Rib column type slope reinforcing device and system

Abstract

The invention discloses a rib column type slope reinforcing device and system. The rib column type slope reinforcing device comprises a reinforced concrete stand column, a reinforcement cage and an anchor rod. The reinforcement cage is arranged in the reinforced concrete stand column; the anchor rod comprises an anchor rod body, an anchorage device and a centering device; the centering device is arranged on the anchor rod body in a sleeving mode, and the anchor head end of the anchor rod body extends into the reinforcement cage and is connected with the anchorage device in the reinforcement cage. The anchor head and the anchorage device of the anchor rod body are poured together with the reinforced concrete stand column; the anchorage device comprises a load dispersion tray and a pre-tightening coupling nut; the load dispersion tray and the pre-tightening coupling nut are both in threaded connection with the anchor rod body; one end of the load dispersion tray abuts against the reinforcement cage; and the other end of the load dispersion tray is connected with the pre-tightening coupling nut. And effective protection on the side slope is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope support, in particular to a rib-column type slope reinforcing device and system. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] The building slope refers to the artificial slope formed by building construction excavation or backfilling in the building site and its surroundings, and the unstable and dangerous natural slope. The slope support is the structural support, reinforcement and protection taken for the slope to ensure the stability and safety of the slope.

[0004] As the mainstream technology in the field of slope, the anchor rod support is widely used in highway, railway, mine, water conservancy and building foundation pit engineering. In order to improve the corrosion resistance of the anchor rod used in the anchor rod support, the material of the anchor rod is selected as GFRP material to cope with the geological environment with rich underground water content.

[0005] However, in this kind of anchor rod support, the anchor head part of the anchor rod still uses a gasket and a steel nut, and the anchor head part is not integrally poured with the lattice groove, so that the steel anchoring part is exposed outside, affecting the service life of the anchor head part. In addition, the concrete in the lattice groove and the anchor rod do not form a whole, which is easy to cause uneven deformation inside the slope, and further cause the occurrence of local excessive deformation. SUMMARY

[0006] In order to solve the above problems, the present application provides a rib-column type slope reinforcing device and system, which realizes effective support for the slope.

[0007] To achieve the above object, the present application adopts the following technical scheme: In a first aspect, a rib-column type slope reinforcing device is provided, comprising: a reinforced concrete stand, a steel reinforcement cage and an anchor rod; The steel reinforcement cage is arranged in the reinforced concrete stand; the anchor rod comprises an anchor rod body, an anchor device and a centering device; the centering device is sleeved on the anchor rod body, the anchor head end of the anchor rod body extends into the steel reinforcement cage and is connected with the anchor device in the steel reinforcement cage; and the anchor head of the anchor rod body and the anchor device are integrally poured with the reinforced concrete stand; The anchor device comprises a load dispersion tray and a pre-tightening coupling nut; the load dispersion tray is nested on the anchor rod body, and the pre-tightening coupling nut is threadedly connected with the anchor rod body; one end of the load dispersion tray abuts against the steel reinforcement cage; the other end of the load dispersion tray is connected with the pre-tightening coupling nut.

[0008] Further, a plurality of anchor rods are arranged along the length direction of the steel reinforcement cage.

[0009] Further, the load dispersion tray comprises an upper ring, a lower ring and a connecting rod; the upper ring and the lower ring are coaxially arranged, and the upper ring and the lower ring are fixedly connected through the connecting rod; the upper ring is threadedly connected with the anchor rod body; the outer diameter of the lower ring is larger than the spacing of the steel bars in the steel cage; and the pre-tightening coupling nut is clamped with the upper ring.

[0010] Further, the upper ring and the lower ring are axially spaced apart by a certain distance.

[0011] Further, the pre-tightening coupling nut comprises a nut body and a clamping head connected with each other; the nut body and the clamping head are coaxially arranged; the nut body is threadedly connected with the anchor rod body; the clamping head comprises a plurality of clamping claws which are uniformly arranged along the circumference of the nut body; and the adjacent clamping claws are spaced apart by a certain distance.

[0012] Further, a plurality of centralizers are arranged on the anchor rod body and are threadedly connected with the anchor rod body.

[0013] Further, the centralizer comprises a connecting column, a flange plate and a reinforcing rib; the connecting column is connected with the anchor rod body; one end of the connecting column is connected with the flange plate, and the reinforcing rib is connected between the connecting column and the flange plate.

[0014] Further, a plurality of open grooves are uniformly arranged along the circumference of the flange plate.

