CN105544576A - Foundation ditch dewatering and drainage excavation structure and application method - Google Patents
Foundation ditch dewatering and drainage excavation structure and application method Download PDFInfo
- Publication number
- CN105544576A CN105544576A CN201610036722.1A CN201610036722A CN105544576A CN 105544576 A CN105544576 A CN 105544576A CN 201610036722 A CN201610036722 A CN 201610036722A CN 105544576 A CN105544576 A CN 105544576A
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- foundation ditch
- excavation
- slope
- application process
- rainfall relation
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a foundation ditch dewatering and drainage excavation structure and an application method. The application method comprises the following steps of: (1) surveying and setting out the range of a foundation ditch to be excavated; (2) excavating the foundation ditch in a sloping supporting manner till reaching an elevation above an underground water level, and carrying out mutual overlap joint of cement-soil mixing piles along the periphery of the foundation ditch to form a waterproof curtain which stretches into a water-tight layer below a foundation base elevation; (3) continuously excavating the foundation ditch by regions in a sloping manner till reaching the foundation base elevation, carrying out dewatering and drainage during excavation, and spraying a concrete surface layer onto a slope surface below the underground water level after ending excavation. The application method has the beneficial effects that underground water outside the ditch is isolated from a working plane in the ditch in a construction process; well-point dewatering is not needed during construction; meanwhile, the simultaneous operation of earthwork construction and dewatering and drainage is ensured, thereby greatly improving the construction efficiency and ensuring the construction quality.
Description
Technical field
The present invention relates to base pit engineering field, be actually a kind of foundation ditch Yield rainfall relation excavation structure and application process.
Background technology
Along with the develop rapidly of building trade, the appearance of highrise building, most foundations is arranged on below groundwater table, if solve bad problem of groundwater, can make to descend swelling to enter in foundation ditch in large quantities and very burden is caused to construction, likely cause foundation ditch to ftracture caving in and the generation of the situation such as piping.In order to ensure carrying out normal conditions smoothly and the way of well-points dewatering being adopted water level to be dropped to below design substrate absolute altitude construct again of engineering.But there is following shortcoming in this method:
If when 1 stratum permeability is good, groundwater level depth is darker, and well-digging is drawn water smoothly, the comparatively even then convenient construction of the water yield; If stratum permeability is poor, groundwater level depth is more shallow, Yield rainfall relation work will be difficult to carry out;
2, Yield rainfall relation efficiency is lower, and the highrise building general duration is longer, and at least 1 year several years at most, this can cause the Yield rainfall relation operation duration cycle to increase, and produces the unnecessary wasting of resources;
3, long-term groundwater abstraction can take away silt around, and structure foundation space can be made to increase, and bearing capacity of foundation soil reduces, and causes Adjacent Buildings sedimentation, earth's surface strain cracking, causes serious consequence;
4, long-term groundwater abstraction causes water level skewness, the outer underground water of building is all evacuated, causes the waste of resource.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, providing a kind of foundation ditch Yield rainfall relation to excavate structure and application process, substantially increasing operating efficiency, ensure that construction quality.
The invention provides a kind of foundation ditch Yield rainfall relation excavation structure and application process, comprise the following steps:
(1), treat the scope of digging foundation ditch and carry out surveying setting-out;
(2), adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, mutually overlap formation water-stop curtain along foundation ditch surrounding construction cement mixing method, water-stop curtain extend into impervious layer under substrate absolute altitude;
(3), continue subregion put slope excavation pit to substrate absolute altitude, excavation carry out Yield rainfall relation simultaneously, excavation terminate with Caused by Sloping Surfaces, sprayed mortar surface layer is carried out to underground water level elevation.
Described a kind of foundation ditch Yield rainfall relation excavation method, further comprising the steps of:
(4), adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, water-stop curtain is formed along foundation ditch surrounding construction cement mixing method, be 60mm to putting domatic and slope jacking row sprayed mortar surface thickness, top, slope arranges dash platform and flows in hole to prevent cheating outer ground precipitation;
(5), subregion excavation pit to substrate absolute altitude, subregion excavation while excavate open drain in substrate;
(6), be excavated to along excavation gutter at the bottom of foundation ditch surrounding slope after substrate absolute altitude, and subsection setup sump.
The invention provides a kind of foundation ditch Yield rainfall relation excavation structure and application process, comprise water-stop curtain, dash platform, open drain, gutter and sump.
Further, described dash platform is arranged at outer 2m place, top, foundation ditch slope.
Further, described water-stop curtain overlaps 20cm mutually by cement mixing method, and water-stop curtain extend into impervious layer under substrate absolute altitude.
Further, described open drain is arranged at substrate surface, and with region excavation, subregion is arranged, described open drain criss-cross arrangement.
