CN102787607B - A kind of deep foundation pit precipitation construction method for supporting being applicable to coastal area - Google Patents
A kind of deep foundation pit precipitation construction method for supporting being applicable to coastal area Download PDFInfo
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- CN102787607B CN102787607B CN201210309944.8A CN201210309944A CN102787607B CN 102787607 B CN102787607 B CN 102787607B CN 201210309944 A CN201210309944 A CN 201210309944A CN 102787607 B CN102787607 B CN 102787607B
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- foundation ditch
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Abstract
The invention discloses a kind of deep foundation pit precipitation construction method for supporting being applicable to coastal area, comprise the steps: to scrape out foundation ditch by predetermined space shape, and form support pile and water-stop curtain in this foundation ditch periphery；Steel plate water-stopping stake is set at described foundation ditch inwall, light well point is set between described steel plate water-stopping stake and support pile.Of the present invention be applicable to the deep foundation pit precipitation construction method for supporting of coastal area, according to the distribution situation that coastal area drifting sand layer and water barrier are staggered, Application of light well point precipitation and steel plate water-stopping stake are set targetedly so that the dewatering effect of deep basal pit is ensured；Further, the setting of steel plate water-stopping stake can block subsoil water and walk around the passage of water-stop curtain, and is prevented from piping and quicksand, it is ensured that the construction quality of the deep basal pit of coastal area.
Description
Technical field
The present invention relates to a kind of deep foundation pit precipitation construction method for supporting, particularly relate to one and be applicable to littoral
The deep foundation pit precipitation construction method for supporting in district.
Background technology
Along with expanding economy, each industrial and mining establishment constantly carry out economic expansion to coastal area, each enterprise
Resettlement, reconstruction etc. are made that indelible contribution to coastal economy circle.
In the resettlement, process of reconstruction of enterprise, coastal area is different from hinterland soil property gives construction band
Carry out no small difficulty.Owing to the underground mean water of coastal area is high, hydraulic pressure is big, subsoil water is the richest
Richness, and there is complex drifting sand layer and situation that water barrier is interspersed, therefore, the deep base i.e. having
Hole de-watering and shoring construction method is not particularly suited for these areas.
Summary of the invention
The present invention is directed to the drawback of prior art, it is provided that a kind of deep foundation pit precipitation being applicable to coastal area props up
Protect construction method.
The deep foundation pit precipitation construction method for supporting being applicable to coastal area of the present invention, including walking as follows
Rapid:
Step one, scrapes out foundation ditch by predetermined space shape, and forms support pile and sealing in this foundation ditch periphery
Curtain；
Step 2, arranges steel plate water-stopping stake at described foundation ditch inwall, in described steel plate water-stopping stake and supporting
Light well point is set between Zhuan.
Of the present invention be applicable to the deep foundation pit precipitation construction method for supporting of coastal area, described step
Farther include after two,
Step 3, the increase excavation pit hole end degree of depth is to preliminary dimension, and uses rubble to be backfilled to design mark
High and form metalling；Filter well is set in described metalling.
Of the present invention be applicable to the deep foundation pit precipitation construction method for supporting of coastal area, wrap further
Include following steps: form bank protection at described foundation ditch top.
It is of the present invention be applicable to the step one of the deep foundation pit precipitation construction method for supporting of coastal area,
Described support pile is double bored concrete pile；Wherein, a diameter of 700 millimeters of first row bored concrete pile, spacing is 1.1
Rice；A diameter of 1 meter of second row bored concrete pile, spacing is 1.5 meters.Further, in described first irrigation and drainage
Note stake arranges armored concrete straining beam, to form gate rigid frame with second row bored concrete pile top.
It is of the present invention be applicable to the step one of the deep foundation pit precipitation construction method for supporting of coastal area,
The occlusion of double cement earth pile is used to form described water-stop curtain.
It is of the present invention be applicable to the step 2 of the deep foundation pit precipitation construction method for supporting of coastal area,
Carry out outside described steel plate water-stopping stake unloading to prevent steel plate water-stopping stake from toppling.
It is of the present invention be applicable to the step 3 of the deep foundation pit precipitation construction method for supporting of coastal area,
Described filter well is bright row's precipitation.
Of the present invention be applicable to the deep foundation pit precipitation construction method for supporting of coastal area, according to coastal
The distribution situation that area drifting sand layer and water barrier interlock, arranges Application of light well point precipitation targetedly and steel plate stops
Water stake so that the dewatering effect of deep basal pit is ensured；Further, the setting of steel plate water-stopping stake can block
Subsoil water walks around the passage of water-stop curtain, and is prevented from piping and quicksand, it is ensured that coastal area deep
The construction quality of foundation ditch.
