CN107503356A - One kind is applied to control foundation pit supporting construction forming method in soft soil horizon - Google Patents
One kind is applied to control foundation pit supporting construction forming method in soft soil horizon Download PDFInfo
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- CN107503356A CN107503356A CN201710710238.7A CN201710710238A CN107503356A CN 107503356 A CN107503356 A CN 107503356A CN 201710710238 A CN201710710238 A CN 201710710238A CN 107503356 A CN107503356 A CN 107503356A
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- supporting construction
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- deep mixing
- stake
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- 238000010276 construction Methods 0.000 title claims abstract description 103
- 239000002689 soil Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009412 basement excavation Methods 0.000 claims abstract description 10
- 230000010412 perfusion Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004927 clay Substances 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000209202 Bromus secalinus Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to applied to controlling foundation pit supporting construction forming method in soft soil horizon, field of engineering technology under possession.Tri-axes deep mixing stake, the outer tri-axes deep mixing stake in hole, the vertical supporting construction of foundation ditch in present invention hole.Smooth location first, construction is mutually parallel and hole at regular intervals in tri-axes deep mixing stake and cheat outer tri-axes deep mixing stake.After the intensity of two row's tri-axes deep mixing stakes reaches to a certain degree, then the vertical supporting construction of construction foundation pit among two row's tri-axes deep mixing stakes.Then, after the vertical supporting construction of foundation ditch reaches design strength, along on the inside of the vertical supporting construction of foundation ditch, it then follows the principle excavation pit of " layering, be segmented, be symmetrical, balanced, in good time ", and Guan Liang, waist rail and branch anchor structure are constructed one by one, complete the excavation of foundation ditch.The present invention can not only ensure its Forming Quality in support construction, and play restriction effect to the crowded or undergauge that extends out of chutable concrete, effectively control the fullness coefficient of supporting construction, guarantee is provided for the construction quality of supporting construction.
Description
Technical field
It is applied to control foundation pit supporting construction forming method in soft soil horizon the present invention relates to one kind, belongs to underground engineering skill
Art field.
Background technology
When city carries out foundation pit construction at present, often the construction work such as supporting, diaphram wall inner support is supportted using pile-anchor retaining, stake
Skill is simple, is applicable the supporting construction that depth is extensive, maintenance effects are good.But in soft soil horizon, as muck soil, cumulosol,
Above-mentioned supporting construction is performed in the soil layers such as loose flour sand, silt, compressibility is high, big, full water of void ratio etc. because figure layer has
Feature, fullness coefficient is higher in support pile work progress, and pore-forming quality is difficult to ensure that barrier；And such regional underground water
It is abundant, need to strengthen in terms of the water proof antiseepage of foundation ditch, therefore, it is necessary to design a kind of pattern foundation pit supporting structure knot suitable for soft soil horizon
Structure forming method.
The content of the invention
The technical problem to be solved in the present invention is：The present invention proposes one kind and is applied to control pattern foundation pit supporting structure in soft soil horizon
Structure forming method, it can ensure the Forming Quality of vertical supporting construction well, control fullness coefficient, and saving is constructed into
This, and can plays a part of water-stop curtain.
The technical scheme is that：One kind is applied to control foundation pit supporting construction forming method, the side in soft soil horizon
Method comprises the following steps that：
A, smooth location first, prepared for construction tri-axes deep mixing stake；
B, carry out having the construction of the outer tri-axes deep mixing stake 2 of tri-axes deep mixing stake 1 and hole in the hole of spacing；
C, after cheating the outer tri-axes deep mixing stake 2 of interior tri-axes deep mixing stake 1 and hole and reaching intensity requirement, among two row's tri-axes deep mixing stakes
The vertical supporting construction 3 of construction foundation pit；
D, after the vertical supporting construction 3 of foundation ditch reaches design strength, along the vertical inner side of supporting construction 3 of foundation ditch, it then follows " layering, divide
Section, it is symmetrical, balanced, in good time " principle excavation pit；
E, when being excavated to below the designed elevation of Guan Liang 4 50cm, Guan Liang 4 of constructing and first row branch anchor structure 6；
F, when being excavated to below the designed elevation of second row branch anchor structure 6 50cm, construct waist rail 5 and second row branch anchor structure 6；
G, construct successively each row's branch anchor structure 6, until being excavated to hole bottom designed elevation, complete the construction of whole supporting construction.
