CN104929133B - The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake - Google Patents
The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake Download PDFInfo
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- CN104929133B CN104929133B CN201510310500.XA CN201510310500A CN104929133B CN 104929133 B CN104929133 B CN 104929133B CN 201510310500 A CN201510310500 A CN 201510310500A CN 104929133 B CN104929133 B CN 104929133B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 91
- 239000010959 steel Substances 0.000 title claims abstract description 91
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000004162 soil erosion Methods 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 4
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Abstract
Sloping timbering construction method at the bottom of a kind of deep basal pit Larsen steel sheet pile stake, mainly includes trying sheet piling, surveying setting-out, inserted to play sheet pile, excavation of foundation pit, and layering is installed and supported, puts the operations such as slope at the bottom of stake.The present invention uses at sloping timbering at the bottom of stake, coordinates and stacks the method such as earth bag casting concrete cofferdam, efficiently solves under decomposed rock geological conditions, the potential safety hazard that Larsen steel sheet pile is caused when cannot get to designed elevation, constructing operation is easy, has ensured construction speed, has saved construction cost.
Description
Technical field
The invention belongs to the construction method of deep foundation ditch field in decomposed rock geological conditions, particularly to the construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake, it is also possible to applied for like deep foundation pit construction in.
Background technology
Come one after another recently as the development of communication, advanced road and the grand bridge technical barrier that while the most flourish, bridge deep foundation pit construction is brought.Such as Larsen steel sheet pile pounds difficulty, stake end elevation cannot meet the potential safety hazard that design requires to be brought, and long construction period, for effectively solving a deep pit construction difficult problem, ensure construction safety, there is provided sloping timbering construction method at the bottom of a kind of deep basal pit Larsen steel sheet pile stake, it is ensured that construction safety, save construction cost.
Summary of the invention
It is an object of the invention to provide the construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake, this method is safe and reliable.
Sloping timbering construction method at the bottom of a kind of deep basal pit Larsen steel sheet pile stake.
Larsen steel sheet pile is beaten in the first step, examination.
First detection subsurface rock layer position.The deep basal pit scope of each size cushion cap is primarily determined that with reference to design drawing, in the range of the deep basal pit of each cushion cap, Larsen steel sheet pile is beaten in examination, multiple point is beaten in the deep basal pit examination of each cushion cap, in the range of calculating the deep basal pit of each cushion cap, the most shallow Larsen steel sheet pile elevation of bottom of driving depth squeezes into absolute altitude spacing H away from design requirement, and then calculate put slope width L=(H+0.5 in the range of the deep basal pit of each cushion cap) × 2, (unit is: rice).
Second step, inserted to play Larsen steel sheet pile.
Determine Larsen steel sheet pile inserted to play scope, the Larsen i.e. deep basal pit scope of sheet pile inserted to play scope.
Corresponding each deep basal pit, according to the cushion cap of each deep basal pit, corresponding working width and the length and width putting slope width L calculating deep basal pit.
Deep basal pit length x=cushion cap length+working width+put slope width.Deep basal pit width y=cushion cap width+working width+put slope width.After drawing the sideline of each deep basal pit (length and width), by each self-corresponding sideline at each deep basal pit surveying and locating by root inserted to play Larsen steel sheet pile.
Excessive with deep foundation pit support sideline deviation for preventing from being actually inserted into Larsen steel sheet pile, it is to avoid the bending deformation of Larsen steel sheet pile improves the penetration capability of Larsen steel sheet pile simultaneously, taking during Larsen steel sheet pile inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile inserted to play, often complete 3 meters and measure correction 1 time, it is ensured that the straight cis degree of Larsen steel sheet pile.
3rd step, deep pit digging and supporting.
During deep pit digging, use and start from top to bottom from ground, stage excavation, the mode of layering supporting, forbid to draw wide open digging.Bracing members is used to carry out deep foundation pit support.
Slope is put bottom 4th step, deep basal pit.
Bottom each deep basal pit, the method putting slope is all used to construct.
