CN105544622B

CN105544622B - A kind of anti-floating system and its checking device of underground structure

Info

Publication number: CN105544622B
Application number: CN201610087685.7A
Authority: CN
Inventors: 龚展宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-06-05
Filing date: 2016-02-15
Publication date: 2018-09-14
Anticipated expiration: 2036-02-15
Also published as: CN105544622A; CN106284434A

Abstract

The invention discloses a kind of anti-floating systems of the underground structure in impervious stratum：By combination application every oozing device, drainage arrangement and drainage channel checking device, the buoyancy force of underground water suffered by underground structure is effectively reduced, to reliably achieve the purpose for preventing underground structure from floating.It is exactly specifically：Foundation pit backfill area top between hypogee exterior wall (6) and hypogee foundation pit boundary (4) constructs a level every infiltration layer (3)；A permeable ground (1) is constructed in foundation pit backfill region lower part；It is laid with the parallel porous collector pipe or water collector (17,18) that at least two are not connected to directly mutually in the permeable ground (1) and each communicates at least one water outlet (2).After taking above-mentioned measure, the anti-uplift ground water level of the underground structure is determined by the absolute altitude of identical at least two water outlets (2) of the absolute altitude.A kind of ground water drainage access checking device of underground structure is also disclosed in the present invention.

Description

A kind of anti-floating system and its checking device of underground structure

Technical field

The present invention relates to the hypogees in a kind of anti-floating system of underground structure more particularly to a kind of impervious stratum The anti-floating system of object, the invention further relates to a kind of checking device of anti-floating of underground building device, more particularly to one kind are waterproof The ground water drainage access checking device of underground structure in soil layer.

Background technology

In order to avoid buoyancy force of underground water causes underground structure to float, the prior art uses all kinds of measure of anti float：A. it sets Uplift pile is set, the buoyancy suffered by underground structure is offset by the withdrawal resistance of uplift pile；B., ballast is set, by ballast Gravity offsets the buoyancy suffered by underground structure；C., apparatus for draining subsurface water is set, underground water is reduced by the way that underground water is discharged Water level, to reduce the buoyancy suffered by underground structure.These three measures respectively have deficiency：The engineering of the measure of a classes and b. class measures Costly, economy is poor；The a class measure completions time of project are longer；The measure of c classes needs a large amount of pump drainage underground water during use, Maintenance cost is higher；Part measure in c class measures needs just to can guarantee thorough pump drainage underground in exterior wall and bottom plate brill many holes Water, therefore have certain influence using function to hypogee；C class measure drainage channels are in the wind for having siltation to block over the long term Danger.

It is below impervious stratum (8) with hypogee foundation pit boundary (4) surrounding soil layer for hypogee bottom plate (5) Geological environment, the source of underground water is mainly the downward seepage flow of surface soil layer backwater in hypogee foundation pit backfill region, described Without other underground water such as diving, artesian water within the scope of the foundation pit of hypogee.For this kind of geological environment, there is technical measures suggestion to adopt With d class measures：The backfill in region is backfilled using cohesive soil or dirt and layered rolling to foundation pit or rams densification reality, it is intended to whereby The buoyancy suffered by underground structure is eliminated in measure.But be affected by human factors due to " rolling or ramming pressure " in work progress it is larger, Construction quality be difficult to ensure it is reliable and stable, so this measure is difficult to make us trusting.

In hydraulic engineering and port engineering, extensively using various composite geo-membranes as vertical seepage control material, every Ooze that effect is fine, this kind of material is introduced being used every field of oozing for underground structure underground water by the present invention；In patent document【Application Numbers 201420655634.6】A kind of drainage arrangement of underground structure underground water is disclosed in (hereinafter referred to as document 1), the present invention The anti-floating field for being introduced into underground structure uses.

Invention content

It is below impervious stratum (8) with hypogee foundation pit boundary (4) surrounding soil layer for hypogee bottom plate (5) Geological environment, the present invention provides a kind of simple and reliable anti-floating of underground building methods：By combination application every oozing device And drainage arrangement, the buoyancy force of underground water suffered by underground structure is effectively reduced, is reliably prevented on underground structure to reach Floating purpose.The present invention also provides a kind of ground water drainage access checking devices of underground structure, can be to ground water drainage Whether access is unobstructed to be checked at any time.

Technical scheme of the present invention：Foundation pit backfill between hypogee exterior wall (6) and hypogee foundation pit boundary (4) Region lower part constructs a permeable ground (1) and is connected to the identical water outlet (2) of at least two absolute altitudes, the permeable ground (1) It is full of whole foundation pits in the horizontal direction and backfills region；Construct a level every infiltration layer (3) in foundation pit backfill area top, it is described every The whole foundation pits of infiltration layer (3) covering backfill region, see Fig. 1, Fig. 2；After taking above-mentioned measure, the anti-floating of the underground structure is set up defences Water level is determined by the absolute altitude of at least two water outlets (2).

It is described to be selected by one of following devices every infiltration layer (3)：A. described to use the soft of composite geo-membrane composition every infiltration layer (3) It is property, successional every oozing material；B. described to use earth material mixing impermeable material, earth material mixing impermeable material every infiltration layer (3) Including at least cohesive soil, dirt or soil cement, and layered rolling or rammer densification are real；C. described to be superimposed using soil every infiltration layer (3) It material mixing impermeable material and is made of composite geo-membrane flexible, successional every oozing material.It is described to form slope every infiltration layer (3) Drop is higher than close to underground structure one end (9) absolute altitude far from underground structure one end (10) absolute altitude.

It is described constituted using composite geo-membrane every infiltration layer (3) it is flexible, successional when oozing material, it is described flexible every oozing Layer (3) and the equal tight seal of underground structure exterior wall (6) or hypogee top plate (7) junction, the flexibility are prolonged every infiltration layer (3) It extends to and is completely embedded sealing with impervious stratum (8) other than hypogee foundation pit boundary (4)；It is described soft when there is underground piping to pass through Property when infiltration layer (3), it is described flexible to be completely embedded sealing every infiltration layer (3) and underground piping outer surface.As flexibility every infiltration layer (3) The further in-depth of connection scheme, the flexible connection every infiltration layer (3) close underground structure one end (9) and underground structure Using one of following two kinds of modes：A. two protrusions (15) are set in hypogee exterior wall (6), the flexibility is leaned on every infiltration layer (3) Nearly underground structure one end (9) rises to the lower section of item in exterior wall protrusion (15) along hypogee exterior wall (6), then builds on the outside It builds brick wall or casting concrete (16) compresses sealing, see Fig. 3；B. described flexible every the close underground structure one end (9) of infiltration layer (3) It is adjacent to hypogee top plate (7) and compresses sealing with weight (14) is compressed, see Fig. 4.It is described it is flexible every infiltration layer (3) remotely under Building one end (10) and the connection of the impervious stratum (8) other than the foundation pit of hypogee use following manner：It is described it is flexible every Within the impervious stratum (8) that infiltration layer (3) is inserted into far from underground structure one end (10) other than the foundation pit of hypogee and compress close Real closing.

The permeable ground (1), water outlet (2) referenced patent document【Document 1】Content select：The permeable ground (1) fine sand, middle sand, coarse sand, gravelly sand, dust, circle gravel, rubble or cobble are included at least；The water outlet (2) is built across underground It builds exterior wall (6) and leads to lower ground, mine pit or pipe trench in the room of hypogee.

In order to ensure that the permeable ground (1) is always unobstructed to the ground water drainage access between water outlet (2), it is arranged Ground water drainage access checking device：At least two parallel porous collector pipes or collection are laid in the permeable ground (1) Hydrophone (17,18)；It is not connected to directly mutually between two collector pipes or water collector (17,18), two collector pipes or water collector Flow in (17,18) can only be carried out by the hole of the permeable ground (1) between two collector pipes or water collector (17,18) Interaction circulation；The every collector pipe or water collector (17,18) each communicate at least one water outlet (2), see Fig. 5.Thereto One water outlet (2) water filling, observes whether another water outlet (2) drains,EnergyThe permeable ground (1) is checked to going out Whether the ground water drainage access between the mouth of a river (2) is unobstructed.Mud, husky siltation are in collector pipe or water collector (17,18) in order to prevent Inlet opening, every collector pipe or water collector (17,18) outer surface cladding is at least one layer of crosses filter mud, husky filter cloth or filter membrane.

The device have the advantages that：

Compared with d class measures are used alone, the present invention by using permeable ground (1), water outlet (2), every infiltration layer (3) Aggregate measures, it is ensured that anti-floating of underground building is safe and reliable：May insure to reduce even every infiltration layer (3) prevents earth's surface infiltration from penetrating into Within the foundation pit of hypogee；Water yield by observing water outlet (2) can find defect in time and adopt remedial measures, it is ensured that Construction quality；Even if any accident occur causes to permeate the ground within building foundation pit, permeable ground (1) and water outlet (2) The underground water of infiltration can also be discharged in time, prevent in the foundation pit of hypogee groundwater level rise to anti-uplift ground water level with On, it is ensured that underground structure safety.

