CN206529769U - Cast-in-situ bored pile underwater concrete pouring steel conduit - Google Patents
Cast-in-situ bored pile underwater concrete pouring steel conduit Download PDFInfo
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- CN206529769U CN206529769U CN201621284155.3U CN201621284155U CN206529769U CN 206529769 U CN206529769 U CN 206529769U CN 201621284155 U CN201621284155 U CN 201621284155U CN 206529769 U CN206529769 U CN 206529769U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 100
- 239000010959 steel Substances 0.000 title claims abstract description 100
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 22
- 230000005484 gravity Effects 0.000 claims description 3
- 239000013049 sediment Substances 0.000 abstract description 11
- 239000004568 cement Substances 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model provides a kind of cast-in-situ bored pile underwater concrete pouring steel conduit, including is arranged on the shoe of the bottom of steel conduit；Shoe includes the arc flap valve that screw thread steel bushing and at least three valves are annularly arranged, wherein, screw thread steel bushing is connected with steel conduit, and seal gasket is provided with the screwed connection of steel conduit and screw thread steel bushing；The bottom of arc flap valve and screw thread steel bushing is hinged, and seal gasket is also equipped between arc flap valve.The utility model can avoid the cement in the first batch of concrete of cast-in-situ bored pile from being flush with water, and reduce the mud at stake bottom and the sediment at stake bottom, so as to improve the bearing capacity and concrete piles quality of cast-in-situ bored pile, extend the service life of building.
Description
Technical Field
The utility model relates to a concrete pouring technical field under water, more specifically relates to a bored concrete pile concrete pouring steel pipe under water, especially to major diameter overlength stake concrete pouring quality under water, ensures that first batch concrete reachs the hole bottom smoothly, eliminates the cement in the concrete and is washed away by water, can effectively reduce the mud at the bottom of the pile and the sediment at the bottom of the pile, provides the bearing capacity at the bottom of the pile, increases the use durability of structure thing.
Background
At present, steel guide pipes used for underwater concrete pouring are widely applied to the field of foundation layers of building engineering, bridge engineering, traffic engineering, water conservancy dams and the like, and under the common condition, the steel guide pipes adopted by the first batch of concrete poured by the underwater concrete are usually realized by rubber floating balls with proper sizes in order to reduce the washing of the cement in the concrete by water and instantaneously lower the water pressure in the guide pipes, the water tightness of the steel guide pipes is limited, and the floating balls can break and lose efficacy in the quick friction process with the steel guide pipes, and are sometimes buried in the concrete or clamped on a steel reinforcement cage, so that the quality of the concrete of a pile body is influenced; in addition, concrete is arranged on water under the floating ball, the floating ball can prevent the concrete from quickly reaching the bottom of the pile by the buoyancy of the water, and the floating ball cannot play a good role in impacting and floating the sediments at the bottom of the pile, so that the bearing capacity of a pile foundation is influenced, and the service life of structures such as bridges is shortened.
Therefore, there is a need to further improve the existing steel conduit, and to prevent the cement in the first concrete of the cast-in-situ bored pile from being washed away by water, so as to effectively reduce the mud at the bottom of the pile and the sediment at the bottom of the pile, thereby improving the bearing capacity and the concrete quality of the pile body of the cast-in-situ bored pile, and prolonging the service life of the building.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing a bored concrete pile concrete steel pipe under water avoids the cement in the first concrete of bored concrete pile to be washed away by the water, reduces the laitance of pile head and the sediment at the bottom of the pile to improve the bearing capacity and the pile body concrete quality of bored concrete pile, prolong the life of building.
The utility model provides an underwater concrete pouring steel conduit for a cast-in-situ bored pile, which comprises a steel conduit and a pipe shoe arranged at the bottom of the steel conduit; the pipe boot comprises a screw thread steel sleeve and at least three arc valves which are annularly arranged, wherein the top of the screw thread steel sleeve is connected with the bottom of the steel guide pipe, and a sealing device is arranged at the connection position of the top of the screw thread steel sleeve and the bottom of the steel guide pipe; the bottom of the screw thread steel sleeve is hinged with the arc-shaped valves, sealing devices are arranged at the hinged positions of the bottom of the screw thread steel sleeve and the arc-shaped valves, and the sealing devices are arranged between the arc-shaped valves.
