Fabricated concrete snow protection shed tunnel structure

Abstract

The invention discloses a fabricated concrete snow protection shed tunnel structure which comprises a prefabricated top protection shed, prefabricated protection walls and prefabricated T-shaped concrete columns. The prefabricated protection wall is arranged on the side, close to the mountain, of the traffic lane; the prefabricated T-shaped concrete column is arranged on the free side of the traffic lane; the backing end of the prefabricated top protection tent is installed on the top of the prefabricated protection wall, and the free end of the prefabricated top protection tent is installed on the top of the prefabricated T-shaped concrete column. The fabricated concrete structure is used for a road section where avalanche may occur, due to the fact that the fabricated concrete structure is used, construction is convenient, the construction period is short, cost is low, safe passing of residents is guaranteed, and life and property safety of people is protected; meanwhile, through a special construction process, the protective awning forms a micro-arch shape with a certain pre-camber, accumulated snow can be effectively borne, and impact of snow blocks sliding off from a hillside can be effectively resisted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of snow prevention structure and intelligent construction technology, in particular to an assembled concrete snow prevention shed hole structure and a construction method. BACKGROUND

[0002] At present, snow prevention shed holes are mostly built in serious snow avalanche and wind snow sections. The snow prevention shed hole is an effective engineering measure to protect the line from snow hazards, and is widely used in domestic and foreign cold region railways and highways. The snow prevention shed hole is usually built near the mountain and adopts a reinforced concrete structure or a steel structure. Since the highway is far away from the city, the construction material transportation is inconvenient during the construction process, and it is difficult to build a standard concrete structure shed hole, and the cost is high, the construction period is long, and therefore the construction difficulty is great. The steel structure shed hole has a short construction period, but the maintenance cost is high in the later period. Therefore, the assembled concrete shed hole can meet the requirements of short construction period, simple construction and low maintenance cost in the later period, and is a good choice for highway snow prevention facilities. SUMMARY

[0003] In order to at least overcome the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide an assembled concrete snow prevention shed hole structure and a construction method.

[0004] In a first aspect, the embodiments of the present application provide an assembled concrete snow prevention shed hole structure, which comprises a prefabricated top protection canopy, a prefabricated protection wall and a prefabricated T-shaped concrete column; the prefabricated protection wall is arranged on the mountain side of the driving lane; the prefabricated T-shaped concrete column is arranged on the free side of the driving lane; the mountain side of the prefabricated top protection canopy is mounted on the top of the prefabricated protection wall, and the free side of the prefabricated top protection canopy is mounted on the top of the prefabricated T-shaped concrete column. The top of the prefabricated protection wall is provided with a vertically arranged mounting plate and a horizontally arranged key; the end of the mountain side of the prefabricated top protection canopy is mounted on the mounting plate through a bolt; the bottom of the mountain side of the prefabricated top protection canopy is mounted on the key through a key groove matched with the key; the key groove and the bolt are fixed by concrete grouting; The top of the prefabricated T-shaped concrete column is provided with a plurality of extension steels extending vertically from the inside of the prefabricated T-shaped concrete column; the free side of the prefabricated top protection canopy is provided with a steel hole matched with the extension steel; the steel hole of the free side of the prefabricated top protection canopy is matched and mounted on the extension steel, and the mounting part is grouted; adjacent prefabricated top protection canopies are connected through a wet joint. In a possible implementation manner, the prefabricated protection wall comprises a vertical wall, an anchor rod and a bottom plate. The bottom plate is embedded in the mountain side of the road, and the top of the bottom plate is provided with a groove and a pre-buried bolt; the vertical wall is vertically inserted into the groove and connected to the pre-buried bolt through a reserved hole; the vertical wall side is anchored to the mountain body on the mountain side of the road through the anchor rod.