On the basis of above-mentioned technical proposal, the present invention also does described further below.
In the step B, in hole tri-axes deep mixing stake 1 be located at the inner side of the vertical supporting construction of foundation ditch 3, stake footpath 650mm ~
Between 850mm, to ensure that the purpose of water proof antiseepage is unlikely to waste again, lap width 150 ~ 250mm of every width is vertical with foundation ditch
100 ~ 200mm of lap width of supporting construction 3, length supporting construction 3 long 1m more vertical than foundation ditch are used to ensure the vertical supporting of foundation ditch
The quality of structure 3.
In the step B, cheat outer tri-axes deep mixing stake 2 and be located on the outside of the vertical supporting construction 3 of foundation ditch, stake footpath 650mm ~
Between 850mm, to ensure that the purpose of water proof antiseepage is unlikely to waste again, lap width 250 ~ 350mm of every width is vertical with foundation ditch
100 ~ 200mm of lap width of supporting construction 3, length supporting construction 3 long 1m more vertical than foundation ditch are used to ensure the vertical supporting of foundation ditch
The quality of structure 3.
In the step C, intensity requirement therein is that the outer tri-axes deep mixing stake 2 of tri-axes deep mixing stake 1 and hole reaches energy in finger pit
Unlikely when the vertical pore-forming of supporting construction 3 of guarantee foundation ditch or grooving to cave in, it is outer that and can limits its chutable concrete extruding in perfusion
Intensity when expansion or undergauge.
In the step C, the vertical supporting construction 3 of foundation ditch is diaphram wall, rotary digging drilling hole bored concrete pile or long auger
The support piles such as bored concrete pile, its wall thickness, stake footpath or length are according to the requirement of foundation depth, geological conditions and foundation ditch surrounding enviroment condition
It is determined that.
In described step E, F, G, branch anchor structure 6 is anchor cable, anchor pole, soil nailing, inner support diversified forms, is set by pattern foundation pit supporting structure
Meter personnel select according to the concrete condition of foundation ditch.
The beneficial effects of the invention are as follows：The present invention is provided with hole in the vertical supporting construction both sides of foundation ditch, hole is outer two group three
Axle stirs stake deeply, not only can be in the vertical supporting construction pore-forming of construction foundation pit（Groove）When play a part of retaining wall, can also irrigate
During foundation ditch vertical structure, iris action is played, prevents that chutable concrete from spreading or undergauge into the soil body, makes supporting construction
Quality be protected.Further, since soft soil horizon location underground water is relatively abundanter, two rows stir stake also deeply in hole, outside hole
Water-stop curtain can be played a part of；
The effectively fullness coefficient of control supporting construction, guarantee is provided for the construction quality of supporting construction.It can be widely applied to pine
Soft Soil Layer is enriched in the pattern foundation pit supporting structure in area.
Brief description of the drawings
Tri-axes deep mixing pile driving construction completes plan inside and outside hole in Fig. 1 present invention；
Tri-axes deep mixing pile driving construction completes profile inside and outside hole in Fig. 2 present invention；
Support construction completes profile in Fig. 3 present invention；
Fig. 4 present invention is applied to vertical support construction during pile-anchor retaining and completes profile；
Fig. 5 present invention is applied to vertical support construction during ground-connecting-wall inner support supporting and completes profile；
Fig. 6 present invention is applied to vertical support construction during pile-anchor retaining and completes plan；
Fig. 7 present invention is applied to vertical support construction during ground-connecting-wall inner support supporting and completes plan.
