CN114108620B - Anti-floating anchor rod in soft soil - Google Patents

Anti-floating anchor rod in soft soil Download PDF

Info

Publication number
CN114108620B
CN114108620B CN202111292014.1A CN202111292014A CN114108620B CN 114108620 B CN114108620 B CN 114108620B CN 202111292014 A CN202111292014 A CN 202111292014A CN 114108620 B CN114108620 B CN 114108620B
Authority
CN
China
Prior art keywords
sleeve
rod
circular tube
rope
soft soil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111292014.1A
Other languages
Chinese (zh)
Other versions
CN114108620A (en
Inventor
金炜枫
解军吉
付周敏
陶颖
曹宇春
薛向东
黄扬飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Lover Health Science and Technology Development Co Ltd
Original Assignee
Zhejiang Lover Health Science and Technology Development Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Lover Health Science and Technology Development Co Ltd filed Critical Zhejiang Lover Health Science and Technology Development Co Ltd
Priority to CN202111292014.1A priority Critical patent/CN114108620B/en
Publication of CN114108620A publication Critical patent/CN114108620A/en
Application granted granted Critical
Publication of CN114108620B publication Critical patent/CN114108620B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • 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
    • E02D31/12—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 upward hydraulic pressure
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23—Dune restoration or creation; Cliff stabilisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Paleontology (AREA)
  • General Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Data Mining & Analysis (AREA)
  • Computational Mathematics (AREA)
  • Algebra (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Hydrology & Water Resources (AREA)
  • Pure & Applied Mathematics (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • Environmental & Geological Engineering (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The invention discloses an anti-floating anchor rod in soft soil, which comprises a circular tube, a driving device, a rod and a conveying cavity, wherein the circular tube is arranged on the driving device; the conveying cavity is a plurality of and runs through the pipe setting, and conveying cavity's export sets up at the pipe lateral wall, the pole one-to-one sets up in conveying cavity, and drive arrangement sets up in the pipe, and drive arrangement cooperates with the pole in order to drive the one end of pole and moves into outside the pipe from conveying cavity's export. The invention has the beneficial effect of enhancing the anti-buoyancy of the anti-floating anchor rod of the underground structure in soft soil.

Description

Anti-floating anchor rod in soft soil
Technical Field
The invention belongs to the field of geotechnical engineering research, and particularly relates to an anti-floating anchor rod in soft soil.
Background
The anti-floating anchor rod is one kind of anti-floating measure for underground structure in building engineering. The anti-floating anchor rod refers to a structural member which is arranged against the upward displacement of a building on the anti-floating anchor rod, and is related to the height and the change condition of the underground water level and is opposite to the stress direction of the anti-floating pile.
When the basement bears the excessive pressure of underground water, anti-floating piles or anti-floating anchor rods are needed, or the basement ground is depressurized and drained, and the anti-floating anchor rods are used in soft soil, so that the problem that the bonding between an anchor rod grouting body and a soft soil interface is weak exists, and the anti-floating performance of the anchor rods in the soft soil needs to be enhanced.
Disclosure of Invention
One of the objectives of the present invention is to provide an anti-floating anchor in soft soil to solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an anti-floating anchor rod in soft soil comprises a circular tube, a driving device, a rod and a conveying cavity; the conveying cavity is a plurality of and runs through the pipe setting, and conveying cavity's export sets up at the pipe lateral wall, the pole one-to-one sets up in conveying cavity, and drive arrangement sets up in the pipe, and drive arrangement cooperates with the pole in order to drive the one end of pole and moves into outside the pipe from conveying cavity's export.
Preferably, the driving device is a hydraulic cylinder, and the movable end of the hydraulic cylinder is matched with the tops of all the rods so as to drive one ends of all the rods to synchronously move out of the circular tube through the outlet of the conveying cavity.
Preferably, the anchor rod further comprises a first auxiliary reinforcing device which is arranged in one-to-one correspondence with the rod, the first auxiliary reinforcing device comprises a pull rope and a tightening device, the tightening device is arranged on the outer side of the circular tube and comprises a motor and a roller fixedly connected with a rotating shaft of the motor, the pull rope is wound on the roller, one end of the pull rope is fixedly connected with the roller, and the other end of the pull rope is fixedly connected with one end of the rod, which is close to the outlet of the conveying cavity, through the outer side of the circular tube.
Preferably, the anchor rod further comprises a second auxiliary reinforcing device which is arranged in one-to-one correspondence with the rod, the second auxiliary reinforcing device comprises a locking piece, a first sleeve and a second sleeve, the second sleeve is sleeved outside the first sleeve and is in sliding connection, the locking piece is matched with the first sleeve, the second sleeve or the circular tube, the first sleeve and the second sleeve are fixedly connected through the locking piece, the first sleeve is hinged with the circular tube, a hinge point is positioned between an outlet of the conveying cavity and the bottom end of the circular tube, and the second sleeve is hinged with the rod.
Preferably, the locking piece is an electric heater, the electric heater is fixedly arranged on the first sleeve, the second sleeve or the circular tube, the first sleeve is made of shape memory alloy, the electric heater heats the first sleeve to a first temperature, and the first sleeve is positioned at a first radius at the first temperature and slides freely in the second sleeve; the electric heater is characterized in that the first sleeve is at a second temperature when not heated, the first sleeve is at a second radius when at the second temperature, and the first sleeve cannot slide freely in the second sleeve; the second radius is greater than the first radius.
Preferably, the locking piece is an expansion strip coated with a slow release agent, the expansion strip is fixedly arranged on the inner wall of the second sleeve, and a gap between the first sleeve and the expansion strip is arranged so that the first sleeve and the second sleeve can slide relatively; the expansion strip prevents the first sleeve from moving in the second sleeve after being expanded by water.
Preferably, the anchor rod further comprises a circumferential reinforcing device, wherein the circumferential reinforcing device comprises a circumferential rope, a locking hook, a rope storage chamber and a mounting assembly; the annular rope is arranged on the outer side wall of the circular pipe, the lock hook is fixedly arranged on the annular rope, the rod is provided with a mounting groove for mounting the lock hook, the rope storage chamber is fixedly arranged on the outer side wall of the circular pipe, the lock hook and the mounting component are arranged inside the rope storage chamber, and the mounting component is used for mounting the hook lock into the mounting groove.
Preferably, the installation component contains first spring, push pedal, push rod and pusher, and first spring coupling stores rope room inner wall and push pedal, and the push pedal extrudes the latch hook, and push rod and pusher are connected, push rod and latch hook contact, and pusher drive push rod are with the latch hook push in the mounting groove, then pusher is withdrawed the push rod, and first spring extrusion push pedal presses still another latch hook below the push rod this moment.
Preferably, two adjacent circumferential ropes are connected by flexible cloth or silk screen.
Preferably, the circumferential rope is of a composite structure and comprises water-swelling particles and a water-permeable capsule wrapping the water-swelling particles.
Preferably, the anti-floating method comprises the steps of: the round pipe of the anchor rod is driven into soft soil, then the driving device drives the rod to enter the soil from the outlet of the conveying cavity, the rod is bent, and the part of the rod entering the soil is not parallel to the round pipe.
Preferably, a plurality of inclinometers are installed inside the rod, and the installation positions of the inclinometers are as follows: the soil entering end part of the rod far away from the circular tube is provided with an inclinometer, the position where the rod contacts with the circular tube is provided with an inclinometer, a plurality of inclinometers are arranged between the two inclinometers, and the vertical acting force calculation method of the rod to the circular tube of the anchor rod is as follows:
