A flexible surface support structure system for loess areas and its construction method

Abstract

The present invention provides a flexible surface layer support structure system and construction method for loess areas, wherein a flexible surface layer support structure system for loess areas includes constructing a flexible anti-seepage layer on a loess slope, a mixed bonding layer for bonding arranged on the flexible anti-seepage layer, a fiber grid arranged on the mixed bonding layer, a plurality of anchor plates arranged evenly on the fiber grid for comprehensive fixation of the fiber grid and the flexible anti-seepage layer, and a lattice beam arranged at the upper end of the fiber grid. The construction method of the above system is also disclosed. In the present invention, the fiber grid has a certain flexibility, which can make the protective surface form a flexible base surface, and can be laid out according to the shape of the slope.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection, in particular to a slope protection technology in loess areas, specifically to a flexible surface layer support structure system for loess areas and a construction method thereof. Background Art

[0002] Loess gullies are widely distributed in my country. The existing slope protection mainly uses lattice beams to protect the slope surface. Diamond, rectangular or herringbone lattice beams are set on the slope surface to consolidate the slope surface and prevent soil erosion on the slope surface. This technical means requires a large amount of reinforced concrete to form concrete protection, and anti-slide piles or retaining walls are used for auxiliary protection; therefore, it is generally necessary to use steel mesh and shotcrete treatment on the slope surface; mortar-laid stone retaining walls, anti-slide piles, and anti-slide anchors (anchor cables) are used in the main sliding section of the landslide. This method is costly, especially in mountainous areas with inconvenient transportation, which often brings great inconvenience to construction.

[0003] The above-mentioned technical means basically follow the methods of treating expansive soil slopes. There is a big difference between loess and expansive soil. There is no outward expansion force in the loess matrix. Its tension on the slope is its own self-sustaining force. The viscosity of loess is greater than that of expansive soil. When it encounters water, its self-sustaining force will decrease, thus causing a slide. In addition, the treatment of loess slopes is also very different from that of loess roadbeds. The loess roadbed can use the viscosity of loess to compact the mixed mortar composed of loess and cement, but in slope treatment, the method of compacting the surface is completely impractical.

[0004] Therefore, the present invention mainly constructs a new method for loess slope management based on the self-sustaining capacity of loess itself. Summary of the invention

[0005] The object of the present invention is to provide a flexible surface support structure system and a construction method for use in loess areas to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A flexible surface support structure system for loess areas, comprising

[0008] Constructing a first loess mixed protective layer on the loess slope, the first loess mixed protective layer is used to improve the viscosity of the loess and the self-supporting capacity of the loess slope;

[0009] A flexible anti-seepage layer is laid on the first loess mixed protective layer.

[0010] a mixed bonding layer for bonding arranged on the flexible anti-seepage layer,

[0011] A fiber mesh is provided on the mixed bonding layer, wherein the fiber mesh is used to enhance the support strength of the flexible anti-seepage layer.

[0012] A plurality of anchoring plates are provided and evenly arranged on the fiber grid, and are used for comprehensive fixing of the fiber grid and the flexible anti-seepage layer.

[0013] A second loess mixed protective layer is arranged on the upper end of the fiber grid.

[0014] A third loess mixed protective layer is arranged on the second loess mixed protective layer,

[0015] Lattice beams are set on the third loess mixed protective layer.

[0016] Furthermore, the flexible anti-seepage layer is made of anti-seepage and fireproof geotextile.

[0017] Furthermore, the fiber mesh is a plurality of spliced ​​fiber mesh units woven from one of glass fiber and carbon fiber, and the anchoring plate is arranged at the overlapping position of the fiber mesh units.

[0018] Furthermore, the anchor plate includes a lower positioning component and an upper fixing component with the same upper and lower specifications.

[0019] The lower positioning assembly includes a lower positioning plate and a lower damping rubber layer arranged on the lower positioning plate.