[0015] In the second aspect, a rib-column type slope reinforcement system is provided, which comprises the rib-column type slope reinforcement device provided in the first aspect. The anchor rod in the rib-column type slope reinforcement device extends into the slope body; the steel cage in the rib-column type slope reinforcement device leans on the sliding surface of the slope body; and the reinforced concrete column in the rib-column type slope reinforcement device is poured together with the sliding surface of the slope body.

[0016] Further, the rib-column type slope reinforcement system further comprises a slope protection vegetation planting layer, a vegetation protection pad, a water interception ditch and slope protection vegetation; the water interception ditch is located at the top of the slope body; the vegetation protection pad and the slope protection vegetation are arranged between the water interception ditch and the edge of the top of the slope body; and the slope protection vegetation planting layer is arranged on the sliding surface of the slope body.

[0017] Compared with the prior art, the rib-column type slope reinforcement system has the following beneficial effects: The rib-column type slope reinforcing device and system provided by the application, the device is connected with the anchor head of the anchor rod body through the anchor device and the anchor rod body, the anchor rod and the steel reinforcement cage are connected together to provide continuous anchoring force, effectively solve the problem that the GFRP anchor rod cannot be bent and anchored and welded like the traditional steel anchor rod, significantly improve the contact area between the anchoring part and the reinforced concrete column, thereby enhancing the anchoring force, and effectively preventing the internal deformation of the slope caused by uneven distribution of the anchoring force; in addition, the device pours the anchor device and the reinforced concrete column together, further improves the anchoring force, and provides protection for the anchor head and the anchor device, improves the service life of the anchor rod, can avoid the construction method of welding the anchor head part of the traditional anchor rod and the steel, reduces the construction period and steps.

[0018] The advantages of the additional aspects of the application will be partially given in the following description, partially become obvious from the following description, or be known by the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application given below, serve to explain the application, and do not constitute an improper limitation on the application.

[0020] Figure 1 A rib-column type slope reinforcing device structure side view is provided for the application; Figure 2 An anchor device explosion view is provided for the application; Figure 3 A centralizer structure schematic view is provided for the application; Figure 4 An anchor rod structure schematic view is provided for the application.

[0021] Figure 5 A rib-column type slope reinforcing system main body structure plan view is provided for the application. DETAILED DESCRIPTION

[0022] The application will be further described below in conjunction with the drawings and embodiments.

[0023] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0024] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0025] In the present application, the terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is a relationship word determined only for the purpose of describing the structural relationship of the components or elements of the present application, and is not intended to specify any component or element in the present application, and cannot be understood as a limitation on the present application.

[0026] In the present application, the terms such as "fixedly connected", "connected", "connected" and the like should be understood broadly, which means that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant researchers or technicians in the art, the specific meaning of the above terms in the present application can be determined according to the specific circumstances, and cannot be understood as a limitation on the present application.

[0027] Example 1 In recent years, with the development of cities, more and more buildings involve slope problems when they are built, and people pay more and more attention to slope support. In areas with more mountains, slope support is particularly common. Building slope refers to the artificial slope formed by building site and its surroundings due to building construction excavation or backfilling, as well as unstable and dangerous natural slopes. Slope support is to ensure the stability and safety of the slope, and to take structural support, reinforcement and protection for the slope.

[0028] As the mainstream technology in the field of slope, anchor rod support is widely used in highway, railway, mine, water conservancy and building foundation pit engineering. This technology has high maturity, perfect design specification and standardized construction process. Its construction disturbance is small, no large area excavation is needed, which effectively saves the amount of earthwork and supporting materials, thereby reducing the comprehensive cost. In addition, the anchor rod support structure is light and compact, which can maximize the preservation of the original terrain and site space, has a significant space saving advantage, and in the treatment of deep landslide and high and steep rock slope engineering, anchor rod support plays a key role.

[0029] Although the anchor rod support method is widely used in support technology, there are still some unavoidable problems in the traditional anchor rod material. For example, a system supported by frame beams and columns and traditional steel anchor rods; this system can effectively improve the overall strength of the support system, can be more stably fixed on the slope, and has good applicability. However, the anchor rod material selects steel, which is difficult to ensure that the required tensile strength is provided in the slope with a large slope ratio, especially in the slope engineering with abundant groundwater and containing chemical substances corrosive to metal, the traditional steel anchor rod is prone to corrosion failure, and its corrosion resistance cannot meet the actual needs of the project, thereby increasing the safety hazard of the slope engineering. Although corrosion prevention technical measures such as anchor rod support and adding expansion agent to grouting slurry can be used in anchor rod engineering, for some slope engineering with complex geological conditions, abundant groundwater and containing chemical substances corrosive to metal, these corrosion prevention technologies do not fundamentally solve the problem of corrosion and failure of anchor rods.

[0030] Therefore, composite anchor rods emerge as the times require, such as green slope protection technology using GFRP anchor rods and prefabricated lattice slots for collaborative support. This technology replaces the traditional anchor rod with a GFRP anchor rod with significantly improved corrosion resistance to cope with geological environments with abundant groundwater content. The composite material used in the anchor rod is mainly glass fiber reinforced polymer, i.e. GFRP, which is a new material formed by using glass fiber as reinforcing material, synthetic resin as matrix material, and once forming through pultrusion, winding thread, and curing. This material has the advantages of small mass, high tensile strength, corrosion resistance, fatigue resistance, and strong anti-electromagnetic interference ability. However, the anchor head part of the GFRP anchor rod still uses a gasket and a steel nut, and the anchor head part is not integrally poured with the lattice slot, resulting in the steel anchoring part being exposed outside, affecting the service life of the anchor head part. In addition, the concrete in the lattice slot and the anchor rod do not form a whole, which can easily cause uneven deformation inside the slope, and further cause local excessive deformation.

[0031] An embodiment of the present invention proposes a rib-column slope reinforcement device, in which the anchor rods are made of GFRP to improve the corrosion resistance of the anchor rods and significantly increase the service life of the anchor rods. The anchor heads of traditional anchor rods using steel bars are fixedly connected to the rib beams by directly bending. However, for GFRP anchor rods, due to the limitations of the performance of the GFRP material itself, they cannot be anchored to the rib beams by directly bending like traditional steel bar anchor rods. The shear strength of GFRP anchor rods is also much lower than its tensile strength. If ordinary clip-type anchors are used, excessive clamping force is generated on the fiber reinforcement in the anchoring area, resulting in shear failure of the fiber reinforcement, which creates difficulties for the anchoring of GFRP anchor rods (anchoring to reinforced concrete columns). The embodiment of the present invention innovatively adopts and improves the fully threaded GFRP anchor nut tray anchor. The ribbed column slope reinforcement device proposed in this invention utilizes a threaded connection between the anchor and the anchor head to anchor the anchor rod to the reinforcement cage. The anchor comprises a load-distributing tray and a pre-tightening coupling nut, both made of GFRP. The load-distributing tray is disc-shaped and nested within the anchor rod's anchor head, providing continuous anchoring force and forming a cast-in-place connection with the reinforced concrete column at the anchor head. This eliminates the traditional method of welding the anchor rod's anchor head to the reinforcement, reducing construction time and steps.

[0032] Combine Figures 1-5 , a rib column type slope reinforcement device proposed in an embodiment of the present invention is described in detail.

[0033] like Figure 1 As shown, a rib column type slope reinforcement device proposed in an embodiment of the present invention includes: a reinforced concrete column 6, a steel cage 5 and an anchor rod; The steel cage 5 is set in the reinforced concrete column; the anchor rod includes an anchor rod body 4, an anchor 2 and a centering device 3; the centering device 3 is sleeved on the anchor rod body 4, and the anchor head end of the anchor rod body extends into the steel cage 5 and is connected to the anchor 2 inside the steel cage 5; and the anchor head of the anchor rod body and the anchor 2 are cast together with the reinforced concrete column 6; The anchor 2 includes a load distribution tray 2-2 and a pre-tightening coupling nut 2-1; the load distribution tray 2-2 is nested on the anchor rod body 4, and the pre-tightening coupling nut 2-1 is threadedly connected to the anchor rod body 4; one end of the load distribution tray 2-2 abuts against the steel cage 5; the other end of the load distribution tray 2-2 is connected to the pre-tightening coupling nut 2-1.

[0034] Among them, the anchor rod body 4, the pre-tightening coupling nut 2-1, the load distribution tray 2-2 and the centering device 3 are all made of GFRP material.

[0035] The rib-column type slope reinforcing device provided by the embodiment of the present application connects the anchor rod and the steel reinforcement cage together through the threaded connection of the anchor device and the anchor head of the anchor rod body, provides sustained anchoring force, effectively solves the problem that the GFRP anchor rod cannot be bent and anchored and welded like the traditional steel anchor rod, significantly improves the contact area between the anchoring member and the reinforced concrete column, thereby enhancing the anchoring force and effectively preventing the internal deformation of the slope caused by uneven distribution of the anchoring force; in addition, the device pours the anchor device and the reinforced concrete column together, further improves the anchoring force, and provides protection for the anchor head and the anchor device, improves the service life of the anchor rod, can avoid the construction method of welding the anchor head part of the traditional anchor rod with the steel reinforcement, and reduces the construction period and steps.

