper layer of the plain soil 2; the cross section of the saline soil foundation consisting of the plain soil 2 and the natural pebbles 3 is of a trapezoidal structure, and a cement concrete layer is arranged on the slope surface of the saline soil foundation. The plain soil 2 is mainly used as a buffer layer between the waterproof layer 1 and the natural pebbles 3, and the waterproof coiled material is prevented from being damaged by uneven corners of the pebble layer.

Preferably, the upper waterproof layer 1 is one of an SBS waterproof coiled material, an asphalt composite flexible waterproof coiled material, an ethylene propylene diene monomer waterproof coiled material, a chlorinated polyethylene waterproof coiled material and a self-adhesive rubber asphalt waterproof coiled material.

Preferably, the thickness of the SBS waterproof roll is 3-5 mm.

Preferably, the thickness of the plain soil 2 is between 100mm and 250 mm.

Preferably, the plain soil 2 cannot be doped with organic matters, stones with the grain size larger than 5mm or other impurities.

Preferably, the thickness of the natural pebble 3 layer is 1500mm-2500mm, and the particle size of the pebbles is 20-80 mm.

Preferably, the natural pebbles 3 may be one of coarse sand, gravel, round gravel and medium sand.

The SBS waterproof coiled material part is mainly used for blocking rainwater and infiltration of upper soil bodies, the main body part of the SBS waterproof coiled material part is made of asphalt serving as a modifier and is used as a dipping and coating material, and materials such as polyethylene films, fine sand and mineral particles are covered on the surface of the SBS waterproof coiled material part.

The thickness of the SBS waterproof coiled material is 4mm, the thickness of the SBS waterproof coiled material can also be 3mm to serve as a waterproof layer, but the SBS waterproof coiled material with the thickness of 2mm cannot be adopted. The SBS waterproof rolling working hours adopt GB50108-2008 'underground technical waterproof standard', and the relevant requirements of the standard are followed.

The natural pebbles of the utility model have the function of ensuring that the contact between the pebbles does not generate relative displacement and ensuring the stability of the upper structure when the saline soil is desrystallized and expands; the natural pebbles need to be cleaned during construction, and the mud content of the pebbles is not more than 2 percent; the natural pebble has a bearing capacity characteristic value fak of 200-300kPa, and the compaction coefficient of the pebble is not less than 0.97.

The utility model discloses a non-woven geotechnological cloth, its mainly act on the abundant region of groundwater, prevent the mixing of multiple soil property or run off and effectively block dropping of cobble layer.

The paving thickness of the plain soil is between 100mm and 250mm, and when the volumes of the upper structure and the building foundation are larger, the plain soil with the thickness of 250mm is paved to be used as a buffer layer; when the volumes of the upper structure and the building foundation are small, paving plain soil with the thickness of 100mm as a buffer layer; when the volume of the upper structure and the building foundation is moderate, plain soil with the thickness of 200mm is paved to be used as a buffer layer. And the laying thickness should not be more than 250 mm.

The beneficial effect of this device does: the invention relates to a saline soil foundation structure, which optimizes the measures of the traditional foundation treatment method. By adopting the SBS waterproof coiled material, ground water can be effectively prevented from entering the pebble replacement layer; the natural pebble layer can effectively guarantee the stability and safety of the foundation of the building and the structure and prevent the saline soil from being swelled and corroded to damage the foundation of the building and the structure; the natural pebble replacement and filling is an innovative technology in the field of civil engineering construction, and is improved, optimized and innovated on the basis of the replacement and filling of the traditional saline soil foundation.

Drawings

FIG. 1 is a general plane layout diagram of a saline soil foundation structure of the present invention;

wherein: 1. a waterproof layer is arranged; 2. plain soil; 3. natural pebbles; 4. a non-woven geotextile.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A saline soil foundation structure mainly comprises an upper waterproof layer 1, plain soil 2, natural pebbles 3 and non-woven geotextile 4; the non-woven geotextile 4 is arranged at the bottommost layer of the foundation, and natural pebbles 3 are arranged on the upper layer of the non-woven geotextile 4; the natural pebbles 3 are arranged on the upper layer of the free plain soil 2, and an upper waterproof layer 1 is arranged on the upper layer of the plain soil 2. The cross section of the saline soil foundation consisting of the plain soil 2 and the natural pebbles 3 is of a trapezoidal structure, and a cement concrete layer is arranged on the slope surface of the saline soil foundation. The plain soil 2 is mainly used as a buffer layer between the waterproof layer 1 and the natural pebbles 3, and the waterproof coiled material is prevented from being damaged by uneven corners of the pebble layer.

Example 1

A saline soil foundation structure mainly comprises an upper waterproof layer 1, plain soil 2, natural pebbles 3 and non-woven geotextile 4; the non-woven geotextile 4 is arranged at the bottommost layer of the foundation, and natural pebbles 3 are arranged on the upper layer of the non-woven geotextile 4; the natural pebbles 3 are arranged on the upper layer of the free plain soil 2, and an upper waterproof layer 1 is arranged on the upper layer of the plain soil 2. The plain soil 2 is mainly used as a buffer layer between the waterproof layer 1 and the natural pebbles 3, and the waterproof coiled material is prevented from being damaged by uneven corners of the pebble layer.

The utility model discloses mainly constitute by four bibliographic categories such as SBS waterproofing membrane, plain soil 2, natural cobble 3, non-woven geotechnological cloth 4. The main content is that the SBS waterproof coiled material can effectively block rainwater and infiltration of upper soil body; the plain soil 2 ensures that the waterproof coiled material is not damaged by the uneven corners of the pebble layer; the pebble layer is used as a macroporous material, when salt dehydration crystallization of the saline soil is carried out, expanded crystals can freely expand in pores of the pebble layer, and the contact among pebbles does not generate relative displacement, so that the stability and the safety of the foundation of the building are ensured; in the region with shallow groundwater level, the non-woven geotextile 4 is adopted to prevent the mixing or loss of various soil qualities and effectively prevent the falling of the pebble layer, thereby improving the stability of the foundation. Preferably, the thickness of the SBS waterproof roll is 3-5 mm. The thickness of the plain soil 2 is between 100mm and 250 mm. The plain soil 2 cannot be doped with organic matters, stones with the grain size larger than 5mm or other impurities. The thickness of the natural pebble 3 layer is 1500mm-2500mm, and the particle size of the pebbles is 20-80 mm. The natural pebbles 3 may be one of coarse sand, gravel, round gravel and medium sand.

The pebble layers do not transfer displacement, and because the pebble layers are in point contact with each other, when the side soil is extruded and deformed, the sand pebbles are staggered with each other; therefore, the displacement is not transmitted, and the buffer layer is suitable for the periphery of the foundation pit.

The salt in the soil is spread by taking water as a carrier, when ground rainwater permeates, the pebble layer plays a role in rapid drainage, and when the ground rainwater rises, the pebbles have a function of blocking capillary water from rising. The salts are difficult to spread in the pebble bed.

Example 2

The width of the natural pebble 3 layer is taken as a value, when the width of the natural pebble 3 layer is determined, the requirement of stress diffusion is met, the strength condition of the soil on the side surface is also considered, the natural pebble 3 layer is ensured to have enough width, and the natural pebble 3 layer is prevented from being extruded to the side edge to increase the vertical deformation of the pebble layer. When the foundation load is larger, or the requirement on sedimentation is higher, or the bearing capacity of soil at the side of the natural pebble 3 layer is poorer, the width of the natural pebble 3 layer is increased.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims (6)

1. A saline soil foundation structure which is characterized in that: mainly comprises an upper waterproof layer (1), plain soil (2), natural pebbles (3) and non-woven geotextile (4); the non-woven geotextile (4) is arranged at the bottommost layer of the foundation, and natural pebbles (3) are arranged on the upper layer of the non-woven geotextile (4); plain soil (2) is arranged on the upper layer of the natural pebbles (3), and an upper waterproof layer (1) is arranged on the upper layer of the plain soil (2); the cross section of the salinized soil foundation formed by the plain soil (2) and the natural pebbles (3) is of a trapezoidal structure, and a cement concrete layer is arranged on the slope surface of the salinized soil foundation.

2. The saline soil foundation structure of claim 1, wherein: the upper waterproof layer (1) is one of SBS waterproof coiled material, asphalt composite flexible waterproof coiled material, ethylene propylene diene monomer waterproof coiled material, chlorinated polyethylene waterproof coiled material and self-adhesive rubber asphalt waterproof coiled material.

3. A saline soil foundation construction as claimed in claim 2, wherein: the thickness of the SBS waterproof coiled material is 3-5 mm.

4. The saline soil foundation structure of claim 1, wherein: the thickness of the plain soil (2) is between 100mm and 250 mm.

5. The saline soil foundation structure of claim 1, wherein: the plain soil (2) cannot be doped with organic matters, stones with the grain size larger than 5mm or other impurities.

6. The saline soil foundation structure of claim 1, wherein: the thickness of the natural pebble (3) layer is 1500mm-2500mm, and the particle size of the pebbles is 20-80 mm.

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