CN204780943U - H type precast concrete pile and excavation supporting device - Google Patents
H type precast concrete pile and excavation supporting device Download PDFInfo
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- CN204780943U CN204780943U CN201520487208.0U CN201520487208U CN204780943U CN 204780943 U CN204780943 U CN 204780943U CN 201520487208 U CN201520487208 U CN 201520487208U CN 204780943 U CN204780943 U CN 204780943U
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Abstract
The utility model provides a H type precast concrete pile and excavation supporting device, belongs to excavation supporting technical field, including the stake body, and the transversal H type of personally submitting of stake body, the stake body comprises two edges of a wing of symmetry setting and the web that sets up between the both wings reason, be provided with prestressing tendons in the edge of a wing, prestressing tendons moves towards to move towards unanimous with a stake body, and the prestressing tendons periphery is provided with the rectangle edge of a wing stirrup of perpendicular to prestressing tendons trend, and each prestressing tendons is interior along being rectangle array distribution along edge of a wing stirrup, be equipped with the atress reinforcing bar in the web, the prestressing tendons periphery that is in in the web extension line region in the atress reinforcing bar and the edge of a wing is equipped with rectangle web stirrup, the utility model provides a H type prestressed concrete pile is prefabricated component, and construction convenience shortens on -the -spot man -hour greatly, and is higher with cast in situ concrete bored concrete pile looks specific strength is furnished with the prestressing force rod iron in, is difficult to take place the fracture breakoff phenomenon, save more concrete and reinforcing bar under the same bending resistance bearing capacity.
Description
Technical field
The utility model belongs to Base hole supporting technology field, is specifically related to a kind of H type precast concrete pile and the foundation pit support device containing this H type precast concrete pile.
Background technology
In base pit engineering, it is a kind of widely used support pattern that castinplace pile adds water-stop curtain.Current soldier pile generally adopts cast-in-place concrete pile, is to form pile body by concrete perfusion after the boring of scene, and curtain generally adopts three axles stirrings, the construction of churning engineering method, and this support form construction process is as follows:
(1) plant equipment and material enter job site;
(2) smooth location, curtain pile position is located;
(3) three axles are adopted to stir or high-pressure rotary-spray machinery construction biting connecions cement-soil pile;
(4) cast-in-place concrete pile location, stake position is generally positioned at (contiguous foundation ditch side) inside curtain pile;
(5) rig pore-forming or utilize casing pipe hole forming;
(6) clear hole check hole quality;
(7) reinforcing cage is inserted, concrete perfusion;
(8) casing is extracted;
(9) cast-in-place concrete pile pile body is tested.
Generally use although above-mentioned technique is existing, but still there is following problem:
1) cast-in-place concrete pile is generally circular cross-section, need consume more concrete relative to prefabricated pile-type.
2) necessary uninterrupted concrete perfusion in Concrete Grouting Pale process, otherwise have broken pile risk.
3) the in-site pouring concrete work cycle is long, and concrete strength requires higher to the length of time.
4) water-stop curtain needs to take certain space, the more difficult construction when surrounding enviroment complicated condition.
Summary of the invention
The purpose of this utility model is to provide a kind of H type precast concrete pile, provides a kind of foundation pit support device containing this H type precast concrete pile to be another object of the present utility model.
Based on above-mentioned purpose, the utility model takes following technical scheme: a kind of H type precast concrete pile, comprise a body, the cross section of stake body is H type, stake body is made up of symmetrically arranged two edges of a wing and the web be arranged between two edges of a wing, is provided with presstressed reinforcing steel in the described edge of a wing, and presstressed reinforcing steel trend moves towards consistent with stake body, presstressed reinforcing steel periphery be provided with perpendicular to presstressed reinforcing steel trend rectangle edge of a wing stirrup, each presstressed reinforcing steel along in the stirrup of the edge of a wing along rectangular array distribution; Be provided with steel bar stress in described web, in steel bar stress and the edge of a wing, the presstressed reinforcing steel periphery be in web extended line region is provided with rectangle web hooping.
