CN103696438A - Double-amplitude type hybrid construction method for underground engineering - Google Patents
Double-amplitude type hybrid construction method for underground engineering Download PDFInfo
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- CN103696438A CN103696438A CN201410017023.3A CN201410017023A CN103696438A CN 103696438 A CN103696438 A CN 103696438A CN 201410017023 A CN201410017023 A CN 201410017023A CN 103696438 A CN103696438 A CN 103696438A
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Abstract
The invention discloses a double-amplitude type hybrid construction method for underground engineering. The method comprises the following steps: (1) dividing a construction ground into two sections, namely, a section A and a section B; (2) sealing up the section A, constructing the section A, excavating the earthwork, and constructing an underground continuous wall so as to obtain a section A wall plate; (3) excavating the surface earthwork and manufacturing a section A top plate; (4) refilling the earthwork of the section A, constructing the section B, excavating the earthwork, and constructing an underground continuous wall so as to obtain a section B wall plate; (5) excavating the surface earthwork till the base layer of a bottom plate, and manufacturing a section A bottom plate and a section B bottom plate; (6) manufacturing a section B top plate; and (7) refilling the earthwork of the section B.
Description
Technical field
The present invention relates to a kind of construction technology, be specifically related to a kind of underground construction double width formula mixed construction method.
Background technology
Domestic city development is faced with just day by day: soil is in short supply, congested in traffic, environment pollution, energy shortage, the problems such as fragility of taking precautions against natural calamities.Urban space is expanded mode and just from " on the ground ", is turned to " solid ", and increasing municipal engineering and civil engineering are selected to underground development, and the newly-built Large Underground Structure thing of One's name is legion.But the exploitation place of underground structure is the center in city often, construction period blocked road quite large to the pressure of traffic, especially in the situation that not having peripheral path to supply Vehicle By-pass, carry out road closed construction, will cause the paralysis of urban traffic function.
The current common method of underground engineering construction mainly contains open cut and digs contrary sequence method, covers and dig semi-inverse method etc. along the practice, lid.Current some underground construction, for transport solution problem, according to road width by road in two, adopts respectively " the two bright practices " and " two contrary sequence methods or the two dark practices ".
So-called " the two bright practices " first seals a half-path, by the bright practice, does a partly-exposed basement, then and second half basement between do temporary plugging wall and temporary supporting; And then seal second half road, and by the bright practice, do second half basement, temporary plugging wall and temporary supporting are removed, thereby two basements are connected.The advantage of this practice is to meet sequence of construction, safe, and shortcoming is that the road closed time is long, do temporary plugging wall and temporary supporting, and cost is high.
So-called " two contrary sequence methods " first seals a half-path, and the enclosure wall of half of constructing, then cut the earth to basement roof basic unit is carried out half top board of basement, recovers pipeline and road surface; And then sealing second half road, second half the enclosure wall of constructing, then cut the earth to basement roof basic unit, carries out second half top board of basement be connected in last top board, recovers pipeline and road surface; Finally by the access being positioned on sidewalk, the earthwork is dug up, do basement bottom board and internal construction.The advantage of this practice is that the road closed time is short, and shortcoming is that full-reverse method construction shoveling difficulty is large, long in time limit, and joint intractability is large, and percolating water probability is high, and cost is high.
Summary of the invention
The object of the invention is in order to make up the defect of prior art, a kind of underground construction double width formula mixed construction method be provided, comprise the following steps:
(1) construction ground is divided into two sections, is made as A section and B section;
(2) sealing A section, to the construction of A section, earth excavation, construction of diaphragm wall, obtains A section wallboard;
(3) the excavation top layer earthwork, does A section top board;
(4) the backfill A section earthwork, to the construction of B section, earth excavation, construction of diaphragm wall, obtains B section wallboard;
(5) the excavation top layer earthwork, to base plate basic unit, is done A section base plate, B section base plate;
(6) do B section top board;
(7) the backfill B section earthwork.
As further improvement, in step (3), before the excavation top layer earthwork, carry out pile foundation construction, steel lattice column construction;
In step (5), before the excavation top layer earthwork, carry out pile foundation construction, steel lattice column construction;
Then at interval of a segment distance, do cross binding, the top board supporting with A section is connected together;
In step (6), do before B section top board, water steel lattice column concrete;
In step (7), before the earthwork of backfill B section, remove cross binding.
As further improvement, construction of diaphragm wall all carries out reinforced concrete construction in the mode of watering a section every a section, after a period of time, then remainder is carried out to reinforced concrete construction.
As further improvement, the width on construction ground is 25m to 32m; Described A section, B section are respectively 12m-16m and 12m-16m.
As further improvement, B section is provided with the ditch that fetches earth, described in fetch earth ditch and A section connect.
As further improvement, wallboard thickness is set to 600mm to 1000mm.
As further improvement, wallboard buried depth is set to two times of underground construction buried depth.
As further improvement, within the scope of 1m, be provided with well-points dewatering outside wallboard.
As further improvement, the top board construction seam between A section and B section is done to waterproofing work, along top board construction seam, to both sides, extend and be provided with successively from bottom to up coating waterproof layer, separation layer, pea gravel concreten topping.
As further improvement, between the coating waterproof layer within the scope of top board construction seam both sides 30-50cm and top board, be provided with coating water-proof enhancement Layer; In top board construction seam, epimere is provided with water-swellable sealing glue, and hypomere is provided with muptiple-use Grouting Pipe; Pea gravel concreten protective layer thickness is 6-8cm.
In specific implementation process, also need to overcome following technical problem:
1, the migration of underground utilities or protection:
According to the pipeline on the project town road of the common subterranean commercial area of investigation, be respectively electric power, telecommunications, plumbing, rainwater, combustion gas, heating pipeline.Along with the design stage, further deeply launch subsequently again pipeline migration construction organization.Pipeline migration is the important process of pre-construction phase, relates to department and property right unit more, moves that to change expense large, and reasonable arrangement pipeline moves to change can save investment, can speed up the work again, and to closing on the protection of pipeline, be also one of emphasis simultaneously.
Mainly in work progress by following principle, process, pipeline cross processing meets its minimum clear distance, pressure conduit as far as possible and by high-line conduit, arm, dodges main, small-bore pipe and dodge that large-diameter pipe, flexible pipe are dodged inflexibility pipeline, temporary pipeline is dodged the basic principles such as permanent pipeline.
2, the main points of construction of diaphragm wall:
The soil property situation that the thickness of diaphragm wall is indicated according to the height of Adjacent Buildings, the scale of construction, distance, ground preloading and geological prospecting report with diaphragm wall is defined as 600mm-1000mm, buried depth is generally two times of underground construction buried depth, between every width diaphragm wall, can adopt rigidity cross steel plate joint, this joint has stronger leakproof anti-permeability performance, joint and reinforcing cage gun iron link and overlapping with adjacent reinforcing cage, there is stronger transmission stress ability, reinforcing cage integral rigidity is large, and lower cage is convenient.
3, the construction point of steel lattice column:
Designing and producing with reference to < < Code for design of steel structures > > (GB50017-2003) of steel lattice column, making Ying You specialized factory completes, finished product is sent to building site, steel lattice column inserts after drilled pile, lap length >=2m, bared end top arranges bearing plate, after levelling, is connected with lattice column.The diameter of drilled pile should be more than or equal to Φ 800mm, and concrete label should be greater than C30, especially will prevent the off normal of steel lattice column watering while smashing drilled pile concrete, adopts the methods such as mould location in construction.
4, underground construction is in the measure of anti float of construction period:
Because underground construction is positioned at below ordinary water level, therefore must take reliable measure of anti float, we can arrange well-points dewatering outside diaphragm wall within the scope of 1m, groundwater table is controlled to the layer following 1.5m place of cutting the earth, only complete at underground engineering construction, after completing, the backfill earthwork and recovery road can remove.
Underground construction double width formula mixed construction method of the present invention combines the advantage of " the two bright practices " and " two contrary sequence methods ", has overcome again their defects separately, especially in business district, city, builds underground construction particularly suitable.Compared with prior art, the present invention has following features:
1, adopt underground construction double width formula mixed construction method of the present invention, when construction base plate, can once make, do not stay constuction joint, thereby avoid the generation of percolating water.
2, big machinery operation is convenient in pile foundation construction, steel lattice column construction, guarantees construction safety and programming, does cross binding guarantee workmanship by spacing distance.
3, construction of diaphragm wall all carries out reinforced concrete construction in the mode of watering a section every a section, after a period of time, then remainder is carried out to reinforced concrete construction.Like this can cancel the late poured band, the formwork and formwork supports system of having saved ater-casting constuction joint; Avoid the pressure of ater-casting constuction joint cleaning, eliminated the ater-casting cleaning hidden danger of quality bringing not in place.External wall waterproof construction does not need to do outside protection wall again.For construction, created room and time more freely, construction technology process is simple, and process improving does not need to adopt special material.Pouring quality is excellent, and speed of application is fast, the reduction of erection time, save main ingredient cost, and economic benefit and social benefit are remarkable.
