CN214460436U - Reinforced cushion layer supporting system for reinforcing local deep pit - Google Patents
Reinforced cushion layer supporting system for reinforcing local deep pit Download PDFInfo
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- CN214460436U CN214460436U CN202120635349.8U CN202120635349U CN214460436U CN 214460436 U CN214460436 U CN 214460436U CN 202120635349 U CN202120635349 U CN 202120635349U CN 214460436 U CN214460436 U CN 214460436U
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- Prior art keywords
- pit
- cushion layer
- reinforcing
- supporting structure
- bed course
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- 230000003014 reinforcing effect Effects 0.000 title claims description 47
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
- 238000005728 strengthening Methods 0.000 claims abstract description 17
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 239000004567 concrete Substances 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 13
- 238000007569 slipcasting Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
Images
Abstract
The utility model provides a consolidate enhancement bed course supporting system in local pit, includes peripheral supporting construction, foundation ditch structure and local pit structure, and local pit structure excavates in the foundation ditch structure that is close to peripheral supporting construction, and foundation ditch structure includes original foundation ditch portion and strengthens backing layer portion, strengthens backing layer portion and covers local pit structure and be connected with peripheral supporting construction, and the concrete label number, thickness and the arrangement of reinforcement number of strengthening the bed course all are greater than original bed course. The utility model discloses need not to carry on the pit end slip casting reinforcement of local pit again, add and establish construction such as oblique casting brace or anchor rope, through the reinforcement supporting bed course that increases local pit near next-door neighbour supporting construction, make full use of foundation ditch space-time effect reaches the purpose that the control foundation ditch warp, guarantee foundation ditch supporting construction and all ring edge borders safety, simple and convenient easy operation again, saves time limit for a project and cost.
Description
Technical Field
The utility model belongs to the foundation ditch reinforcement field, especially a local pit that closely is close to limit wall position utilizes the reinforced (rfd) system of strutting of enhancement bed course.
Background
Along with the development of cities, super high-rise buildings are more and more, and corresponding ultra-deep foundation pits are also more and more. The basement water collecting pit of the high-rise civil building is an indispensable component in water supply and drainage design, and the fire elevator and the working elevator are also necessary parts of the high-rise building. Because of functional requirements, elevator pit, sump pit etc. are 2 ~ 4m than the bottom plate is generally dark, form local pit in the foundation ditch excavation stage. For the local deep pit close to the side wall, the passive area soil pressure is reduced, the safety of the foundation pit can be threatened by direct excavation, and reinforcement measures are necessary to be taken.
The general local deep pit usually adopts the strengthening forms of pit bottom grouting strengthening, inclined cast bracing or anchor cable and the like, the pit bottom grouting strengthening is not suitable for the condition that the deep foundation pit is excavated, and the strengthening forms of inclined cast bracing or anchor cable and the like are added, so that the construction period is increased, and the construction cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a consolidate enhancement bed course support system of local pit, the hole end slip casting that will solve the local pit is consolidated and is excavated the technical problem that the condition that forms should not adopt to the deep basal pit, still needs to solve to add to establish oblique throwing and props or anchor rope increase time limit for a project, increases engineering cost's technical problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a reinforced cushion layer supporting system for reinforcing a local pit comprises a peripheral supporting structure, a foundation pit structure and a local pit structure inside the supporting structure, wherein the local pit structure is excavated in the foundation pit structure close to the peripheral supporting structure, the foundation pit structure comprises an original foundation pit part and a reinforced cushion layer part, the reinforced cushion layer part covers one side of the local pit structure close to the peripheral supporting structure and is connected with the peripheral supporting structure, so that the local pit structure spans the original foundation pit part and the reinforced cushion layer part,
the original foundation pit part comprises a first foundation pit soil body and an original cushion layer on the upper side of the first foundation pit soil body, the reinforced cushion layer part comprises a second foundation pit soil body and a reinforced cushion layer on the upper side of the second foundation pit soil body,
the original cushion layer is flush with the upper surface of the reinforced cushion layer and is made of reinforced concrete plates, the concrete grade, the thickness and the number of reinforcing bars of the reinforced cushion layer are all larger than those of the original cushion layer,
the local pit structure comprises a third foundation pit soil body and a pit cushion layer on the upper side of the third foundation pit soil body, the two ends of the pit cushion layer are respectively connected with the original cushion layer and the reinforcing cushion layer into a whole, and the concrete mark number, the thickness and the reinforcement number of the pit cushion layer are all consistent with those of the original cushion layer.
The peripheral supporting structure is a pile supporting structure, a wall supporting structure, a pile anchor supporting structure, a wall anchor supporting structure or a row pile supporting structure.
The peripheral supporting structure comprises three side supports surrounding a local deep pit structure, namely a transverse support arranged along the covering direction of the reinforcing cushion layer part and two side longitudinal supports vertical to the transverse support, and the outer sides of the longitudinal edges of the reinforcing cushion layer are connected with the transverse supports.
The reinforcing length of the transverse edge of the reinforcing cushion layer from the transverse edge of the local deep pit structure is L which is more than or equal to 10 m.
The transverse edges of the reinforcing cushion layer are connected with the longitudinal supports.
The reinforced cushion layer is internally provided with steel bars arranged at intervals, and two ends of each steel bar are respectively connected with longitudinal supports at two sides.
And when the length of the transverse support is W, and W is more than 50m, the transverse edge of the reinforcing cushion layer is not connected with the longitudinal support.
The longitudinal width of the reinforcing cushion layer is b, and b is more than or equal to 3 m.
The pit depth of the local deep pit structure is h, h is larger than 1.5m, the distance between the longitudinal edge of one side, close to the transverse support, of the local deep pit structure and the transverse support is a, and a is larger than or equal to 1m and smaller than h.
The reinforcing mat within the range of a is configured for a reinforced concrete beam.
The concrete strength of the reinforcing cushion layer is not less than C30, the thickness is not less than 200mm, and the reinforcing bars are bidirectional reinforcing bars.
Compared with the prior art the utility model has the following characteristics and beneficial effect:
the utility model discloses need not to carry on the pit bottom slip casting reinforcement of local pit again, add and establish construction such as oblique casting brace or anchor rope, through the reinforcement supporting bed course that increases local pit near next-door neighbour supporting construction, make full use of foundation ditch "space-time effect" reaches the purpose that the control foundation ditch warp, guarantees foundation ditch supporting construction and all ring edge borders safety, simple and convenient easy operation again, saves time limit for a project and cost.
The utility model discloses specially adapted has excavated the deep basal pit to the big face elevation, and near next-door neighbour's supporting construction increases the reinforcement of local pit and struts.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic plan view of a first embodiment and a second embodiment of the present invention.
Fig. 2 is a schematic sectional view of the structure of the section a-a of the first embodiment, the second embodiment and the third embodiment in fig. 1.
Fig. 3 is a schematic cross-sectional view of the first embodiment of fig. 1 taken along line B-B.
Fig. 4 is a schematic sectional view of the second embodiment in fig. 1.
Fig. 5 is a schematic plan view of a third embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view of the third embodiment in FIG. 5 taken along line B-B.
Reference numerals: 1-peripheral supporting structure, 11-transverse supporting, 12-longitudinal supporting, 2-foundation pit part, 21-first foundation pit soil, 22-original cushion layer, 3-reinforced cushion layer part, 31-second foundation pit soil, 32-reinforced cushion layer, 4-local deep pit structure, 41-third foundation pit soil, 42-deep pit cushion layer and 5-section steel rib.
