CN210315529U - Self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod - Google Patents
Self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod Download PDFInfo
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- CN210315529U CN210315529U CN201920764204.0U CN201920764204U CN210315529U CN 210315529 U CN210315529 U CN 210315529U CN 201920764204 U CN201920764204 U CN 201920764204U CN 210315529 U CN210315529 U CN 210315529U
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Abstract
The utility model relates to a from drilling high pressure jet grouting bag slip casting and expanding anti-floating anchor rod, its characterized in that: comprises an anchor rod, a drill bit, a bag expanding body, a grouting pipe and cement paste stirring soil; the bottom end of the anchor rod is fixed with the axis of the drill bit, and the grouting pipe is bound on the anchor rod through a steel wire; the cement paste mixing soil is distributed on the outer rings of the drill bit and the anchor rod and comprises anchoring section cement mixing soil and non-anchoring section cement mixing soil; the bag expanding body is positioned in the cement mixing soil of the anchoring section and comprises an upper sealing body, a lower sealing body, a bag and grouting bodies, wherein the upper opening and the lower opening of the bag are respectively connected and sealed with the upper sealing body and the lower sealing body, the bottom end of the grouting pipe penetrates through the upper sealing body and extends into the bag, and the grouting bodies are filled in the bag through the grouting pipe. The utility model feeds the anchor rod into the soil body when the drill rod drills down, thereby avoiding the defect that the hole wall is easy to collapse after the hole forming process; the construction steps are optimized and reduced, and the construction efficiency is improved; the anchor rod construction quality is easy to guarantee and control, and the anchor rod bearing capacity is improved.
Description
Technical Field
The utility model belongs to the technical field of anti-floating anchor rod, especially, relate to a from drilling high pressure jet grouting bag slip casting and expanding anti-floating anchor rod.
Background
The anti-floating anchor rod transfers load to the surrounding rock-soil layer through tight friction and interlocking between the rod body and the anchoring support layer to provide structural anti-floating force, and is widely applied to underground engineering of buildings with higher underground water level and strict anti-floating requirement. At present, in order to improve the anti-buoyancy, a drilling machine is generally adopted to perform hole forming and then combined with the diameter expanding construction of an anchoring section, then an anchor rod is put down and grouted, and the specific construction method is as disclosed in the invention patent with the application number of 201510426490.6, and the steps are as follows: 1. leveling the field; 2. assembling and debugging equipment; 3. measuring and setting and positioning a drilling machine; 4. drilling down to form a hole; 5. carrying out high-pressure rotary jet reaming; 6. manufacturing an assembled multiple anti-corrosion type expanded anchor rod and placing the anchor rod; 7. grouting cement slurry into the bag; 8. grouting in the anchor hole; 9. constructing a foundation slab; 10. and locking the anti-floating anchor rod.
The anti-floating anchor rod formed by the conventional construction method has the following defects: the construction process is complicated, hole forming in a soft soil layer or a sandy soil layer easily causes hole wall collapse or necking, the hole expanding effect is poor, the grouting discreteness is large, the quality after slurry forming is difficult to guarantee, and therefore the anti-floating bearing capacity of the anchor rod is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems existing in the construction process of the existing anti-floating anchor rod, and provides a self-drilling high-pressure rotary spraying bag grouting expanding anti-floating anchor rod.
In order to achieve the purpose, the utility model provides a technical scheme does:
the utility model relates to a self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod, which comprises an anchor rod, a drill bit, a bag expanding body, a grouting pipe and cement mixing soil; the bottom end of the anchor rod is fixed with the axis of the drill bit, and the grouting pipe is bound on the anchor rod through a steel wire; the cement mixing soil is distributed on the outer rings of the drill bit and the anchor rod and comprises anchoring section cement mixing soil of the lower half part and non-anchoring section cement mixing soil of the upper half part; the bag expanding body is located in cement mixing soil of the anchoring section and comprises an upper sealing body, a lower sealing body, a bag and a grouting body, the upper sealing body and the lower sealing body are fixed on the anchor rod at intervals, an upper opening and a lower opening of the bag are respectively connected with the upper sealing body and the lower sealing body and are sealed, the bottom end of the grouting pipe penetrates through the upper sealing body and extends into the bag, and the grouting expanding body is filled in the bag through grouting of the grouting pipe and extrudes and expands the bag outwards.
Preferably, the circumference of the upper sealing body and the lower sealing body is provided with an annular thread groove, the upper opening and the lower opening of the bag are bound outside the upper sealing body and the lower sealing body through a binding belt respectively, and the binding belt is embedded into the thread groove. The circumference of the upper sealing body and the lower sealing body is provided with annular thread grooves, which are helpful for sealing the upper opening and the lower opening of the bag and the upper sealing body and the lower sealing body, and when injecting grouting material into the bag, the grouting material is not easy to leak, and the expansion of the bag is facilitated.
Preferably, the axle center position of the upper portion of the drill bit is provided with an anchor bolt hole, a plurality of grout outlet holes are uniformly distributed around the anchor bolt hole, the outer side of the drill bit is provided with a drill bit external thread connected with a drill rod, and the bottom end of the anchor rod is screwed into the anchor bolt hole. The setting of drill bit external screw thread is used for threaded connection drilling rod, and the setting in grout outlet is when drilling the process for the drill bit, to pouring thick liquid in the drilling to flow out from grout outlet, the thick liquid mixes with the soil of cutting when the drill bit is rotatory and forms anchor section cement mixing soil and non-anchor section cement mixing soil.
Preferably, the bottom of the drill bit is provided with a plurality of steel ribs. The steel ribs are used for cutting soil.
Preferably, the stock include a plurality of stock monomers, the free tip of stock is equipped with the external screw thread, through the screw sleeve interconnect with external screw thread complex between the stock monomer. According to the design length of stock, can lengthen the stock at will, arrange more in a flexible way.
Preferably, the upper end of the grouting pipe is provided with a temporary plug, and the lower end of the grouting pipe is provided with a one-way check valve. The temporary plugging is used for plugging the grouting pipe before grouting body injection, so that sundries are prevented from entering the grouting pipe to cause plugging; the one-way check valve prevents the reverse flow and ejection of the grout injected into the bladder before it is hardened.
Preferably, the diameter of the cement mixing soil of the anchoring section is larger than that of the cement mixing soil of the non-anchoring section.
Preferably, the grouting pipe comprises a plurality of grouting pipe monomers which are sequentially connected from top to bottom, and the grouting pipe monomers are connected in a welding mode. The length of the grouting pipe is related to the length of the anchor rod and the arrangement depth of the bags, and the mode of lengthening the single grouting pipes is suitable for grouting construction of the bags with various embedding depths.
Preferably, the center of the upper sealing body is provided with an upper sealing body anchor rod hole, a grouting hole is arranged beside the upper sealing body anchor rod hole, and the center of the lower sealing body is provided with a lower sealing body anchor rod hole; the anchor rod sequentially penetrates through the anchor rod hole of the upper sealing body and the anchor rod hole of the lower sealing body, and the grouting pipe penetrates through the grouting hole.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
1. the anchor rod is synchronously sent to the specified position and depth in the drilling process of the drilling machine, so that the construction procedures are reduced, and the influence of hole collapse and necking on the quality of the anchor rod is reduced;
2. the body is expanded through the bag, and the hole expansion is not needed through a hole expanding machine, so that the operation is simple, the construction efficiency is high, and the construction period can be effectively shortened;
3. the bag can effectively reduce the dispersion of the mass of the grout and the solid mass caused by the disordered seepage of the grout, the pollution of underground water and the like, improve the quality of the anchor rod and reduce the pollution to the environment;
4. the position, the length and the diameter of the grouting body expanding pocket on the anchor rod can be conveniently adjusted according to geological conditions, and the better mechanical property of a hard stratum can be fully utilized to improve the anti-floating force of a single anchor rod;
5. by adopting the post-grouting body-expanding construction process, the bearing capacity of a single anchor rod is remarkably improved, and the length of the anchor rod and the number of the anchor rods can be shortened under the same bearing condition, so that the construction cost is greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of a self-drilling high-pressure rotary-jetting bladder grouting expanding anti-floating anchor rod;
FIG. 2 is a connection relationship diagram of the grout pipe, anchor rod, upper seal body and lower seal body;
FIG. 3 is a top view of the upper seal body;
FIG. 4 is a top view of the lower seal body;
FIG. 5 is a schematic view of the connection of the bladder to the upper and lower seals;
FIG. 6 is a schematic view of the construction of the drill bit;
FIG. 7 is a top view of the drill bit;
FIG. 8 is a bottom view of the drill bit;
FIG. 9 is a view of the connection of the drill bit to the anchor rod;
FIG. 10 is a schematic view of the bolt extension;
FIG. 11 is a schematic drawing of an extension of a grout pipe;
FIG. 12 is a schematic illustration of a bolt drilling process;
FIG. 13 is a schematic view of the process of pouring the slurry and squeezing out the bladder.
The figure is marked with: 1-anchor rod, 11-anchor rod monomer, 12-threaded sleeve, 2-upper sealing body, 21-upper sealing body anchor rod hole, 22-grouting hole, 23-threaded groove, 3-lower sealing body, 31-lower sealing body anchor rod hole, 4-grouting pipe, 41-one-way check valve, 42-temporary plugging, 43-steel wire, 44-grouting pipe monomer, 5-bag, 51-ribbon, 6-drill bit, 61-anchor rod bolt hole, 62-grout outlet, 63-drill bit external thread, 64-steel rib, 7-drill rod, 73-extension drill rod, 75-locking device, 8-cement paste, 81-anchoring section cement mixing soil, 82-non-anchoring section cement mixing soil, 9-high-pressure grouting pump, 91-grouting valve, 10-grouting enlarged body, 13-temporary fixing device.
Detailed Description
In order to deepen understanding of the present invention, the embodiments of the present invention will be described in detail below with reference to fig. 1 to 12, and the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments are given, but the scope of protection of the present invention is not limited to the following embodiments.
Combine the attached drawing 1, the utility model relates to a self-drilling high pressure jet grouting bag grouting expands anti-floating anchor rod of body includes stock 1, drill bit 6, bag enlarged body, slip casting pipe 4 and grout stirring soil. The bottom end of the anchor rod 1 is fixed with the axis of the drill bit 6, and the grouting pipe 4 is bound on the anchor rod 1 through a steel wire 43.
Referring to fig. 6-9, the upper axis of the drill bit 6 is provided with an anchor bolt hole 61, a plurality of slurry outlet holes 62 are uniformly distributed around the anchor bolt hole 61, the outer side of the drill bit 6 is provided with a drill bit external thread 63 connected with a drill rod, the bottom of the drill bit 6 is provided with a plurality of steel ribs 64, the bottom end of the anchor rod 1 is screwed into the anchor bolt hole 61, the drill bit external thread 63 is used for connecting the drill rod through threads, the steel ribs 64 are used for cutting a soil body, the slurry outlet holes 62 are used for grouting into the drill rod when the drill bit drills into a process and flowing out from the slurry outlet holes, and slurry is mixed with soil cut by the drill.
Referring to fig. 1, the cement-mixed soil is distributed on the outer rings of the drill bit 6 and the anchor rod 1, and includes an anchoring section cement-mixed soil 81 at the lower half portion and a non-anchoring section cement-mixed soil 82 at the upper half portion, and the diameter of the anchoring section cement-mixed soil 81 is greater than that of the non-anchoring section cement-mixed soil 82. When the drill bit 6 rotates to cut the soil body, the slurry outlet hole 62 performs slurry injection on the surrounding soil body to form the cement mixed soil 81 of the anchoring section and the cement mixed soil 82 of the non-anchoring section, high-pressure slurry injection is adopted when the cement mixed soil 81 of the anchoring section is adopted, low-pressure slurry injection is adopted when the cement mixed soil 82 of the non-anchoring section is adopted, and then a structure with a thick lower part and a thin upper part is formed.
