CN110593590A - In-situ protection method for existing high-voltage line pole in deep foundation pit excavation area - Google Patents
In-situ protection method for existing high-voltage line pole in deep foundation pit excavation area Download PDFInfo
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- CN110593590A CN110593590A CN201910754817.0A CN201910754817A CN110593590A CN 110593590 A CN110593590 A CN 110593590A CN 201910754817 A CN201910754817 A CN 201910754817A CN 110593590 A CN110593590 A CN 110593590A
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- voltage line
- steel bar
- foundation pit
- deep foundation
- bar bundle
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/30—Safety or protective measures preventing damage to building parts or finishing work during construction against mechanical damage or dirt, e.g. guard covers of stairs
Abstract
The invention belongs to the technical field of municipal engineering, and particularly relates to an in-situ reinforcement and protection method for an existing high-voltage line pole in a deep foundation pit excavation area, which comprises the following steps: step 1, pile positions are measured; step 2, drilling a fixing hole; step 3, manufacturing a steel bar bundle; step 4, mounting the reinforcing steel bar bundles; and step 5, grouting: step 5.1, mixing cement paste: the water-cement ratio of the cement paste is 0.8: 1-1: 1, and the cement paste is mixed by a cement paste mixer; step 5.2, adopting a phi 2.5 polyethylene plastic pipe as a grouting pipe, penetrating the grouting pipe to a position 50-80 cm away from the bottom of the fixing hole along the middle part of the steel bar bundle, firmly fixing the grouting pipe on the steel bar bundle by using an iron wire, continuously pouring grout from bottom to top until the grouting pipe is full, pulling out the grouting pipe, and finishing the anchor bar pile; and 6, integrally welding, namely, integrally welding the exposed part of the anchor bar bundle into a whole in an annular shape. The protection method can ensure the normal operation of the existing high-voltage line pole and the electric shock prevention safety of constructors in the construction period, and enables the high-voltage line pole to be firmer.
Description
Technical Field
The invention belongs to the technical field of municipal engineering, and relates to an in-situ reinforcement and protection method for an existing high-voltage line pole in a deep foundation pit excavation area.
Background
The protection of high-voltage line poles around the deep foundation pit is mostly solved by adopting a changing mode, if the changing mode is difficult, the modes of steel sheet piles, jet grouting piles and the like are mostly adopted to carry out enclosure reinforcement on the excavation edge of the foundation pit so as to ensure the safety of the line poles around the foundation pit. In order to ensure the safety of enclosure construction, the construction of large equipment such as steel sheet piles, jet grouting piles and the like has special requirements on the level of a high-voltage line, clearance safety distance and the like, and the construction has more limited conditions and great potential safety hazard.
The existing high-voltage line pole in the deep foundation pit excavation area needs to be solved by adopting a relocation method, but the line relocation construction of the power department often has the characteristics of complex procedures, low efficiency, long implementation period and the like, and the requirements on the construction progress of the deep foundation pit are difficult to meet. Before the high-voltage line pole in the deep foundation pit excavation area scope has not been changed and is accomplished, how to guarantee not influencing deep foundation pit construction progress in, can also ensure existing high-voltage line's normal operating and constructor's protection against electric shock safety, is the technical problem that the skilled person needs a urgent need to solve.
The Chinese patent application numbers are: the patent of CN201510430135.6 discloses a method for reinforcing and protecting a foundation of a utility pole adjacent to a deep foundation pit, which comprises the following steps: s1: driving a high-pressure jet grouting pile into one side of the telegraph pole close to the foundation pit along the direction of the underground wall; s2: inserting a plurality of channel steels into the high-pressure jet grouting pile; s3: a plurality of channel steel is driven into the two sides of the telegraph pole in a direction perpendicular to the underground wall, and the channel steel with three sides forms a surround on three sides of the telegraph pole; s4: and arranging a steel purlin along the outer side of the channel steel, and welding the steel purlin and the steel channel into a whole. The method for foundation reinforcement of the telegraph pole by the high-pressure jet grouting pile and the channel steel ensures the safety of the telegraph pole and constructors in the excavation process of the foundation pit, and does not need a long process for transferring the telegraph pole by an electric power department, thereby accelerating the construction progress, saving the cost, having high flexibility, being suitable for various construction conditions, but not being directly suitable for protection of the existing high-pressure line pole in the excavation area of the deep foundation pit.
