CN115341537B - Self-adaptive anchor rod applied to expansive soil slope - Google Patents
Self-adaptive anchor rod applied to expansive soil slope Download PDFInfo
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- CN115341537B CN115341537B CN202211052219.7A CN202211052219A CN115341537B CN 115341537 B CN115341537 B CN 115341537B CN 202211052219 A CN202211052219 A CN 202211052219A CN 115341537 B CN115341537 B CN 115341537B
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- baffle ring
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- elastomer
- stage stress
- stress
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a self-adaptive anchor rod applied to an expansive soil slope, which can effectively strengthen the expansive soil rock-soil body by arranging a multistage stress elastomer and does not obstruct the expansive soil body when the water loss and shrinkage of the expansive soil occur.
Description
Technical Field
The invention relates to an anchor rod device, in particular to an adaptive anchor rod applied to an expansive soil slope.
Background
The expansive soil is also called as 'swelling and shrinking soil', the volume of the expansive soil is severely expanded after soaking, the volume of the expansive soil is obviously shrunk after water loss, and the clay mineral such as montmorillonite, illite and the like is contained in the clay, so the hydrophilicity is very strong, the expansive soil is high in plasticity clay, the bearing capacity is generally higher, the expansive soil has the characteristics of water absorption expansion, water loss shrinkage, repeated swelling and shrinking deformation, water loss bearing capacity attenuation, dry shrinkage crack development and the like, the property is extremely unstable, the uneven vertical or horizontal swelling and shrinking deformation of a building is often caused, displacement, cracking, tilting and even damage are caused, the phenomenon of group is often caused, particularly a lower-layer flat house is serious, the hazard is very large, the crack is characterized by vertical cracks of an outer wall, inclined cracks at the end parts, horizontal cracks under a windowsill, symmetric or asymmetric inverted splayed cracks of inner and outer gable walls and the like, the existing protection and reinforcement device for the rock-soil layer of the expansive soil is mainly reinforced by anchor rods, the anchor rod is a rod system structure for reinforcing a rock-soil body, the defect that the tensile capacity of the rock-soil body is far lower than the compressive capacity is overcome through the longitudinal tension action of the anchor rod body, but the existing anchor rod is generally of a rigid structure, and can meet the reinforcing action on the rock-soil layer of the expansive soil when the immersed volume of the expansive soil is severely expanded, but the volume of the expansive soil is obviously contracted after water loss, the existing anchor rod device can generate resistance to the expansive soil when the expansive soil is contracted due to the inelastic deformation of the rigid structure, the deformation generated by the stress of the existing anchor rod device is smaller, and the longitudinal tension of the anchor rod body cannot be gradually increased according to the displacement of the expansive soil, so that the longitudinal tension of the anchor rod body is increased when the displacement of the expansive soil is increased, the reinforcement requirement when the displacement is large in the process of soaking the expansive soil can not be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the self-adaptive anchor rod applied to the expansive soil slope, which not only can strengthen the expansive soil body through the longitudinal tension of the multistage stress elastomer to prevent the expansive soil body from larger displacement when the expansive soil body is immersed in water for expansion, but also can restore the initial state of the multistage stress elastomer after the expansive soil body is dehydrated and contracted without obstructing the expansive soil body from restoring the initial state, and the longitudinal tension of the anchor rod body is gradually increased when the expansive soil body is larger displaced through the plurality of baffle rings on the multistage stress elastomer, so that the displacement of the expansive soil body is limited.
The technical scheme that it was solved is, including the screw rod, the screw rod outwards stretches out the partial screw thread cooperation of ground body and has the nut, is equipped with the backing plate between nut and the ground body part, and the backing plate center offered with screw rod complex through-hole, the screw rod inwards stretches into the first-stage atress elastomer of ground body part fixedly connected with, the anchor section that the inside depths of ground body were located to first-stage atress elastomer other end fixedly connected with, first-stage atress elastomer is hollow structure and first baffle ring of coaxial fixedly connected with on the first-stage atress elastomer, is equipped with multistage atress elastic structure on the anchor section and is used for improving the anchoring ability of stock step by step and prevents that the ground body from taking place extensive displacement.