(1) Step 1, setting the soil-entering length of a rod as L, setting m+1 inclinometers in total, and dividing the soft soil-entering part of the rod with the total length of L into m sections; setting the number of the inclinometer at the junction of the rod and the circular tube as 1, and the number of the inclinometer furthest away from the circular tube as m+1, wherein the number of the node between the inclinometer 1 and the inclinometer m+1 is sequentially increased;
(2) Step 2, setting the ith inclinometer and the (i+1) th inclinometer to correspond to each otherThe node of (2) is the ith node and the (i+1) th node respectively, the ith section is arranged between the ith node and the (i+1) th node, and the length of the ith section is L (i) Young's modulus of E (i) Moment of inertia I (i) The number corresponding to the node of the ith section close to the circular tube is i1, and the number corresponding to the node of the ith section far away from the circular tube is i 2 The vertical displacement and the rotation angle corresponding to the node of the ith section close to the circular tube are respectively
Figure BDA0003334120430000046
And->
Figure BDA0003334120430000047
The vertical displacement and the rotation angle corresponding to the node of the ith section far away from the circular tube are respectively +.>
Figure BDA0003334120430000048
And->
Figure BDA0003334120430000049
Here, (1.ltoreq.i.ltoreq.m);
(3) Step 3, measuring the corresponding rotation angle theta of each node based on the inclinometer j The method comprises the steps of carrying out a first treatment on the surface of the Taking the vertical displacement v of the node when j=1 j When j is greater than 1, the vertical displacement on the node j is taken as
Figure BDA0003334120430000041
Thus obtaining the displacement and the rotation angle of each node;
(4) Step 4, from the length L of the ith section (i) Young's modulus E (i) Moment of inertia I (i) Vertical displacement at two nodes
Figure BDA00033341204300000410
And->
Figure BDA00033341204300000411
Corner on two nodes->
Figure BDA00033341204300000412
And->
Figure BDA00033341204300000413
Thereby calculating the node force ++on the two nodes on the i-th segment>
Figure BDA00033341204300000414
And->
Figure BDA00033341204300000415
Calculating bending moment +.>
Figure BDA00033341204300000416
And->
Figure BDA00033341204300000417
The calculation method comprises the following steps:
Figure BDA0003334120430000042
Figure BDA0003334120430000043
(5) Step 5, calculating the vertical force of the rod on the circular tube of the anchor rod
Figure BDA0003334120430000044
Calculating bending moment of rod to circular tube
Figure BDA0003334120430000045
Based on the vertical force F of the rod to the circular tube, the vertical force shared by the rod and the circular tube can be obtained through calculation and analysis, the soil friction force born by the circular tube can be determined by a conventional method, for example, the axial strain is measured on the circular tube in a segmented mode, and therefore the friction resistance of lateral soil is calculated; in addition, the vertical force F and the bending moment M at the junction of the rod and the circular tube can check whether the stress of the rod exceeds the strength of the rod.
Compared with the prior art, the invention has the beneficial effects that:
the invention can enhance the anti-floating performance of the anti-floating anchor rod of the underground structure in soft soil, namely the anti-floating force of the anchor rod is increased after the rod is bent into the soil, in addition, the pull rope of the first auxiliary reinforcing device and the sleeve of the second auxiliary reinforcing device increase the capacity of the rod for resisting the soil pressure and prevent the rod from bending and breaking near the round pipe, and the circumferential reinforcing device can increase the stress area of the anchor rod and the soil and increase the anti-floating performance of the anchor rod.
Drawings
FIG. 1 is a schematic view of a driven anchor of the present invention;
FIG. 2 is a schematic view of a first auxiliary enhancement device according to the present invention;
FIG. 3 is a schematic view of a second auxiliary enhancement device according to the present invention;
FIG. 4 is a schematic diagram of the locking member of the present invention as an electric heater;
FIG. 5 is a schematic view of an expansion strip coated with a slow release agent for a locking element according to the present invention;
FIG. 6 is a schematic view of a circumferential reinforcement device according to the present invention;
FIG. 7 is a schematic view of the circumferential reinforcement device of the present invention comprising a flexible cloth;
FIG. 8 is a schematic view of a mounting assembly of the present invention;
FIG. 9 is a schematic view of a circumferential rope of the present invention in a composite structure;
FIG. 10 is a schematic view of the ring and shackle of the present invention with a second spring;
FIG. 11 is a schematic view of the attachment of the ring and shackle of the present invention with a first water-swellable block;
FIG. 12 is a schematic view of the attachment of the ring and the latch hook when the latch hook is made of a shape memory alloy according to the present invention;
FIG. 13 is a schematic view of the attachment of the ring and shackle of the present invention with a second water-swellable block;
in the drawings, 1. Soft soil, 2. Anchor rod, 3. Round tube, 4. Drive device, 5. Rod, 6. Delivery chamber, 7. Oil pump, 8. Pressure chamber, 9. Drive disk, 10. Draw string, 11. Tightening device, 12. First sleeve, 13. Second sleeve, 14. Electric heater, 15. Expansion strip, 16. Circumferential rope, 17. Latch hook, 18. Circular ring, 19. Flexible cloth, 20. Storage rope chamber, 21. First spring, 22. Push plate, 23. Push rod, 24. Push machine, 25. Soft bag, 26. Water-swelling particle, 27. First chamber, 28. Second spring, 29. Fixed block, 30. Groove, 31. First Water-swelling block, 32. Fixed block, 33. Round hole, 34. Fixed rod, 35. Second Water-swelling block
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, innovative features, achieved objects and effects achieved by the present invention more readily apparent.
An anti-floating anchor rod 2 in soft soil as shown in fig. 1-13 comprises a circular tube 3, a driving device 4, a rod 5 and a conveying cavity 6. The lower part of the round tube 3 is a solid body and is provided with an opening at the top, and a hollow cavity communicated with the opening at the top is arranged. The conveying cavity 6 is arranged on a solid body at the lower part of the circular tube 3, the conveying cavity 6 consists of a blind hole vertically arranged on the solid body and a blind hole horizontally arranged on the side wall of the circular tube 3, and the two blind holes are communicated to form an L-shaped conveying cavity 6; the conveying chamber 6 is a through hole, an opening of the conveying chamber 6 close to the outer side wall of the circular tube 3 is an outlet, and an opening of the other side of the conveying chamber 6 is an inlet. The transport chambers 6 are provided in plural numbers in the circumferential direction. The rods 5 are arranged in the conveying chambers 6, and the rods 5 are in one-to-one correspondence with the conveying chambers 6. The driving device 4 is installed in the circular tube 3, i.e. fixedly arranged in the hollow cavity, and the driving device 4 is matched with the rods 5 in the conveying chambers 6, so that the rods 5 in all the conveying chambers 6 synchronously move under the action of the driving device 4, and the rods at the outlet end of the conveying chambers 6 are moved out of the circular tube 3 through the conveying chambers. The anchor rod 2 is driven to a designated depth as shown in fig. 1 (a), and then the driving means 4 drives the rod 5 from the outlet of the conveying chamber 6 into the soft soil 1 as shown in fig. 1 (b).
Specifically, the driving device 4 comprises an oil pump 7, a pressure chamber 8 and a driving disc 9, one end of the driving disc 9 is arranged in the pressure chamber 8, the other end of the driving disc 9 extends out of the pressure chamber 8, one end of the driving disc 9 arranged in the pressure chamber 8 is a piston, the piston is matched with the pressure chamber 8 to divide the pressure chamber into an upper sealing cavity and a lower sealing cavity, and the upper sealing cavity is communicated with the oil pump; one end of a driving disc 9 arranged outside the pressure chamber 8 comprises a plurality of vertical rods fixedly connected with the pistons, the vertical rods are in one-to-one correspondence with the rods 5 and are in contact with the top ends, when the oil pump 7 is pressurized, the oil pressure in the upper sealing cavity is increased, the driving disc 9 in the pressure chamber is driven to move downwards, the end part of the rod 5 is pressed down by the driving disc 9, and accordingly the rods 5 enter the soft soil 1 from the outlet of the conveying chamber 6.
According to the invention, the rod 5 is partially moved into the soft soil 1 from the conveying cavity 5 through the driving device 4, and the two ends of the rod 5 are respectively arranged in the circular tube 3 and the soft soil 1, so that the anti-floating performance of the anchor rod is realized.
Further, the inner wall of the delivery chamber 6 is provided with lubricating oil, or is provided with balls, or is provided with a rolling disc, thereby reducing the friction of the rod 5 in the delivery chamber 6.
Further, as shown in fig. 2, the anti-floating anchor rod 2 further comprises first auxiliary reinforcing devices corresponding to the rods 5 one by one, the first auxiliary reinforcing devices comprise pull ropes 10 and tightening devices 11, the pull ropes 10 are connected with the rods 5 at the outlet end of the conveying chamber 6 as shown in fig. 2 (a), and the pull ropes 10 are connected with the tightening devices 11 and the rods 5 through the outer sides of the round tubes 3; in the process that the rod 5 enters the soft soil 1 layer through the outlet of the conveying chamber 6, the tightening device 11 enables the pull rope 10 to freely stretch; as shown in fig. 2 (b), when the lever 5 enters the soft soil 1 layer and reaches a predetermined length, the tightening device 11 fixes the pulling rope 10, and the pulling rope 10 cannot be freely extended. Specifically, the tightening device 11 comprises a motor and a drum, wherein a rotating shaft of the motor is fixedly connected with the drum to drive the drum to rotate, and the pull rope 10 is wound on the drum and one end of the pull rope is fixedly connected with the drum; in the process that the rod 5 enters the soft soil layer 1 through the outlet of the conveying chamber 6, the motor drives the roller to rotate, and the length of the pull rope 10 in the soft soil layer 1 is increased; when the rod 5 enters the soft soil 1 layer to reach a specified length, the roller is fixed, and the pull rope 10 cannot be freely stretched. Pulling force is provided by the pull rope 10 at the end of the rod 5 entering the layer of soft soil 1, and the capacity of the rod 5 for resisting soil pressure is increased in the anti-floating process, so that the rod 5 is prevented from bending near the round tube 3.
Further, as shown in fig. 3 (a), the anchor rod 2 further includes a second auxiliary reinforcing device corresponding to the rod 5 one by one, the second auxiliary reinforcing device is vertically arranged, and a containing groove for containing the second auxiliary reinforcing device is formed in the side portion of the lower end of the circular tube, the second auxiliary reinforcing device includes a locking piece, a first sleeve 12 and a second sleeve 13, the first sleeve is arranged on the upper portion of the second sleeve, the second sleeve 13 is sleeved outside the first sleeve 12, the first sleeve 12 arranged in the containing groove is hinged to the circular tube 3, a hinge point is located between the outlet of the conveying cavity 6 and the bottom end of the circular tube 3, and the second sleeve 13 is hinged to one end of the rod 5 close to the outlet of the conveying cavity 6. The hinge refers to a hinge point which can rotate freely but has no relative displacement. In the process that the rod 5 enters the soft soil 1 layer through the outlet of the conveying chamber 6, the locking piece does not work, and the first sleeve 12 freely slides in the chamber of the second sleeve 13; as shown in fig. 3 (b), when the rod 5 enters the soft soil 1 layer to reach a designated length, the locking member works, and the first sleeve 12 and the second sleeve 13 are fixedly connected to form a stressed rod member.