Described presstressed reinforcing steel is prestressed steel bar, and steel bar stress is nonprestressed reinforcement.
A kind of foundation pit support device, comprise foundation ditch and cement earth pile, described cement earth pile is arranged along foundation pit side-wall, and described cement earth pile internal gearing is provided with described H type precast concrete pile.
Described cement earth pile is the stake of long spire priming petock earth.
The outside of described cement earth pile is provided with water-stop curtain wall.
Described water-stop curtain wall is single shaft cement mixing method, multi-shaft cement agitation pile, biting connecions high-pressure rotary jet grouting pile, cement-soil castinplace pile or the stake of TRD engineering method.
Compared with prior art, the beneficial effects of the utility model are:
1, H type prestressed concrete pile of the present utility model is the prefabricated units that centrifugation is produced, and predetermined manufactured operation is simple, flexible, convenient.Compared with existing I shape prestressed concrete pile, under same size condition, H type prestressed concrete pile cross section has larger moment of inertia and resistance moment at Impact direction, its tensile region and pressure zone reinforcing bar and concrete obtain more effective performance, and thus under same volume concrete and reinforcement ratio condition, the stake of H type has larger anti-bending bearing capacity.
2, H type prestressed concrete pile is prefabricated units, constructs easier, and greatly shortens on-the-spot man-hour, without the need to taking out after insertion; Higher with cast-in-situ concrete poured stake phase specific strength, join prestressed steel bar in prefabricated units, in transport, lifting and work progress, cracking destruction phenomenon is less likely to occur; More save material, under identical anti-bending bearing capacity, these prefabricated units more save concrete and reinforcing bar.
3, foundation pit support device of the present utility model, work progress is simple, short construction period, and pile body integrity can be guaranteed, and comparatively conventional borehole castinplace pile saves construction costs.This pile-type is inserted in cement earth pile and is formed compound pile body, both ensure that H type stake stability, turn avoid the impact of common prefabricated pile body static pressure Construction on Environment, in the base pit engineering that water level is higher, this support form and water-stop curtain wall use jointly, can easy construction be reached, safe and reliable, the effect of economical rationality; Concrete amount can be saved compared with water-stop curtain support form with the cast-in-place concrete pile under the same terms.
Accompanying drawing explanation
The structural representation of H type prestressed concrete pile in Fig. 1 embodiment;
The structural representation of foundation pit support device in Fig. 2 embodiment.
Detailed description of the invention
A kind of H type precast concrete pile 1, as shown in Figure 1, comprise a body, the cross section of stake body is H type, and stake body is made up of symmetrically arranged two edges of a wing 101,102 and the web 103 be arranged between two edges of a wing 101,102.
Prestressed steel bar 4 is provided with in the edge of a wing 101,102, prestressed steel bar 4 trend moves towards consistent with stake body, prestressed steel bar 4 periphery is provided with the rectangle edge of a wing stirrup 8 moved towards perpendicular to prestressed steel bar 4, and each prestressed steel bar is interior along rectangular array distribution along rectangle edge of a wing stirrup 8; Be provided with nonprestressed reinforcement 5 in web 103, in nonprestressed reinforcement 5 and the edge of a wing, prestressed steel bar 4 periphery be in web 103 extended line region is provided with rectangle web hooping 6.
H type precast concrete pile 1, its size can be expressed as H × B × d × t.
A kind of foundation pit support device, as shown in Figure 2, comprises foundation ditch 7 and long spire priming petock earth stake 2, and long spire priming petock earth stake 2 is arranged along foundation ditch 7 sidewall, and long spire priming petock earth stake 2 internal gearing is provided with H type precast concrete pile 1 as shown in Figure 1.The outside of long spire priming petock earth stake 2 is provided with water-stop curtain wall 3.Water-stop curtain wall 3 is single shaft cement mixing method, multi-shaft cement agitation pile, biting connecions high-pressure rotary jet grouting pile, cement-soil castinplace pile or the stake of TRD engineering method.
Its construction method comprises the following steps:
(1) construction TRD wall (canal formula cutting cement soil wall) water-stop curtain wall 3;
(2) to construct inside water-stop curtain wall 3 long spire priming petock earth stake 2;
(3) cement earth pile inserts H type precast concrete pile 1 before producing intensity;
(4) after soil cement intensity reaches designing requirement, soldier pile and water-stop curtain are detected.
H type prestressed concrete pile inserts in cement mixing method by the present embodiment, and its work progress is simple, short construction period, and pile body integrity can be guaranteed, and comparatively conventional borehole castinplace pile saves construction costs.
Claims (6)
1. a H type precast concrete pile, comprise a body, the cross section of stake body is H type, stake body is made up of symmetrically arranged two edges of a wing and the web be arranged between two edges of a wing, it is characterized in that, be provided with presstressed reinforcing steel in the described edge of a wing, presstressed reinforcing steel trend moves towards consistent with stake body, presstressed reinforcing steel periphery be provided with perpendicular to presstressed reinforcing steel trend rectangle edge of a wing stirrup, each presstressed reinforcing steel along in the stirrup of the edge of a wing along rectangular array distribution; Be provided with steel bar stress in described web, in steel bar stress and the edge of a wing, the presstressed reinforcing steel periphery be in web extended line region is provided with rectangle web hooping.
2. H type precast concrete pile as claimed in claim 1, it is characterized in that, described presstressed reinforcing steel is prestressed steel bar, and steel bar stress is nonprestressed reinforcement.
3. a foundation pit support device, comprises foundation ditch and cement earth pile, it is characterized in that, described cement earth pile is arranged along foundation pit side-wall, and described cement earth pile internal gearing is provided with the H type precast concrete pile described in claim 1 or 2.
4. foundation pit support device as claimed in claim 3, it is characterized in that, described cement earth pile is the stake of long spire priming petock earth.
5. foundation pit support device as claimed in claim 4, it is characterized in that, the outside of described cement earth pile is provided with water-stop curtain wall.
6. foundation pit support device as claimed in claim 5, it is characterized in that, described water-stop curtain wall is single shaft cement mixing method, multi-shaft cement agitation pile, biting connecions high-pressure rotary jet grouting pile, cement-soil castinplace pile or the stake of TRD engineering method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520487208.0U CN204780943U (en) | 2015-07-08 | 2015-07-08 | H type precast concrete pile and excavation supporting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520487208.0U CN204780943U (en) | 2015-07-08 | 2015-07-08 | H type precast concrete pile and excavation supporting device |
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| Publication Number | Publication Date |
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| CN204780943U true CN204780943U (en) | 2015-11-18 |
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| CN201520487208.0U Active CN204780943U (en) | 2015-07-08 | 2015-07-08 | H type precast concrete pile and excavation supporting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107034894A (en) * | 2017-03-21 | 2017-08-11 | 杭州钜力锚杆科技有限公司 | Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method |
| CN109715888A (en) * | 2016-10-27 | 2019-05-03 | 李承远 | Precast reinforced concrete pile and the earth-retaining wall construction method for utilizing it |
-
2015
- 2015-07-08 CN CN201520487208.0U patent/CN204780943U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109715888A (en) * | 2016-10-27 | 2019-05-03 | 李承远 | Precast reinforced concrete pile and the earth-retaining wall construction method for utilizing it |
| CN109715888B (en) * | 2016-10-27 | 2021-04-09 | 李承远 | Prefabricated reinforced concrete pile and retaining wall construction method using same |
| CN107034894A (en) * | 2017-03-21 | 2017-08-11 | 杭州钜力锚杆科技有限公司 | Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method |
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