CN107059904A - A kind of underground pipe gallery ponding well excavation method - Google Patents
A kind of underground pipe gallery ponding well excavation method Download PDFInfo
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- CN107059904A CN107059904A CN201710163640.8A CN201710163640A CN107059904A CN 107059904 A CN107059904 A CN 107059904A CN 201710163640 A CN201710163640 A CN 201710163640A CN 107059904 A CN107059904 A CN 107059904A
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- open caisson
- ponding well
- ponding
- well
- pipe gallery
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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
- E02D19/22—Lining sumps in trenches or other foundation pits
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Revetment (AREA)
Abstract
The present invention provides a kind of underground pipe gallery ponding well excavation method, comprises the following steps：Open caisson is made according to the size of ponding well, and open caisson is placed on the design attitude of ponding well vertically, wherein, open caisson is the pit shaft do not closed up and down, open caisson and the ponding well coaxial placement；Ponding well is excavated, until well sinking designs the lower surface of the borehole wall to the lower surface of caisson wall less than ponding well；After confirming open caisson without sinkage, in open caisson bottom casting concrete bed course；Using caisson wall as external mold, internal model is installed in open caisson, ponding well is poured.The present invention excavates underground pipe gallery ponding well using open caisson auxiliary, and open caisson forms mobile sand block wall during excavation, ensures construction quality；Open caisson inwall can directly do exterior waterproof coating simultaneously, it is not necessary to casting concrete bed course again, reduce shoveling amount and concrete cushion amount, reduce construction cost；Also, the borehole wall of open caisson is as the external mold of plash, the step of installing external mold in routine techniques is eliminated, efficiency of construction is improved.
Description
Technical field
The present invention relates to the realm of building construction, specifically, it is related to a kind of underground pipe gallery ponding well excavation method.
Background technology
Urban Underground piping lane is to build a tunnel space in Urban Underground, by electric power, communication, combustion gas, heat supply, plumbing
It is integrated in one etc. various utilities pipelines, provided with special access hole, hoisting port and monitoring system, implements unified planning, uniformly sets
Meter, unified construction and management, are the important infrastructures for ensureing city operations.In underground pipe gallery construction, various complicated geologicals
Under the conditions of earth excavation quantities is big, difficulty of construction is high, excavate 2m~3m ponding especially in the bottom plate of piping lane downwards again
Level of ground water is reduced to below ponding well by well, earth excavation, is wanted water level dropping to 3m or so under bottom plate and is not easy to, i.e.,
Water level is set to be reduced to 3m or so under bottom plate, in case of drift sand then can inwardly cave in, the ponding well borehole wall is difficult to be molded, therefore ponding well construction
Just turn into whole engineering restraining factors.Conventional practice is exactly slope open cut, prevents quicksand from caving in by slope.Traditional slope open cut
Construction technology is as shown in figure 1, first heavy excavation exceedes the depth of ponding well 9, and is cheated in the outer deeper casual water of excavation of ponding well 9
8, then with slush pump 7 by casual water cheat 8 in water sand pump to settling zone.By the thick stones of the underlay 300mm of ponding well 9~500mm
Son, is split into floral tube with electric welding by DN150 or so steel pipe (not shown), is then packed tightly with Dense mesh screen, as water accumulation pipe, by ponding
One end of pipe is buried in stone layer, in the other end access casual water hole 8 of water accumulation pipe, by underground water water conservancy diversion to casual water
Hole 8, wait underground water outside it is drained finish after, formwork pours blinding concrete 6, makees to install internal model, external mold after waterproof, assembling reinforcement,
It is synchronous with underplate concrete 5 to pour ponding well concrete 5, form ponding well 9.Conventional method complex process, excavated volume is big, by product
The time of water discharge is long, and fill concrete amount is big, costly, and it is difficult shaping to meet drift sand formation, causes the whole piping lane duration delayed, and
And later stage seepage possibility is big.