Detailed Description
Referring to fig. 1-3, a reinforced cushion support system for reinforcing a local pit comprises a peripheral support structure 1, a foundation pit structure inside the support structure, and a local pit structure 4, wherein the local pit structure 4 is excavated in the foundation pit structure near the peripheral support structure 1, the foundation pit structure includes an original foundation pit portion 2 and a reinforced cushion portion 3, and the reinforced cushion portion 3 covers one side of the local pit structure near the peripheral support structure 1 and is connected with the peripheral support structure 1, so that the local pit structure spans the original foundation pit portion 2 and the reinforced cushion portion 3.
Original foundation ditch portion 2 includes the original bed course 22 of first foundation ditch soil body 21 and first foundation ditch soil body upside, strengthen bed course portion 3 and include the enhancement bed course 32 of second foundation ditch soil body 31 and second foundation ditch soil body upside.
The local pit structure 4 comprises a third foundation pit soil body 41 and a pit cushion 42 on the upper side of the third foundation pit soil body, two ends of the pit cushion 42 are respectively connected with the original cushion 22 and the reinforcing cushion 32 into a whole, and the concrete mark number, the thickness and the reinforcement number of the pit cushion 42 are all consistent with those of the original cushion 22.
The peripheral supporting structure 1 is a pile supporting structure, a wall supporting structure, a pile anchor supporting structure, a wall anchor supporting structure or a row pile supporting structure.
The peripheral supporting structure 1 comprises three side supports surrounding a local deep pit structure, namely a transverse support 11 arranged along the covering direction of a reinforcing cushion layer part and two side longitudinal supports 12 vertical to the transverse support 11, the outer side of the longitudinal edge of the reinforcing cushion layer 32 is connected with the transverse support 11, and at the moment, the reinforcing cushion layer forms opposite tops in the side length range of a foundation pit on one side.
The reinforcing length of the transverse edge of the reinforcing cushion layer 32 from the transverse edge of the local deep pit structure 4 is L, and L is more than or equal to 10 m.
The transverse edge of the reinforcing cushion layer 32 is connected with the longitudinal support 12, the longitudinal width of the reinforcing cushion layer 32 is b, and b is more than or equal to 3 m.
The pit depth of the local deep pit structure 4 is h, h is larger than 1.5m, the distance between the longitudinal edge of one side, close to the transverse support 11, of the local deep pit structure 4 and the transverse support 11 is a, and a is larger than or equal to 1m and smaller than h.
Second embodiment referring to fig. 1, 2 and 4, different from the first embodiment, because the cushion layer forms a butt joint, the reinforcing cushion layer 32 is further internally provided with the steel section bars 5 arranged at intervals in the transverse direction, and two ends of the steel section bars 5 are respectively connected with the longitudinal supports 12 on two sides.
Third embodiment referring to fig. 5, 2 and 6, unlike the first embodiment, when the length of the lateral supports 11 is W, and W is greater than 50m or when a post-cast strip is present, the reinforcing mat may not form an opposite top, and the lateral edges of the reinforcing mat 32 are not connected to the longitudinal supports 12.
In other embodiments, the local pit to supporting structure distance a is within a range where the stresses are least favorable, and the reinforcing mat 32 within a range may be designed for concrete beams.
The concrete construction steps of the embodiment are as follows:
firstly, constructing a peripheral supporting structure, and excavating to a pit bottom large surface elevation according to working conditions;
constructing an original cushion layer and a base plate according to the plan at the original foundation pit part, and constructing a reinforced cushion layer at the reinforced cushion layer part;
thirdly, excavating earthwork at the position of the local deep pit structure after the reinforced cushion layer reaches the strength;
and fourthly, constructing a deep pit cushion layer, and synchronously pouring a bottom plate in the region on the upper sides of the deep pit cushion layer and the reinforcing cushion layer.