Putting the basic principle on slope is to squeeze into the most shallow Larsen steel sheet pile root up position of 0.5 meter in each deep basal pit to start (a=0.5m shown in Fig. 2), leaves 1 meter of sheet pile face (b=1m shown in Fig. 2).
The sloping coefficient using 1:2 carries out putting slope.
5th step, when soil property is slightly worse, protect at the bottom of heap earth bag casting concrete makees Larsen steel sheet pile stake on the basis of slope putting, play Larsen steel sheet pile, iron plate protection, artificial digging pile protection if desired etc. there being soil erosion monitoring to have the position of deformation to add.
In the 3rd described step, cushion cap bottom design absolute altitude can be 6-9m.
H in the technical program can be 0.75-1m.
Examination is beaten and is squeezed into Larsen steel sheet pile in Larsen steel sheet pile and second step and all may utilize 70 tons of pedrail cranes, cooperation DZJ-150 type vibration hammer.
Have an advantage in that:
The present invention is by using the construction method of sloping timbering bottom deep basal pit, effectively solve when carrying out deep foundation pit construction under decomposed rock geological conditions, Larsen steel sheet pile pounds difficulty, stake end elevation cannot meet the potential safety hazard that design requires to be brought, ensure construction speed, save engineering cost.Comparing the construction method of other complexity, this method more saves resource.And coordinating method such as stacking earth bag casting concrete cofferdam etc., efficiently solve under decomposed rock geological conditions, constructing operation is easy, has ensured construction speed, has saved construction cost.Carry out sloping timbering process at the bottom of deep basal pit sheet pile stake, and then meet bearing platform construction requirement.Ensure bearing platform construction safety.
Accompanying drawing illustrates:
Fig. 1 is deep basal pit top view.
Fig. 2 be at the bottom of sloping timbering schematic diagram.
Fig. 3 is construction flow chart.
Detailed description of the invention
Embodiment
1
Sloping timbering construction method at the bottom of a kind of deep basal pit Larsen steel sheet pile stake, specifically includes the following step:
Larsen steel sheet pile 2 is beaten in the first step, examination.
First detection subsurface rock layer 3 position.Primarily determine that the deep basal pit scope (long × wide) of cushion cap 1 with reference to design drawing, be respectively as follows: 5.6 × 5.6m.
70 tons of crawler cranes are utilized to coordinate DZJ-150 type vibration hammer to try to beat Larsen steel sheet pile 2 in the range of the deep basal pit of cushion cap 1, in the range of the deep basal pit of cushion cap 1,10 points are made a call in examination, calculate the most shallow Larsen steel sheet pile 2 elevation of bottom of driving depth in the range of the deep basal pit of cushion cap 1 and squeeze into absolute altitude spacing H=1m away from design requirement, so calculate put slope width L=(1.0+0.5) × 2=3.0m.
Second step, inserted to play Larsen steel sheet pile 2.
Determine Larsen steel sheet pile 2 inserted to play scope, Larsen steel sheet pile 2 inserted to play scope i.e. deep basal pit scope, deep basal pit length x=cushion cap 1 length+working width+put slope width；Deep basal pit width y=cushion cap 1 width+working width+put slope width.Corresponding cushion cap 1 size draws: deep basal pit length=5.6+1+3.0=9.6m, deep basal pit width=5.6+1+3.0=9.6m.
(being defined as 1m in conjunction with design drawing and engineering real work working width), by this sideline surveying and locating by root inserted to play Larsen steel sheet pile 2.
Excessive with deep foundation pit support sideline deviation for preventing from being actually inserted into Larsen steel sheet pile 2, it is to avoid the bending deformation of Larsen steel sheet pile 2 improves the penetration capability of Larsen steel sheet pile 2 simultaneously, taking during Larsen steel sheet pile 2 inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile 2 inserted to play, often complete 3 meters and measure correction 1 time, it is ensured that the straight cis degree of Larsen steel sheet pile 2.
3rd step, deep pit digging and supporting.