The content of the invention
To solve the problem of conventional method excavates ponding well complex process, costly, excavation and big concrete backfill amount, this
Invention excavates underground pipe gallery ponding well using open caisson auxiliary, and open caisson forms mobile sand block wall during excavation, prevents quicksand from entering, and protects
Hinder construction quality；Open caisson inwall can directly do exterior waterproof coating simultaneously, it is not necessary to casting concrete bed course again, reduce shoveling amount and
Concrete cushion amount, reduces construction cost；Also, the borehole wall of open caisson is eliminated in routine techniques as the external mold of plash
The step of installing external mold, improves efficiency of construction.
A kind of underground pipe gallery ponding well excavation method, comprises the following steps：Open caisson is made according to the design size of ponding well,
And open caisson is placed on to the top of the design attitude of ponding well vertically, wherein, the open caisson is the pit shaft do not closed up and down, described
Open caisson and the ponding well coaxial placement；Ponding well is excavated, until well sinking is less than ponding well to the lower surface of caisson wall
Design the lower surface of the borehole wall；After confirming open caisson without sinkage, in open caisson bottom casting concrete bed course；Open caisson internal water accumulation is taken out
Discharge；Using the borehole wall of open caisson as external mold, internal model is installed in open caisson, and pours bottom surface and the side wall of ponding well, so as to be made
Ponding well.
Preferably, the step of excavating ponding well includes：Using manually or mechanically excavation soil before underground water is not run into
Side；After underground water is run into, silt particle is penetrated using water jet punching, slurry is formed, and pump the slurry to ground using slush pump
Face.
Preferably, during casting concrete bed course, concrete is not vibrated.
Preferably, after open caisson internal water accumulation pump drainage is gone out check concrete cushion whether seepage, if any seepage, to seepage
Place installs internal model again after being blocked.
Preferably, well sinking deflection is corrected using cushion block.
Preferably, if certain side sinking of open caisson is too fast, with one or more cushion block pads in certain side borehole wall
Bottom surface, slows down the subsidence velocity of certain side.
Preferably, if certain side sinking of open caisson is too fast, stop penetrating high-pressure water jet to a certain side blow, slow down institute
State the subsidence velocity of certain side.
Preferably, the thickness of the concrete cushion is 300mm~500mm.
Preferably, concrete cushion includes multiple reinforced mesh.
Preferably, the inside cross-section size of open caisson is more than the inside cross-section size of ponding well.
Brief description of the drawings
By the way that embodiment is described with reference to accompanying drawings below, features described above of the invention and technological merit will become
More understand and be readily appreciated that.
Fig. 1 is the schematic diagram for representing ponding well conventional construction method；
Fig. 2 is the schematic diagram for representing the method that the use water jet of the embodiment of the present invention accelerates open caisson to decline；
Fig. 3 is the structural representation for the ponding well for representing the embodiment of the present invention；
Fig. 4 is the cross-sectional view of the underground pipe gallery for the instantiation for representing the embodiment of the present invention.
Embodiment
The embodiment of underground pipe gallery ponding well excavation method of the present invention described below with reference to the accompanying drawings.This area
Those of ordinary skill will recognize, without departing from the spirit and scope of the present invention, can be with a variety of
Mode or its combination are modified to described embodiment.Therefore, accompanying drawing and description are inherently illustrative, rather than
For limiting scope of the claims.In addition, in this manual, accompanying drawing is drawn not in scale, and identical accompanying drawing
Mark represents identical part.
Underground pipe gallery ponding well is the pit shaft extended vertically downwards from piping lane bottom plate, in underground pipe gallery construction, is first needed
Excavate to form piping lane bottom plate, then excavation forms ponding well downwards from piping lane bottom plate.Fig. 2 is the use for representing the embodiment of the present invention
Water jet accelerates the schematic diagram of the method for open caisson decline；Fig. 3 is the structural representation for the ponding well for representing the embodiment of the present invention.Ginseng
According to Fig. 2-3, the ponding well excavation method comprises the following steps：
First, open caisson 10 is made according to the size of design ponding well 11, the open caisson 10 is the pit shaft that column is not closed up and down.
