CN105544464A - Method for embankment construction using removed river deposit from medium and small rivers in mountainous area - Google Patents

Abstract

The invention discloses a construction method for embankment construction of beach clearing materials for small and medium-sized rivers in mountainous areas, which comprises the following steps: removing sundries from beach pebbles and sand of small and medium-sized rivers in mountainous areas; Clay anti-seepage sloping walls are filled on the surface of the embankment near the river; anti-seepage layers are arranged on the surface of clay anti-seepage slant walls; slope protection is arranged on the anti-seepage layers; foot guards are arranged at the foot of the embankment. The invention uses beach-clearing materials to build embankments, which breaks the shackles of the traditional idea that homogeneous soil must be used for embankments, and adopts simple and economical technical measures to ensure the stability of embankments and seepage. The transportation of homogeneous soil for embankment saves engineering investment and protects the ecology. The invention is suitable for embankment construction in mountainous areas.

Description

A construction method for embankment construction with beach clearing materials for small and medium rivers in mountainous areas

technical field

The invention relates to an embankment construction method, in particular to an embankment construction method with beach clearing materials for small and medium-sized rivers in mountainous areas.

Background technique

There are many rivers in mountainous areas, the rivers are short and have a large gradient, so that the floods come and go quickly, and most of them are rivers with no embankments or low embankment standards, and the flood control capacity of the rivers is low. Major disasters such as destroying villages and roads, submerging farmland, etc., and most of the small and medium-sized rivers have fertile land, dense population, and great losses in flood disasters.

Small and medium-sized rivers in mountainous areas have small basin area, short flow, short confluence time, large river slope, and steep flood seasons with steep rises and falls, while the flow rate in dry seasons is small, and some of them are basically cut off. Not long, the damage to the embankment is relatively small, the flow bank is wide, the slope of the embankment is gentle, and the height is small. There are mostly farmland behind the embankment, abundant precipitation, pleasant climate, and conducive to plant growth. In the process of governance, we should combine the actual situation and adapt measures to local conditions, put safety and ecology in the first place, preserve the natural state of the river as much as possible, and adopt the model of ecological governance. According to the traditional treatment methods and requirements of large rivers, river embankments must be filled with homogeneous soil, and river beach cleaning materials cannot be used for embankment construction. , The construction of a storage yard for storage takes up a lot of land, and the storage yard often becomes a problem; on the other hand, transporting in homogeneous soil from outside to build embankments will cause certain damage to the mountains and forests. In this way, it not only increases investment, wastes land, destroys forests, wastes resources, and destroys ecology, but also easily increases the contradiction between the project and the local area, which is not conducive to the smooth progress of project construction. If beach clearing materials can be used to build embankments, these problems will be solved.

Contents of the invention

The purpose of the present invention is to provide a kind of embankment construction method of clearing beach materials for small and medium rivers in mountainous areas, which breaks the shackles of the traditional thought that building embankments must use homogeneous soil by adopting beach clearing materials to build embankments, and takes simple and economical technical measures, Ensuring embankment stability and seepage stability can not only reduce the outbound transportation of beach cleaning materials, but also avoid the transportation of homogeneous soil for embankment, saving project investment and protecting the ecology.

The solution of the present invention to solve its technical problem is: a kind of construction method of clearing beach materials for small and medium-sized rivers in mountainous areas, which comprises the following steps,

1) Remove debris from the beach pebbles, gravels and sand of small and medium-sized rivers in mountainous areas, mix them evenly, transport them to the embankment, and compact them layer by layer, with a layer thickness of 30cm to 50cm;

2) Clay anti-seepage inclined walls are filled on the slope along the surface of the side of the embankment, the thickness of the clay anti-seepage inclined walls is 30cm-100cm, and the layers are compacted and compacted, and the layer height is 30cm-50cm;

3) Arrange the reverse filter layer on the surface of the clay anti-seepage inclined wall through graded sandstone and geotextile;

4) Arrange slope protection on the reverse filter layer through block stones, gabion pads and turf, with a thickness of 20cm to 50cm;

5) Arrange toe guards at the foot of the embankment through concrete, masonry, dry stone, gabion cages and blocks.