[0020] The upper fixing assembly includes an upper fixing plate and an upper damping rubber layer disposed under the upper fixing plate.

[0021] The fiber grid is fixed between the lower damping rubber layer and the upper damping rubber layer,

[0022] The soil nails pass through the inclined holes and the mixed bonding layer, the flexible anti-seepage layer and the first loess mixed protective layer and are fixed in the loess slope.

[0023] Furthermore, an anchor hole is provided in the middle of the anchor plate, and an inclined hole is provided in the circumference of the anchor hole, and the inclined hole is inclined outwardly by 30 to 45 degrees based on the aperture axis of the anchor hole.

[0024] Furthermore, an anchor rod is arranged in the anchor hole, one end of the anchor rod passes through the mixed bonding layer, the flexible anti-seepage layer and the first loess mixed protective layer in sequence and is fixed in the loess slope, and the other end of the anchor rod passes through the anchor plate and is locked by an anchor fixed above the anchor plate.

[0025] Furthermore, the lattice beam is a slope support beam made of loess cement slurry.

[0026] The present invention also provides a construction method for a flexible surface support structure system for loess areas, comprising the following steps:

[0027] Step (1) tidying up the loess slope: leveling the loess slope so that the loess slope is roughly inclined along the slope surface, and then measuring and planning the specifications of the fiber mesh used therein;

[0028] Step (2) constructing a first loess mixed protective layer: spraying a loess-cement slurry mixture on the finished loess slope to construct the first loess mixed protective layer;

[0029] Step (3) constructing soil nail holes and anchor holes: according to the specifications of the fiber mesh used, drilling soil nail holes and anchor holes for fixing anchor plates and arranged transversely along the first loess mixed protective layer are formed, soil nails are inserted into the soil nail holes, and loess cement slurry mixture II is injected into the soil nail holes; anchor rods are fixedly inserted into the anchor holes, and loess cement slurry mixture II is injected into the anchor holes;

[0030] Step (4) laying a flexible anti-seepage layer: laying a flexible anti-seepage layer on the first loess mixed protective layer and making the soil nails pass through the flexible anti-seepage layer;

[0031] Step (5) laying the fiber mesh: spray a uniform layer of loess cement slurry mixture three on the flexible anti-seepage layer, level it to form a mixed bonding layer, bond the lower positioning plate and the lower damping rubber layer to form a lower positioning assembly, the lower positioning assembly is fixed along the soil nails and anchor rods, and then a fiber mesh unit is laid on the mixed bonding layer, the two fiber mesh units are connected and overlapped, and the overlapping position is located above the lower positioning assembly, the upper fixing assembly is fixed above the lower positioning assembly by the soil nails and anchor rods, the anchor rods are locked by anchors, and the soil nails are bent and fixed above the upper fixing assembly;

[0032] Step (6) constructing a second loess mixed protective layer: spraying a loess-cement slurry mixture on the fiber grid to construct the second loess mixed protective layer;

[0033] Step (7) constructing a third loess mixed protective layer: spraying a loess-cement slurry mixture 5 on the fiber grid to construct the third loess mixed protective layer;

[0034] Step (8) arranging the lattice beams: vertically arranging the lattice beam reinforcement cages on the third loess mixed protective layer, supporting the formwork on the lattice beam reinforcement cages and pouring the loess cement slurry mixture 2 to form the lattice beams.

[0035] In step 2), the cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:6-8:2-5, and the mixed slurry is laid on the surface of the loess slope from top to bottom;

[0036] The loess cement slurry mixture three is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:4-5:1-3, and the mixed slurry is laid on the surface of the flexible anti-seepage layer from top to bottom;

[0037] The loess cement slurry mixture 4 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:3 to 4:1 to 3, and the mixed slurry is laid on the surface of the fiber grid from top to bottom;

[0038] The loess cement slurry mixture five is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:7 to 9:3 to 5, and the mixed slurry is laid on the surface of the third loess mixed protective layer from top to bottom.

