CN212801052U

CN212801052U - High embankment structure of filling

Info

Publication number: CN212801052U
Application number: CN202021358743.3U
Authority: CN
Inventors: 姬树军; 杨云志; 陈智鹏; 卢大鹏; 周龙
Original assignee: Sinohydro Bureau 7 Co Ltd
Current assignee: Sinohydro Bureau 7 Co Ltd
Priority date: 2020-07-12
Filing date: 2020-07-12
Publication date: 2021-03-26
Anticipated expiration: 2030-07-12

Abstract

The utility model discloses a high embankment structure of filling out. A plurality of layers of drainage blind ditches and geogrids among the drainage blind ditches of each layer are arranged in the embankment structure from bottom to top; each drainage blind ditch is a drainage blind ditch net with a grid structure formed by longitudinal blind ditches and transverse blind ditches which are intersected longitudinally and transversely, the side length of each grid is 12-15 m, and the distance between the upper layer and the lower layer of each adjacent drainage blind ditch is not more than 5 m; all planes of each layer of geogrid are laid and arranged on a plane which is not less than 50cm away from the lower part of the upper drainage blind ditch layer; both sides of the embankment in the transverse direction are respectively provided with a foot wall or a drainage gully; the utility model has the advantages that the longitudinal and transverse solid blind ditches are arranged to drain accumulated water, and the geogrid is arranged to prevent the high fill embankment from settling and deforming, thereby improving the safety of the engineering; compared with the traditional sand gravel with good grading, the steel bar net is laid between layers, and measures such as a load reduction culvert are arranged, so that the great economic advantages are achieved, and the problems of overlarge settlement and unsmooth embankment drainage can be effectively solved.

Description

High embankment structure of filling

Technical Field

The utility model belongs to the technical field of the building engineering construction, especially, belong to road drainage engineering construction technical field, in particular to high embankment drainage structures of filling out arranges.

Background

At present, because a high-fill embankment is excessively high in filling, the settlement period is short, the construction period is influenced by precipitation, construction processes and the like, and large embankment settlement often occurs in the later period to cause embankment diseases. The embankment filler is generally filled by adopting soil and stones, the influence of water is large, the landslide is caused due to unsmooth drainage, and the influence is brought to later-stage operation.

The existing solutions include: the method adopts the measures of well grading sand gravel, laying steel bar meshes between layers, arranging a load reducing culvert and the like, can solve the defect of high filling of the roadbed, but has larger investment, large construction difficulty and poor economic benefit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a fill out embankment structure highly according to prior art's not enough. The utility model aims at providing a high embankment drainage structures that fills arranges and construction method for solve the embankment and subside and the drainage, prevent the embankment deformation to the influence of structure.

The utility model discloses a following technical scheme realizes:

high embankment structure of filling up, the embankment that fills up is higher than basic ground through filling up the structure of filling up, its characterized in that: a plurality of layers of drainage blind ditches and geogrids among the drainage blind ditches of each layer are arranged in the embankment structure from bottom to top; each drainage blind ditch is a drainage blind ditch net with a grid structure formed by longitudinal blind ditches and transverse blind ditches which are intersected longitudinally and transversely, the side length of each grid is 12-15 m, and the distance between the upper layer and the lower layer of each adjacent drainage blind ditch is not more than 5 m; all planes of each layer of geogrid are laid and arranged on a plane which is not less than 50cm away from the lower part of the upper drainage blind ditch layer; and foot protection walls or drainage gullies are respectively arranged on the two transverse sides of the embankment.

And the blind ditch at the bottommost layer of the embankment is paved along the foundation ground.

The arrangement axis of the longitudinal blind ditches is consistent with the axis of the embankment; when both sides of the transverse blind ditch are of high filling structures, the transverse blind ditch is arranged along a horizontal plane according to a herringbone slope, the gradient is not less than 5 percent, and when both sides of the transverse blind ditch are of semi-excavation semi-filling structures or one side of the transverse blind ditch is of a high filling structure and one side of the transverse blind ditch is of a low filling structure, the transverse blind ditch is arranged into a one-way slope, the gradient of which; and the slope of the drainage blind ditch at the bottommost layer is not less than 5% of the slope of the drainage blind ditch introduced to the drainage gully at one side of the embankment.

The geogrid adopts a steel-plastic high-strength grid structure, the tensile strength is more than or equal to 80KN/m, the elongation is less than or equal to 3%, and the contact strength of the geogrid is not less than 1.5 Mpa.

The geogrid is connected into the net pieces through connecting seams by adopting bamboo drill rods, polyester fibre lines or U-shaped nails to form a whole, and the overlapping width of the adjacent geogrid net pieces is not less than 25 cm.

