CN103046565B - Draining method for ultra-deep batholith deep foundation pit - Google Patents
Draining method for ultra-deep batholith deep foundation pit Download PDFInfo
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- CN103046565B CN103046565B CN201110314521.0A CN201110314521A CN103046565B CN 103046565 B CN103046565 B CN 103046565B CN 201110314521 A CN201110314521 A CN 201110314521A CN 103046565 B CN103046565 B CN 103046565B
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Abstract
A draining method for an ultra-deep batholith deep foundation pit is used for structural construction of a hot rolling rotational flow pool inclined bottom plate located on a batholith. The draining method is characterized by comprising the following steps: arranging drain ditches to drain ground water; arranging drain pipes to drain side wall crack water; arranging a water-collecting well; installing a plastic film water-resisting layer; and installing a submersible pump to drain the ground water. The draining method for the ultra-deep batholith deep foundation pit has the advantages that the construction steps are designed reasonably and are easy to operate, the crack water of the batholith deep foundation pit is drained, and the method guarantees that a concrete cushion layer is free of water after cushion layer pouring, guarantees construction quality of an underground concrete structure and reduces engineering construction cost.
Description
Technical field
The present invention relates to a kind of foundation ditch Yield rainfall relation method of construction work underground structure, specifically, is a kind of ultra-deep batholith deep foundation ditch Yield rainfall relation method.
Background technology
Whether deep foundation ditch Yield rainfall relation mode is effectively proper, and be related to stable, the safety of Adjacent Buildings and the construction quality of underground structure of deep foundation ditch, current industry has had the construction technology of a set of maturation to the Yield rainfall relation of deep foundation pit of soft soil foundation.
Chinese patent CN102116033A discloses a kind of deep foundation ditch french drain collecting well Yield rainfall relation method and device on January 7th, 2011, comprising the ponding outside outer wall of basement to be concentrated the blind-ditch pipe flowing into basement bottom board bottom by catchwater, ponding in basement is concentrated through spilled water hole and is flowed into base plate bottom blind-ditch pipe, then cause interim collecting well through blind-ditch pipe, use water pump to arrange outward.
But this deep foundation ditch french drain collecting well Yield rainfall relation method is not suitable for the Yield rainfall relation construction of batholith deep foundation ditch.
In rock blasting, basement rock excavation and Underground Construction process, a large amount of crevice water is there is in basement rock weathering fissures, structural fracture and zone of fracture, a large amount of crevice water oozes out from crack of stone, these crevice waters are supplementary with earth's surface backwater and rainwater again, cause foundation ditch to catchment seriously, very large difficulty is caused to Underground Construction.How these crevice waters are carried out effective white-out, ensure underground concrete structure smooth construction, there is no mature experience can use for reference.
Summary of the invention
Object of the present invention, is that proposing underground water when a kind of underground water is constructed to Whirlwind tank structure base slab does not permeate more than bed course, does not bring the ultra-deep batholith deep foundation ditch Yield rainfall relation method of negative effect to the compactness of concrete floor.
Another object of the present invention, be propose a kind of safe and reliable, effective, can be similar engineering use for reference ultra-deep batholith deep foundation ditch Yield rainfall relation method.
