CN106013141A - Polyurethane anchor rod and construction process thereof - Google Patents

Polyurethane anchor rod and construction process thereof Download PDF

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Publication number
CN106013141A
CN106013141A CN201610557351.1A CN201610557351A CN106013141A CN 106013141 A CN106013141 A CN 106013141A CN 201610557351 A CN201610557351 A CN 201610557351A CN 106013141 A CN106013141 A CN 106013141A
Authority
CN
China
Prior art keywords
polyurethane
anchor rod
construction
soil
grouting
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.)
Pending
Application number
CN201610557351.1A
Other languages
Chinese (zh)
Inventor
周同和
Original Assignee
周同和
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 周同和 filed Critical 周同和
Priority to CN201610557351.1A priority Critical patent/CN106013141A/en
Publication of CN106013141A publication Critical patent/CN106013141A/en
Pending legal-status Critical Current

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Classifications

    • 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

Abstract

The invention discloses a construction process of a polyurethane grouting anchor rod and the polyurethane grouting anchor rod manufactured through the process. The construction process of the polyurethane grouting anchor rod comprises following steps of firstly, drilling; secondly, cement paste injecting while drill rod pulling out; thirdly, implanting of anchor rod ribs, wherein the anchor rod ribs are steel pipes formed through sleeving of floral pipes, and the bottoms of the steel pipes are of a closed structure; fourthly, pouring polyurethane materials into the steel pipes; fifthly, cement paste supplementary injecting and extruding the polyurethane materials out of the steel pipes; and sixthly, after the strength of the paste meets the design requirement, tensioning and locking. According to the construction process, the casing pipe pulling-out process does not appear in the anchorage segment, the secondary fracturing grouting process is not adopted, the grouting pressure of the whole process is not larger than 300 kPa, disturbance to a soil layer is avoided to the maximum limit, expansion performance of polyurethane is used for forming the dense anchorage body, and the construction process and the anchor rod are particularly suitable for soil layers of soft soil, miscellaneous soil, collapsible loess, expansive soil and the like.

Description

A kind of polyurethane anchor pole and construction technology thereof
Technical field
The present invention relates to a kind of bolt support technology field, be specifically related to a kind of polyurethane anchor pole and construction technology thereof.
Background technology
In prior art, building anchor rod construction process flow process is as follows:
Step one, plant equipment and material enter job site;
Step 2, making anchor rod body, anchor rod body can be made up of reinforcing bar, and the body of rod is arranged side by side two grouting plastic conduits along its length;
Step 3, anchor hole position;
Step 4, rig pore-forming or utilize casing pipe hole forming;
Step 5, clear hole;
Step 6, insert anchor rod body;
Step 7, a utilization wherein Grouting Pipe injects cement mortar or cement mortar from the bottom of hole to a pressure anchor hole, cast limit, limit detaches this Grouting Pipe (when utilizing casing pipe hole forming should when marginal not is starched limit extract sleeve pipe), until the waste liquid in anchor hole flows out along aperture, cement mortar or cement mortar fill whole anchor hole;
After step 8, slurry initial set, another pipeline is utilized to carry out secondary pressure slip casting, the space formed after filling up once-cast initial set;
After step 9, secondary grouting, because the contraction of anchoring body cement mortar or cement mortar carries out mending slurry.
The anchor pole formed by above construction technology is had the disadvantage that
(1) no matter using cement mortar or cement mortar to be irrigated, its amount of contraction is bigger, filling volume actual after solidification is negative, therefore, there is gap between anchor pole and hole wall, the frictional force between anchor pole and the soil body reduces, simultaneously, subsoil water easily clamp-ons gap, reduces the frictional force between anchor pole and hole wall further.
(2) soil body can be caused very large disturbances by secondary splitting grouting technique, and when applying in base pit engineering, this kind of technique can cause the foundation ditch periphery soil body to settle, and severe patient can cause periphery house, road to ftracture.
(3) in this anchor bolt construction, carrying out secondary grouting after needing for the first time to reach initial set after slip casting, injecting cement paste intensity reaches to carry out tensioning fixation after design requires, the construction period is longer.
Summary of the invention
The goal of the invention of the present invention is to provide a kind of polyurethane anchor pole, and provide its construction technology is the another goal of the invention of the present invention simultaneously.
Based on object above, the present invention takes techniques below scheme: a kind of polyurethane grouted anchor bar construction technology, comprises the following steps:
(1) boring;
(2) cement mortar is injected while rod pulling;
(3) implanting anchor pole muscle body after drilling rod all pulls out immediately, this anchor pole muscle body is the steel pipe being socketed to form by floral tube, and the bottom of steel pipe is enclosed construction;
(4) filling polyurethane material in steel pipe;
(5) remedial cementing slurry, extrudes polyurethane material outside steel pipe;
(6) treat that slurry intensity reaches design and requires that post-stretching is locked.
Step (1) is injected while boring cement paste dado.
The polyurethane grouted anchor bar prepared by described polyurethane grouted anchor bar construction technology.
Compared with prior art, the invention have the advantages that
1) there is not sleeve pipe withdrawal process, do not use secondary splitting grouting technique in the anchoring section of this construction technology, and whole process grouting pressure is not more than 300kPa, avoids the disturbance to soil layer to greatest extent.
2) dilatancy utilizing polyurethane forms closely knit anchoring body.
3) the present invention is especially suitable for the soil layers such as weak soil, miscellaneous fill, collapsible loess, swelled ground.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1
A kind of polyurethane grouted anchor bar construction technology, comprises the following steps:
(1) boring;Step (1) is injected while boring cement paste dado and forms cement paste dado layer 1;
(2) cement mortar is injected while rod pulling;
(3) implanting anchor pole muscle body 2 after drilling rod all pulls out immediately, this anchor pole muscle body 2 is the steel pipe being socketed to form by floral tube, and the bottom of steel pipe is enclosed construction;
(4) filling polyurethane material in anchor pole muscle body (steel pipe);
(5) remedial cementing slurry, extrudes polyurethane material outside steel pipe, and cement mortar and polyurethane material form slip casting anchorage zone 3;
(6) treat that slurry intensity reaches design and requires that post-stretching is locked.
The polyurethane grouted anchor bar prepared by above-mentioned polyurethane grouted anchor bar construction technology, as shown in Figure 1.

Claims (3)

1. a polyurethane grouted anchor bar construction technology, it is characterised in that comprise the following steps:
(1) boring;
(2) cement mortar is injected while rod pulling;
(3) implanting anchor pole muscle body, this anchor pole muscle body is the steel pipe being socketed to form by floral tube, and the bottom of steel pipe is enclosed construction;
(4) filling polyurethane material in steel pipe;
(5) remedial cementing slurry, extrudes polyurethane material outside steel pipe;
(6) treat that slurry intensity reaches design and requires that post-stretching is locked.
2. polyurethane grouted anchor bar construction technology as claimed in claim 1, it is characterised in that inject cement paste dado in step (1) while boring.
3. the polyurethane grouted anchor bar prepared by polyurethane grouted anchor bar construction technology described in claim 1 or 2.
CN201610557351.1A 2016-07-15 2016-07-15 Polyurethane anchor rod and construction process thereof Pending CN106013141A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610557351.1A CN106013141A (en) 2016-07-15 2016-07-15 Polyurethane anchor rod and construction process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610557351.1A CN106013141A (en) 2016-07-15 2016-07-15 Polyurethane anchor rod and construction process thereof

Publications (1)

Publication Number Publication Date
CN106013141A true CN106013141A (en) 2016-10-12

Family

ID=57118903

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610557351.1A Pending CN106013141A (en) 2016-07-15 2016-07-15 Polyurethane anchor rod and construction process thereof

Country Status (1)

Country Link
CN (1) CN106013141A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2236019Y (en) * 1994-11-04 1996-09-25 中国矿业大学 Mud injecting anchor rod for high-water-contained quick-condensing material
CN2415159Y (en) * 2000-01-25 2001-01-17 葛新 Polyurethane resin anchoring agent anchor rod
CN103215952A (en) * 2013-04-11 2013-07-24 河南博特工程防护有限公司 High polymer anchoring grouting method
CN103911994A (en) * 2014-04-18 2014-07-09 周同和 Prestressed anchor construction technology
CN204919373U (en) * 2015-02-02 2015-12-30 北京建筑大学 Spray of molten steel pipe slip casting structure
CN205089343U (en) * 2015-10-28 2016-03-16 河南工业和信息化职业学院 Mining high -pressure slip casting stock

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2236019Y (en) * 1994-11-04 1996-09-25 中国矿业大学 Mud injecting anchor rod for high-water-contained quick-condensing material
CN2415159Y (en) * 2000-01-25 2001-01-17 葛新 Polyurethane resin anchoring agent anchor rod
CN103215952A (en) * 2013-04-11 2013-07-24 河南博特工程防护有限公司 High polymer anchoring grouting method
CN103911994A (en) * 2014-04-18 2014-07-09 周同和 Prestressed anchor construction technology
CN204919373U (en) * 2015-02-02 2015-12-30 北京建筑大学 Spray of molten steel pipe slip casting structure
CN205089343U (en) * 2015-10-28 2016-03-16 河南工业和信息化职业学院 Mining high -pressure slip casting stock

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王继坤等: "花管注浆在基坑边坡加固工程中的应用", 《资源环境与工程》 *

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Application publication date: 20161012