As a further improvement of the above technical solution, after step 5), the apron is arranged on the riverbed near the foot protection by clearing beach pebbles, gravel, riprap and gabion cages.

As a further improvement of the above technical solution, concrete, asphalt and mud stones are used to arrange the embankment crest pavement on the top of the embankment, the thickness of the embankment crest pavement is 10cm-50cm, and the width of the embankment crest pavement is narrower than that of the embankment crest.

As a further improvement of the above technical solution, the layer gaps in the dike body and the layer gaps in the clay anti-seepage inclined wall are staggered.

As a further improvement of the above technical solution, in step 3), the graded sand and gravel are put into carpentry cloth and arranged on the surface of the clay anti-seepage inclined wall to form a reverse filter layer, and the thickness of the graded sand and gravel is 10cm-15cm.

As a further improvement of the above technical solution, in step 5), when the foot protection is located in the nearshore section of the deep stream, it should extend to the deep water line and meet the requirements for the maximum scour depth of the river bed; When the bank is smooth and the slope is relatively gentle, it should be protected to the gentle slope riverbed with a slope of 1:3 to 1:4, the width of the foot protection is 0.3m to 0.6m, and the top elevation is to the design dry water level.

The beneficial effect of the present invention is that: the present invention adopts beach-clearing materials to build embankments, breaks the shackles of the traditional idea that homogeneous soil must be used for embankment, adopts simple and economical technical measures, ensures embankment stability and seepage stability, and can reduce the need for beach clearing. Transportation of materials can also avoid the transportation of homogeneous soil for embankment, save engineering investment and protect the ecology.

detailed description

The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection/connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

A construction method for building embankments with clearing materials for small and medium rivers in mountainous areas, comprising the following steps,

1) Remove debris from the beach pebbles, gravels and sand of small and medium-sized rivers in mountainous areas, mix them evenly, transport them to the embankment, and compact them layer by layer, with a layer thickness of 30cm to 50cm;

2) Clay anti-seepage inclined walls are filled on the slope along the surface of the side of the embankment, the thickness of the clay anti-seepage inclined walls is 30cm-100cm, and the layers are compacted and compacted, and the layer height is 30cm-50cm;

3) Arrange the reverse filter layer on the surface of the clay anti-seepage inclined wall through graded sandstone and geotextile;

4) Arrange slope protection on the reverse filter layer through block stones, gabion pads and turf, with a thickness of 20cm to 50cm;

5) Arrange toe guards at the foot of the embankment through concrete, masonry, dry stone, gabion cages and blocks.

As a further preferred embodiment, after step 5), the apron is arranged on the river bed near the foot protection by clearing beach pebbles, riprap, and gabion cages.

As a further preferred embodiment, concrete, asphalt and mud stones are used to arrange the embankment crest pavement on the top of the embankment, the thickness of the embankment crest pavement is 10cm-50cm, and the width of the embankment crest pavement is narrower than that of the embankment crest.

As a further preferred embodiment, the layered gaps in the dike body and the layered gaps in the clay anti-seepage inclined wall are staggered.

As a further preferred embodiment, in step 3), the graded sand and gravel are packed into carpentry cloth and arranged on the surface of the clay anti-seepage inclined wall to form a reverse filter layer, and the thickness of the graded sand and gravel is 10cm-15cm.

As a further preferred embodiment, in step 5), when the foot protection is located in the nearshore section of the deep stream, it should extend to the deep water line and meet the requirements for the maximum scouring depth of the river bed; 1. When the bank slope is relatively gentle, it should be protected to the gentle slope riverbed with a slope of 1:3 to 1:4, the width of the foot protection is 0.3m to 0.6m, and the top elevation is to the design dry water level.

Beach clearing material for small and medium rivers in mountainous areas is an ecological embankment material with the following characteristics:

1) Local materials, economical and reasonable, are porous, permeable, and environmentally friendly natural building materials;

2) On the premise of ensuring safety, a near-natural river bank structure with good ecology and beautiful landscape can be built to protect and create a good living environment for river bank organisms;

3) The ability to adapt to the deformation of the riverbed should be strong;

4) It is convenient for construction, repair and reinforcement.