[0039] In step 3), the second loess cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 3:6-8:2.5-4.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] In the present invention, loess cement slurry is a nearly colloidal substance formed by mixing loess and clean water with an appropriate amount of cement. It has similar properties to concrete and can be cast into various shapes as needed. The solid formed after solidification has high strength and can meet the effects of slope protection and scour prevention.

[0042] In the present invention, the purpose of adding cement to the first loess mixed protective layer is to improve the viscosity and self-supporting power of the loess, reduce the surface tension, and allow the self-supporting power to change to a certain extent. For example, when it is reduced from 80KN to 40KN, the self-supporting power will be naturally released without affecting the surface layer.

[0043] In the present invention, the purpose of adding cement to the second loess mixed protective layer is to improve the viscosity and self-supporting power of the loess. In this layer, the viscosity plays a greater role, so that when the surface layer releases its self-supporting power, the second layer can play a compensating role.

[0044] In the present invention, the third loess mixed protective layer is added with cement in order to improve the viscosity and self-supporting capacity of the loess so that the self-supporting capacity will not be reduced after contacting water.

[0045] In the present invention, geotextile + fiber grid is used to replace the protective structure of geotextile + reinforced concrete, which is economical, simple to make, and has a wide range of raw materials that can be obtained locally.

[0046] In the present invention, the fiber grid has a certain flexibility, which can make the protective surface form a flexible base surface, and can be laid out in accordance with the shape of the slope, without the need to strictly arrange the broken surface, thus saving the process time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural diagram of the flexible surface layer support structure system in the present invention;

[0048] Figure 2 It is a layout diagram of the lattice beam in the present invention;

[0049] Figure 3 is a structural diagram of the fiber mesh in the present invention;

[0050] Figure 4 is a structural diagram of the anchor plate in the present invention;

[0051] Figure 5 It is a fixed structure diagram of the anchor plate in the present invention;

[0052] Figure 6 It is a layout diagram of the anchor plate in the present invention. DETAILED DESCRIPTION

[0053] The present invention is described in detail below with reference to the accompanying drawings.

[0054] Reference Figures 1 to 6 The present invention provides a flexible surface support structure system for loess areas, including constructing a first loess mixed protective layer 2 on a loess slope 1, wherein the first loess mixed protective layer 2 is used to improve the viscosity of the loess and the self-supporting force of the loess slope;

[0055] A flexible anti-seepage layer 3 is laid on the first loess mixed protective layer 2, and the flexible anti-seepage layer 3 is made of fireproof and waterproof geotextile.

[0056] A mixed bonding layer 4 for bonding is arranged on the flexible anti-seepage layer 3, and the mixed bonding layer 4 is used to fix the fiber mesh on the flexible anti-seepage layer 3. When laying the mixed bonding layer 4, cement, loess and water are mixed in a mass ratio of 1:4:2 to form a loess slurry mixture, and the loess slurry mixture is sprayed on the surface of the flexible anti-seepage layer 3, one is used to fix the flexible anti-seepage layer 3, and the other is to use the loess slurry mixture to fix the fiber mesh.

[0057] The fiber mesh 5 is arranged on the mixed bonding layer 4, and the fiber mesh 5 is used to enhance the support strength of the flexible anti-seepage layer. In the present invention, the mesh density of the fiber mesh 5 is 300 to 600 pieces / m 2 A plurality of anchoring plates 9 are provided and evenly arranged on the fiber grid 5, and are used for comprehensive fixing of the fiber grid 5 and the flexible anti-seepage layer 3.

[0058] A second loess mixed protective layer 6 is provided on the upper end of the fiber grid 5.

[0059] A third loess mixed protective layer 7 is provided on the second loess mixed protective layer 6.

[0060] Lattice beams 8 are arranged on the third loess mixed protective layer 7 .

