A loess cement slurry slope protection surface and construction method and application thereof

Abstract

The present invention provides a loess cement slurry protective slope surface and a construction method and application thereof, wherein a loess cement slurry protective slope surface is provided with at least one row of micro pile groups extending into the interior of the slope protection body in the transverse direction of the slope protection body, a plurality of anchor rods extending into the interior of the slope protection body are provided on the fixed surface along the peripheral side of the micro pile unit, a flexible anti-seepage layer is provided on the surface of the slope protection body, a mixed bonding layer for bonding provided on the flexible anti-seepage layer, a fiber grid provided on the mixed bonding layer, the fiber grid is used to enhance the support strength of the flexible anti-seepage layer, a first loess mixed protective layer is provided at the upper end of the fiber grid, a second loess mixed protective layer is provided on the first loess mixed protective layer, and a lattice beam is provided on the second loess mixed protective layer. The present invention also discloses a construction method and application thereof for the loess cement slurry protective slope surface.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection, in particular to a slope protection technology in a loess area, specifically to a loess cement slurry protection slope surface and a construction method and application 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 purpose of the present invention is to provide a loess cement slurry slope protection surface and a construction method and application to solve the problems raised in the above background technology.

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

[0007] A loess cement slurry slope protection surface, comprising

[0008] At least one row of micro piles extending into the interior of the slope protection body is arranged in the transverse direction of the slope protection body.

[0009] The micro pile group is composed of a plurality of micro pile units arranged in an up-and-down staggered manner.

[0010] The top surface of each micropile unit is formed by a circular steel plate to form a fixed surface.

[0011] A plurality of anchor rods extending into the slope protection body are arranged on the fixing surface along the circumference of the micro pile unit, and the anchor rods are inclined outwardly by 30 to 45 degrees with respect to the aperture axis of the micro pile unit.

[0012] A flexible anti-seepage layer is arranged on the surface of the slope protection body.

[0013] a mixed bonding layer for bonding arranged on the flexible anti-seepage layer,

[0014] 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.

[0015] A first loess mixed protective layer is arranged on the upper end of the fiber grid.

[0016] A second loess mixed protective layer is provided on the first loess mixed protective layer,

[0017] Lattice beams are arranged on the second loess mixed protective layer.

[0018] Preferably, the micro pile group is composed of a plurality of micro pile units forming a V-shaped structure and an inverted V-shaped structure, and the V-shaped structure and the inverted V-shaped structure are arranged at intervals, so that the micro pile group forms an up-and-down staggered structure.

[0019] Preferably, the V-shaped structure and the inverted V-shaped structure are arranged to include:

[0020] Three rows of micro piles are arranged along the transverse axis 2 of the slope protection body.

[0021] And the three rows of micro piles are evenly arranged along axis 1 and axis 3.

[0022] Each row of micropile groups includes a plurality of micropile units arranged transversely.

[0023] The micropile units arranged transversely along axis 2 are connected by I-beams.

[0024] The micropile units arranged along axis 1 are connected by I-beams.

[0025] The micropile units arranged along axis 3 are connected by I-beams.

[0026] And the three micropile units between adjacent axes 2 form a triangle with I-beams.

[0027] Preferably, the micro pile unit includes a grouting hole, a waterproof geotextile layer arranged along the inner side of the grouting hole, a fiber grid arranged along the inner side of the waterproof geotextile layer, and a support column cast with loess cement slurry arranged in the fiber grid.

[0028] Preferably, the flexible anti-seepage layer is made of anti-seepage and fireproof geotextile.

[0029] Preferably, the fiber grid is a plurality of spliced ​​fiber meshes woven from one of glass fiber and carbon fiber.

[0030] Preferably, the circular steel plate is provided with a first circular hole matching the installation of the micro pile unit and a second oblique hole provided on the circumference of the first circular hole for the installation of the anchor rod.

[0031] Preferably, at least two sections of glass fiber reinforced polypropylene pipe buckles are provided on the outer side of the anchor rod.

[0032] The present invention also provides a construction method for loess cement slurry slope protection, comprising:

[0033] Step 1) Drilling:

[0034] Drill straight holes in the same horizontal direction along the upper end of the slope protection body. The straight holes are arranged as follows:

[0035] Three rows of drilling groups are arranged along the transverse axis 2 of the slope protection body.

[0036] The three rows of drilling groups are evenly arranged along axis 1 and axis 3.

[0037] Each row of drilling groups includes a plurality of drilling units arranged transversely;

[0038] Each drill hole is provided with three first inclined holes in the circumference.

[0039] Step 2) Constructing micro pile groups:

[0040] A waterproof geotextile layer is arranged along the inner side of the borehole, a fiber grid is arranged along the inner side of the waterproof geotextile layer, and a support column is casted with loess cement slurry arranged in the fiber grid. During casting, a section is reserved in the borehole without casting, and an I-beam connector for connecting micropile units is precast on the support column;

[0041] Step 3) Configure the I-beams to connect the micropile units and follow the following rules:

[0042] The micropile units arranged transversely along axis 2 are connected by I-beams.

[0043] The micropile units arranged along axis 1 are connected by I-beams.

[0044] The micropile units arranged along axis 3 are connected by I-beams.

[0045] And the three micropile units between the adjacent axes 2 are formed into a triangle by I-beams;

[0046] Step 4) Construct the fixed surface:

[0047] Place the circular steel plate on the upper end of the support column, with the first circular hole corresponding to the drilled hole, and the first inclined hole corresponding to the second inclined hole.

[0048] Continue pouring loess cement slurry into the reserved section in the borehole and penetrate the circular steel plate.

[0049] Step 5) Insert the anchor rod:

[0050] At least two sections of glass fiber reinforced polypropylene pipe buckles are provided through the first inclined hole to the lower part of the second inclined hole.

[0051] Specifically, insert a glass fiber reinforced polypropylene pipe buckle from the first inclined hole to the bottom of the second inclined hole, then insert an anchor rod from the first inclined hole to the inside of the second inclined hole, inject loess cement slurry along the anchor rod through the first inclined hole to the inside of the second inclined hole, and when pouring to the middle position, inject loess cement slurry along the glass fiber reinforced polypropylene pipe buckle from the first inclined hole to the second inclined hole along the anchor rod, and inject loess cement slurry along the anchor rod through the first inclined hole to the inside of the second inclined hole until it is level with the first inclined hole, and the anchor rod at the upper end of the first inclined hole is locked by a lock;

[0052] Step 6) construct the fixed surface,

[0053] Pour loess cement slurry along the circular steel plate to form a fixed surface;

[0054] Step 7) a flexible anti-seepage layer is provided on the surface of the slope protection body;

[0055] Step 8) a mixed bonding layer for bonding provided on the flexible anti-seepage layer, and a fiber mesh provided on the mixed bonding layer, wherein the fiber mesh is used to enhance the support strength of the flexible anti-seepage layer,

[0056] Step 9) a first loess mixed protective layer is provided on the upper end of the fiber grid,

[0057] Step 10) providing a second loess mixed protective layer on the first loess mixed protective layer,

[0058] Step 11) arranging lattice beams on the second loess mixed protective layer.

[0059] The present invention also provides an application, including the loess cement slurry protective slope surface described above, and the application is used for slope protection in loess areas.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] 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.

[0062] 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.

[0063] In the present invention, the purpose of constructing the micro pile group is to release the shear force of the slope. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic diagram of the structure of the present invention;

[0065] Figure 2 It is a schematic diagram of the arrangement of the micro pile group in the present invention;

[0066] Figure 3 It is a structural diagram of a micro pile unit in the present invention;

[0067] Figure 4 It is a structural diagram of the fixed surface in the present invention;

[0068] Figure 5 It is a top view of the micro pile unit in the present invention. DETAILED DESCRIPTION

[0069] The present invention is described in detail below with reference to the accompanying drawings.

