CN216999743U - Foundation pit enclosure structure capable of constructing inclined support before excavation of foundation pit - Google Patents
Foundation pit enclosure structure capable of constructing inclined support before excavation of foundation pit Download PDFInfo
- Publication number
- CN216999743U CN216999743U CN202220065967.8U CN202220065967U CN216999743U CN 216999743 U CN216999743 U CN 216999743U CN 202220065967 U CN202220065967 U CN 202220065967U CN 216999743 U CN216999743 U CN 216999743U
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- pile
- steel
- fender
- excavation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a foundation pit support structure capable of constructing an inclined support before foundation pit excavation, and aims to provide a foundation pit support structure capable of completing construction of an inclined pile before foundation pit excavation so as to complete foundation pit excavation operation at one time under the condition of ensuring the stability of foundation pit support, thereby optimizing the construction process steps and accelerating the total construction period of the foundation pit. The foundation pit supporting structure comprises fender posts which are distributed along the edge of a foundation pit; the inclined support pile comprises a cement soil mixing pile arranged in a foundation pit soil layer on the inner side of the fender pile and an inclined steel pile inserted in the cement soil mixing pile, the cement soil mixing pile is distributed in an inclined manner, the upper end of the cement soil mixing pile is close to or intersected with the upper end of the fender pile, and the lower end of the cement soil mixing pile inclines towards the middle of the foundation pit; the capping beam extends along the upper end of the fender pile, and the top of the inclined steel pile is embedded in the capping beam.
Description
Technical Field
The utility model relates to the field of foundation pit support, in particular to a foundation pit support structure capable of constructing an inclined support before foundation pit excavation.
Background
In order to ensure the safety of the underground structure and the surrounding environment of the foundation pit, protective measures such as supporting and reinforcing are required to be adopted on the side wall and the periphery of the foundation pit. The existing foundation pit supporting system generally comprises a circle of fender piles arranged around the edge of a foundation pit, capping beams extending along the upper ends of the fender piles and horizontal supporting beams arranged between the capping beams, wherein the fender piles are generally formed by a plurality of sequentially meshed and connected cement soil mixing piles; the capping beam is formed by pouring concrete, and the upper ends of the cement soil mixing piles forming the enclosure pile are connected into a whole; the horizontal supporting beams are supported between the capping beams on two opposite sides of the foundation pit, so that the foundation pit is supported, and the supporting strength of a foundation pit supporting system is ensured. The current foundation pit supporting system adopts the horizontal supporting beam to support, and for a large-area foundation pit, the length of the horizontal supporting beam is long, so that the manufacturing cost of the horizontal supporting beam is high, and on the other hand, the horizontal supporting beam stretches across the foundation pit, and a plurality of upright columns for supporting the horizontal supporting beam are required to be arranged below the horizontal supporting beam, so that the occupied space is large, and the foundation pit supporting system is not beneficial to earth excavation and foundation pit main structure operation.
In order to solve the defects of a foundation pit supporting system adopting a horizontal supporting beam for supporting, some foundation pits can adopt inclined supports at present, and the inclined supports can effectively solve the problems that the horizontal supports occupy large space and are not beneficial to earth excavation and foundation pit main structure operation; however, the existing diagonal bracing cannot be constructed before foundation pit excavation, and guard piles and capping beams need to be constructed first; then, basin-type excavation is adopted, namely, soil in the middle of the foundation pit is excavated, large-area back pressure soil is reserved at the edge of the foundation pit to resist the soil pressure, and then a middle and large bottom plate of the foundation pit is poured; then, after the outer side of the large bottom plate in the foundation pit is poured, erecting an inclined support, and then excavating the reserved soil on the side of the foundation pit below the inclined support; therefore, when the excavation operation of the foundation pit is carried out to a certain extent, the excavation operation needs to be stopped, the construction erection of the inclined strut is carried out again, and then the excavation operation is carried out again, the scheduling of various construction equipment and the arrangement of different operators need to be involved in the process, so that the construction period can be prolonged; in addition, in the excavation operation process of the foundation pit, attention needs to be paid to the soil layer to be reserved on the side of the foundation pit, and once the soil layer to be reserved on the side of the foundation pit is too much excavated, the fender pile can be bent, cracked and even broken under the action of the pressure of the surrounding soil. On the other hand, in the process of digging reserved soil beside a foundation pit, the excavator and the earth moving vehicle inevitably roll from a large bottom plate of a constructed in-pit structure, so that the finished area is damaged.