For example, as shown in fig. 4, the locking member is an electric heater 14, the electric heater 14 is embedded in the first sleeve 12, and the first sleeve is made of 12 shape memory alloy, and when the electric heater 14 is heated as shown in fig. 4 (a), the first sleeve is at a first temperature, and the first sleeve 12 made of shape memory alloy is at a first radius and can freely slide in the second sleeve 13 at the first temperature; as shown in fig. 4 (b), when the electric heater 14 is not heated, the first sleeve is at a second temperature, the first sleeve 12 made of the shape memory alloy is at a second radius at the second temperature, and the first sleeve 12 and the second sleeve 13 are fixedly connected; the second radius is greater than the first radius. In the process that the rod 5 enters the soft soil 1 layer through the outlet of the conveying chamber 6, the electric heater 14 heats the first sleeve 12 to be at a first temperature; when the rod 5 enters the soft soil 1 layer to reach a specified length, the electric heater 13 does not heat so that the first sleeve 12 is at the second temperature; the electric heater 14 is resistance wire heating, infrared heating or microwave heating. The electric heater 14 can be arranged on the first sleeve 12, the second sleeve 13 or the circular tube 3, and the installation position of the electric heater 14 can be set according to actual conditions.
As shown in fig. 5, the locking member may be an expansion strip 15 coated with a slow release agent, where the expansion strip 15 is fixedly disposed on the inner wall of the second sleeve 13, and the expansion strip 15 is in clearance fit with the first sleeve 12, so that the expansion strip in the initial state does not block the first sleeve 12 from sliding in the second sleeve 13; in the process that the rod 5 enters the soft soil 1 layer through the outlet of the conveying chamber 6 as shown in fig. 5 (b), the slow release agent blocks the expansion strip 15 from contacting with the groundwater, and the first sleeve 12 freely slides in the second sleeve 13; after the rod 5 enters the soft soil 1 layer to reach a designated length, the slow release agent is gradually dissolved in water, and the expansion strip 15 expands when meeting groundwater, so that the first sleeve 12 is prevented from freely sliding in the second sleeve 13.
Still further, as shown in fig. 6 and 8, the anchor rod 2 further includes a circumferential reinforcement means including a circumferential string 16, a locking hook 17, a string storage chamber 20, and a mounting assembly; the lever is provided with a mounting groove for mounting the latch hook 17. As shown in fig. 6, two circumferential ropes 16 are all surrounded outside a circular tube 3, 4 lock hooks 17 are fixedly arranged on each circumferential rope 16 at equal intervals, the positions of the lock hooks on the two circumferential ropes 16 are correspondingly arranged, 4 rope storage chambers 20 are arranged, the rope storage chambers 20 are fixedly arranged on the side wall of the circular tube 3, the positions of the 4 rope storage chambers correspond to the positions of the lock hooks 17, the rope storage chambers 20 are used for storing the lock hooks 17, a mounting assembly is arranged in the rope storage chambers 20 in cooperation with the lock hooks 17 and is used for mounting the lock hooks 17 in a mounting groove of a rod, the mounting groove 18 is shown in fig. 8 (a), the mounting assembly comprises a first spring 21, a push plate 22, a push rod 23 and a pushing machine 24, the first spring 21 is connected with the inner wall of the rope storage chamber 20 and the push plate 22, the push rod 23 is connected with the pushing machine 24, and the push rod 23 is contacted with the lock hooks 17; the pusher 24 drives the push rod 23 to press the latch hook 17 into the mounting groove 18, and then the pusher 24 withdraws the push rod 23, at which time the first spring 21 presses the push plate 22 and presses the latch hook 17 on the other circumferential rope under the push rod 23 through the push rod 23 as shown in fig. 8 (b). The pusher 24 may be a motor or a hydraulic mechanism that pushes the cylinder with the motor.
In the invention, when the rod 5 enters the soft soil 1 layer through the outlet of the conveying chamber 6, the installation component inserts the lock hook 17 of the circumferential rope 16 into the installation groove 18 when the installation groove 18 on the rod 5 passes under the rope storage chamber 20, and the lock hook 17 is fixedly connected with the installation groove 18. The invention introduces the circumferential rope 16, so that the rod 5 and the circumferential rope 16 form a grid, and the pulling resistance of the anchor rod 2 is increased. The length of the circumferential rope 16 between two adjacent lock hooks 17 is determined by the position of the circumferential rope 16 in the soft soil 1, the two adjacent lock hooks 17 on the circumferential rope 16 are connected with two corresponding mounting grooves 18, and the final position of the two mounting grooves 18 in the soil determines the length of the circumferential rope 16 between the two mounting grooves 18. Further, as shown in fig. 7, two circumferential ropes 16 which enter the soft soil 1 layer at first are connected by a flexible cloth 19 or connected by a silk screen, so that the anti-buoyancy of the anchor rod 2 is increased.
Further, as shown in fig. 9, the circumferential rope 16 is in a composite structure, the circumferential rope 16 comprises a water permeable soft bag 25 and water swelling particles 26, the water permeable soft bag 25 wraps the water swelling particles 26, and when the water swelling particles 26 do not absorb water and swell, as shown in fig. 9 (a); in soft soil 1, groundwater flows into water-swelling particles 26 through soft bags 25, and after the water-swelling particles 26 swell as shown in fig. 9 (b), the circumferential ropes 16 are expanded, and the tensile pulling force of anchor rod 2 is increased.
As a specific embodiment for realizing the connection between the mounting groove and the hook lock in the invention, as shown in fig. 10, a first chamber 27, a second spring 28 and a fixed block 29 are arranged in the mounting groove 18, the second spring 28 is positioned in the first chamber 27, the mounting groove 18, the second spring 28 and the fixed block 29 are sequentially connected, a part of the fixed block 29 is positioned in the first chamber 27, and the upper surface of the fixed block 29 is provided with a part of an inclined surface; the side of the latch hook 17 is provided with a groove 30 matched with the fixed block 29; during the insertion of the latch hook 17 into the mounting groove 18 as shown in fig. 10 (a), the latch hook 17 first contacts the inclined surface portion of the upper surface of the fixed block 29 and pushes the fixed block 29 to move horizontally to compress the second spring 28; as shown in fig. 10 (b), when the fixing block 29 is located in the groove 30 on the side of the latch hook 17, the second spring 28 presses the fixing block 29 into the groove 30, and the latch hook 17 and the mounting groove 18 are fixed.