Each label in Fig. 1-7：Tri-axes deep mixing stake in 1- holes；2- cheats outer tri-axes deep mixing stake；The vertical supporting construction of 3- foundation ditches；4-
Guan Liang；5- waist rails；6- branch anchor structures.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the invention will be further described.
Embodiment 1：As shown in figs. 1-7, it is a kind of to be applied to control foundation pit supporting construction forming method in soft soil horizon, it is described
Method comprises the following steps that：
A, smooth location first, prepared for construction tri-axes deep mixing stake；
B, carry out having the construction of the outer tri-axes deep mixing stake 2 of tri-axes deep mixing stake 1 and hole in the hole of spacing；
C, after cheating the outer tri-axes deep mixing stake 2 of interior tri-axes deep mixing stake 1 and hole and reaching intensity requirement, among two row's tri-axes deep mixing stakes
The vertical supporting construction 3 of construction foundation pit；
D, after the vertical supporting construction 3 of foundation ditch reaches design strength, along the vertical inner side of supporting construction 3 of foundation ditch, it then follows " layering, divide
Section, it is symmetrical, balanced, in good time " principle excavation pit；
E, when being excavated to below the designed elevation of Guan Liang 4 50cm, Guan Liang 4 of constructing and first row branch anchor structure 6；
F, when being excavated to below the designed elevation of second row branch anchor structure 6 50cm, construct waist rail 5 and second row branch anchor structure 6；
G, construct successively each row's branch anchor structure 6, until being excavated to hole bottom designed elevation, complete the construction of whole supporting construction.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, in the step C, intensity requirement therein is the outer tri-axes deep mixing of tri-axes deep mixing stake 1 and hole in finger pit
Stake 2 reaches unlikely when can guarantee that the vertical pore-forming of supporting construction 3 of foundation ditch or grooving and caved in, and and can limits its fluidised form coagulation in perfusion
Soil extruding extends out or intensity during undergauge.
Further, in the step C, the vertical supporting construction 3 of foundation ditch is diaphram wall, rotary digging drilling hole bored concrete pile or length
Auger boring pouring pile, its wall thickness, stake footpath or length are according to the requirement of foundation depth, geological conditions and foundation ditch surrounding enviroment condition
It is determined that.
Further, in described step E, F, G, branch anchor structure 6 is anchor cable, anchor pole, soil nailing, inner support diversified forms, by
Foundation Pit Support Design personnel select according to the concrete condition of foundation ditch.
Embodiment 2：As shown in Fig. 1-4 and Fig. 6, piled anchor is used in cumulosol, silt and silty clay alternating layers stratum
When structure does foundation pit supporting system, excavation of foundation pit depth 8m.Support pile uses stake footpath as 800mm, and long 18m long auger fills
Note stake.The outer tri-axes deep mixing stake of tri-axes deep mixing stake and hole uses stake footpath as 650mm in hole, long 19m tri-axes deep mixing stake.Three in hole
The lap of splice that axle stirs the every width of stake deeply is 150mm, and the lap of splice for cheating the outer every width of tri-axes deep mixing stake is 250mm, and two rows are deep
It is 100mm to stir stake and the lap width of the vertical support pile of foundation ditch.During construction, first outer three axles of tri-axes deep mixing stake and hole are deep in construction hole
Stake is stirred, improves to chutable concrete extruding when can limit supporting construction perfusion and extends out or undergauge construction supporting again when its intensity
Stake.When the intensity of support pile reaches its design load, it then follows the principle excavation pit of " layering, be segmented, be symmetrical, balanced, in good time ".
When being excavated under Guan Liang designed elevation at 50cm, the construction of Guan Liang and first row anchor cable is carried out.Second row anchor cable hole is excavated to set
When counting under absolute altitude at 50cm, the construction of waist rail and second row anchor cable is carried out, is constructed successively until excavating to hole bottom designed elevation.
