CN107060822A - The interconnection and its construction method of a kind of ventilating shaft - Google Patents

The interconnection and its construction method of a kind of ventilating shaft Download PDF

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Publication number
CN107060822A
CN107060822A CN201710209201.6A CN201710209201A CN107060822A CN 107060822 A CN107060822 A CN 107060822A CN 201710209201 A CN201710209201 A CN 201710209201A CN 107060822 A CN107060822 A CN 107060822A
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CN
China
Prior art keywords
interconnection
parts
steel grating
construction
fender post
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CN201710209201.6A
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Chinese (zh)
Inventor
郭峰
刘国胜
施建禄
张禹
祝青峰
刘新新
徐勇
冯雷
滕非
Original Assignee
中铁城建集团第三工程有限公司
中铁城建集团有限公司
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Priority to CN201710209201.6A priority Critical patent/CN107060822A/en
Publication of CN107060822A publication Critical patent/CN107060822A/en

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26Silicates of the alkali metals
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/003Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/107Reinforcing elements therefor; Holders for the reinforcing elements
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/15Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
    • E21D11/152Laggings made of grids or nettings
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/02Supporting means, e.g. shuttering, for filling-up materials
    • E21F15/04Stowing mats; Goaf wire netting; Partition walls
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482Coating or impregnation materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/27Water resistance, e.g. waterproof or water-repellant materials

Abstract

The invention discloses a kind of interconnection of ventilating shaft and its construction method, the interconnection of the ventilating shaft includes:Agent structure, fender post and filling brick wall, filling brick wall is filled in the gap between agent structure and fender post, bonded between filling brick wall and agent structure using bonding concrete, bond in concrete and lay two layers of reinforced mesh, reinforced mesh is closely connected with fender post.This method comprises the following steps:1) advanced tubule is set;2) using two kinds of slurries alternating slip castings in same advanced tubule;3) construction of the agent structure of ventilating shaft and fender post;4) hole is excavated;And 5) water-proofing treatment.The present invention ventilating shaft interconnection and its construction method, its quick construction, effectively, excellent security performance and water resistance can be realized.

Description

The interconnection and its construction method of a kind of ventilating shaft
Technical field
The present invention relates to the realm of building construction, the interconnection and its construction method of more particularly to a kind of ventilating shaft.
Background technology
Prior art is during constructing metro tunnel, as shown in figure 1, need to set fender post in constructing tunnel region, On the one hand in order to prevent basic landslide, influence on the other hand is produced on the basis of Adjacent Buildings in order to prevent from constructing.Meanwhile, Before construction, in addition it is also necessary to carry out the precipitation of construction area.During construction, ventilating shaft is excavated first, and pouring reinforcement concrete serves as ventilating shaft Agent structure, after the agent structure of ventilating shaft reaches design strength, you can carry out the excavation work of interconnection.
When interconnection is excavated, even if having carried out the construction of fender post and precipitation before, but still can not be complete The infiltration caved in underground water of ground is avoided entirely.
Per-fore pouring liquid with small pipe can be typically carried out before excavation in the prior art, advanced tubule is stable excavation work A kind of very effective auxiliary construction method in face.Advanced tubule can play reinforcement effect to ravelly ground, strengthen after slip casting The loose, stability of weak surrounding rock, be conducive to after completing to excavate with the stabilization for completing country rock in preliminary bracing time, be unlikely to Wall rock destabilization destruction is until cave in.Usually cement mortar or the cement mortar injected in the prior art using advanced tubule, but It is that its consolidation rate is relatively low compared with the intensity after slow, consolidation, while its water resistance is poor.After slip casting, often occur in passage The situation of the even basic partial collapse of infiltration, detrimental effect is brought to construction safety and construction speed.
Accordingly, it would be desirable to a kind of have the per-fore pouring liquid with small pipe liquid for consolidating the excellent properties such as fast, intensity is high, waterproof is good, with Ensure supporting safety during interconnection construction.
The content of the invention
The technical problems to be solved by the invention are to provide the interconnection and its construction method of a kind of ventilating shaft, its by In advanced tubule injection improvement after dual slurry and interconnection inwall smear water-repellent paint, it is achieved thereby that condense Hurry up, the technique effect that intensity is high, waterproof is good, by point the bench excavation soil body and a substep supporting, ensured the construction of interconnection Safety.
The technical problems to be solved by the invention are achieved through the following technical solutions:
A kind of interconnection of ventilating shaft, the interconnection of the ventilating shaft includes:Agent structure, fender post and filling brick Wall, the filling brick wall is filled in the gap between the agent structure and the fender post, it is described filling brick wall with it is described Bonded between agent structure using bonding concrete, two layers of reinforced mesh, the reinforcing bar are laid in the cohesive concrete Mesh sheet is closely connected with the fender post.
Preferably, in above-mentioned technical proposal, the hole of the filling brick wall sets up steel grating of the two ends provided with anchoring pin, institute The anchoring pin of steel grating is stated by the way that in the anchor rod anchored soil body to the filling brick wall and thereafter, two of the steel grating anchor 0.6m is spaced between pin interim cross-brace is set, to strengthen the supporting performance of steel grating.
Preferably, in above-mentioned technical proposal, the reinforcing bar of the fender post welds jail by " L " shape reinforcing bar and the steel grating Gu.
A kind of construction method of the interconnection of ventilating shaft, comprises the following steps:1) advanced tubule is set;2) same super Using two kinds of slurries alternating slip castings in preceding ductule;3) construction of the agent structure of ventilating shaft and fender post;4) hole is excavated;And 5) water-proofing treatment.
Preferably, in above-mentioned technical proposal, the step 1) be specially:The accurate position for making interconnection after surveying setting-out Put, draw outline excavation, along excavation contour line outside interval 250mm set advanced tubule, advanced tubule avoids fender post, adopts The mode laterally promoted with rig is constructed, and the elevation angle is 12-15 °.
Preferably, in above-mentioned technical proposal, the step 2) be specially:Using two kinds of slurries in same advanced tubule Alternately the mode of injection is carried out, wherein:
First slurries:It is 1 by mass ratio:0.8:0.15 A liquid, B liquid and the first additive are well mixed to be made, wherein:A Liquid is the water glass solution of 20-35 Baume degrees, and modulus is 2.15-2.35;B liquid is 20%-30% industrial phosphoric acid solution;First Additive be by mass ratio be 1:0.4:0.08 calcium chloride, bentonite and silica flour composition;
Second slurries:It is 1 by mass ratio:0.8:0.15 A' liquid, C liquid and the second additive are well mixed to be made, wherein: A' liquid is the water glass solution of 20-30 Baume degrees, and modulus is 2.1-2.3;C liquid is that water and cement are (1-1.5) according to mass ratio: 1 cement mortar prepared;Second additive be by mass ratio be 1:0.3:0.18 calcium chloride, flyash and copper sulphate composition;
The A liquid and the A' liquid are preferably the water glass solution of 24 Baume degrees, and the mass ratio of C liquid reclaimed water and cement is preferred For 1.2:1.
Retrusive slip casting method is used in same advanced tubule, interval 0.5m is implanted sequentially the first slurries and the second slurry Liquid, is initially injected the first slurries, and grouting pressure is controlled in 0.5-1.0Mpa, and flow rate of grouting is 6-8L/min;After retrogressing 0.5m, Continue to inject the second slurries, grouting pressure controls 1.1-1.4Mpa, and flow rate of grouting is 12-14L/min;0.5m is retreated again, is noted Enter the first slurries, circulate successively, after the completion of can be moved to next slip casting position.
Preferably, in above-mentioned technical proposal, the step 3) be specially:After slip casting is completed 12 hours, interconnection is excavated In the range of the soil body to the position of fender post, then carry out filling brick wall between the agent structure and fender post of ventilating shaft in gap Construction, is bonded between filling brick wall and agent structure using bonding concrete;Wherein:It is 1 that concrete, which is bonded, by mass ratio: (1.5-1.7):(0.6-0.7):(0.05-0.06):(0.02-0.03):(0.01-0.02):The silicate cement of (0.2-0.3) Mud, particle diameter are made for 1-1.5cm cobble, middle sand, thickener, accelerator, water reducer and water are well mixed, mass ratio preferably For 1:1.7:0.6:0.052:0.023:0.02:0.27.
Preferably, in above-mentioned technical proposal, the step 4) hole excavate and comprise the following steps:
41) cut 1/2 pile body of the fender post in the range of top bar and excavate the soil body of respective thickness, in the pile body cut In the range of set up steel grating of the two ends provided with anchoring pin, the anchoring pin of steel grating is by anchor rod anchored into surrounding soil;Then, Cut remaining 1/2 pile body of the fender post in the range of top bar and excavate the soil body of respective thickness, two ends are set up again and are provided with anchor Gu the steel grating of pin, the anchoring pin of steel grating is by anchor rod anchored into surrounding soil;Reinforcing bar in fender post passes through " L " shape steel Muscle and steel grating firm welding;
42) foundation soil in the range of top bar is excavated, 0.3m is spaced according to the method described above steel grating is set;
43) top bar construction surface is excavated after 2 meters, is cut 1/2 pile body of fender post in the range of getting out of a predicament or an embarrassing situation and is excavated corresponding The soil body of thickness, sets up steel grating of the two ends provided with anchoring pin in the range of the pile body cut, and the anchoring pin of steel grating passes through anchor Bar is anchored in surrounding soil;Then, cut remaining 1/2 pile body of the fender post in the range of getting out of a predicament or an embarrassing situation and excavate respective thickness The soil body, sets up steel grating of the two ends provided with anchoring pin, the anchoring pin of steel grating is by anchor rod anchored into surrounding soil again;
44) soil body in the range of getting out of a predicament or an embarrassing situation is excavated to the position flushed with top bar excavation face, is spaced according to the method described above 0.3m sets steel grating;
45) bar-mat reinforcement is hung on steel grating, and sprays anchoring concrete, concrete layer is formed;Concrete is anchored by water Mud, fine sand, silica flour, accelerator, water reducer and water are 1 according to mass ratio:(0.6-0.65):(0.3-0.33):(0.05- 0.07):(0.04-0.05):(0.3-0.37) is mixed together, and mass ratio preferably is 1:0.63:0.32:0.06:0.04: 0.3。
Preferably, in above-mentioned technical proposal, the step 5) water-proofing treatment include:Treat concrete layer harden 48 hours with Afterwards, water-repellent paint is smeared on the inwall of interconnection;Wherein, the water-repellent paint includes following parts by weight of component:Pitch 62- 73 parts, SBS6-7 parts, 70-83 parts of bentonite, 30-36 parts of agstone, 0.1-0.15 parts of manganese nitrate, 15-20 parts of styrene-butadiene emulsion, 4-5 parts of methyl formate, 30-33 parts of water, the component for preferably including following parts by weight is mixed:70 parts of pitch, SBS6 parts, swelling 75 parts of soil, 33 parts of agstone, 0.15 part of manganese nitrate, 18 parts of styrene-butadiene emulsion, 4 parts of methyl formate, 32 parts of water.
Preferably, in above-mentioned technical proposal, the advanced tubule is that length is 2.5 meters, a diameter of 30mm steel welded tube, Coniform, the not perforate in 30cm from the rear end of its front end 10cm length, remainder is by the 15cm quincunx laying diameter 6.5mm's of spacing Slurry outlet.
Above-mentioned technical proposal of the present invention, has the advantages that:
The present invention ventilating shaft interconnection construction method interconnection construction method, its quick construction, effectively, Excellent security performance and water resistance can be realized.
Brief description of the drawings
Fig. 1 is the arrangement schematic diagram of the interconnection of existing ventilating shaft.
Fig. 2 is the plan of the interconnection of ventilating shaft of the present invention.
Fig. 3 is the schematic diagram of interconnection outline excavation of the present invention and advanced tubule arrangement.
Fig. 4 is the schematic diagram of the top bar of interconnection of the present invention and construction surface of getting out of a predicament or an embarrassing situation.
Fig. 5 is the schematic diagram after top bar of the present invention is excavated.
Fig. 6 is schematic diagram after excavating of the invention of getting out of a predicament or an embarrassing situation.
Fig. 7 A are the schematic diagrames cut with Bracing Process of fender post of the present invention.
Fig. 7 B are the schematic diagrames cut with Bracing Process of fender post of the present invention.
Fig. 7 C are the schematic diagrames cut with Bracing Process of fender post of the present invention.
Fig. 7 D are the schematic diagrames cut with Bracing Process of fender post of the present invention.
