CN106836191A - The construction method of subway building enclosure ground-connecting-wall under a kind of low clearance - Google Patents
The construction method of subway building enclosure ground-connecting-wall under a kind of low clearance Download PDFInfo
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- CN106836191A CN106836191A CN201710045552.8A CN201710045552A CN106836191A CN 106836191 A CN106836191 A CN 106836191A CN 201710045552 A CN201710045552 A CN 201710045552A CN 106836191 A CN106836191 A CN 106836191A
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- wall
- reinforcement cage
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- steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
Abstract
The invention discloses subway building enclosure ground-connecting-wall under a kind of low clearance, including steel reinforcement cage, the both sides of the steel reinforcement cage are welded with H profile steel, and the upper end side of the steel reinforcement cage is welded with steel plate, and the steel reinforcement cage is placed in inside ground-connecting-wall grooving, and the inside of steel reinforcement cage has poured concrete, the present invention is connected with ground-connecting-wall steel reinforcement cage integral manufacturing using steel plate, and low clearance merogenesis is lifted under being easy to bridge, and steel reinforcement cage steel plate is torn open after saving and is accurately positioned, convenient welding.The construction method of subway building enclosure ground-connecting-wall under a kind of low clearance that the present invention is also provided, from impact drilled as holes when connecting wall grooving AT STATION, percussive drill first creeps into main aperture, after split and beat secondary orifices, hole is finally repaiied using plane set-hammer, major-minor hole is connected to form a groove section, and percussive drill is wide using scope, and mechanical realization is simple, to stratum strong adaptability, grooving advantage of lower cost, considers, percussive drill pore-forming can meet requirement according to construction costs, formation condition and mechanical applicability etc..
Description
Technical field
The invention belongs to subway construction technical field, more specifically, more particularly under a kind of low clearance subway goes along with sb. to guard him knot
Structure ground-connecting-wall.Meanwhile, the invention further relates to a kind of construction method of subway building enclosure ground-connecting-wall under low clearance.
Background technology
With the increase of each urban population, urban transport problems has become the difficult point and hot issue of Chinese society, city
City's traffic is not only a municipal works problem or traffic technique problem, and is a comprehensive social concern.Future
The new traffic tools such as urban track traffic in several years will quickly grow, and right urban rail transit in China is still in initial development rank
Section.How to be made overall plans in process of construction, optimize general layout, reasonable distribution resource, environment purification is suited measures to local conditions, and is that each is built
If person answers urgently to be resolved hurrily.Subway is relatively more special one kind in transportation trade, and due to the advantage of its own, subway is in the present
During social and expanding economy afterwards, will necessarily play the part of a highly important role.It would therefore be desirable to strengthen conscientiously
The research and innovation of subway work technology, determine the technical measures of subway according to actual conditions, and formulate in subway work process
The Technical Management System of corresponding reasonable standard, ensures that subway work project is safely and effectively carried out with this, so as to improve ground
The total quality of iron.
With the great development of the subway construction in numerous domestic city, various complicated surrounding enviroment, geology, the hydrology, ground
Under the conditions of subway work it is more and more, the research to various construction technologies, new method is also more and more universal, it is ensured that and improve
Construction safety and work efficiency are the most important things.Carried out under the conditions of complex space metro station construction complex art get a good eye meaning and
Application prospect.So-and-so city subway line so-and-so square erect-position, under so-and-so overpass, is 9.7m with ground headroom measured data
~10.0m, low clearance construction of diaphragm wall is station weight difficult point under how realizing bridge.
The content of the invention
The invention aims to solve shortcoming present in prior art, and subway encloses under a kind of low clearance for proposing
Protection structure ground-connecting-wall.
To achieve the above object, the present invention provides following technical scheme：
Subway building enclosure ground-connecting-wall under a kind of low clearance, including steel reinforcement cage, the both sides of the steel reinforcement cage are welded with H types
Steel, the upper end side of the steel reinforcement cage is welded with steel plate, and the steel reinforcement cage is placed in inside ground-connecting-wall grooving, and steel reinforcement cage inside
Concrete is poured.
Preferably, the longitudinal reinforcement of the steel reinforcement cage is welded on the outside of steel plate.
Preferably, the two ends of described steel plate are welded on the inner side of two sides of H profile steel.
Present invention also offers a kind of construction method of subway building enclosure ground-connecting-wall under low clearance, comprise the following steps：
S1, preparation of construction：By levelling of the land treatment → measuring stake position → channel excavation → reinforcing bar colligation → template construction
Wall is led in → concreting → form removal → erection inner support → lead wall side earthen backfill construction procedure sequentially built；
S2, slurrying：Raw material first to mud mixing confirms, and does little sample testing, after required value is reached,
Batch mixing is carried out, it is stand-by after standing 24h after the completion of mixing；
S3, trenching construction：Selection using repacking percussive drill impact type rush in engineering method, main aperture is first crept into during grooving, after split
Secondary orifices is beaten, major-minor hole is connected turns into a slotted eye, finally carry out repairing hole arrival construction requirement using plane set-hammer；
S4, grooving inspection and acceptance：The grooving of step S3 has been checked, the unqualified mud in slotted eye and hole has been remained in
Sludge thing on bottom and hole wall is disposed, and carries out brush wall to groove section joint concrete wall using brush wall device, is adopted after the completion of brush wall
Wall is examined with ultrasonic wave to be tested examination with the grooving to each groove section, next operation can be just entered after acceptance(check)；
S5, ground-connecting-wall fabrication of reinforcing cage：The steel reinforcement cage of ground-connecting-wall integral manufacturing on tire film frame, in the welding of steel reinforcement cage both sides
There is H profile steel, and in the upper end side welding steel of steel reinforcement cage, complete the making of steel reinforcement cage；
S6, splice into groove：The ground-connecting-wall steel reinforcement cage merogenesis for completing step S5 is sling using crane, is spelled at merogenesis
Connect and steel reinforcement cage joint is welded with steel plate, after the completion of welding, steel reinforcement cage is fitted into the grooving for completing step S4；
S7, concreting：From D=300 round screw thread joint-type tremie to complete step S6 grooving in
Steel reinforcement cage carry out underwater concreting；
S8, ground-connecting-wall quality integrity detection：After step S7 underwater gliders are completed, and after age is reached,
The concrete quality and integrality of ground-connecting-wall are checked using ultrasonic instrument.
Preferably, mentioned in the step S5 in fabrication of reinforcing cage, in advance H profile steel side plate interior sides weld 0.2
Thick plays the galvanized iron sheet for preventing detour flow.
Preferably, state the splicing mentioned in step S6 and enter groove, when merogenesis is lifted, lower end steel reinforcement cage is installed above groove section
After in place accurate, then by upper section reinforcing bar cage hoisting and lower end steel reinforcement cage cage bar accurate contraposition, by upper section cage bar point after contraposition is accurate
Do not welded with steel plate.
Preferably, the trenching construction mentioned in the step S3, the needs when speed of fulfiling hole is significantly improved or is decreased obviously
Carry out leaving and taking slag specimen, according to slag sample analysis geological condition, control the lift of impact process rig, prevent inclined hole.
Preferably, the trenching construction mentioned in the step S3 uses mud off technique, and liquid level is higher by underground water
More than 0.5 meter of position.
Preferably, during the trenching construction mentioned in the step S3, to make each construction groove section there is the sufficient time to reach
To intensity requirement, while not influenceing engineering overall progress again, trenching construction is carried out using unit great-jump-forward.