[0036] As shown in Figure 2 The load dispersion tray 2-2 includes an upper circular ring 2-2-1, a lower circular ring 2-2-2, and a connecting rod 2-2-3; the upper circular ring 2-2-1 is coaxially arranged with the lower circular ring 2-2-2, and the upper circular ring 2-2-1 and the lower circular ring 2-2-2 are fixedly connected through the connecting rod 2-2-3; the upper circular ring 2-2-1 is threadedly connected with the anchor rod body; the outer diameter of the lower circular ring 2-2-2 is greater than the spacing of the steel bars in the steel reinforcement cage 5; and the pre-tightening coupling nut 2-1 is clamped with the upper circular ring.

[0037] The upper circular ring 2-2-1 and the lower circular ring 2-2-2 are spaced apart by a certain distance in the axial direction.

[0038] The load dispersion tray 2-2 is disc-shaped, usually with a diameter of 100-200 mm, is nested in the anchor head part of the anchor rod body 4, and provides sustained anchoring force and is cast in one piece with the reinforced concrete column 6. The disc-shaped design of the load dispersion tray 2-2 increases the contact area with the reinforced concrete column 6, makes the anchoring force more evenly distributed, and improves the stability and reliability of anchoring.

[0039] The pre-tightening coupling nut 2-1 includes a nut body 2-1-1 and a clamping head connected with each other; the nut body 2-1-1 is coaxially arranged with the clamping head; the nut body 2-1-1 is threadedly connected with the anchor rod body 4, the clamping head includes a plurality of clamping claws 2-1-2, the plurality of clamping claws 2-1-2 are arranged at intervals along the circumference of the nut body 2-1-1.

[0040] The nut body 2-1-1 is hexagonal, and the height of the nut body 2-1-1 is about 80 mm, which facilitates installation and locking by using tools such as wrenches, is simple and quick to operate, greatly improves the construction efficiency, and fixes the pre-tightening coupling nut 2-1 on the outer anchor section of the anchor rod body 4 through the threaded connection, and clamps the outer end of the load dispersion tray through the clamping head, to ensure that reliable anchoring force is provided. The anchor device 2 and the anchor head part of the anchor rod body 4 are embedded in the steel reinforcement cage 5 after installation is completed.

[0041] The anchor rod body 4 of the embodiment of the present application is externally provided with threads, the diameter of the anchor rod body 4 is generally 20-25 mm, the overall length ranges from 5-10 m, the insertion angle is generally between 15° and 35°, and the specific length and diameter need to be determined according to the required uplift bearing capacity of the slope protection project. For example, if the diameter of the selected GFRP anchor rod is 22 mm, the length is 10 m, and the inclination angle is 20°, the anchor rod hole diameter is 100 mm. The anchor device 2 and the centralizer 3 are installed on the anchor rod body 4, and then the anchor rod body 4 is inserted into the anchor rod hole that has been constructed. The reinforced concrete column 6 and the anchor head part of the anchor rod body 4 and the anchor device 2 are poured into one body using concrete. During the working stage of the GFRP anchor rod, the load dispersion tray 2-2 at the anchor head part generates a biting force with the anchor rod body 4, and the force is transmitted to the pre-tightening coupling nut 2-1, which can provide sufficient locking force, tightly engages with the load dispersion tray 2-2, tightly combines the load dispersion tray 2-2 with the anchor rod body 4, and rapidly forms an uplift anchoring force at the anchor head part. The surface of the load dispersion tray 2-2 is smooth and has a large surface area, which can effectively disperse and transmit the anchoring force, thereby achieving the goal of jointly anchoring the anchor rod body 4.

[0042] To ensure that the anchor rod can maintain a central position in the hole during insertion into the anchor hole, avoid the anchor rod from contacting the hole wall during installation, and ensure that a full-range and uniform protective layer with a thickness of not less than 20 mm or meeting the design requirements is formed between the anchor rod and the hole wall after pouring the cement mortar, the embodiment of the present application is provided with a plurality of centralizers 3 on the anchor rod body 4, the centralizers 3 are threadedly connected with the anchor rod body 4, as shown in Figure 4 .

