Railway slope anchor rod reinforcing system and construction method

Abstract

The invention relates to a railway slope protection technology, and provides a railway slope anchor rod reinforcing system and a construction method in order to solve the problems that an existing railway slope protection net is poor in stability and reliability and the like, the railway slope anchor rod reinforcing system comprises a plurality of reinforcing assemblies and a plurality of I-shaped connecting beams which are distributed on a construction face, and each reinforcing assembly comprises an anchor rod and a cross-shaped frame beam; one end of the anchor rod is inserted into the anchor rod hole, and the other end extends outwards along an orifice of the anchor rod hole; an anchor rod mounting hole is formed in the center of the cross-shaped frame beam, and the extension section of the anchor rod penetrates through the anchor rod mounting hole and then is connected with the cross-shaped frame beam through a nut; transverse beams and longitudinal beams of the cross-shaped frame beams are I-shaped beams, and the transverse beams of every two adjacent cross-shaped frame beams are fixedly connected through an I-shaped connecting beam. The longitudinal beams of every two adjacent cross-shaped frame beams are fixedly connected through an I-shaped connecting beam, and the cross-shaped frame beams of the multiple sets of reinforcing assemblies are connected into a whole to form a reinforcing frame.

Description

TECHNICAL FIELD

[0001] The present application relates to railway slope protection technology, in particular to a railway slope anchor rod reinforcing system and construction method. BACKGROUND

[0002] Railway slope protection is an important link to ensure the stability of railway subgrade, and the terrain along the railway is complex. The slope is easily affected by rainwater erosion, weathering and erosion or train vibration, and prone to problems such as landslides and collapses, which directly threatens the safety of train operation.

[0003] The existing railway slope protection measures mainly use slope protection nets for protection. The slope protection net can be divided into two forms: active slope protection net and passive slope protection net.

[0004] The active slope protection net is a kind of flexible net covered on the slope or rock to be protected, mainly using steel wire rope net, to control the movement range of falling rocks caused by weathering and peeling of slope rock and soil, and is only suitable for the protection of relatively stable large rock mass slope.

[0005] The passive slope protection net is formed by connecting and combining steel wire rope net, ring net, pressure reducing ring and steel column to form a whole, and forms a surface protection for the protected area. It is suitable for the protection of rock mass slope with small and scattered rock blocks, but it is greatly affected by the lithology, geological conditions, hydrological conditions, slope and environmental factors of the slope, and cannot meet the requirements of high strength and high stability of the slope protection. Therefore, a more applicable and stable slope protection system is needed to improve the effectiveness and reliability of slope protection and protect the stability of railway subgrade. SUMMARY

[0006] The purpose of the present application is to solve the technical problems of poor stability and reliability of the existing railway slope protection net, limited application range and other technical problems, and to propose a railway slope anchor rod reinforcing system and construction method.

[0007] To achieve the above purpose, the technical solution proposed by the present application is as follows:

[0008] A railway slope anchor rod reinforcing system, characterized in that it comprises a plurality of reinforcing components distributed on the construction surface and a plurality of I-shaped connecting beams.

[0009] The reinforcing component comprises an anchor rod and a cross frame beam.

[0010] One end of the anchor rod is inserted into the anchor rod hole of the railway slope and fixedly connected with the anchor rod hole through cement slurry. The other end of the anchor rod extends outward along the hole opening of the anchor rod hole.

[0011] Anchoring rod installation holes are formed at the center of the cross frame beam, and the extension section of the anchoring rod is connected to the cross frame beam through a nut after passing through the anchoring rod installation hole;

[0012] The cross steel frame beam comprises cross-connected horizontal beams and vertical beams, and the horizontal beams and the vertical beams are all I-shaped beams;

[0013] The anchoring rod installation hole is arranged at the connection position of the horizontal beam and the vertical beam; the horizontal beam is connected to the horizontal beam of the adjacent reinforcing assembly through an I-shaped connecting beam, and the vertical beam is connected to the vertical beam of the adjacent reinforcing assembly through an I-shaped connecting beam;

[0014] The cross frame beams of the multiple groups of reinforcing assemblies are connected to each other through I-shaped connecting beams to form a reinforcing frame.

[0015] Further, a drainage hole is formed in the I-shaped connecting beam.

[0016] Further, a grout stopper is arranged at the hole opening of the anchoring rod hole;

[0017] A mounting pad plate is further arranged between the nut and the cross frame beam.