Open caisson 10 can be made by the way of concreting.But the present embodiment is not intended to limit the making material of open caisson 10, open caisson
10 can also be made of the material such as steel or armored concrete.Open caisson 10 is placed on to the design position of ponding well 11 vertically
Put, and make it that open caisson 10 and ponding well 11 are coaxial.After being sunk in place due to open caisson 10, open caisson 10 will be used as the outer of ponding well 11
Mould, installs internal model (not shown) again in open caisson 10, and ponding well 11 is poured between internal model and external mold.Therefore, open caisson 10 is interior
Side cross sectional dimensions should be more than the inside cross-section size of ponding well 11.For example, rectangle is in open caisson cross section, then open caisson
Length and width should be correspondingly greater than the length and width of ponding well 11, and open caisson cross section is circular, then the internal diameter of open caisson should be greater than ponding well
11 internal diameter.
Then, ponding well 11 is excavated, is cut the earth from inside to outside from open caisson 10, can be with excavated by manual work before underground water is not run into
Pick, soil is outwards lifted using hoist engine, or can also be using machinery excavation.After underground water is run into, then using giant
15 into open caisson 10 punching penetrate high-pressure water jet, water and silt particle are mixed into slurry 17, and using slush pump 16 by open caisson 10
Slurry 17 is pumped to ground settling zone, can accelerate the subsidence velocity of open caisson 10.Due to the barrier of open caisson 10, open caisson 10 can be prevented
The silt particle in outside caves in the inner side of open caisson 10, and open caisson 10 forms the sand block wall of movement, prevents quicksand from entering.As silt particle does not stop to mix
Outer row is closed, open caisson 10 gradually sinks in place.It is so-called to sink to referring to that the borehole wall lower surface of open caisson 10 be less than the ponding designed in place
The lower surface of the borehole wall of well 11, so as to be casting concrete bed course and ponding shaft bottom layer slot milling.After open caisson 10 sinks in place
Observation for a period of time, such as checks whether open caisson 10 also has sinkage in 24 hours, until the position of open caisson 10 immobilizes.
Then, it is determined that after the transfixion of open caisson 10, using water-proof concrete casting concrete bed course 101, due to open caisson 10
It is interior to also have ponding, therefore do not vibrated when casting concrete, one-time-concreting is completed, because vibrated concrete can be from water
Analysis, causes cement mortar to be lost in, can influence the intensity of concrete.
Finally, the ponding in open caisson 10 is pumped to ground, pours ponding well 11, i.e., with concreting ponding well 11
Shaft bottom face 111 and the borehole wall 112, open caisson 10 install internal model (not shown), and colligation steel as the external mold of ponding well in open caisson 10
Muscle 113, is poured, you can complete pouring for ponding well 11.
There is no the explanation for describing to be conserved after concreting in above description.Meeting after actually usual concreting
Maintenance 3 days~5 days, curing time is determined depending on weather condition, and winter, spring length are a little, and summer, autumn are shorter.
The present embodiment excavates underground pipe gallery ponding well using open caisson auxiliary, and open caisson forms mobile sand block wall during excavation, prevents
Fluid stopping sand enters, and ensures construction quality；Open caisson inwall can directly do exterior waterproof coating simultaneously, it is not necessary to casting concrete bed course again,
Shoveling amount and concrete cushion amount are reduced, construction cost is reduced；Also, the borehole wall of open caisson is as the external mold of plash, save
The step of installing external mold in routine techniques has been omited, efficiency of construction is improved.
In one alternate embodiment, inclination may be produced in the sinking watching of open caisson 10, therefore need to observed at any time, in time
Correction.If certain side sinking of open caisson 10 is too fast, stops penetrating high-pressure water jet to the side blow, slow down the lower settling velocity of the side
Degree.
In one alternate embodiment, if certain side sinking of open caisson 10 is too fast, one or more cushion blocks can also be used
The side borehole wall bottom surface that (not shown) pad sinks fast in open caisson 10, plays the heavy effect of resistance, when both sides deflection is identical, then will pad
Block is withdrawn from.Cushion block can be using flitch common in construction.
In one alternate embodiment, seepage is checked whether after casting concrete bed course 101, and pour again after carrying out leak stopping
Ponding well.Extensive infiltration is then blocked with powdery sealing agent, the slight infiltration then leak stopping by the way of bored grouting.
