CN107268651B - Anchor rod-star-shaped member-ball foundation and construction method thereof - Google Patents
Anchor rod-star-shaped member-ball foundation and construction method thereof Download PDFInfo
- Publication number
- CN107268651B CN107268651B CN201610222833.1A CN201610222833A CN107268651B CN 107268651 B CN107268651 B CN 107268651B CN 201610222833 A CN201610222833 A CN 201610222833A CN 107268651 B CN107268651 B CN 107268651B
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- hole
- anchor rod
- star
- anchor
- rod
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
Abstract
The invention relates to an anchor rod-star-shaped member-ball foundation, which comprises a star-shaped member, one or more anchor rods, and a backing plate and an anchor plate which are matched with the anchor rods. The star-shaped component is provided with a plurality of extending arms which extend out in the radial direction, and the center of the star-shaped component is provided with an anchor rod hole I; the center of the backing plate is provided with an anchor rod hole III; the anchor rod comprises a rod body and a plurality of support rods hinged with the lower part of the rod body; the length of the support rod is larger than the radius of the cavity at the bottom of the hole and is larger than the length from the hinge part of the anchor rod body and the support rod to the bottom end of the anchor rod body; an anti-water explosive with a detonator is arranged around the joint of the rod body and the support rod, and a plurality of support rods hinged with the rod body are turned over towards the upper end of the rod body and bound around the anti-water explosive; the bottom end of the anchor rod and a plurality of struts hinged with the anchor rod are anchored, and the top ends of the anchor rods respectively penetrate through anchor rod holes I at corresponding positions of the star-shaped members and penetrate through anchor rod holes III of the backing plate to be connected with the anchor plate. The invention also discloses a construction method of the foundation. The invention has simple structure, saves investment and reduces waste soil.
Description
Technical Field
The invention relates to a soil foundation reinforcement and foundation form, in particular to an anchor rod-star-shaped member-ball foundation and a construction method thereof.
Background
Currently, most foundations are compression-resistant foundations, i.e., foundations mainly bear vertical loads applied by an upper structure and meet deformation and stability requirements, and typically include independent foundations, strip foundations, raft foundations, and the like. The anti-pulling foundation mainly comprises a large excavation foundation, a digging and expanding foundation, a blasting and expanding pile foundation and the like; the construction of the foundation type of large excavation, the foundation type of digging and expanding and the foundation type of expanding and expanding has great difficulty, and the problems of large engineering quantity, long time consumption, high cost, great damage to the environment, limited resistance, unsatisfactory reinforcement effect and the like, which can be provided, are all existed, the problems are more prominent under the condition of the soil foundation, and the large deformation of the soil foundation and the stability of the foundation become key problems which are needed to be solved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the anchor rod-star-shaped member-ball foundation which reduces disturbance to the soil foundation, improves compression resistance and pulling resistance, optimizes a load transmission mechanism and reduces deformation of the soil foundation.
Another technical problem to be solved by the invention is to provide a construction method of the anchor rod-star-shaped member-ball foundation.
In order to solve the above problems, the invention provides an anchor rod-star-shaped member-ball foundation, which is characterized in that: the device comprises a star-shaped member embedded in a soil foundation, one or more anchor rods, a backing plate and an anchor plate, wherein the upper surface of the star-shaped member is flush with the ground, and the backing plate and the anchor plate are matched with the anchor rods; the star-shaped member is provided with a plurality of extending arms which extend radially, and the center of the star-shaped member is provided with an anchor rod hole I; the center of the backing plate is provided with an anchor rod hole III; the anchor rod comprises a rod body and a plurality of support rods hinged with the lower part of the rod body; the length of the support rod is larger than the radius of the cavity at the bottom of the hole and is larger than the length from the hinge part of the anchor rod body and the support rod to the bottom end of the anchor rod body; a water-resistant explosive with a detonator is arranged around the joint of the rod body and the supporting rod, and a plurality of supporting rods hinged with the rod body are turned over towards the upper end of the rod body and bound around the water-resistant explosive; the bottom end of the anchor rod and a plurality of struts hinged with the anchor rod are anchored, and the top ends of the anchor rods respectively penetrate through the anchor rod holes I at the corresponding positions of the star-shaped members and penetrate through the anchor rod holes III of the backing plate to be connected with the anchor plate.
The soil foundation is one or more of silt, mucky soil, cohesive soil, silt soil, loess, sandy soil, artificial filling soil and broken stone soil foundation.
The star-shaped member is provided with a fixing piece.
The number of the extending arms is three or more.
The backing plate is provided with a grouting hole.
The outer end of each arm is provided with an anchor rod hole II; and the top ends of the anchor rods respectively penetrate through the anchor rod holes II at the corresponding positions of the star-shaped members and penetrate through the anchor rod holes III of the backing plate to be connected with the anchor plates.
The center of the star-shaped member is provided with an anchor rod hole I, and the outer end of each extending arm is provided with an anchor rod hole II; the top end of the anchor rod passes through the anchor rod hole I and the anchor rod hole II at the corresponding positions of the star-shaped component respectively, and passes through the anchor rod hole III of the backing plate to be connected with the anchor plate.
The construction method of the anchor rod-star-shaped member-ball foundation comprises the following steps:
leveling a selected position;
secondly, punching a central anchor rod hole I of the corresponding star-shaped component and anchor rod holes II at the outer ends of the extending arms in the soil foundation, wherein the central hole is deep, and the holes at the outer ends of the extending arms are shallow;
thirdly, passing a grouting pipe with a nozzle through the step, placing the obtained hole at a preset depth for treating the soil foundation, punching the soil foundation by cement slurry, simultaneously rotating and lifting the grouting pipe, and solidifying to form a cement soil cylinder;
taking the formed cement soil cylinder as a supporting point of the star-shaped member, and digging and pouring pits of the star-shaped member according to design requirements;
fifthly, setting drilling holes according to the following three conditions along the formed shaft of the cement soil cylinder according to the design requirement;
drilling a hole at the position corresponding to the anchor rod hole I in the center of the star-shaped member;
ii) drilling a hole at the position corresponding to the anchor rod hole II at the outer end of each extending arm of the star-shaped member;
iii, drilling a hole corresponding to the anchor rod hole I in the center of the star-shaped member and the anchor rod hole II at the outer end of each arm, wherein the center hole is deep and the hole at the outer end of each arm is shallow;
performing blasting on the hole bottoms of the drill holes in each cement soil cylinder according to 50-400 g of the first-time drug loading, 100-400 g of the second-time drug loading and 200-400 g of the third-time drug loading, …, wherein the drug loading is gradually increased until the hole bottoms are expanded into cavities;
the size of the cavity at the bottom of the hole is measured, specifically:
(1) preparing measuring ropes with different lengths and lengths larger than the drilling depth, wherein the measuring ropes with different lengths and the lengths are equivalent to wood sticks with the diameters of the cavities at the bottom of the holes;
(2) one end of each of the two measuring ropes is respectively tied at two ends of the wood stick, and the measuring ropes are marked with size marks;
(3) the other ends of the two measuring ropes which are tied with the wood stick are lifted to convey the wood stick into the cavity at the hole bottom and lift up and down, when one end of the wood stick is clamped with the wall of the cavity at the hole bottom and the size marks on the two measuring ropes are consistent, the wood stick is in a horizontal position, and the length of the wood stick at the moment is the diameter of the cavity at the hole bottom;
pouring the star-shaped member according to design requirements;
installing a water-resistant explosive with a detonator around the joint of the anchor rod body and the supporting rod, and then overturning and binding a plurality of supporting rods hinged with the anchor rod body around the water-resistant explosive towards the upper end of the anchor rod body;
the water-resistant explosive carried by the anchor rod body is arranged at the bottom of the drilling hole in the corresponding cement-soil cylinder through different anchor rod holes I and anchor rod holes II of the star-shaped member, and the explosive is detonated instantly;
grouting into the drilled hole along the wall of the drilled hole to enable the grouting body to completely fill the cavity;
applying prestress after the grouting body is solidified and locking the top end of the anchor rod on an anchor plate;
and (3) refilling the grouting body into the drilling hole to the upper opening of the grouting hole through the grouting hole on the backing plate, and simultaneously casting the crack grouting body into the soil foundation crack.
Compared with the prior art, the invention has the following advantages:
1. firstly, detonation gas generated by explosive explosion in the invention is strongly impacted and compressed on the bottom of a drilling hole, so that the soil foundation around the drilling hole bottom is crushed to form a cavity with enough size, an anchoring body with a reinforced concrete expansion head at the bottom end is formed by grouting, and the provided anchoring force can be enough to stabilize the upper structure; secondly, detonation gas generated by explosive explosion acts on the bottom soil foundation of the drilling hole strongly, so that the soil foundation around the hole bottom is compressed, and simultaneously cracks in the soil foundation are pushed away, and after filling the grouting body, the physical and mechanical properties of the internal soil foundation (the soil foundation around the bottom of the drilling hole) are improved and improved; thirdly, explosive explosion is carried around the anchor rod body, struts hinged with the anchor rod body are scattered around the hinged struts and fall under the driving of explosion action, one end of each strut is hinged with the anchor rod body, the other end of each strut is scattered and falls down, the struts stop when touching the cavity wall at the bottom of the hole in the process of touching, the struts stand between the cavity wall at the bottom of the hole and the hinged position of the anchor rod body, namely the struts are obliquely upwards supported by taking the anchor rod body as a symmetrical axis, and then grouting is carried out on the whole cavity at the bottom of the hole to form a reinforced concrete spherical expansion head, and prestress and grouting are applied to construct the all-dimensional and three-dimensional composite anchoring.
2. The invention has simple structure, radically changes construction and foundation forms, obviously saves investment, reduces waste soil and protects environment.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a three-bolt shaft according to the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a cross-sectional view of the anchor of the present invention initially through the anchor shaft.
Fig. 4 is a schematic cross-sectional view of an initial loading section of the anchor of the present invention.
In the figure: 1-soil foundation 2-grouting body 3-drilling 4-anchor rod 5-soil foundation crack 6-star-shaped member 7-backing plate 8-anchor plate 9-crack grouting body 10-detonator 11-supporting rod 12-water-resistant explosive 13-grouting hole 14-drilling hole wall 15-hole bottom cavity 16-fixing piece 17-ground 18-cement soil cylinder.
Detailed Description
As shown in fig. 1-4, the anchor rod-star member-ball foundation comprises a star member 6 embedded in a soil foundation 1 and the upper surface of which is level with the ground 17, one or more anchor rods 4, and a backing plate 7 and an anchor plate 8 matched with the anchor rods 4.
The star-shaped member 6 is provided with a plurality of extending arms which extend radially, and the center of the star-shaped member is provided with an anchor rod hole I; the center of the backing plate 7 is provided with an anchor rod hole III; the anchor rod 4 comprises a rod body and a plurality of supporting rods 11 hinged with the lower part of the rod body; the length of the supporting rod 11 is larger than the radius of the hole bottom cavity 15 and is larger than the length from the hinge joint of the rod body of the anchor rod 4 and the supporting rod 11 to the bottom end of the rod body of the anchor rod 4; a water-resistant explosive 12 with a detonator 10 is arranged around the joint of the rod body and the supporting rods 11, and a plurality of supporting rods 11 hinged with the rod body are turned over towards the upper end of the rod body and bound around the water-resistant explosive 12; the bottom end of the anchor rod 4 and a plurality of struts 11 hinged with the bottom end of the anchor rod are anchored, and the top ends of the anchor rods respectively pass through anchor rod holes I at corresponding positions of the star-shaped members 6 and pass through anchor rod holes III of the backing plate 7 to be connected with the anchor plate 8.
Wherein: the soil foundation 1 is one or more of silt, mucky soil, cohesive soil, silt soil, loess, sandy soil, artificial filling soil and crushed stone soil foundation.
The star-shaped element 6 is provided with a fixture 16 for connection to the superstructure.
The number of the extending arms is three or more.
The backing plate 7 is provided with a grouting hole 13.
The outer end of each arm is provided with an anchor rod hole II; and the top ends of the anchor rods 4 respectively pass through anchor rod holes II at corresponding positions of the star-shaped members 6 and pass through anchor rod holes III of the backing plates 7 to be connected with the anchor plates 8.
The center of the star-shaped member 6 is provided with an anchor rod hole I, and the outer end of each extending arm is provided with an anchor rod hole II; the top ends of the anchor rods 4 respectively pass through anchor rod holes I and II at corresponding positions of the star-shaped member 6 and pass through anchor rod holes III of the backing plate 7 to be connected with the anchor plate 8.
The construction method of the anchor rod-star-shaped member-ball foundation comprises the following steps:
leveling a selected position;
secondly, a central anchor rod hole I corresponding to the star-shaped member 6 and anchor rod holes II at the outer ends of the extending arms are punched in the soil foundation 1, the central hole is deep, and the holes at the outer ends of the extending arms are shallow;
thirdly, passing the grouting pipe with the nozzle through, placing the obtained hole at a preset depth of the treated soil foundation 1, punching the soil foundation 1 by cement slurry, simultaneously rotating and lifting the grouting pipe, and solidifying to form a cement soil cylinder 18;
taking the formed cement soil cylinder 18 as a fulcrum of the star-shaped member 6, and digging pits for pouring the star-shaped member 6 according to design requirements;
fifthly, setting a drilling hole 3 along the axis of the formed cement soil cylinder 18 according to the design requirements according to the following three conditions;
drilling a hole corresponding to the position of the anchor rod hole I in the center of the star-shaped member 6;
ii, drilling a hole corresponding to the anchor rod hole II at the outer end of each extending arm of the star-shaped member 6;
iii, drilling a hole corresponding to the anchor rod hole I in the center of the star-shaped member 6 and the anchor rod hole II at the outer end of each arm, wherein the center hole is deep and the hole at the outer end of each arm is shallow;
performing blasting on the hole bottoms of the drill holes 3 in each cement soil cylinder 18 according to 50-400 g of the first-time drug loading, 100-400 g of the second-time drug loading and 200-400 g of the third-time drug loading, …, wherein the drug loading is gradually increased until the hole bottoms are expanded into cavities;
the size of the cavity 15 at the bottom of the well is determined specifically by:
(1) preparing measuring ropes with different lengths and lengths which are longer than the depth of the drilling hole 3, and wood sticks with the lengths corresponding to the diameters of the designed hole bottom cavities 15;
(2) one end of each of the two measuring ropes is respectively tied at two ends of the wood stick, and the measuring ropes are marked with size marks;
(3) the other ends of the two measuring ropes which are tied with the wood sticks are lifted up and down, the wood sticks are sent into the hole bottom cavity 15, when one end of each wood stick is clamped with the wall of the hole bottom cavity 15 and the size marks on the two measuring ropes are consistent, the wood sticks are in a horizontal position, and the length of each wood stick at the moment is the diameter of the hole bottom cavity 15;
pouring a star-shaped member 6 according to design requirements;
installing water-resistant explosive 12 with detonator 10 around the joint of the rod body of the anchor rod 4 and the supporting rod 11, and then overturning and binding a plurality of supporting rods 11 hinged with the rod body around the water-resistant explosive 12 towards the upper end of the rod body;
the water-resistant explosive 12 carried by the rod body of the anchor rod 4 is placed at the bottom of the hole 3 of the corresponding cement-soil cylinder 18 through different anchor rod holes I and anchor rod holes II of the star-shaped member 6, and the explosive is detonated instantly;
grouting into the borehole 3 along the borehole wall 14 to enable the grouting body 2 to completely fill the cavity;
after the grouting body 2 is solidified, applying prestress and locking the top end of the anchor rod 4 on the anchor plate 8;
and the grouting body 2 is refilled into the drilling hole 3 to the upper opening of the grouting hole 13 through the grouting hole 13 on the backing plate 7, and simultaneously, the crack grouting body 9 is cast on the soil-based crack 5.
The invention is applicable to, but not limited to, soil foundations, and can be used with rock and hard soil foundations with minor adjustments to the method and steps.
Claims (6)
1. An anchor-star-shaped member-ball foundation, characterized by: the device comprises a star-shaped member (6) embedded in a soil foundation (1) and the upper surface of which is flush with the ground (17), one or more anchor rods (4), and a backing plate (7) and an anchor plate (8) which are matched with the anchor rods (4); the star-shaped member (6) is provided with a plurality of extending arms which extend radially, and the center of the star-shaped member is provided with an anchor rod hole I; the center of the backing plate (7) is provided with an anchor rod hole III; the anchor rod (4) comprises a rod body and a plurality of supporting rods (11) hinged with the lower part of the rod body; the length of the supporting rod (11) is larger than the radius of the hole bottom cavity (15) and is larger than the length from the hinge position of the rod body of the anchor rod (4) and the supporting rod (11) to the bottom end of the rod body of the anchor rod (4); a water-resistant explosive (12) with a detonator (10) is arranged around the joint of the rod body and the supporting rod (11), and a plurality of supporting rods (11) hinged with the rod body are overturned towards the upper end of the rod body and bound around the water-resistant explosive (12); the bottom end of the anchor rod (4) and a plurality of struts (11) hinged with the anchor rod are anchored, and the top ends of the anchor rod penetrate through the anchor rod holes I at the corresponding positions of the star-shaped members (6) respectively and are connected with the anchor plate (8) together through the anchor rod holes III of the backing plate (7); the soil foundation (1) is one or more of silt, mucky soil, cohesive soil, silt soil, loess, sandy soil, artificial filling soil and broken stone soil foundation; the construction method of the anchor rod-star-shaped member-ball foundation comprises the following steps:
leveling a selected position;
secondly, punching a central anchor rod hole I corresponding to the star-shaped member (6) and anchor rod holes II at the outer ends of the extending arms in the soil foundation (1), wherein the central hole is deep, and the holes at the outer ends of the extending arms are shallow;
thirdly, passing a grouting pipe with a nozzle through the steps, placing the obtained hole at a preset depth for treating the soil foundation (1), punching the soil foundation (1) by cement slurry, simultaneously rotating and lifting the grouting pipe, and solidifying to form a cement soil cylinder (18);
taking the formed cement soil cylinder (18) as a fulcrum of the star-shaped member (6), and digging and pouring pits of the star-shaped member (6) according to design requirements;
fifthly, setting drilling holes (3) according to the following three conditions along the axis of the formed cement soil cylinder (18) according to the design requirement;
drilling a hole at the position corresponding to the anchor rod hole I in the center of the star-shaped member (6);
ii) drilling a hole corresponding to the anchor rod hole II at the outer end of each extending arm of the star-shaped member (6);
iii, drilling a hole corresponding to the anchor rod hole I in the center of the star-shaped member (6) and the anchor rod hole II at the outer end of each arm, wherein the center hole is deep and the hole at the outer end of each arm is shallow;
performing blasting on the hole bottoms of the drill holes (3) in each cement soil cylinder (18) according to 50-400 g of the first-time drug loading, 100-400 g of the second-time drug loading and 200-400 g of the third-time drug loading, …, wherein the drug loading is gradually increased until the hole bottoms are expanded into cavities;
the size of the cavity (15) at the bottom of the hole is measured, specifically:
(1) preparing measuring ropes with different lengths and lengths which are longer than the depth of the drilling hole (3), wherein the lengths of the measuring ropes are equal to the diameters of the designed hole bottom cavities (15);
(2) one end of each of the two measuring ropes is respectively tied at two ends of the wood stick, and the measuring ropes are marked with size marks;
(3) the other ends of the two measuring ropes which are tied with the wood sticks are lifted to convey the wood sticks into the hole bottom cavity (15) and lift up and down, when one end of each wood stick is clamped with the wall of the hole bottom cavity (15) and the size marks on the two measuring ropes are consistent, the wood sticks are in a horizontal position, and the length of each wood stick at the moment is the diameter of the hole bottom cavity (15);
pouring the star-shaped member (6) according to design requirements;
installing water-resistant explosive (12) with detonators (10) around the joint of the rod body of the anchor rod (4) and the supporting rod (11), and then overturning and binding a plurality of supporting rods (11) hinged with the rod body around the water-resistant explosive (12) towards the upper end of the rod body;
the water-resistant explosive (12) carried by the rod body of the anchor rod (4) is arranged at the bottom of the hole of the drill hole (3) in the corresponding cement-soil cylinder (18) through different anchor rod holes I and anchor rod holes II of the star-shaped member (6) to detonate the explosive instantly;
grouting the inside of the drill hole (3) along the wall (14) of the drill hole, so that the grouting body (2) completely fills the cavity;
after the grouting body (2) is solidified, applying prestress and locking the top end of the anchor rod (4) on the anchor plate (8);
and (3) filling the grouting body (2) into the drilling holes (3) through grouting holes (13) on the backing plate (7) to the upper openings of the grouting holes (13) again, and simultaneously casting crack grouting bodies (9) on the soil foundation cracks (5).
2. A rock bolt-star member-ball foundation according to claim 1, wherein: the star-shaped member (6) is provided with a fixing piece (16).
3. A rock bolt-star member-ball foundation according to claim 1, wherein: the number of the extending arms is three or more.
4. A rock bolt-star member-ball foundation according to claim 1, wherein: the backing plate (7) is provided with a grouting hole (13).
5. A rock bolt-star member-ball foundation according to claim 1, wherein: the outer end of each arm is provided with an anchor rod hole II; and the top ends of the anchor rods (4) respectively penetrate through the anchor rod holes II at the corresponding positions of the star-shaped members (6) and are connected with the anchor plates (8) through the anchor rod holes III of the backing plates (7).
6. A rock bolt-star member-ball foundation according to claim 1, wherein: the center of the star-shaped member (6) is provided with an anchor rod hole I, and the outer end of each extending arm is provided with an anchor rod hole II; the top end of the anchor rod (4) respectively passes through the anchor rod hole I and the anchor rod hole II at the corresponding positions of the star-shaped member (6), and passes through the anchor rod hole III of the backing plate (7) to be connected with the anchor plate (8).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215866 | 2016-04-09 | ||
| CN2016102158663 | 2016-04-09 |
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| CN107268651A CN107268651A (en) | 2017-10-20 |
| CN107268651B true CN107268651B (en) | 2023-09-01 |
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| CN201610222833.1A Active CN107268651B (en) | 2016-04-09 | 2016-04-12 | Anchor rod-star-shaped member-ball foundation and construction method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10298986A (en) * | 1997-05-02 | 1998-11-10 | Asahi Electric Works Ltd | Installation method for steel pipe anchor and explosive for the method |
| CN201704689U (en) * | 2010-06-17 | 2011-01-12 | 铁道第三勘察设计院集团有限公司 | Four-corner-reinforced pre-stressed anchor rope head for reinforcing rock slope |
| CN103132514A (en) * | 2011-11-30 | 2013-06-05 | 兰州大学 | Detent type anchor rod |
| CN103422511A (en) * | 2013-08-21 | 2013-12-04 | 国家电网公司 | Reinforcement method for transmission tower shallow base foundation under composite soft soil foundation |
-
2016
- 2016-04-12 CN CN201610222833.1A patent/CN107268651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10298986A (en) * | 1997-05-02 | 1998-11-10 | Asahi Electric Works Ltd | Installation method for steel pipe anchor and explosive for the method |
| CN201704689U (en) * | 2010-06-17 | 2011-01-12 | 铁道第三勘察设计院集团有限公司 | Four-corner-reinforced pre-stressed anchor rope head for reinforcing rock slope |
| CN103132514A (en) * | 2011-11-30 | 2013-06-05 | 兰州大学 | Detent type anchor rod |
| CN103422511A (en) * | 2013-08-21 | 2013-12-04 | 国家电网公司 | Reinforcement method for transmission tower shallow base foundation under composite soft soil foundation |
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| CN107268651A (en) | 2017-10-20 |
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