Further, described gutter is arranged at the bottom of foundation ditch surrounding slope, and subsection setup sump.
Further, the aproll gradient in described open drain and gutter is 0.2%.
Further, lay boulder bed in described sump, thickness is 20cm.
The invention provides a kind of foundation ditch Yield rainfall relation excavation structure and application process, adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, can reinforce domatic and slope jacking row putting domatic and slope jacking row sprayed mortar surface layer, top, slope arranges dash platform and can prevent cheating outer ground precipitation and flow in hole; Mutually overlap formation water-stop curtain along foundation ditch surrounding construction cement mixing method, under water-stop curtain extend into substrate absolute altitude, impervious layer can prevent in outer Groundwater infiltration hole, hole in groundwater table following soil excavation process.
Continue subregion and put slope to being excavated at the bottom of slope, in this process because water-stop curtain stretches in impervious layer, bottom whole foundation ditch and surrounding just define a closed construction, the main task of such foundation ditch Yield rainfall relation is exactly the underground water in foundation ditch in natural water and foundation ditch in the earthwork; Be excavated in each region substrate absolute altitude simultaneously in substrate excavation open drain, along excavation gutter at the bottom of foundation ditch surrounding slope, and subsection setup sump; The method adopting this subregion to excavate it also avoid the Yield rainfall relation that dig on a wide area causes makes hole internal water accumulation too much affect construction not in time; In Yield rainfall relation process, get up the water in foundation ditch through gutter flow to sump from convergence everywhere in open drain, in sump, arrange pumping equipment draw water, be provided with boulder bed in sump, can effectively prevent pumping equipment from blocking, greatly accelerate the efficiency of Yield rainfall relation.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of a kind of foundation ditch Yield rainfall relation excavation structure and application process.
Fig. 2 is a kind of foundation ditch Yield rainfall relation excavation structure and application process base plane figure.
Fig. 3 is a kind of foundation ditch Yield rainfall relation excavation structure and application process partial sectional view.
Fig. 4 is a kind of foundation ditch Yield rainfall relation excavation structure and application process water-stop curtain detail drawing.
In figure 1, water-stop curtain, 2, concrete pavement, 3, dash platform, 4, open drain, 5, gutter, 6, sump, 7, boulder bed.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As depicted in figs. 1 and 2, a kind of foundation ditch Yield rainfall relation excavation structure and application process, comprise the following steps:
(1), treat the scope of digging foundation ditch and carry out surveying setting-out;
(2), adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, mutually overlap form water-stop curtain 1 along foundation ditch surrounding construction cement mixing method, water-stop curtain 1 extend into impervious layer under substrate absolute altitude;
(3), continue subregion put slope excavation pit to substrate absolute altitude, excavation carry out Yield rainfall relation simultaneously, excavation terminate with Caused by Sloping Surfaces, sprayed mortar surface layer 2 is carried out to underground water level elevation.
Described a kind of foundation ditch Yield rainfall relation excavation structure and application process, further comprising the steps of:
(4), adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, water-stop curtain 1 is formed along foundation ditch surrounding construction cement mixing method, be 60mm to putting domatic and slope jacking row sprayed mortar surface layer 2 thickness, top, slope arranges dash platform 3 and flows in hole to prevent cheating outer ground precipitation;
(5), subregion excavation pit to substrate absolute altitude, subregion excavation while substrate excavation open drain 4;
(6), be excavated to along excavation gutter 5 at the bottom of foundation ditch surrounding slope after substrate absolute altitude, and subsection setup sump 6.
The invention provides a kind of foundation ditch Yield rainfall relation excavation structure and application process, comprise water-stop curtain 1, dash platform 3, open drain 4, gutter 5 and sump 6.
Further, described dash platform 3 is arranged at outer 2m place, top, foundation ditch slope.
Further, described water-stop curtain 1 overlaps 20cm mutually by cement mixing method, and water-stop curtain 1 extend into impervious layer under substrate absolute altitude.
Further, described open drain 4 is arranged at substrate surface, and with region excavation, subregion is arranged, described open drain 4 criss-cross arrangement.
Further, described gutter 5 is arranged at the bottom of foundation ditch surrounding slope, and subsection setup sump 6.
Further, described open drain 4 and the aproll gradient in gutter 5 are 0.2%.
Further, lay boulder bed 7 in described sump, thickness is 20cm.
The invention provides a kind of foundation ditch Yield rainfall relation excavation structure and application process, adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, can reinforce domatic and slope jacking row putting domatic and slope jacking row sprayed mortar surface layer 2, prevent the bursting of domatic slope bad, top, slope arranges dash platform 3 and can prevent from cheating in outer ground precipitation inflow hole; Mutually overlap along foundation ditch surrounding construction cement mixing method and form water-stop curtain 1, under water-stop curtain 1 extend into substrate absolute altitude, impervious layer can prevent in outer Groundwater infiltration hole, hole in groundwater table following soil excavation process.
Continue subregion and put slope to being excavated at the bottom of slope, in this process because water-stop curtain 1 stretches in impervious layer, bottom whole foundation ditch and surrounding just define a closed construction, the main task of such foundation ditch Yield rainfall relation is exactly the underground water in foundation ditch in natural water and foundation ditch in the earthwork; Be excavated in each region substrate absolute altitude simultaneously in substrate excavation open drain 4, along excavation gutter 5 at the bottom of foundation ditch surrounding slope, and subsection setup sump 6; The method adopting this subregion to excavate it also avoid the Yield rainfall relation that dig on a wide area causes makes hole internal water accumulation too much affect construction not in time; In Yield rainfall relation process, open drain 4 gets up to flow to sump 6 through gutter 5 from convergence everywhere the water in foundation ditch, in sump 6, arrange pumping equipment draw water, be provided with boulder bed 7 in sump 6, can effectively prevent pumping equipment from blocking, greatly accelerate the efficiency of Yield rainfall relation.
The above-mentioned a kind of foundation ditch Yield rainfall relation provided excavates structure and application process, and its advantage is:
1, the excavation method of this foundation ditch Yield rainfall relation implements easy structure simply, saves a series of expenses of foundation ditch well digging dewatering, uses manpower and material resources sparingly, carry out dewatering operation, greatly accelerate operating efficiency while foundation ditch sloping timbering;
2, outside basis, do not take out underground water, protect the balance of building area and periphery groundwater resources, realize sustainable development, reduce the possibility causing Adjacent Buildings sedimentation, earth's surface strain cracking causes serious consequence;
3, the cost-saving reduction of erection time, adopting Soil-cement pile water stopping curtain, open drain, gutter and sump, while excavation, carry out supporting and precipitation, carrying out than adopting well digging dewatering cost and the duration that pattern foundation pit supporting structure excavation saves about 50% again.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on manual, must determine its technical scope according to right.
Claims (9)
1. foundation ditch Yield rainfall relation excavation structure and an application process, it relates to building engineering field, comprises the following steps:
(1), treat the scope of digging foundation ditch and carry out surveying setting-out;
(2), adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, mutually overlap formation water-stop curtain along foundation ditch surrounding construction cement mixing method, water-stop curtain extend into impervious layer under substrate absolute altitude;
(3), continue subregion put slope excavation pit to substrate absolute altitude, excavation carry out Yield rainfall relation simultaneously, excavation terminate with Caused by Sloping Surfaces, sprayed mortar surface layer is carried out to underground water level elevation.
2. a kind of foundation ditch Yield rainfall relation excavation structure according to claim 1 and application process, is characterized in that:
(4), adopt the supporting method excavation pit putting slope to the above absolute altitude of groundwater table, water-stop curtain is formed along foundation ditch surrounding construction cement mixing method, be 60mm to putting domatic and slope jacking row sprayed mortar surface thickness, top, slope arranges dash platform and flows in hole to prevent cheating outer ground precipitation;
(5), subregion excavation pit to substrate absolute altitude, subregion excavation while excavate open drain in substrate;
(6), be excavated to along excavation gutter at the bottom of foundation ditch surrounding slope after substrate absolute altitude, and subsection setup sump.
3. foundation ditch Yield rainfall relation excavation structure and an application process, is characterized in that: comprise water-stop curtain, dash platform, open drain, gutter and sump.
4. foundation ditch Yield rainfall relation excavation structure according to claim 3 and application process, is characterized in that: described dash platform is arranged at outer 2m place, top, foundation ditch slope.
5. foundation ditch Yield rainfall relation according to claim 3 excavation structure and application process, is characterized in that: described water-stop curtain overlaps 20cm mutually by cement mixing method, and water-stop curtain extend into impervious layer under substrate absolute altitude.
6. foundation ditch Yield rainfall relation excavation structure according to claim 3 and application process, is characterized in that: described open drain is arranged at substrate surface, and with region excavation, subregion is arranged, described open drain criss-cross arrangement.
7. foundation ditch Yield rainfall relation excavation structure according to claim 3 and application process, is characterized in that: described gutter is arranged at the bottom of foundation ditch surrounding slope, and subsection setup sump.
8. the foundation ditch Yield rainfall relation excavation structure according to claim 5 and 6 and application process, is characterized in that: the aproll gradient in described open drain and gutter is 0.2%.