As another specific embodiment for realizing the connection between the mounting groove and the hook lock in the invention, as shown in FIG. 11, a first chamber 27 is arranged on one side of the mounting groove 18, a first water-swelling block 31 and a fixing block 29 are arranged in the first chamber 27, the first water-swelling block 31 is fixedly connected with the fixing block 29 by an inclined plane, and the fixing block 29 is fixedly connected with the inclined plane, and the first water-swelling block 31 can gradually swell when being contacted with water so as to enable the fixing block 29 to partially move outside the first chamber 27; the side of the latch hook 17 is provided with a groove 30 matched with the fixed block 29; as shown in fig. 11 (a), during insertion of the latch hook 17 into the mounting groove 18, the first water-swellable block 31 swells gradually in water; as shown in fig. 11 (b), the first water-swellable block 31 swells with water and then pushes the fixing block 32 to be inserted into the groove 30, and the latch hook 17 is fixed to the mounting groove 18.
As a third specific embodiment for realizing the locking connection between the mounting groove and the hook in the invention, as shown in fig. 12, the latch hook 17 is made of a shape memory alloy material, as shown in fig. 12 (a), the latch hook 17 is in an inverted L shape at the third temperature, the bottom side has no protrusion, as shown in fig. 12 (b), the latch hook is deformed to form a U shape with the opening at the side at the fourth temperature, and the mounting groove 18 is clamped to be fixed with the mounting groove 18, the latch hook 17 is in the third temperature at the time of the inside of the rope storage 20, the latch hook 17 is in the fourth temperature in the soft soil 1, the temperature in the rope storage 20 is controlled to be the third temperature by installing an electric heater in the inside of the rope storage 20, and the electric heater can be electric resistance wire heating, infrared heating, or microwave heating.
As a fourth embodiment for realizing the connection between the mounting groove and the hook lock in the invention, as shown in FIG. 13, the lock hook 17 comprises a round hole 33, a fixing rod 34 and a second water-swelling block 35, the fixing rod 34 is connected with the second water-swelling block 35, the fixing rod 34 and the second water-swelling block 35 are positioned in the round hole 33, after the lock hook 17 enters the soft soil 1, the groundwater enters the second water-swelling block 35 through a gap between the round hole 33 and the fixing rod 34, and the volume of the second water-swelling block 35 is increased to drive the fixing rod 34 to move and fix the lock hook 17 and the mounting groove 18.
An anti-floating method of an anti-floating anchor rod 2 in soft soil 1 comprises the following steps: the round tube 3 of the anchor rod 2 is driven into the soft soil 1, then the driving device 4 drives the rod 5 to enter the soft soil 1 from the outlet of the conveying cavity 6, the rod 5 is bent, and the part of the rod 5 entering the soft soil 1 is not parallel to the round tube 3.
Further, a plurality of inclinometers are installed inside the rod 5, and the installation positions of the inclinometers are as follows: the end part of the rod 5 far away from the circular tube 3 and entering soft soil 1 is provided with an inclinometer, the contact position of the rod 5 and the circular tube 3 is provided with a plurality of inclinometers, and the calculation method of the rod 5 on the vertical acting force and bending moment of the circular tube 3 of the anchor rod 2 is as follows:
(1) Step 1, setting the soil-entering length of the rod 5 as L, setting m+1 inclinometers in total, and dividing the part of the rod 5 with the total length of L into m sections in the soft soil 1; setting the number of the inclinometer at the junction of the rod 5 and the circular tube 3 as 1, the number of the inclinometer furthest away from the circular tube 3 as m+1, and sequentially increasing the number of the nodes between the inclinometer 1 and the inclinometer m+1;
(2) Step 2, the nodes corresponding to the ith inclinometer and the (i+1) th inclinometer are respectively the ith node and the (i+1) th node, the ith section is arranged between the ith node and the (i+1) th node, and the length of the ith section is L (i) Young's modulus of E (i) Moment of inertia I (i) The number corresponding to the node of the ith section, which is close to the circular tube 3, is i 1 The number corresponding to the node of the ith section far away from the circular tube 3 is i 2 The vertical displacement and the rotation angle corresponding to the node of the ith section close to the circular tube 3 are respectively
Figure BDA0003334120430000134
And->
Figure BDA0003334120430000135
The vertical displacement and the rotation angle corresponding to the node of the ith section far away from the circular tube 3 are respectively +.>
Figure BDA0003334120430000136
And->
Figure BDA0003334120430000137
Here, (1.ltoreq.i.ltoreq.m);
(3) Step 3, measuring the corresponding rotation angle theta of each node based on the inclinometer j The method comprises the steps of carrying out a first treatment on the surface of the Taking the vertical displacement v of the node when j=1 j When j is greater than 1, the vertical displacement on the node j is taken as
Figure BDA0003334120430000131
Thus obtaining the displacement and the rotation angle of each node;
(4) Step 4, from the length L of the ith section (i) Young's modulus E (i) Moment of inertia I (i) Vertical displacement at two nodes
Figure BDA0003334120430000138
And->
Figure BDA0003334120430000139
Corner on two nodes->
Figure BDA00033341204300001310
And->
Figure BDA00033341204300001311
Thereby calculating the node force ++on the two nodes on the i-th segment>
Figure BDA00033341204300001312
And->
Figure BDA00033341204300001313
Calculating bending moment +.>
Figure BDA00033341204300001314
And->
Figure BDA00033341204300001315
The calculation method comprises the following steps:
Figure BDA0003334120430000132
Figure BDA0003334120430000133
(5) Step 5, calculating the vertical force of the rod 5 on the round tube 3 of the anchor rod 2
Figure BDA0003334120430000141
Calculating the bending moment of the rod 5 to the round tube 3>
Figure BDA0003334120430000142
In the invention, the vertical force F and the bending moment M at the junction of the rod 5 and the circular tube 3 can check whether the stress of the rod 5 exceeds the strength of the rod 5.
Moreover, based on the vertical force F of the rod 5 on the circular tube 3 and the soil friction force born by the circular tube, the vertical force shared by the rod 5 and the circular tube 3 can be calculated and analyzed, and the soil friction force born by the circular tube 3 can be determined by a conventional method, for example, the axial strain is measured on the circular tube 3 in a segmented manner so as to calculate the lateral soil friction resistance.

Claims (8)

1. An anti anchor rod that floats in weak soil, its characterized in that: the device comprises a round tube, a driving device, a rod and a conveying chamber; the conveying chambers are multiple and penetrate through the circular tube, the outlets of the conveying chambers are arranged on the outer side wall of the circular tube, the rods are arranged in the conveying chambers in a one-to-one correspondence mode, the driving device is arranged in the circular tube, and the driving device is matched with the rods to drive one end of each rod to move from the outlet of the conveying chamber to the outside of the circular tube;
the auxiliary reinforcing device comprises a first auxiliary reinforcing device and a second auxiliary reinforcing device, wherein the first auxiliary reinforcing device and the second auxiliary reinforcing device are arranged in one-to-one correspondence with the rods; the first auxiliary reinforcing device comprises a pull rope and a tightening device, the tightening device is arranged on the outer side part of the circular tube, the tightening device comprises a motor and a roller fixedly connected with a rotating shaft of the motor, the pull rope is wound on the roller, one end of the pull rope is fixedly connected with the roller, and the other end of the pull rope is fixedly connected with one end of the rod, which is close to the outlet of the conveying cavity, through the outer side of the circular tube;
the second auxiliary reinforcing device comprises a locking piece, a first sleeve and a second sleeve, the second sleeve is sleeved outside the first sleeve and is in sliding connection, the locking piece is matched with the first sleeve, the second sleeve or the circular tube, the first sleeve and the second sleeve are fixedly connected through the locking piece, the first sleeve is hinged with the circular tube, a hinge point is located between an outlet of the conveying cavity and the bottom end of the circular tube, and the second sleeve is hinged with the rod.
2. The anti-floating anchor in soft soil according to claim 1, wherein: the driving device is a hydraulic cylinder, and the movable end of the hydraulic cylinder is matched with the tops of all the rods to drive one ends of all the rods to synchronously move out of the circular tube through the outlet of the conveying cavity.
3. The anti-floating anchor in soft soil according to claim 1, wherein: the locking piece is an electric heater which is fixedly arranged on the first sleeve, the second sleeve or the circular tube, the first sleeve is made of shape memory alloy, the electric heater heats the first sleeve to a first temperature, and the first sleeve is positioned at a first radius at the first temperature and slides freely in the second sleeve; the electric heater is characterized in that the first sleeve is at a second temperature when not heated, the first sleeve is at a second radius when at the second temperature, and the first sleeve cannot slide freely in the second sleeve; the second radius is greater than the first radius.
4. The anti-floating anchor in soft soil according to claim 1, wherein: the locking piece is an expansion strip coated with a slow release agent, the expansion strip is fixedly arranged on the inner wall of the second sleeve, and a gap between the first sleeve and the expansion strip is arranged so that the first sleeve and the second sleeve can slide relatively; the expansion strip prevents the first sleeve from moving in the second sleeve after being expanded by water.
5. The anti-floating anchor in soft soil according to claim 1, wherein: the device also comprises a circumferential reinforcing device, wherein the circumferential reinforcing device comprises a circumferential rope, a locking hook, a rope storage chamber and a mounting assembly; the annular rope is arranged on the outer side wall of the circular pipe, the lock hook is fixedly arranged on the annular rope, the rod is provided with a mounting groove for mounting the lock hook, the rope storage chamber is fixedly arranged on the outer side wall of the circular pipe, the lock hook and the mounting component are arranged inside the rope storage chamber, and the mounting component is used for mounting the hook lock into the mounting groove.
6. The anti-floating anchor in soft soil according to claim 5, wherein: the installation component contains first spring, push pedal, push rod and pusher, and first spring coupling stores rope room inner wall and push pedal, and the push pedal extrudees the latch hook, and push rod and pusher are connected, and push rod and latch hook contact, and pusher drive push rod are pressed the latch hook into the mounting groove, then pusher is withdrawed the push rod, and first spring extrusion push pedal is pressed the push rod below with another latch hook again at this moment.
7. The anti-floating anchor in soft soil according to claim 5, wherein: two adjacent circumferential ropes are connected by flexible cloth or silk screen.
8. The anti-floating anchor in soft soil according to claim 5, wherein: the circumferential rope is of a composite structure and comprises water-swelling particles and a water-permeable capsule wrapping the water-swelling particles.
CN202111292014.1A 2021-11-02 2021-11-02 Anti-floating anchor rod in soft soil Active CN114108620B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111292014.1A CN114108620B (en) 2021-11-02 2021-11-02 Anti-floating anchor rod in soft soil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111292014.1A CN114108620B (en) 2021-11-02 2021-11-02 Anti-floating anchor rod in soft soil

