CN205077527U - Drainage system is dredged to basement bottom plate release water buoyancy method - Google Patents

Drainage system is dredged to basement bottom plate release water buoyancy method Download PDF

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Publication number
CN205077527U
CN205077527U CN201520658021.2U CN201520658021U CN205077527U CN 205077527 U CN205077527 U CN 205077527U CN 201520658021 U CN201520658021 U CN 201520658021U CN 205077527 U CN205077527 U CN 205077527U
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CN
China
Prior art keywords
basement
drainage
water
board
buoyancy
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Expired - Fee Related
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CN201520658021.2U
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Chinese (zh)
Inventor
孙宏智
梁森
李旋
资辉鹏
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China Construction Fourth Bureau First Construction Engineering Co Ltd
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China Construction Fourth Bureau First Construction Engineering Co Ltd
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Priority to CN201520658021.2U priority Critical patent/CN205077527U/en
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Publication of CN205077527U publication Critical patent/CN205077527U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a drainage system is dredged to basement bottom plate release water buoyancy method should dredge drainage system and be the original state soil of room bottom plate below underground or backbreak to banket and go up the netted drainage french drain that the excavation has vertically and horizontally staggered, laid continuous plastics protection network in every drainage french drain, buried plastics french drain pipe in the drainage french drain of laying the plastics protection network underground to cover with the rubble hydrophobic layer, the outlet and sump pit intercommunication of plastics french drain pipe, the sump pit is connected with drainage device through transparent water pipe, being equipped with the polyethylene protection film on rubble hydrophobic layer upper berth and separating the thick liquid layer, pour the concrete cushion on the polyethylene protection film separates the thick liquid layer, the basement bottom plate sets up on the concrete cushion. The utility model discloses can make the water lowering under the basement bottom plate, the buoyancy that the basement bottom plate received is weakened by release, can guarantee like this that the basement bottom plate is in among the dynamic balance all the time.

