CN113653055B

CN113653055B - Device for reducing soil squeezing effect of tubular pile sinking

Info

Publication number: CN113653055B
Application number: CN202110938765.XA
Authority: CN
Inventors: 李亮辉; 曹笑颦; 彭福林; 王嵩; 方亮
Original assignee: Shenzhen Geotechnical Investigation & Surveying Institute Group Co ltd
Current assignee: Shenzhen Geotechnical Investigation & Surveying Institute Group Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-12-30
Anticipated expiration: 2041-08-16
Also published as: CN113653055A

Abstract

The invention relates to the technical field of construction equipment of a building tubular pile, and discloses a device for reducing a pile sinking and soil squeezing effect of a tubular pile. Through the outer sleeve, the setting of inner skleeve and annular piston head, make and utilize the less assembly of volume and thickness to insert in the soft soil layer, reduce the weak soil to displacement volume all around on the one hand, on the other hand, retrain the heavy stake of tubular pile, and when carrying out the heavy stake to the tubular pile, rise through pull rod pulling annular piston head, form the negative pressure in outer sleeve and inner skleeve, mutually support with the heavy stake of tubular pile, outwards displace from between outer sleeve and the inner skleeve with some weak soil in the inner skleeve, and simultaneously, because outer sleeve and inner skleeve are to the protection of tubular pile side, effectively block the earth of tubular pile displacement to the side extrusion, the crowded soil effect that reduces the tubular pile brings the influence to near heavy stake.

Description

Device for reducing soil squeezing effect of tubular pile sinking

Technical Field

The invention relates to the technical field of tubular pile construction equipment, in particular to a device for reducing the soil squeezing effect of tubular pile sinking.

Background

The tubular pile (prestressed high-strength concrete tubular pile) belongs to the crowded soil pile sinking mode, generally adopts the pile sinking technology of power pile driving, has characteristics such as resistant hitting, withstand voltage, penetrability are strong, the vertical bearing capacity of single pile is high, anti-seismic performance is good, the durability is good, the cost is suitable, construction period is short, the construction site civilized and tidy, nevertheless the pile sinking has some not enoughly in the installation use, as follows:

when the pile sinking is pressed into the ground, the soil body near the ground is upwards raised, and the soil body at a deeper layer below the ground can not be upwards raised due to the action of covering soil layer pressure, and is extruded towards the horizontal direction, so that the driven pipe pile and the adjacent pipeline can generate larger lateral displacement and upward floating due to the superposition action in pile group construction, the displacement of the soil is larger as the pile group is denser, and particularly, when a large dense pile group is driven into a saturated viscous soil foundation, the soil body around the pile can generate larger stress and displacement and simultaneously generate higher super-pore water pressure, and the super-pore water pressure caused by the small permeability coefficient of the viscous soil body is slow to dissipate, so that the construction project or the surrounding environment is seriously adversely affected, and the vertical displacement and the horizontal displacement of the soil body generated by the pile sinking can also have very serious influence on the adjacent buildings or pipelines.

Disclosure of Invention

The invention provides a device for reducing the pile sinking and soil squeezing effect of a tubular pile, which has the advantage of greatly reducing the influence of the pile squeezing effect on surrounding facilities and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a reduce device of crowded soil effect of tubular pile sinking, includes outer sleeve and tubular pile, the inner skleeve has been cup jointed in the inside activity of outer sleeve, inner skleeve and outer sleeve coaxial arrangement, the inclined hole has evenly been seted up on the outer sleeve, the pipe chute has been cup jointed in the activity in the inclined hole on the outer sleeve, set up even hole of permeating water on the pipe chute, the annular piston head has been cup jointed in the bottom activity of inner skleeve, the annular piston head cup joints with the inside activity of outer sleeve, the even fixed mounting in upper surface of annular piston head has the pull rod, the closing cap has been cup jointed in the top activity of outer sleeve, the top and the closing cap activity of pull rod cup joint, just be located the top of closing cap and seted up the screw thread on the pull rod, threaded connection has the nut on the pull rod, the bottom surface of nut and the upper surface swing joint of closing cap, the inside and the tubular pile activity of inner skleeve cup joint.

Preferably, the upper surface of the annular piston head and the horizontal plane form an included angle of 30-45 degrees, the inclined tube is perpendicular to the upper surface of the annular piston head, the bottom end of the inclined tube is L-shaped, one side of the L-shaped bottom end of the inclined tube is parallel to the upper surface of the annular piston head, and the other side of the L-shaped bottom end of the inclined tube is parallel to the vertical plane of the inner sleeve.

Preferably, the pull rod is evenly and fixedly provided with a supporting ball, and the inner wall of the inner sleeve is evenly and fixedly provided with an arc-shaped block.

Preferably, the outer sleeve has a length greater than that of the inner sleeve, and the outer sleeve is parallel to the upper surface of the inner sleeve.

The invention has the following beneficial effects:

1. through the outer sleeve, the setting of inner skleeve and annular piston head, make and utilize the less assembly of volume and thickness to insert in the soft soil layer, reduce the weak soil to displacement volume all around on the one hand, on the other hand, retrain the heavy stake of tubular pile, and when carrying out the heavy stake to the tubular pile, rise through pull rod pulling annular piston head, form the negative pressure in outer sleeve and inner skleeve, mutually support with the heavy stake of tubular pile, outwards displace from between outer sleeve and the inner skleeve with some weak soil in the inner skleeve, and simultaneously, because outer sleeve and inner skleeve are to the protection of tubular pile side, effectively block the earth of tubular pile displacement to the side extrusion, the crowded soil effect that reduces the tubular pile brings the influence to near heavy stake.

2. After the outer sleeve and the inner sleeve are inserted into the soft soil layer, the inclined pipe is pushed into the soil layer under the pushing of the annular piston head, after the inclined pipe is inserted into the soil layer, negative pressure is formed below the annular piston head due to the piston effect of the annular piston head formed in the outer sleeve and the inner sleeve, the inclined pipe adsorbs water in the super-pore space of the soil layer, and the water in the super-pore space of the soil layer is delivered into the outer sleeve and the inner sleeve under the extrusion of soil, so that the displacement force on the soft soil layer when a combined body of the outer sleeve and the inner sleeve is inserted into the soil layer is reduced, and the soil extrusion effect is reduced.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic diagram illustrating the structure and operation of the present invention;

FIG. 3 is a schematic top view of the structure of the present invention;

FIG. 4 is an enlarged view of the point A in FIG. 1.

In the figure: 1. an outer sleeve; 2. an inner sleeve; 3. a tubular pile; 4. an inclined tube; 5. an annular piston head; 6. a pull rod; 7. sealing the cover; 8. a nut; 9. a support ball; 10. an arc-shaped block.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a device for reducing the soil squeezing effect of tubular pile sinking comprises an outer sleeve 1 and a tubular pile 3, wherein an inner sleeve 2 is movably sleeved inside the outer sleeve 1, the inner sleeve 2 and the outer sleeve 1 are coaxially mounted, inclined holes are uniformly formed in the outer sleeve 1, inclined pipes 4 are movably sleeved in the inclined holes in the outer sleeve 1, uniform water permeable holes are formed in the inclined pipes 4, an annular piston head 5 is movably sleeved at the bottom of the inner sleeve 2, the annular piston head 5 is movably sleeved inside the outer sleeve 1, pull rods 6 are uniformly and fixedly mounted on the upper surface of the annular piston head 5, a sealing cover 7 is movably sleeved at the top of the outer sleeve 1, the top end of each pull rod 6 is movably sleeved with the sealing cover 7, threads are formed on each pull rod 6 and above the sealing cover 7, a nut 8 is connected to each pull rod 6 in a threaded manner, and the bottom surface of the nut 8 is movably connected with the upper surface of the sealing cover 7, the inner sleeve 2 is movably sleeved with the tubular pile 3, when the tubular pile sinking is carried out in a saturated soft soil area, firstly, a pile machine is utilized to press the combination of the outer sleeve 1, the inner sleeve 2 and the annular piston head 5 into a soft soil layer, then, a nut 8 and a sealing cover 7 are opened, the pile machine is utilized to stretch the pull rod 6, the pull rod 6 pulls the annular piston head 5 to move upwards, further, the inclined tube 4 is pushed into the soil layer, after the inclined tube 4 is inserted into the soil layer, negative pressure is formed below the annular piston head 5 due to the piston effect of the annular piston head 5 formed in the outer sleeve 1 and the inner sleeve 2, the inclined tube 4 adsorbs ultra-pore water in the soil layer, the ultra-pore water in the soil layer is extruded to be fed into the outer sleeve 1 and the inner sleeve 2, the extrusion force on the soft soil layer when the combination of the outer sleeve 1 and the inner sleeve 2 is inserted into the soil layer is reduced, the soil extrusion effect is reduced, meanwhile, because the width of the combination formed by the outer sleeve 1 and the inner sleeve 2 is smaller, the outer sleeve 1 and the inner sleeve 2 are inserted into soft soil, the displacement of the soft soil is less, the soil squeezing effect on the soft soil is smaller than the soil squeezing effect of directly inserting the tubular pile 3, and when the pull rod 6 is stretched, the tubular pile 3 is placed into the inner sleeve 2 to be piled, soil entering the middle of the inner sleeve 2 is squeezed, the soil between the inner sleeve 2 is squeezed by the tubular pile 3, meanwhile, the annular piston head 5 forms negative pressure between the outer sleeve 1 and the inner sleeve 2 to pull the soil in the middle of the inner sleeve 2 to the position between the outer sleeve 1 and the inner sleeve 2, the amount of the soil between the inner sleeve 2 overflowing to two sides is reduced, the soil squeezing effect on two sides of the tubular pile 3 is reduced, the tubular pile 3 vertically squeezes the soil downwards under the constraint of the inner sleeve 2, and the soil squeezing effect between the effective heights of the installed tubular pile is greatly reduced;

referring to fig. 4, an included angle of 30-45 degrees is formed between the upper surface of the annular piston head 5 and the horizontal plane, the inclined tube 4 is perpendicular to the upper surface of the annular piston head 5, the bottom end of the inclined tube 4 is L-shaped, one side of the L-shaped bottom end of the inclined tube 4 is parallel to the upper surface of the annular piston head 5, and the other side of the L-shaped bottom end of the inclined tube 4 is parallel to the vertical plane of the inner sleeve 2, so that the inclined tube 4 can be suspended between the outer sleeve 1 and the inner sleeve 2, when the annular piston head 5 rises, the inclined tube 4 can be better pushed into a soft soil layer, and when drainage is finished, the outer sleeve 1 is pulled upwards, and is retracted into the outer sleeve 1 under the push of soil, thereby facilitating the detachment of the outer sleeve 1 and the inner sleeve 2; the pull rod 6 is uniformly and fixedly provided with supporting balls 9, when the combined body of the outer sleeve 1 and the inner sleeve 2 is inserted, the outer sleeve 1 and the inner sleeve 2 are supported, the outer sleeve 1 and the inner sleeve 2 are prevented from being extruded by soil, deviation is generated between the outer sleeve 1 and the inner sleeve 2, central axis deviation is caused, and subsequent insertion of the tubular pile 3 is influenced, the arc-shaped blocks 10 are uniformly and fixedly arranged on the inner wall of the inner sleeve 2, when the tubular pile 3 is inserted, the contact area between the tubular pile 3 and the inner sleeve 2 is reduced, meanwhile, when the inner sleeve 2 is inserted, a certain gap can exist between the inner sleeve 2 and a soil layer, so that 'soil plug' is prevented from being generated when the inner sleeve 2 is inserted, the resistance of the inner sleeve 2 during insertion is reduced, and the installation efficiency is increased; the length of outer sleeve 1 is greater than the length of inner skleeve 2, and outer sleeve 1 is parallel with the upper surface of inner skleeve 2 for the bottom surface of inner skleeve 2 is higher than the bottom surface of outer sleeve 1, and when inserting tubular pile 3, the earth of inner skleeve 2 bottom is blockked to outer sleeve 1, reduces earth side direction displacement in the inner skleeve 2, reduces the crowded soil effect of side direction of earth.

The working principle is that when the pile sinking of the tubular pile is carried out in a saturated soft soil area, firstly, a combined body of an outer sleeve 1, an inner sleeve 2 and an annular piston head 5 is pressed into a soft soil layer by a pile machine, then, a nut 8 and a sealing cover 7 are opened, a pull rod 6 is stretched by the pile machine, the annular piston head 5 is pulled by the pull rod 6 to move upwards, and then the inclined tube 4 is pushed into the soil layer, after the inclined tube 4 is inserted into the soil layer, negative pressure is formed below the annular piston head 5 due to the piston effect of the annular piston head 5 formed in the outer sleeve 1 and the inner sleeve 2, super pore water in the soil layer is absorbed by the inclined tube 4, and the super pore water in the soil layer is extruded by soil and sent into the outer sleeve 1 and the inner sleeve 2, so that the extrusion force on the soft soil layer when the combined body of the outer sleeve 1 and the inner sleeve 2 is inserted into the soil layer is reduced, the soil extrusion effect is reduced, and when the pull rod 6 is stretched, the tubular pile 3 is put into the inner sleeve 2, the inner sleeve is extruded by the inner sleeve, the pile sinking process is completed, and the pile sinking process is completed when the tubular pile is extruded by the outer sleeve 3, the outer sleeve 1 and the inner sleeve 2, the annular piston head 5 is extruded by the outer sleeve and the inner sleeve 2, the outer sleeve and the inner sleeve 2, the inner sleeve, the outer sleeve, the soil is pulled by the inner sleeve 2, and the inner sleeve 2, the soil;

