CN103485358B - The construction method of underground structure precipitation open caisson - Google Patents
The construction method of underground structure precipitation open caisson Download PDFInfo
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- CN103485358B CN103485358B CN201310380958.3A CN201310380958A CN103485358B CN 103485358 B CN103485358 B CN 103485358B CN 201310380958 A CN201310380958 A CN 201310380958A CN 103485358 B CN103485358 B CN 103485358B
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- precipitation
- steel pipe
- open caisson
- well
- construction method
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- 238000001556 precipitation Methods 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000004575 stone Substances 0.000 claims abstract description 14
- 239000011449 brick Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000007799 cork Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses the construction method of underground structure precipitation open caisson, comprise the following steps: make open caisson well dish and precipitation steel pipe, the uniform infiltration through hole in precipitation steel pipe lower end is outside filter screen wrapped multiple also; Lay wooden well dish and build open caisson by laying bricks or stones at Jing Panshang; Well sinking is to desired depth; Put into precipitation steel pipe and fill up with rubble; Draw water from precipitation steel pipe until complete base arrangement; Well casing shutoff.Structure of the present invention is simple, constructs easily, quick construction, with low cost, respond well.
Description
Technical field
The present invention relates to a kind of construction method of underground structure precipitation open caisson.
Background technology
The design of highrise building underground structure often has elevator pit or collecting well, its degree of depth all can exceed nearly 2 meters of absolute altitude at the bottom of normal configuration, and Underground Construction usually needs to reduce underground water, in construction, owner is in order to reduce precipitation cost, when quantity and the depth design of dewatering well usually according to normal configuration bed course at the bottom of absolute altitude (structure centre position) 0.5 meter-1 meter downwards, whole precipitation event is that foundation ditch surrounding reduces the highest ramp shaped that presents in the minimum centre of water level, because elevator shaft and collecting well are often many in the middle part of underground structure, therefore need to take auxiliary precipitation just to seem economical lower than the elevator pit of this part or collecting well.And this part due to precipitation not in place and after earth excavation water can form spring or there is spring at this position itself in this segment set, the auxiliary improper meeting of precipitation method causes this position dewatering effect difference and occurs that the earthwork is caved in, and then affect this position normal construction, affect duration, quality and safety, and construction cost is very high.
Normal practice:
1, heavy caliber dewatering well is increased at this position: equipment difficulty is in place, long in time limit, and cost is high;
2, adopt Application of light well point precipitation: cost is high, long in time limit, hinder structure construction;
3, cement mixing pile is adopted to block water: construction equipment is difficult to enter, and cost is high, long in time limit.
Simple and easy way: we invent a kind of simple and easy open caisson construction method, namely artificial simple and easy open caisson is done at elevator pit or sump bed course (comprising structure to need to make slope) outer correct position, special steel pipe is put in well, submersible pump precipitation in steel pipe meets construction requirement: well depth as required precipitation depth and transmission coefficient and precipitation range computation is determined, a general open caisson just can meet, and special circumstances are accelerated.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of construction method of underground structure precipitation open caisson.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the construction method of underground structure precipitation open caisson, comprises the following steps:
(1) precipitation steel pipe is made, the length of precipitation steel pipe is by the dewatering well degree of depth and structure base slab thickness and stretch out base arrangement face 100mm and calculate, the uniform water seepage hole in precipitation steel pipe lower end, outside screen pack wrapped multiple, is welded with two road seal rings on the top of precipitation steel pipe;
(2) annular wells dish is made with plank;
(3) annular wells dish is laid to the center pre-determining dewatering well;
(4) the annularly well dish J-shaped wall of standard common brick laid dry thickness 240mm, adds iron wire at vertical direction stretcher wall several piece plank when often building 1 meter high by laying bricks or stones and reinforces tighten along outer ring;
