CN115059122B - Pile foundation anti-freezing and anti-pulling device - Google Patents
Pile foundation anti-freezing and anti-pulling device Download PDFInfo
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- CN115059122B CN115059122B CN202210767539.4A CN202210767539A CN115059122B CN 115059122 B CN115059122 B CN 115059122B CN 202210767539 A CN202210767539 A CN 202210767539A CN 115059122 B CN115059122 B CN 115059122B
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- pipe
- pressure relief
- annular
- sleeve
- grooves
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- 238000007710 freezing Methods 0.000 title abstract description 7
- 244000035744 Hura crepitans Species 0.000 claims abstract description 46
- 239000002689 soil Substances 0.000 claims abstract description 26
- 238000003780 insertion Methods 0.000 claims description 26
- 230000037431 insertion Effects 0.000 claims description 26
- 239000004576 sand Substances 0.000 claims description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 108010053481 Antifreeze Proteins Proteins 0.000 claims 9
- 230000002528 anti-freeze Effects 0.000 claims 9
- 208000001034 Frostbite Diseases 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 230000002968 anti-fracture Effects 0.000 abstract description 2
- 238000010257 thawing Methods 0.000 description 8
- 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
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 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
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011178 precast concrete Substances 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
Classifications
-
- 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
-
- 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
-
- 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
Abstract
The invention provides an anti-freezing and anti-pulling device for a pile foundation, which solves the problem that the connection position of a movable plate and a sliding sleeve is easy to break when in use. This device is pre-buried a plurality of vertical pressure release pipes of setting in the underground of the circumference of fly leaf, the upper end of pressure release pipe is connected and is linked together with the bottom of establishing at subaerial annular sandbox, and set up a plurality of pressure release logical grooves that are located the activity in situ along its circumference interval setting 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, in the pressure release pipe is extruded the soil body in a portion activity in situ, and follow the inside pipe passageway of pressure release pipe and constantly upwards remove, 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 tangential frost-pull force that the activity layer formed fly leaf and sleeve pipe, improve the anti deformation of fly leaf and sleeve pipe junction, anti fracture performance, the life of the device has been improved.
Description
Technical Field
The invention relates to the field of pile engineering, in particular to an anti-freezing and anti-pulling device for a pile foundation.
Background
The permafrost area of China accounts for about 22% of the territorial area of China, particularly in northeast China, the permafrost is widely distributed, and due to the regional nature and high water content of the permafrost distribution, serious frost damage problems such as frost heaving, thawing, frost heaving and the like occur in highway engineering, oil transportation engineering and electric pile engineering which are positioned in the permafrost; for the pile in the frozen soil area, frost heaving force is generated due to deformation and uplift of the soil body, the pile part arranged under the stratum directly acts on the soil body, and in the frost heaving and thawing sinking process of the soil body, the unequal displacement of the bottom of the pile is easy to cause the phenomenon that the pile is frozen and pulled out, so that the pile is inclined to bring about engineering harm.
In order to prevent the pile from tilting, the document of application number 2020105249533 discloses a pile foundation anti-freeze-pull device, which however has the following problems when in use: when the movable layer takes place the freeze thawing circulation, the sliding sleeve receives the ascending tangential freeze pulling force that frozen soil applyed, under the direction of gag lever post, the sliding sleeve drives the fly leaf upward movement, and the frozen soil of fly leaf top can give a reverse resistance for the fly leaf, hinder the fly leaf upward movement, this time because a large amount of shearing forces of upper and lower directions concentrate in the hookup location department of fly leaf and sliding sleeve, can lead to the fly leaf to take place the fracture easily when using, and the hookup location of fly leaf and sliding sleeve is located underground, be difficult to carry out real-time supervision to it, damage part also is difficult to change, consequently, need carry out certain improvement to the device, in order to reduce the shearing force that the hookup location of fly leaf and sliding sleeve received when using, improve the life of the device.
Disclosure of Invention
In order to solve the problem that the connecting position of the movable plate and the sliding sleeve in the background technology is easy to break in use, the invention provides an anti-freezing and anti-pulling device for a pile foundation.
The technical scheme of the invention is as follows: the pile foundation anti-freezing and anti-pulling device comprises an underground pre-buried device which is used for being installed underground;
the underground pre-buried device comprises a base arranged in a frozen soil layer, wherein the top of the base is fixedly provided with a vertically arranged stabilizing cylinder, 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 sleeved on a pile, the lower end of the pile is propped against the base, the sleeve is fixedly provided with a horizontally arranged movable plate, and the movable plate is positioned in the movable layer;
the sleeve pipe is gone up the cover and is equipped with the pressure release device that can slide from top to bottom, and pressure release device includes a plurality of pressure release pipes of pre-buried underground along the circumference of fly leaf, and the pressure release pipe is the hollow tube structure of penetrating from top to bottom, has seted 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 logical groove is along upper and lower direction and inside and outside penetrating, and the pressure release logical groove is located the activity in situ.
Preferably, the auxiliary force release device comprises an annular sandbox with an upper opening, the annular sandbox is of an annular closed box body structure, the middle part of the annular sandbox is provided with a central pipe hole which is penetrated up and down, the central pipe hole is used for a sleeve pipe and a pile to penetrate through, the bottom of the annular sandbox is connected with a pressure release pipe, and the bottom of the annular sandbox is provided with a flow hole which corresponds to the pipe hole of the pressure release pipe up and down;
fine sand is filled in the annular sand box and the pressure relief pipe, and a gap is reserved between the upper surface of the fine sand in the annular sand box and the top of the annular sand box.
Preferably, the annular sandbox comprises an annular box body with an upper opening and an annular cover arranged at the top of the annular box body in a cover-detachable manner, an annular cavity is formed in the annular box body, and the flow hole and fine sand are both positioned in the annular cavity.
Preferably, the annular cover is provided with a plurality of material level sensors, the material level sensors correspond to the flow holes vertically, and the material level sensors are used for monitoring the rising height of fine sand at the flow holes.
Preferably, a gap exists 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 an embedded pipe and an insertion pipe, the embedded pipe is embedded in the movable layer, the insertion pipe is movably inserted in the embedded pipe, and the outer diameter of the insertion pipe is equal to the inner diameter of the embedded pipe;
at least two first pressure relief through grooves are formed in the side wall of the insertion pipe at equal intervals along the circumferential direction of the side wall of the insertion pipe, 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 vertically;
at least two second pressure relief through grooves are formed in the side wall of the embedded pipe at equal intervals along the circumferential direction of the side wall, and the second pressure relief through grooves correspond to the inside and the outside of the first pressure relief through grooves 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 sleeved on the sleeve in a vertically sliding manner, a plurality of connecting rods are vertically and fixedly arranged on the side wall of the sliding sleeve at equal intervals along the circumferential direction of the sliding sleeve, and one end of each connecting rod, which is far away from the sliding sleeve, is fixedly connected with the embedded pipe.
Preferably, two movable plates are fixedly arranged on the sleeve at intervals along the up-down direction, two sliding sleeves which are arranged at intervals up and down are sleeved on the sleeve, and the sliding sleeves and the movable plates are alternately arranged up and down on the sleeve.
Preferably, a chute which extends along the up-down direction and is provided with an upper opening is arranged on the inner wall of the embedded pipe, and the chute is positioned between the second pressure relief through grooves;
the outer wall of the cannula is fixedly provided with a slide bar extending along the up-down direction, and the slide bar is arranged in the chute in a up-down sliding way.
Preferably, rotatable balls are embedded on the inner wall of the sleeve, and the balls are in rolling contact with the surface of the pile.
