CN113216248A

CN113216248A - Hydraulic engineering combined retaining wall structure and construction method thereof

Info

Publication number: CN113216248A
Application number: CN202110610873.4A
Authority: CN
Inventors: 潘庆武; 刘夫江; 王冬; 秦瑞生; 陈吉亮; 潘伟涛; 孙源
Original assignee: Shandong Linyi Water Conservancy Engineering General Co ltd
Current assignee: Shandong Linyi Water Conservancy Engineering General Co ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-08-06

Abstract

The embodiment of the invention relates to the technical field of hydraulic engineering, in particular to a combined retaining wall structure of the hydraulic engineering and a construction method thereof, which are used for protecting a river channel and comprise fish nest bricks, a gravel reverse filter layer and geogrids, wherein the adjacent fish nest bricks are staggered and dividedCloth, and is 12 as a whole⁰Staggered platform distributes, geogrid equidistance distributes in fish nest brick one side, and is adjacent be provided with the second backfill soil layer between the geogrid, still be provided with the rubble between fish nest brick and the second backfill soil layer and reverse the filter bed, and the rubble reverse filter bed is located between the adjacent geogrid, still includes: concrete foundation and gabion layer. According to the invention, the gabion layer is built above the second backfill soil layer after the fish nest bricks, so that the friction force and the soil pressure of upper soil in the backfill soil on the geogrid can be increased, the tensile stress of the upper geogrid on the retaining wall formed by the fish nest bricks is ensured, and the fish nest bricks distributed in a staggered manner can enhance the stability of the wall and provide habitation for aquatic animals and plants.

Description

Hydraulic engineering combined retaining wall structure and construction method thereof

Technical Field

The invention relates to the technical field of hydraulic engineering, in particular to a combined retaining wall structure of the hydraulic engineering and a construction method thereof.

Background

In the process of hydraulic engineering construction, the river channel is usually protected by the brick retaining wall, and the main function is to form a retaining or water retaining structure body to avoid water and soil loss.

In the existing fish nest brick retaining wall construction process, the friction force between the geogrid and the backfill soil in the upper backfill soil is small due to factors such as soil pressure and the like, so that the upper fish nest brick wall is easy to deform, distort and the like, and the integral stability of the retaining wall is poor.

Disclosure of Invention

The embodiment of the invention aims to overcome the defects in the prior art and provides a combined retaining wall structure for hydraulic engineering and a construction method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

hydraulic engineering combination retaining wall structure, including fish nest brick, rubble inverted filter and geogrid, adjacent stagger the distribution between the fish nest brick, and wholly be 12⁰Staggered platform distribution, geogrid equidistance distributes in fish nest brick one side, and is adjacent be provided with second backfill soil layer between the geogrid, still be provided with rubble reverse filter between fish nest brick and the second backfill soil layer, and rubble reverse filter is located between the adjacent geogridThe method also comprises the following steps:

the concrete base is arranged at the bottoms of the fish nest bricks, the gravel reverse-filtering layer and the second backfill soil layer; and the gabion layer is arranged at the top of the second backfill soil layer.

As a still further scheme of the invention: the concrete base comprises a plain concrete layer and a concrete pile, the plain concrete layer is arranged at the bottom of the geogrid, and the concrete pile is arranged at the bottom of the fish nest brick.

As a still further scheme of the invention: anchoring holes are formed in the fish nest bricks, and adjacent fish nest bricks are connected through anchoring rods in the anchoring holes.

As a still further scheme of the invention: reverse filter geotechnological cloth is provided with between rubble reverse filter layer and the second backfill soil layer, and reverse filter geotechnological cloth is located between the adjacent geogrid, reverse filter geotechnological cloth is located second backfill soil layer one side and is the C style of calligraphy and lays.

As a still further scheme of the invention: the gabion layer comprises a first gabion and a second gabion, and the first gabion is located at the top of the second gabion.

As a still further scheme of the invention: and a first backfill soil layer is further arranged on one side of the gabion layer.

A construction method for the construction of the above-mentioned hydraulic engineering combined retaining wall structure, comprising: measuring and lofting; excavating a foundation; pouring a concrete base; building fish nest bricks and inserting anchoring rods; laying geogrid and geotextile and backfilling after a wall; the Bingge net cages are connected in a combined way; filling stone materials; and laying the geotechnical cloth of the Bingge grid box body and backfilling the rear wall.

Compared with the prior art, the invention has the beneficial effects that:

according to the combined retaining wall structure for the hydraulic engineering, the gabion layer is built above the second backfill soil layer after the fish nest bricks, the friction force and the soil pressure of upper soil in the backfill soil to the geogrid can be increased, the tensile stress of the upper geogrid to the retaining wall formed by the fish nest bricks is guaranteed, the fish nest bricks distributed in the staggered manner can enhance the stability of the wall body and provide habitat for aquatic animals and plants, and meanwhile, the buffering effect of the retaining wall on the soil pressure can be enhanced and the reverse filtering effect can be achieved through the gravel reverse filter layer in the combined retaining wall.