[0018] Further, the anchoring rod comprises multiple steel bars connected in sequence, and the end faces of the adjacent two steel bars are fixedly connected through a threaded sleeve;

[0019] A steel bar positioner is arranged at a position spaced apart by a certain distance along the axial direction of the anchoring rod.

[0020] Further, the length of the anchoring rod is 8-15 m, and the length of the anchoring rod can be adjusted according to design requirements;

[0021] The length of the part of the anchoring rod extending out of the hole opening of the anchoring rod hole is 10 cm-15 cm;

[0022] A steel bar positioner is arranged at a position spaced apart by 2 m along the axial direction of the anchoring rod.

[0023] Further, the horizontal beam comprises a horizontal upper flange plate and a horizontal lower flange plate, and a horizontal web plate is arranged between the horizontal upper flange plate and the horizontal lower flange plate;

[0024] The vertical beam comprises a vertical upper flange plate and a vertical lower flange plate, and a vertical web plate is arranged between the vertical upper flange plate and the vertical lower flange plate;

[0025] The horizontal web plate and the I-shaped connecting beam are fixedly connected through a connecting plate;

[0026] The vertical web plate and the I-shaped connecting beam are fixedly connected through a connecting plate;

[0027] The I-shaped connecting beam is an I-shaped connecting steel beam;

[0028] The cross frame beam is a cross steel frame beam.

[0029] Meanwhile, the application further provides a railway slope anchor rod reinforcing construction method, which adopts the railway slope anchor rod reinforcing system, and has the speciality that comprises the following steps:

[0030] S1, a construction platform is built, and anchor rod hole positions are marked on corresponding positions on a construction surface according to design requirements;

[0031] S2, according to the marked anchor rod hole positions, a drill is used to drill the anchor rod holes required by the design on the construction surface, and the anchor rod holes are cleaned to remove the inner wall impurities of the anchor rod holes;

[0032] S3, one end of each anchor rod is inserted into the corresponding anchor rod hole, and the other end of the anchor rod extends out of the anchor rod hole, a grouting device is used to inject cement slurry into each anchor rod hole, so that the anchor rod is fixed in the anchor rod hole;

[0033] S4, after the cement slurry reaches a certain strength, the extension end of each anchor rod passes through the corresponding anchor rod mounting hole and is fixedly connected with the corresponding cross frame beam through a nut;

[0034] S5, the horizontal beams of two adjacent cross frame beams are fixedly connected through the I-shaped connecting beams, the vertical beams of two adjacent cross frame beams are fixedly connected through the I-shaped connecting beams, the cross frame beams of the multiple reinforcing assemblies are connected with each other to form a reinforcing frame, so that the reinforcement of the railway slope is completed.

[0035] Further, in step S1, the horizontal distance between the two adjacent anchor rod hole positions is 2.5±0.1m, and the vertical distance is 2.0±0.2m.

[0036] Further, step S2 is specifically:

[0037] S2.1, according to the marked anchor rod hole positions, dry drilling is performed on the construction surface through a drill to drill the anchor rod holes required by the design, wherein each anchor rod hole satisfies:

[0038] 100mm≤hole diameter≤120mm, -20mm≤hole opening deviation≤20mm, 200mm≤hole depth deviation≤500mm, -1°≤hole inclination deviation≤1°, -2°≤hole azimuth deviation≤2°;

[0039] S2.2, the anchor rod holes are cleaned through high-pressure air to remove the inner wall impurities of the anchor rod holes;

[0040] S2.3, the hole diameter, the hole, the hole depth, the hole inclination and the hole azimuth of each anchor rod hole are measured, whether the anchor rod hole meets the design requirement is verified, if not, the anchor rod hole is adjusted until it meets the design requirement, if yes, step S3 is executed.

[0041] Further, in step S3, the grouting pressure of the grouting device is 0.2-0.3Mpa.

[0042] In step S4, the strength of the cement grout is not less than 30Mpa.

[0043] The beneficial effects of the present application are:

[0044] 【1】The railway slope anchor rod reinforcing system has the advantages of simple structure, easy disassembly and maintenance, low cost, high protection strength, effective improvement of the stability and reliability of railway slope protection, guarantee of the stability of railway subgrade, high practicability and applicability, applicability to different slope lithology, geological conditions, hydrological conditions and slope protection, and effective improvement of the safety performance of railway slope protection.

[0045] 【2】The present application protects different slope structures by different anchor rod hole depths and anchor rod lengths, effectively protects the integrity of the slope rock mass, and improves the use flexibility of the reinforcing system.

