CN112160333A - Composite curtain pile construction drilling tool and construction method thereof - Google Patents
Composite curtain pile construction drilling tool and construction method thereof Download PDFInfo
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- CN112160333A CN112160333A CN202011135864.6A CN202011135864A CN112160333A CN 112160333 A CN112160333 A CN 112160333A CN 202011135864 A CN202011135864 A CN 202011135864A CN 112160333 A CN112160333 A CN 112160333A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a composite curtain pile construction drilling tool and a construction method thereof, which relate to the technical field of building foundation construction and comprise a stirring mechanism and a fixed-spraying mechanism; the stirring mechanism comprises a stirring rod and a blade assembly connected to the bottom end of the stirring rod; the rotatable connection of puddler is at the center of spouting the mechanism surely, it includes pipeline and shower nozzle surely to spout the mechanism, its height is greater than the height of blade subassembly, be equipped with out the thick liquid mouth on the shower nozzle, the shower nozzle with distance between the center of puddler is less than the radius of rotation of blade subassembly, the puddler drives the blade subassembly and rotates, high-pressure consolidation material from a thick liquid mouth blowout cutting soil body form surpass the blade subassembly radius of rotation's side direction consolidation body structure and with a fender pile overlap joint, part consolidation material passes through the blade subassembly stirring and forms the circular shape consolidation body, two kinds of consolidation bodies overlap joint each other, solve the cement mixing pile can't with a fender pile overlap joint again solve the problem of spouting consolidation body central authorities weak surely, and save material, high work efficiency, and convenient construction.
Description
Technical Field
The invention relates to the technical field of building foundation construction, in particular to a composite curtain pile construction drilling tool and a construction method thereof.
Background
The water interception curtain is an important structural measure in the field of foundation pit underground water control. The most common forms of the current water interception curtains are cement soil mixing piles, high-pressure rotary spraying piles and high-pressure fixed spraying and swinging spraying curtains.
The cement-soil mixing pile is formed by injecting cement paste prepared in advance into a hole, and forcibly mixing the cement paste with surrounding soft soil by rotating a mixing blade to form a cement reinforcing body. Its advantages are simple construction, low cost and high pile-forming quality. However, for the foundation pit supported by the pile anchor, the overlapping of the curtain pile and the supporting pile cannot be realized due to the collision of the stirring blade and the concrete supporting pile, and only one circle of cement-soil stirring pile curtain can be additionally constructed on the periphery of the supporting pile, so that the waste of materials and the waste of the construction period are caused.
The high-pressure jet grouting pile is characterized in that cement slurry is sprayed into a soil layer through a high-pressure rotating nozzle, and a soil body is cut through high-pressure jet flow, so that the cement slurry and the soil body are mixed to form a continuously lapped cement reinforcing body. Its advantages are less occupied ground, less vibration, low noise and high adaptability to stratum. When the curtain between piles is used for supporting the foundation pit pile anchor, the high-pressure jet flow of the curtain can wash the surface of a pile body when passing through the hard concrete supporting pile, so that the cement-soil pile and the supporting pile form effective lap joint, and the curtain has excellent applicability. But because the high-pressure jet flow has huge pulp output, the waste is serious, the cost is higher, and the environment is easily polluted.
The high-pressure fixed-spraying and swinging-spraying curtain is only used for preventing a drill bit from rotating or swinging within a certain angle range in the drill lifting process, so that a fan-shaped consolidation body with mutually connected vertexes is formed. The curtain form improves the defect of slurry waste of the jet grouting curtain pile to a certain extent due to small wall forming thickness. However, no matter the high-pressure fixed-spraying and swing-spraying curtains are formed by splicing the wall bodies in a fan shape, the thickness of the vertex of the fan shape is extremely small, and the water intercepting effect of the curtains is greatly reduced.
Disclosure of Invention
The invention aims to provide a composite curtain pile construction drilling tool and a construction method thereof, which are used for solving the technical problems that the construction of the existing cement soil mixing pile is limited, and materials are wasted due to high-pressure jet grouting piles, a high-pressure fixed-jet and swing-jet curtain wall body is formed by splicing sectors, the thickness of the vertex of the sector is extremely small, and the water interception effect of a curtain is greatly reduced.
The invention provides a composite curtain pile construction drilling tool, which comprises a stirring mechanism and a fixed-spraying mechanism; the stirring mechanism comprises a stirring rod and a blade assembly connected to the bottom end of the stirring rod;
the stirring rod is rotatably connected to the center of the fixed spraying mechanism and can move up and down along with the fixed spraying mechanism;
decide to spout the mechanism and include pipeline and shower nozzle, the shower nozzle is connected pipeline's bottom, the height of shower nozzle is greater than the height of blade subassembly, it keeps away from to be equipped with the jet direction on the shower nozzle the play thick liquid mouth of puddler, the shower nozzle with distance between the center of puddler is less than the radius of rotation of blade subassembly.
Further, the number of the spray heads is two.
Furthermore, along the circumference of the stirring rod, the included angle between the two spray heads is adjustable.
Furthermore, the number of the slurry outlets on each spray head is multiple, and the slurry outlets are arranged at intervals along the length direction of the spray head.
Furthermore, the number of the slurry outlets on each spray head is two, the projections of the extension directions of the two slurry outlets in a plane perpendicular to the length direction of the stirring rod are not overlapped, and the spraying paths of the two slurry outlets intersect outside the rotating radius of the blade assembly.
Furthermore, a first rotating assembly is arranged at the joint of the stirring rod and the fixed spraying mechanism;
the first rotating assembly comprises a fixed bearing, the stirring rod is connected in an inner ring of the fixed bearing, and the fixed spraying mechanism is connected with an outer ring of the fixed bearing.
Furthermore, the fixed bearing device further comprises a sleeve, the inner side wall of the sleeve is connected with the outer ring of the fixed bearing, and the fixed spraying mechanism is connected with the outer side wall of the sleeve.
Furthermore, the fixed spray mechanism also comprises a connecting rod and a high spray pipe; one end of the connecting rod is connected with the outer ring of the fixed bearing, the other end of the connecting rod is connected with the high spray pipe, the spray head is connected to the bottom end of the high spray pipe, and the conveying pipeline is arranged in the high spray pipe;
the extending direction of the high spray pipe is the same as the extending direction of the stirring rod.
Further, rabbling mechanism still includes actuating mechanism, actuating mechanism with the puddler is kept away from the one end of blade subassembly is connected, is used for the drive the puddler with the blade subassembly rotates.
The invention provides a construction method of a composite curtain pile construction drilling tool, which comprises the following steps:
measuring and paying off between two adjacent supporting piles to determine the position of the composite curtain pile and installing a composite curtain pile construction drilling tool;
a stirring rod of the stirring mechanism drives the blade assembly to rotate, water or consolidation materials are introduced into a conveying pipeline of the fixed-spraying mechanism, and the composite curtain pile construction drilling tool moves from top to bottom to a preset depth;
and (4) introducing a consolidation material into the conveying pipeline of the fixed-spraying mechanism, and lifting the composite curtain pile construction drilling tool to a preset elevation from a preset depth.
The invention provides a composite curtain pile construction drilling tool, which comprises a stirring mechanism and a fixed-spraying mechanism; the stirring mechanism comprises a stirring rod and a blade assembly connected to the bottom end of the stirring rod, the stirring rod is rotatably connected to the center of the fixed-spraying mechanism, and the stirring rod can move up and down along with the fixed-spraying mechanism; decide to spout the mechanism and include pipeline and shower nozzle, the shower nozzle is connected pipeline's bottom, the height of shower nozzle is greater than the height of blade subassembly, it keeps away from to be equipped with the jet direction on the shower nozzle the play thick liquid mouth of puddler, the shower nozzle with distance between the center of puddler is less than the radius of rotation of blade subassembly.