During deep pit digging, use and start from top to bottom from ground 5, stage excavation, the mode of layering supporting, forbid to draw wide open digging.Bracing members 4 is used to carry out deep foundation pit support.Cushion cap 1 bottom design absolute altitude 6m.
Slope is put bottom 4th step, deep basal pit.
Bottom deep basal pit, the method putting slope is used to construct.
The basic principle putting slope is to start at the position squeezing into the most shallow Larsen steel sheet pile 1 root up 0.5m, leaves sheet pile face 1m.
The sloping coefficient using 1:2 carries out putting slope.
5th step, when soil property is slightly worse, on the basis of putting slope heap earth bag casting concrete make at the bottom of stake protect, have soil erosion monitoring have the position of deformation can add beat Larsen steel sheet pile 2, iron plate protection, artificial digging pile protection if desired etc..
Embodiment
2
Sloping timbering construction method at the bottom of a kind of deep basal pit Larsen steel sheet pile stake, specifically includes the following step:
Larsen steel sheet pile 2 is beaten in the first step, examination.
First detection subsurface rock layer 3 position.Primarily determine that with reference to design drawing the deep basal pit scope (long × wide) of cushion cap 1 is respectively as follows: 67.6 × 9m.
70 tons of crawler cranes are utilized to coordinate DZJ-150 type vibration hammer to try to beat Larsen steel sheet pile 2 in the range of the deep basal pit of cushion cap 1, in the range of the deep basal pit of cushion cap 1,10 points are made a call in examination, calculate the most shallow Larsen steel sheet pile 2 elevation of bottom of driving depth in the range of the deep basal pit of cushion cap 1 and squeeze into absolute altitude spacing H=0.9m away from design requirement, so calculate put slope width L=(0.9+0.5) × 2=2.8m.
Second step, inserted to play Larsen steel sheet pile 2.
Determine Larsen steel sheet pile 2 inserted to play scope, Larsen steel sheet pile 2 inserted to play scope i.e. deep basal pit scope, deep basal pit length x=cushion cap 1 length+working width+put slope width；Deep basal pit width y=cushion cap 1 width+working width+put slope width.
Deep basal pit length=67.6+1+2.8=71.4m, deep basal pit width=9+1+2.8=12.8m；
(working width is defined as 1m), by this sideline surveying and locating by root inserted to play Larsen steel sheet pile 2.
Excessive with deep foundation pit support sideline deviation for preventing from being actually inserted into Larsen steel sheet pile 2, it is to avoid the bending deformation of Larsen steel sheet pile 2 improves the penetration capability of Larsen steel sheet pile 2 simultaneously, taking during Larsen steel sheet pile 2 inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile 2 inserted to play, often complete 3m and measure correction 1 time, it is ensured that the straight cis degree of Larsen steel sheet pile 2.
3rd step, deep pit digging and supporting.
During deep pit digging, use and start from top to bottom from ground 5, stage excavation, the mode of layering supporting, forbid to draw wide open digging.Bracing members 4 is used to carry out deep foundation pit support, cushion cap 1 bottom design absolute altitude 9m.
Slope is put bottom 4th step, deep basal pit.
Bottom deep basal pit, the method putting slope is used to construct.The basic principle putting slope is to start at the position squeezing into the most shallow Larsen steel sheet pile 2 root up 0.5m, leaves sheet pile face 1m.
The sloping coefficient using 1:2 carries out putting slope.
5th step, when soil property is slightly worse, on the basis of putting slope heap earth bag casting concrete make at the bottom of stake protect, have soil erosion monitoring have the position of deformation can add beat Larsen steel sheet pile 2, iron plate protection, artificial digging pile protection if desired etc..
Embodiment
3
Sloping timbering construction method at the bottom of a kind of deep basal pit Larsen steel sheet pile 2, specifically includes the following step:
Larsen steel sheet pile 2 is beaten in the first step, examination.
First detection subsurface rock layer 3 position.Deep basal pit scope (long × wide) with reference to the preliminary cushion cap of design drawing 1 is respectively as follows: 16 × 5.6m.
70 tons of crawler cranes are utilized to coordinate DZJ-150 type vibration hammer to try to beat Larsen steel sheet pile 2 in the range of the deep basal pit of cushion cap 1,10 points are made a call in the examination of each foundation ditch, calculate the most shallow Larsen steel sheet pile 2 elevation of bottom of driving depth in the range of the deep basal pit of cushion cap 1 and squeeze into absolute altitude spacing H=0.75m away from design requirement, so calculate put slope width L=(0.75+0.5) × 2=2.5m.
Second step, inserted to play Larsen steel sheet pile 2.
Determine Larsen steel sheet pile 2 inserted to play scope, Larsen steel sheet pile 2 inserted to play scope i.e. deep basal pit scope, deep basal pit length x=cushion cap 1 length+working width+put slope width；Deep basal pit width y=cushion cap 1 width+working width+put slope width.
Deep basal pit length=16+1+2.5=19.5m, deep basal pit width=5.6+1+2.5=9.1m, by this sideline surveying and locating by root inserted to play Larsen steel sheet pile 2.
Excessive with deep foundation pit support sideline deviation for preventing from being actually inserted into Larsen steel sheet pile 2, it is to avoid the bending deformation of Larsen steel sheet pile 2 improves the penetration capability of Larsen steel sheet pile 2 simultaneously, taking during Larsen steel sheet pile 2 inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile 2 inserted to play, often complete 3m and measure correction 1 time, it is ensured that the straight cis degree of Larsen steel sheet pile 2.
3rd step, deep pit digging and supporting.
During deep pit digging, use and start from top to bottom from ground 5, stage excavation, the mode of layering supporting, forbid to draw wide open digging.Bracing members 4 is used to carry out deep foundation pit support, cushion cap 1 bottom design absolute altitude 8m.
Slope is put bottom 4th step, deep basal pit.
Bottom deep basal pit, the method putting slope is used to construct.The basic principle putting slope is to start at the position squeezing into the most shallow Larsen steel sheet pile 2 root up 0.5m, leaves sheet pile face 1m.
The sloping coefficient using 1:2 carries out putting slope.
5th step, when soil property is slightly worse, on the basis of putting slope heap earth bag casting concrete make at the bottom of stake protect, have soil erosion monitoring have the position of deformation can add beat Larsen steel sheet pile 2, iron plate protection, artificial digging pile protection if desired etc..Cushion cap 1 bottom periphery is provided with gutter 6.
Claims (7)
1. sloping timbering construction method at the bottom of a deep basal pit Larsen steel sheet pile stake, it is characterised in that bag
Include following step:
Larsen steel sheet pile (2) is beaten in the first step, examination；
First detection subsurface rock layer (3) position；Determine the deep basal pit scope of each cushion cap (1),
In the range of the deep basal pit of cushion cap (1), Larsen steel sheet pile (2) is beaten in examination, each cushion cap (1)
In the range of deep basal pit, multiple point is beaten in examination, and the deep basal pit scope calculating each cushion cap (1) is squeezed into deeply
Spend the most shallow Larsen steel sheet pile (2) elevation of bottom and squeeze into absolute altitude spacing H away from design requirement, enter
And put slope width L=(H+0.5) × 2m in the range of calculating the deep basal pit of each cushion cap (1)；
Second step, inserted to play Larsen steel sheet pile (2)；
Determining Larsen steel sheet pile (2) inserted to play scope, Larsen steel sheet pile (2) inserted to play scope is the deepest
Foundation ditch scope,
Corresponding each deep basal pit, according to cushion cap, the corresponding working width of each deep basal pit with put
Slope width L calculates the length and width of deep basal pit；
Deep basal pit length=cushion cap length+working width+put slope width；Deep basal pit width=cushion cap width
Degree+working width+put slope width；Draw the sideline of each deep basal pit, by corresponding sideline often
Individual deep basal pit surveying and locating is by root inserted to play Larsen steel sheet pile (2)；
3rd step, deep pit digging and supporting；
Slope is put bottom 4th step, deep basal pit；
Bottom each deep basal pit, the method putting slope is all used to construct；
Larsen steel sheet pile (2) the root up 0.5m that driving depth is the most shallow in each deep basal pit
Position start, leave sheet pile face 1m；
The sloping coefficient using 1:2 carries out putting slope.
Sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake the most according to claim 1
Construction method, it is characterised in that: in the 3rd described step, cushion cap (1) bottom design absolute altitude is
6-9m。
Sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake the most according to claim 2
Construction method, it is characterised in that: described H is 0.75-1m.
Sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake the most according to claim 3
Construction method, it is characterised in that:
H=1m in the first step；
In 3rd step, cushion cap (1) bottom design absolute altitude is 6m.
Sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake the most according to claim 3 is executed
Work method, it is characterised in that:
H=0.9m in the first step；
In 3rd step, cushion cap (1) bottom design absolute altitude is 9m.
Sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake the most according to claim 3
Construction method, it is characterised in that:
H=0.75m in the first step；
In 3rd step, cushion cap (1) bottom design absolute altitude is 8m.
Sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake the most according to claim 1 is executed
Work method, it is characterised in that:
After the 4th described step, on the basis of putting slope, heap earth bag casting concrete is made at the bottom of stake
Protection, have soil erosion monitoring have the position of deformation add beat Larsen steel sheet pile (2), iron plate prevent
Protect or caisson protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510310500.XA CN104929133B (en) | 2015-06-09 | 2015-06-09 | The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake |
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| CN201510310500.XA CN104929133B (en) | 2015-06-09 | 2015-06-09 | The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake |
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| CN104929133B true CN104929133B (en) | 2016-11-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107503354A (en) * | 2016-06-14 | 2017-12-22 | 五冶集团上海有限公司 | A kind of tower crane goes along with sb. to guard him bracing reinforcement and excavation method |
| CN107326929A (en) * | 2017-08-07 | 2017-11-07 | 中国十七冶集团有限公司 | A kind of method of Duo Cang undergrounds integrated pipe earth excavation under Larsen steel sheet pile supporting |
| CN108179754A (en) * | 2017-12-29 | 2018-06-19 | 上海市机械施工集团有限公司 | The construction method of long and narrow Extra-Deep Foundation Pit system |
| CN108589543B (en) * | 2018-05-14 | 2019-07-23 | 中铁七局集团有限公司勘测设计研究院 | The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology |
| CN113622434B (en) * | 2021-08-11 | 2022-10-11 | 中建安装集团有限公司 | Construction method for supporting and water stopping of Larsen steel sheet pile of deep foundation pit |
| CN114775664A (en) * | 2022-05-24 | 2022-07-22 | 中铁一局集团有限公司 | Steel sheet pile cofferdam construction method for deep foundation pit and steel sheet pile cofferdam |
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| JP2009102818A (en) * | 2007-10-22 | 2009-05-14 | Takenaka Komuten Co Ltd | Connection structure between pillar and steel pipe pile |
| CN102363961A (en) * | 2011-11-11 | 2012-02-29 | 中交四航局第一工程有限公司 | Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof |
| CN202298600U (en) * | 2011-10-21 | 2012-07-04 | 郭根维 | Lassen steel sheet pile for foundation pit supporting and protecting construction |
| CN202401462U (en) * | 2011-11-11 | 2012-08-29 | 中交四航局第一工程有限公司 | Deep-water single-wall steel sheet pile cofferdam structure with small soil penetration depth |
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- 2015-06-09 CN CN201510310500.XA patent/CN104929133B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009102818A (en) * | 2007-10-22 | 2009-05-14 | Takenaka Komuten Co Ltd | Connection structure between pillar and steel pipe pile |
| CN202298600U (en) * | 2011-10-21 | 2012-07-04 | 郭根维 | Lassen steel sheet pile for foundation pit supporting and protecting construction |
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