In addition, the sealing device preferably comprises a sealing rubber gasket and a sealing rubber ring.
In addition, the top of the steel conduit is preferably connected with a concrete funnel, and a funnel control valve is arranged at the connection position between the steel conduit and the concrete funnel.
In addition, the preferred structure is that the arc-shaped valve of the pipe shoe is tightly closed under the action of water pressure and is opened under the action of the gravity of concrete in the concrete funnel.
In addition, the preferred structure is that the arc-shaped valve is 6 valves.
According to the above technical scheme, the utility model provides a bored concrete pile is concrete under water and is filled steel pipe adopts pipe shoe in the bottom installation of ordinary steel pipe, and the pipe shoe opens and shuts freely, simple structure, simple to operate, and is with low costs, and easy operation, especially can guarantee to the concrete of the overlength stake of straightening fill first batch concrete back cover quality.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a schematic view of the working principle of the underwater concrete-poured steel pipe of the cast-in-situ bored pile according to the embodiment of the present invention.
Wherein the reference numerals include: the concrete funnel comprises an arc-shaped valve 1, a threaded steel sleeve 2, a steel guide pipe 3, a concrete funnel 4, a funnel control valve 5 and a sealing rubber gasket 6.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
The invention is described in further detail below with reference to corresponding and specific embodiments.
In the following description, certain exemplary embodiments of the invention are described by way of illustration only, and it will be apparent to those of ordinary skill in the art that the described implementations may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive of the scope of the claims. In addition, in the present specification, the same reference numerals denote the same parts.
For explaining the utility model provides a bored concrete pile is concrete under water and is filled steel pipe, fig. 1 shows according to the utility model discloses a bored concrete pile is concrete under water and is filled steel pipe's theory of operation.
As shown in fig. 1, the utility model provides a bored concrete pile is concrete under water and is poured steel pipe, include: a steel guide pipe 3 and a pipe shoe arranged at the bottom of the steel guide pipe 3; the pipe boot comprises a threaded steel sleeve 2 and a plurality of arc valves 1 which are annularly arranged, wherein the top of the threaded steel sleeve 2 is connected with the bottom of the steel guide pipe 3, and a sealing device is arranged at the connection position of the top of the threaded steel sleeve 2 and the bottom of the steel guide pipe 3; the bottom of the screw thread steel sleeve 2 is hinged with the arc-shaped valves 1, sealing devices are arranged at the hinged positions of the bottom of the screw thread steel sleeve 2 and the arc-shaped valves 1, and the sealing devices are arranged between the arc-shaped valves. In order to ensure the utility model discloses the connection of screw thread steel sleeve 2 and arc valve 1 and the opening and shutting of arc valve 1 are freely in the application, and the arc valve will set up to 3 lamellas, 6 ~ 8 lamella preferred at least.
Wherein, the utility model discloses well sealing device can be for sealed cushion 6 or sealed rubber ring according to actual conditions, and the top and the concrete funnel 4 of steel pipe 3 are connected, are provided with hopper control valve 5 in the junction between the two. The pipe boot is freely opened and closed, and the arc-shaped valve 1 of the pipe boot is tightly closed under the action of water pressure; under the action of the gravity of the concrete in the concrete funnel 4, the arc-shaped valve 1 of the pipe shoe is opened. In the embodiment shown in fig. 1, the arcuate flaps 1 comprise 6 flaps, and sealing means between the 6 arcuate flaps are used to close the arcuate flaps tightly against each other in the closed state.
Specifically, the utility model provides a bored concrete pile is pipe that concrete was poured under water, be exactly a special device of bottom installation at ordinary steel pipe, this special device can open and shut freely, is called the pipe shoe, and its structural component is including the screw thread steel sleeve 2 of connecting steel pipe 3, arc valve 1, sealed cushion 6, and wherein, the bottom of screw thread steel sleeve 2 is articulated with arc valve 1, has sealed cushion 6 between the arc valve 1, ensures that whole pipe shoe is sealed waterproof after closed. The arc-shaped valve 1 in the embodiment shown in fig. 1 is 6 valves, and the number of the valves can be made according to actual needs.
The working principle of the underwater concrete steel guide pipe provided with the pipe shoes is as follows: when the bored pile is drilled to form a hole, mounting a reinforcement cage of the bored pile after the first hole cleaning is finished, then performing the second hole cleaning, discharging a steel guide pipe after the hole cleaning is finished, and performing a vacuum sealing test on the steel guide pipe to ensure that the steel guide pipe is airtight; then, the pipe shoe of the steel guide pipe is detached, and a hydraulic test is carried out on the steel guide pipe to test the pressure resistance of the steel guide pipe; and when the air tightness and the pressure resistance of the steel guide pipe provided with the pipe shoe are qualified, the steel guide pipe is lowered to the position of about 30-40 cm from the bottom of the hole, and the steel guide pipe is positioned in the center of the hole. The pipe shoe is tightly closed by the arc-shaped valve 1 under the action of water pressure, the upper end of the steel guide pipe is connected with the concrete funnel 4, the funnel control valve 5 is arranged at the connection position, when the funnel is filled with the first batch of concrete, the funnel control valve 5 is opened, the underwater concrete instantly presses the air remained in the pipe along the steel guide pipe to reach the bottom of the hole, the arc-shaped valve 1 of the pipe shoe is quickly pushed open by the huge impact force of the concrete due to the absence of the buoyancy force blocking effect of water, a small amount of sediment at the bottom of the hole is flushed and floated in the mud by the huge air pressure, the cement in the first batch of concrete in the steel guide pipe is not flushed by the water, and the first batch of concrete does not have any segregation, and the first batch of concrete with huge potential energy quickly fills the bottom of the hole and is tightly combined with the foundation rock or the firm soil at the bottom of the hole, so that the bottom sealing success of the concrete is ensured, the mud and the sediment at the.
For example, a pile is grouted from a hole with a depth of 50 m and a diameter of 2.5 m on a certain bridge, a steel guide pipe 3 with a diameter of 30cm and connected by screw threads is selected, and a steel concrete funnel 4(11 m)3) After the hole is formed in the drilled pile and cleaned, the steel guide pipe is cleaned again after the lower steel reinforcement cage is fixed, because the drilled pile is an end pump pile, the sediment thickness is 2cm, the steel guide pipe is installed, firstly, a pipe shoe is installed on a first section of the steel guide pipe, a screw thread steel sleeve 2 with screw threads is screwed on the screw thread at the bottom end of the first section of the steel guide pipe, a rubber sealing rubber gasket 6 is arranged at the screw thread connection position, arc-shaped valves 1 (totally 6 valves) of the pipe shoe are closed tightly, rubber sealing gaskets are arranged among the arc-shaped valves 1, the steel guide pipe with one section per 3 meters is installed with the total length of 54 meters, the steel guide pipe is temporarily fixed on a platform of the pile hole by lifting the sinking bottom of the steel guide pipe by 0.4 meter, and then 11m of the steel guide pipe is installed3The periphery of the concrete funnel 4 is fixed by a profile steel support frame, then an underwater pump of C30 is pumped into the concrete funnel 4 by a pump concrete automobile pump, the stacking falling degree is 20cm, and when the concrete of the concrete funnel 4 reaches 11m3Then, the funnel control valve 5 is opened, C30 concrete quickly compresses air in the pipe to the bottom of the pipe along the inner cavity of the steel guide pipe, the arc valve of the pipe shoe is opened instantly by huge air pressure, the air flow pushes down the sediment at the bottom of the hole, the sediment floats in the slurry, the C30 concrete immediately behind the sediment quickly seals the bottom of the hole and is tightly combined with the bedrock at the bottom of the hole, the quality of the concrete at the bottom of the pile is ensured, the floating slurry at the bottom of the pile is eliminated, and the bearing capacity of the pile and the integrity of the pile body are improved. The pile is an industrial pile through ultrasonic detection, and the appearance of the pile is better than that of a similar pile through high strain detection.
According to the above embodiment, the utility model provides a bored concrete pile is concrete under water and is filled steel pipe adopts pipe shoe in the bottom installation of ordinary steel pipe, and the pipe shoe opens and shuts freely, simple structure, simple to operate, and is with low costs, and easy operation, especially can guarantee to the concrete of the overlength stake of straightening fill first batch concrete back cover quality.
The underwater cast-in-place steel pipe for bored pile according to the present invention is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the above-mentioned underwater concrete-poured steel pipe for cast-in-situ bored pile without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (5)
1. An underwater concrete pouring steel guide pipe of a cast-in-situ bored pile is characterized by comprising a steel guide pipe and a pipe shoe arranged at the bottom of the steel guide pipe; wherein,
the pipe boot comprises a screw thread steel sleeve and at least three arc valves which are annularly arranged, wherein,
the top of the screw thread steel sleeve is connected with the bottom of the steel guide pipe, and a sealing device is arranged at the connection position of the top of the screw thread steel sleeve and the bottom of the steel guide pipe;
the bottom of the screw thread steel sleeve is hinged with the arc-shaped valve, and a sealing device is also arranged at the hinged position of the bottom of the screw thread steel sleeve and the arc-shaped valve; and,
and a sealing device is also arranged between the arc valves.
2. The underwater concrete-poured steel pipe for cast-in-situ bored pile according to claim 1,
the sealing device comprises a sealing rubber gasket and a sealing rubber ring.
3. The underwater concrete-poured steel pipe for cast-in-situ bored pile according to claim 1,
the top of the steel conduit is connected with the concrete funnel, and a funnel control valve is arranged at the joint between the steel conduit and the concrete funnel.
4. The underwater concrete-poured steel pipe for cast-in-situ bored pile according to claim 3,
the arc-shaped valves of the pipe shoes are tightly closed under the action of water pressure and opened under the action of gravity of concrete in the concrete funnel.
5. The underwater concrete-poured steel pipe for cast-in-situ bored pile according to claim 1,
the arc-shaped valve is 6 valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621284155.3U CN206529769U (en) | 2016-11-25 | 2016-11-25 | Cast-in-situ bored pile underwater concrete pouring steel conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621284155.3U CN206529769U (en) | 2016-11-25 | 2016-11-25 | Cast-in-situ bored pile underwater concrete pouring steel conduit |
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| Publication Number | Publication Date |
|---|---|
| CN206529769U true CN206529769U (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621284155.3U Active CN206529769U (en) | 2016-11-25 | 2016-11-25 | Cast-in-situ bored pile underwater concrete pouring steel conduit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522218A (en) * | 2016-11-25 | 2017-03-22 | 中冶交通建设集团有限公司 | Cast-in-situ bored pile under-water concrete grouting steel conduct pipe |
| CN108265724A (en) * | 2018-03-30 | 2018-07-10 | 中铁北京工程局集团第工程有限公司 | A kind of brill stake holes concrete secondary back cover device for casting |
| CN111764393A (en) * | 2020-06-30 | 2020-10-13 | 首钢水城钢铁(集团)赛德建设有限公司 | Pressure measurement inspection device for guide pipe for underwater concrete pouring and pouring method |
-
2016
- 2016-11-25 CN CN201621284155.3U patent/CN206529769U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522218A (en) * | 2016-11-25 | 2017-03-22 | 中冶交通建设集团有限公司 | Cast-in-situ bored pile under-water concrete grouting steel conduct pipe |
| CN108265724A (en) * | 2018-03-30 | 2018-07-10 | 中铁北京工程局集团第工程有限公司 | A kind of brill stake holes concrete secondary back cover device for casting |
| CN108265724B (en) * | 2018-03-30 | 2023-09-15 | 中铁北京工程局集团第一工程有限公司 | Bored pile hole concrete secondary back cover pouring device |
| CN111764393A (en) * | 2020-06-30 | 2020-10-13 | 首钢水城钢铁(集团)赛德建设有限公司 | Pressure measurement inspection device for guide pipe for underwater concrete pouring and pouring method |
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