Disclosure of Invention
The invention aims to provide an in-situ reinforcement and protection method for an existing high-voltage line pole in a deep foundation pit excavation area, so that the normal operation of the existing high-voltage line pole and the electric shock prevention safety of construction personnel in a construction period are ensured, and the high-voltage line pole is firmer.
The in-situ reinforcement and protection method for the existing high-voltage line pole in the deep foundation pit excavation area comprises the following steps:
step 1, pile position determination: paying off the line pole to be reinforced with the radius of 1.5m as the circle center, determining the range of the enclosure anchor bar pile, and marking the pile positions one by one on the circular line according to the distance of 30 cm;
step 2, drilling a fixing hole: digging soil at the pile position marked in the step 1 by using a Luoyang shovel to form a fixed hole, wherein the depth of the fixed hole is increased by 5m on the basis of the depth of the foundation pit to be excavated, and the aperture of the fixed hole is 15 cm;
step 3, manufacturing the steel bar bundles: cutting a phi 25 steel bar into supporting ribs with the length of 4.5m at each section, cutting a phi 16 steel bar into reinforcing ribs with the length of 0.1m at each section, arranging the supporting ribs in a delta shape with 3 supporting ribs, spacing every two reinforcing ribs by 0.1m, welding and fixing the reinforcing ribs by 3 reinforcing ribs, and welding the reinforcing ribs at the spacing distance of 1.5m to form a whole; the positioning ribs are made into a shape like a Chinese character ji by adopting phi 10 steel bars with the length of 40cm, are welded on the outer sides of the supporting ribs, are arranged in groups of every 2m, and each group comprises 3 positioning ribs, so that the anchoring ribs are not directly contacted with the hole wall after being bound into the holes, and a protective layer is reserved;
step 4, mounting the reinforcing steel bar: hoisting the single-section steel bar bundle to the position above the fixing hole, vertically hoisting the steel bar bundle to the position in the fixing hole, lowering the steel bar bundle at a constant speed, and keeping the top of the steel bar bundle at 0.5m outside the fixing hole;
hoisting the next section of the reinforcing steel bar bundle to the position above the fixing hole, vertically arranging the reinforcing steel bar bundle, welding and fixing the reinforcing steel bar bundle and the previous reinforcing steel bar bundle, and lowering the reinforcing steel bar bundle at a constant speed, wherein 0.5m is reserved outside the fixing hole;
repeating the operation, mounting the reinforcing steel bar bundles to the bottoms of the fixing holes, and mounting the reinforcing steel bar bundles in each fixing hole;
and step 5, grouting:
step 5.1, mixing cement paste: the water-cement ratio of the cement paste is 0.8: 1-1: 1, and the cement paste is mixed by a cement paste mixer;
step 5.2, adopting a phi 2.5 polyethylene plastic pipe as a grouting pipe, penetrating the grouting pipe to a position 50-80 cm away from the bottom of the fixing hole along the middle part of the steel bar bundle, firmly fixing the grouting pipe on the steel bar bundle by using an iron wire, continuously pouring grout from bottom to top until the grouting pipe is full, pulling out the grouting pipe, and finishing the anchor bar pile;
and 6, integrally welding, wherein the exposed part of the anchor bar bundle is integrally annular, phi 16 steel bars are adopted to surround and weld one by one along the periphery of the exposed anchor bar bundle, the phi 16 steel bars are cut out to manufacture tie bars, and opposite anchor bar bundles are welded and fixed in a split-pulling manner to form an integral body.
Further, all the steps are organized and implemented within a safe distance range under the high-voltage line, and the specific construction safe distance is as follows: the safe distance of the high-voltage line below 1kV is 4 meters; the safe distance of the 1-10kV high-voltage line is 6 meters; the safe distance of the 35-110kV high-voltage line is 8 meters; the safe distance of the 154-220kV high-voltage line is 10 meters; the safe distance of the 350-500kV high-voltage line is 15 meters.
Further, in step 3, the positioning steel bars adopt a semicircular structure.
Further, in step 5.2, the grout tube is held 0.5m below the grout surface.
Further, in step 6, the high-voltage wire rods and the peripheral tendons are welded and fixed one by using phi 16 steel bars.
Further, step 6 includes the following steps:
a wire rod steel sleeve is fixedly arranged on the high-voltage wire rod;
and C-shaped steel is welded on the wire rod steel sleeve and the anchor bar bundle which is annular as a whole.
