CN214272102U - Waterproof construction of underground foundation ditch precipitation well - Google Patents
Waterproof construction of underground foundation ditch precipitation well Download PDFInfo
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- CN214272102U CN214272102U CN202120009565.1U CN202120009565U CN214272102U CN 214272102 U CN214272102 U CN 214272102U CN 202120009565 U CN202120009565 U CN 202120009565U CN 214272102 U CN214272102 U CN 214272102U
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Abstract
The utility model discloses a waterproof construction of underground excavation precipitation well, it includes the well casing that extends along upper and lower direction, and waterproof construction still includes: a bentonite layer formed of bentonite filled in a lower portion of the well pipe; a steel fiber concrete layer formed of steel fiber concrete filled in the well pipe, the steel fiber concrete layer being positioned on the bentonite layer; and the putty type water swelling and stopping piece surrounds the outer wall of the well pipe. The utility model discloses have better water-proof effects, reduced the seepage hidden danger.
Description
Technical Field
The utility model belongs to the technical field of the construction, a waterproof construction of underground excavation precipitation well is related to.
Background
Along with the increasing demand on underground space for people, deep and large foundation pit engineering is more and more common, at present, underground pipe well precipitation wells are commonly adopted for precipitation of deep and large foundation pit engineering, and the precipitation measure has the advantages of simple construction, wide application, large precipitation depth and the like.
However, the dewatering well of the underground pipe well has the following problems: the underground pipe well precipitation well needs to be sealed after precipitation is finished, but water seepage in the well or water seepage in the well wall easily occurs at the later stage, and the reason for the water seepage in the well wall is mainly that dry-mixed concrete is adopted for plugging in the common construction mode at present, because the water in the underground foundation pit precipitation well is difficult to drain, the precipitation well is small and deep in space, the concrete is difficult to vibrate and compact, the effect of plugging by the dry-mixed concrete is general, and the precipitation well has a water catchment function, so that the leakage rate of the basement precipitation well is higher.
SUMMERY OF THE UTILITY MODEL
At least one to above-mentioned technical problem, the utility model aims at providing a waterproof construction of underground excavation precipitation well, its effect that prevents the seepage is better.
The utility model provides a waterproof construction of underground excavation precipitation well, it includes the well casing that extends along upper and lower direction, waterproof construction still includes: a bentonite layer formed of bentonite filled in a lower portion of the well pipe; and the steel fiber concrete layer is formed by steel fiber concrete filled in the well pipe, and the steel fiber concrete layer is positioned on the bentonite layer, so that the problems of cracking and shrinkage caused by using common concrete are solved.
In one embodiment, the bentonite is sodium bentonite. The sodium bentonite has the function of swelling when meeting water, can form water-insoluble gelatinous crystals to block underground catchment, and simultaneously avoids the influence on the water cement ratio of the micro-expansive concrete in subsequent construction due to the fact that the micro-expansive concrete is poured in water environment.
Further, the height of the bentonite layer is not less than 1 meter.
In one embodiment, the waterproof structure further comprises a putty-type water-swellable stop disposed around the outer wall of the well casing.
In one embodiment, the putty-type water-swelling water stop is formed by wrapping a putty-type water-swelling water stop strip on the outer wall of the well pipe. The structure of the part strengthens the sealing performance of the well wall and prevents the well wall from leaking.
In one embodiment, the upper portion of the well tube has a concrete layer thereon, and the putty-type water-swellable water stop is positioned between the well tube and the concrete layer.
In an embodiment, concrete cushion layer below is equipped with, concrete cushion layer upper berth is equipped with waterproofing membrane, concrete layer form in on the waterproofing membrane, putty type water swelling sealing up spare with be provided with sealed glue between the waterproofing membrane.
In one embodiment, the lower end of the steel fiber concrete layer is lower than the concrete cushion layer.
In an embodiment, the water-tight structure further comprises a water-tight cover plate for closing the upper end of the well tubular. Further, the waterproof cover plate is a metal cover plate.
