CN110629756A - Anchor cable removing method - Google Patents
Anchor cable removing method Download PDFInfo
- Publication number
- CN110629756A CN110629756A CN201810640143.7A CN201810640143A CN110629756A CN 110629756 A CN110629756 A CN 110629756A CN 201810640143 A CN201810640143 A CN 201810640143A CN 110629756 A CN110629756 A CN 110629756A
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- sleeve
- anchor cable
- casing
- verticality
- drilling
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to an anchor cable clearing method which is mainly characterized by comprising the steps of carrying out construction preparation, carrying out measurement and placement on the axis position of a continuous wall according to the position requirement of a construction drawing, comparing pile position measurement and placement with an original anchor cable construction drawing to determine the position of each anchor cable, and marking the intersection point of the anchor cable and the axis of the continuous wall; measuring and adjusting the verticality, and measuring and adjusting the drilling verticality of the casing; the casing drilling pore-forming jacketing machine applies downward force to the casing, the casing is rotated to enable the casing to drill downwards, teeth are arranged at the lower end of the casing, and the casing cuts the anchor cable when encountering the anchor cable; taking out soil and the anchor cable from the middle part of the sleeve by adopting a grab bucket; backfilling and pulling out the casing, and backfilling the casing with the originally taken out soil; the jacketing machine is shifted to the point where the next marked anchor line intersects the continuous wall axis. The invention has the advantage of reducing the influence on one end of the anchor cable close to the original building when the anchor cable is removed.
Description
Technical Field
The invention relates to the field of anchor cable clearing, in particular to an anchor cable clearing method.
Background
With the continuous development of urban construction in China, deep foundation pit engineering is continuously increased, the prestressed anchor cable is widely applied to underground foundation pit support in China, and compared with other support technologies, the anchor cable has the advantages of low price, simplicity and maturity in construction, high speed, safety, reliability, no occupation of a main construction working surface and the like, and is one of the main technologies of foundation pit support in China at present. However, as a temporary support measure, the anchor cable cannot be recovered after the support function is invalid, and the anchor cable and the built structure are permanently buried underground and cannot be taken out, so that underground garbage is formed, and underground environment pollution is caused. The method has serious influence on pile foundation construction, foundation pit excavation, surrounding municipal construction, long-term urban planning, sustainable development and the like of adjacent plots.
When adjacent plots are constructed, continuous wall supporting is generally included in the design, the supporting position of the continuous wall is usually located at the edge of the plot, so that the supporting position of the continuous wall can be overlapped with the position of an original anchor cable, the anchor cable at the position of the continuous wall must be removed in the continuous wall construction, the end, close to the original building, of the anchor cable cannot be disturbed in the removing process, and the method of impacting the anchor cable through a heavy hammer in the prior art vibrates the end, close to the original building, of the anchor cable, so that the influence is large.
Disclosure of Invention
The invention aims to provide an anchor cable removing method which can reduce the influence on one end of an anchor cable close to an original building when the anchor cable is removed.
The technical purpose of the invention is realized by the following technical scheme:
an anchor cable removing method is used for removing anchor cables at the position of a continuous wall and comprises the following steps of a, construction preparation, namely measuring and placing the axis position of the continuous wall according to the position requirement of a construction drawing, b, pile position measuring and paying off, namely comparing with an original anchor cable construction drawing to determine the position of each anchor cable and mark the intersection point of the anchor cable and the axis of the continuous wall, c, positioning a jacketing machine: the jacketing machine is shifted to the intersection point of the marked anchor cable and the axis of the continuous wall, a vertical sleeve is installed on the jacketing machine, and the center of the sleeve is superposed with the intersection point of the marked anchor cable and the axis of the continuous wall; d. Measuring and adjusting the verticality: measuring and adjusting the drilling verticality of the casing; e. Drilling a sleeve to form a hole: the casing machine applies downward force to the casing, the casing is rotated to enable the casing to drill downwards, teeth are arranged at the lower end of the casing in the casing drilling process, and the casing cuts the anchor cable when encountering the anchor cable; f. Taking soil and anchor cables by a grab: taking out soil and an anchor cable from the middle part of the sleeve by adopting a grab bucket; g. backfilling and extracting a sleeve: backfilling the originally taken out soil into the sleeve, and synchronously removing and backfilling the sleeve; h. shifting a jacketing machine: and shifting the jacketing machine to the intersection point of the next marked anchor cable and the axis of the continuous wall, and repeating the steps d-g until all the anchor cables are removed.