Fig. 8 is schematic cross-section of the present invention using the interconnection after supporting steel grating and bonding concrete.
Wherein, 1- tunnels;10- top bars;2- changeover portions;20- gets out of a predicament or an embarrassing situation;3- ventilating shafts;31- agent structures;4- is laterally logical Road;5- fender posts;6- advanced tubules;7- fills fragment of brick;8- steel gratings;81- anchor poles;82- concrete layers.
Embodiment
The specific embodiment of the present invention is described in detail below, in order to further understand the present invention.
All experimental methods used are conventional method unless otherwise specified in following examples.
Fig. 1 is the arrangement schematic diagram of the interconnection of existing ventilating shaft.As shown in the figure:Part in constructing metro tunnel 1 it is constructing tunnel face in sectional view, figure, 3 is ventilating shaft, 4 is interconnection, 2 is connection ventilating shaft 3 and the changeover portion of interconnection 4 (being generally known as ingate, be generally also considered as a part for interconnection).
Fig. 2 is the plan of the interconnection of ventilating shaft of the present invention.As shown in the figure:
A kind of interconnection of ventilating shaft, including:Agent structure 31, fender post 5 and filling brick wall 7, filling brick wall 7 are filled In gap between agent structure 31 and fender post 5, carried out between filling brick wall 7 and agent structure 31 using bonding concrete Bond, bond in concrete and lay two layers of reinforced mesh, reinforced mesh is closely connected with fender post 5.
The hole for filling brick wall 7 sets up steel grating 8 of the two ends provided with anchoring pin, and the anchoring pin of steel grating 8 passes through anchor pole 81 Anchor in filling brick wall 7 and the soil body thereafter, interval 0.6m, which is set, between two anchoring pin of steel grating 8 interim laterally props up Support, to strengthen the supporting performance of steel grating.The reinforcing bar of fender post 5 passes through " L " shape reinforcing bar and the firm welding of steel grating 8.
Fig. 3 is the schematic diagram of interconnection outline excavation of the present invention and advanced tubule arrangement.Fig. 4 is of the invention laterally logical The schematic diagram of the top bar in road and construction surface of getting out of a predicament or an embarrassing situation.Fig. 5 is the schematic diagram after top bar of the present invention is excavated.Fig. 6 is the present invention The schematic diagram got out of a predicament or an embarrassing situation after excavating.Fig. 7 A are the schematic diagrames cut with Bracing Process of fender post of the present invention.Fig. 7 B are the present invention The schematic diagram cut with Bracing Process of fender post.Fig. 7 C are the schematic diagrames cut with Bracing Process of fender post of the present invention.Figure 7D is the schematic diagram cut with Bracing Process of fender post of the present invention.Fig. 8 is the present invention using supporting steel grating and bonds coagulation The schematic cross-section of interconnection after soil.As shown in the figure:
A kind of construction method of the interconnection of ventilating shaft, specifically includes following steps:
(1) the accurate position for making interconnection after surveying setting-out, draws outline excavation, along excavation contour line outside be spaced 250mm sets advanced tubule 6, and advanced tubule avoids fender post, can use a diameter of 30mm steel welded tube, and its length is 2.5 rice.Advanced tubule is constructed by the way of rig is laterally promoted, and the elevation angle is 12-15 °.As needed, it is small in advance to lead The front end of pipe 6 can make not perforate in the coniform of 10cm length, 30cm from the rear end, remainder can by 15cm spacing plum Flower-shape lays diameter 6.5mm slurry outlet.Certainly, the length and shape of advanced tubule 6 of the invention are not limited thereto, this Art personnel can voluntarily adjust as needed.As shown in Figure 3.
(2) inject dual slurry into advanced tubule to reinforce surrounding soil, dual slurry point solution-type (A, B liquid group Into) and suspended type (A', C liquid composition).Suspended type slurries are based on cement, the strong additive of admixture injection, it is adaptable to weak Cohesive soil, the filling in the crack of sand gravel layer.Solution-type slurries are based on waterglass, and the strong additive of admixture injection is applicable Post processing improved in sand gravel layer etc..On the one hand additive in slurries improves slurries, strengthens the injection of slurries;The opposing party Shrinkage after face reduction grout cures, it is ensured that slip casting and water-stagnating effect.For different stratum, can first it be limited during slip casting Property slip casting, slurries rate of set is fast, can determine range of grouting according to setting time.Slurries have very strong permeability to soil layer, adopt It can make range of grouting manual control with the method for regulation grout coordinate ratio and grouting pressure;Setting time can be adjusted, and with compound Injection construction.