Claims (10)
1. The utility model provides a strengthen bed course support system of consolidating local pit which characterized in that: the foundation pit supporting structure comprises a peripheral supporting structure (1), a foundation pit structure and a local deep pit structure (4) which are arranged inside the supporting structure, wherein the local deep pit structure (4) is excavated in the foundation pit structure close to the peripheral supporting structure (1), the foundation pit structure comprises an original foundation pit part (2) and an enhanced cushion layer part (3), the enhanced cushion layer part (3) covers one side of the local deep pit structure close to the peripheral supporting structure (1) and is connected with the peripheral supporting structure (1), so that the local deep pit structure spans the original foundation pit part (2) and the enhanced cushion layer part (3),
the original foundation pit part (2) comprises a first foundation pit soil body (21) and an original cushion layer (22) on the upper side of the first foundation pit soil body, the reinforced cushion layer part (3) comprises a second foundation pit soil body (31) and a reinforced cushion layer (32) on the upper side of the second foundation pit soil body,
the original cushion layer (22) is flush with the upper surface of the reinforced cushion layer (32) and is made of reinforced concrete plates, the grade, the thickness and the number of reinforcing bars of the reinforced cushion layer (32) are all larger than those of the original cushion layer (22),
local pit structure (4) include third foundation ditch soil body (41) and pit bed course (42) of third foundation ditch soil body upside, the both ends of pit bed course (42) are connected as an organic wholely with original bed course (22) and enhancement bed course (32) respectively, the concrete reference numeral, thickness and the arrangement of reinforcement number of pit bed course (42) all keep unanimous with original bed course (22).
2. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 1, wherein: the peripheral supporting structure (1) is a pile supporting structure, a wall supporting structure, a pile anchor supporting structure, a wall anchor supporting structure or a row pile supporting structure.
3. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 1, wherein: the peripheral supporting structure (1) comprises three side supports surrounding a local deep pit structure, namely a transverse support (11) arranged along the covering direction of the reinforcing cushion layer part and two side longitudinal supports (12) vertical to the transverse support (11), and the outer side of the longitudinal edge of the reinforcing cushion layer (32) is connected with the transverse supports (11).
4. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 3, wherein: the reinforcing length of the transverse edge of the reinforcing cushion layer (32) from the transverse edge of the local deep pit structure (4) is L which is more than or equal to 10 m.
5. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 4, wherein: the transverse edges of the reinforcing mat (32) are connected to the longitudinal struts (12).
6. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 5, wherein: the reinforced cushion layer (32) is also internally provided with steel bars (5) arranged at intervals, and two ends of each steel bar (5) are respectively connected with longitudinal supports (12) at two sides.
7. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 4, wherein: when the length of the transverse support (11) is W, and W is more than 50m, the transverse edge of the reinforcing cushion layer (32) is not connected with the longitudinal support (12).
8. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 3, wherein: the longitudinal width of the reinforcing cushion layer (32) is b, and b is more than or equal to 3 m.
9. A reinforcing underlayment support system for strengthening a localized pit as claimed in any one of claims 3 to 6, wherein: the pit depth of the local deep pit structure (4) is h, h is larger than 1.5m, the distance between the longitudinal edge of one side, close to the transverse support (11), of the local deep pit structure (4) and the transverse support (11) is a, and a is larger than or equal to 1m and smaller than h.
10. A reinforcing underlayment support system for strengthening a localized pit as claimed in claim 9, wherein: the reinforcement mat (32) in the range of a is a reinforced concrete beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635349.8U CN214460436U (en) | 2021-03-30 | 2021-03-30 | Reinforced cushion layer supporting system for reinforcing local deep pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635349.8U CN214460436U (en) | 2021-03-30 | 2021-03-30 | Reinforced cushion layer supporting system for reinforcing local deep pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214460436U true CN214460436U (en) | 2021-10-22 |
Family
ID=78175690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120635349.8U Expired - Fee Related CN214460436U (en) | 2021-03-30 | 2021-03-30 | Reinforced cushion layer supporting system for reinforcing local deep pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214460436U (en) |
-
2021
- 2021-03-30 CN CN202120635349.8U patent/CN214460436U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211022 |
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| CF01 | Termination of patent right due to non-payment of annual fee |