CN217782077U - Connection structure of cut-off wall and foundation pit supporting construction - Google Patents
Connection structure of cut-off wall and foundation pit supporting construction Download PDFInfo
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- CN217782077U CN217782077U CN202221597440.6U CN202221597440U CN217782077U CN 217782077 U CN217782077 U CN 217782077U CN 202221597440 U CN202221597440 U CN 202221597440U CN 217782077 U CN217782077 U CN 217782077U
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- seepage
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Abstract
The utility model discloses a cut-off wall and foundation ditch supporting construction's connection structure, including cut-off pit, flexible cut-off wall, thin wall cut-off wall and connection soil nail, a cut-off pit lateral wall goes upward and has laid flexible cut-off wall. Has the advantages that: the utility model discloses a lay flexible cut-off wall on the foundation ditch lateral wall of preventing seepage, thin wall cut-off wall, reinforced concrete supporting surface layer and connection soil nail, adopt the connection soil nail to be connected formation composite connection wall with cut-off wall and foundation ditch supporting construction for the first time, because the bond strength is stronger between connection soil nail and thin wall cut-off wall and the flexible cut-off wall, the faying face does not have the seepage, thereby the prevention of seepage effect of linking department has been promoted, make this connection structure be applicable to the domatic cut-off wall construction of different angles, and construction period is short, construction cost is low, adopt this kind of connection structure construction method simple and convenient simultaneously, safety and reliability, can effectually prevent the secondary pollution of soil remediation region.
Description
Technical Field
The utility model relates to an environmental protection engineering soil dystopy restoration technical field, concretely relates to cut-off wall and excavation supporting construction's connection structure.
Background
Contaminated soil's restoration is because the particularity of pollutant, and the ectopic processing after the transport need be dug to contaminated soil not a few, includes: the method comprises the following steps of ex-situ thermal desorption, oxidation reduction, cement kiln treatment, hazardous waste landfill and the like, wherein an excavation foundation pit is formed in the excavation process, underground water in the inner side and the outer side of the foundation pit must be strictly isolated according to the national standard requirements in the excavation process, secondary pollution is prevented, and the foundation pit formed by polluted soil restoration excavation is generally shallow.
However, most of the existing shallow foundation pit supports adopt a soil nailing wall support structure, the impermeability of concrete sprayed on the surface of the soil nailing wall of the support structure is poor, some of the support structures are directly provided with water drainage holes on the wall surface to form a water seepage channel, and the impermeable requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome the defects of the prior art, the connection structure of the impervious wall and the foundation pit supporting structure is provided, and the problems that the existing shallow foundation pit supporting structure mostly adopts a soil nailing wall supporting structure, the impermeability of concrete sprayed on the surface of the soil nailing wall of the supporting structure is poor, some water drainage holes are directly arranged on the wall surface to form water seepage channels, and the seepage prevention requirement cannot be met, and in addition, although the foundation pit supporting structure is added with a vertical flexible impervious wall, the seepage prevention effect is good, the technology is mature, the construction period is long, and the construction cost is high are solved.
(II) technical scheme
The utility model discloses a following technical scheme realizes: the utility model provides a cut-off wall and foundation ditch supporting construction's connection structure, including cut-off foundation ditch, flexible cut-off wall, thin wall cut-off wall and connection soil nail, laid all around at the bottom of the cut-off foundation ditch the flexible cut-off wall, flexible cut-off wall upside is connected with reinforced concrete supporting surface layer, laid on the reinforced concrete supporting surface layer connect the soil nail, the cut-off foundation ditch bottom with the department that links to each other of thin wall cut-off wall is connected with flexible cut-off wall, the cut-off foundation ditch bottom is located the escape canal has been laid to flexible cut-off wall one side, the thin wall cut-off wall with reinforced concrete supporting surface layer one side is provided with foundation ditch dry well, foundation ditch dry well one side is provided with the foundation ditch stagnant water stake, cut-off foundation ditch upper end one side has been laid.
Furthermore, the compressive strength of the thin-wall impervious wall is 0.8-1.2Mpa, and the impervious strength is less than N E7.
By adopting the technical scheme, the thin-wall impervious wall is ensured to have sufficient compressive strength and seepage-proofing performance after being laid.
