CN108360514B - Rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod and use method thereof - Google Patents

Rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod and use method thereof Download PDF

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Publication number
CN108360514B
CN108360514B CN201810336428.1A CN201810336428A CN108360514B CN 108360514 B CN108360514 B CN 108360514B CN 201810336428 A CN201810336428 A CN 201810336428A CN 108360514 B CN108360514 B CN 108360514B
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China
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sleeve
disc
anchor rod
shaped enlarged
extrusion
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CN108360514A (en
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高玉峰
周源
吴勇信
张飞
张宁
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Hohai University HHU
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Hohai University HHU
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/76Anchorings for bulkheads or sections thereof in as much as specially adapted therefor

Abstract

The invention provides a rotary extrusion double-layer nested disc-shaped enlarged footing anchor rod and a use method thereof. The invention is composed of an anchor rod main shaft, a disc-shaped enlarged head sleeve, an extrusion plastic expansion pipe and a rotary extrusion outer sleeve. After the anchor rod main shaft is arranged at a preset position, the anchor rod main shaft is sleeved into the disc-shaped enlarged footing sleeve, the disc-shaped enlarged footing sleeve is impacted and expanded by rotating and extruding the outer sleeve to form an expanded anchoring end, the anchor rod main shaft is fixed in a soil body or a rock body to form anti-pulling anchoring force, and the expanded disc-shaped enlarged footing sleeve is locked by extruding the plastic expansion pipe to prevent anchoring from loosening. The invention strengthens the connection between the soil bodies by a physical method, enhances the sliding resistance of the side slope, avoids the accidents of soil body sliding, collapse and the like caused by excavation of the side slope of the foundation pit, and improves the stability of the foundation pit. The construction efficiency is improved, and grouting materials are saved. The invention can be used for foundation pit excavation supporting engineering and improves the safety and stability of the foundation pit side slope. The device has the advantages of simple and convenient instrument operation and high construction efficiency.

Description

Rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod and use method thereof
Technical Field
The invention relates to a rotary extrusion double-layer nested disc-shaped enlarged footing anchor rod and a use method thereof. The invention is composed of an anchor rod main shaft, a disc-shaped enlarged head sleeve, an extrusion plastic expansion pipe and a rotary extrusion outer sleeve. After the anchor rod main shaft is arranged at a preset position, the disc-shaped enlarged footing sleeve is sleeved, the disc-shaped enlarged footing sleeve is impacted and expanded by rotating and extruding the outer sleeve, an expanded anchoring end is formed, the anchor rod main shaft is fixed in a soil body or a rock body to form an anti-pulling anchoring force, the expanded disc-shaped enlarged footing sleeve is locked by extruding the plastic expansion pipe, the anchoring relaxation is prevented, the anti-sliding force of a side slope is enhanced, accidents such as soil body sliding and collapse caused by excavation of the side slope of the foundation pit are avoided, and the stability of the foundation pit is improved. Aiming at the foundation pit excavation supporting engineering, the traditional grouting anchoring method is improved, the construction efficiency is greatly improved, and grouting materials are saved. The invention belongs to the relevant technical fields of geotechnical engineering, environmental engineering and the like.
Background
Along with the development of cities, urban land is more and more sparse, and the utilization of urban underground space is increased. In the method for developing the urban underground space, the non-excavation engineering technology is high in requirement and high in cost, so that excavation of the foundation pit is a common method for developing the underground space at present. However, the soil body property of many areas is poor, which brings difficulty to construction and is very important for the stability of the side slope of foundation pit excavation. The foundation pit excavation supporting forms are various, such as slope excavation, external anchor pulling and wall pile matched excavation, underground continuous wall anchor rod adding, slope protection pile anchor rod adding, stirring pile supporting, reverse construction method construction and the like. Among them, the anchor pipe support has the advantages of small occupied area, large construction space in the foundation pit, high construction speed and the like, so that the anchor pipe support is widely applied to foundation pit excavation support engineering. The anchoring mode of anchor pipe support is generally slip casting anchoring, and slip casting anchoring has two difficulties, one is that the full degree of slip casting can not be reliably guaranteed, and the other is that the slip casting solidification takes a period of time to play a role, and can not be used for timely reinforcement. In order to solve the two problems, the invention provides a novel anchor rod anchoring method, and the anchor rod is anchored by adopting an extrusion expansion method.
Disclosure of Invention
The invention aims to provide a rotary extrusion double-layer nested disc-shaped enlarged footing anchor rod and a using method thereof. After the anchor rod main shaft is arranged at a preset position, the disc-shaped enlarged footing sleeve is sleeved, the disc-shaped enlarged footing sleeve is impacted and expanded by rotating and extruding the outer sleeve, an expanded anchoring end is formed, the anchor rod main shaft is fixed in a soil body or a rock body to form an anti-pulling anchoring force, the expanded disc-shaped enlarged footing sleeve is locked by extruding the plastic expansion pipe, the anchoring relaxation is prevented, the anti-sliding force of a side slope is enhanced, accidents such as soil body sliding and collapse caused by excavation of the side slope of the foundation pit are avoided, and the stability of the foundation pit is improved. The method is mainly suitable for foundation pit excavation supporting engineering.
Solution of the invention
The invention provides a rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod, the whole structure of which comprises 4 parts: the anchor rod main shaft, the dish-shaped enlarged footing sleeve, extrusion plastic expansion pipe, rotatory extrusion outer sleeve.
The main shaft of the anchor rod is a solid round rod-shaped rod piece, the diameter of the end part of the rod piece is slightly larger than the rear part of the rod piece, the disc-shaped enlarged head sleeve is prevented from sliding out of the anchor rod, threads are arranged on the anchor rod at the position where the disc-shaped enlarged head sleeve is placed, and the disc-shaped enlarged head sleeve can be extruded and expanded by rotating and extruding the outer sleeve in a matched manner so as;
the disc-shaped expansion head sleeve is a metal cylinder with a surface provided with a cutting seam along the axial direction, a circle of circular groove is formed in the inner wall of the middle of the cylinder, the circular groove is extruded outwards and expanded under the condition that two ends of the disc-shaped expansion head sleeve are squeezed, a disc-shaped expansion head is formed, and the disc-shaped expansion head is inserted into the surrounding soil body or rock body to form anchoring force;
the extruded plastic expansion pipe is a flexible and easily-deformable plastic pipe, is sleeved on the anchor rod main shaft after the anchoring of the disc-shaped enlarged footing sleeve is finished, and seals the anchor rod hole after being extruded and deformed by rotating and extruding the outer sleeve to prevent the anchoring force from loosening;
the rotary extrusion outer sleeve is of a metal cylinder structure and is sleeved outside the anchor rod main shaft, the disc-shaped enlarged head sleeve is rotationally extruded, after the disc-shaped enlarged head is formed, the plastic expansion pipe is rotationally extruded by the rotary extrusion outer sleeve to fix the disc-shaped enlarged head sleeve, and the rotary extrusion outer sleeve is internally provided with a screw thread.
The use method of the rotary extrusion double-layer nested disc-shaped enlarged head anchor rod comprises the following steps:
1) excavating a foundation pit, leveling a construction site, measuring and positioning the foundation pit at a position where an anchor pipe needs to be arranged, and marking a drilling position;
2) before drilling operation, adjusting the angle of a drilling machine, drilling at a position marked by an anchor rod machine, and starting the drilling machine until drilling to a preset depth;
3) cleaning the hole after drilling is finished, and driving the anchor rod main shaft to a preset position;
4) the outer rotary extrusion sleeve is used for ejecting the disc-shaped expansion head sleeve to an anchoring position, the disc-shaped expansion head sleeve rotates along the thread, the disc-shaped expansion head sleeve is extruded and expanded outwards, and the outer rotary extrusion sleeve is pulled out after the expansion is finished;
5) and the outer rotary extrusion sleeve is used for conveying the extrusion plastic expansion pipe into the thread section of the anchor rod main shaft, and rotary extrusion is carried out, so that the extrusion plastic expansion pipe is in close contact with the disc-shaped enlarged footing sleeve, the outer rotary extrusion sleeve is pulled out after the contact and fixation of the extrusion plastic expansion pipe is finished, and the anchoring construction of an anchor rod is finished.
THE ADVANTAGES OF THE PRESENT INVENTION
The invention provides a rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod and a using method thereof. After the anchor rod main shaft is arranged at a preset position, the disc-shaped enlarged footing sleeve is sleeved, the disc-shaped enlarged footing sleeve is impacted and expanded by rotating and extruding the outer sleeve, an expanded anchoring end is formed, the anchor rod main shaft is fixed in a soil body or a rock body to form an anti-pulling anchoring force, the expanded disc-shaped enlarged footing sleeve is locked by extruding the plastic expansion pipe, the anchoring relaxation is prevented, the anti-sliding force of a side slope is enhanced, accidents such as soil body sliding and collapse caused by excavation of the side slope of the foundation pit are avoided, and the stability of the foundation pit is improved. The invention has simple operation, high construction efficiency and good benefit.
Drawings
FIG. 1 is a schematic view of a main shaft of a rock bolt
FIG. 2 is a schematic view of a dish-shaped enlarged head sleeve
FIG. 3 is a schematic view of the expanded sleeve with the disk-shaped enlarged head
FIG. 4 is a schematic view of an extruded plastic expansion pipe
FIG. 5 is a schematic view of a rotationally extruded outer sleeve
In the figure: 1 anchor rod main shaft, 2 threads, 3 disc-shaped enlarged head sleeves, 4 extrusion plastic expansion pipes and 5 rotary extrusion outer sleeves.
The specific implementation mode is as follows:
the invention provides a rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod, the whole structure of which comprises 4 parts: the anchor rod main shaft, the dish-shaped enlarged footing sleeve, extrusion plastic expansion pipe, rotatory extrusion outer sleeve.
The anchor rod main shaft 1 in the structure is a solid round rod-shaped rod piece, the diameter of the end part is slightly larger than the rear part, the disc-shaped enlarged footing sleeve 3 is prevented from sliding out of the anchor rod, the anchor rod on which the disc-shaped enlarged footing sleeve 3 is placed is provided with threads 2, and the disc-shaped enlarged footing sleeve 3 can be extruded and expanded by matching with the rotary extrusion of the outer sleeve 5, so that the fixation is realized;
the disc-shaped enlarged footing sleeve 3 in the structure is a metal cylinder with a cut seam axially formed on the surface, a circle of circular groove is formed on the inner wall of the middle part of the cylinder, the disc-shaped enlarged footing is formed by extruding and expanding the circular groove outwards under the condition that two ends of the disc-shaped enlarged footing sleeve 3 are extruded, and the disc-shaped enlarged footing is inserted into the surrounding soil body or rock body to form anchoring force;
the extrusion plastic expansion pipe 4 in the structure is a flexible and easily-deformable plastic pipe, is sleeved on the anchor rod main shaft 1 after the anchoring of the disc-shaped enlarged footing sleeve 3 is finished, and seals an anchor rod hole after being extruded and deformed by using the rotary extrusion outer sleeve 5 to prevent the anchoring force from loosening;
the rotary extrusion outer sleeve 5 in the structure is of a metal cylinder structure and is sleeved outside the anchor rod main shaft 1, the disc-shaped enlarged footing sleeve 3 is extruded in a rotary mode, after the disc-shaped enlarged footing is formed, the plastic expansion pipe 4 is extruded in a rotary mode through the rotary extrusion outer sleeve 5, the disc-shaped enlarged footing sleeve 3 is fixed, and screw threads are arranged inside the rotary extrusion outer sleeve 5.
The use method of the rotary extrusion double-layer nested disc-shaped enlarged head anchor rod comprises the following steps:
1) excavating a foundation pit, leveling a construction site, measuring and positioning the foundation pit at a position where an anchor pipe needs to be arranged, and marking a drilling position;
2) before drilling operation, adjusting the angle of a drilling machine, drilling at a position marked by an anchor rod machine, and starting the drilling machine until drilling to a preset depth;
3) cleaning the hole after drilling is finished, and drilling the anchor rod main shaft 1 to a preset position;
4) the outer rotary extrusion sleeve 5 is used for ejecting the disc-shaped expansion head sleeve 3 to an anchoring position through the outer rotary extrusion sleeve 5, the disc-shaped expansion head sleeve 3 rotates along the thread 2, the disc-shaped expansion head sleeve 3 is extruded and expanded outwards, and the outer rotary extrusion sleeve 5 is pulled out after the expansion is finished;
5) the screw thread 2 sections of the anchor rod main shaft 1 are sent into the extrusion plastic expansion pipe 4 by the rotary extrusion outer sleeve 5, and rotary extrusion is carried out, so that the extrusion plastic expansion pipe 4 is in close contact with the disc-shaped expansion head sleeve 3, the rotary extrusion outer sleeve 5 is pulled out after the extrusion plastic expansion pipe 4 is in contact fixation, and anchoring construction of an anchor rod is completed.

Claims (2)

1. A rotary extrusion double-layer nested dish-shaped enlarged footing stock, its overall structure contains 4 parts: stock main shaft, dish-shaped enlarged footing sleeve, extrusion plastic expansion pipe, rotatory extrusion outer sleeve, characterized by:
the main shaft of the anchor rod is a solid round rod-shaped rod piece, the diameter of the end part of the main shaft is slightly larger than the rear part of the main shaft, so that the disc-shaped enlarged head sleeve is prevented from sliding out of the anchor rod, threads are arranged on the anchor rod at the position where the disc-shaped enlarged head sleeve is placed, and the disc-shaped enlarged head sleeve can be extruded and expanded by rotating and extruding the outer sleeve in a matched manner so;
the disc-shaped expansion head sleeve is a metal cylinder with a surface provided with a cutting seam in the axial direction, and the inner wall of the middle part of the cylinder is provided with a circle of circular groove;
the extrusion plastic expansion pipe is a flexible and easily-deformable plastic pipe, is sleeved on the anchor rod main shaft after the anchoring of the disc-shaped enlarged footing sleeve is finished, and seals the anchor rod hole after the extrusion deformation of the rotary extrusion outer sleeve to prevent the anchoring force from loosening;
the rotary extrusion outer sleeve is of a metal cylinder structure, is sleeved outside the anchor rod main shaft and is used for rotationally extruding the disc-shaped enlarged head sleeve, and after the disc-shaped enlarged head is formed, the rotary extrusion outer sleeve is used for rotationally extruding the plastic expansion pipe to fix the disc-shaped enlarged head sleeve, and a screw thread is arranged inside the rotary extrusion outer sleeve.
2. The use method of the rotary extrusion double-layer nested disc-shaped enlarged footing anchor rod based on claim 1 comprises the following steps:
1) excavating a foundation pit, leveling a construction site, measuring and positioning the foundation pit at a position where an anchor pipe needs to be arranged, and marking a drilling position;
2) before drilling operation, adjusting the angle of a drilling machine, drilling at a position marked by an anchor rod machine, and starting the drilling machine until drilling to a preset depth;
3) cleaning the hole after drilling is finished, and driving the anchor rod main shaft to a preset position;
4) pushing the disc-shaped expansion head sleeve to an anchoring position by rotationally extruding the outer sleeve, rotating along the thread to extrude and expand the disc-shaped expansion head sleeve outwards, and pulling out the rotationally extruded outer sleeve after expansion is finished;
5) and the outer rotary extrusion sleeve is used for conveying the extrusion plastic expansion pipe into the thread section of the anchor rod main shaft, and rotary extrusion is carried out, so that the extrusion plastic expansion pipe is in close contact with the disc-shaped enlarged footing sleeve, the outer rotary extrusion sleeve is pulled out after the contact and fixation of the extrusion plastic expansion pipe is finished, and the anchoring construction of an anchor rod is finished.
CN201810336428.1A 2018-04-12 2018-04-12 Rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod and use method thereof Active CN108360514B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109057840B (en) * 2018-08-20 2020-03-31 中钢集团马鞍山矿山研究院有限公司 Self-adaptive grouting reinforcement anchor rod under high stress and anchoring construction method thereof
CN109083668B (en) * 2018-08-20 2020-05-19 中钢集团马鞍山矿山研究院有限公司 Be suitable for slip casting reinforcing stock of high stress broken country rock support usefulness

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10266200A (en) * 1997-03-28 1998-10-06 Moriya Koki Kk Preparation method of ground anchor, preparation method of lock bolt and these pressure-receiving structure
CN2763353Y (en) * 2005-01-12 2006-03-08 张建山 Repeatedly usable expansion type soil nailed wall
CN102322061A (en) * 2011-06-21 2012-01-18 北京航空航天大学 Construction device and construction method of end support anchor rod based on extruding-extending pore forming
CN104278674A (en) * 2014-09-22 2015-01-14 华汇工程设计集团股份有限公司 Recyclable expansion anchor rod and construction method thereof
CN105239569A (en) * 2015-09-24 2016-01-13 河海大学 Multi-section jointed recoverable screw enlarging-head anchor rod structure and construction method thereof
CN205349392U (en) * 2016-01-28 2016-06-29 山东安科矿山支护技术有限公司 Large aperture slip casting anchor rope
CN106153470A (en) * 2016-08-26 2016-11-23 中国电力科学研究院 Test device is pulled out on rock-bolt
CN106638655A (en) * 2017-02-22 2017-05-10 北京健安诚岩土工程有限公司 Conical-head tendon body post-tensioning pile foundation and construction process thereof
CN106760219A (en) * 2017-02-23 2017-05-31 江苏景源万河环境科技有限公司 A kind of reducing steel reinforcement cage and its enlarging anchor rod or pile foundation

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10266200A (en) * 1997-03-28 1998-10-06 Moriya Koki Kk Preparation method of ground anchor, preparation method of lock bolt and these pressure-receiving structure
CN2763353Y (en) * 2005-01-12 2006-03-08 张建山 Repeatedly usable expansion type soil nailed wall
CN102322061A (en) * 2011-06-21 2012-01-18 北京航空航天大学 Construction device and construction method of end support anchor rod based on extruding-extending pore forming
CN104278674A (en) * 2014-09-22 2015-01-14 华汇工程设计集团股份有限公司 Recyclable expansion anchor rod and construction method thereof
CN105239569A (en) * 2015-09-24 2016-01-13 河海大学 Multi-section jointed recoverable screw enlarging-head anchor rod structure and construction method thereof
CN205349392U (en) * 2016-01-28 2016-06-29 山东安科矿山支护技术有限公司 Large aperture slip casting anchor rope
CN106153470A (en) * 2016-08-26 2016-11-23 中国电力科学研究院 Test device is pulled out on rock-bolt
CN106638655A (en) * 2017-02-22 2017-05-10 北京健安诚岩土工程有限公司 Conical-head tendon body post-tensioning pile foundation and construction process thereof
CN106760219A (en) * 2017-02-23 2017-05-31 江苏景源万河环境科技有限公司 A kind of reducing steel reinforcement cage and its enlarging anchor rod or pile foundation

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