CN110735655B - Sand gushing prevention equipment for water-rich sand layer and construction method thereof - Google Patents
Sand gushing prevention equipment for water-rich sand layer and construction method thereof Download PDFInfo
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- CN110735655B CN110735655B CN201911056670.4A CN201911056670A CN110735655B CN 110735655 B CN110735655 B CN 110735655B CN 201911056670 A CN201911056670 A CN 201911056670A CN 110735655 B CN110735655 B CN 110735655B
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- sleeve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- General Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Revetment (AREA)
Abstract
The invention discloses sand gushing prevention equipment for a water-rich sand layer and a construction method thereof, which relate to the technical field of tunnel construction and comprise the following steps: s1) preparing before construction and placing a waterproof board laying trolley in place; s2) hanging geotextile; s3) laying, fixing and welding waterproof boards; s4) integrally mounting the two lining steel bars; be provided with the track that extends along the tunnel in the tunnel, the track walking can be followed to the waterproof board laying trolley. The water-rich sand layer sand inrush prevention equipment and the construction method thereof disclosed by the invention adopt an ultrasonic welding fixing process and a vertical extrusion welding technology to well solve the quality problems of construction, installation, fixation and welding of the waterproof board, reduce the weak point of water leakage of the tunnel and improve the waterproof effect of the tunnel.
Description
Technical Field
The invention relates to the technical field of anchor cable hole forming construction methods, in particular to sand gushing prevention equipment for a water-rich sand layer and a construction method thereof.
Background
In recent years, with the rapid development of subway rail traffic, the open cut construction method has been increasingly widely applied to subway construction due to the factors of low construction cost, convenient and rapid construction and the like, the enclosing structure of the underground continuous wall and the anchor cable is more and more widely applied as a main supporting system of the open cut foundation pit, and accordingly, how to carry out anchor cable construction under complex geological conditions becomes an urgent problem to be solved.
In through anchor rope pore-forming work progress, when carrying out the anchor rope pore-forming to rich water sand bed, often can meet the phenomenon of gushing water or gushing sand, cause the sand and soil loss of all ring edge borders, the road surface sinks, the pipeline sinks, the house slope to influence the security of foundation ditch excavation, also cause the destruction to all ring edge borders simultaneously, consequently in prior art, often set up on the continuous wall and prevent gushing the sand device, avoid gushing sand. However, the water gushing or sand gushing amount of the water-rich sand layer is large, the water gushing or sand gushing often occurs at the same time, and the common sand gushing prevention device is only suitable for the condition of small water pressure.
Disclosure of Invention
The invention provides a sand gushing prevention device for a water-rich sand layer and a construction method thereof, aiming at the prior art.
The invention is realized by the following technical scheme: the sand gushing prevention equipment for the water-rich sand layer is sleeved outside the drill rod and comprises a sleeve arranged outside the drill rod, and a sealing and filtering device is arranged between the drill rod and the sleeve; the sealed filtering device comprises a supporting seat, at least 6 sleeve rods and a hemp rope sleeved on the sleeve rods; the supporting seat is an annular supporting seat with the outer diameter smaller than the inner diameter of the sleeve and the inner diameter larger than the outer diameter of the drill rod; the loop bars are uniformly distributed on the supporting seat along the axial direction of the sleeve; the oil hemp rope is woven into the sealed filter screen along the loop bar.
Further, the sleeve comprises two symmetrically arranged semicircular involutory pipes; the supporting seat comprises two semicircular arc-shaped plates; at least 4 loop bars are uniformly arranged on each arc-shaped plate; each arc-shaped plate is woven into a sealed filter screen along the loop bar.
Furthermore, the semicircular involutory pipe comprises a pipe wall, a first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are arranged at two ends of the pipe wall; the first connecting plate is arranged along the outer side surface of the pipe wall and extends outwards, and the first connecting plate and the pipe wall are integrally formed; the second connecting plate is an arc-shaped plate with the inner diameter matched with the outer diameter of the drill rod in a tolerance mode, and the second connecting plate is detachably connected with the pipe wall; connecting pieces arranged along the side surfaces of the pipe wall are arranged on the two side surfaces of the pipe wall; the two semicircular involutory pipes are connected into a whole through a bolt penetrating through the connecting piece.
Furthermore, an annular rubber plate is arranged between the second connecting plate and the pipe wall; the inner diameter of the annular rubber plate is in interference fit with the outer diameter of the drill rod; the outer diameter of the annular rubber plate is not less than that of the pipe wall.
The existing sand gushing prevention equipment comprises three water retaining measures: the first connection plate of the sand gushing prevention device is used for preventing water and fine sand brought out by drill pipe construction from gushing out by means of the tightness of the joint of the first connection plate and the continuous wall; the second line is an oil hemp rope arranged between the sand inrush preventing equipment and the drill rod, and the sealing effect is achieved by utilizing the property that the oil hemp rope expands when meeting water; the third is that sand gushing prevention equipment sets up rubber pad and second connecting plate. However, in the actual installation process, the hemp oil rope is mostly wound outside the drill rod or is inserted between the casing and the drill rod to be filled, the filling is uneven and gaps are easy to occur, the filling degree is according to different experiences of people each time, the filling effect is inconsistent, the filling degree can only be measured through the experiences, and quantification cannot be achieved; and the installation site needs to be filled, so that the installation efficiency is low.
According to the technical scheme provided by the invention, the loop bars which are distributed at equal intervals are adopted to pre-weave the oil hemp ropes on the loop bars, so that the oil hemp ropes are uniformly distributed and can be repeatedly used after being woven once, the efficiency of filling the oil hemp ropes between the sleeve and the drill rod is improved, and the installation efficiency of the sand inrush prevention equipment is improved.
Meanwhile, as the hemp ropes are pre-woven on the loop bars, the filling consistency is good, the distribution is uniform, the filling gaps are not easy to occur, and the sealing effect is good.
The adoption is no less than 6 loop bars, makes the sealed filter screen that the oil hemp rope was woven and is close to circularly, makes its more even cladding on the drilling rod, fills the gap between drilling rod and the sleeve pipe.
Furthermore, the connecting pieces arranged on the side faces of the two matched pipe walls are provided with protrusions and grooves which are alternately arranged, and the protrusions and the grooves on the connecting pieces arranged on the side faces of the two matched pipe walls are mutually matched.
When the two semicircular involutory pipes are installed, the alignment of the two semicircular involutory pipes can be realized only by involuting the groove and the protrusion on the connecting sheet; meanwhile, due to the engagement of the groove and the protrusion, the stability of the two semicircular involutory pipes after installation is better.
Furthermore, an external thread is arranged at one end of the loop bar, which is far away from the supporting seat; and a through hole is formed in the second connecting plate corresponding to the loop bar, and the loop bar penetrates through the through hole and the connecting bolt.
The invention also discloses a construction method of the sand gushing prevention equipment for the water-rich sand layer, which specifically comprises the following steps:
s1) braiding a hemp rope on the loop bar, so that the height of the braided sealing filter screen is not less than that of the sleeve, and one end of the sealing filter screen is attached to the surface of the supporting seat;
s2) locally and properly chiseling the continuous wall, positioning the continuous wall around the anchor cable opening, and driving at least 6 expansion bolts for fixing the sleeve;
s3) after the expansion bolt is checked to be positioned correctly, the sleeve is installed on the continuous wall;
s4) the drill rod penetrates through the sealing and filtering device and then extends into the anchor cable open hole;
s5) installing the sealed filter device woven with the sealed filter screen in the S1) between the casing and the drill rod, and fixing the sealed filter device;
s6) compacting the gap between the sleeve and the continuous wall by using non-woven fabrics and sacks.
