CN115059122A - Pile foundation anti-freezing and pulling device - Google Patents
Pile foundation anti-freezing and pulling device Download PDFInfo
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- CN115059122A CN115059122A CN202210767539.4A CN202210767539A CN115059122A CN 115059122 A CN115059122 A CN 115059122A CN 202210767539 A CN202210767539 A CN 202210767539A CN 115059122 A CN115059122 A CN 115059122A
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- 238000007710 freezing Methods 0.000 title claims abstract description 12
- 244000035744 Hura crepitans Species 0.000 claims abstract description 44
- 239000002689 soil Substances 0.000 claims abstract description 27
- 238000003780 insertion Methods 0.000 claims description 29
- 230000037431 insertion Effects 0.000 claims description 29
- 239000004576 sand Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 208000001034 Frostbite Diseases 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 108010053481 Antifreeze Proteins Proteins 0.000 claims 7
- 230000002528 anti-freeze Effects 0.000 claims 7
- 230000000694 effects Effects 0.000 abstract description 19
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 238000010257 thawing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002968 anti-fracture Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/14—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against frost heaves in soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a pile foundation anti-freezing pulling device, which solves the problem that the connecting position of a movable plate and a sliding sleeve is easy to break when in use. This device is at the pre-buried pressure release pipe of a plurality of vertical settings in the underground of the circumference of fly leaf, the upper end of pressure release pipe is connected and is communicate with the bottom of establishing subaerial annular sandbox, and set up a plurality of pressure release logical grooves that are located the activity layer that set up along its circumference interval on the lateral wall of pressure release pipe, make when the activity layer moves, the produced tangential force of activity layer in the region between pressure release pipe and the sleeve pipe, extrude the intraformational soil body of a part activity in the pressure release pipe, and constantly rebound along the pressure release pipe is inside, realize reducing the purpose of the tangential force of the activity layer in the region between pressure release pipe and the sleeve pipe, and then reduce the activity layer and freeze the power of pulling out to fly leaf and sleeve pipe formed tangential, improve the anti-deformation of fly leaf and bushing department, fracture resistance, the life of the device has been improved.
Description
Technical Field
The invention relates to the field of pile engineering, in particular to a pile foundation anti-freezing pulling device.
Background
The permafrost area of China is about 22 percent of the area of the national soil, especially in the northeast region, the permafrost is widely distributed, and because of the regionality and high water-bearing property of the distribution of the permafrost, severe frost damage problems such as frost heaving, thawing sinking, freezing and pulling and the like occur in highway engineering, oil transportation engineering and electric power pile engineering in China; the pile column in the frozen soil area can be subjected to frost heaving force generated by deformation and uplift of a soil body, the pile column part arranged under the stratum directly acts with the soil body, and during frost heaving and thawing settlement of the soil body, unequal displacement of the bottom of the pile column easily causes the freezing and pulling phenomenon of the pile column, so that the pile column can be toppled over to bring engineering damage.
In order to prevent the inclination of the pile, the document with application number 2020105249533 discloses a pile foundation anti-freezing device, however, the device has the following problems when in use: when the freeze thawing circulation takes place for the movable floor, the sliding sleeve receives ascending tangential freeze-pull power that frozen soil applyed, under the direction of gag lever post, the sliding sleeve drives fly leaf upward movement, and the frozen soil of fly leaf top can give fly leaf a reverse resistance, hinder fly leaf upward movement, at this time because the shear force of a large amount of upper and lower directions concentrates on the hookup location department of fly leaf and sliding sleeve, can lead to the hookup location of fly leaf and sliding sleeve to take place the fracture easily when using, and the hookup location of fly leaf and sliding sleeve is located the underground, be difficult to carry out real-time supervision to it, damage the part also is difficult to change, therefore, need carry out certain improvement to the device, shear force that receives when being in the use with the hookup location that reduces fly leaf and sliding sleeve, improve the device's life.
Disclosure of Invention
The invention provides a pile foundation anti-freezing and anti-pulling device, aiming at solving the problem that the connecting position of a movable plate and a sliding sleeve is easy to break when in use in the background technology.
