CN108914944A - Shoal high water level pipeline Support of Foundation Pit Excavation precipitation system and construction method - Google Patents
Shoal high water level pipeline Support of Foundation Pit Excavation precipitation system and construction method Download PDFInfo
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- CN108914944A CN108914944A CN201810843557.XA CN201810843557A CN108914944A CN 108914944 A CN108914944 A CN 108914944A CN 201810843557 A CN201810843557 A CN 201810843557A CN 108914944 A CN108914944 A CN 108914944A
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- filter plate
- stake
- water filter
- bar
- cross bar
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of shoal high water level pipeline Support of Foundation Pit Excavation precipitation system, including bar stake, bar stake is combined type, the drill bit of stake bar and front end including rear end, and drill bit is divided into threaded drill bit and straight nail type drill bit, according to different drill bits using drilling or ram into；Stake boom end is provided with pile protection head, and stake bar is connect by clip with cross bar；The water filter plate is inserted in inside of cross bar, carries out resistance sand filter water, and the flexible porous tube is embedded along the foundation pit side-wall hole bottom for setting integrate draining hole, ensures draining and the hole anhydrous construction in bottom；The monitoring pipe is connect with flexible porous tube, monitors the pollution condition of foundation pit underground water.The invention also discloses the construction methods of the shoal high water level pipeline Support of Foundation Pit Excavation precipitation system.The present invention has monitoring aquatic environment, and reduction is collapsed, and reduces drift sand；Keep Ground Settlement of Deep Foundation Pit caused by precipitation balanced；Ensure construction quality；The low feature of construction cost.
Description
Technical field
The present invention relates to a kind of Support of Foundation Pit Excavation precipitation systems, and in particular to a kind of shoal high water level pipeline excavation of foundation pit
Supporting precipitation system and construction method.
Background technique
As China's town site is more and more nervous, more and more, companion is developed close to riverine, coastal and beach area
It gradually increases with the excavation under high water level, sandy soil environment, is highlighted in face of new geological environment constructional difficulties point.
When shoal excavation of foundation pit, level of ground water is high, has abundant water resources, and large area drift sand easily occurs and the phenomenon that collapses, Wu Fashun
Benefit is excavated.Using Larsen steel sheet pile supporting, although sandy soil crater wall caused by lateral flowing water can be prevented to collapse, increase greatly
Side pressure is added, has dealt with Larsen steel sheet pile improperly and easily occur to squeeze skew back, increase well-points dewatering, and considerably increase supporting precipitation expense
With even resulting in the unbalanced part in periphery and settle danger greatly.
Therefore, seek in the case of a kind of small excavation face to reduce waterpower side pressure, balanced Ground Settlement of Deep Foundation Pit, supporting dewatering effect
Obviously, constructing operation is simple and reduces the system and construction method of cost, for maintenance ecological environment and reinforces economic development tool
There is important realistic meaning.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of shoal high water level pipeline Support of Foundation Pit Excavation
Precipitation system and construction method are mainly used for solving close to high water level sandy soil excavation of foundation pit such as riverine, coastal and beach areas
The difficult problem of supporting dewatering construction.
The invention is realized in this way：
A kind of shoal high water level pipeline Support of Foundation Pit Excavation precipitation system, including bar stake, pile protection head, clip, cross bar, drainage
Plate, flexible porous tube, monitoring pipe, the bar stake are combined type, the drill bit of stake bar and front end including rear end；Stake boom end setting
There is pile protection head, stake bar is connect by clip with cross bar；The water filter plate is inserted in inside of cross bar, carries out resistance sand filter water, described soft
Water-permeable pipe is embedded along the foundation pit side-wall hole bottom for setting integrate draining hole, ensures draining and the hole anhydrous construction in bottom；Monitoring pipe with it is soft
Water-permeable pipe connection, monitors the pollution condition of foundation pit underground water.
Further scheme is：
The stake bar is screwed on by spiral with drill bit and drive screw is added to fix, and the drill bit is divided into threaded drill bit and straight nail
Formula drill bit, according to different drill bit using drilling or ram into.
