Steel sheet pile adjacent to railway business line and construction method thereof

Abstract

The present application belongs to the technical field of railway construction, and provides a steel sheet pile adjacent to a railway operating line and a construction method thereof, comprising: a pile guard plate, which is divided into an inner guard plate and an outer guard plate, the inner guard plate is located in the concave surface of the steel sheet pile, the middle part of the inner guard plate is arched towards the steel sheet pile, the outer guard plate is clasped on the back of the steel sheet pile, the middle part of the outer guard plate is arched away from the steel sheet pile, the inner guard plate and the outer guard plate are both provided with a buffer yielding gap between the inner guard plate and the outer guard plate and the steel sheet pile, the bottom of the inner guard plate and the outer guard plate are both inclined surfaces and are both fixed with the bottom of the steel sheet pile, so that the steel sheet pile is smoothly inserted into the soil layer. The present application can greatly resist the disturbance wave generated by the frequent vibration of the railway operating line on the soil, thereby protecting the steel sheet pile from bending and deforming for a long time in such an environment, effectively improving the supporting performance of the steel sheet pile, making the steel sheet pile support more durable, and ensuring the long-term stability of the foundation pit.

Description

Technical Field

[0001] This invention relates to the field of railway construction technology, and in particular to a steel sheet pile adjacent to an operational railway line and its construction method. Background Technology

[0002] In the construction of urban rail transit, it is common to encounter situations where deep foundation pits are excavated near existing railway lines. The dynamic loads generated by the existing railway lines during operation can significantly affect the support structures of nearby deep foundation pits, especially the steel sheet pile structures commonly used in foundation pit support.

[0003] Currently, for sheet piles in foundation pits adjacent to railway operating lines, in order to ensure the stability and safety of the existing roadbed and reduce disturbance to the existing roadbed soil, the sheet piles are not removed after being driven in and are embedded in the roadbed body as a permanent project. However, traditional sheet piles will bend and deform locally after long-term soil disturbance, which can easily reduce their stability and support effect, and pose a hidden danger to the safe operation of the existing line.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a steel sheet pile and its construction method near an operating railway line, so as to solve the problem that traditional steel sheet piles are easily affected by the dynamic load of the operating line and suffer long-term soil disturbance, resulting in a decline in their stability and support performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a steel sheet pile adjacent to an operating railway line and its construction method, comprising: a pile retaining plate, which is divided into an inner retaining plate and an outer retaining plate. The inner retaining plate is located in the concave surface of the steel sheet pile, and the middle part of the inner retaining plate arches towards the steel sheet pile. The outer retaining plate is fastened to the back of the steel sheet pile, and the middle part of the outer retaining plate arches away from the steel sheet pile. Both the inner and outer retaining plates have a buffer clearance reserved between them and the steel sheet pile.

[0007] Preferably, the bottom of both the inner and outer protective plates are inclined and fixed to the bottom of the sheet pile, so that the sheet pile can be smoothly inserted into the soil.

[0008] Preferably, the steel sheet pile is provided with reinforcing ribs on both the inner and outer sides of the middle section; The length direction of the reinforcing rib is consistent with the axial direction of the sheet pile; The width of the reinforcing rib is smaller than the buffer pressure relief gap.

[0009] Preferably, the buffer pressure relief gap is provided with a corrugated plate; The corrugated plate is made of spring steel.

[0010] Preferably, the length direction of the corrugated plate is consistent with the axial direction of the sheet pile; The steel sheet pile has through holes evenly distributed vertically along its middle section.

[0011] Preferably, the corrugated plate passes through the through hole to assemble the corrugated plate with the steel sheet pile; The corrugated plate has a wave height that matches the spacing between the inner and outer protective plates.

[0012] Preferably, a surrounding beam is horizontally installed on the arched back of the outer protective plate; The surrounding beam is fixed together with the inner protective plate, steel sheet piles, and outer protective plate by bolts.

[0013] Preferably, the shank of the bolt passes through the inner protective plate, the sheet pile, and the outer protective plate in sequence; Corresponding to the bolt, there are movable holes extending symmetrically up and down at the crest of the corrugated plate, allowing the shank of the bolt to pass through.

