CN210216402U - Drilling machine for extruding, spraying, reaming and pressure-grouting concrete pile - Google Patents
Drilling machine for extruding, spraying, reaming and pressure-grouting concrete pile Download PDFInfo
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- CN210216402U CN210216402U CN201921038854.3U CN201921038854U CN210216402U CN 210216402 U CN210216402 U CN 210216402U CN 201921038854 U CN201921038854 U CN 201921038854U CN 210216402 U CN210216402 U CN 210216402U
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Abstract
The utility model discloses a rig for crowded reaming pressure filling concrete pile that spouts, the spiral hollow drill rod that forms including a plurality of components of a whole that can function independently drilling tool combinations, the unit head that links to each other with spiral hollow drill rod, high-pressure slip casting pipe is installed from top to bottom to spiral hollow drill rod outer wall or inner wall one side, the upper end of high-pressure slip casting pipe links to each other with unit head and slip casting ware, the components of a whole that can function independently drilling tool includes drill bit components of a whole that can function independently drilling tool, hole enlargement components of a whole that can function independently drilling tool and an at least levogyration components of a whole that can function independently drilling tool, the middle part of hole enlargement components of a whole that can function independently drilling tool is the crowded body that expands of uniform diameter hollow circular cylinder, the top of crowded body that expands is equipped with the external diameter from bottom to the last circular cone that gradually reduces, crowded body. The drilling machine does not need to adopt large-torque power output, only needs conventional power output, does not need to replace a drilling tool in the construction process, and is small in power required torque, low in energy consumption and convenient to construct.
Description
Technical Field
The utility model relates to a concrete pile generally speaking, specifically speaking relate to a rig that is used for crowded reaming pressure filling concrete pile that spouts.
Background
The building industry is an industry which consumes a large amount of natural resources and energy and has obvious and outstanding negative effects on the environment, wastes are reduced in building construction, energy consumption is reduced, engineering quality is improved by using an innovative technology, consumption of building materials is reduced, and the building industry is an urgent task.
At present, most of building structure foundation engineering at home and abroad adopts a concrete pile foundation, and soil and slurry in a pile hole can be discharged out of the ground in the construction process of a cast-in-situ bored pile. In order to reduce construction discharge, various spiral soil-extruding cast-in-place piles appear in China in recent years, but the piles of the type have the outstanding problems that construction needs large-torque power transmission and energy consumption is large. In order to meet the requirements of deformation resistance, earthquake resistance and bearing building design, the bearing capacity is improved by lengthening piles, increasing the diameter of a pile body and the like. However, lengthening or enlarging the pile body can increase the concrete consumption, especially when the ratio of the length to the diameter of the pile body is too large, the bearing capacity of the pile body is remarkably reduced, and it is often useless to increase the bearing capacity of the pile body by lengthening or enlarging the diameter of the pile body. Meanwhile, a great deal of concrete waste is caused.
When the conventional spiral soil-squeezing cast-in-place pile is drilled, soil layers around the concrete pile are squeezed densely, the frictional resistance and the end resistance around the concrete pile are improved by about 50%, the bearing capacity of more single piles is improved, and the difficulty is very high. Therefore, the process is very complicated, and the constructor usually selects different drilling tools according to different stratum hardness conditions, for example, a sand layer drill rod is used in a sand layer, a hard soil layer drill rod is used in a hard soil layer, and the like, and when the constructor encounters a hard stratum, two motors with the power output of more than 75kW are usually adopted to complete the drilling.
Although the drilling is completed in the construction mode, the original stratum skeleton structure is damaged due to forced drilling by using a drilling tool with large torque power transmission and high hardness, damaged rock and soil particles are extruded together, but a new skeleton structure cannot be effectively formed, and as time goes on, moisture in the external environment continuously permeates, the rock and soil particles near the concrete pile form a skeleton again to sink, so that the bearing capacity of the concrete pile is reduced.
Therefore, in order to solve the above problems, there is a strong need for improvement of the existing extruded and expanded pile, construction method and drilling machine used therefor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rig that is used for crowded reaming of spouting to press to irritate concrete pile.