Further scheme is：
The clip includes the clip that screw rod fixing hoop and full clip are fixed；
Screw rod fixing hoop is arranged every 10~30cm to perforation in bar stake, sets gradually to perforation in right-angled intersection, if
Setting range is that stake top is 1/2~1/3 long to drill bit direction；
The fixed clip of full clip is that stake top is 1/2~1/3 long to drill bit direction without punching, setting range；
Lines and/or frosted processing, enhancing are set on remaining drill bit to the stake bar in stake top direction 1/2~2/3 on stake bar
Pile body and soil matrix bite force are with anticreep resistance to movement skew back.
Further scheme is：
When fixed using screw rod fixing hoop, then added among the cross bar to drawing screw rod to install fixed transverse rod,
To being equipped among drawing screw rod to perforation, both ends are set to spiral is drawn, and are facilitated and are adjusted rail bar member length, to drawing 2 side of screw rod
End spiral cross bar two-port is respectively provided with spiral；
When using full clip fixed clip, then building-supporting steel pipe is directly selected, is directly fixed by clip.
Further scheme is：
The pile protection head include driving pullover and ram pullover, driving pullover match with threaded drill bit, drive pullover and
Drilling driving axis connection.
Further scheme is：
The water filter plate length is 2~3m, including network folder film water filter plate, and plastic-steel water filter plate, dustpan water filter plate or steel plate sieve
Water filter plate.
Further scheme is：
The network folder film water filter plate includes water filter plate basket, punching block net, geotextiles, purlin, among water filter plate basket every 20~
30cm sets a vertical stay, cuts 2 punching block nets, one layer of folder and water filter plate basket among 2 punching block nets according to water filter plate basket size
The punching block net for clipping geotextiles is added self threading pin to be fixed on water filter plate basket, water filter plate basket by the identical geotextiles of size with purlin
It is identical material with purlin, can is aluminium alloy, stainless steel and other steel；Can on this basis upgrading at clipping soil
The punching block steel wire rack block of work cloth stretchable water filter plate substituted in water filter plate basket；
The plastic-steel water filter plate is made of the sandwiched filter screen of plastic-steel board centre；
The dustpan water filter plate is made of branch or bamboo cane braiding；
The steel plate sieve water filter plate is that close screen mesh formation is fixed on steel plate strip welding gridiron.
Further scheme is：
The flexible porous pipe outside diameter is 160mm, and position is cheated in integrate draining in the port of flexible porous tube after laying；
The monitoring pipe is 40mmPE pipe, and connection fixture block is being arranged with flexible porous tube junction, is protruding into flexible porous
Pipe one end is wrapped up using gauze, and with height, lid suitable for reading of jumping a queue is covered for length and backfill upper surface, is opened and is extracted when monitoring is drawn water.
The present invention also provides the construction methods of aforementioned shoal high water level pipeline Support of Foundation Pit Excavation precipitation system, specific to wrap
Include following steps：
Step 1, surveying and locating：Surveying and locating supporting excavation line excavates line width and adds two sides not less than 50cm not less than caliber；
Then spacing is set according to water filter plate length, measures simultaneously setting-out rod stake position, integrate draining hole is added in pipe well position, in pipe well
Between added integrate draining hole position.
Step 2, it creeps into or rams into bar stake：Bar stake is designed and selected according to cutting depth, is surveying the bar stake position set,
Underground has hard geological stratification that band auger head rod stake is used to creep into, and conventional stratum is rammed using weight into control using straight nail type bar stake
Embedded depth and stake top absolute altitude are made, bar stake embedded depth after excavation of foundation pit is not less than 1.5 times of foundation depth.
Step 3, channel excavation：Channel excavation is cheated from ditch trough rim integrate draining and pipe well position is excavated along trench line to both sides,
Stage excavation, every layer of 30~50cm of excavation, concrete foundation soil property situation determine that every layer of cutting depth is to be not easy large area after excavating
It collapses immediately preferably.
Step 4, cross bar clip is fixed：Organizing manpower after every layer of excavation immediately, progress cross bar clip in side is fixed in the trench；
The opening connecting with groove is cheated in individual integrate draining, the integrate draining pitted surface in trench backfill carries out cross bar clip and fixes.