[0046] 【3】The present application sets a drainage hole on the I-shaped connecting beam, so that water can be discharged from the reinforcing system in time, avoiding the corrosion of rainwater on the reinforcing system, prolonging the service life of the reinforcing system, and effectively improving the protection performance and safety performance of the slope anchor rod reinforcing system.

[0047] 【4】The railway slope anchor rod reinforcing construction method has the advantages of simple implementation, easy operation, fixing of the reinforcing assembly on the construction surface according to the marked anchor rod hole position, mutual connection between the cross frame beams of multiple reinforcing assemblies to form a reinforcing frame, effective protection of the railway slope, fixing of different rock surfaces by designing reasonable anchor rod hole depth and anchor rod length, adaptation to local conditions, and effective improvement of the applicability and protection performance of the reinforcing assembly. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a cross-sectional structure diagram of an embodiment of the present application railway slope anchor rod reinforcing system.

[0049] Figure 2 It is a connection diagram of part of the reinforcing assembly in the embodiment of the present application.

[0050] Figure 3 It is a connection diagram of the cross frame beam and the I-shaped connecting beam in the embodiment of the present application.

[0051] Figure label:

[0052] 1-Anchor bolt hole, 2-Anchor bolt, 3-Cross frame beam, 4-Anchor bolt installation hole, 5-Transverse beam, 6-Longitudinal beam, 7-Transverse upper edge plate, 8-Transverse lower edge plate, 9-Transverse web plate, 10-I-beam connecting beam, 11-Longitudinal upper edge plate, 12-Longitudinal lower edge plate, 13-Longitudinal web plate, 14-Drainage hole, 15-Connecting plate. Detailed Implementation

[0053] A railway slope anchor reinforcement system, such as Figure 1 As shown, it includes multiple sets of reinforcement components distributed on the construction surface and multiple I-beam connecting beams, such as Figure 2 As shown, the reinforcement assembly includes anchor rod 2 and cross frame beam 3; anchor rod 2 includes multiple steel bars connected in sequence, and the end faces of two adjacent steel bars are fixedly connected by threaded sleeves; the length of anchor rod 2 is 8 to 15m, and the length of anchor rod 2 can be adjusted according to design requirements; steel bar locators are set at 2m intervals along the axial direction of anchor rod 2.

[0054] One end of the anchor rod 2 is inserted into the anchor hole 1 of the railway slope and fixedly connected to the anchor hole 1 with cement grout; the other end of the anchor rod 2 extends outward along the opening of the anchor hole 1, with the length of the portion of the anchor rod 2 extending out of the opening of the anchor hole 1 being 10cm to 15cm; a grout stop plug is also installed at the opening of the anchor hole 1; an anchor installation hole 4 is opened at the center of the cross frame beam 3, and the extended section of the anchor rod 2 passes through the anchor installation hole 4 and is connected to the cross frame beam 3 with a nut; Figure 3 As shown, the cross steel frame beam 3 includes a cross-connected transverse beam 5 and a longitudinal beam 6. Both the transverse beam 5 and the longitudinal beam 6 are I-beams. Anchor bolt mounting holes 4 are set at the connection positions of the transverse beam 5 and the longitudinal beam 6. The transverse beam 5 is connected to the transverse beam 5 of the adjacent reinforcement component through the I-beam connecting beam 10, and the longitudinal beam 6 is connected to the longitudinal beam 6 of the adjacent reinforcement component through the I-beam connecting beam 10.

[0055] The transverse beam 5 includes a transverse upper edge plate 7 and a transverse lower edge plate 8. A transverse web plate 9 is provided between the transverse upper edge plate 7 and the transverse lower edge plate 8. The transverse web plates 9 of two adjacent cross-frame beams 3 are fixedly connected by I-beam connecting beams 10. The transverse web plate 9 and the I-beam connecting beam 10 are fixedly connected by connecting plates 15.

[0056] The longitudinal beam 6 comprises a longitudinal upper edge plate 11 and a longitudinal lower edge plate 12, and a longitudinal web plate 13 is arranged between the longitudinal upper edge plate 11 and the longitudinal lower edge plate 12, the longitudinal web plates 13 of two adjacent cross frame beams 3 are fixedly connected through the I-shaped connecting beams 10, the longitudinal web plates 13 and the I-shaped connecting beams 10 are fixedly connected through the connecting plates 15, and the cross frame beams 3 of the multiple groups of reinforcing assemblies are connected to each other through the I-shaped connecting beams 10 to form a reinforcing frame; the middle part of the longitudinal web plate 13 close to the side of the longitudinal lower edge plate 12 and the middle part of the I-shaped connecting beam 10 are both provided with a drainage hole 14, wherein the I-shaped connecting beam 10 is an I-shaped connecting steel beam, and the cross frame beam 3 is a cross steel frame beam.