4, the width on construction ground is made as 25m to 32m; A section, B section are respectively 12m-16m and 12m-16m.Can guarantee that like this section construction is efficient, safety, can make road opposing traffic again, the impact on traffic is reduced to bottom line.
5, according to sequence of construction, first complete A section top board, finally complete B section top board, based on this sequence of construction, be chosen in the B section setting ditch that fetches earth, be beneficial to underground construction and be unearthed, solved the A section difficult problem of being unearthed, improved greatly efficiency of construction.
6, the thickness of diaphragm wall is made as 600mm-1000mm, generally adapt to construction site Adjacent Buildings in city height, the scale of construction, with distance, the ground preloading situation of diaphragm wall.
7, the buried depth of underground continuous wall plate is set to two times of underground construction buried depth, and bearing capacity of foundation soil is better.
8, well-points dewatering is set outside diaphragm wall within the scope of 1m, is beneficial to groundwater table is controlled to the layer following 1.5m place of cutting the earth, guarantee workmanship, anti-floating performance is more excellent.
9, along top board construction seam, to both sides, extend and set gradually from bottom to up coating waterproof layer, separation layer, pea gravel concreten topping, adopt multiple protective materials protection multilayer structure can better block the fluid seepage of various character, water proofing property is better.
10, coating water-proof enhancement Layer is used for strengthening the water resistance of constuction joint periphery, and meets liquid mobility from high to low, and water-swellable sealing glue and muptiple-use Grouting Pipe further promote water resistance.
Accompanying drawing explanation
Fig. 1 is top board construction seam waterproof construction schematic diagram;
In figure: 1-top board, 2-top board construction seam, 3-water-swellable sealing glue, the muptiple-use Grouting Pipe of 4-, 5-coating waterproof layer, 6-separation layer, 7-pea gravel concreten topping, 8-coating water-proof enhancement Layer.
The specific embodiment
Embodiment is in connection with Figure of description below, and the present invention is described further.
Suppose that the width between the kerbstone of road sidewalk is 30m, just 30m is divided into A, B, two sections, the width of concrete every section can be adjusted according to road width, the A section of first constructing stays B section to guarantee that two-way Four-Lane Road is current; Then the B section of constructing, stays A section to guarantee that two-way Four-Lane Road is current; In order to ensure enough work planes, can distinguish 1 meter, interim borrower trade.
The construction equipment adopting is as follows:
Continuous wall trench underground machine, bored pile rig, crawler crane, mobile crane, electric welding machine, steel bar processing machinery, submersible pump and slush pump, concrete vibrator etc.
Specifically comprise the following steps:
(1) construction ground is divided into two sections, is made as A section and B section;
(2) sealing A section, to the construction of A section, earth excavation, construction of diaphragm wall, obtains A section wallboard;
(3) carry out pile foundation construction, steel lattice column construction; The excavation top layer earthwork, does A section top board 1;
(4) the backfill A section earthwork, to the construction of B section, earth excavation, construction of diaphragm wall, obtains B section wallboard;
(5) carry out pile foundation construction, steel lattice column construction; Then at interval of a segment distance, do cross binding, the top board supporting with A section is connected together; The excavation top layer earthwork, to base plate basic unit, is done A section base plate, B section base plate;
(6) water steel lattice column concrete, do B section top board 1;
(7) remove cross binding, the earthwork of backfill B section.
Construction of diaphragm wall all carries out reinforced concrete construction in the mode of watering a section every a section, after a period of time, then remainder is carried out to reinforced concrete construction.B section is provided with the ditch that fetches earth, and fetch earth ditch and A section connect.Top board construction seam 2 between A section and B section is done to waterproofing work, along top board construction seam 2, to both sides, extend and be provided with successively from bottom to up coating waterproof layer 5, separation layer 6, pea gravel concreten topping 7.Top board construction stitches between coating waterproof layer 5 within the scope of 2 both sides 30cm and top board 1 and is provided with coating water-proof enhancement Layer 8; Top board construction stitches 2 interior epimeres and is provided with water-swellable sealing glue 3, and hypomere is provided with muptiple-use Grouting Pipe 4; Pea gravel concreten topping 7 thickness are 7cm.Wallboard thickness is set to 600mm to 1000mm, and wallboard buried depth is set to two times of underground construction buried depth, is provided with well-points dewatering outside wallboard within the scope of 1m.
Claims (10)
1. a underground construction double width formula mixed construction method, is characterized in that comprising the following steps:
(1) construction ground is divided into two sections, is made as A section and B section;
(2) sealing A section, to the construction of A section, earth excavation, construction of diaphragm wall, obtains A section wallboard;
(3) the excavation top layer earthwork, does A section top board;
(4) the backfill A section earthwork, to the construction of B section, earth excavation, construction of diaphragm wall, obtains B section wallboard;
(5) the excavation top layer earthwork, to base plate basic unit, is done A section base plate, B section base plate;
(6) do B section top board;
(7) the backfill B section earthwork.
2. underground construction double width formula mixed construction method according to claim 1, is characterized in that:
In step (3), before the excavation top layer earthwork, carry out pile foundation construction, steel lattice column construction;
In step (5), before the excavation top layer earthwork, carry out pile foundation construction, steel lattice column construction;
Then at interval of a segment distance, do cross binding, the top board supporting with A section is connected together;
In step (6), do before B section top board, water steel lattice column concrete;
In step (7), before the earthwork of backfill B section, remove cross binding.
3. underground construction double width formula mixed construction method according to claim 1, is characterized in that: construction of diaphragm wall all carries out reinforced concrete construction in the mode of watering a section every a section, after a period of time, then remainder is carried out to reinforced concrete construction.
4. underground construction double width formula mixed construction method according to claim 1, is characterized in that: the width on construction ground is 25m to 32m; Described A section, B section are respectively 12m-16m and 12m-16m.
5. underground construction double width formula mixed construction method according to claim 1, is characterized in that: B section is provided with the ditch that fetches earth, described in fetch earth ditch and A section connect.
6. underground construction double width formula mixed construction method according to claim 1, is characterized in that: wallboard thickness is set to 600mm to 1000mm.
7. underground construction double width formula mixed construction method according to claim 1, is characterized in that: wallboard buried depth is set to two times of underground construction buried depth.
8. underground construction double width formula mixed construction method according to claim 1, is characterized in that: outside wallboard, within the scope of 1m, be provided with well-points dewatering.
9. underground construction double width formula mixed construction method according to claim 1; it is characterized in that: the top board construction seam between A section and B section is done to waterproofing work, along top board construction seam, to both sides, extend and be provided with successively from bottom to up coating waterproof layer, separation layer, pea gravel concreten topping.
10. underground construction double width formula mixed construction method according to claim 9, is characterized in that: between the coating waterproof layer within the scope of top board construction seam both sides 30-50cm and top board, be provided with coating water-proof enhancement Layer; In top board construction seam, epimere is provided with water-swellable sealing glue, and hypomere is provided with muptiple-use Grouting Pipe; Pea gravel concreten protective layer thickness is 6-8cm.
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| CN201410017023.3A CN103696438A (en) | 2014-01-15 | 2014-01-15 | Double-amplitude type hybrid construction method for underground engineering |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343136A (en) * | 2014-09-29 | 2015-02-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | Anti-seepage construction method of joint surface between underground continuous wall of open-cut method and underground continuous wall of cover-excavation method |
| CN106759367A (en) * | 2017-02-24 | 2017-05-31 | 中铁大桥勘测设计院集团有限公司 | The temporary road laying method of open-cut foundation ditch |
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| CN101418577A (en) * | 2008-10-22 | 2009-04-29 | 上海市城市建设设计研究院 | Cover and cut construction method of underground space road surface at soft soil area |
| CN202492860U (en) * | 2012-03-23 | 2012-10-17 | 上海市电力公司 | Foundation composite waterproof system for transformer substation radiator |
| CN103334452A (en) * | 2013-07-11 | 2013-10-02 | 李涛 | Underground engineering mixed construction method |
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2014
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Patent Citations (4)
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| GB190813189A (en) * | 1908-06-20 | 1909-02-11 | Jens Knudsen | Improved Method of Tunnelling Under Streets, Roads, Squares, Tracks and the like Surfaces of the Ground. |
| CN101418577A (en) * | 2008-10-22 | 2009-04-29 | 上海市城市建设设计研究院 | Cover and cut construction method of underground space road surface at soft soil area |
| CN202492860U (en) * | 2012-03-23 | 2012-10-17 | 上海市电力公司 | Foundation composite waterproof system for transformer substation radiator |
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Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343136A (en) * | 2014-09-29 | 2015-02-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | Anti-seepage construction method of joint surface between underground continuous wall of open-cut method and underground continuous wall of cover-excavation method |
| CN106759367A (en) * | 2017-02-24 | 2017-05-31 | 中铁大桥勘测设计院集团有限公司 | The temporary road laying method of open-cut foundation ditch |
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Application publication date: 20140402 |