For achieving the above object, technical solution of the present invention is:
A kind of ultra-deep batholith deep foundation ditch Yield rainfall relation method, for being seated in the hot rolling Whirlwind tank inclined bottom plate structure construction on batholith, is characterized in that comprising the following steps:
A, french drain white-out underground water is set
After Whirlwind tank earthwork evacuation, before building bed course, form drainage system, make on bed course without ponding, after earthwork evacuation to substrate, surrounding arranges french drain, change behind excavation gutter and fill out rubble, by clean for the body refuse complete liquidation of excavation french drain, make in french drain entirely for rubble is unimpeded by water;
B, gutter white-out sidewall crevice water is set
Before french drain changes and fills out rubble, embedded steel tube in french drain, and in the perforate of steel pipe surrounding, and pre-buried by the gradient of 5%, surrounding slope aspect collecting well, first padded part rubble before burying steel pipe, and then steel pipe is installed, then with rubble, steel pipe is embedded in french drain, the water of surrounding is drained to collecting well; Described Whirlwind tank bottom is the desk-top base plate of back taper, because groundwater table is higher, comparatively serious from crack of stone infiltration on slope, in order to avoid the water on slope flows on base plate, before closed bed course, first rubble loose on slope is cleaned out, and slot on the slope, the steel pipe of pre-buried ∮ 48, and be communicated with the DN125 steel pipe in french drain, the water on slope is enable to concentrate from steel pipe the pipe laying flowed into french drain, and with mortar by slope pipe laying shutoff;
C, collecting well is set
A collecting well is set in the bottom of foundation ditch and french drain through, collecting well adopts the steel plate that 10mm is thick to make, the steel pipe of ∮ 125 pre-buried for french drain is penetrated from collecting well side, underground water is drained to collecting well, and in the perforate of collecting well surrounding, be convenient to the inflow of catchmenting of base plate, and at collecting well top erection steel deck-plate, steel deck-plate adopts the steel plate that 10mm is thick to make, and put more energy into L50*5 angle steel, after processing factory makes, winch to foundation ditch with 16t crane, directly lay, and backfill the rubble of 10 ~ 50mm in the surrounding of collecting well;
D, installation plastic sheeting water barrier
After Whirlwind tank substrate french drain and slope pipe laying have been constructed, french drain is laid old template, before closed bed course, the thick plastic sheeting of 0.08mm is laid in substrate and surrounding skew wall, upper end compresses with the band steel with 25*3 bottom Whirlwind tank waist rail and is connected, and fix with expansion bolt, lower end is covered at the bottom of whole pond, and the water on such slope flows into collecting well after naturally just flowing directly into gutter;
Row's underground water falls in e, installing submersible pump
After substrate drainage system is formed, after water is drained to collecting well, installing submersible pump, weld with the delivery port of submersible pump with steel pipe, submersible pump directly bury with structure base slab below, water is directly evacuated to catch-basin, after drainage system installation, builds bottom cushion in time.
Ultra-deep batholith deep foundation ditch Yield rainfall relation method of the present invention can also be further achieved by the following technical measures.
Aforesaid method, in wherein said step a, sectional dimension 500x500mm in gutter.
Aforesaid method, in wherein said step b, in french drain, embedded steel tube is DN125 steel pipe, and on steel pipe, perforate size is 20mm.
Aforesaid method, in wherein said step c, collecting well is of a size of 1000x1000x1500mm.
Aforesaid method, in wherein said step e, the dredge pump of installing submersible pump 5 50m lifts, one of them bore is 100mm, all the other 4 bores are 50mm, be greater than 20cm from collecting well bottom level bottom submersible pump, opening two during normal construction, draw water can (arranging float valve), and all the other submersible pumps are as subsequent use.
After adopting technique scheme, ultra-deep batholith deep foundation ditch Yield rainfall relation method of the present invention has the following advantages:
1, construction sequence is reasonable in design, simple to operate;
2, get rid of the crevice water of basement rock deep foundation ditch, guarantee that bed course builds rear concrete mat surface without open fire;
3, ensure the construction quality of underground concrete structure, reduce Construction Cost.
Accompanying drawing explanation
Fig. 1 is the Whirlwind tank foundation ditch bottom discharge system architecture schematic diagram of the embodiment of the present invention;
Fig. 2 is the A-A sectional view in Fig. 1.
In figure: 1 structural cushion coat bottom surface, 2 slope sidewall steel pipes, 3 Whirlwind tanks, steel deck-plate on 4 collecting wells, 5 draining steel pipes, embedded steel tube in surrounding bed course bottom 6 Whirlwind tanks.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is illustrated further.
Embodiment 1
Now refer to Fig. 1 and Fig. 2, Fig. 1 is the Whirlwind tank foundation ditch bottom discharge system architecture schematic diagram of the embodiment of the present invention, and Fig. 2 is the A-A sectional view in Fig. 1.
Ultra-deep batholith deep foundation ditch Yield rainfall relation method of the present invention, for being seated in the hot rolling Whirlwind tank inclined bottom plate structure construction on batholith, is characterized in that comprising the following steps:
A, french drain white-out underground water is set
After Whirlwind tank earthwork evacuation, drainage system is formed before building bed course, make on bed course without ponding, after earthwork evacuation to substrate, surrounding arranges french drain, change behind the gutter of the interior sectional dimension 500x500mm of excavation and fill out rubble, the body refuse complete liquidation of excavation french drain completed, making complete in french drain is that rubble is unimpeded by water;
B, gutter white-out sidewall crevice water is set
Before french drain changes and fills out rubble, the steel pipe of pre-buried DN125 in french drain, in the perforate of steel pipe surrounding, on steel pipe, perforate size is 20mm, and pre-buried by the gradient of 5%, surrounding slope aspect collecting well, part rubble was first padded before burying steel pipe, and then steel pipe is installed, then with rubble, steel pipe is embedded in french drain, the water of surrounding is drained to collecting well; Described Whirlwind tank bottom is the desk-top base plate of back taper from-12.5 ~-18.6m, because groundwater table is higher, comparatively serious from crack of stone infiltration on slope, in order to avoid the water on slope flows on base plate, before closed bed course, first rubble loose on slope is cleaned out, and slot on the slope, the steel pipe of pre-buried ∮ 48, and be communicated with the DN125 steel pipe in french drain, the water on slope is enable to concentrate from steel pipe the pipe laying flowed into french drain, and with mortar by slope pipe laying shutoff;
C, collecting well is set
The collecting well and the french drain that arrange a 1000x1000x1500mm in the bottom of foundation ditch are through, collecting well adopts the steel plate that 10mm is thick to make, the steel pipe of ∮ 125 pre-buried for french drain is penetrated from collecting well side, underground water is drained to collecting well, and in the perforate of collecting well surrounding, be convenient to the inflow of catchmenting of base plate, and at collecting well top erection steel deck-plate, steel deck-plate adopts the steel plate that 10mm is thick to make, and put more energy into L50*5 angle steel, after processing factory makes, winch to foundation ditch with 16t crane, directly lay, and backfill the rubble of 10 ~ 50mm in the surrounding of collecting well;
D, installation plastic sheeting water barrier
After Whirlwind tank substrate french drain and slope pipe laying have been constructed, french drain is laid old template, before closed bed course, the thick plastic sheeting of 0.08mm is laid in substrate and surrounding skew wall, upper end compresses with the band steel with 25*3 bottom Whirlwind tank waist rail and is connected, and fix with expansion bolt, lower end is covered at the bottom of whole pond, and the water on such slope flows into collecting well after naturally just flowing directly into gutter;
Row's underground water falls in e, installing submersible pump
After substrate drainage system is formed, after water is drained to collecting well, install the dredge pump of 5 50m lifts, one of them bore is 100mm, all the other 4 bores are 50mm, be greater than 20cm from collecting well bottom level bottom water pump, opening two during normal construction, draw water can (arranging float valve), and all the other water pumps are as subsequent use, weld with the delivery port of water pump with steel pipe, water pump directly bury with structure base slab below, water is directly evacuated to catch-basin, after drainage system installation, builds bottom cushion in time.
Ultra-deep batholith deep foundation ditch Yield rainfall relation method of the present invention enterprising enforcements of Yantai Baosteel Tube hot rolling Whirlwind tank construction with and promote, all underground water is discharged in collecting well by submersible pump, and foundation ditch is interior without open fire, and dewatering effect is good.The Whirlwind tank inclined bottom plate concrete compaction constructed, leakproof phenomenon, for Whirlwind tank creates favourable condition along practice structure construction.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or change.Therefore, all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (5)
1. a ultra-deep batholith deep foundation ditch Yield rainfall relation method, for being seated in the hot rolling Whirlwind tank inclined bottom plate structure construction on batholith, is characterized in that comprising the following steps:
A, gutter white-out underground water is set
After Whirlwind tank earthwork evacuation, before building bed course, form drainage system, make on bed course without ponding, after earthwork evacuation to substrate, surrounding arranges gutter, change behind excavation gutter and fill out rubble, by clean for the body refuse complete liquidation in excavation gutter, making complete in gutter is that rubble is unimpeded by water;
B, gutter white-out sidewall crevice water is set
Before gutter is changed and is filled out rubble, embedded steel tube in gutter, and in the perforate of steel pipe surrounding, and it is pre-buried by the gradient of 5%, surrounding slope aspect collecting well, first padded part rubble, and then installs steel pipe before burying steel pipe, with rubble, steel pipe is embedded in gutter again, the water of surrounding is drained to collecting well; Described Whirlwind tank bottom is the desk-top base plate of back taper, because groundwater table is higher, comparatively serious from crack of stone infiltration on slope, in order to avoid the water on slope flows on base plate, before closed bed course, first rubble loose on slope is cleaned out, and slot on the slope, the steel pipe of pre-buried ∮ 48, and be communicated with the DN125 steel pipe in gutter, the water on slope is enable to concentrate from steel pipe the pipe laying flowed into gutter, and with mortar by slope pipe laying shutoff;
C, collecting well is set
A collecting well is set in the bottom of foundation ditch and gutter through, collecting well adopts the steel plate that 10mm is thick to make, the steel pipe of ∮ 125 pre-buried for gutter is penetrated from collecting well side, underground water is drained to collecting well, and in the perforate of collecting well surrounding, be convenient to the inflow of catchmenting of base plate, and at collecting well top erection steel deck-plate, steel deck-plate adopts the steel plate that 10mm is thick to make, and put more energy into L50*5 angle steel, after processing factory makes, winch to foundation ditch with 16t crane, directly lay, and backfill the rubble of 10 ~ 50mm in the surrounding of collecting well;
D, installation plastic sheeting water barrier
After Whirlwind tank substrate gutter and slope pipe laying have been constructed, gutter is laid old template, before closed bed course, the thick plastic sheeting of 0.08mm is laid in substrate and surrounding skew wall, upper end compresses with the band steel with 25*3 bottom Whirlwind tank waist rail and is connected, and fix with expansion bolt, lower end is covered at the bottom of whole pond, and the water on such slope flows into collecting well after naturally just flowing directly into gutter;
Row's underground water falls in e, installing submersible pump
After substrate drainage system is formed, after water is drained to collecting well, installing submersible pump, weld with the delivery port of submersible pump with the DN125 steel pipe in gutter, submersible pump directly bury with structure base slab below, water is directly evacuated to catch-basin, after drainage system installation, builds bottom cushion in time.
2. ultra-deep batholith deep foundation ditch Yield rainfall relation method as claimed in claim 1, is characterized in that, in described step a, and sectional dimension 500x500mm in gutter.
3. ultra-deep batholith deep foundation ditch Yield rainfall relation method as claimed in claim 1, it is characterized in that, in described step b, in gutter, embedded steel tube is DN125 steel pipe, and on steel pipe, perforate size is 20mm.
4. ultra-deep batholith deep foundation ditch Yield rainfall relation method as claimed in claim 1, it is characterized in that, in described step c, collecting well is of a size of 1000x1000x1500mm.
5. ultra-deep batholith deep foundation ditch Yield rainfall relation method as claimed in claim 1, is characterized in that, in described step e, the submersible pump of 5 50m lifts is installed, one of them bore is 100mm, and all the other 4 bores are 50mm, are greater than 20cm bottom submersible pump from collecting well bottom level.
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| CN103469799B (en) * | 2013-09-24 | 2015-09-09 | 中国建筑第二工程局有限公司 | The digging construction method of the following red mudstone soil elevator foundation pit of cold district groundwater table |
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| CN109183820A (en) * | 2018-11-03 | 2019-01-11 | 五冶集团上海有限公司 | A kind of whirling well cone bottom Yield rainfall relation method and its application |
| CN110424428B (en) * | 2019-07-30 | 2021-04-23 | 瑞洲建设集团有限公司 | Construction method of comprehensive dewatering and drainage system of deep foundation pit |
| CN110670613B (en) * | 2019-08-22 | 2024-03-19 | 北京东地岩土工程有限公司 | Foundation pit elevator shaft water seepage prevention structure and construction method thereof |
| CN110847199A (en) * | 2019-11-12 | 2020-02-28 | 中国二十冶集团有限公司 | Construction method for drainage of underground water of deep foundation pit |
| CN111877380A (en) * | 2020-06-28 | 2020-11-03 | 中国二十冶集团有限公司 | Drainage structure of cyclone tank open caisson |
| CN113463670A (en) * | 2021-09-02 | 2021-10-01 | 中铁十八局集团第五工程有限公司 | Water pumping and draining method and water pumping and draining structure for deep foundation pit bottom plate construction |
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