By adopting the technical scheme, when the device is used, a worker firstly carries out construction preparation to measure and release the axis position of the continuous wall on the ground, then finds out the position of the anchor cable through drilling, determines the positions of all the anchor cables according to the construction drawing of the original anchor cable, marks the intersection point of the anchor cable and the axis of the continuous wall, and carries out drilling by the superposition of a jacketing machine and a marking point, wherein the end part of the sleeve is arranged in a tooth shape in the drilling process, so that when the sleeve is drilled to the position of the anchor cable, the end part of the sleeve cuts the anchor cable, and the anchor cable is disconnected; and then taking out the anchor cable of the soil in the sleeve, finally backfilling and extracting the sleeve, wherein the extracting and the backfilling are carried out synchronously, so that the anchor cable is small in vibration during cutting, and the backfill and the extraction of the sleeve are synchronous, and the movement of the position of the anchor cable can be reduced, thereby achieving the effect of reducing the influence on one end of the anchor cable close to the original building.
The invention is further configured to: the step of checking the straightness of the sleeve is included in the positioning of the sleeve machine, and the deviation of the straightness of the sleeve is less than 10 mm.
By adopting the technical scheme, the straightness deviation of the sleeve is less than 10mm, so that the sleeve is kept vertical in the drilling process, and the drilling bending of the sleeve is prevented, and the drilling direction deviates from the anchor cable.
The invention is further configured to: and the straightness checking step comprises the steps of measuring two parallel straight lines on the ground, placing the sleeve between the two straight lines, and measuring the distance of the sleeve deviating from the straight lines by using a ruler.
By adopting the technical scheme, the two parallel straight lines are drawn on the ground, the sleeve is placed between the two parallel straight lines, the ruler is more convenient to measure the deviation of the sleeve, and the method is simple.
The invention is further configured to: measuring and adjusting the verticality comprises monitoring the verticality of the pile in the drilling process; the perpendicularity monitoring step of the pile in the drilling process is to select two mutually perpendicular directions on the ground and monitor the perpendicularity of the sleeve of the part above the ground by adopting a theodolite or a plumb bob, find that deviation is corrected at any time, and the detection process is always kept in the drilling process of each pile.
Through adopting above-mentioned technical scheme, the straightness that hangs down of stake carries out the casing pipe straightness that hangs down through two mutually perpendicular's theodolites in the drilling process and detects to the testing process is all the time of drilling process, thereby real time monitoring sheathed tube straightness that hangs down prevents the casing pipe slope.
The invention is further configured to: measuring and adjusting the verticality further comprises correcting the verticality of the hole; and in the hole verticality deviation correcting step, deviation occurs when the verticality deviation occurs below 5m of the soil entering in the drilling process, sand or clay can be filled into the sleeve, the sleeve is pulled up while the soil is filled until the sleeve is lifted to the height qualified in the last inspection, the sleeve is straightened, and the drill hole is pressed again after the verticality deviation is inspected to be qualified.
By adopting the technical scheme, the verticality of the hole is rectified, and when the hole is deviated, the sleeve is drilled in the vertical direction again by lifting the sleeve upwards, so that the deviation of the corrected sleeve can be found in time, and unnecessary construction is avoided.
The invention is further configured to: when the sleeve end part cuts the anchor cable in the drilling and forming process of the sleeve, the drilling speed of the sleeve is less than 5 mm/min, and the pressure of the sleeve end part is less than 200 Kg/square centimeter.
