CN112900431A - Material-saving high-water-pressure soil layer anchor cable construction method for loess area - Google Patents
Material-saving high-water-pressure soil layer anchor cable construction method for loess area Download PDFInfo
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- CN112900431A CN112900431A CN202011486849.6A CN202011486849A CN112900431A CN 112900431 A CN112900431 A CN 112900431A CN 202011486849 A CN202011486849 A CN 202011486849A CN 112900431 A CN112900431 A CN 112900431A
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- anchor cable
- anchor
- slope
- soil
- surface layer
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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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 discloses a material-saving construction method of a high-water-pressure soil layer anchor cable in a loess area, which comprises the following specific steps of: s1, repairing the slope; repairing the surface layer of the slope, removing soil blocks and stones protruding from the surface layer of the slope body, and filling soil in the sunken part of the surface layer of the slope body; s2, clearing slopes; compacting the soil on the surface layer of the side slope to ensure that the soil is fused with the surface layer of the side slope and does not fall off; removing loose soil, gravel and other objects remained outside the surface layer of the slope body; s3, paving a beam; and paving an anchor cable frame beam on the slope, and performing soil filling treatment between the anchor cable frame beam and the slope surface again. According to the material-saving high-water-pressure soil layer anchor cable construction method for the loess area, the overall structure of the anchor cable frame beam is more stable, the anchor cable frame beam can hardly shift or sink in the anchor cable construction process after the anchor cable frame beam is laid, and the stability of the anchor cable frame beam is also kept for a long time in the use process after the anchor cable construction is finished.
Description
Technical Field
The invention belongs to the technical field of anchor cable construction, and particularly relates to a material-saving method for constructing a high-water-pressure soil layer anchor cable in a loess area.
Background
The loess topography is a plateau or plain with a slightly undulating surface formed by a stacking action, and a gully therebetween is vertical and horizontal. The topography of the loess area generally conforms to the contours of the underlying ancient terrain. The furrows and valleys in the loess area are cut deeply, the valley slopes are very steep, and some places are even nearly upright. This is the most obvious feature of loess terrain. The valleys of the loess area have a unique form, which is a main component of the loess topography. The loess topography is not the comprehensive inheritance of ancient topography, but when loess piled up, suffers the effect of levelling of cutting apart again, and the tableland is cut apart into the roof beam, and the roof beam is cut apart into the loess, and the topography is more and more broken. The accumulational wind dust of eminence is easily corroded, and the accumulational wind dust of low department is easily preserved, makes the topography after loess piles up fluctuate poorly than ancient topography and fluctuate and be much less.
Due to the special topography of the loess area, when the anchor cable is constructed on the high-water-pressure coating of the loess area, the conditions of displacement, sinking and the like of the anchor cable frame beam after construction often occur, so that the stability of the anchor cable frame beam is not long enough; when the anchor cable is constructed in the loess area, after the anchor cable is installed in the anchor hole and grouted, a gap is formed between cement paste and the anchor cable, so that the connection between the cement paste and the anchor cable is unstable, and grouting is likely to be needed subsequently, and therefore more cement paste materials are needed.
Disclosure of Invention
The invention aims to provide a material-saving construction method of a high-water-pressure soil layer anchor cable in a loess area, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a material-saving construction method for high-water-pressure soil layer anchor cables in a loess area comprises the following specific steps:
s1, repairing the slope; repairing the surface layer of the slope, removing soil blocks and stones protruding from the surface layer of the slope body, and filling soil in the sunken part of the surface layer of the slope body;
s2, clearing slopes; compacting the soil on the surface layer of the side slope to ensure that the soil is fused with the surface layer of the side slope and does not fall off; removing loose soil, gravel and other objects remained outside the surface layer of the slope body;
s3, paving a beam; paving an anchor cable frame beam on the slope, and performing soil filling treatment between the anchor cable frame beam and the slope surface again;
s4, drilling; drilling anchor holes at the joints of the anchor cable frame beams, and cleaning soil and stones in the anchor holes;
s5, anchoring; installing the anchor cable into the anchor hole, and simultaneously pouring cement slurry into the anchor hole until the cement slurry reaches the joint of the anchor section of the anchor cable;
s6, adjusting the anchor; and respectively adjusting each group of anchor cables, wherein the adjustment operation comprises the following steps: fixing one end of the anchor cable extending out of the outside in the lock device to enable the anchor cable and the lock device to be relatively fixed, and driving the sleeve to rotate through the operation of an external motor to drive the anchor cable to integrally rotate for a plurality of circles in cement slurry in the anchor hole;
s7, anchoring; forming a concrete anchor inclined support at the outer side end of the anchor device, and fixing the rest exposed part of the anchor device by an anchor head;
s8, cleaning; and removing the crushed soil and the crushed stone on the anchor cable frame beam and the anchor cable body.
