Assembled guardrail for secondary excavation of existing slope and construction method

Abstract

The present application relates to the field of guardrails, and in particular to an assembled guardrail and construction method for secondary excavation of existing slopes. In the first aspect, the present application discloses an assembled guardrail for secondary excavation of existing slopes, comprising a plurality of columns and an interception net arranged between the columns, the bottom ends of the columns being pointed and inserted into the platform; and further comprising a reinforcement column, the top end of which is provided with a connecting plate, the bottom end of the reinforcement column being pointed, the reinforcement column being passed through an inclined groove and being inclined, the inclination angle of the reinforcement column being adapted to the inclined groove, the reinforcement column being inserted into the platform, and the connecting plate being fixed into the fixing groove by screws. In the second aspect, the present application discloses a construction method for an assembled guardrail for secondary excavation of existing slopes, comprising the following steps: S1, installing the columns; S2, installing the reinforcement column; S3, installing the connecting rod. The present application has the effect of effectively saving costs and simplifying the construction method while achieving step-by-step protection.

Description

Technical Field

[0001] The present application relates to the field of guardrails, and in particular to an assembled guardrail for secondary excavation of an existing slope and a construction method. Background Art

[0002] With the development of my country's socioeconomic landscape, a large number of projects have emerged, including the expansion of expressways and the upgrading and reconstruction of national and provincial highways. In road expansion plans, the secondary excavation of extensive slopes along the roads and the maintenance of road traffic safety during construction have become urgent challenges in engineering construction.

[0003] In the related art, a protective net is installed on the side of the road to protect against massive objects rolling down the slope. However, during the secondary excavation of the slope, construction starts from the top of the slope and the excavation is carried out step by step downwards. As the massive objects roll down from the top, their kinetic energy gradually increases. When the massive objects roll to the foot of the slope, the protective net is easily unable to intercept them and they pass over the protective net, causing the massive objects to invade the road surface, posing a safety hazard to vehicles and pedestrians on the road. Therefore, a method of installing guardrails step by step on the slope is adopted to promptly intercept falling rocks near the excavation point. The guardrails include multiple columns and interception nets arranged between the columns. Multiple platforms are provided on the outer surface of the slope along the height direction of the slope. Concrete blocks are pre-embedded in the platforms. The top surface of the concrete blocks is exposed on the platforms and has mounting holes. The guardrails are installed on each platform by pouring the bottom of the columns into the mounting holes. However, installing guardrails on each platform consumes a lot of material resources, resulting in increased costs. Summary of the Invention

[0004] In order to achieve step-by-step protection while effectively saving costs, the present application provides an assembled guardrail and construction method for secondary excavation of an existing slope.

[0005] In the first aspect, the present application provides an assembled guardrail for secondary excavation of an existing slope, which adopts the following technical solution:

[0006] An assembled guardrail for secondary excavation of an existing slope, comprising a plurality of upright posts and an interception net disposed between the upright posts, wherein the bottom ends of the upright posts are pointed and inserted into a platform, and mounting plates are disposed on the side walls of the upright posts, wherein the mounting plates are located above the platform, and wherein a chute and a fixed groove are interconnected on the top surface of the mounting plates, wherein the fixed groove is located above the chute and has an opening larger than that of the chute.

[0007] It also includes a reinforcement column, the top of which is provided with a connecting plate, the bottom of which is pointed, the reinforcement column is passed through the inclined groove and is inclined, the inclination angle of the reinforcement column is adapted to the inclined groove, the reinforcement column is inserted into the platform, and the connecting plate is fixed in the fixing groove by screws.

[0008] By adopting the above technical solution, when installing the guardrail, the columns are first driven into the platform, the interception net is in the open position, and the reinforcement columns are then driven into the platform. Because the columns are inserted into the platform and the reinforcement columns are inserted into the platform at an angle, the columns and reinforcement columns can fix and reinforce the installation of the guardrail, improving the stability of the guardrail installation.

[0009] After the excavation of the upper slope is completed, the fallen rocks intercepted by the guardrail are cleared, and then the reinforcement column and the column are pulled out in sequence. After the column is rotated to reel in the interception net, it is moved to the lower platform of the next level, the interception net is unfolded and the above installation steps are repeated to install the guardrail. Through the setting of this application, the guardrail is easy to disassemble and assemble, and the installation is highly stable. It is not necessary to install guardrails on multiple platforms. It only needs to be disassembled and moved level by level, which effectively saves costs while achieving step-by-step protection.

[0010] Optionally, the column includes an energy absorbing section and a fixed section, the energy absorbing section is located above the fixed section, and the interception net is connected to the energy absorbing section; and the energy absorbing section can slide relative to the fixed section along the thickness direction of the column; the column has an initial state and a sliding state, when the column is in the initial state, the energy absorbing section and the fixed section are coaxially arranged, and when the column is in the sliding state, the energy absorbing section and the fixed section are staggered;

[0011] The column is further provided with a fixing member and a reset spring, wherein the fixing member is used to fix the column in an initial state, and the reset spring is used to automatically reset the column in a sliding state to the initial state.

[0012] By adopting the above technical solution, when in use, the fixed section is inserted into the platform. Since falling rocks have a large kinetic energy when hitting the interception net, it is easy to damage the interception net. Therefore, the present application adopts the energy-absorbing section that can slide relative to the fixed section and the arrangement of the return spring. When the falling rock hits the interception net, the energy-absorbing section is driven to slide relative to the fixed section, and the return spring is extended. The return spring returns to its natural state and offsets part of the kinetic energy generated by the falling rock, thereby absorbing energy and reducing the possibility of damage to the interception net.

[0013] Optionally, a spring groove is provided at the top of the side surface of the fixed section, and the spring groove passes through the top surface of the fixed section. One end of the bottom surface of the energy absorbing section is fixedly connected to a baffle, and the baffle is located at the opening of the side surface of the spring groove and is adapted to the spring groove. The return spring is located in the spring groove, and one end of the return spring is connected to the inner wall of the spring groove, and the other end of the return spring is connected to the baffle.

[0014] By adopting the above technical solution, the installation of the reset spring is realized. The reset spring is located inside the column, which protects the reset spring and improves the overall flatness and aesthetics of the column.

[0015] Optionally, a first dovetail block is fixedly connected to the bottom surface of the baffle, and a first dovetail groove for sliding the first dovetail block is provided on the side wall of the fixed section, and the first dovetail groove is located below the spring groove and is connected to the spring groove; a second dovetail block is fixedly connected to the bottom surface of the energy absorbing section, and a second dovetail groove for sliding the second dovetail block is provided on the top surface of the fixed section, one end of the second dovetail groove passes through the side wall of the fixed section away from the baffle, and the other end of the second dovetail groove is connected to the spring groove. When the column is in the initial state, the second dovetail block is located adjacent to the spring groove.

[0016] The adoption of the above technical solution helps to improve the sliding stability of the energy absorbing section relative to the fixed section.

[0017] Optionally, both ends of the return spring are fixedly connected to connecting blocks, a first connecting groove is formed on an inner wall of the spring groove opposite to the baffle, a second connecting groove is formed on a side wall of the baffle close to the inside of the spring groove, and an observation slot is formed on a side wall of the second connecting slot away from the first connecting slot, and the size of the observation slot is smaller than that of the second connecting slot;

[0018] The connecting block at one end of the return spring is embedded in the first connecting groove and fixed by a screw, and the connecting block at the other end of the return spring is embedded in the second connecting groove.

[0019] By adopting the above technical solution, when connecting the fixed section and the energy absorbing section and installing the return spring, the connecting block at one end of the return spring is first embedded in the first connecting groove and fixed with a screw so that the return spring is located in the spring groove. Then, the first dovetail block is aligned with the opening of the first connecting groove located on the side wall of the column, and the second dovetail block is aligned with the end of the second connecting groove that is connected to the spring groove. At this time, the connecting block at the other end of the return spring is embedded in the second connecting groove, and it can be observed through the through groove whether the connecting block at the other end of the return spring is aligned with the second connecting groove. The connection of the fixed section and the energy absorbing section and the installation of the return spring are completed in one step, which is simple and convenient to operate. After the return spring has been used for a long time, it is also easy to replace the return spring.

[0020] Optionally, a first limiting groove is provided on the top surface of the column, the first limiting groove penetrates the energy absorbing section along the height direction of the energy absorbing section, and a second limiting groove is provided on the top surface of the fixed section, the second limiting groove is connected to the second dovetail groove;

[0021] The fixing part is a connecting rod. When the column is in the initial state, the first limiting groove and the second limiting groove are connected and coaxially arranged, and the connecting rod is simultaneously passed through the first limiting groove and the second limiting groove; the top surface of the column is also provided with a blocking hole, the blocking hole is connected to the first limiting groove and the opening of the blocking hole is larger than the opening of the first connecting groove, a sealing plug is threadedly connected to the blocking hole, the top surface of the sealing plug is flush with the top surface of the column, and the bottom surface of the sealing plug abuts against the top end of the connecting rod.

[0022] By adopting the above technical solution, when the column is driven into the platform, the column is in the initial state. At this time, the connecting rod limits and fixes the energy absorbing section and the fixed section in the thickness direction, and the first dovetail block and the first dovetail groove, the second dovetail block and the second dovetail groove limit and fix the column in the vertical direction, so that the column is a stable whole, which is convenient for driving the fixed section of the column into the platform.

[0023] After the fixed section is driven into the platform, the sealing plug is unscrewed and the connecting rod is taken out, thereby releasing the limitation and fixation of the fixed section and the energy-absorbing section in the thickness direction of the column, so that the energy-absorbing section can slide relative to the fixed section to absorb energy when impacted by falling rocks. The structure is simple, and the fixing and releasing operations are simple and convenient.

[0024] Optionally, an installation space is provided in the fixed section, the installation space is located below the second limiting groove and is connected to the second limiting groove through a threading channel, the top end of the connecting rod is pointed, and a hand-held through hole is provided on the side wall of the pointed top end of the connecting rod, the bottom end of the connecting rod is fixedly connected to a connecting rope, a winding mechanism is provided in the installation space, and the end of the connecting rope away from the connecting rod is connected to the winding mechanism and is wound and released through the winding mechanism;

[0025] When the upright is in the initial state, the connecting rod is inserted into the first limiting groove and the second limiting groove, and the connecting rope is reeled in by the reeling mechanism;

[0026] When the column needs to transition from the initial state to the sliding state, the sealing plug is opened, the connecting rod is taken out from the first limiting groove and the second limiting groove and inserted into the inclined surface of the slope, and the connecting rope is lengthened by the winding mechanism.

[0027] By adopting the above technical solution, after the sealing plug is opened, the setting of the handheld through hole makes it convenient for the staff to remove the connecting rod from the first connecting groove and the second connecting groove. After the connecting rod is taken out, it is inserted into the inclined surface of the slope. The connecting rod not only plays the role of limiting the energy absorption section and the fixing section, but also cooperates with the column and the connecting rope. The three form a stable triangular structure, which further improves the stability of the guardrail installation.

[0028] Optionally, the winding mechanism includes a coil spring and a fixed shaft, the width of the coil spring is adapted to the width of the installation space, the inner end of the coil spring is fixedly connected to the fixed shaft, the two ends of the fixed shaft are fixed to two opposite inner side walls of the installation space, and the end of the connecting rope away from the connecting rod is fixed to the outer end of the coil spring;

[0029] When the upright is in the initial state, the coil spring is in a natural state, and the connecting rope is wound around the coil spring for winding;

[0030] When the column needs to transition from the initial state to the sliding state, the connecting rope is lengthened by contracting the coil spring. After the connecting rod is inserted into the slope, the coil spring can continue to contract, and part of the connecting rope is still wrapped around the coil spring.

[0031] By adopting the above technical solution, when the column is in its initial state, the coil spring is in its natural state, and the connecting rope is wound around the coil spring to reel in. When the column needs to transition from the initial state to the sliding state, the connecting rope is lengthened by the coil spring contracting. After the connecting rod is inserted into the slope, the coil spring can continue to contract, and the connecting rope remains partially wrapped around the coil spring, leaving room for the energy-absorbing section to slide relative to the fixed section. Energy absorption is achieved not only by the return spring, but also by the coil spring and connecting rope working together. This improves the overall installation stability of the guardrail while further enhancing the energy absorption effect. The simple structure also makes it easy to process and install.

[0032] Optionally, a mounting groove is provided on the side of the fixed section away from the baffle, the mounting groove is connected to the mounting space, and the width of the mounting groove is greater than the width of the mounting space, and two opposite third dovetail grooves are provided on the bottom wall of the mounting groove, the third dovetail groove is connected to the mounting space, and both ends of the fixed shaft are fixedly connected with a third dovetail block, and the third dovetail block is passed through the third dovetail groove; a fixing plate is fixed in the mounting groove by screws, and two dovetail rods are fixedly connected to the surface of the fixing plate close to the mounting space, and the two dovetail rods are respectively passed through the two dovetail grooves and press the third dovetail block tightly into the third dovetail groove.

[0033] By adopting the above technical solution, when installing the coil spring, the third dovetail blocks at both ends of the coil spring are aligned with the third dovetail grooves, and the coil spring is pushed to move the coil spring into the installation space. Then, the two dovetail rods are respectively aligned with the two third dovetail grooves, and the dovetail rods are pushed into the third dovetail grooves until the dovetail rods abut against the third dovetail blocks. At this time, the fixing plate is moved into the installation groove, and then the fixing plate is fixed to the installation groove by screws to realize the installation of the coil spring. The operation is simple and convenient, and it is easy to replace the coil spring.

[0034] In a second aspect, the present application provides a construction method for an assembled guardrail for secondary excavation of an existing slope, which adopts the following technical solution:

[0035] A construction method for an assembled guardrail for secondary excavation of an existing slope, characterized by comprising the following steps:

[0036] S1. Installing the column: Place the column in its initial state, i.e., the connecting rod is inserted into the first connecting groove and the second connecting groove at the same time, and the sealing plug is threadedly connected to the sealing hole. Drive the fixed section of the column vertically into the platform, and place the mounting plate above the platform and in contact with the platform.

[0037] S2. Install the reinforcement column: drive the reinforcement column into the platform at an angle, and fix the connecting plate in the fixing groove with screws;

[0038] S3. Install the connecting rod: open the sealing plug and take the connecting rod out of the first connecting groove and the second connecting groove. At this time, the coil spring is in a reeled state, the connecting rope is lengthened, and the connecting rope passes through the first connecting groove and the second connecting groove and then around the top of the energy absorbing section to drive the connecting rod into the slope of the slope.

[0039] By adopting the above technical solution, the guardrail is easy to install and has high stability.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. The upright posts and reinforcement posts can fix and reinforce the installation of the guardrail, improving the stability of the guardrail installation. After the excavation of the upper slope is completed, the fallen rocks intercepted by the guardrail are cleaned up, and then the reinforcement posts and upright posts are pulled out in turn. After the upright posts are rotated to reel in the interception net, it is moved to the lower platform of the next level, the interception net is opened and the above installation steps are repeated to install the guardrail. The guardrail is easy to disassemble and assemble, and the installation is highly stable. It is not necessary to install guardrails on multiple platforms. It only needs to be disassembled and moved step by step. While achieving step-by-step protection, it effectively saves costs.

[0042] 2. The energy-absorbing section can slide relative to the fixed section and the return spring is set. When a rock falls onto the interception net, the energy-absorbing section is driven to slide relative to the fixed section, and the return spring is extended. The return spring returns to its natural state and offsets part of the kinetic energy generated by the rockfall, thus absorbing energy and reducing the possibility of damage to the interception net.

[0043] 3. After the connecting rod is taken out, it is inserted into the inclined surface of the slope. The connecting rod not only plays the role of limiting the energy absorption section and the fixed section, but also cooperates with the column and the connecting rope to form a stable triangular structure, which further improves the stability of the guardrail installation. Energy absorption can be achieved not only by the reset spring, but also by the coil spring and the connecting rope. While improving the overall installation stability of the guardrail, the energy absorption effect is also further improved. The structure is simple and easy to process and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the connecting rod inserted into the slope in an embodiment of the present application.

[0045] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0046] Figure 3 It is a schematic diagram used to illustrate the overall structure of the guardrail in the embodiment of the present application.

[0047] Figure 4 It is a schematic diagram used to show the internal structure of the column in the initial state in the embodiment of the present application.

[0048] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0049] Figure 6 yes Figure 4 Enlarged view of point C in the middle.

[0050] Figure 7 It is a structural schematic diagram used to illustrate the second connecting groove in an embodiment of the present application.

[0051] Figure 8 It is an exploded view used to show the winding mechanism in the embodiment of the present application.

[0052] Figure 9 It is a schematic diagram used to illustrate the connection structure between the fixed shaft and the disc spring in the embodiment of the present application.

[0053] Explanation of reference numerals: 1. Slope; 2. Column; 21. Mounting plate; 211. Inclined groove; 212. Fixing groove; 213. Reinforcement column; 214. Connecting plate; 22. Energy absorbing section; 221. Baffle; 2211. First dovetail block; 2212. Second connecting groove; 2213. Observation slot; 2214. Second dovetail block; 23. Fixing section; 231. Spring slot; 2311. First connecting groove; 232. First dovetail slot; 233. Second Dovetail groove; 234, mounting groove; 235, third dovetail groove; 24, return spring; 241, connecting block; 25, first limiting groove; 26, second limiting groove; 27, blocking hole; 271, blocking plug; 3, intercepting net; 4, platform; 5, connecting rod; 52, connecting rope; 6, installation space; 61, threading channel; 7, winding mechanism; 71, coil spring; 72, fixed shaft; 721, third dovetail block; 73, fixed plate; 731, dovetail rod. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-9 This application is described in further detail.

[0055] In the first aspect, the embodiment of the present application discloses an assembled guardrail for secondary excavation of an existing slope. Figure 1-5 The assembled guardrail for secondary excavation of an existing slope 1 includes a plurality of columns 2 and an interception net 3 disposed between the columns 2. In this embodiment, there are three columns 2, which are merely for illustration of the guardrail structure. The number of columns 2 can be set and adjusted according to actual conditions. The bottom ends of the columns 2 are pointed and inserted into the platform 4. A mounting plate 21 is fixedly connected to the side wall of the column 2. The mounting plate 21 is located above the platform 4. The top surface of the mounting plate 21 is provided with an interconnected inclined groove 211 and a fixed groove 212. The fixed groove 212 is located above the inclined groove 211 and has an opening larger than the opening of the inclined groove 211. It also includes a reinforcement column 213, the top of which is fixedly connected to a connecting plate 214, the bottom of which is pointed, the reinforcement column 213 is passed through the inclined groove 211 and is tilted, the inclination angle of the reinforcement column 213 is adapted to the inclined groove 211, the reinforcement column 213 is inserted into the platform 4, and the connecting plate 214 is fixed in the fixing groove 212 by screws.

[0056] When installing the guardrail, first drive each column 2 into the platform 4, so that the interception net 3 is in an open state, and then drive the reinforcement column 213 into the platform 4. Since the column 2 is inserted into the platform 4, and the reinforcement column 213 is inserted into the platform 4 at an angle, the column 2 and the reinforcement column 213 can fix and reinforce the installation of the guardrail, thereby improving the stability of the guardrail installation. After the excavation of the upper slope 1 is completed, the fallen rocks intercepted by the guardrail are cleaned up, and then the reinforcement column 213 and the column 2 are pulled out in turn. After the column 2 is rotated to roll up the interception net 3, it is moved to the lower platform 4 of the next level, the interception net 3 is opened and the above installation steps are repeated to install the guardrail. Through the setting of the present application, the guardrail is easy to disassemble and assemble, and the installation stability is high. It is not necessary to set up guardrails at multiple platforms 4. It is only necessary to disassemble and assemble and move the guardrail step by step. While achieving step-by-step protection, it plays an effective role in saving costs.

[0057] Reference Figure 3-5 The column 2 includes an energy-absorbing section 22 and a fixed section 23. The energy-absorbing section 22 is located above the fixed section 23. The interception net 3 is connected to the energy-absorbing section 22, and the energy-absorbing section 22 can slide relative to the fixed section 23 along the thickness direction of the column 2. The column 2 has an initial state and a sliding state. When the column 2 is in the initial state, the energy-absorbing section 22 and the fixed section 23 are coaxially arranged. When the column 2 is in the sliding state, the energy-absorbing section 22 and the fixed section 23 are offset. The column 2 is also provided with a fixing member and a return spring 24. The fixing member is used to fix the column 2 in the initial state, and the return spring 24 is used to automatically return the column 2 from the sliding state to the initial state.

[0058] When in use, the fixed section 23 is inserted into the platform 4. When a rock falls on the interception net 3, it has a large kinetic energy that can easily damage the interception net 3. Therefore, the present application adopts the configuration of the energy-absorbing section 22 being able to slide relative to the fixed section 23 and the reset spring 24. When a rock falls on the interception net 3, the energy-absorbing section 22 is driven to slide relative to the fixed section 23, and the reset spring 24 is extended. The reset spring 24 returns to its natural state and offsets part of the kinetic energy generated by the rock fall, thereby absorbing energy and reducing the possibility of damage to the interception net 3.

[0059] Reference Figure 5 A spring slot 231 is formed at the top of the side of the fixing section 23. The spring slot 231 extends through the top surface of the fixing section 23. A baffle 221 is fixedly connected to one end of the bottom surface of the energy-absorbing section 22. The baffle 221 is located at the opening of the side of the spring slot 231 and fits in the spring slot 231. A return spring 24 is located in the spring slot 231. One end of the return spring 24 is connected to the inner wall of the spring slot 231, and the other end of the return spring 24 is connected to the baffle 221. The return spring 24 is installed inside the column 2, protecting it and improving the overall flatness and aesthetics of the column 2.

[0060] Reference Figure 5 A first dovetail block 2211 is fixedly connected to the bottom surface of the baffle 221. A first dovetail groove 232 is defined on the side wall of the fixed section 23 for the first dovetail block 2211 to slide in. The first dovetail groove 232 is located below and communicates with the spring groove 231. A second dovetail block 2214 is fixedly connected to the bottom surface of the energy-absorbing section 22. A second dovetail groove 233 is defined on the top surface of the fixed section 23 for the second dovetail block 2214 to slide in. One end of the second dovetail groove 233 passes through the side wall of the fixed section 23 away from the baffle 221, and the other end of the second dovetail groove 233 communicates with the spring groove 231. When the column 2 is in the initial state, the second dovetail block 2214 is located adjacent to the spring groove 231. This helps to improve the stability of the energy-absorbing section 22 sliding relative to the fixed section 23.

[0061] Reference Figure 5-7 The return spring 24 is fixedly connected to connecting blocks 241 at both ends. A first connecting groove 2311 is defined on the inner wall of the spring slot 231 opposite the baffle 221. A second connecting groove 2212 is defined on the side wall of the baffle 221 near the spring slot 231. An observation slot 2213 is defined on the side wall of the second connecting slot 2212 away from the first connecting groove 2311. The observation slot 2213 is smaller than the second connecting groove 2212. The connecting block 241 at one end of the return spring 24 is embedded in the first connecting groove 2311 and fixed by screws. The connecting block 241 at the other end of the return spring 24 is embedded in the second connecting groove 2212.

[0062] When connecting the fixed section 23 and the energy absorbing section 22, and installing the return spring 24, first, the connecting block 241 at one end of the return spring 24 is embedded in the first connecting groove 2311 and fixed with screws, so that the return spring 24 is located in the spring groove 231. Then, the first dovetail block 2211 is aligned with the opening of the first connecting groove 2311 located on the side wall of the column 2. At the same time, the second dovetail block 2214 is aligned with the second connecting groove 2212 and the end connected to the spring groove 231. At this time, the connecting block 241 at the other end of the return spring 24 is embedded in the second connecting groove 2212, and it can be observed by observing the through groove 2213 whether the connecting block 241 at the other end of the return spring 24 is aligned with the second connecting groove 2212. The connection of the fixed section 23 and the energy absorbing section 22 and the installation of the return spring 24 are completed in one step, which is simple and convenient to operate. After the return spring 24 is used for a long time, it is also convenient to replace the return spring 24.

[0063] Reference Figure 4-6A first limiting groove 25 is formed on the top surface of the column 2, extending through the energy absorbing section 22 along its height. A second limiting groove 26 is formed on the top surface of the fixing section 23, communicating with the second dovetail groove 233. The fixing member is a connecting rod 5. When the column 2 is in its initial state, the first limiting groove 25 and the second limiting groove 26 are connected and coaxially arranged, and the connecting rod 5 is simultaneously inserted into the first limiting groove 25 and the second limiting groove 26. A blocking hole 27 is also formed on the top surface of the column 2, communicating with the first limiting groove 25 and having an opening larger than the opening of the first connecting groove 2311. A sealing plug 271 is threadedly connected to the sealing hole 27. The top surface of the sealing plug 271 is flush with the top surface of the column 2, and the bottom surface of the sealing plug 271 abuts against the top end of the connecting rod 5.

[0064] When driving the column 2 into the platform 4, the column 2 is in its initial state. The connecting rod 5 limits and fixes the energy-absorbing section 22 and the fixed section 23 in the thickness direction. The first dovetail block 2211 and the first dovetail groove 232, the second dovetail block 2214 and the second dovetail groove 233 limit and fix the column 2 in the vertical direction, making the column 2 a stable whole and facilitating driving the fixed section 23 of the column 2 into the platform 4. After the fixed section 23 is driven into the platform 4, the sealing plug 271 is unscrewed and the connecting rod 5 is removed, releasing the limit and fixation of the fixed section 23 and the energy-absorbing section 22 in the thickness direction of the column 2. This allows the energy-absorbing section 22 to slide relative to the fixed section 23 to absorb energy when impacted by falling rocks. The structure is simple, and the fixing and releasing operations are simple and convenient.

[0065] Reference Figure 5 and Figure 8 An installation space 6 is provided in the fixed section 23. The installation space 6 is located below the second limiting groove 26 and is connected to the second limiting groove 26 through a threading channel 61. The top of the connecting rod 5 is pointed, and a hand-held through hole is provided on the side wall of the pointed top of the connecting rod 5. The bottom end of the connecting rod 5 is fixedly connected to the connecting rope 52. A reeling mechanism 7 is installed in the installation space 6. The end of the connecting rope 52 away from the connecting rod 5 is connected to the reeling mechanism 7 and is retracted and released by the reeling mechanism 7. When the column 2 is in the initial state, the connecting rod 5 is inserted into the first limiting groove 25 and the second limiting groove 26, and the connecting rope 52 is reeled by the reeling mechanism 7. When the column 2 needs to transition from the initial state to the sliding state, the sealing plug 271 is opened, the connecting rod 5 is removed from the first limiting groove 25 and the second limiting groove 26 and inserted into the inclined surface of the slope 1, and the connecting rope 52 is extended by the reeling mechanism 7.

[0066] After the sealing plug 271 is opened, the setting of the handheld through hole makes it convenient for the staff to remove the connecting rod 5 from the first limiting groove 25 and the second limiting groove 26. After the connecting rod 5 is taken out, it is inserted into the inclined surface of the slope 1. The connecting rod 5 not only plays the role of limiting and fixing the energy-absorbing section 22 and the fixed section 23, but also cooperates with the column 2 and the connecting rope 52. The three form a stable triangular structure, which further improves the stability of the guardrail installation.

[0067] Reference Figure 5 and Figure 8-9 The winding mechanism 7 includes a coil spring 71 and a fixed shaft 72. The width of the coil spring 71 is adapted to the width of the installation space 6. The inner end of the coil spring 71 is fixedly connected to the fixed shaft 72. The two ends of the fixed shaft 72 are fixed to the two opposite inner walls of the installation space 6. The end of the connecting rope 52 away from the connecting rod 5 is fixed to the outer end of the coil spring 71. When the column 2 is in the initial state, the coil spring 71 is in a natural state, and the connecting rope 52 is wound around the coil spring 71 for winding. When the column 2 needs to transition from the initial state to the sliding state, the connecting rope 52 is lengthened by contracting the coil spring 71. After the connecting rod 5 is inserted into the inclined surface of the slope 1, the coil spring 71 can continue to contract, and a portion of the connecting rope 52 is still wound around the coil spring 71.

[0068] When the column 2 is in its initial state, the coil spring 71 is in its natural state, and the connecting rope 52 is wound around the coil spring 71 to be reeled in. When the column 2 needs to transition from its initial state to a sliding state, the connecting rope 52 is lengthened by contracting the coil spring 71. After the connecting rod 5 is inserted into the inclined surface of the slope 1, the coil spring 71 can continue to contract, and the connecting rope 52 is still partially wound around the coil spring 71, leaving room for the energy-absorbing section 22 to slide relative to the fixed section 23. Energy absorption is achieved not only by the return spring 24, but also by the coil spring 71 and the connecting rope 52. This improves the overall installation stability of the guardrail while further enhancing the energy absorption effect. The structure is simple, making it easy to process and install.

[0069] Reference Figure 5 and Figure 8-9 A mounting slot 234 is defined on the side of the fixing section 23 away from the baffle 221. The mounting slot 234 communicates with the mounting space 6 and is wider than the mounting space 6. Two opposing third dovetail slots 235 are defined on the bottom wall of the mounting slot 234. The third dovetail slots 235 communicate with the mounting space 6. Third dovetail blocks 721 are fixedly connected to both ends of the fixing shaft 72, and the third dovetail blocks 721 are inserted into the third dovetail slots 235. A fixing plate 73 is fixed to the mounting slot 234 via screws. Two dovetail rods 731 are fixedly connected to the side of the fixing plate 73 near the mounting space 6. The two dovetail rods 731 are respectively inserted into the two dovetail slots and press the third dovetail block 721 tightly against the third dovetail slot 235.

[0070] When installing the coil spring 71, align the third dovetail blocks 721 at both ends of the coil spring 71 with the third dovetail groove 235, push the coil spring to move the coil spring into the installation space 6, and then align the two dovetail rods 731 with the two third dovetail grooves 235 respectively, push the dovetail rod 731 into the third dovetail groove 235 until the dovetail rod 731 abuts against the third dovetail block 721. At this time, the fixing plate 73 moves into the installation groove 234, and then the fixing plate 73 is fixed to the installation groove 234 with screws to realize the installation of the coil spring 71. The operation is simple and convenient, and it is easy to replace the coil spring 71.

[0071] In a second aspect, the present application provides a construction method for an assembled guardrail for secondary excavation of an existing slope, which adopts the following technical solution:

[0072] A construction method for an assembled guardrail for secondary excavation of an existing slope, characterized by comprising the following steps:

[0073] S1. Installing the column 2: Place the column 2 in its initial state, i.e., with the connecting rod 5 inserted into the first connecting groove 2311 and the second connecting groove 2212 at the same time, and the sealing plug 271 threadedly connected to the sealing hole 27, and vertically drive the fixing section 23 of the column 2 into the platform 4. The mounting plate 21 is positioned above the platform 4 and abuts against the platform 4.

[0074] S2. Install the reinforcement column 213: Drive the reinforcement column 213 into the platform 4 at an angle, and fix the connecting plate 214 in the fixing groove 212 with screws;

[0075] S3. Install the connecting rod 5: Open the sealing plug 271 and take the connecting rod 5 out of the first connecting groove 2311 and the second connecting groove 2212. At this time, the coil spring 71 is in a reeled state, the connecting rope 52 is lengthened, and the connecting rope 52 passes through the first connecting groove 2311 and the second connecting groove 2212 and then goes around the top of the energy absorbing section 22, and the connecting rod 5 is driven into the slope of the slope 1.

[0076] The implementation principle of the assembled guardrail for secondary excavation of an existing slope in an embodiment of the present application is as follows: the columns 2 and the reinforcement columns 213 can fix and reinforce the installation of the guardrail, thereby improving the stability of the guardrail installation. After the excavation of the upper slope 1 is completed, the fallen rocks intercepted by the guardrail are cleaned up, and then the reinforcement columns 213 and the columns 2 are pulled out in turn. After the column 2 is rotated to roll up the interception net 3, it is moved to the next lower platform 4, the interception net 3 is opened and the above-mentioned installation steps are repeated to install the guardrail. The guardrail is easy to disassemble and assemble, and the installation stability is high. There is no need to set guardrails at multiple platforms 4. It is only necessary to disassemble and assemble and move the guardrail step by step. While achieving step-by-step protection, it effectively saves costs.

[0077] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An assembled guardrail for secondary excavation of an existing slope, comprising a plurality of columns (2) and an interception net (3) arranged between the columns (2), characterized in that: The bottom end of the column (2) is pointed and inserted into the platform (4); a mounting plate (21) is provided on the side wall of the column (2); the mounting plate (21) is located above the platform (4); a top surface of the mounting plate (21) is provided with an oblique groove (211) and a fixed groove (212) that are interconnected; the fixed groove (212) is located above the oblique groove (211), and the opening of the fixed groove (212) is larger than the opening of the oblique groove (211); The reinforcement column (213) is further provided with a connecting plate (214) at the top end of the reinforcement column (213), and the bottom end of the reinforcement column (213) is pointed. The reinforcement column (213) is inserted into the inclined groove (211) and is tilted. The tilt angle of the reinforcement column (213) matches the inclined groove (211). The reinforcement column (213) is inserted into the platform (4), and the connecting plate (214) is fixed in the fixing groove (212) by screws. The column (2) comprises an energy absorbing section (22) and a fixed section (23), the energy absorbing section (22) is located above the fixed section (23), and the intercepting net (3) is connected to the energy absorbing section (22); and the energy absorbing section (22) can slide relative to the fixed section (23) along the thickness direction of the column (2); the column (2) has an initial state and a sliding state, when the column (2) is in the initial state, the energy absorbing section (22) and the fixed section (23) are coaxially arranged, and when the column (2) is in the sliding state, the energy absorbing section (22) and the fixed section (23) are staggered; The column (2) is also provided with a fixing member and a reset spring (24), wherein the fixing member is used to fix the column (2) in an initial state, and the reset spring (24) is used to automatically reset the column (2) in a sliding state to the initial state.

2. The assembled guardrail for secondary excavation of an existing slope according to claim 1, characterized in that: A spring groove (231) is provided at the top end of the side surface of the fixed section (23), and the spring groove (231) passes through the top surface of the fixed section (23). One end of the bottom surface of the energy absorbing section (22) is fixedly connected to a baffle (221), and the baffle (221) is located at the opening of the side surface of the spring groove (231) and is adapted to the spring groove (231). The return spring (24) is located in the spring groove (231), and one end of the return spring (24) is connected to the inner wall of the spring groove (231), and the other end of the return spring (24) is connected to the baffle (221).

3. The assembled guardrail for secondary excavation of an existing slope according to claim 2 is characterized in that: A first dovetail block (2211) is fixedly connected to the bottom surface of the baffle (221), and a first dovetail groove (232) for the first dovetail block (2211) to slide is provided on the side wall of the fixed section (23), and the first dovetail groove (232) is located below the spring groove (231) and is communicated with the spring groove (231); a second dovetail block (2214) is fixedly connected to the bottom surface of the energy absorbing section (22), and a second dovetail groove (233) for the second dovetail block (2214) to slide is provided on the top surface of the fixed section (23), one end of the second dovetail groove (233) passes through the side wall of the fixed section (23) away from the baffle (221), and the other end of the second dovetail groove (233) is communicated with the spring groove (231). When the column (2) is in the initial state, the second dovetail block (2214) is located adjacent to the spring groove (231).

4. The assembled guardrail for secondary excavation of an existing slope according to claim 2 is characterized in that: The two ends of the return spring (24) are fixedly connected with connecting blocks (241); a first connecting groove (2311) is provided on the inner wall of the spring groove (231) and the baffle (221) that are arranged opposite to each other; a second connecting groove (2212) is provided on the side wall of the baffle (221) close to the inside of the spring groove (231); an observation through groove (2213) is provided on the side wall of the second connecting groove (2212) away from the first connecting groove (2311); the size of the observation through groove (2213) is smaller than that of the second connecting groove (2212); The connecting block (241) at one end of the return spring (24) is embedded in the first connecting groove (2311) and fixed by a screw, and the connecting block (241) at the other end of the return spring (24) is embedded in the second connecting groove (2212).

5. The assembled guardrail for secondary excavation of an existing slope according to claim 4 is characterized in that: A first limiting groove (25) is provided on the top surface of the column (2), and the first limiting groove (25) penetrates the energy absorbing section (22) along the height direction of the energy absorbing section (22); a second limiting groove (26) is provided on the top surface of the fixed section (23), and the second limiting groove (26) is communicated with the second dovetail groove (233); The fixing member is a connecting rod (5). When the column (2) is in an initial state, the first limiting groove (25) and the second limiting groove (26) are connected and coaxially arranged, and the connecting rod (5) is simultaneously passed through the first limiting groove (25) and the second limiting groove (26); a blocking hole (27) is also provided on the top surface of the column (2). The blocking hole (27) is connected to the first limiting groove (25) and the opening of the blocking hole (27) is larger than the opening of the first connecting groove (2311). A sealing plug (271) is connected to the inner thread of the blocking hole (27). The top surface of the sealing plug (271) is flush with the top surface of the column (2), and the bottom surface of the sealing plug (271) is in contact with the top end of the connecting rod (5).

6. The assembled guardrail for secondary excavation of an existing slope according to claim 5, characterized in that: An installation space (6) is provided in the fixed section (23), and the installation space (6) is located below the second limiting groove (26) and is connected to the second limiting groove (26) through a threading channel (61). The top end of the connecting rod (5) is pointed, and a hand-held through hole is provided on the side wall of the pointed top end of the connecting rod (5). The bottom end of the connecting rod (5) is fixedly connected to a connecting rope (52). A winding mechanism (7) is provided in the installation space (6), and the end of the connecting rope (52) away from the connecting rod (5) is connected to the winding mechanism (7) and is wound and released through the winding mechanism (7). When the upright post (2) is in an initial state, the connecting rod (5) is inserted into the first limiting groove (25) and the second limiting groove (26), and the connecting rope (52) is reeled in by the reeling mechanism (7); When the column (2) needs to transition from the initial state to the sliding state, the sealing plug (271) is opened, the connecting rod (5) is taken out from the first limiting groove (25) and the second limiting groove (26) and inserted into the inclined surface of the slope (1), and at this time the connecting rope (52) is lengthened by the winding mechanism (7).

7. The assembled guardrail for secondary excavation of an existing slope according to claim 6, characterized in that: The winding mechanism (7) includes a coil spring (71) and a fixed shaft (72), the width of the coil spring (71) is adapted to the width of the installation space (6), one end of the coil spring (71) located on the inner side is fixedly connected to the fixed shaft (72), two ends of the fixed shaft (72) are fixed to two opposite inner side walls of the installation space (6), and one end of the connecting rope (52) away from the connecting rod (5) is fixed to the end of the coil spring (71) located on the outer side; When the column (2) is in an initial state, the coil spring (71) is in a natural state, and the connecting rope (52) is wound around the coil spring (71) for winding; When the column (2) needs to transition from the initial state to the sliding state, the connecting rope (52) is lengthened by contracting the coil spring (71). After the connecting rod (5) is inserted into the inclined surface of the slope (1), the coil spring (71) can continue to contract, and a portion of the connecting rope (52) is still wound around the coil spring (71).

8. The assembled guardrail for secondary excavation of an existing slope according to claim 7, characterized in that: The fixing section (23) is provided with a mounting groove (234) on the side away from the baffle (221), the mounting groove (234) is communicated with the mounting space (6), and the width of the mounting groove (234) is greater than the width of the mounting space (6), and two opposite third dovetail grooves (235) are provided on the bottom wall of the mounting groove (234), the third dovetail grooves (235) are communicated with the mounting space (6), and the two ends of the fixing shaft (72) are fixedly connected. A third dovetail block (721) is connected, and the third dovetail block (721) is inserted into the third dovetail groove (235); a fixing plate (73) is fixed in the installation groove (234) by screws, and two dovetail rods (731) are fixedly connected on a surface of the fixing plate (73) close to the installation space (6), and the two dovetail rods (731) are respectively inserted into the two dovetail grooves and press the third dovetail block (721) tightly into the third dovetail groove (235).

9. The construction method of a prefabricated guardrail for secondary excavation of an existing slope according to claim 7, characterized in that: The steps include: S1. Installing the column (2): placing the column (2) in an initial state, i.e., inserting the connecting rod (5) into the first connecting groove (2311) and the second connecting groove (2212) at the same time, and threading the sealing plug (271) into the sealing hole (27), vertically driving the fixing section (23) of the column (2) into the platform (4), and placing the mounting plate (21) above the platform (4) and in contact with the platform (4); S2. Install the reinforcement column (213): drive the reinforcement column (213) into the platform (4) at an angle, and fix the connecting plate (214) in the fixing groove (212) by screws; S3. Installing the connecting rod (5): Open the sealing plug (271), and take the connecting rod (5) out of the first connecting groove (2311) and the second connecting groove (2212). At this time, the coil spring (71) is in a reeled state, the connecting rope (52) is lengthened, and the connecting rope (52) passes through the first connecting groove (2311) and the second connecting groove (2212) and then passes around the top of the energy absorbing section (22), and the connecting rod (5) is driven into the slope of the slope (1).

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