Step 5, water filter plate is inserted into：After cross bar clip is fixed, first layer arranges people station in the trench by drainage after excavating
Plate is inserted between cross bar and crater wall, and water filter plate is made to touch slot bottom at this time；After every layer of excavation installs cross bar below, arranged in groove
One people strikes off cell wall guidance water filter plate and moves down, and arranges a people to follow a piece water filter plate closely again outside groove and is inserted into and pushes following drainage
Plate；The opening connecting with groove is cheated in individual integrate draining, the grooved surface in trench backfill is sequentially inserted into water filter plate.
Step 6, pump drainage water：After drain excavates and a large amount of ponding occurs, replaced according to measuring and calculating and rationally dynamic different
Suction pump, guarantee carry out the channel excavation along trench line to both sides in pump drainage without a large amount of ponding, and pump drainage is until trench backfill is complete
Discharge puddle backfill after.
Step 7, manual cleaning substrate：Channel excavation uses manual cleaning from substrate about 15~20cm, and substrate is laterally to setting
2~3% downward slope is repaired in the cell wall side for having integrate draining to cheat, and gutter is arranged at the cell wall side group bottom for being equipped with integrate draining hole,
Pump drainage dry substrate.
Step 8, flexible porous tube is buried：Flexible porous tube is buried along the cell wall side group bottom for being equipped with integrate draining hole, it is embedded to make
It is backfilled to tube bottom absolute altitude with design Guan Ji (rubble) material, embedded preceding flexible porous tube needs to draw straight.
Step 9：Pipeline is laid with, installs monitoring pipe：It is soft by pipe joint position after pipeline is laid along groove middle line
Monitoring pipe is installed on water-permeable pipe, to run phase sampling observation water monitoring pipe leakage situation.
Step 10：Trench backfill, cross bar are removed and lifting water filter plate：Pipeline backfill answers both sides symmetrically to be backfilled, and backfills
Process monitoring pipe surrounding answers righting manual compaction, and cross bar is removed after trench backfill to cross bar position and lifts water filter plate and so far backfills
Finished surface is compacted, and successively carries out such operation until cross bar is all removed and water filter plate is completely drawn out, trench backfill is compacted
It completes.
Step 11：The backfill of integrate draining hole, cross bar are removed and lifting water filter plate：Integrate draining hole is carried out after the completion of trench backfill
Backfill, surrounding cross bar is removed and the lifting same trench backfill of water filter plate in backfilling process, until the backfill of integrate draining hole is completed.
Step 12：Drawing or derotation, which are bored, promotes rod stake, tamps stake holes：According to different bar stakes, band auger head rod stake
It is bored using derotation and promotes rod stake, straight nail type bar stake direct drawing takes out, and then tamps stake using rough sand, sand gravel or rubble
Hole.
The present invention uses filter sand plate, takes out dress conveniently, effectively reduces water pressure, drift sand is stopped to collapse, forms water conservancy diversion curtain wall,
Surface subsidence caused by Hengshui drops effectively avoids destroying caused by differential settlement；The bar stake that the present invention uses has lines, increases
With the binding force of sandy soil, drill bit is detachable and interchangeable, according to drill bit difference can take respectively drilling and weight ram into method；Card
It binds round various informative, is completely embedded, it can effective non-skid；Cross bar is different according to clip mode, and cross bar type multiplicity, materials are just
Benefit, while backfill depth every time can have been controlled well；Excavation of foundation pit failure mechanics are small, supporting precipitation less investment, and effect is obvious；System
It unites widely applicable, chosen material can repeatedly be had enough to meet the need, and it is easy to operate, it is lost small；Side wall water flow is eliminated from substrate counter-pressure, reduces hole
Bottom, which is turned over, gushes, and flow guide system ensures that pump drainage supplies well, filters fine sand, reduces water pump and blocks the risk burnt；Flexible porous tube
Use can be very good drainage collect, be convenient for pump drainage, colleague can be used as dirt let out water intaking monitoring water intaking space；The system to collect
Water is bright to be come using becoming feasible in high water level sandy soil excavation of foundation pit, and system constitutes complete, stable structure, safe and reliable.
Beneficial effects of the present invention are mainly：The present invention has monitoring aquatic environment, reduces environmental disruption face；Reduction collapses
It collapses, reduces drift sand, filter sand water purification of constructing ensures the safe and smooth operation of water pump；Keep Ground Settlement of Deep Foundation Pit caused by precipitation balanced, drop
The danger of periphery auxiliary building bring is given in low unbalanced sedimentation；Control backfill depth very well；Ensure construction quality；System structure letter
Single, material is easy to choose, easy to operate, reduces the side pressure of foundation pit waterpower, and stable structure, supporting effect is obvious, ensures construction safety,
Construction cost is low, and this system is may be used in the soil property environment excavation of foundation pit of other rich groundwaters simultaneously, widely applicable, changes
Traditional method, to catchment bright come in high water level sand soil with mentioning for shoal pipeline excavation
For the supporting precipitation system and construction method of a kind of stable safety.
Detailed description of the invention
Fig. 1 is the network folder membrane filtration water plate structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the plastic-steel water filter plate structural schematic diagram of the embodiment of the present invention；
Fig. 3 is the dustpan water filter plate structural schematic diagram of the embodiment of the present invention；
Fig. 4 is the steel plate sieving water plate structural schematic diagram of the embodiment of the present invention；
Fig. 5 is the supporting skeleton schematic diagram of the embodiment of the present invention；
Fig. 6 is the supporting precipitation system schematic diagram of the embodiment of the present invention；
Fig. 7 is the supporting precipitation system schematic top plan view of the embodiment of the present invention.
Wherein, 1-network folder film water filter plate, 1-1-water filter plate basket, 1-2-punching block net, 1-3-geotextiles, 1-4-purlin,
1-5-self threading pin, 2-plastic-steel water filter plates, 2-1-plastic-steel board, 2-2-filter screen, 3- dustpan water filter plate, 4- steel plate sieving water
The straight nail type drill bit of plate, 5-stake bars, 6-drill bits, 6-1-, 6-2-band augers, 7-pile protection heads, 7-1-driving pullover, 7-
2-ram pullovers, 8-clips, 8-1-full card even clip, 8-2-screw rod fixing hoop, 9-cross bars, 9-1-to draw screw rod,
9-2-end spiral cross bar, 9-3- supporting steel pipe, 10-flexible porous tubes, 11-connection fixture blocks, 12-monitoring pipes, 13-pipelines,
14-integrate drainings hole, 15-pipe wells
Specific embodiment
The present invention is further illustrated in the following with reference to the drawings and specific embodiments.
As shown in attached drawing 1 to 7, a kind of shoal high water level pipeline Support of Foundation Pit Excavation precipitation system, it is characterised in that：
(1) the bar stake described in is combined type, includes stake bar 5 and drill bit, drill bit is divided into threaded drill bit 6-2 and straight nail type is bored
Two kinds of 6-1 of head, band augers 6-2 band auger line, straight nail type drill bit 6-1 pass through spiral shell without auger line, stake bar 5 and drill bit
It is screwed on and drive screw is added to fix；Stake bar 5, need to be in bar stake every 10 using the fixed clip of screw rod according to the difference of clip form
~30cm setting sets gradually perforation to the horizontal perpendicular right-angled intersection of perforation one, setting range be stake top to drill bit direction 1/2~
It is 1/3 long, using the fixed clip of full clip without punching, line is set to stake top direction is 1/2~2/3 long for remaining drill bit
Road and frosted processing, enhancing pile body and soil matrix bite force are with anticreep resistance to movement skew back.
(2) the pile protection head 7 described in is different for different bar stakes, adds connection drilling for band augers 6-2 bar stake
The driving pullover 7-1 of drive shaft, pullover are fixed in bar stake using bolt；The rammer set in heavy tamping face is added for straight nail type bar stake
Head 7-2, reduces damage when ramming to bar stake.
(3) clip described in can be one end using the stake of screw rod bar, fixed transverse rod mouth band there are many design and selection
The screw rod fixing hoop 8-2 of screw thread is also possible to the fixed full card of full clip even clip 8-1 etc., and the design alternative of clip needs to protect
The bar stability of card hoop securely can simultaneously be no less than 150kN push-pull effort.
(4) water filter plate described in can there are many designs and selection：As shown in Fig. 1, a kind of network folder membrane filtration water can be used
Plate 1 includes water filter plate basket 1-1, punching block net 1-2, geotextiles 1-3, purlin 1-4, and water filter plate basket 1-1 size is standardized design,
Basket is intermediate to set a vertical stay every 20~30cm, cuts punching block net 1-2 2,2 punching block nets according to water filter plate basket 1-1 size
The geotextiles 1-3 of one layer of water filter plate basket 1-1 size of folder, is added the punching block net 1-2 for clipping geotextiles 1-3 with purlin 1-4 among 1-2
Self threading pin 1-5 is fixed on water filter plate basket 1-1, and water filter plate basket 1-1 and purlin 1-4 are identical material, can be aluminium alloy, stainless
Other steel of steel etc.；Can on this basis upgrading at clipping the punching block net 1-2 pellet of geotextiles 1-3 framed stretchable
The water filter plate substituted.Can also be as shown in Fig. 2, plastic-steel water filter plate 2 is made using sandwiched filter screen 2-2 among plastic-steel board 2-1.
It is also possible to the dustpan water filter plate 3 of branch or bamboo cane braiding, as shown in Fig. 3.It is also possible to fixed on steel plate strip welding gridiron
The steel plate that close screen mesh is formed sieves water filter plate 4, as shown in Fig. 4, etc..Each plate is as needed, card slot can be arranged in lower frame
To guarantee that overlaying a plane when using does not slip dislocation, water filter plate length is easily 2~3m, and concrete foundation needs to design ruler
It is very little.
(5) cross bar is fixed among then cross bar according to screw rod fixing hoop 8-2 and is added to drawing screw rod 9-1 to pacify
Fixed transverse rod is filled, is equipped among screw rod 9-1 to drawing to perforation, both ends are set to spiral is drawn, and are facilitated and are adjusted rail bar member length, right
The end spiral cross bar 9-2 two-port on the side screw rod 9-12 is drawn to be respectively provided with spiral；Building is then directly selected according to full clip is fixed
Supporting steel pipe 9-3, direct clip are fixed.
(6) flexible porous tube 10 described in is the finished product of market purchase, and outer diameter is 160mm, and laying needs to be straightened taut
Tightly, if 14 positions are cheated in integrate draining in port, base underground water is drained into integrate draining and cheats 14 pump drainages.
(7) the monitoring pipe 12 described in is the 40mmPE pipe of market purchase, is connected being arranged with 10 junction of flexible porous tube
Fixture block 11 is protruded into 10 one end of flexible porous tube and is wrapped up using gauze, and with height, lid suitable for reading of jumping a queue is covered for length and backfill upper surface,
It opens and extracts when monitoring is drawn water.
As a specific embodiment of the invention, the present invention also provides aforementioned shoal high water level pipeline excavation of foundation pit branch
The construction method for protecting precipitation system, specifically comprises the following steps：
Step 1, surveying and locating：Surveying and locating supporting excavation line excavates line width and adds two sides not less than 50cm not less than caliber；
Then spacing is set according to water filter plate length, measures simultaneously setting-out rod stake position, add integrate draining hole 14 in 15 position of pipe well,
Integrate draining has been added between pipe well 15 cheats 14 positions.
Step 2, it creeps into or rams into bar stake：Bar stake is designed and selected according to cutting depth, is surveying the bar stake position set,
Underground have hard geological stratification use band augers 6-2 bar stake creep into, conventional stratum using straight nail type bar stake using weight ram into,
Embedded depth and stake top absolute altitude are controlled, bar stake embedded depth after excavation of foundation pit is not less than 1.5 times of foundation depth.
Step 3, channel excavation：Channel excavation is opened along trench line to both sides from ditch trough rim integrate draining hole 14 and 15 position of pipe well
It digs, stage excavation, every layer of 30~50cm of excavations, concrete foundation soil property situation determines, every layer of cutting depth is to be not easy after excavating greatly
Area collapses preferably immediately.
Step 4, cross bar clip is fixed：Organizing manpower after every layer of excavation immediately, progress cross bar clip in side is fixed in the trench；
In the opening that individual integrate draining hole 14 is connect with groove, it is solid that the integrate draining in trench backfill cheats 14 faces progress cross bar clip
It is fixed.
Step 5, water filter plate is inserted into：After cross bar clip is fixed, first layer arranges people station in the trench by drainage after excavating
Plate is inserted between cross bar and crater wall, and water filter plate is made to touch slot bottom at this time；After every layer of excavation installs cross bar below, arranged in groove
One people strikes off cell wall guidance water filter plate and moves down, and arranges a people to follow a piece water filter plate closely again outside groove and is inserted into and pushes following drainage
Plate；In the opening that individual integrate draining hole 14 is connect with groove, the grooved surface in trench backfill is sequentially inserted into water filter plate.
Step 6, pump drainage water：After drain excavates and a large amount of ponding occurs, replaced according to measuring and calculating and rationally dynamic different
Suction pump, guarantee carry out the channel excavation along trench line to both sides in pump drainage without a large amount of ponding, and pump drainage is until trench backfill is complete
Discharge puddle backfill after.
Step 7, manual cleaning substrate：Channel excavation uses manual cleaning from substrate about 15~20cm, and substrate is laterally to setting
There is the cell wall side in integrate draining hole 14 to repair 2~3% downward slope, and draining is set at the cell wall side group bottom for being equipped with integrate draining hole 14
Ditch, pump drainage dry substrate.
Step 8, flexible porous tube 10 is buried：Flexible porous tube 10 is buried along the cell wall side group bottom for being equipped with integrate draining hole 14,
Embedded to be backfilled to tube bottom absolute altitude using design Guan Ji (rubble) material, embedded preceding flexible porous tube 10 needs to draw straight.
Step 9：Pipeline is laid with, installs monitoring pipe 12：After pipeline 13 is laid along groove middle line, by pipe joint position
Monitoring pipe 12 is installed on flexible porous tube 10, to run phase sampling observation 12 leakage scenarios of water monitoring pipe.
Step 10：Trench backfill, cross bar are removed and lifting water filter plate：Pipeline backfill answers both sides symmetrically to be backfilled, and backfills
Process monitoring pipe surrounding answers righting manual compaction, and cross bar is removed after trench backfill to cross bar position and lifts water filter plate and so far backfills
Finished surface is compacted, and successively carries out such operation until cross bar is all removed and water filter plate is completely drawn out, trench backfill is compacted
It completes.
Step 11：14 backfill of integrate draining hole, cross bar are removed and lifting water filter plate：Integrate draining is carried out after the completion of trench backfill
14 backfill is cheated, the same trench backfill of water filter plate is removed and lifted to surrounding cross bar in backfilling process, until integrate draining hole 14 has backfilled
At.
Step 12：Drawing or derotation, which are bored, promotes rod stake, tamps stake holes：According to different bar stakes, band augers 6-2 bar
Stake is bored using derotation promotes rod stake, and straight nail type bar stake direct drawing takes out, and then tamps stake using rough sand, sand gravel or rubble
Hole.
The present invention is put by 1) setting for cross bar position, controls trench backfill paving thickness very well；2) setting of pipe is monitored
Good leakage monitoring situation, avoids practise fraud well, ensured the construction quality of concealed work；3) material used
Simply, system structure is simple, low using price, easy to operate；4) it has ensured the uniform settlement because after underground water pump drainage, has avoided
Differential settlement gives periphery auxiliary building bring dangerous；5) system is good to the filter effect of sandy soil, has ensured clear water pump drainage,
Reduce water pump and blocks the danger burnt；6) this system applies also for changing traditional method in other Support of Foundation Pit Excavation, so that
It catchments bright come in high water level sand soil with being possibly realized.
Claims (9)
1. a kind of shoal high water level pipeline Support of Foundation Pit Excavation precipitation system, it is characterised in that including bar stake, pile protection head, clip,
Cross bar, water filter plate, flexible porous tube, monitoring pipe, the bar stake are combined type, the drill bit of stake bar and front end including rear end, stake
Boom end is provided with pile protection head, and stake bar is connect by clip with cross bar；The water filter plate is inserted in inside of cross bar, described flexible porous
Pipe is embedded along the foundation pit side-wall hole bottom for setting integrate draining hole, and the monitoring pipe is connect with flexible porous tube.
2. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 1, it is characterised in that：
The stake bar is screwed on by spiral with drill bit and drive screw is added to fix, and the drill bit is divided into threaded drill bit and straight nail type is bored
Head.
3. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 1, it is characterised in that：
The clip includes the clip that screw rod fixing hoop and full clip are fixed；
Screw rod fixing hoop is arranged every 10~30cm to perforation in bar stake, sets gradually to perforation in right-angled intersection, model is arranged
It encloses 1/2~1/3 long to drill bit direction for stake top；
The fixed clip of full clip is that stake top is 1/2~1/3 long to drill bit direction without punching, setting range；
Lines and/or frosted processing are set on remaining drill bit to the stake bar in stake top direction 1/2~2/3 on stake bar.
4. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 3, it is characterised in that：
When fixed using screw rod fixing hoop, then added among the cross bar to drawing screw rod to install fixed transverse rod, to drawing
It is equipped among screw rod to perforation, both ends are set to spiral is drawn, and are facilitated and are adjusted rail bar member length, to the end spiral shell for drawing 2 side of screw rod
Rotation cross bar two-port is respectively provided with spiral；
When using full clip fixed clip, then building-supporting steel pipe is directly selected, is directly fixed by clip.
5. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 1, it is characterised in that：
The pile protection head includes driving pullover and rams pullover, and driving pullover matches with threaded drill bit, driving pullover and drilling
Drive axis connection.
6. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 1, it is characterised in that：
The water filter plate length is 2~3m, including network folder film water filter plate, plastic-steel water filter plate, dustpan water filter plate or steel plate sieving water
Plate.
7. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 6, it is characterised in that：
The network folder film water filter plate includes water filter plate basket, punching block net, geotextiles, purlin, every 20~30cm among water filter plate basket
If a vertical stay, 2 punching block nets, one layer of folder and water filter plate basket size among 2 punching block nets are cut according to water filter plate basket size
The punching block net for clipping geotextiles is added self threading pin to be fixed on water filter plate basket, water filter plate basket and purlin by identical geotextiles with purlin
Item is identical material, can be aluminium alloy, stainless steel and other steel；Can on this basis upgrading at clipping geotextiles
Punching block steel wire rack block in water filter plate basket the stretchable water filter plate substituted；
The plastic-steel water filter plate is made of the sandwiched filter screen of plastic-steel board centre；
The dustpan water filter plate is made of branch or bamboo cane braiding；
The steel plate sieve water filter plate is that close screen mesh formation is fixed on steel plate strip welding gridiron.
8. shoal high water level pipeline Support of Foundation Pit Excavation precipitation system according to claim 1, it is characterised in that：
The flexible porous pipe outside diameter is 160mm, and position is cheated in integrate draining in the port of flexible porous tube after laying；
The monitoring pipe is 40mmPE pipe, and connection fixture block is being arranged with flexible porous tube junction, is protruding into flexible porous tube one
End is wrapped up using gauze, and with height, lid suitable for reading of jumping a queue is covered for length and backfill upper surface, is opened and is extracted when monitoring is drawn water.
