CN111155523A - Underground pile foundation demolition method and device - Google Patents
Underground pile foundation demolition method and device Download PDFInfo
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- CN111155523A CN111155523A CN202010071130.XA CN202010071130A CN111155523A CN 111155523 A CN111155523 A CN 111155523A CN 202010071130 A CN202010071130 A CN 202010071130A CN 111155523 A CN111155523 A CN 111155523A
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- pile
- steel sleeve
- pile foundation
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- 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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- 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
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a method and a device for demolishing an underground pile foundation, which comprises the following steps of suspending a pile hammer through a crawler crane, aligning a steel sleeve with the center of a pile to be demolished, and driving the steel sleeve and the pile to be demolished to form a concentric circle to a design position by using the pile hammer; step two, using the steel sleeve as a retaining wall, adopting high-pressure water to fully liquefy soil between the pile to be dismantled and the steel sleeve, and removing soil between the steel sleeve and the pile foundation to be dismantled by using mud absorption equipment; thirdly, cutting the pile foundation, and hoisting and dismantling the cut pile foundation by utilizing a crawler crane; and step four, hanging a pile driving hammer by using the crawler crane to pull out the steel sleeve, and finishing construction. The invention can partially demolish the underground pile foundation, and the construction occupies less land and does not affect the surrounding buildings.
Description
Technical Field
The invention relates to the field of pile foundation demolition engineering. More particularly, the present invention relates to a method and apparatus for demolishing an underground pile foundation.
Background
Due to insufficient attention and lack of scientific development, a large number of abandoned pile foundations are left in the underground of cities in China at present, and the abandoned pile foundations bring great difficulty to the subsequent development of the cities, particularly to the development of underground spaces.
At present, a pile extractor or a full-slewing drilling machine obstacle removing construction method is adopted for pile foundation demolition. The pile extractor dismantling method is mainly suitable for dismantling the whole pile foundation, and the method has high mechanical cost and low pile extracting efficiency, disturbs the peripheral soil body in the construction process and has influence on the bearing capacity of the peripheral pile foundation; this method is not applicable when the building above or around the pile foundation to be removed is important or when only the part of the pile foundation below the ground is to be removed. Although the obstacle removing method of the full-slewing drilling machine has small disturbance on peripheral soil bodies and can realize partial demolition of pile foundations, the large-scale full slewing drilling machine needs to be installed, a large construction operation surface is needed, the method is suitable for demolishing the land pile foundations, a large-scale supporting platform needs to be arranged for demolishing the pile foundations on water, and construction cost is high.
Disclosure of Invention
The invention aims to provide a construction method and a device for partially dismantling an underground pile foundation without influencing surrounding buildings.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an underground pile foundation demolition method including the steps of:
suspending a pile driving hammer through a crawler crane, aligning a steel sleeve with the center of a pile to be dismantled by using the pile driving hammer, and driving the steel sleeve and the pile to be dismantled to form a concentric circle to a design position;
step two, using the steel sleeve as a retaining wall, adopting high-pressure water to fully liquefy soil between the pile to be dismantled and the steel sleeve, and removing soil between the steel sleeve and the pile foundation to be dismantled by using mud absorption equipment;
thirdly, cutting the pile foundation, and hoisting and dismantling the cut pile foundation by utilizing a crawler crane;
and step four, hanging a pile driving hammer by using the crawler crane to pull out the steel sleeve, and finishing construction.
Preferably, the crawler crane and the steel casing are loaded by the flat barge when the pile foundation in the water area is removed.
Preferably, in the first step,
the diameter of the steel sleeve is set to be not influenced by the normal work of a space between the high-pressure water equipment, the mud suction equipment, the cutting equipment and the hoisting tool which enter the steel sleeve and the pile foundation to be dismantled;
the length of the steel sleeve is set to be that the sinking depth of the steel sleeve exceeds the height of the pile to be dismantled by at least 2m, and the upper end of the steel sleeve is positioned on the ground or the water surface and is higher than the height of the pile to be dismantled.
Preferably, a wire saw is adopted for cutting the pile foundation in the third step.
Preferably, before the cutting is to be dismantled the stake, utilize the crawler crane to transfer wire rope, the pile foundation hasp that will wait to cut is firm and the prelift, and the card is died when preventing the cutting, later starts the rope saw and cuts off and wait to dismantle the stake.
Preferably, the concentric deviation of the distance between the steel sleeve and the pile to be dismantled is not more than 10 cm.
The invention also provides a device for removing the underground pile foundation, which is used for the pile to be removed and comprises:
the steel sleeve is arranged concentrically with the pile to be dismantled, the diameter of the steel sleeve is larger than the pile to be dismantled, the length of the steel sleeve is set to be at least 2m higher than the height of the pile to be dismantled, and the upper end of the steel sleeve is higher than the pile to be dismantled;
the high-pressure water spray head of the high-pressure water equipment can extend into the position between the steel sleeve and the pile to be dismantled;
the mud suction pipe of the mud suction equipment can extend into the space between the steel sleeve and the pile to be dismantled;
and the rope sawing machine is detachably arranged at the upper end of the steel sleeve and is used for cutting the pile to be dismantled.
Preferably, the method further comprises the following steps:
a crawler crane;
and the piling hammer is connected with the crawler crane.
Preferably, the device further comprises a flat barge for loading the crawler crane and the flat barge.
Preferably, the wire saw comprises a power device, a guide wheel, a wire saw and a guide frame;
the power equipment is fixed at the upper end of the steel sleeve, and after the rope saw penetrates into the guide frame, the rope saw sleeve at the bottom of the guide frame extends into a position to be cut through the pile foundation; the guide frame is fixed with the sleeve/pile foundation to be cut.
The invention at least comprises the following beneficial effects:
(1) large-scale construction equipment is not needed, and a large-scale construction platform is not needed for the removal of the pile foundation on the water;
(2) the disturbance to the surrounding soil is small, and the operation safety of surrounding buildings is basically not influenced;
(3) the whole pile foundation does not need to be dismantled, the dismantling amount is reduced to the maximum extent, and the construction cost is reduced;
(4) the required equipment and tools are conventional equipment and are easy to operate in the implementation process.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a construction flow chart of underground pile foundation demolition in example 1;
FIG. 2 is a schematic drawing of the driving of a steel casing of the underground pile foundation of land area in example 1;
fig. 3 is a schematic view of an underground pile foundation demolition apparatus used in demolition of underground pile foundations in land areas in example 1;
FIG. 4 is a schematic view of the lower pile foundation demolition apparatus in connection with the demolition of the underwater underground pile foundation;
fig. 5 is a schematic view of the setup of the wire saw.
Description of reference numerals:
1 pile to be dismantled, 2 steel casings, 3 crawler cranes, 4 pile hammers, 5 wire saws, 51 guide frames, 52 power equipment, 53 guide wheels, 54 wire saws and 6 flat barges.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The invention provides a device for removing an underground pile foundation, which is used for a pile 1 to be removed and comprises:
The high-pressure water spray head of the high-pressure water equipment can extend into the space between the steel sleeve 2 and the pile 1 to be dismantled;
the mud suction pipe of the mud suction equipment can extend into the space between the steel sleeve 2 and the pile 1 to be dismantled;
and the rope sawing machine 5 is detachably arranged at the upper end of the steel sleeve 2 and is used for cutting the pile 1 to be dismantled.
In the technical scheme, the high-pressure water jet of the high-pressure water equipment fully liquefies the soil body between the steel sleeve 2 and the pile 1 to be dismantled to form diluted slurry, then the slurry between the steel sleeve 2 and the pile 1 to be dismantled is removed through the mud sucking equipment, and then the pile foundation is cut off through the rope sawing machine 5.
In a preferred embodiment of the apparatus for removing underground pile foundations of the present application, as shown in fig. 3, the apparatus further includes:
a crawler crane 3;
and the piling hammer 4 is connected with the crawler crane 3 and is used for driving and pulling out the steel sleeve 2.
In the technical scheme, the positioning of the steel sleeve 2 and the hoisting and pulling-out of the steel sleeve 2 are realized through the crawler crane 3 and the pile hammer 4.
In a preferred embodiment of the device for removing the underground pile foundation, as shown in fig. 4, the device further comprises a flat barge 6 for loading the crawler crane 3 and the flat barge 6, and the removal of the pile foundation in the water area is realized by arranging the flat barge 6.
In a preferred embodiment of the apparatus for demolishing an underground pile foundation of the present application, as shown in fig. 5, the wire saw 5 includes a power device 52, a guide wheel 53, a wire saw 54, and a guide frame 51;
the power equipment 52 is fixed at the upper end of the steel casing pipe 2, and after the rope saw 54 penetrates into the guide frame 51, the rope saw 54 at the bottom of the guide frame 51 penetrates through the pile foundation and extends into a position to be cut; the guide frame 51 is fixed with the steel casing pipe/pile foundation to be cut.
Example 1
As shown in fig. 1 to 3, the invention provides an underground pile foundation demolition method, which comprises the following steps:
step one, hanging a pile hammer 4 through a crawler crane 3, aligning a steel sleeve 2 with the center of a pile 1 to be dismantled by utilizing the pile hammer 4, driving the steel sleeve 2 and the pile 1 to be dismantled to form a concentric circle to a design position, keeping the concentric deviation between the steel sleeve 2 and the pile 1 to be dismantled to be no more than 5cm, keeping the sinking depth of the steel sleeve 2 to exceed the dismantling elevation 2m of the pile 1 to be dismantled, keeping the radius of the steel sleeve 2 to be 40cm larger than the radius of the pile 1 to be dismantled
Step two, using the steel sleeve 2 as a retaining wall, adopting high-pressure water equipment to fully liquefy soil between the pile 1 to be dismantled and the steel sleeve 2, and then using mud suction equipment to remove mud between the steel sleeve 2 and the pile 1 foundation to be dismantled, so as to provide space for the rope saw 5, wherein the mud removal depth exceeds the dismantling elevation of the pile 1 to be dismantled;
thirdly, before the pile 1 to be dismantled is cut, a steel wire rope is lowered by using the crawler crane 3, the pile foundation to be cut is locked firmly and pre-lifted, the pile foundation to be cut is prevented from being locked during cutting, then the rope sawing machine 5 is started to cut off the pile 1 to be dismantled, and the cut pile foundation is hoisted and dismantled by using the crawler crane 3;
and step four, hanging a pile hammer 4 by using the crawler crane 3 to pull out the steel sleeve 2, and finishing construction.
The underground pile foundation demolition method and device can solve the following technical problems:
(1) the problem that a large construction platform and special equipment are not needed to be arranged during pile foundation demolition is solved, and the economical efficiency is good.
(2) The disturbance of the demolition of the pile foundation to the surrounding soil is small, and the operation safety problem of surrounding buildings is basically not influenced.
(3) The demolition method of pile foundation among the prior art all need demolish whole pile foundation, and the engineering volume is big, and is with high costs, actually, what influence follow-up new construction normally only is the upper portion structure of the abandonment pile foundation of waiting to demolish, and above-mentioned technical problem has been solved in this application, can only demolish the part upper portion pile foundation that influences newly-built structure, and furthest reduces the pile foundation demolition engineering volume.
(4) The construction method is suitable for all geological conditions and is suitable for pile foundations of any diameter and depth.
The method is implemented by taking a waste pile with the pile diameter of 1.2m and the depth of 40m as an implementation object, and adopting the embodiment 1 to remove the waste pile, remove the waste pile by using a high-pressure water cutting soil body and remove the waste pile and a full-slewing drilling machine to remove the waste pile respectively. The method comprises the following steps that 1, high-pressure water jet grouting piles with the diameter of 1m are uniformly distributed on the waste piles, wherein the high-pressure water jet grouting piles with the diameter of 4 are used for removing the waste piles by cutting soil bodies with high pressure, the disturbance range of the high-pressure water jet grouting piles on the soil around the piles is 8-10 times of the pile diameter, the drilling depth of the high-pressure water jet grouting piles is 1.5m longer than the designed pile length, and one pile is long in removing time; the full-rotation drilling machine at least needs a construction site with the square meter of 300 (not containing a site occupied by a crawler crane), the construction working surface is 10 times of the method, and the work efficiency of the full-rotation drilling machine dismantling method is 10 m/day. In terms of cost, the cost for removing one waste pile by high-pressure water cutting soil body pile pulling is about 1.5 times that of the embodiment 1 of the application, and the cost for removing one waste pile by a full slewing drilling machine is about 2 times that of the embodiment 1 of the application.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (10)
1. The underground pile foundation demolition method is characterized by comprising the following steps:
suspending a pile driving hammer through a crawler crane, aligning a steel sleeve with the center of a pile to be dismantled, and driving the steel sleeve and the pile to be dismantled to form a concentric circle to a design position by using the pile driving hammer;
step two, using the steel sleeve as a retaining wall, adopting high-pressure water to fully liquefy soil between the pile to be dismantled and the steel sleeve, and removing soil between the steel sleeve and the pile foundation to be dismantled by using mud absorption equipment;
thirdly, cutting the pile foundation, and hoisting and dismantling the cut pile foundation by utilizing a crawler crane;
and step four, hanging a pile driving hammer by using the crawler crane to pull out the steel sleeve, and finishing construction.
2. A method of demolishing an underground pile foundation according to claim 1, wherein the crawler crane and the steel casing are loaded by a flat barge while the demolition of the pile foundation in the water area is performed.
3. A method for demolishing an underground pile foundation according to claim 1 or 2, wherein in the first step,
the diameter of the steel sleeve is set to be not influenced by the normal work of a space between the high-pressure water equipment, the mud suction equipment, the cutting equipment and the hoisting tool which enter the steel sleeve and the pile foundation to be dismantled;
the length of the steel sleeve is set to be that the sinking depth of the steel sleeve exceeds the height of the pile to be dismantled by at least 2m, and the upper end of the steel sleeve is positioned on the ground or the water surface and is higher than the height of the pile to be dismantled.
4. A method for demolishing an underground pile foundation according to claim 1 or 2, wherein the pile foundation is cut in the third step using a wire saw.
5. A method of demolishing an underground pile foundation as claimed in claim 4, wherein before cutting the pile to be demolished, the steel wire rope is lowered by the crawler crane to secure and pre-lift the lock catch of the pile foundation to be cut, preventing the pile foundation from being locked during cutting, and then the rope saw is started to cut off the pile to be demolished.
6. A method of demolishing an underground pile foundation according to claim 1, wherein the concentricity of the steel casing to the pile to be demolished is not more than 10 cm.
7. An apparatus for demolishing an underground pile foundation, for a pile to be demolished, comprising:
the steel sleeve is arranged concentrically with the pile to be dismantled, the diameter of the steel sleeve is larger than the pile to be dismantled, the length of the steel sleeve is set to be at least 2m higher than the height of the pile to be dismantled, and the upper end of the steel sleeve is higher than the pile to be dismantled;
the high-pressure water spray head of the high-pressure water equipment can extend into the position between the steel sleeve and the pile to be dismantled;
the mud suction pipe of the mud suction equipment can extend into the space between the steel sleeve and the pile to be dismantled;
and the rope sawing machine is detachably arranged at the upper end of the steel sleeve and is used for cutting the pile to be dismantled.
8. An apparatus for underground pile foundation demolition as recited in claim 7, further comprising:
a crawler crane;
and the piling hammer is connected with the crawler crane.
9. An apparatus for demolishing an underground pile foundation as claimed in claim 8, further comprising a hopper loader for loading the crawler and the hopper loader.
10. An apparatus for demolishing an underground pile foundation according to claim 7, wherein the wire saw includes a power unit, a guide wheel, a wire saw, and a guide frame;
the power equipment is fixed at the upper end of the steel sleeve, and after the rope saw penetrates into the guide frame, the rope saw sleeve at the bottom of the guide frame extends into a position to be cut through the pile foundation; the guide frame is fixed with the steel sleeve/the pile foundation to be cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010071130.XA CN111155523A (en) | 2020-01-21 | 2020-01-21 | Underground pile foundation demolition method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010071130.XA CN111155523A (en) | 2020-01-21 | 2020-01-21 | Underground pile foundation demolition method and device |
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| Publication Number | Publication Date |
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| CN111155523A true CN111155523A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010071130.XA Pending CN111155523A (en) | 2020-01-21 | 2020-01-21 | Underground pile foundation demolition method and device |
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| CN (1) | CN111155523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893999A (en) * | 2020-07-10 | 2020-11-06 | 中国建筑第八工程局有限公司 | Pile pulling guide frame and pile pulling method for waste inclined piles |
-
2020
- 2020-01-21 CN CN202010071130.XA patent/CN111155523A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893999A (en) * | 2020-07-10 | 2020-11-06 | 中国建筑第八工程局有限公司 | Pile pulling guide frame and pile pulling method for waste inclined piles |
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