CN211898427U - Vertical excavation supporting system based on miniature steel pipe piles for red clay foundation pit - Google Patents
Vertical excavation supporting system based on miniature steel pipe piles for red clay foundation pit Download PDFInfo
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- CN211898427U CN211898427U CN202020189241.6U CN202020189241U CN211898427U CN 211898427 U CN211898427 U CN 211898427U CN 202020189241 U CN202020189241 U CN 202020189241U CN 211898427 U CN211898427 U CN 211898427U
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Abstract
The utility model discloses a vertical excavation supporting system for red clay foundation pit based on miniature steel pipe pile, including along the vertical downward a plurality of miniature steel pipes that insert the bottom of foundation pit wall, the both sides in miniature steel pipe distribution region are equipped with 1 stand that sets up with the same mode of miniature steel pipe respectively, miniature steel pipe is connected through pile crown roof beam with the top of stand, fixedly connected with prestressed anchorage cable on the stand, prestressed anchorage cable stretches into the basement rock in the foundation pit wall; concrete panels are arranged between the micro steel pipes and the stand columns and between the micro steel pipes and the micro steel pipes. The utility model discloses both possible foundation ditch side slope safety and stability can reach the characteristics of practicing thrift the cost again.
Description
Technical Field
The utility model relates to a excavation supporting system, especially a perpendicular excavation supporting system that is used for red clay foundation ditch based on miniature steel-pipe pile.
Background
At present, various supporting schemes related to foundation pit supporting are available, such as a slope ratio method, an anti-slide pile, a system anchor rod (anchor cable), a net hanging spray anchor and the like. The slope rate method is characterized in that a foundation pit side slope is subjected to slope excavation according to a certain design slope ratio, and the side slope after the slope excavation is in a stable state and meets the requirements of relevant specifications; the whole length of the anti-slide pile is an upright pile, which extends into a certain depth below the sliding surface of a landslide body to support and block the residual gliding force or active soil pressure of the landslide body, so that the anti-slide pile plays a role in stabilizing the side slope, is suitable for the side slope of a shallow layer or a medium-thick layer, and is one of the most effective and most widely applied side slope treatment measures at present; the anchor rod (anchor cable) of the system is characterized in that the anchor rod (anchor cable) with a certain length is driven into a rock-soil layer, mortar is poured, the anchor rod (anchor cable) and surrounding rock-soil bodies are fixed together, and the anchor rod (anchor cable) is stressed in a coordinated manner to resist external force and play a role in reinforcing the side slope of the foundation pit; the net hanging spray anchor is mainly used for totally closing the foundation pit side slope when the foundation pit side slope is greatly influenced by rainwater and is in a stable state, blocking hydraulic connection with the outside, enabling the foundation pit side slope to be in a 'dry' state for a long time, and keeping the physical and mechanical properties of the foundation pit side slope rock-soil body at a high level so as to ensure the safety and stability of the foundation pit side slope. In practical production practice, the selection of the foundation pit support is often a combination of the support schemes, such as anti-slide piles, anchor cables, slope releasing, net hanging, shotcrete and the like, and the stability of the foundation pit slope is often difficult to guarantee by a single support mode, especially for the soil foundation pit slope.
In production practice, slope placing treatment is not allowed for some foundation pit slopes, the foundation pit slopes are deep in soil quality, soil bodies are red clay with particularity, and the foundation pit slopes are special compared with common foundation pit slopes and need to be considered specially. Based on the consideration of safety and stability of the foundation pit side slope, strong support measures need to be taken, such as the mentioned 'anti-slide pile + anchor cable' strong support measures; based on the economic and economic considerations, the obvious 'slide-resistant pile and anchor rope' strong support measures are higher in cost and uneconomical. The safety and stability are achieved, economic and saving are considered, and the contradiction and the high unification are achieved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a perpendicular excavation supporting system for red clay foundation ditch based on miniature steel-pipe pile. The utility model discloses both possible foundation ditch side slope safety and stability can reach the characteristics of practicing thrift the cost again.
The technical scheme of the utility model: a vertical excavation supporting system for a red clay foundation pit based on miniature steel pipe piles comprises a plurality of miniature steel pipes vertically inserted downwards into the bottom of the foundation pit along the wall of the foundation pit, wherein two sides of a distribution area of the miniature steel pipes are respectively provided with 1 upright post arranged in the same way as the miniature steel pipes, the miniature steel pipes are connected with the top ends of the upright posts through pile top crown beams, the upright posts are fixedly connected with prestressed anchor cables, and the prestressed anchor cables extend into bedrock in the wall of the foundation pit; concrete panels are arranged between the micro steel pipes and the stand columns and between the micro steel pipes and the micro steel pipes.
According to the vertical excavation supporting system based on the miniature steel pipe pile for the red clay foundation pit, the diameter of the miniature steel pipe is 165-170mm, and the wall thickness is 6-10 mm.
According to the vertical excavation supporting system based on the miniature steel pipe piles for the red clay foundation pit, the distance between every two adjacent miniature steel pipes is 40-50cm, and the miniature steel pipes are inserted into bedrock at the bottom of the foundation pit by 2.5-3.5 m.
The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile is characterized in that 1: 1, cement mortar, and the pouring pressure is 0.3 MPa.
According to the vertical excavation supporting system based on the miniature steel pipe pile for the red clay foundation pit, the pile top crown beam is a reinforced concrete beam, the concrete strength is C25, the section size is 100mm x 60mm, and the middle of the pile top crown beam is provided with 12 phi 16 longitudinal bars and phi 12@20cm stirrups.
According to the vertical excavation supporting system based on the miniature steel pipe pile for the red clay foundation pit, the prestressed anchor cable extends into the bedrock 7-9m in the foundation pit wall.
The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile is characterized in that the concrete panel is a net-hanging concrete-spraying panel.
In the vertical excavation supporting system based on the miniature steel pipe pile for the red clay foundation pit, the concrete strength of the net-hanging concrete-spraying panel is C20, and the thickness is 90-110 mm; the reinforcing mesh with the diameter of 8@20 x 20cm is hung in the middle, and the transverse and longitudinal reinforcing ribs and the sash beam reinforcing ribs with the diameter of 2 phi 16@50cm are arranged outside.
The beneficial effects of the utility model
The utility model provides a vertical excavation supporting system based on miniature steel-pipe pile for red clay foundation pit, the supporting system is a comprehensive supporting structure of miniature steel-pipe pile + crown beam + hanging net concrete-spraying panel + upright post + prestressed anchor cable sash, the miniature steel-pipe pile is tightly attached to the foundation pit side slope wall, the pile top is provided with the crown beam, the miniature steel-pipe pile is linked, and the supporting system is cooperated with the stress; the outer side of the miniature steel pipe pile is provided with a stand column, a prestressed anchor cable anchor head is arranged on the outer side of the stand column, a prestressed anchor cable goes deep into the complete bedrock, the steel pipe pile, the stand column and the foundation pit slope rock-soil body are fixed by adopting a prestressed anchor cable lattice, and the whole foundation pit slope is reinforced by the miniature steel pipe pile, the stand column and the prestressed anchor cable to form a stress system; the concrete panel is sprayed to the hanging net between steel-pipe pile and the steel-pipe pile, and horizontal and vertical strengthening rib and sash roof beam steel bar connection to improve sash and panel atress effect's wholeness.
Through the comprehensive supporting structure of 'micro steel pipe pile + crown beam + net-hanging concrete-spraying panel + upright post + prestressed anchor cable sash', slope-releasing treatment is not allowed, the foundation pit slope is deep in soil quality, and the soil body is reinforced for the special red clay foundation pit slope, so that the purposes of safety, stability, economy and reasonability are achieved. Just the utility model relates to a perpendicular excavation supporting system is convenient for produce and be under construction for red clay foundation ditch based on miniature steel-pipe pile, but the wide application is in the engineering.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a right side view of fig. 1.
Description of reference numerals: 1-foundation pit wall, 2-foundation pit, 3-micro steel pipe, 4-upright post, 5-pile top crown beam, 6-prestressed anchor cable and 7-concrete panel.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended as a limitation of the present invention.
Embodiments of the utility model
A vertical excavation supporting system based on miniature steel pipe piles for a red clay foundation pit is shown in an attached figure 1-2 and comprises a plurality of miniature steel pipes 3 vertically inserted into the bottom of the foundation pit 2 downwards along a foundation pit wall 1, two sides of a distribution area of the miniature steel pipes 3 are respectively provided with 1 upright post 4 arranged in the same way as the miniature steel pipes 3, the miniature steel pipes 3 are connected with the top ends of the upright posts 4 through pile top crown beams 5, the upright posts 4 are fixedly connected with prestressed anchor cables 6, and the prestressed anchor cables 6 extend into a foundation rock in the foundation pit wall 1; concrete panels 7 are arranged between the micro steel pipes 3 and the upright posts 4 and between the micro steel pipes 3 and the micro steel pipes 3.
During construction, the micro steel pipe 3 is driven into the bedrock at the bottom of the foundation pit 2 along the foundation pit wall 1, the upright post 4 is driven into the outer side of the micro steel pipe 3 in the same manner, the anchor head of the prestressed anchor cable 6 is arranged on the outer side of the upright post 4, the prestressed anchor cable 6 is driven into the bedrock of the foundation pit wall 1, meanwhile, the pile top crown beam 5 is constructed at the tops of the upright post 4 and the micro steel pipe 3, and finally, the concrete panel 7 is poured.
Preferably, the diameter of the micro-steel tube 3 is 165-170mm, and the wall thickness is 6-10mm, and the diameter is 168mm and the wall thickness is 8mm in practical use.
Preferably, the distance between the adjacent micro steel pipes 3 is 40-50cm, the micro steel pipes are inserted into the bedrock at the bottom of the foundation pit 2 by 2.5-3.5m, and during actual construction, the distance is 45cm and the insertion depth is 3 m.
Preferably, the micro steel pipe 3 is internally poured with a mixture of 1: 1, cement mortar, and the pouring pressure is 0.3 MPa.
Preferably, the pile top crown beam 5 is a reinforced concrete beam, the concrete strength is C25, the section size is 100mm x 60mm, and a 12 phi 16 longitudinal bar and a phi 12@20cm stirrup are arranged in the middle.
Preferably, the prestressed anchor cable 6 extends into the bedrock 7-9m in the foundation pit wall 1, and is actually driven to a depth of 8 m.
Preferably, the concrete panel 7 is a net-blown concrete panel.
Preferably, the concrete strength of the net-hung concrete spraying panel is C20, and the thickness of the net-hung concrete spraying panel is 90-110mm (100 mm during actual construction); the reinforcing mesh with the diameter of 8@20 x 20cm is hung in the middle, and the transverse and longitudinal reinforcing ribs and the sash beam reinforcing ribs with the diameter of 2 phi 16@50cm are arranged outside.
The above, only do the utility model discloses create the embodiment of preferred, nevertheless the utility model discloses the protection scope of creation is not limited to this, and any technical personnel who is familiar with this technical field are in the utility model discloses create the technical scope of disclosure, according to the utility model discloses technical scheme and the utility model design that creates of the utility model are equivalent replacement or change, all should be covered within the protection scope of creation of the utility model.
Claims (8)
1. The utility model provides a perpendicular excavation supporting system for red clay foundation ditch is based on miniature steel-pipe pile which characterized in that: the foundation pit structure comprises a plurality of miniature steel pipes (3) vertically inserted into the bottom of a foundation pit (2) downwards along a foundation pit wall (1), wherein two sides of the distribution area of the miniature steel pipes (3) are respectively provided with 1 upright post (4) arranged in the same way as the miniature steel pipes (3), the miniature steel pipes (3) are connected with the top ends of the upright posts (4) through pile top crown beams (5), the upright posts (4) are fixedly connected with prestressed anchor cables (6), and the prestressed anchor cables (6) extend into bedrock in the foundation pit wall (1); concrete panels (7) are arranged between the micro steel pipes (3) and the upright posts (4) and between the micro steel pipes (3) and the micro steel pipes (3).
2. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 1, characterized in that: the diameter of the micro steel pipe (3) is 165-170mm, and the wall thickness is 6-10 mm.
3. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 1, characterized in that: the distance between every two adjacent micro steel pipes (3) is 40-50cm, and the micro steel pipes are inserted into bedrock at the bottom of the foundation pit (2) by 2.5-3.5 m.
4. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 1, characterized in that: the miniature steel pipe (3) is internally filled with 1: 1, cement mortar, and the pouring pressure is 0.3 MPa.
5. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 1, characterized in that: the pile top crown beam (5) is a reinforced concrete beam, the concrete strength is C25, the section size is 100mm x 60mm, and a 12 phi 16 longitudinal bar and a phi 12@20cm stirrup are arranged in the middle.
6. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 1, characterized in that: the prestressed anchor cable (6) extends into the bedrock 7-9m in the foundation pit wall (1).
7. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 1, characterized in that: the concrete panel (7) is a net-hanging concrete-spraying panel.
8. The vertical excavation supporting system for the red clay foundation pit based on the miniature steel pipe pile as claimed in claim 7, characterized in that: the concrete strength of the net-hanging spray concrete panel is C20, and the thickness is 90-110 mm; the reinforcing mesh with the diameter of 8@20 x 20cm is hung in the middle, and the transverse and longitudinal reinforcing ribs and the sash beam reinforcing ribs with the diameter of 2 phi 16@50cm are arranged outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020189241.6U CN211898427U (en) | 2020-02-20 | 2020-02-20 | Vertical excavation supporting system based on miniature steel pipe piles for red clay foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020189241.6U CN211898427U (en) | 2020-02-20 | 2020-02-20 | Vertical excavation supporting system based on miniature steel pipe piles for red clay foundation pit |
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| Publication Number | Publication Date |
|---|---|
| CN211898427U true CN211898427U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020189241.6U Active CN211898427U (en) | 2020-02-20 | 2020-02-20 | Vertical excavation supporting system based on miniature steel pipe piles for red clay foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211898427U (en) |
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2020
- 2020-02-20 CN CN202020189241.6U patent/CN211898427U/en active Active
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