Slope support system and construction method

Abstract

The present invention discloses a slope support system and a construction method. The slope support system includes: a slope base; a retaining wall, which is arranged on the slope surface of the slope base and has a microbial solidification layer formed on the outside; an anchor assembly, one end of which passes through the retaining wall and is embedded in the slope base, and the other end partially protrudes from the microbial solidification layer; a wire mesh, which is spaced apart from the microbial solidification layer and welded to the end of the anchor assembly protruding from the microbial solidification layer; a vegetation substrate layer, which is laid on the outer surface of the microbial solidification layer and covers the wire mesh. One end of the anchor assembly of the present invention passes through the retaining wall and is embedded in the slope base, and the other end protrudes from the microbial solidification layer and is welded to the wire mesh to form a strong anchoring system, further enhancing the stability of the slope. The wire mesh is welded to the end of the anchor assembly to form a layer of reinforcement protection, and the wire mesh is spaced apart from the microbial solidification layer and embedded in the middle of the vegetation substrate layer, which can effectively solidify the vegetation substrate layer and make it less prone to landslide.

Description

Technical Field

[0001] The present invention relates to the technical field of slope support, and in particular to a slope support system and a construction method. Background Art

[0002] Soft rock geology is a complex and challenging subject in highway construction. Soft rock, especially the type rich in clay minerals, is easily affected by atmospheric dry-wet cycles after excavation, leading to weathering and disintegration. Slopes in such geological conditions are prone to disasters such as collapse, landslides and collapses without proper protection measures, posing a serious threat to the stability and service life of the highway.

[0003] The slope protection beside the highway also needs to consider the issue of vegetation greening. Although traditional cement grids can play a role in area division and soil solidification, this method is costly and has low construction efficiency. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a slope support system.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A slope support system comprises: a slope base; a retaining wall, which is arranged on the slope surface of the slope base and has a microbial solidification layer formed on the outside; an anchor assembly, one end of which passes through the retaining wall and is embedded in the slope base, and the other end partially protrudes from the microbial solidification layer; a steel wire mesh, which is arranged at intervals from the microbial solidification layer and is welded to the end of the anchor assembly protruding from the microbial solidification layer; a vegetation substrate layer, which is laid on the outer surface of the microbial solidification layer and covers the steel wire mesh; the retaining wall and the slope base are formed with a socket corresponding to the anchor assembly, the inner end peripheral wall of the socket is provided with an outer expansion groove, and the inner end of the anchor assembly is inserted into the socket A hook plate is provided which opens outward to an outward expansion groove, and the outward expansion groove is filled with concrete to wrap the hook plate; the anchor rod assembly includes a hollow outer rod, a first center hole is provided in the center of the hollow outer rod, and an avoidance gap is provided on the bottom peripheral wall of the hollow outer rod; the hook plate has a contracted state in which it is retracted to not protrude from the outer peripheral wall of the hollow outer rod and an open state in which it is opened to protrude from the outer peripheral wall of the hollow outer rod, and the hook plate is hinged to the side wall of the avoidance gap to achieve switching between the contracted state and the open state; a bonding plate is provided at the outer end of the hollow outer rod, and the bonding plate is bonded to the microbial solidification layer and is provided with an insertion rod.

[0007] Furthermore, the anchor rod assembly also includes a hollow inner rod; a second center hole is provided at the center of the hollow inner rod, the hollow inner rod is installed in the first center hole of the hollow outer rod and can be adjusted along the axis of the hollow outer rod and then fixed, the hollow inner rod has a first state corresponding to the hook plate in the retracted state and a second state corresponding to the hook plate in the open state, the hollow inner rod can be moved along the axis of the hollow outer rod to achieve switching between the first state and the second state, and the hollow inner rod in the first state can push the hook plate to switch from the retracted state to the open state during the movement toward the second state; the outer end of the hollow inner rod in the second state protrudes the microbial solidification layer; when the hook plate is in the open state, the avoidance gap can allow the fluid medium to pass through.

[0008] Furthermore, the outer end of the hollow inner rod is sequentially provided with a threaded shaft section and a screw shaft section facing inward, and the outer peripheral contour of the cross section of the screw shaft section is a regular polygon.

[0009] Furthermore, a first abutment surface is provided on the upper side of the avoidance notch, and a second abutment surface is provided on the lower side of the avoidance notch, and the hook plate includes a hinge tube, a contact portion and an opening portion, and the contact portion and the opening portion are both connected to the hinge tube; when in the open state, the contact portion contacts the lower end of the hollow inner rod, and the opening portion opens outward; when in the open state, the opening portion abuts against the first abutment surface; when in the contracted state, the opening portion abuts against the second abutment surface.

[0010] Furthermore, the outer diameter of the hollow outer rod is smaller than the insertion hole; and the end of the opening portion is provided with a bending portion which is folded and bent outwardly toward the hinge tube.

[0011] Furthermore, the lower end of the first center hole is provided with a threaded hole section, and the lower end of the hollow inner rod is provided with a threaded section threadedly connected to the threaded hole section.

[0012] The present invention also provides a slope support construction method, comprising the following steps: S1, excavating a slope to form a slope matrix; S2, filling the slope surface of the slope matrix to form a retaining wall; S3, forming a microbial solidification layer on the outer surface of the retaining wall; S4, inserting an anchor rod assembly on the surface of the microbial solidification layer, so that one end of the anchor rod assembly is embedded in the slope matrix and the other end partially protrudes from the microbial solidification layer; S5, laying a steel wire mesh on the outer side of the microbial solidification layer, and spacing the steel wire mesh from the microbial solidification layer, and welding the steel wire mesh to the end of the anchor rod assembly protruding from the microbial solidification layer; S6, laying a vegetation base material layer on the outer surface of the microbial solidification layer and covering the steel wire mesh.

[0013] Furthermore, step S4 specifically includes: S41, opening a socket in the retaining wall and the slope base, the socket passes through the retaining wall and extends into the slope base, and an outward expansion groove is opened on the outer periphery of the bottom of the socket; S42, inserting the anchor rod assembly into the socket; S43, adjusting the hollow inner rod to the second state, the hollow inner rod pushes the hook plate to switch from the contracted state to the open state, so that the hook plate opens outward to the outward expansion groove, at this time the outer end of the hollow inner rod protrudes the microbial solidification layer for wire mesh welding; S44, the outer end of the hollow inner rod is connected to the grouting pipeline, and concrete is injected into the hollow inner rod, and the concrete passes through the avoidance gap and fills the gap between the outward expansion groove, the socket and the hollow inner rod.

[0014] The present invention has the following beneficial effects:

[0015] By setting a retaining wall on the slope base and forming a microbial solidification layer on the outside of the retaining wall, the stability of the slope is effectively enhanced. The microbial solidification layer uses the action of microorganisms to solidify the soil, enhance the anti-erosion ability of the slope, reduce soil and water loss, and thus improve the overall stability of the slope. One end of the anchor assembly passes through the retaining wall and is embedded in the slope base, and the other end protrudes from the microbial solidification layer and is welded to the wire mesh to form a solid anchoring system, further enhancing the stability of the slope. The wire mesh is welded to the end of the anchor assembly to form a layer of reinforcement protection, and the wire mesh is spaced from the microbial solidification layer and embedded in the middle of the vegetation substrate layer, which can effectively solidify the vegetation substrate layer, making it less prone to landslides, providing stable soil for plant growth, promoting vegetation growth, and realizing the ecological restoration of the slope. The roots of the vegetation can penetrate into the vegetation substrate layer, enhancing the cohesion of the soil in the vegetation substrate layer. At the same time, the presence of vegetation also helps to improve the microenvironment of the slope, reduce water evaporation, and further enhance the stability of the slope.

[0016] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0020] Figure 3 It is a schematic diagram of the local structure in the first state of the construction process;

[0021] Figure 4It is a partial structural schematic diagram of the second state of the construction process;

[0022] Figure 5 It is a partial structural diagram of the third state of the construction process;

[0023] Figure 6 is a schematic diagram of the structure of the anchor assembly in an open state;

[0024] Figure 7 It is a partial schematic diagram of the exploded state of the anchor rod assembly;

[0025] Figure 8 It is a schematic diagram of the local structure of the hollow outer rod;

[0026] Fig. 9 It is a schematic flow diagram of the construction method of the present invention;

[0027] Fig.10 It is a partial flow diagram of the construction method of the present invention.

[0028] Legend:

[0029] Slope base 100, plug hole 110, outward expansion groove 111;

[0030] Retaining wall 200, microbial solidification layer 210;

[0031] Anchor rod assembly 300, hook plate 310, hinged tube 311, contact portion 312, opening portion 313, bending portion 314, hollow outer rod 320, first center hole 321, avoidance gap 322, first abutment surface 323, second abutment surface 324, fitting plate 325, insertion rod 326, threaded hole section 327;

[0032] Hollow inner rod 330, second center hole 331, threaded shaft section 332, screwing shaft section 333, threaded section 334;

[0033] Wire Mesh 400;

[0034] Planting substrate layer 500;

[0035] Support the infiltration ditch 600 and the drainage ditch 700. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Please refer to Figure 1 and Figure 2 A slope support system in a preferred embodiment of the present invention includes a slope base 100, a retaining wall 200, an anchor assembly 300, a wire mesh 400 and a vegetation substrate layer 500.