Further, step 6 includes the following steps:
a hoop is arranged at 2/3 of the height of the high-voltage line pole body, 3-5 pull rings are welded on the hoop, and the pull rings are fixed on the outer wall of the hoop in a central symmetry manner;
selecting an anchoring point on the ground in the direction opposite to the pull ring, and mounting a ground anchor on the anchoring point, wherein the anchoring point is outside the excavation area of the deep foundation pit, and the height of the anchoring point is lower than that of the hoop;
and connecting the pull ring and the ground anchor in the direction opposite to the pull ring by using a steel wire rope, and tensioning the steel wire rope.
Further, the step 1 also comprises the step of measuring the verticality of the high-voltage line rod, if the verticality is larger than 10/300mm, the high-voltage line rod is firstly aligned until the verticality is not larger than 10/300mm, and then the construction of drilling a fixing hole is carried out.
Further, step 1 also includes the following steps:
rolling a circular ring area which takes a wire pole to be reinforced as a circle center and has a radius of 60 cm;
drilling a cast-in-place pile hole in the annular area, wherein the aperture of the cast-in-place pile hole is 6-8cm, and the depth of the cast-in-place pile hole is 100 cm;
pouring concrete into the cast-in-place pile hole, wherein the concrete comprises 1 part of water, 1 part of cement and 1 part of sand, and the particle size of the sand is 1.0-2.0 cm;
and when the concrete in the cast-in-place pile hole is not completely solidified, pouring concrete into the circular ring area to enable the poured concrete to surround the periphery of the wire pole to be reinforced, and building the poured concrete into an inverted funnel shape till the poured concrete is solidified.
The invention has the beneficial effects that:
1. according to the in-situ reinforcement and protection method for the existing high-voltage wire rods in the deep foundation pit excavation area, the steel bar bundles are arranged around the wire rods to be reinforced and are subjected to grouting reinforcement, so that the operation safety of a power line in the bridge foundation construction and the deep foundation pit excavation construction process is ensured.
2. The in-situ reinforcement and protection method for the existing high-voltage line pole in the deep foundation pit excavation area can effectively provide in-situ protection for the existing high-voltage line pole in the deep foundation pit excavation area, and is simple in process, economical, applicable, safe and reliable.
3. According to the in-situ reinforcement and protection method for the existing high-voltage line pole in the deep foundation pit excavation area, the high-voltage line pole is firmer through the construction steps of drilling a cast-in-place pile hole in the circular ring area, grouting and pouring concrete into the circular ring area.
Drawings
Fig. 1 is a schematic structural diagram of a reinforcement bundle in the method for in-situ reinforcement and protection of an existing high-voltage line pole in an excavation area of a deep foundation pit;
fig. 2 is a sectional view of a reinforcement bundle in the method for in-situ reinforcement and protection of an existing high-voltage line pole in an excavation area of a deep foundation pit.
In the figure: 1-reinforcing bar bundle, 11-supporting bar, 12-reinforcing bar and 13-positioning bar.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, it being understood that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.
Examples
The in-situ reinforcement and protection method for the existing high-voltage line pole in the deep foundation pit excavation area comprises the following steps:
step 1, pile position determination: paying off the line pole to be reinforced with the radius of 1.5m as the circle center, determining the range of the enclosure anchor bar pile, and marking the pile positions one by one on the circular line according to the distance of 30 cm;
step 2, drilling a fixing hole: digging soil at the pile position marked in the step 1 by using a Luoyang shovel to form a fixed hole, wherein the depth of the fixed hole is increased by 5m on the basis of the depth of the foundation pit to be excavated, and the aperture of the fixed hole is 15 cm;
step 3, manufacturing the reinforcing steel bar bundle 1: as shown in fig. 1 and 2, a phi 25 steel bar is cut into a support rib 11 with a length of 4.5m per section, a phi 16 steel bar is cut into a reinforcing rib 12 with a length of 0.1m per section, the support ribs 11 are arranged in a delta shape with 3 support ribs, every two reinforcing ribs are spaced by 0.1m and welded and fixed by 3 reinforcing ribs 12, and the welding spacing distance of the reinforcing ribs 12 is 1.5m, so that a whole is formed; the positioning ribs 13 are made into a shape like a Chinese character ji by adopting phi 10 steel bars 40cm long, are welded on the outer sides of the support ribs 11, are arranged in groups of every 2m, are 3 in each group, ensure that the anchor ribs are not directly contacted with the hole wall after being tied into the holes, and leave a protective layer;