Preferably, the multistage stress elastic structure comprises a second-stage stress elastic body which is fixedly connected to the upper end face of the anchoring section and is coaxially arranged with the first-stage stress elastic body, the second-stage stress elastic body is of a hollow structure, and a second baffle ring is coaxially and fixedly connected to the second-stage stress elastic body.
Preferably, the multistage stress elastic structure further comprises a third-stage stress elastic body which is fixedly connected to the upper end face of the anchoring section and is coaxially arranged with the second-stage stress elastic body, the third-stage stress elastic body is of a hollow structure, and a third baffle ring is coaxially and fixedly connected to the third-stage stress elastic body.
Preferably, the outer diameter of the first baffle ring is smaller than the inner diameter of the second-stage stress elastic body, so that the first baffle ring can vertically move relatively in the second-stage stress elastic body, a through hole is formed in the center of the second baffle ring, the radius of the through hole is smaller than the outer diameter of the first baffle ring, and the first baffle ring is driven to move together when contacting the second baffle ring.
Preferably, the outer diameter of the second baffle ring is smaller than the inner diameter of the third-stage stressed elastic body, so that the second baffle ring can move vertically relatively in the third-stage stressed elastic body, a through hole is formed in the center of the third baffle ring, and the radius of the through hole is smaller than the outer diameter of the second baffle ring, so that the second baffle ring is driven to move together when contacting the third baffle ring.
Preferably, the first-stage stress elastomer, the second-stage stress elastomer and the third-stage stress elastomer are of spring structures, the radius of the second-stage stress elastomer is larger than that of the first-stage stress elastomer, and the radius of the third-stage stress elastomer is larger than that of the second-stage stress elastomer.
The invention has the beneficial effects that:
1. the device can not only strengthen the expansive soil body by the longitudinal tension of the multistage stress elastomer to prevent the expansive soil body from larger displacement when the expansive soil body is immersed and expanded, but also restore the initial state of the multistage stress elastomer after the expansive soil body is dehydrated and contracted without obstructing the expansive soil body from restoring the initial state;
2. the plurality of baffle rings on the multistage stress elastic body are arranged, so that the longitudinal tension of the anchor rod body is gradually increased when the expansive soil body is subjected to larger displacement, and the displacement of the expansive soil body is limited.
Drawings
FIG. 1 is a schematic view of the whole of the present invention.
FIG. 2 is a schematic view of a screw and first stage forced elastomer apparatus of the present invention.
FIG. 3 is a schematic view of a second stage force-bearing elastomer and second retainer ring assembly of the present invention.
FIG. 4 is a schematic view of a third stage force-receiving elastomer and third retainer ring assembly of the present invention.
Fig. 5 is a schematic view of the assembly of the present invention within an expansive soil rock matrix.
Reference numerals
1. The device comprises a screw rod, a nut, a backing plate, a first-stage stress elastomer, an anchoring section, a first baffle ring, a second-stage stress elastomer, a second baffle ring, a third-stage stress elastomer and a third baffle ring, wherein the screw rod, the nut, the backing plate, the first-stage stress elastomer, the anchoring section, the first baffle ring, the second-stage stress elastomer, the second baffle ring, the third-stage stress elastomer and the third baffle ring are arranged in sequence, and the third baffle ring is arranged in sequence.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to fig. 1-5.
When the invention is used, firstly, one end of a screw rod 1 fixedly connected with an anchoring section 5 of an anchor rod is inserted into an expanded soil body, a part of the screw rod 1 extending outwards from the rock body is in threaded fit with a nut 2, a backing plate 3 is arranged between the nut 2 and the rock body part, a through hole matched with the screw rod 1 is arranged in the center of the backing plate 3, the part of the screw rod 1 extending inwards from the rock body part is fixedly connected with a first-stage stress elastomer 4, the other end of the first-stage stress elastomer 4 is fixedly connected with the anchoring section 5 positioned deep in the rock body, the first-stage stress elastomer 4 is of a hollow structure, a first baffle ring 6 is coaxially and fixedly connected on the first-stage stress elastomer 4, a multi-stage stress elastic structure is arranged on the anchoring section 5 to gradually improve the anchoring capacity of the anchor rod to prevent the rock body from displacement in a large scale, the multistage stress elastic structure comprises a second stage stress elastic body 7 which is fixedly connected to the upper end surface of the anchoring section 5 and is coaxially arranged with the first stage stress elastic body 4, the second stage stress elastic body 7 is of a hollow structure, a second baffle ring 8 is coaxially and fixedly connected to the second stage stress elastic body 7, the multistage stress elastic structure also comprises a third stage stress elastic body 9 which is fixedly connected to the upper end surface of the anchoring section 5 and is coaxially arranged with the second stage stress elastic body 7, the third stage stress elastic body 9 is of a hollow structure, a third baffle ring 10 is coaxially and fixedly connected to the third stage stress elastic body 9, the first stage stress elastic body 4, the second stage stress elastic body 7 and the third stage stress elastic body 9 are of a spring structure, the spring radius of the second stage stress elastic body 7 is larger than that of the first stage stress elastic body 4, the spring radius of the third stage stress elastic body 9 is larger than that of the second stage stress elastic body 7, then, the anchoring section 5 of the screw 1 is concreted to anchor the anchoring section 5 in the deep inside of the expansive soil rock-soil body, after anchoring is finished, the nut 2 is rotated to enable the backing plate 3 and the expansive soil rock-soil body to generate certain pressure, at the moment, the rod body of the screw 1 generates longitudinal tension under the threaded fit with the nut 2 and acts on the nut 2 to compress the nut 2 and the backing plate 3 and the expansive soil rock-soil body.
When the expansive soil body is displaced and the displacement is smaller, the expansive soil body is displaced to drive the backing plate 3 which is in compression contact with the expansive soil body and the screw rod 1 penetrating through the backing plate 3 to perform certain displacement, the screw rod 1 is pulled outwards to a certain distance from the expansive soil body, the screw rod 1 is pulled outwards to a certain distance to drive the first-stage stress elastomer 4 to elastically deform and stretch a certain distance in an elastic range, and at the moment, the longitudinal pulling force of the rod body of the screw rod 1 is increased by the elastic force generated by the elastic deformation of the first-stage stress elastomer 4 on the basis of the prior art, so that the pressure between the backing plate 3 and the expansive soil body can be increased, and further displacement of the expansive soil body is prevented.
When the displacement of the expansive soil body is larger, the screw rod 1 stretches outwards for a larger distance and drives the first-stage stress elastomer 4 to elastically deform in an elastic range and stretch for a larger distance, at the moment, the first baffle ring 6 fixedly connected to the first-stage stress elastomer 4 starts to contact the second baffle ring 8 fixedly connected to the second-stage stress elastomer 7 due to the larger elastic deformation generated by the first-stage stress elastomer 4, the first baffle ring 6 can move vertically relatively in the second-stage stress elastomer 7 due to the fact that the outer diameter of the first baffle ring 6 is smaller than the inner diameter of the second-stage stress elastomer 7, the center of the second baffle ring 8 is provided with a through hole, the radius of the through hole is smaller than the outer diameter of the first baffle ring 6, so that the first baffle ring 6 contacts the second baffle ring 8 to drive the second baffle ring 8 to move together, so after the first baffle ring 6 contacts with the second baffle ring 8 and drives the second baffle ring 8 to move together, the second stage stress elastomer 7 is elastically deformed and stretched for a certain distance in the elastic range under the drive