When the device is used, the position of the composite curtain pile is determined by measuring and paying off between two adjacent support piles, a composite curtain pile construction drilling tool is installed, the stirring mechanism and the fixed-spraying mechanism move from top to bottom simultaneously, the stirring rod drives the blade assembly to rotate together, meanwhile, consolidation materials such as cement paste are introduced into a conveying pipeline of the fixed-spraying mechanism, the consolidation materials are sprayed out from a slurry outlet of a spray head, when the introduced consolidation materials are in a high-pressure state, soil can be cut to form a lateral consolidation body structure exceeding the rotating radius of the blade assembly, the consolidation body structure is used for being lapped with the support piles, meanwhile, part of the consolidation materials are stirred by the blade assembly of the stirring mechanism to form a circular consolidation body, the two consolidation bodies can be lapped with each other, so that the composite curtain pile is formed, the problem that the existing cement soil stirring pile cannot be lapped with the support piles is solved, and the problem that the center of the fixed-spraying consolidation body is weak is solved, almost no waste slurry is generated, materials are saved, the working efficiency is high, the construction is convenient, and the construction period is shortened.
The invention provides a construction method of a composite curtain pile construction drilling tool, which comprises the following steps: measuring and paying off between two adjacent supporting piles to determine the position of the composite curtain pile and installing a composite curtain pile construction drilling tool; a stirring rod of the stirring mechanism drives the blade assembly to rotate, water or consolidation materials are introduced into a conveying pipeline of the fixed-spraying mechanism, and the composite curtain pile construction drilling tool moves from top to bottom to a preset depth; and (4) introducing a consolidation material into the conveying pipeline of the fixed-spraying mechanism, and lifting the composite curtain pile construction drilling tool to a preset elevation from a preset depth.
When the composite curtain pile construction drilling tool moves to a preset depth from top to bottom, a stirring rod of a stirring mechanism drives a moving blade assembly to rotate, and meanwhile, low-pressure or high-pressure water and low-pressure or high-pressure consolidation materials are introduced into a conveying pipeline of a fixed spraying mechanism, then when the composite curtain pile construction drilling tool is lifted to a preset elevation from the preset depth, the consolidation materials are introduced into the conveying pipeline and the low-pressure or high-pressure consolidation materials are introduced, so that a circular consolidation body or a combination form of various lateral consolidation bodies and the circular consolidation body is formed, various complex working conditions are adapted, the working efficiency is high, the construction is convenient, and the construction period is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first configuration of a composite curtain pile construction drill provided in an embodiment of the present invention;
FIG. 2 is a schematic injection diagram of a grout outlet of a composite curtain pile construction drilling tool according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a second construction form of a composite curtain pile construction drilling tool according to an embodiment of the present invention;
fig. 6 is a structural diagram of a bidirectional fixed-jet mixing pile of the composite curtain pile construction drilling tool provided by the embodiment of the invention;
fig. 7 is a top view of a bidirectional fixed-jet mixing pile of the composite curtain pile construction drilling tool provided by the embodiment of the invention;
fig. 8 is a structural diagram of a one-way fixed-jet mixing pile of the composite curtain pile construction drilling tool provided by the embodiment of the invention;
fig. 9 is a structural view of a conventional mixing pile of the composite curtain pile construction drill provided in the embodiment of the present invention;
FIG. 10 is a schematic view of a first connection form of a bidirectional fixed-jet mixing pile and a support pile of the composite curtain pile construction drilling tool provided by the embodiment of the invention;
fig. 11 is a schematic view of a second connection form of a bidirectional fixed-jet mixing pile and a support pile of the composite curtain pile construction drilling tool provided by the embodiment of the invention;
fig. 12 is a flowchart of a construction method of a composite curtain pile construction drill according to an embodiment of the present invention.
Icon: 10-a circular consolidated body; 20-lateral consolidation body; 30-supporting piles; 111-a stirring rod; 112-a blade assembly; 120-fixed spraying mechanism; 121-high nozzle; 122-a connecting rod; 123-a spray head; 124-a pulp outlet; 130-fixed bearings; 131-sleeve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 11, the composite curtain pile construction drilling tool provided by the present embodiment includes a stirring mechanism and a fixed-jet mechanism 120; the stirring mechanism comprises a stirring rod 111 and a blade assembly 112 connected to the bottom end of the stirring rod 111; the stirring rod 111 is rotatably connected to the center of the fixed spraying mechanism 120, and the stirring rod 111 can move up and down along with the fixed spraying mechanism 120; the fixed spraying mechanism 120 comprises a conveying pipeline and a spray head 123, the spray head 123 is connected to the bottom of the conveying pipeline, the height of the spray head 123 is greater than that of the blade assembly 112, the spray head 123 is provided with a slurry outlet 124, the spraying direction of which is far away from the stirring rod 111, and the distance between the spray head 123 and the center of the stirring rod 111 is smaller than the rotating radius of the blade assembly 112.