The invention has the advantages that: this device is pre-buried a plurality of vertical pressure release pipes of setting in the underground of the circumference of fly leaf, the upper end of pressure release pipe is connected and is linked together with the bottom of establishing at subaerial annular sandbox, and set up a plurality of pressure release logical grooves that are located the activity in situ along its circumference interval setting 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, in the pressure release pipe is extruded the soil body in a portion activity in situ, and follow the inside pipe passageway of pressure release pipe and constantly upwards remove, 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 tangential frost-pull force that the activity layer formed fly leaf and sleeve pipe, improve the anti deformation of fly leaf and sleeve pipe junction, anti fracture performance, the life of the device has been improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of embodiment 1 in use;
fig. 2 is a schematic diagram of the main structure in embodiment 1;
FIG. 3 is a schematic view of the structure of the underground embedment device of FIG. 1;
FIG. 4 is a schematic diagram of the auxiliary force release device in FIG. 1;
FIG. 5 is a schematic view of the internal structure of the annular sandbox of FIG. 4;
FIG. 6 is a schematic view of the structure of FIG. 5 from a top view;
FIG. 7 is a cross-sectional view at A-A in FIG. 2;
FIG. 8 is a cross-sectional view at A-A in FIG. 3;
in the figure, 1, a frozen soil layer, 2, an active layer, 3, a base, 4, a drill rod, 5, a stabilizing 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, a cannula, 1301, a first pressure relief through groove, 1302, a slide bar, 14, an 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 following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
Example 1: the pile foundation anti-freezing and anti-pulling device comprises an underground pre-buried device for being installed underground and an auxiliary force release device for being installed on the ground as shown in fig. 1 and 2.
The auxiliary force release device comprises an annular sand box 8 with an upper opening, the annular sand box 8 is of an annular closed box body structure, and a central pipe hole 18 which is through from top to bottom is arranged in the middle of the annular sand box 8.
As shown in fig. 3, the underground pre-burying device comprises a base 3 arranged in the 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-tilting capability of the base 3.
The fixed firm section of thick bamboo 5 that is equipped with vertical setting in top of base 3, the upper end of firm section of thick bamboo 5 extends to the bottom of active layer 2, and the slip is inserted in firm section of thick bamboo 5 and is equipped with sleeve pipe 6 that can reciprocate, and the upper end of sleeve pipe 6 extends to subaerial, and 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 casing 6 and the pile 7 pass through the central tube hole 18.
As shown in fig. 8, the sleeve 6 in this embodiment includes an inner and outer double-layer tube structure in which an outer layer tube and an inner layer tube are nested. The outer tube is formed by welding two outer semicircular tubes 601, a hemispherical groove is formed in the outer semicircular tube 601, a ball 603 capable of rotating is arranged in the hemispherical groove, and the equal division surface of the ball 603 is flush with the inner side surface of the outer semicircular tube 601.
The inner tube is welded by two inner semicircular tubes 602. The inner semicircular tube 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 tube 602 without falling out from the hemispherical groove. Wherein the ends of the inner semicircle tube 602 and the outer semicircle tube 601 are connected as 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 upwardly.
In order to avoid the problems that when a single movable plate 17 is arranged, the movable plate 17 is stressed too much and is easy to deform, and the joint of the movable plate 17 and the sleeve 6 is easy to break, two movable plates 17 are welded on the sleeve 6 in the embodiment at intervals along the up-down direction, and the movable plates 17 are all positioned in the movable layer 2.
The sleeve 6 is sleeved with a pressure relief device capable of sliding up and down, the pressure relief device comprises a plurality of pressure relief pipes which are pre-buried underground along the circumferential direction of the movable plate 17, the pressure relief pipes are of an up-down transparent hollow pipe structure, and gaps are reserved between the lower ends of the pressure relief pipes and the joint surfaces of the movable layer 2 and the frozen soil layer 1.
A plurality of pressure relief through grooves which are arranged along the circumferential interval are formed in the side wall of the pressure relief pipe, the pressure relief through grooves are vertical and inner and outer through, and the pressure relief through grooves are positioned in the movable layer 2.
The bottom of annular sandbox 8 is connected with the pressure release pipe, and the flow hole 801 that corresponds about the tube hole of pressure release pipe is seted up to the bottom of annular sandbox 8.
The function of the pressure relief pipe: 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 body in the movable layer 2 into the pressure relief pipe and continuously moves upwards along a pipe channel in the pressure relief pipe, so that the aim of reducing the tangential force of the movable layer 2 in the area between the pressure relief pipe and the sleeve 6 is fulfilled, and the tangential freeze-pull force of the movable layer 2 to the movable plate 17 and the sleeve 6 is further reduced.
The lower opening of the pressure relief pipe is arranged in the movable layer 2, so that the soil body of the movable layer 2 at the lower part can enter the pressure relief pipe along the lower opening of the pressure relief pipe under the action of frost heaving and thawing sinking, the area of a channel inlet of the soil body of the movable layer 2 entering the pressure relief pipe is enlarged, and the extrusion action of the movable layer 2 on the pipe wall of the pressure relief pipe is reduced.
In order to strengthen the structural strength of the pressure relief pipe and facilitate maintenance and replacement of the pressure relief pipe, the pressure relief pipe is in an inner-outer double-layer pipe structure, specifically, as shown in fig. 3 and 4, the pressure relief pipe comprises an embedded pipe 14 and an insertion pipe 13, the embedded pipe 14 is embedded in the movable layer 2, the insertion pipe 13 is movably inserted in the embedded pipe 14, the outer diameter of the insertion pipe 13 is equal to the inner diameter of the embedded pipe 14, and the insertion pipe 13 is flush with the lower end of the 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 side wall, an annular connecting plate 12 is welded at the top of the insertion pipe 13, the connecting plate 12 is connected with the bottom of the annular sandbox 8 through bolts, and pipe holes of the insertion pipe 13 correspond to the flow holes 801 up and down.
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 side wall, and the second pressure relief through grooves 1401 correspond to the inside and the outside of the first pressure relief through grooves 1301, 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 relief through groove 1401 and the first pressure relief through groove 1301 when the pressure relief pipe is assembled, as shown in fig. 4 and 7, in this embodiment, a chute extending in the vertical direction and having an upper opening is formed on the inner wall of the embedded pipe 14, and the chute is located between the second pressure relief through grooves 1401. A slide bar 1302 extending in the up-down direction is fixedly arranged on the outer wall of the insertion tube 13, and the slide bar 1302 is arranged in the chute in a up-down sliding way.
The second pressure relief through groove 1401 and the first pressure relief through groove 1301 are correspondingly positioned by the matching of the slide bar 1302 and the slide groove.
In order to improve the extrusion resistance of the insertion pipe 13 and the embedded pipe 14 in use and enable the height of the surface bulge of the movable layer 2 to be intuitively observed in the frost heaving and thawing process so as to be convenient for maintenance personnel to overhaul in time, in the embodiment, fine sand 19 is filled in the annular sandbox 8 and the insertion pipe 13, and 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 as shown in fig. 5.
The top of annular sandbox 8 inlays and has a plurality of level sensor 10, and level sensor 10 corresponds from top to bottom with flow hole 801, and level sensor 10 is used for monitoring the uplift height of fine sand 19 of flow hole 801 department.
For the convenience of sand filling and maintenance of the inside of the annular sandbox 8, as shown in fig. 5, the annular sandbox 8 in this 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 with the annular box body, an annular chamber is formed in the annular box body, and the flow holes 801 and fine sand 19 are all located in the annular chamber.
The fill 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 annular sandbox 8 to avoid annular sandbox 8 to receive wind-force influence to appear sliding when using, produce shearing action to stake 7, sleeve pipe 6 and pressure release pipe, annular box and annular lid 9 of annular sandbox 8 all adopt the mould to pour the precast concrete and form.
In order to improve the stability of the pressure relief pipe during use, so as to avoid the situation that when the lower end of the pressure relief pipe is a free end and the movable layer 2 moves, the lower end of the pressure relief pipe deflects, so that the middle part of the pressure relief pipe bends, as shown in fig. 2, in this embodiment, the pressure relief device comprises a sliding sleeve 16 sleeved on the sleeve 6 in a vertically sliding manner, and the sliding sleeve 16 and a movable plate 17 are alternately arranged on the sleeve 6.
Working principle: when the movable layer 2 moves in the frost heaving and thawing process, 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 bodies 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, fine sand 19 in the pressure relief pipe is pushed upwards at the moment, and a part of fine sand 19 in the pressure relief pipe enters the annular sandbox 8 from the flow hole 801 to finish pressure relief movement.
In the pressure relief process, the material level sensor 10 monitors the elevation of fine sand 19 in the annular sandbox 8 at the flow hole 801 in real time so as to intuitively mark the elevation of the earth surface elevation in the frost heaving and thawing process, so that maintenance personnel can overhaul the annular sandbox in time.
The pressure release pipe realizes the purpose of reducing the tangential force of the movable layer 2 in the area between the pressure release pipe and the sleeve 6, and then reduces the tangential frozen-pulled force of the movable layer 2 on the movable plate 17 and the sleeve 6.
In the pressure release process, the residual power of the movable layer 2 in the area between the pressure release pipe and the sleeve 6 is partially formed into upward tangential frozen pulling force to the sleeve 6, the sleeve 6 is pushed to move upward, frozen soil above the movable plate 17 can provide reverse resistance to the movable plate 17, the upward movement of the movable plate 17 is blocked, and the frozen pulling effect of the sleeve 6 can be weakened.
The sleeve 6 is sleeved outside the pile 17 in a sliding way, so that the pile 17 is prevented from being pulled out by replacing tangential frozen pulling force generated when the pile 17 bears the motion of the movable layer 2.
The base 3, the drill rod 4 and the stabilizing cylinder 5 are arranged in the frozen soil layer 1 which does not move and serve as a fixed foundation to prevent the pile 17 and the sleeve 6 from tilting.
Moreover, after the frost heaving and thawing process is stopped and the temperature of the outside air rises, ice crystals in the moving layer 2 are melted, so that a certain gap is formed between soil bodies, at the moment, fine sand 19 can flow downwards to fill the soil gap in the moving layer 2 in the area between the pressure relief pipe and the sleeve 6, the compactness of the soil body in the moving layer 2 in the area between the pressure relief pipe and the sleeve 6 is improved, a large number of gaps exist in the soil body in the moving layer 2 near the pile 7, and the problem that the pile 7 is easy to topple is caused.
Example 2: in this embodiment, the sleeve 6 is no longer provided with the sliding sleeve 16 and the connecting rod 15. Other structures are the same as those of embodiment 1.
Example 3: in this embodiment, the lower end of the pressure relief pipe extends into the frozen soil layer 1. Other structures are the same as those of embodiment 2.
Example 4: in this embodiment, the pressure release pipe and the annular sandbox 8 are not filled with fine sand 19, and the top of the annular sandbox 8 is not provided with the level sensor 10. Other structures are the same as those of embodiment 1.
Example 5: in this embodiment, three flow holes 801 are formed in the bottom of the annular sandbox 8 at equal intervals along the circumferential direction of the annular sandbox. Correspondingly, the number of the pressure relief pipes and the number of the liquid level sensors 10 are 3. Other structures are the same as those of embodiment 1.
Example 5: in this embodiment, 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 side wall, and correspondingly, two 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 side wall. Other structures are the same as those of 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 characteristics 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 pre-buried device which is used for being installed underground;
the underground pre-buried 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 a movable layer (2), a sleeve (6) capable of moving up and down is inserted in the stabilizing cylinder (5) in a sliding manner, the upper end of the sleeve (6) extends to the ground, the stabilizing cylinder (5) and the sleeve (6) are both used for being sleeved on a pile (7), the lower end of the pile (7) is propped against the base (3), a movable plate (17) horizontally arranged is fixedly arranged on the sleeve (6), and the movable plate (17) is positioned in the movable layer (2);
the sleeve (6) is sleeved with a pressure relief device capable of sliding up and down, the pressure relief device comprises a plurality of pressure relief pipes which are embedded underground along the circumferential direction of the movable plate (17), the pressure relief pipes are of an upper-lower transparent hollow pipe structure, the upper ends of the pressure relief pipes are flush with the ground, a plurality of pressure relief through grooves which are arranged along the circumferential direction at intervals are formed in the side walls of the pressure relief pipes, the pressure relief through grooves are transparent along the upper-lower direction and inside and outside, and the pressure relief through grooves are located in the movable layer (2).
2. The pile foundation anti-freeze and anti-pull device of claim 1, wherein: the auxiliary force release device is arranged on the ground and comprises an annular sand box (8) with an upper opening, the annular sand box (8) is of an annular closed box body structure, an up-down through central pipe hole (18) is formed in the middle of the annular sand box (8), the central pipe hole (18) is used for allowing a sleeve (6) and a pile (7) to pass through, the bottom of the annular sand box (8) is connected with a pressure release pipe, and a flow hole (801) corresponding to the pipe hole of the pressure release pipe up and down is formed in the bottom of the annular sand box (8);
fine sand (19) is filled in 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. A pile foundation anti-freeze and anti-pull device as defined in claim 2, wherein: the annular sandbox (8) comprises an annular box body with an upper opening and an annular cover (9) arranged at the top of the annular box body in a covering mode, the annular cover (9) is detachably connected with the annular box body, an annular cavity is formed in the annular box body, and the flow holes (801) and the fine sand (19) are all located in the annular cavity.
4. A pile foundation anti-freeze and anti-pull device as defined in claim 3, wherein: the annular cover (9) is provided with a plurality of material level sensors (10), the material level sensors (10) are vertically corresponding to the flow holes (801), and the material level sensors (10) are used for monitoring the rising height of fine sand (19) at the flow holes (801).
5. A pile foundation anti-freeze apparatus as defined in 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. A pile foundation anti-freeze apparatus as defined in any one of claims 2 to 4, wherein: the pressure relief pipe comprises an embedded pipe (14) and an insertion pipe (13), wherein the embedded pipe (14) is embedded in the movable layer (2), the insertion pipe (13) is movably inserted in the embedded pipe (14), and the outer diameter of the insertion pipe (13) is equal to the inner diameter of the embedded 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) at equal intervals along the circumferential direction of the side wall, and the second pressure relief through grooves (1401) correspond to the inside and the outside of the first pressure relief through grooves (1301) so that the second pressure relief through grooves (1401) can be communicated with the first pressure relief through grooves (1301).
7. The pile foundation anti-freeze and anti-pull device of claim 6, wherein: the pressure relief device comprises a sliding sleeve (16) which is sleeved on the sleeve (6) in a vertically sliding manner, a plurality of connecting rods (15) are vertically and fixedly arranged on the side wall of the sliding sleeve (16) at equal intervals along the circumferential direction of the sliding sleeve, 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 and anti-pull device of claim 7, wherein: two movable plates (17) are fixedly arranged on the sleeve (6) along the vertical direction at intervals, 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. A pile foundation anti-freeze/pullout apparatus as claimed in claim 7 or 8, wherein: a chute which extends along the up-down direction and is provided with an upper opening is arranged on the inner wall of the embedded pipe (14), and the chute is positioned between the second pressure relief through grooves (1401);
a slide bar (1302) extending along the up-down direction is fixedly arranged on the outer wall of the insertion tube (13), and the slide bar (1302) is arranged in the chute in a up-down sliding way.
10. A pile foundation anti-freeze apparatus as defined in 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).
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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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| CN202210767539.4A CN115059122B (en) | 2022-07-01 | 2022-07-01 | Pile foundation anti-freezing and anti-pulling device |
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| CN115059122A CN115059122A (en) | 2022-09-16 |
| CN115059122B true 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115492169B (en) * | 2022-10-20 | 2023-03-17 | 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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| WO2016095052A1 (en) * | 2014-12-19 | 2016-06-23 | Hatch Ltd. | Composite sleeve for piles |
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| CN111648413A (en) * | 2020-06-10 | 2020-09-11 | 内蒙古大学 | Pile foundation anti-freezing and pulling device |
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| US20110088336A1 (en) * | 2009-10-19 | 2011-04-21 | Larsen Jr John E | Integrated post and jack system |
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| US4110989A (en) * | 1977-05-16 | 1978-09-05 | Thomas Selkirk | Piling fabricated from synthetic material |
| 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 |
| WO2016095052A1 (en) * | 2014-12-19 | 2016-06-23 | Hatch Ltd. | Composite sleeve for piles |
| CN109680705A (en) * | 2018-12-21 | 2019-04-26 | 兰州交通大学 | A kind of mast foundation for overhead contact wire system anti-freeze expansion system and its preparation process |
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| CN111648413A (en) * | 2020-06-10 | 2020-09-11 | 内蒙古大学 | Pile foundation anti-freezing and pulling device |
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| CN115059122A (en) | 2022-09-16 |
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