Preferably, in S1, after slope modification, the slope inclination angle change amount is controlled to be 2 ° to 5 °.
Preferably, in S2, after the gravel is taken out, the gravel pit is filled with crushed soil so that the slope surface is flush with each other and the angle deviation of each slope surface of the slope is controlled within 2 °.
Preferably, in S3, the boundary of the bottom of the anchor cable frame beam is connected to the subgrade side ditch; in S1 and S3, clay is used in the filling process, and the next step is performed after the clay is completely dried.
Preferably, in S4, the allowable deviation of hole position is + -50 mm.
Preferably, in S5, the water for preparing cement slurry is fresh water or salt water, and is mixed according to the equal volume, and the cement for preparing cement slurry is prepared by calcining, cooling and grinding limestone and clay at 1450-1650 ℃.
Preferably, in S6, the rotation speed of the anchor cable is 6-12r/min, the rotation is unidirectional, the rotation is stopped after 1min, and the sleeve on the anchor cable is taken down.
The invention has the technical effects and advantages that: according to the material-saving high-water-pressure soil layer anchor cable construction method in the yellow land area, after loose soil and gravel outside the surface layer of the slope are removed in S2 and after an anchor cable frame beam is laid in S3, soil filling treatment is respectively carried out, so that a gap is hardly formed between the anchor cable frame beam and the surface layer of the slope, the integral structure of the anchor cable frame beam is more stable, the anchor cable frame beam is hardly displaced or sunk in the anchor cable construction process after the anchor cable frame beam is laid, and the stability of the anchor cable frame beam is also kept for a long time in the using process after the anchor cable construction is finished;
through transferring the anchor after the anchor is adorned, even use external motor and sleeve cooperation work, drive the anchor rope of packing into the anchor eye and slowly rotate several circles, make anchor rope surface and grout intensive mixing, not only filled the space behind the anchor eye packing into anchor rope and grout, avoided follow-up discovery space after the trouble of repacking, also avoided because the grout solidifies the trouble that the anchor rope caused needs slip casting again, saved the grout material, and guaranteed the stability that links up between grout solidification back and the anchor rope.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a material-saving construction method of a high-water-pressure soil layer anchor cable in a loess area, which comprises the following specific steps of:
s1, repairing the slope; repairing the surface layer of the slope, removing soil blocks and stones protruding from the surface layer of the slope body, and filling soil in the sunken part of the surface layer of the slope body;
s2, clearing slopes; compacting the soil on the surface layer of the side slope to ensure that the soil is fused with the surface layer of the side slope and does not fall off; removing loose soil, gravel and other objects remained outside the surface layer of the slope body;
s3, paving a beam; paving an anchor cable frame beam on the slope, and performing soil filling treatment between the anchor cable frame beam and the slope surface again;
s4, drilling; drilling anchor holes at the joints of the anchor cable frame beams, and cleaning soil and stones in the anchor holes;
s5, anchoring; installing the anchor cable into the anchor hole, and simultaneously pouring cement slurry into the anchor hole until the cement slurry reaches the joint of the anchor section of the anchor cable;
s6, adjusting the anchor; and respectively adjusting each group of anchor cables, wherein the adjustment operation comprises the following steps: fixing one end of the anchor cable extending out of the outside in the lock device to enable the anchor cable and the lock device to be relatively fixed, and driving the sleeve to rotate through the operation of an external motor to drive the anchor cable to integrally rotate for a plurality of circles in cement slurry in the anchor hole;
s7, anchoring; forming a concrete anchor inclined support at the outer side end of the anchor device, and fixing the rest exposed part of the anchor device by an anchor head;
s8, cleaning; and removing the crushed soil and the crushed stone on the anchor cable frame beam and the anchor cable body.