In the present embodiment, the orientation of the slurry outlet 124 may be in a direction away from the stirring rod 111 or in another direction, but it is necessary to avoid the direction toward the stirring rod 111.
When the device is used, the position of the composite curtain pile is determined by measuring and paying off between two adjacent support piles 30, a composite curtain pile construction drilling tool is installed, the stirring mechanism and the fixed-spraying mechanism 120 move from top to bottom simultaneously, the stirring rod 111 drives the blade assembly 112 to rotate together, meanwhile, a consolidation material, such as cement slurry, is introduced into a conveying pipeline of the fixed-spraying mechanism 120, the consolidation material is sprayed out from a slurry outlet 124 of a spray head 123, when the introduced consolidation material is in a high-pressure state, soil can be cut, a lateral consolidation body 20 structure exceeding the rotating radius of the blade assembly 112 is formed, the consolidation body structure is used for being lapped with the support piles 30, meanwhile, part of the consolidation material is stirred by the blade assembly 112 of the stirring mechanism to form a circular consolidation body 10, the two consolidation bodies can be lapped with each other, so as to form the composite curtain pile, and the problem that the existing cement soil stirring pile cannot be lapped with the support piles 30 is solved, the problem that the center of the fixed-spraying consolidation body is weak is solved, waste slurry is hardly generated, materials are saved, the working efficiency is high, the construction is convenient, and the construction period is shortened.
In this embodiment, the consolidation material is cement paste, but other consolidation materials that can be used for underground diaphragm walls are used instead.
Further, the number of the nozzles 123 is two, and the two nozzles 123 are spaced apart in the circumferential direction around the stirring rod 111.
In practical use, the stirring rod 111 drives the blade assembly 112 at the bottom thereof to rotate, the position of the fixed spraying mechanism 120 is always kept unchanged, one end of the conveying pipeline far away from the spray head 123 is connected with a high-pressure cement pump, when high-pressure cement slurry is ventilated to the conveying pipeline, the high-pressure cement slurry is sprayed out from the slurry outlet 124 of the spray head 123 to cut soil, a fan-shaped cement solidification body exceeding the turning radius of the blade assembly 112 is formed, part of the cement paste is stirred by the blade component 112 of the stirring mechanism to form a circular cement concretion with the soil body, the two cement concretions are mutually lapped to form a composite curtain pile, the composite curtain pile is a bidirectional fixed-spraying stirring pile, one end of one fan-shaped cement consolidation body, which is far away from the circular cement consolidation body, is used for being lapped with one supporting pile 30, and the other end of the other fan-shaped cement consolidation body, which is far away from the circular cement consolidation body, is used for being lapped with the other supporting pile 30.
It should be noted that, high-pressure cement slurry may be introduced into one nozzle 123, and low-pressure or no-flow cement slurry may be introduced into the other nozzle 123, at this time, only one circular cement solidification body and one fan-shaped cement solidification body overlapped with the circular cement solidification body are formed, and the fan-shaped cement solidification body is located at one side of the circular cement solidification body, i.e. the unidirectional fixed-jet mixing pile is formed.
Of course, it is also possible to introduce low-pressure cement slurry into both nozzles 123, and then only one round cement solidification body is formed, i.e. a conventional mixing pile is formed.
During the in-service use, the above-mentioned three kinds of stirring stake formation that form through compound curtain stake construction drilling tool can make up the use wantonly to be fit for different complicated operating modes.
Further, the number of the slurry outlets 124 on each nozzle 123 is plural, and the plural slurry outlets 124 are arranged at intervals along the length direction of the nozzle 123.
Specifically, in the present embodiment, each nozzle 123 is provided with two slurry outlets 124, and the two slurry outlets 124 are arranged along the length direction of the nozzle 123, i.e., the vertical direction.
In this embodiment, the end of the nozzle 123 facing the blade assembly 112 is tapered, and the portion having a smaller tapered size faces the blade assembly 112, so that the movement resistance is reduced when the composite curtain pile constructing drill moves from top to bottom.
Further, there are two slurry outlets 124 on each spray head 123, projections of extension directions of the two slurry outlets 124 in a plane perpendicular to a length direction of the stirring rod 111 do not coincide, and spray paths of the two slurry outlets 124 intersect outside a rotation radius of the blade assembly 112.
Specifically, two grout outlets 124 on the shower nozzle 123 can be set up along vertical direction interval, but the extending direction of two grout outlets 124 is different, is certain angle arrangement promptly, and the grout of two grout outlets 124 spun intersects outside the radius of rotation of blade subassembly 112, and does not have the clearance, guarantees the leakproofness, simultaneously, can be through setting up so that the height of keeping away from the one end of grout outlet 124 of two grout outlets 124 spun grout is the same.
It should be noted that, because the two grout outlets 124 have different heights, a gap is inevitably formed in the grout sprayed from the positions close to the grout outlets 124, and because the distance from the nozzle 123 to the center of the stirring rod 111 is less than the rotation radius of the blade assembly 112, the gap is compensated by the circular cement solidification body formed by the stirring of the blade assembly 112, so as to form a sealed composite curtain pile structure.
Further, a first rotating assembly is arranged at the joint of the stirring rod 111 and the fixed spraying mechanism 120; the first rotating assembly comprises a fixed bearing 130, the stirring rod 111 is connected in an inner ring of the fixed bearing 130, and the fixed spraying mechanism 120 is connected with an outer ring of the fixed bearing 130.
It should be noted that, as shown in fig. 5, as another implementation form, the first rotating assembly further includes a sleeve 131, an inner side wall of the sleeve 131 is connected with an outer ring of the fixed bearing 130, and the fixed-spray mechanism 120 is connected with an outer side wall of the sleeve 131.
Preferably, in this embodiment, the fixed-spray mechanism 120 further includes a connecting rod 122 and a high-spray pipe 121; one end of the connecting rod 122 is connected with the outer ring of the fixed bearing 130, the other end of the connecting rod 122 is connected with the high spray pipe 121, the spray head 123 is connected to the bottom end of the high spray pipe 121, and the conveying pipeline is arranged in the high spray pipe 121; the high spray pipe 121 extends in the same direction as the stirring bar 111.
Specifically, the fixed spray mechanism 120 includes two high spray pipes 121, the extending direction of the high spray pipes 121 is the same as the extending direction of the stirring rod 111, each high spray pipe 121 is connected with the outer ring of the fixed bearing 130 through a connecting rod 122, the conveying pipeline is installed in the high spray pipe 121, and the spray head 123 is connected at the bottom end of the high spray pipe 121.
Further, one of the connecting rods 122 is connected to one side of the fixed bearing 130, and the other connecting rod 122 is connected to the other opposite side of the fixed bearing 130.
Specifically, two connecting rods 122 are respectively connected to both sides of the fixing bearing 130, so that one high spray pipe 121 and the nozzle 123 connected to the bottom of the high spray pipe 121 connected thereto are disposed opposite to the other high spray pipe 121 and the nozzle 123 connected to the bottom thereof, so that the directions of the grout ejected from the grout outlets 124 of the two nozzles 123 are opposite, and at this time, the composite curtain pile may be disposed between the two support piles 30, so that the fan-shaped cement concretion bodies formed by the grout ejected from the grout outlets 124 of the two nozzles 123 can be respectively overlapped with the two support piles 30.
Further, along the circumference of the stirring rod 111, the included angle between the two spray heads 123 is adjustable.
Preferably, an included angle between the two connecting rods 122 is adjustable along the circumferential direction of the fixing bearing 130, so that the included angle between the extending directions of the cement paste sprayed from the grout outlets 124 of the two nozzles 123 is variable, and the composite curtain pile can be arranged on one side of the connecting line between the two support piles 30, so that the arrangement position of the composite curtain pile is more flexible.
It should be noted that, in order to realize the adjustment of the included angle between the two connecting rods 122, a plurality of connecting portions may be disposed on the outer ring of the fixed bearing 130, one end of the connecting rod 122 far from the high nozzle 121 may be detachably connected to the connecting portion, and one of the connecting rods 122 is connected to a different connecting portion by detaching, so as to realize the adjustment of the angle between the two connecting rods 122.
It is also possible to arrange the outer race of the fixed bearing 130 in two parts that can rotate relatively at the center of the fixed bearing 130, wherein one connecting rod 122 is connected to one of the parts and the other connecting rod 122 is connected to the other part, and the adjustment of the angle between the two connecting rods 122 is achieved by the rotation between the two parts.
Further, the stirring mechanism further comprises a driving mechanism, and the driving mechanism is connected with one end of the stirring rod 111, which is far away from the blade assembly 112, and is used for driving the stirring rod 111 and the blade assembly 112 to rotate.
This implementation provides a composite curtain stake construction drilling tool has following advantage:
1. the high-pressure fixed-spraying is combined with the stirring pile, the problem that the cement-soil stirring pile cannot be lapped with the supporting pile 30 is solved by the fixed-spraying, and the problem that the center of a fixed-spraying consolidation body is weak is solved by the stirring pile;
2. the cement slurry returned by the fixed spraying is directly used for stirring to form a circular cement solidification body, so that waste slurry is hardly generated, and materials are saved.
3. The stirring rod 111 and the blade assembly 112 and the spray head 123 can move up and down synchronously and rotate independently from each other, and the stirring speed can be adjusted randomly as required during fixed spraying.
4. By changing the position of the high nozzles 121, the number and direction of the slurry outlets 124, the size of the blade assembly 112 and the slurry outlet form of the high nozzles 121, various combinations of fan-shaped cement concretes and circular cement concretes can be formed to adapt to various complex working conditions.
5. The high-pressure fixed-spraying and stirring synchronous construction has the advantages of high working efficiency, convenience in construction and construction period saving.
As shown in fig. 12, the construction method of the composite curtain pile construction drilling tool provided in this embodiment depends on the composite curtain pile construction drilling tool, which specifically includes: measuring and paying off between two adjacent support piles 30 to determine the position of the composite curtain pile and installing a composite curtain pile construction drilling tool; a stirring rod 111 of the stirring mechanism drives a blade assembly 112 to rotate, water or consolidation materials are introduced into a conveying pipeline of the fixed-jet mechanism 120, and the composite curtain pile construction drilling tool moves from top to bottom to a preset depth; and (3) introducing a consolidation material into the conveying pipeline of the fixed-spraying mechanism 120, and lifting the composite curtain pile construction drilling tool to a preset elevation from a preset depth.
Specifically, according to the construction method of the composite curtain pile construction drilling tool provided by the invention, when the composite curtain pile construction drilling tool moves from top to bottom to a preset depth, the stirring rod 111 of the stirring mechanism drives the blade assembly 112 to rotate, and simultaneously, low-pressure or high-pressure water, low-pressure or high-pressure consolidation materials are introduced into the conveying pipeline of the fixed spraying mechanism 120, and then, when the composite curtain pile construction drilling tool is lifted to a preset elevation from the preset depth, the consolidation materials are introduced into the conveying pipeline, and the low-pressure or high-pressure consolidation materials are introduced into the conveying pipeline, so that a combination form of the circular consolidation body 10 or a plurality of lateral consolidation bodies 20 and the circular consolidation body 10 is formed, and the construction method is suitable for various complicated working conditions, high in working efficiency, convenient to construct, and capable of saving the.
Specifically, the construction method of the composite curtain pile construction drilling tool provided by the embodiment can form three single pile sections, namely a bidirectional fixed-jet stirring pile, a unidirectional fixed-jet stirring pile and a conventional stirring pile.
The construction method of the bidirectional fixed-spraying stirring pile comprises the following steps: firstly, measuring and setting-out between two adjacent support piles 30 to determine the position of a composite curtain pile and installing a composite curtain pile construction drilling tool, secondly, driving a blade assembly 112 to rotate and sink by a stirring rod 111, and meanwhile, bidirectionally jetting low-pressure or high-pressure water, low-pressure or high-pressure cement paste by two high spray rods; and finally, after the drilling tool sinks to the designed depth, spraying high-pressure cement slurry in two directions through the two high spray rods, simultaneously rotating the stirring rod 111 to lift the drilling tool to the designed elevation, and performing repeated stirring if necessary.
The construction method of the unidirectional fixed-spraying stirring pile comprises the following steps: firstly, measuring and setting-out between two adjacent support piles 30 to determine the position of a composite curtain pile and installing a composite curtain pile construction drilling tool, secondly, driving a blade assembly 112 to rotate and sink by a stirring rod 111, and meanwhile, bidirectionally jetting low-pressure water or low-pressure cement paste by two high spray rods; and finally, after the drilling tool sinks to the designed depth, high-pressure cement slurry is sprayed in a single direction through a high spray rod on one side which is preset, the stirring rod 111 is rotated to lift the drilling tool to the designed elevation, and repeated stirring is carried out if necessary.
The construction method of the conventional mixing pile comprises the following steps: firstly, measuring and setting-out between two adjacent support piles 30 to determine the position of a composite curtain pile and installing a composite curtain pile construction drilling tool, secondly, driving a blade assembly 112 to rotate and sink by a stirring rod 111, and meanwhile, bidirectionally jetting low-pressure water or low-pressure cement paste by two high spray rods; and finally, after sinking to the designed depth, bidirectionally spraying low-pressure cement slurry through two high spray rods, simultaneously rotating the stirring rod 111 to lift the drilling tool to the designed elevation, and performing repeated stirring if necessary.
In summary, when the composite curtain pile construction drilling tool provided by the present invention is used, the position of the composite curtain pile is determined by measuring and setting-out lines between two adjacent support piles 30, and the composite curtain pile construction drilling tool is installed, the stirring mechanism and the fixed-jet mechanism 120 move from top to bottom at the same time, the blade assembly 112 is driven by the stirring rod 111 to rotate together, meanwhile, the consolidation material is introduced into the conveying pipeline of the fixed-jet mechanism 120, for example, the consolidation material is sprayed out from the slurry outlet 124 of the nozzle 123, when the introduced consolidation material is in a high pressure state, the soil body can be cut, a lateral consolidation body 20 structure exceeding the rotation radius of the blade assembly 112 is formed, the consolidation body structure is used for overlapping with the support piles 30, meanwhile, part of the consolidation material is stirred by the blade assembly 112 of the stirring mechanism to form a circular consolidation body 10, two consolidation bodies can be overlapped with each other, thereby forming the composite curtain pile, the problem that the existing cement-soil mixing pile cannot be lapped with the supporting pile 30 is solved, the problem that the center of a fixed-spraying consolidation body is weak is solved, waste slurry is hardly generated, materials are saved, the working efficiency is high, construction is convenient, and the construction period is shortened.
The construction method of the composite curtain pile construction drilling tool provided by the invention comprises the steps that when the composite curtain pile construction drilling tool moves to a preset depth from top to bottom, a stirring rod 111 of a stirring mechanism drives a blade assembly 112 to rotate, meanwhile, low-pressure or high-pressure water and low-pressure or high-pressure consolidation materials are introduced into a conveying pipeline of a fixed spraying mechanism 120, then, when the composite curtain pile construction drilling tool is lifted to a preset elevation from the preset depth, the consolidation materials are introduced into the conveying pipeline, and the low-pressure or high-pressure consolidation materials are introduced, so that a circular consolidation body 10 or a combination form of multiple lateral consolidation bodies 20 and the circular consolidation body 10 is formed, the working efficiency is high, the construction is convenient, and the construction period is saved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A composite curtain pile construction drilling tool is characterized by comprising a stirring mechanism and a fixed-spraying mechanism; the stirring mechanism comprises a stirring rod and a blade assembly connected to the bottom end of the stirring rod;
the stirring rod is rotatably connected to the center of the fixed spraying mechanism and can move up and down along with the fixed spraying mechanism;
decide to spout the mechanism and include pipeline and shower nozzle, the shower nozzle is connected pipeline's bottom, the height of shower nozzle is greater than the height of blade subassembly, it keeps away from to be equipped with the jet direction on the shower nozzle the play thick liquid mouth of puddler, the shower nozzle with distance between the center of puddler is less than the radius of rotation of blade subassembly.
2. The composite curtain pile construction drilling tool according to claim 1, wherein the number of the nozzles is two.
3. The composite curtain pile construction drilling tool according to claim 2, wherein an angle between the two nozzles is adjustable in a circumferential direction of the agitating bar.
4. The composite curtain pile construction drilling tool according to claim 2, wherein the number of the grout outlet on each of the nozzles is plural, and the plural grout outlets are provided at intervals in a length direction of the nozzles.
5. The composite curtain pile construction drilling tool according to claim 4, wherein the number of the slurry outlets on each nozzle is two, projections of extension directions of the two slurry outlets in a plane perpendicular to a length direction of the stirring rod do not coincide, and injection paths of the two slurry outlets intersect outside a rotation radius of the blade assembly.
6. The composite curtain pile construction drilling tool according to claim 1, wherein a first rotating assembly is provided at a junction of the stirring rod and the jet grouting mechanism;
the first rotating assembly comprises a fixed bearing, the stirring rod is connected in an inner ring of the fixed bearing, and the fixed spraying mechanism is connected with an outer ring of the fixed bearing.
7. The composite curtain pile construction drilling tool according to claim 6, further comprising a sleeve, wherein the inner side wall of the sleeve is connected with the outer ring of the fixed bearing, and the jet control mechanism is connected with the outer side wall of the sleeve.
8. The composite curtain pile construction drilling tool according to claim 6, wherein the fixed-jet mechanism further comprises a connecting rod and a high-jet pipe; one end of the connecting rod is connected with the outer ring of the fixed bearing, the other end of the connecting rod is connected with the high spray pipe, the spray head is connected to the bottom end of the high spray pipe, and the conveying pipeline is arranged in the high spray pipe;
the extending direction of the high spray pipe is the same as the extending direction of the stirring rod.
9. The composite drapery pile construction drilling tool of claim 1, wherein the stirring mechanism further comprises a driving mechanism connected to an end of the stirring rod remote from the blade assembly for driving the stirring rod and the blade assembly to rotate.
10. A construction method of a composite curtain pile construction drilling tool is characterized by comprising the following steps:
measuring and paying off between two adjacent supporting piles to determine the position of the composite curtain pile and installing a composite curtain pile construction drilling tool;
a stirring rod of the stirring mechanism drives the blade assembly to rotate, water or consolidation materials are introduced into a conveying pipeline of the fixed-spraying mechanism, and the composite curtain pile construction drilling tool moves from top to bottom to a preset depth;
and (4) introducing a consolidation material into the conveying pipeline of the fixed-spraying mechanism, and lifting the composite curtain pile construction drilling tool to a preset elevation from a preset depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011135864.6A CN112160333A (en) | 2020-10-21 | 2020-10-21 | Composite curtain pile construction drilling tool and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135864.6A CN112160333A (en) | 2020-10-21 | 2020-10-21 | Composite curtain pile construction drilling tool and construction method thereof |
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| CN112160333A true CN112160333A (en) | 2021-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107370A (en) * | 2021-04-13 | 2021-07-13 | 山东建勘集团有限公司 | Drilling tool for cement-soil mixing pile between rigid piles and using method thereof |
-
2020
- 2020-10-21 CN CN202011135864.6A patent/CN112160333A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107370A (en) * | 2021-04-13 | 2021-07-13 | 山东建勘集团有限公司 | Drilling tool for cement-soil mixing pile between rigid piles and using method thereof |
| CN113107370B (en) * | 2021-04-13 | 2022-09-20 | 山东建勘集团有限公司 | Drilling tool for cement-soil mixing pile between rigid piles and using method thereof |
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