9. foundation ditch Yield rainfall relation excavation structure according to claim 7 and application process, is characterized in that: lay boulder bed in described sump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036722.1A CN105544576B (en) | 2016-01-20 | 2016-01-20 | A kind of foundation pit Yield rainfall relation excavation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610036722.1A CN105544576B (en) | 2016-01-20 | 2016-01-20 | A kind of foundation pit Yield rainfall relation excavation method |
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| CN105544576A true CN105544576A (en) | 2016-05-04 |
| CN105544576B CN105544576B (en) | 2018-06-08 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106245663A (en) * | 2016-08-26 | 2016-12-21 | 百色百矿发电有限公司 | A kind of make-up water pump house cofferdam preventing leaking water engineering construction method along the river |
| CN107700507A (en) * | 2017-10-11 | 2018-02-16 | 潍坊市市政工程股份有限公司 | Dewatering construction engineering method in steel plate pile water stopping curtain auxiliary tank |
| CN108005085A (en) * | 2017-12-04 | 2018-05-08 | 广东中南建设有限公司 | Foundation pit supporting construction and its construction method |
| CN109056765A (en) * | 2018-07-20 | 2018-12-21 | 广东建邦兴业集团有限公司 | A kind of foundation ditch construction method of anti-collapse flood bubble |
| CN109113076A (en) * | 2018-10-12 | 2019-01-01 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of sinking tunnel Support of Foundation Pit Excavation near a river and drop water-stopping method and its structure |
| CN110761308A (en) * | 2019-10-29 | 2020-02-07 | 北京崇建工程有限公司 | Local foundation pit construction method |
| CN113373950A (en) * | 2021-05-20 | 2021-09-10 | 杭州交投建设工程有限公司 | Chemically improved curtain and well point dewatering foundation pit water stop structure and construction method |
| CN113958363A (en) * | 2021-09-15 | 2022-01-21 | 中铁十九局集团矿业投资有限公司 | Inclined-base strip mine internal drainage method and construction method |
| CN117266207A (en) * | 2023-11-23 | 2023-12-22 | 北京建工集团有限责任公司 | Low-cost precipitation system of foundation pit small in scale and difficult to cause sedimentation |
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| CN105155550A (en) * | 2015-07-23 | 2015-12-16 | 甘肃第六建设集团股份有限公司 | Construction method for digging deep foundation pit in large-thickness highly weathered sandstone stratum in combined supporting mode |
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| CN1208801A (en) * | 1998-09-29 | 1999-02-24 | 李铁恒 | Cement and earth mixed pile for pore-filling and construction method therefor |
| KR100927186B1 (en) * | 2009-03-24 | 2009-11-18 | 이규철 | Method of constructing cantilevered continuous wallsfor retaining earth and cutting off water |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106245663A (en) * | 2016-08-26 | 2016-12-21 | 百色百矿发电有限公司 | A kind of make-up water pump house cofferdam preventing leaking water engineering construction method along the river |
| CN107700507A (en) * | 2017-10-11 | 2018-02-16 | 潍坊市市政工程股份有限公司 | Dewatering construction engineering method in steel plate pile water stopping curtain auxiliary tank |
| CN108005085A (en) * | 2017-12-04 | 2018-05-08 | 广东中南建设有限公司 | Foundation pit supporting construction and its construction method |
| CN109056765A (en) * | 2018-07-20 | 2018-12-21 | 广东建邦兴业集团有限公司 | A kind of foundation ditch construction method of anti-collapse flood bubble |
| CN109113076A (en) * | 2018-10-12 | 2019-01-01 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of sinking tunnel Support of Foundation Pit Excavation near a river and drop water-stopping method and its structure |
| CN110761308A (en) * | 2019-10-29 | 2020-02-07 | 北京崇建工程有限公司 | Local foundation pit construction method |
| CN113373950A (en) * | 2021-05-20 | 2021-09-10 | 杭州交投建设工程有限公司 | Chemically improved curtain and well point dewatering foundation pit water stop structure and construction method |
| CN113958363A (en) * | 2021-09-15 | 2022-01-21 | 中铁十九局集团矿业投资有限公司 | Inclined-base strip mine internal drainage method and construction method |
| CN113958363B (en) * | 2021-09-15 | 2023-09-29 | 中铁十九局集团矿业投资有限公司 | Inclined base strip mine inner drainage method and construction method |
| CN117266207A (en) * | 2023-11-23 | 2023-12-22 | 北京建工集团有限责任公司 | Low-cost precipitation system of foundation pit small in scale and difficult to cause sedimentation |
| CN117266207B (en) * | 2023-11-23 | 2024-02-09 | 北京建工集团有限责任公司 | Foundation pit dewatering system difficult to cause sedimentation |
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| Publication number | Publication date |
|---|---|
| CN105544576B (en) | 2018-06-08 |
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