[0014] Preferably, a damping spring is fitted on the outer side of the bolt shank; The damping spring has two sections: one section is located in the buffer pressure relief gap between the inner protective plate and the steel sheet pile, and the other section is located in the buffer pressure relief gap between the outer protective plate and the steel sheet pile.

[0015] Preferably, a construction method for steel sheet piles adjacent to an operating railway line includes: Step S1, inspecting the steel sheet pile driving equipment and steel sheet piles, and selecting a flat and firm site for stacking; Step S2, measuring and setting out the steel sheet pile driving position lines according to the design drawings, and clearly marking them with white lime; Step S3, driving steel sheet piles towards the slope angle adjacent to the operating railway line according to construction standards; Step S4, installing retaining beams on the back of the steel sheet piles; Step S5, excavating the foundation pit according to construction standards.

[0016] Compared with the closest existing technology, the technical solution of the embodiments of the present invention has the following beneficial effects: This invention can significantly resist the disturbance waves generated by the frequent vibrations of railway operating lines on the soil, thereby protecting the steel sheet piles from bending and deformation in such environments for a long time. It effectively improves the support performance of the steel sheet piles, making the steel sheet pile support last longer and ensuring the long-term stability of the foundation pit. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a side view schematic diagram of the present invention; Figure 3 This is a partial top view of the present invention; Figure 4 This is a schematic diagram of the combination of steel sheet piles and corrugated plate structure of the present invention; Figure 5 This is an overall schematic diagram of the corrugated plate structure of the present invention; Figure 6 This is a schematic diagram of the through-hole opening on the steel sheet pile of the present invention; Figure 7 This is a bottom schematic diagram of the steel sheet pile structure of the present invention.

[0018] In the diagram: 1. Sheet pile; 2. Inner protective plate; 3. Outer protective plate; 4. Reinforcing rib; 5. Corrugated plate; 6. Through hole; 7. Beam; 8. Bolt; 9. Movable hole; 10. Vibration damping spring. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0020] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of the invention described herein can be implemented in an order other than that illustrated or described herein.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0022] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected," "linked," and "set up" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] This invention provides a steel sheet pile and its construction method for a railway line adjacent to an operating line. It has strong resistance to disturbance from the adjacent operating line, excellent support performance, and can maintain long-term support without bending or deformation, thus ensuring the long-term stability of the foundation pit.

[0024] Example, refer to Figure 1 , Figure 2 , Figure 3 and Figure 7 The system includes a pile retaining plate, which consists of an inner retaining plate 2 and an outer retaining plate 3. The retaining plate is made of the same material as the common sheet pile 1, giving it a certain deformation resilience. The inner retaining plate 2 is located inside the concave surface of the sheet pile 1, with its middle part arching towards the sheet pile 1. The two sides of the inner retaining plate 2 are fixed to the concave surface of the sheet pile 1. The outer retaining plate 3 is fastened to the back of the sheet pile 1, with its middle part arching away from the sheet pile 1. The two sides of the outer retaining plate 3 are fixed to the outer arched surface of the sheet pile 1. The bottom of both the inner retaining plate 2 and the outer retaining plate 3 are sloping and are welded to the bottom of the sheet pile 1 to ensure that the sheet pile 1 can be smoothly inserted into the soil and reduce the insertion resistance of the sheet pile 1. Both the inner retaining plate 2 and the outer retaining plate 3 have a buffer clearance between them and the sheet pile 1.

[0025] Specifically, refer to Figures 3-6A corrugated plate 5 is provided in the buffer pressure relief gap. The corrugated plate 5 is made of spring steel. The length direction of the corrugated plate 5 is consistent with the axial direction of the sheet pile 1. Through holes 6 are evenly distributed vertically in the middle of the sheet pile 1. There are two rows of through holes 6 symmetrically arranged on the sheet pile 1. The transverse length of the through holes 6 is consistent with the width of the corrugated plate 5. The corrugated plate 5 passes through the through holes 6 to assemble the pairs of corrugated plates 5 with the sheet pile 1. The wave height of the corrugated plate 5 is adapted to the spacing of the inner protective plate 2 and the outer protective plate 3 so that the wave crest of the corrugated plate 5 can contact the outer arch surface of the inner protective plate 2 or the inner concave surface of the outer protective plate 3, so as to receive the wave transmission of the inner protective plate 2 and the outer protective plate 3 in time. The corrugated plate 5 can initially be installed in several sections on the sheet pile 1 and then the adjacent ends are welded together to form a whole.

[0026] In this embodiment, reinforcing ribs 4 are welded to both the inner and outer sides of the middle of the sheet pile 1. These reinforcing ribs 4 are staggered from the corrugated plate 5 and do not interfere with each other. The length direction of the ribs is consistent with the axial direction of the sheet pile 1. The width of the reinforcing ribs 4 is smaller than the buffer pressure relief gap. On the one hand, the reinforcing ribs 4 enhance the bending resistance of the sheet pile 1, enabling it to withstand stronger soil slope pressure. On the other hand, they serve to relieve the corrugated plate 5. When the corrugated plate 5 deforms under stress to a certain extent, the inner protective plate 2 and the outer protective plate 3 come into contact with the corresponding reinforcing ribs 4, changing the flexible support of the corrugated plate 5 to a rigid support. The ribs replace the corrugated plate 5 in bearing the pressure, preventing the corrugated plate 5 from deforming beyond the stress limit and breaking. At the same time, the inner protective plate 2 and the outer protective plate 3 can also serve as auxiliary supports to improve the bending resistance of the sheet pile 1.

[0027] In this embodiment, a surrounding beam 7 is horizontally installed on the arched back of the outer protective plate 3. The side plates of two adjacent sheet piles 1 are hooked together and face opposite directions. Thus, the surrounding beam 7 is divided into an outer beam and an inner beam. The outer beam faces the earth slope adjacent to the railway operating line, and the inner beam faces the direction of the excavation pit. The inner beam is lower than the outer beam to ensure that the inner beam is lower than the top of the earth slope and to ensure the stability of the inner beam's support. The outer beam is higher than the earth slope and interacts with the inner beam. When a part of the sheet piles 1 is under stress, the surrounding beam 7 enables the whole to play a supporting role, thereby reducing the stress at the hooked connection of two adjacent sheet piles 1 and ensuring that it is not pushed apart by the pressure of the earth slope adjacent to the railway operating line, which would lead to the partial collapse of the sheet pile 1 system.

[0028] Specifically, refer to Figures 1-3The retaining beam 7 is made of I-beams or channel steel. It is fixed to the inner protective plate 2, sheet piles 1, and outer protective plate 3 by bolts 8. The bolt 8's shank passes sequentially through the inner protective plate 2, sheet piles 1, and outer protective plate 3. Corresponding to the bolt 8, there are symmetrically extending movable holes 9 at the crests of the corrugated plate 5, allowing the bolt 8's shank to pass through. These elongated movable holes 9 are designed to prevent interference from the bolt 8's pressure deformation of the corrugated plate 5. A damping spring 10 is fitted onto the outside of the bolt 8's shank. The damping spring 10 has two sections. One section of the damping spring 10 is located within the buffer gap between the outer protective plate 3 and the sheet piles 1, with one end of this section resting against the crest of the corrugated plate 5. The other end rests against the back of the sheet pile 1. This section of the damping spring 10 is not directly shown because it is obscured by the crest of the corrugated plate 5. The other section of the damping spring 10 is located in the buffer and pressure relief gap between the inner protective plate 2 and the sheet pile 1. One end of this section of the damping spring 10 rests against the outer arch surface of the inner protective plate 2, and the other end rests against the inner concave surface of the sheet pile 1. This reduces the impact of soil disturbance on the sheet pile 1 in both directions. Since the impact of soil disturbance on the sheet pile 1 is mainly concentrated on the surrounding beam 7, it is necessary to further enhance the damping and pressure relief capacity between the surrounding beam 7 and the sheet pile 1 through the damping spring 10, which means enhancing the elastic support performance of the corrugated plate 5 at this position.