Compared with the measure of a classes and b class measures, anti-floating system of the invention can reduce uplift pile or ballast, engineering Expense is relatively low.Compared with c class measures are used alone, the present invention is by being arranged every infiltration layer (3) and examining its sealing performance basic Earth's surface can be prevented to permeate the ground within building foundation pit, only need a small amount of pump drainage underground water, maintenance cost during use It is relatively low；Under extreme case, earth's surface can be entirely prevented to permeate the ground within building foundation pit every infiltration layer (3), do not needed substantially Pump drainage underground water, maintenance cost are extremely low；Since water outlet (2) quantity of needs is few, it is only necessary to a small amount of through walls in exterior wall (6) arrangement Hole, hypogee use are substantially unaffected.

(this section of vacancy)

When the long-term anhydrous outflow of water outlet (2), the patency for checking its drainage channel is needed.It can a water outlet thereto (2) water filling, observes whether another water outlet (2) drains, to check the permeable ground (1) between water outlet (2) Whether ground water drainage access is unobstructed.The ground water drainage access checking device of the present invention can check the permeable ground at any time (1) whether unobstructed to the ground water drainage access between water outlet (2), it prevents siltation from blocking and causes security risk.

Description of the drawings

Fig. 1 is that underground structure top elevation is above the ground level the hypogee foundation pit backfill region sectional view of absolute altitude

Fig. 2 is hypogee foundation pit backfill region sectional view of the underground structure top elevation less than ground elevation

Fig. 3 is that flexibility connect detail drawing every infiltration layer with underground structure exterior wall

Fig. 4 is that flexibility connect detail drawing every infiltration layer with underground structure top plate

Fig. 5 is parallel collector pipe or water collector and water outlet position relationship floor map

In figure：1-- permeable grounds；2-- water outlets；3-- is every infiltration layer；The hypogees 4-- foundation pit boundary；The hypogees 5-- Bottom plate；The hypogees 6-- exterior wall；The hypogees 7-- top plate；Impervious stratum other than the foundation pit of the hypogees 8--；9- closely under Building every infiltration layer one end；10-- is far from underground structure every infiltration layer one end；11-- foundation pits lower part backfill；12- foundation pits Top backfill；13- earth's surface backfills；14-- compresses weight；The hypogees 15-- exterior wall protrusion；The outer brick-on-edge walls of 16- or coagulation Soil block；17, the parallel collector pipes of 18- or water collector

Specific implementation mode

Embodiment 1

More than basement roof there are 1m thickness earthing in two layers of basement buried depth 10m of certain building, part without above-ground structures, Soil layer is argillic horizon around the foundation pit of hypogee.Basement floating-up in order to prevent compares the anti-floating system of invention With beat two kinds of schemes of anti-floating pile：According to a conventional method, using elevation of levelled ground as basement anti-uplift ground water level, it is necessary to beat anti-floating Stake；Using the anti-floating system of invention, using the absolute altitude of water outlet 2 as basement anti-uplift ground water level, local basement It would not float.The relatively later anti-floating system for determining to use invention, specific implementation method are：In hypogee exterior wall 6 reserve 2 wall conduit of water outlet at the 2.0m of bottom；Foundation pit backfill is constructed in the following order from bottom to top：It is opened with place The backfilling of earthwork lower part soil layer 11 digged up is to the absolute altitude close to 2 conduit of water outlet --- backfill intermediate permeable ground 1 with medium coarse sand And it is distributed to whole foundation pit backfills region, it is placed during this period around a pair of parallel more of hypogee among permeable ground 1 Hole collector pipe 17,18 simultaneously respectively leads to 2 conduit of water outlet --- the backfilling of earthwork upper soil horizon being excavated with place Laying that 12 to every 3 absolute altitude of infiltration layer --- each soil layer compaction in layers in backfilling process --- is flexible to cover whole foundation pits backfills every infiltration layer 3 Region and the impervious stratum 8 other than hypogee foundation pit boundary 4 is extended to, sees Fig. 2 --- it is flexible to be inserted into ground every infiltration layer one end 10 Within impervious stratum 8 other than lower building foundation pit and press closely closing --- it is flexible to be pushed up every the infiltration layer other end 9 and hypogee Plate 7 is adjacent to and compresses sealing with weight 14 is compressed, and sees Fig. 4 --- and backfill surface soil layer 13 simultaneously completes various pipes installation.

Hypogee during use, observe that water outlet 2 there are flowing out, but water very little, formation are dripped.Building is heavy Drop observation has no apparent deformation, and the components such as structural beams, column are working properly, have no crack, it was demonstrated that using the absolute altitude of water outlet 2 as ground Lower room anti-uplift ground water level is safe and reliable.