step 4, installing the reinforcing steel bar bundle 1: hoisting a single-section steel bar bundle 1 above the fixing hole, vertically hoisting the steel bar bundle 1 into the fixing hole, lowering the steel bar bundle at a constant speed, and keeping 0.5m of the top of the steel bar bundle 1 outside the fixing hole;
hoisting the next section of the reinforcing steel bar bundle 1 to the position above the fixing hole, vertically arranging, welding and fixing the next section of the reinforcing steel bar bundle 1 with the previous reinforcing steel bar bundle 1, and lowering the next section of the reinforcing steel bar bundle at a constant speed, wherein 0.5m is reserved outside the fixing hole;
repeating the above operation, installing the tendons 1 to the bottoms of the fixing holes, and installing the tendons 1 in each fixing hole;
and step 5, grouting:
step 5.1, mixing cement paste: the water-cement ratio of the cement paste is 0.8: 1-1: 1, and the cement paste is mixed by a cement paste mixer;
step 5.2, adopting a phi 2.5 polyethylene plastic pipe as a grouting pipe, penetrating the middle of the steel bar bundle 1 to a position 50-80 cm away from the bottom of the fixing hole, firmly fixing the steel bar bundle 1 on the steel bar bundle 1 by using an iron wire, continuously pouring grout from bottom to top until the steel bar bundle is filled, and pulling out the grouting pipe to finish the anchor bar pile;
and 6, integrally welding, wherein the exposed part of the anchor bar bundle is integrally annular, phi 16 steel bars are adopted to surround and weld one by one along the periphery of the exposed anchor bar bundle, the phi 16 steel bars are cut out to manufacture tie bars, and opposite anchor bar bundles are welded and fixed in a split-pulling manner to form an integral body.
All steps of the method are organized and implemented within a safe distance range under the high-voltage line, and the specific construction safe distance is as follows: the safe distance of the high-voltage line below 1kV is 4 meters; the safety distance of the 1-10kV high-voltage line is 6 meters; the safe distance of the 35-110kV high-voltage line is 8 meters; the safe distance of the 154-220kV high-voltage line is 10 meters; the safe distance of the 350-500kV high-voltage line is 15 meters.
In step 3 of this embodiment, the positioning bars are in a semicircular structure. As a modification of step 5.1 in this embodiment, the cement slurry further comprises medium sand of equal mass with ash.
In step 5.2 of this example, the grout tube was held 0.5m below the grout surface.
In step 6 of this embodiment, the high-voltage wire rods and the peripheral tendons are welded and fixed one by using the Φ 16 steel bars.
Step 6 of this embodiment further includes the following steps:
a wire rod steel sleeve is fixedly arranged on the high-voltage wire rod;
and C-shaped steel is welded on the wire rod steel sleeve and the anchor bar bundle which is annular as a whole.
The wire rod steel sleeve is made of a steel plate with the thickness of 2cm through rolling into a C shape, the two C-shaped steel plates are welded to be sleeved on the high-voltage wire rod, and the installation height of the wire rod steel sleeve is higher than the height of the anchor tendon.
Step 6 of this embodiment further includes the following steps:
a hoop is arranged at 2/3 of the height of the high-voltage line pole body, 3-5 pull rings are welded on the hoop, and the pull rings are fixed on the outer wall of the hoop in a central symmetry manner;
selecting an anchoring point on the ground in the direction opposite to the pull ring, and mounting a ground anchor on the anchoring point, wherein the anchoring point is outside the excavation area of the deep foundation pit, and the height of the anchoring point is lower than that of the hoop;
and connecting the pull ring and the ground anchor in the direction opposite to the pull ring by using a steel wire rope, and tensioning the steel wire rope.
In this embodiment, preferably 4 tabs are provided, and the angle between each two adjacent tabs is 90 ° where construction site permits.
In step 1 of this embodiment, the method further includes the step of measuring the perpendicularity of the high-voltage line rod, and if the perpendicularity is greater than 10/300mm, the high-voltage line rod is firstly aligned until the perpendicularity is not greater than 10/300mm, and then the construction of drilling the fixing hole is performed.
Step 1 of this embodiment further includes the following steps:
rolling a circular ring area with the radius of 60cm and taking a wire rod to be reinforced as a circle center, wherein the perpendicularity of the wire rod to be reinforced needs to be ensured in the rolling process;
drilling bored concrete pile holes in the annular area, wherein the diameter of each bored concrete pile hole is 6-8cm, the depth of each bored concrete pile hole is 100cm, the bored concrete pile holes are arrayed in a central array mode by taking the high-voltage line pole as the center, and the bored concrete pile holes are preferably 6 holes;
pouring concrete into the cast-in-place pile hole, wherein the concrete comprises 1 part of water, 1 part of cement and 1 part of sand, and the particle size of the sand is 1.0-2.0 cm;
and when the concrete in the cast-in-place pile hole is not completely solidified, pouring concrete into the circular ring area to enable the poured concrete to surround the periphery of the wire pole to be reinforced, and building the poured concrete into an inverted funnel shape till the poured concrete is solidified.
The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. The in-situ reinforcement and protection method for the existing high-voltage line pole in the deep foundation pit excavation area is characterized by comprising the following steps of:
step 1, pile position determination: paying off the line pole to be reinforced with the radius of 1.5m as the circle center, determining the range of the enclosure anchor bar pile, and marking the pile positions one by one on the circular line according to the distance of 30 cm;
step 2, drilling a fixing hole: digging soil at the pile position marked in the step 1 by using a Luoyang shovel to form a fixed hole, wherein the depth of the fixed hole is increased by 5m on the basis of the depth of the foundation pit to be excavated, and the aperture of the fixed hole is 15 cm;
step 3, manufacturing the steel bar bundles: cutting a phi 25 steel bar into supporting ribs with the length of 4.5m at each section, cutting a phi 16 steel bar into reinforcing ribs with the length of 0.1m at each section, arranging the supporting ribs in a delta shape with 3 supporting ribs, spacing every two reinforcing ribs by 0.1m, welding and fixing the reinforcing ribs by 3 reinforcing ribs, and welding the reinforcing ribs at the spacing distance of 1.5m to form a whole; the positioning ribs are made into a shape like a Chinese character ji by adopting phi 10 steel bars with the length of 40cm, are welded on the outer sides of the supporting ribs, are arranged in groups of every 2m, and each group comprises 3 positioning ribs, so that the anchoring ribs are not directly contacted with the hole wall after being bound into the holes, and a protective layer is reserved;
step 4, mounting the reinforcing steel bar: hoisting the single-section steel bar bundle to the position above the fixing hole, vertically hoisting the steel bar bundle to the position in the fixing hole, lowering the steel bar bundle at a constant speed, and keeping the top of the steel bar bundle at 0.5m outside the fixing hole;
hoisting the next section of the reinforcing steel bar bundle to the position above the fixing hole, vertically arranging the reinforcing steel bar bundle, welding and fixing the reinforcing steel bar bundle and the previous reinforcing steel bar bundle, and lowering the reinforcing steel bar bundle at a constant speed, wherein 0.5m is reserved outside the fixing hole;
repeating the operation, mounting the reinforcing steel bar bundles to the bottoms of the fixing holes, and mounting the reinforcing steel bar bundles in each fixing hole;
and step 5, grouting:
step 5.1, mixing cement paste: the water-cement ratio of the cement paste is 0.8: 1-1: 1, and the cement paste is mixed by a cement paste mixer;
step 5.2, adopting a phi 2.5 polyethylene plastic pipe as a grouting pipe, penetrating the grouting pipe to a position 50-80 cm away from the bottom of the fixing hole along the middle part of the steel bar bundle, firmly fixing the grouting pipe on the steel bar bundle by using an iron wire, continuously pouring grout from bottom to top until the grouting pipe is full, pulling out the grouting pipe, and finishing the anchor bar pile;
and 6, integrally welding, wherein the exposed part of the anchor bar bundle is integrally annular, phi 16 steel bars are adopted to surround and weld one by one along the periphery of the exposed anchor bar bundle, the phi 16 steel bars are cut out to manufacture tie bars, and opposite anchor bar bundles are welded and fixed in a split-pulling manner to form an integral body.
2. The in-situ reinforcement and protection method for the existing high-voltage line pole in the deep foundation pit excavation area according to claim 1, wherein all the steps are organized and implemented within a safety distance range under the high-voltage line, and the specific construction safety distance is as follows: the safe distance of the high-voltage line below 1kV is 4 meters; the safe distance of the 1-10kV high-voltage line is 6 meters; the safe distance of the 35-110kV high-voltage line is 8 meters; the safe distance of the 154-220kV high-voltage line is 10 meters; the safe distance of the 350-500kV high-voltage line is 15 meters.
3. The in-situ reinforcement and protection method for the existing high-voltage line pole in the excavation area of the deep foundation pit according to claim 1, wherein in the step 3, the positioning steel bars are of a semicircular structure.
4. The method for in-situ reinforcement and protection of the existing high-voltage line pole in the excavation area of the deep foundation pit according to claim 1, wherein in the step 5.2, the grouting pipe is kept 0.5m below the surface of cement paste.
5. The in-situ reinforcement and protection method for the existing high-voltage wire rods in the excavation area of the deep foundation pit according to claim 1, wherein in the step 6, the high-voltage wire rods and the peripheral reinforcing steel bundles are welded and fixed one by using phi 16 reinforcing steel bars.
6. The in-situ reinforcement and protection method for the existing high-voltage line pole in the excavation area of the deep foundation pit according to claim 1, wherein the step 6 further comprises the following steps:
a wire rod steel sleeve is fixedly arranged on the high-voltage wire rod;
and C-shaped steel is welded on the wire rod steel sleeve and the anchor bar bundle which is annular as a whole.
7. The in-situ reinforcement and protection method for the existing high-voltage line pole in the excavation area of the deep foundation pit according to claim 1, wherein the step 6 further comprises the following steps:
a hoop is arranged at 2/3 of the height of the high-voltage line pole body, 3-5 pull rings are welded on the hoop, and the pull rings are fixed on the outer wall of the hoop in a central symmetry manner;
selecting an anchoring point on the ground in the direction opposite to the pull ring, and mounting a ground anchor on the anchoring point, wherein the anchoring point is outside the excavation area of the deep foundation pit, and the height of the anchoring point is lower than that of the hoop;
and connecting the pull ring and the ground anchor in the direction opposite to the pull ring by using a steel wire rope, and tensioning the steel wire rope.
8. The in-situ reinforcement and protection method for the existing high-voltage wire rods in the deep foundation pit excavation area as claimed in claim 1, wherein the step 1 further comprises the step of measuring the verticality of the high-voltage wire rods, if the verticality is greater than 10/300mm, the high-voltage wire rods are aligned to the verticality which is not greater than 10/300mm, and then the construction of drilling fixing holes is carried out.
9. The in-situ reinforcement and protection method for the existing high-voltage line pole in the excavation area of the deep foundation pit according to claim 1, wherein the step 1 further comprises the following steps:
rolling a circular ring area which takes a wire pole to be reinforced as a circle center and has a radius of 60 cm;
drilling a cast-in-place pile hole in the annular area, wherein the aperture of the cast-in-place pile hole is 6-8cm, and the depth of the cast-in-place pile hole is 100 cm;
pouring concrete into the cast-in-place pile hole, wherein the concrete comprises 1 part of water, 1 part of cement and 1 part of sand, and the particle size of the sand is 1.0-2.0 cm;
and when the concrete in the cast-in-place pile hole is not completely solidified, pouring concrete into the circular ring area to enable the poured concrete to surround the periphery of the wire pole to be reinforced, and building the poured concrete into an inverted funnel shape till the poured concrete is solidified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910754817.0A CN110593590B (en) | 2019-08-15 | 2019-08-15 | In-situ protection method for existing high-voltage line pole in deep foundation pit excavation area |
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| CN201910754817.0A CN110593590B (en) | 2019-08-15 | 2019-08-15 | In-situ protection method for existing high-voltage line pole in deep foundation pit excavation area |
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| CN105715094A (en) * | 2016-02-16 | 2016-06-29 | 国家电网公司 | Protecting device for high-voltage line pole |
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| CN103195076A (en) * | 2013-03-28 | 2013-07-10 | 中国建筑第八工程局有限公司 | Method for constructing silt deep foundation pit tower crane foundation |
| CN105064428A (en) * | 2015-07-21 | 2015-11-18 | 上海建工七建集团有限公司 | Foundation reinforcement and protection method for telegraph pole near deep foundation pit |
| CN105715094A (en) * | 2016-02-16 | 2016-06-29 | 国家电网公司 | Protecting device for high-voltage line pole |
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