CN212428863U - Quick drilling and pipe discharging device for original-state powder fine sand layer grouting - Google Patents
Quick drilling and pipe discharging device for original-state powder fine sand layer grouting Download PDFInfo
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- CN212428863U CN212428863U CN202021895225.5U CN202021895225U CN212428863U CN 212428863 U CN212428863 U CN 212428863U CN 202021895225 U CN202021895225 U CN 202021895225U CN 212428863 U CN212428863 U CN 212428863U
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Abstract
The utility model discloses a quick drilling low tube device of thin sand bed slip casting of original state powder, include: the grouting pipe is used for being placed in the grouting hole for grouting, one end of the grouting pipe is closed, one end of the grouting pipe is open, the closed end is a front end, and the front end is positioned at the bottom in the grouting hole during grouting; a plurality of grouting holes are formed in the part, positioned in the grouting hole, of the grouting pipe and the front end at intervals; the open end of the grouting pipe is used for being connected with a slurry supply device. When the device is used, collapse is not easy to occur in the drilling process, and during pore-forming grouting, collapse is not easy to trigger, and the radial grouting effect is improved.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering slip casting, concretely relates to quick drilling low tube device of thin sand bed slip casting of original state powder.
Background
In the field of tunnel engineering, after a supporting structure is constructed, radial drilling and grouting filling of a tunnel are usually required to be carried out so as to deal with local formation weakness or water leakage, and the drilling depth is 3-5 m. The scaffold is set up in traditional operation mode, and the manual small-size air drill of handing is punched the operation, but, in stratum such as original state fine sand and original state fine soil, because soil layer granule is little and fine and close, the self-stabilization ability is limited, receive air drill bit and drilling rod dashing to shake the cutting back, very easily collapse the hole, and when drilling depth exceeded 2m, the drilling rod can be held in to the hole soil that collapses, takes place the card and bores the phenomenon, and the efficiency of construction is low, and the pore-forming rate is low.
Grouting is carried out after hole forming, hole collapse is easily triggered, and slurry cannot diffuse within a preset depth range; if the grouting pipe is inserted, hole collapse is easy to trigger, the grouting pipe is difficult to insert to the designed depth, and the grouting effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a quick drilling low tube device of original state powder fine sand layer slip casting uses this drilling low tube device, and difficult emergence in the drilling process collapses to and during the pore-forming slip casting, be difficult for triggering the hole of collapsing, improve radial slip casting effect.
The utility model adopts the following technical scheme: the utility model provides a quick drilling low tube device of original state fine sand layer slip casting, includes: the grouting pipe is used for being placed in the grouting hole for grouting, one end of the grouting pipe is closed, one end of the grouting pipe is open, the closed end is a front end, and the front end is positioned at the bottom in the grouting hole during grouting; a plurality of grouting holes are formed in the part, positioned in the grouting hole, of the grouting pipe and the front end at intervals; the open end of the grouting pipe is used for being connected with a slurry supply device.
A support member comprising:
the connecting core pipes are respectively a pipe body with two open ends, the connecting core pipes are sequentially detachably connected and communicated, and the length after connection is not less than that of the grouting pipe; the plurality of connecting core pipes are axially sleeved in the grouting pipe and can be pulled out of the grouting pipe; in the process of drilling the grouting hole, driving the grouting pipe into the grouting hole; the end part of the rear end connected with the core pipe is used for being communicated with a high-pressure air supply device.
And the high-pressure blowing head is arranged at the end part of the connecting core pipe at the front end and is used for flowing out high-pressure air, and the flowing out high-pressure air is used for blowing and eroding fine sand surrounding rock to form a grouting hole by wind erosion.
Furthermore, the high-pressure blowing head is a conical shell with two open ends, and the conical tip is forward and communicated with the connecting core pipes;
furthermore, a tail rod is connected between the high-pressure air supply device and the connecting core pipe at the rear end, is a pipe body and is communicated with the connecting core pipe.
Furthermore, an anti-spraying disk is sleeved between the tail rod and the connecting core pipe at the rear end in the circumferential direction and is used for blocking high-speed sand blown out in the wind erosion process.
Furthermore, the inner wall of the grouting pipe is attached to the outer wall of the connecting core pipe.
The rapid drilling and pipe discharging method of the rapid drilling and pipe discharging device for the original state fine sand layer grouting comprises the following steps:
erecting a grouting device, and placing a high-pressure blowing head in a grouting orifice pipe which is pre-embedded on the inner wall of the tunnel and is close to the fine sand surrounding rock;
continuously supplying high-pressure air by a high-pressure air supply device, wherein the high-pressure air sequentially penetrates through the tail rod and each connecting core pipe and flows out of the high-pressure blowing head to erode surrounding rock of fine sand around by wind; forming a wind erosion hole; in the wind erosion process, the supporting member and the grouting pipe are continuously moved forwards until the designed depth is reached, grouting holes are formed, and then the air supply is stopped. And pulling out the support member from the grouting pipe, grouting into the grouting pipe, and allowing the support member to flow out of each grouting hole to perform grouting into the surrounding rock. Before erecting the grouting device, the following operations are carried out: and mounting a grouting orifice pipe at the position of a wind erosion grouting hole of the tunnel, and anchoring and fixing the grouting orifice pipe with the tunnel supporting structure.
The rapid drilling and pipe discharging grouting method using the original state powder fine sand layer grouting comprises the following steps:
erecting the grouting device, and placing the high-pressure blowing head in a grouting orifice pipe pre-buried on the inner wall of the tunnel and close to the fine sand surrounding rock;
the high-pressure air is continuously supplied by the high-pressure air supply device, sequentially penetrates through the tail rod and the connecting core pipes, flows out of the high-pressure blowing head, and erodes surrounding fine sand rocks around by wind; forming a wind erosion hole; in the process of wind erosion, the supporting member and the grouting pipe are continuously moved forwards until the designed depth is reached, a grouting hole is formed, and then air supply is stopped;
and pulling out the supporting member from the grouting pipe backwards, then grouting into the grouting pipe by the grouting device, and allowing the supporting member to flow out of the grouting holes to perform grouting into the surrounding rock.
Further, before erecting the grouting device, the following operations are carried out: and mounting a grouting orifice pipe at the position of a wind erosion grouting hole of the tunnel, and anchoring and fixing the grouting orifice pipe with the tunnel supporting structure.
The utility model has the advantages that: 1. the high-pressure wind is used for blowing and eroding to form the holes, so that the hole forming speed is high, the surrounding rock disturbance is small, and the hole collapse phenomenon is greatly reduced. 2. The grouting pipe is sleeved outside the connecting core pipe, and in the process of wind erosion drilling, the grouting pipe is driven to enter the grouting hole, so that pipe discharging is completed while hole forming is performed, and the pipe discharging success rate is improved. 3. The operation is convenient, and mechanical injury accidents are basically avoided.
Drawings
FIG. 1 is a schematic structural diagram of a grouting device for grouting an undisturbed fine sand layer;
FIG. 2 is a left side view (a-a) of a grouting apparatus for grouting an undisturbed fine sand layer;
FIG. 3 is a schematic view of a tunnel radial grouting rapid drilling and pipe lowering operation;
FIG. 4 is a schematic view of grouting after drilling and pipe lowering are completed;
wherein: 1, blowing a head at high pressure; 2, connecting the core pipe; 3, an anti-spraying plate; 4, a tail rod; 5, a quick joint; 6, a ball valve switch; 7 grouting pipe.
[ detailed description ] embodiments
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a slip casting device of thin sand bed slip casting of original state powder, as shown in figure 1, include: the grouting pipe 7 is used for being placed in the grouting hole for grouting, one end of the grouting pipe is closed, one end of the grouting pipe is open, the closed end is a front end, and the front end is positioned at the bottom in the grouting hole during grouting; a plurality of grouting holes are arranged on the grouting pipe 7 at intervals at the part and the front end of the grouting pipe positioned in the grouting holes; the open end of the injection pipe 7 is used for connection with a slurry supply. The slurry outlets are arranged in a plum blossom shape. The grouting pipe 7 is a standard PVC pipe.
The support member includes: the connecting core pipes 2 are all pipe bodies with two open ends, the connecting core pipes 2 are sequentially detachably connected and communicated, and the length after connection is not less than that of the grouting pipe 7; when a grouting hole is drilled, the connecting core pipes 2 are axially sleeved in the grouting pipe 7 to drive the grouting pipe 7 to enter the grouting hole; the end part of the connecting core pipe 2 at the rear end is communicated with a high-pressure air supply device; after the grouting hole is drilled, the grouting pipe 7 is positioned in the grouting hole, and the connecting core pipes 2 are drawn out from the grouting pipe 7. . The connecting core pipe 2 is made of aluminum alloy, is high in strength and light in weight, and is provided with an external thread at one end and an internal thread at the other end.
The end part of the front end connected with the core pipe 2 is provided with a high-pressure blowing head 1 for high-pressure air to flow out, and the flowing high-pressure air is used for blowing and eroding fine sand surrounding rock to form a grouting hole by wind erosion. The adopted high-pressure blowing head 1 is made of stainless steel metal, the sectional area of the cavity is continuously reduced towards the blowing port end at the front end, and the high-pressure blowing head is used for continuously increasing the wind speed and accelerating the wind erosion hole forming speed. The rear end of the high-pressure blowing head 1 is provided with internal threads and is connected with the connecting core pipe 2.
The high-pressure blowing head 1 is a conical shell with two open ends, and the conical tip is forward and communicated with each connecting core pipe 2. After the high-pressure air is blown out by the high-pressure blowing head 1, the air pressure is larger.
A tail rod 4 is connected between the high-pressure air supply device and the connecting core pipe 2 at the rear end, is a pipe body and is communicated with the connecting core pipe 2. The tail rod 4 is made of metal, is about half a meter long, is convenient to hold by two hands to exert force, has one end provided with an external thread, has one end connected with the quick coupling 5, is connected with a slurry source through a rear end pipeline, and is provided with a ball valve switch.
An anti-spraying disc 3 is annularly sleeved between the tail rod 4 and the connecting core tube 2 at the rear end and used for blocking high-speed sand blown out in the wind erosion process. As shown in fig. 2, the blowout preventer disk 3 is a hard thin disk about half a meter in diameter for stopping high-speed gravel soil dust ejected from a hole for a driller. The anti-spraying disk 3 is an annular disk with a round hole at the center and can be nested on the external thread of the tail rod 4.
The inner wall of the grouting pipe 7 is attached to the outer wall of the connecting core pipe 2. The outer diameter of the connecting core pipe 2 is 0.5mm smaller than the inner diameter of the grouting pipe 7, so that the connecting core pipe can smoothly penetrate into the grouting pipe 7, and meanwhile, the gap between the connecting core pipe 2 and the grouting pipe 7 is small, and large particles cannot enter between walls.
The rapid drilling and pipe discharging method of the rapid drilling and pipe discharging device for the original state fine sand layer grouting comprises the following steps:
erecting a grouting device, and placing a high-pressure blowing head 1 in a grouting orifice pipe pre-embedded on the inner wall of the tunnel and close to the fine sand surrounding rock;
high-pressure air is continuously supplied by a high-pressure air supply device, sequentially penetrates through the tail rod 4 and each connecting core pipe 2, flows out of the high-pressure blowing head 1, and erodes surrounding rock of fine sand around by wind; forming a wind erosion hole; in the process of wind erosion, the supporting member and the grouting pipe 7 are continuously moved forwards until the designed depth is reached, a grouting hole is formed, and then air supply is stopped; the support member is pulled out backward from the grout tube 7.
Before erecting the grouting device, the following operations are carried out: and mounting a grouting orifice pipe at the position of a wind erosion grouting hole of the tunnel, and anchoring and fixing the grouting orifice pipe with the tunnel supporting structure. Specifically, according to a conventional grouting process, an orifice pipe is prepared, a supporting structure of a tunnel is drilled, the orifice pipe is inserted, then the orifice pipe and the supporting structure are consolidated into a whole by using cement or an anchoring agent, and when the water burst and sand burst dangerous situation is prevented, the drilled hole can be quickly sealed. And after the orifice pipe is installed, hardening and stabilizing cement or an anchoring agent, and performing wind erosion on the driller.
The quick drilling and pipe discharging grouting method of the quick drilling and pipe discharging device for grouting the original fine sand layer comprises the following steps:
erecting the grouting device, and placing the high-pressure blowing head 1 in a grouting orifice pipe pre-buried on the inner wall of the tunnel and close to the fine sand surrounding rock; the high-pressure air is continuously supplied by the high-pressure air supply device, sequentially penetrates through the tail rod 4 and the connecting core pipes 2, flows out of the high-pressure blowing head 1, and erodes surrounding rock fine sand around by wind; forming a wind erosion hole; in the wind erosion process, the support member and the grouting pipe 7 are continuously moved forward until the designed depth is reached, grouting holes are formed, and then the air supply is stopped.
And (3) drawing out the connected supporting member from the grouting pipe 7 backwards, then grouting into the grouting pipe 7 by the grouting device, and enabling the supporting member to flow out of each grouting hole to perform grouting into the surrounding rock.
Before erecting the grouting device, the following operations are carried out: and mounting a grouting orifice pipe at the position of a wind erosion grouting hole of the tunnel, and anchoring and fixing the grouting orifice pipe with the tunnel supporting structure. Specifically, according to a conventional grouting process, an orifice pipe is prepared, a supporting structure of a tunnel is drilled, the orifice pipe is inserted, then the orifice pipe and the supporting structure are consolidated into a whole by using cement or an anchoring agent, and when the water burst and sand burst dangerous situation is prevented, the drilled hole can be quickly sealed. And after the orifice pipe is installed, hardening and stabilizing cement or an anchoring agent, and performing wind erosion on the driller.
The field construction process comprises the following steps:
(1) processing the grouting pipe 7:
according to the drilling depth of the grouting scheme, a grouting pipe 7 with a designed length is cut or connected, and a slurry outlet is formed in the front end and a section close to the front end.
(2) Connecting a supporting member:
according to the drilling depth of the grouting scheme, a plurality of connecting core pipes 2 are sequentially connected, the total length of the connecting core pipes is more than or equal to the length of a grouting pipe 7, and one end head of each end of the connecting core pipe 2 is connected with a high-pressure blowing head 1;
the anti-spraying disc 3 is nested into the external thread of the tail rod 4, and then the external thread is screwed with the internal thread of the connecting core pipe 2 at the rear end to clamp the anti-spraying disc 3.
(3) Sleeving the grouting pipe 7:
the connected supporting member penetrates into the grouting pipe 7, the high-pressure blowing head 1 penetrates out of a slurry outlet hole of the grouting pipe 7, vaseline or grease is smeared at the end gap of the inner pipe and the outer pipe, the slurry outlet hole of the grouting pipe 7 is circumferentially wound and sealed by using an adhesive tape, and a large amount of fine powder particles are prevented from being accumulated in the gap between the inner pipe and the outer pipe.
(4) Blowing holes by wind:
as shown in fig. 3, connect gradually the tailboom 4, quick-operation joint 5, ball valve switch 6 and put through high-pressure wind feeding device, blow head 1 with high pressure and put into pre-buried good drill way intraductally, and be close to fine sand country rock, open ball valve 6 switch and begin to blow, along with the wind erosion hole constantly deepens, handheld tailboom 4 also constantly gos deep into country rock, simultaneously can be according to the pore-forming condition, twist reverse the adjustment blowpipe often for wind erosion hole is even and straight, until the design depth, form the injected hole, then stop the air feed.