Embodiment 3：As shown in Fig. 1-4 and Fig. 6, piled anchor is used in cumulosol, silt and silty clay alternating layers stratum
When structure does foundation pit supporting system, excavation of foundation pit depth 8m.Support pile uses stake footpath as 900mm, and long 20m long auger fills
Note stake.The outer tri-axes deep mixing stake of tri-axes deep mixing stake and hole uses stake footpath as 700mm in hole, long 21m tri-axes deep mixing stake, three in hole
The lap of splice that axle stirs the every width of stake deeply is 200mm, and the lap of splice for cheating the outer every width of tri-axes deep mixing stake is 300mm, and two rows are deep
It is 150mm to stir stake and the lap width of the vertical support pile of foundation ditch.During construction, first outer three axles of tri-axes deep mixing stake and hole are deep in construction hole
Stake is stirred, improves to chutable concrete extruding when can limit supporting construction perfusion and extends out or undergauge construction supporting again when its intensity
Stake.When the intensity of support pile reaches its design load, it then follows the principle excavation pit of " layering, be segmented, be symmetrical, balanced, in good time ".
When being excavated under Guan Liang designed elevation at 50cm, the construction of Guan Liang and first row anchor cable is carried out.Second row anchor cable hole is excavated to set
When counting under absolute altitude at 50cm, the construction of waist rail and second row anchor cable is carried out, is constructed successively until excavating to hole bottom designed elevation.
Embodiment 4：As shown in Fig. 1-3 and Fig. 5,7, adopted in muck soil, silt, flour sand and silty clay alternating layers stratum
When doing foundation pit supporting system with diaphram wall inner support, excavation of foundation pit depth 16m.Diaphram wall thickness 1000mm, deep 30m.
The outer tri-axes deep mixing stake of tri-axes deep mixing stake and hole uses stake footpath as 850mm in hole, long 31m tri-axes deep mixing stake.Three axles are deep in hole
The lap of splice for stirring the every width of stake is 250mm, and the lap of splice for cheating the outer every width of tri-axes deep mixing stake is 350mm, and two rows stir stake deeply
Lap width with the vertical support pile of foundation ditch is 300mm.During construction, the outer tri-axes deep mixing of tri-axes deep mixing stake and hole in hole of first constructing
Stake, when its intensity improve to chutable concrete extruding when can limit supporting construction perfusion extend out or undergauge again under construction ground it is continuous
Wall.When the intensity of diaphram wall reaches its design load, it then follows the principle of " layering, be segmented, be symmetrical, balanced, in good time " is excavated
Foundation ditch.When being excavated under Guan Liang designed elevation at 50cm, the construction of Guan Liang and first row inner support is carried out.It is excavated in second row
When under supported design absolute altitude at 50cm, the construction of waist rail and second row inner support is carried out, constructs set until excavating to hole bottom successively
Count absolute altitude.
The specific embodiment of the present invention is explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned reality
Example is applied, can also be on the premise of present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Various changes can be made.
Claims (6)
1. one kind is applied to control foundation pit supporting construction forming method in soft soil horizon, it is characterised in that：Methods described it is specific
Step is as follows：
A, smooth location first, prepared for construction tri-axes deep mixing stake；
B, carry out having tri-axes deep mixing stake in the hole of spacing（1）With the outer tri-axes deep mixing stake in hole（2）Construction；
C, wait to cheat interior tri-axes deep mixing stake（1）With the outer tri-axes deep mixing stake in hole（2）After reaching intensity requirement, in two row's tri-axes deep mixing stakes
The middle vertical supporting construction of construction foundation pit（3）；
D, the vertical supporting construction of foundation ditch is treated（3）After reaching design strength, along the vertical supporting construction of foundation ditch（3）Inner side, it then follows " point
Layer, segmentation, it is symmetrical, balanced, in good time " principle excavation pit；
E, when being excavated to Guan Liang（4）Below designed elevation during 50cm, Guan Liang of constructing（4）With first row branch anchor structure（6）；
F, when being excavated to second row branch anchor structure（6）Below designed elevation during 50cm, waist rail of constructing（5）With second row branch anchor structure
（6）；
G, construct successively each row's branch anchor structure（6）, until being excavated to hole bottom designed elevation, complete the construction of whole supporting construction.
2. according to claim 1 be applied to control foundation pit supporting construction forming method in soft soil horizon, it is characterised in that：
In the step B, tri-axes deep mixing stake in hole（1）Positioned at the vertical supporting construction of foundation ditch（3）Inner side, stake footpath 650mm ~ 850mm it
Between, 150 ~ 250mm of lap width of every width, with the vertical supporting construction of foundation ditch（3）100 ~ 200mm of lap width, length compares base
Cheat vertical supporting construction（3）Long 1m is used to ensure the vertical supporting construction of foundation ditch（3）Quality.
3. according to claim 1 be applied to control foundation pit supporting construction forming method in soft soil horizon, it is characterised in that：
In the step B, outer tri-axes deep mixing stake is cheated（2）Positioned at the vertical supporting construction of foundation ditch（3）Outside, stake footpath 650mm ~ 850mm it
Between, 250 ~ 350mm of lap width of every width, with the vertical supporting construction of foundation ditch（3）100 ~ 200mm of lap width, length compares base
Cheat vertical supporting construction（3）Long 1m is used to ensure the vertical supporting construction of foundation ditch（3）Quality.
4. according to claim 1 be applied to control foundation pit supporting construction forming method in soft soil horizon, it is characterised in that：
In the step C, intensity requirement therein is tri-axes deep mixing stake in finger pit（1）With the outer tri-axes deep mixing stake in hole（2）Reach and can guarantee that
The vertical supporting construction of foundation ditch（3）Unlikely when pore-forming or grooving to cave in, and can limits its chutable concrete extruding in perfusion and extended out
Or intensity during undergauge.
5. according to claim 1 be applied to control foundation pit supporting construction forming method in soft soil horizon, it is characterised in that：
In the step C, the vertical supporting construction of foundation ditch（3）For diaphram wall, rotary digging drilling hole bored concrete pile or long screw auger drilling deposited pile,
Its wall thickness, stake footpath or length determine according to the requirement of foundation depth, geological conditions and foundation ditch surrounding enviroment condition.
6. according to claim 1 be applied to control foundation pit supporting construction forming method in soft soil horizon, it is characterised in that：
In described step E, F, G, branch anchor structure（6）For anchor cable, anchor pole, soil nailing, inner support diversified forms, by Foundation Pit Support Design personnel
Selected according to the concrete condition of foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710238.7A CN107503356A (en) | 2017-08-18 | 2017-08-18 | One kind is applied to control foundation pit supporting construction forming method in soft soil horizon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710238.7A CN107503356A (en) | 2017-08-18 | 2017-08-18 | One kind is applied to control foundation pit supporting construction forming method in soft soil horizon |
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| Publication Number | Publication Date |
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| CN107503356A true CN107503356A (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710710238.7A Pending CN107503356A (en) | 2017-08-18 | 2017-08-18 | One kind is applied to control foundation pit supporting construction forming method in soft soil horizon |
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| CN (1) | CN107503356A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1418277A1 (en) * | 2002-11-06 | 2004-05-12 | Chiaverotti BVBA | Method for constructing a retaining wall |
| CN102660955A (en) * | 2012-05-17 | 2012-09-12 | 上海强劲地基工程股份有限公司 | Quick construction method for foundation pit slope support |
| CN106120805A (en) * | 2016-06-23 | 2016-11-16 | 程华清 | The construction method of the ultra-deep foundation pit supporting under dilapidated house environment |
-
2017
- 2017-08-18 CN CN201710710238.7A patent/CN107503356A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1418277A1 (en) * | 2002-11-06 | 2004-05-12 | Chiaverotti BVBA | Method for constructing a retaining wall |
| CN102660955A (en) * | 2012-05-17 | 2012-09-12 | 上海强劲地基工程股份有限公司 | Quick construction method for foundation pit slope support |
| CN106120805A (en) * | 2016-06-23 | 2016-11-16 | 程华清 | The construction method of the ultra-deep foundation pit supporting under dilapidated house environment |
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Application publication date: 20171222 |