Supporting foundation suitable for protecting vegetation in plateau permafrost region

Abstract

The utility model provides a support foundation suitable for plateau permafrost region vegetation protection, which comprises a pile foundation cylinder, a pile foundation cylinder footstock, a pile foundation cylinder base and a frost heaving piercing mechanism, the pile foundation cylinder footstock is fixedly mounted at the top of the pile foundation cylinder, and the pile foundation cylinder footstock is used for being connected with a target to be supported; a pile foundation cylinder base is arranged at the bottom of the pile foundation cylinder, and a plurality of threaded drill rod assemblies are arranged on the pile foundation cylinder base and used for being fixed to a foundation. The frost heaving piercing mechanism is fixedly installed on the cylinder wall of the pile foundation cylinder. When frost heaving happens to a soil body, under the effect of frost heaving, the transverse anchor rod of the frost heaving piercing mechanism can transversely pierce into the soil body outwards, so that the pile foundation cylinder and the surrounding soil body are anchored together. The construction is simple, the foundation hole is excavated, the threaded drill rod is installed and then the foundation soil is backfilled during construction, large-area excavation and concrete pouring in the original foundation are not needed, the structure is particularly suitable for natural reserve areas of frozen soil, and ecological damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation support, in particular to a support foundation suitable for protecting vegetation in plateau permafrost areas. Background Art

[0002] Frozen areas are also known as permafrost, tundra, or tundra. In physical geography, this refers to low temperatures and short growing seasons. In geology, it refers to various rocks and soils below 0°C that contain ice. They can generally be divided into short-term frozen ground, seasonal frozen ground, and permafrost. Frost heave refers to the situation in seasonal frozen or permafrost areas where, during the cold season, when the soil freezes and expands, the supporting foundation fixed in the frozen soil layer is lifted up due to the tangential frost heave force, losing its fixing effect. When the warm season thaws, the soil falls back, and the lifted supporting foundation is difficult to return to its original position, resulting in an uplift phenomenon. In view of this, it is necessary to propose an anti-freeze heave support foundation structure suitable for use in frozen areas.

[0003] At present, the existing anti-freeze support foundation structure requires large-scale excavation of the original foundation and large-scale pouring of concrete to construct a stable support foundation. However, concrete often causes alkalinization of the construction area and affects the growth of surrounding vegetation. Therefore, this construction method will cause ecological damage to nature reserves. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies of the prior art and provide a support foundation suitable for protecting vegetation in plateau permafrost areas.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A support foundation suitable for protecting vegetation in plateau permafrost areas, comprising a pile foundation tube, a pile foundation tube top seat, a pile foundation tube base, and a frost heave piercing mechanism;

[0007] A pile foundation cylinder top seat is fixedly installed on the top of the pile foundation cylinder, and the pile foundation cylinder top seat is used to connect with the target to be supported; the pile foundation cylinder base is set at the bottom of the pile foundation cylinder, and a plurality of threaded drill rod assemblies are set on the pile foundation cylinder base for fixing with the foundation;

[0008] The frost heave piercing mechanism is fixedly installed on the cylinder wall of the pile foundation cylinder, and the frost heave piercing mechanism comprises: an L-shaped main pipe, a sliding rod, a transverse anchor rod, a frost heave force sensing base and a movable soil retaining device, wherein the L-shaped main pipe comprises a transverse pipe section and a vertical pipe section at the top, a mounting block is fixedly provided inside the vertical pipe section of the L-shaped main pipe, the sliding rod is vertically slidably installed in the mounting block, a limiting plate is fixedly provided at the middle position of the sliding rod, a spring is provided between the limiting plate and the mounting block, and a limiting protrusion is provided inside the bottom end of the vertical pipe section of the L-shaped main pipe for limiting the limiting plate; a first piston is provided at the top end of the sliding rod; the transverse anchor rod is slidably installed in the transverse pipe section of the L-shaped main pipe, and a second piston is provided at the tail end of the transverse anchor rod; the interior of the L-shaped main pipe between the first piston and the second piston is filled with hydraulic oil;

[0009] A frost heave force sensing base is arranged at the bottom end of the sliding rod, and a movable soil retaining device is arranged between the frost heave force sensing base and the vertical pipe section of the L-shaped main pipe.

[0010] In the above technical solution, the pile foundation tube base is in the shape of an inverted cone, and the inverted cone-shaped pile foundation tube base can cause the foundation soil inside the foundation hole to produce a downward compression effect on it.

[0011] In the above technical solution, the threaded drill rod assembly includes a threaded barrel, a threaded drill rod and a protective cap. The threaded barrel is fixedly arranged on the base of the pile foundation barrel. The threaded drill rod is installed in the threaded barrel through a thread. The threaded drill rod is used to drill into the foundation. The protective cap is installed on the top of the threaded drill rod.

[0012] In the above technical solution, a frost heave piercing mechanism mounting frame is provided on the wall of the pile foundation cylinder, and the frost heave piercing mechanism is fixed on the frost heave piercing mechanism mounting frame.

[0013] In the above technical solution, a transverse retaining arm is provided on the frost heave piercing mechanism mounting frame, so that the transverse pipe section at the top of the L-shaped main pipe is fixedly welded to the transverse retaining arm.

[0014] In the above technical solution, the movable soil retaining device includes a top fixed cover and N-level sliding sleeves, where N is greater than or equal to 2. The top fixed cover is fixedly mounted on the bottom of the vertical pipe section of the L-shaped main pipe, and the N-level sliding sleeves are slidably mounted in sequence. Among them, the uppermost sliding sleeve is vertically slidably mounted within the top fixed cover, and the lowermost sliding sleeve is fixedly mounted on the frost heave force sensing base. In this way, during backfilling, the movable soil retaining device can block the backfill soil. When frost heave occurs, the movable soil retaining device can prevent the surrounding soil from exerting a downward force on the frost heave force sensing base. In addition, the N-level sliding sleeves can expand and contract vertically, so they will not hinder the upward movement of the frost heave force sensing base.

[0015] In the above technical solution, the front end of the transverse anchor rod is a pointed structure, which is convenient for penetrating into the soil.

[0016] In the above technical solution, barbs are also provided on the transverse anchor rods to facilitate stabilization in the soil after penetrating into the soil.

[0017] In the above technical solution, a limiting ring is further provided at the front end of the transverse pipe section of the L-shaped main pipe to limit the extreme position of the transverse anchor rod to be pushed outward to prevent the transverse anchor rod from falling out.

[0018] In the above technical solution, there are multiple frost heave piercing mechanisms, which are evenly distributed on the wall of the pile foundation tube in the circumferential direction.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The support structure of the utility model is simple to construct. During construction, the foundation hole is excavated, the threaded drill rod is installed, and the base soil is backfilled. There is no need to excavate a large area of ​​the original foundation and pour concrete (concrete often causes alkalization of the construction area and affects the growth of surrounding vegetation). It is particularly suitable for nature reserves with frozen soil to avoid ecological damage.

[0021] 2. The supporting foundation of the present invention has a frost heave piercing mechanism. The frost heave force sensing base is used to sense the frost heave force of the soil. Under the frost heave force, the sliding rod is driven to move upward. Before frost heave occurs, the bottom end of the sliding rod extends out of the bottom of the vertical pipe section of the L-shaped main pipe, leaving a margin for upward movement. When backfilling the foundation soil, a movable retaining device can be used to leave a movement space between the frost heave force sensing base and the bottom of the vertical pipe section of the L-shaped main pipe. There is no backfill soil in this space and it will not be affected by the downward frost heave force of the soil. At the same time, the movable retaining device will not hinder the upward movement of the frost heave force sensing base. After the backfill is completed, when the soil frost heaves, the sliding rod is moved vertically upward under the action of the frost heave, thereby driving the transverse anchor rod to penetrate the soil laterally outward, so that the pile foundation tube is anchored to the surrounding soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the installation of a support foundation suitable for protecting vegetation in plateau permafrost areas according to the present invention.

[0023] Figure 2 This is a schematic diagram of the support foundation of the utility model suitable for protecting vegetation in plateau permafrost areas.

[0024] Figure 3 for Figure 2 An enlarged schematic diagram of point A.

[0025] Figure 4 It is a structural schematic diagram of the frost heave penetration mechanism in the present utility model (the transverse anchor rod is in a contracted state).