Accompanying drawing explanation
Fig. 1 is that the flow process of the deep foundation pit precipitation construction method for supporting being applicable to coastal area of the present invention is shown
It is intended to.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art's reference
Description word can be implemented according to this.
As it is shown in figure 1, the deep foundation pit precipitation construction method for supporting being applicable to coastal area of the present invention,
Comprise the steps:
Step 101, scrapes out foundation ditch by predetermined space shape, and forms support pile in this foundation ditch periphery and stop
Water curtain.
In this step, scrape out the foundation ditch of predetermined space shape according to actual demand and the construction standards of demanding party,
And support pile and water-stop curtain are set in this foundation ditch periphery.
The support pile that described foundation ditch periphery is arranged can be double bored concrete pile, and its construction technology is according to national standard
And carry out.The concrete size of this double bored concrete pile can adjust according to practice of construction demand, but should ensure that buried depth
The degree of depth, to guarantee having enough antidumping intensity, such as, makes a diameter of 700 millis of first row bored concrete pile
Rice, spacing is 1.1 meters；A diameter of 1 meter of second row bored concrete pile, spacing is 1.5 meters.Further, exist
Described first row bored concrete pile and second row bored concrete pile top arrange armored concrete straining beam, firm to form gate
Frame, to strengthen the supporting intensity of support pile.
Described water-stop curtain can use the occlusion of double cement earth pile to be formed, in view of the construction of this water-stop curtain
Technique has been maturation process, does not sew at this and chats.In practice of construction, deep-layer stirring mode can be used to increase
The intensity of strong water-stop curtain.
Step 102, arranges steel plate water-stopping stake at described foundation ditch inwall, described steel plate water-stopping stake with
Light well point is set between fender pile.
Owing to coastal area geology water content is in saturation, and owing to the distribution of water barrier makes soil layer
Water penetration extreme difference, according to conventional tube well dewatering, effect is the most undesirable.Although, have aforesaid stopping
Water curtain realizes the purpose blocked water, but, in view of the subsoil water of coastal area is extremely abundant, hydraulic pressure is high,
Therefore, subsoil water is entirely possible walks around water-stop curtain and penetrates into foundation ditch from the bottom of foundation ditch；Simultaneously for
For deep basal pit, the most easily there is piping and quicksand phenomenon.
To this end, in this step, be provided with the steel plate water-stopping with block-water effect at the inwall of described foundation ditch
Stake, makes this steel plate water-stopping stake block subsoil water and walks around the passage of water-stop curtain.The stake of described steel plate water-stopping stake
Long and stake top with and distance can adjust according to actual geological conditions.Inner side in this steel plate water-stopping stake
Carry out the vertical cut earthwork, meanwhile, in order to prevent steel plate water-stopping stake from toppling, preferably outside steel plate water-stopping stake
Side carries out the unloading of necessity.
For the special geologic condition of above-mentioned coastal area, in this step, additionally use light-duty node precipitation
Mode, the conventional tube well dewatering mode in inland will be improved to light-duty node dewatering mode.This light-duty node
Precipitation is to have pressure drop water, i.e. forces precipitation by pressure, is very suitable for the geological conditions of coastal area.
Described well depth and floral tube can adjust according to on-site actual situations, but should ensure that floral tube is under water barrier.
Need to process through sand prevention simultaneously at floral tube, with the upper husky amount reduced in Precipitation Process in well, make fall
Well carries out precipitation directly through water barrier.
Further, if still having subsoil water inside the foundation ditch of excavation, then following step can be passed through further
103 and carry out precipitation.
Step 103, the increase excavation pit hole end degree of depth is to preliminary dimension, and uses rubble to be backfilled to design
Absolute altitude and form metalling；Filter well is set in described metalling.
In this step, cutting depth at the bottom of the hole of foundation ditch is increased, and use rubble to backfill, be beneficial to
Filter well is set and carries out bright row's precipitation.Such as, cutting depth at the bottom of the hole of foundation ditch is increased by 500 millimeters, then makes
It is backfilled to designed elevation with rubble and forms metalling, this metalling arranges filter well at predetermined intervals
Carry out bright row's precipitation, so that it is guaranteed that the dewatering effect of deep basal pit.
Further, bank protection can also be formed at the top of foundation ditch according to national standard.
Of the present invention be applicable to the deep foundation pit precipitation construction method for supporting of coastal area, according to coastal
The distribution situation that area drifting sand layer and water barrier interlock, arranges Application of light well point precipitation targetedly and steel plate stops
Water stake so that the dewatering effect of deep basal pit is ensured；Further, the setting of steel plate water-stopping stake can block
Subsoil water walks around the passage of water-stop curtain, and is prevented from piping and quicksand, it is ensured that coastal area deep
The construction quality of foundation ditch.
Although embodiment of the present invention are disclosed as above, but it is not restricted to description and embodiment party
Listed utilization in formula, it can be applied to various applicable the field of the invention completely, for being familiar with ability
For the personnel in territory, be easily achieved other amendment, therefore without departing substantially from claim and etc. homotype
Enclosing under limited general concept, the present invention is not limited to specific details and shown here as the figure with description
Example.
Claims (1)
1. the deep foundation pit precipitation construction method for supporting being applicable to coastal area, it is characterised in that step
Including:
Step one, scrapes out foundation ditch by predetermined space shape, and forms support pile and sealing in this foundation ditch periphery
Curtain；Described support pile is double bored concrete pile；Wherein, a diameter of 700 millimeters of first row bored concrete pile,
Away from for 1.1 meters；A diameter of 1 meter of second row bored concrete pile, spacing is 1.5 meters；Double cement earth pile is used to sting
Close and form described water-stop curtain；At described first row bored concrete pile and second row bored concrete pile top, reinforcing bar is set
Concrete straining beam, to form gate rigid frame；
Step 2, arranges steel plate water-stopping stake at described foundation ditch inwall, in described steel plate water-stopping stake and supporting
Light well point is set between Zhuan；Carry out outside described steel plate water-stopping stake unloading to prevent steel plate water-stopping stake from toppling；
Step 3, the increase excavation pit hole end degree of depth is to preliminary dimension, and uses rubble to be backfilled to design mark
High and form metalling；Arranging filter well in described metalling, described filter well is bright row's precipitation；
Bank protection is formed at described foundation ditch top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210309944.8A CN102787607B (en) | 2012-08-28 | 2012-08-28 | A kind of deep foundation pit precipitation construction method for supporting being applicable to coastal area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309944.8A CN102787607B (en) | 2012-08-28 | 2012-08-28 | A kind of deep foundation pit precipitation construction method for supporting being applicable to coastal area |
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| CN102787607A CN102787607A (en) | 2012-11-21 |
| CN102787607B true CN102787607B (en) | 2016-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120828A (en) * | 2016-06-23 | 2016-11-16 | 程华清 | A kind of Sandwich biscuit type curtain water stop construction method of diaphragm wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114599B (en) * | 2013-03-04 | 2016-05-18 | 济南城建集团有限公司 | Deep basal pit sealing dewatering device and construction method thereof |
| CN103726495B (en) * | 2014-01-10 | 2016-01-13 | 上海建工五建集团有限公司 | Coastal waters deep foundation pit supporting structure and construction method thereof |
| CN104294806B (en) * | 2014-09-18 | 2017-01-11 | 中铁十二局集团有限公司 | Excavation, diversion and drainage method for inter-pile water above water-resisting layer of deep foundation pit |
| CN104975607A (en) * | 2015-07-22 | 2015-10-14 | 中建八局第二建设有限公司 | Offshore area local deep foundation pit stanching pit construction method |
| CN106284387B (en) * | 2016-08-11 | 2018-12-18 | 中国建筑第八工程局有限公司 | Steel sheet pile precipitation well construction |
| CN112030935A (en) * | 2020-08-31 | 2020-12-04 | 广东劲拓建设工程有限公司 | Method for treating piping of deep foundation pit |
| CN113356229A (en) * | 2021-06-21 | 2021-09-07 | 中铁十二局集团有限公司 | Safe and efficient comprehensive construction method for garage under high-speed railway base |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2190725C1 (en) * | 2001-11-20 | 2002-10-10 | Общество с ограниченной ответственностью "Трансстройтоннель-99" | Method for construction of foundation pit |
| CN1296571C (en) * | 2004-04-09 | 2007-01-24 | 南京大学 | Method for supporting foundation trench for agitation piles of soil cement with concrete as the core |
| CN102011404B (en) * | 2010-11-24 | 2012-07-04 | 温州中城建设集团有限公司 | Pit supporting structure and construction method thereof |
| CN102140798A (en) * | 2011-01-28 | 2011-08-03 | 东南大学 | Steel sheet pile and tubular pile combined base pit supporting structure and supporting method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120828A (en) * | 2016-06-23 | 2016-11-16 | 程华清 | A kind of Sandwich biscuit type curtain water stop construction method of diaphragm wall |
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| CN102787607A (en) | 2012-11-21 |
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