Technique effect of the invention and advantage：Subway building enclosure ground-connecting-wall under a kind of low clearance that the present invention is provided, this
Invention is connected with ground-connecting-wall steel reinforcement cage integral manufacturing using steel plate, and low clearance merogenesis is lifted under being easy to bridge, and steel reinforcement cage steel plate is torn open
It is accurately positioned after section, convenient welding；The construction method of subway building enclosure ground-connecting-wall under a kind of low clearance that the present invention is provided,
From impact drilled as holes when station connects wall grooving, percussive drill first creeps into main aperture, after split and beat secondary orifices, hole is finally repaiied using plane set-hammer,
Major-minor hole is connected to form groove section, and percussive drill is wide using scope, and mechanical realization is simple, to stratum strong adaptability, grooving into
This is relatively low, is considered according to construction costs, formation condition and mechanical applicability etc., and percussive drill pore-forming can meet requirement.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
In figure：1 steel reinforcement cage, 2H shaped steel, 3 steel plates.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Herein
Described specific embodiment is only used to explain the present invention, is not intended to limit the present invention.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belongs to this hair
The scope of bright protection.
Embodiment
Subway building enclosure ground-connecting-wall under a kind of low clearance, including steel reinforcement cage 1, the both sides of the steel reinforcement cage 1 are welded with H types
Steel 2, the upper end side of the steel reinforcement cage 1 is welded with steel plate 3, and the steel reinforcement cage 1 is placed in inside ground-connecting-wall grooving, and steel reinforcement cage 1
Inside poured concrete.
The construction method of subway building enclosure ground-connecting-wall, comprises the following steps under a kind of low clearance：
S1, preparation of construction：
Lead wall making, construction of guide wall specific steps：Levelling of the land treatment → measuring stake position → channel excavation → reinforcing bar colligation
The earthen backfill of → template construction → concreting → form removal → erection inner support → lead wall side makes and leads wall.
S2, slurrying：
When on ground, wall is constructed, the stability of cell wall when the quality of mud property directly influences ground wall trenching construction.According to
The geological condition of this engineering and ago wall construction experience, this engineering slurry proportioning are determined according to performance requirement by experiment.Due to
The variation of material character, the mud per a collection of brand-new will carry out the test of the main performance of mud, and viscosity, proportion to mud are entered
Row test, meeting the mud of technical requirements just allows to use, if above-mentioned mud index can not meet cell wall soil stabilization, must be right
Mud index is adjusted.
Mud stirring is carried out in strict accordance with operational procedure and match ratio requirement, after carrying out confirming can use to raw material, should be done small
Sample is tested, and after required value is reached, can carry out batch mixing.During batch mixing, input amount should correctly be measured, mud
After slurry mixing, 24h should be stood, allow its rear of fully fermenting can be used.
Come into operation, mud is passed through in pumping Pipeline transport to the groove section of grooving by backstage.With the increase into groove depth,
Mud is also endlessly input into, until into trough end.In input process, the liquid level of strict control mud, it is ensured that slurry liquid
Wall 30~50cm of top surface is led in position in more than level of ground water 0.5m, and liquid level will in time mend slurry when falling, with anti-collapse.Before guarantee
The concord relation on platform and backstage, whole process is got in touch with using intercom, accomplish it is timely, accurate, avoid causing supply excessive,
Slurries overflow leads wall, or supplies very few, slurries are not enough and cause the situation of soil body slump to occur.
To ensure retaining wall effect and concrete quality, the mud after should being replaced to groove section is tested, will to not meeting
The mud asked is processed, until indices meet the requirements, rear can be used.
The regeneration treatment of mud, reclaiming mud during borehole cleaning mud and placing concrete must be by mud piece-rate system
Can be continuing with after sizing mixing again after being separated, after circulating mud is by isolation of purified, also need adjust its performance refer to
Mark, recovers its original retaining wall performance, here it is the regeneration treatment of mud.
Deterioration mud conditioning, deterioration mud is first temporarily received and kept with mud pit, then ships outer abandoning with tank car.Tank car can not used
Shipment is outer to abandon in particular cases, then using the method treatment deterioration mud of slurry dewatering or slurry curing.
S3, trenching construction：
Due to specific condition under low clearance, selection rushes in engineering method using repacking percussive drill impact type, is first crept into during grooving
Main aperture, after split beat secondary orifices, major-minor hole be connected turn into a slotted eye.Standard cell section is divided into 4 main apertures and 3 secondary orifices altogether, finally
Plane set-hammer repaiies hole.
Construction period arranges two impact drill constructions per groove segment, and during impact drilled as holes, using diligent slack rope, duty draws slag, root
Stroke is adjusted according to different soil, generally miscellaneous fill uses the small stroke of 1m with silty clay, and medium coarse sand is using 2~3m's
Stroke, circle gravel, siltstone use the middle high-stroke of 2~4m.In impact process, the hammer for linking block stamp and steel wire rope is checked at any time
Ring, prevent hammer ring abrasion it is excessive cause inclined hole and fall hammer.Carefully led to using low hammer touch, the method for interruption impact at formation variation
Cross.Hole is repaiied using plane set-hammer again after the completion of impact, the groove section for meeting design requirement is become.Returning the quarrel that recycles of slurry should drag in time
Rise, concentrate stacking to dry, pack pile is in quarrel Tu Chi, the backfill of backbreaking as one phase of ground-connecting-wall groove section.
Slag specimen is left and taken, and is the change for understanding address situation in time, slag specimen should be sampled in pore forming process during construction,
Prior notice management before sampling.Address report situation sampling for our station is carried out according to requirement once：Carried out per pore-forming 3-5m
Primary sample (impact drill)；It is sampled when speed of fulfiling hole is decreased obviously；It is to be sampled that speed of fulfiling hole is significantly improved；Other are different
It is sampled during reason condition.
Grooving quality requirement and points for attention：When continuous wall trench underground is constructed, to make each construction groove section have fully
Time reach intensity requirement, while not influenceing engineering overall progress again, trenching construction is carried out using unit great-jump-forward.According to this
The geological conditions of engineering, it is general to arrange two open slot sections, more than two groove sections, groove are at least spaced between two open slot sections
The sequence of excavation of section is similarly great-jump-forward grooving, is generally impacted every holes, with ensure will not two adjacent slots section construct successively；
Trenching construction use mud off technique, liquid level is higher by level of ground water more than 0.5 meter, in trenching construction, contaminated mud with
When extract out, into sedimentation basin precipitation, new mud is supplemented at any time in groove, when mud balance is more than 1.25, and viscosity is more than 50s,
Mud is discarded.Operational procedure：Creep into repeatedly, mud circular flow, until after grooving to designed elevation, carrying out clear base work, adopt
With the 6 clear bases of inch slush pump, mud is replaced, to meeting code requirement；Need to carry out slag specimen during grooving to leave and take, and it is detailed with geology
Report contrast is surveyed, primary sample (impact drill) is carried out per pore-forming 3-5m, be sampled when speed of fulfiling hole is decreased obviously；Speed of fulfiling hole
It is sampled when significantly improving, analyzes geological condition, control the lift of impact process rig, prevents inclined hole；According to leading wall reality
Border absolute altitude is calculated as groove depth, and using the lining rope measurement demarcated, every width surveys 2~3 points to groove depth according to its width, while basis
The depth that wall actual elevation controls grooving is led, to ensure the projected depth of diaphram wall, according to difference on impact drill rope
The depth of subterranean wall performs mark, is backbreak with control flume section.
The anti-landslide working measure of cell wall, during trenching construction, big machinery faces below when side is constructed should lay steel plate, and it is right to reduce
Ground pressure, corresponding reduction influences on cell wall.Prevent mud from missing in construction and mend slurry in time, gutter Duan Suobi is maintained all the time
The liquid level of palpus.Quality of mud fluid is inspected periodically, in time adjustment mud index.When rainy day level of ground water rises, mud is increased in time
Slurry proportion and viscosity, suspend grooving, and cover notch when rainfall is larger.
The prevention and treatment measures of grooving spillage, increase is being poured with adjacent slot section construction interlude, general construction
Adjacent slot section can be excavated behind complete concrete eight~10 hour, to reduce the influence to periphery；Mud balance is improved, mud is controlled
Liquid level, according to the research to conventional construction example, mud has very important relative to the stabilization of groove inside of continuous underground wall
Effect, so improve mud balance to greatest extent in the reasonable scope, be conducive to improving the stability of cell wall, it is existing in construction
Field ensures the height of mud liquid level, and slurry trench stability is kept by the pressure differential of mud and underground water, so special messenger couple will be arranged
Mud liquid level during grooving is monitored, and finds the situation that the mud liquid levels such as spillage decline, and slurry is mended immediately, and take other
Corresponding measure, total preparation amount of single groove segment mud should be the twice of groove section concrete design flow side amount, to prevent leakage suddenly
Landslip of the sides of the trench during slurry, disperses construction loads, and in construction, inevitable large-scale, heavy construction equipment is walked near structure, I
Will near subway side construction area, whole reinforced concrete pavement hardening will be carried out, to disperse some necessary construction lotuses
Carry, so as to reduce influence of the construction loads to station.
S4, grooving detection are checked and accepted：
Borehole cleaning changes slurry, clear bottom change slurry refer to grooving terminate and through whole hole acceptance(check) after, the unqualified mud in slotted eye
And remain in the operation that the sludge in bottom hole and hole wall is disposed.
Terminal bruss wall, in order to ensure ground-connecting-wall seam quality, prevents seam crossing from seeping water, and a phase groove concrete wall should be carried out
Clean with water.First, brush wall device is hung with impact drill frame carries out brush wall to groove section joint concrete wall, wall joint over the ground, with outer
The terminal bruss that type matches with groove section termination, is close to concrete concave surface, and swiping 20 times repeatedly up and down (can optionally reduce or increase
Plus brush wall number of times), until surface does not have mud skin, it is ensured that closely knit, non-leakage after concrete cast.Carried on the back using joint case, joint case
I-steel is stain after backfill sandbag mortar leakage prevention afterwards, brush wall device cannot be processed and processed using punching pile machine.
Ground-connecting-wall grooving detection examines wall instrument using ultrasonic wave, ground-connecting-wall each groove section after the completion of the trenching construction in time on
Report management carry out an acceptance inspection, through management acceptance(check) after, the construction of next procedure can be carried out.S5, ground-connecting-wall fabrication of reinforcing cage：
The steel reinforcement cage of ground-connecting-wall integral manufacturing on tire film frame, H profile steel is welded with steel reinforcement cage both sides, and in steel reinforcement cage
Upper end side welding steel, completes the making of steel reinforcement cage；
S6, splice into groove：
Ground-connecting-wall fabrication of reinforcing cage be connected, ground-connecting-wall steel reinforcement cage integral manufacturing and partition on tire film frame, merogenesis lifting,
Splice into groove.Every width steel reinforcement cage section length is preferably 5m (determining section length according to low clearance).Steel reinforcement cage near joints 500mm
Place's distributing reinforcement is vacant, is welded with steel plate in merogenesis lifting splicing.Decoupled after fabrication of reinforcing cage shaping it is standby, and from upper
Each sections is numbered to lower, and note finished product protection, such as oilcloth covering, anti-corrosion.Steel reinforcement cage joint geometry uses steel
Plate weld, steel plate is placed on steel reinforcement cage inner side, and reinforcing bar uses single welding to weld (length is 250mm and 300mm) with steel plate, steel plate
Thickness is 10mm, width 1400m and 1500mm.In reinforcing bar cage hoisting, steel reinforcement cage is decoupled, merogenesis lifting.When merogenesis is lifted,
Lower end steel reinforcement cage installed above groove section it is in place accurate after, it is then upper section reinforcing bar cage hoisting is accurately right with lower end steel reinforcement cage cage bar
Position, welds upper section cage bar after contraposition is accurate with steel plate respectively, and the joint rate of the same section of banjo fixing butt jointing is not more than in 50%.Hang
Dress use 100t folding arm cranes and 20t truck cranes, often save steel reinforcement abutting joints welding the time be about 1 hour, 4 electric welders.Every width ground is even
It is the time required to wall lifting 8 hours (being free of the time of having a rest)
Meanwhile, to ensure the quality of steel plate welding, reducing when steel plate is welded and lift by crane difficulty, welding steel is respectively before lifting
Welding, on the steel reinforcement cage of machined completion, i.e., with vertical section, the steel plate that need to weld cage bar is first welded on steel reinforcement cage top,
After upper reinforcement cage is in place, butt welding is carried out with the section bottom cage bar；To ensure speed of welding and welding processes accuracy, welder
First spot welding need to be carried out to weld to fix, it is ensured that every cage bar is docked in place, in the absence of phenomenons such as dislocation, after self-inspection is errorless,
Cage bar can be carried out to stagger up and down welding；Fusion length is the key of welding quality, and welding is using single welding 10d；Led in arrangement
It is ensured that spacing is uniformly straight when muscle is with distributing reinforcement；Ensure that solder joint is welded on request, prevent from occurring because scarce during lifting
Weldering, solder skip and cause reinforcing bar to come off.
S7, concreting：
Concreting in water, round screw thread joint of the tremie from D=300 are used using underwater concreting
Type.In conduit assembly, sealing ring to be checked strictly, promoting the circulation of qi tightness test of going forward side by side, prevent slurries from leaking into catheter interior, influence is mixed
Solidifying soil property amount.
After reinforcement cage immersion is in place, east side concreting to steel reinforcement cage decentralization time works as the time no more than 4 hours
More than 4 hours, reply mud parameter, bottom land sediment re-start measure, when mud balance is unsatisfactory for code requirement, Ying Jin
Row secondary pile hole cleaning.
Steel reinforcement cage is more long due to merogenesis installation time, it is necessary to carry out secondary pile hole cleaning, and mud balance should be controlled before concreting
1.15 or so, bottom hole sediment thickness is no more than 20cm to system.
Conduit is inserted into from bottom land 300~500mm of absolute altitude, places the rubber ball after blowing before concrete perfusion in conduit
Courage, the size after bladders is blown is advisable with slightly larger than conduit diameter, can pour into a mould concrete.
The installation length of conduit is checked, conduit insertion concrete depth should be maintained at 2~6 meters.When conduit length of embedment is super
After crossing 6m, conduit slowly should be up pulled out, be always ensured that conduit inserts concrete 2~6m of depth, it is conscientious timely in concreting
Perform record, per car concrete is filled in and once recorded, and concrete surface is diligent to survey diligent note.
In order to ensure mobility of the concrete in conduit, the phenomenon that concrete presss from both sides mud, groove section concrete face are prevented
Should uniformly rise and continuously pour into a mould, the cast rate of climb is not less than 3m/h, infusion time be interrupted for some reason and must not exceed 30 minutes, two
The concrete surface discrepancy in elevation between root conduit is not more than 50cm.
Meanwhile, when steel reinforcement cage is processed in advance in the galvanized iron sheet that the side plate interior sides welding 0.2mm of H profile steel is thick, along H types
The elongated arrangement in steel both sides, width 500mm is parallel with steel reinforcement cage face.During casting concrete, effect of the iron sheet in concrete mobilization force
Under shift to both sides, play a part of prevent stream.When pouring, filling steel reinforcement cage termination backbreak part sand pocket when, use gravity
Ram and sandbag is pounded into densification real (it is 7m × 0.5m × 0.5m that gravity rams size, and H profile steel web height is 0.888m) segmentation compacting, one
As be bottom 16m ram once, then often fill out 5m ram once.So circulation, untill sand pocket is filled into more than the face of pouring.S8、
Ground-connecting-wall quality integrity detection：
After underwater gliders are complete, after reaching age, using ultrasonic instrument to the concrete quality of ground-connecting-wall and complete
Whole property is checked.
In sum：Subway building enclosure ground-connecting-wall under a kind of low clearance that the present invention is provided, the present invention is with ground-connecting-wall steel
The integral manufacturing of muscle cage 1, is connected using steel plate 3, is accurately determined after low clearance merogenesis is lifted under being easy to bridge, and steel reinforcement cage steel plate 3 tears section open
Position, convenient welding；The present invention provide a kind of low clearance under subway building enclosure ground-connecting-wall construction method, connect AT STATION wall into
From impact drilled as holes during groove, percussive drill first creeps into main aperture, after split and beat secondary orifices, hole is finally repaiied using plane set-hammer, major-minor hole is connected
Groove section is formed, percussive drill is wide using scope, and mechanical realization is simple, to stratum strong adaptability, grooving advantage of lower cost,
Considered according to construction costs, formation condition and mechanical applicability etc., percussive drill pore-forming can meet requirement.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent carried out to which part technical characteristic,
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention
Within protection domain.
Claims (9)
1. a kind of subway building enclosure ground-connecting-wall under low clearance, including steel reinforcement cage (1), it is characterised in that：The steel reinforcement cage (1)
Both sides are welded with H profile steel (2), and the upper end side of the steel reinforcement cage (1) is welded with steel plate (3), and the steel reinforcement cage (1) connects with being placed in
Inside wall grooving, and the inside of steel reinforcement cage (1) has poured concrete.
2. subway building enclosure ground-connecting-wall under a kind of low clearance according to claim 1, it is characterised in that：The steel reinforcement cage
(1) longitudinal reinforcement is welded on the outside of steel plate (3).
3. subway building enclosure ground-connecting-wall under a kind of low clearance according to claim 1, it is characterised in that：Described steel plate
(3) two ends are welded on the inner side of two sides of H profile steel (2).
4. under the low clearance described in a kind of claim 1 subway building enclosure ground-connecting-wall construction method, it is characterised in that：Including
Following steps：
S1, preparation of construction：By levelling of the land treatment → measuring stake position → channel excavation → reinforcing bar colligation → template construction → mixed
Solidifying soil pours → and form removal → erection inner support → lead wall side earthen backfill construction procedure sequentially built leads wall；
S2, slurrying：Raw material first to mud mixing confirms, and does little sample testing, after required value is reached, carries out
Batch mixing, it is stand-by after standing 24h after the completion of mixing；
S3, trenching construction：Selection using repacking percussive drill impact type rush in engineering method, main aperture is first crept into during grooving, after split beat pair
Hole, major-minor hole is connected turns into a slotted eye, finally carries out repairing hole arrival construction requirement using plane set-hammer；
S4, grooving inspection and acceptance：Checked the grooving of step S3, the unqualified mud in slotted eye and remain in bottom hole and
Sludge thing on hole wall is disposed, and carries out brush wall to groove section joint concrete wall using brush wall device, using super after the completion of brush wall
Sound wave is examined wall and is tested examination with the grooving to each groove section, and next operation can be just entered after acceptance(check)；
S5, ground-connecting-wall fabrication of reinforcing cage：Steel reinforcement cage (1) integral manufacturing on tire film frame of ground-connecting-wall, in the weldering of steel reinforcement cage (1) both sides
H profile steel (2) is connected to, and in upper end side welding steel (3) of steel reinforcement cage (1), completes the making of steel reinforcement cage (1)；
S6, splice into groove：Ground-connecting-wall steel reinforcement cage (1) merogenesis for completing step S5 is sling using crane, is spelled at merogenesis
Connect and steel reinforcement cage (1) joint is welded with steel plate (3), after the completion of welding, steel reinforcement cage (1) is loaded the grooving for completing step S4
In；
S7, concreting：From D=300 round screw thread joint-type tremie to complete step S6 grooving in steel
Muscle cage (1) carries out underwater concreting；
S8, ground-connecting-wall quality integrity detection：After step S7 underwater gliders are completed, and after age is reached, utilize
Ultrasonic instrument is checked the concrete quality and integrality of ground-connecting-wall.
5. under a kind of low clearance according to claim 4 subway building enclosure ground-connecting-wall construction method, it is characterised in that：
Mentioned in the step S5 when steel reinforcement cage (1) makes, the side plate interior sides in H profile steel (2) weld 0.2 thickness and play resistance in advance
The only galvanized iron sheet of detour flow.
6. under a kind of low clearance according to claim 4 subway building enclosure ground-connecting-wall construction method, it is characterised in that：
The splicing mentioned in the step S6 enters groove, and when merogenesis is lifted, lower end steel reinforcement cage (1) is installed in place accurate above groove section
Afterwards, then by upper section steel reinforcement cage (1) lifting and lower end steel reinforcement cage (1) cage bar accurate contraposition, by upper section cage bar difference after contraposition is accurate
Welded with steel plate (3).
7. under a kind of low clearance according to claim 4 subway building enclosure ground-connecting-wall construction method, it is characterised in that：
The trenching construction mentioned in the step S3, needs to carry out leaving and taking slag specimen, root when speed of fulfiling hole is significantly improved or is decreased obviously
According to slag sample analysis geological condition, the lift of impact process rig is controlled, prevent inclined hole.
8. under a kind of low clearance according to claim 4 subway building enclosure ground-connecting-wall construction method, it is characterised in that：
The trenching construction mentioned in the step S3 uses mud off technique, and liquid level is higher by level of ground water more than 0.5 meter.
9. under a kind of low clearance according to claim 4 subway building enclosure ground-connecting-wall construction method, it is characterised in that：
During the trenching construction mentioned in the step S3, to make each construction groove section there is the sufficient time to reach intensity requirement, while
Do not influence engineering overall progress, trenching construction again is carried out using unit great-jump-forward.
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| CN108118687A (en) * | 2017-12-29 | 2018-06-05 | 上海市基础工程集团有限公司 | Multi-functional construction of diaphragm wall device |
| CN109680690A (en) * | 2018-11-21 | 2019-04-26 | 中铁十二局集团第二工程有限公司 | Diaphram wall steel reinforcement cage merogenesis construction method for hanging under low-headroom condition |
| WO2021013201A1 (en) * | 2019-07-24 | 2021-01-28 | 青岛理工大学 | Water stopping device and method for ground continuous wall joint in high-water-rich coastal area |
| CN112709218A (en) * | 2020-12-25 | 2021-04-27 | 中国建筑股份有限公司 | Underground continuous wall structure using spliced reinforcement cage and construction method thereof |
| CN113353782A (en) * | 2021-06-08 | 2021-09-07 | 中铁四局集团第五工程有限公司 | Low-clearance ground wall-connected reinforcement cage rapid hoisting construction method |
| CN113513015A (en) * | 2021-08-04 | 2021-10-19 | 桂林电子科技大学 | Semi-prefabricated concrete reinforcement cage underground continuous wall and construction method |
| CN113565087A (en) * | 2021-05-04 | 2021-10-29 | 中铁上海工程局集团有限公司 | Underground continuous wall reinforcement cage structure with formwork and construction method thereof |
| CN113684837A (en) * | 2021-09-16 | 2021-11-23 | 中国建设基础设施有限公司 | Pile-wall type foundation pit supporting and water stopping integrated structure and construction method thereof |
| CN114808696A (en) * | 2022-05-07 | 2022-07-29 | 广西欣港交通投资有限公司 | Prefabricated and cast-in-place combined anchorage foundation enclosure structure and construction method |
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| CN113353782A (en) * | 2021-06-08 | 2021-09-07 | 中铁四局集团第五工程有限公司 | Low-clearance ground wall-connected reinforcement cage rapid hoisting construction method |
| CN113513015A (en) * | 2021-08-04 | 2021-10-19 | 桂林电子科技大学 | Semi-prefabricated concrete reinforcement cage underground continuous wall and construction method |
| CN113684837A (en) * | 2021-09-16 | 2021-11-23 | 中国建设基础设施有限公司 | Pile-wall type foundation pit supporting and water stopping integrated structure and construction method thereof |
| CN114808696A (en) * | 2022-05-07 | 2022-07-29 | 广西欣港交通投资有限公司 | Prefabricated and cast-in-place combined anchorage foundation enclosure structure and construction method |
| CN115369856A (en) * | 2022-08-29 | 2022-11-22 | 中铁二十局集团南方工程有限公司 | Super irrigation prevention device for underground continuous wall grooving construction |
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