CN206667278U - Lava crack Tunnel gushing treatment constructing structure - Google Patents

Lava crack Tunnel gushing treatment constructing structure Download PDF

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Publication number
CN206667278U
CN206667278U CN201720384514.0U CN201720384514U CN206667278U CN 206667278 U CN206667278 U CN 206667278U CN 201720384514 U CN201720384514 U CN 201720384514U CN 206667278 U CN206667278 U CN 206667278U
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CN
China
Prior art keywords
water
slip casting
plate
lava
building enclosure
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Expired - Fee Related
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CN201720384514.0U
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Chinese (zh)
Inventor
阳紫东
肖清安
张桥
胡俊
许瑜柯
陈浩淼
龙卫明
张福平
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China Railway 11th Bureau Group Co Ltd
China Railway 11th Bureau Group Urban Rail Engineering Co Ltd
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China Railway 11th Bureau Group Co Ltd
China Railway 11th Bureau Group Urban Rail Engineering Co Ltd
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Priority to CN201720384514.0U priority Critical patent/CN206667278U/en
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Publication of CN206667278U publication Critical patent/CN206667278U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model provides a kind of lava crack Tunnel gushing treatment constructing structure.The constructing structure includes arranging plate laminated structure and multiple vertical demixing injected holes, and the plate laminated structure encloses the draining cavity set by building enclosure, the concrete water-proof plate that is covered in the supporting plate of draining cavity accent, is arranged on the coagulation soil pressure plate on supporting plate top and is arranged on outside building enclosure forms;Drainage drainpipe is provided with building enclosure bottom, control valve is provided with the part that drainage drainpipe is placed in outside plate laminated structure;The multiple vertical demixing injected hole scattering device sequentially forms multilayer slip casting water barrier under in the lava fractured rock by the way of the vertical demixing slip casting below water burst mouth around plate laminated structure from lower.The utility model is preferable to the plugging action of karst area crevice water, and ageing and stability is stronger, and the phenomenon of water burst again of foundation ditch occurs when can effectively prevent secondary excavation.

Description

Lava crack Tunnel gushing treatment constructing structure
Technical field
The utility model belongs to city track traffic engineering field, is split in specifically a kind of Excavation Process for karst The improvement constructing structure of gap water burst.
Background technology
In China karst area, area is vast, and the area such as south China Yunnan, Guangxi, Guangdong, Guizhou, Sichuan is by karst Have a great influence.Karst Problem is a key subjects, at home in city development and engineering construction, is related to the more problems.From Domestic and international existing document is seen, relatively fewer to the study mechanism of karst declogging, main reasons is that:Karst declogging is as tunnel A kind of and geological disaster in underground engineering.It is relatively fewer to the study mechanism of karst both at home and abroad, the prominent mud of gushing water and correlation Problem is an extremely serious harm for underground engineering and tunnel, and its huge power that is sudden, can not keeping out is serious Ground threatens the life security of workmen, therefore karst declogging mechanism is furtherd investigate, and is very necessary and urgent 's.
In recent years, many area reports were because underground engineering excavation of foundation pit touched related lava crack in underground etc. and causes ground Cave in, or even the sayings such as karst topography occur, therefore in work progress, be considered as the shadow for avoiding lava problem from bringing surrounding enviroment Ring.Karst Fissures water burst is one kind common in Excavation Process construction problem as caused by unfavorable geology.In excavation of foundation pit During, because substrate rock stratum degree of crushing is big, rock RQD values are small, and integrality is poor, cause the outer underground water of foundation ditch to pass through Karst Fissures Around foundation pit enclosure structure bottom, pour in inside foundation ditch, because the inside and outside water level discrepancy in elevation is big, produces larger head pressure, cause to dash forward Water yield is big, and hydraulic pressure is difficult to block greatly;Stratiform Bedrock Crevice Water and Karst-fissure water simultaneously, are artesian water, the tax of underground water Heterogeneity is deposited, in cranny development location, water is relatively abundant, because the water yield and water penetration of rock stratum are mainly by its cranny development journey Degree is controlled, and obvious inhomogeneities be present, therefore in the presence of the local possibility for having larger water yield.