The construction method adopting the high fill embankment structure comprises the following steps: and after the surface of the embankment is cleaned and the field is leveled, a first layer of drainage blind ditches are arranged, the foundation is filled after the drainage blind ditches are finished, the thickness of each layer is 30-50cm, when the filling thickness is more than 3m, geogrids are laid on the surface layer, the thickness of soil paved on the tops of the geogrids is 50cm, a second layer of drainage blind ditches are arranged, and the construction is repeated until the top of the embankment is leveled.

The utility model provides a pair of embankment structure is filled to height, indulge through the setting, horizontal solid core french drain gets rid of ponding, sets up geogrid and prevents that embankment is filled to height from subsiding the deformation, has improved the security of engineering. The utility model discloses the used material of solid core french drain can be gathered materials on the spot, and the geogrid price is also lower, and the contrast tradition adopts the good sand gravel of gradation, lays the reinforcing bar net piece between the layer, sets up measures such as off-loading culvert and has great economic advantage, can effectively solve and subside too big, the not smooth problem of embankment drainage.

Drawings

Fig. 1 is a schematic structural view of a high fill embankment of the present invention;

description of reference numerals: the method comprises the following steps of 1-longitudinal blind ditches, 2-transverse blind ditches, 3-geogrids, 4-transverse slopes, 5-embankment side slopes, 6-toe guard walls and 7-drainage gullies.

Detailed Description

The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.

With reference to the attached drawings.

As shown in the figure, the high fill embankment structure is an embankment which is higher than the foundation ground and is constructed by filling, and a plurality of layers of drainage blind ditches and geogrids 3 among the drainage blind ditches are arranged in the embankment structure from bottom to top; each drainage blind ditch comprises a drainage blind ditch net with a grid structure, wherein longitudinal blind ditches 1 and transverse blind ditches 2 which are intersected longitudinally and transversely are arranged on each layer, the side length of each grid is 12-15 m, and the distance between the upper layer and the lower layer of each adjacent drainage blind ditch is not more than 5 m; each layer of geogrid 3 is laid on a plane which is not less than 50cm below the upper drainage blind ditch layer in a full plane; and foot protection walls 6 or drainage gullies 7 are respectively arranged on the two transverse sides of the embankment.

And paving the blind ditch at the bottommost layer of the embankment along the foundation ground.

The arrangement axis of the longitudinal blind ditch 1 is consistent with the axis of the embankment; when both sides of the transverse blind ditch 2 are high-fill structures, the transverse blind ditch is arranged along a horizontal plane according to a herringbone slope, the gradient is not less than 5 percent, and when both sides are half-excavation half-fill or one side is high-fill and one side is low-fill structures, the transverse blind ditch is arranged to be a one-way slope with the gradient not less than 5 percent; and the slope of the drainage blind ditch at the bottommost layer is not less than 5 percent of the drainage blind ditch 7 led to one side of the embankment.

The geogrid 3 adopts a steel-plastic high-strength grid structure, the tensile strength is more than or equal to 80KN/m, the elongation is less than or equal to 3%, and the contact strength of the geogrid 3 is not less than 1.5 Mpa.

The geogrids 3 are connected into net pieces by adopting bamboo drill rods, polyester fiber lines or U-shaped nails to be connected into a whole through connecting seams, and the overlapping width of the adjacent geogrids 3 net pieces is not less than 25 cm.

The construction comprises the following steps: after the surface of the embankment is cleaned and the field is leveled, a first drainage blind ditch layer is arranged, the foundation is filled after the drainage blind ditch is completed, the thickness of each layer is 30-50cm, when the filling thickness is larger than 3m, the geogrid 3 is laid on the surface layer, the thickness of the soil laid on the top of the geogrid 3 is 50cm, a second drainage blind ditch layer is arranged, and the construction is repeated until the top of the embankment.

As shown in the figure, the construction process of the high fill embankment of the embodiment is specifically described below with reference to the accompanying drawings:

1. leveling the field, treating foundation soil, arranging a first layer of drainage blind ditch, and filling the roadbed to the top surface of the blind ditch.

2. Geogrid 3 is laid on the top surface of the blind ditch, and geogrid 3 is laid on the slope embankment transversely along the roadbed. When laying the geogrid 3, the geogrid 3 needs to be connected and straightened smoothly. Geogrid 3 indulges, horizontal seam can adopt bamboo borer or wash the method of fibre line seam or U type nail connection to link geogrid 3 into whole, and geogrid 3 overlap joint width of each other is not less than 25cm, and the intensity at the direction of force bearing junction is not less than material design tensile strength. When the geogrid 3 is laid, the geogrid 3 is straightened by hand, so that the geogrid 3 is smooth and uniform, and the geogrid is fixed on the ground by hook nails every 1.5-2.0 m.