By adopting the technical scheme, in the step of drilling the sleeve, when the end of the sleeve is contacted with the anchor cable, the end of the sleeve cuts the anchor cable, but the stress of the sleeve is smaller by controlling the drilling speed of the sleeve and the pressure of the end of the sleeve, so that the end of the sleeve is prevented from bursting apart by the anchor cable.
The invention is further configured to: and (3) stopping removing when the end part of the sleeve in the sleeve is backfilled and pulled out to 3 m above the ground, and removing the rest sleeve after backfilling is finished.
By adopting the technical scheme, when the position close to the ground is backfilled, the sleeve is pulled out after the backfilling is finished, and the phenomenon that the sleeve is directly pulled out due to the fact that the backfilling is not real and the soil structure around the sleeve is changed is prevented.
The invention is further configured to: and drilling holes at intervals at the intersection points of the marked anchor cables and the axis of the continuous wall by the jacketing machine during the shifting of the jacketing machine.
By adopting the technical scheme, the marked anchor cable and the axis intersection point of the continuous wall are drilled at intervals, so that the drilling positions of two adjacent marks are spaced for a period of time, and the soil structure is stable.
The invention is further configured to: the diameter of the sleeve is 1000 mm.
By adopting the technical scheme, the diameter of the sleeve is firstly 1000mm of steel pipe, the space of the sleeve is large, soil can be conveniently taken in the sleeve, and the cutting length of the anchor cable is proper.
In conclusion, the invention has the following beneficial effects:
1. the anchor cable is cut by the rotation of the sleeve, and the sleeve is taken out and backfilled synchronously, so that the influence of the cleaning process of the anchor cable on one end of the anchor cable close to the original building is small, and the strength of the original building structure is protected;
2. when the jacketing machine is shifted, the marked position points are drilled at intervals, so that the soil texture of the jacketing machine adapts to the backfilled soil, and the stability of the structure can be kept during the next drilling.
Drawings
FIG. 1 is a schematic illustration of a cable bolt removal method;
FIG. 2 is a schematic illustration of the jacketing machine seating step;
FIG. 3 is a schematic illustration of a drilling with casing step;
FIG. 4 is a schematic illustration of the grapple taking soil and anchor line steps;
FIG. 5 is a schematic illustration of the backfilling and extracting step.
In the figure, 1, a jacketing machine; 2. a sleeve; 3. a grab bucket; 4. and (5) anchor cables.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in fig. 1, and the terms "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
An anchor cable removing method, referring to figure 1, comprises construction preparation, pile position measurement and paying off, jacketing machine positioning, measurement and adjustment of verticality, casing drilling and hole forming, grab bucket soil taking and anchor cable taking, backfilling, casing pulling out and jacketing machine displacement.
And the construction preparation comprises the step of measuring and placing the axis position of the continuous wall according to the position requirement of the construction drawing.
Referring to fig. 2, the pile position in the pile position measuring and setting-out process is a punching position, the center of the hole position is located on the axis of the continuous wall, the hole is drilled downwards, if the drilling depth reaches the design depth of the original anchor cable 4 in the drilling process, the anchor cable 4 is not found, the position of the drilled hole is readjusted until the position of the anchor cable 4 is found successfully, then after the position of the anchor cable 4 is determined, the position of each anchor cable 4 is determined by comparing with the construction drawing of the original anchor cable 4, the pile position is located at the intersection point of the anchor cable 4 and the axis of the continuous wall, and marking.
Referring to fig. 2, in the casing machine seating step, before the casing 2 is used, the casing 2 is inspected, the casing 2 is made of steel having a diameter of 1000mm, the bottom of the casing 2 is made toothed, and the casing 2 is inspected for straightness, and the casing 2 is straightened if the straightness is not good. The deviation of the detection straightness is less than 10 mm. During detection, two parallel straight lines are measured and released on the ground, the sleeve 2 is placed between the two straight lines, and the distance of the sleeve 2 deviating from the straight lines is measured by a ruler. The jacketing machine 1 is horizontally placed on the ground, the sleeve 2 is clamped on the jacketing machine 1, the sleeve 2 is vertically arranged, and the center of the sleeve 2 coincides with the mark of the pile position.