(5) manually to dredge a well clearly open caisson one piece of integral sinking that interior sand or soil allows annular wells dish and brick wall form, reduce shoveling difficulty with giant punching soil if desired, or suitably add load and accelerate;
(6) sink while upwards add block header wall, until open caisson reaches desired depth, whole in frustum of a cone after open caisson completes;
(7) put 200mm thick 1-3 level stone in shaft bottom, put into the precipitation steel pipe made above, outside steel pipe, surrounding throws in elevation location at the bottom of 1-3 level stone to bed course;
(8) muddy water in precipitation steel pipe is taken out with foul water pump until be all clear water and not containing silt stone, change submersible pump and carry out continuous pumpage dewatering;
(9) precipitation should carry out continuously, determines whether continue precipitation after base arrangement concrete completes as required, causing ground influenced, being also used as maintenance water and retaining a period of time if do not taken silt out of;
(10) after Underground Construction completes, well casing shutoff is carried out after reaching design strength; Well casing shutoff comprises the following steps:
(11) along precipitation steel pipe base arrangement concrete pavement dug out circular groove in advance and clean up;
(12) accelerate to draw water reduction underground water;
(13) fast hardening concrete quick closure is used lower than blinding concrete absolute altitude 200mm with lower part steel pipe;
(14) immediately by the 200mm height steel duct below the downward jam-pack blinding concrete of cork made in advance, with 50mm position below the precipitation steel pipe on the fast hardening concrete quick closure blinding concrete of band microdilatancy to base arrangement surface layer, top is closed by the steel plate rapid welding that thickness 16mm, diameter equal pipe diameter immediately, then slices off the steel pipe of the bottom 130mm exceeding artificial raggle on base plate; Slice off steel pipe for convenience, the depth of groove that artificial raggle bottom steel pipe is formed is 30mm, groove diameter is that outer diameter of steel pipes adds the distance 100mm being convenient to cut off construction, after slicing off steel pipe, finally build groove and base arrangement face put down with carrying higher leveled microdilatancy pea gravel concreten than base arrangement concrete strength again.
As preferably, the thickness making annular wells dish plank in step (2) is not less than 35mm.
As preferably, in step (6), the back cut diameter of open caisson is not less than 600mm, and lower port diameter is 900mm.
As preferably, the wide 50mm of circular groove, dark 30mm in step (11).
As preferably, in step (14), cork thickness is 200mm.
The invention has the beneficial effects as follows:
Structure is simple, constructs easily, quick construction, with low cost, respond well.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation of the construction method embodiment of underground structure precipitation open caisson of the present invention.
In figure, 1-well dish, 2-brick wall, 3-screen pack, 4-water seepage hole, 5-stone, 6-precipitation steel pipe, 7-cork, 8-blinding concrete, 9-underplate concrete, 10-seal ring, 11-closes steel plate, 12-confining bed.
Detailed description of the invention
Fig. 1 is a kind of underground structure precipitation open caisson, and its construction method comprises the following steps:
(1) precipitation steel pipe 6 is made, the length of precipitation steel pipe is by the dewatering well degree of depth and structure base slab thickness and stretch out base arrangement face 100mm and calculate, the uniform water seepage hole 4 in precipitation steel pipe lower end, outside screen pack 3 wraps up plural layer, is welded with two road seal rings 10 on the top of precipitation steel pipe;
(2) the plank making annular wells dish 1 of 35mm is not less than with thickness;
(3) annular wells dish is laid to the center pre-determining dewatering well;
(4) the T-shaped brick wall 2 of annularly well dish standard common brick laid dry thickness 240mm, adds iron wire at vertical direction stretcher wall several piece plank when often building 1 meter high by laying bricks or stones and reinforces tighten along outer ring;
(5) manually to dredge a well clearly open caisson one piece of integral sinking that interior sand or soil allows annular wells dish and brick wall form, reduce shoveling difficulty with giant punching soil if desired, also suitably can add load and accelerate;
(6) sink while upwards add block J-shaped wall, until open caisson reaches desired depth, whole in frustum of a cone after open caisson completes, back cut diameter is not less than 600mm, and lower port diameter is 900mm;
(7) put 200mm thick 1-3 level stone in shaft bottom, put into the precipitation steel pipe 6 made above, outside steel pipe, surrounding throws in elevation location at the bottom of 1 ~ 3 grade of stone 5 to bed course;
(8) muddy water in precipitation steel pipe is taken out with foul water pump until be all clear water and not containing silt stone, change submersible pump and carry out continuous pumpage dewatering;
(9) precipitation should carry out continuously, determines whether continue precipitation after underplate concrete 9 completes as required, causing ground influenced, can also be used as maintenance water and retaining a period of time if do not taken silt out of;
(10) can carry out well casing shutoff after Underground Construction completes and after reaching design strength, well casing shutoff comprises the following steps:
(11) along precipitation steel pipe, the circular groove of the wide 50mm of base arrangement concrete pavement artificial chisel, dark 30mm is cleaned up in advance;
(12) accelerate to draw water reduction underground water;
(13) fast hardening concrete quick closure is used lower than blinding concrete absolute altitude 200mm with lower part steel pipe;
(14) immediately by the 200mm height steel duct below the downward jam-pack of cork (thickness 200) blinding concrete made in advance, with 50mm position below the precipitation steel pipe on the fast hardening concrete quick closure blinding concrete of band microdilatancy to base arrangement surface layer, top is closed by the steel plate rapid welding that thickness 16mm, diameter equal pipe diameter immediately, then slices off the steel pipe exceeding base plate (bottom of artificial raggle) 130mm; Slice off steel pipe for convenience, the depth of groove that artificial raggle bottom steel pipe is formed is 30mm, groove diameter is that outer diameter of steel pipes adds the distance 100mm being convenient to cut off construction, after slicing off steel pipe, finally build groove and base arrangement face put down with carrying higher leveled microdilatancy pea gravel concreten than base arrangement concrete strength again.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (5)
1. the construction method of underground structure precipitation open caisson, is characterized in that comprising the following steps:
(1) precipitation steel pipe is made, the length of precipitation steel pipe is by the dewatering well degree of depth and structure base slab thickness and stretch out base arrangement face 100mm and calculate, the uniform water seepage hole in precipitation steel pipe lower end, outside screen pack wrapped multiple, is welded with two road seal rings on the top of precipitation steel pipe;
(2) annular wells dish is made with plank;
(3) annular wells dish is laid to the center pre-determining dewatering well;
(4) the annularly well dish J-shaped wall of standard common brick laid dry thickness 240mm, adds iron wire at vertical direction stretcher wall several piece plank when often building 1 meter high by laying bricks or stones and reinforces tighten along outer ring;
(5) manually to dredge a well clearly open caisson one piece of integral sinking that interior sand or soil allows annular wells dish and brick wall form, reduce shoveling difficulty with giant punching soil if desired, or suitably add load and accelerate;
(6) sink while upwards add block J-shaped wall, until open caisson reaches desired depth, whole in frustum of a cone after open caisson completes;
(7) put 200mm thick 1-3 level stone in shaft bottom, put into the precipitation steel pipe made above, outside steel pipe, surrounding throws in elevation location at the bottom of 1-3 level stone to bed course;
(8) muddy water in precipitation steel pipe is taken out with foul water pump until be all clear water and not containing silt stone, change submersible pump and carry out continuous pumpage dewatering;
(9) precipitation should carry out continuously, determines whether continue precipitation after base arrangement concrete completes as required, causing ground influenced, being also used as maintenance water and retaining a period of time if do not taken silt out of;
(10) after Underground Construction completes, well casing shutoff is carried out after reaching design strength; Described well casing shutoff comprises the following steps:
(11) along precipitation steel pipe base arrangement concrete pavement dug out circular groove in advance and clean up;
(12) accelerate to draw water reduction underground water;
(13) fast hardening concrete quick closure is used lower than blinding concrete absolute altitude 200mm with lower part steel pipe;
(14) immediately by the 200mm height steel duct below the downward jam-pack blinding concrete of cork made in advance, with 50mm position below the precipitation steel pipe on the fast hardening concrete quick closure blinding concrete of band microdilatancy to base arrangement surface layer, top is closed by the steel plate rapid welding that thickness 16mm, diameter equal pipe diameter immediately, then slices off the steel pipe of the bottom 130mm exceeding artificial raggle on base plate; Slice off steel pipe for convenience, the depth of groove that artificial raggle bottom steel pipe is formed is 30mm, groove diameter is that outer diameter of steel pipes adds the distance 100mm being convenient to cut off construction, after slicing off steel pipe, finally build groove and base arrangement face put down with carrying higher leveled microdilatancy pea gravel concreten than base arrangement concrete strength again.
2. the construction method of underground structure precipitation open caisson according to claim 1, is characterized in that: the thickness making annular wells dish plank in step (2) is not less than 35mm.
3. the construction method of underground structure precipitation open caisson according to claim 1, is characterized in that: in step (6), the back cut diameter of open caisson is not less than 600mm, and lower port diameter is 900mm.
4. the construction method of underground structure precipitation open caisson according to claim 1, is characterized in that: the wide 50mm of circular groove, dark 30mm in step (11).
5. the construction method of underground structure precipitation open caisson according to claim 1, is characterized in that: in step (14), cork thickness is 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310380958.3A CN103485358B (en) | 2013-08-28 | 2013-08-28 | The construction method of underground structure precipitation open caisson |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310380958.3A CN103485358B (en) | 2013-08-28 | 2013-08-28 | The construction method of underground structure precipitation open caisson |
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| CN103485358A CN103485358A (en) | 2014-01-01 |
| CN103485358B true CN103485358B (en) | 2016-02-24 |
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| CN201310380958.3A Expired - Fee Related CN103485358B (en) | 2013-08-28 | 2013-08-28 | The construction method of underground structure precipitation open caisson |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105133628B (en) * | 2015-09-14 | 2017-05-24 | 中国建筑第二工程局有限公司 | Under-pressure leaking stoppage structure and method for underground garage sump |
| CN105350553A (en) * | 2015-09-25 | 2016-02-24 | 中国二十冶集团有限公司 | Dewatering tube well for foundation pit construction with cover-excavation method and foundation pit construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087679A (en) * | 1998-09-10 | 2000-03-28 | Kato Kensetsu:Kk | Underground structure, and its constructing method |
| CN2644525Y (en) * | 2003-09-19 | 2004-09-29 | 盛爱华 | Seepage control sunk well |
| JP4232263B2 (en) * | 1999-03-19 | 2009-03-04 | 株式会社大林組 | Construction method for underwater foundation |
| CN101787703A (en) * | 2010-03-17 | 2010-07-28 | 中国二十二冶集团有限公司 | Sinking construction method of sinking well with geology of gravel and pebble beds under saturated water condition |
| CN102454167A (en) * | 2010-10-21 | 2012-05-16 | 五冶集团上海有限公司 | Construction method for large ultra-deep well |
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2013
- 2013-08-28 CN CN201310380958.3A patent/CN103485358B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087679A (en) * | 1998-09-10 | 2000-03-28 | Kato Kensetsu:Kk | Underground structure, and its constructing method |
| JP4232263B2 (en) * | 1999-03-19 | 2009-03-04 | 株式会社大林組 | Construction method for underwater foundation |
| CN2644525Y (en) * | 2003-09-19 | 2004-09-29 | 盛爱华 | Seepage control sunk well |
| CN101787703A (en) * | 2010-03-17 | 2010-07-28 | 中国二十二冶集团有限公司 | Sinking construction method of sinking well with geology of gravel and pebble beds under saturated water condition |
| CN102454167A (en) * | 2010-10-21 | 2012-05-16 | 五冶集团上海有限公司 | Construction method for large ultra-deep well |
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| CN103485358A (en) | 2014-01-01 |
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Granted publication date: 20160224 |