[0029] The present invention also provides a construction method for steel sheet piles adjacent to an operating railway line, comprising: step S1, inspecting the steel sheet pile driving equipment and steel sheet piles, and selecting a flat and firm site for stacking them neatly; step S2, measuring and setting out the line, marking the steel sheet pile driving position line according to the design drawings, and marking it clearly with white lime; step S3, driving steel sheet piles towards the slope angle adjacent to the operating railway line according to construction standards; step S4, installing retaining beams on the back of the steel sheet pile system, one facing the operating railway line and the other facing the foundation pit to be excavated; step S5, excavating the foundation pit according to construction standards.

[0030] This invention can significantly resist the disturbance waves generated by the frequent vibrations of railway operating lines on the soil, thereby protecting the steel sheet piles from bending and deformation in such environments for a long time. It effectively improves the support performance of the steel sheet piles, making the steel sheet pile support last longer and ensuring the long-term stability of the foundation pit.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A type of steel sheet pile adjacent to an operational railway line, characterized in that, include: The sheet pile retaining plate consists of an inner retaining plate and an outer retaining plate. The inner retaining plate is located inside the concave surface of the sheet pile, with its middle section arching towards the sheet pile. The outer retaining plate is fastened to the back of the sheet pile, with its middle section arching away from the sheet pile. Both the inner and outer retaining plates have a buffer clearance between them and the sheet pile.

2. The sheet piles adjacent to an operating railway line according to claim 1, characterized in that, The bottom of both the inner and outer protective plates is inclined and fixed to the bottom of the sheet pile to allow the sheet pile to be smoothly inserted into the soil.

3. The sheet piles adjacent to an operational railway line according to claim 1, characterized in that, The steel sheet pile is provided with reinforcing ribs on both the inner and outer sides of the middle section; The length direction of the reinforcing rib is consistent with the axial direction of the sheet pile; The width of the reinforcing rib is smaller than the buffer pressure relief gap.

4. The sheet piles adjacent to an operating railway line according to claim 1, characterized in that, The buffer pressure relief gap is equipped with a corrugated plate; The corrugated plate is made of spring steel.

5. The sheet piles adjacent to an operating railway line according to claim 4, characterized in that, The length direction of the corrugated plate is consistent with the axial direction of the sheet pile; The steel sheet pile has through holes evenly distributed vertically along its middle section.

6. The sheet piles adjacent to an operating railway line according to claim 5, characterized in that, The corrugated plate moves through the through hole to assemble the corrugated plate with the steel sheet pile; The corrugated plate has a wave height that matches the spacing between the inner and outer protective plates.

7. The steel sheet piles and their construction method adjacent to an operating railway line as described in claim 6, characterized in that, A surrounding beam is horizontally installed on the arched back of the outer protective plate; The surrounding beam is fixed together with the inner protective plate, steel sheet piles, and outer protective plate by bolts.

8. The sheet piles adjacent to an operating railway line according to claim 7, characterized in that, The bolt shank passes through the inner protective plate, the sheet pile, and the outer protective plate in sequence; Corresponding to the bolt, there are movable holes extending symmetrically up and down at the crest of the corrugated plate, allowing the shank of the bolt to pass through.

9. The sheet piles adjacent to an operating railway line according to claim 8, characterized in that, A damping spring is fitted on the outer side of the bolt rod. The damping spring has two sections: one section is located in the buffer pressure relief gap between the inner protective plate and the steel sheet pile, and the other section is located in the buffer pressure relief gap between the outer protective plate and the steel sheet pile.

10. A method for constructing steel sheet piles adjacent to an operational railway line, characterized in that, The construction method uses the steel sheet piles adjacent to the railway operating line as described in any one of claims 1-9. The construction method includes: step S1, inspecting the steel sheet pile driving equipment and the steel sheet piles, and selecting a flat and firm site for stacking. Step S2: Measure and lay out the lines. Lay out the steel sheet pile driving positions according to the design drawings and mark them clearly with white lime. Step S3: Drive steel sheet piles into the slope angle adjacent to the railway operating line according to construction standards; Step S4: Install the retaining beam on the back of the sheet pile; Step S5: Excavate the foundation pit according to the construction standards.

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