CN216428283U - Sand cobble geology deep basal pit supporting construction under complicated environmental condition - Google Patents
Sand cobble geology deep basal pit supporting construction under complicated environmental condition Download PDFInfo
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- CN216428283U CN216428283U CN202122510007.6U CN202122510007U CN216428283U CN 216428283 U CN216428283 U CN 216428283U CN 202122510007 U CN202122510007 U CN 202122510007U CN 216428283 U CN216428283 U CN 216428283U
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Abstract
The utility model discloses a sandy cobble geological deep foundation pit supporting structure under complex environmental conditions, which comprises a supporting pile component, an inner supporting component and a prestressed anchor cable component; the supporting pile component is arranged around the sandy gravel geological deep foundation pit, is used for reinforcing the periphery of the foundation pit and plays a role of a waterproof curtain at the same time; the prestressed anchor cable assembly is arranged in the supporting pile assembly and the sandy gravel geological deep foundation pit in a penetrating mode and is used for reinforcing connection between the supporting pile and the periphery of the foundation pit and enhancing integrity of a supporting structure; the inner support assemblies are arranged in multiple numbers and located on the outer side face of the support pile assembly, and are used for supporting the support pile assembly and resisting lateral displacement around the foundation pit. The utility model discloses strengthened supporting construction's overall stability, improved the stability of sand cobble geology deep basal pit and the ability of resisting groundwater influence, reduced the construction degree of difficulty for engineering construction process has reduced engineering cost.
Description
Technical Field
The utility model belongs to the technical field of complex environment's excavation supporting, concretely relates to sand cobble geology deep basal pit supporting construction under complex environmental condition.
Background
With the continuous development of economic society of China, the urbanization process is accelerated continuously, the construction of infrastructure is more and more emphasized by various cities, various deep foundation pits are developed in the construction process of the infrastructure, and the deep foundation pits are developed towards deeper depth and larger span. A series of major difficult problems are accompanied in the construction process of the deep foundation pit, and particularly the supporting problem of the sandy gravel geological deep foundation pit under the complex environmental condition needs to be solved urgently. The sandy gravel stratum contains unstable strata which are caused by a plurality of factors such as loose stratum rock mass, poor self-stability, large individual strength of stones, no cementation, large gaps among particles, small cohesive force, high permeability coefficient and complex stress. In the process of excavating and supporting the sandy gravel geological deep foundation pit, the soil around the foundation pit is very easy to disturb, and particularly for the deep foundation pit in the city, the buildings around the foundation pit are erected, underground municipal pipelines are densely distributed, the surrounding traffic is busy, and the deep foundation pit is often influenced by underground water. If the disturbance of the excavation process of the foundation pit to the surrounding soil body is too large, the normal use of surrounding buildings, municipal underground pipe networks and the like is influenced, and meanwhile, the existence of underground water also has certain influence on the safety of the sandy gravel geological deep foundation pit.
SUMMERY OF THE UTILITY MODEL
In view of this, the main object of the utility model is to provide a deep excavation supporting construction of sandy cobble geology under complicated environmental condition.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the embodiment of the utility model provides a sandy cobble geology deep foundation pit supporting structure under complicated environmental condition, which comprises a supporting pile component, an inner supporting component and a prestressed anchor cable component;
the supporting pile assembly is arranged around the sandy gravel geological deep foundation pit, is used for reinforcing the periphery of the foundation pit and plays a role of a waterproof curtain;
the prestressed anchor cable assembly is arranged in the supporting pile assembly and the sandy gravel geological deep foundation pit in a penetrating mode and used for reinforcing connection between the supporting pile and the periphery of the foundation pit and enhancing integrity of a supporting structure;
the inner support component is provided with a plurality of support components and located on the outer side face of the support pile component, and the support components are used for supporting the support pile component and resisting lateral displacement around the foundation pit.
In the above scheme, the fender pile subassembly includes bored concrete pile, spouts stake, hat roof beam and hangs the net and sprays the layer soon, bored concrete pile sets up a plurality of and evenly arranges, arbitrary two along the sand cobble geology deep basal pit all around set up between the bored concrete pile and spout stake formation concrete continuous wall soon, arbitrary two spray through hanging the net and form a hat net and spray the layer between the bored concrete pile, every the top of bored concrete pile sets up the hat roof beam.
In the scheme, the positioning ribs are arranged on the outer sides of the steel bars in the cast-in-place piles.
In the scheme, the prestressed anchor cable assembly comprises a steel strand, a wedge-shaped cushion block, channel steel, a clamp and a gasket; the one end of steel strand wires runs through in the soil layer of sandy cobble geology deep basal pit through the stock, and the other end coupling jig is and run through the bored concrete pile of a fender pile subassembly, the channel-section steel sets up between anchor clamps and bored concrete pile, set up the gasket between anchor clamps and the channel-section steel.
In the scheme, the prestressed anchor cable assembly comprises a steel support and a steel enclosing purlin, the steel support is horizontally arranged, one end of the steel support is connected with the outer side of a cast-in-place pile of the supporting pile assembly through the steel enclosing purlin, and the other end of the steel support is connected with the outer side of the cast-in-place pile of the supporting pile assembly on the other side of the sandy gravel geological deep foundation pit through the steel enclosing purlin.
In the scheme, one end of the steel support is connected with the steel purlin through a bolt, and the steel purlin is connected with the outer side of the cast-in-place pile of the support pile assembly through a pre-buried bolt.
Compared with the prior art, the utility model discloses strengthened supporting construction's overall stability, improved the stability of sand cobble geology deep basal pit and the ability of resisting groundwater influence, reduced the construction degree of difficulty for engineering construction process has reduced engineering cost.
Drawings
The accompanying drawings, which are described herein, serve to disclose a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are used to explain the invention and not to constitute an undue limitation on the invention. In the drawings:
fig. 1 is a schematic structural view of a sandy gravel geological deep foundation pit supporting structure under a complex environmental condition, according to an embodiment of the present invention;
fig. 2 is a top view of a supporting pile assembly in a sandy gravel geological deep foundation pit supporting structure under a complex environmental condition, according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a cast-in-place pile of a supporting pile assembly in a sandy gravel geological deep foundation pit supporting structure under a complex environmental condition, according to an embodiment of the present invention;
fig. 4 is a left side view of fig. 1.
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.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplified description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.
The embodiment of the utility model provides a sandy cobble geology deep basal pit supporting structure under complicated environmental condition, as shown in fig. 1-4, including a supporting pile component, an inner supporting component and a prestressed anchorage cable component;
the supporting pile assembly is arranged around the sandy gravel geological deep foundation pit, is used for enhancing the stability of a soil body around the deep foundation pit and plays a role of a water stop curtain;
the prestressed anchor cable assembly is arranged in the supporting pile assembly and the sandy gravel geological deep foundation pit in a penetrating mode and used for enhancing the lateral movement resistance of the sandy gravel geological deep foundation pit and enhancing the structural integrity;
the inner support assembly is provided with a plurality of supporting assemblies and is positioned on the outer side face of the supporting pile assembly, the supporting pile assembly is used for supporting the supporting pile assembly, and the lateral displacement resistance of the structure is enhanced.
As shown in fig. 2, the supporting pile assembly comprises cast-in-place piles 1, jet grouting piles 2, crown beams 4 and a net hanging injection layer 12, wherein the cast-in-place piles 1 are provided with a plurality of piles and are uniformly arranged along the periphery of a sandy gravel geological deep foundation pit, the jet grouting piles 2 are arranged between any two cast-in-place piles 1 to form a concrete continuous wall 3, the net hanging injection layer 12 is formed between any two cast-in-place piles 1 through net hanging injection, and the crown beams 4 are arranged at the top of each cast-in-place pile 1.
The diameter of bored concrete pile 1 is 1.2m, and the inside reinforcing bar 15 of bored concrete pile 1 adopts C25, and the concrete strength grade is C30, and the jet grouting pile 2 diameter is 600 mm.
The cross-sectional dimension of the crown beam 4 is 800mm multiplied by 1000mm, and the steel bar in the crown beam 4 is C25.
As shown in fig. 3, the outside of the steel bar 15 in the cast-in-place pile 1 is provided with a positioning rib 16 for ensuring the thickness of the concrete protective layer.
The positioning ribs 16 are phi 20 and 540mm long.
The positioning ribs 16 are welded to the reinforcing bars 15.
And (2) driving rotary jet grouting piles 2 between the two cast-in-place piles 1 to form a concrete continuous wall 3, performing net hanging and injection construction between the cast-in-place piles 1, and driving crown beams 4 at the tops of the cast-in-place concrete piles 1 to enable the cast-in-place concrete piles 1, the rotary jet grouting piles 2, the crown beams 4 and the net hanging and injection layer 12 to form a whole, so that the stability of sandy gravel geology is enhanced, and meanwhile, the influence of underground water on the sandy gravel geology deep foundation pit is reduced.
The prestressed anchor cable assembly comprises a steel strand 7, a wedge-shaped cushion block 8, a channel steel 9, a clamp 10 and a gasket 11; the one end of steel strand wires 7 is passed through the stock and is run through in the soil layer of sandy cobble geology deep basal pit, and other end coupling jig 10 is and run through the bored concrete pile 1 of a fender pile subassembly, channel-section steel 9 sets up between anchor clamps 10 and bored concrete pile 1, set up gasket 11 between anchor clamps 10 and the channel-section steel 9.
The prestressed anchor cable assembly applies prestress to the soil body in a certain thickness range around the deep foundation pit, integrity is improved, and the capability of resisting lateral displacement of the deep foundation pit is improved.
As shown in fig. 1 and 4, the prestressed anchor cable assembly comprises a steel support 5 and a steel purlin 14, wherein the steel support 5 is horizontally arranged, one end of the steel support is connected with the outer side of the cast-in-place pile 1 of the support pile assembly through the steel purlin 14, the deformation of the side wall of the deep foundation pit is prevented, and the stability of the sandy gravel geological deep foundation pit is enhanced.
The steel support 5 is made of I-shaped steel.
One end of the steel support 5 is connected with the steel purlin 14 through a bolt 6, the steel purlin 14 is connected with the outer side of the cast-in-place pile 1 of the support pile assembly through a pre-embedded bolt 19, and the other end of the steel support 5 is fixed to the other side of the foundation pit in the same connection mode.
The prestressed anchor cable assemblies are arranged in two groups, one end of a steel support 5 of one group of prestressed anchor cable assemblies is connected with a steel purlin 14 through a bolt 6, and the steel purlin 14 is connected with a crown beam 4 of a cast-in-place pile 1 of a support pile assembly through a pre-buried bolt 19; one end of a steel support 5 of the other group of prestressed anchor cable assemblies is connected with a steel purlin 14 through a bolt 6, and the steel purlin 14 is connected with the lower side of the cast-in-place pile 1 of the support pile assembly through a pre-embedded bolt 19.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (6)
1. A sandy gravel geological deep foundation pit supporting structure under a complex environment condition is characterized by comprising a supporting pile assembly, an inner supporting assembly and a prestressed anchor cable assembly;
the supporting pile assembly is arranged around the sandy gravel geological deep foundation pit, is used for reinforcing the periphery of the foundation pit and plays a role of a waterproof curtain;
the prestressed anchor cable assembly is arranged in the supporting pile assembly and the sandy gravel geological deep foundation pit in a penetrating mode and used for reinforcing connection between the supporting pile and the periphery of the foundation pit and enhancing integrity of a supporting structure;
the inner support component is provided with a plurality of support components and located on the outer side face of the support pile component, and the support components are used for supporting the support pile component and resisting lateral displacement around the foundation pit.
2. The supporting structure for the sandy gravel geological deep foundation pit under the complex environmental condition of claim 1, wherein the supporting pile assembly comprises cast-in-place piles, jet grouting piles, crown beams and a net hanging injection layer, the cast-in-place piles are provided in a plurality of numbers and are uniformly arranged along the periphery of the sandy gravel geological deep foundation pit, the jet grouting piles are arranged between any two cast-in-place piles to form a concrete continuous wall, the net hanging injection layer is formed between any two cast-in-place piles through net hanging injection, and the crown beams are arranged at the top of each cast-in-place pile.
3. The sandy gravel geological deep foundation pit supporting structure under complex environmental conditions as defined in claim 2, wherein positioning ribs are provided on the outer sides of the reinforcing steel bars in the cast-in-place piles.
4. The sandy gravel geological deep foundation pit supporting structure under complex environmental conditions of claim 1, 2 or 3, wherein the prestressed anchor cable assembly comprises steel strands, wedge-shaped cushion blocks, channel steels, clamps and gaskets; the one end of steel strand wires runs through in the soil layer of sandy cobble geology deep basal pit through the stock, and the other end coupling jig is and run through the bored concrete pile of a fender pile subassembly, the channel-section steel sets up between anchor clamps and bored concrete pile, set up the gasket between anchor clamps and the channel-section steel.
5. The supporting structure for the sandy gravel geological deep foundation pit under the complex environmental condition as claimed in claim 4, wherein the prestressed anchor cable assembly comprises a steel support and a steel purlin, the steel support is horizontally arranged, one end of the steel support is connected with the outer side of the cast-in-place pile of the supporting pile assembly through the steel purlin, and the other end of the steel support is connected with the outer side of the cast-in-place pile of the supporting pile assembly on the other side of the sandy gravel geological deep foundation pit through the steel purlin.
6. The sandy gravel geological deep foundation pit supporting structure under the complex environmental condition of claim 5, wherein one end of the steel support is connected with the steel purlin through a bolt, and the steel purlin is connected with the outer side of a cast-in-place pile of the support pile assembly through a pre-buried bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122510007.6U CN216428283U (en) | 2021-10-19 | 2021-10-19 | Sand cobble geology deep basal pit supporting construction under complicated environmental condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122510007.6U CN216428283U (en) | 2021-10-19 | 2021-10-19 | Sand cobble geology deep basal pit supporting construction under complicated environmental condition |
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| CN216428283U true CN216428283U (en) | 2022-05-03 |
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|---|---|---|---|
| CN202122510007.6U Active CN216428283U (en) | 2021-10-19 | 2021-10-19 | Sand cobble geology deep basal pit supporting construction under complicated environmental condition |
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| CN (1) | CN216428283U (en) |
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2021
- 2021-10-19 CN CN202122510007.6U patent/CN216428283U/en active Active
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