In one embodiment the upper end of the well casing has a ring of outwardly extending flanges forming a collar for the well casing, the water-tight cover plate being fastened to the collar. And a flange plate and a waterproof cover plate are arranged at the wellhead of the dewatering well to further plug the dewatering well, so that the potential leakage hazard is avoided.
In an embodiment, the upper end of the well pipe is located at a post-cast strip position of the concrete layer.
The utility model adopts the above scheme, compare prior art and have following advantage:
the utility model discloses a waterproof construction of underground foundation ditch precipitation well fills earlier and forms bentonite layer in the well casing and fills steel fiber concrete layer on it, and bentonite water swelling forms the gelatineous crystalline solid that does not dissolve in water, catchments the underground and blocks, avoids the steel fiber concrete who fills after simultaneously to pour under the water environment, avoids influencing its water-cement ratio; the steel fiber concrete further plugs the dewatering well, so that the problems of cracking and shrinkage are avoided, and leakage is avoided; the wall of the precipitation well is sealed by the putty type water swelling water stop piece, so that leakage is avoided, and the cost is low. Therefore, the waterproof structure has a good waterproof effect, reduces the hidden danger of leakage, and is simple in construction process and low in cost.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of a waterproof structure of a dewatering well for an underground foundation pit according to an embodiment of the present invention.
Wherein:
1. a flange plate; 2. a bolt and a nut; 3. a waterproof cover plate; 4. post-pouring a concrete layer; 5. a concrete layer; 6. a putty type water-swelling water stop piece; 7. sealing glue; 8. a steel fiber concrete layer; 9. waterproof coiled materials; 10. a bentonite layer; 11. a well pipe; 12. a concrete cushion; 13. and (5) an undisturbed soil layer.
Detailed Description
The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, enables the advantages and features of the invention to be more readily understood by those skilled in the art. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
The terms of orientation such as "upper" and "lower" are defined based on the attached figure 1 and the orientation of the dewatering well during actual waterproof construction.
The embodiment provides a waterproof construction of underground excavation precipitation well, specifically is waterproof construction of basement precipitation well. Referring to fig. 1, it includes a well pipe 11 extending in the up-down direction. This waterproof construction still includes: a bentonite layer 10 formed of bentonite filled in a lower portion of the well pipe 11; a steel fiber concrete layer 8 formed of steel fiber concrete filled in the well pipe 11, the steel fiber concrete layer 8 being located above the bentonite layer 10; and a putty type water-swelling water stop 6 arranged around the outer wall of the well pipe 11.
In this embodiment, the bentonite layer is specifically formed of sodium bentonite. The sodium bentonite has the function of swelling when meeting water, can form water-insoluble gelatinous crystals to block underground catchment, and simultaneously avoids the influence on the water cement ratio (the water cement ratio refers to the weight ratio of the water consumption in concrete to the cement consumption) caused by the pouring of the micro-expansive concrete for subsequent construction in a water environment. The precipitation well is further plugged by adopting the micro-expansion steel fiber concrete, so that the problems of cracking and shrinkage of common concrete are avoided. Because precipitation well casing 11 space is limited, can't erect the steel reinforcement cage, adopt ordinary concrete direct casting to appear problem such as fracture, shrink easily to lead to the seepage.
In this embodiment, the putty-type water-swelling seal 6 is formed by wrapping a putty-type water-swelling seal around the outer wall of the well pipe 11.
In this embodiment, the upper part of the well pipe 11 is provided with a concrete layer 5, and the putty-type water-swelling water stop member 6 is located between the well pipe 11 and the concrete layer 5.
In this embodiment, concrete layer 5 below is equipped with concrete cushion 12, and concrete cushion 12 upper berth is equipped with waterproofing membrane 9, and concrete layer 5 is formed on waterproofing membrane 9, and concrete cushion 12 lower floor is original state soil layer 13, is provided with sealed glue 7 between putty type water swelling sealing up 6 and the waterproofing membrane 9. The periphery of the dewatering well wall is reinforced and sealed by adopting a PUS polyurethane building sealant 7 and a putty type water swelling water stop strip, so that the leakage of the well wall is prevented. The structure of the soleplate large-surface MBP-Pro macromolecular self-adhesive film pre-paved waterproof coiled material 9 is fully adhered to avoid water channeling.
In this embodiment, the lower end of the steel fibre concrete layer 8 is below the concrete pad 12.
In this embodiment the water-tight construction further comprises a water-tight cover plate 3 for closing the upper end of the well pipe 11. The waterproof cover plate 3 is installed and connected by the bolt and nut fastener 2. The waterproof cover plate is a metal cover plate.
In this embodiment the upper end of the well pipe 11 is provided with a ring of outwardly extending flanges constituting the flange of the well pipe, the watertight cover plate 3 being fastened to the flange. The flange plate 1 and the cover plate are arranged at the wellhead of the dewatering well to further plug the dewatering well, so that the potential leakage hazard is avoided.
In this embodiment, the upper end of the well pipe 11 is located at the concrete post-cast 4.
The waterproof structure of the dewatering well of the underground foundation pit is constructed by the following steps:
A. a concrete pad 12 forming a well pipe 11 surrounding the dewatering well;
B. paving waterproof coiled materials 9 on the concrete cushion layer 12;
C. sealing a gap between the waterproof coiled material 9 and the outer wall of the well pipe 11 by using a sealant 7;
D. the putty type water-swelling water stop piece 6 is arranged on the outer wall of the well pipe 11 in a surrounding way;
E. pouring bottom plate concrete to form a bottom plate concrete layer 5;
F. filling bentonite into the lower part of the well pipe 11 to form a bentonite layer 10;
G. filling steel fiber concrete into the well pipe 11 to form a steel fiber concrete layer 8 on the bentonite layer 10;
H. fastening the waterproof cover plate 3 on the upper end of the well pipe 11;
I. and (3) sealing the well pipe 11 and the waterproof cover plate 3 by pouring concrete to form a bottom plate post-pouring belt.
In step a: a concrete pad 12 is formed around the well pipe 11 of the dewatering well.
In step B: and after the cushion construction and maintenance meet the requirements, constructing an MBP-Pro high-molecular self-adhesive film pre-paved waterproof coiled material 9 on a large surface, and cutting the coiled material at the dewatering well part along the contour of the dewatering well.
In step C: the periphery is sealed by a PUS polyurethane building sealant 7.
In step D: aiming at the part of the dewatering well embedded into the bottom plate concrete, the outer wall of the dewatering well is reinforced and sealed by winding a whole circle of putty type water swelling water stop bars in length.
In step E: the reinforcement and the bottom plate concrete pouring are directly carried out on the bottom plate waterproof layer, the concrete pouring is fully and compactly carried out by vibration, particularly, the vibration is enhanced around the dewatering well wall, and a space closed in the later period of the dewatering well is reserved during the pouring.
In step F: after the dewatering of the dewatering well is finished, a sodium bentonite bag is put into the dewatering well, and a tool is adopted for extrusion, so that the packing is guaranteed to be compact. The sodium bentonite pack packing height is not less than 1m to ensure the blocking of underground water.
In step G: the lower end of the steel fibre concrete layer 8 is below the concrete pad 12. And an inserted vibrating rod is adopted for vibrating, so that the building material is tightly filled. Filling the interior of the dewatering well to the top by adopting micro-expansion steel fiber concrete with the grade not lower than C30, wherein the filling is carried out in a layered manner.
In step H: the flange plate 1 is arranged at the wellhead of the dewatering well, and the wellhead cover plate is fixed in a bolt connection and full welding mode, so that the dewatering well is ensured to be reliably sealed.
In step I: and (3) chiseling and cleaning the poured floor concrete construction joint, then coating CCCW cement-based capillary crystalline waterproof coating for joint treatment, and finally performing closed pouring by adopting the compensation shrinkage concrete which is improved by one strength mark compared with the floor structure to form a concrete layer post-cast strip 4.
The waterproof structure and the method for the dewatering well of the underground foundation pit have the following advantages:
according to the waterproof structure of the dewatering well of the underground foundation pit, the bentonite layer is filled in the well pipe, the steel fiber concrete layer is filled on the well pipe, the bentonite expands when meeting water to form a water-insoluble gelatinous crystal to block underground catchment, and meanwhile, the filled steel fiber concrete is prevented from being poured in a water environment, so that the water-cement ratio of the water-insoluble gelatinous crystal is prevented from being influenced; the steel fiber concrete further plugs the dewatering well, so that the problems of cracking and shrinkage are avoided, and leakage is avoided; the wall of the precipitation well is sealed by the putty type water swelling water stop piece, so that leakage is avoided, and the cost is low. Therefore, the waterproof structure has a good waterproof effect, reduces the hidden danger of leakage, and is simple in construction process and low in cost.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred embodiments, which are intended to enable persons skilled in the art to understand the contents of the present invention and to implement the present invention, and thus, the protection scope of the present invention cannot be limited thereby. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a waterproof construction of underground foundation ditch precipitation well, includes the well casing that extends along upper and lower direction, its characterized in that: the waterproof structure further includes:
a bentonite layer formed of bentonite filled in a lower portion of the well pipe; and
a steel fiber concrete layer formed due to steel fiber concrete filled in the well pipe, the steel fiber concrete layer being positioned on the bentonite layer.
2. The waterproof structure according to claim 1, characterized in that: the bentonite is sodium bentonite.
3. The waterproof structure according to claim 1, characterized in that: the waterproof structure further comprises a putty type water swelling and stopping piece arranged around the outer wall of the well pipe.
4. The waterproof structure according to claim 3, characterized in that: the putty type water swelling water stopping piece is formed by winding a putty type water swelling water stopping strip on the outer wall of the well pipe.
5. The waterproof structure according to claim 3 or 4, characterized in that: the waterproof well casing is characterized in that a concrete layer is arranged outside the upper part of the well casing, and the putty type water swelling water stop piece is located between the well casing and the concrete layer.
6. The waterproof structure according to claim 5, characterized in that: the waterproof structure is characterized in that a concrete cushion is arranged below the concrete layer, waterproof coiled materials are paved on the concrete cushion, the concrete layer is formed on the waterproof coiled materials, and the putty type water swelling water stopping piece and the sealant are arranged between the waterproof coiled materials.
7. The waterproof structure according to claim 6, characterized in that: the lower end of the steel fiber concrete layer is lower than the concrete cushion layer.
8. The waterproof structure according to claim 1, characterized in that: the waterproof structure further comprises a waterproof cover plate for closing the upper end of the well pipe.
9. The waterproof structure according to claim 8, characterized in that: the upper end of the well pipe has a ring of outwardly extending flanges, and the water-tight cover plate is securely connected to the flanges.
10. The waterproof structure according to claim 1, characterized in that: and the upper end part of the well pipe is positioned at the post-cast strip position of the concrete layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120009565.1U CN214272102U (en) | 2021-01-05 | 2021-01-05 | Waterproof construction of underground foundation ditch precipitation well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120009565.1U CN214272102U (en) | 2021-01-05 | 2021-01-05 | Waterproof construction of underground foundation ditch precipitation well |
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| CN214272102U true CN214272102U (en) | 2021-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832279A (en) * | 2021-01-05 | 2021-05-25 | 江苏凯伦建材股份有限公司 | Waterproof structure and method for dewatering well of underground foundation pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832279A (en) * | 2021-01-05 | 2021-05-25 | 江苏凯伦建材股份有限公司 | Waterproof structure and method for dewatering well of underground foundation pit |
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