Description

A kind of basement bottom board release water buoyancy method water drainage system
Technical field
The utility model relates to a kind of basement bottom board release water buoyancy method water drainage system, belongs to highrise building Construction Technique of Underground Works field.
Background technology
The anti-floating mode that basement bottom board is traditional, if uplift pile, Pulling-Resistant Anchor Rod method and ballast method etc. are all that the mode utilizing dynamic balance to add sealing is carried out anti-stifled to buoyancy force of underground water.Although said method designing axiom is reasonable, later maintenance is simple, but its engineering cost takes up an area lower structural cost about 20% ~ 50%, cost drops into more, and a large amount of use highly energy-consuming material, huge, larger to resource consumption for environment pollution impact, construction speed is slow, and high to the cracking resistance of structure, anticorrosive, anti-bending moment requirements, once design or construction wrong often impact the Long-Time Service of works and comfortableness.
Utility model content
The purpose of this utility model is: provide a kind of basement bottom board to discharge water buoyancy method water drainage system, drop into more to solve basement bottom board construction cost, and a large amount of use highly energy-consuming material, huge for environment pollution impact, comparatively large to resource consumption, the problem that construction speed is slow.
The technical solution of the utility model: a kind of basement bottom board release water buoyancy method water drainage system, this water drainage system is that on undisturbed soil below basement bottom board or backbreak bankets, excavation has crisscross netted weeper drain, continuous print plastic protection net is equipped with in every bar weeper drain, plastic blind-ditch pipe is buried underground in the weeper drain being equipped with plastic protection net, and cover with rubble drainage blanket, the outfall of described plastic blind-ditch pipe is communicated with collecting well, and collecting well is connected with dewatering installation by transparent water pipe; Rubble drainage blanket is equipped with polyethylene protective film every pulp layer, in pulp layer, built concrete cushion at polyethylene protective film, basement bottom board is arranged on concrete cushion.
Aforesaid weeper drain is more than or equal to 0.5% towards the drainage grade in collecting well direction, prevents the underground water collected from flowing backwards.
The outer wall of aforesaid plastic blind-ditch pipe is enclosed with geotextiles.
The ballast grain sizes of aforesaid rubble drainage blanket is 5 ~ 20mm, and ramming degree of filling out is 0.9.
Aforesaid dewatering installation is water tap or automatic water pump.
Aforesaid basement bottom board surface is provided with building coats, levelling for basement bottom board.
Owing to adopting technique scheme, the utility model has the advantage of: the utility model utilizes the rubble drainage blanket of gamut planar distribution below basement bottom board to collect seepage in underground, remittance is to the weeper drain of net distribution, again the water in french drain is concentrated in the equally distributed some collecting wells of point-like, dewatering installation is established in collecting well, when water level in collecting well goes up to certain altitude, by dewatering installation, water is taken away in time, thus the water level under making basement bottom board reduces, buoyancy suffered by basement bottom board is released and weakens, can ensure that basement bottom board is among dynamic equilibrium all the time like this.Compared with prior art, the drainage and anti-float construction method that the utility model utilizes decompress(ion), the mode of dredging eliminates underground structure sole buoyancy and water pressure, without the need to arranging traditional measure of anti float such as Pulling-Resistant Anchor Rod, base plate thickness can also be reduced, therefore construction cost is low and do not expend the duration, avoid using highly energy-consuming material in a large number, little, less to resource consumption for environment pollution impact, construction cost is low, the engineering time is short, work progress is easy, safety, improve construction efficiency, draw materials conveniently, require low to construction environment, construction machinery.The utility model is specially adapted to that ground is that weak water permeability soil layer, groundwater run off are little, groundwater table below building base plate or in the underground construction of wet season groundwater table higher than building base plate, there is popularizing application prospect widely.
Accompanying drawing explanation
Structural representation when Fig. 1 is the utility model enforcement;
Fig. 2 is the sectional view of the structural representation of weeper drain in the utility model;
Fig. 3 is the sectional view of the structural representation of collecting well in the utility model.
Description of reference numerals: 1-undisturbed soil or backbreak bankets, 2-plastic protection net, 3-rubble drainage blanket; 4-polyethylene protective film every pulp layer, 5-concrete cushion, 6-basement bottom board; 7-plastic blind-ditch pipe; 8-building coats, 9-cohesive soil, 10-sidewall of basement; 11-C15 element concrete; 12-dewatering installation, the transparent water pipe of 13-, 14-collecting well.
Detailed description of the invention
In order to make the utility model object, technical scheme and advantage clearly, below in conjunction with drawings and Examples, the utility model is described in further detail.
The structural representation of basement bottom board release water buoyancy method water drainage system of the present utility model as shown in Figures 1 to 3, this water drainage system is that undisturbed soil below basement bottom board 6 or the backbreak excavation on 1 that bankets has crisscross netted weeper drain, described weeper drain is more than or equal to 0.5% towards the drainage grade in collecting well 14 direction, prevents the underground water collected from flowing backwards.Continuous print plastic protection net 2 is equipped with in every bar weeper drain, plastic blind-ditch pipe 7 is buried underground in the weeper drain being equipped with plastic protection net 2, the outer wall of described plastic blind-ditch pipe 7 is enclosed with geotextiles, then cover on plastic blind-ditch pipe 7 with rubble drainage blanket 3, the outfall of described plastic blind-ditch pipe 7 is communicated with collecting well 14, collecting well 14 is connected with dewatering installation 12 by transparent water pipe 13, and described dewatering installation 12 is automatic water pump; Rubble drainage blanket 3 is equipped with polyethylene protective film every pulp layer 4; in pulp layer 4, concrete cushion 5 has been built at polyethylene protective film; basement bottom board 6 is arranged on concrete cushion 5, and basement bottom board 6 surface is provided with building coats 8, levelling for basement bottom board 6.