Embodiment 2

Two layers of basement buried depth 10m of certain building, local above-ground structures only have one layer, and basement roof is higher than outdoor ground Face, soil layer is argillic horizon around the foundation pit of hypogee, using the device anti-floating of invention.Due to narrow space, underground Building foundation pit short of width 1m, it is difficult to ensure backfill construction quality, determine that composite geo-membrane is selected to be used as every infiltration layer 3, with true It protects every oozing effect, specific implementation method is：In hypogee, exterior wall 6 reserves 2 wall conduit of water outlet and exterior wall protrusion 15；Base Hole backfill is constructed in the following order from bottom to top：The backfilling of earthwork lower part soil layer 11 being excavated with place is to close to water outlet The absolute altitude of 2 conduits --- it backfills intermediate permeable ground 1 with medium coarse sand and is distributed to whole foundation pits backfills region, during this period saturating The a pair of parallel porous collector pipe 17,18 around hypogee is placed among water and soil layer 1 and is each communicated with lead to water outlet 2 and lead Pipe --- the backfilling of earthwork upper soil horizon 12 being excavated with place is to every 3 absolute altitude of infiltration layer --- is laid with covers whole bases every infiltration layer 3 Hole backfills region and extends to the impervious stratum 8 other than hypogee foundation pit boundary 4, sees Fig. 1 --- it is inserted into every infiltration layer one end 10 Within impervious stratum 8 other than the foundation pit of hypogee and press closely --- every the infiltration layer other end 9 along hypogee exterior wall 6 The lower section of item in exterior wall protrusion 15 is risen to, then builds brick wall 16 by laying bricks or stones on the outside and compresses sealing, sees Fig. 3 --- backfill surface soil layer 13 And complete various pipes installation；It is sealed service check every 3 all sealing positions of infiltration layer.

Hypogee during use, observe 2 substantially anhydrous outflow of water outlet, have a small amount of drop in heavy rain season once in a while Water, display composite geo-membrane is every oozing the fine every oozing effect of device.

Claims

1. a kind of anti-floating system of underground structure, underground structure include hypogee exterior wall (6), hypogee bottom plate (5), Hypogee top plate (7), the region between hypogee exterior wall (6) and hypogee foundation pit boundary (4) are that foundation pit backfills region, Hypogee bottom plate (5) is below impervious stratum (8) with the soil layer other than hypogee foundation pit boundary (4)；It is characterized in that： A level is constructed in foundation pit backfill area top every infiltration layer (3), it is described to cover whole foundation pits every infiltration layer (3) and backfill region； Foundation pit backfill region lower part constructs a permeable ground (1) and is connected to the identical water outlet (2) of at least two absolute altitudes, described permeable Soil layer (1) is full of whole foundation pits and backfills region in the horizontal direction.

2. a kind of anti-floating system of underground structure according to claim 1, it is characterised in that：The permeable ground (1) is at least Including fine sand, middle sand, gravelly sand, dust, circle gravel, rubble, cobble, block stone or erratic boulder；At least two absolute altitudes it is identical go out Lower ground, mine pit or pipe trench in the room of hypogee are led in the mouth of a river (2) across hypogee exterior wall (6).

3. a kind of anti-floating system of underground structure according to claim 1, it is characterised in that：In the permeable ground (1) It is laid at least two parallel porous collector pipes or water collector (17,18)；Between two collector pipes or water collector (17,18) Be not connected to directly mutually, the flow in two collector pipes or water collector (17,18) can only by two collector pipes or water collector (17, 18) hole of the permeable ground (1) between circulates to interact；The every collector pipe or water collector (17,18) respectively connect Lead at least one water outlet (2), water outlet (2) water filling thereto is observed whether another water outlet (2) drains, can be looked into It is whether unobstructed to the ground water drainage access between water outlet (2) to test the permeable ground (1).

4. wanting a kind of anti-floating system of 3 underground structure according to right, it is characterised in that：The every collector pipe or water collector (17,18) outer surface cladding is at least one layer of to cross filter mud, husky filter cloth or filter membrane.

5. a kind of ground water drainage access checking device of underground structure, underground structure include hypogee exterior wall (6), Lower building bottom plate (5), hypogee top plate (7), the region between hypogee exterior wall (6) and hypogee foundation pit boundary (4) Region is backfilled for foundation pit, hypogee bottom plate (5) is below impervious stratum with the soil layer other than hypogee foundation pit boundary (4) (8)；It is characterized in that：It is identical in a permeable ground (1) connection at least two absolute altitudes that foundation pit backfill region lower part is constructed Water outlet (2)；At least two parallel porous collector pipes or water collector (17,18) are laid in underground water-permeable soil layer (1)；It is described It is not connected to directly mutually between two collector pipes or water collector (17,18), the flow in two collector pipes or water collector (17,18) is only Circulation can be interacted by the hole of the permeable ground (1) between two collector pipes or water collector (17,18)；It is every described Collector pipe or water collector (17,18) each communicate at least one water outlet (2), thereto water outlet (2) water filling, and observation is another Whether one water outlet (2) drains, and can check the permeable ground (1) to the ground water drainage access between water outlet (2) is It is no unobstructed.