[0070] Reference Figures 1 to 5 The present invention provides a loess cement slurry slope protection surface, comprising

[0071] At least one row of micro pile groups extending into the slope protection body is arranged in the transverse direction of the slope protection body 1. In the above, the purpose of constructing the micro pile group is to release the shear force of the slope.

[0072] The micro pile group is composed of a plurality of micro pile units arranged in an up-and-down staggered manner.

[0073] The top surface of each micropile unit is formed by a circular steel plate to form a fixed surface 5.

[0074] A plurality of anchor rods 21 extending into the slope protection body are arranged on the fixing surface 5 along the circumference of the micro pile unit. The anchor rods 21 are inclined outwardly by 30 to 45 degrees with respect to the axis of the micro pile unit.

[0075] A flexible anti-seepage layer 100 is provided on the surface of the slope protection body 1.

[0076] A mixed bonding layer for bonding provided on the flexible anti-seepage layer 100,

[0077] The fiber grid 103 is arranged on the mixed bonding layer, and the fiber grid is used to enhance the support strength of the flexible anti-seepage layer. The protective structure of geotextile + fiber grid is replaced by geotextile + reinforced concrete, which is economical, simple to make, and has a wide range of raw materials that can be obtained locally.

[0078] A first loess mixed protective layer 101 is arranged on the upper end of the fiber grid.

[0079] A second loess mixed protective layer 102 is provided on the first loess mixed protective layer.

[0080] Lattice beams are arranged on the second loess mixed protective layer.

[0081] In the above, the purpose of adding cement in the first loess mixed protective layer is to improve the viscosity and self-supporting capacity of the loess, reduce the surface tension, and allow the self-supporting capacity to change to a certain extent. For example, when it is reduced from 80KN to 40KN, the self-supporting capacity will be naturally released without affecting the surface layer.

[0082] In the above, the second loess mixed protective layer, the purpose of adding cement is to improve the viscosity and self-supporting capacity of the loess. In this layer, the viscosity plays a greater role, so that when the surface layer releases its self-supporting capacity, the second layer can play a compensating role.

[0083] In the above, the micro pile group is composed of a plurality of micro pile units forming a V-shaped structure and an inverted V-shaped structure, and the V-shaped structure and the inverted V-shaped structure are arranged at intervals, so that the micro pile group forms an up-and-down staggered structure.

[0084] In the above, the V-shaped structure and the inverted V-shaped structure are arranged to include:

[0085] Three rows of micro piles are arranged along the transverse axis 2 of the slope protection body.

[0086] It includes a first row of micro pile groups 2, a second row of micro pile groups 3 and a third row of micro pile groups 4.

[0087] The micropile units constituting the first row of micropile groups 2, the second row of micropile groups 3 and the third row of micropile groups 4 are evenly arranged along the axis 1 and the axis 3.

[0088] The micropile units arranged transversely along the axis 2 are connected by I-beams 5.

[0089] The micropile units arranged along axis 1 are connected by I-beams.

[0090] The micropile units arranged along axis 3 are connected by I-beams.

[0091] And the three micropile units between adjacent axes 2 form a triangle with I-beams.

[0092] In the above, the micro pile unit includes a grouting hole, a waterproof geotextile layer 24 arranged along the inner side of the grouting hole, a fiber grid 23 arranged along the inner side of the waterproof geotextile layer 24, and a support column 20 cast with loess cement slurry arranged in the fiber grid 23. In the present invention, the waterproof geotextile layer 24 and the fiber grid 23 are used to replace the steel cage, which is conducive to the layout of the micro pile unit in the loess region.

[0093] In the above, the flexible anti-seepage layer 24 is made of anti-seepage and fireproof geotextile.

[0094] Preferably, the fiber grid 23 is a plurality of spliced ​​fiber grids woven from one of glass fiber and carbon fiber.

[0095] In the above, the circular steel plate is provided with a first circular hole matching the installation of the micro pile unit and a second oblique hole provided on the circumference of the first circular hole for the installation of the anchor rod 21 .

[0096] In the above, at least two sections of glass fiber reinforced polypropylene pipe buckles 25 are arranged on the outside of the anchor rod 21. In the above, when the anchor rod is lowered, at least two sections of glass fiber reinforced polypropylene pipe buckles 25 are arranged on the outside of the anchor rod, so that the anchor rod is fixed more stably inside the slope protection body.

[0097] The present invention also provides an application, including the loess cement slurry protective slope surface described above, and the application is used for slope protection in loess areas.

[0098] In the above, 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 erosion prevention.

[0099] In the above, the fiber mesh 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. There is no need to strictly organize the broken surface, which saves the process time.

[0100] The above can be applied to slope protection in trenchless areas, especially to slope protection in loess areas. In the slope protection in loess areas, holes are directly drilled without building support members or using concrete pouring, and loess cement slurry is directly used for pouring.

[0101] Example 1

[0102] The invention provides a construction method for loess cement slurry slope protection, comprising:

[0103] Step 1) Drilling:

[0104] Drill straight holes in the same horizontal direction along the upper end of the slope protection body. The straight holes are arranged as follows:

[0105] Three rows of drilling groups are arranged along the transverse axis 2 of the slope protection body.

[0106] The three rows of drilling groups are evenly arranged along axis 1 and axis 3.

[0107] Each row of drilling groups includes a plurality of drilling units arranged transversely;

[0108] Each drill hole is provided with three first inclined holes in the circumference.

[0109] Step 2) Constructing micro pile groups:

[0110] A waterproof geotextile layer is arranged along the inner side of the borehole, a fiber grid is arranged along the inner side of the waterproof geotextile layer, and a support column is casted with loess cement slurry arranged in the fiber grid. During casting, a section is reserved in the borehole without casting, and an I-beam connector for connecting micropile units is precast on the support column;

[0111] Step 3) Configure the I-beams to connect the micropile units and follow the following rules:

[0112] The micropile units arranged transversely along axis 2 are connected by I-beams.

[0113] The micropile units arranged along axis 1 are connected by I-beams.

[0114] The micropile units arranged along axis 3 are connected by I-beams.

[0115] And the three micropile units between the adjacent axes 2 are formed into a triangle by I-beams;

[0116] Step 4) Construct the fixed surface:

[0117] Place the circular steel plate on the upper end of the support column, with the first circular hole corresponding to the drilled hole, and the first inclined hole corresponding to the second inclined hole.

[0118] Continue pouring loess cement slurry into the reserved section in the borehole and penetrate the circular steel plate.

[0119] Step 5) Insert the anchor rod:

[0120] At least two sections of glass fiber reinforced polypropylene pipe buckles are provided through the first inclined hole to the lower part of the second inclined hole.

[0121] Specifically, insert a glass fiber reinforced polypropylene pipe buckle from the first inclined hole to the bottom of the second inclined hole, then insert an anchor rod from the first inclined hole to the inside of the second inclined hole, inject loess cement slurry along the anchor rod through the first inclined hole to the inside of the second inclined hole, and when pouring to the middle position, inject loess cement slurry along the glass fiber reinforced polypropylene pipe buckle from the first inclined hole to the second inclined hole along the anchor rod, and inject loess cement slurry along the anchor rod through the first inclined hole to the inside of the second inclined hole until it is level with the first inclined hole, and the anchor rod at the upper end of the first inclined hole is locked by a lock;

[0122] Step 6) construct the fixed surface,

[0123] Pour loess cement slurry along the circular steel plate to form a fixed surface;

[0124] Step 7) a flexible anti-seepage layer is provided on the surface of the slope protection body;

[0125] Step 8) a mixed bonding layer for bonding provided on the flexible anti-seepage layer, and a fiber mesh provided on the mixed bonding layer, wherein the fiber mesh is used to enhance the support strength of the flexible anti-seepage layer,

[0126] Step 9) a first loess mixed protective layer is provided on the upper end of the fiber grid,

[0127] Step 10) providing a first loess mixed protective layer on the first loess mixed protective layer,

[0128] Step 11) arranging lattice beams on the second loess mixed protective layer.