[0043] As shown in Figure 3 , the centralizer 3 includes a connecting column 3-1, a flange plate 3-2, and a reinforcing rib 3-3; the connecting column 3-1 is connected with the anchor rod body 4; one end of the connecting column 3-1 is connected with the flange plate 3-2, and the reinforcing rib 3-3 is connected between the connecting column 3-1 and the flange plate 3-2.

[0044] The embodiment of the present application is also provided with a plurality of open grooves 3-4 distributed along the circumference of the flange plate 3-2, which provide a smooth annular channel for the flow of grout during grouting and anchoring.

[0045] The centralizer 3 is sleeved on the anchoring section of the anchor rod body 4 during construction, and one centralizer is arranged every 2 m. The centralizer 3 is made of GFRP material, and the length is set according to requirements, such as 10 mm. A threaded hole is arranged in the connecting column 3-1, and the threaded hole is matched with the thread on the anchor rod body 4. The diameter of the flange plate 3-2 at the bottom is slightly smaller than the hole diameter of the anchor hole. The use of the centralizer 3 maintains the anchor rod in the central position, and provides a smooth annular channel for the flow of slurry, which helps to achieve full and dense grouting effect of the whole hole section, and ensures good bonding between the grouting body and the hole wall.

[0046] The steel reinforcement cage 5 is made of steel binding and is used to be inclined on the sliding surface of the slope. In order to be able to pour the GFRP anchor 2 into the concrete, further play the anchoring effect, according to the Technical Code for Building Slope Engineering GB50330-2013, the main stress reinforcement of the steel reinforcement cage 5 is usually HRB400 steel with a diameter range of 12-16 mm, and the distribution reinforcement is usually HRB300 steel with a diameter range of 6-10 mm. When the anchor 2 is embedded in the steel reinforcement cage 5, the length of the anchor head part of the anchor rod body 4 is controlled within the maximum size of the reinforced concrete column 6. Then, the prefabricated formwork is installed, and the concrete with a strength grade not less than C25 is poured to form the reinforced concrete column 6.

[0047] The embodiment of the present application can set multiple reinforcement devices according to the size of the supported slope, and arrange multiple anchor rods along the length direction of the steel reinforcement cage 5.

[0048] The rib-column type slope reinforcement device provided by the embodiment of the present application is made of GFRP material, which significantly improves the durability and corrosion resistance of the anchor rod support technology, can be cooperatively supported with the reinforced concrete column, improves the stability of the slope, and effectively solves the problem that the GFRP anchor rod cannot be bent and anchored and welded like the traditional steel anchor rod. The anchor of the device significantly improves the contact area between the anchoring member and the reinforced concrete column, can better spread the stress to the reinforced concrete column, makes the anchoring force more uniform, thereby enhances the anchoring force, effectively prevents the internal deformation of the slope caused by uneven distribution of the anchoring force, and improves the stability and reliability of the anchoring. In addition, the construction technology is simple and easy to implement, which helps to reduce the cost and increase the efficiency of the project. The GFRP material is a green and low-carbon material, which has significant economic and environmental benefits, and the construction process is convenient, which can effectively reduce the cost and improve the efficiency.

[0049] The rib-column type slope reinforcement device provided by the embodiment of the present application is made of GFRP material, which significantly improves the durability and corrosion resistance of the anchor rod support technology, can be cooperatively supported with the reinforced concrete column, improves the stability of the slope, and effectively solves the problem that the GFRP anchor rod cannot be bent and anchored and welded like the traditional steel anchor rod. The anchor of the device significantly improves the contact area between the anchoring member and the reinforced concrete column, can better spread the stress to the reinforced concrete column, makes the anchoring force more uniform, thereby enhances the anchoring force, effectively prevents the internal deformation of the slope caused by uneven distribution of the anchoring force, and improves the stability and reliability of the anchoring. In addition, the construction technology is simple and easy to implement, which helps to reduce the cost and increase the efficiency of the project. The GFRP material is a green and low-carbon material, which has significant economic and environmental benefits, and the construction process is convenient, which can effectively reduce the cost and improve the efficiency.

[0049] The process of the rib-column type slope reinforcement device provided by the embodiment of the present application is as follows: I. According to the specific excavation depth requirement of slope design, earth excavation operation is carried out. In this embodiment, the slope is a first-order slope, the slope foot angle is 70°, and the excavation depth reaches 7 meters. In the specific operation process, first, a comprehensive and detailed site survey is carried out to accurately determine the specific position and range of the excavation area, ensuring the accuracy of the excavation work. Then, use the excavator to gradually excavate the earth according to the established plan. During the excavation process, strictly control the slope foot angle to ensure that it meets the design requirements and ensure the stability of the slope. At the same time of excavation, real-time monitoring of the excavation depth is carried out to avoid over-excavation or under-excavation.

[0050] II. Measurement and setting out The measurement personnel review the slope gradient according to the design drawings to ensure that the position, spacing and size of the reinforced concrete column 6 are strictly measured and set out according to the design requirements. On the slope surface, the design specifications of the reinforced concrete column 6 are marked with a string, and then the hole position of the anchor rod body 4 is accurately measured and set out on the slope surface and numbered, and marked with lime line to ensure that the hole position error does not exceed 50 mm.

[0051] III. Drilling After the anchor hole is measured and positioned, the drill is installed according to the slope hole position to adjust the drill position and downward angle. Dry drilling should be used for drilling, and water drilling is strictly prohibited. The drilling angle with the horizontal plane is constructed according to the design inclination, and the hole inclination of the anchor hole does not exceed ±2°. During drilling, appropriate drilling tools should be selected according to the encountered rock and soil layers, the longitudinal and transverse errors of drilling do not exceed ±5cm, and the elevation error does not exceed ±10cm. The drilling should be over-drilled by 50cm as the hole bottom sediment section. After drilling to the designed depth, it cannot be stopped immediately, and needs to be stabilized for 1-2 minutes to prevent hole bottom collapse deformation. After drilling is completed, high-pressure air should be used to clean the hole, the air pressure is 0.2-0.4 MPa, and all the rock and soil powder and water in the hole are cleaned out.

[0052] IV. Anchor rod processing and installation S1, installation of centering device 3 After the anchor hole construction is completed, the pre-prepared centering device 3 is installed on the anchor rod body 4. The installation position is determined according to the design requirements, and an inner anchoring part is set every 2m.

[0053] S2, anchor rod placement The prepared GFRP anchor rod (including anchor rod body and centralizer) is numbered according to the designed insertion position, which corresponds to the anchor hole number. The anchor rod body with the centralizer is transported to the construction site, and after confirmation, the hole is cleaned again with high-pressure air, the anchor rod body is installed, and the part exceeding the hole and the length are reserved according to the design requirements. It should not be less than 120 cm to ensure its reliability with the reinforced concrete column 6 connection. The anchor head end of the anchor rod body 4 is installed with the anchor device 2, the pre-tightening coupling nut 2-1 is threadedly connected with the anchor rod body 4, and whether it is installed firmly is determined.

[0054] Five, anchor hole grouting The pressure grouting machine is used for grouting, the hole bottom back grouting method is used for one-time grouting in the anchor hole, the actual grouting amount is generally greater than the theoretical grouting amount, the grouting is ended as the grout overflow at the hole is taken as the standard, after the grout solidification shrinkage, secondary grouting should be carried out, the anchor rod should not be moved before the grouting body solidification, and the maintenance is not less than 7 days.

[0055] Six, reinforced concrete column 6 construction Before the reinforced concrete column 6 construction, the column position and the starting range are measured and placed, and after acceptance, the steel reinforcement cage 5 can be started to be woven. Before weaving, the dross on the slope surface is removed. The mortar cushion with the same thickness as the pouring concrete protection layer is prepared in advance. The bottom stress steel of the steel reinforcement cage 5 is placed below the load dispersion tray 2-2, the entire anchor device 2 is placed in the steel reinforcement cage 5, and it is ensured that the diameter of the load dispersion tray 2-2 is greater than the spacing of the distributed steel behind. The steel is bound, the mortar cushion prepared in advance is padded, and the protection layer must meet the design requirements. The net protection layer of the stress main reinforcement of the reinforced concrete column 6 is not less than 40 mm, and the net protection layer of the distributed steel and the stirrup is not less than 35 mm. The supporting formwork adopts a wooden formwork, the surface of the wooden formwork is brushed with a release agent before installation, and the assembled formwork is flat and tight according to the design size. After the formwork is erected, the formwork is fixed by steel anchor nails, the bottom of the formwork is in close contact with the slope surface, and the formwork is prevented from running and expanding. The reinforced concrete column 6 construction must be continuous, the construction is vibrated and compacted, and the formwork is removed after the concrete curing reaches the design strength. The curing time is not less than 7 days. It is ensured that the anchor device 2 and the concrete column 6 form an integral whole and play an anchoring role together.