3. And filling the filler within 48 hours after the geogrid 3 is laid, wherein the maximum particle size of the filler on the upper side and the lower side of the geogrid 3 is not more than 2/3 of the layer thickness, and the particle size of the filler within 8cm from the layer 3 of the geogrid is not more than 6 cm. And each layer of filling is symmetrically carried out according to the principle of firstly filling two sides and then filling the middle, and the filling mode of firstly filling the middle part of the embankment and then filling the two sides is strictly forbidden. The filler is not allowed to be directly unloaded on the geogrid and must be unloaded on the paved soil surface, and the unloading height is not more than 1 m. Vehicles and construction machinery travel in the direction of the axis of the embankment and are prohibited from traveling on the laid geogrid 3.

4. After the first layer of soil reaches the preset thickness and is rolled to the designed compactness, the geogrid 3 is rolled back and wrapped for 2m and bound on the geogrid 3 of the previous layer, the anchoring is adjusted manually, and soil is filled for 1.0m outside the rolled end to protect the geogrid 3 and prevent the artificial damage.

4. And finishing the first layer of grating pavement according to the procedures, and paving other gratings according to the same steps. After the grid is laid, the upper embankment is filled.

5. And finishing the first layer of grating pavement according to the procedures, and paving other gratings according to the same steps. After the grid is laid, the upper embankment is filled until the next layer of blind ditch.

6. The geogrid 3 is made of steel-plastic high-strength grids, the tensile strength is more than or equal to 80KN/m, the elongation is less than or equal to 3%, and the contact strength of the geogrid 3 is not less than 1.5 Mpa.

7. The blind ditches are arranged in a net shape with the longitudinal and transverse intervals of 15m, and the thickness of filled soil between the blind ditches and the geogrids 3 is not less than 50cm during construction, so that water resistance is facilitated. The longitudinal blind ditches are consistent with the longitudinal slopes of the routes, and if the two sides of the transverse blind ditches are filled with high fillings, the transverse blind ditches are arranged along the ground line according to a herringbone slope, and the gradient is not less than 5%; if the filling is half-digging and half-filling or one side is high and one side is low, a one-way slope with the gradient not less than 5% is set, and the bottom blind ditch is led to the ditch of the filling along the ground line.

8. The embankment is pre-pressed for 6 months after being completed, and then protection construction of road surfaces, side slopes and the like can be carried out. And finishing the construction of the high fill embankment structure.

Claims

1. A highly filled embankment structure, the highly filled embankment being constructed by filling above a foundation ground, characterized in that: a plurality of layers of drainage blind ditches and geogrids among the drainage blind ditches of each layer are arranged in the embankment structure from bottom to top; each drainage blind ditch is a drainage blind ditch net with a grid structure formed by longitudinal blind ditches and transverse blind ditches which are intersected longitudinally and transversely, the side length of each grid is 12-15 m, and the distance between the upper layer and the lower layer of each adjacent drainage blind ditch is not more than 5 m; all planes of each layer of geogrid are laid and arranged on a plane which is not less than 50cm away from the lower part of the upper drainage blind ditch layer; and foot protection walls or drainage gullies are respectively arranged on the two transverse sides of the embankment.

2. The high fill embankment structure of claim 1, wherein: and the blind ditch at the bottommost layer of the embankment is paved along the foundation ground.

3. The high fill embankment structure of claim 2, wherein: the arrangement axis of the longitudinal blind ditches is consistent with the axis of the embankment; when both sides of the transverse blind ditch are of high filling structures, the transverse blind ditch is arranged along a horizontal plane according to a herringbone slope, the gradient is not less than 5 percent, and when both sides of the transverse blind ditch are of semi-excavation semi-filling structures or one side of the transverse blind ditch is of a high filling structure and one side of the transverse blind ditch is of a low filling structure, the transverse blind ditch is arranged into a one-way slope, the gradient of which; and the slope of the drainage blind ditch at the bottommost layer is not less than 5% of the slope of the drainage blind ditch introduced to the drainage gully at one side of the embankment.

4. The high fill embankment structure of claim 3, wherein: the geogrid adopts a steel-plastic high-strength grid structure with the tensile strength of more than or equal to 80KN/m, the elongation of less than or equal to 3 percent and the contact strength of the geogrid of not less than 1.5 Mpa.

5. The high fill embankment structure of claim 3, wherein: the geogrid is connected into the net pieces through connecting seams by adopting bamboo drill rods, polyester fibre lines or U-shaped nails to form a whole, and the overlapping width of the adjacent geogrid net pieces is not less than 25 cm.