The technical scheme is as follows:
a drilling machine for extruding, spraying, reaming and pressure pouring concrete pile is composed of a spiral hollow drill rod consisting of multiple split drilling tools, a power head connected to said spiral hollow drill rod, a high-pressure grouting pipe installed to the external or internal surface of core tube of spiral hollow drill rod from top to bottom, a grouting unit connected to said power head and said grouting pipe, the split drilling tools comprise drill bit split drilling tools, expanding split drilling tools and at least one left-handed split drilling tool, the middle part of the expanding split drilling tool is an equal-diameter hollow cylindrical extruding and expanding body, an upper conical table with the outer diameter gradually reduced from bottom to top is arranged above the extruding and expanding body, a lower truncated cone with the outer diameter gradually increasing from bottom to top is arranged below the extruding and expanding body, a plurality of layers of grouting nozzles are arranged at the lower end of the high-pressure grouting pipe, the grouting nozzle is positioned below the outer edge of the helical blade of the drill split drilling tool, and the width of the outer helical blade of the split drilling tool is 5-20 cm. When the split drilling tool is used for soft soil stratum construction, the width of the outer helical blade of the split drilling tool is 5-10 cm.
Crowded reaming pressure concrete pile drilling machine that spouts, wherein, the slip casting shower nozzle evenly arranges along drilling rod blade circumferencial direction, the interval of adjacent two-layer slip casting shower nozzle is 5-35cm, every layer of slip casting shower nozzle is equipped with 1 or a plurality of nozzle, injection pressure is 1-40 MPa.
Crowded reaming pressure concrete pile drilling machine that spouts, wherein, the slip casting shower nozzle is the three-layer, is equipped with 1-2 nozzles on every layer of slip casting shower nozzle, and the diameter of nozzle is 2mm-3 mm. The projections of the three layers of grouting nozzles on the horizontal plane are uniformly distributed at 120 degrees.
Wherein, the length of the drill bit split drilling tool is 1-1.5m, the length of the expanding split drilling tool is 1-1.5m, and the number of the left-handed split drilling tools is determined according to the design depth.
The outer helical blades of all the split drilling tools are equal pitch or variable pitch; the diameter of the external spiral blade is equal to the diameter of the pile body of the designed cast-in-place pile. All the split drilling tools are connected through hollow hexagonal quick connectors or flanges.
The utility model discloses the construction method of rig adopts crowded native drilling tool pore-forming, spouts cutting soil body with multilayer high-pressure nozzle soon and forms the double cone platform soil cement and expands footpath body, and the grout rises in the same direction as space around the drilling rod simultaneously, and with the loose soil in the stake hole by the left-handed rotation drilling tool stirring into soil cement, on the pore wall around the stake hole, the diameter of the hole enlargement body has been increased. After the jet grouting expanding body is finished, lifting a drill rod to press, fill, vibrate and extrude concrete to replace cement in the expanding body to form a combined expanding body with an inner core made of concrete and the periphery made of cement; then lifting the drill to press and pour the concrete pile body, the drill tool continues to rotate to gradually extrude all or most of the soil cement formed by mixing the soil collapsed, drilled loose or reduced diameter between the hole walls of the drill tool and the cement slurry sprayed upwards (on one hand, the expanded diameter body of the expanded diameter split drill tool at the lower part continuously extrudes the soil mass, on the other hand, the drill rod formed by connecting the left-handed split drill tool at the upper part has long length, the blade width of the drill tool is only 5-20cm, most of the soil mass cannot be taken out of the hole along with the blade and is continuously extruded into the surrounding stratum) to form a cement soil layer, the diameter of the pile body is increased, as the lubrication of water in the gaps of the soil layer is increased, the soil layer particles with different shapes and sizes are further rearranged after extrusion, a layer of compaction soil layer with higher density is formed at the outermost side of the cement soil layer (as the water quantity required by cement hydration is far, therefore, the excess water in the cement paste is about 50%, the excess water penetrates into the surrounding squeezed stratum by rotary extrusion with a drilling tool, thicker cement particles cannot enter the far stratum, a thin cement soil layer is formed on the outermost side of the cement soil layer, the water can penetrate into the far stratum and further react with soil layer particles damaged by the original structure to form a more compact and new structural framework, namely, the squeezed soil layer is solidified and bonded, the strength is gradually increased, the soil layer around the whole pile body is little in compression deformation and most suitable for being jointly supported by composite foundation pile soil), and the extrusion-spraying, reaming and pressure-grouting concrete pile is formed. And the bearing capacity of the pile body is increased along with the time.
The concrete, cement soil layer and compacted soil layer are tightly connected together, the pile body and the inverted cone expanding body are integrated, when the pile top is pressed, the pile body and the soil layer around the cone are squeezed together to bear force, and the original frictional resistance between pile soils is converted into the shearing force of the soil layer except the compacted soil layer.
The utility model discloses crowded reaming drilling tool construction bored concrete pile that spouts that the rig made increases the re-spraying number of times with the multilayer shower nozzle at the different degree of depth in stratum with the high pressure jet grouting technique, spouts into the reasonable pile type of different diameter hole enlargement body constitution wedge type back taper platform. A part of cement paste in the rotary spraying cement paste rises along the drill rod, and redundant moisture permeates into the soil layer to increase the lubrication among soil particles, so that the energy consumption is low, and the soil layer can be compacted. The high-pressure jetting extrusion of the soil layer around the pile is close to the passive soil pressure, the pile body of the extruded and expanded hole is welded in the expanding body of the frustum, so that the compacted soil layer around the pile body is connected with the compacted soil layer of the frustum, therefore, in the engineering calculation of the bearing capacity of the extruded and expanded hole concrete-poured pile, the common action problem of the compacted soil around the pile is considered, the area of the pile side is increased, the pile body and the compacted soil layer around the frustum are pulled to bear force together, and the original frictional resistance between the pile soils is converted into the shearing force of the soil layer outside the compacted cement soil layer. Therefore, the advantages of extrusion, spraying, reaming and pressure grouting of the concrete pile are obvious in technology, cost and environmental protection.
Compared with the prior art, the utility model discloses an outstanding effect lies in:
(1) in the prior art, when a hard soil stratum is drilled, high-torque power transmission (generally 2 motors with the power of 75 kW) is needed, and a high-hardness drilling tool needs to be replaced; the utility model can be constructed only by adopting conventional power output without adopting large torque power output, and the drilling tool does not need to be replaced in the construction process (the requirement on the hardness of the drill bit is low), the power requirement torque is small, the energy consumption is low, and the construction is convenient; just the utility model discloses the closely knit degree in the final crowded dense stratum of rig will be greater than the closely knit degree in "short screw pile machine" construction stratum among the prior art.
(2) In the prior art, when a hole is drilled in a hard soil stratum, most of soil cannot be extruded into the hole wall due to the hard stratum, so that the hole is difficult to form; the utility model can extrude all or most of the soil body and slurry in the pile hole into the soil body around the pile hole due to the participation of water in cement paste, the narrow blade width (only 5-20 cm; for example, when the diameter of the pile is 400mm, the blade width is 5 cm; when the diameter of the pile is 800mm, the blade width is 20cm), the rotation extrusion of the drilling tool and other key elements, and can reduce the soil output by 60% at least, thereby being more efficient and environment-friendly.
(3) The utility model discloses crowded reaming drilling tool construction bored concrete pile that spouts that the rig made does not increase the material quantity under equal geological conditions, does not change on the pile technology basis of pressure filling, only needs the cylindrical pile body of uniform cross-section usually, with crowded soil reaming equipment in the crowded pore wall soil layer of pile body, simultaneously with the reasonable pile type of grout reaming pressure filling concrete preparation back taper platform in frustum holding force layer.
(4) The utility model discloses crowded reaming drilling tool construction bored concrete pile that spouts that the rig made improves single stake bearing capacity 1-3 times, practices thrift building material, less goes out the waste material, more can protect natural environment, is a high bearing capacity, low compression deformation environment-friendly stake.
The following description and specific embodiments of the present invention will further explain the drilling machine for extruding, spraying, reaming and pressure-grouting concrete piles.
Drawings
FIG. 1 is a schematic structural view of a concrete pile drilling machine for extrusion, spraying, reaming and pressure grouting;
FIG. 2 is a schematic structural view of a split drill of a drill bit;
FIG. 3 is a schematic structural view of an expanding split drilling tool;
FIG. 4 is a schematic structural view of a left-handed split drilling tool;
FIG. 5 is a top view of the split drill bit;
FIG. 6 is a schematic cross-sectional view of a squeeze-spray, hole-expanding, pressure-grouting concrete pile;
FIG. 7 is a flow chart of the construction of extrusion-grouting, hole-enlarging and pressure-grouting concrete pile.
Detailed Description
Example 1
Referring to fig. 1-5, a drilling machine for extrusion, spraying, reaming and pressure grouting concrete pile comprises a spiral hollow drill rod formed by combining a plurality of split drilling tools and a power head 5 connected with the spiral hollow drill rod, wherein one side of the outer wall or the inner wall of a core pipe of the spiral hollow drill rod is provided with a high-pressure grouting pipe 4 from top to bottom, the upper end of the high-pressure grouting pipe 4 is connected with a grouting device 6 through the inner cavity of the power head 5, the split drilling tools comprise a drill bit split drilling tool 1, an expanding split drilling tool 2 and at least one left-handed split drilling tool 3, as shown in fig. 3, the middle part of the expanding split drilling tool 2 is a hollow cylindrical extrusion body 21 with equal diameter, an upper conical table 22 with gradually reduced outer diameter from bottom to top is arranged above the extrusion body 21, a lower conical table 23 with gradually increased outer diameter from bottom to top is arranged below the extrusion body 21, the lower end of the high-pressure grouting pipe 4 is provided with a plurality of grouting nozzles 11, the grouting nozzles 11 are arranged below, the width of the outer spiral blade of the split drilling tool is 5-20 cm.