[0005] In a second aspect, the embodiments of the present application also provide a construction method of a prefabricated concrete snow shed hole structure, which comprises: The prefabricated T-shaped concrete column is erected on the air side of the road, and the prefabricated protective wall is erected on the mountain side of the road; A full-frame support is erected between the prefabricated T-shaped concrete column and the prefabricated protective wall, and a plurality of jacks are arranged on the top of the full-frame support in the transverse direction of the snow shed; The mountain side end of the prefabricated top protective canopy is installed on the top of the prefabricated protective wall, and the air side end of the prefabricated top protective canopy is installed on the top of the prefabricated T-shaped concrete column, and the bottom of the prefabricated top protective canopy is fixed to the jacks; After the prefabricated top protective canopy is adjusted to meet the pre-camber by the jacks, the top of the prefabricated protective wall and the top of the prefabricated T-shaped concrete column are grouted, and the adjacent prefabricated top protective canopy is wet-jointed and poured; When the strength of the grouted and poured concrete reaches the expected strength, the jacks and the full-frame support are removed to complete the construction.

[0006] In a possible implementation, the calculation of the pre-camber comprises: The impact load and impact position of the falling snow on the prefabricated top protective canopy are calculated according to the possible snow accumulation of the mountain body on the mountain side of the road, and the uniform load of the snow on the prefabricated top protective canopy is calculated according to the possible snow accumulation on the top of the prefabricated top protective canopy; A finite element model containing the prefabricated top protective canopy, the prefabricated protective wall and the prefabricated T-shaped concrete column is constructed; The uniform load is applied to the top of the prefabricated top protective canopy in the finite element model, and the impact load is applied to the impact position on the top of the prefabricated top protective canopy for calculation; The displacement value of the impact position in the normal direction of the prefabricated top protective canopy is obtained from the calculation result, and a preset displacement value opposite in direction and same in value is applied to the impact position in the finite element model, and then the calculation is loaded again; When the stress, strain and displacement data in the calculation result meet the expected requirements, the preset displacement value is taken as the pre-camber.

[0007] In a possible implementation, adjusting the prefabricated top protective canopy to meet the pre-camber by the jacks comprises: determine an arch curve of the prefabricated roof shelter according to the pre-arch and the impact position; determine an extension length of each jack according to the arch curve, and the jack needs to be arranged at the impact position; limit the bottom of the prefabricated roof shelter by the jack so that the prefabricated roof shelter meets the pre-arch.

[0008] In a possible implementation, the determination of the arch curve comprises: the curve of the bottom of the prefabricated roof shelter after the preset displacement value is applied in the finite element model as the arch curve.

[0009] In a possible implementation, the determination of the extension length of each jack according to the arch curve comprises: obtain the position of the top of the full-frame support for supporting the support plate of the bottom of the jack; calculate the extension length of the jack by taking the upper top surface of the support plate as the bottom of the jack and the extension position of the jack at the corresponding position of the arch curve.

[0010] In a possible implementation, the support plate is parallel to the bottom surface of the prefabricated roof shelter.

[0011] Compared with the prior art, the present application has the following advantages and beneficial effects: The prefabricated concrete snow shelter structure can use the prefabricated concrete structure in a road section where snow avalanches may occur. Since the prefabricated concrete structure is used, the construction is more convenient, the construction period is short, the cost is low, the safety of residents is ensured, and the safety of people's lives and property is protected. At the same time, through a special construction process, the protective shelter is formed into a micro-arch with a certain pre-arch, which can effectively bear the accumulated snow and effectively resist the impact of snow blocks sliding down the slope. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and constitute a part of the application, do not constitute a limitation to the embodiments of the present application. In the drawings: Figure 1 is a structural schematic diagram of the embodiments of the present application; Figure 2 is a structural schematic diagram of the prefabricated protective wall of the embodiments of the present application; Figure 3 is a structural schematic diagram of the prefabricated T-shaped concrete column of the embodiments of the present application; Figure 4 is a construction schematic diagram of the embodiments of the present application; Figure 5It is a finite element model schematic diagram of the embodiment of the present application. Figure 6 It is a force calculation schematic diagram of the embodiment of the present application.

[0013] Markings in the drawings and corresponding component names: 1-precast top protective canopy, 2-precast protective wall, 3-precast T-shaped concrete column, 4-jack, 5-full-frame support, 21-bolt, 22-stand wall, 23-anchor rod, 24-bottom plate. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description, and do not limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowchart shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented in sequence, and the steps without logical context relationship can be reversed in sequence or implemented simultaneously. In addition, one or more other operations can be added to the flowchart or one or more operations can be removed from the flowchart under the guidance of the content of the present application.

[0015] In addition, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0016] Please refer to Figure 1 , a schematic diagram of an assembled concrete snow protection shed structure provided by the embodiment of the present application, further, the assembled concrete snow protection shed structure specifically can include a precast top protective canopy, a precast protective wall and a precast T-shaped concrete column; the precast protective wall is arranged on the side of the road near the mountain; the precast T-shaped concrete column is arranged on the side of the road near the air; the mountain end of the precast top protective canopy is installed on the top of the precast protective wall, and the air end of the precast top protective canopy is installed on the top of the precast T-shaped concrete column; The top of the prefabricated protective wall is provided with a vertically arranged mounting plate and a horizontally arranged key; the end of the mountain side of the prefabricated top protective canopy is mounted on the mounting plate by bolts; the bottom of the mountain side of the prefabricated top protective canopy is mounted on the key by matching the key groove; the key groove and the bolt are fixed by concrete grouting; The top of the prefabricated T-shaped concrete column is provided with a plurality of extending steel bars extending vertically from the inside of the prefabricated T-shaped concrete column; the free end of the prefabricated top protective canopy is provided with a steel bar hole matched with the extending steel bars; the steel bar hole of the free end of the prefabricated top protective canopy is matched and mounted on the extending steel bars, and the mounting place is grouted; adjacent prefabricated top protective canopies are connected by wet joints.

[0017] In the implementation of the embodiments of the present application, the prefabricated top protective canopy, the prefabricated protective wall and the prefabricated T-shaped concrete column are all prefabricated components; wherein the prefabricated top protective canopy is used for snow protection of the driving lane, and the prefabricated T-shaped concrete column and the prefabricated protective wall are arranged on the free side and the mountain side of the driving lane respectively; the prefabricated protective wall is arranged close to the mountain, so it is generally necessary to be fixed between the anchor rod anchored into the mountain and the mountain; and the prefabricated T-shaped concrete column is designed as an inverted T shape, the bottom is wide and fixed on the free side of the driving lane, and if necessary, a pile foundation can be provided for fixation. In one possible implementation, the bottom of the prefabricated T-shaped concrete column is fixed and mounted by a 2-meter-high 300mm-thick shear wall embedded in the soil body.

[0018] In the embodiments of the present application, the mountain side of the prefabricated top protective canopy is fixed by the steel bars reserved to extend out of the prefabricated T-shaped concrete column, and the free end is fixed on the top of the prefabricated protective wall by matching the key and the key groove and the bolts; the structure of the prefabricated T-shaped concrete column is described in Figure 3 , and the structure of the prefabricated protective wall is described in Figure 2 For the prefabricated top protective canopy, the loads it may face include the snow load caused by snowfall and the impact load of snow blocks sliding down the slope; wherein the snow load caused by snowfall needs to be borne by the prefabricated T-shaped concrete column and the prefabricated protective wall, and the impact load generally occurs within 1-3m close to the mountain, that is, the impact position is closer to the prefabricated protective wall, so in the embodiments of the present application, the key connection and the bolts can provide limiting and at the same time provide a certain deformation space for the connection part, thereby ensuring that the structure will not be damaged excessively when bearing the impact of snow blocks. At the same time, due to the limitation of the installation of the prefabricated top protective canopy, the end needs to be fixed and limited on the mountain side, so the end cannot be installed with prestressed anchors, and it is not easy to perform prestressed tensioning, so the method of constructing a pre-camber by a jack is adopted to resist the load. It should be understood that for the installation of the mountain side and the free end of the prefabricated top protective canopy, concrete needs to be poured and closed after installation.