Publications (2)

Publication Number Publication Date
CN114108620A CN114108620A (en) 2022-03-01
CN114108620B true CN114108620B (en) 2023-07-07

Family

ID=80380550

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111292014.1A Active CN114108620B (en) 2021-11-02 2021-11-02 Anti-floating anchor rod in soft soil

Country Status (1)

Country Link
CN (1) CN114108620B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207362897U (en) * 2017-11-03 2018-05-15 刘晓理 For shale layer anti-float anchor rod, rope can churning hole flushing umbrella steel reinforcement cage enlarged footing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3835300A1 (en) * 1988-10-17 1990-04-19 Hilti Ag SPREADING ANCHOR
CN202595739U (en) * 2012-05-17 2012-12-12 王茂华 Anchor rod suitable for soft soil layer
CN210767523U (en) * 2019-09-24 2020-06-16 北京市燕通建筑构件有限公司 Sleeve assembly for connecting steel bars
CN213329134U (en) * 2020-08-20 2021-06-01 山东众联恒信工程集团有限公司 Counter-force device for tensioning basement anti-floating prestress anti-pulling anchor rod

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207362897U (en) * 2017-11-03 2018-05-15 刘晓理 For shale layer anti-float anchor rod, rope can churning hole flushing umbrella steel reinforcement cage enlarged footing

Also Published As

Publication number Publication date
CN114108620A (en) 2022-03-01

Similar Documents

Publication Publication Date Title
Sutman et al. Full-scale in-situ tests on energy piles: Head and base-restraining effects on the structural behaviour of three energy piles
CN111456782B (en) Grouting bonding prestress yielding anchor rod and construction method thereof
CN114108620B (en) Anti-floating anchor rod in soft soil
CN114673180B (en) Geotechnical engineering side slope support of high stability
TW201827695A (en) Flood gate control method and structure thereof capable of controlling the operation of the flood gate without the use of electricity
CN111305885B (en) Intelligent anchoring drainage monitoring and early warning integrated system
CN112878388B (en) Test method for detecting compressive bearing capacity of recoverable anchor rod end grouting body
CN114086551B (en) Anchor rod for increasing anti-buoyancy in soft soil based on impact reinforcement
CN114086607B (en) Anchor rod for increasing anti-buoyancy in soft soil
CN113802554A (en) Method for installing tension member of anchoring structure of anchoring cylinder and construction device used by method
CN109056717B (en) Support-free supporting device and construction method thereof
CN209760317U (en) Novel anchor backing plate device for basic test of anchor cable
CN216515770U (en) Novel uplift pile limit bearing capacity testing device
CN114086550A (en) Anti-floating anchor rod based on extension structure in soft soil
CN112411636A (en) Recoverable spiral steel-pipe pile self-balancing testing arrangement
CN220246911U (en) Slurry backflow prevention bag device
CN118223479A (en) Fastening type anchor rod device and construction method thereof
CN109372460A (en) Flexible cable inclinometer detector fishing device and its Refloatation method based on low-resistance
RU2252298C1 (en) Cast-in-place supporting structure erection method and cast-in- place supporting structure
CN219691563U (en) Sleeve valve tube for pressure type anchor rod
CN216277953U (en) Anti-shearing subsection yielding energy-absorbing extensible anchor rod cable
CN216246316U (en) Measuring device for building engineering technology
CN111271108B (en) Anchor rod cable series-parallel coordination support system capable of realizing load transfer
CN103741676B (en) The energy-conservation energy post of earth source heat pump
CN210460013U (en) Hinge type large-tonnage anchor device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant