CN110644469A - Sectional grouting device and grouting method for steel perforated pipe grouting - Google Patents
Sectional grouting device and grouting method for steel perforated pipe grouting Download PDFInfo
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- CN110644469A CN110644469A CN201911051273.8A CN201911051273A CN110644469A CN 110644469 A CN110644469 A CN 110644469A CN 201911051273 A CN201911051273 A CN 201911051273A CN 110644469 A CN110644469 A CN 110644469A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011440 grout Substances 0.000 claims abstract description 96
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000007569 slipcasting Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 24
- 239000007924 injection Substances 0.000 abstract description 24
- 239000002689 soil Substances 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 4
- 206010017076 Fracture Diseases 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a sectional grouting device and a grouting method for grouting a steel perforated pipe, wherein the sectional grouting device comprises a grouting pipe, a cylindrical grout stopping plug is arranged at the bottom end of the grouting pipe, a plurality of grooves extending longitudinally are formed in the grouting pipe, a plurality of grout injection holes are formed in the bottoms of the grooves and communicated with the inner side and the outer side of the grouting pipe, a sliding rod is arranged in each groove in a matched mode, a sealing layer is arranged on the surface, attached to the bottoms of the grooves, of each sliding rod, an annular cylinder grout stopping plug is further sleeved on the grouting pipe and connected with all the sliding rods, the cylindrical grout stopping plug and the annular cylinder grout stopping plug are matched with the inner wall of the steel perforated pipe, and a plurality of annular hoops are further sleeved on the grouting pipe and used for enabling the sliding rods to be attached to the bottoms of the grooves. The device can flexibly adjust the length of the grouting section according to the actual condition of the stratum, so that the length of the grouting section is well matched with the actual needed grouting length of the stratum, and additional grouting on a soil body which does not need to be reinforced is avoided, and construction cost increase and resource waste are caused.
Description
Technical Field
The invention relates to the field of karst grouting reinforcement, in particular to a sectional grouting device and a grouting method suitable for grouting steel perforated pipes with large development degree difference of karst fractures at different depths.
Background
The grouting technology is an extremely important construction method in geotechnical engineering. At present, grouting methods commonly adopted in engineering include a grouting pipe grouting method, a steel flower pipe grouting method, a sleeve valve pipe grouting method and the like. Compared with other grouting processes, the steel perforated pipe grouting not only improves the physical and mechanical properties of rock and soil through grouting, but also plays a role in reinforcing, and improves the bearing capacity and the anti-sliding capacity of the foundation.
The existing steel perforated pipe grouting is generally used for grouting and reinforcing all soil layers within a drilling depth range, the length of a grouting section cannot be adjusted according to the actual condition of karst fracture development, and the purposes of sectional controllable and repeated grouting of soil layers with a certain depth and specified thickness are achieved. For the karst fracture development degree difference in the drilling depth range is large, the project of grouting reinforcement is only needed to be carried out on the soil layer at the specified depth and the fracture development, if a steel perforated pipe grouting method is adopted for grouting reinforcement, additional grouting is carried out on the soil body which does not need reinforcement, and construction cost increase and resource waste are caused.
Disclosure of Invention
The invention aims to: aiming at the problems that the existing grouting of the steel perforated pipe is generally used for grouting and reinforcing all soil layers within a drilling depth range, the length of a grouting section cannot be adjusted according to the actual condition of development of karst fractures, and the purposes of section control and repeated grouting of the soil layer with a certain depth and specified thickness are achieved, the sectional grouting device and the grouting method for grouting the steel perforated pipe are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a segmentation slip casting device of steel floral tube slip casting, includes the slip casting pipe, slip casting socle end is equipped with the cylinder and ends the thick liquid stopper, be equipped with a plurality of recesses along longitudinal extension on the slip casting pipe, the recess bottom is equipped with a plurality of grout holes that penetrate, and penetrates the intraductal outside of grout hole intercommunication slip casting, every set the slide bar in the recess, the face of laminating bottom the recess on the slide bar is equipped with the sealing layer, it ends the thick liquid stopper still to overlap to be equipped with annular cylinder on the slip casting pipe, the thick liquid stopper links to each other with all slide bars to end annular cylinder, the thick liquid stopper is ended to the cylinder, annular cylinder ends thick liquid stopper and steel floral tube inner wall adaptation, it is equipped with a plurality of annular hoops still to overlap on the slip casting pipe, annular hoop is used for making slide.
The invention arranges the grouting pipe, the bottom of which is provided with a cylindrical grout stop plug, because the grouting pipe is provided with a plurality of grooves extending along the longitudinal direction, the bottom of each groove is provided with a plurality of grout injection holes which are communicated with the inner side and the outer side of the grouting pipe, each groove is internally provided with a sliding rod, the surface of each sliding rod, which is jointed with the bottom of each groove, is provided with a sealing layer, the grouting pipe is also sleeved with an annular cylinder grout stop plug, the annular cylinder grout stop plugs are connected with all the sliding rods, the cylindrical grout stop plugs and the annular cylinder grout stop plugs are matched with the inner wall of the steel flower pipe, the grouting pipe is also sleeved with a plurality of annular hoops, the annular hoops ensure that the sliding rods are jointed with the bottom of the grooves, the sealing layers block the grout injection holes, because the sliding rods can move along the grooves on the grouting pipe, the distance between the cylindrical grout stop plugs and the annular cylinder grout stop plugs is adjusted according to the actual required grouting section length of a stratum, and the grout injection holes, the device can flexibly adjust the length of the grouting section according to the actual condition of the stratum, so that the length of the grouting section is well matched with the actual needed grouting length of the stratum, and additional grouting on a soil body which does not need to be reinforced is avoided, and construction cost increase and resource waste are caused.
As a preferred embodiment of the present invention, the grouting pipe includes a plurality of segments detachably connected in sequence, and the corresponding sliding rod also includes a plurality of segments detachably connected in sequence. Through all setting up slip casting pipe and slide bar into a plurality of festival section of detachable butt joint in proper order, be convenient for lengthen or subtract the weak point according to the slip casting degree of depth needs, also be convenient for simultaneously manufacturing and transportation.
As the preferred scheme of the invention, four grooves are symmetrically arranged on the grouting pipe, and the diameter of the grouting hole is smaller than the width of the groove. Four grooves are symmetrically arranged on the grouting pipe, so that the grouting pipe is convenient to manufacture and install the sliding rod, the diameter of the grouting hole is smaller than the width of the groove, the sliding rod is attached to the bottom of the groove when the grouting pipe is assembled, and the sealing layer can completely cover and block the grouting hole.
As the preferred scheme of the invention, the positions of the grout injection holes of two opposite grooves are the same, and the grout injection holes of two adjacent grooves are arranged in a vertically staggered manner, so that uniform grout output in all directions during grouting is facilitated.
As a preferable scheme of the present invention, the annular hoop includes two semicircular cylindrical hoops, each of the semicircular cylindrical hoops is provided with a convex groove, the convex groove is adapted to the protruding portion of the sliding rod, and the two semicircular cylindrical hoops are connected by a bolt to form an annular shape. By adopting the scheme, the sliding rod can be attached to the bottom of the groove, the sealing layer can block the grout injection hole, and the two semicircular ring column hoop combined structures are adopted, so that the grouting pipe does not need to be sleeved in or taken out from the top of the grouting pipe, and convenience in installation and disassembly of the annular hoops is facilitated.
In a preferred embodiment of the present invention, the convex groove is connected to the sliding rod by a bolt, so that the annular hoop is prevented from moving up and down.
As the preferable scheme of the invention, the top of the sliding rod is connected with the top of the grouting pipe through a bolt, so that the sliding rod can be prevented from sliding up and down in the groove of the grouting pipe.
As a preferable scheme of the invention, the grouting pipe, the sliding rod and the annular hoop are made of metal materials.
In a preferred embodiment of the present invention, the cylindrical grout stop plug, the annular cylindrical grout stop plug and the sealing layer are made of rubber materials.
A grouting method of a sectional grouting device for grouting steel perforated pipes comprises the following steps:
step one, adopting a down-the-hole drill to drill holes;
step two, after drilling is finished, inserting a steel perforated pipe, and enabling the steel perforated pipe to be located in the center of a drill hole as far as possible;
thirdly, placing a grouting pipe with a cylindrical grout stop plug at the bottom into the steel perforated pipe, then placing a bottom sliding rod with an annular cylindrical grout stop plug at the bottom, tightly attaching a sealing layer of the bottom sliding rod to the groove, and installing annular hoops along the height of the sliding rod in sections;
step four, mounting a second section of grouting pipe and a sliding rod, and mounting annular hoops around the sliding rod;
step five, repeating the step four until the distance reaches the position near the hole, and adjusting the distance between the annular cylinder grout stop plug at the bottom of the sliding rod and the cylindrical grout stop plug at the bottom of the grouting pipe according to the actual condition of the stratum, namely the length of the grouting section;
after the length of the grouting section is determined, mounting a top end sliding rod and a grouting pipe, and connecting and fixing the top end sliding rod and the grouting pipe;
and step seven, grouting is carried out, after grouting of the specified section is finished, the grouting pipe and the slide rod are lifted to the next grouting section, the grouting pipe and the slide rod section which have the connection function in the middle are disassembled, and the step five is repeated to finish karst grouting of the specified section in the drilling range.
According to the method, through the steps one to seven, when the steel perforated pipe is adopted for grouting, the sectional grouting device is assembled into the steel perforated pipe, the distance between the cylindrical grout stop plug and the annular cylindrical grout stop plug is adjusted according to the actual required grouting section length of the stratum, and grout can be discharged from the grout injection holes within the distance range during grouting, so that the grouting section length is flexibly adjusted according to the actual condition of the stratum, the grouting section length is well matched with the actual required grouting length of the stratum, and the problem that additional grouting is carried out on a soil body which does not need to be reinforced, the construction cost is increased and resources are wasted is avoided.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention arranges the grouting pipe, the bottom of which is provided with a cylindrical grout stop plug, because the grouting pipe is provided with a plurality of grooves extending along the longitudinal direction, the bottom of each groove is provided with a plurality of grout injection holes which are communicated with the inner side and the outer side of the grouting pipe, each groove is internally provided with a sliding rod, the surface of each sliding rod, which is jointed with the bottom of each groove, is provided with a sealing layer, the grouting pipe is also sleeved with an annular cylinder grout stop plug, the annular cylinder grout stop plugs are connected with all the sliding rods, the cylindrical grout stop plugs and the annular cylinder grout stop plugs are matched with the inner wall of the steel flower pipe, the grouting pipe is also sleeved with a plurality of annular hoops, the annular hoops ensure that the sliding rods are jointed with the bottom of the grooves, the sealing layers block the grout injection holes, because the sliding rods can move along the grooves on the grouting pipe, the distance between the cylindrical grout stop plugs and the annular cylinder grout stop plugs is adjusted according to the actual required grouting section length of a stratum, and the grout injection holes, the device can flexibly adjust the length of the grouting section according to the actual condition of the stratum, so that the length of the grouting section is well matched with the actual needed grouting length of the stratum, and additional grouting on a soil body which does not need to be reinforced is avoided, and construction cost increase and resource waste are caused.
Drawings
FIG. 1 is a perspective view of a grouting pipe with a cylindrical grout stop plug;
FIG. 2 is a schematic sectional view A-A of FIG. 1;
FIG. 3 is a perspective view of a grout tube;
FIG. 4 is a schematic cross-sectional view B-B of FIG. 3;
FIG. 5 is a perspective view of a slide bar with an annular cylindrical grout stop;
FIG. 6 is a schematic cross-sectional view of C-C of FIG. 5;
FIG. 7 is a perspective view of a slide bar;
FIG. 8 is a schematic cross-sectional view of D-D of FIG. 7;
FIG. 9 is a perspective view of the top slide bar;
FIG. 10 is a schematic cross-sectional view E-E of FIG. 9;
FIG. 11 is a perspective view of the annular band;
FIG. 12 is a schematic cross-sectional view of a slide bar constrained by an annular hoop;
FIG. 13 is a schematic cross-sectional view of the top slide bar fixedly attached to the grout pipe;
fig. 14 is a schematic structural view of the sectional grouting device.
The labels in the figure are: 11-groove, 12-upper thread of grouting pipe, 13-shooting hole, 14-grouting pipe, 15-cylindrical grout stop plug, 16-lower thread of grouting pipe, 22-sliding rod, 23-sliding rod connecting column, 24-circular threaded hole of sliding rod, 25-circular cylindrical grout stop plug, 26-connecting hole of sliding rod, 27-sealing layer, 28-top sliding rod, 29-top sliding rod circular screw hole, 33-bolt, 34-nut, 44-circular hoop, 45-convex groove, 46-fixing plate, 47-circular threaded hole of fixing plate, 48-circular threaded hole of convex groove, 49-semi-circular cylindrical hoop and 55-steel flower pipe.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a sectional grouting device for grouting a steel perforated pipe;
as shown in fig. 1 to 14, the sectional grouting device for steel floral tube grouting in this embodiment includes a grouting tube 14, a cylindrical grout stop plug 15 is disposed at the bottom of the grouting tube 14, a plurality of grooves 11 extending in the longitudinal direction are disposed on the grouting tube 14, a plurality of grout injection holes 13 are disposed at the bottom of each groove 11, the grout injection holes 13 are communicated with the inside and the outside of the grouting tube 14, a sliding rod 22 is disposed in each groove 11, a sealing layer 27 is disposed on the surface of each sliding rod 22, which is attached to the bottom of each groove 11, an annular cylindrical grout stop plug 25 is further sleeved on the grouting tube 14, the annular cylindrical grout stop plug 25 is connected to the bottoms of all the sliding rods 22, the cylindrical grout stop plug 15 and the annular cylindrical grout stop plug 25 are adapted to the inner wall of the steel floral tube 55, a plurality of annular hoops 44 are further sleeved on the grouting tube 14, and the annular hoops 44 are used for attaching the sliding rods 22 to the bottoms of the grooves 11.
The invention arranges the grouting pipe, the bottom of which is provided with a cylindrical grout stop plug, because the grouting pipe is provided with a plurality of grooves extending along the longitudinal direction, the bottom of each groove is provided with a plurality of grout injection holes which are communicated with the inner side and the outer side of the grouting pipe, each groove is internally provided with a sliding rod, the surface of each sliding rod, which is jointed with the bottom of each groove, is provided with a sealing layer, the grouting pipe is also sleeved with an annular cylinder grout stop plug, the annular cylinder grout stop plugs are connected with all the sliding rods, the cylindrical grout stop plugs and the annular cylinder grout stop plugs are matched with the inner wall of the steel flower pipe, the grouting pipe is also sleeved with a plurality of annular hoops, the annular hoops ensure that the sliding rods are jointed with the bottom of the grooves, the sealing layers block the grout injection holes, because the sliding rods 22 can move along the grooves 11 on the grouting pipe 14, the distance between the cylindrical grout stop plugs 15 and the annular cylinder grout stop plugs 25 is adjusted according, and during grouting, the grout injection holes in the interval range can discharge grout, and the device can flexibly adjust the length of the grouting section according to the actual condition of the stratum, so that the length of the grouting section is well matched with the actual grouting length required by the stratum, and the problem that additional grouting is carried out on the soil body which does not need to be reinforced, the construction cost is increased and resources are wasted is avoided.
In this embodiment, the grouting pipe 14 includes a plurality of sections detachably connected in sequence, and the corresponding sliding rod 22 also includes a plurality of sections detachably connected in sequence. Through all setting up slip casting pipe and slide bar into a plurality of festival section of detachable butt joint in proper order, be convenient for lengthen or subtract the weak point according to the slip casting degree of depth needs, also be convenient for simultaneously manufacturing and transportation.
In this embodiment, slip casting pipe 14 body has four cuboid recesses 11 all around symmetrical arrangement, has arranged circular shooting hole 13 on the recess 11, and the diameter in shooting hole 13 is less than the recess 11 width of arranging the shooting hole side, and the shooting hole 13 position of symmetry both sides cuboid recess 11 is the same, and interval staggered arrangement about the shooting hole 13 of two adjacent cuboid recesses 11. The top and the bottom of the grouting pipe 14 are provided with matched upper grouting pipe threads 12 and lower grouting pipe threads 16, so that the upper grouting pipe and the lower grouting pipe can be conveniently connected, and after the upper grouting pipe and the lower grouting pipe 14 are completely connected through the threads, the grooves 11 around the upper grouting pipe and the lower grouting pipe 14 are aligned. The bottom of the bottom end grouting pipe 14 is fixedly connected with a cylindrical grout stopping plug 15 with a certain height. Four grooves are symmetrically arranged on the grouting pipe, so that the grouting pipe is convenient to manufacture and install the sliding rod, the diameter of the grouting hole is smaller than the width of the groove, the sliding rod is attached to the bottom of the groove when the grouting pipe is assembled, and the sealing layer can completely cover and block the grouting hole.
In this embodiment, the slide bar 22 is a cuboid, the width of its minor face slightly is less than the recess 11 width (difference 1mm) of arranging the shooting-grouting hole 13 side, be greater than the diameter of shooting-grouting hole 13, the length on long limit is greater than the recess 11 degree of depth, highly the same with every section of slip casting pipe 14 recess 11 height, top and bottom are equipped with assorted slide bar spliced pole 23 and slide bar connecting hole 26, be convenient for the connection of upper and lower slide bar, only need during the connection insert slide bar spliced pole 23 in slide bar connecting hole 26 can. The bottom end sliding rod 22 is fixedly connected with a circular cylinder grout stop plug 25. The bottom end and the middle part of the connecting sliding rod 22 are provided with a sliding rod circular threaded hole 24 with a certain depth along the height of the rod, and the sliding rod circular threaded hole 24 does not penetrate through the sliding rod 22. The top end sliding rod 28 is provided with a top end sliding rod circular screw hole 29 which is the same as the position and size of the grout injection hole 13 in the groove 11, the top end sliding rod circular screw hole 29 penetrates through the top end sliding rod 28, the top end sliding rod 28 is placed in the groove 11 of the grout injection pipe 14, the top end sliding rod circular screw hole 29 is overlapped with the grout injection hole 13 in the groove 11, a bolt 33 penetrates through the top end sliding rod circular screw hole 29 of the sliding rod on one side, penetrates out of the top end sliding rod circular screw hole 29 on the symmetrical side, and is matched with a nut 34 to fix the top end sliding rod 28 and the grout injection.
In this embodiment, a sealing layer 27 with a certain thickness is disposed on the side surface of the sliding rod 22, where the sliding rod 22 contacts with the grout injection hole 13, and the sealing layer 27 is fixedly connected with the sliding rod 22. Four bottom sliding rods 22 are fixedly connected to the circular-ring-cylinder-shaped grout stop plug 25, the spatial relative positions of the sliding rods 22 are matched with the grooves 11 on the periphery of the grouting pipe 14, the four bottom sliding rods 22 can be placed into the grooves 11 on the periphery of the body of the grouting pipe 14, and the rubber sealing layer 27 is guaranteed to be tightly attached to the grooves 11 on the side of the grout injection hole 13. The outer diameter of the circular ring cylinder grout stop plug 25 is the same as the inner diameter of the steel perforated pipe 55, and the inner diameter of the circular ring cylinder grout stop plug is the same as the outer diameter of the grouting pipe 14. The outer diameter of the cylindrical grout stop plug 15 is the same as the inner diameter of the steel perforated pipe 55.
In this embodiment, the annular hoops 44 include two identical semicircular hoops 49, the inner diameter of each semicircular hoop 49 is slightly larger than the outer diameter (difference is 1mm) of the grouting pipe 14, fixing plates 46 are arranged at two ends of each semicircular hoop, a circular threaded hole 47 of each fixing plate is formed in each fixing plate 46, two rectangular convex grooves 45 are formed in each semicircular hoop 49, the width of each convex groove 45 is slightly larger than the width (difference is 1mm) of the short side of the sliding rod 22, the length of each convex groove 45 is slightly larger than the length (difference is 1mm) of the protrusion of the sliding rod 22 on the groove 11, and a circular threaded hole 48 of each convex groove is formed in each convex. Two semicircular column hoops 49 are symmetrically arranged at two sides of the grouting pipe 14 provided with the sliding rod 22, the circular threaded holes 48 on the convex grooves 45 are aligned with the circular threaded holes 24 on the sliding rod 22 and are tightly fixed through the bolts 33, and the up-and-down movement of the annular hoops 44 is prevented. The bolts 33 and the nuts 34 are installed on the two end fixing plates 46, and two semicircular ring column hoops 49 are fixed to form the annular hoop 44, so that the sliding rod 22 is restrained and the buckling deformation of the sliding rod 22 is prevented. By adopting the scheme, the sliding rod can be attached to the bottom of the groove, the sealing layer can block the grout injection hole, and the two semicircular ring column hoop combined structures are adopted, so that the grouting pipe does not need to be sleeved in or taken out from the top of the grouting pipe, and convenience in installation and disassembly of the annular hoops is facilitated.
In this embodiment, the grouting pipe 14, the sliding rod 22 and the annular hoop 44 are made of metal materials, and the cylindrical grout stop plug 15, the annular cylindrical grout stop plug 25 and the sealing layer 27 are made of rubber materials.
Example 2
The embodiment provides a grouting method of the sectional grouting device for grouting a steel perforated pipe in embodiment 1;
a grouting method of a sectional grouting device for grouting steel perforated pipes comprises the following steps:
step one, adopting a down-the-hole drill to drill holes;
step two, after drilling is completed, inserting the steel perforated pipe 55, and enabling the steel perforated pipe 55 to be located at the center of the drilled hole as far as possible;
thirdly, placing the grouting pipe 14 with the cylindrical grout stop plug 15 at the bottom into the steel perforated pipe 55, then placing the bottom sliding rod 22 with the annular cylindrical grout stop plug 25 at the bottom, tightly attaching the sealing layer 27 of the bottom sliding rod 22 with the groove 11, and simultaneously installing the annular hoops 44 along the height of the sliding rod 22 in sections;
step four, mounting a second section of grouting pipe 14 and a sliding rod 22, wherein the grouting pipes are connected through threads matched with the upper and lower sides, the sliding rod is in butt joint through a sliding rod connecting column 23 and a sliding rod connecting hole 26 matched with the top and the bottom, and meanwhile, annular hoops 44 are mounted on the periphery of the sliding rod;
step five, repeating the step four until the distance reaches the position near the hole, and adjusting the distance between the annular cylinder grout stop plug 25 at the bottom of the sliding rod 22 and the cylindrical grout stop plug 15 at the bottom of the grouting pipe according to the actual condition of the stratum, namely the length of the grouting section;
sixthly, after the length of the grouting section is determined, mounting a top end sliding rod 28 and a grouting pipe 14, aligning the circular threaded hole 24 of the top end sliding rod 28 with the grouting hole 13 of the grouting pipe 14, and fixing the top end sliding rod 28 and the grouting pipe through a bolt 33 and a nut 34;
and seventhly, grouting is carried out, after grouting of the specified section is finished, the grouting pipe 14 and the sliding rod 22 are lifted to the next grouting section, the grouting pipe 14 and the sliding rod 22 which have the connection function in the middle are disassembled, and the fifth step is repeated to finish karst grouting of the specified section in the drilling range.
According to the method, through the steps one to seven, when the steel perforated pipe is adopted for grouting, the sectional grouting device is assembled into the steel perforated pipe, the distance between the cylindrical grout stop plug and the annular cylindrical grout stop plug is adjusted according to the actual required grouting section length of the stratum, and grout can be discharged from the grout injection holes within the distance range during grouting, so that the grouting section length is flexibly adjusted according to the actual condition of the stratum, the grouting section length is well matched with the actual required grouting length of the stratum, and the problem that additional grouting is carried out on a soil body which does not need to be reinforced, the construction cost is increased and resources are wasted is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a segmentation slip casting device of steel floral tube slip casting, a serial communication port, including the slip casting pipe, slip casting socle end is equipped with the cylinder and ends the thick liquid stopper, be equipped with a plurality of recesses along longitudinal extension on the slip casting pipe, the recess bottom is equipped with a plurality of shooting hole, and shoots the intraductal outside of thick liquid intercommunication slip casting, every set the slide bar in the recess, be equipped with the sealing layer with the face of recess bottom laminating on the slide bar, it ends the thick liquid stopper still to overlap on the slip casting pipe to be equipped with annular cylinder, annular cylinder ends the thick liquid stopper and links to each other with all slide bars, the cylinder ends thick liquid stopper, annular cylinder and ends thick liquid stopper and steel floral tube inner wall adaptation, it is equipped with a plurality of annular hoops still to overlap on the slip casting pipe, annular hoop is used for making slide bar and recess bottom.
2. The sectional grouting device for steel perforated pipe grouting according to claim 1, wherein the grouting pipe comprises a plurality of sections detachably butted in sequence, and the corresponding sliding rod also comprises a plurality of sections detachably butted in sequence.
3. The sectional grouting device for steel perforated pipe grouting according to claim 1 or 2, characterized in that four grooves are symmetrically arranged on the grouting pipe, and the diameter of the grouting hole is smaller than the width of the groove.
4. The sectional grouting device for grouting steel floral tubes according to claim 3, wherein the positions of the grout ejecting holes of two opposite grooves are the same, and the grout ejecting holes of two adjacent grooves are arranged in a vertically staggered manner.
5. The sectional grouting device for steel perforated pipe grouting according to claim 1, wherein the annular hoop comprises two semicircular cylindrical hoops, a convex groove is formed in each semicircular cylindrical hoop and is matched with the protruding part of the sliding rod, and the two semicircular cylindrical hoops are connected through bolts to form an annular shape.
6. The staged grouting device for steel floral tube grouting of claim 5, wherein the tongue is bolted to the slide bar.
7. The staged grouting device for steel floral tube grouting of claim 1, wherein the top of the sliding rod is bolted to the top of the grouting tube.
8. The staged grouting device for steel perforated pipe grouting of claim 1, wherein the grouting pipe, the sliding rod and the annular hoop are made of metal materials.
9. The sectional grouting device for steel perforated pipe grouting according to claim 1, wherein the cylindrical grout stop plug, the annular cylindrical grout stop plug and the sealing layer are made of rubber materials.
10. A grouting method using the sectional grouting apparatus for steel floral tube grouting according to any one of claims 2 to 9, comprising the steps of:
step one, adopting a down-the-hole drill to drill holes;
step two, after drilling is finished, inserting a steel perforated pipe, and enabling the steel perforated pipe to be located in the center of a drill hole as far as possible;
thirdly, placing a grouting pipe with a cylindrical grout stop plug at the bottom into the steel perforated pipe, then placing a bottom sliding rod with an annular cylindrical grout stop plug at the bottom, tightly attaching a sealing layer of the bottom sliding rod to the groove, and installing annular hoops along the height of the sliding rod in sections;
step four, mounting a second section of grouting pipe and a sliding rod, and mounting annular hoops around the sliding rod;
step five, repeating the step four until the distance reaches the position near the hole, and adjusting the distance between the annular cylinder grout stop plug at the bottom of the sliding rod and the cylindrical grout stop plug at the bottom of the grouting pipe according to the actual condition of the stratum, namely the length of the grouting section;
after the length of the grouting section is determined, mounting a top end sliding rod and a grouting pipe, and connecting and fixing the top end sliding rod and the grouting pipe;
and step seven, grouting is carried out, after grouting of the specified section is finished, the grouting pipe and the slide rod are lifted to the next grouting section, the grouting pipe and the slide rod section which have the connection function in the middle are disassembled, and the step five is repeated to finish karst grouting of the specified section in the drilling range.
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| CN111691439A (en) * | 2020-06-22 | 2020-09-22 | 福建省华策建设集团有限公司 | Slope anchoring structure and sash beam support construction method using same |
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| CN114412510A (en) * | 2021-12-27 | 2022-04-29 | 武汉大学 | Nested steel perforated pipe grouting device and grouting method |
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