Disclosure of Invention
The utility model aims to provide a foundation pit enclosure structure which can complete construction of an inclined support pile before foundation pit excavation, so that foundation pit excavation operation can be completed at one time under the condition of ensuring the stability of foundation pit support, the construction process steps are optimized, and the total construction period of a foundation pit is shortened.
The technical scheme of the utility model is as follows:
a foundation pit enclosure structure capable of constructing diagonal braces before excavation of a foundation pit comprises:
the fender posts are distributed along the edge of the foundation pit;
the inclined support pile comprises a cement soil mixing pile arranged in a foundation pit soil layer on the inner side of the fender pile and an inclined steel pile inserted in the cement soil mixing pile, the cement soil mixing pile is distributed in an inclined manner, the upper end of the cement soil mixing pile is close to or intersected with the upper end of the fender pile, the lower end of the cement soil mixing pile inclines towards the middle of the foundation pit, and the cement soil mixing pile and the inclined steel pile jointly form the inclined support pile;
the capping beam extends along the upper end of the fender pile, and the top of the inclined steel pile is embedded in the capping beam, so that the upper end of the fender pile and the upper end of the inclined support pile are connected into a whole through the capping beam.
The inclined support pile of the foundation pit support structure comprises a cement soil mixing pile arranged in a foundation pit soil layer on the inner side of the enclosure pile and an inclined steel pile inserted into the cement soil mixing pile, so that before foundation pit excavation, the cement soil mixing pile which is obliquely distributed is directly constructed in the foundation pit soil layer on the inner side of the enclosure pile, then the inclined steel pile is inserted into the cement soil mixing pile to form the inclined support pile, so that before the foundation pit excavation, construction is performed to form the inclined support pile, then the upper end of the enclosure pile and the upper end of the inclined support pile are connected into a whole through a top beam, so that construction of the inclined support pile is completed before the foundation pit excavation, and the top beam, the upper end of the enclosure pile and the upper end of the inclined support pile are connected into a whole to ensure stable foundation pit support; therefore, the excavation operation of the foundation pit can be completed at one time under the condition of ensuring the stability of the foundation pit support, then the structural large bottom plate of the foundation pit is constructed, step-by-step excavation is not needed, large-area back pressure soil is not needed to be reserved at the edge of the foundation pit to resist soil pressure, the construction process steps can be effectively optimized, the total construction period of the foundation pit is shortened, and meanwhile, the problem that the excavator and the earthwork vehicle inevitably need to roll from the constructed structural large bottom plate of the foundation pit, so that the finished area is damaged is avoided.
Preferably, the inclination angle of the soil cement mixing pile is 35 to 80 degrees.
Preferably, the inclination angle of the soil cement mixing pile is 60 degrees.
Preferably, the inclined steel pile is H-shaped steel or a round steel pipe or a square steel pipe or a steel lattice column.
Preferably, the lower end of the cement-soil mixing pile and the lower end of the inclined steel pile are both positioned below the elevation of the bottom of the foundation pit.
A foundation pit enclosure structure capable of constructing diagonal braces before excavation of a foundation pit comprises:
the fender posts are distributed along the edge of the foundation pit;
the inclined support piles comprise inclined steel piles inserted into a foundation pit soil layer on the inner side of the fender pile, the inclined steel piles are distributed in an inclined mode, the upper ends of the inclined steel piles are close to or intersected with the upper end of the fender pile, the lower ends of the inclined steel piles incline towards the middle of the foundation pit, and the inclined steel piles form the inclined support piles;
the capping beam extends along the upper end of the fender pile, and the top of the inclined steel pile is embedded in the capping beam, so that the upper end of the fender pile and the upper end of the inclined support pile are connected into a whole through the capping beam.
The foundation pit support structure is suitable for foundation pits with softer soil, wherein the inclined support piles comprise inclined steel piles inserted into foundation pit soil layers on the inner sides of the support piles, so that before foundation pit excavation, the inclined steel piles are directly inserted into the foundation pit soil layers on the inner sides of the support piles to form the inclined support piles through construction before the foundation pit excavation, then the upper ends of the support piles and the upper ends of the inclined support piles are connected into a whole through the top compression beam, construction of the inclined support piles is completed before the foundation pit excavation, and the top compression beam, the upper ends of the support piles and the upper ends of the inclined support piles are connected into a whole to ensure stable foundation pit support; therefore, the excavation operation of the foundation pit can be completed at one time under the condition of ensuring the stability of the foundation pit support, then the structural large bottom plate of the foundation pit is constructed, step-by-step excavation is not needed, large-area back pressure soil is not needed to be reserved at the edge of the foundation pit to resist soil pressure, the construction process steps can be effectively optimized, the total construction period of the foundation pit is shortened, and meanwhile, the problem that the excavator and the earthwork vehicle inevitably need to roll from the constructed structural large bottom plate of the foundation pit, so that the finished area is damaged is avoided.