(5) Core-pulling grouting:
and when the grouting pipe 7 completely enters the surrounding rock, namely the designed grouting hole depth is reached and the pipe discharging is completed, closing a switch of a ball valve 6, disconnecting the quick connector 5, holding the grouting pipe 7, and pulling out the tail rod 4, the connected core pipe 2 and the high-pressure blowing head 1 connected with the tail rod. As shown in fig. 4, a slurry pipeline is connected to the rear end of the grouting pipe 7, grouting is performed in the grouting pipe 7, and the slurry flows out from each grouting hole to perform grouting in the surrounding rock.
Claims (5)
1. The utility model provides a quick drilling low tube device of original state fine sand layer slip casting which characterized in that includes:
the grouting pipe (7) is placed in the grouting hole for grouting, one end of the grouting pipe is closed, one end of the grouting pipe is open, the closed end is a front end, and the front end is positioned at the bottom in the grouting hole during grouting; a plurality of slurry outlet holes are formed in the part, positioned in the grouting hole, of the grouting pipe (7) and the front end of the grouting pipe at intervals; the open end of the grouting pipe (7) is used for being connected with a slurry supply device;
a support member comprising:
the connecting core pipes (2) are respectively pipe bodies with two open ends, the connecting core pipes (2) are sequentially detachably connected and communicated, and the length after connection is not less than that of the grouting pipe (7);
when a grouting hole is drilled, the connecting core pipes (2) are axially sleeved in the grouting pipe (7) to drive the grouting pipe (7) to enter the grouting hole; the end part of the connecting core pipe (2) at the rear end is communicated with a high-pressure air supply device;
after a grouting hole is drilled, the grouting pipe (7) is positioned in the grouting hole, and the connecting core pipes (2) are extracted from the grouting pipe (7);
the high-pressure blowing head (1) is arranged at the end part of the connecting core pipe (2) at the front end and used for high-pressure air to flow out, and the flowing high-pressure air is used for blowing and eroding fine sand surrounding rock to form a grouting hole by wind erosion.
2. The rapid drilling and pipe-discharging device for the original-state fine sand layer grouting according to claim 1, characterized in that the high-pressure blowing head (1) is a conical shell with two open ends, and the conical tip is forward and communicated with each connecting core pipe (2).
3. The quick drilling and pipe-lowering device for grouting the undisturbed fine sand layer as claimed in claim 2, wherein a tail rod (4) which is a pipe body and communicated with the connecting core pipe (2) is connected between the high-pressure air supply device and the connecting core pipe (2) at the rear end.
4. The rapid drilling and pipe discharging device for grouting of the undisturbed fine sand layer as claimed in claim 3, wherein a blowout prevention disc (3) is annularly sleeved between the tail rod (4) and the connecting core pipe (2) at the rear end for blocking high-speed wind sand ejected in the wind erosion process.
5. The rapid drilling and pipe-discharging device for grouting of undisturbed fine sand layers as claimed in claim 4, wherein the inner wall of the grouting pipe (7) is attached to the outer wall of the connecting core pipe (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021895225.5U CN212428863U (en) | 2020-09-02 | 2020-09-02 | Quick drilling and pipe discharging device for original-state powder fine sand layer grouting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021895225.5U CN212428863U (en) | 2020-09-02 | 2020-09-02 | Quick drilling and pipe discharging device for original-state powder fine sand layer grouting |
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| CN212428863U true CN212428863U (en) | 2021-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776253A (en) * | 2022-05-31 | 2022-07-22 | 中铁隧道局集团有限公司 | Curtain grouting construction device and method suitable for high-temperature hot spring water stratum |
-
2020
- 2020-09-02 CN CN202021895225.5U patent/CN212428863U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776253A (en) * | 2022-05-31 | 2022-07-22 | 中铁隧道局集团有限公司 | Curtain grouting construction device and method suitable for high-temperature hot spring water stratum |
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