Further, in S5), the fixing of the sealed filter device specifically includes: installing the sealed filtering device with the woven sealed filtering net in a sleeve, enabling the sleeve rods to correspond to the through holes in the second connecting plate one by one, then enabling the part, which is not woven with the hemp ropes, of the sleeve rods to penetrate through the through holes in the second connecting plate, screwing bolts on the part, which penetrates through the through holes, of the sleeve rods, and pressing the second connecting plate; and then the second connecting plate is connected with the pipe wall by bolts.
Further, the loop bar penetrates through the annular rubber pad and is connected with the second connecting plate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the sand gushing prevention device for the water-rich sand layer adopts the sleeve rods which are distributed at equal intervals to pre-weave the oil hemp ropes on the sleeve rods, so that the oil hemp ropes are uniformly distributed, and the oil hemp ropes can be repeatedly used after being woven once, thereby improving the efficiency of filling the oil hemp ropes between the sleeve and the drill rod and improving the installation efficiency of the sand gushing prevention device. Meanwhile, as the hemp ropes are pre-woven on the loop bars, the filling consistency is good, the distribution is uniform, the filling gaps are not easy to occur, and the sealing effect is good.
(2) The invention also provides sand gushing prevention equipment for the water-rich sand layer and a construction method thereof, and the oil hemp rope is pre-woven on the loop bar, so that the sealing filter screen woven by the oil hemp rope is uniformly filled, has better sealing effect and can be repeatedly used; meanwhile, the loop bar for weaving the hemp rope is fixed on the second connecting plate, so that the connecting structure of the second connecting plate and the pipe wall is further stabilized, the pressure resistance of the connecting structure is higher, and the stability is good under the condition that the impact force of water and sand sprayed by the drill pipe is higher.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a semicircular involution tube according to the present invention;
wherein: the device comprises a sleeve 1, a semicircular involution pipe 11, a first connecting plate 111, a pipe wall 112, a pipe wall 1121, a protrusion 1122, a groove 113, a second connecting plate, an annular rubber plate 12, a sealing and filtering device 2, a supporting seat 21, a loop bar 22 and a hemp rope 23.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1 and fig. 2, the invention discloses a sand inrush preventing device for a water-rich sand layer, which is sleeved outside a drill rod and comprises a casing 1 arranged outside the drill rod, wherein a sealing and filtering device 2 is arranged between the drill rod and the casing 1; the sealing and filtering device 2 comprises a supporting seat 21, at least 6 sleeve rods 22 and a hemp rope 23 sleeved on the sleeve rods 22; the supporting seat 21 is an annular supporting seat 21 with the outer diameter smaller than the inner diameter of the casing 1 and the inner diameter larger than the outer diameter of the drill rod; the loop bars 22 are uniformly distributed on the supporting seat 21 along the axial direction of the sleeve 1; the hemp rope 23 is woven into a sealed filter screen along the loop bar 22. The loop bars 22 are distributed at equal intervals, the oil hemp ropes 23 are woven on the loop bars 22 through weaving, so that the oil hemp ropes are distributed uniformly, the oil hemp ropes can be repeatedly used after being woven once, the efficiency of filling the oil hemp ropes 23 between the sleeve 1 and the drill rod is improved, and the installation efficiency of the sand inrush prevention equipment is improved.
And because the hemp ropes 23 are woven on the loop bars 22 in advance, the filling consistency is good, the distribution is uniform, the filling gaps are not easy to occur, and the sealing effect is good.
The sleeve 1 comprises two symmetrically arranged semicircular involutory pipes 11; the supporting seat 21 comprises two semicircular arc-shaped plates; at least 4 loop bars 22 are uniformly arranged on each arc-shaped plate; each arc plate is woven into a sealed filter screen along a loop bar 22. The arc structure of supporting seat 21 and the arc structure phase-match of sleeve pipe 1 inside wall make the sealed filter screen of weaving on supporting seat 21 and the supporting seat 21 can put into sleeve pipe 1 in, and the sealed filter screen of weaving formation on two supporting seats 21 can make up into and can overlap the annular structure on the drilling rod.
The semicircular involution pipe 11 comprises a pipe wall 112, a first connecting plate 111 and a second connecting plate 113, wherein the first connecting plate 111 and the second connecting plate are arranged at two ends of the pipe wall 112; the first connecting plate 111 is arranged along the outer side surface of the tube wall 112 and extends outwards, and the first connecting plate 111 and the tube wall 112 are integrally formed; the second connecting plate 113 is an arc-shaped plate with the inner diameter matched with the outer diameter of the drill rod in a tolerance mode, and the second connecting plate 113 is detachably connected with the pipe wall 112; connecting pieces arranged along the side surfaces of the pipe wall 112 are arranged on the two side surfaces of the pipe wall 112; the two semicircular involutory pipes 11 are connected into a whole through bolts penetrating through the connecting sheets.
An annular rubber plate 12 is also arranged between the second connecting plate 113 and the pipe wall 112; the inner diameter of the annular rubber plate 12 is in interference fit with the outer diameter of the drill rod; the outer diameter of the annular rubber plate 12 is not smaller than the outer diameter of the pipe wall 112.
During installation of the two semicircular involutory pipes 11, the two semicircular involutory pipes 11 can be aligned only by involuting the grooves 1122 and the protrusions 1121 on the connecting pieces; meanwhile, due to the engagement of the grooves 1122 and the protrusions 1121, the stability of the two semicircular involution pipes 11 after installation is better.
An external thread is arranged at one end of the loop bar 22 far away from the supporting seat 21; a through hole is formed in the second connecting plate 113 corresponding to the loop bar 22, and the loop bar 22 penetrates through the through hole and the connecting bolt, so that the annular rubber plate 12 compresses the sealed filter screen, and meanwhile, the sealed installation of the sleeve 1 is realized.
The invention also discloses a construction method of the sand gushing prevention equipment for the water-rich sand layer, which specifically comprises the following steps:
s1) knitting the hemp rope 23 on the loop bar 22, so that the height of the knitted sealed filter screen is not less than that of the sleeve 1, and one end of the sealed filter screen is attached to the surface of the supporting seat 21;
s2) locally and properly chiseling the continuous wall, positioning the continuous wall around the anchor cable opening, and driving at least 6 expansion bolts for fixing the sleeve 1;
s3) checking that the expansion bolt is positioned correctly, and then installing the sleeve 1 on the continuous wall;
s4) the drill rod penetrates through the sealing and filtering device 2 and then extends into the anchor cable open hole;
s5) installing the sealed filter device 2 woven with the sealed filter screen in the S1) between the casing 1 and the drill rod, and fixing the sealed filter device 2;
s6) compacting the gap between the sleeve 1 and the continuous wall by using non-woven fabrics and sacks.
S5), the sealing and filtering device 2 is fixed, specifically including the steps of: installing the sealed filter device 2 with the woven sealed filter screen in the sleeve 1, enabling the loop bar 22 to correspond to the through holes in the second connecting plate 113 one by one, enabling the part of the loop bar 22 which is not woven with the hemp rope 23 to penetrate through the through holes in the second connecting plate 113, screwing bolts on the part of the loop bar 22 which penetrates through the through holes, and pressing the second connecting plate 113 tightly; and then bolted to the second connecting plate 113 and the tube wall 112.
The loop bar 22 passes through the annular rubber pad and is connected with the second connecting plate 113.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (3)
1. A construction method for preventing sand gushing of a water-rich sand layer is realized based on equipment for preventing sand gushing of the water-rich sand layer, the equipment for preventing sand gushing of the water-rich sand layer comprises a sleeve (1) arranged outside a drill rod, and a sealing and filtering device (2) is arranged between the drill rod and the sleeve (1); the device is characterized in that the sealing and filtering device (2) comprises a supporting seat (21), at least 6 sleeve rods (22) and a hemp rope (23) sleeved on the sleeve rods (22); the supporting seat (21) is an annular supporting seat (21) with the outer diameter smaller than the inner diameter of the sleeve (1) and the inner diameter larger than the outer diameter of the drill rod; the sleeve rods (22) are uniformly distributed on the supporting seat (21) along the circumferential direction of the axis of the sleeve (1); the hemp rope (23) is woven into a sealed filter screen along the loop bar (22); the sleeve (1) comprises two symmetrically arranged semicircular involutory pipes (11); the supporting seat (21) comprises two semicircular arc-shaped plates; at least 4 loop bars (22) are uniformly arranged on each arc-shaped plate; each arc-shaped plate is woven into a sealed filter screen along a loop bar (22); the semicircular involutory pipe (11) comprises a pipe wall (112), a first connecting plate (111) and a second connecting plate (113), wherein the first connecting plate and the second connecting plate are arranged at two ends of the pipe wall (112); the first connecting plate (111) is arranged along the outer side surface of the pipe wall (112) and extends outwards, and the first connecting plate (111) and the pipe wall (112) are integrally formed; the second connecting plate (113) is an arc-shaped plate with the inner diameter matched with the outer diameter of the drill rod in a tolerance mode, and the second connecting plate (113) is detachably connected with the pipe wall (112); connecting pieces arranged along the side surfaces of the pipe wall (112) are arranged on the two side surfaces of the pipe wall (112); the two semicircular involutory pipes (11) are connected into a whole through a bolt penetrating through the connecting sheet; an annular rubber plate (12) is arranged between the second connecting plate (113) and the pipe wall (112); the inner diameter of the annular rubber plate (12) is in interference fit with the outer diameter of the drill rod; the outer diameter of the annular rubber plate (12) is not less than that of the pipe wall (112); protrusions (1121) and grooves (1122) which are alternately arranged are arranged on the connecting pieces arranged on the side surfaces of the two matched pipe walls (112), and the protrusions (1121) and the grooves (1122) on the connecting pieces arranged on the side surfaces of the two matched pipe walls (112) are matched with each other; an external thread is arranged at one end of the loop bar (22) far away from the supporting seat (21); a through hole is formed in the second connecting plate (113) corresponding to the loop bar (22), and the loop bar (22) penetrates through the through hole and the connecting bolt; the method is characterized by comprising the following steps:
s1) knitting a hemp rope (23) on the loop bar (22) to ensure that the height of the knitted sealed filter screen is not less than that of the sleeve (1) and one end of the sealed filter screen is attached to the surface of the supporting seat (21);
s2) locally and properly chiseling the continuous wall, positioning the continuous wall around the anchor cable opening, and driving at least 6 expansion bolts for fixing the sleeve (1);
s3) after the expansion bolt is checked to be positioned correctly, the sleeve (1) is installed on the continuous wall;
s4) the drill rod penetrates through the sealing and filtering device (2) and then extends into the anchor cable open hole;
s5) installing the sealed filter device (2) woven with the sealed filter screen in the S1) between the casing pipe (1) and the drill pipe, and fixing the sealed filter device (2);
s6) the gap between the sleeve (1) and the continuous wall is compacted by non-woven fabrics and sacks.
2. The construction method for preventing sand inrush of the water-rich sand layer according to claim 1, characterized in that: s5), fixing the sealed filtering device (2), and specifically comprises the following steps: installing a sealed filtering device (2) with a woven sealed filtering screen in a sleeve (1), enabling a sleeve rod (22) to correspond to through holes in a second connecting plate (113) one by one, enabling the part, which is not woven with a hemp rope (23), of the sleeve rod (22) to penetrate through the through holes in the second connecting plate (113), screwing bolts on the part, which penetrates through the through holes, of the sleeve rod (22), and pressing the second connecting plate (113); and then the second connecting plate (113) is connected with the pipe wall (112) by bolts.
3. The construction method for preventing sand gushing of the water-rich sand layer according to claim 2, characterized in that: the loop bar (22) penetrates through the annular rubber pad and is connected with the second connecting plate (113).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056670.4A CN110735655B (en) | 2019-10-31 | 2019-10-31 | Sand gushing prevention equipment for water-rich sand layer and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056670.4A CN110735655B (en) | 2019-10-31 | 2019-10-31 | Sand gushing prevention equipment for water-rich sand layer and construction method thereof |
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| CN110735655A CN110735655A (en) | 2020-01-31 |
| CN110735655B true CN110735655B (en) | 2021-06-01 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535462A (en) * | 2012-03-16 | 2012-07-04 | 广州中煤江南基础工程公司 | Method for constructing anchor cable on sand layer |
| CN203035152U (en) * | 2012-12-25 | 2013-07-03 | 广东省基础工程公司 | Sand gushing preventive device for perforation |
| CN103726495A (en) * | 2014-01-10 | 2014-04-16 | 上海建工五建集团有限公司 | Offshore deep foundation pit supporting structure and construction method thereof |
| CN108755676A (en) * | 2018-05-05 | 2018-11-06 | 深圳市蛇口招商港湾工程有限公司 | Anchor cable construction method under the conditions of rich aquifer sand layer |
| CN110158589A (en) * | 2019-05-14 | 2019-08-23 | 中铁建华南建设有限公司 | The Water sealing method and its seal water structure of the anchor cable hole of water rich strata diaphram wall |
| CN110284744A (en) * | 2019-08-01 | 2019-09-27 | 中国人民解放军军事科学院国防工程研究院 | The protection closing device of aperture, reaming after a kind of people's air defense wall |
-
2019
- 2019-10-31 CN CN201911056670.4A patent/CN110735655B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535462A (en) * | 2012-03-16 | 2012-07-04 | 广州中煤江南基础工程公司 | Method for constructing anchor cable on sand layer |
| CN203035152U (en) * | 2012-12-25 | 2013-07-03 | 广东省基础工程公司 | Sand gushing preventive device for perforation |
| CN103726495A (en) * | 2014-01-10 | 2014-04-16 | 上海建工五建集团有限公司 | Offshore deep foundation pit supporting structure and construction method thereof |
| CN108755676A (en) * | 2018-05-05 | 2018-11-06 | 深圳市蛇口招商港湾工程有限公司 | Anchor cable construction method under the conditions of rich aquifer sand layer |
| CN110158589A (en) * | 2019-05-14 | 2019-08-23 | 中铁建华南建设有限公司 | The Water sealing method and its seal water structure of the anchor cable hole of water rich strata diaphram wall |
| CN110284744A (en) * | 2019-08-01 | 2019-09-27 | 中国人民解放军军事科学院国防工程研究院 | The protection closing device of aperture, reaming after a kind of people's air defense wall |
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| CN110735655A (en) | 2020-01-31 |
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Inventor after: Su Chunsheng Inventor after: Liang Penggang Inventor after: Liu Hongyu Inventor after: Zhou Wen Inventor after: Wei Shoufeng Inventor after: Ma Tianchang Inventor after: Rao Shengbin Inventor after: Ding Chuanquan Inventor after: He Shimei Inventor after: Xu Shaoping Inventor after: Tang Zhenya Inventor before: Su Chunsheng Inventor before: Liang Penggang Inventor before: Liu Hongyu Inventor before: He Shimei Inventor before: Xu Shaoping Inventor before: Ma Tianchang Inventor before: Rao Shengbin Inventor before: Ding Chuanquan Inventor before: Zhou Wen Inventor before: Wei Shoufeng Inventor before: Tang Zhenya |
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