The present invention is carried out in same advanced tubule by the way of two kinds of slurries alternately inject, wherein:
First slurries:It is 1 by mass ratio:0.8:0.15 A liquid, B liquid and the first additive are well mixed to be made.
A liquid is the water glass solution of 20~35 Baume degrees, preferably 24 Baume degrees, and its modulus is preferably 2.15-2.35.Mould Number is an important physical parameter of water glass solution, refers to the ratio between molecular number of silica and sodium oxide molybdena in solution.One As for, modulus is bigger, and gel is fast, concrement intensity is high;Modulus is small, and gel is slow, concrement low intensity.After waterglass hardening Main component is Silica hydrogel and solid, and specific surface area is big, with higher cohesive force and stronger acid-resisting;
Industrial phosphoric acid solution that B liquid is 20%~30%, preferred content are 24%;
First additive be by mass ratio be 1:0.4:0.08 calcium chloride, bentonite and silica flour composition;Chlorine therein Change calcium to play a part of cementing and filling pore with waterglass reaction generation silica gel and gel of calcium silicate, make the strong of soil Degree and bearing capacity are improved;Bentonite can improve the uniformity and stability of slurries, prevent the generation of precipitation and segregation phenomenon; Silica flour primarily serves acidproof effect.
Second slurries:It is 1 by mass ratio:0.8:0.15 A' liquid, C liquid and the second additive are well mixed to be made.
A' liquid is the water glass solution of 20-30 Baume degrees, preferably 24 Baume degrees, and its modulus is preferably 2.1-2.3;
C liquid is that water and cement are (1~1.5) according to mass ratio:1 cement mortar prepared, preferred mass ratio are 1.2:1;
Second additive be by mass ratio be 1:0.3:0.18 calcium chloride, flyash and copper sulphate composition;Powder therein Coal ash enables to mixture to have more preferable cohesiveness and plasticity, and can improve the later strength of gel;Sulfuric acid Copper can effectively realize the function of waterproof with waterglass formation waterproofing agent.
Add after above-mentioned additive, the gel strength and water resistance of slurries can be significantly increased.
Retrusive slip casting method is used during slip casting in advanced tubule and 0.5m is spaced and is implanted sequentially the first slurries and second Slurries, are initially injected the first slurries, grouting pressure control is 0.5~1.0Mpa (being preferably 0.7Mpa), and flow rate of grouting is 6-8L/ min;Retreat after 0.5m, continue to inject the second slurries, grouting pressure controls 1.1~1.4Mpa (being preferably 1.2Mpa), slip casting Flow is 12-14L/min;Retreat after 0.5m, circulate successively, after the completion of can be moved to next slip casting position.
(3) after slip casting is completed 12 hours, the soil body in the range of interconnection is excavated to the position of fender post, is then led The construction of filling brick wall 7 between body structure 31 and fender post 5 in gap, using viscous between filling brick wall 7 and agent structure 31 Knot concrete is bonded, to strengthen the bonding strength between fender post and agent structure, it is ensured that when fender post is blocked, ventilating shaft Structure and filling brick wall can form effective support to basis.Preferably, bond in concrete and lay two layers of bar-mat reinforcement of Φ 6.5 Piece, and be closely connected with fender post by dowel.As shown in Fig. 2 the hole of filling brick wall 7 can set up two ends provided with anchoring pin Steel grating 8 (two Pin about point), the anchoring pin of steel grating 8 passes through anchor rod anchored into filling brick wall and the soil body thereafter.
Preferably, cohesive concrete therein is 1 by mass ratio:(1.5-1.7):(0.6-0.7):(0.05-0.06): (0.02-0.03):(0.01-0.02):Cobble, middle sand, thickening that portland cement, the particle diameter of (0.2-0.3) are 1-1.5cm Agent, accelerator, water reducer and water are well mixed to be made.It is highly preferred that bond concrete in, portland cement, cobble, middle sand, Thickener, accelerator, the mass ratio of water reducer and water are 1:1.7:0.6:0.052:0.023:0.02:0.27.
