CN218346168U - Steel casing device for pile foundation construction of weak stratum - Google Patents
Steel casing device for pile foundation construction of weak stratum Download PDFInfo
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- CN218346168U CN218346168U CN202221465059.4U CN202221465059U CN218346168U CN 218346168 U CN218346168 U CN 218346168U CN 202221465059 U CN202221465059 U CN 202221465059U CN 218346168 U CN218346168 U CN 218346168U
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Abstract
The utility model discloses a steel casing device for pile foundation construction of weak stratum, which comprises a first section steel casing main body; the cutting edge foot comprises a sleeve which is obliquely arranged with the periphery of the first section of steel casing main body, the sleeve is sleeved at the end part of the first section of steel casing main body, and an included angle is formed between the sleeve and the first section of steel casing main body; the cutting edge foot is far away from the construction end of the first section of steel casing main body to form a table top with width; the grouting port is formed in the width direction of the table top and forms a pressure flow groove along the direction of the sleeve towards the construction end of the first section of steel casing main body; and the calibrating mechanism is positioned on the outer wall of the first section of steel casing main body. The utility model is additionally provided with the cutting edge feet which are obliquely arranged, so that the end part is favorable for cutting soil layers when the steel casing is buried downwards in construction; the table top has a width, can effectively isolate the contact between the upper steel casing and the surrounding soil layer, reduces the friction resistance, can adopt pressure injection air or thixotropic slurry, and has strong applicability.
Description
Technical Field
The utility model relates to a bored concrete pile construction technical field specifically is a steel protects a device for construction of weak stratum pile foundation.
Background
When the cast-in-situ bored pile is constructed in soft strata such as silt, a water-rich sand layer, untreated filling, high-compressibility soil, collapsible loess and underwater, the steel casing is difficult to bury, the bottom end of the steel casing cannot be tightly sealed due to the soft strata, so that mud backflow and leakage are caused, the steel casing is poor in verticality and is easy to cause hole collapse and subsidence of the steel casing, the water head height in the steel casing cannot be guaranteed, and therefore difficulty and safety risks are caused for the construction of the cast-in-situ bored pile. Therefore, it is of great significance to adopt effective measures to ensure the perpendicularity of the steel casing and the sealing and the stability of the bottom end in the cast-in-situ bored pile construction in the weak stratum.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steel protects a device for weak stratum pile foundation construction for the first festival steel of bottommost protects a section of thick bamboo, and it is through cutting edge foot, mesa, pressure launder and aligning gear etc. for at weak stratum, can realize the protection to drilling.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a steel casing device for weak stratum pile foundation construction is used for a first section of steel casing at the bottommost part, and comprises,
the first section of steel casing main body is provided with a construction end at one end and a connecting end at the other end;
the cutting edge foot comprises a sleeve which is obliquely arranged with the periphery of the first section of steel casing main body, the sleeve is sleeved at the end part of the first section of steel casing main body, and an included angle is formed between the sleeve and the first section of steel casing main body;
the cutting edge foot is far away from the construction end of the first section of steel casing main body to form a table top with a width;
the grouting port is formed in the width direction of the table board and forms a pressure flow groove along the direction of the sleeve towards the construction end of the first section of steel casing main body;
the calibrating mechanism is located on the outer wall of the first section of steel casing main body and used for monitoring the verticality of the first section of steel casing main body in real time.
Among this technical scheme, at first, increased the cutting edge foot that the slope set up, and then in the construction, utilize the cutting edge foot that has certain sectioning angle, the steel protects a section of thick bamboo and is favorable to the tip to cut the soil layer when burying underground down, and the available hydraulic hammer of the mode of burying underground, conventional mechanical equipment such as vibration hammer are supplementary, and cutting edge top mesa has certain width, can effectively keep apart upper portion steel and protect a section of thick bamboo and peripheral soil layer contact to reduce frictional resistance, also can adopt pressure injection air or thixotropic mud, the suitability is stronger.
