CN217710697U - Anti-leakage structure for free section of anchor cable of sand layer of foundation pit - Google Patents
Anti-leakage structure for free section of anchor cable of sand layer of foundation pit Download PDFInfo
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- CN217710697U CN217710697U CN202220333023.4U CN202220333023U CN217710697U CN 217710697 U CN217710697 U CN 217710697U CN 202220333023 U CN202220333023 U CN 202220333023U CN 217710697 U CN217710697 U CN 217710697U
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- free section
- grouting pipe
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Abstract
The utility model relates to the technical field of foundation pit support, and discloses a free section anti-seepage structure of an anchor cable of a foundation pit sand layer, wherein the anchor cable comprises a free section and an anchoring section, a blocking disc is arranged on the free section, and an anti-seepage filler is arranged between the blocking disc and the anchoring section; the anchor cable is provided with a primary grouting pipe and a secondary grouting pipe, and the primary grouting pipe and the secondary grouting pipe are arranged on the barrier disc in a penetrating manner; the separation dish includes disk body and the elastic lantern ring, has the perforation that supplies the anchor rope to wear to establish on the disk body, and the elastic lantern ring cover is established on the anchor rope, and the elastic lantern ring butt is on the disk body. The anti-seepage filler is wound on the free section of the anchor cable and is attached to the side wall of the anchor cable hole, so that the anti-seepage filler is more tightly combined with the anchor cable hole; the free section of the anchor cable is provided with the blocking disc, so that the seepage-proofing filler is prevented from deforming greatly to influence the leakage-proofing effect when the anchor cable is stretched; the elastic lantern ring of the barrier disc is sleeved on the anchor cable and is abutted against the disc body, so that water is prevented from leaking out along the anchor cable, and a better waterproof and anti-seepage effect can be achieved.
Description
Technical Field
The patent of the utility model relates to a excavation supporting's technical field particularly, relates to foundation ditch sand bed anchor rope free section seepage prevention structure.
Background
At present, with the rapid development of urban construction, deep foundation pit supporting projects are more and more, and due to the advantages of high economic superiority, high construction efficiency and the like of a pile-anchor supporting structural form, the pile-anchor supporting structure is more and more used in the foundation pit supporting projects.
However, the common problem of water leakage at the position of the bellows at the free section of the rear edge after the anchor cable is tensioned and locked in the sand layer of the deep foundation pit is not solved well all the time, and the continuous water leakage will inevitably cause the underground water level at the periphery of the foundation pit to be reduced, so that the settlement of roads, pipelines and buildings (structures) in the influence range of the foundation pit is increased, even exceeds the standard, and the potential safety hazard is brought to the foundation pit.
In the prior art, methods such as slurry plugging are generally adopted, but the anti-seepage effect of the methods is limited, and the problem that the plugging of the anchor cable hole with serious water leakage cannot achieve a good anti-seepage effect exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a foundation ditch sand bed anchor rope free section antiseep structure aims at solving prior art, can not play the problem of fine antiseep effect to the shutoff in leaking serious anchor rope hole.
The utility model is realized in such a way that the anchor rope of the sand layer of the foundation pit comprises a free section and an anchoring section, wherein the free section is provided with a barrier disc, and an anti-seepage filler is arranged between the barrier disc and the anchoring section; a primary grouting pipe and a secondary grouting pipe are arranged on the anchor cable, and the primary grouting pipe and the secondary grouting pipe penetrate through the isolation disc; the isolation disc comprises a disc body and an elastic lantern ring, perforations for the anchor cable to penetrate are formed in the disc body, the elastic lantern ring is sleeved on the anchor cable, and the elastic lantern ring abuts against the disc body.
Optionally, the elastic sleeve ring includes a ring body and a table body protruding from the ring body; the platform body is inserted in the through hole, and the ring body abuts against the disc body.
Optionally, an annular groove is formed in a butting surface of the ring body facing the table body, an annular flange is arranged on the tray body, and the annular flange is inserted into the annular groove.
Optionally, be equipped with the leak protection recess on the lateral wall of disk body, be equipped with the leak protection ring in the leak protection recess, the periphery butt of leak protection ring is on the lateral wall in anchor rope hole.
Optionally, a sealing film is wound around the outer periphery of the impermeable filler, and the sealing film is in a tightened state.
Optionally, the wound impermeable filler has a gradually increasing thickness along a direction from the rear end of the free section to the front end of the free section.
Optionally, the anchor cable further includes three steel strands, the three steel strands are bound to the periphery of the primary grouting pipe at the anchoring section, and a plurality of binding groups are bound to the peripheries of the three steel strands along the length direction of the steel strands and are arranged at regular intervals.
Optionally, a plurality of support frames are mounted on the anchor cable, and the peripheries of the support frames are recessed inwards to form recessed grooves; the three steel strand wires are embedded into the concave groove, along the cross section direction of the anchor cable, the three steel strand wires are arranged in an equilateral triangle shape, along the length direction of the steel strand wires, the plurality of support frames are arranged at even intervals, and the support frames and the bundling wire groups are arranged in a staggered mode.
Optionally, a grouting pipe through hole is formed in the middle of the support frame, and the primary grouting pipe penetrates through the grouting pipe through hole.
Optionally, the secondary grouting pipe is arranged at the edge of the support frame in a penetrating manner.
Compared with the prior art, the anti-seepage structure for the free section of the anchor cable of the sand layer of the foundation pit, provided by the utility model, has the advantages that the anti-seepage filler is wound on the free section of the anchor cable, and is attached to the side wall of the anchor cable hole, so that the anti-seepage filler is more tightly combined with the anchor cable hole; the free section of the anchor cable is provided with the blocking disc, so that the seepage-proofing filler is prevented from deforming greatly to influence the leakage-proofing effect when the anchor cable is stretched; the elastic lantern ring of the barrier disc is sleeved on the anchor cable and is abutted against the disc body, so that water is prevented from leaking out along the anchor cable, and a better waterproof and anti-seepage effect can be achieved.
Drawings
Fig. 1 is a schematic perspective view of a leakage-proof structure of a free section of an anchor cable on a sand layer of a foundation pit provided by the utility model;
fig. 2 is a schematic cross-sectional view of a barrier disc of a leakage-proof structure for a free section of an anchor cable in a sand layer of a foundation pit provided by the utility model;
fig. 3 is a schematic view of the supporting frame of the anti-leakage structure for the free section of the anchor cable on the sand layer of the foundation pit.
Description of reference numerals:
10-anchor cable, 1010-free section, 1011-anchoring section, 105-steel strand, 107-guide cap, 120-primary grouting pipe, 130-secondary grouting pipe, 20-support pile, 30-impermeable filler, 40-waist beam, 42-anchorage device, 43-steel backing plate, 44-anchor bar, 300-bundling wire group, 310-support frame, 70-anchor cable hole, 500-barrier disc, 510-disc body, 511-perforation hole, 512-annular flange, 520-elastic collar ring, 521-ring body, 522-platform body, 523-annular groove and 530-leakproof ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail 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.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms can be understood according to specific situations by those of ordinary skill in the art.
Referring to fig. 1-3, the preferred embodiment of the present invention is shown.
The anchor cable 10 comprises a free section 1010 and an anchoring section 1011, the free section 1010 is provided with a barrier disc 500, and an impermeable filler 30 is arranged between the barrier disc 500 and the anchoring section 1011; a primary grouting pipe 120 and a secondary grouting pipe 130 are arranged on the anchor cable 10, and the primary grouting pipe 120 and the secondary grouting pipe 130 are arranged on the barrier disc 500 in a penetrating manner; the blocking plate 500 includes a plate body 510 and an elastic collar 520, the plate body 510 has a through hole 511 for the anchor cable 10 to pass through, the elastic collar 520 is sleeved on the anchor cable 10, and the elastic collar 520 abuts against the plate body 510.
In the anti-seepage structure for the free section of the anchor cable of the foundation pit sand layer provided by the embodiment, the anti-seepage filler 30 is wound on the free section 1010 of the anchor cable 10, and the anti-seepage filler 30 is attached to the side wall of the anchor cable hole 70 and is more tightly combined with the anchor cable hole 70; the free section 1010 of the anchor cable 10 is provided with the blocking disc 500, so that the seepage-proofing filler 30 is prevented from deforming greatly to influence the leakage-proofing effect when the anchor cable 10 is tensioned; the elastic sleeve ring 520 of the blocking disc 500 is sleeved on the anchor cable 10 and abuts against the disc body 510, so that water is prevented from leaking out along the anchor cable 10, and a better waterproof and anti-seepage effect can be achieved.
The anchor cable holes 70 are filled through the primary grouting pipe 120 and the secondary grouting pipe 130, the grout is attached to the periphery of the impermeable filler 30, and after the grout is solidified, an integrally arranged impermeable layer is formed between the grout and the impermeable filler 30, so that a better waterproof and impermeable effect can be achieved.
For the spacer disc 500 on the free section 1010 of the cable bolt 10, the spacer disc 500 includes a disc body 510 and a resilient collar 520. The elastic collar 520 may be made of an elastic material, such as a rubber material, an elastomer, an elastic plastic, or the like.
Specifically, the elastic collar 520 includes a ring body 521 and a platform 522 protruding from the ring body 521; the table 522 is inserted into the through hole 511, and the ring 521 abuts on the tray body 510. The table body 522 is inserted into the through hole 511 of the tray body 510, so that the elastic collar 520 is not easily displaced; the close contact between the ring 521 and the disc 510 makes the anti-leakage effect better.
Preferably, an annular groove 523 is provided on an abutting surface of the ring body 521 facing the table body 522, and an annular flange 512 is provided on the disc body 510, the annular flange 512 being inserted in the annular groove 523. The annular flange 512 and the annular groove 523 are matched, so that water leakage can be better prevented, and the overall anti-leakage effect is better.
Preferably, a leakage preventing groove is formed on an outer sidewall of the tray body 510, a leakage preventing ring 530 is disposed in the leakage preventing groove, and an outer circumference of the leakage preventing ring 530 abuts against a sidewall of the anchor cable hole 70. The anti-leakage ring 530 is also made of an elastic material, so that the anti-leakage ring 530 can be tightly abutted against the sidewall of the anchor cable hole 70 to prevent leakage.
Specifically, a seal film is wound around the outer periphery of the impermeable filler 30, and the seal film is in a tightened state. The sealing film is wound on the periphery of the anti-seepage filler 30, and the anti-seepage filler 30 is vacuumized to keep a tight state, so that the anti-seepage filler is convenient to install and fix, and meanwhile, a good waterproof effect can be achieved.
The material of the sealing film can be a plastic film or an elastic rubber film.
The anti-seepage filler 30 can be made of waste fibers on a construction site, so that on one hand, waste on the construction site can be recycled, and on the other hand, the construction cost can be reduced.
On the other hand, the free section 1010 has an upper portion distant from the anchor section 1011 and a lower portion contacting the anchor section 1011, and when the impermeable filler 30 is wound, the winding is started from the lower portion of the free section 1010 in the upper direction, and the diameter of the lower portion of the free section 1010 after the winding is completed is the same as the diameter of the anchor cable hole 70 in terms of the winding thickness.
The winding length is 1m or more.
The thickness of the wound impermeable filler 30 is gradually increased along the direction from the rear end of the free section 1010 to the front end of the free section 1010, so that when the anchor cable 10 is put down, the free section 1010 gradually enters the anchor cable hole 70, and the free section 1010 is tightly attached to the inner wall of the anchor cable hole 70, so that tightness between the anchor cable 10 and the anchor cable hole 70 is guaranteed in the construction process.
When the anchor cable 10 is lowered, the end of the secondary grouting pipe 130 is fixed to the bottom end of the anchoring section 1011, and the secondary grouting pipe 130 is lowered to the bottom of the anchor cable hole 70 along with the lowering of the anchor cable 10.
When the bottom end of the anchoring section 1011 is placed at the bottom of the anchor cable hole 70, grouting is performed into the anchor cable hole 70 through the primary grouting pipe 120, when grout overflows from the orifice of the anchor cable hole 70, grouting is stopped, the anchor cable 10 is pulled out by 0.25m in the direction away from the hole bottom, and grouting is continued.
Specifically, the bottom of the primary grouting pipe 120 is provided with a grouting opening, during grouting, grout directly flows into the bottom of the anchor cable hole 70 through the primary grouting pipe 120, and gradually rises along with continuous accumulation of the grout until the grout reaches the impermeable filler 30 and is soaked in the impermeable filler 30, and grouting can be stopped when the grout overflows from the outlet of the anchor cable hole 70.
And grouting is carried out from bottom to top, so that the grout is slowly accumulated from bottom to top, the gaps in the drill holes can be more comprehensively filled, and no gaps or bubbles are left, thereby achieving better filling effect.
After primary grouting is completed, because the grout has the interference of bubbles or anchor cable 10 and the like, it is very likely that the grouting is uneven or gaps which are not grouted still exist, thereby the grouting effect is influenced, even a water leakage path is provided for the outside, therefore, after primary grouting is completed, secondary grouting is needed again, secondary grouting uses secondary grouting pipe 130, a plurality of open pores are formed around the pipe wall of secondary grouting pipe 130, and thus, through secondary grouting, the gap area which is not filled by primary grouting can be further filled, thereby the grout inside anchor cable hole 70 is more compact in grouting, the strength of the grout inside anchor cable hole 70 is enhanced, on one hand, the anchor cable 10 is more compact in fixing, on the other hand, the porosity inside of the grout is reduced, and a better waterproof effect can be achieved.
Before putting secondary slip casting pipe 130 down, a plurality of closing membranes are attached to the trompil on secondary slip casting pipe 130, and in the process of putting down, the closing membrane can realize the isolated effect between secondary slip casting pipe 130 and the soil body to avoid external soil body to enter into secondary slip casting pipe 130 through the trompil in, cause the problem such as jam to secondary slip casting pipe 130, in the filling process, under the drive of thick liquid pressure, the closing membrane breaks, and the thick liquid enters into anchor rope hole 70 by secondary slip casting pipe 130.
The grout used for the primary grouting and the secondary grouting is concrete grout, and grout prepared by using a curing agent can also be adopted.
The curing agent comprises a high-efficiency structural agent and an additive, the high-efficiency structural agent and the additive are mixed with water to form cured slurry, the hollow pile section 300 is provided with waste slurry, and the cured slurry and high-pressure air are injected into the waste slurry together; the efficient structural agent accounts for 10-20% of the weight of the waste slurry, the water accounts for 10-20% of the weight of the waste slurry, the additive accounts for 0.5-1.5% of the weight of the waste slurry, and the efficient structural agent is used for curing the waste slurry and is supplemented with the additive to enhance the curing performance.
The fixing structure is a waist beam 40, the waist beam 40 is fixed on the support pile 20, the anchoring section 1011 of the anchor cable 10 penetrates through the waist beam 40 and is anchored and tensioned through an anchorage device 42, and if water leakage from the waist beam 40 occurs, holes are drilled around the water leakage point of the waist beam 40 and are filled with grouting and quick-setting grouting materials.
Specifically, the anchoring section 1011 of the anchor cable is firstly placed down in the anchor cable hole 70, the anchor cable is fixed in the anchor cable hole 70 through primary grouting and secondary grouting, the free section 1010 is placed outside the anchor cable hole 70 at the moment, after the grout is solidified, the free section 1010 penetrates through the back of the waist beam 40, and then stretching and anchoring is performed through the anchorage device 42, at the moment, because the thickness of the impermeable filler 30 wound at the front end of the rear end of the free section 1010 is gradually increased, the impermeable filler 30 can be more tightly attached and fixed with the waist beam 40 along with the stretching of the anchorage device 42, and the tightness in the fixing process is improved.
A steel shim plate 43 is arranged below the anchorage 42.
The wale 40 is arranged on one side of the support pile 20 far away from the side wall of the foundation pit, a plurality of anchor bars 44 are built in the support pile 20 in advance, the anchor bars 44 extend out of the support pile 20 and penetrate through the wale 40, and grout is poured into gaps among the anchor bars 44, the wale 40 and the support pile 20 through a high-pressure pouring machine.
The wale 40 is provided with a pressing surface which is arranged towards the support pile 20, the surface of the pressing surface is chiseled, namely the surface of the pressing surface is chiseled into a concave-convex uneven shape and is fixedly connected with the support pile 20 through an anchorage device 42, and at the moment, the pressing surface of the wale 40 is pressed against the outer surface of the support pile 20; after the fixation is completed, grout is injected between the abutting surface and the outer surface of the support pile 20 through a high-pressure filling machine.
Specifically, the anchor cable 10 further includes three steel strands 105, at the position of the anchoring section 1011, the three steel strands 105 are bound to the outer periphery of the primary grouting pipe 120, and a plurality of binding groups 300 are bound to the outer peripheries of the three steel strands 105 along the length direction of the steel strands 105, and the plurality of binding groups 300 are uniformly arranged at intervals.
The periphery of steel strand 105 is equipped with the cowhells sleeve pipe, can play anticorrosive effect to steel strand 105.
A grouting pipe through hole is formed in the middle of the support frame 310, and the primary grouting pipe 120 is inserted into the grouting pipe through hole.
The primary grouting pipe 120 is made of a soft tubular material, the primary grouting pipe 120 is fixed in the middle of the three steel strands 105, and in the process of placing the steel strands 105 downwards, on one hand, the primary grouting pipe can be prevented from being interfered by soil layers, and the slurry flows more smoothly in the process, and on the other hand, the primary grouting pipe 120 can be guided and positioned in the process below.
A plurality of support frames 310 are mounted on the anchor cable 10, and the peripheries of the support frames 310 are recessed inwards to form recessed grooves; the three steel strands 105 are embedded in the recessed groove, the three steel strands 105 are arranged in an equilateral triangle along the cross section direction of the anchor cable 10, the plurality of support frames 310 are arranged at uniform intervals along the length direction of the steel strands 105, and the support frames 310 and the bundling line group 300 are arranged in a staggered manner. In this way, the anchor cables 10 are arranged in a wide-narrow staggered manner in the length direction, specifically, the width of the part of the anchor cable 10 with the supporting frame 310 is wide, the section of the part of the anchor cable 10 with the binding line group 300 is small, when the impermeable filler 30 is wound, the part of the anchor cable is wound from the binding line group 300 to the supporting frame 310, the winding thickness of the binding line group 300 is based on the fact that the diameter after winding is consistent with the diameter of the anchor cable hole 70, and after the binding line group is wound to the supporting frame 310, the winding is continued, and the binding line group 300 is wound towards the next direction until the winding length meets the design requirement.
In the winding process, the thickness of the anchor cable 10 is not uniform, so that the anchor cable 10 can be combined with the impermeable filler 30 more firmly, the anchor cable 10 is not easy to slide, and the fixing effect is better.
The guide cap 107 is arranged at the bottom end of the anchor cable 10, the guide cap 107 is arranged in an inverted cone shape, and the anchor cable 10 can be pulled and guided in the process of putting down the anchor cable 10.
The primary grouting pipe 120 penetrates through the center of the support frame 310, the primary grouting pipe 120 also penetrates through the center of the strapping line group 300, and the secondary grouting pipe 130 penetrates through the edge of the support frame 310, so that the coverage of primary grouting through the primary grouting pipe 120 and grouting through the secondary grouting pipe 130 is larger, and grout can be more fully poured into the anchor cable holes 70.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The anti-seepage structure for the free section of the anchor cable of the sand layer of the foundation pit is characterized in that a barrier disc is arranged on the free section, and anti-seepage filler is arranged between the barrier disc and the anchoring section; a primary grouting pipe and a secondary grouting pipe are arranged on the anchor cable, and the primary grouting pipe and the secondary grouting pipe penetrate through the barrier disc; the separation disc comprises a disc body and an elastic lantern ring, wherein the disc body is provided with through holes for anchor cables to penetrate through, the elastic lantern ring is sleeved on the anchor cables, and the elastic lantern ring abuts against the disc body;
the elastic lantern ring comprises a ring body and a table body protruding out of the ring body; the platform body is inserted into the through hole, and the ring body abuts against the disc body;
an annular groove is formed in the abutting surface, facing the table body, of the ring body, an annular flange is arranged on the disc body, and the annular flange is inserted into the annular groove;
be equipped with the leak protection recess on the lateral wall of disk body, be equipped with the leak protection ring in the leak protection recess, the periphery butt of leak protection ring is on the lateral wall in anchor rope hole.
2. The foundation pit sand layer anchor cable free section leakage prevention structure as claimed in claim 1, wherein a sealing film is wound around the outer periphery of the leakage prevention filler, and the sealing film is in a tightened state.
3. The foundation pit sand anchor cable free section leakage prevention structure as claimed in claim 2, wherein the thickness of the wrapped impermeable filler is gradually increased in a direction from the rear end of the free section to the front end of the free section.
4. The foundation pit sand layer anchor cable free section leakage prevention structure as claimed in any one of claims 1 to 3, wherein the anchor cable further comprises three steel strands, at the anchoring section position, the three steel strands are bound to the outer periphery of the primary grouting pipe, and a plurality of binding groups are bound to the outer periphery of the three steel strands along the length direction of the steel strands, and the plurality of binding groups are arranged at regular intervals.
5. The foundation pit sand layer anchor cable free section seepage prevention structure as claimed in claim 4, wherein a plurality of support frames are mounted on the anchor cable, and the periphery of each support frame is recessed inwards to form a recessed groove; the three steel strand wires are embedded into the concave groove, along the cross section direction of the anchor cable, the three steel strand wires are arranged in an equilateral triangle shape, along the length direction of the steel strand wires, the plurality of support frames are arranged at even intervals, and the support frames and the bundling wire groups are arranged in a staggered mode.
6. The foundation pit sand layer anchor cable free section leakage prevention structure as claimed in claim 5, wherein a grouting pipe through hole is formed in the middle of the support frame, and the primary grouting pipe is arranged in the grouting pipe through hole in a penetrating manner.
7. The foundation pit sand anchor cable free section anti-seepage structure of claim 6, wherein the secondary grouting pipe is arranged at the edge of the support frame in a penetrating manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220333023.4U CN217710697U (en) | 2022-02-18 | 2022-02-18 | Anti-leakage structure for free section of anchor cable of sand layer of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220333023.4U CN217710697U (en) | 2022-02-18 | 2022-02-18 | Anti-leakage structure for free section of anchor cable of sand layer of foundation pit |
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| Publication Number | Publication Date |
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| CN217710697U true CN217710697U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220333023.4U Active CN217710697U (en) | 2022-02-18 | 2022-02-18 | Anti-leakage structure for free section of anchor cable of sand layer of foundation pit |
Country Status (1)
| Country | Link |
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| CN (1) | CN217710697U (en) |
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