CN103046565A - 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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- CN103046565A CN103046565A CN2011103145210A CN201110314521A CN103046565A CN 103046565 A CN103046565 A CN 103046565A CN 2011103145210 A CN2011103145210 A CN 2011103145210A CN 201110314521 A CN201110314521 A CN 201110314521A CN 103046565 A CN103046565 A CN 103046565A
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- french drain
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- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000010276 construction Methods 0.000 claims abstract description 20
- 239000003673 groundwater Substances 0.000 claims abstract description 5
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 59
- 239000010959 steel Substances 0.000 claims description 59
- 239000000758 substrate Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000012467 final product Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 abstract 1
- 229920006255 plastic film Polymers 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 4
- 239000003643 water by type Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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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 blind 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
Water discharge method falls in the foundation ditch that the present invention relates to a kind of construction work underground structure, specifically, is that water discharge method falls in a kind of super dark batholith deep foundation ditch.
Background technology
Deep foundation ditch falls that drainage pattern is whether proper effectively to be related to stable, the safety of Adjacent Buildings of deep foundation ditch and the construction quality of underground structure, and industry has had the ripe construction technology of a cover to the draining of falling of deep foundation pit of soft soil foundation at present.
Chinese patent CN102116033A discloses a kind of deep foundation ditch french drain collecting well on January 7th, 2011 and has fallen water discharge method and device, comprising the ponding in the outer wall of basement outside is concentrated the blind-ditch pipe that flows into the basement bottom board bottom by catchwater, ponding in the 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 efflux.
Yet the drainage construction that falls that water discharge method is not suitable for the batholith deep foundation ditch falls in this deep foundation ditch french drain collecting well.
In rock blasting, basement rock excavation and Underground Construction process, exist a large amount of crevice water in basement rock weathering fissures, structural fracture and the zone of fracture, a large amount of crevice waters ooze out from crack of stone, these crevice waters are again take earth's surface backwater and rainwater as replenishing, cause foundation ditch to catchment seriously, underground structure construction has been caused very large difficulty.How these crevice waters are carried out effective white-out, ensure the underground concrete structure smooth construction, there is no mature experience can use for reference.
Summary of the invention
Purpose of the present invention, underground water does not permeate more than the bed course when being to propose a kind of underground water the Whirlwind tank structure base slab being constructed, and does not bring the super dark batholith deep foundation ditch of negative effect to fall water discharge method to the compactness of concrete floor.
Another object of the present invention is to propose a kind of super dark batholith deep foundation ditch safe and reliable, effective, that can be the similar engineering reference and falls water discharge method.
For achieving the above object, technical solution of the present invention is:
Water discharge method falls in a kind of super dark batholith deep foundation ditch, is used for being seated in the hot rolling Whirlwind tank inclined bottom plate structure construction on the batholith, it is characterized in that may further comprise the steps:
A, french drain white-out underground water is set
After the Whirlwind tank earthwork evacuation is complete, before building bed course, form drainage system, make on the bed course without ponding, earthwork evacuation arranges french drain all around to substrate, change behind the excavation gutter and fill out rubble, the body refuse complete liquidation of excavation french drain is clean, and making complete in the french drain is that rubble is unimpeded by water;
B, gutter white-out sidewall crevice water is set
French drain change fill out rubble before, embedded steel tube in french drain, and perforate around the steel pipe, and pre-buried by 5% the gradient, the slope aspect collecting well filled up first the part rubble before burying steel pipe all around, and then the installation steel pipe, with rubble steel pipe is embedded in the french drain again, with around the water drainage to collecting well; Described Whirlwind tank bottom is the desk-top base plate of back taper, because groundwater table is higher, comparatively serious from the crack of stone infiltration on the slope, the water on the slope flows on the base plate, before the sealing bed course, first rubble loose on the slope is cleaned out, and fluting on the slope, the steel pipe of pre-buried ∮ 48, and be communicated with DN125 steel pipe in the french drain, make the water on the slope concentrate flow into pipe laying the french drain from steel pipe, and with mortar with slope pipe laying shutoff;
C, collecting well is set
A collecting well and french drain are set in the bottom of foundation ditch to be connected, collecting well adopts the thick steel plate of 10mm to make, the steel pipe of the ∮ 125 that french drain is pre-buried penetrates from the collecting well side, with the underground water drainage to collecting well, and perforate around collecting well, be convenient to the inflow of catchmenting of base plate, and set up steel deck-plate on collecting well top, steel deck-plate adopts the thick steel plate of 10mm to make, and put more energy into the L50*5 angle steel, after processing factory makes, winch to foundation ditch with the 16t crane, directly lay, and around collecting well the rubble of backfill 10～50mm;
D, installation plastic sheeting water barrier
After Whirlwind tank substrate french drain and slope pipe laying have been constructed, lay old template at french drain, before the sealing bed course, skew wall is laid the thick plastic sheeting of 0.08mm around substrate reaches, the upper end is connected with the band steel compression of Whirlwind tank waist rail bottom with 25*3, and fix with expansion bolt, the lower end is covered at the bottom of the whole pond, and the water on the slope flows into collecting well after naturally just flowing directly into the gutter like this;
Row's underground water falls in e, installing submersible pump
After the substrate drainage system forms, with the water drainage to collecting well, installing submersible pump, delivery port welding with steel pipe and submersible pump, submersible pump directly buries with below the structure base slab, water directly is evacuated to catch-basin gets final product, and in time builds bottom cushion after the drainage system installation.
Super dark batholith deep foundation ditch of the present invention falls water discharge method and can also be further achieved by the following technical measures.
Aforesaid method, among the wherein said step a, sectional dimension 500x500mm in the gutter.
Aforesaid method, among the wherein said step b, embedded steel tube is the DN125 steel pipe in french drain, and the perforate size is 20mm on the steel pipe.
Aforesaid method, among the wherein said step c, collecting well is of a size of 1000x1000x1500mm.
Aforesaid method, among the wherein said step e, the dredge pump of 5 50m lifts of installing submersible pump, one of them bore is 100mm, all the other 4 bores are 50mm, submersible pump bottom, is left two and is drawn water and get final product (float valve is set) greater than 20cm from the collecting well bottom level during normal construction, all the other submersible pumps are as for subsequent use.
After adopting technique scheme, super dark batholith deep foundation ditch of the present invention falls water discharge method and has the following advantages:
1, construction sequence is reasonable in design, simple to operate;
2, the crevice water of getting rid of the basement rock deep foundation ditch guarantees that bed course builds rear concrete mat surface without open fire;
3, guarantee the construction quality of underground concrete structure, reduce Construction Cost.
Description of drawings
Fig. 1 is the Whirlwind tank foundation ditch bottom discharge system architecture schematic diagram of the embodiment of the invention;
Fig. 2 is the A-A sectional view among Fig. 1.
Among the figure: 1 structural cushion coat bottom surface, 2 sloping sidewall steel pipes, 3 Whirlwind tanks, steel deck-plate on 4 collecting wells, 5 draining steel pipes, embedded steel tube in the bed course around the 6 Whirlwind tanks bottom.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
Now see also Fig. 1 and Fig. 2, Fig. 1 is the Whirlwind tank foundation ditch bottom discharge system architecture schematic diagram of the embodiment of the invention, and Fig. 2 is the A-A sectional view among Fig. 1.
Water discharge method falls in super dark batholith deep foundation ditch of the present invention, is used for being seated in the hot rolling Whirlwind tank inclined bottom plate structure construction on the batholith, it is characterized in that may further comprise the steps:
A, french drain white-out underground water is set
After the Whirlwind tank earthwork evacuation is complete, before building bed course, form drainage system, make on the bed course without ponding, earthwork evacuation arranges french drain all around to substrate, change behind the gutter of sectional dimension 500x500mm in the excavation and fill out rubble, the body refuse complete liquidation of excavation french drain is finished, and making complete in the french drain is that rubble is unimpeded by water;
B, gutter white-out sidewall crevice water is set
French drain change fill out rubble before, the steel pipe of pre-buried DN125 in french drain, perforate around steel pipe, the perforate size is 20mm on the steel pipe, and pre-buried by 5% the gradient, all around the slope aspect collecting well, before burying steel pipe, fill up first the part rubble, and then the installation steel pipe, with rubble steel pipe is embedded in the french drain again, with around the water drainage to collecting well; Described Whirlwind tank bottom from-12.5～-18.6m is the desk-top base plate of back taper, because groundwater table is higher, comparatively serious from the crack of stone infiltration on the slope, the water on the slope flows on the base plate, before the sealing bed course, first rubble loose on the slope is cleaned out, and fluting on the slope, the steel pipe of pre-buried ∮ 48, and be communicated with DN125 steel pipe in the french drain, make the water on the slope concentrate flow into pipe laying the french drain from steel pipe, and with mortar with slope pipe laying shutoff;
C, collecting well is set
Collecting well and french drain that a 1000x1000x1500mm is set in the bottom of foundation ditch connect, collecting well adopts the thick steel plate of 10mm to make, the steel pipe of the ∮ 125 that french drain is pre-buried penetrates from the collecting well side, with the underground water drainage to collecting well, and perforate around collecting well, be convenient to the inflow of catchmenting of base plate, and set up steel deck-plate on collecting well top, steel deck-plate adopts the thick steel plate of 10mm to make, and put more energy into the L50*5 angle steel, after processing factory makes, winch to foundation ditch with the 16t crane, directly lay, and around collecting well the rubble of backfill 10～50mm;
D, installation plastic sheeting water barrier
After Whirlwind tank substrate french drain and slope pipe laying have been constructed, lay old template at french drain, before the sealing bed course, skew wall is laid the thick plastic sheeting of 0.08mm around substrate reaches, the upper end is connected with the band steel compression of Whirlwind tank waist rail bottom with 25*3, and fix with expansion bolt, the lower end is covered at the bottom of the whole pond, and the water on the slope flows into collecting well after naturally just flowing directly into the gutter like this;
Row's underground water falls in e, installing submersible pump
After the substrate drainage system forms, the water drainage to collecting well, is installed the dredge pump of 5 50m lifts, and one of them bore is 100mm, all the other 4 bores are 50mm, water pump bottom, is left two and is drawn water and get final product (float valve is set) greater than 20cm from the collecting well bottom level during normal construction, all the other water pumps are as for subsequent use, delivery port welding with steel pipe and water pump, water pump directly buries with below the structure base slab, water directly is evacuated to catch-basin gets final product, and in time builds bottom cushion after the drainage system installation.
Super dark batholith deep foundation ditch of the present invention fall water discharge method Yantai Baosteel Tube hot rolling Whirlwind tank construct enterprising enforcement with and promote, all underground water are discharged in collecting well by submersible pump, without open fire, dewatering effect is good in the foundation ditch.The Whirlwind tank inclined bottom plate concrete compaction of constructing, the leakproof phenomenon is for Whirlwind tank has been created favourable condition along practice structure construction.
Above embodiment is only for explanation the present invention, but not limitation of the present invention, person skilled in the relevant technique in the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (5)
1. water discharge method falls in a super dark batholith deep foundation ditch, is used for being seated in the hot rolling Whirlwind tank inclined bottom plate structure construction on the batholith, it is characterized in that may further comprise the steps:
A, french drain white-out underground water is set
After the Whirlwind tank earthwork evacuation is complete, before building bed course, form drainage system, make on the bed course without ponding, earthwork evacuation arranges french drain all around to substrate, change behind the excavation gutter and fill out rubble, the body refuse complete liquidation of excavation french drain is clean, and making complete in the french drain is that rubble is unimpeded by water;
B, gutter white-out sidewall crevice water is set
French drain change fill out rubble before, embedded steel tube in french drain, and perforate around the steel pipe, and pre-buried by 5% the gradient, the slope aspect collecting well filled up first the part rubble before burying steel pipe all around, and then the installation steel pipe, with rubble steel pipe is embedded in the french drain again, with around the water drainage to collecting well; Described Whirlwind tank bottom is the desk-top base plate of back taper, because groundwater table is higher, comparatively serious from the crack of stone infiltration on the slope, the water on the slope flows on the base plate, before the sealing bed course, first rubble loose on the slope is cleaned out, and fluting on the slope, the steel pipe of pre-buried ∮ 48, and be communicated with DN125 steel pipe in the french drain, make the water on the slope concentrate flow into pipe laying the french drain from steel pipe, and with mortar with slope pipe laying shutoff;
C, collecting well is set
A collecting well and french drain are set in the bottom of foundation ditch to be connected, collecting well adopts the thick steel plate of 10mm to make, the steel pipe of the ∮ 125 that french drain is pre-buried penetrates from the collecting well side, with the underground water drainage to collecting well, and perforate around collecting well, be convenient to the inflow of catchmenting of base plate, and set up steel deck-plate on collecting well top, steel deck-plate adopts the thick steel plate of 10mm to make, and put more energy into the L50*5 angle steel, after processing factory makes, winch to foundation ditch with the 16t crane, directly lay, and around collecting well the rubble of backfill 10～50mm;
D, installation plastic sheeting water barrier
After Whirlwind tank substrate french drain and slope pipe laying have been constructed, lay old template at french drain, before the sealing bed course, skew wall is laid the thick plastic sheeting of 0.08mm around substrate reaches, the upper end is connected with the band steel compression of Whirlwind tank waist rail bottom with 25*3, and fix with expansion bolt, the lower end is covered at the bottom of the whole pond, and the water on the slope flows into collecting well after naturally just flowing directly into the gutter like this;
Row's underground water falls in e, installing submersible pump
After the substrate drainage system forms, with the water drainage to collecting well, installing submersible pump, delivery port welding with steel pipe and submersible pump, submersible pump directly buries with below the structure base slab, water directly is evacuated to catch-basin gets final product, and in time builds bottom cushion after the drainage system installation.
2. water discharge method falls in super dark batholith deep foundation ditch as claimed in claim 1, it is characterized in that, and among the described step a, sectional dimension 500x500mm in the gutter.
3. water discharge method falls in super dark batholith deep foundation ditch as claimed in claim 1, it is characterized in that among the described step b, embedded steel tube is the DN125 steel pipe in french drain, and the perforate size is 20mm on the steel pipe.
4. water discharge method falls in super dark batholith deep foundation ditch as claimed in claim 1, it is characterized in that among the described step c, collecting well is of a size of 1000x1000x1500mm.
5. water discharge method falls in super dark batholith deep foundation ditch as claimed in claim 1, it is characterized in that, among the 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, submersible pump bottom from the collecting well bottom level greater than 20cm.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469799A (en) * | 2013-09-24 | 2013-12-25 | 中国建筑第二工程局有限公司 | Excavation method for red mudstone soil elevator foundation pit below underground water level in cold region |
| CN104314090A (en) * | 2014-08-29 | 2015-01-28 | 中铁八局集团建筑工程有限公司 | Deep foundation pit bedrock drainage culvert and drainage system and drainage construction method thereof |
| CN104452813A (en) * | 2014-11-06 | 2015-03-25 | 国家电网公司 | Method for protecting underground powerhouse gate shaft against water seepage |
| CN108457680A (en) * | 2018-02-01 | 2018-08-28 | 中铁十二局集团有限公司 | A kind of waterproof technology of water rich strata Station abutment wall |
| CN108589796A (en) * | 2018-04-27 | 2018-09-28 | 中铁十二局集团有限公司 | Substrate aproll processing method |
| 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 |
| CN110424428A (en) * | 2019-07-30 | 2019-11-08 | 瑞洲建设集团有限公司 | The construction method of the comprehensive Yield rainfall relation system of deep basal pit |
| CN110670613A (en) * | 2019-08-22 | 2020-01-10 | 北京东地岩土工程有限公司 | Anti-seepage structure of foundation pit elevator shaft 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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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469799A (en) * | 2013-09-24 | 2013-12-25 | 中国建筑第二工程局有限公司 | Excavation method for red mudstone soil elevator foundation pit below underground water level in cold region |
| CN104314090A (en) * | 2014-08-29 | 2015-01-28 | 中铁八局集团建筑工程有限公司 | Deep foundation pit bedrock drainage culvert and drainage system and drainage construction method thereof |
| CN104452813A (en) * | 2014-11-06 | 2015-03-25 | 国家电网公司 | Method for protecting underground powerhouse gate shaft against water seepage |
| CN108457680A (en) * | 2018-02-01 | 2018-08-28 | 中铁十二局集团有限公司 | A kind of waterproof technology of water rich strata Station abutment wall |
| CN108589796A (en) * | 2018-04-27 | 2018-09-28 | 中铁十二局集团有限公司 | Substrate aproll processing method |
| 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 |
| CN110424428A (en) * | 2019-07-30 | 2019-11-08 | 瑞洲建设集团有限公司 | The construction method of the comprehensive Yield rainfall relation system of deep basal pit |
| CN110670613A (en) * | 2019-08-22 | 2020-01-10 | 北京东地岩土工程有限公司 | Anti-seepage structure of foundation pit elevator shaft and construction method thereof |
| 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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