In the technical scheme, the grouting port is positioned on the table top at the top of the cutting edge foot, the grouting port vertically downwards forms a plurality of channels, namely grouting hydraulic launders, at the inclined cutting part, the number and the diameter of the channels are comprehensively determined according to the conditions of the diameter of the steel casing, the grouting pressure, the soil layer property, the underground water distribution state and the like, the application range is wide, and large-scale popularization and application are facilitated.
And once more, through the utility model provides a first section steel protects a section of thick bamboo device, in the construction of weak stratum drilling bored concrete pile, the steel protects a section of thick bamboo and reaches assigned position department and carries out the slip casting and consolidate, and the slip casting liquid concreties with surrounding soil layer, thereby forms firm impervious barrier and helps protecting the inside hydrohead that forms of a section of thick bamboo and highly improve pile foundation construction quality, can effectively guarantee the straightness that hangs down of a section of thick bamboo when pile foundation operation simultaneously, has eliminated some hole of collapsing, steel protects a safety risk and quality hidden danger such as a section of thick bamboo sinks.
As a further improvement, the first section steel protects a main part and forms through the steel sheet rolling, the sleeve an organic whole set up in the first section steel protects in a main part.
In the technical scheme, an integrally welded structure is adopted, so that the connection relationship between the two is firm, and the steel plate is good in stability and convenient to process and obtain in construction; the steel plate is rolled to form the steel casing, so that the steel plate is easy to obtain and convenient to manufacture.
As a further improvement of the utility model, the included angle formed by the sleeve and the main body of the first section steel casing is an acute angle, and the angle of the acute angle is 30-60 degrees.
In the technical scheme, the included angle cannot be too large, otherwise, a larger wide surface is formed when the steel casing is downwards inserted and beaten, and the end part resistance and the side surface friction resistance with the surrounding soil layer are further increased; and the acute angle can reduce the problem, but if the angle is too small and is less than 30 degrees, the too narrow pouring reinforcement range is too small, the strength is difficult to meet the requirement, and if the angle is more than 60 degrees, the width of the table top is too wide, the downward inserting and beating resistance is additionally and greatly increased, and the too much significance is avoided.
As a further improvement, the sleeve periphery is provided with the cutting tooth mouth, the sharp-pointed portion of cutting tooth mouth protects the construction end setting of a main part towards first section steel.
Among this technical scheme, choose for use the cutting tooth mouth, and then protect a hammering at the steel, static pressure or vibration more be favorable to advancing in the soil layer when burying underground for the operating efficiency is higher.
As a further improvement of the utility model, the grouting openings are a plurality of which are distributed on the table-board in an annular shape.
In this technical scheme, the slip casting mouth forms the annular, can realize the pressurization slip casting in a plurality of mouths, ensures the even increase of intensity all around, of course, also can pour through a mouth only, specifically adjusts according to the demand.
As a further improvement, the utility model also includes the firm layer of formation through pouring, the thickness on firm layer is greater than telescopic thickness.
Among this technical scheme, steel casing tip increases than thicker firm layer, and the purpose can effectively guarantee to hang down straightness and make the steel casing form certain flood peak height when carrying out drilling bored concrete pile construction operation, helps pile foundation construction quality assurance volume in the weak stratum to accomplish, reduces quality safety risk.
As a further improvement of the utility model, the water-stopping rubber ball is further included, the water-stopping rubber ball is arranged in the pressure flow groove.
Among this technical scheme, rubber stagnant water ball sets up in slip casting hydraulic pressure chute passageway bottom, and the first section steel protects a section of thick bamboo and plays the effect of shutoff slip casting hydraulic pressure chute passageway before burying underground the assigned position, after the steel protects a section of thick bamboo and reaches the assigned position slip casting, because the ejecting pressure flow notch of slip casting pressure.
As a further improvement of the utility model, the pressure groove is of an annular structure surrounding the cutting edge foot.
Among this technical scheme, can choose for use annular pressure launder, form annular mode of pouring, can fully realize the effect of reinforcing the soil body.
As a further improvement, the calibration mechanism comprises a base, the base is a magnetic attraction structure, the magnetic attraction structure is connected with the outer wall of the first section steel casing main body through magnetic attraction.