Preferably, the inclination angle of the soil cement mixing pile is 35 to 80 degrees.
Preferably, the inclination angle of the soil cement mixing pile is 60 degrees.
Preferably, the inclined steel pile is H-shaped steel or a round steel pipe or a square steel pipe or a steel lattice column.
Preferably, the lower end of the cement-soil mixing pile and the lower end of the inclined steel pile are both positioned below the elevation of the bottom of the foundation pit.
The utility model has the beneficial effects that: the construction of the inclined supporting pile can be completed before the foundation pit is excavated, so that the foundation pit excavation operation can be completed at one time under the condition that the foundation pit is stably supported, the construction process steps are optimized, and the total construction period of the foundation pit is shortened.
Drawings
Fig. 1 is a schematic structural diagram of a foundation pit enclosure supported by using an inclined support pile before excavation of the foundation pit according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a foundation pit enclosure supported by using an inclined support pile according to a first embodiment of the present invention after the foundation pit is excavated to the bottom elevation of the foundation pit.
In the figure:
a fender post 1;
the inclined support pile 2, the cement soil mixing pile 2.1 and the inclined steel pile 2.2;
a capping beam 3.
Detailed Description
The first embodiment is as follows: as shown in fig. 1 and 2, a foundation pit enclosure supported by inclined support piles comprises a guard pile 1, an inclined support pile 2 and a capping beam 3. The fender posts are distributed along the edge of the foundation pit. In this embodiment, the fender post is formed by a plurality of mixing posts which are engaged and connected in sequence. The capping beams extend along the upper ends of the fender piles, and in the embodiment, the capping beams are formed by pouring concrete, and the capping beams connect the upper ends of the mixing piles forming the fender piles into a whole. The inclined support pile comprises a cement soil mixing pile 2.1 arranged in a foundation pit soil layer on the inner side of the fender pile and an inclined steel pile 2.2 inserted in the cement soil mixing pile. The cement-soil mixing piles are distributed in an inclined mode, the upper ends of the cement-soil mixing piles are close to the upper ends of the fender posts or are intersected with the upper ends of the fender posts, and the lower ends of the cement-soil mixing piles incline towards the middle of the foundation pit. The inclination angle of the inclined steel pile is consistent with that of the cement soil mixing pile. The cement soil mixing pile and the inclined steel pile jointly form an inclined support pile. In this embodiment, the upper end of the oblique steel pile is located above the ground. The top of the inclined steel pile is embedded in the capping beam, so that the upper end of the enclosure pile and the upper end of the inclined support pile are connected into a whole through the capping beam.
The inclined support pile for foundation pit enclosure comprises a cement soil mixing pile arranged in a foundation pit soil layer on the inner side of the enclosure pile and an inclined steel pile inserted into the cement soil mixing pile, so that the cement soil mixing pile distributed in an inclined mode is constructed in the foundation pit soil layer on the inner side of the enclosure pile before foundation pit excavation can be achieved, then the inclined steel pile is inserted into the cement soil mixing pile to form the inclined support pile, the upper end of the enclosure pile and the upper end of the inclined support pile are connected into a whole through a top pressing beam, construction of the inclined support pile is achieved before foundation pit excavation, the top pressing beam, the upper end of the enclosure pile and the upper end of the inclined support pile are connected into a whole, and foundation pit support stability is guaranteed; therefore, the excavation operation of the foundation pit can be completed at one time under the condition of ensuring the stability of the foundation pit support, then the structural large bottom plate of the foundation pit is constructed, step-by-step excavation is not needed, large-area back pressure soil is not needed to be reserved at the edge of the foundation pit to resist soil pressure, the construction process steps can be effectively optimized, the total construction period of the foundation pit is shortened, and meanwhile, the problem that the excavator and the earthwork vehicle inevitably need to roll from the constructed structural large bottom plate of the foundation pit, so that the finished area is damaged is avoided.
In this embodiment, the inclination angle of the soil cement mixing pile is 35 to 80 degrees, for example, the inclination angle of the soil cement mixing pile is 60 degrees. The inclination angle of the cement soil mixing pile refers to an included angle between the cement soil mixing pile and a horizontal plane.
The inclined steel pile is H-shaped steel or a round steel pipe or a square steel pipe or a steel lattice column.
