CN201347559Y - Supporting structure of suspending pile for foundation pit - Google Patents
Supporting structure of suspending pile for foundation pit Download PDFInfo
- Publication number
- CN201347559Y CN201347559Y CNU2009200497818U CN200920049781U CN201347559Y CN 201347559 Y CN201347559 Y CN 201347559Y CN U2009200497818 U CNU2009200497818 U CN U2009200497818U CN 200920049781 U CN200920049781 U CN 200920049781U CN 201347559 Y CN201347559 Y CN 201347559Y
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- Prior art keywords
- pin
- stake
- hanging
- pile
- suspending
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Abstract
The utility model discloses a supporting structure of a suspending pile for a foundation pit, and adopts a manual hole digging suspending pile. A prestressed anchor cable for locking feet is additionally arranged at the bottom of the suspending pile. In the situation of greater excavating depth of the foundation pit, the utility model adopts the manual hole dipping suspending pile and the prestressed anchor cable as a supporting structure, and reinforces the feet locking to the bottom of the hole dipping suspending pile, thereby effectively preventing the foundation pit from slipping integrally.
Description
Technical field
The utility model relates to building operations geotechnical engineering technical field, relates in particular to a kind of deep big foundation pit and adopts manually digging hole to hang the support system of pin stake.
Background technology
In building operations was built, for making full use of the underground space, the excavation of foundation ditch was more and more darker, increasing now.The commonly used support system traditional for deep big foundation pit mainly contains: side direction retaining soil body system (as castinplace pile, preformed pile and diaphragm wall) and horizontal support system (as drawing anchor, steel to support and the concrete support).
Along with the continuous increase of the excavation of foundation pit degree of depth, the difficulty of foundation ditch displacement control is also increasing, especially surpasses (the maximum cutting depth of the hand excavated pile of Department of Construction of Guangdong Province's regulation is 25 meters) under the situation about stipulating in cutting depth.When stake bed rock when the angle of inclination is big in the hole, foundation ditch is also bigger along the risk of hanging pin stake bottom generation integral slipping.When having more weak intercalated layer, bigger sudden change all can take place in space enclosing structure or land movement basically near weak intercalated layer.Therefore and the basement rock buried depth is more shallow, and the rock blasting amount is bigger, and is bigger to the influence of foundation ditch safety, and explosion is also increasing to the influence of foundation ditch displacement when excavating at the bottom of the stake.
In addition, how effectively reducing cost, the accelerating construction progress of foundation pit supporting system on the basis of safe and applicable, also is still to need at present the problem that solves.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of pin pile foundation of hanging that can prevent effectively that under the bigger situation of the excavation of foundation pit degree of depth foundation ditch integral slipping from taking place to cheat the support system structure.
The purpose of this utility model is achieved by the following technical programs:
A kind of pin pile foundation hole support system structure of hanging that the utility model provides adopts manually digging hole to hang the pin stake, and the described stake end of hanging the pin stake is equipped with prestressing force lock pin anchor cable.Under the bigger situation of the excavation of foundation pit degree of depth, for preventing the generation of foundation ditch integral slipping, the utility model adopts manually digging hole to hang pin stake+prestress anchorage cable as supporting and protection structure, borehole is hung the stake end of pin stake and locks the pin consolidation process.The stake end of hanging the pin stake described in the utility model, also can further be provided with the steel concrete baffle plate.The thickness of the described steel concrete baffle plate of annotating at the stake bottom pour mold can be 40cm.
In addition, for reducing the influence that rock blasting is produced foundation ditch safety, foundation ditch periphery described in the utility model is provided with shockproof ditch, and its width can be 1 meter.
The utility model is particularly useful for the bigger situation of the excavation of foundation pit degree of depth, and hanging the stake of pin stake long as manually digging hole is 19～25 meters, when hanging the pin height and being 8.88～2.88 meters.
The present invention has following beneficial effect:
(1) under the bigger situation of the excavation of foundation pit degree of depth, by to locking the pin consolidation process at the bottom of the stake, shockproof ditch is set, thereby effectively prevented the generation of foundation ditch integral slipping.
(2) because rock stratum, supporting pile body bottom face is higher, and below supporting and protection structure all constructed at the bottom of the foundation ditch, the soldier pile construction depth was above 25 meters.Calculate by analysis, this stake needn't be dug under the foundation depth and (promptly may not be dug very longly), has just saved material from pile body itself, thereby has correspondingly saved cost and duration.
Description of drawings
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail:
Fig. 1 hangs pin stake schematic diagram among the utility model embodiment;
Fig. 2 is a foundation ditch generalized section among this utility model embodiment.
Among the figure: manually digging hole hangs pin stake 1, anchor cable 2, gentle breeze rock stratum 3, lock pin anchor cable 4
The specific embodiment
Illustrated in figures 1 and 2 is embodiment of the present utility model, and the projected depth of foundation ditch is 29.50 meters, and the actual grade of construction mainly is 27.88 meters, 33 meters of partial-depths.Adopt manually digging hole to hang pin stake 1, stake is long 19～25 meters, hangs 8.88 meters to 2.88 meters of pin height.As shown in Figure 1, foundation ditch top is by the supporting acting in conjunction of anchor cable 2 prestressing force and stake; As shown in Figure 2, the foot of soldier pile utilizes the self-stability of gentle breeze rock stratum 3, and active earth pressure is very little, and the inclination situation of analytical calculation stake bed rock aspect adopts prestressing force lock pin anchor cable, can solve the stressed and problem on deformation of hanging pin stake supporting and protection structure.
If footing does not obtain effective build-in, the difficulty of foundation ditch displacement control will increase, and the control of anchor cable being gone into the rock degree of depth and stretching force will be strict more.Stake bed rock angle of inclination in the hole is bigger, and to produce the risk of integral slipping bigger along hanging pin stake bottom for foundation ditch.And scar tilts seriously, weak intercalated layer is more, especially, all finds the weak intercalated layer of some inclination angles greater than 30 degree at the stake end in foundation ditch the south and west.Foundation ditch monitoring report shows that bigger sudden change substantially all takes place for space enclosing structure or land movement near this weak intercalated layer.
Therefore, for preventing the generation of foundation ditch integral slipping, as shown in Figure 1, carried out lock pin consolidation process at the bottom of the bigger hole digging pile stake of stake bed rock face tilt angle, annotated the thick steel concrete baffle plate of about 40cm and add the rock of lock pin anchor cable 4 (or shearing resistance anchor poles) with the locking footing at the stake bottom pour mold to finding.
In addition, the basement rock buried depth is more shallow in the place, and the rock blasting amount is bigger, and is bigger to the influence of foundation ditch safety.Find when excavating at the bottom of the stake that explosion is increasing to the influence of foundation ditch displacement, space enclosing structure is provided with 1 meter wide of a row's shockproof ditch along with the velocity of displacement that carries out of explosion strengthens for this reason along the foundation ditch periphery.The influence that has effectively reduced after the explosion foundation ditch is finished in this shockproof ditch construction, has reduced gathering way of foundation ditch displacement.
After three months that whole foundation pit construction is finished, the maximum displacement of all monitoring points of foundation ditch all is no more than 40mm, and displacement only is equivalent to 1/700 of foundation depth, and foundation ditch displacement control is quite successful.
Claims (6)
1, a kind of pin pile foundation hole support system structure of hanging adopts manually digging hole to hang the pin stake, it is characterized in that: the described stake end of hanging pin stake (1), be equipped with prestressing force lock pin anchor cable (4).
2, the pin pile foundation hole support system structure of hanging according to claim 1, it is characterized in that: the described stake end of hanging pin stake (1), be provided with the steel concrete baffle plate.
3, the pin pile foundation hole support system structure of hanging according to claim 2, it is characterized in that: the thickness of described steel concrete baffle plate is 40cm.
4, according to claim 1 or the 2 or 3 described pin pile foundation hole support system structures of hanging, it is characterized in that: described foundation ditch periphery is provided with shockproof ditch.
5, the pin pile foundation hole support system structure of hanging according to claim 1 is characterized in that: described stake of hanging the pin stake is long to be 19～25 meters, and hanging the pin height is 8.88～2.88 meters.、
6, the pin pile foundation hole support system structure of hanging according to claim 4, it is characterized in that: the width of described shockproof ditch is 1 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200497818U CN201347559Y (en) | 2009-01-08 | 2009-01-08 | Supporting structure of suspending pile for foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200497818U CN201347559Y (en) | 2009-01-08 | 2009-01-08 | Supporting structure of suspending pile for foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201347559Y true CN201347559Y (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200497818U Expired - Lifetime CN201347559Y (en) | 2009-01-08 | 2009-01-08 | Supporting structure of suspending pile for foundation pit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201347559Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330436A (en) * | 2011-07-05 | 2012-01-25 | 中冶天工上海十三冶建设有限公司 | Composite retaining structure and composite retaining method for half geotechnical layer ultradeep round spiral flow tank |
| CN107012874A (en) * | 2017-05-07 | 2017-08-04 | 中铁十八局集团有限公司 | A kind of upper-soft lower-hard ground subway station building enclosure |
| CN108661056A (en) * | 2018-05-22 | 2018-10-16 | 中铁六局集团有限公司工程设计院 | A kind of peg board combined retaining structure and construction technology up and down |
| CN113653068A (en) * | 2021-09-08 | 2021-11-16 | 中建八局第二建设有限公司 | Construction method of deep foundation pit support based on upper soft and lower hard rock stratum |
| CN114032932A (en) * | 2021-12-15 | 2022-02-11 | 中煤科工重庆设计研究院(集团)有限公司 | Construction method of mixed retaining structure |
-
2009
- 2009-01-08 CN CNU2009200497818U patent/CN201347559Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330436A (en) * | 2011-07-05 | 2012-01-25 | 中冶天工上海十三冶建设有限公司 | Composite retaining structure and composite retaining method for half geotechnical layer ultradeep round spiral flow tank |
| CN102330436B (en) * | 2011-07-05 | 2014-06-04 | 中冶天工上海十三冶建设有限公司 | Composite retaining structure and composite retaining method for half geotechnical layer ultradeep round spiral flow tank |
| CN107012874A (en) * | 2017-05-07 | 2017-08-04 | 中铁十八局集团有限公司 | A kind of upper-soft lower-hard ground subway station building enclosure |
| CN108661056A (en) * | 2018-05-22 | 2018-10-16 | 中铁六局集团有限公司工程设计院 | A kind of peg board combined retaining structure and construction technology up and down |
| CN108661056B (en) * | 2018-05-22 | 2020-05-22 | 中铁六局集团有限公司工程设计院 | Pile plate up-and-down combined supporting structure and construction process |
| CN113653068A (en) * | 2021-09-08 | 2021-11-16 | 中建八局第二建设有限公司 | Construction method of deep foundation pit support based on upper soft and lower hard rock stratum |
| CN114032932A (en) * | 2021-12-15 | 2022-02-11 | 中煤科工重庆设计研究院(集团)有限公司 | Construction method of mixed retaining structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091118 |
|
| CX01 | Expiry of patent term |