Among this technical scheme, set up the base of magnetism structure of inhaling for detachable the connection can be realized to aligning gear and first section steel pile section of thick bamboo main part, and firm in connection, when carrying out the construction of co-altitude, all can guarantee the measurement of straightness that hangs down.
Further, the aligning gear includes the base, the base is magnetic structure, sets up the switch that is used for controlling the magnetic force switching, magnetic structure with first festival steel protects a main part outer wall magnetism to be inhaled and is connected, and it beats to bury to close magnetic switch and takies the device before accomplishing to insert when first festival steel protects a section of thick bamboo, opens magnetic switch after second festival steel protects a welding is accomplished and makes the device adsorb and beat the straightness that hangs down in order to correct the interpolation of monitoring second festival steel protection section of thick bamboo at second festival steel protection section of thick bamboo outer wall to this analogizes to accomplish gradually the steel and protects the merogenesis welding of a section of thick bamboo and insert and beat the work.
As a further improvement of the present invention, the calibration mechanism further comprises a level gauge disposed perpendicular to the base.
In the technical scheme, after a pile casing, namely the center of a pile foundation, is measured and positioned, conventional mechanical equipment such as a hydraulic hammer and a vibration hammer is utilized to assist the steel pile casing to be inserted and beaten or embedded.
Drawings
Fig. 1 is a schematic structural diagram of a steel casing device for pile foundation construction in a weak stratum provided by the utility model;
fig. 2 is a schematic structural view of the table top provided by the present invention;
in the figure:
1. a first section of steel casing main body; 11. a construction end; 12. a connecting end; 2. cutting edge feet; 21. a table top at the top of the blade leg; 22. the inner edge of the steel casing; 23. a stabilizing layer; 24. a sleeve; 3. a pressure sink; 4. a grouting port; 5. grouting pipes; 6. a rubber water stopping ball; 7. a calibration mechanism; 71. a switch; 72. a level gauge; 73. a base; 8. a split weld; 9. and the second to N sections of steel casings.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Example 1
In the embodiment, a core structure of a steel casing device for soft stratum pile foundation construction is mainly introduced.
Referring to fig. 1-2, the steel casing device for weak stratum pile foundation construction in the embodiment is used for a bottommost first section steel casing, and comprises,
the steel pile casing comprises a first section of steel pile casing main body 1, wherein one end of the first section of steel pile casing main body 1 forms a construction end 11, and the other end of the first section of steel pile casing main body forms a connecting end 12;
the cutting edge leg 2 comprises a sleeve 24 which is obliquely arranged with the periphery of the first section of steel casing main body 1, the sleeve 24 is sleeved at the end part of the first section of steel casing main body 1, and an included angle is formed between the sleeve and the first section of steel casing main body;
the table board 21 is formed by the cutting edge leg 2 which is far away from the construction end of the first section of steel casing main body 1, and the table board 21 with the width is formed;
the grouting opening 4 is formed in the width direction of the table board 21, and the grouting opening 4 forms a pressure flow groove 3 towards the construction end direction of the first section of steel casing main body 1 along the sleeve 24;
and the calibrating mechanism 7 is positioned on the outer wall of the first section of steel casing main body 1 and is used for monitoring the verticality of the first section of steel casing main body 1 in real time.
In the embodiment, firstly, the obliquely arranged cutting edge feet are added, and then in construction, the cutting edge feet with a certain sectioning angle are utilized, the steel pile casing is beneficial to cutting soil layers at the end part when being buried downwards, the burying mode can be assisted by conventional mechanical equipment such as a hydraulic hammer and a vibration hammer, the table top at the top of the cutting edge feet has a certain width, the upper steel pile casing can be effectively isolated from being in contact with the peripheral soil layers, so that the friction resistance is reduced, air or thixotropic slurry can be injected under pressure, and the applicability is strong.
In the embodiment, the grouting port is positioned on the top table surface of the cutting edge foot, a plurality of channels, namely the grouting hydraulic launder, are vertically formed downwards at the inclined cutting part by the grouting port, the number and the diameter of the channels are comprehensively determined according to the conditions of the diameter of the steel casing, the grouting pressure, the soil layer property, the underground water distribution state and the like, the application range is wide, and large-scale popularization and application are facilitated.