[0041] The slope base 100 has an inclined slope surface. The retaining wall 200 is arranged on the slope surface of the slope base 100, and a microbial solidification layer 210 is formed on the outer side of the retaining wall 200. One end of the anchor rod assembly 300 passes through the retaining wall 200 and is embedded in the slope base 100, and the other end partially protrudes from the microbial solidification layer 210; the wire mesh 400 is arranged at intervals from the microbial solidification layer 210, that is, the wire mesh 400 and the microbial solidification layer 210 have a certain distance instead of being directly laid on the microbial solidification layer 210. The wire mesh 400 is welded to the end of the anchor rod assembly 300 protruding from the microbial solidification layer 210; the vegetation substrate layer 500 is laid on the outer surface of the microbial solidification layer 210, and the vegetation substrate layer 500 covers the wire mesh 400.

[0042] The present invention provides a slope support system, which effectively enhances the stability of the slope by setting a retaining wall 200 on the slope base 100 and forming a microbial solidification layer 210 on the outside of the retaining wall 200. The microbial solidification layer 210 uses the action of microorganisms to solidify the soil, enhance the anti-erosion ability of the slope, reduce soil and water loss, and thus improve the overall stability of the slope. One end of the anchor assembly 300 passes through the retaining wall 200 and is embedded in the slope base 100, and the other end protrudes from the microbial solidification layer 210 and is welded to the wire mesh 400 to form a solid anchoring system, further enhancing the stability of the slope. The wire mesh 400 is welded to the end of the anchor assembly 300 to form a layer of reinforcement protection, and the wire mesh 400 is spaced apart from the microbial solidification layer 210 and embedded in the middle position of the vegetation substrate layer 500, which can effectively solidify the vegetation substrate layer, making it less prone to landslide, providing stable soil for plant growth, promoting vegetation growth, and realizing the ecological restoration of the slope. The roots of the vegetation can penetrate deep into the vegetation substrate layer 500, enhancing the cohesion of the soil of the vegetation substrate layer 500. At the same time, the presence of vegetation also helps to improve the microenvironment of the slope, reduce water evaporation, and further enhance the stability of the slope. Through the application of vegetation greening and microbial solidification layer, the ecological restoration of the slope is achieved, the damage to the environment is reduced, and it meets the green and environmental protection requirements of modern engineering construction.

[0043] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the retaining wall 200 and the slope base 100 are formed with a socket 110 corresponding to the anchor assembly 300, that is, the socket 110 penetrates the microbial solidification layer 210, the retaining wall 200 and extends into the slope base 100. The inner end peripheral wall of the socket 110 is provided with an outward expansion groove 111, and the outer peripheral contour of the outward expansion groove 111 is larger than the diameter of the socket 110. The inner end of the anchor assembly 300 is inserted into the socket 110 and is provided with a hook plate 310 that is opened outward to the outward expansion groove 111. The outward expansion groove 111 is filled with concrete to wrap the hook plate 310, so that the hook plate 310 and the concrete in the outward expansion groove 111 cannot fall out of the socket 110 after solidification, thereby improving the anchoring effect of the anchor assembly 300.