[0129] The first loess mixed protective layer 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;

[0130] The second loess mixed protective layer is a loess slurry mixture formed by cement, loess and water in a mass ratio of 1:7-9:3-5, and the mixed slurry is laid on the surface of the first loess mixed protective layer from top to bottom.

[0131] In this embodiment, the construction of the micro pile group meets the following conditions:

[0132] The micro pile group is composed of a plurality of micro pile units forming a V-shaped structure and an inverted V-shaped structure, and the V-shaped structure and the inverted V-shaped structure are arranged at intervals, so that the micro pile group forms an up-and-down staggered structure.

[0133] In the above, the V-shaped structure and the inverted V-shaped structure are arranged to include:

[0134] Three rows of micro piles are arranged along the transverse axis 2 of the slope protection body.

[0135] And the three rows of micro piles are evenly arranged along axis 1 and axis 3.

[0136] Each row of micropile groups includes a plurality of micropile units arranged transversely.

[0137] The micropile units arranged transversely along axis 2 are connected by I-beams.

[0138] The micropile units arranged along axis 1 are connected by I-beams.

[0139] The micropile units arranged along axis 3 are connected by I-beams.

[0140] And the three micro pile units along the parallel axis 2 form a triangle by I-beams.

[0141] In the present invention, I-beams are used to connect the micropile units, so that the micropile units arranged at the bottom support the micropile units arranged at the top, and by utilizing the stability of the triangle, the three micropile units along the parallel axis 2 are formed into a triangle by I-beams, so that the micropile units forming the triangle have higher stability.

[0142] 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 loess cement slurry slope protection, characterized in that: include: Step 1) Drilling: Drill straight holes in the same horizontal direction along the upper end of the slope protection body. The straight holes are arranged as follows: Three rows of drilling groups are arranged along the transverse axis 2 of the slope protection body. The three rows of drilling groups are evenly arranged along axis 1 and axis 3. Each row of drilling groups includes a plurality of drilling units arranged transversely; Each drill hole is provided with three first inclined holes in the circumference. Step 2) Constructing micro pile groups: A waterproof geotextile layer is arranged along the inner side of the borehole, a fiber grid is arranged along the inner side of the waterproof geotextile layer, and a support column is casted with loess cement slurry arranged in the fiber grid. During casting, a section is reserved in the borehole without casting, and an I-beam connector for connecting micropile units is precast on the support column; Step 3) Configure the I-beams to connect the micropile units and follow the following rules: The micropile units arranged transversely along axis 2 are connected by I-beams. The micropile units arranged along axis 1 are connected by I-beams. The micropile units arranged along axis 3 are connected by I-beams. And the three micropile units between the adjacent axes 2 are formed into a triangle by I-beams; Step 4) Construct the fixed surface: Place the circular steel plate on the upper end of the support column, with the first circular hole corresponding to the drilled hole, and the first oblique hole corresponding to the second oblique hole. Continue pouring loess cement slurry into the reserved section in the borehole and penetrate the circular steel plate. Step 5) Insert the anchor rod: At least two sections of glass fiber reinforced polypropylene pipe buckles are provided through the first inclined hole to the lower part of the second inclined hole. Specifically, insert a glass fiber reinforced polypropylene pipe buckle from the first inclined hole to the bottom of the second inclined hole, then insert an anchor rod from the first inclined hole to the inside of the second inclined hole, inject loess cement slurry along the anchor rod through the first inclined hole to the inside of the second inclined hole, and when pouring to the middle position, inject loess cement slurry along the glass fiber reinforced polypropylene pipe buckle from the first inclined hole to the second inclined hole along the anchor rod, and inject loess cement slurry along the anchor rod through the first inclined hole to the inside of the second inclined hole until it is level with the first inclined hole, and the anchor rod at the upper end of the first inclined hole is locked by a lock; Step 6) Build the fixed surface, Pour loess cement slurry along the circular steel plate to form a fixed surface; Step 7) a flexible anti-seepage layer is provided on the surface of the slope protection body; Step 8) a mixed bonding layer for bonding is provided on the flexible anti-seepage layer, and 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. Step 9) a first loess mixed protective layer is provided on the upper end of the fiber grid, Step 10) providing a second loess mixed protective layer on the first loess mixed protective layer, Step 11) Arrange lattice beams on the second loess mixed protective layer.

2. The loess cement slurry protective slope surface obtained by the construction method of the loess cement slurry protective slope surface according to claim 1 is characterized in that: include: At least one row of micro piles extending into the interior of the slope protection body is arranged in the transverse direction of the slope protection body. The micro pile group is composed of a plurality of micro pile units arranged in an up-and-down staggered manner. The top surface of each micropile unit is formed by a circular steel plate to form a fixed surface. A plurality of anchor rods extending into the slope protection body are arranged on the fixing surface along the peripheral side of the micro pile unit. The anchor rods are inclined outward by 30 to 45 degrees based on the aperture axis of the micro pile unit. A flexible anti-seepage layer is arranged on the surface of the slope protection body. 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 first loess mixed protective layer is arranged on the upper end of the fiber grid. A second loess mixed protective layer is provided on the first loess mixed protective layer, Lattice beams are arranged on the second loess mixed protective layer.

3. The loess cement slurry slope protection according to claim 2 is characterized in that: The micro pile group is composed of a plurality of micro pile units forming a V-shaped structure and an inverted V-shaped structure, and the V-shaped structure and the inverted V-shaped structure are arranged at intervals, so that the micro pile group forms an up-and-down staggered structure.

4. The loess cement slurry slope protection according to claim 3 is characterized in that: The V-shaped structure and the inverted V-shaped structure arrangement include: Three rows of micro piles are arranged along the transverse axis 2 of the slope protection body. And the three rows of micro piles are evenly arranged along axis 1 and axis 3. Each row of micropile groups includes a plurality of micropile units arranged transversely. The micropile units arranged transversely along axis 2 are connected by I-beams. The micropile units arranged along axis 1 are connected by I-beams. The micropile units arranged along axis 3 are connected by I-beams. And the three micropile units between the adjacent axes 2 form a triangle by I-beams.

5. The loess cement slurry slope protection according to claim 2, 3 or 4, characterized in that: The micro pile unit comprises a grouting hole, a waterproof geotextile layer arranged along the inner side of the grouting hole, a fiber grid arranged along the inner side of the waterproof geotextile layer, and a support column cast with loess cement slurry arranged in the fiber grid.

6. The loess cement slurry slope protection according to claim 2 is characterized in that: The flexible anti-seepage layer is made of anti-seepage and fireproof geotextile.

7. The loess cement slurry slope protection according to claim 2 is characterized in that: The fiber grid is a plurality of spliced ​​fiber meshes woven from one of glass fibers and carbon fibers.

8. The loess cement slurry slope protection according to claim 2 is characterized in that: The circular steel plate is provided with a first circular hole matching the installation of the micro pile unit and a second oblique hole provided on the circumference of the first circular hole for installing the anchor rod.

9. The loess cement slurry slope protection according to claim 2, characterized in that: At least two sections of glass fiber reinforced polypropylene pipe buckles are arranged on the outer side of the anchor rod.

10. An application, comprising the loess cement slurry slope protection described in any one of claims 2 to 9, wherein the application is used for slope protection in loess areas.

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