[0061] In the above, the fiber mesh 5 is a plurality of spliced ​​fiber mesh units woven from one of glass fiber and carbon fiber, and the anchoring plate 5 is arranged at the overlapping position of the fiber mesh units.

[0062] In the above, the anchor plate 9 includes a lower positioning assembly and an upper fixing assembly with the same upper and lower specifications. The lower positioning assembly includes a lower positioning plate 98 and a lower damping rubber layer 97 arranged on the lower positioning plate. The lower damping rubber layer 97 is provided with a lower damping tooth 96.

[0063] The upper fixing assembly includes an upper fixing plate 93 and an upper damping rubber layer 94 disposed below the upper fixing plate 93, and an upper damping tooth 95 disposed below the upper damping rubber layer 94.

[0064] The fiber grid 5 is fixed between the lower damping rubber layer and the upper damping rubber layer, and is fixed by the engagement of the lower damping teeth 96 and the upper damping teeth 95 .

[0065] In the above, the anchor plate 9 is provided with an anchor hole 900 in the middle, and an inclined hole 901 is provided around the anchor hole 900, and the inclined hole 901 is inclined outward by 30-45° based on the aperture axis of the anchor hole 900. The soil nail 92 passes through the inclined hole 901 and passes through the mixed bonding layer 4, the flexible anti-seepage layer 3 and the first loess mixed protective layer 2 and is fixed in the loess slope 1.

[0066] An anchor rod 91 is arranged in the anchor hole 900, one end of the anchor rod 91 passes through the mixed bonding layer 4, the flexible anti-seepage layer 3 and the first loess mixed protective layer 2 in sequence and is fixed in the loess slope 1, and the other end of the anchor rod 91 passes through the anchor plate 9 and is locked by the anchor 90 fixed above the anchor plate.

[0067] In the above description, the lattice beam 8 is a slope support beam made of loess cement slurry.

[0068] Example 1

[0069] The present invention also provides a construction method for a flexible surface support structure system for loess areas, comprising the following steps:

[0070] Step (1) tidying up the loess slope: leveling the loess slope so that the loess slope is roughly inclined along the slope surface, and then measuring and planning the specifications of the fiber mesh used therein;

[0071] Step (2) constructing a first loess mixed protective layer: spraying a loess cement slurry mixture on the finished loess slope to construct the first loess mixed protective layer; the cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:6:3, and the mixed slurry is laid on the surface of the loess slope from top to bottom; in the present invention, the purpose of adding cement to the first loess mixed protective layer is to improve the viscosity and self-supporting power of the loess, reduce the surface tension, and allow the self-supporting power to have a certain change, for example, when it is reduced from 80KN to 40KN, the self-supporting power will be naturally released without affecting the surface layer.

[0072] Step (3) constructing soil nail holes and anchor holes: according to the specifications of the fiber mesh used, drill soil nail holes and anchor holes for fixing anchor plates arranged transversely along the first loess mixed protective layer on the first loess mixed protective layer, insert soil nails into the soil nail holes, and inject loess cement slurry mixture 2 into the soil nail holes; insert anchor rods into the anchor holes, and inject loess cement slurry mixture 2 into the anchor holes; in the present invention, the loess cement slurry mixture 2 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 3:6:2.5. The purpose of adding cement to this loess cement slurry mixture 2 is to form a concrete-like structure, which is convenient for fixing soil nails and anchor rods. When drilling, the soil nail holes and anchor holes can be straight holes along a certain axis or spiral holes along a certain axis.

[0073] Step (4) laying a flexible anti-seepage layer: laying a waterproof and fireproof geotextile on the first loess mixed protective layer and making the soil nails penetrate the waterproof and fireproof geotextile;

[0074] Step (5) laying the fiber grid: spray a uniform layer of loess cement slurry mixture three on the waterproof and fireproof geotextile, level it to form a mixed bonding layer, bond the lower positioning plate and the lower damping rubber layer to form a lower positioning component, the lower positioning component is fixed along the soil nails and anchor rods, and then lay the fiber mesh unit on the mixed bonding layer, the connection of the two fiber mesh units is overlapped, and the overlapping position is located above the lower positioning component, the upper fixing component is fixed above the lower positioning component by the soil nails and anchor rods, the anchor rods are locked by anchors, and the soil nails are bent and fixed above the upper fixing component; the loess cement slurry mixture three is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:4:1, and the mixed slurry is laid on the surface of the flexible anti-seepage layer from top to bottom;

[0075] Step (6) constructing a second loess mixed protective layer: spraying a loess cement slurry mixture four on the fiber mesh to construct a second loess mixed protective layer; the loess cement slurry mixture four is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:3:1, and the mixed slurry is laid on the fiber mesh surface from top to bottom; the second loess mixed protective layer, the purpose of adding cement is to improve the viscosity and self-supporting power of the loess. In this layer, the viscosity plays a greater role, so that when the surface layer releases its self-supporting power, the second layer can play a compensating role.

[0076] Step (7) constructing the third loess mixed protective layer: spraying loess cement slurry mixture 5 on the fiber grid to construct the third loess mixed protective layer; the loess cement slurry mixture 5 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:7:3, and the mixed slurry is laid on the surface of the third loess mixed protective layer from top to bottom. The purpose of adding cement to the third loess mixed protective layer is to improve the viscosity and self-sustaining power of the loess, so that the self-sustaining power will not decrease after encountering water, while maintaining the basic form of the loess.

[0077] Step (8) arranging the lattice beams: vertically arranging the lattice beam reinforcement cages on the third loess mixed protective layer, supporting the formwork on the lattice beam reinforcement cages and pouring the loess cement slurry mixture 2 to form the lattice beams.

[0078] Example 2

[0079] The present invention also provides a construction method for a flexible surface support structure system for loess areas, comprising the following steps:

[0080] Step (1) tidying up the loess slope: leveling the loess slope so that the loess slope is roughly inclined along the slope surface, and then measuring and planning the specifications of the fiber mesh used therein;

[0081] Step (2) constructing a first loess mixed protective layer: spraying a loess cement slurry mixture on the finished loess slope to construct the first loess mixed protective layer; the cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:7:3, and the mixed slurry is laid on the surface of the loess slope from top to bottom; in the present invention, the purpose of adding cement to the first loess mixed protective layer is to improve the viscosity and self-supporting power of the loess, reduce the surface tension, and allow the self-supporting power to have a certain change, for example, when it is reduced from 80KN to 40KN, the self-supporting power will be naturally released without affecting the surface layer.

[0082] Step (3) constructing soil nail holes and anchor holes: according to the specifications of the fiber mesh used, drill soil nail holes and anchor holes for fixing anchor plates arranged transversely along the first loess mixed protective layer on the first loess mixed protective layer, insert soil nails into the soil nail holes, and inject loess cement slurry mixture 2 into the soil nail holes; insert anchor rods into the anchor holes, and inject loess cement slurry mixture 2 into the anchor holes; in the present invention, the loess cement slurry mixture 2 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 3:7:3. The purpose of adding cement to this loess cement slurry mixture 2 is to form a concrete-like structure, which is convenient for fixing soil nails and anchor rods. When drilling, the soil nail holes and anchor holes can be straight holes along a certain axis or spiral holes along a certain axis.

[0083] Step (4) laying a flexible anti-seepage layer: laying a waterproof and fireproof geotextile on the first loess mixed protective layer and making the soil nails penetrate the waterproof and fireproof geotextile;

[0084] Step (5) laying the fiber grid: spray a uniform layer of loess cement slurry mixture three on the waterproof and fireproof geotextile, level it to form a mixed bonding layer, bond the lower positioning plate and the lower damping rubber layer to form a lower positioning component, the lower positioning component is fixed along the soil nails and anchor rods, and then lay the fiber mesh unit on the mixed bonding layer, the connection of the two fiber mesh units is overlapped, and the overlapping position is located above the lower positioning component, the upper fixing component is fixed above the lower positioning component by the soil nails and anchor rods, the anchor rods are locked by anchors, and the soil nails are bent and fixed above the upper fixing component; the loess cement slurry mixture three is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:5:2, and the mixed slurry is laid on the surface of the flexible anti-seepage layer from top to bottom;

[0085] Step (6) constructing a second loess mixed protective layer: spraying loess cement slurry mixture four on the fiber grid is used to construct the second loess mixed protective layer; the loess cement slurry mixture four is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:4:1.5, and the mixed slurry is laid on the fiber grid surface from top to bottom; the second loess mixed protective layer, the purpose of adding cement is to improve the viscosity and self-supporting power of the loess. In this layer, the viscosity plays a greater role, so that when the surface layer releases its self-supporting power, the second layer can play a compensating role.

[0086] Step (7) constructing the third loess mixed protective layer: spraying loess cement slurry mixture 5 on the fiber grid to construct the third loess mixed protective layer; the loess cement slurry mixture 5 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:8:3.5, and the mixed slurry is laid on the surface of the third loess mixed protective layer from top to bottom. The purpose of adding cement to the third loess mixed protective layer is to improve the viscosity and self-sustaining power of the loess, so that the self-sustaining power will not decrease after encountering water, while maintaining the basic form of the loess.

[0087] Step (8) arranging the lattice beams: vertically arranging the lattice beam reinforcement cages on the third loess mixed protective layer, supporting the formwork on the lattice beam reinforcement cages and pouring the loess cement slurry mixture 2 to form the lattice beams.

[0088] Example 3

[0089] The present invention also provides a construction method for a flexible surface support structure system for loess areas, comprising the following steps:

[0090] Step (1) tidying up the loess slope: leveling the loess slope so that the loess slope is roughly inclined along the slope surface, and then measuring and planning the specifications of the fiber mesh used therein;

[0091] Step (2) constructing a first loess mixed protective layer: spraying a loess cement slurry mixture on the finished loess slope to construct the first loess mixed protective layer; the cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:8:3.5, and the mixed slurry is laid on the surface of the loess slope from top to bottom; in the present invention, the purpose of adding cement to the first loess mixed protective layer is to improve the viscosity and self-supporting power of the loess, reduce the surface tension, and allow the self-supporting power to have a certain change, for example, when it is reduced from 80KN to 40KN, the self-supporting power will be naturally released without affecting the surface layer.

[0092] Step (3) constructing soil nail holes and anchor holes: according to the specifications of the fiber mesh used, drill soil nail holes and anchor holes for fixing anchor plates arranged transversely along the first loess mixed protective layer on the first loess mixed protective layer, insert soil nails into the soil nail holes, and inject loess cement slurry mixture 2 into the soil nail holes; insert anchor rods into the anchor holes, and inject loess cement slurry mixture 2 into the anchor holes; in the present invention, the loess cement slurry mixture 2 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 3:8:3.5. The purpose of adding cement to this loess cement slurry mixture 2 is to form a concrete-like structure, which is convenient for fixing soil nails and anchor rods. When drilling, the soil nail holes and anchor holes can be straight holes along a certain axis or spiral holes along a certain axis.

[0093] Step (4) laying a flexible anti-seepage layer: laying a waterproof and fireproof geotextile on the first loess mixed protective layer and making the soil nails penetrate the waterproof and fireproof geotextile;

[0094] Step (5) laying the fiber grid: spray a uniform layer of loess cement slurry mixture three on the waterproof and fireproof geotextile, level it to form a mixed bonding layer, bond the lower positioning plate and the lower damping rubber layer to form a lower positioning component, the lower positioning component is fixed along the soil nails and anchor rods, and then lay the fiber mesh unit on the mixed bonding layer, the connection of the two fiber mesh units is overlapped, and the overlapping position is located above the lower positioning component, the upper fixing component is fixed above the lower positioning component by the soil nails and anchor rods, the anchor rods are locked by anchors, and the soil nails are bent and fixed above the upper fixing component; the loess cement slurry mixture three is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:5:1.5, and the mixed slurry is laid on the surface of the flexible anti-seepage layer from top to bottom;

[0095] Step (6) constructing a second loess mixed protective layer: spraying loess cement slurry mixture four on the fiber grid is used to construct a second loess mixed protective layer; the loess cement slurry mixture four is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:4:1.8, and the mixed slurry is laid on the surface of the fiber grid from top to bottom; the second loess mixed protective layer, the purpose of adding cement is to improve the viscosity and self-supporting power of the loess. In this layer, the viscosity plays a greater role, so that when the surface layer releases its self-supporting power, the second layer can play a compensating role.

[0096] Step (7) constructing the third loess mixed protective layer: spraying loess cement slurry mixture 5 on the fiber grid to construct the third loess mixed protective layer; the loess cement slurry mixture 5 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:9:4, and the mixed slurry is laid on the surface of the third loess mixed protective layer from top to bottom. The purpose of adding cement to the third loess mixed protective layer is to improve the viscosity and self-sustaining power of the loess, so that the self-sustaining power will not decrease after encountering water, while maintaining the basic form of the loess.

[0097] Step (8) arranging the lattice beams: vertically arranging the lattice beam reinforcement cages on the third loess mixed protective layer, supporting the formwork on the lattice beam reinforcement cages and pouring the loess cement slurry mixture 2 to form the lattice beams.

[0098] In Examples 1-3, loess cement slurry is a nearly colloidal substance formed by mixing loess and clean water with an appropriate amount of cement. It has similar properties to concrete and can be cast into various shapes as needed. The solid formed after solidification has high strength and can meet the requirements of slope protection and erosion prevention.

[0099] In the present invention, the fiber grid is made of carbon fiber or glass weaving, and has a certain flexibility, so that the protective surface can form a flexible base surface, which can be laid out according to the shape of the slope, without the need to strictly arrange the broken surface, thus saving the process time.

[0100] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A construction method for a flexible surface support structure system for loess areas, characterized in that: The steps include: Step (1) tidying up the loess slope: leveling the loess slope so that it is roughly inclined along the slope surface, and then measuring and planning the specifications of the fiber mesh used; Step (2) constructing a first loess mixed protective layer: spraying a loess-cement slurry mixture on the prepared loess slope to construct the first loess mixed protective layer; Step (3) constructing soil nail holes and anchor holes: according to the specifications of the fiber mesh used, drilling soil nail holes and anchor holes for fixing anchor plates and arranged transversely along the first loess mixed protective layer, inserting soil nails into the soil nail holes, and injecting loess cement slurry mixture II into the soil nail holes; inserting anchor rods into the anchor holes, and injecting loess cement slurry mixture II into the anchor holes; Step (4) laying a flexible anti-seepage layer: laying a flexible anti-seepage layer on the first loess mixed protective layer and making the soil nails pass through the flexible anti-seepage layer; Step (5) laying the fiber mesh: spraying a uniform layer of loess cement slurry mixture three on the flexible anti-seepage layer, leveling it to form a mixed bonding layer, bonding the lower positioning plate and the lower damping rubber layer to form a lower positioning assembly, the lower positioning assembly is fixed along the soil nails and anchor rods, and then laying the fiber mesh unit on the mixed bonding layer, the connection between the two fiber mesh units is overlapped, and the overlapping position is located above the lower positioning assembly, the upper fixing assembly is fixed above the lower positioning assembly by passing through the soil nails and anchor rods, the anchor rods are locked by anchors, and the soil nails are bent and fixed above the upper fixing assembly; Step (6) constructing a second loess mixed protective layer: spraying a loess-cement slurry mixture on the fiber grid to construct the second loess mixed protective layer; Step (7) constructing a third loess mixed protective layer: spraying a loess-cement slurry mixture 5 on the fiber grid to construct the third loess mixed protective layer; Step (8) arranging the lattice beams: vertically arranging the lattice beam reinforcement cages on the third loess mixed protective layer, supporting the formwork on the lattice beam reinforcement cages and pouring the loess cement slurry mixture to form the lattice beams.