[0056] Example 2 In this example, a rib-column type slope reinforcement system is proposed, as shown in Figure 5 including the rib-column type slope reinforcement device proposed in example 1 of the present application; The anchor rod in the rib-column type slope reinforcement device extends into the slope body; the steel reinforcement cage 5 in the rib-column type slope reinforcement device leans on the slope sliding surface 1; the reinforced concrete column of the rib-column type slope reinforcement device is poured together with the slope sliding surface 1.

[0057] The rib-column type slope reinforcement system provided by the embodiment of the present application further comprises a slope-protecting vegetation planting layer 7, a vegetation protection pad 8, a water intercepting ditch 9 and slope-protecting vegetation 10; the water intercepting ditch 9 is located at the top of the slope body; the vegetation protection pad 8 and the slope-protecting vegetation 10 are arranged between the water intercepting ditch 9 and the edge of the top of the slope body; and the slope-protecting vegetation planting layer 7 is arranged on the sliding surface of the slope body.

[0058] Specifically, according to the actual topography of the slope top, the water intercepting ditch 9 is excavated, the excavation position is not less than 5 m away from the rear edge of the slope opening or the collapse and sliding area, the bottom width and the top width of the water intercepting ditch 9 are not less than 5 m, the cross section of the water intercepting ditch 9 can be trapezoidal or rectangular, the longitudinal slope of the ditch bottom is not less than 0.3%, the water intercepting ditch after excavation needs to be treated for seepage prevention, and the mortar strength grade of the cross section is not less than M7.5. After the excavation is completed, the slope surface is backfilled with earth, the recessed groove part of the slope surface is filled with the reinforced concrete column 6, and the appearance of the sliding surface 1 of the slope body is smooth. The backfilled earth provides a growth basis for the vegetation seeds, the vegetation grass seeds suitable for the local climate, having developed root systems, good stress resistance and capable of being artificially planted in batches are selected, and the vegetation grass seeds are sown by using the artificial sowing or spraying method, during which, the fertilizer is added to improve the seed germination rate. After the sowing construction is completed, regular maintenance is needed until the vegetation is formed to form the slope-protecting vegetation planting layer 7. The water intercepting ditch and the slope-protecting vegetation can effectively improve the ecological environment inside the slope body, regulate the underground water resources and optimize the soil conditions of acid-base imbalance, thereby significantly improving the stability of the slope soil body.

[0059] The rib-column type slope reinforcement system provided by the embodiment of the present application is used for reinforcing the slope, first, the rib-column type slope reinforcement device is fixed on the slope, and then the water intercepting ditch 9 is excavated and the slope-protecting vegetation is planted.

[0060] The process of excavating the water intercepting ditch comprises the following steps: S1, line positioning The total station instrument is used to accurately mark the center line position of the ditch in the range of about 3 to 5 meters away from the rear of the slope top. In the marking process, if the terrain has undulating changes, the ladder type connection mode is adopted to ensure the continuity and accuracy of the center line of the ditch.

[0061] S2, excavating the ditch The water ditch section can be excavated into a trapezoidal or rectangular shape by using the excavating machinery, the longitudinal slope of the ditch bottom is not less than 0.3%, the water intercepting ditch after excavation needs to be treated for seepage prevention, and the mortar strength grade of the cross section is not less than M7.5. The accumulated water is guided away from the sliding surface 1 of the slope body.

[0062] The process of planting the slope-protecting vegetation comprises the following steps: Vegetation protection pads 8 and slope vegetation 10 should be laid between the crest ditch 9 and the edge of the slope top, and the seeds of the slope vegetation 10 are provided with a growth base through the vegetation protection pads 8. In this embodiment, vegetation suitable for the local climate, with developed root system, strong stress resistance and capable of being artificially planted in batches, such as grass seeds, is selected, and corresponding protection measures are taken. In the slope area, turf capable of rapid greening and grass species with short stems and lush leaves and drought resistance can be selected to form a slope vegetation planting layer 7. When spraying and planting, vegetation mixture should be used, including vegetation soil, soil stabilizer, cement, fertilizer, mixed grass seeds and water. The mix proportion needs to be determined according to the slope ratio, geological conditions and local climate conditions, and the amount of mixed grass seeds should not be less than 25 kg; spraying and planting should not be carried out when the air temperature is lower than 12℃. After laying vegetation, watering, fertilizing and other maintenance and management should be carried out in a timely manner to ensure that the plant survival rate reaches more than 90%. The maintenance water should not contain oil, acid, alkali, salt and other components that hinder the growth of grass and trees. After the root system of the vegetation reaches a certain length, it can form an integral part with the slope body, effectively resist the erosion of underground water, and repair the ecological environment.