When the verticality is measured and adjusted, the verticality standard of the sleeve 2 is 3 per thousand, and the verticality of the drilled hole of the sleeve 2 is used for ensuring that the sleeve 2 correctly cuts the anchor cable 4. Measuring and adjusting the verticality comprises monitoring the verticality of the pile and correcting the verticality of the hole in the drilling process. In the perpendicularity monitoring step of the pile in the drilling process, two mutually perpendicular directions are selected on the ground, the perpendicularity of the sleeve 2 above the ground is monitored by adopting a theodolite or a plumb bob, the deviation is found to be corrected at any time, and the detection process is always kept in the drilling process of each pile; in the hole perpendicularity deviation correcting step, if the perpendicularity deviation is too large in the drilling process, deviation correction adjustment must be timely carried out, large deviation occurs below 5m of the embedded soil, sand or clay can be filled into the sleeve 2, the sleeve 2 is pulled up while the soil is filled until the sleeve 2 is lifted to a place qualified in the last inspection, then the sleeve 2 is straightened, and the drill hole is pressed again after the perpendicularity is inspected to be qualified.
Referring to fig. 3, in the drilling of a casing, the casing machine 1 grips the casing 2, then rotates 360 degrees, and presses the casing 2 downward, and after one casing 2 is pressed to the ground, a second casing 2 is connected until the length reaches the depth of the borehole. In the process, if the end part of the casing 2 touches the anchor cable 4, the rotary cutting is carried out, the drilling speed is less than 5 mm/min, and the pressure at the end part of the casing 2 is less than 200 Kg/square centimeter. And after drilling to the elevation position of the anchor cable 4, carefully observing each parameter, and after successfully cutting the anchor cable 4, continuously drilling downwards until the anchor cable 4 in the vertical direction is completely broken.
Referring to fig. 4, in the step of taking soil and anchoring cables by the grab bucket, the diameter of the grab bucket 3 is smaller than that of the casing 2, the grab head lifts the grab bucket 3 out of the casing 2 through a crane, the crane puts down the grab bucket 3, the grab bucket 3 is put into the casing 2 under the action of self weight and impacts soil in the casing 2, so that the casing 2 can lift the soil, the anchoring cables 4 and the like in the casing 2.
Referring to fig. 5, the backfilling and casing pipe pulling steps are performed in one step, the original taken-out soil is backfilled into the casing pipe 2, the casing pipe 2 is backfilled from the position of the hole of the casing pipe 2, and the casing pipe 2 is pulled out in a reverse rotation mode while backfilling is performed until the backfilling is performed to the ground. The removal of the casing 2 and the backfilling are carried out synchronously so as to ensure that the hole is filled with soil and the backfilling is compact. The removal of the casing 2 is suspended when the casing approaches the ground, and the rest of the casing 2 is removed after the backfilling is finished.
And (3) a step of shifting the jacketing machine, namely after the jacketing machine 1 completes drilling of one pile hole, moving the jacketing machine 1 to the next marking position needing drilling, but in order to reduce the influence of drilling on the original building, the jacketing machine 1 needs to drill holes at intervals when cutting the anchor cable 4, and two adjacent drilling marks do not need to drill holes continuously.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. An anchor cable removing method is used for removing anchor cables at a continuous wall position, and is characterized in that: comprises that
a. Construction preparation, namely measuring and placing the axis position of the continuous wall according to the position requirement of a construction drawing;
b. pile position measurement and setting-out, namely comparing the pile position measurement and setting-out with an original anchor cable construction drawing to determine the position of each anchor cable and marking the intersection point of the anchor cable and the axis of the continuous wall;
c. the jacketing machine is in place: the jacketing machine is shifted to the intersection point of the marked anchor cable and the axis of the continuous wall, a vertical sleeve is installed on the jacketing machine, and the center of the sleeve is superposed with the intersection point of the marked anchor cable and the axis of the continuous wall;
d. measuring and adjusting the verticality: measuring and adjusting the drilling verticality of the casing;
e. drilling a sleeve to form a hole: the casing machine applies downward force to the casing, the casing is rotated to enable the casing to drill downwards, teeth are arranged at the lower end of the casing in the casing drilling process, and the casing cuts the anchor cable when encountering the anchor cable;
f. taking soil and anchor cables by a grab: taking out soil and an anchor cable from the middle part of the sleeve by adopting a grab bucket;
g. backfilling and extracting a sleeve: backfilling the originally taken out soil into the sleeve, and synchronously removing and backfilling the sleeve;
h. shifting a jacketing machine: and shifting the jacketing machine to the intersection point of the next marked anchor cable and the axis of the continuous wall, and repeating the steps d-g until all the anchor cables are removed.
2. The cable bolt removal method of claim 1, wherein: the step of checking the straightness of the sleeve is included in the positioning of the sleeve machine, and the deviation of the straightness of the sleeve is less than 10 mm.
3. The cable bolt removal method of claim 2, wherein: and the straightness checking step comprises the steps of measuring two parallel straight lines on the ground, placing the sleeve between the two straight lines, and measuring the distance of the sleeve deviating from the straight lines by using a ruler.
4. The cable bolt removal method of claim 1, wherein: measuring and adjusting the verticality comprises monitoring the verticality of the pile in the drilling process; the perpendicularity monitoring step of the pile in the drilling process is to select two mutually perpendicular directions on the ground and monitor the perpendicularity of the sleeve of the part above the ground by adopting a theodolite or a plumb bob, find that deviation is corrected at any time, and the detection process is always kept in the drilling process of each pile.
5. The cable bolt removal method of claim 4, wherein: measuring and adjusting the verticality further comprises correcting the verticality of the hole; and in the hole verticality deviation correcting step, deviation occurs when the verticality deviation occurs below 5m of the soil entering in the drilling process, sand or clay can be filled into the sleeve, the sleeve is pulled up while the soil is filled until the sleeve is lifted to the height qualified in the last inspection, the sleeve is straightened, and the drill hole is pressed again after the verticality deviation is inspected to be qualified.
6. The cable bolt removal method of claim 1, wherein: when the sleeve end part cuts the anchor cable in the drilling and forming process of the sleeve, the drilling speed of the sleeve is less than 5 mm/min, and the pressure of the sleeve end part is less than 200 Kg/square centimeter.
7. The cable bolt removal method of claim 1, wherein: and (3) stopping removing when the end part of the sleeve in the sleeve is backfilled and pulled out to 3 m above the ground, and removing the rest sleeve after backfilling is finished.
8. The cable bolt removal method of claim 1, wherein: and drilling holes at intervals at the intersection points of the marked anchor cables and the axis of the continuous wall by the jacketing machine during the shifting of the jacketing machine.
9. A method of removing a cable bolt according to any one of claims 1 to 8, wherein: the diameter of the sleeve is 1000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640143.7A CN110629756A (en) | 2018-06-21 | 2018-06-21 | Anchor cable removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640143.7A CN110629756A (en) | 2018-06-21 | 2018-06-21 | Anchor cable removing method |
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| Publication Number | Publication Date |
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| CN110629756A true CN110629756A (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810640143.7A Pending CN110629756A (en) | 2018-06-21 | 2018-06-21 | Anchor cable removing method |
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| CN (1) | CN110629756A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513014A (en) * | 2021-04-26 | 2021-10-19 | 中铁四局集团有限公司 | Anchor cable treatment and stratum reinforcement integrated method adopting triaxial mixing pile machine |
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Application publication date: 20191231 |
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