[0026] Figure 5It is a structural schematic diagram of the frost heave piercing mechanism in the present utility model (the transverse anchor rod is in the piercing state). DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1-Figure 3 As shown, a supporting foundation suitable for protecting vegetation in plateau permafrost areas includes a pile foundation tube 1, a pile foundation tube top seat 2, a pile foundation tube base 3 and a frost heave penetration mechanism 5.

[0029] The pile foundation tube 1 is installed in the foundation 0 (during construction, first, a foundation hole 10 is excavated in the foundation 0, and then the pile foundation tube 1 is installed into the foundation hole 10 and backfilled). The pile foundation tube top seat 2 is fixedly installed on the top of the pile foundation tube 1. The pile foundation tube top seat 2 is used to connect with the target to be supported (for example, it can be a pipeline, road pole, etc.).

[0030] The pile foundation tube base 3 is arranged at the bottom of the pile foundation tube 1. The pile foundation tube base 3 is preferably in an inverted cone shape. The inverted cone-shaped pile foundation tube base 3 can make the foundation soil inside the foundation hole produce a downward compression effect on it; and a plurality of threaded drill rod assemblies are arranged on the pile foundation tube base 3. Specifically, the threaded drill rod assembly includes a threaded barrel 31, a threaded drill rod 32 and a protective cap 33. The threaded barrel 31 is fixedly arranged on the pile foundation tube base 3, and the threaded drill rod 32 is installed in the threaded barrel 31 through a thread. The threaded drill rod 32 is used to drill into the foundation, so that the pile foundation tube has better stability. The protective cap 33 is installed on the top of the threaded drill rod 32.

[0031] The frost heave piercing mechanism 5 is fixedly mounted on the wall of the pile foundation tube 1. Preferably, a frost heave piercing mechanism mounting frame 11 is provided on the wall of the pile foundation tube 1, and the frost heave piercing mechanism 5 is fixed on the frost heave piercing mechanism mounting frame 11. Figure 4 -Attached Figure 5 , specifically introduce the structure and working principle of the frost heave penetration mechanism 5.

[0032] The frost heave piercing mechanism 5 includes: an L-shaped main pipe 51, a sliding rod 52, a transverse anchor rod 53, a frost heave force sensing base 54 and a movable retaining device 55, wherein the L-shaped main pipe 51 is fixedly installed (welded) on the frost heave piercing mechanism mounting frame 11, and the L-shaped main pipe 51 includes a transverse pipe section and a vertical pipe section at the top. Preferably, since the L-shaped main pipe 51 of the frost heave piercing mechanism 5 is L-shaped, a transverse retaining arm 111 is provided on the frost heave piercing mechanism mounting frame 11 (see attached Figure 3 ), so that the horizontal pipe section at the top of the L-shaped main pipe 51 is fixedly welded to the horizontal blocking arm 111 (the vertical pipe section of the L-shaped main pipe 51 is welded to the vertical outer wall of the mounting frame 11) to ensure the stability of the L-shaped main pipe 51; the sliding rod 52 is vertically slidably installed in the vertical pipe section of the L-shaped main pipe 51. Specifically, a mounting block 56 is fixedly provided inside the vertical pipe section of the L-shaped main pipe 51. The sliding rod 52 is vertically slidably installed in the mounting block 56 and can slide up and down. A limit plate 58 is also fixedly provided in the middle position of the sliding rod 52. A spring 57 is provided between the limit plate 58 and the mounting block 56 to provide the sliding rod 52 with a direction of rotation. The elastic force under the load is generated, and a limiting protrusion 511 is provided inside the bottom end of the vertical pipe section of the L-shaped main pipe 51 to limit the limiting plate 58 and prevent the limiting plate 58 from falling out of the L-shaped main pipe 51; a first piston 59 is provided at the top end of the sliding rod 52; the transverse anchor rod 53 is slidably installed in the transverse pipe section of the L-shaped main pipe 51, and a sliding guide 532 is provided at the tail end of the transverse anchor rod 53 to ensure that the transverse anchor rod 53 can move stably in the transverse direction in the transverse pipe section of the L-shaped main pipe 51. A second piston 533 is also provided on the tail side of the sliding guide 532; the interior of the L-shaped main pipe 51 between the first piston 59 and the second piston 533 is filled with hydraulic oil.

