CN217325390U - Retaining structure of foundation pit - Google Patents
Retaining structure of foundation pit Download PDFInfo
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- CN217325390U CN217325390U CN202220371819.9U CN202220371819U CN217325390U CN 217325390 U CN217325390 U CN 217325390U CN 202220371819 U CN202220371819 U CN 202220371819U CN 217325390 U CN217325390 U CN 217325390U
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Abstract
The utility model provides an envelope of foundation ditch, include: the guard posts are arranged around the foundation pit to be formed at intervals, and the top elevation of each guard post is lower than the ground elevation; pouring a crown beam formed on the top surface of the fender post; several concrete supports supported between the opposite crown beams; the retaining wall is vertically arranged on the top surface of the crown beam, and the elevation of the top of the retaining wall is higher than that of the ground; the fender pile includes that the interval sets up in the steel-pipe pile around waiting to form the foundation ditch and pours the bored concrete pile that forms in the top of steel-pipe pile, and the top of a plurality of steel-pipe piles is buried underground in the bored concrete pile. The utility model discloses an adopt steel-pipe pile and bored concrete pile according to the soil property of stratum for the shaping of each high department steel-pipe pile and bored concrete pile is efficient, has improved the completion efficiency of construction, has avoided chiseling the rock stratum, has reduced the construction degree of difficulty, has practiced thrift construction cost.
Description
Technical Field
The utility model relates to a construction technical field relates to an envelope of foundation ditch particularly.
Background
When a subway station is built on a hard rock layer or a composite stratum with soft top and hard bottom and the like, and open excavation or cover excavation construction is adopted, a fender post is generally constructed firstly, and then excavation supporting and main structure construction of a foundation pit are carried out in a layered and segmented mode under a comprehensive protection system of the fender post, an inner support or an outer anchor cable. Because the upper soil layer in the composite stratum is weak, but the strength of the lower rock stratum is high, when the whole foundation pit is constructed by using methods such as cast-in-situ bored piles and the like to construct the enclosure structure, the hole forming efficiency is low, the construction cost is high, the rock stratum with high strength and good integrity is chiseled out in the conventional construction method and is replaced by reinforced concrete with a lower standard, the construction difficulty and the material consumption are increased, and the overall idea of energy conservation and environmental protection is not met. If the forms of foot hanging piles, slope placing, excavation and the like are adopted, the method is limited by factors such as site conditions, surrounding environments and the like, and the applicability is low.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, the utility model provides a retaining structure of foundation ditch has solved traditional construction well boring inefficiency, the high and limited technical problem in place of construction cost, adopts steel-pipe pile and bored concrete pile through the soil property according to the stratum for the shaping efficiency of each high department steel-pipe pile and bored concrete pile is high, has improved the completion efficiency of construction, has avoided chiseling the rock stratum, has reduced the construction degree of difficulty, has practiced thrift construction cost.
In order to realize the purpose, the utility model adopts the technical proposal that:
a building envelope for a foundation pit, comprising:
the guard posts are arranged around the foundation pit to be formed at intervals, and the top elevation of each guard post is lower than the ground elevation;
pouring a crown beam formed on the top surface of the fender post;
several concrete supports supported between the opposite crown beams; and
and the retaining wall is vertically arranged on the top surface of the crown beam, and the elevation of the top of the retaining wall is higher than the elevation of the ground.
The utility model discloses envelope's of foundation ditch further improvement lies in, and the fender pile is including the steel-pipe pile that is located the bottom and pour the bored concrete pile that is formed at the top of steel-pipe pile, and the top of a plurality of steel-pipe piles is buried underground in the bored concrete pile.
The utility model discloses the envelope's of foundation ditch further improvement lies in, and the size of the cross section of this bored concrete pile is greater than the size of the cross section of this steel-pipe pile, and this bored concrete pile pours the top that is formed at a plurality of these steel-pipe piles.
The utility model discloses envelope's of foundation ditch further improvement lies in, still including the steel reinforcement cage that is fixed in the top of steel-pipe pile, and the position that corresponds the steel reinforcement cage is pour and is formed the bored concrete pile.
The utility model discloses the envelope's of foundation ditch further improvement lies in, still includes that a plurality of steels that are fixed in this fender pile's lateral part along the direction of height interval of this foundation ditch enclose the purlin and shore a plurality of steel shotcrete between relative steel encloses the purlin.