2. The construction method according to claim 1, characterized in that: In step (2), the cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:6-8:2-5, and the mixed slurry is laid on the surface of the loess slope from top to bottom; The loess cement slurry mixture three is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:4-5:1-3, and the mixed slurry is laid on the surface of the flexible anti-seepage layer from top to bottom; The loess cement slurry mixture 4 is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:3 to 4:1 to 3, and the mixed slurry is laid on the surface of the fiber grid from top to bottom; The loess cement slurry mixture five is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:7 to 9:3 to 5, and the mixed slurry is laid on the surface of the third loess mixed protective layer from top to bottom.

3. The construction method according to claim 1, characterized in that: In step (3), the second loess cement slurry mixture is a loess slurry mixture formed by cement, loess and water in a mass ratio of 3:6-8:2.5-4.

4. A flexible surface layer support structure system for loess areas, formed by using the construction method of the flexible surface layer support structure system for loess areas according to any one of claims 1 to 3, characterized in that: include Constructing a first loess mixed protective layer on the loess slope, the first loess mixed protective layer is used to improve the viscosity of the loess and the self-supporting capacity of the loess slope; A flexible anti-seepage layer is laid on the first loess mixed protective layer. a mixed bonding layer for bonding arranged on the flexible anti-seepage layer, A fiber mesh is provided on the mixed bonding layer, wherein the fiber mesh is used to enhance the support strength of the flexible anti-seepage layer. A plurality of anchoring plates are provided and evenly arranged on the fiber grid, and are used for comprehensive fixing of the fiber grid and the flexible anti-seepage layer. A lattice beam is arranged at the upper end of the fiber grid.

5. The flexible surface support structure system for loess areas according to claim 4 is characterized in that: The flexible anti-seepage layer is made of anti-seepage and fireproof geotextile.

6. The flexible surface support structure system for loess areas according to claim 4 is characterized in that: The fiber mesh is composed of a plurality of spliced ​​fiber mesh units woven from one of glass fiber and carbon fiber, and the anchoring plate is arranged at the overlapping positions of the fiber mesh units.

7. The flexible surface support structure system for loess areas according to claim 4 is characterized in that: The anchor plate includes a lower positioning component and an upper fixing component with the same upper and lower specifications. The lower positioning assembly comprises a lower positioning plate and a lower damping rubber layer arranged on the lower positioning plate. The upper fixing assembly includes an upper fixing plate and an upper damping rubber layer arranged below the upper fixing plate. The fiber grid is fixed between the lower damping rubber layer and the upper damping rubber layer, The anchor plate is provided with an anchor hole in the middle and an inclined hole in the circumference of the anchor hole, wherein the inclined hole is inclined outward by 30 to 45 degrees based on the aperture axis of the anchor hole; The soil nails pass through the inclined holes and pass through the mixed bonding layer, the flexible anti-seepage layer and the first loess mixed protective layer and are fixed in the loess slope.

8. The flexible surface support structure system for loess areas according to claim 7 is characterized in that: An anchor rod is arranged in the anchor hole, one end of which passes through the mixed bonding layer, the flexible anti-seepage layer and the first loess mixed protective layer in sequence and is fixed in the loess slope, and the other end of the anchor rod passes through the anchor plate and is locked by an anchor fixed above the anchor plate.

9. The flexible surface support structure system for loess areas according to claim 4 is characterized in that: The lattice beam is a slope support beam made of loess cement slurry.

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