[0044] Reference Figure 2 and Figure 3In a further embodiment of the present invention, the anchor rod assembly 300 includes a hollow outer rod 320 and a hollow inner rod 330. The center of the hollow outer rod 320 is provided with a first center hole 321, the center of the hollow inner rod 330 is provided with a second center hole 331, and the bottom peripheral wall of the hollow outer rod 320 is provided with an avoidance notch 322. The hook plate 310 has a contracted state in which it is retracted to not protrude from the peripheral wall of the hollow outer rod 320 and an open state in which it is open to protrude from the peripheral wall of the hollow outer rod 320. The hook plate 310 is hinged to the side wall of the avoidance notch 322 to achieve switching between the contracted state and the open state. The hook plate 310 can switch between the states to avoid the hook plate 310 in the open state from being able to smoothly enter the socket 110 when inserted into the socket, thereby avoiding structural interference, thereby facilitating the hook plate 310 to smoothly enter the inner end position of the socket 110 and reducing installation resistance. The hollow inner rod 330 is installed in the first center hole 321 of the hollow outer rod 320. The hollow inner rod 330 can be adjusted along the axis of the hollow outer rod 320 and then fixed. The hollow inner rod 330 can be adjusted and fixed after being adjusted to the desired position. It will not float after being adjusted to the desired position, resulting in an unstable state. The hollow inner rod 330 has a first state corresponding to the hook plate 310 in the retracted state and a second state corresponding to the hook plate 310 in the extended state. The hollow inner rod 330 can be moved along the axis of the hollow outer rod 320 to achieve switching between the first state and the second state. Figure 4 When the hollow inner rod 330 is in the first state, the hook plate 310 can be in a retracted state, and the hollow inner rod 330 will not interfere with the retracted hook plate 310. The hollow inner rod 330 in the first state can push the hook plate 310 to switch from the retracted state to the open state during the movement toward the second state. Figure 5When the hollow inner rod 330 is in the second state, the hollow inner rod 330 just pushes the hook plate 310 to the open state. Thus, the hook plate 310 is fixed in the open state and then filled with concrete, so that the hook plate 310 is sealed in the open state. The outer end of the hollow inner rod 330 in the second state protrudes from the microbial solidification layer 210 to facilitate welding of the wire mesh 400, so that the wire mesh 400 is suspended on the microbial solidification layer 210 and fixed, so that the wire mesh 400 is in the middle position of the vegetation substrate layer 500, which can have a good fixing effect on the vegetation substrate layer 500; when the hook plate 310 is in the open state, the avoidance gap 322 can allow the fluid medium to pass through. At this time, the second center hole 331, the lower end of the first center hole 321, and the avoidance gap 322 are connected to form a grouting channel, so that after the hook plate 310 is inserted into the insertion hole 110 and opened to the outer expansion groove 111, the concrete enters from the second center hole 331 and passes through the avoidance gap 322 into the outer expansion groove 111, realizing insertion first and then grouting, which is convenient for installation, rather than grouting first and then insertion, resulting in greater resistance when inserting and switching states of the hook plate 310. It is understandable that, in order to achieve structural symmetry and multi-position limit, the hook plate 310 and the avoidance gap 322 are arranged in multiple groups along the circumferential direction. In addition, when the inner end of the hollow outer rod 320 contacts the bottom wall of the socket 110 or the outlet of the inner end of the first center hole 321 is blocked by residual soil and rocks, the avoidance gap 322 can be well provided for concrete to pass through and enter the outer expansion groove 111 from the second center hole 331 for filling. The avoidance gap 322 not only provides an installation position and installation space for the hook plate 310, so that the hook plate 310 can be retracted and not protruding, thereby facilitating smooth insertion into the socket 110, but also allows concrete to flow, so that the outer expansion groove 111 and the socket 110 can be filled to reduce the assembly gap. In the prior art, the anchor rod is directly inserted into the slope base 100, and the resistance during the insertion process is large, and the anchor rod may be deflected during the insertion process, resulting in loose contact between the anchor rod and the slope base 100, affecting the anchoring effect, while the structural design and construction of the present application effectively avoid this problem. In addition, the hollow inner rod 330 is not only a transmission structure for pushing the hook plate 310 to switch the state of the activity, but also the microbial solidification layer 210 protruding from the outer end of the hollow inner rod 330 can be used for welding the wire mesh 400, and the hollow inner rod 330 can also be used for external concrete injection to complete the concrete filling and pouring of the socket 110 and the outer expansion groove 111, eliminate the installation gap and improve the anchoring effect, so that the hollow inner rod 330 has at least three different dimensions of technical effects, achieving the effect of simplifying the structure. After the concrete is poured, the concrete will fill the bottom space of the socket 110, fill the outer expansion groove 111, and avoid the gap 322, thereby forming a concrete block that wraps the hollow outer rod 320, and the hook plate 310, the hollow outer rod 320 and the hollow inner rod 330 can be used as pre-buried metal structural parts of the concrete block, thereby improving the structural strength of the concrete.