of the movement of the second baffle ring 8, the elastic force generated by the elastic deformation of the second stage stress elastomer 7 acts on the first stage stress elastomer 4 through the first baffle ring 6 and the second baffle ring 8 which are contacted, so that the longitudinal pulling force of the rod body of the screw 1 increases the elastic force generated by the elastic deformation of the first stage stress elastomer 4 and the elastic force generated by the elastic deformation of the second stage stress elastomer 7 on the basis before, if the elastic deformation of the second stage stress elastomer 7 is larger, the second baffle ring 8 on the second stage stress elastomer 7 starts to contact the third baffle ring 10 fixedly connected with the third stage stress elastomer 9, like the above description, because the external diameter of the second baffle ring 8 is smaller than the internal diameter of the third-stage stressed elastic body 9, the second baffle ring 8 can move vertically relatively in the third-stage stressed elastic body 9, a through hole is formed in the center of the third baffle ring 10, the radius of the through hole is smaller than that of the second baffle ring 8, and the second baffle ring 8 is driven to move together with the third baffle ring 10 when contacting the third baffle ring 10, so that after the second baffle ring 8 contacts the third baffle ring 10 and drives the third baffle ring 10 to move together, the third-stage stressed elastic body 9 generates elastic deformation and stretches a certain distance in an elastic range under the driving of the third baffle ring 10, the elastic force generated by the elastic deformation of the third-stage stressed elastic body 9 acts on the second-stage stressed elastic body 7 through the second baffle ring 8 and the third baffle ring 10 which are contacted, the longitudinal tensile force of the screw 1 rod body increases the elastic force generated by the elastic deformation of the first-stage stressed elastic body 4 and the elastic force generated by the elastic deformation of the second-stage stressed elastic body 7 on the basis, and the elastic force generated by the elastic deformation of the third-stage stressed elastic body 9 can also be sleeved with a plurality of elastic bodies to achieve the maximum value of the elastic body of the anchor rod body, and the maximum value of the elastic body can be further expanded by the soil body of the elastic body can reach the maximum value of the elastic body 3 after the elastic body is expanded by the soil body, and the maximum value of the soil body is further expanded by the embodiment, and the maximum value of the elastic body is reached.
When the expansive soil is dehydrated and contracted, the stress elastic bodies at all levels are elastically deformed, so that the stress elastic bodies at all levels can be contracted to restore the initial state, and the expansive soil is not hindered from being contracted to restore the initial state.
Claims (4)
1. The self-adaptive anchor rod for the expansive soil slope is characterized by comprising a screw rod (1), wherein a part of the screw rod (1) extending outwards is in threaded fit with a nut (2), a base plate (3) is arranged between the nut (2) and the part of the rock soil body, a through hole matched with the screw rod (1) is formed in the center of the base plate (3), the part of the screw rod (1) extending inwards is fixedly connected with a first-stage stress elastomer (4), the other end of the first-stage stress elastomer (4) is fixedly connected with an anchoring section (5) positioned deep in the rock soil body, the first-stage stress elastomer (4) is of a hollow structure, a first baffle ring (6) is coaxially and fixedly connected to the first-stage stress elastomer (4), and the anchoring section (5) is provided with a multistage stress elastomer structure for gradually improving the anchoring capacity of the anchor rod so as to prevent the rock soil body from being displaced in a large range;
the multistage stress elastic structure comprises a second-stage stress elastic body (7) which is fixedly connected to the upper end face of the anchoring section (5) and is coaxially arranged with the first-stage stress elastic body (4), the second-stage stress elastic body (7) is of a hollow structure, and a second baffle ring (8) is coaxially and fixedly connected to the second-stage stress elastic body (7);
the outer diameter of the first baffle ring (6) is smaller than the inner diameter of the second-stage stressed elastic body (7), so that the first baffle ring (6) can vertically move relatively inside the second-stage stressed elastic body (7), a through hole is formed in the center of the second baffle ring (8), and the radius of the through hole is smaller than that of the first baffle ring (6), so that the first baffle ring (6) can drive the second baffle ring (8) to move together when contacting the second baffle ring (8).
2. The self-adaptive anchor rod for the expansive soil slope according to claim 1, further comprising a third-stage stress elastomer (9) fixedly connected to the upper end face of the anchoring section (5) and coaxially arranged with the second-stage stress elastomer (7), wherein the third-stage stress elastomer (9) is of a hollow structure, and a third baffle ring (10) is coaxially and fixedly connected to the third-stage stress elastomer (9).
3. The self-adaptive anchor rod for the expansive soil slope according to claim 2, wherein the outer diameter of the second baffle ring (8) is smaller than the inner diameter of the third-stage stressed elastic body (9) so that the second baffle ring (8) can move vertically relatively in the third-stage stressed elastic body (9), a through hole is formed in the center of the third baffle ring (10), and the radius of the through hole is smaller than the outer diameter of the second baffle ring (8) so that the second baffle ring (8) drives the third baffle ring (10) to move together when contacting the third baffle ring (10).
4. The self-adaptive anchor rod for the expansive soil slope according to claim 2, wherein the first-stage stress elastomer (4), the second-stage stress elastomer (7) and the third-stage stress elastomer (9) are of spring structures, the spring radius of the second-stage stress elastomer (7) is larger than that of the first-stage stress elastomer (4), and the spring radius of the third-stage stress elastomer (9) is larger than that of the second-stage stress elastomer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211052219.7A CN115341537B (en) | 2022-08-31 | 2022-08-31 | Self-adaptive anchor rod applied to expansive soil slope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211052219.7A CN115341537B (en) | 2022-08-31 | 2022-08-31 | Self-adaptive anchor rod applied to expansive soil slope |
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| Publication Number | Publication Date |
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| CN115341537A CN115341537A (en) | 2022-11-15 |
| CN115341537B true CN115341537B (en) | 2023-09-12 |
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| CN202211052219.7A Active CN115341537B (en) | 2022-08-31 | 2022-08-31 | Self-adaptive anchor rod applied to expansive soil slope |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863695A (en) * | 2016-05-03 | 2016-08-17 | 许国安 | Sectional and modular combined anchor rod capable of resisting large deformation and impact and assembling method of combined anchor rod |
| CN209855835U (en) * | 2019-05-17 | 2019-12-27 | 邹彩丽 | Combined anchor rod with elastic connecting sleeve for geotechnical engineering support |
| CN110924389A (en) * | 2019-12-10 | 2020-03-27 | 华北水利水电大学 | Device and system for intelligently monitoring stability of extensible anchor rod and acoustic emission rock-soil body under control of multistage stress and displacement |
| CN113863297A (en) * | 2021-09-29 | 2021-12-31 | 华北水利水电大学 | Sectional displacement multistage control negative poisson self-expansion anchor rod device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2470212A1 (en) * | 2004-06-30 | 2005-12-30 | Wilfred G. Morris | Dual mechanical and resin anchor bolt |
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2022
- 2022-08-31 CN CN202211052219.7A patent/CN115341537B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863695A (en) * | 2016-05-03 | 2016-08-17 | 许国安 | Sectional and modular combined anchor rod capable of resisting large deformation and impact and assembling method of combined anchor rod |
| CN209855835U (en) * | 2019-05-17 | 2019-12-27 | 邹彩丽 | Combined anchor rod with elastic connecting sleeve for geotechnical engineering support |
| CN110924389A (en) * | 2019-12-10 | 2020-03-27 | 华北水利水电大学 | Device and system for intelligently monitoring stability of extensible anchor rod and acoustic emission rock-soil body under control of multistage stress and displacement |
| CN113863297A (en) * | 2021-09-29 | 2021-12-31 | 华北水利水电大学 | Sectional displacement multistage control negative poisson self-expansion anchor rod device |
Non-Patent Citations (1)
| Title |
|---|
| 膨胀土边坡自平衡预应力锚固方法研究;吴顺川;潘旦光;岩土工程学报;第30卷(第4期);31-36 * |
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