[0019] In a possible implementation, the prefabricated protective wall comprises a vertical wall, an anchor rod and a bottom plate. The bottom plate is embedded in the side of the mountain of the driving lane, and a groove and a pre-buried bolt are arranged on the top of the bottom plate; the vertical wall is vertically inserted into the groove and connected to the pre-buried bolt through a reserved hole; and the side of the vertical wall is anchored to the mountain of the side of the mountain of the driving lane through the anchor rod.

[0020] When the embodiments of the present application are implemented, please refer to Figure 3 , which shows a specific structural diagram of the prefabricated protective wall; the bottom plate needs to be fixed on the side of the mountain of the driving lane, and can be fixed by embedding or increasing pile foundation, and the vertical wall needs to be anchored in the mountain through the anchor rod to increase the impact resistance of the prefabricated top protective canopy.

[0021] The embodiments of the present application also provide a construction method of the prefabricated concrete snow shed structure, which can be applied to the construction of the snow shed structure in the above-mentioned embodiments, and the construction method comprises the following steps: Erecting the prefabricated T-shaped concrete column on the side of the driving lane away from the air, and erecting the prefabricated protective wall on the side of the mountain of the driving lane; Erecting a full-frame support between the prefabricated T-shaped concrete column and the prefabricated protective wall, and arranging a plurality of jacks on the top of the full-frame support along the transverse direction of the snow shed; Fixing the mountain side end of the prefabricated top protective canopy on the top of the prefabricated protective wall, and fixing the air side end of the prefabricated top protective canopy on the top of the prefabricated T-shaped concrete column, and fixing the bottom of the prefabricated top protective canopy to the jacks; Adjusting the prefabricated top protective canopy to the prefabricated top protective canopy satisfying the pre-camber through the jacks, then grouting the top of the prefabricated protective wall and the top of the prefabricated T-shaped concrete column, and pouring the wet joint of the adjacent prefabricated top protective canopy; When the grouting and pouring concrete reach the expected strength, the jacks and the full-frame support are removed to complete the construction.

[0022] When the embodiments of the present application are implemented, the prefabricated T-shaped concrete column and the prefabricated protective wall need to be erected first, and the full-frame support needs to be erected between the two, please refer to Figure 4, shows the structural schematic diagram in the construction process; the top end of the full-support support can be fixed to set up a support plate to support the jack, and the top of the prefabricated protective wall is supported by the jack during the construction process. In actual work, the inventor found that, for mountainous roads, in order to prevent snow accumulation on the top of the snow shed hole, it is generally necessary to set the snow shed hole to be inclined to the open side; however, the inclined and planar snow shed hole has poor impact resistance to snow blocks sliding down the mountain, and is easily damaged at the connection between the snow shed hole and the stand column, and even causes damage to the snow shed hole; in order to prevent snow accumulation, the snow shed hole cannot be designed as a complete arch structure, which will cause the snow between the snow shed hole and the mountain to be unable to be discharged in time, increasing the snow load. Therefore, the inventor proposes a micro-arch snow shed hole, and the micro-arch structure is relatively high in requirements for the mold if it is realized in the prefabrication process, so in the embodiments of the present application, the micro-arch is mainly realized by the jack to apply a pre-arch during installation.

[0023] In the embodiments of the present application, when the jack applies a load to the bottom of the prefabricated top protective canopy, the free end of the prefabricated top protective canopy will generate a counterclockwise bending moment, which is equivalent to providing a counterclockwise prestressed bending moment to the extended steel bars at the top of the T-shaped concrete column; and the mountain side of the prefabricated top protective canopy will generate a clockwise bending moment, which is equivalent to providing a clockwise prestressed bending moment to the bolt, and the cooperation of the key and the keyway can limit the position and deformation of this part of the bending moment within a certain range; it should be understood that the key here is generally a trapezoidal key, and the keyway and the key can have a certain gap therebetween, thereby ensuring that the rotation can be within a certain range; at this time, the installation part is grouted with concrete, and the wet joint pouring of the adjacent prefabricated top protective canopy is carried out, which can fix the micro-arch shape generated at this time, thereby reducing the deformation in the opposite direction when the prefabricated top protective canopy is subjected to impact load, and thereby ensuring the integrity of the connection part without damage. At the same time, during the jacking process of the jack, the prefabricated top protective canopy will form a micro-arch shape with the arch top upward, which can have strong resistance to impact load without causing structural damage. Since the micro-arch of the prefabricated top protective canopy is still inclined to the open side, the snow can still slide to the open side, avoiding the accumulation of snow.

[0024] In a possible implementation, the calculation of the pre-arch includes: According to the possible snow accumulation of the mountain side of the road, the impact load and impact position of the snow on the prefabricated top protective canopy are calculated, and the uniform load of the snow on the prefabricated top protective canopy is calculated according to the possible snow accumulation on the top of the prefabricated top protective canopy; A finite element model including the prefabricated top protective canopy, the prefabricated protective wall, and the prefabricated T-shaped concrete column is constructed; Applying the uniformly distributed load to the top of the prefabricated top protection canopy in the finite element model, and applying the impact load to the impact position on the top of the prefabricated top protection canopy for calculation; Obtaining the displacement value of the impact portion along the normal direction of the prefabricated top protective canopy in the calculation result, and applying a preset displacement value having the same value as the displacement value in the opposite direction to the impact portion in the finite element model, and then re-loading and calculating; When the stress, strain and displacement data in the calculation results meet the expected requirements, the preset displacement value is used as the pre-camber.

[0025] When the embodiment of the present application is implemented, the degree of the micro-arch needs to be obtained through calculation. The basic principle of the calculation is that under the combined effect of the snow blocks formed by the snow accumulation on the mountain and the snow accumulation of the prefabricated top protective canopy, the prefabricated top protective canopy will not produce an arch toward the road surface. Based on this, the embodiment of the present application simulates the process through finite element analysis. Among them, the landing point of the falling snow and the impact load generated can be realized by existing numerical analysis software that can be used for snow sliding, such as RAMMS, which can simulate the sliding of snow, or use RocFall to simulate the sliding of snow blocks as rock blocks. It belongs to mature existing technology and is not limited in the embodiment of the present application. The uniformly distributed load can be calculated according to the actual situation and the corresponding building structure load specifications.

[0026] In the embodiment of the present application, a finite element model including a prefabricated top protective canopy, a prefabricated protective wall and a prefabricated T-shaped concrete column needs to be constructed. Figure 5 At this time, it is necessary to apply the uniformly distributed load and the impact load to the top of the prefabricated roof protection canopy in the finite element model. Since the prefabricated roof protection canopy exists in a planar form, it will deform downward, forming a downward-bending arch. When the impact load and the uniformly distributed load are superimposed, the maximum displacement value of the prefabricated roof protection canopy generally occurs at the impact location. Using this maximum displacement value as the pre-arch of the aforementioned micro-arch can effectively avoid damage to the prefabricated roof protection canopy under the combined action of the impact load and the uniformly distributed load. After obtaining the pre-arch, it is necessary to input this pre-arch into the finite element model for load calculation to ensure that after construction with this pre-arch, the prefabricated roof protection canopy will not produce downward arch deformation and stress-strain excess when subjected to the above-mentioned loads. At the same time, in the finite element model with this pre-arch, the bottom curve of the prefabricated roof protection canopy is the curve that the prefabricated roof protection canopy needs to achieve in practice.

[0027] For examples, see Figure 6 , shows a schematic diagram of the calculation and analysis of the embodiment of the present application, in which a section of the mountain lane of a secondary highway in a cold mountainous area in the north is taken as an example. According to local meteorological data, the maximum snow depth is 2.5m and the snow density is 0.17g / cm 3, the slope of the prefabricated top protection canopy is 10°, the snow distribution coefficient is taken as 1.0, and the attenuation coefficient is taken as 0.8 considering the snow sliding caused by driving vibration and snow impact. The calculation can obtain the uniform load of 3.33kPa; the mountain is modeled in the analysis software, and the impact position is obtained as between 3~4m from the top of the prefabricated top protection canopy of the mountain, and the impact load is 25kPa. At this time, the position of 3.5m at the top of the prefabricated top protection canopy is taken as the impact position. The displacement value of the impact position calculated by the finite element model is the maximum of 35mm, that is, the pre-camber is 35mm. At this time, the pre-camber is taken as the reverse displacement loaded to the impact position for calculation, and the maximum displacement of the top of the prefabricated top protection canopy is 0.2mm, which meets the requirements, and the stress and strain are also less than the requirements.

[0028] In a possible implementation, adjusting the prefabricated top protection canopy to meet the pre-camber by the jacks includes: determining a camber curve of the prefabricated top protection canopy according to the pre-camber and the impact position; determining an extension length of each jack according to the camber curve, and the impact position needs to be provided with a jack; limiting the bottom of the prefabricated top protection canopy by the jack so that the prefabricated top protection canopy meets the pre-camber.

[0029] In a possible implementation, the determination of the camber curve includes: taking the curve of the bottom of the prefabricated top protection canopy after the pre-set displacement value is applied in the finite element model as the camber curve.

[0030] In a possible implementation, determining the extension length of each jack according to the camber curve includes: obtaining the position of the top of the full-frame support for supporting the support plate of the bottom of the jack; taking the upper top surface of the support plate as the bottom of the jack, and taking the extension position of the jack at the corresponding position of the camber curve to calculate the extension length of the jack.

[0031] In the implementation of the embodiments of the present application, the arch-shaped curve adopts the curve of the bottom of the prefabricated top protection canopy after a preset displacement value is applied in the finite element model. The extension length of each jack can be determined through the positional relationship between the support plate and the bottom of the prefabricated top protection canopy. It should be understood that although the two ends of the prefabricated top protection canopy will be poured, rebound will inevitably occur after the jack is unloaded, so the extension length can be appropriately compensated when loaded, such as multiplying a compensation coefficient of 1.1 as the extension length of the jack, which should be within the protection scope of the embodiments of the present application. In a possible implementation, the bottom surface of the support plate and the prefabricated top protection canopy are parallel.

[0032] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0033] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, another division mode can be used, for example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can also be electrical, mechanical or other forms of connection.

[0034] The units described as separate components can or can not be physically separated. It is obvious to those skilled in the art that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0035] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0036] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a grid device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0037] The above specific embodiments further explain the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A prefabricated concrete snow shed tunnel structure, characterized by, The prefabricated top protection canopy (1), the prefabricated protection wall (2) and the prefabricated T-shaped concrete column (3); the prefabricated protection wall (2) is arranged on the side of the mountain of the driving lane; the prefabricated T-shaped concrete column (3) is arranged on the side of the empty space of the driving lane; the mountain side end of the prefabricated top protection canopy (1) is mounted on the top of the prefabricated protection wall (2), and the empty side end of the prefabricated top protection canopy (1) is mounted on the top of the prefabricated T-shaped concrete column (3); The top of the prefabricated protection wall (2) is provided with a vertically arranged mounting plate and a horizontally arranged key; the end of the mountain side end of the prefabricated top protection canopy (1) is mounted on the mounting plate through a bolt (21); the bottom of the mountain side end of the prefabricated top protection canopy (1) is mounted on the key through a key groove matched with the key; the key groove and the bolt (21) are fixed by concrete grouting; The top of the prefabricated T-shaped concrete column (3) is provided with a plurality of extension steels extending vertically from the inside of the prefabricated T-shaped concrete column (3); the empty side end of the prefabricated top protection canopy (1) is provided with a steel hole matched with the extension steel; the steel hole of the empty side end of the prefabricated top protection canopy (1) is matched and mounted on the extension steel, and the mounting place is grouted; The prefabricated top protection canopy (1) is connected by wet joint.

2. The prefabricated concrete snow shed tunnel structure according to claim 1, wherein, The prefabricated protection wall (2) comprises a vertical wall (22), an anchor rod (23) and a bottom plate (24); The bottom plate (24) is buried on the mountain side of the driving lane, and the top of the bottom plate (24) is provided with a recess and a pre-buried bolt; the vertical wall (22) is vertically inserted into the recess and connected to the pre-buried bolt through a reserved hole; the vertical wall (22) is anchored to the mountain body on the mountain side of the driving lane through the anchor rod (23).

3. A construction method of a prefabricated concrete snow shed tunnel structure, characterized by, The prefabricated concrete snow protection shed structure is applied to the prefabricated concrete snow protection shed structure of claim 1 or 2; The construction method comprises: The prefabricated T-shaped concrete column (3) is erected on the empty side of the driving lane, and the prefabricated protection wall (2) is erected on the mountain side of the driving lane; A full-frame support (5) is erected between the prefabricated T-shaped concrete column (3) and the prefabricated protection wall (2), and a plurality of jacks are arranged on the top of the full-frame support (5) along the transverse direction of the shed; The mountain side end of the prefabricated top protection canopy (1) is mounted on the top of the prefabricated protection wall (2), and the empty side end of the prefabricated top protection canopy (1) is mounted on the top of the prefabricated T-shaped concrete column (3), and the bottom of the prefabricated top protection canopy (1) is fixed to the jacks; After the prefabricated top protection canopy (1) is adjusted to the prefabricated top protection canopy (1) to meet the pre-camber, the top of the prefabricated protection wall (2) and the top of the prefabricated T-shaped concrete column (3) are grouted, and the wet joint of the adjacent prefabricated top protection canopy (1) is poured; When the strength of the grouted and poured concrete reaches the expected strength, the jacks and the full-frame support (5) are removed to complete the construction.

4. The prefabricated concrete snow shed tunnel structure according to claim 3, wherein, The calculation of the pre-camber comprises: According to the possible snowfall of the roadside mountain of the road, the impact load and impact position of the snowfall on the prefabricated top protection canopy (1) are calculated, and the uniform load of the snowfall on the prefabricated top protection canopy (1) is calculated according to the possible snowfall of the top of the prefabricated top protection canopy (1); A finite element model including the prefabricated top protection canopy (1), the prefabricated protection wall (2) and the prefabricated T-shaped concrete column (3) is constructed; The uniform load is applied to the top of the prefabricated top protection canopy (1) in the finite element model, and the impact load is applied to the impact position of the top of the prefabricated top protection canopy (1) for calculation; The displacement value of the impact position along the normal direction of the prefabricated top protection canopy (1) in the calculation result is obtained, and a preset displacement value opposite in direction and same in value as the displacement value is applied to the impact position in the finite element model for re-calculation; When the stress, strain and displacement data in the calculation result meet the expected requirements, the preset displacement value is taken as the pre-camber.

5. The prefabricated concrete snow shed tunnel structure according to claim 4, wherein, Adjusting the prefabricated top protection canopy (1) to meet the pre-camber of the prefabricated top protection canopy (1) by the jacks includes: Determining the camber curve of the prefabricated top protection canopy (1) according to the pre-camber and the impact position; Determining the extension length of each jack according to the camber curve, and the impact position needs to be provided with a jack; Limiting the bottom of the prefabricated top protection canopy (1) by the jacks so that the prefabricated top protection canopy (1) meets the pre-camber.

6. The prefabricated concrete snow shed tunnel structure according to claim 5, wherein, The determination of the camber curve includes: Taking the curve of the bottom of the prefabricated top protection canopy (1) in the finite element model after the preset displacement value is applied as the camber curve.

7. The prefabricated concrete snow shed tunnel structure according to claim 5, wherein, Determining the extension length of each jack according to the camber curve includes: Obtaining the position of the support plate at the top of the full-frame support (5) for supporting the bottom of the jack; Taking the upper top surface of the support plate as the bottom of the jack and the extension position of the jack at the corresponding position of the camber curve to calculate the extension length of the jack.

8. The prefabricated concrete snow shed tunnel structure according to claim 7, wherein, The support plate is parallel to the bottom surface of the prefabricated top protection canopy (1).

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