The technical scheme of the invention is as follows: an anti-freezing pulling device for a pile foundation comprises an underground embedded device used for being installed underground;
the underground pre-buried device comprises a base arranged in a frozen soil layer, a vertically arranged stabilizing cylinder is fixedly arranged at the top of the base, the upper end of the stabilizing cylinder extends to the bottom of the movable layer, a sleeve capable of moving up and down is inserted in the stabilizing cylinder in a sliding manner, the upper end of the sleeve extends to the ground, the stabilizing cylinder and the sleeve are both used for being sleeved on a pile, the lower end of the pile abuts against the base, a horizontally arranged movable plate is fixedly arranged on the sleeve, and the movable plate is positioned in the movable layer;
the cover is equipped with gliding pressure relief device from top to bottom on the sleeve pipe, and pressure relief device includes along the pre-buried a plurality of pressure release pipes in underground of the circumference of fly leaf, and the pressure release pipe is penetrating hollow tube structure from top to bottom, sets up on the lateral wall of pressure release pipe along a plurality of pressure release logical grooves that its circumference interval set up, and the pressure release leads to the groove and is penetrating about the direction and inside and outside along, and the pressure release leads to the groove and is located the active layer.
Preferably, the auxiliary pressure relief device comprises an annular sandbox with an upper opening, the annular sandbox is of an annular closed box body structure, a central pipe hole which is through up and down is formed in the middle of the annular sandbox and is used for a sleeve and a pile to penetrate through, the bottom of the annular sandbox is connected with the pressure relief pipe, and a flow hole which corresponds to the pipe hole of the pressure relief pipe up and down is formed in the bottom of the annular sandbox;
fine sand is filled in the inner part of the annular sandbox and the pressure relief pipe, and a gap is reserved between the upper surface of the fine sand in the annular sandbox and the top of the annular sandbox.
Preferably, the annular sandbox comprises an annular box body with an upper opening and an annular cover covering the top of the annular box body, the annular cover is detachably connected with the annular box body, an annular chamber is formed in the annular box body, and the flowing hole and the fine sand are located in the annular chamber.
Preferably, the annular cover is provided with a plurality of material level sensors, the material level sensors correspond to the flow holes up and down, and the material level sensors are used for monitoring the rising height of fine sand at the flow holes.
Preferably, a gap is reserved between the lower end of the pressure relief pipe and the interface of the movable layer and the frozen soil layer.
Preferably, the pressure relief pipe comprises a pre-buried pipe and an insertion pipe, the pre-buried pipe is pre-buried in the movable layer, the insertion pipe is movably inserted in the pre-buried pipe, and the outer diameter of the insertion pipe is equal to the inner diameter of the pre-buried pipe;
the side wall of the insertion pipe is provided with at least two first pressure relief through grooves at equal intervals along the circumferential direction, the top of the insertion pipe is detachably and fixedly connected with the bottom of the annular sandbox, and pipe holes of the insertion pipe correspond to the flow holes up and down;
at least two second pressure relief through grooves are formed in the side wall of the embedded pipe along the circumferential direction of the embedded pipe at equal intervals, and the second pressure relief through grooves correspond to the first pressure relief through grooves in and out, so that the second pressure relief through grooves can be communicated with the first pressure relief through grooves.
Preferably, the pressure relief device comprises a sliding sleeve which is sleeved on the sleeve in an up-and-down sliding mode, a plurality of connecting rods are vertically and fixedly arranged on the side wall of the sliding sleeve along the circumferential direction of the sliding sleeve at equal intervals, and one end, far away from the sliding sleeve, of each connecting rod is fixedly connected with the embedded pipe.
Preferably, the sleeve is fixedly provided with two movable plates at intervals along the vertical direction, the sleeve is sleeved with two sliding sleeves arranged at intervals up and down, and the sliding sleeves and the movable plates are alternately arranged on the sleeve up and down.
Preferably, the inner wall of the embedded pipe is provided with a chute which extends along the vertical direction and is provided with an upper opening, and the chute is positioned between the second pressure relief through grooves;
the outer wall of the insertion pipe is fixedly provided with a slide bar which extends along the vertical direction, and the slide bar is arranged in the sliding groove in a vertical sliding manner.
Preferably, the inner wall of the sleeve is embedded with a rotatable ball, and the ball is in rolling contact with the surface of the pile.