Referring to fig. 1, the bag expansion body is located in the anchoring section cement mixing soil 81, and includes an upper sealing body 2, a lower sealing body 3, a bag 5 and a grouting expansion body 10. With reference to fig. 2-4, the upper sealing body 2 and the lower sealing body 3 are fixed on the anchor rod 1 at intervals, an upper sealing body anchor rod hole 21 is formed in the center of the upper sealing body 2, a grouting hole 22 is formed beside the upper sealing body anchor rod hole 21, a lower sealing body anchor rod hole 31 is formed in the center of the lower sealing body 3, and annular threaded grooves 23 are formed in the circumferential directions of the upper sealing body 2 and the lower sealing body 3; the anchor rod 1 sequentially penetrates through an anchor rod hole 21 of the upper sealing body and an anchor rod hole 31 of the lower sealing body, the grouting pipe 4 penetrates through the grouting hole 22, the upper opening and the lower opening of the bag 5 are respectively bound on the outer sides of the upper sealing body 2 and the lower sealing body 3 through a binding belt 51, and the binding belt 51 is embedded into the thread groove 23 to realize sealing; the grouting pipe 4 is connected with the anchor rod 1 in a binding mode through a steel wire 43, one steel wire 43 is bound every 1m, the bottom end of the grouting pipe 4 penetrates through the upper sealing body 2 and extends into the bag 5, the upper end of the grouting pipe 4 is provided with a temporary plug 42, the lower end of the grouting pipe 4 is provided with a one-way check valve 41, and the grouting expanding body 10 is filled into the bag 5 through the grouting pipe 4 in a grouting mode and extrudes and expands the bag 5 outwards.
Referring to fig. 10, when the length of the anchor rod is long, the anchor rod 1 is formed by splicing a plurality of anchor rod single bodies 11, external threads are arranged at the end parts of the anchor rod single bodies 11, and the anchor rod single bodies 11 are connected with each other through threaded sleeves 12 matched with the external threads. Referring to fig. 11, when the length of the grouting pipe 4 needs to be long, the grouting pipe 4 is formed by splicing a plurality of grouting pipe monomers 44, and the grouting pipe monomers 44 are connected by welding.
When the self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod is constructed, firstly, the anchor rod 1, the upper sealing body, the lower sealing body 3, the grouting pipe 4, the bag 5 and the drill bit 6 are assembled to form a structure shown in the attached drawing 9; then the anchor rod 1, the upper sealing body, the lower sealing body 3, the grouting pipe 4 and the bag 5 are inserted into the drill rod 7, the drill rod 7 is connected to the drill bit external thread 63 in a threaded connection mode, the drill rod 7 and the drill bit 6 are rotated by a drilling machine, the drill rod 7 is drilled into the soil body, the steel rib 64 below the drill bit cuts the stirring soil body, meanwhile, grouting is conducted into the drill rod, grout is sprayed out from the grout outlet hole 62 and mixed with the soil body, low-pressure grouting is conducted on the cement stirring soil 82 part in the non-anchoring section, high-pressure grouting is conducted on the cement stirring soil 81 part in the anchoring section, if the lengths of the drill rod 7, the anchor rod 1 and the grouting pipe 4 are insufficient, the drill rod 7, the anchor rod 1 and the grouting pipe 4 are lengthened, the anchor rod 1 is connected with the internal threads at the upper end and the lower end of the anchor rod monomer 11 through the threaded sleeve 12 when the grouting pipe 4 is lengthened, the grouting pipe monomer 44 is lengthened, continuing drilling and grouting after lengthening to form the structure shown in the attached figure 12; then, the drill rod 7 is rotated reversely by a drilling machine, the drill rod 7 is screwed out from the drill bit external thread 63, and the drill rod 7 is pulled out upwards; finally, as shown in fig. 13, a high-pressure grouting pump 9 is connected to the top of the grouting pipe 4, a grouting valve 91 on the high-pressure grouting pump 9 is opened, cement slurry is injected into the bag 5, the bag is further squeezed and expanded, after grouting is completed, the grouting pump 9 and the grouting pipe 4 are disconnected, since a one-way check valve 41 is arranged at the bottom outlet of the grouting pipe 4, the cement slurry cannot flow backwards, and the cement slurry 9 is hardened in the bag 5, so that the grouting expanded body 10 is formed.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (9)
1. The utility model provides a from anti-floating anchor rod of drilling high pressure jet grouting bag slip casting enlargement which characterized in that: the anchor rod comprises an anchor rod (1), a drill bit (6), a bag expanding body, a grouting pipe (4) and cement mixing soil; the bottom end of the anchor rod (1) is fixed with the axis of the drill bit (6), and the grouting pipe (4) is bound on the anchor rod (1) through a steel wire (43); the cement mixing soil is distributed on the drill bit (6) and the outer ring of the anchor rod (1) and comprises anchoring section cement mixing soil (81) of the lower half part and non-anchoring section cement mixing soil (82) of the upper half part; the bag expands the body and is located anchor section cement mixing soil (81), it includes upper seal body (2), lower seal body (3), bag (5) and slip casting and expands body (10), upper seal body (2) and lower seal body (3) interval are fixed on stock (1), the upper and lower opening of bag (5) is connected and is sealed with upper seal body (2) and lower seal body (3) respectively, the bottom of slip casting pipe (4) pass upper seal body (2) and extend to in bag (5), slip casting expands body (10) and fills in bag (5) through slip casting pipe (4) slip casting to outwards crowded expansion bag (5).
2. The self-drilling high-pressure rotary jetting bladder grouting expanding anti-floating anchor rod of claim 1, wherein: the circumference of the upper sealing body (2) and the lower sealing body (3) is provided with an annular thread groove (23), the upper opening and the lower opening of the bag (5) are respectively bound on the outer sides of the upper sealing body (2) and the lower sealing body (3) through a binding belt (51), and the binding belt (51) is embedded into the thread groove (23).
3. The self-drilling high-pressure rotary jetting bladder grouting expanding anti-floating anchor rod of claim 1, wherein: the drilling tool is characterized in that an anchor bolt hole (61) is formed in the axis position of the upper portion of the drilling bit (6), a plurality of grout outlet holes (62) are evenly distributed in the periphery of the anchor bolt hole (61), drill bit external threads (63) connected with a drilling rod are arranged on the outer side of the drilling bit (6), and the bottom end of the anchor rod (1) is screwed into the anchor bolt hole (61).
4. The self-drilling high-pressure rotary jetting bladder grouting expanding anti-floating anchor rod according to claim 1 or 3, characterized in that: the bottom of the drill bit (6) is provided with a plurality of steel ribs (64).
5. The self-drilling high-pressure rotary-jetting bladder grouting expanding anti-floating anchor rod as claimed in claim 1, wherein: anchor rod (1) include a plurality of anchor rod monomers (11), the tip of anchor rod monomer (11) is equipped with the external screw thread, through with external screw thread complex screw sleeve (12) interconnect between anchor rod monomer (11).
6. The self-drilling high-pressure rotary-jetting bladder grouting expanding anti-floating anchor rod as claimed in claim 1, wherein: the upper end of the grouting pipe (4) is provided with a temporary plug (42), and the lower end is provided with a one-way check valve (41).
7. The self-drilling high-pressure rotary-jetting bladder grouting expanding anti-floating anchor rod as claimed in claim 1, wherein: the diameter of the cement mixing soil (81) of the anchoring section is larger than that of the cement mixing soil (82) of the non-anchoring section.
8. The self-drilling high-pressure rotary-jetting bladder grouting expanding anti-floating anchor rod as claimed in claim 1, wherein: the grouting pipe (4) comprises a plurality of grouting pipe single bodies (44) which are sequentially connected from top to bottom, and the grouting pipe single bodies (44) are connected in a welding mode.
9. The self-drilling high-pressure rotary-jetting bladder grouting expanding anti-floating anchor rod as claimed in claim 1, wherein: an upper seal anchor rod hole (21) is formed in the center of the upper seal body (2), a grouting hole (22) is formed beside the upper seal anchor rod hole (21), and a lower seal anchor rod hole (31) is formed in the center of the lower seal body (3); the anchor rod (1) sequentially penetrates through an upper seal body anchor rod hole (21) and a lower seal body anchor rod hole (31), and the grouting pipe (4) penetrates through the grouting hole (22).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920764204.0U CN210315529U (en) | 2019-05-24 | 2019-05-24 | Self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920764204.0U CN210315529U (en) | 2019-05-24 | 2019-05-24 | Self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006823A (en) * | 2021-03-10 | 2021-06-22 | 浙江省隧道工程集团有限公司 | Double-shield TBM (Tunnel boring machine) fractured rock section quick supporting system and construction method thereof |
-
2019
- 2019-05-24 CN CN201920764204.0U patent/CN210315529U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006823A (en) * | 2021-03-10 | 2021-06-22 | 浙江省隧道工程集团有限公司 | Double-shield TBM (Tunnel boring machine) fractured rock section quick supporting system and construction method thereof |
| CN113006823B (en) * | 2021-03-10 | 2023-07-07 | 浙江省隧道工程集团有限公司 | Rapid supporting system for double-shield TBM fractured rock section and construction method thereof |
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