The utility model discloses the envelope's of foundation ditch further improvement lies in, still includes and sets up and be a plurality of anchor ropes of slope form along the direction of height interval of foundation ditch, and the one end of anchor rope is fixed in the ground and other end fixed connection in fender pile.
The utility model discloses the envelope's of foundation ditch further improvement lies in, still including pouring the capping beam that is formed at one side that the top of this fender pile is close to the foundation ditch, the top surface of this capping beam and the top surface parallel and level of this bored concrete pile, and the top surface that is formed at this fender pile and this capping beam is pour to this crown beam.
The utility model discloses the envelope's of foundation ditch further improvement lies in, still includes the concrete layer of spraying in the side that this fender pile is close to this foundation ditch.
The utility model discloses the envelope's of foundation ditch further improvement lies in, still including forming the waterproof layer that is close to the side of this foundation ditch in this concrete layer.
The utility model discloses the envelope's of foundation ditch further improvement lies in, still keeps away from the structural layer of this concrete layer's side including pouring to be formed at this waterproof layer.
The utility model discloses the envelope of foundation ditch is through the soil property condition according to waiting to excavate the not co-altitude department of foundation ditch, and the steel-pipe pile that designs into adds the enclosure of bored concrete pile and forms, has avoided single steel-pipe pile or bored concrete pile to be difficult to be suitable for complicated topography in traditional construction, and a large amount of resources drop into when this mode has also avoided complicated topography construction, can make full use of the characteristics of own of steel-pipe pile and bored concrete pile, reduced the construction degree of difficulty, just the utility model discloses a hat roof beam and retaining wall have also avoided the influence to the surrounding environment in the foundation ditch construction, have improved the feature of environmental protection of construction.
Drawings
Fig. 1 is the utility model discloses the building envelope's of foundation ditch cross-sectional view.
Fig. 2 is the utility model discloses the schematic diagram of anchor rope among the envelope of foundation ditch.
Fig. 3 is a sectional view of one construction case a-a of fig. 1.
Fig. 4 is the cross-sectional view of the joint of the steel pipe pile and the cast-in-place pile in the construction case of the utility model.
Fig. 5 is a cross-sectional view of the joint of a steel pipe pile and a cast-in-place pile in another construction case of the present invention.
The correspondence of reference numerals to components is as follows: the steel pipe pile comprises a steel pipe pile 1, a cast-in-place pile 2, a reinforcement cage 21, a filling layer 22, a capping beam 3, a crown beam 4, a retaining wall 5, a concrete support 6, a steel support 7, a steel purlin 71, an anchor cable 8, a concrete layer 91, a waterproof layer 92 and a structural layer 93.
Detailed Description
To facilitate understanding of the present invention, the following description is made with reference to the accompanying drawings and examples.
Referring to fig. 1 to 2, the present invention provides a support structure for a foundation pit, including:
the guard posts are arranged around the foundation pit to be formed at intervals, and the top elevation of each guard post is lower than the ground elevation;
pouring a crown beam 4 formed on the top surface of the fender post;
a plurality of concrete supports 6 supported between the opposite crown beams 4; and
and the retaining wall is vertically arranged on the top surface of the crown beam, and the elevation of the top of the retaining wall is higher than the elevation of the ground.
The utility model discloses a retaining structure's of foundation ditch preferred embodiment does, as shown in fig. 1, the fender pile is including being located the steel-pipe pile 1 of bottom and pour the bored concrete pile 2 that is formed at the top of steel-pipe pile 1, and the top of a plurality of steel-pipe piles 1 is buried underground in bored concrete pile 2.
The utility model discloses the envelope of foundation ditch is through the soil property condition according to waiting to excavate the different height department of foundation ditch, and the enclosure that designs into steel-pipe pile 1 and bored concrete pile 2 forms, has avoided single steel-pipe pile 1 or bored concrete pile 2 to be difficult to be suitable for complicated topography in traditional construction, and a large amount of resources drop into when this mode has also avoided complicated topography construction, can make full use of steel-pipe pile 1 and bored concrete pile 2's own characteristic, reduced the construction degree of difficulty, just the utility model discloses a hat roof beam 4 and retaining wall 5 have also avoided the influence to the surrounding environment in the foundation ditch construction, have improved the feature of environmental protection of construction.
Preferably, the bottom surface of retaining wall 5 keeps away from the lateral part of foundation ditch is provided with water drainage tank, conveniently discharges the waste water of foundation ditch construction.
Further, the cross section size of the cast-in-place pile 2 is larger than that of the steel pipe piles 1, the cast-in-place pile 2 is formed on the tops of the steel pipe piles 1 in a cast-in-place mode, and the top portions of the steel pipe piles 1 are partially embedded in the cast-in-place pile 2.
Specifically, as shown in fig. 3, the cast-in-place pile further includes a reinforcement cage 21 fixed to the top of the steel pipe pile 1, and the cast-in-place pile 2 is formed by casting at a position corresponding to the reinforcement cage 21.
Further, as shown in fig. 1, the foundation pit support structure further comprises a plurality of steel purlins 71 fixed on the side portions of the fender posts at intervals along the height direction of the foundation pit, and a plurality of steel supports 7 supported between the opposite steel purlins 71.
Preferably, concrete brace 6 shore in the top that is located bored concrete pile 2, conveniently improves the support effort to the foundation ditch, is less than the position use steel shotcrete 7 of the top elevation of bored concrete pile 2, has made things convenient for the support of foundation ditch also to make things convenient for the foundation ditch construction to accomplish the back, and the dismantlement and the recycling of steel shotcrete have improved the utilization ratio of resource.
Preferably, as shown in fig. 3, 4 and 5, concrete is further filled between two adjacent cast-in-place piles 2 to form a filling layer 22, and one cast-in-place pile 2 corresponds to three steel pipe piles 1 or four steel pipe piles 1, so that connectivity between two adjacent cast-in-place piles 2 is improved, and a gap between two adjacent cast-in-place piles 2 is avoided, thereby affecting stability of the foundation pit.
Preferably, the steel pipe pile 1 is arranged in a weathered stratum, and the steel pipes below the steel pipe pile are utilized, so that the resistance to the weathered stratum is improved, and the subsequent forming of the steel pipe pile 1 is facilitated.
Further, as shown in fig. 2, the foundation pit structure further comprises a plurality of inclined anchor cables 8 which are arranged at intervals in the height direction of the foundation pit, one end of each anchor cable 8 is fixed in the foundation, the other end of each anchor cable 8 is fixedly connected to the fender pile, and the stability of the steel pipe pile 1 and the stability of the cast-in-place pile 2 are improved conveniently through the anchor cables 8.
Further, as shown in fig. 1, the method further comprises a capping beam 3 formed by pouring on one side of the top of the fender pile close to the foundation pit, the top surface of the capping beam 3 is flush with the top surface of the cast-in-place pile 2, and a crown beam 4 is formed by pouring on the top surfaces of the fender pile and the capping beam 3.
Further, as shown in fig. 3, the concrete layer 91 sprayed on the side surface of the fender pile close to the foundation pit is further included, so that the indicated flatness of the steel pipe pile 1 and the cast-in-place pile 2 is improved.
Further, as shown in fig. 3, the waterproof layer 92 formed on the side surface of the concrete layer 91 close to the foundation pit is further included, so that the waterproof performance of the foundation pit is improved.
Further, as shown in fig. 3, the foundation pit support structure further comprises a structural layer 93 which is formed on the side surface, far away from the concrete layer 1, of the waterproof layer 92 in a pouring mode, so that the thickness of the foundation pit support structure is improved, and the strength of the foundation pit is improved.
The utility model discloses a concrete implementation case of enclosure structure of foundation ditch is, anchor a plurality of anchor cables 8 in the lateral part of waiting to form the foundation ditch aslope, the position of waiting to form the lateral part of foundation ditch and corresponding weathering stratum is beaten and is established and form a plurality of steel-pipe pile 1, the lateral part of steel-pipe pile 1 and the tip fixed connection of corresponding anchor cable 8, put steel reinforcement cage 21 at the top of a plurality of steel-pipe pile 1, steel reinforcement cage 21 and the top part fixed connection of steel-pipe pile 1, and corresponding the position of steel reinforcement cage 21 pours and forms a plurality of bored concrete pile 2, the lateral part of bored concrete pile 2 and the tip fixed connection of corresponding anchor cable 8, bored concrete pile 2 and steel-pipe pile 1 form the fender pile, pour concrete between two adjacent bored concrete pile 2 and form filling layer 22, pour back timber 3 in the lateral part of this bored concrete pile 2, the top elevation of this back timber 3 is parallel and level with the top elevation of this bored concrete pile 2, pour crown beam 4 in the top face of bored concrete pile 2 and back timber 3, prop up a plurality of concrete supports 6 in the lateral part that the bored concrete pile 2 was kept away from to hat roof beam 4, pour in the top surface of hat roof beam 4 and form the retaining wall 5 that supplies to enclose the fender foundation ditch, the bottom surface of the lateral part of keeping away from the foundation ditch in retaining wall 5 is provided with water drainage tank, excavate the region that steel-pipe pile 1 and bored concrete pile 2 enclose, and enclose purlin 71 fixed connection in the lateral wall of fender pile with the steel along with the degree of depth of excavation, prop up a plurality of steel supports 7 interval between relative steel purlin 71, form concrete layer 91 in the side spraying concrete that steel-pipe pile 1 and bored concrete pile 2 are close to the foundation ditch, form waterproof layer 92 in the side pouring that concrete layer 91 is close to the foundation ditch, form structural layer 93 in the side pouring that waterproof layer 92 is kept away from concrete layer 1, thereby form the foundation ditch.
The present invention has been described in detail with reference to the drawings and the embodiments, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.
Claims (10)
1. The utility model provides a building envelope of foundation ditch which characterized in that includes:
the device comprises a plurality of fender posts which are arranged at intervals around a foundation pit to be formed, wherein the top elevation of each fender post is lower than the ground elevation;
pouring a crown beam formed on the top surface of the fender post;
a plurality of concrete supports supported between the opposite crown beams; and
and the retaining wall is vertically arranged on the top surface of the crown beam, and the elevation of the top of the retaining wall is higher than the elevation of the ground.
2. The enclosure structure of a foundation pit according to claim 1, wherein the enclosure piles comprise steel pipe piles arranged at intervals around the foundation pit to be formed and cast-in-place piles cast at the tops of the steel pipe piles, and the tops of the steel pipe piles are embedded in the cast-in-place piles.
3. The enclosure structure of a foundation pit according to claim 2, wherein the size of the cross section of the cast-in-place pile is larger than that of the cross section of the steel pipe piles, and the cast-in-place pile is cast and formed at the tops of the steel pipe piles.
4. The enclosure structure of a foundation pit according to claim 3, characterized by further comprises a reinforcement cage fixed to the top of the steel pipe pile, and the cast-in-place pile is formed by casting at a position corresponding to the reinforcement cage.
5. The enclosure structure of the foundation pit according to claim 1, further comprising a plurality of steel purlins fixed to the side portions of the fender piles at intervals in the height direction of the foundation pit and a plurality of steel supports supported between the opposite steel purlins.
6. The enclosure structure of the foundation pit according to claim 1, further comprising a plurality of inclined anchor cables spaced apart in the height direction of the foundation pit, wherein one end of each anchor cable is fixed in the foundation and the other end of each anchor cable is fixedly connected to the enclosure pile.
7. The enclosure structure of a foundation pit according to claim 2, further comprising a capping beam cast on one side of the top of the enclosure pile near the foundation pit, wherein the top surface of the capping beam is flush with the top surface of the cast-in-place pile, and the top beam is cast on the top surfaces of the enclosure pile and the capping beam.
8. The enclosure of the foundation pit of claim 1, further comprising a concrete layer sprayed on the side of the fender post near the foundation pit.
9. The enclosure of a foundation pit of claim 8, further comprising a waterproof layer formed on the concrete layer adjacent to the side of the foundation pit.
10. The enclosure of a foundation pit of claim 9, further comprising a structural layer cast on the side of the waterproof layer away from the concrete layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220371819.9U CN217325390U (en) | 2022-02-21 | 2022-02-21 | Retaining structure of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220371819.9U CN217325390U (en) | 2022-02-21 | 2022-02-21 | Retaining structure of foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217325390U true CN217325390U (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220371819.9U Active CN217325390U (en) | 2022-02-21 | 2022-02-21 | Retaining structure of foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217325390U (en) |
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2022
- 2022-02-21 CN CN202220371819.9U patent/CN217325390U/en active Active
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