[0033] Through the above structure, when the sliding rod 52 moves vertically upward, the first piston 59 applies pressure to the hydraulic oil, thereby driving the transverse anchor rod 53 to be pushed out laterally along the transverse pipe section of the L-shaped main pipe 51. Therefore, the function to be achieved by the present invention is that when the pile foundation tube 1 is backfilled and buried, the transverse anchor rod 53 is inside the transverse pipe section of the L-shaped main pipe 51. After the backfilling and burying is completed, when the soil frost heaves, the sliding rod 52 can be moved vertically upward under the action of the frost heave, thereby driving the transverse anchor rod 53 to penetrate the soil laterally outward, thereby more stably anchoring the pile foundation tube 1 to the surrounding soil, thereby effectively playing a role in preventing frost pullout. Therefore, the utility model is provided with a frost heave force sensing base 54 at the bottom end of the sliding rod 52, and a movable soil retaining device 55 is provided between the frost heave force sensing base 54 and the vertical pipe section of the L-shaped main pipe 51. Specifically, the frost heave force sensing base 54 is used to sense the frost heave force of the soil and drive the sliding rod 52 to move upward under the frost heave force. Before frost heave occurs, the bottom end of the sliding rod 52 should extend out of the bottom of the vertical pipe section of the L-shaped main pipe 51 to reserve a movable margin for upward movement, and the area of ​​the frost heave force sensing base 54 should be large enough to be larger than the horizontal area of ​​the vertical pipe section of the L-shaped main pipe 51. Cross-sectional area, in order to fully receive the effect of frost heave force, the frost heave force sensing base 54 of the utility model includes a circular base plate 541, and a hemispherical structure 542 is designed on the bottom surface of the base plate 541, which helps it to fully receive the frost heave force of the surrounding soil body and convert the frost heave force into a vertical upward force, thereby pushing the sliding rod 52 to move upward; the effect of the movable soil retaining device 55 is to avoid the frost heave force sensing base 54 from being subjected to the downward frost heave force of the soil body as much as possible, that is to say, to ensure that when frost heave occurs, the frost heave force sensing base 54 is only subjected to the upward frost heave force. By the movable soil retaining device 55, when backfilling the foundation soil, a movement space can be reserved between the frost heave force sensing base 54 and the bottom of the vertical pipe section of the L-shaped main pipe 51. This space does not have backfill soil and will not be subjected to the downward frost heave force of the soil body. At the same time, the movable soil retaining device 55 will not hinder the frost heave force sensing base 54 from moving upward.

[0034] Specifically, the movable soil retaining device 55 includes a top fixed cover 551 and N-stage sliding sleeves. In this embodiment, a two-stage sliding sleeve (i.e., N=2) is adopted, namely, a first-stage sliding sleeve 552 and a second-stage sliding sleeve 553. The first-stage sliding sleeve 552 is vertically slidably installed in the top fixed cover 551 through a slide 554, and the second-stage sliding sleeve 553 is vertically slidably installed in the first-stage sliding sleeve 552 through a slide 554. The second-stage sliding sleeve 553 is fixedly mounted on the frost heave force sensing base 54, and the top fixed cover 551 is fixedly mounted on the bottom of the vertical pipe section of the L-shaped main pipe 51. In this way, during backfilling, the movable soil retaining device 55 can block the backfill soil, and when frost heave occurs, the movable soil retaining device 55 can also prevent the surrounding soil from exerting a downward force on the frost heave force sensing base 54, and the N-stage sliding sleeve can be vertically extended and retracted, so it will not hinder the upward movement of the frost heave force sensing base 54.

[0035] Furthermore, it should be noted that the function of the combined structure formed by the mounting block 56, the limit plate 58 and the spring 57 is to provide a downward elastic force for the sliding rod 52, so that the movable soil retaining device 55 can remain in the expanded state during the backfilling process; and when the soil frost heaves, the force of the frost heave is so large that the sliding rod 52 can overcome the elastic force of the spring and move upward.