(4) excavation at hole
Abolished in two times to reduce the fender post in the range of the influence to building enclosure, hole, whole interconnection Excavation is also classified into top bar 10 and 20 two construction surface progress of getting out of a predicament or an embarrassing situation.As shown in Figure 4.
First, cut 1/2 pile body of the fender post in the range of top bar and excavate the soil body of respective thickness, in the stake cut Steel grating 8 (upper Pin steel grating, refer to Fig. 8) of the two ends provided with anchoring pin is set up in the range of body, the anchoring pin of steel grating 8 passes through anchor Bar 81 is anchored in surrounding soil.Then, cut remaining 1/2 pile body of the fender post in the range of top bar and excavate respective thickness The soil body, steel grating 8 of the two ends provided with anchoring pin is set up again, the anchoring pin of steel grating 8 arrives surrounding soil by anchor rod anchored In.Reinforcing bar in fender post passes through " L " shape reinforcing bar and steel grating firm welding.It is above-mentioned as shown in figures 7 a-7d.
Second, the foundation soil in the range of top bar is excavated, 0.3m is spaced according to the method described above steel grating is set.Preferably, Interim cross-brace (not shown) can also be set interval 0.6m between two anchoring pin of steel grating, to strengthen steel lattice The supporting performance of grid.The interim cross-brace can after setting completed be removed in corresponding lower Pin steel gratings.
3rd, top bar construction surface is excavated after 2 meters, is cut 1/2 pile body of fender post in the range of getting out of a predicament or an embarrassing situation and is excavated phase The soil body of thickness is answered, steel grating 8 (lower Pin steel grating, with upper Pin of the two ends provided with anchoring pin is set up in the range of the pile body cut Steel grating forms complete branch mask), the anchoring pin of steel grating 8 is by anchor rod anchored into surrounding soil.Then, leave from office is cut Remaining 1/2 pile body of fender post in order range and the soil body for excavating respective thickness, set up steel of the two ends provided with anchoring pin again Grid 8, the anchoring pin of steel grating 8 is by anchor rod anchored into surrounding soil.
4th, excavate the soil body in the range of getting out of a predicament or an embarrassing situation to the position that is flushed with top bar excavation face, according to the method described above between Every 0.3m, steel grating is set.
5th, bar-mat reinforcement is hung on steel grating 8, and anchoring concrete is sprayed, form concrete layer 82.Preferably, anchor Gu concrete is 1 according to mass ratio by cement, fine sand, silica flour, accelerator, water reducer and water:(0.6-0.65):(0.3- 0.33):(0.05-0.07):(0.04-0.05):(0.3-0.37) is mixed together.It is highly preferred that anchoring concrete is by water Mud, fine sand, silica flour, accelerator, water reducer and water are 1 according to mass ratio:0.63:0.32:0.06:0.04:0.3 mix and Into.
As shown in figure 8, it is the hole schematic cross-section after injection anchoring concrete, the restocking of excavation face inwall is provided with steel Grid 8, be divided into above and below two Pin, it is in medium position respectively by anchor rod anchored into surrounding soil.Reinforcing bar is hung on steel grating 8 Net (not shown), and anchoring concrete is sprayed, form concrete layer.
(5) water-proofing treatment
After concrete layer is hardened 48 hours, water-repellent paint is smeared on the inwall of interconnection, prevents water from inwall Penetrate into interconnection.
Preferably, above-mentioned water-repellent paint is mixed by the component of following parts by weight:62-73 parts of pitch, SBS6-7 parts, it is swollen Moisten 70-83 parts of soil, 30-36 parts of agstone, 0.1-0.15 parts of manganese nitrate, 15-20 parts of styrene-butadiene emulsion, 4-5 parts of methyl formate, water 30-33 parts.It is highly preferred that above-mentioned water-repellent paint is mixed by the component of following parts by weight:70 parts of pitch, SBS6 parts, swelling 75 parts of soil, 33 parts of agstone, 0.15 part of manganese nitrate, 18 parts of styrene-butadiene emulsion, 4 parts of methyl formate, 32 parts of water.
In construction, push ahead successively according to the method described above, you can complete the construction operation of whole interconnection.Using this The construction method of the interconnection of invention, its quick construction, effectively, excellent security performance and water resistance can be realized.
Although the present invention is disclosed as above with embodiment, so it is not intended to limit the present invention, any people in the art Member, without departing from the spirit and scope of the present invention, can make a variety of selections and modification, therefore the protection model of the present invention Enclose and limited by claims and its equivalents.

Claims (10)

1. a kind of interconnection of ventilating shaft, it is characterised in that the interconnection of the ventilating shaft includes:Agent structure (31), go along with sb. to guard him Stake (5) and filling brick wall (7), the filling brick wall (7) are filled in the seam between the agent structure (31) and fender post (5) In gap, bonded between the filling brick wall (7) and the agent structure (31) using bonding concrete, the cohesive coagulation Two layers of reinforced mesh is laid in soil, the reinforced mesh is closely connected with the fender post (5).
2. the interconnection of the ventilating shaft according to right 1, it is characterised in that the hole of the filling brick wall (7) sets up two ends Steel grating (8) provided with anchoring pin, the anchoring pin of the steel grating (8) anchors to the filling brick wall (7) by anchor pole (81) Thereafter in the soil body, interval 0.6m sets interim cross-brace between two anchoring pin of the steel grating (8), to strengthen steel The supporting performance of grid.
3. the interconnection of the ventilating shaft according to right 1, it is characterised in that the reinforcing bar of the fender post (5) passes through " L " shape steel Muscle is welded to connect with the steel grating (8).
4. according to the construction method of the interconnection of any described ventilating shafts of claim 1-3, it is characterised in that including following step Suddenly:1) advanced tubule is set;2) using two kinds of slurries alternating slip castings in same advanced tubule;3) agent structure of ventilating shaft With the construction of fender post;4) hole is excavated;And 5) water-proofing treatment.
5. the construction method of the interconnection of ventilating shaft according to claim 4, it is characterised in that the step 1) it is specific For:The accurate position for making interconnection, draws outline excavation after surveying setting-out, along excavation contour line outside interval 250mm set Advanced tubule, advanced tubule avoids fender post, is constructed by the way of rig is laterally promoted, and the elevation angle is 12-15 °.
6. the construction method of the interconnection of ventilating shaft according to claim 4, it is characterised in that the step 2) it is specific For:Carried out in same advanced tubule by the way of two kinds of slurries alternately inject, wherein:
First slurries:It is 1 by mass ratio:0.8:0.15 A liquid, B liquid and the first additive are well mixed to be made, wherein:A liquid is The water glass solution of 20-35 Baume degrees, modulus is 2.15-2.35;B liquid is 20%-30% industrial phosphoric acid solution;First is additional Agent be by mass ratio be 1:0.4:0.08 calcium chloride, bentonite and silica flour composition;
Second slurries:It is 1 by mass ratio:0.8:0.15 A' liquid, C liquid and the second additive are well mixed to be made, wherein:A' liquid For the water glass solution of 20-30 Baume degrees, modulus is 2.1-2.3;C liquid is that water and cement are (1-1.5) according to mass ratio:1 matches somebody with somebody The cement mortar of system;Second additive be by mass ratio be 1:0.3:0.18 calcium chloride, flyash and copper sulphate composition;
The A liquid and the A' liquid are preferably the water glass solution of 24 Baume degrees, and the mass ratio of C liquid reclaimed water and cement is preferably 1.2:1.
Retrusive slip casting method is used in same advanced tubule, interval 0.5m is implanted sequentially the first slurries and the second slurries, first The first slurries are first injected, grouting pressure is controlled in 0.5-1.0Mpa, and flow rate of grouting is 6-8L/min;Retreat after 0.5m, continue The second slurries are injected, grouting pressure controls 1.1-1.4Mpa, and flow rate of grouting is 12-14L/min;Retreat 0.5m again, injection the One slurries, are circulated successively, after the completion of can be moved to next slip casting position.
7. the construction method of the interconnection of ventilating shaft according to claim 4, it is characterised in that the step 3) it is specific For:After slip casting is completed 12 hours, the soil body in the range of interconnection is excavated to the position of fender post, then carry out the body junction of ventilating shaft The construction of filling brick wall between structure and fender post in gap, is carried out between filling brick wall and agent structure using bonding concrete Bond;Wherein:It is 1 that concrete, which is bonded, by mass ratio:(1.5-1.7):(0.6-0.7):(0.05-0.06):(0.02-0.03): (0.01-0.02):The portland cement of (0.2-0.3), cobble, middle sand, thickener, accelerator, the diminishing that particle diameter is 1-1.5cm Agent and water, which are well mixed, to be made, and mass ratio preferably is 1:1.7:0.6:0.052:0.023:0.02:0.27.
8. the construction method of the interconnection of ventilating shaft according to claim 4, it is characterised in that the step 4) hole Excavation comprises the following steps:
41) cut 1/2 pile body of the fender post in the range of top bar and excavate the soil body of respective thickness, in the pile body scope cut Steel grating of the interior erection two ends provided with anchoring pin, the anchoring pin of steel grating is by anchor rod anchored into surrounding soil;Then, cut Remaining 1/2 pile body of fender post in the range of top bar and the soil body for excavating respective thickness, set up two ends provided with anchoring pin again Steel grating, the anchoring pin of steel grating is by anchor rod anchored into surrounding soil;Reinforcing bar in fender post by " L " shape reinforcing bar with Steel grating firm welding;
42) foundation soil in the range of top bar is excavated, 0.3m is spaced according to the method described above steel grating is set;
43) top bar construction surface is excavated after 2 meters, is cut 1/2 pile body of fender post in the range of getting out of a predicament or an embarrassing situation and is excavated respective thickness The soil body, steel grating of the two ends provided with anchoring pin is set up in the range of the pile body cut, the anchoring pin of steel grating passes through anchor pole anchor It is affixed in surrounding soil;Then, cut remaining 1/2 pile body of the fender post in the range of getting out of a predicament or an embarrassing situation and excavate the soil of respective thickness Body, sets up steel grating of the two ends provided with anchoring pin, the anchoring pin of steel grating is by anchor rod anchored into surrounding soil again;
44) soil body in the range of getting out of a predicament or an embarrassing situation is excavated to the position flushed with top bar excavation face, and 0.3m is spaced according to the method described above Steel grating is set;
45) bar-mat reinforcement is hung on steel grating, and sprays anchoring concrete, concrete layer is formed;Concrete is anchored by cement, thin Sand, silica flour, accelerator, water reducer and water are 1 according to mass ratio:(0.6-0.65):(0.3-0.33):(0.05-0.07): (0.04-0.05):(0.3-0.37) is mixed together, and mass ratio preferably is 1:0.63:0.32:0.06:0.04:0.3.
9. the construction method of the interconnection of ventilating shaft according to claim 4, it is characterised in that the step 5) waterproof Processing includes:After concrete layer is hardened 48 hours, water-repellent paint is smeared on the inwall of interconnection;Wherein, it is described anti- Water paint includes following parts by weight of component:62-73 parts of pitch, SBS6-7 parts, 70-83 parts of bentonite, 30-36 parts of agstone, 0.1-0.15 parts of manganese nitrate, 15-20 parts of styrene-butadiene emulsion, 4-5 parts of methyl formate, 30-33 parts of water, preferably include following parts by weight Component is mixed:70 parts of pitch, SBS6 parts, 75 parts of bentonite, 33 parts of agstone, 0.15 part of manganese nitrate, styrene-butadiene emulsion 18 Part, 4 parts of methyl formate, 32 parts of water.
10. the construction method of the interconnection of ventilating shaft according to claim 4, it is characterised in that the advanced tubule Be 2.5 meters for length, a diameter of 30mm steel welded tube, coniform, the not perforate in 30cm from the rear end of its front end 10cm length is remaining By the quincunx slurry outlet for laying diameter 6.5mm of 15cm spacing.
CN201710209201.6A 2017-03-31 2017-03-31 The interconnection and its construction method of a kind of ventilating shaft CN107060822A (en)

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CN105386770A (en) * 2015-11-26 2016-03-09 中国建筑第六工程局有限公司 Backfill crossing method for shield tunneling machine passing through middle air shaft

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CN102146679A (en) * 2010-02-09 2011-08-10 中铁十一局集团有限公司 Construction method for complex geological section earth pressure balance shield passing middle air shaft
CN105155541A (en) * 2015-08-21 2015-12-16 中铁城建集团第三工程有限公司 Double-slurry closing construction method for sump
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Application publication date: 20170818