Specifically, in S1, after slope repair, the slope inclination angle change is controlled to be 2 ° to 5 °.
Specifically, in S2, after the gravel is taken out, the gravel pit is filled with crushed soil, so that the surface of the side slope is flush, and the angle deviation of each part of the slope surface of the side slope is controlled within 2 °.
Specifically, in S3, the boundary of the bottom of the anchor cable frame beam is connected to the subgrade gutter; in S1 and S3, clay is used in the filling process, and the next step is performed after the clay is completely dried.
Specifically, in S4, the allowable deviation of the hole position is. + -. 50 mm.
Example 1
Specifically, in S5, the water for preparing cement slurry is fresh water or salt water, and the cement for preparing cement slurry is prepared from limestone and clay through calcining at 1450 deg.C, cooling and grinding.
Specifically, in S6, the rotation speed of the anchor cable is 6r/min, the rotation is unidirectional, the rotation is stopped after 1min, and the sleeve on the anchor cable is taken down.
Example 2
Specifically, in S5, the water used to prepare the cement slurry is fresh water or salt water mixed in equal volume, and the cement used to prepare the cement slurry is prepared from limestone and clay through calcining at 1550 ℃, cooling and grinding.
Specifically, in S6, the rotation speed of the anchor cable is 10r/min, the rotation is unidirectional, the rotation is stopped after 1min, and the sleeve on the anchor cable is taken down.
Example 3
Specifically, in S5, the water used to prepare the cement slurry is fresh water or salt water mixed according to equal volume, and the cement used to prepare the cement slurry is prepared by calcining limestone and clay at 1650 ℃, cooling and grinding.
Specifically, in S6, the rotation speed of the anchor cable is 12r/min, the rotation is unidirectional, the rotation is stopped after 1min, and the sleeve on the anchor cable is taken down.
From the results of the multiple tests of the above three examples, the following conclusions are reached:
when the cement for preparing the cement paste is prepared by calcining limestone and clay at 1550 ℃, cooling and grinding, the prepared cement paste has better stability and fixation effect after solidification; when the rotation speed of the anchor cable is 12r/min, the probability of the existence of the gap in the anchor hole is the lowest after the anchor cable rotates in the anchor hole for 1 minute.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A material-saving construction method for high-water-pressure soil layer anchor cables in a loess area is characterized by comprising the following specific steps:
s1, repairing the slope; repairing the surface layer of the slope, removing soil blocks and stones protruding from the surface layer of the slope body, and filling soil in the sunken part of the surface layer of the slope body;
s2, clearing slopes; compacting the soil on the surface layer of the side slope to ensure that the soil is fused with the surface layer of the side slope and does not fall off; removing loose soil, gravel and other objects remained outside the surface layer of the slope body;
s3, paving a beam; paving an anchor cable frame beam on the slope, and performing soil filling treatment between the anchor cable frame beam and the slope surface again;
s4, drilling; drilling anchor holes at the joints of the anchor cable frame beams, and cleaning soil and stones in the anchor holes;
s5, anchoring; installing the anchor cable into the anchor hole, and simultaneously pouring cement slurry into the anchor hole until the cement slurry reaches the joint of the anchor section of the anchor cable;
s6, adjusting the anchor; and respectively adjusting each group of anchor cables, wherein the adjustment operation comprises the following steps: fixing one end of the anchor cable extending out of the outside in the lock device to enable the anchor cable and the lock device to be relatively fixed, and driving the sleeve to rotate through the operation of an external motor to drive the anchor cable to integrally rotate for a plurality of circles in cement slurry in the anchor hole;
s7, anchoring; forming a concrete anchor inclined support at the outer side end of the anchor device, and fixing the rest exposed part of the anchor device by an anchor head;
s8, cleaning; and removing the crushed soil and the crushed stone on the anchor cable frame beam and the anchor cable body.
2. The material-saving loess area high water pressure soil layer anchor cable construction method as claimed in claim 1, wherein: in S1, after slope repairing, the slope inclination angle change is controlled at 2-5 degrees.