The following is a preferred embodiment of the present invention.

Remove debris from the beach pebbles, gravel and sand of small and medium-sized rivers in mountainous areas, mix them evenly, turn them over to the embankment with a hook machine, and compact them layer by layer, with a thickness of 30cm to 50cm. ;

Clay anti-seepage inclined wall is filled along the slope on the surface of the embankment facing the river. The material of the clay anti-seepage inclined wall is cohesive soil material. The thickness of the clay anti-seepage inclined wall is 30cm-100cm. , permeability coefficient and compactness should meet the design requirements.

Arrange the anti-filtration layer on the surface of the clay anti-seepage inclined wall. The material is graded sand and gravel, geotextile, etc., and the thickness of the graded sand and gravel is 10cm to 15cm.

Arrange slope protection on the filter layer, slope protection thickness 20cm ~ 50cm, materials can be block stones, gabion pads, turf and so on.

Arrange toe guards at the foot of the embankment. When the toe guards are located at the near-shore section of Shenhong, they should extend to the deep Hong line and meet the requirements for the maximum scouring depth of the river bed; To the gentle slope riverbed with a slope of 1:3 to 1:4, the width of the toe guards is 0.3m to 0.6m, and the top elevation reaches the design dry water level. Foot protection materials include concrete, mortar masonry, dry masonry, gabion cages, blocks, etc.

Arrange aprons on the riverbed near the toe guards, and the materials are beach pebbles, riprap, gabion cages, etc.; the thickness and width of the aprons should meet the needs of terrain and water flow stability.

On the top of the embankment, the embankment crest pavement is arranged. The thickness of the embankment crest pavement is 10cm to 50cm.

The above is a specific description of the preferred embodiments of the present invention, but the invention is not limited to the described embodiments, those skilled in the art can also make various equivalent modifications or replacements without violating the spirit of the present invention , these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (6)

1. a mountain area middle and small river clear beach material fill construction method, is characterized in that: it comprises the following steps,

1) by after the river shoal boulder and cobble of mountain area middle and small river, sandy soil removing foreign material, mix, be transported to levee body, layered rolling is closely knit, lift height 30cm ~ 50cm;

2) border on the river side surface along slope being filled clay core sloping core at levee body, the thickness 30cm ~ 100cm of clay core sloping core, layered rolling is closely knit, layer height 30cm ~ 50cm;

3) loaded filter is arranged on clay core sloping core surface by graded sand and stone and geotextiles;

4) on loaded filter, bank protection is arranged by block stone, lattice guest protection pad and turf, thickness 20cm ~ 50cm;

5) spats is arranged at levee toe by concrete, stone masonry, dry stone wall, gabion and building block.

2. mountain area according to claim 1 middle and small river clear beach material fill construction method, is characterized in that: after step 5), protection-apron is arranged by clear beach boulder and cobble, jackstone, gabion in the riverbed near spats.

3. mountain area according to claim 2 middle and small river clear beach material fill construction method, it is characterized in that: arrange road on the bank at described levee body top by concrete, pitch and mud calculus, thickness 10cm ~ the 50cm of described road on the bank, road on the bank width is narrower than levee crown width.

4. mountain area according to claim 1 middle and small river clear beach material fill construction method, is characterized in that: stagger in point lamellar spacing in described levee body and point lamellar spacing in clay core sloping core.

5. mountain area according to claim 1 middle and small river clear beach material fill construction method, it is characterized in that: in step 3), described graded sand and stone is arranged to loaded filter on clay core sloping core surface, the thickness 10cm ~ 15cm of graded sand and stone after putting into carpenter's cloth.

6. mountain area according to claim 1 middle and small river clear beach material fill construction method, is characterized in that: in step 5), when described spats is positioned at thalweg offshore section, should extend to talweg, and should meet the requirement of riverbed limiting scour; Described spats is located at that current are smooth-going, bank slope comparatively slow section time, should protect to the gradient is riverbed, the gentle slope place of l:3 ~ 1:4, and spats width 0.3m to 0.6m, crest level is to design low water position.