Illustrated referring to Fig. 4 with instantiation, Fig. 4 is the instantiation for the underground pipe gallery for representing the embodiment of the present invention
Cross-sectional view.Certain underground pipe gallery is three chamber structures, including electric storehouse 1, hydro-thermal storehouse 2, combustion gas storehouse 3.The size in three storehouses is identical,
Wall thickness is 350mm outside storehouse, and interior wall thickness is 300mm, and clear height is 2.7m, and top plate, the thickness of bottom plate are 400mm.The bottom plate in combustion gas storehouse 3 with
Under have length × wide × depth be 1.8m × 1.8m × 2.2m ponding well 11, the wall thickness 400mm of ponding well 11, bottom plate thickness 500mm.Root
According to the size of ponding well 11, the net scale modest ability × wide × depth for determining the inner side of open caisson 10 is 2.6m × 2.6m × 3.0m~3.2m,
And corresponding bottom concrete bed course thickness is about 300mm~500mm, the wall thickness 200mm of open caisson 10.At the scene assembling reinforcement, branch
After mould, reinforcing, the position of ponding well 11 is hung to crane, open caisson 10 is poured, can also set multiple in the concrete poured
Such as 14 × 200mm of Φ reinforced mesh, with enhancing structure intensity.The form removal after concrete curing 2 days~5 days.Such as without underground
Water can be excavated directly, and people's frock soil outwards hangs soil with electronic small winch, run into underground water and then used giant Jiang Shui and mud
Slurry is penetrated into sand punching, and slurry is evacuated to ground accumulation area together with slush pump.As silt particle does not stop to stir outer row, open caisson gradually under
Sink to position.The decline situation of open caisson is observed during well sinking, is rectified a deviation at any time.Observe the sinking of open caisson side too fast, just stop
Certain side is penetrated in the punching of sealing power.If can't rectify a deviation, it can be played with flitch pad in the fast side borehole wall bottom surface of well sinking
The heavy effect of resistance.Well sinking in place after, stop pumping, observe more than 24 hours, it is anti-using C30P6 after open caisson to be determined is static
Water coagulation soil casting concrete bed course, one-time-concreting in place, does not vibrate.Concrete curing extracts ponding out in 3 days~5 days, confirms
Waterproof, and assembling reinforcement, branch internal model are done after ne-leakage in open caisson 10, then can casting concrete, form ponding well 11
The borehole wall and shaft bottom face.
The present invention excavates underground pipe gallery ponding well using open caisson auxiliary, and open caisson forms mobile sand block wall during excavation, prevents
Quicksand enters, and ensures construction quality；Open caisson inwall can directly do exterior waterproof coating simultaneously, it is not necessary to casting concrete bed course again, subtract
Lack shoveling amount and concrete cushion amount, reduce construction cost；Also, the borehole wall of open caisson is as the external mold of plash, omit
The step of installing external mold in routine techniques, improves efficiency of construction.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of underground pipe gallery ponding well excavation method, it is characterised in that comprise the following steps：
Open caisson is made according to the design size of ponding well, and open caisson is placed on to the top of the design attitude of ponding well vertically, its
In, the open caisson is the pit shaft do not closed up and down, the open caisson and the ponding well coaxial placement；
Ponding well is excavated, until well sinking designs the lower surface of the borehole wall to the lower surface of caisson wall less than ponding well；
After confirming open caisson without sinkage, in open caisson bottom casting concrete bed course；
Open caisson internal water accumulation pump drainage is gone out；
Using the borehole wall of open caisson as external mold, internal model is installed in open caisson, and pours bottom surface and the side wall of ponding well, so that ponding is made
Well.
2. underground pipe gallery ponding well excavation method according to claim 1, wherein, the step of excavating ponding well includes：
Used before underground water is not run into and manually or mechanically excavate the earthwork；
After underground water is run into, silt particle is penetrated using water jet punching, slurry is formed, and pump the slurry to ground using slush pump
Face.
3. underground pipe gallery ponding well excavation method according to claim 1, wherein, during casting concrete bed course, to coagulation
Soil does not vibrate.
4. underground pipe gallery ponding well excavation method according to claim 1, wherein, examined after open caisson internal water accumulation pump drainage is gone out
Look into concrete cushion whether seepage, if any seepage, install internal model again after being blocked to leakage.
5. underground pipe gallery ponding well excavation method according to claim 1, wherein, well sinking is corrected using cushion block inclined
Turn.
6. underground pipe gallery ponding well excavation method according to claim 5, wherein, if certain side sinking of open caisson is too fast,
Then slow down the subsidence velocity of certain side in the bottom surface of certain side borehole wall with one or more cushion block pads.
7. underground pipe gallery ponding well excavation method according to claim 2, wherein, if certain side sinking of open caisson is too fast,
Then stop penetrating high-pressure water jet to a certain side blow, slow down the subsidence velocity of certain side.
8. underground pipe gallery ponding well excavation method according to claim 1, wherein, the thickness of the concrete cushion is
300mm~500mm.
9. underground pipe gallery ponding well excavation method according to claim 1, wherein, concrete cushion includes multiple reinforcing bars
Mesh sheet.
10. underground pipe gallery ponding well excavation method according to claim 1, wherein, the inside cross-section size of open caisson is big
In the inside cross-section size of ponding well.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710163640.8A CN107059904B (en) | 2017-03-17 | 2017-03-17 | A kind of underground pipe gallery ponding well excavation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710163640.8A CN107059904B (en) | 2017-03-17 | 2017-03-17 | A kind of underground pipe gallery ponding well excavation method |
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| CN107059904A true CN107059904A (en) | 2017-08-18 |
| CN107059904B CN107059904B (en) | 2019-03-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938681A (en) * | 2017-11-26 | 2018-04-20 | 上海宝冶集团有限公司 | Way after concrete sump |
| CN109667275A (en) * | 2018-12-25 | 2019-04-23 | 上海城建市政工程（集团）有限公司 | The Yield rainfall relation device of catch pit in a kind of subway station foundation pit |
| CN109853601A (en) * | 2018-12-25 | 2019-06-07 | 上海城建市政工程（集团）有限公司 | A kind of Yield rainfall relation method of catch pit in subway station foundation pit |
| CN115110538A (en) * | 2022-06-01 | 2022-09-27 | 中国一冶集团有限公司 | Light well point and steel sleeve box combined dewatering support construction method |
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| JPS57130631A (en) * | 1981-02-06 | 1982-08-13 | Takenaka Komuten Co Ltd | Method and apparatus for treating underground water in underground excavation work |
| CN203924085U (en) * | 2014-07-01 | 2014-11-05 | 中铁城建集团第二工程有限公司 | A kind of caisson structure that is applied to collecting well |
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| JPS57130631A (en) * | 1981-02-06 | 1982-08-13 | Takenaka Komuten Co Ltd | Method and apparatus for treating underground water in underground excavation work |
| CN203924085U (en) * | 2014-07-01 | 2014-11-05 | 中铁城建集团第二工程有限公司 | A kind of caisson structure that is applied to collecting well |
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| 杨和礼等: "《土木工程施工第3版》", 30 June 2013, 武汉大学出 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938681A (en) * | 2017-11-26 | 2018-04-20 | 上海宝冶集团有限公司 | Way after concrete sump |
| CN109667275A (en) * | 2018-12-25 | 2019-04-23 | 上海城建市政工程（集团）有限公司 | The Yield rainfall relation device of catch pit in a kind of subway station foundation pit |
| CN109853601A (en) * | 2018-12-25 | 2019-06-07 | 上海城建市政工程（集团）有限公司 | A kind of Yield rainfall relation method of catch pit in subway station foundation pit |
| CN109853601B (en) * | 2018-12-25 | 2020-12-29 | 上海城建市政工程（集团）有限公司 | Water drainage method for sump in subway station foundation pit |
| CN109667275B (en) * | 2018-12-25 | 2024-02-13 | 上海城建市政工程（集团）有限公司 | Drainage device falls in sump pit in subway station foundation ditch |
| CN115110538A (en) * | 2022-06-01 | 2022-09-27 | 中国一冶集团有限公司 | Light well point and steel sleeve box combined dewatering support construction method |
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| Publication number | Publication date |
|---|---|
| CN107059904B (en) | 2019-03-12 |
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