The main flow method of reply excavation of foundation pit Tunnel gushing treatment is to draw the side of hole slip casting in foundation ditch outside drainage back-pressure foundation ditch at present Method, the administering method are primarily present following notable defect in prominent gush of reply Karst Fissures:
1st, solution cavity and crevice water source channels are intricate in lava, and water source and passage can not be clearly and for processing, drillings Slip casting has very big blindness, causes to draw that hole range of grouting is wide, and engineering difficulty is big and processing cost is high, and time-consuming;
2nd, the specific aim that bored grouting is filled to severely-weathered band and crushed zone crack is poor, filling processing model in crack karst Enclose without unified theoretical foundation;
3rd, using the single or double slurry of cement, from bottom hole, injecting treatment, the outer slip casting in hole use slip casting side from bottom to top from bottom to top Formula, having blindness can only be judged by the size of water-carrying capacity and the size of grouting pressure to the effect of slurries filled opening It is uncertain.If the shadoof slip casting after water-carrying capacity reduction, it can not determine whether bottom crack fills substantial, and the later stage is if there is water Flow reduces unobvious, and show that crack water burst band is located at needs the later stage when slurry is mended in this position again, it is necessary to draw hole again herein Slip casting, later stage supplement grouting serous fluid diffusion are extremely difficult.The soil body and rock stratum contact surface imprecision of slip casting solidification, it is impossible to envelope completely Dead seepage water, while multiple water sources be present in foundation ditch water burst, some possibility are not verified also.
The content of the invention
The utility model, which is directed to the prominent Processing tecchnics pin that gushes of Karst-fissure water in existing underground engineering Excavation Process, to be present Specific aim deficiency, a kind of DeGrain, the problem of experience blindness, there is provided vertical demixing grouting treatment lava crack water burst Constructing structure is handled, the constructing structure is filled, from water burst root using injecting treatment inside foundation ditch to basement strata using slurries Upper improvement completely cuts off with outside level of ground water.
Technical scheme provided by the utility model:A kind of lava crack Tunnel gushing treatment constructing structure, it is characterised in that: The constructing structure includes being arranged on the plate laminated structure at water burst mouth and the multiple vertical demixing slip castings being laid in around water burst mouth Hole, the plate laminated structure are to enclose the draining cavity set, the row of being covered in around water burst mouth by the building enclosure piled up The supporting plate of water cavity accent, the coagulation soil pressure plate for being arranged on supporting plate top and the concrete that is arranged on outside building enclosure are prevented Water plate forms, and is tightly connected between the coagulation soil pressure plate and concrete water-proof plate;Drainage draining is provided with building enclosure bottom Pipe, the drainage drainpipe water inlet are placed in draining cavity, and water side is placed in plate through building enclosure and concrete water-proof plate The outside of laminated structure, and it is provided with control valve in the part that drainage drainpipe is placed in outside plate laminated structure;The multiple vertical demixing Injected hole scattering device is around plate laminated structure, and the lava crack by the way of vertical demixing slip casting below water burst mouth Multilayer slip casting water barrier is sequentially formed under from lower in rock stratum.
The utility model preferably technical scheme:Each injected hole is carried out by the way of successively vertical slip casting from top to bottom Slip casting, after crack closure between rock is completed the stable slip casting water barrier of formation by the slurries of every layer of grouting layer, it is further continued for vertical drilling Carry out the construction of lower floor's slip casting water barrier.
The utility model preferably technical scheme:The coagulation soil pressure plate and concrete water-proof plate are being propped up using concrete The concrete of back-pressure formation is covered outside fagging and building enclosure together.
The utility model preferably technical scheme:The building enclosure encloses the draining cavity area set as 1-4m2
The utility model preferably technical scheme:The building enclosure is piled up using sandbag around water burst mouth to be formed Circular or square structure, the height of building enclosure are higher than the height of water burst mouth.
The utility model preferably technical scheme:The multiple injected hole is in quincunx distribution, and cloth pitch of holes is 1.5-3m.
Dashed forward in the utility model foundation ditch and gush the mode that place takes delamination pour slurry, finally will converge at place in water route everywhere, on Portion uses concrete backfill, and hole slip casting is drawn in rear layering, is kept apart since bottom with external source.
It is in larger distance that the utility model suitable for water burst source leaves digging face, and karst area external world water passes through karst The situation that area communicates with excavation pit, preferable to the plugging action of karst area crevice water, ageing and stability is stronger, can When effectively preventing secondary excavation, the phenomenon of water burst again of foundation ditch occurs.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the slip casting schematic diagram of second layer slip casting water barrier of the present utility model;
Fig. 3 is injected hole distribution schematic diagram of the present utility model.
In figure:1-water burst mouth, 2-building enclosure, 3-draining cavity, 4-drainage drainpipe, 5-control valve, 6-mixed Solidifying soil pressure plate, 7-lava fractured rock, 8-slip casting water barrier, 9-supporting plate, 10-concrete water-proof plate, 11-layering note Starch hole, 12-design of foundation pit bottom surface
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.A kind of lava crack water burst as shown in Figure 1 to Figure 3 Constructing structure is handled, including is arranged on the plate laminated structure at water burst mouth 1 and the multiple vertical demixings being laid in around water burst mouth 1 note Hole 11 is starched, the plate laminated structure is that the draining cavity 3 set is enclosed around water burst mouth 1 by the building enclosure 2 piled up, is covered Cover the accent of draining cavity 3 supporting plate 9, be arranged on the coagulation soil pressure plate 6 on the top of supporting plate 9 and be arranged on outside building enclosure 2 The concrete water-proof plate 10 in portion forms, the building enclosure 2 be piled up using sandbag around water burst mouth 1 it is circular or square Shape structure, the height of building enclosure 2 are higher than the height of water burst mouth 1, building enclosure 2 enclose the area of draining cavity 3 that sets as 1.5-2.5m2;The coagulation soil pressure plate 6 and concrete water-proof plate 10 are to use concrete outside supporting plate 9 and building enclosure 2 The concrete to be formed is poured together.Drainage drainpipe 4 is provided with the bottom of building enclosure 2, the drainage drainpipe 4 is intake Mouthful it is placed in draining cavity 3, water side is placed in the outside of plate laminated structure through building enclosure 2 and concrete water-proof plate 10, and The part that drainage drainpipe 4 is placed in outside plate laminated structure is provided with control valve 5.
As shown in figure 3, the multiple scattering device of vertical demixing injected hole 11 is around plate laminated structure, in quincunx point Cloth, cloth pitch of holes are 1.5-3m.And in lava fractured rock 7 by the way of vertical demixing slip casting below water burst mouth 1 from Under multilayer slip casting water barrier 8 is sequentially formed under.Each injected hole 11 is carried out by the way of successively vertical slip casting from top to bottom Slip casting, after crack closure between rock is completed to form stable slip casting water barrier 8 by the slurries of every layer of grouting layer, it is further continued for vertical drilling Carry out the construction of lower floor's slip casting water barrier 8.
The utility model first determines the origin cause of formation of prominent water burst before construction, by the observation to issue water burst situation come Judge at this whether be Karst-fissure water.Geologic prospect when being defined as Karst-fissure water then with reference to water burst position is reported, is passed through Analysis geology exploration data around issue judge the origin cause of formation of water burst at this whether be rock crack water burst.When the water burst origin cause of formation Between rock during crevice water, external water level is penetrated into foundation ditch by the crack between rock, and issue is more without fixed water vein, then in water burst Head pressure difference determines inside and outside range of point influence;Such as gushed for external water level by the counter of solution cavity, there is stable water proof around solution cavity Layer, when issue is more single, then stops water burst by draining back-pressure and handled again.
The utility model is according to excavation of foundation pit depth and basement rock integrality, it is determined that drawing hole depth and cloth pitch of holes, according to cloth Pitch of holes selectes Mortar mix proportion and grouting pressure, and the rock RQD of data offer is surveyed in base area and differentiation degree determines that slip casting is pre- Estimate.
Its Specific construction process is as follows:
1. after finding water burst situation, plate laminated structure is performed at water burst mouth 1 first.Specifically first pass through sandbag and pile up and go along with sb. to guard him Structure 2, water burst mouth 1 is fenced up, water burst (possible miscellaneous band silt) is all gathered in the draining cavity 3 of building enclosure shape, And drainage tube water conservancy diversion is carried out using wired hose, and supporting plate is set in the accent of draining cavity, then using concreting The mode for covering back-pressure covers draining cavity and building enclosure, and forms coagulation on the outside of portion on the supporting plate and building enclosure Soil pressure plate 6;
2. drawing hole slip casting around plate laminated structure, carry out being layered vertical slip casting.To prevent Karst-fissure water is prominent from gushing, using point Layer bored grouting method slip casting, does radius reasonable Arrangement hole position, according to limestone area grout spreading range scope, hole with 4m scopes Spacing 1--1.5m quincuncial arrangements.When part hole position conflicts with scene, appropriate adjustment can be made, in order to site operation; Each mark hole position is numbered and records coordinate, in case the later stage uses;Drilling sequences from outside to inside, when outside every layer of perforate Slip casting finishes carries out internal hole position slip casting again, successively deeply;3 layers of whole hole hole depth of drilling of drilling construction point are respectively 4m, 9m, 13m (it is ultimate depth that complete core 1m is met in drilling, then the layer depth of decile three), after treating first layer hole position slip casting, in foramen primum position From new lower drilling row second layer drilling and slip casting the like;Prevent that piercing crack gushs, and is draining during slip casting Drainpipe 4 is provided with control valve 5, during slip casting, closes the valve of drainage drainpipe 4 in time if there is grout phenomenon, Prevent slurries from being gushed from water burst mouth 1, slurries are effectively controlled in process range.
The utility model should also be noted that during slip casting:Certain depth is got into according to each injected hole of design requirement, opened Bore dia is φ 91mm, should be paid attention at any time during drill hole of drilling machine, and hole position whether there is bright water, and water size, and the moment is carried out should To measure, prevent that occurring water burst in boring procedure gushes sand;Cement used in slip casting preferably uses Portland cement, cement mark Number be preferably P.O42.5;Slurries must stir, and slip casting process must be continuous, the ratio of mud strictly be controlled, when cement grout stirs Between should not be less than 2min in case slurries isolate, influence quality;During slip casting, to points such as ground periphery water level, surface subsidence Position detect and timely feedback monitoring data.
Slip casting in the utility model uses wss slip casting construction methods.Its cardinal principle is:During slip casting, slurries are unchanged In the case of layer composition, existing water between soil layer particle is forced into extrusion, makes void among particles full of slurries and makes its consolidation, Split point slip casting is formed, reaches the purpose of improvement soil layer character.Its slip casting characteristic is to make the soil layer cohesive force (c), angle of internal frictionValue increase, so that stratum adhesion strength and compactness increase, play reinforcement effect;Slurry full of consolidation in particulate interspaces After liquid, make the reduction of soil layer water penetration, form water barrier.
Fracture grouting uses high-pressure slip-casting technique, and cement or chemical grout etc. are injected into soil layer, to improve soil layer property, During slip casting, the slurries of Grouting Pipe outlet are applied with additional compression to surrounding stratum, make the soil body that shearing crack occur, and starch Liquid then cleaves along crack from the low place of soil strength to the high place of intensity, splits the slurry in the soil body and just forms reinforcing The network or skeleton of the soil body.Fracture grouting is current using a kind of wider soft layer reinforcement means, and it both can be applied to ooze The preferable layer of sand of permeability, can be applied to the viscous soil horizon of poor permeability again.Because in same formation fracture grouting range of scatter with Slip casting time and grouting pressure are directly proportional.In the case of last layer forms water barrier, it is possible to increase next layer of grouting pressure improves slurry Liquid range of scatter, grouting pressure successively increase with the increase of top impermeable layer thickness, finally begin to use slurries by rock from bottom The crack closure on molten stratum is dead, is separated with external source.
Grout coordinate ratio in the utility model:Slip casting uses two fluid grouting technique, and the cement mortar ratio of mud is 1:1, waterglass It is about BE=40 (density 1.38t/m3) that former material, which uses concentration, cement mortar:The proportioning of waterglass is according to the condensation of field test Time determines.Using cement and waterglass as host, both are injected in a manner of biliquid according to a certain percentage, add additives if necessary The injecting paste material formed.Overcome the setting time length of single liquid cement mortar and can not control, the low shortcoming of calculus rate, improve The effect of cement injection, expand the scope of application of cement injection.
Cement condensation in itself and hardening are mainly that hydrated cementitious is separated out caused by the colloidal substance of gelation, in silicic acid Calcium hydroxide is produced in the hydration process of DFP.After waterglass is added, waterglass horse back and newly-generated calcium hydroxide reaction, Gelinite hydrated calcium silicate of the generation with some strength.
Obtaining optimal dual slurry construction proportioning through overtesting is:Water ash mass ratio is used as 1:1.5 cement mortars, Be=40 Water glass solution, both are according to 1:1 nominal mix;It is Be=40 water glass solutions from waterglass, proportion 1.381, water Glass content is 480.58Kg/m3, and its dual slurry proportioning (mass ratio) is:Water:Cement:Waterglass (pure water glass)=745: 445:240=1.67:1:0.54.In the dual slurry setting time of ratio synthesis substantially within 10s-15s, it can play rapid The effect of sealing.
Slip casting termination pressure of the present utility model according to level of ground water and pressure can adjust Stress control 0.5MPa with Under, constant pressure is stopped for 10 minutes, is caused slurries to concentrate grout leaking in order to avoid pressure is excessive, is influenceed water shutoff water-stagnating effect;During slip casting To near leakage point and drainage tube pay close attention to, once occur grout phenomenon stop slip casting immediately and grout point carried out at closure Reason, restarts slip casting after standing 1~2 minute after the completion of closure, strengthens spot-check grout coordinate ratio in guarantee slurry in work progress Liquid setting time meets construction requirement.Pressure is controlled during slip casting and carries pipe in time when finding that pressure is excessive, is being noted Injected hole neighbour hole is opened during slurry, observation pulp, water outlet situation.
Slurries filling situation judges:It can be reported according to the geologic prospect of issue position, determine the broken of the position rock stratum Degree, further according to rock RQD values it is counter push away the pre- appraisal that needs to fill slurries, when slurries filling situation reaches pre- appraisal, and press Power reaches design load, and water-carrying capacity change is substantially that then can determine whether that slip casting filling finishes, and can carry out next layer of construction.

Claims (6)

  1. A kind of 1. lava crack Tunnel gushing treatment constructing structure, it is characterised in that:The constructing structure includes being arranged on water burst mouth (1) The plate laminated structure at place and the multiple vertical demixing injected holes (11) being laid in around water burst mouth (1), the plate laminated structure is by heap The building enclosure (2) formed is built to enclose the draining cavity (3) set around water burst mouth (1), be covered in draining cavity (3) accent Supporting plate (9), be arranged on the coagulation soil pressure plate (6) on supporting plate (9) top and be arranged on the outside concrete of building enclosure (2) Splash guard (10) forms, and is tightly connected between the coagulation soil pressure plate (6) and concrete water-proof plate (10);In building enclosure (2) Bottom is provided with drainage drainpipe (4), and described drainage drainpipe (4) water inlet is placed in draining cavity (3), and water side passes through and gone along with sb. to guard him Structure (2) and concrete water-proof plate (10) are placed in the outside of plate laminated structure, and are placed in drainage drainpipe (4) outside plate laminated structure Part be provided with control valve (5);The multiple vertical demixing injected hole (11) scattering device uses around plate laminated structure Multilayer slip casting is sequentially formed under from lower in lava fractured rock (7) of the mode of vertical demixing slip casting below water burst mouth (1) Water barrier (8).
  2. A kind of 2. lava crack Tunnel gushing treatment constructing structure according to claim 1, it is characterised in that:Each injected hole (11) slip casting is carried out by the way of successively vertical slip casting from top to bottom, has blocked crack between rock in the slurries of every layer of grouting layer It is shaped as after stablizing slip casting water barrier (8), is further continued for the construction that vertical drilling carries out lower floor's slip casting water barrier (8).
  3. A kind of 3. lava crack Tunnel gushing treatment constructing structure according to claim 1, it is characterised in that:The coagulation soil pressure Plate (6) and concrete water-proof plate (10) are in the outside covering back-pressure shape together of supporting plate (9) and building enclosure (2) using concrete Into concrete.
  4. A kind of 4. lava crack Tunnel gushing treatment constructing structure according to claim 1, it is characterised in that:The building enclosure (2) draining cavity (3) area set is enclosed as 1-4m2
  5. A kind of 5. lava crack Tunnel gushing treatment constructing structure according to claim 1, it is characterised in that:The building enclosure (2) it is circle or the square structure piled up water burst mouth (1) around using sandbag, the height of building enclosure (2), which is higher than, gushes The height at the mouth of a river (1).
  6. A kind of 6. lava crack Tunnel gushing treatment constructing structure according to claim 1, it is characterised in that:The multiple slip casting Hole (11) is in quincunx distribution, and cloth pitch of holes is 1.5-3m.
CN201720384514.0U 2017-04-13 2017-04-13 Lava crack Tunnel gushing treatment constructing structure Expired - Fee Related CN206667278U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109098197A (en) * 2018-09-04 2018-12-28 中电建南方建设投资有限公司 One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method
CN109811778A (en) * 2019-03-27 2019-05-28 中建四局第一建筑工程有限公司 A kind of ultra-deep foundation pit goes along with sb. to guard him water sealing structure and method
CN109881694A (en) * 2019-04-04 2019-06-14 中铁十一局集团城市轨道工程有限公司 A kind of constructing structure blocked for foundation pit substrate Sand and method
CN112031811A (en) * 2020-07-22 2020-12-04 济南力稳岩土工程有限公司 System and method for blocking cliff through water burst and grouting
CN112609722A (en) * 2020-12-09 2021-04-06 中铁二十局集团第六工程有限公司 Drainage and water leakage plugging method for deep foundation pit in sea reclamation area
CN113529683A (en) * 2021-08-12 2021-10-22 中铁十二局集团有限公司 Strong rock water-dissolving treatment construction method for urban underground engineering
CN114182578A (en) * 2021-12-31 2022-03-15 中国铁道科学研究院集团有限公司铁道建筑研究所 Layered grouting reinforcement method for ballast track bed slurry-turning and mud-pumping treatment

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109098197A (en) * 2018-09-04 2018-12-28 中电建南方建设投资有限公司 One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method
CN109811778A (en) * 2019-03-27 2019-05-28 中建四局第一建筑工程有限公司 A kind of ultra-deep foundation pit goes along with sb. to guard him water sealing structure and method
CN109881694A (en) * 2019-04-04 2019-06-14 中铁十一局集团城市轨道工程有限公司 A kind of constructing structure blocked for foundation pit substrate Sand and method
CN109881694B (en) * 2019-04-04 2024-02-06 中铁十一局集团城市轨道工程有限公司 Construction structure and method for plugging foundation pit substrate water and sand gushing
CN112031811A (en) * 2020-07-22 2020-12-04 济南力稳岩土工程有限公司 System and method for blocking cliff through water burst and grouting
CN112609722A (en) * 2020-12-09 2021-04-06 中铁二十局集团第六工程有限公司 Drainage and water leakage plugging method for deep foundation pit in sea reclamation area
CN113529683A (en) * 2021-08-12 2021-10-22 中铁十二局集团有限公司 Strong rock water-dissolving treatment construction method for urban underground engineering
CN114182578A (en) * 2021-12-31 2022-03-15 中国铁道科学研究院集团有限公司铁道建筑研究所 Layered grouting reinforcement method for ballast track bed slurry-turning and mud-pumping treatment

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