The distance between two adjacent layers of grouting nozzles 11 is 15cm, each layer of grouting nozzles 11 is provided with 2 nozzles, and the injection pressure is 1-40 MPa.
The grouting spray heads 11 are three layers, each layer of grouting spray heads 11 is provided with 2 nozzles, and the diameter of each nozzle is 2 mm. The projections of the three layers of grouting nozzles on the horizontal plane are uniformly distributed at 120 degrees.
Wherein, the length of the drill bit split drilling tool is 1-1.5m, the length of the expanding split drilling tool is 1-1.5m, and the number of the left-handed split drilling tools is determined according to the design depth.
The outer helical blades of all the split drilling tools are equal pitch or variable pitch; the diameter of the external spiral blade is equal to the diameter of the pile body of the designed cast-in-place pile. All the split drilling tools are connected through hollow hexagonal quick connectors or flanges.
In other engineering embodiments, the number of layers of the grouting nozzles can be 2-10 according to actual construction requirements. Each layer of grouting spray head can be provided with 1-6 nozzles, and the pressure bearing of each nozzle is set to be 1-40 MPa. The distance between two adjacent grouting spray heads can be 5-35cm, the horizontal distance between two adjacent nozzles in each grouting spray head layer can be 1-6 cm, and the diameter of each nozzle can be 2-10 mm.
Example 2
As shown in fig. 6, the extrusion-spray reaming pressure-grouting concrete pile comprises a pile body 101, an expanding body 102 and a pile end 103, wherein the pile body comprises concrete 100, a cement layer 200 and an extrusion-dense soil layer 300 from inside to outside. A reinforcement cage 400 is arranged in the pile body.
The expander 102 is disposed in a layer of soil having a relatively high modulus of deformation and high shear resistance.
The maximum diameter of the pile body 101 is smaller than that of the reducing body 102, and the maximum diameter of the pile body 101 is larger than or equal to that of the pile end 103.
The diameter-expanding body 102 is a double-frustum-shaped diameter-expanding body which is integrally formed with the pile body 101, and the number of the diameter-expanding bodies is one, and the included angle α between the lower inclined plane of the double-frustum-shaped diameter-expanding body and the central axis of the pile body is 5-80 degrees.
As shown in fig. 7, the construction method of the extrusion-spray reaming pressure-grouting concrete pile comprises the following steps:
(1) when drilling is performed by combining the drilling rig of example 1 with a three-point pile driver stand, and drilling in hard soil is difficult, cement paste or water is sprayed in a rotating manner to soften the soil, and drilling is continued until the designed depth is reached, as shown in fig. 7 a.
(2) Adjusting the pressure (1-40MPa) and the lifting speed (6-60cm/min) of a nozzle, carrying out rotary spraying on cement paste by a left-handed lifting drill rod to manufacture a cement-soil double-frustum diameter-expanding body, sequentially pressing and pouring the extruded concrete as shown in figure 7b, forming a concrete and cement-soil composite double-frustum diameter-expanding body at the design height of the rotary spraying diameter-expanding body, and stopping rotary spraying as shown in figure 7 c;
(3) adjusting the lifting speed, continuously lifting the drill rod in a left-hand rotation manner, simultaneously pressing and pouring concrete to a designed elevation of the pile top, when the drill rod is lifted, cement slurry rising along the drill rod wets soil, the drilling tool gradually extrudes all or most of cement soil formed by mixing collapsed, drilled loose or reduced soil between the hole walls of the drilling tool and the cement slurry rising in a rotary spraying manner to soil around the hole walls of the pile to form cement soil layers, the diameter of the pile body is increased, soil particles with different shapes and sizes are further rearranged due to the lubricating effect of water in gaps of the soil layers, a dense soil layer with higher density is formed on the outermost side of the cement soil layers, and finally a plain concrete pile sequentially comprising concrete, the cement soil layers and the dense soil layers from inside to outside is formed, as shown in fig. 7 d.
(4) After the plain concrete pile is formed, the reinforcement cage is inserted into the concrete in the pile hole to a designed depth to form a reinforced concrete pile, as shown in fig. 7 e.
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (4)
1. A rig for crowded reaming pressure grouting concrete pile that spouts, include spiral hollow drill rod that forms by a plurality of components of a whole that can function independently drilling tool combinations, power head (5) that link to each other with spiral hollow drill rod, high-pressure slip casting pipe (4) are installed from top to bottom to core pipe outer wall or inner wall one side of spiral hollow drill rod, and the inner chamber that power head (5) were passed through to the upper end of high-pressure slip casting pipe (4) links to each other its characterized in that with slip casting ware (6): the split drilling tool comprises a drill bit split drilling tool (1), an expanding split drilling tool (2) and at least one left-handed split drilling tool (3), the middle part of the expanding split drilling tool (2) is an equal-diameter hollow cylindrical extruding and expanding body (21), an upper cone frustum (22) with the outer diameter gradually decreasing from bottom to top is arranged above the extruding and expanding body (21), a lower cone frustum (23) with the outer diameter gradually increasing from bottom to top is arranged below the extruding and expanding body (21), a plurality of layers of grouting nozzles (11) are arranged at the lower end of a high-pressure grouting pipe (4), the grouting nozzles (11) are located below the outer edge of a helical blade of the drill bit split drilling tool (1), and the width of an outer helical blade of the split drilling tool is 5-20 cm.
2. The drilling machine for extrusion-spray reaming pressure-grouting concrete piles as claimed in claim 1, wherein: when the split drilling tool is used for soft soil stratum construction, the width of the outer helical blade of the split drilling tool is 5-10 cm.
3. A drill for extrusion-spray reaming pressure-grouting concrete piles according to claim 1 or 2, characterized in that: the grouting nozzles (11) are uniformly arranged along the circumferential direction of the drill rod blade, the distance between two adjacent layers of grouting nozzles (11) is 5-35cm, each layer of grouting nozzle (11) is provided with 1 or more nozzles, and the injection pressure is 1-40 MPa.
4. A drill for extrusion-spray reaming pressure-grouting concrete piles according to claim 3, characterized in that: the grouting spray heads (11) are three layers, 1-2 nozzles are arranged on each layer of grouting spray heads (11), and the diameter of each nozzle is 2-3 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921038854.3U CN210216402U (en) | 2019-07-04 | 2019-07-04 | Drilling machine for extruding, spraying, reaming and pressure-grouting concrete pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921038854.3U CN210216402U (en) | 2019-07-04 | 2019-07-04 | Drilling machine for extruding, spraying, reaming and pressure-grouting concrete pile |
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| CN210216402U true CN210216402U (en) | 2020-03-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206030A (en) * | 2019-07-04 | 2019-09-06 | 山东倍特力地基工程技术有限公司 | Squeeze spray reaming cast-with-pressure concrete pile and its construction method and drilling machine |
| CN113322931A (en) * | 2021-06-25 | 2021-08-31 | 长安大学 | Soft soil foundation consolidates compaction stake construction equipment |
| CN113374425A (en) * | 2021-07-05 | 2021-09-10 | 浙江工业职业技术学院 | Exempt from to irritate stake perforating device in clear hole |
| CN114657967A (en) * | 2022-03-10 | 2022-06-24 | 浙江新盛建设集团有限公司 | Temporary concrete road reinforcing device for construction of soft soil layer |
| CN114769303A (en) * | 2022-06-20 | 2022-07-22 | 江苏盖亚环境科技股份有限公司 | Soil sampling restores supplementary compact injection drilling tool of integrative rig |
-
2019
- 2019-07-04 CN CN201921038854.3U patent/CN210216402U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206030A (en) * | 2019-07-04 | 2019-09-06 | 山东倍特力地基工程技术有限公司 | Squeeze spray reaming cast-with-pressure concrete pile and its construction method and drilling machine |
| CN113322931A (en) * | 2021-06-25 | 2021-08-31 | 长安大学 | Soft soil foundation consolidates compaction stake construction equipment |
| CN113374425A (en) * | 2021-07-05 | 2021-09-10 | 浙江工业职业技术学院 | Exempt from to irritate stake perforating device in clear hole |
| CN114657967A (en) * | 2022-03-10 | 2022-06-24 | 浙江新盛建设集团有限公司 | Temporary concrete road reinforcing device for construction of soft soil layer |
| CN114657967B (en) * | 2022-03-10 | 2024-04-16 | 浙江新盛建设集团有限公司 | Temporary concrete road reinforcing device for soft soil layer construction |
| CN114769303A (en) * | 2022-06-20 | 2022-07-22 | 江苏盖亚环境科技股份有限公司 | Soil sampling restores supplementary compact injection drilling tool of integrative rig |
| CN114769303B (en) * | 2022-06-20 | 2022-09-27 | 江苏盖亚环境科技股份有限公司 | Soil sampling restores supplementary compact injection drilling tool of integrative rig |
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