3. The material-saving loess area high water pressure soil layer anchor cable construction method as claimed in claim 1, wherein: and S2, filling crushed soil into the gravel pit after taking out the gravel, so that the surface of the side slope is flush, and the angle deviation of each part of the slope surface of the side slope is controlled within 2 degrees.
4. The material-saving loess area high water pressure soil layer anchor cable construction method as claimed in claim 1, wherein: in S3, the boundary of the bottom of the anchor cable frame beam is connected with a roadbed side ditch; in S1 and S3, clay is used in the filling process, and the next step is performed after the clay is completely dried.
5. The material-saving loess area high water pressure soil layer anchor cable construction method as claimed in claim 1, wherein: in S4, the allowable deviation of hole position is. + -.50 mm.
6. The material-saving loess area high water pressure soil layer anchor cable construction method as claimed in claim 1, wherein: in S5, the water for preparing cement paste is fresh water or salt water mixed according to equal volume, and the cement for preparing cement paste is prepared by calcining limestone and clay at 1450-1650 ℃, cooling and grinding.
7. The material-saving loess area high water pressure soil layer anchor cable construction method as claimed in claim 1, wherein: and S6, rotating the anchor cable in a unidirectional mode at the rotating speed of 6-12r/min for 1min, stopping rotating the anchor cable, and taking down the sleeve on the anchor cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486849.6A CN112900431A (en) | 2020-12-16 | 2020-12-16 | Material-saving high-water-pressure soil layer anchor cable construction method for loess area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486849.6A CN112900431A (en) | 2020-12-16 | 2020-12-16 | Material-saving high-water-pressure soil layer anchor cable construction method for loess area |
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| CN112900431A true CN112900431A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011486849.6A Pending CN112900431A (en) | 2020-12-16 | 2020-12-16 | Material-saving high-water-pressure soil layer anchor cable construction method for loess area |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916297A (en) * | 2006-09-04 | 2007-02-21 | 陈洪凯 | Method for composite skid proof treatment for nail and anchor, and treating structure |
| CN106013191A (en) * | 2016-07-11 | 2016-10-12 | 杭州江润科技有限公司 | Environmental-friendly grass concrete highway slope protection structure and construction method thereof |
| CN108442391A (en) * | 2018-05-03 | 2018-08-24 | 大连理工大学 | A kind of assembling frame beam cable bolting structure and its construction method |
| CN111910630A (en) * | 2020-07-27 | 2020-11-10 | 中国建筑第二工程局有限公司 | Anchor cable structure and anchor cable frame beam construction method |
| CN111926835A (en) * | 2020-09-21 | 2020-11-13 | 信息产业部电子综合勘察研究院 | Flexible surface layer supporting structure system for loess area and construction method thereof |
| CN111997066A (en) * | 2020-08-17 | 2020-11-27 | 北京铁科特种工程技术有限公司 | Manufacturing and construction method of assembled prestressed anchor cable frame beam for slope reinforcement |
-
2020
- 2020-12-16 CN CN202011486849.6A patent/CN112900431A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916297A (en) * | 2006-09-04 | 2007-02-21 | 陈洪凯 | Method for composite skid proof treatment for nail and anchor, and treating structure |
| CN106013191A (en) * | 2016-07-11 | 2016-10-12 | 杭州江润科技有限公司 | Environmental-friendly grass concrete highway slope protection structure and construction method thereof |
| CN108442391A (en) * | 2018-05-03 | 2018-08-24 | 大连理工大学 | A kind of assembling frame beam cable bolting structure and its construction method |
| CN111910630A (en) * | 2020-07-27 | 2020-11-10 | 中国建筑第二工程局有限公司 | Anchor cable structure and anchor cable frame beam construction method |
| CN111997066A (en) * | 2020-08-17 | 2020-11-27 | 北京铁科特种工程技术有限公司 | Manufacturing and construction method of assembled prestressed anchor cable frame beam for slope reinforcement |
| CN111926835A (en) * | 2020-09-21 | 2020-11-13 | 信息产业部电子综合勘察研究院 | Flexible surface layer supporting structure system for loess area and construction method thereof |
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Application publication date: 20210604 |