阅读说明：本技术 带eps减荷板的钢波纹涵管结构 (Take steel ripple culvert pipe structure of EPS offloading board ) 是由 赵建华 鲁楠 于 2021-02-03 设计创作，主要内容包括：本发明公开了一种带EPS减荷板的钢波纹涵管结构,包括地基,在地基上铺设砂砾石垫层,砂砾石垫层上设置钢波纹涵管,钢波纹涵管的上端面设置横向EPS减荷体,钢波纹涵管的两侧、上端及横向EPS减荷体上端为填土层,横向EPS减荷体包括多片叠置的EPS单板,最下层的EPS单板宽度大于钢波纹涵管的最大外径,多片EPS板通过他们中央的一列固定长钉连接,固定长钉的下端与钢波纹涵管连接。本发明在钢波纹涵管的顶部设置横向EPS减荷体,横向EPS减荷体以增加管顶填土沉降变形空间,并在钢波纹涵管的两侧设置竖向EPS减荷体,横向EPS减荷体与竖向EPS减荷体收敛变形协同工作,对钢波纹涵管整体进行减荷,可延长涵管的寿命,保护涵管的结构安全。(The invention discloses a steel corrugated culvert pipe structure with EPS (expandable polystyrene) load reducing plates, which comprises a foundation, wherein a gravel stone cushion layer is laid on the foundation, a steel corrugated culvert pipe is arranged on the gravel stone cushion layer, a transverse EPS load reducing body is arranged on the upper end surface of the steel corrugated culvert pipe, two sides, the upper end and the upper end of the transverse EPS load reducing body of the steel corrugated culvert pipe are filled with soil layers, the transverse EPS load reducing body comprises a plurality of superposed EPS single plates, the width of the EPS single plate at the lowest layer is greater than the maximum outer diameter of the steel corrugated culvert pipe, the EPS plates are connected through a row of fixing long nails in the center of the steel corrugated culvert pipe, and the lower ends of the fixing long nails are connected with the steel corrugated. The transverse EPS load reducing bodies are arranged at the tops of the steel corrugated culvert pipes and are used for increasing the soil filling settlement deformation space at the top of the steel corrugated culvert pipes, the vertical EPS load reducing bodies are arranged on two sides of the steel corrugated culvert pipes, and the transverse EPS load reducing bodies and the vertical EPS load reducing bodies are in convergent deformation cooperative work to reduce the load of the whole steel corrugated culvert pipes, so that the service life of the culvert pipes can be prolonged, and the structural safety of the culvert pipes can be protected.)

1. Take steel ripple culvert pipe structure of EPS offloading board, its characterized in that, including the ground, lay gravel stone bed course (1) on the ground, set up steel ripple culvert pipe (2) on gravel stone bed course (1), the up end of steel ripple culvert pipe (2) sets up horizontal EPS offloading body (3), the both sides of steel ripple culvert pipe (2), upper end and horizontal EPS offloading body (3) upper end are soil-filled layer (7), horizontal EPS offloading body (3) include the EPS veneer of multi-disc superpose, and the EPS veneer width of lower floor is greater than the maximum external diameter of steel ripple culvert pipe, and the multi-disc EPS board is connected through a fixed spike (4) in their central authorities, and the lower extreme and the steel ripple culvert pipe (2) of fixed spike (4) are connected.

2. The corrugated steel culvert structure with the EPS load-reducing plates according to claim 1, characterized in that vertical EPS load-reducing bodies (5) are arranged on two sides of the corrugated steel culvert (2), each vertical EPS load-reducing body (5) comprises at least one EPS veneer, each vertical EPS load-reducing body (5) is fixed by a base (6) embedded in the gravel stone cushion layer (1), and the height of each vertical EPS load-reducing body (5) is greater than the radius of the corrugated steel culvert (2).