[0057] Meanwhile, the embodiment also proposes a railway slope anchor rod reinforcing construction method, which adopts the railway slope anchor rod reinforcing system and comprises the following steps:

[0058] S1, a construction platform is built, anchor rod hole 1 positions are marked on the corresponding positions on the construction surface according to design requirements, the horizontal distance between adjacent two anchor rod hole 1 positions is 2.5±0.1 m, and the vertical distance is 2.0±0.2 m;

[0059] S2, according to the marked anchor rod hole 1 positions, a drill machine is used to drill the anchor rod holes 1 required by the design on the construction surface, and the anchor rod holes 1 are cleaned to remove the impurities on the inner walls of the anchor rod holes 1;

[0060] S2.1, according to the marked anchor rod hole 1 positions, a drill machine is used to dry drill the anchor rod holes 1 required by the design on the construction surface, wherein each anchor rod hole 1 satisfies:

[0061] 100 mm≤hole diameter≤120 mm, -20 mm≤hole opening deviation≤20 mm, 200 mm≤hole depth deviation≤500 mm, -1°≤hole inclination deviation≤1°, and -2°≤hole azimuth deviation≤2°;

[0062] S2.2, the anchor rod holes 1 are cleaned by high-pressure air to remove the impurities on the inner walls of the anchor rod holes 1;

[0063] S2.3, the hole diameter, hole opening, hole depth, hole inclination and hole azimuth of each anchor rod hole 1 are measured to verify whether the anchor rod hole 1 satisfies the design requirements, if not, the anchor rod hole 1 is adjusted until it satisfies the design requirements, and if yes, step S3 is performed;

[0064] S3, one end of the anchor rod 2 is inserted into each anchor rod hole 1, the other end of the anchor rod 2 extends out of the anchor rod hole 1, a grouting device is used to inject cement slurry into each anchor rod hole 1, so that the anchor rod 2 is fixed in the anchor rod hole 1, and the grouting pressure of the grouting device is 0.2-0.3 Mpa;

[0065] S4, after the cement paste reaches a certain strength, the extension end of each anchor rod 2 passes through the anchor rod installation hole 4 and is fixedly connected with the cross frame beam 3 through a nut, and the strength of the cement paste is not less than 30Mpa;

[0066] S5, the transverse beams 5 of the adjacent two cross frame beams 3 are fixedly connected through the I-shaped connecting beams 10, the longitudinal beams 6 of the adjacent two cross frame beams 3 are fixedly connected through the I-shaped connecting beams 10, the cross frame beams 3 of the multiple groups of reinforcing assemblies are connected with each other to form a reinforcing frame, so that the reinforcement of the railway slope is completed.

Claims

1. A railway slope anchor reinforcement system, characterized in that: This includes multiple sets of reinforcement components distributed on the construction surface and multiple I-beam connecting beams (10); The reinforcement components include anchor bolts (2) and cross-shaped frame beams (3); One end of the anchor rod (2) is inserted into the anchor hole (1) of the railway slope and is fixedly connected to the anchor hole (1) by cement grout; the other end of the anchor rod (2) extends outward along the opening of the anchor hole (1); An anchor bolt mounting hole (4) is provided at the center of the cross frame beam (3). The extension of the anchor bolt (2) passes through the anchor bolt mounting hole (4) and is connected to the cross frame beam (3) by a nut. The cross-shaped steel frame beam (3) includes a cross-connected transverse beam (5) and a longitudinal beam (6), both of which are I-beams; The anchor mounting hole (4) is set at the connection position of the transverse beam (5) and the longitudinal beam (6); the transverse beam (5) is connected to the transverse beam (5) of the adjacent reinforcement component through the I-beam connecting beam (10), and the longitudinal beam (6) is connected to the longitudinal beam (6) of the adjacent reinforcement component through the I-beam connecting beam (10). The cross-shaped frame beams (3) of the multiple sets of reinforcement components are connected to each other by I-beam connecting beams (10) to form a reinforced frame.

2. The railway slope anchor reinforcement system according to claim 1, characterized in that: The I-beam connecting beam (10) is provided with drainage holes (14).

3. The railway slope anchor reinforcement system according to claim 2, characterized in that: A grout stopper is also provided at the opening of the anchor bolt hole (1); It also includes a mounting pad, which is disposed between the nut and the cross frame beam (3).

4. The railway slope anchor reinforcement system according to claim 3, characterized in that: The anchor rod (2) includes multiple steel bars connected in sequence, and the end faces of two adjacent steel bars are fixedly connected by a threaded sleeve; Rebar locators are installed at intervals along the axial direction of the anchor rod (2).

5. The railway slope anchor reinforcement system according to claim 4, characterized in that: The length of the anchor rod (2) is 8 to 15 m, and the length of the anchor rod (2) can be adjusted according to design requirements; The length of the portion of the anchor rod (2) extending out of the opening of the anchor rod hole (1) is 10cm to 15cm; A rebar locator is installed at a distance of 2m along the axial direction of the anchor rod (2).

6. The railway slope anchor reinforcement system according to claim 5, characterized in that: The transverse beam (5) includes a transverse upper edge plate (7) and a transverse lower edge plate (8), and a transverse web plate (9) is provided between the transverse upper edge plate (7) and the transverse lower edge plate (8); The longitudinal beam (6) includes a longitudinal upper edge plate (11) and a longitudinal lower edge plate (12), and a longitudinal web plate (13) is provided between the longitudinal upper edge plate (11) and the longitudinal lower edge plate (12); The transverse web (9) and the I-beam (10) are fixedly connected by a connecting plate (15); The longitudinal web (13) and the I-beam (10) are fixedly connected by a connecting plate (15); The I-beam connecting beam (10) is an I-beam connecting steel beam; The cross-shaped frame beam (3) is a cross-shaped steel frame beam.

7. A method for reinforcing railway slopes with anchor bolts, employing the railway slope anchor bolt reinforcement system described in any one of claims 1-6, characterized in that... Includes the following steps: S1. Build a construction platform and mark the anchor bolt hole positions on the construction surface according to the design requirements; S2. According to the marked anchor bolt hole positions, drill the anchor bolt holes (1) required by the design on the construction surface using a drilling rig, and clean the anchor bolt holes (1) to remove impurities from the inner wall of the anchor bolt holes (1); S3. Insert one end of the anchor rod (2) into each anchor rod hole (1) and extend the other end out of the anchor rod hole (1). Inject cement grout into each anchor rod hole (1) through the grouting device to fix the anchor rod (2) in the anchor rod hole (1). S4. After the cement grout reaches a certain strength, the extension ends of each anchor rod (2) are passed through the corresponding anchor rod installation holes (4) and fixedly connected to the corresponding cross frame beam (3) with nuts. S5. The transverse beams (5) of two adjacent cross frame beams (3) are fixedly connected by the I-beam connecting beam (10), and the longitudinal beams (6) of two adjacent cross frame beams (3) are fixedly connected by the I-beam connecting beam (10). The cross frame beams (3) of multiple sets of reinforcement components are connected to each other to form a reinforcement frame, thereby completing the reinforcement of the railway slope.

8. The railway slope anchor reinforcement construction method according to claim 7, characterized in that: In step S1, the lateral spacing between two adjacent anchor bolt holes is 2.5±0.1m and the vertical spacing is 2.0±0.2m.

9. The railway slope anchor reinforcement construction method according to claim 8, characterized in that, Step S2 is as follows: S2.1 According to the marked anchor bolt hole positions, dry drilling is carried out on the construction surface using a drilling rig to drill the anchor bolt holes (1) as required by the design, wherein each anchor bolt hole (1) satisfies: 100mm≤hole diameter≤120mm, -20mm≤hole opening deviation≤20mm, 200mm≤hole depth deviation≤500mm, -1°≤hole inclination angle deviation≤1°, -2°≤hole orientation deviation≤2°; S2.2 Clean the anchor bolt hole (1) with high-pressure air to remove impurities from the inner wall of the anchor bolt hole (1); S2.

3. Measure the diameter, opening, depth, inclination angle and orientation of each anchor hole (1) to verify whether the anchor hole (1) meets the design requirements. If it does not meet the requirements, adjust the anchor hole (1) until it meets the design requirements. If it does meet the requirements, proceed to step S3.

10. The railway slope anchor reinforcement construction method according to claim 9, characterized in that: In step S3, the grouting pressure of the grouting device is 0.2 to 0.3 MPa; In step S4, the strength of the cement slurry is not less than 30 MPa.

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