[0036] Furthermore, the front end of the transverse anchor rod 53 is a pointed structure, which facilitates outward penetration into the soil. The transverse anchor rod 53 is also provided with barbs 531, which facilitate stabilization in the soil after penetration. In addition, a limit ring 534 is provided at the front end of the transverse pipe section of the L-shaped main pipe 51 to limit the outward extension of the transverse anchor rod 53 and prevent it from falling out.

[0037] Furthermore, there are multiple frost heave piercing mechanisms 5 , which are evenly distributed on the wall of the pile foundation tube 1 in a circumferential direction.

[0038] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A support foundation suitable for protecting vegetation in plateau permafrost areas, characterized by: It includes a pile foundation tube, a pile foundation tube top seat, a pile foundation tube base and a frost heave piercing mechanism; A pile foundation cylinder top seat is fixedly installed on the top of the pile foundation cylinder, and the pile foundation cylinder top seat is used to connect with the target to be supported; the pile foundation cylinder base is set at the bottom of the pile foundation cylinder, and a plurality of threaded drill rod assemblies are set on the pile foundation cylinder base for fixing with the foundation; The frost heave piercing mechanism is fixedly installed on the cylinder wall of the pile foundation cylinder, and the frost heave piercing mechanism comprises: an L-shaped main pipe, a sliding rod, a transverse anchor rod, a frost heave force sensing base and a movable soil retaining device, wherein the L-shaped main pipe comprises a transverse pipe section and a vertical pipe section at the top, a mounting block is fixedly provided inside the vertical pipe section of the L-shaped main pipe, the sliding rod is vertically slidably installed in the mounting block, a limiting plate is fixedly provided at the middle position of the sliding rod, a spring is provided between the limiting plate and the mounting block, and a limiting protrusion is provided inside the bottom end of the vertical pipe section of the L-shaped main pipe for limiting the limiting plate; a first piston is provided at the top end of the sliding rod; the transverse anchor rod is slidably installed in the transverse pipe section of the L-shaped main pipe, and a second piston is provided at the tail end of the transverse anchor rod; the interior of the L-shaped main pipe between the first piston and the second piston is filled with hydraulic oil; A frost heave force sensing base is arranged at the bottom end of the sliding rod, and a movable soil retaining device is arranged between the frost heave force sensing base and the vertical pipe section of the L-shaped main pipe.

2. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1 is characterized by: The base of the pile foundation cylinder is in the shape of an inverted cone.

3. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1 is characterized by: The threaded drill rod assembly includes a threaded barrel, a threaded drill rod and a protective cap. The threaded barrel is fixedly set on the base of the pile foundation barrel. The threaded drill rod is installed in the threaded barrel through a thread. The threaded drill rod is used to drill into the foundation. The protective cap is installed on the top of the threaded drill rod.

4. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1 is characterized by: A frost heave piercing mechanism mounting frame is provided on the cylinder wall of the pile foundation cylinder, and the frost heave piercing mechanism is fixed on the frost heave piercing mechanism mounting frame.

5. The support foundation for protecting vegetation in plateau permafrost areas according to claim 4 is characterized in that: A transverse retaining arm is provided on the frost heave piercing mechanism mounting frame, and a transverse pipe section at the top of the L-shaped main pipe is fixedly welded to the transverse retaining arm.

6. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1 is characterized by: The movable earth retaining device includes a top fixed cover and N-level sliding sleeves, where N is greater than or equal to 2. The top fixed cover is fixedly sleeved on the bottom of the vertical pipe section of the L-shaped main pipe, and the N-level sliding sleeves are slidably sleeved in sequence. Among them, the uppermost sliding sleeve is vertically slidably installed in the top fixed cover, and the lowermost sliding sleeve is fixedly sleeved on the frost heave force sensing base.

7. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1 is characterized by: The front end of the transverse anchor rod is a tip structure.

8. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1 is characterized by: The transverse anchor rod is also provided with barbs.

9. The support foundation for protecting vegetation in plateau permafrost areas according to claim 1, characterized in that: A limiting ring is also provided at the front end of the transverse pipe section of the L-shaped main pipe to limit the extreme position of the transverse anchor rod being ejected outward.

10. The support foundation suitable for protecting vegetation in plateau permafrost areas according to claim 1, characterized in that: There are multiple frost heave piercing mechanisms, which are evenly distributed on the wall of the pile foundation tube in a circumferential direction.

Images