3. The corrugated steel culvert structure with EPS (expandable polystyrene) offloading plates according to claim 1 or 2, characterized in that in the transverse EPS offloading body (3), a plurality of EPS veneers are stacked in a ladder shape from top to bottom, wherein the EPS veneers on the upper layer are small, the EPS veneers on the lower layer are large, and the transverse EPS offloading body (3) is formed to be thick in the middle and thin at two sides when viewed from the cross section.

4. The steel corrugated culvert pipe structure with the EPS load-reducing plates as claimed in claim 3, wherein the lower end surface of the lowermost EPS single plate of the transverse EPS load-reducing body is provided with a stabilizing groove with an arc structure, and the stabilizing groove is attached to the arc top of the upper end of the steel corrugated culvert pipe (2).

5. The corrugated steel culvert structure with EPS relief plates in accordance with claim 4, characterized in that a grid equal to the transverse EPS relief bodies (3) is arranged on the upper end surface.

6. The corrugated steel culvert structure with EPS off-loading plates of claim 5 characterized in that, the thickness of the gravel stone bedding course (1) ranges from 30 to 100cm, the maximum gravel particle size of the gravel stone bedding course is less than 10mm, and the degree of compaction of the gravel stone bedding course is more than 97%.

Technical Field

The invention belongs to the technical field of railway and highway tunnel engineering, and particularly relates to a steel corrugated culvert pipe structure with an EPS (expandable polystyrene) load reducing plate.

Background

The corrugated steel culvert is also called a corrugated culvert, is a threaded corrugated pipe for culvert buried under a highway or a railway, and is a circular steel structure pipe which is made by rolling corrugated steel plates or assembling the corrugated steel plates. The corrugated structure of the metal corrugated pipe culvert can ensure that the stress on the road surface of the culvert is reasonable, the load distribution is uniform, and the metal corrugated pipe culvert has certain deformation resistance and can solve the problem of damage to the bridge and the pipe culvert concrete structure in northern cold areas (frost); the road surface has no expansion joints, so that the driving comfort is improved; the method is favorable for improving the 'wrong platform' phenomenon at the junction of the soft soil foundation structure and the embankment and improving the driving safety. The corrugated pipe culvert has low post-construction operation and maintenance cost, and the actual construction cost of the project is lower than that of bridges and culverts with the same span.

The soil filling height range of the steel corrugated culvert pipe is wide and can reach 0.5-40 m; the steel corrugated culvert still belongs to the rigid culvert category under the lower condition of filled soil, nevertheless along with the increase of the height of filled soil, culvert top vertical soil pressure constantly increases, and culvert pipe self also can produce vertical convergence deformation gradually under the effect of filled soil pressure, will produce when filled soil pressure surpasss steel corrugated culvert pipe intensity limit and destroy. In addition, when a vehicle passes through, the steel corrugated culvert pipe can generate sudden change load, the damage to the culvert is larger, the culvert is under high-strength load for a long time, and the risk of safety accidents is high.

Disclosure of Invention

The application provides a take steel ripple culvert pipe structure of EPS off-loading board solves among the prior art steel ripple culvert pipe and highly increases the yielding problem of too big load when filling soil.

In order to achieve the purpose, the technical scheme of the invention is as follows:

take steel ripple culvert pipe structure of EPS offloading board, including the ground, lay the gravel stone bed course on the ground, set up steel ripple culvert pipe on the gravel stone bed course, the up end of steel ripple culvert pipe sets up horizontal EPS offloading body, the both sides of steel ripple culvert pipe, upper end and horizontal EPS offloading body upper end are the bed filling layer, horizontal EPS offloading body includes the EPS veneer of multi-disc superpose, and the EPS veneer width of lower floor is greater than the maximum external diameter of steel ripple culvert pipe, and the multi-disc EPS board is connected through a fixed spike of their central authorities, and the lower extreme and the steel ripple culvert pipe of fixed spike are connected.

Further, the both sides of steel ripple culvert pipe set up vertical EPS off-loading body, and vertical EPS off-loading body includes at least a slice EPS veneer, and vertical EPS off-loading body is fixed through burying underground the intraformational base of gravel stone, and vertical EPS off-loading body 5 highly is greater than the radius of steel ripple culvert pipe.

Further, in the transverse EPS load-reducing body, a plurality of EPS single plates are stacked in a ladder shape from top to bottom, wherein the upper layer of EPS single plate is small, the lower layer of EPS single plate is large, and the transverse EPS load-reducing body 3 is thick in the middle and thin at two sides when viewed from the cross section.

Further, the lower end face of the EPS veneer at the lowest layer of the transverse EPS load-reducing body is provided with a stable groove of an arc structure, and the stable groove is attached to the arc top at the upper end of the steel corrugated culvert pipe.

Furthermore, a grid equal to the transverse EPS load-reducing body in size is arranged on the upper end face of the transverse EPS load-reducing body.

Further, the thickness of the gravel cushion layer ranges from 30 cm to 100cm, the maximum gravel particle size of the gravel cushion layer is less than 10mm, and the compactness of the gravel cushion layer is more than 97%.

The invention has the beneficial effects that:

1. the transverse EPS load reducing bodies are arranged at the tops of the steel corrugated culvert pipes and are used for increasing the soil filling settlement deformation space at the top of the steel corrugated culvert pipes, the vertical EPS load reducing bodies are arranged on two sides of the steel corrugated culvert pipes, and the transverse EPS load reducing bodies and the vertical EPS load reducing bodies are in convergent deformation cooperative work to reduce the load of the whole steel corrugated culvert pipes, so that the service life of the culvert pipes can be prolonged, and the structural safety of the culvert pipes can be protected.

2. The polystyrene foam (EPS) veneer has controllable compressive strength, namely, after the external pressure exceeds the yield stress, the internal microstructure of the polystyrene foam veneer gradually begins to be destroyed, and the plastic deformation section presents larger compressive deformation.

3. The transverse EPS load-reducing body is formed by stacking the plurality of EPS veneers in a ladder type from top to bottom, wherein the EPS veneers on the upper layer are narrow, and the EPS veneers on the lower layer are wide, so that a tower type integral structure is formed.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a schematic structural diagram of example 2 of the present invention;

FIG. 3 is a schematic structural diagram according to embodiment 3 of the present invention;

in the figure, 1-gravel stone cushion layer, 2-steel corrugated culvert pipe, 3-transverse EPS load reducing body, 4-fixed long nail, 5-vertical EPS load reducing body, 6-base and 7-filling layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The corrugated steel culvert pipe has the advantages of strong foundation deformation adapting capability, good earthquake resistance, high installation speed and the like, and is widely applied to culverts under highways and railways. When the vertical soil pressure of the culvert top exceeds the strength of the steel corrugated pipe material, the steel corrugated culvert pipe can gradually generate vertical convergence deformation, and when the soil filling pressure exceeds the ultimate strength of the steel corrugated culvert pipe, the culvert pipe can be damaged, and in order to solve the problems, the basic idea of the invention is as follows: the EPS load reducing body formed by combining polystyrene foam (EPS) veneers is arranged at the top and the side of the steel corrugated culvert pipe so as to increase the soil filling and settling deformation space at the top and the side of the steel corrugated culvert pipe and achieve the purpose of load reduction, thereby protecting the safety of the culvert structure.

Example 1:

referring to fig. 1, the embodiment discloses a corrugated steel culvert pipe structure with an EPS load-reducing plate, which comprises a foundation, wherein a gravel cushion layer 1 is laid on the foundation, the thickness of the gravel cushion layer 1 is 50cm, the maximum gravel particle size of the gravel cushion layer 1 is less than 10mm, and the compactness of the gravel cushion layer is more than 97%; the sand gravel cushion layer 1 is provided with a steel corrugated culvert pipe 2, the upper end surface of the steel corrugated culvert pipe 2 is provided with a transverse EPS load reducing body 3, the transverse EPS load reducing body 3 comprises four superposed EPS veneers, the thicknesses of the four superposed EPS veneers are the same and are 20cm, the width of the EPS veneer at the lowest layer is larger than the maximum outer diameter of the steel corrugated culvert pipe, the four EPS veneers are superposed in a ladder type from top to bottom, wherein the EPS veneer at the upper layer is narrow, the EPS veneer at the lower layer is wide, and the formed transverse EPS load reducing body 3 is thick in the middle and thin at two sides when viewed from the cross section; the four EPS boards are connected through a row of fixing long nails 4 in the center of the four EPS boards along the direction of the culvert pipe, and the lower ends of the fixing long nails 4 are welded, riveted or bonded with the steel corrugated culvert pipe 2. Two sides and the upper end of the steel corrugated culvert pipe 2 and the upper end of the transverse EPS load reducing body 3 are filled with soil layers 7, and the upper end surface of the transverse EPS load reducing body 3 is provided with a grid with the same size as the transverse EPS load reducing body; the grid is made of hard plastic or glass fiber reinforced plastic, and the grid distributes vertical pressure applied to the transverse EPS load-reducing body 3, so that excessive pressure at a certain point or a certain area of the transverse EPS load-reducing body 3 is avoided.

It should be noted that, in this embodiment, the transverse EPS load-reducing body 3 may also select more or fewer layers according to the actual height of the filled soil, and meanwhile, the thickness, length, and width of the EPS veneer may also be selected according to the specific load condition;

the transverse EPS load-reducing body 3 comprises a plurality of superposed EPS veneers, in the embodiment, the plurality of EPS veneers are superposed in a ladder type from top to bottom to form a tower type structure, and tests prove that the arrangement mode has a good load-reducing effect; in other embodiments, the transverse EPS load-reducing body 3 may be formed by stacking a plurality of equal-sized EPS single plates to form a rectangular structure or other irregular structures, which falls into the protection scope of the present invention.

Example 2:

referring to fig. 2, unlike example 1, the transverse EPS load-reducing body 3 includes five stacked EPS single plates, wherein, the upper four stacked EPS single plates have the same thickness, all 20cm, and their arrangement is the same as that in example 1, and are stacked in a ladder-like manner from top to bottom, the upper EPS single plate is narrow, and the lower EPS single plate is wide; still set up the EPS veneer of a slice thickening at the bottommost layer, its thickness is greater than 40cm, and the terminal surface is provided with the stable recess of arc structure under the EPS veneer of thickening, stabilizes the laminating of recess and the 2 upper end arc tops of steel ripple culvert pipe, can guarantee like this that whole horizontal EPS off-loading body 3 is difficult for toppling after the soil filling.

Example 3:

referring to fig. 3, different from embodiment 1 or 2, vertical EPS load reducing bodies 5 are arranged on two sides of the steel corrugated culvert 2, each vertical EPS load reducing body 5 comprises three equal-sized EPS single plates, each vertical EPS load reducing body 5 is fixed by a base 6 embedded in the gravel cushion layer 1, the height of each vertical EPS load reducing body 5 is greater than the radius of the steel corrugated culvert 2, and in the embodiment, the upper edge of each vertical EPS load reducing body 5 is on the horizontal diameter line of the steel corrugated culvert 2. The vertical EPS load reduction body 5 is used for reducing loads on two sides of the steel corrugated culvert pipe 2, reducing the horizontal pressure of soil filling on two sides of the steel corrugated culvert pipe 2 and prolonging the service life of the culvert.

Tests prove that the steel corrugated culvert which is not subjected to load reduction shows the characteristic of a rigid pipe at the lower filling stage of the pipe top, the steel corrugated culvert shows the characteristic of a flexible pipe along with the increase of the filling height and has the capacity of adjusting the soil pressure, the load reduction effect of the transverse EPS load reducing bodies arranged at the upper end of the steel corrugated culvert on the vertical pressure is remarkable, and the load reduction effect of the vertical EPS load reducing bodies arranged at the two sides of the steel corrugated culvert on the horizontal pressure is remarkable.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. Any partial modification or replacement within the technical scope of the present disclosure by a person skilled in the art should be included in the scope of the present disclosure.