[0063] The rib-column type slope reinforcement system provided in the embodiment of the present application uses GFRP anchor rods with stronger corrosion resistance to replace traditional anchor rods, prolonging the service life of the anchor rods. The anchor device made of GFRP material effectively solves the problem that GFRP anchor rods cannot be bent and anchored and welded like traditional steel anchor rods. This component significantly increases the contact area between the anchoring member and the reinforced concrete column, thereby enhancing the anchoring force and effectively preventing internal deformation of the slope body caused by uneven distribution of the anchoring force. In addition, this construction technology is simple and easy to implement, which helps to reduce costs and increase efficiency. By excavating a crest ditch on the slope top around the slope sliding surface and planting aquatic plants that are suitable for the local climate, have developed root systems, strong stress resistance and are easy to artificially plant in batches in the empty area on the slope top, this measure helps to effectively guide excess rainwater in areas with high rainfall and prevent direct rainfall from eroding the slope sliding surface, thereby reducing soil erosion and landslide risk.

[0064] Although the specific embodiments of the present application are described above in combination with the drawings, they are not a limitation on the scope of protection of the present application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A rib column type slope reinforcement device, characterized in that: include: reinforced concrete columns, reinforcement cages, and anchors; The steel cage is set in the reinforced concrete column; the anchor rod includes an anchor rod body, an anchor and a centering device; the centering device is sleeved on the anchor rod body, and the anchor head end of the anchor rod body extends into the steel cage and is connected to the anchor inside the steel cage; the anchor head and anchor of the anchor rod body are cast together with the reinforced concrete column; The anchor includes a load distribution tray and a pre-tightening coupling nut; the load distribution tray is nested on the anchor rod body, and the pre-tightening coupling nut is threadedly connected to the anchor rod body; one end of the load distribution tray abuts the steel cage; the other end of the load distribution tray is connected to the pre-tightening coupling nut.

2. A rib column type slope reinforcement device according to claim 1, characterized in that: Multiple anchor rods are arranged along the length of the steel cage.

3. The rib column type slope reinforcement device according to claim 1, characterized in that: The load dispersing tray includes an upper ring, a lower ring and a connecting rod; the upper ring and the lower ring are coaxially arranged and fixedly connected to each other by a connecting rod; the upper ring is threadedly connected to the anchor rod body; the outer diameter of the lower ring is larger than the spacing between the steel bars in the steel cage; the pre-tightening coupling nut is clamped with the upper ring.

4. A rib column type slope reinforcement device according to claim 3, characterized in that: The upper ring and the lower ring are spaced apart by a set distance in the axial direction.

5. The rib column type slope reinforcement device according to claim 1, characterized in that: The pre-tightening coupling nut includes a connected nut body and a clamping joint; the nut body and the clamping joint are coaxially arranged; the nut body is threadedly connected to the anchor rod body, and the clamping joint includes multiple claws, which are evenly distributed along the circumference of the nut body; and adjacent claws are spaced a set distance apart.

6. The rib column type slope reinforcement device according to claim 1, characterized in that: A plurality of centering devices are arranged on the anchor rod body, and the centering devices are threadedly connected to the anchor rod body.

7. The rib column type slope reinforcement device according to claim 1, characterized in that: The centering device includes a connecting column, a flange and a reinforcing rib; the connecting column is connected to the anchor rod body; one end of the connecting column is connected to the flange, and the reinforcing rib is connected between the connecting column and the flange.

8. The rib column type slope reinforcement device according to claim 7, characterized in that: A plurality of open slots are evenly distributed along the circumference of the flange.

9. A rib column slope reinforcement system, characterized in that: A rib-column slope reinforcement device comprising any one of claims 1 to 8; A ribbed column type slope reinforcement device has anchor rods extending into the slope; a ribbed column type slope reinforcement device has a steel cage leaning against a slope sliding surface; and a ribbed column type slope reinforcement device has reinforced concrete columns cast together with the slope sliding surface.

10. The rib-column slope reinforcement system according to claim 9, characterized in that: It also includes a slope protection vegetation planting layer, a vegetation protection mat, an intercepting ditch and slope protection vegetation; the intercepting ditch is located at the top of the slope; a vegetation protection mat and slope protection vegetation are set between the intercepting ditch and the top edge of the slope; and a slope protection vegetation planting layer is set on the sliding surface of the slope.

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