[0045] Reference Figure 7 and Figure 8 In a further embodiment of the present invention, a first abutting surface 323 is provided on the upper side of the avoidance notch 322, a second abutting surface 324 is provided on the lower side of the avoidance notch 322, and the opening portion 313 is rotatable between the first abutting surface 323 and the second abutting surface 324. The hook plate 310 includes a hinge tube 311, a contact portion 312 and an opening portion 313, and the hinge tube 311 and the side wall of the avoidance notch 322 are provided with corresponding holes to be hinged through a hinge axis. The contact portion 312 and the opening portion 313 are both connected to the hinge tube 311; in the open state, the contact portion 312 contacts the lower end of the hollow inner rod 330, and the opening portion 313 opens outward; in the contracted state, the contact portion 312 partially extends into the first center hole 321, the contact portion 312 is in an inclined state, the contact portion 312 forms a certain angle with the axis of the hollow inner rod 330, and the contact portion 312 is on the movable path of the hollow inner rod 330 so as to be contacted and pushed by the hollow inner rod 330 moving toward the second state, and at this time, the opening portion 313 is contracted in the avoidance gap 322. When in the open state, the open portion 313 abuts against the first abutting surface 323; when in the contracted state, the open portion 313 abuts against the second abutting surface 324, so that in both states, there are abutment surfaces abutting against the limit, and in the open state, the hollow inner rod 330 abuts against the contact portion 312, so that the open portion 313 abuts against the first abutting surface 323, thereby locking and fixing the entire hook plate 310, so that the hook plate 310 and the hollow inner rod 330 and the hollow outer rod 320 are fixed as a whole, and when the hollow inner rod 330 and the hollow outer rod 320 are subjected to an outward force, they will The force is transmitted to the hook plate 310, and the hook plate 310 and the concrete block filled in the external expansion groove 111 are limited by the external expansion groove 111, so that the hook plate 310 can prevent the hollow inner rod 330 and the hollow outer rod 320 from loosening out of the insertion hole 110, thereby stabilizing the anchor rod assembly 300. If the hook plate 310 in the opened state still has the freedom of rotation, when the hollow inner rod 330 and the hollow outer rod 320 are subjected to force, the force of the hollow inner rod 330 and the hollow outer rod 320 is difficult to be transmitted to the hook plate 310, resulting in it being difficult to rely on the hook plate 310 to unload the force and lock the position.

[0046] Reference Figure 4In a further embodiment of the present invention, the outer diameter of the hollow outer rod 320 is smaller than the insertion hole 110, so that it is convenient to insert into the insertion hole 110 and reduce the resistance during insertion; the end of the opening portion 313 is provided with a curved portion 314 that is folded and bent outward toward the hinge tube 311. The curved portion 314 is bent outward, which means that when the opening portion 313 is in the contracted state, the curved portion 314 is bent in the direction away from the axis of the hollow outer rod 320, and the bending direction extends toward the hinge tube 311. Therefore, when inserting, even if the opening portion 313 is opened outward and contacts the peripheral wall of the insertion hole 110, because it is the curved portion 314 that contacts the peripheral wall of the insertion hole 110, when inserting, the force of the side wall of the insertion hole 110 will push the curved portion 314 to contract inward, so that the resistance during insertion becomes smaller. Furthermore, due to the function of the curved portion 314, the structure in contact with the peripheral wall of the insertion hole 110 is not a sharp end, but a smooth curve, which can prevent the end of the opening portion 313 from being embedded in the side wall of the insertion hole 110 during insertion, resulting in unsmooth insertion.

[0047] Reference Figure 6 In a further embodiment of the present invention, a fitting plate 325 is provided at the outer end of the hollow outer rod 320. The fitting plate 325 is fitted to the microbial curing layer 210 and is provided with an insertion rod 326. The insertion rod 326 is arranged on the fitting surface of the fitting plate 325. The insertion rod 326 can be inserted into the microbial curing layer 210 or even the retaining wall 200, so that a preliminary fixing effect is achieved during installation, and the hollow outer rod 320 is prevented from shaking greatly during grouting. The depth of the hollow outer rod 320 inserted into the socket 110 is limited to avoid inserting too deep or too shallowly. Usually, in order to avoid the socket 110 being insufficiently deep, or the residual soil residue in the socket 110 affecting the insertion depth of the anchor assembly 300, the socket 110 is dug a little deeper so that after the anchor assembly 300 is inserted, there is a certain gap between it and the bottom wall of the socket 110, such as Figure 4 As shown, the gap will be filled with concrete and will not affect the structural stability.

[0048] Reference Figure 4 In a further embodiment of the present invention, a threaded hole section 327 is provided at the lower end of the first center hole 321, and a threaded section 334 threadedly connected to the threaded hole section 327 is provided at the lower end of the hollow inner rod 330, so that the position of the hollow inner rod 330 can be adjusted through the threaded connection, and after the position is adjusted to the desired position, as long as the hollow inner rod 330 is not subjected to the torque of the external force, the position of the hollow inner rod 330 can be fixed, and the position adjustment and fixation of the hollow inner rod 330 are relatively convenient.

[0049] Reference Figure 6 In a further embodiment of the present invention, the outer end of the hollow inner rod 330 is provided with a threaded shaft section 332 and a screwing shaft section 333 in sequence, and the cross-sectional outer peripheral contour of the screwing shaft section 333 is a regular polygon, so as to facilitate screwing. The threaded shaft section 332 facilitates the connection of the grouting pipeline.

