A method for anchoring the pre-tensioning force of an expansion screw of a failure bolt of a high-speed railway BWG turnout

Abstract

The application discloses an anchoring method of high-iron BWG turnout failure bolt expansion screw pre-tension force, which adopts the expansion screw pre-tension force anchoring method, so that the fastening force of the sleeper fastener on the same day can be tightened to the specified fastening value, the failure turnout sleeper bolt can be directly repaired and recovered on the same day, the fastener and the turnout sleeper plate are stably connected, the geometric size of the track is kept within the specified range, the track elasticity is uniform, and the driving safety of the high-speed train is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-speed railway technology, in particular to a method for anchoring the pretension of expansion screws of failed bolts of a high-speed railway BWG turnout. BACKGROUND

[0002] High-speed railway is the trend of railway development, and the maintenance of high-speed ballastless track equipment accounts for a large proportion in the maintenance work of the engineering department. Among them, the failure of turnout sleeper bolts shows an increasing trend year by year. In the process of high-speed railway turnout maintenance, the causes of turnout sleeper failure found on site can be divided into three types.

[0003] The first type is that the turnout sleeper bolt is stuck in the embedded foundation nut, and when the bolt is twisted out, the foundation nut rotates with the upper end of the bolt, resulting in an idle phenomenon, which makes the upper end of the bolt unable to be screwed in or out. The reason analysis: the main reason for this type of disease is that the plastic cup slot of the fixed foundation nut is damaged, so that the corners of the foundation nut cannot be forced, or the plastic cup slot of the foundation nut is aged and loses its original quality under the action of external force, so that the corners of the foundation nut cannot be forced.

[0004] The second type is that the turnout sleeper bolt cannot be screwed into the foundation nut, but the upper end of the bolt can be screwed out. The reason analysis: this type of disease is mainly that the positive direction corners of the plastic cup slot of the foundation nut are damaged, resulting in a gap, so that the foundation nut cannot be fixed when screwed in, and a slipping phenomenon occurs. How can the upper end of the bolt be screwed out without being affected? The reason is that the plastic cup slot of the foundation nut is not completely damaged, and when the bolt is screwed out, the corners of the foundation nut have a force point to fix, so that the screwing out operation is not affected. Other reasons: the thread teeth of the foundation nut are broken, broken, and rolled, so that the thread teeth of the upper end of the bolt cannot match the thread teeth of the foundation nut, causing difficulty in screwing in.

[0005] The third type is that in the operation, some turnout sleeper bolts appear the phenomenon that the whole cannot be screwed out or screwed in. The reason analysis: the turnout sleeper bolt part lacks periodic oiling maintenance, there is water and sand deposition in the plastic cup slot of the foundation nut, the thread teeth at the intersection of the bolt and the foundation nut are rusted, cannot be loosened, and appear dead phenomenon. In the process of laying construction and maintenance after operation, the turnout sleeper bolt of the turnout ballastless turnout fails, cannot normally connect the fastener with the turnout sleeper plate, and causes the geometric size of the track to exceed the limit. The track elasticity is uneven, which brings danger to the operation of high-speed trains. Therefore, an overhaul technology must be provided to solve the problem in time. SUMMARY

[0006] The purpose of the present application is a high-speed rail BWG turnout failure bolt expansion screw prestressed anchor method, which can quickly and effectively treat the failure of the bolt, and the advantages are that the treatment operation is completed on the same day, and the bolt pulling force can be restored to the original safety standard.

[0007] The present application is realized by the following technical solutions:

[0008] A high-speed rail BWG turnout failure bolt expansion screw prestressed anchor method, comprising the following steps:

[0009] Step S1, cut off the head of the seized bolt, and if the corresponding bolt of the same iron plate cannot be removed, the bolt head is also cut off;

[0010] Step S2, remove the washer and iron pad at the top of the bolt;

[0011] Step S3, use the track lifting machine to lift the rail to create a space under the rail bottom pad;

[0012] Step S4, use a sawing machine to saw off the bolt protruding above the ground;

[0013] Step S5, remove the rail bottom pad;

[0014] Step S6, install the aluminum hole positioner and positioning plate frame; the positioning plate frame is made of aluminum plate or center convex cylinder or center hollow circle;

[0015] Step S7, drill a hole, and use a 63mm quick hole opener to open a positioning groove in the inner circle of the plate frame; use a 56mm hole opener to open a groove hole on both sides of the 63mm water drill aluminum groove;

[0016] Step S8, remove the positioning plate frame;

[0017] Step S9, continue to drill with a 63mm water drill bit until the drill passes through the top of the original foundation nut cup cover, and the depth is between 150mm and 180mm;

[0018] Step S10, remove the nut old cover plate and gravel;

[0019] Step S11, use a 56mm water drill to continue to drill the groove hole to a depth of 7-8mm;

[0020] Step S12, use a chisel to chisel the groove hole, and remove the gravel and debris;

[0021] Step S13, use a dust collector to suck the remaining water and debris in the drill hole;

[0022] Step S14, pre-bury the foundation nut fastener, place the foundation nut fastener into the original 56mm drilled hole, and lay the foundation nut fastener flat and solid;

[0023] Step S15, use the impact drill to drill the foot nut fastener center hole with Φ16 drill bit, when the hole is shaped, take out the nut fastener, then continue to drill the two side slot hole holes to the position;

[0024] Step S16, use the dust collector to clean the dust in the slot hole;

[0025] Step S17, insert the Φ14 specification expansion screw into the slot hole, and tighten the expansion screw with a wrench to make the pre-tensioning force reach the requirement;

[0026] Step S18, after loosening and removing the expansion nut, the foot nut fastener is installed; the upper end nut of the foot nut fastener is tightened to make the pre-tensioning force reach the predetermined effect;

[0027] Step S19, after the foot nut fastener is buried, the filling slurry can be one of special cement slurry or anchoring plant glue, and is adjusted uniformly;

[0028] Step S20, use the glue gun to directly inject into the slot hole;

[0029] Step S21, when the slurry is filled to the sleeper plane, a piece of stainless steel sheet is printed on the slurry, and the area of the piece of stainless steel sheet is the same as the hole area of the water drill, so that the sleeper is kept smooth and smooth at the hole of the water drill;

[0030] Step S22, lay another plastic film with the same size as the rail bottom plate to prevent the grouting from sticking to the rail bottom plate;

[0031] Step S23, after the above steps are completed, the rail bottom plate and the fastener are installed;

[0032] Step S24, tighten the sleeper fastener, and the sleeper fastener can be tightened to the specified clamping value on the same day, so that the failed sleeper bolt can be directly repaired and restored on the same day.

[0033] Further, in the step S6, the aluminum block with the specification of 12㎜*160㎜*90㎜ is adopted, the inner circle diameter of the aluminum block after being cut in the center is 63㎜; the left and right inner circle hole diameters of the aluminum block after being cut on the left and right sides are 56㎜, the plate frame and the inner circle block can be separated, the Φ25 convex column is left in the middle of the 63㎜ inner circle block, which is used for stabilizing in the original bolt hole, after the aluminum plate frame is fixed, it is separated to form a positioning plate frame, at this time, the water drill only needs to be aligned with the circular hole in the plate frame to drill.

[0034] The beneficial effects of the present application are as follows:

[0035] The anchoring method of the expansion screw pre-tension force provided by the application adopts the expansion screw pre-tension force anchoring method, the fastening force of the sleeper fastener on the same day can be tightened to the specified fastening value, the failed frog sleeper bolt can be directly repaired and recovered on the same day, the fastener and the sleeper plate are stably connected, and the geometric size of the track is kept within the specified range; the track elasticity is uniform, and the safety of high-speed train operation is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a single block sleeper anchoring schematic diagram of the application.

[0037] Figure 2 It is a double block sleeper anchoring schematic diagram of the application. DETAILED DESCRIPTION

[0038] The application will be described in detail below in combination with the drawings and specific embodiments. The schematic embodiments and descriptions of the application are used to explain the application, but are not as a limitation on the application.

[0039] It should be noted that the description of "first" and "second" in the application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the application.

[0040] In the application, unless otherwise specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection; can be directly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specified. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the application can be understood according to the specific situation.

[0041] A high-speed rail BWG frog failed bolt expansion screw pre-tension force anchoring method, comprising the following steps:

[0042] Step S1, cutting off the head cap of the seized bolt, if the bolt corresponding to the same block iron plate cannot be removed, the head cap of the seized bolt is also cut off;

[0043] Step S2, take out the washer and iron pad at the top of the bolt;

[0044] Step S3, use the track-lifting machine to lift the rail, creating a space under the rail bottom pad;

[0045] Step S4, use the sawing machine to saw off the bolts above the tie pillow;

[0046] Step S5, remove the rail bottom pad;

[0047] Step S6, install the aluminum hole locator and positioning plate frame; the positioning plate frame can be made of aluminum plate or a center convex cylinder or a center hollow circle;

[0048] Step S7, drill the hole and use a 63mm quick hole opener to open the positioning slot in the inner circle of the plate frame; use a 56mm hole opener to open the slot holes on both sides of the 63mm water drill aluminum slot;

[0049] Step S8, remove the positioning plate frame;

[0050] Step S9, continue drilling with a 63mm water drill bit until the drill passes through the original foundation nut cup top, with a depth of 150mm-180mm;

[0051] Step S10, take out the nut old cover plate and gravel;

[0052] Step S11, use a 56mm water drill to continue drilling the slot hole to a depth of 7-8mm;

[0053] Step S12, use a chisel to chisel the slot hole and remove the debris;

[0054] Step S13, use a dust collector to suck out the remaining water and debris in the drill hole;

[0055] Step S14, pre-bury the foundation nut fastener, place the foundation nut fastener into the original 56mm drilled hole, and lay the foundation nut fastener flat and solid;

[0056] Step S15, use an impact drill with a Φ16 drill bit to align the center hole of the foundation nut fastener and drill, then remove the nut fastener and continue drilling the slot hole holes to the right position;

[0057] Step S16, use a dust collector to clean the dust in the slot hole;

[0058] Step S17, insert a Φ14 specification expansion screw into the slot hole, and tighten the expansion screw with a wrench until it is tight and solid, so that the pre-tensioning force meets the requirements;

[0059] Step S18, after loosening and removing the expansion nut, install the foundation nut fastener; tighten the upper nut of the foundation nut fastener to achieve the desired pre-tensioning force;

[0060] Step S19, when the foot nut fastener is buried, the filling slurry can be one of the two slurries, special cement slurry or anchoring tendon glue, and the slurry is adjusted uniformly;

[0061] Step S20, use the glue gun to directly inject into the slot hole;

[0062] Step S21, when the slurry is filled to the sleeper plane, a piece of stainless steel is printed on the slurry, and the area of the piece of stainless steel is the same as the hole area of the water drill, so that the frog is smooth and smooth at the hole of the water drill;

[0063] Step S22, lay another piece of plastic film with the same size as the rail base plate to prevent the grouting from sticking to the rail base plate;

[0064] Step S23, after the above steps are completed, the rail base plate and the fastener are installed; refer to Figure 1 ,

[0065] Step S24, tighten the rail tie fastener, and the rail tie fastener can be tightened to the specified clamping value on the same day, so that the failed frog bolt can be directly repaired and restored on the same day.

[0066] Specifically, in the step S6 of the embodiment, a 12mm*160mm*90mm aluminum block is used, the inner circle diameter of the aluminum block after cutting in the center is 63mm; the left and right inner circle hole diameters of the aluminum block after cutting on the left and right sides are 56mm, the plate frame and the inner circle block can be separated, the Φ25 convex column is left in the middle of the 63mm inner circle block, used for stabilizing in the original bolt hole, after the aluminum plate frame is fixed, it is separated to form a positioning plate frame, at this time, only the water drill is aligned with the circular hole in the plate frame to drill.

[0067] The application provides an anchoring method for high-speed rail BWG turnout failure bolt expansion screw pre-tension, which adopts the expansion screw pre-tension anchoring method, the rail tie fastener can be tightened to the specified clamping value on the same day, so that the failed frog bolt can be directly repaired and restored on the same day, the fastener and the frog plate are stably connected, and the geometric size of the track is kept within the specified range; the track elasticity is uniform, and the safety of high-speed train operation is ensured.

[0068] The technical solutions provided by the embodiments of the application are described in detail above, specific examples are applied in this paper to describe the principles and implementation modes of the embodiments of the application; the above embodiment description is only applicable to help understand the principles of the embodiments of the application; meanwhile, for those skilled in the art, according to the embodiments of the application, the specific implementation modes and application ranges will be changed, and the above description should not be understood as a limitation of the application.

Claims

1. A high-speed rail BWG turnout failure bolt expansion screw prestressed force anchoring method, characterized in that, Comprise the following steps: Step S1, cut off the head of the bolt, if the same piece of iron plate corresponding to the bolt also can not be removed, also cut off the bolt head; Step S2, take out the washer and iron pad at the top of the bolt; Step S3, use the track jack to lift the rail, so that the rail bottom pad plate produces a space; Step S4, use the saw machine to saw off the bolt above the ground; Step S5, remove the rail bottom pad plate; Step S6, install the aluminum hole locator and positioning plate frame; the positioning plate frame is made of aluminum plate with specifications of 12mm×160mm×90mm, the center of the aluminum plate is cut to form a structure with an inner circle diameter of 63mm, and a Φ25mm convex cylinder is left in the center, and the aluminum plate is cut to form a center hollow circle with a diameter of 56mm on both sides; the inner circle block of the positioning plate frame and the aluminum plate can be separated, the convex cylinder is used to stabilize in the original bolt hole, and the aluminum plate frame is fixed after the inner circle block is separated to form a positioning structure; Step S7, drill a hole, use a 63mm quick hole opener to open a positioning groove in the inner circle of the plate frame; use a 56mm hole opener to open a groove hole on both sides of the 63mm water drill aluminum groove; Step S8, remove the positioning plate frame; Step S9, continue to drill with a 63mm water drill bit until the drill passes through the original foot nut cap top, and the depth is between 150mm-180mm; Step S10, take out the nut old cover plate and gravel; Step S11, use a 56mm water drill to continue to drill the groove hole to 7-8mm deep; Step S12, use a chisel to chisel the groove hole, and take out the gravel and sundries; Step S13, use a dust collector to suck the remaining water and sundries in the drill hole; Step S14, pre-bury the foot nut fastener, put the foot nut fastener into the original 56mm hole, and lay the foot nut fastener flat and solid; Step S15, use an impact drill to install a Φ16 drill bit and align the center hole of the foot nut fastener for impact drilling; after the drill hole is shaped, take out the nut fastener, and then continue to drill the groove hole to the right position; Step S16, use a dust collector to clean the dust in the groove hole; Step S17, put a Φ14 specification expansion screw into the groove hole, and tighten the expansion screw with a wrench to make the pre-tensioning force reach the requirement; Step S18, after loosening and removing the expansion nut, install the foot nut fastener; tighten the nut at the upper end of the foot nut fastener to make the pre-tensioning force reach the predetermined effect; Step S19, after the foot nut fastener is buried, fill the grout, which can be one of special cement grout or anchoring adhesive grout, and mix well; Step S20, use a glue gun to directly inject into the groove hole; Step S21, when the grout is filled to the sleeper plane, use a piece of stainless steel prepared in advance to print on the grout, and the area of the stainless steel is the same as the hole area of the water drill, so that the sleeper is kept smooth and smooth at the hole of the water drill; Step S22, lay another piece of plastic film with the same size as the rail bottom pad plate to prevent the grout from sticking to the rail bottom pad plate; Step S23, after the above steps are completed, install the rail bottom pad plate and fastener; Step S24, fastening the sleeper fastener, the fastening force of the sleeper fastener on the same day can be fastened to a specified fastening value, so that the failed turnout sleeper bolt can be directly repaired and restored on the same day.

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