And once more, through the utility model provides a first section steel protects a section of thick bamboo device, in the construction of weak stratum drilling bored concrete pile, the steel protects a section of thick bamboo and reaches assigned position department and carries out the slip casting and consolidate, and the slip casting liquid concreties with surrounding soil layer, thereby forms firm impervious barrier and helps protecting the inside hydrohead that forms of a section of thick bamboo and highly improve pile foundation construction quality, can effectively guarantee the straightness that hangs down of a section of thick bamboo when pile foundation operation simultaneously, has eliminated some hole of collapsing, steel protects a safety risk and quality hidden danger such as a section of thick bamboo sinks.
Example 2
In this embodiment, the connection between the sleeve and the first-section steel casing main body is mainly described.
Referring to the attached drawings, the first section of steel casing main body 1 is formed by rolling a steel plate, and the sleeve 24 is integrally arranged on the first section of steel casing main body 1.
In the embodiment, an integrally welded structure is adopted, so that the connection relationship between the two is firm, the stability is good in construction, and the processing and obtaining are convenient; the steel plate is rolled to form the steel casing, because the steel plate is easy to obtain and is convenient to process and manufacture.
Specifically, the included angle formed by the sleeve 24 and the first section steel casing main body 4 is an acute angle, and the angle of the acute angle is 30-60 degrees.
In the embodiment, the included angle cannot be too large, otherwise, a larger wide surface is formed when the steel casing is downwards inserted and beaten, and the end part resistance and the side surface friction resistance with a surrounding soil layer are further increased; and the acute angle can reduce the problem, but if the angle is too small, less than 30 degrees, the too narrow reinforcing range of pouring is too small, the strength is difficult to meet the requirement, and when the angle is more than 60 degrees, the width of the table top is too wide, the downward inserting and hitting resistance is additionally and greatly increased, and the too much significance is not provided.
Further, the sleeve 24 is provided with a cutting tooth mouth (not shown in the figure) at the periphery, and the sharp part of the cutting tooth mouth is arranged towards the construction end of the first section steel casing main body.
In this embodiment, choose for use the cutting tooth mouth, and then more be favorable to advancing in the soil layer when the steel protects a hammering, static pressure or vibration to bury underground for the operating efficiency is higher.
Furthermore, the number of the grouting openings 4 is several, and the several grouting openings 4 are annularly arranged on the table-board 21.
In this embodiment, the slip casting mouth annular distributes, can realize pouring simultaneously of a plurality of mouths, ensures the increase of simultaneous strength, of course, also can pour through a mouth only, specifically adjusts according to the demand.
Example 3
In this embodiment, description is made in conjunction with other structures.
Referring to fig. 2, a stabilizing layer 23 formed by pouring is further included, and the thickness of the stabilizing layer 23 is much greater than that of the sleeve 24.
In this embodiment, increase than thicker firm layer, the purpose can effectively guarantee the straightness that hangs down and make the steel protect and form certain flood peak height when carrying out drilling bored concrete pile construction operation, helps pile foundation construction quality assurance volume to accomplish in the weak stratum, reduces quality safety risk.
In order to realize water stopping, the device further comprises a rubber water stopping ball 6, and the rubber water stopping ball 6 is arranged in the pressure flow groove 3.
In the embodiment, the rubber water stop ball is arranged at the bottom of the grouting hydraulic launder channel, the first section of steel casing is embedded to the designated position and then used for plugging the grouting hydraulic launder channel, and the pressure flow notch is ejected due to grouting pressure after the steel casing reaches the designated position for grouting.
Further, the pressure flow groove 3 is an annular structure surrounding the sleeve 24.
In this embodiment, annular pressure launder can be selected for use, forms the annular mode of pouring, can fully realize the effect of consolidating the soil body.
Referring to fig. 1, the calibration mechanism 7 includes a base 73, the base is a magnetic attraction structure, and the magnetic attraction structure is magnetically connected with the outer wall of the first steel casing main body.