[0050] Reference Fig. 9 The present invention also provides a slope support construction method for forming a slope support system; comprising the following steps S1, S2, S3, S4, S5 and S6.

[0051] S1, excavating the slope to form a slope base 100; usually the slope is excavated according to the designed slope ratio, and the debris rock mass on the slope surface is cleared.

[0052] S2, fill the slope surface of the slope base 100 to form a retaining wall 200; utilize the soft rock debris excavated from the slope at the construction site, add 1% to 3% cement, mix the cement and soft rock debris evenly, and then fill the cement improved soil retaining wall by compaction, and the compaction degree of the retaining wall should be greater than 96%; the advantages of the cement improved retaining wall: it has the function of anti-seepage, moisture retention and support for the slope, and makes full use of the on-site slag to make a gravity retaining wall to support the slope, while the traditional gravity retaining wall requires a large amount of stone chips, and the slag needs to be transported outside for treatment, which is not conducive to ecological environment protection.

[0053] S3, forming a microbial solidification layer 210 on the outer surface of the retaining wall 200; specifically, using Bacillus spores as urea-lytic enzyme strains, CaCl solution as a binder, and a mixture of kaolin and NaOH solution as an activator, a microbial solidification layer is made on the surface of the retaining wall 200 to enhance the anti-seepage and moisture retention capabilities of the slope and increase the mechanical properties of the cement soil retaining wall surface. Construction method of the microbial solidification layer: the microbial solidification layer is made by surface spraying, and the spraying order is: Bacillus spores → CaCl solution → activator, and after spraying evenly, a film is covered for curing for 24 hours, and then the above process is repeated 3 to 7 times to form a stable microbial solidification layer.

[0054] S4, insert the anchor assembly 300 on the surface of the microbial solidification layer 210, so that one end of the anchor assembly 300 is embedded in the slope matrix 100, and the other end partially protrudes from the microbial solidification layer 210; the anchor assembly 300 is preferably at an angle of 10 to 30 degrees to the horizontal direction. The surface of the parts of the anchor assembly 300 can be treated with anti-corrosion. The anchor assembly 300 can strengthen the connection between the retaining wall 200 and the slope matrix 100 and provide a fixed fulcrum for the wire mesh.

[0055] S5, a steel mesh is laid on the outside of the microbial solidification layer 210, and the steel mesh 400 is spaced apart from the microbial solidification layer 210, and the steel mesh 400 is welded to the end of the anchor assembly 300 protruding from the microbial solidification layer 210. The steel mesh is a high-strength, corrosion-resistant galvanized steel wire, and can be a machine-woven diamond steel mesh with a mesh size of 50*50mm. When the steel mesh is installed, it is raised with a pad and then welded to the end of the anchor assembly 300 protruding from the microbial solidification layer 210, so that a certain distance is maintained between the steel mesh and the microbial solidification layer 210, and the distance can be 50-70mm, and the main function is to provide adhesion for the planting substrate.

[0056] S6, laying a plant substrate layer 500 on the outer surface of the microbial solidification layer 210 and covering the steel mesh 400. The plant substrate layer 500 mainly uses cement, clay, polypropylene fiber, peat, compound fertilizer, tap water, functional biological bacteria, and plant seeds as raw materials for the plant substrate, which are mixed in a certain proportion and then sprayed to form a plant substrate with a thickness of about 10 cm. It is suitable to use non-woven geotextiles for covering and maintenance. The main function of the plant substrate is to create green landscapes and protect slopes.

[0057] In addition, the bottom of the retaining wall 200 can be filled with hard rock block material to form a support seepage ditch 600 to drain the groundwater inside the slope. The support seepage ditch 600 can be arranged with a depth of 2.5m, a width of 1.5m, and a spacing of 4.5m. Considering that the support seepage ditch 600 is the foundation of the retaining wall 200, a C15 concrete cushion with a thickness of not less than 20cm can be applied to the upper part of the support seepage ditch 600. If there is groundwater seepage in the slope base 100, a layer of geotextile should be laid between the slope base 100 and the retaining wall 200, and the seepage path should be connected with the seepage ditch. A drainage ditch 700 should be set at the bottom of the slope, and the drainage ditch 700 can be in contact with the bottom of the retaining wall 200, the microbial solidification layer 210, the wire mesh 400 and the vegetation substrate layer 500. Prevent the retaining wall 200 and the vegetation substrate layer 500 from being eroded as a whole.

[0058] Reference Fig.10 In a specific embodiment of the present invention, step S4 specifically includes steps S41, S42, S43 and S44.

