CN203022005U - Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure - Google Patents
Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure Download PDFInfo
- Publication number
- CN203022005U CN203022005U CN 201220627348 CN201220627348U CN203022005U CN 203022005 U CN203022005 U CN 203022005U CN 201220627348 CN201220627348 CN 201220627348 CN 201220627348 U CN201220627348 U CN 201220627348U CN 203022005 U CN203022005 U CN 203022005U
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- Prior art keywords
- tidal flat
- foundation pit
- retaining
- deep foundation
- fill stratum
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- 230000001681 protective effect Effects 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004927 clay Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims description 28
- 230000004888 barrier function Effects 0.000 claims description 15
- 238000009412 basement excavation Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 abstract description 24
- 239000004568 cement Substances 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract 4
- 230000003204 osmotic effect Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005056 compaction Methods 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
- 230000007774 longterm Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 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
Images
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model provides a protective structure of a tidal flat reclamation district deep foundation pit retaining and protecting structure. The protective structure of the tidal flat reclamation district deep foundation pit retaining and protecting structure comprises a foundation pit (1) excavated in a tidal flat reclamation district, wherein a retaining and protecting structure (2) is arranged around the inside of the foundation pit (1), and an earthworks mixture fill stratum (4) is arranged on the upper portion of tidal flat claypan (3). The protective structure of the tidal flat reclamation district deep foundation pit retaining and protecting structure is characterized in that a water-resisting layer (4) made of clay materials (5) is arranged between the earthworks mixture fill stratum (4) and the retaining and protecting structure (2) and enabled the earthworks mixture fill stratum (4) and the retaining and protecting structure (2) to be blocked, and concrete pavements (6) are arranged on the surfaces of the earthworks mixture fill stratum (4) and the water-resisting layer (4). Local clay can be used, cost can not be increased, besides, low osmotic coefficients of the clay is utilized to prevent or slow down vadose water to infiltrate into the retaining and protecting structure (2), additional lateral pressure generated by the vadose water to the retaining and protecting structure (2) is reduced, and the retaining and protecting structure (2) is effectively protected. In addition, construction of the retaining and protecting structure (2) of cement mixing piles can be adopted conveniently.
Description
Technical field
The present invention relates to a kind of Tidal Flat Reclamation district deep foundation pit support, relate in particular to the safeguard structure of a kind of Tidal Flat Reclamation district deep foundation pit support.
Background technology
For guaranteeing the safety of Underground Construction and foundation ditch surrounding enviroment, need to be to gear, reinforcing and the safeguard measure of foundation pit side-wall and surrounding enviroment employing.Housing project is built, and often faces deep pit digging, and the computational methods of Base hole supporting technology structure are not yet completely unified at present, so 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 (supporting excavation is arranged) under the supporting and protection structure protection.The former not only simply but also economical, in the open territory or surrounding environment can guarantee the condition of stability of slope when allowing, should preferentially select.Excavation than deep foundation ditch has generally been selected supporting excavation, and 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 to determine supporting and protection structure.The common mode of pattern foundation pit supporting structure: sheet pile formula, colonnade formula, diaphragm wall, self-supporting cement retaining wall, SMW method, open caisson (case) method, the sheet pile formula is applicable to cohesive soil, sandy soil and grain through being not more than the sand cobble stratum of 100mm, during due to construction, Pile Driving Noise is large, should be used in the middle of the construction away from the residential block.Colonnade formula branch borehole castinplace pile and digging hole filling pile, construction noise is little, is suitable for the city construction.Diaphragm wall work construction method advantage: during construction, vibration is little, noise is low, and wall stiffness is large, and is little to peripheral ground 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), reaching 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), and they disclose various supporting and protection structure.
supporting construction for the Tidal Flat Reclamation district, special requirement are arranged, because the beach soil property is soft, need before construction to form at the certain thickness dregs of delaying of argillic horizon top laying the slag fill stratum of delaying, then carry out the construction of foundation ditch peripheral branch protection structure, supporting and protection structure can be to adopt the bored pile of cement mixing pile and the determining deviation Guan Liang that constructs again, at last on the surface of the slag fill stratum of delaying, concrete pavement is set, so just, can walk on concrete pavement and move various apparatuses, the void content of slag fill stratum of delaying as everyone knows is large, running in the precipitation situation, delay to have in the slag fill stratum and produce a lot of seepage waters, seepage water produces new pressurized energy to the top of supporting and protection structure, thereby unfavorable to supporting and protection structure, although supporting and protection structure has the sealing effect, but a large amount of seepage waters also can partly infiltrate or pour in foundation ditch by top.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of intercept or slow down the safeguard structure that seepage water invades the Tidal Flat Reclamation district 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 the technical scheme that adopts: the safeguard structure of a kind of Tidal Flat Reclamation district deep foundation pit support, be included in the foundation ditch that excavate out in the Tidal Flat Reclamation district, be provided with supporting around in foundation ditch, the top of the beach argillic horizon in the Tidal Flat Reclamation district is provided with the slag fill stratum of delaying, it is characterized in that: described delaying is provided with the water barrier of the clay material that both are blocked between slag fill stratum and supporting, described surface of delaying slag fill stratum and water barrier is 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 of pouring into foundation ditch from concrete pavement is like this discharged fast by the raceway groove that intercepts water, and reduces the lateral pressure to supporting.
On the above-mentioned slag fill stratum of delaying, excavation has a plurality of dewatering wells, the top of dewatering well to be provided with to extend upward the dewatering well flange of concrete pavement top.Dewatering well is set can makes and be penetrated into the slag fill stratum of delaying and concentrate to dewatering well, surpass the mobile degree of depth as the dewatering well internal water accumulation, we can extract the water in dewatering well out with water pump.
Above-mentioned dewatering well arranges one every 15～20 meters, and the degree of depth of dewatering well is greater than the thickness of the slag fill stratum of delaying.The spacing distance of this dewatering well can guarantee that each dewatering well is fully utilized, and also can not increase the increase that causes operating expenses because of the setting of too much dewatering well simultaneously.
The planar dimension of above-mentioned dewatering well is 0.8m*0.8m.
Compared with prior art; the utility model has the advantage of: it is provided with the water barrier of clay material with both blocking-up delaying between slag fill stratum and supporting; its medium clay soil can be gathered materials on the spot; can not increase cost; utilize in addition the hyposmosis coefficient of clay, can intercept or slow down seepage water and infiltrate to supporting from the slag fill stratum of delaying, reduce seepage water supporting is caused extra lateral pressure; effectively protection supporting also is convenient to adopt the construction of the supporting of cement mixing pile in addition.
Description of drawings
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 be complete the structural representation of safeguard structure after construction in steps.
The specific embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 3, be a preferred embodiment of the present invention.
The safeguard structure of a kind of Tidal Flat Reclamation district deep foundation pit support, include the foundation ditch 1 that excavates out in the Tidal Flat Reclamation district, be provided with supporting 2 around in foundation ditch, the top of the beach argillic horizon 3 in the Tidal Flat Reclamation district is provided with the slag fill stratum 4 of delaying, delaying is provided with the water barrier 5 of the clay material that both are 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 positions, water barrier 5 tops.
Delaying, excavation has a plurality of dewatering wells 8 on slag fill stratum 4, 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 the slag fill stratum of delaying, and the top of dewatering well 8 is provided with the dewatering well flange 81 that extends upward concrete pavement 6 tops.
It is provided with the water barrier of clay material with both blocking-up delaying between slag fill stratum and supporting; its medium clay soil can be gathered materials on the spot; can not increase cost; utilize in addition the hyposmosis coefficient of clay; can intercept or slow down seepage water infiltrates to supporting from the slag fill stratum of delaying; reduce seepage water supporting is caused extra lateral pressure, effectively protect supporting, also be convenient in addition to adopt the construction of the supporting of cement mixing pile.
The job practices of the safeguard structure of a kind of aforementioned Tidal Flat Reclamation district deep foundation pit support comprises following construction sequence:
Step 1 is laid with the dregs of delaying on beach argillic horizon 3 and is formed the certain thickness slag fill stratum 4 of delaying;
Above step 1,2 is with reference to shown in Figure 1.
Step 4 is carried out supporting construction and is formed supporting 2 on the foundation ditch sideline;
Step 5 is carried out foundation ditch 1 excavation, intersect simultaneously 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 bored pile facility of construction, a determining deviation of cement mixing pile facility and the construction of hat beam facility.
Claims (6)
1. the safeguard structure of a Tidal Flat Reclamation district deep foundation pit support, include the foundation ditch (1) that excavates out in the Tidal Flat Reclamation district, be provided with supporting (2) around in described foundation ditch, the top of the beach argillic horizon (3) in the Tidal Flat Reclamation district is provided with the slag fill stratum (4) of delaying, it is characterized in that: described delaying is provided with the water barrier (5) of the clay material that both are blocked between slag fill stratum (4) and supporting (2), described surface of delaying slag fill stratum (4) and water barrier (5) is provided with concrete pavement (6).
2. the safeguard structure of Tidal Flat Reclamation according to claim 1 district deep foundation pit support, it is characterized in that: the width (L) of described water barrier (5) is greater than 3 meters.
3. the safeguard structure of Tidal Flat Reclamation according to claim 1 district deep foundation pit support is characterized in that: contiguous supporting (2) position, described water barrier (5) the top excavation raceway groove (7) that intercepts water.
4. the safeguard structure of Tidal Flat Reclamation according to claim 1 district deep foundation pit support, it is characterized in that: the upper excavation of the described slag fill stratum (4) of delaying has a plurality of dewatering wells (8), the top of dewatering well (8) to be provided with to extend upward the dewatering well flange (81) of concrete pavement (6) top.
5. the safeguard structure of Tidal Flat Reclamation according to claim 4 district deep foundation pit support is characterized in that: described dewatering well (8) arranges one every 15～20 meters, and the degree of depth (H) of dewatering well (8) is greater than the thickness of the slag fill stratum of delaying.
6. the safeguard structure of Tidal Flat Reclamation according to claim 4 district deep foundation pit support, it is characterized in that: the planar dimension of described dewatering well (8) is 0.8m*0.8m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627348 CN203022005U (en) | 2012-11-22 | 2012-11-22 | Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627348 CN203022005U (en) | 2012-11-22 | 2012-11-22 | Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203022005U true CN203022005U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220627348 Expired - Lifetime CN203022005U (en) | 2012-11-22 | 2012-11-22 | Protective structure of tidal flat reclamation district deep foundation pit retaining and protecting structure |
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| CN (1) | CN203022005U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835296A (en) * | 2012-11-22 | 2014-06-04 | 浙江海洋学院 | Protective structure of deep foundation pit supporting in mud flat reclamation district and construction method thereof |
-
2012
- 2012-11-22 CN CN 201220627348 patent/CN203022005U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835296A (en) * | 2012-11-22 | 2014-06-04 | 浙江海洋学院 | Protective structure of deep foundation pit supporting in mud flat reclamation district and construction method thereof |
| CN103835296B (en) * | 2012-11-22 | 2015-10-28 | 浙江海洋学院 | The safeguard structure of polder area deep foundation pit support and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130626 Effective date of abandoning: 20151028 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |