CN107130622A - Pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method - Google Patents
Pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method Download PDFInfo
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- CN107130622A CN107130622A CN201710401674.6A CN201710401674A CN107130622A CN 107130622 A CN107130622 A CN 107130622A CN 201710401674 A CN201710401674 A CN 201710401674A CN 107130622 A CN107130622 A CN 107130622A
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- precipitation hole
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- 238000001556 precipitation Methods 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229920003023 plastic Polymers 0.000 claims abstract description 65
- 239000004033 plastic Substances 0.000 claims abstract description 65
- 230000037452 priming Effects 0.000 claims abstract description 52
- 239000002689 soil Substances 0.000 claims abstract description 30
- 238000013517 stratification Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 238000010276 construction Methods 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 241001365789 Oenanthe crocata Species 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011799 hole material Substances 0.000 description 67
- 239000004576 sand Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
Classifications
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- 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 pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method, solve the conventional precipitation method in pool under the conditions of gushing sandy ground matter and there is the problem of dewatering effect is poor.It is included in pool（1）Lower section be provided with chiltern geological stratification（10）, in pool（1）In be backfilled with rectangle soil property and build island（2）, island is built in rectangle soil property（2）Center be provided with pre- digging foundation ditch（12）, built in the rectangle soil property dug in advance around foundation ditch and spaced apart inner ring precipitation hole be respectively arranged with island（11）With spaced apart outer ring precipitation hole, inner ring precipitation hole is rectangular to be laid, and outer ring precipitation hole is also rectangular to be laid, and PPR plastics downcomers are plugged with each precipitation hole（3）, vacuum self priming pump is connected with downcomer, by taking height Interleaved control downcomer bottom absolute altitude and the inside and outside hole position that is equidistantly laid staggeredly to realize omnibearing stereo precipitation.It is particularly suitable for the foundation ditch that area is smaller, digging depth is shallower and tighter the duration to perform.
Description
Technical field
The present invention relates to a kind of precipitation system, more particularly to one kind gushes pool Bridge cushion cap foundation ditch point under the conditions of sandy ground matter
Area's vacuum precipitation system and precipitation method.
Background technology
In Bridge Construction, bridge line alignment is frequently necessary to pass through pool, and pool understratum is present sometimes
Layer of sand, category gushes sand geological conditions, in the pool of this geological conditions during construction bridges cushion cap, before cushion cap excavation of foundation pit, typically
Be that cofferdam is carried out to the pre- foundation ditch that digs using steel sheet pile, then draw water, excavate the earthwork in cofferdam, after the completion of carry out cushion cap and perform, this
The method of kind can expend substantial amounts of steel, and need large-scale special-purpose steel sheet pile to beat order equipment construction, and cost is very high.Also have in site operation
Using well-point dewatering method, multiple precipitation well points are set around foundation ditch, level of ground water are down to below excavation absolute altitude, in order to keep away
Exempt from deep foundation pit slope to cave in, excavation slope is needed to carry out combined bolting and shotcrete, then carries out cheating interior basic operation, this Foundation treatment
Method is relatively more suitable for super large and deeper foundation ditch, is not suitable for that bridge bearing platform homalographic is smaller and the shallower foundation ditch of cutting depth；
Because the bridge bearing platform foundation ditch activity duration is shorter, using the method for conventional base pit dewatering, there is precipitation speed slowly, cost is high, week
Phase length and to the high defect of vavuum pump power requirement of drawing water；Particularly in pool under the conditions of gushing sandy ground matter, conventional precipitation method
There can be Short-term Precipitation effect poor, the problem of required vavuum pump power requirement that draws water is big.
The content of the invention
The invention provides a kind of pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method, solve
Gush under the conditions of sandy ground matter that conventional precipitation method has the technical problem of dewatering effect difference in a short time in pool.
The present invention is to solve above technical problem by the following technical programs：
A kind of bridge bearing platform foundation ditch subregion vacuum precipitation system in pool, including pool, are provided with chiltern below pool
Geological stratification, rectangle soil property is backfilled with pool and builds island, and the center for building island in rectangle soil property is provided with pre- digging foundation ditch, and base is being dug in advance
Rectangle soil property around hole, which is built, is respectively arranged with staggeredly spaced apart inner ring precipitation hole and spaced apart outer ring precipitation on island
Hole, inner ring precipitation hole is rectangular to lay, and outer ring precipitation hole is also rectangular to lay, and inner ring precipitation hole is that interval is handed over outer ring precipitation hole
What mistake was laid, the PPR plastics drop of grafting in PPR plastics downcomers, left bank inner ring precipitation hole is plugged with each precipitation hole
The PPR plastics downcomer of grafting is connected together with inner ring lower-left communicating pipe in water pipe and lower row's inner ring precipitation hole, in inner ring
Inner ring lower-left fairlead is connected with the communicating pipe of lower-left, the other end and the inner ring lower-left vacuum self priming pump of inner ring lower-left fairlead connect
Lead to together；In right row's inner ring precipitation hole in the PPR plastics downcomer of grafting and upper row's inner ring precipitation hole grafting PPR plastics drop
Water pipe is connected together with inner ring upper right communicating pipe, and inner ring upper right communicating pipe is connected together with inner ring upper right fairlead, interior
The other end of circle upper right fairlead is connected together with inner ring upper right vacuum self priming pump；The PPR of grafting in the precipitation hole of left bank outer ring
The PPR plastics downcomer of grafting is connected together with outer ring upper left communicating pipe in plastics downcomer and upper exclusive circle precipitation hole,
Outer ring upper left communicating pipe is connected together with outer ring upper left fairlead, the other end and the outer ring upper left vacuum of outer ring upper left fairlead
Self priming pump is connected together；The PPR plastics downcomer of grafting grafting in exclusive circle precipitation hole with in right exclusive circle precipitation hole
PPR plastics downcomer is connected together with outer ring bottom right communicating pipe, and outer ring bottom right communicating pipe connects with outer ring bottom right fairlead
Together, the other end of outer ring bottom right fairlead is connected together with outer ring bottom right vacuum self priming pump；The bottom of PPR plastics downcomers
Port is arranged on the lower section of chiltern geological stratification, and closing cap is provided with the bottom nozzle of PPR plastics downcomers, in PPR plastics drop
Inlet opening is provided with the tube wall of water pipe bottom, screen pack is provided with inlet opening.
PPR plastics downcomers are inserted into the depth depth 2-3 that the depth ratio that rectangle soil property built in the soil layer on island digs foundation ditch in advance
Rice；On the tube wall of PPR plastics downcomers for passing through chiltern geological stratification, the water inlet of encryption is provided with.
The bottom of each PPR plastics downcomer is laid staggeredly in height, and difference of height is 1.5-2.0 meters.
A kind of bridge bearing platform foundation ditch subregion vacuum precipitation method in pool, comprises the following steps：
The first step, carry out construction with artificial island in pool, form rectangle soil property and build island, build to release on island in rectangle soil property and pre- dig foundation ditch
Excavation line；；
Second step, in advance dig foundation ditch around, precipitation hole is performed with iron pipe, is concretely comprised the following steps：The top ports of iron pipe are passed through into pressure
Power water pipe is connected together with water pump, opens water pump, water with pressure is injected into by iron pipe in the precipitation hole performed, make iron pipe pipe
The soil layer particle at bottom is loosened, and is shoved upwards along the outside tube wall of iron pipe, and iron pipe is pushed by the handle on iron pipe top, until deep
Degree reaches the precipitation depth of design, extracts iron pipe, completes performing for precipitation hole, and PPR modelings are then inserted in the precipitation hole of completion
Expect downcomer；
3rd step, the rectangle soil property around digging foundation ditch in advance are built and spaced apart inner ring precipitation hole are set on island and spaced apart
Outer ring precipitation hole, inner ring precipitation hole is laid with outer ring precipitation hole interleaved, and inserts in each precipitation hole a PPR modeling
Expect downcomer；
4th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in left bank inner ring precipitation hole and lower row's inner ring precipitation hole
Material downcomer is connected together with inner ring lower-left communicating pipe, and inner ring lower-left vacuum self priming pump is connected on the communicating pipe of inner ring lower-left,
Start inner ring lower-left vacuum self priming pump, carry out uninterrupted operation of drawing water；
5th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in right row's inner ring precipitation hole and upper row's inner ring precipitation hole
Material downcomer is connected together with inner ring upper right communicating pipe, and inner ring upper right vacuum self priming pump is connected on inner ring upper right communicating pipe,
Start inner ring upper right vacuum self priming pump, carry out uninterrupted operation of drawing water；
6th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in the precipitation hole of left bank outer ring and upper exclusive circle precipitation hole
Material downcomer is connected together with outer ring upper left communicating pipe, and outer ring upper left vacuum self priming pump is connected on the communicating pipe of outer ring upper left,
Start outer ring upper left vacuum self priming pump, carry out uninterrupted operation of drawing water；
7th step, by the PPR plastics downcomer of grafting in right exclusive circle precipitation hole and under in exclusive circle precipitation hole the PPR of grafting mould
Material downcomer is connected together with outer ring bottom right communicating pipe, and outer ring bottom right vacuum self priming pump is connected on the communicating pipe of outer ring bottom right,
Start outer ring bottom right vacuum self priming pump, carry out uninterrupted operation of drawing water；
8th step, when precipitation is to design attitude, excavate it is pre- dig foundation ditch, carry out bridge bearing platform and pier shaft performed, in cushion cap and pier
During body is performed, outer ring upper left vacuum self priming pump and outer ring bottom right vacuum self priming pump stop pumping operation, inner ring lower-left vacuum
Self priming pump and inner ring upper right vacuum self priming pump still provide for operation of uninterruptedly drawing water；
9th step, remove when pier body formwork, pre- to dig after the completion of foundation ditch backfill, inner ring lower-left vacuum self priming pump and inner ring upper right vacuum
Self priming pump stops pumping operation.
Scene materials of the invention are easy, easy to operate, and it is short to perform the cycle, are particularly suitable for that area is smaller, dig deep shallower and work
Phase tighter foundation ditch is performed.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation that precipitation hole 11 is performed with iron pipe 6 of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
A kind of bridge bearing platform foundation ditch subregion vacuum precipitation system in pool, including pool 1, sand is provided with the lower section in pool 1
Matter geological stratification 10, rectangle soil property is backfilled with pool 1 and builds island 2, and the center for building island 2 in rectangle soil property is provided with pre- digging foundation ditch
12, built in the rectangle soil property dug in advance around foundation ditch 12 and spaced apart inner ring precipitation hole 11 and interval cloth are respectively arranged with island 2
The outer ring precipitation hole put, inner ring precipitation hole 11 is rectangular to lay, and outer ring precipitation hole is also rectangular to lay, inner ring precipitation hole 11 with it is outer
Circle precipitation hole is that interleaved is laid, and PPR plastics downcomer 3, left bank inner ring precipitation hole are plugged with each precipitation hole
In the PPR plastics downcomer of interior grafting and lower row's inner ring precipitation hole the PPR plastics downcomer of grafting with inner ring lower-left communicating pipe 4
It is connected together, inner ring lower-left fairlead 13, the other end of inner ring lower-left fairlead 13 is connected with inner ring lower-left communicating pipe 4
It is connected together with inner ring lower-left vacuum self priming pump 5；The PPR plastics downcomer and upper row's inner ring of grafting in right row's inner ring precipitation hole
The PPR plastics downcomer of grafting in precipitation hole is connected together with inner ring upper right communicating pipe 22, inner ring upper right communicating pipe 22 with
Inner ring upper right fairlead 18 is connected together, and the other end of inner ring upper right fairlead 18 is connected with inner ring upper right vacuum self priming pump 19
Together；The PPR plastics downcomer of grafting and the upper exclusive PPR plastics precipitation for enclosing grafting in precipitation hole in the precipitation hole of left bank outer ring
Guan Junyu outer rings upper left communicating pipe 20 is connected together, and outer ring upper left communicating pipe 20 is connected one with outer ring upper left fairlead 14
Rise, the other end and the outer ring upper left vacuum self priming pump 15 of outer ring upper left fairlead 14 are connected together；In right exclusive circle precipitation hole
The PPR plastics downcomer of grafting and under in exclusive circle precipitation hole grafting PPR plastics downcomer with outer ring bottom right communicating pipe 21
Be connected together, outer ring bottom right communicating pipe 21 is connected together with outer ring bottom right fairlead 16, outer ring bottom right fairlead 16 it is another
One end is connected together with outer ring bottom right vacuum self priming pump 17；The bottom nozzle of PPR plastics downcomer 3 is arranged on chiltern geological stratification 10
Lower section, be provided with closing cap on the bottom nozzle of PPR plastics downcomer 3, set on the tube wall of the bottom of PPR plastics downcomer 3
Inlet opening is equipped with, screen pack is provided with inlet opening.
PPR plastics downcomer 3 be inserted into the depth ratio that rectangle soil property built in the soil layer on island 2 dig in advance foundation ditch 12 depth it is deep
2-3 meters；On the tube wall of PPR plastics downcomer 3 for passing through chiltern geological stratification 10, the water inlet of encryption is provided with.
The bottom of each PPR plastics downcomer 3 is laid staggeredly in height, and difference of height is 1.5-2.0 meters.
A kind of bridge bearing platform foundation ditch subregion vacuum precipitation method in pool, comprises the following steps：
The first step, carry out construction with artificial island in pool 1, form rectangle soil property and build island 2, built in rectangle soil property and pre- dig is released on island 2
The excavation line of foundation ditch 12；
Second step, in advance dig foundation ditch 12 around, perform precipitation hole 11 with iron pipe 6, concretely comprise the following steps：By the top ports of iron pipe 6
It is connected together by penstocks 8 with water pump 9, opens water pump 9, water with pressure is injected into the precipitation hole performed by iron pipe 6
In 11, the soil layer particle of the ttom of pipe of iron pipe 6 is loosened, and shoved upwards along the outside tube wall of iron pipe 6, pass through the handle on the top of iron pipe 6
Hand 7 pushes iron pipe 6, until depth reaches the precipitation depth of design, extracts iron pipe 6, performing for precipitation hole 11 is completed, then complete
Into precipitation hole 11 in insertion PPR plastics downcomer 3；
3rd step, the rectangle soil property around digging foundation ditch 12 in advance, which are built, sets spaced apart inner ring precipitation hole and interval cloth on island 2
The outer ring precipitation hole put, inner ring precipitation hole is laid with outer ring precipitation hole interleaved, and inserts one in each precipitation hole
PPR plastics downcomer 3；
4th step, by grafting in the PPR plastics downcomer 3 of grafting in left bank inner ring precipitation hole 11 and lower row's inner ring precipitation hole
PPR plastics downcomer 3 is connected together with inner ring lower-left communicating pipe 4, and inner ring lower-left vacuum is connected on inner ring lower-left communicating pipe 4
Self priming pump 5, starts inner ring lower-left vacuum self priming pump 5, carries out uninterrupted operation of drawing water；
5th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in right row's inner ring precipitation hole and upper row's inner ring precipitation hole
Material downcomer is connected together with inner ring upper right communicating pipe 18, and inner ring upper right vacuum self-priming is connected on inner ring upper right communicating pipe 18
Pump 19, starts inner ring upper right vacuum self priming pump 19, carries out uninterrupted operation of drawing water；
6th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in the precipitation hole of left bank outer ring and upper exclusive circle precipitation hole
Material downcomer is connected together with outer ring upper left communicating pipe 20, and outer ring upper left vacuum self-priming is connected on outer ring upper left communicating pipe 20
Pump 15, starts outer ring upper left vacuum self priming pump 15, carries out uninterrupted operation of drawing water；
7th step, by the PPR plastics downcomer of grafting in right exclusive circle precipitation hole and under in exclusive circle precipitation hole the PPR of grafting mould
Material downcomer is connected together with outer ring bottom right communicating pipe 21, and outer ring bottom right vacuum self-priming is connected on outer ring bottom right communicating pipe 21
Pump 17, starts outer ring bottom right vacuum self priming pump 17, carries out uninterrupted operation of drawing water；
8th step, when precipitation is to design attitude, excavate it is pre- dig foundation ditch 12, carry out bridge bearing platform and pier shaft performed, in cushion cap and
During pier shaft is performed, outer ring upper left vacuum self priming pump 15 and outer ring bottom right vacuum self priming pump 17 stop pumping operation, and inner ring is left
Lower vacuum self priming pump 5 and inner ring upper right vacuum self priming pump 19 still provide for operation of uninterruptedly drawing water；
9th step, remove when pier body formwork, pre- to dig after the completion of foundation ditch 12 backfills, inner ring lower-left vacuum self priming pump 5 and inner ring upper right
Vacuum self priming pump 19 stops pumping operation.
The present invention is solved gush sandy ground matter under the conditions of pool Bridge cushion cap foundation ditch it is easy due to gushing sand in digging process
The problem of causing slope failure, during whole cushion cap is performed, it is ensured that stability of groundwater level passes through below sand seam geology
Using cheap PPR plastics downcomers, the dewatering construction of Ultra Low Cost is realized, scene materials are easy, easy to operate, perform week
Phase is short, by carrying out subregion to precipitation region, the requirement to the vacuum pump power that draws water is effectively reduced, by taking height to hand over
Mistake control downcomer bottom absolute altitude and the inside and outside hole position that is equidistantly laid staggeredly can realize omnibearing stereo precipitation, by encrypting precipitation
The quantity of inlet opening in the range of pipe layer of sand, substantially increases precipitation speed.
Claims (4)
1. the bridge bearing platform foundation ditch subregion vacuum precipitation system in a kind of pool, including pool（1）, in pool（1）Lower section set
It is equipped with chiltern geological stratification（10）, in pool（1）In be backfilled with rectangle soil property and build island（2）, island is built in rectangle soil property（2）Center set
It is equipped with pre- digging foundation ditch（12）, it is characterised in that foundation ditch is being dug in advance（12）The rectangle soil property of surrounding builds island（2）On be respectively arranged between
Every the inner ring precipitation hole of arrangement（11）With spaced apart outer ring precipitation hole, inner ring precipitation hole（11）It is rectangular to lay, outer ring drop
Water hole is also rectangular to lay, inner ring precipitation hole（11）It is that interleaved is laid with outer ring precipitation hole, in each precipitation hole
It is plugged with PPR plastics downcomers（3）, in left bank inner ring precipitation hole in the PPR plastics downcomer and lower row's inner ring precipitation hole of grafting
The PPR plastics downcomer of grafting with inner ring lower-left communicating pipe（4）It is connected together, in inner ring lower-left communicating pipe（4）Upper connection
There is inner ring lower-left fairlead（13）, inner ring lower-left fairlead（13）The other end and inner ring lower-left vacuum self priming pump（5）Connection exists
Together；In right row's inner ring precipitation hole in the PPR plastics downcomer of grafting and upper row's inner ring precipitation hole grafting PPR plastics downcomers
With inner ring upper right communicating pipe（22）It is connected together, inner ring upper right communicating pipe（22）With inner ring upper right fairlead（18）Connection exists
Together, inner ring upper right fairlead（18）The other end and inner ring upper right vacuum self priming pump（19）It is connected together；Left bank outer ring drops
The PPR plastics downcomer of grafting connects with outer ring upper left in the PPR plastics downcomer of grafting in water hole and upper exclusive circle precipitation hole
Siphunculus（20）It is connected together, outer ring upper left communicating pipe（20）With outer ring upper left fairlead（14）It is connected together, outer ring upper left
Fairlead（14）The other end and outer ring upper left vacuum self priming pump（15）It is connected together；Grafting in right exclusive circle precipitation hole
PPR plastics downcomer and under in exclusive circle precipitation hole grafting PPR plastics downcomer with outer ring bottom right communicating pipe（21）Connection
Together, outer ring bottom right communicating pipe（21）With outer ring bottom right fairlead（16）It is connected together, outer ring bottom right fairlead（16）'s
The other end and outer ring bottom right vacuum self priming pump（17）It is connected together；PPR plastics downcomers（3）Bottom nozzle with being arranged on chiltern
Matter layer（10）Lower section, in PPR plastics downcomers（3）Bottom nozzle on be provided with closing cap, in PPR plastics downcomers（3）Bottom
Inlet opening is provided with the tube wall in portion, screen pack is provided with inlet opening.
2. a kind of pool Bridge cushion cap foundation ditch subregion vacuum precipitation system according to claim 1, it is characterised in that
PPR plastics downcomers（3）It is inserted into rectangle soil property and builds island（2）Soil layer in depth ratio dig foundation ditch in advance（12）Depth depth 2-3
Rice；Passing through chiltern geological stratification（10）PPR plastics downcomers（3）Tube wall on, be provided with the water inlet of encryption.
3. a kind of pool Bridge cushion cap foundation ditch subregion vacuum precipitation system according to claim 1, it is characterised in that each
PPR plastics downcomers（3）Bottom in height be laid staggeredly, difference of height be 1.5-2.0 meters.
4. the bridge bearing platform foundation ditch subregion vacuum precipitation method in a kind of pool, comprises the following steps：
The first step, in pool（1）Middle carry out construction with artificial island, forms rectangle soil property and builds island（2）, island is built in rectangle soil property（2）On put
Go out pre- digging foundation ditch（12）Excavation line；
Second step, in advance dig foundation ditch（12）Around, use iron pipe（6）Perform precipitation hole（11）, concretely comprise the following steps：By iron pipe（6）
Top ports pass through penstocks（8）With water pump（9）It is connected together, opens water pump（9）, water with pressure is passed through iron pipe（6）Note
Enter to the precipitation hole performed（11）In, make iron pipe（6）The soil layer particle of ttom of pipe loosens, and along iron pipe（6）Outside tube wall it is upward
Shove, pass through iron pipe（6）The handle on top（7）Push iron pipe（6）, until depth reaches the precipitation depth of design, extract iron pipe
（6）, complete precipitation hole（11）Perform, then in the precipitation hole of completion（11）Middle insertion PPR plastics downcomers（3）；
3rd step, in advance dig foundation ditch（12）The rectangle soil property of surrounding builds island（2）It is upper set spaced apart inner ring precipitation hole and
Every the outer ring precipitation hole of arrangement, inner ring precipitation hole is laid with outer ring precipitation hole interleaved, and is inserted in each precipitation hole
A piece PPR plastics downcomer（3）；
4th step, by left bank inner ring precipitation hole（11）The PPR plastics downcomers of interior grafting（3）With grafting in lower row's inner ring precipitation hole
PPR plastics downcomers（3）With inner ring lower-left communicating pipe（4）It is connected together, in inner ring lower-left communicating pipe（4）Upper connection inner ring
Lower-left vacuum self priming pump（5）, start inner ring lower-left vacuum self priming pump（5）, carry out uninterrupted operation of drawing water；
5th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in right row's inner ring precipitation hole and upper row's inner ring precipitation hole
Expect downcomer and inner ring upper right communicating pipe（18）It is connected together, in inner ring upper right communicating pipe（18）Upper connection inner ring upper right vacuum
Self priming pump（19）, start inner ring upper right vacuum self priming pump（19）, carry out uninterrupted operation of drawing water；
6th step, the PPR modelings by grafting in the PPR plastics downcomer of grafting in the precipitation hole of left bank outer ring and upper exclusive circle precipitation hole
Expect downcomer and outer ring upper left communicating pipe（20）It is connected together, in outer ring upper left communicating pipe（20）Upper connection outer ring upper left vacuum
Self priming pump（15）, start outer ring upper left vacuum self priming pump（15）, carry out uninterrupted operation of drawing water；
7th step, by the PPR plastics downcomer of grafting in right exclusive circle precipitation hole and under in exclusive circle precipitation hole the PPR of grafting mould
Expect downcomer and outer ring bottom right communicating pipe（21）It is connected together, in outer ring bottom right communicating pipe（21）Upper connection outer ring bottom right vacuum
Self priming pump（17）, start outer ring bottom right vacuum self priming pump（17）, carry out uninterrupted operation of drawing water；
8th step, when precipitation is to design attitude, excavate and pre- dig foundation ditch（12）, carry out bridge bearing platform and pier shaft performed, in cushion cap
During being performed with pier shaft, outer ring upper left vacuum self priming pump（15）With outer ring bottom right vacuum self priming pump（17）Stop pumping operation,
Inner ring lower-left vacuum self priming pump（5）With inner ring upper right vacuum self priming pump（19）Still provide for operation of uninterruptedly drawing water；
9th step, when pier body formwork remove, foundation ditch is dug in advance（12）After the completion of backfill, inner ring lower-left vacuum self priming pump（5）And inner ring
Upper right vacuum self priming pump（19）Stop pumping operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401674.6A CN107130622A (en) | 2017-05-31 | 2017-05-31 | Pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401674.6A CN107130622A (en) | 2017-05-31 | 2017-05-31 | Pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107130622A true CN107130622A (en) | 2017-09-05 |
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ID=59734883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710401674.6A Pending CN107130622A (en) | 2017-05-31 | 2017-05-31 | Pool Bridge cushion cap foundation ditch subregion vacuum precipitation system and precipitation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107130622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115492141A (en) * | 2022-10-21 | 2022-12-20 | 中铁二院工程集团有限责任公司 | Steel suspension box cofferdam structure and bottom plate and construction method thereof |
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| CN207079608U (en) * | 2017-05-31 | 2018-03-09 | 中铁二十一局集团第六工程有限公司 | Pool Bridge cushion cap foundation ditch subregion vacuum precipitation system |
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| CN115492141A (en) * | 2022-10-21 | 2022-12-20 | 中铁二院工程集团有限责任公司 | Steel suspension box cofferdam structure and bottom plate and construction method thereof |
| CN115492141B (en) * | 2022-10-21 | 2024-01-30 | 中铁二院工程集团有限责任公司 | Steel suspended box cofferdam structure, bottom plate thereof and construction method |
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