[0059] S41, a socket 110 is opened in the retaining wall 200 and the slope base 100, the socket 110 passes through the retaining wall 200 and extends into the slope base 100, and an outward expansion groove 111 is opened on the outer periphery of the bottom of the socket 110; the outward expansion groove 111 can be opened by using a rotary cutting mechanism, firstly, the socket 110 is excavated by using a rotary excavation device, and then the rotary cutting mechanism is extended into the socket 110, the rotary cutting mechanism includes a rotating shaft and a rotary cutting knife at the bottom of the rotating shaft, and the rotating shaft rotates and moves in a circle along the peripheral wall of the socket 110, so that an annular outward expansion groove 111 is formed by using the rotary cutting knife.

[0060] S42, insert the anchor rod assembly 300 into the socket 110; specifically, the anchor rod assembly 300 is inserted into the socket 110 until the bonding plate 325 is bonded to the microbial solidification layer 210, avoiding insertion too deep or too shallow, limiting the insertion depth, and at the same time, the insertion rod 326 on the bonding plate 325 is inserted into the microbial solidification layer 210 and the retaining wall 200, so that during installation, a preliminary fixing effect is achieved to avoid large shaking of the hollow outer rod 320 during grouting.

[0061] S43, the hollow inner rod 330 is adjusted to the second state, and the hollow inner rod 330 pushes the hook plate 310 to switch from the contracted state to the open state, so that the hook plate 310 is opened outward to the outer expansion groove 111, and the outer end of the hollow inner rod 330 protrudes from the microbial solidification layer 210 for welding the wire mesh 400. Specifically, the hollow inner rod 330 in the first state is screwed so that the hollow inner rod 330 is screwed into the hook plate 310, and the screwing of the hollow inner rod 330 into the hook plate 310 can push the hook plate 310 to switch from the contracted state to the open state until the hook plate 310 abuts against the first abutting surface 323, so that the hook plate 310 is opened outward to the outer expansion groove 111, and the hook plate 310 is fixed in position under the cooperation of the first abutting surface 323 and the hollow inner rod 330, so as to avoid unstable position during grouting.

[0062] S44, the outer end of the hollow inner rod 330 is connected to the grouting pipeline, and concrete is injected into the hollow inner rod 330. The concrete flows along the second center hole 331 and passes through the avoidance gap 322 to fill the gap between the outer expansion groove 111, the insertion hole 110 and the hollow inner rod 330. Figure 4 As shown, there is a gap between the end wall of the hollow outer rod 320 and the bottom wall of the socket 110, and part of the concrete can also flow out from the inner end outlet of the second center hole 331 to the socket 110 and the outer expansion groove 111. In addition, the outer diameter of the hollow outer rod 320 is smaller than that of the socket 110, which will cause a gap between the peripheral wall of the socket 110 and the hollow outer rod 320, and the concrete will also fill the gap, thereby reducing the installation gap, making the position of the hollow outer rod 320 stable, and improving the tightness of the connection with the slope base 100. In addition, even if the hollow outer rod 320 and the socket 110 are not coaxial during installation and have a certain deviation, the concrete will fill the gap completely, and will not affect the installation stability of the anchor assembly 300.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slope support system, characterized in that: include: Slope base (100); A retaining wall (200) is provided on the slope surface of the slope base (100), and a microbial solidification layer (210) is formed on the outer side; An anchor rod assembly (300), one end of which passes through the retaining wall (200) and is embedded in the slope matrix (100), and the other end of which partially protrudes from the microbial solidification layer (210); The steel mesh (400) is spaced apart from the microbial solidification layer (210) and is welded to the end of the anchor rod assembly (300) protruding from the microbial solidification layer (210); The plant substrate layer (500) is laid on the outer surface of the microorganism solidification layer (210) and covers the steel mesh (400); The retaining wall (200) and the slope base (100) are formed with an insertion hole (110) corresponding to the anchor rod assembly (300); an inner end peripheral wall of the insertion hole (110) is provided with an outward expansion groove (111); the inner end of the anchor rod assembly (300) is inserted into the insertion hole (110) and provided with a hook plate (310) that is expanded outward to the outward expansion groove (111); the outward expansion groove (111) is filled with concrete to wrap the hook plate (310); The anchor rod assembly (300) comprises a hollow outer rod (320), a first center hole (321) is provided at the center of the hollow outer rod (320), and an avoidance notch (322) is provided on the bottom peripheral wall of the hollow outer rod (320); The hook plate (310) has a contracted state in which it is retracted to not protrude from the outer peripheral wall of the hollow outer rod (320) and an open state in which it is opened to protrude from the outer peripheral wall of the hollow outer rod (320). The hook plate (310) is hinged to the side wall of the avoidance notch (322) to achieve switching between the contracted state and the open state. The outer end of the hollow outer rod (320) is provided with a bonding plate (325), and the bonding plate (325) is bonded to the microorganism solidification layer (210) and is provided with an insertion rod (326); The anchor rod assembly (300) further comprises a hollow inner rod (330); a second center hole (331) is provided at the center of the hollow inner rod (330); The hollow inner rod (330) is installed in the first center hole (321) of the hollow outer rod (320) and can be adjusted along the axis of the hollow outer rod (320) and then fixed. The hollow inner rod (330) has a first state corresponding to the hook plate (310) in the retracted state and a second state corresponding to the hook plate (310) in the expanded state. The hollow inner rod (330) can be moved along the axis of the hollow outer rod (320) to achieve switching between the first state and the second state. The hollow inner rod (330) can push the hook plate (310) to switch from the contracted state to the expanded state during the movement toward the second state; the outer end of the hollow inner rod (330) in the second state protrudes from the microbial solidification layer (210); when the hook plate (310) is in the expanded state, the avoidance gap (322) can allow a fluid medium to pass through; the hollow inner rod (330) can allow external concrete to be injected to complete the concrete filling and pouring of the insertion hole (110) and the outward expansion groove (111).

2. The slope support system according to claim 1, characterized in that: The hook plates (310) and avoidance notches (322) are arranged in multiple groups along the circumferential direction.

3. The slope support system according to claim 1, characterized in that: A first abutting surface (323) is provided on the upper side of the avoidance notch (322), and a second abutting surface (324) is provided on the lower side of the avoidance notch (322). The hook plate (310) includes a hinged tube (311), a contact portion (312), and an opening portion (313). Both the contact portion (312) and the opening portion (313) are connected to the hinged tube (311). In the opening state, the contact portion (312) contacts the lower end of the hollow inner rod (330), and the opening portion (313) opens outward. In the open state, the open portion (313) abuts against the first abutting surface (323); In the contracted state, the expanded portion (313) abuts against the second abutting surface (324).

4. The slope support system according to claim 3, characterized in that: The outer diameter of the hollow outer rod (320) is smaller than the insertion hole (110); the end of the opening portion (313) is provided with a bent portion (314) that is folded and bent outward toward the hinged cylinder (311).

5. The slope support system according to claim 1, characterized in that: The lower end of the first center hole (321) is provided with a threaded hole section (327), and the lower end of the hollow inner rod (330) is provided with a threaded section (334) threadedly connected to the threaded hole section (327).

6. The slope support system according to claim 5, characterized in that: The outer end of the hollow inner rod (330) is provided with a threaded shaft section (332) and a screw shaft section (333) in sequence facing inward, and the outer peripheral contour of the cross section of the screw shaft section (333) is a regular polygon.

7. A slope support construction method for forming the slope support system according to any one of claims 1 to 6; characterized in that: The steps include: S1, excavating the slope to form the slope base (100); S2, filling the slope surface of the slope base (100) to form a retaining wall (200); S3, forming a microbial solidification layer (210) on the outer surface of the retaining wall (200); S4, inserting the anchor rod assembly (300) on the surface of the microbial solidification layer (210) so that one end of the anchor rod assembly (300) is embedded in the slope matrix (100) and the other end partially protrudes from the microbial solidification layer (210); S5, laying a steel mesh outside the microbial solidification layer (210), and spacing the steel mesh (400) from the microbial solidification layer (210), and welding the steel mesh (400) to the end of the anchor assembly (300) protruding from the microbial solidification layer (210); S6, laying a plant base material layer (500) on the outer surface of the microorganism solidification layer (210) and covering it with the wire mesh (400).

8. The slope support construction method according to claim 7, characterized in that: Step S4 specifically includes: S41, opening a socket (110) in the retaining wall (200) and the slope base (100), the socket (110) passing through the retaining wall (200) and extending into the slope base (100), and opening an outward expansion groove (111) on the outer periphery of the bottom of the socket (110); S42, inserting the anchor rod assembly (300) into the insertion hole (110); S43, adjusting the hollow inner rod (330) to the second state, the hollow inner rod (330) pushes the hook plate (310) to switch from the contracted state to the open state, so that the hook plate (310) is opened outward to the outer expansion groove (111), and the outer end of the hollow inner rod (330) protrudes from the microbial solidification layer (210) to be welded to the wire mesh (400); S44, the outer end of the hollow inner rod (330) is connected to the grouting pipeline, and concrete is injected into the hollow inner rod (330), and the concrete passes through the avoidance gap (322) and fills the gap between the outer expansion groove (111), the insertion hole (110) and the hollow outer rod (320).

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