The invention has the advantages that: this device is at the pre-buried pressure release pipe of a plurality of vertical settings in the underground of the circumference of fly leaf, the upper end of pressure release pipe is connected and communicates with the bottom of establishing subaerial annular sandbox, and set up a plurality of pressure release logical grooves that are located the activity layer that set up along its circumference interval on the lateral wall of pressure release pipe, make when the activity layer moves, the produced tangential force of activity layer in the region between pressure release pipe and the sleeve pipe, extrude some intraformational soil body of activity in the pressure release pipe, and constantly rebound along the inside pipe channel of pressure release pipe, realize reducing the purpose of the tangential force of activity layer in the region between pressure release pipe and the sleeve pipe, and then reduce the activity layer and freeze the power of drawing to fly leaf and sleeve pipe formed tangential, improve the anti-deformation of fly leaf and bushing department, anti-fracture performance, the life of the device has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the structure of example 1 in use;
FIG. 2 is a schematic view of the main structure in example 1;
FIG. 3 is a schematic view of the underground embedding device shown in FIG. 1;
FIG. 4 is a schematic structural diagram of the auxiliary force-discharging device in FIG. 1;
FIG. 5 is a schematic view of the internal structure of the ring sandbox of FIG. 4;
FIG. 6 is a schematic top view of the structure of FIG. 5;
FIG. 7 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 8 is a cross-sectional view taken at A-A of FIG. 3;
in the figure, 1, a frozen soil layer, 2, a movable layer, 3, a base, 4, a drill rod, 5, a stable cylinder, 6, a sleeve, 601, an outer semicircular pipe, 602, an inner semicircular pipe, 603, a ball, 604, a welding seam, 7, a pile, 8, an annular sandbox, 801, a flow hole, 802, a first annular side wall, 9, an annular cover, 901, a second annular side wall, 10, a material level sensor, 11, a pull ring, 12, a connecting plate, 13, an insertion pipe, 1301, a first pressure relief through groove, 1302, a sliding strip, 14, a pre-embedded pipe, 1401, a second pressure relief through groove, 15, a connecting rod, 16, a sliding sleeve, 17, a movable plate, 18, a central pipe hole, 19 and fine sand.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example 1: a pile foundation anti-freezing and anti-pulling device is shown in figures 1 and 2 and comprises an underground embedded device and an auxiliary force release device, wherein the underground embedded device is used for being installed underground, and the auxiliary force release device is used for being installed on the ground.
The auxiliary force release device comprises an annular sandbox 8 with an upper opening, the annular sandbox 8 is of an annular closed box structure, and a central tube hole 18 which is through up and down is formed in the middle of the annular sandbox 8.
As shown in fig. 3, the underground embedding device comprises a base 3 arranged in a frozen soil layer 1, and a plurality of drill rods 4 are welded at the bottom of the base 3 so as to improve the anti-toppling capability of the base 3.
The top of base 3 is fixed and is equipped with a firm section of thick bamboo 5 of vertical setting, and the upper end of a firm section of thick bamboo 5 extends to the bottom of activity layer 2, and it is equipped with sleeve pipe 6 that can move about from top to bottom to slide in a firm section of thick bamboo 5, and the upper end of sleeve pipe 6 extends to subaerial, and a firm section of thick bamboo 5 and sleeve pipe 6 all are used for the cover to establish on stake 7, and the lower extreme of stake 7 supports and leans on base 3. The upper ends of the sleeve 6 and the pile 7 each pass through the central bore 18.
As shown in fig. 8, the jacket 6 in this embodiment includes an inner and outer double-walled tube structure in which an outer tube and an inner tube are nested. Wherein outer pipe includes and is formed by two outer semicircle pipes 601 welding, has seted up the hemisphere recess on the outer semicircle pipe 601, is equipped with ball 603 that can rotate in the hemisphere recess, and the equipartition face of ball 603 is parallel and level with the medial surface of outer semicircle pipe 601.
The inner layer pipe is formed by welding two inner semi-circular pipes 602. The inner semicircular pipe 602 is provided with a round hole corresponding to the ball 603, and the inner diameter of the round hole is smaller than the radius of the ball 603, so that the ball 603 can be pressed in the hemispherical groove by the inner semicircular pipe 602, and can not be separated from the hemispherical groove. Wherein, the ends of the inner semicircular pipe 602 and the outer semicircular pipe 601 are connected into a whole by welding.
The balls 603 are in rolling contact with the surface of the post 7 to reduce wear on the surface of the post 7 as the sleeve 6 moves upwards.
In order to avoid the problems that the movable plate 17 is deformed easily due to excessive stress and the joint between the movable plate 17 and the sleeve 6 is easy to break when a single movable plate 17 is arranged, two movable plates 17 are welded on the sleeve 6 at intervals along the vertical direction in the embodiment, and the movable plates 17 are all located in the movable layer 2.
The cover is equipped with gliding pressure relief device from top to bottom on the sleeve pipe 6, and pressure relief device includes along the circumference pre-buried at a plurality of pressure release pipes in underground of fly leaf 17, and the pressure release pipe is upper and lower penetrating hollow tube structure, has the clearance between the lower extreme of pressure release pipe and the interface of active layer 2 and frozen soil layer 1.
Set up on the lateral wall of pressure release pipe and lead to the groove along a plurality of pressure releases that its circumference interval set up, the pressure release leads to the groove along upper and lower direction and inside and outside penetrating, and the pressure release leads to the groove to be located the movable layer 2.
The bottom of the annular sandbox 8 is connected with the pressure relief pipe, and the bottom of the annular sandbox 8 is provided with a flow hole 801 which corresponds to the pipe hole of the pressure relief pipe up and down.
The function of the pressure relief pipe is as follows: when the movable layer 2 moves, the tangential force generated by the movable layer 2 in the area between the pressure relief pipe and the sleeve 6 extrudes a part of soil in the movable layer 2 into the pressure relief pipe and continuously moves upwards along the pipe passage inside the pressure relief pipe, so that the purpose of reducing the tangential force of the movable layer 2 in the area between the pressure relief pipe and the sleeve 6 is realized, and the tangential freeze-drawing force of the movable layer 2 on the movable plate 17 and the sleeve 6 is further reduced.
The under shed of pressure release pipe is established in activity layer 2 for the soil body of activity layer 2 of lower part can get into in the pressure release pipe along the under shed of pressure release pipe under the effect that frost heaving melted sinking, gets into the inside passageway entry area of pressure release pipe with the soil body that enlarges activity layer 2, reduces the squeezing action of activity layer 2 to the pipe wall of pressure release pipe.
In order to enhance the structural strength of the pressure relief pipe and facilitate maintenance and replacement of the pressure relief pipe, the pressure relief pipe is designed to be an inner-outer double-layer pipe structure in the embodiment, specifically, as shown in fig. 3 and 4, the pressure relief pipe includes a pre-embedded pipe 14 and an insertion pipe 13, the pre-embedded pipe 14 is pre-embedded in the movable layer 2, the insertion pipe 13 is movably inserted in the pre-embedded pipe 14, the outer diameter of the insertion pipe 13 is equal to the inner diameter of the pre-embedded pipe 14, and the insertion pipe 13 is flush with the lower end of the pre-embedded pipe 14.
Four first pressure relief through grooves 1301 are formed in the side wall of the insertion pipe 13 at equal intervals along the circumferential direction of the insertion pipe, an annular connecting plate 12 is welded to the top of the insertion pipe 13, the connecting plate 12 is connected with the bottom of the annular sand box 8 through bolts, and pipe holes of the insertion pipe 13 correspond to the flow holes 801 vertically.
Four second pressure relief through grooves 1401 are formed in the side wall of the embedded pipe 14 at equal intervals along the circumferential direction of the embedded pipe, and the second pressure relief through grooves 1401 correspond to the first pressure relief through grooves 1301 in the inside and outside so that the second pressure relief through grooves 1401 can be communicated with the first pressure relief through grooves 1301.
In order to quickly correspond the second pressure release through groove 1401 to the first pressure release through groove 1301 during the assembly of the pressure release pipe, as shown in fig. 4 and 7, in this embodiment, a sliding groove extending in the vertical direction and having an upper opening is formed on the inner wall of the embedded pipe 14, and the sliding groove is located between the second pressure release through grooves 1401. A slide bar 1302 extending in the up-down direction is fixed on the outer wall of the insertion tube 13, and the slide bar 1302 is arranged in the sliding groove in a sliding manner.
The cooperation of the sliding bar 1302 and the sliding groove provides positioning for the second pressure relief channel 1401 and the first pressure relief channel 1301.
In order to improve the anti-extrusion capability of the insertion pipe 13 and the embedded pipe 14 during use and visually observe the height of the ground surface of the movable layer 2 during frost heaving and thawing sinking process so that maintenance personnel can timely overhaul the movable layer, in the embodiment, the inside of the annular sandbox 8 and the insertion pipe 13 are filled with fine sand 19, and as shown in fig. 5, a gap exists between the upper surface of the fine sand 19 in the annular sandbox 8 and the top of the annular sandbox 8.
The top of the annular sandbox 8 is embedded with a plurality of level sensors 10, the level sensors 10 correspond to the flow holes 801 up and down, and the level sensors 10 are used for monitoring the rising height of the fine sand 19 at the flow holes 801.
In order to facilitate sand filling and overhaul of the inside of the annular sandbox 8, as shown in fig. 5, the annular sandbox 8 in the present embodiment includes an annular box body with an upper opening and an annular cover 9 covering the top of the annular box body, the annular cover 9 is detachably connected to the annular box body, an annular chamber is formed in the annular box body, and the flow hole 801 and the fine sand 19 are both located in the annular chamber.
The level sensor 10 is embedded in the annular cover 9. In order to facilitate lifting of the annular cover 9, the annular cover 9 in this embodiment is also fixedly provided with a pull ring 11 made of steel.
In order to save material cost and improve the weight of the annular sandbox 8 so as to prevent the annular sandbox 8 from slipping due to the influence of wind power when in use and generate shearing action on the pile 7, the sleeve 6 and the pressure relief pipe, the annular box body and the annular cover 9 of the annular sandbox 8 are both prefabricated by pouring concrete through a mould.
In order to improve the stability of the pressure relief pipe during use and avoid the situation that the lower end of the pressure relief pipe is a free end, and when the movable layer 2 moves, the lower end of the pressure relief pipe deflects to cause the middle of the pressure relief pipe to bend, as shown in fig. 2, in this embodiment, the pressure relief device includes a sliding sleeve 16 which is sleeved on the sleeve 6 in an up-and-down sliding manner, and the sliding sleeve 16 and the movable plate 17 are alternately arranged on the sleeve 6 up and down.
The working principle is as follows: when the movable layer 2 moves in the process of frost heaving and thawing sinking, the tangential force generated by the movable layer 2 in the area between the pressure relief pipe and the sleeve 6 extrudes part of soil in the upper area and the lower area of the movable layer 2 into the pressure relief pipe from the lower end opening of the pressure relief pipe and the pressure relief through groove respectively, at the moment, the fine sand 19 in the pressure relief pipe is pushed upwards, and part of the fine sand 19 in the pressure relief pipe enters the annular sandbox 8 from the flow hole 801 to complete the pressure relief movement.
In the pressure relief process, the material level sensor 10 monitors the rising height of the fine sand 19 in the annular sandbox 8 at the position of the flowing hole 801 in real time, so that the rising height of the ground surface in the frost heaving and thawing settlement process is marked out visually, and a maintainer can overhaul the sand in time.
The pressure relief pipe realizes the purpose of reducing the tangential force of the active layer 2 in the area between the pressure relief pipe and the sleeve 6, and further reduces the tangential freeze-drawing force formed by the active layer 2 on the active plate 17 and the sleeve 6.
In the pressure relief process, a part of residual power of the active layer 2 in the area between the pressure relief pipe and the sleeve 6 forms upward tangential freeze-drawing force on the sleeve 6 to push the sleeve 6 to move upwards, frozen soil above the active plate 17 can provide reverse resistance for the active plate 17 to block the active plate 17 from moving upwards, and the freeze-drawing effect of the sleeve 6 can be weakened.
The sleeve 6 is sleeved outside the pile 17 in a sliding manner to replace the tangential freeze-pulling force generated when the pile 17 bears the movement of the movable layer 2, so that the pile 17 is prevented from being pulled out.
The base 3, the drill rod 4 and the stabilizing cylinder 5 are arranged in the frozen soil layer 1 which can not move and are used as a fixed foundation to prevent the pile 17 and the sleeve 6 from inclining.
Moreover, the frost heaving and thawing process is stopped, after the external air temperature rises, ice crystals in the moving layer 2 melt, so that a certain gap can be formed between soil bodies, fine sand 19 can flow downwards at the moment, the soil gap in the moving layer 2 in the region between the pressure relief pipe and the sleeve 6 is filled, the compactness of the soil body in the moving layer 2 in the region between the pressure relief pipe and the sleeve 6 is improved, and the problem that the pile 7 is prone to topple over due to the fact that a large number of gaps exist in the soil body in the moving layer 2 near the pile 7 is solved.
Example 2: the utility model provides a stake basis prevents frostbite and pulls out device, in this embodiment, sleeve pipe 6 no longer sets up sliding sleeve 16 and connecting rod 15. The other structure is the same as embodiment 1.
Example 3: in the embodiment, the lower end of a pressure relief pipe extends into a frozen soil layer 1. The other structure is the same as embodiment 2.
Example 4: in the embodiment, the pressure relief pipe and the annular sandbox 8 are not filled with fine sand 19 any more, and the top of the annular sandbox 8 is not provided with the material level sensor 10 any more. The other structure is the same as embodiment 1.
Example 5: the utility model provides a device is pulled out in stake basis prevents frostbite, and in this embodiment, three flow hole 801 has been seted up along its circumference equidistance in the bottom of annular sandbox 8. Correspondingly, the vertical direction of the pressure relief pipe and the liquid level sensor 10 is 3. The other structure is the same as embodiment 1.
Example 5: in the embodiment, two first pressure relief through grooves 1301 are formed in the side wall of an insertion pipe 13 at equal intervals along the circumferential direction of the insertion pipe, and correspondingly, two second pressure relief through grooves 1401 are formed in the side wall of a pre-buried pipe 14 at equal intervals along the circumferential direction of the pre-buried pipe. The other structure is the same as embodiment 1.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a stake basis prevents frostbite and pulls out device which characterized in that: comprises an underground embedded device used for being installed underground;
the underground embedded device comprises a base (3) arranged in a frozen soil layer (1), a vertically-arranged stabilizing cylinder (5) is fixedly arranged at the top of the base (3), the upper end of the stabilizing cylinder (5) extends to the bottom of the movable layer (2), a sleeve (6) capable of moving up and down is inserted in the stabilizing cylinder (5) in a sliding mode, the upper end of the sleeve (6) extends to the ground, the stabilizing cylinder (5) and the sleeve (6) are both sleeved on a pile (7), the lower end of the pile (7) abuts against the base (3), a horizontally-arranged movable plate (17) is fixedly arranged on the sleeve (6), and the movable plate (17) is located in the movable layer (2);
the cover is equipped with gliding pressure relief device from top to bottom on sleeve pipe (6), and pressure relief device includes along the pre-buried a plurality of pressure release pipes in underground of the circumference of fly leaf (17), and the pressure release pipe is upper and lower penetrating hollow tube structure, and the upper end and the ground parallel and level of pressure release pipe set up a plurality of pressure release logical grooves that set up along its circumference interval on the lateral wall of pressure release pipe, and the pressure release leads to the groove and follows upper and lower direction and inside and outside penetrating, and the pressure release leads to the groove and is located movable layer (2).
2. The pile foundation anti-freezing pulling device of claim 1, wherein: the device is characterized by further comprising an auxiliary pressure relief device arranged on the ground, wherein the auxiliary pressure relief device comprises an annular sandbox (8) with an upper opening, the annular sandbox (8) is of an annular closed box structure, a vertically through central pipe hole (18) is formed in the middle of the annular sandbox (8), the central pipe hole (18) is used for a sleeve (6) and a pile column (7) to penetrate through, the bottom of the annular sandbox (8) is connected with a pressure relief pipe, and a flow hole (801) vertically corresponding to the pipe hole of the pressure relief pipe is formed in the bottom of the annular sandbox (8);
fine sand (19) are filled in the inner part of the annular sand box (8) and the pressure relief pipe, and a gap is reserved between the upper surface of the fine sand (19) in the annular sand box (8) and the top of the annular sand box (8).
3. The pile foundation anti-freeze pulling device of claim 2, wherein: annular sandbox (8) include that the annular box of upper shed and lid establish annular lid (9) at annular box top, annular lid (9) and annular box releasable connection, are formed with annular chamber in the annular box, and flow hole (801) and fine sand (19) all are located the annular chamber.
4. The pile foundation anti-freeze pulling device of claim 3, wherein: a plurality of material level sensors (10) are arranged on the annular cover (9), the material level sensors (10) correspond to the flow holes (801) up and down, and the material level sensors (10) are used for monitoring the rising height of the fine sand (19) at the flow holes (801).
5. The pile foundation anti-freeze pulling device of any one of claims 1 to 4, wherein: a gap is reserved between the lower end of the pressure relief pipe and the joint surface of the movable layer (2) and the frozen soil layer (1).
6. The pile foundation anti-freeze pulling device of any one of claims 2 to 4, wherein: the pressure relief pipe comprises a pre-buried pipe (14) and an insertion pipe (13), the pre-buried pipe (14) is pre-buried in the movable layer (2), the insertion pipe (13) is movably inserted in the pre-buried pipe (14), and the outer diameter of the insertion pipe (13) is equal to the inner diameter of the pre-buried pipe (14);
at least two first pressure relief through grooves (1301) are formed in the side wall of the insertion pipe (13) at equal intervals along the circumferential direction of the insertion pipe, the top of the insertion pipe (13) is detachably and fixedly connected with the bottom of the annular sandbox (8), and pipe holes of the insertion pipe (13) correspond to the flow holes (801) up and down;
at least two second pressure relief through grooves (1401) are formed in the side wall of the embedded pipe (14) along the circumferential direction of the embedded pipe at equal intervals, the second pressure relief through grooves (1401) correspond to the first pressure relief through grooves (1301) in an inner-outer mode, and therefore the second pressure relief through grooves (1401) can be communicated with the first pressure relief through grooves (1301).
7. The pile foundation anti-freezing pulling device of claim 6, wherein: the pressure relief device comprises a sliding sleeve (16) which is sleeved on the sleeve (6) in an up-and-down sliding manner, a plurality of connecting rods (15) are vertically and fixedly arranged on the side wall of the sliding sleeve (16) along the circumferential direction at equal intervals, and one end, far away from the sliding sleeve (16), of each connecting rod (15) is fixedly connected with the embedded pipe (14).
8. The pile foundation anti-freeze pulling device of claim 7, wherein: two movable plates (17) are fixedly arranged on the sleeve (6) at intervals along the vertical direction, two sliding sleeves (16) which are arranged at intervals up and down are sleeved on the sleeve (6), and the sliding sleeves (16) and the movable plates (17) are alternately arranged up and down on the sleeve (6).
9. The pile foundation anti-freeze pulling device of claim 7 or 8, wherein: the inner wall of the embedded pipe (14) is provided with a sliding chute which extends along the vertical direction and is provided with an opening at the upper part, and the sliding chute is positioned between the second pressure relief through grooves (1401);
a sliding strip (1302) extending along the vertical direction is fixedly arranged on the outer wall of the insertion pipe (13), and the sliding strip (1302) is arranged in the sliding groove in a vertical sliding mode.
10. The pile foundation anti-freeze pulling device of any one of claims 1 to 4, wherein: the inner wall of the sleeve (6) is embedded with a rotatable ball (603), and the ball (603) is in rolling contact with the surface of the pile (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210767539.4A CN115059122B (en) | 2022-07-01 | 2022-07-01 | Pile foundation anti-freezing and anti-pulling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210767539.4A CN115059122B (en) | 2022-07-01 | 2022-07-01 | Pile foundation anti-freezing and anti-pulling device |
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| CN115059122A true CN115059122A (en) | 2022-09-16 |
| CN115059122B CN115059122B (en) | 2024-01-26 |
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| CN202210767539.4A Active CN115059122B (en) | 2022-07-01 | 2022-07-01 | Pile foundation anti-freezing and anti-pulling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115492169A (en) * | 2022-10-20 | 2022-12-20 | 中国科学院西北生态环境资源研究院 | Flexible anti-freezing pulling device and anti-freezing pulling method thereof |
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| CA1076822A (en) * | 1978-03-29 | 1980-05-06 | Hallingplast A/S | Foundation pile |
| US4585681A (en) * | 1983-06-03 | 1986-04-29 | Nippon Kokan Kk | Frost damage proofed pile |
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| CN115492169A (en) * | 2022-10-20 | 2022-12-20 | 中国科学院西北生态环境资源研究院 | Flexible anti-freezing pulling device and anti-freezing pulling method thereof |
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| CN115059122B (en) | 2024-01-26 |
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