In this embodiment, the lower extreme of cement mixing pile and the lower extreme of oblique steel pile all are located the below of foundation ditch bottom elevation.
The second concrete embodiment is a foundation pit enclosure structure capable of constructing inclined supports before foundation pit excavation, and the foundation pit enclosure structure comprises enclosure piles, inclined support piles and capping beams. The fender posts are distributed along the edge of the foundation pit. In this embodiment, the fender post is formed by a plurality of mixing posts which are engaged and connected in sequence. The capping beams extend along the upper ends of the fender piles, and in the embodiment, the capping beams are formed by pouring concrete, and the capping beams connect the upper ends of the mixing piles forming the fender piles into a whole. The inclined support pile comprises an inclined steel pile inserted in a foundation pit soil layer on the inner side of the fender pile, the inclined steel pile is obliquely distributed, the upper end of the inclined steel pile is close to the upper end of the fender pile or intersected with the upper end of the fender pile, and the lower end of the inclined steel pile inclines towards the middle of the foundation pit. The inclined steel piles form inclined supporting piles. The top of the inclined steel pile is embedded in the capping beam, so that the upper end of the enclosure pile and the upper end of the inclined support pile are connected into a whole through the capping beam.
The foundation pit support structure is suitable for foundation pits with softer soil, wherein the inclined support piles comprise inclined steel piles inserted into foundation pit soil layers on the inner sides of the support piles, so that before foundation pit excavation, the inclined steel piles are directly inserted into the foundation pit soil layers on the inner sides of the support piles to form the inclined support piles through construction before the foundation pit excavation, then the upper ends of the support piles and the upper ends of the inclined support piles are connected into a whole through the top compression beam, construction of the inclined support piles is completed before the foundation pit excavation, and the top compression beam, the upper ends of the support piles and the upper ends of the inclined support piles are connected into a whole to ensure stable foundation pit support; therefore, the excavation operation of the foundation pit can be completed at one time under the condition of ensuring the stability of the foundation pit support, then the structural large bottom plate of the foundation pit is constructed, step-by-step excavation is not needed, large-area back pressure soil is not needed to be reserved at the edge of the foundation pit to resist soil pressure, the construction process steps can be effectively optimized, the total construction period of the foundation pit is shortened, and meanwhile, the problem that the excavator and the earthwork vehicle inevitably need to roll from the constructed structural large bottom plate of the foundation pit, so that the finished area is damaged is avoided.
In this embodiment, the inclination angle of the soil cement mixing pile is 35 to 80 degrees, for example, the inclination angle of the soil cement mixing pile is 60 degrees. The inclination angle of the cement soil mixing pile refers to an included angle between the cement soil mixing pile and a horizontal plane.
The inclined steel pile is H-shaped steel or a round steel pipe or a square steel pipe or a steel lattice column.
In this embodiment, the lower extreme of cement mixing pile and the lower extreme of oblique steel pile all are located the below of foundation ditch bottom elevation.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a can be before foundation ditch excavation the foundation ditch retaining structure of construction bearing diagonal, characterized by includes:
the fender posts are distributed along the edge of the foundation pit;
the inclined support pile comprises a cement soil mixing pile arranged in a foundation pit soil layer on the inner side of the fender pile and an inclined steel pile inserted in the cement soil mixing pile, the cement soil mixing pile is distributed in an inclined manner, the upper end of the cement soil mixing pile is close to or intersected with the upper end of the fender pile, the lower end of the cement soil mixing pile inclines towards the middle of the foundation pit, and the cement soil mixing pile and the inclined steel pile jointly form the inclined support pile;
the capping beam extends along the upper end of the fender pile, and the top of the inclined steel pile is embedded in the capping beam, so that the upper end of the fender pile and the upper end of the inclined support pile are connected into a whole through the capping beam.
2. The foundation pit support structure capable of constructing the inclined struts before foundation pit excavation according to claim 1, wherein the inclination angle of the cement-soil mixing pile is 35-80 degrees.
3. The foundation pit support structure capable of constructing the diagonal bracing before foundation pit excavation according to claim 2, wherein the inclination angle of the cement-soil mixing pile is 60 degrees.
4. A foundation pit enclosure structure capable of being constructed with diagonal braces before excavation of a foundation pit as claimed in claim 1, 2 or 3, wherein the diagonal steel piles are H-shaped steel or round steel pipes or square steel pipes or steel lattice columns.
5. A foundation pit enclosure structure capable of being constructed with diagonal braces before excavation of a foundation pit as claimed in claim 1, 2 or 3, wherein the lower ends of the cement-soil mixing piles and the lower ends of the diagonal steel piles are located below the elevation of the bottom of the foundation pit.