Furthermore, the thickness of the wall body of the thin-wall impervious wall is 60-100mm, and the thin-wall impervious wall and the flexible impervious wall are connected with the impervious foundation pit in a pouring manner.
By adopting the technical scheme, the thin-wall impervious wall can be reliably connected with the flexible impervious wall.
Further, the slope of the seepage-proofing foundation pit is 30-75 degrees, and the drainage ditch is connected with the seepage-proofing foundation pit in a pouring mode.
Through adopting above-mentioned technical scheme, the escape canal is convenient the mediation of ponding in the prevention of seepage foundation ditch is discharged.
Furthermore, the thin-wall impervious wall is formed by sandwiching a layer of mesh nylon net between impervious layers on two sides.
By adopting the technical scheme, the stability of the structure of the thin-wall impervious wall can be effectively ensured.
Furthermore, the connecting soil nails penetrate through the steel reinforcement framework on the reinforced concrete supporting surface layer, and the connecting soil nails penetrate through the thin-wall impervious wall.
By adopting the technical scheme, the bond stress between the connecting soil nail and the thin-wall impervious wall is stronger, so that the joint surface has no leakage, and the impervious effect of the joint is improved.
(III) advantageous effects
Compared with the prior art, the utility model, following beneficial effect has:
the utility model discloses a lay flexible cut-off wall, thin wall cut-off wall, reinforced concrete support surface course and connect the soil nail on the lateral wall of cut-off foundation pit, the first time cut-off wall adopts the connection soil nail to connect with the foundation pit supporting structure and forms compound connecting wall, because the bond strength between connection soil nail and thin wall cut-off wall and flexible cut-off wall is stronger, the faying face does not have the seepage, makes this connection structure be applicable to the cut-off wall construction of different angles, and the construction cycle is short, and the construction cost is low, adopts this kind of connection structure construction method simple and convenient simultaneously, safe and reliable, can effectually prevent soil remediation regional secondary pollution.
Drawings
Fig. 1 is the utility model discloses a cut-off wall and excavation supporting construction's connection structure's schematic structure diagram.
The reference numerals are illustrated below:
1. a reinforced concrete supporting surface layer; 2. thin-wall impervious walls; 3. an anti-seepage foundation pit; 4. a drainage ditch; 5. a flexible impervious wall; 6. a foundation pit drainage well; 7. a foundation pit water stop pile; 8. intercepting a ditch; 9. and connecting the soil nails.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the connection structure of the cut-off wall and the foundation pit supporting structure in this embodiment includes a cut-off foundation pit 3, a flexible cut-off wall 5, a thin-wall cut-off wall 2 and connection soil nails 9, the flexible cut-off wall 5 is arranged around the bottom of the cut-off foundation pit 3, a reinforced concrete supporting surface layer 1 is connected to the upper side of the flexible cut-off wall 5, the connection soil nails 9 are arranged on the reinforced concrete supporting surface layer 1, the connection soil nails 9 penetrate through a reinforcement framework on the reinforced concrete supporting surface layer 1, the connection soil nails 9 penetrate through the thin-wall cut-off wall 2, the holding force between the connection soil nails 9 and the thin-wall cut-off wall 2 is strong, so that the bonding surface has no leakage, thereby improving the cut-off effect at the junction, the connection between the bottom end of the cut-off foundation pit 3 and the thin-wall cut-off wall 2 is connected to the flexible cut-off wall 5, the drainage ditch 4 is arranged at the bottom end of the flexible cut-off foundation pit 3 at one side of the flexible cut-off wall 5, the drainage ditch 4 facilitates dredging and draining of the accumulated water in the cut-off foundation pit 3, the cut-wall cut-off wall 2 is arranged on one side of the cut-off wall 3, and the cut-off ditch 8 is arranged to prevent the cut-wall from flowing into the cut-off water in the cut-off foundation pit 3, and flowing into the cut-off foundation pit 8.
As shown in fig. 1, in this embodiment, the compressive strength of the thin-wall impervious wall 2 is 0.8-1.2Mpa, the impervious strength is less than na E7, so as to ensure that the thin-wall impervious wall 2 has sufficient compressive strength and impervious performance after being laid, the wall thickness of the thin-wall impervious wall 2 is 60-100mm, the thin-wall impervious wall 2 and the flexible impervious wall 5 are both connected with the impervious foundation pit 3 in a pouring manner, so as to ensure that the thin-wall impervious wall 2 and the flexible impervious wall 5 are reliably connected, the slope of the impervious foundation pit 3 is 30 ° -75 °, the drainage ditch 4 is connected with the impervious foundation pit 3 in a pouring manner, the thin-wall impervious wall 2 is formed by sandwiching a layer of nylon mesh between the impervious layers on both sides, and thus the structural stability of the thin-wall impervious wall 2 can be effectively ensured.
The specific implementation process of this embodiment is as follows: the foundation pit supporting and connecting structure is characterized in that a foundation pit water-stop pile 7, a foundation pit dewatering well 6 and a flexible impervious wall 5 are arranged around an impervious foundation pit 3, then earthwork excavation and grouting construction of a connecting soil nail 9 are carried out, then a thin-wall impervious wall 2 is laid on the side wall of the impervious foundation pit 3, the thin-wall impervious wall 2 is laid in two times, a layer of a target nylon net is added on a laying surface after the first laying, then a second impervious layer is laid to complete construction of the thin-wall impervious wall 2, and finally the reinforced concrete supporting surface layer 1 is laid to finish use of the supporting and connecting structure.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a cut-off wall and foundation ditch supporting construction's connection structure which characterized in that: the anti-seepage foundation pit is characterized by comprising an anti-seepage foundation pit (3), a flexible anti-seepage wall (5), a thin-wall anti-seepage wall (2) and connecting soil nails (9), wherein the flexible anti-seepage wall (5) is arranged around the bottom of the anti-seepage foundation pit (3), a reinforced concrete supporting surface layer (1) is connected to the upper side of the flexible anti-seepage wall (5), the connecting soil nails (9) are arranged on the reinforced concrete supporting surface layer (1), the flexible anti-seepage wall (5) is connected to the joint of the bottom end of the anti-seepage foundation pit (3) and the thin-wall anti-seepage wall (2), a drainage ditch (4) is arranged on one side of the flexible anti-seepage wall (5), a foundation pit dry dredging well (6) is arranged on the outer side of the reinforced concrete supporting surface layer (1), a foundation pit water stopping pile (7) is arranged on one side of the foundation pit dry well (6), and a water stopping ditch (8) is arranged on one side of the upper end of the anti-seepage foundation pit (3).
2. The connecting structure of the impervious wall and the foundation pit supporting structure according to claim 1, wherein: the compression strength of the thin-wall impervious wall (2) is 0.8-1.2Mpa, and the impervious strength is less than NxE 7.
3. The connecting structure of the impervious wall and the foundation pit supporting structure as claimed in claim 1, wherein: the wall thickness of the thin-wall impervious wall (2) is 60-100mm, and the thin-wall impervious wall (2) and the flexible impervious wall (5) are connected with the impervious foundation pit (3) in a pouring mode.
4. The connecting structure of the impervious wall and the foundation pit supporting structure as claimed in claim 1, wherein: the slope of the seepage-proofing foundation pit (3) is 30-75 degrees, and the drainage ditch (4) is connected with the seepage-proofing foundation pit (3) in a pouring manner.
5. The connecting structure of the impervious wall and the foundation pit supporting structure according to claim 1, wherein: the thin-wall impervious wall (2) is formed by sandwiching a layer of nylon mesh between impervious layers on two sides.
6. The connecting structure of the impervious wall and the foundation pit supporting structure according to claim 1, wherein: the connecting soil nails (9) penetrate through the steel reinforcement framework on the reinforced concrete supporting surface layer (1), and the connecting soil nails (9) penetrate through the thin-wall impervious wall (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221597440.6U CN217782077U (en) | 2022-06-24 | 2022-06-24 | Connection structure of cut-off wall and foundation pit supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221597440.6U CN217782077U (en) | 2022-06-24 | 2022-06-24 | Connection structure of cut-off wall and foundation pit supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217782077U true CN217782077U (en) | 2022-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221597440.6U Active CN217782077U (en) | 2022-06-24 | 2022-06-24 | Connection structure of cut-off wall and foundation pit supporting construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217782077U (en) |
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2022
- 2022-06-24 CN CN202221597440.6U patent/CN217782077U/en active Active
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