Drawings

Fig. 1 is a schematic cross-sectional view of a combined retaining wall structure for hydraulic engineering according to an embodiment of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: the device comprises a first backfill soil layer 1, a first gabion 2, a second gabion 3, an anchoring rod 4, fish nest bricks 5, a reverse filtering geotextile 6, a geogrid 7, a plain concrete layer 8, a concrete pile 9, a broken stone reverse filtering layer 10 and a second backfill soil layer 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Reference will now be made in detail to implementations of the present invention with reference to specific embodiments, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1, a retaining wall structure for hydraulic engineering assembly provided by an embodiment of the present invention includes fish bricks 5, a gravel reverse filter layer 10 and geogrids 7, the specific structure of the fish bricks 5 is not limited, in this embodiment, preferably, the fish bricks 5 are self-embedded special-shaped concrete fish bricks 5 to provide living space and environment for aquatic animals and plants, and also provide functions of purifying water quality of a reservoir and resisting flood, adjacent fish bricks 5 are distributed in a staggered manner and distributed in 12 degrees staggered manner as a whole, the geogrids 7 are distributed at equal intervals on one side of the fish bricks 5, a second backfill soil layer 11 is arranged between adjacent geogrids 7, a gravel reverse filter layer 10 is further arranged between the fish bricks 5 and the second backfill soil layer 11, the specific material of the gravel reverse filter layer 10 is not limited, in this embodiment, it is preferable that the gravel reverse filter 10 is backfilled with 300mm wide graded gravel for the purpose of reinforcing the buffer effect of the retaining wall on the soil pressure and performing the reverse filtering, and the gravel reverse filter 10 is located between the adjacent geogrids 7, and further includes:

the concrete base is arranged at the bottoms of the fish nest bricks 5, the gravel reverse-filtering layer 10 and the second backfill soil layer 11; and

and the gabion layer is arranged on the top of the second backfill soil layer 11.

Through building the gabion layer in the top of second backfill soil layer 11 behind fish nest brick 5, can increase the frictional force and the soil pressure of upper soil to geogrid 7 in the backfill soil, thereby guarantee the tensile stress of the barricade that upper geogrid 7 constitutes to fish nest brick 5, and the fish nest brick 5 that is the wrong platform and distributes can play the stability of reinforcing wall body and provide habitat for aquatic animal and plant, can strengthen the barricade to the cushioning effect of soil pressure and play the refluence effect through rubble reversed filter layer 10 in the combination retaining wall simultaneously.

Referring to fig. 1 and 2, a concrete foundation includes a plain concrete layer 8 and a concrete pile 9, the plain concrete layer 8 is disposed at the bottom of the geogrid 7, and the concrete structure of the plain concrete is not limited, in this embodiment, the plain concrete layer 8 is preferably C25 plain concrete with a cross-sectional dimension of 800 × 800mm, which can enhance foundation stability and prevent uneven settlement, the concrete pile 9 is disposed at the bottom of the fish block 5, and the concrete structure of the concrete pile 9 is not limited, in this embodiment, the concrete pile 9 is preferably 100 × 100mm, which can prevent the retaining wall formed by the lower fish block 5 from displacement or deformation.

As an embodiment of the present invention, please refer to fig. 1, anchoring holes are formed in the fish nest bricks 5, the adjacent fish nest bricks 5 are connected by the anchoring rods 4 in the anchoring holes, the specific structure of the anchoring rods 4 is not limited, in this embodiment, preferably, the anchoring rods 4 are nylon rods with a length of 200mm and a diameter of 10mm, and the anchoring rods 4 are inserted between every two layers of the fish nest bricks 5, so as to ensure the overall stability of the wall.

Referring to fig. 1 and 2, as an embodiment of the present invention, a reverse filter geotextile 6 is disposed between a crushed stone reverse filter layer 10 and a second backfill layer 11, the reverse filter geotextile 6 is disposed between adjacent geogrids 7, the reverse filter geotextile 6 is disposed on one side of the second backfill layer 11 and laid in a C shape, and the specific size of the reverse filter geotextile 6 is not limited.