6. The utility model provides a can be before foundation ditch excavation the foundation ditch retaining structure of construction bearing diagonal, characterized by includes:
the fender posts are distributed along the edge of the foundation pit;
the inclined support pile comprises inclined steel piles inserted into a foundation pit soil layer on the inner side of the fender pile, the inclined steel piles are distributed in an inclined mode, the upper end of each inclined steel pile is close to or intersected with the upper end of the fender pile, the lower end of each inclined steel pile inclines towards the middle of the foundation pit, and each inclined steel pile forms an inclined support pile;
the capping beam extends along the upper end of the fender pile, and the top of the inclined steel pile is embedded in the capping beam, so that the upper end of the fender pile and the upper end of the inclined support pile are connected into a whole through the capping beam.
7. The foundation pit support structure capable of constructing the diagonal braces before excavation of the foundation pit as claimed in claim 6, wherein the inclination angle of the diagonal steel piles is 35-80 degrees.
8. The enclosure for a foundation pit capable of constructing a diagonal brace before excavation of the foundation pit according to claim 7, wherein the inclination angle of the diagonal steel piles is 60 degrees.
9. A foundation pit enclosure structure capable of being used for constructing diagonal braces before excavation of a foundation pit according to claim 6, 7 or 8, wherein the diagonal steel piles are H-shaped steel or round steel pipes or square steel pipes or steel lattice columns.
10. A foundation pit enclosure structure capable of being constructed with diagonal braces before excavation of a foundation pit as claimed in claim 6, 7 or 8, wherein the lower ends of the diagonal steel piles and the lower ends of the diagonal steel piles are located below the elevation of the bottom of the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220065967.8U CN216999743U (en) | 2022-01-11 | 2022-01-11 | Foundation pit enclosure structure capable of constructing inclined support before excavation of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220065967.8U CN216999743U (en) | 2022-01-11 | 2022-01-11 | Foundation pit enclosure structure capable of constructing inclined support before excavation of foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216999743U true CN216999743U (en) | 2022-07-19 |
Family
ID=82390053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220065967.8U Active CN216999743U (en) | 2022-01-11 | 2022-01-11 | Foundation pit enclosure structure capable of constructing inclined support before excavation of foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216999743U (en) |
-
2022
- 2022-01-11 CN CN202220065967.8U patent/CN216999743U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106522241A (en) | Deep foundation pit supporting method of ultrahigh floor height type basement structure | |
| CN109356169B (en) | Foundation pit row pile supporting system and construction method thereof | |
| CN109024662A (en) | Method of the anchor pile underpinning without basement building underground space increasing layer | |
| CN205975658U (en) | Steel platform tower crane foundation | |
| CN205024712U (en) | Modular tower crane basis | |
| CN110777802A (en) | Deep foundation pit high-low span supporting structure and construction method thereof | |
| CN101498133B (en) | Method and supporting construction for enlarging basement top-down method earth excavation space | |
| CN216041201U (en) | Earlier prop and dig double-deck diagonal bracing foundation ditch enclosure system afterwards | |
| CN105064711A (en) | Method for constructing underground garage between residential buildings | |
| CN114622567A (en) | Foundation pit enclosure supported by inclined piles and construction method thereof | |
| CN113417300A (en) | Slope support system and construction method thereof | |
| CN108035360A (en) | A kind of method for pattern foundation pit supporting structure | |
| CN216999743U (en) | Foundation pit enclosure structure capable of constructing inclined support before excavation of foundation pit | |
| CN210002410U (en) | ring frame support enclosure system capable of being used as retaining wall | |
| CN116289979A (en) | Deep foundation pit supporting construction method for underground forward and reverse synchronous construction | |
| CN212052780U (en) | Oblique supporting type deep foundation pit supporting structure | |
| CN114427229A (en) | Deep foundation pit diagonal bracing supporting structure and diagonal bracing supporting method thereof | |
| CN216999747U (en) | Combined foundation pit inclined pile structure for supporting foundation pit | |
| CN113653064A (en) | Front-support rear-pull type foundation pit enclosure system and construction method thereof | |
| CN111075452A (en) | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method | |
| CN111270681A (en) | Construction method and structure of support structure suitable for crossing foundation pit pipeline group | |
| CN219732023U (en) | Fender pile and steel diagonal bracing fender structure | |
| CN218373894U (en) | Prestressed inclined throwing support | |
| CN216948301U (en) | Supporting structure of foundation pit | |
| CN219604680U (en) | Novel four-limb steel tube lattice column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |