CN103835296B - The safeguard structure of polder area deep foundation pit support and construction method thereof - Google Patents
The safeguard structure of polder area deep foundation pit support and construction method thereof Download PDFInfo
- Publication number
- CN103835296B CN103835296B CN201210482419.6A CN201210482419A CN103835296B CN 103835296 B CN103835296 B CN 103835296B CN 201210482419 A CN201210482419 A CN 201210482419A CN 103835296 B CN103835296 B CN 103835296B
- Authority
- CN
- China
- Prior art keywords
- supporting
- delaying
- fill stratum
- construction
- slag fill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 47
- 239000002893 slag Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000004888 barrier function Effects 0.000 claims abstract description 19
- 239000004927 clay Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 8
- 238000009412 basement excavation Methods 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 8
- 238000005056 compaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of safeguard structure of polder area deep foundation pit support, include the foundation ditch (1) excavated out at polder area, surrounding in described foundation ditch is provided with supporting (2), the top of the beach argillic horizon (3) in polder area is provided with slag fill stratum (4) of delaying, it is characterized in that: described in delay and between slag fill stratum (4) and supporting (2), to be provided with the water barrier (5) of the clay material both blocked, described in the delay surface of slag fill stratum (4) and water barrier (5) be provided with concrete pavement (6).Wherein clay can be gathered materials on the spot; cost can not be increased; utilize the hyposmosis coefficient of clay in addition; can intercept or slow down seepage water to infiltrate to supporting from slag fill stratum of delaying; reduce seepage water and extra lateral pressure is caused to supporting; available protecting supporting, is also convenient to the construction of the supporting adopting cement mixing pile in addition.
Description
Technical field
The present invention relates to a kind of polder area deep foundation pit support, particularly relate to a kind of safeguard structure and construction method thereof of polder area deep foundation pit support.
Background technology
For ensureing the safety of Underground Construction and foundation ditch surrounding enviroment, the gear needing to adopt foundation pit side-wall and surrounding enviroment, to reinforce and safeguard measure.Housing project is built, and often face deep pit digging, the computational methods of current Base hole supporting technology structure are not yet completely unified, and therefore the research of deep foundation pit support problem will be long-term, vigorous.The construction technology of excavation of foundation pit generally has two kinds: put slope excavation (non-support excavation) and excavation (having supporting excavation) under supporting and protection structure protection.The former is not only simple but also economical, can ensure the condition of stability of slope, should preferentially select when open territory or surrounding environment allow.Generally selected supporting excavation compared with the excavation of deep foundation ditch, supporting divides gear soil part and supports or (drawing anchor) two parts, and form of structure has multiple, and the selection of Supporting System of Deep Excavations is exactly determine supporting and protection structure.Pattern foundation pit supporting structure normal method: sheet pile formula, colonnade formula, diaphragm wall, self-supporting cement retaining wall, SMW method, open caisson (case) method, sheet pile formula is applicable to cohesive soil, sandy soil and grain through being not more than the sand cobble stratum of 100mm, because Pile Driving Noise during construction is large, should be used in the middle of the construction away from residential block.Colonnade formula branch borehole castinplace pile and digging hole filling pile, construction noise is little, is suitable for city construction.Diaphragm wall work construction method advantage: vibrate during construction little, noise is low, wall stiffness is large, little to surrounding formations disturbance; Be applicable to multiple soil layer.
Application number is the Chinese invention patent " static steel structure pile is applied to the method for deep foundation pit support " of CN200710052232.1 (publication number is CN101054802A), application number is the Chinese utility model patent " method for supporting and protecting row pile pit " of CN200810152925.2 (notification number is CN101408023A), and application number is the Chinese utility model patent " a kind of steel sheet pile pile tube combined foundation ditch support structure and supporting method thereof " of CN201110031259.9 (notification number is CN102140798A), they disclose various different supporting and protection structure.
For the supporting construction of polder area, there are special requirement, because beach soil property is soft, certain thickness dregs of delaying need be laid before construction on argillic horizon top and form slag fill stratum of delaying, then the construction of foundation ditch peripheral branch protection structure is carried out, supporting and protection structure can be adopt the bored pile of cement mixing pile and a determining deviation to construct Guan Liang again, finally concrete pavement is set on the surface of slag fill stratum of delaying, so just, can walk on concrete pavement and run various apparatus, the void content of slag fill stratum of delaying as everyone knows is large, running in precipitation situation, delay to have in slag fill stratum and produce a lot of seepage water, the top of seepage water to supporting and protection structure produces new pressurized energy, thus it is unfavorable to supporting and protection structure, although supporting and protection structure has sealing effect, but a large amount of seepage water also can partly be infiltrated or be poured in foundation ditch by top.
Summary of the invention
Technical problem to be solved by this invention provides a kind of safeguard structure intercepting or slow down that seepage water invades the polder area deep foundation pit support in foundation ditch for above-mentioned prior art present situation.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of safeguard structure of polder area deep foundation pit support, be included in the foundation ditch that polder area excavates out, surrounding in foundation ditch is provided with supporting, the top of the beach argillic horizon in polder area is provided with slag fill stratum of delaying, it is characterized in that: described in delay and between slag fill stratum and supporting, to be provided with the water barrier of the clay material both blocked, described in the delay surface of slag fill stratum and water barrier be provided with concrete pavement.
The width of above-mentioned water barrier is greater than 2 meters.
The raceway groove that intercepts water is excavated in contiguous supporting position, above-mentioned water barrier top.The water flow energy pouring into foundation ditch like this from concrete pavement is discharged fast by the raceway groove that intercepts water, and reduces the lateral pressure to supporting.
On above-mentioned slag fill stratum of delaying, excavation has multiple dewatering well, and the top of dewatering well is provided with the dewatering well flange extended upward above concrete pavement.Arrange dewatering well can make to penetrate into delay slag fill stratum to dewatering well concentrate, as dewatering well internal water accumulation exceedes the mobile degree of depth, we can with water pump by dewatering well water extract out.
Above-mentioned dewatering well arranges one every 15 ~ 20 meters, and the degree of depth of dewatering well is greater than the thickness of slag fill stratum of delaying.The spacing distance of this dewatering well can guarantee that each dewatering well is fully utilized, and the setting that simultaneously also can not increase because of too much dewatering well causes the increase of operating expenses.
The planar dimension of above-mentioned dewatering well is 0.8m*0.8m.
Present invention also offers a kind of construction method of safeguard structure of aforementioned polder area deep foundation pit support, comprise following construction sequence:
Step 1, beach argillic horizon is laid with dregs of delaying and forms certain thickness slag fill stratum of delaying;
Step 2, determines foundation ditch sideline, and the slag blanket of delaying diging up certain depth along periphery, foundation ditch sideline forms pit, and the degree of depth of pit is the thickness of slag fill stratum of delaying, and the width of pit is that supporting width separately adds 3 meters;
Step 3, adds cohesive soil in the pit diging up slag fill stratum of delaying and compaction in layers forms water barrier;
Step 4, foundation ditch sideline is carried out supporting construction and forms supporting;
Step 5, carries out excavation of foundation pit, simultaneously intersect carry out dewatering well, the construction of intercept water raceway groove and concrete pavement.
This construction method step is reasonable in design, constructability, and high construction efficiency.
Above-mentioned supporting construction comprises the construction of cement mixing pile facility, the construction of the bored pile facility of a determining deviation and the construction of hat beam facility.Certainly also other supporting construction mode can be adopted as required.
Compared with prior art; the utility model has the advantage of: it is provided with the water barrier of the clay material both blocked between slag fill stratum and supporting delaying; wherein clay can be gathered materials on the spot; cost can not be increased; utilize the hyposmosis coefficient of clay in addition, can intercept or slow down seepage water and infiltrate to supporting from slag fill stratum of delaying, reduce seepage water and extra lateral pressure is caused to supporting; available protecting supporting, is also convenient to the construction of the supporting adopting cement mixing pile in addition.
Accompanying drawing explanation
Fig. 1 is the structural representation after safeguard structure carries out construction sequence 1,2;
Fig. 2 is the structural representation after safeguard structure carries out construction sequence 3;
Fig. 3 is for completing the structural representation of the safeguard structure after constructing in steps.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Figure 3, be a preferred embodiment of the present invention.
A kind of safeguard structure of polder area deep foundation pit support, include the foundation ditch 1 excavated out at polder area, surrounding in foundation ditch is provided with supporting 2, the top of the beach argillic horizon 3 in polder area is provided with slag fill stratum 4 of delaying, delay and be provided with the water barrier 5 of the clay material both blocked between slag fill stratum 4 and supporting 2, the width L of water barrier 5 is greater than 3 meters.Clay can be taken in the venue, and the surface of delay slag fill stratum 4 and water barrier 5 is provided with concrete pavement 6.
The raceway groove 7 that intercepts water is excavated in contiguous supporting 2 position, water barrier 5 top.
Excavation on slag fill stratum 4 of delaying has multiple dewatering well 8, dewatering well 8 arranges one every 15 ~ 20 meters, the planar dimension of dewatering well 8 is 0.8m*0.8m, the degree of depth of dewatering well 8 is greater than the thickness of slag fill stratum of delaying, and the top of dewatering well 8 is provided with the dewatering well flange 81 extended upward above concrete pavement 6.
It is provided with the water barrier of the clay material both blocked between slag fill stratum and supporting delaying; wherein clay can be gathered materials on the spot; cost can not be increased; utilize the hyposmosis coefficient of clay in addition; can intercept or slow down seepage water to infiltrate to supporting from slag fill stratum of delaying; reduce seepage water and extra lateral pressure is caused to supporting, available protecting supporting, be also convenient to the construction of the supporting adopting cement mixing pile in addition.
A construction method for the safeguard structure of aforementioned polder area deep foundation pit support, comprises following construction sequence:
Step 1, beach argillic horizon 3 is laid with dregs of delaying and forms certain thickness slag fill stratum 4 of delaying;
Step 2, determines foundation ditch sideline, and the slag fill stratum 4 of delaying diging up certain depth along periphery, foundation ditch sideline forms pit 9, and the degree of depth of pit 9 is the thickness of slag fill stratum of delaying, and the width S of pit 9 is that supporting width D separately adds 3 meters;
Above step 1,2 is with reference to shown in figure 1.
Step 3, adds cohesive soil in the pit 9 diging up slag fill stratum of delaying and compaction in layers forms water barrier 5; This step is with reference to shown in figure 2.
Step 4, foundation ditch sideline is carried out supporting construction and forms supporting 2;
Step 5, carries out foundation ditch 1 and excavates, simultaneously intersect carry out dewatering well 8, the construction of intercept water raceway groove 7 and concrete pavement 6.Step 4,5 is with reference to shown in figure 3.
Wherein supporting construction comprises the construction of cement mixing pile facility, the construction of the bored pile facility of a determining deviation and the construction of hat beam facility.
Claims (8)
1. the safeguard structure of a polder area deep foundation pit support, include the foundation ditch (1) excavated out at polder area, surrounding in described foundation ditch is provided with supporting (2), the top of the beach argillic horizon (3) in polder area is provided with slag fill stratum (4) of delaying, it is characterized in that: described in delay and between slag fill stratum (4) and supporting (2), to be provided with the water barrier (5) of the clay material both blocked, described in the delay surface of slag fill stratum (4) and water barrier (5) be provided with concrete pavement (6).
2. the safeguard structure of polder area deep foundation pit support according to claim 1, is characterized in that: the width (L) of described water barrier (5) is greater than 3 meters.
3. the safeguard structure of polder area deep foundation pit support according to claim 1, is characterized in that: the raceway groove (7) that intercepts water is excavated in contiguous supporting (2) position, described water barrier (5) top.
4. the safeguard structure of polder area deep foundation pit support according to claim 3, it is characterized in that: described in the upper excavation of slag fill stratum (4) of delaying have multiple dewatering well (8), the top of dewatering well (8) is provided with the dewatering well flange (81) extending upward concrete pavement (6) top.
5. the safeguard structure of polder area deep foundation pit support according to claim 4, it is characterized in that: described dewatering well (8) arranges one every 15 ~ 20 meters, the degree of depth (H) of dewatering well (8) is greater than the thickness of slag fill stratum of delaying.
6. the safeguard structure of polder area deep foundation pit support according to claim 4, is characterized in that: the planar dimension of described dewatering well (8) is 0.8m*0.8m.
7. a construction method for the safeguard structure of polder area deep foundation pit support as claimed in claim 4, comprises following construction sequence:
Step 1, beach argillic horizon (3) is laid with dregs of delaying and forms certain thickness slag fill stratum (4) of delaying;
Step 2, determine foundation ditch sideline, the slag fill stratum (4) of delaying diging up certain depth along periphery, foundation ditch sideline forms pit (9), the degree of depth of pit (9) is the thickness of slag fill stratum of delaying, and the width (S) of pit (9) separately adds 3 meters for supporting width (D);
Step 3, adds cohesive soil in the pit (9) diging up slag fill stratum of delaying and compaction in layers forms water barrier (5);
Step 4, foundation ditch sideline is carried out supporting construction and forms supporting (2);
Step 5, carry out foundation ditch (1) excavation, intersection carries out the construction of dewatering well (8), the raceway groove that intercepts water (7) and concrete pavement (6) simultaneously.
8. construction method according to claim 7, is characterized in that: described supporting construction comprises the construction of cement mixing pile facility, the construction of the bored pile facility of a determining deviation and the construction of hat beam facility.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482419.6A CN103835296B (en) | 2012-11-22 | 2012-11-22 | The safeguard structure of polder area deep foundation pit support and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482419.6A CN103835296B (en) | 2012-11-22 | 2012-11-22 | The safeguard structure of polder area deep foundation pit support and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103835296A CN103835296A (en) | 2014-06-04 |
| CN103835296B true CN103835296B (en) | 2015-10-28 |
Family
ID=50799161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210482419.6A Active CN103835296B (en) | 2012-11-22 | 2012-11-22 | The safeguard structure of polder area deep foundation pit support and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103835296B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298211B (en) * | 2023-05-15 | 2023-08-11 | 西南石油大学 | Test device and method for simulating excavation erosion of water-bearing stratum in near tunnel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264691A (en) * | 2004-03-16 | 2005-09-29 | Hiromoto Iizawa | Device for bearing cover supporting frame for frost heave |
| CN102162250A (en) * | 2010-02-24 | 2011-08-24 | 中国二十冶集团有限公司 | Protective construction method of excavating large area deep foundation pit in running sand confined water soil layer |
| CN102345300A (en) * | 2011-07-12 | 2012-02-08 | 中交四航工程研究院有限公司 | Construction method of underground structures of seacoasts and artificial islands |
| CN102644286A (en) * | 2012-04-10 | 2012-08-22 | 广东天竟建设有限公司 | Deep foundation pit supporting structure |
| CN203022005U (en) * | 2012-11-22 | 2013-06-26 | 浙江海洋学院 | Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure |
-
2012
- 2012-11-22 CN CN201210482419.6A patent/CN103835296B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264691A (en) * | 2004-03-16 | 2005-09-29 | Hiromoto Iizawa | Device for bearing cover supporting frame for frost heave |
| CN102162250A (en) * | 2010-02-24 | 2011-08-24 | 中国二十冶集团有限公司 | Protective construction method of excavating large area deep foundation pit in running sand confined water soil layer |
| CN102345300A (en) * | 2011-07-12 | 2012-02-08 | 中交四航工程研究院有限公司 | Construction method of underground structures of seacoasts and artificial islands |
| CN102644286A (en) * | 2012-04-10 | 2012-08-22 | 广东天竟建设有限公司 | Deep foundation pit supporting structure |
| CN203022005U (en) * | 2012-11-22 | 2013-06-26 | 浙江海洋学院 | Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103835296A (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101270579B (en) | Foundation pit guard method for expansion construction from deep foundation pit to shallow foundation pit | |
| CN202689031U (en) | Deep foundation pit retaining and protecting retaining wall | |
| CN104947682A (en) | Foundation pit support construction method and device thereof | |
| CN102116028B (en) | Method and structure for excavating soil in core tube region based on raft pile supporting | |
| CN105464074B (en) | A kind of artificial digging pile high polymer grouting safeguard structure and its construction method | |
| CN205314116U (en) | Continuous type of combined type drilling cling compound structure | |
| CN207003499U (en) | A kind of anti-floating lifting device of underground tunnel upper excavation of foundation pit | |
| CN107012871B (en) | A kind of suspension type goes along with sb. to guard him the deep reversed construction method for greatly enhancing foundation pit fabricated construction | |
| CN103410152B (en) | A kind of construction method for long and narrow deep foundation pit earthwork digging | |
| CN108560536A (en) | The continuous piling wall construction method of Soil-cement | |
| CN110004935A (en) | A kind of locally deep pit drain measure trench system and construction method | |
| CN109594575A (en) | A kind of open caisson periphery grouting and reinforcing soil body construction method | |
| CN207003421U (en) | A kind of steel plate pilework for being seated hard rock top surface | |
| CN104652444A (en) | Construction method for overall reverse operation of ultra-large type deep foundation pit center island type alternative earth excavation | |
| CN203939036U (en) | A kind of steel sheet pile cofferdam structure that is applicable to river course | |
| CN107059914A (en) | A kind of ring-type for being used for shallow overburden or naked rock area in water is embedded to set basis | |
| CN207331746U (en) | A kind of underground pipe gallery | |
| CN109881683A (en) | A kind of more sublevel retaining structures and its construction method for combining artificial earth fill's grouting reinforcement technique | |
| CN204715364U (en) | A kind of foundation pit support device | |
| CN205382942U (en) | Multilayer underground space curtain posture subsurface excavated construction's supporting construction under existing facility | |
| CN208441083U (en) | Half coercion underground continuous wall structure | |
| CN103835296B (en) | The safeguard structure of polder area deep foundation pit support and construction method thereof | |
| CN103866787B (en) | A kind of spacious reverse masonry method concrete cut that digs builds construction technology | |
| CN102425179A (en) | Reinforced soil infiltration ditch structure supported by miniature steel pipe cast-in-place pile | |
| CN203022005U (en) | Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Putuo University of Science and Technology, No. 127 Datong Road, Zhujiajian Street, Putuo District, Zhoushan City, Zhejiang Province, 316111 Patentee after: Zhejiang Ocean University Address before: Putuo University of Science and Technology, No. 127 Datong Road, Zhujiajian Street, Putuo District, Zhoushan City, Zhejiang Province, 316111 Patentee before: ZHEJIANG OCEAN University |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20140604 Assignee: Lvcheng Technology Services (Zhoushan) Co.,Ltd. Assignor: Zhejiang Ocean University Contract record no.: X2023980045987 Denomination of invention: Protective structure and construction method of deep foundation pit support in mudflat reclamation area Granted publication date: 20151028 License type: Common License Record date: 20231106 |