As an embodiment of the present invention, please refer to fig. 1, the gabion layer includes a first gabion 2 and a second gabion 3, the first gabion 2 is located on the top of the second gabion 3, and specific materials and dimensions of the first gabion 2 and the second gabion 3 are not limited, in this embodiment, preferably, the first gabion 2 and the second gabion 3 are both made of a binge mesh, and the first gabion 2 and the second gabion 3 are 1 × 1m and 1 × 1.5m respectively, so as to form a double-layered binge mesh gabion retaining wall, mesh sheets at the bottom of the binge mesh gabion body are naturally bound and connected with the net body in an up-down and left-right direction of 90 degrees, so as to ensure firm binding, in combination, the binge mesh gabion is placed above backfill soil, and through self weight thereof and gravity of the backfill soil behind the wall, so as to enhance stability of the overall structure.

Referring to fig. 1, as an embodiment of the present invention, a first backfill soil layer 1 is further disposed on one side of the gabion layer, the first backfill soil layer 1 can be matched with the gabion layer, and the stability of the overall structure can be enhanced by the self weight of the gabion layer and the gravity of the first backfill soil layer 1.

The embodiment of the invention also provides a construction method for the construction of the combined retaining wall structure of the hydraulic engineering, which comprises the following steps:

measuring and lofting: lofting the plane position, the main axis, the expansion joint and the initial point of the fish nest brick retaining wall according to a design drawing, measuring and calibrating the elevation of the longitudinal section, ensuring the construction flatness of the adjacent wall surfaces, and lofting the axis, the excavation line of the retaining wall foundation pit and the side line of the wall body;

foundation excavation: constructing by manually matching with a machine, designing 12-degree staggered platforms according to a drawing, calculating the excavation width, simultaneously tamping by using a tamper, and performing the next procedure of construction when the designed bearing capacity is achieved through detection;

pouring a concrete base: the top of the foundation of the base is provided with a concrete pile to prevent the fish nest bricks from slipping, meanwhile, the foundation of the base adopts C25 plain concrete with the section size of 800 x 800mm, after the concrete pouring is finished, the wall body is maintained, and the next process construction can be carried out after the maintenance period is reached;

building fish nest bricks and inserting anchoring rods, wherein the first layer of fish nest is placed in order by using auxiliary methods such as stay wires and the like, the first layer of fish nest bricks is calculated to be staggered by about 3cm in the vertical direction, so that the anchoring rods are convenient to install and the stability of a wall body is ensured, the anchoring rods are nylon rods with the length of 200mm and the diameter of 10mm, the nylon rods have good bending resistance and durability, the top surfaces of the fish nest bricks are flush or slightly lower when the anchoring rods are inserted, the seams between the fish nest bricks are ensured to be neat and free of sundries, the staggered platforms of the upper layer and the lower layer are ensured to be meshed to play a role in shearing resistance during building, the anchoring rods are accurately aligned during inserting, the brick bodies can be moved back and forth to ensure that the anchoring rods are accurately inserted when necessary, a control line is required to be arranged on the slope surface of the building body during building, the integral flatness of the fish nest bricks is ensured to meet the design requirements, and the flatness and the attractiveness of the retaining wall during building are ensured, building is carried out in sequence from bottom to top, and local leveling calibration is carried out on each layer after building is completed;

laying geogrid and geotextile and backfilling behind walls: adopting geogrid with the length of 2700mm, ensuring the flatness of a laying surface before laying, marking a laying position on the laying surface according to the width of each frame in order to ensure the laying verticality, then laying the geogrid, laying a layer of geogrid for each laying of three layers of fish nest bricks, fixing the top end of the geogrid between every two layers of fish nest bricks, penetrating and fixing the geogrid by using an anchoring rod, generating inward horizontal tension on a wall body, enhancing the stability of the wall body, laying the geogrid forwards after fixing the end part of the geogrid, straightening and leveling manually every 10m when laying, ensuring that the whole geogrid has no wrinkles, distortion and the like, paying attention to the inaccurate occurrence of gaps between the two geogrids when laying, ensuring seamless connection, fixing the geogrids by using iron nails, wood wedges or binding wires, carrying out overall quality inspection after laying of one section of the geogrid, and continuously laying after being qualified, laying geotextiles on the retaining wall to prevent loss of the soil on the bank side, cutting the geotextiles into geotextiles with each length of 6m and the width of 400mm from top to bottom according to a design drawing, ensuring that each two connected parts are overlapped by more than 200mm when laying, ensuring seamless connection, compacting and fixing the geogrids between fish nest bricks to ensure that the geotextiles do not wrinkle when backfilling, backfilling the wall after the first layer of geogrids is laid, backfilling and compacting by adopting 300mm wide graded broken stones and backfilled soil, reversely folding the first layer of geotextiles to level after the completion of the backfilling, and then performing horizontal measurement to prevent uneven filling thickness;

the Bingge net cage body is connected in a combined way: firstly, leveling the upper side of a fish nest brick, then selecting a gabion cage with the size of 1 multiplied by 1m and 1 multiplied by 1.5m for manual assembly and binding, wherein the bottom net sheet and the net body of the gabion cage body are bound and connected naturally in an up-down and left-right binding mode at an angle of 90 degrees, so that the binding is firm, after the binding is finished, arranging the gabion cage body, paying off the line before arranging the cage body, determining the arrangement position of the gabion, binding and fixing the cage body and the cage body by using stranded steel wires, so that the connection is firmer, and before loading, supporting and reinforcing the gabion by using steel pipes, so that the stability of the cage body is guaranteed;

filling stones: the filling stone material meets the requirements of design and specification, the stone material is selected from flat and uniform block stones which are hard in texture and difficult to hydrolyze and weather, the maximum size of the block stones is not more than 40cm, unqualified stone materials such as shale, hydrolyzed stone, small broken stone and the like are forbidden to use, the stone in the box body is lost, so that the gabion loses the effect, the stone material is filled by adopting a mode of combining artificial machinery during filling, firstly, mechanical equipment is used for filling to half of the gabion, then, manual leveling and stacking are carried out, and small stone blocks are used for filling gaps, so that the gabion is attractive and practical;

laying the geotechnical cloth of the Bin grid box body and backfilling the rear wall: the Bingge net cage body is placed above the backfill soil behind the fish nest brick, the reversed filtering geotextile is laid to the top along the outer side of the net cage, the geotextile is prevented from moving, puncturing, wrinkling and the like during laying, and the backfill soil is backfilled to the top of the net cage and tamped after the geotextile is laid.

When in use, the friction force and the soil pressure of the upper soil layer to the geogrid 7 in the backfill soil can be increased by building the gabion layer above the second backfill soil layer 11 behind the fish nest bricks 5, so as to ensure the tensile stress of the upper geogrid 7 to the retaining wall formed by the fish nest bricks 5, the fish nest bricks 5 distributed in a staggered manner can enhance the stability of the wall and provide habitat for aquatic animals and plants, the anchoring rods 4 are inserted between every two layers of fish nest bricks 5 to ensure the integral stability of the wall, the foundation stability can be enhanced by the plain concrete layer 8 to prevent uneven settlement, the retaining wall formed by the fish nest bricks 5 at the lower layer can be prevented from displacement or deformation by the concrete piles 9, meanwhile, the buffering effect of the retaining wall on the soil pressure can be enhanced by the gravel reverse filter layer 10 in the combined retaining wall and the reverse filtering effect is achieved, the reverse filtering cloth 6 is also arranged between the gravel reverse filter layer 10 and the second backfill soil layer 11, and the soil is laid in a C shape, so that the purpose of preventing the soil from flowing into the reservoir can be achieved.

It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications, improvements and substitutions can be made, which are all within the protection scope of the present technical solution.

Claims

1. The utility model provides a hydraulic engineering combination retaining wall structure, a serial communication port, including fish nest brick, rubble inverted filter and geogrid, adjacent stagger the distribution between the fish nest brick, and wholly be 12 degrees staggered platforms and distribute, geogrid equidistance distributes in fish nest brick one side, and is adjacent be provided with second backfill soil layer between the geogrid, still be provided with rubble inverted filter between fish nest brick and the second backfill soil layer, and rubble inverted filter is located between the adjacent geogrid, still includes:

2. A hydraulic engineering combination retaining wall structure of claim 1, characterized in that, the concrete base includes plain concrete layer and concrete buttress, plain concrete layer sets up in the bottom of geogrid, concrete buttress sets up in the bottom of fish nest brick.

3. A water conservancy project combination retaining wall structure of claim 2, characterized in that anchor holes are opened on the fish nest bricks, and adjacent fish nest bricks are connected through anchor bars in the anchor holes.

4. A hydraulic engineering combination retaining wall structure according to claim 3, characterized in that is provided with between rubble reversed filter layer and the second backfill layer reversed filter geotechnological cloth, and reversed filter geotechnological cloth is located between adjacent geogrids, reversed filter geotechnological cloth is located second backfill layer one side and is the C style of calligraphy and lays.

5. A hydraulic engineering combination retaining wall structure of claim 4, characterized in that, the gabion layer includes first gabion and second gabion, first gabion is located the top of second gabion.

6. A hydraulic engineering combination retaining wall structure of claim 5, characterized in that one side of gabion layer is further provided with a first backfill layer.

7. A construction method is used for the construction of the hydraulic engineering combined retaining wall structure, and is characterized by comprising the following steps:

measuring and lofting;

excavating a foundation;

pouring a concrete base;

building fish nest bricks and inserting anchoring rods;

laying geogrid and geotextile and backfilling after a wall;

the Bingge net cages are connected in a combined way;

filling stone materials;

and laying the geotechnical cloth of the Bingge grid box body and backfilling the rear wall.