in the disassembling process, firstly, the outer sleeve 1 and the inner sleeve 2 are synchronously pulled away, after the pulling away is finished, soil in the inclined tube 4 is washed, the inclined tube 4 is ensured to be smooth, then, the pull rod 6 is inserted from the bottom of the outer sleeve 1, the sealing cover 7 is covered on the outer sleeve 1 and the inner sleeve 2, and finally, the nut 8 is used for locking, and the next pile sinking is waited.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a reduce crowded native effect's of tubular pile sinking device, includes outer sleeve (1) and tubular pile (3), its characterized in that: inner skleeve (2) has been cup jointed in the inside activity of outer sleeve (1), inner skleeve (2) and outer sleeve (1) coaxial arrangement, the inclined hole has evenly been seted up on outer sleeve (1), pipe chute (4) have been cup jointed in the activity in the inclined hole on outer sleeve (1), set up even hole of permeating water on pipe chute (4), annular piston head (5) have been cup jointed in the bottom activity of inner skleeve (2), annular piston head (5) cup joints with the inside activity of outer sleeve (1), the even fixed mounting of upper surface of annular piston head (5) has pull rod (6), closing cap (7) have been cup jointed in the top activity of outer sleeve (1), the top and the activity of closing cap (7) of pull rod (6) cup joint, just be located the top of closing cap (7) and set up the screw thread on pull rod (6), threaded connection has nut (8) on pull rod (6), the bottom surface of nut (8) is connected with the upper surface of closing cap (7) activity, the inside of inner skleeve (2) is the activity with tubular pile (3) and cup joints the activity, the surface of annular piston head (5) is the upper surface of annular piston head (5) and is the inclined tube chute (4-shaped inclined tube (4) upper surface of the L face of the L type L face of the L of the upper surface of the L of the inclined tube (4), the upper surface of the inclined tube (4) is the L face of the L type, the L face of the L type bottom, the inclined tube (4) is parallel type, the L face of the inclined tube (4) is the L of the L type bottom, the inclined tube (4) is the inclined tube (4, the other side of the pull rod is parallel to the vertical surface of the inner sleeve (2), supporting balls (9) are uniformly and fixedly mounted on the pull rod (6), arc-shaped blocks (10) are uniformly and fixedly mounted on the inner wall of the inner sleeve (2), the length of the outer sleeve (1) is greater than that of the inner sleeve (2), and the outer sleeve (1) is parallel to the upper surface of the inner sleeve (2);

firstly, a pile driver is used for pressing the combination of the outer sleeve (1), the inner sleeve (2) and the annular piston head (5) into a soft soil layer, then a nut (8) and a sealing cover (7) are opened, the pull rod (6) is stretched by the pile driver, the annular piston head (5) is pulled by the pull rod (6) to move upwards, the inclined tube (4) is pushed into the soil layer, after the inclined tube (4) is inserted into the soil layer, due to the piston effect formed by the annular piston head (5) in the outer sleeve (1) and the inner sleeve (2), negative pressure is formed below the annular piston head (5), super-pore water in the soil layer is absorbed through the inclined tube (4), and the super-pore water in the soil layer is squeezed by soil, water is fed into the outer sleeve (1) and the inner sleeve (2), the squeezing force on the soft soil layer when the outer sleeve (1) and the inner sleeve (2) are inserted into the soil layer is reduced, the soil squeezing effect is reduced, meanwhile, as the combination of the outer sleeve (1) and the inner sleeve (2) is inserted into the soil layer, the inner sleeve (2) is stretched, the pile driving effect is reduced, and the pile effect is achieved when the pull rod (3) is directly squeezed, the pile driving effect is achieved, the pile effect on the soil squeezing of the soil is achieved, soil between inner skleeve (2) is when receiving the extrusion of tubular pile (3), because annular piston head (5) forms the negative pressure between outer sleeve (1) and inner skleeve (2), soil with the inner skleeve (2) middle part is pulled to between outer sleeve (1) and inner skleeve (2), reduce the volume that soil between inner skleeve (2) spills over to both sides, reduce the crowded native effect of tubular pile (3) both sides, and under the constraint of inner skleeve (2), tubular pile (3) are crowded with soil vertically downwards, crowded native effect between the effective height of installation tubular pile reduces by a wide margin.