Embodiment
The present embodiment is for the length being positioned at Fushan City, Guangdong Province magnificent business central international North project, this project is positioned at other " five happinesses small house " plot, Shi Shan sports palace, Nanhai District Foshan City, to the east of science and technology North Road, on the south universal love Road, to the west of Red Star South Road, its floor space about 5.2 ten thousand square metres, overall floorage about 46.8 ten thousand square metres, F3/B3.
This example, when Specific construction, is undertaken by following construction sequence:
(1) as shown in Figures 1 to 3, when excavating weeper drain excavation by drainage grade >=0.5%, sole plate mechanical equivalent of light excavation, to the earthwork that should retain about 20cm during design elevation, adopts hand excavation, ensure that foundation ditch substratum is not destroyed by disturbance, reach undisturbed soil quality.After being excavated to setting absolute altitude, tackling native surface and carry out compaction treatment.French drain adopts hand fit mechanical equivalent of light excavation, is excavated to apart from changing during about design elevation 20cm with hand digging finishing shaping, must not undisturbed soil bottom disturbance weeper drain or backbreak and banket 1.If excavation exceedes absolute altitude, must can not to fill and lead up with rubble or sand with backfill of loosening the soil, jolt ramming.
(2) along the plastic protection net 2 of continuous laying filtering underground bottom weeper drain, lay block and adopt and to sew up or overlap joint connects, stitching nylon wire intensity must not be less than 150N; Adjacent laying block lap width should not be less than 800mm.Manually roll paving, during laying, cloth cover need keep smooth, straight, reduces lap joint as far as possible and suitably leaves distortion allowance.
(3) in the weeper drain being equipped with plastic protection net 2, plastic blind-ditch pipe 7 (drainage grade >=0.5%) is buried underground, then on plastic blind-ditch pipe 7, lay the thick rubble drainage blanket 3 of 350mm, ballast grain sizes is 5 ~ 20mm, and rubble requires compacting process, and ramming degree of filling out is 0.9.Rubble drainage blanket 3, when foundation ditch inner plane is laid, must be walked on the scaffold floor arranged, walking of directly must not pulling a cart on rubble.Plastic blind-ditch pipe 7 should carry out plastic blind-ditch pipe 7 center line before installing and elevation is checked, and ensure that plastic blind-ditch pipe 7 to collecting well 14 gradient should not be less than 0.5%, forbid to occur adverse slope phenomenon, the connection between plastic blind-ditch pipe 7 need meet designing requirement.
(4) on rubble drainage blanket 3, lay polyethylene protective film every pulp layer 4, adopt overlap joint to connect during laying, lap length should not be less than 300mm, and guarantees that the phenomenon such as breakage, hole must not appear in plastic sheeting, in order to avoid cement paste infiltrates rubble drainage blanket 3.
(5) in pulp layer 4, built concrete cushion 5 at polyethylene protective film, the concrete cushion 5 of having built should use covered rearing with plastic film maintenance in 12 hours, and curing time must not be less than 7 days.Finally, on concrete cushion 5, build basement bottom board 6, basement bottom board 6 surface is provided with building coats 8, levelling for basement bottom board 6.
For ensureing the effect of release water buoyancy system, during sidewall of basement 10 backfilling of earthwork, isolated underground water infiltrates from pit backfill soil, requires as follows to ground recent fill and pit backfill:
(1) in the scope of 3 meters below earth's surface, pit backfill material is forbidden to adopt the coarse particulate material such as building waste, rubble, sand that hydrophobicity is good, and adopts the cohesive soil 9 that water-resisting property is good, and argillic horizon 9 transmission coefficient should be less than or equal to 5 ~ 10cm/s; Scope apart from less than 3 meters, earth's surface then backfills with water permeability good C15 element concrete 11;
(2), before pit backfill, to first clean out if there is brick slag, building waste etc. outside sidewall of basement 10;
(3) strictly carry out the compaction in layers operation of backfill, guarantee that backfill forms closely knit water proof overall.
The collecting well 14 of right quantity is set at the basement periphery not affecting use, collecting well 14 is connected with dewatering installation 12 by transparent water pipe 13, described dewatering installation 12 is the automatic water pump according to water lev el control start and stop, arranges a stand by pump if desired, standby during routine work failure of pump.Transparent water pipe 13 can monitor the abnormal situation about uprising of hydraulic pressure, when the water level in collecting well 14 reaches warning line, discharged by the underground water of the automatic water pump in collecting well 14 by collection again, thus the water level under basement bottom board 6 is reduced, buoyancy suffered by basement bottom board 6 is released and weakens, and can ensure that basement bottom board 6 is among dynamic equilibrium all the time like this.
Basement bottom board due to this project utilizes structure of the present utility model to implement, thus eliminate 1 meter of traditional thick basement bottom board, the difficulty of construction such as 2218 permanent Pulling-Resistant Anchor Rods of Ф 32 and plate flexible waterproof layer are relatively large, the operation of technique relative complex, compare the rubble drainage blanket of increase and a small amount of grade beam, reach minimizing base plate thickness, avoid using highly energy-consuming material in a large number, little for environment pollution impact, less to resource consumption, there is obvious carbon reduction, seepage water can also be used as watered flowers, wash etc., saving water resource, execute cost low, engineering time is short, shorten the object of construction period, the buoyancy simultaneously removing the generation of this building destroys and the moist leakage problems of orlop basement.

Claims (6)

1. a basement bottom board release water buoyancy method water drainage system, it is characterized in that: have crisscross netted weeper drain at the undisturbed soil or backbreak of basement bottom board (6) below (1) the upper excavation that bankets, continuous print plastic protection net (2) is equipped with in every bar weeper drain, plastic blind-ditch pipe (7) is buried underground in the weeper drain being equipped with plastic protection net (2), and cover with rubble drainage blanket (3), the outfall of described plastic blind-ditch pipe (7) is communicated with collecting well (14), collecting well (14) is connected with dewatering installation (12) by transparent water pipe (13), rubble drainage blanket (3) is equipped with polyethylene protective film every pulp layer (4), has built concrete cushion (5) at polyethylene protective film in pulp layer (4), basement bottom board (6) is arranged on concrete cushion (5).
2. basement bottom board release water buoyancy method water drainage system according to claim 1, is characterized in that: described weeper drain is more than or equal to 0.5% towards the drainage grade in collecting well (14) direction.
3. basement bottom board release water buoyancy method water drainage system according to claim 1, is characterized in that: the outer wall of described plastic blind-ditch pipe (7) is enclosed with geotextiles.
4. basement bottom board release water buoyancy method water drainage system according to claim 1, it is characterized in that: the ballast grain sizes of described rubble drainage blanket (3) is 5 ~ 20mm, ramming degree of filling out is 0.9.
5. basement bottom board release water buoyancy method water drainage system according to claim 1, is characterized in that: described dewatering installation (12) is water tap or automatic water pump.
6. basement bottom board release water buoyancy method water drainage system according to claim 1, is characterized in that: described basement bottom board (6) surface is provided with building coats (8).
CN201520658021.2U 2015-08-28 2015-08-28 Drainage system is dredged to basement bottom plate release water buoyancy method Expired - Fee Related CN205077527U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201520658021.2U CN205077527U (en) 2015-08-28 2015-08-28 Drainage system is dredged to basement bottom plate release water buoyancy method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105569094A (en) * 2015-08-28 2016-05-11 中建四局第一建筑工程有限公司 Water discharge and drainage system and construction method adopting basement bottom plate water buoyant force releasing method
CN106760722A (en) * 2017-02-28 2017-05-31 南通华荣建设集团有限公司 Without pile foundation individual layer underground garage anti-floating construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105569094A (en) * 2015-08-28 2016-05-11 中建四局第一建筑工程有限公司 Water discharge and drainage system and construction method adopting basement bottom plate water buoyant force releasing method
CN106760722A (en) * 2017-02-28 2017-05-31 南通华荣建设集团有限公司 Without pile foundation individual layer underground garage anti-floating construction method

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160309

Termination date: 20170828

CF01 Termination of patent right due to non-payment of annual fee