In this embodiment, set up the base of magnetic structure for the calibration mechanism can realize detachable being connected with first section steel pile casing main part, and firm in connection, when carrying out the not construction of co-altitude, all can guarantee the measurement of straightness that hangs down. In use, the base is the magnetic structure, sets up the switch that is used for controlling the magnetic force switching, the magnetic structure with first festival steel protects a section of thick bamboo main part outer wall magnetism and inhales and is connected, and it beats to close magnetic switch and takies the device to bury before accomplishing when first festival steel protects a section of thick bamboo, opens magnetic switch and makes the device adsorb and beat the straightness that hangs down in order to correct the interpolation of monitoring second festival steel protecting a section of thick bamboo after second festival steel protects a section of thick bamboo welding completion to this analogizes and accomplishes the steel gradually and protect the section of thick bamboo and insert and beat the work.
Further, the calibration mechanism 7 further comprises a level 72 vertically arranged with a base 73, and the base 73 is connected with a switch 71 for controlling the magnetic switch.
In the embodiment, after the pile casing, namely the center of the pile foundation, is measured and positioned, the steel pile casing is assisted by a hydraulic hammer, a vibratory hammer and other conventional mechanical equipment to be inserted and beaten or embedded.
Example 4
In this embodiment, a description is given with reference to a construction process and a component in construction.
Referring to fig. 1-2, the steel casing device for pile foundation construction in weak stratum in the embodiment comprises,
the steel pile casing comprises a first section of steel pile casing main body 1, wherein the first section of steel pile casing main body 1 is arranged at the upper part of a cutting edge foot 2, and the cutting edge foot 2 and the first section of steel pile casing main body 1 are integrally manufactured or assembled and connected in a processing field;
the grouting opening 4 is positioned on the table top 21 at the top of the cutting edge leg 2, and the grouting opening 4 vertically downwards forms a plurality of channels at the inclined cutting part, namely a flow pressing groove 3 of grouting liquid;
the high-pressure grouting pipe 5 is a pressure-bearing pipe with a certain length, can extend to the top surface of pile foundation construction to be connected with a grouting instrument, and has a certain shaping adjustable angle and direction;
the rubber water stopping ball 6 is arranged at the bottom of a pressure flow groove 3 channel of grouting liquid, a first section of steel casing is buried in a specified position to play a role in plugging a grouting hydraulic flow groove channel, and after the steel casing reaches the specified position for grouting, a pressure flow groove opening is ejected out due to grouting pressure;
the calibrating device comprises a calibrating mechanism 7 consisting of a magnetic horizontal calibrator, wherein a base 73 of the calibrating mechanism 7 is a magnetic adsorption device, the steel casing is adsorbed on the surface of the steel casing when being buried, the calibrator is provided with a switch 71 consisting of a magnetic switch and a high-precision level 72 with four-directional scales, and the verticality of the steel casing can be dynamically observed and adjusted when being buried;
and the second to N sections of steel casings 9, wherein the second to N sections of steel casings 9 are welded with the groove of the steel casing of the front section step by step along with the downward burying of the steel casings to form a groove weld 8 until reaching the specified elevation.
The steel casing is buried at a designated elevation, the conventional grouting machine is connected with the grouting pipes 5, the grouting operations are synchronously and uniformly performed on the plurality of grouting pipes, and the grouting liquid adopts a quick setting material to achieve final setting within 10 minutes to form a stable impervious layer (namely a stable layer 23) and then the construction operation of the cast-in-situ bored pile in the weak stratum is performed.
In this embodiment, first, after a pile casing, that is, a pile foundation center is measured and positioned, a steel pile casing is assisted by a hydraulic hammer, a vibratory hammer, and other conventional mechanical devices to perform insertion driving or embedding.
In this embodiment, next, a magnetic horizontal calibrator is installed on the top outer edge of the first section of steel casing, the initial installation state is adjusted to be horizontal, and the perpendicularity and stability of the whole device are dynamically monitored in the process of embedding the steel casing. Meanwhile, a rubber water stop ball and a high-pressure grouting pipe with enough length are installed before the pile casing is buried, the tightness and firmness are ensured, and the inspection is carried out before the steel pile casing is buried formally.
And thirdly, along with the placement of the first section of steel casing, embedding, gradually assembling and welding second-N sections of steel casings, and keeping the magnetic horizontal calibrator at the position of the steel casing close to the top all the time.
And finally, embedding the steel casing at a specified elevation, connecting a high-pressure grouting pipe by a conventional grouting machine, configuring sufficient grouting liquid, calculating grouting pressure according to the conditions of the underground water level of the soil layer distribution and the like, synchronously and uniformly grouting by a plurality of grouting pipes, strictly observing a magnetic horizontal calibrator, performing real-time auxiliary angle and direction adjustment, ensuring the verticality of the whole device, stopping grouting when the design pressure is reached and the pressure is stabilized for more than 5 minutes, and performing drilling and grouting pile construction operation in a weak stratum after the grouting liquid reaches a final setting within 10 minutes by adopting a quick setting material to form a stable impervious layer.
Still include to combining the introduction of cutting blade foot cutting soil layer, specifically do:
cutting 2 tip of sword foot sets up the cutting tooth mouth, and the steel protects a hammering, static pressure or vibration and more is favorable to advancing in the soil layer when burying underground for the operating efficiency is higher.
The table board 21 at the top of the cutting edge foot has a certain width, so that the upper steel pile casing can be effectively isolated from contacting with peripheral soil layers, and air or thixotropic slurry can be injected into the gap for circulation so as to reduce the friction resistance of downward insertion and burying.
In the embodiment, the grouting opening 4 is positioned on the table surface 21 at the top of the beveling blade foot, a plurality of channels (namely the pressure launder 3 for grouting liquid) are vertically formed at the beveling part downwards by the grouting opening 4, the number and the diameter of the channels are comprehensively determined according to the conditions of the diameter of the steel casing, the grouting pressure, the soil layer property, the underground water distribution state and the like, and the pressure launder 3 for grouting liquid has the function of assisting in cutting the soil layer.
The base 71 of the calibrating mechanism 7 formed by the magnetic horizontal calibrator is a magnetic adsorption device, the steel pile casing is adsorbed on the surface of the steel pile casing when being buried, the calibrator is provided with a switch 71 formed by a magnetic switch and a level gauge 72 with four-way scales, the verticality of the steel pile casing can be dynamically observed and adjusted when a soil layer is buried and cut, and further, the calibration by using instruments such as a laser collimator or a total station instrument can be considered.
And the second to N sections of steel protecting cylinders 9 are embedded downwards along with the steel protecting cylinders and are welded with the grooves of the front sections of steel protecting cylinders step by step until the steel protecting cylinders reach the specified elevation.
In this embodiment, the first section of steel protects a section of thick bamboo and each section of steel of upper portion and protects a section of thick bamboo center and be in same straight line, and then can guarantee the straightness that hangs down of whole section of thick bamboo that protects. Specifically, N is a natural number of 3 or more.
In this embodiment, the core of the grouting operation is as follows:
referring to the attached figure 1, the grouting opening 4 is positioned on a table surface 21 at the top of the beveling blade foot, a plurality of channels, namely a pressing flow groove 3 of grouting liquid, are vertically formed downwards on the beveling part of the grouting opening 4, and the number and the diameter of the channels are comprehensively determined according to the conditions of the diameter of the steel casing, the grouting pressure, the soil property, the underground water distribution state and the like.
Preferably, the grouting ports 4 are located on the top table surface 21 of the beveled cutting edge foot, only one grouting port is arranged, an annular hollow flow channel is formed inside the cutting edge foot 2 through the grouting ports 4, and enough grout overflow ports are reserved on the channel so that grouting liquid can effectively and fully reinforce soil around the steel casing.
In this embodiment, adopt comparatively common rubber stagnant water ball 6, set up in the 3 passageway bottoms in pressure flow groove, reach the assigned position slip casting back at the steel casing, because the ejecting pressure flow notch of slip casting pressure, rubber stagnant water ball 3 can replace with other materials such as polymer plugging material, cork or chance water inflation thing.
In this embodiment, the grouting pipe 5 is a pressure-bearing pipe with a certain length, can extend to the top surface of the pile foundation construction to be connected with a grouting instrument, and has a certain shaping adjustable angle and direction, so that the flexibility of grouting operation is realized.
Furthermore, the grouting liquid is double-fast cement slurry, water glass-cement double slurry or polyurethane, and the grouting liquid is consolidated with surrounding soil layers to form a stable layer 23 of a stable and closed impermeable layer, which is beneficial to the stability and verticality of the steel casing.
In the embodiment, the grouting liquid in the grouting operation is subjected to the bored pile construction operation after the grouting liquid reaches the stable layer 23 which is finally solidified to form a stable impervious layer within 10 minutes by adopting a quick-setting material, so that the perpendicularity can be effectively ensured, a certain water head height is formed in the steel casing, the completion of the quality and quantity maintenance of the pile foundation construction in a weak stratum is facilitated, and the quality safety risk is reduced.
According to the above work:
a steel pile casing device for soft stratum pile foundation construction comprises a first section of steel pile casing main body 1, a calibrating mechanism 7 formed by a magnetic horizontal calibrator is installed on the edge, close to the outer edge of the top, of the first section of steel pile casing main body, the initial installation state is adjusted to be horizontal, a rubber water stop ball 6 and a grouting pipe 5 with enough length are installed at the same time, the first section of steel pile casing main body 1 is buried in the steel pile casing main body, second-N sections of steel pile casings are gradually assembled and welded, the magnetic horizontal calibrator is dynamically adjusted to be always kept at the position, close to the top, of the steel pile casing, when the steel pile casing is buried at a specified elevation, a conventional grouting machine is connected with a high-pressure grouting pipe, sufficient grouting liquid is configured, grouting pressure is calculated according to the conditions of the underground water level of soil layer distribution, grouting operation is synchronously and uniformly performed by a plurality of grouting pipes, the magnetic horizontal calibrator is strictly observed, angle and direction adjustment are assisted in real time, the verticality of the whole device is guaranteed, grouting operation is stopped when grouting liquid reaches the design pressure and grouting liquid reaches the pressure is stabilized for more than 5 minutes, and grouting operation is performed after a fast setting material is adopted within 10 minutes to form a watertight grouting layer.
In this embodiment, the first section of steel casing main body may be formed by splicing and riveting a standard steel casing with a certain length and a front end steel cutting edge or by connecting the steel casing with the front end steel cutting edge in other forms.
Furthermore, the end parts of the cutting edge feet are provided with cutting tooth openings, so that the steel casing is more beneficial to advancing in the soil layer when being hammered, statically pressed or vibrated to be buried.
Furthermore, the grouting port is positioned on the top table surface of the cutting edge foot, a plurality of channels, namely grouting hydraulic flow grooves, are vertically formed downwards at the inclined cutting part of the grouting port, and the number and the diameter of the channels are comprehensively determined according to the conditions of the diameter of the steel casing, the grouting pressure, the soil layer property, the underground water distribution state and the like.
Furthermore, rubber stagnant water ball sets up in slip casting hydraulic pressure chute passageway bottom, after the steel protects a section of thick bamboo and reaches the assigned position slip casting, because slip casting pressure liftout pressure flow notch, rubber stagnant water ball can be replaced with other materials such as polymer plugging material, cork or chance water inflation thing.
Furthermore, the base of the magnetic horizontal calibrator is a powerful magnetic adsorption device or a conventional mechanical anchor bolt device, and is provided with a magnetic switch or a buckle, so that the magnetic horizontal calibrator can be firmly adsorbed on the surface of the steel casing.
Furthermore, a high-precision level gauge with four-direction scales or a conventional mechanical horizontal calibration device is arranged on the horizontal plane at the top of the magnetic horizontal calibrator, so that the verticality of the multi-section steel casing can be dynamically observed and adjusted when the steel casing is buried, and the calibration of instruments such as a laser collimator or a total station can be considered.
Further, the lengths of the second to N sections of steel casing are comprehensively determined according to the integral embedding depth of the casing, the welding operation environment and other conditions.
To sum up, the utility model discloses in, the first section steel protects a cutting foot and realizes the holistic operation of burying underground effectively of a steel casing through effectively cutting weak stratum to through closely observing magnetic force horizontal calibrator and carrying out real-time auxiliary adjustment angle and direction, guarantee whole straightness that hangs down that protects a device, treat that the steel casing buries underground appointed elevation department and carries out the slip casting operation, the slip casting forms and helps forming certain flood head height in the steel casing behind the firm impervious bed, greatly reduce the quality safety risk of drilling bored concrete pile construction operation in weak stratum.
The device can be assembled and integrally customized according to needs, is fast and convenient to process, is low in cost, can be produced in a standardized factory, and has high application value.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A steel casing device for weak stratum pile foundation construction is used for a first section of steel casing at the bottommost part and is characterized by comprising,
the steel pile casing comprises a first section of steel pile casing main body, a second section of steel pile casing main body and a third section of steel pile casing main body, wherein one end of the first section of steel pile casing main body forms a construction end, and the other end of the first section of steel pile casing main body forms a connecting end;
the cutting edge foot comprises a sleeve which is obliquely arranged with the periphery of the first section of steel casing main body, the sleeve is sleeved at the end part of the first section of steel casing main body, and an included angle is formed between the sleeve and the first section of steel casing main body;
the cutting edge leg is far away from the construction end of the first section of steel casing main body to form a table top with a width;
the grouting port is formed in the width direction of the table board and forms a pressure flow groove along the direction of the sleeve towards the construction end of the first section of steel casing main body;
the calibrating mechanism is located on the outer wall of the first section of steel casing main body and used for monitoring the verticality of the first section of steel casing main body in real time.
2. The steel casing device for the pile foundation construction of the weak stratum according to claim 1, wherein the first section of steel casing main body is assembled by steel plates, and the sleeve is integrally arranged on the first section of steel casing main body.
3. The steel casing device for soft stratum pile foundation construction according to claim 2, wherein an included angle formed by the sleeve and the first section steel casing main body is an acute angle, and the angle of the acute angle is 30-60 degrees.
4. The steel casing device for the construction of the pile foundation of the weak stratum according to claim 2, wherein the sleeve is provided with a cutting tooth opening at the periphery, and a sharp part of the cutting tooth opening is arranged towards the construction end of the first section of steel casing main body.
5. The steel casing device for soft stratum pile foundation construction according to claim 1, wherein the number of the grouting ports is multiple, and the plurality of the grouting ports are annularly arranged on the table top.
6. The steel casing device for weak stratum pile foundation construction according to claim 1, further comprising a stabilizing layer formed by pouring, wherein the thickness of the stabilizing layer is far greater than that of the sleeve.
7. The steel casing device for weak stratum pile foundation construction according to claim 1, further comprising a rubber water stop ball, wherein the rubber water stop ball is arranged in the pressure flow groove.
8. The steel casing device for weak stratum pile foundation construction according to claim 1, wherein the pressure flow groove is a vertical structure in the cutting edge foot.
9. The steel casing device for pile foundation construction in soft stratum of claim 1, wherein the calibration mechanism comprises a base, the base is a magnetic attraction structure, and the magnetic attraction structure is magnetically connected with the outer wall of the first section steel casing main body.
10. The steel casing device for soft stratum pile foundation construction according to claim 9, wherein the calibration mechanism further comprises a level gauge vertically arranged with respect to the base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221465059.4U CN218346168U (en) | 2022-06-13 | 2022-06-13 | Steel casing device for pile foundation construction of weak stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221465059.4U CN218346168U (en) | 2022-06-13 | 2022-06-13 | Steel casing device for pile foundation construction of weak stratum |
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| CN218346168U true CN218346168U (en) | 2023-01-20 |
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| CN202221465059.4U Active CN218346168U (en) | 2022-06-13 | 2022-06-13 | Steel casing device for pile foundation construction of weak stratum |
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| Country | Link |
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| CN (1) | CN218346168U (en) |
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