9. the construction of shoal high water level pipeline Support of Foundation Pit Excavation precipitation system described in claim 1 to 8 any claim
Method, it is characterised in that include the following steps：
Step 1, surveying and locating：Surveying and locating supporting excavation line excavates line width and adds two sides not less than 50cm not less than caliber；Then
Spacing is set according to water filter plate length, measures simultaneously setting-out rod stake position, integrate draining hole is added in pipe well position, between pipe well
Integrate draining hole position is added；
Step 2, it creeps into or rams into bar stake：Bar stake is designed and selected according to cutting depth, in the bar stake position that survey is set, in underground
There is hard geological stratification that band auger head rod stake is used to creep into, conventional stratum is rammed using weight into controlling using straight nail type bar stake
Embedded depth and stake top absolute altitude, bar stake embedded depth after excavation of foundation pit are not less than 1.5 times of foundation depth；
Step 3, channel excavation：Channel excavation is cheated from ditch trough rim integrate draining and pipe well position is excavated along trench line to both sides, layering
It excavates, every layer of 30~50cm of excavations, the determination of concrete foundation soil property situation, every layer of cutting depth is to be not easy large area immediately after excavating
It collapses preferably；
Step 4, cross bar clip is fixed：Organizing manpower after every layer of excavation immediately, progress cross bar clip in side is fixed in the trench；In list
Only integrate draining cheats the opening connecting with groove, and the integrate draining pitted surface in trench backfill carries out cross bar clip and fixes；
Step 5, water filter plate is inserted into：After cross bar clip is fixed, first layer arranges people station in the trench to insert water filter plate after excavating
Enter between cross bar and crater wall, water filter plate is made to touch slot bottom at this time；After every layer of excavation installs cross bar below, a people is arranged in groove
It strikes off cell wall guidance water filter plate to move down, arranges a people to follow a piece water filter plate closely again outside groove and be inserted into and push following water filter plate；
The opening connecting with groove is cheated in individual integrate draining, the grooved surface in trench backfill is sequentially inserted into water filter plate；
Step 6, pump drainage water：After drain excavates and a large amount of ponding occurs, difference is replaced according to measuring and calculating and rationally dynamic and is drawn water
Pump, guarantee carry out the channel excavation along trench line to both sides in pump drainage without a large amount of ponding, and pump drainage is until after the completion of trench backfill
Discharge puddle backfill；
Step 7, manual cleaning substrate：Channel excavation uses manual cleaning from substrate about 15~20cm, and substrate is laterally to equipped with collection
2~3% downward slope is repaired in the cell wall side of drain, and gutter is arranged at the cell wall side group bottom for being equipped with integrate draining hole, and pump drainage is dry
Substrate；
Step 8, flexible porous tube is buried：Flexible porous tube is buried along the cell wall side group bottom for being equipped with integrate draining hole, embedded use is set
Meter pipe sill is backfilled to tube bottom absolute altitude, and embedded preceding flexible porous tube needs to draw straight；
Step 9：Pipeline is laid with, installs monitoring pipe：It is flexible porous by pipe joint position after pipeline is laid along groove middle line
Monitoring pipe is installed on pipe, to run phase sampling observation water monitoring pipe leakage situation；
Step 10：Trench backfill, cross bar are removed and lifting water filter plate：Pipeline backfill answers both sides symmetrically to be backfilled, backfilling process
Monitoring pipe surrounding answers righting manual compaction, and cross bar is removed after trench backfill to cross bar position and lifts water filter plate and so far backfills completion
Face is compacted, and successively carries out so operation until cross bar is all removed and water filter plate is completely drawn out, trench backfill compacting is completed；
Step 11：The backfill of integrate draining hole, cross bar are removed and lifting water filter plate：Returning for integrate draining hole is carried out after the completion of trench backfill
It fills out, the same trench backfill of water filter plate is removed and lifted to surrounding cross bar in backfilling process, until the backfill of integrate draining hole is completed；
Step 12：Drawing or derotation, which are bored, promotes rod stake, tamps stake holes：According to different bar stakes, band auger head rod stake is used
Derotation, which is bored, promotes rod stake, and straight nail type bar stake direct drawing takes out, and then tamps stake holes using rough sand, sand gravel or rubble.
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| CN110644514A (en) * | 2019-08-22 | 2020-01-03 | 中国十七冶集团有限公司 | Drainage method for large box type foundation and post-cast strip |
| CN112227499A (en) * | 2020-10-24 | 2021-01-15 | 安徽宸昊工程设计有限公司 | Municipal drainage pipeline construction technology |
| CN113737822A (en) * | 2021-08-23 | 2021-12-03 | 中国一冶集团有限公司 | Assembled guard plate suitable for weathered rock area and construction method thereof |
| CN115125976A (en) * | 2022-07-11 | 2022-09-30 | 河南大学 | Civil construction foundation pit drainage structure and construction method thereof |
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