CN111980015A - Method for pouring concrete in karst cave when mechanical hole-forming pile meets and supporting device - Google Patents
Method for pouring concrete in karst cave when mechanical hole-forming pile meets and supporting device Download PDFInfo
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- CN111980015A CN111980015A CN202010962153.XA CN202010962153A CN111980015A CN 111980015 A CN111980015 A CN 111980015A CN 202010962153 A CN202010962153 A CN 202010962153A CN 111980015 A CN111980015 A CN 111980015A
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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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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Abstract
A method for pouring concrete in solution cavity in a mechanical hole-forming pile is characterized in that a solution cavity opening is plugged through a special supporting device, the supporting device comprises a steel reinforcement cage, an electric hydraulic rod, an arc-shaped protective steel plate and an auxiliary arc-shaped steel protective plate, the arc-shaped protective steel plate is temporarily fixed on the outer side of the steel reinforcement cage, the auxiliary arc-shaped steel protective plate is arranged at the position right opposite to the arc-shaped protective steel plate, and the auxiliary arc-shaped steel protective plate is temporarily fixed on the outer side of the steel reinforcement cage; the electric hydraulic rod is horizontally arranged on the reinforcement cage, one end of the electric hydraulic rod is in contact with the arc-shaped protection steel plate, and the other end of the electric hydraulic rod is in contact with the auxiliary arc-shaped steel protection plate. The invention has the beneficial effects that: the arc-shaped protection steel plate is arranged on the outer surface of the reinforcement cage, and the arc-shaped protection steel plate tightly covers the karst cave opening through the electric hydraulic rod, so that when the concrete is poured, the phenomena of slurry leakage and hole collapse are effectively avoided by using the method, and the construction efficiency is effectively improved while the waste of the concrete is avoided.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a method for pouring concrete in a karst cave when a mechanical hole-forming pile meets and a supporting device.
Background
The karst areas in China are widely distributed, many karsts exist in many areas, and the karst caves mainly have the phenomenon that limestone is gradually eroded under the action of water, acidic substances, microorganisms and the like to form cavities, so that the karst caves are basically arranged in places with the limestone. The pile foundation construction in the karst area is always a difficult problem which puzzles the engineering world, and particularly, under the condition that the bearing capacity of a single pile is large, the phenomena of slurry leakage and hole collapse are frequently generated, and sometimes even large-area ground subsidence is generated, so that the safety of constructors and mechanical equipment is endangered, the construction difficulty is very high, and the construction progress of the hole pile is influenced.
Currently, in view of this situation, a general processing method includes:
(1) the karst cave is not processed, concrete is directly poured, and when the concrete is poured in the mode, on one hand, great potential safety hazards exist, and on the other hand, the size and the volume of the karst cave cannot be predicted, so that a great amount of concrete waste can be caused when the concrete is poured.
(2) Pouring concrete into karst cave
There are many different construction methods for concrete placement in a cavern. For example, the concrete is directly poured into the karst cave or the concrete is poured after the filler is arranged in the karst cave, and the general principle is to fill the karst cave with the filler. For example, the invention patent with publication number CN111549775A discloses a hole pile construction method under karst geological conditions, which is characterized in that in the process of excavating rock soil on the ground to form pile holes, when the pile holes are intersected with an underground karst cave, a retaining wall template is prepared, the underground karst cave openings intersected with the pile holes are sealed by the retaining wall template, then one side of the retaining wall template, which is close to the underground karst cave, is filled with fillers, the fillers comprise concrete, cofferdams are formed after the concrete is solidified, and then the rock soil is excavated continuously to form the pile holes.
Although the construction method for pouring concrete in the karst cave avoids the phenomena of slurry leakage and hole collapse, the technical scheme has a great deal of concrete waste.
Disclosure of Invention
The invention provides a method for pouring concrete in a karst cave when a mechanical hole-forming pile meets the technical problems in the prior art and a supporting device.
The method for pouring concrete in karst cave when mechanical hole-forming pile meets comprises the following steps:
the method comprises the following steps: positioning and paying off the hole piles according to the plan;
step two: placing the rotary excavator in place, performing pore-forming construction, removing slag at the bottom of a hole after the construction is finished, and measuring the depth of the hole;
step three: determining the elevation of the karst cave mouth position and the size of the karst cave mouth according to the hole pile confirmation of the formed hole;
step four: manufacturing supporting device
The supporting device comprises a steel reinforcement cage, an electric hydraulic rod, an arc-shaped protective steel plate and an auxiliary arc-shaped steel protective plate;
processing and customizing an arc-shaped protective steel guard plate according to the diameter of the hole pile and the size of the karst cave opening, wherein the size of the arc-shaped protective steel guard plate is larger than that of the karst cave opening;
temporarily fixing the arc-shaped protection steel plate on the outer side of the reinforcement cage, wherein an auxiliary arc-shaped steel protection plate is arranged at a position right opposite to the arc-shaped protection steel plate, and the auxiliary arc-shaped steel protection plate is temporarily fixed on the outer side of the reinforcement cage; the electric hydraulic rod is horizontally arranged on the reinforcement cage, one end of the electric hydraulic rod is in contact with the arc-shaped protective steel plate, and the other end of the electric hydraulic rod is in contact with the auxiliary arc-shaped steel protective plate;
the positions of the arc-shaped protective steel plate and the auxiliary arc-shaped steel guard plate on the reinforcement cage are matched with the elevation of the opening of the molten hole;
step five: laying and supporting device
Placing the supporting device in the hole-formed hole pile, and adjusting the position of the supporting device to ensure that the arc-shaped protective steel plate is matched with the position of the karst cave opening;
step six: the electric hydraulic rod is pressed against the steel guard plates at two ends through a remote control device, so that the arc-shaped protection steel plate completely covers the opening of the molten hole, and a protection layer is reserved for the reinforcement cage;
step seven: and (5) pouring concrete for the hole piles.
Further, the arc-shaped protective steel guard plate covers the hole opening, and each edge of the arc-shaped protective steel guard plate extends by at least 100 mm.
Furthermore, the arc of the arc-shaped protection steel plate is matched with the arc of the steel reinforcement cage.
The invention has the beneficial effects that: the arc-shaped protection steel plate is arranged on the outer surface of the reinforcement cage, and the arc-shaped protection steel plate tightly covers the karst cave opening through the electric hydraulic rod, so that when the concrete is poured, the phenomena of slurry leakage and hole collapse are effectively avoided by using the method, and the construction efficiency is effectively improved while the waste of the concrete is avoided.
Drawings
FIG. 1 is a schematic structural view of a supporting device used in a method for pouring concrete in a karst cave when a mechanical bored pile is encountered;
in the figure: 1. steel reinforcement cage, 2 arc protection steel backplate, 3 electronic hydraulic stem.
Detailed description of the preferred embodiments
For a better understanding of the invention, the contents of the invention are further illustrated below with reference to examples, which are described below by way of illustration with reference to the drawings and are intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The basic idea of the method for pouring the concrete of the mechanical pore-forming pile in the karst cave is as follows: and (4) determining whether a karst cave exists according to the hole pile formed by the hole, and if so, measuring the elevation and the size of the position of the karst cave opening. According to the hole pile diameter and the size processing customization arc protection steel backplate of dissolving the entrance to a cave, the size of arc protection steel backplate should be greater than the size of dissolving the entrance to a cave. Determining the corresponding position of the arc-shaped protection steel guard plate in the steel reinforcement cage according to the elevation of the hole melting opening, then temporarily fixing the arc-shaped protection steel guard plate to the position, fixing an electric hydraulic rod on an additional steel reinforcement cage reinforcing hoop at the corresponding elevation position, hanging an auxiliary arc-shaped steel guard plate not smaller than 200mm multiplied by 200mm at the corresponding position of the steel reinforcement cage at the other end of the hydraulic rod, and putting the auxiliary arc-shaped steel guard plate into the hole pile along with the steel reinforcement cage; adjusting the position of the reinforcement cage to ensure that the steel guard plate is matched with the position of the opening of the cave; the electric hydraulic rod is pressed against the steel guard plates at two ends through a remote control device, so that the arc-shaped steel guard plates can completely cover the opening of the molten hole, and a protective layer is reserved for the reinforcement cage; then concrete pouring work is performed.
The concrete construction process of the method for pouring the concrete in the karst cave of the mechanical pore-forming pile comprises the following steps:
the method comprises the following steps: positioning and paying off the hole piles according to the plan;
step two: placing the rotary excavator in place, performing pore-forming construction, removing slag at the bottom of a hole after the construction is finished, and measuring the depth of the hole;
step three: determining the elevation of the karst cave mouth position and the size of the karst cave mouth according to the hole pile confirmation of the formed hole;
step four: manufacturing supporting device
The supporting device comprises a steel reinforcement cage, an electric hydraulic rod, an arc-shaped protective steel plate and an auxiliary arc-shaped steel protective plate;
processing and customizing an arc-shaped protective steel guard plate according to the diameter of the hole pile and the size of the karst cave opening, wherein the size of the arc-shaped protective steel guard plate is larger than that of the karst cave opening;
temporarily fixing the arc-shaped protection steel plate on the outer side of the reinforcement cage, wherein an auxiliary arc-shaped steel protection plate is arranged at a position right opposite to the arc-shaped protection steel plate, and the auxiliary arc-shaped steel protection plate is temporarily fixed on the outer side of the reinforcement cage; the electric hydraulic rod is horizontally arranged on the reinforcement cage, one end of the electric hydraulic rod is in contact with the arc-shaped protective steel plate, and the other end of the electric hydraulic rod is in contact with the auxiliary arc-shaped steel protective plate;
the positions of the arc-shaped protective steel plate and the auxiliary arc-shaped steel guard plate on the reinforcement cage are matched with the elevation of the opening of the molten hole;
step five: laying and supporting device
Placing the supporting device in the hole-formed hole pile, and adjusting the position of the supporting device to ensure that the arc-shaped protective steel plate is matched with the position of the karst cave opening;
step six: the electric hydraulic rod is pressed against the steel guard plates at two ends through a remote control device, so that the arc-shaped protection steel plate completely covers the opening of the molten hole, and a protection layer is reserved for the reinforcement cage;
step seven: and (5) pouring concrete for the hole piles.
Compared with the prior art, when the technical scheme of the invention is used for pouring the hole piles, concrete pouring is not needed to be carried out on the karst caves, and only the hole piles are poured. In the work progress, through electronic hydraulic stem with arc protection steel sheet top in solution cavity mouth department, avoided the concrete placement in-process leak thick liquid, the production of hole phenomenon of collapsing, effectively avoided the waste of concrete simultaneously.
The above embodiments have been described primarily for the purpose of illustrating the general principles and key features of the invention. The present invention is not limited to the description of the above embodiments, and various additions, modifications, and substitutions are possible within the scope of the appended claims, for example, the structure of the cover plate may be appropriately changed according to the shape of the junction box to which it is applied.
Claims (6)
1. A method for pouring concrete when a mechanical hole-forming pile meets karst caves is characterized in that: the method for pouring the karst cave concrete comprises the following steps:
the method comprises the following steps: positioning and paying off the hole piles according to the plan;
step two: placing the rotary excavator in place, performing pore-forming construction, removing slag at the bottom of a hole after the construction is finished, and measuring the depth of the hole;
step three: determining the elevation of the karst cave mouth position and the size of the karst cave mouth according to the hole pile confirmation of the formed hole;
step four: manufacturing supporting device
The supporting device comprises a steel reinforcement cage, an electric hydraulic rod, an arc-shaped protective steel plate and an auxiliary arc-shaped steel protective plate;
processing and customizing an arc-shaped protective steel guard plate according to the diameter of the hole pile and the size of the karst cave opening, wherein the size of the arc-shaped protective steel guard plate is larger than that of the karst cave opening;
temporarily fixing the arc-shaped protection steel plate on the outer side of the reinforcement cage, wherein an auxiliary arc-shaped steel protection plate is arranged at a position right opposite to the arc-shaped protection steel plate, and the auxiliary arc-shaped steel protection plate is temporarily fixed on the outer side of the reinforcement cage; the electric hydraulic rod is horizontally arranged on the reinforcement cage, one end of the electric hydraulic rod is in contact with the arc-shaped protective steel plate, and the other end of the electric hydraulic rod is in contact with the auxiliary arc-shaped steel protective plate;
the positions of the arc-shaped protective steel plate and the auxiliary arc-shaped steel guard plate on the reinforcement cage are matched with the elevation of the opening of the molten hole;
step five: laying and supporting device
Placing the supporting device in the hole-formed hole pile, and adjusting the position of the supporting device to ensure that the arc-shaped protective steel plate is matched with the position of the karst cave opening;
step six: the electric hydraulic rod is pressed against the steel guard plates at two ends through a remote control device, so that the arc-shaped protection steel plate completely covers the opening of the molten hole, and a protection layer is reserved for the reinforcement cage;
step seven: and (5) pouring concrete for the hole piles.
2. The method for pouring concrete in the karst cave of the mechanical hole-forming pile as claimed in claim 1, wherein: the arc-shaped protective steel guard plate covers the hole-dissolving opening, and each edge of the arc-shaped protective steel guard plate extends by at least 100 mm.
3. The method for pouring concrete in the karst cave of the mechanical hole-forming pile as claimed in claim 1, wherein: the arc of arc protection steel sheet and steel reinforcement cage arc phase-match.
4. The utility model provides a supporting device that mechanical pore-forming pile meets solution cavity concrete and pours which characterized in that:
the supporting device comprises a steel reinforcement cage, an electric hydraulic rod, an arc-shaped protective steel plate and an auxiliary arc-shaped steel protective plate;
temporarily fixing the arc-shaped protection steel plate on the outer side of the reinforcement cage, wherein an auxiliary arc-shaped steel protection plate is arranged at a position right opposite to the arc-shaped protection steel plate, and the auxiliary arc-shaped steel protection plate is temporarily fixed on the outer side of the reinforcement cage; the electric hydraulic rod is horizontally arranged on the reinforcement cage, one end of the electric hydraulic rod is in contact with the arc-shaped protection steel plate, and the other end of the electric hydraulic rod is in contact with the auxiliary arc-shaped steel protection plate.
5. The support device for concrete pouring of the mechanical bored pile in the solution cavity according to claim 4, wherein: arc protection steel backplate according to the hole stake diameter with solution hole mouth size processing customization forms, the size of arc protection steel backplate is greater than the size of solution hole mouth.
6. The support device for concrete pouring of the mechanical bored pile in the solution cavity according to claim 5, wherein: the positions of the arc-shaped protective steel plate and the auxiliary arc-shaped steel protective plate on the reinforcement cage are matched with the elevation of the hole melting opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010962153.XA CN111980015A (en) | 2020-09-14 | 2020-09-14 | Method for pouring concrete in karst cave when mechanical hole-forming pile meets and supporting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010962153.XA CN111980015A (en) | 2020-09-14 | 2020-09-14 | Method for pouring concrete in karst cave when mechanical hole-forming pile meets and supporting device |
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| CN111980015A true CN111980015A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010962153.XA Pending CN111980015A (en) | 2020-09-14 | 2020-09-14 | Method for pouring concrete in karst cave when mechanical hole-forming pile meets and supporting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981958A (en) * | 2021-11-26 | 2022-01-28 | 中铁十六局集团第四工程有限公司 | Method for plugging karst cave of mechanical pore-forming cast-in-place pile |
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2020
- 2020-09-14 CN CN202010962153.XA patent/CN111980015A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981958A (en) * | 2021-11-26 | 2022-01-28 | 中铁十六局集团第四工程有限公司 | Method for plugging karst cave of mechanical pore-forming cast-in-place pile |
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