CN109505556B - Method for repairing defects of expansion grouting pipe and tunnel lining concrete - Google Patents

Method for repairing defects of expansion grouting pipe and tunnel lining concrete Download PDF

Info

Publication number
CN109505556B
CN109505556B CN201811250022.8A CN201811250022A CN109505556B CN 109505556 B CN109505556 B CN 109505556B CN 201811250022 A CN201811250022 A CN 201811250022A CN 109505556 B CN109505556 B CN 109505556B
Authority
CN
China
Prior art keywords
expansion
sleeve
polyurethane
weight
glue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811250022.8A
Other languages
Chinese (zh)
Other versions
CN109505556A (en
Inventor
佘海龙
耿春雷
郭宝树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Hongruijia Technology Co ltd
Original Assignee
Beijing Hongruijia Science & Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Hongruijia Science & Technology Co ltd filed Critical Beijing Hongruijia Science & Technology Co ltd
Priority to CN201811250022.8A priority Critical patent/CN109505556B/en
Publication of CN109505556A publication Critical patent/CN109505556A/en
Application granted granted Critical
Publication of CN109505556B publication Critical patent/CN109505556B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3225—Polyamines
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/428—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for squeeze cementing, e.g. for repairing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only

Abstract

The invention discloses a method for repairing defects of an expansion grouting pipe and tunnel lining concrete, which comprises the following steps: s10, cleaning the coring hole; s20, installing an expansion grouting pipe and an exhaust pipe; s30, manufacturing a filling material; s40, filling the filling material; s50, coating fireproof decorative materials. The method for repairing the defects of the tunnel lining concrete adopts light filling materials (such as polyurethane foaming materials, epoxy materials, light mortar and the like) and professional construction equipment, and adopts a pressure injection, pressure maintaining and pressure control system. The invention is composed of a secondary block falling prevention construction process, a convenient support process, coating of polymer mortar for preventing contact net spark combustion and the like, and has the characteristics of low volume weight of materials, high binding force, high curing speed, light construction equipment, simple tool process, no need of templates and supports and the like.

Description

Method for repairing defects of expansion grouting pipe and tunnel lining concrete
Technical Field
The invention relates to a repairing process of an expansion grouting pipe and a tunnel lining concrete coring hole, in particular to a repairing method of defects of tunnel lining concrete.
Background
China is a mountainous country, so the tunnel quantity is also very large. In the construction of tunnel lining (secondary lining), due to the special vault crown position, the arrangement of a blocking hole and a reserved pouring hole is unreasonable in the construction, the slump of pumping concrete is high, the pressure control of the pumping concrete is not good, the concrete shrinks, the unevenness of the support and other reasons inevitably cause the situation that the secondary lining vault crown is not tightly attached to the primary concrete building support surface, and the phenomena of void, cavity and the like are easily generated in the concrete capping of the arch part.
Due to the defects of the secondary lining, the stress of the lining is uneven, the stress condition of the lining is worsened, the stress state of the lining design is changed, the actual stress of the lining possibly exceeds the design stress range, and the probability of the tunnel lining being damaged is increased under the action of external load and the influence of other adverse factors.
For the realization to tunnel lining's detection, generally get core through coring machine drilling among the prior art, after accomplishing coring operation, need get the core hole and carry out the shutoff, but generally all adopt repair mortar to getting the shutoff in core hole among the prior art, this kind of shutoff method has certain hidden danger to the safe operation of train afterwards in practical application, specifically embodies:
1. the concrete bonding force problem of new and old interfaces exists by adopting the repair mortar for repair. Meanwhile, due to the fact that the volume weight of the mortar is large (the density of the mortar is 2200 kg/cubic meter generally), the sagging gravity is large, and the danger of falling blocks of the tunnel exists.
2. Even to getting the core hole defect and adopting the mode that loose stone around polishing does not repair, though considered the dangerous hidden danger of having solved tunnel and falling the piece afterwards, but influenced the outward appearance nature of the quality of tunnel, the existence of getting the core hole simultaneously can lead to the hidden danger of tunnel seepage afterwards, and the main expression form is: if the waterproof plate is damaged in paving and welding, water leakage often occurs at the weak place of a concrete structure and the place of a core hole in rainy seasons with large rainwater.
Disclosure of Invention
The present invention aims to provide a method for repairing defects of expansive slip casting pipes and tunnel lining concrete, which solves at least one of the above technical problems.
The technical scheme adopted by the invention for solving the technical problems is as follows: an expansion grouting pipe comprises a sleeve, a fixing plate, an expansion conical head, an expansion rod, an expansion bolt, a tray and a fixing nut;
one end of the sleeve is provided with at least one sleeve notch along the axial direction;
a fixing plate is arranged on the inner side wall of the sleeve, and a through hole is formed in the middle of the fixing plate;
the radius of the expansion conical head is gradually reduced from left to right, and the diameter of the expansion conical head is larger than the inner diameter of the sleeve; one end of the expansion rod is fixed at the end with the smaller diameter of the expansion conical head, and the other end of the expansion rod penetrates through the fixed plate and is positioned at the right part of the fixed plate;
an external thread is formed on the expansion rod, an expansion bolt is sleeved on the expansion rod, and the expansion bolt is matched with the external thread of the expansion rod;
an external thread is formed on the outer wall surface of the other end of the sleeve, a tray and a fixing nut are sleeved on the other end of the sleeve, and the fixing nut is matched with the external thread of the sleeve to fix the tray on the outer surface of concrete;
the other end of the sleeve is also provided with a grouting hole, and the side wall of the sleeve is provided with a plurality of through holes, so that slurry entering the sleeve through the grouting hole is discharged to the outside of the expansion grouting pipe through the through holes in the side wall of the sleeve.
Optionally, the number of the sleeve gaps is 4, and the four sleeve gaps are uniformly distributed along the circumferential direction of the sleeve.
Optionally, the fixing plate is arranged along an axis perpendicular to the sleeve.
The invention also adopts the following technical scheme for solving the technical problems: a method of repairing a defect in tunnel lining concrete, comprising:
s10, clearing the coring holes: removing dust on the inner wall of the coring hole by adopting high-pressure gas;
s20, installing an expansion grouting pipe and an exhaust pipe: inserting the expansion grouting pipe into the coring hole for more than 20cm, and fixing the expansion grouting pipe;
s30, manufacturing a filling material, wherein the filling material is epoxy resin glue, acrylic resin or polyurethane spraying hard foam glue, and the polyurethane spraying hard foam glue comprises first polyurethane spraying hard foam glue and second polyurethane spraying hard foam glue;
s40, filling the filling material: injecting epoxy resin glue or acrylic resin into the coring hole by using a grouting machine; or spraying a first polyurethane spraying hard foam glue and a second polyurethane spraying hard foam glue produced in the S30 by adopting a two-component pneumatic glue gun, and filling a polyurethane foaming body into the core taking hole through the glue spraying hole; when the filling material flows out of the exhaust pipe, closing the exhaust pipe, keeping the pressure of 0.2MPa, closing the grouting machine, or stopping injecting the polyurethane foam;
s50, coating fireproof decorative materials: after the glue spraying is finished, an angle grinder is used for cutting off the exhaust pipe and the expansion grouting pipe which are exposed outside the polyurethane foaming body, and 1-2mm of fireproof decoration material is smeared on the surface of the polyurethane foaming body.
Optionally, the first polyurethane spray coating hard foam comprises 80-95% by weight of MDI polymer and 5-20% by weight of isocyanate monomer.
Optionally, the second polyurethane spray hard foam comprises 40-55% by weight of binary polyether polyol; 20-27% by weight of a ternary polyether polyol; 5-8% by weight of a glycol chain extender; 2-5% by weight of diamine cross-linking agent; 0.5-1% by weight of a coupling agent; 0.2 to 0.5% by weight of a catalyst; 1-2% by weight of a foam stabilizer; 10-15% by weight of a flame retardant; 3-5% of color paste; and 0.2-0.5% by weight of water.
Optionally, S30 includes: adding MDI polymer into a reaction kettle, adding isocyanate monomer under stirring, stirring for 5-10min under the condition of filling nitrogen and sealing, subpackaging, filling nitrogen and sealing.
Optionally, S30 includes:
(1) adding binary polyether polyol, ternary polyether polyol, a diol chain extender and a diamine cross-linking agent in proportion into a reaction kettle, heating to 100-120 ℃, dehydrating for 1-2h under high vacuum until the water content is lower than 0.05%, and then cooling to 30-40 ℃;
(2) sequentially adding the flame retardant, the color paste, the water and the foam stabilizer into the mixture obtained in the step (1) at the stirring speed of 600 revolutions per minute, and continuously stirring for 15-20 minutes until the color is uniform;
(3) and (3) reducing the stirring speed in the step (2) by 300 r/min, sequentially adding the coupling agent and the catalyst, continuously stirring for 5-10min, and uniformly stirring to complete the production, subpackaging and sealing of the second polyurethane spraying hard foam rubber.
The invention has the following beneficial effects: compared with the prior art, the method for repairing the defects of the tunnel lining concrete has the following advantages:
(1) the invention adopts the expansion grouting pipe to realize the repair of the coring hole, the expansion grouting pipe has the integrated function of grouting and fixing the baffle, and the problem that the baffle is difficult to fix in the past is solved. Namely, the expansion grouting pipe has the functions of expansion fixation and expansion grouting pipe, compared with the traditional support frame, the method greatly saves time, manpower and material resources, and does not damage the surfaces of the two liners.
(2) The high-strength polyurethane spraying hard foam is adopted to replace polymer mortar and epoxy mortar, and the high-strength polyurethane spraying hard foam has low volume weight and good binding force. The invention reduces the risk of block falling caused by the volume weight of the material, and simultaneously, the polyurethane spraying hard foam body and the implanted expansion clamp form a whole by anchoring the expansion clamp bolt device in advance to form double-layer protection.
(3) The surface of the polyurethane spraying hard foam body is smeared with the highly-bonded inorganic mortar protective cover surface, so that the danger of spark combustion of a polyurethane spraying hard foam body contact net of an organic system can be effectively prevented.
Drawings
FIG. 1 is a schematic structural view of an expanding grout pipe of the present invention;
FIG. 2 is a schematic view of the present invention showing the use of the expansion grouting pipe;
the notation in the figures means: 1-a sleeve; 2, fixing a plate; 3-expansion cone head; 4-an expansion rod; 5-expansion bolts; 6-a tray; 7-fixing the nut; 8-grouting holes; 9-exhaust pipe.
Detailed Description
The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings.
Example 1
The embodiment provides an expansion grouting pipe, which comprises a sleeve, a fixing plate, an expansion conical head, an expansion rod, an expansion bolt, a tray and a fixing nut;
one end of the sleeve is provided with at least one sleeve notch along the axial direction; in this embodiment, the number of the sleeve gaps is 4, and the four sleeve gaps are uniformly distributed along the circumferential direction of the sleeve.
The inner side wall of the sleeve is provided with a fixing plate, preferably, the fixing plate is arranged along an axis perpendicular to the sleeve, and the middle of the fixing plate is provided with a through hole.
The radius of the expansion conical head is gradually reduced from left to right, and the diameter of the expansion conical head is larger than the inner diameter of the sleeve; one end of the expansion rod is fixed at the end with the smaller diameter of the expansion conical head, and the other end of the expansion rod penetrates through the fixing plate and is positioned at the right part of the fixing plate.
The expansion rod is provided with external threads, the expansion rod is sleeved with an expansion bolt, the expansion bolt is matched with the external threads of the expansion rod, when the expansion bolt rotates, the expansion rod can be pulled to move linearly, so that the sleeves with the sleeve gaps at one ends expand, and the expansion grouting pipes are fixed.
And an external thread is formed on the outer wall surface of the other end of the sleeve, a tray and a fixing nut are sleeved on the other end of the sleeve, and the fixing nut is matched with the external thread of the sleeve to fix the tray on the outer surface of the concrete.
The other end of the sleeve is also provided with a grouting hole for grouting into the sleeve through the grouting hole, and the side wall of the sleeve is provided with a plurality of through holes, so that the slurry entering the sleeve through the grouting hole is discharged to the outside of the expansion grouting pipe through the through holes.
When the expansion grouting pipe is used, the expansion grouting pipe firstly extends into a position of a coring hole more than 20cm, the expansion bolt is screwed to expand the top end of the sleeve, the sleeve can be tightly fixed in the coring hole, then the tray and the exhaust hole pipe are installed, the exhaust pipe is a steel pipe or an iron pipe with the diameter of 8mm, so that grouting operation is directly performed, after grouting is completed, the tray is detached, and the redundant exhaust hole pipe and the sleeve are cut off by an angle grinder, so that the expansion grouting pipe is left in the coring hole, and the strength of slurry is improved when the coring hole is repaired, so that the safety performance is improved.
Example 2
The embodiment provides a method for repairing defects of tunnel lining concrete, wherein the defects of the tunnel lining concrete comprise tunnel lining concrete coring holes, and the method comprises the following steps:
s10 cleaning coring hole
In this embodiment, adopt high-pressure gas to clear away the dust of coring hole inner wall to when adopting filling material to fill this coring hole, can make and have good cohesion between the inner wall in filling material and coring hole.
S20, installing an expansion grouting pipe and an exhaust pipe
The expansion grouting pipe may be the one described in example 1, or another expansion grouting pipe.
When the expandable injection pipe is installed, the expandable injection pipe is first inserted into the coring hole by 20cm or more, and the expandable injection pipe is fixed.
The exhaust pipe adopts 8 mm's of diameter steel pipe or iron pipe (the pipe diameter can be selected wantonly under the condition that does not influence the exhaust and observe the head of flow), and 3mm deep troughes are cut to the top cross of exhaust pipe, and the exhaust pipe lies in to remain between the inside one end of coring hole and the waterproof board and predetermines the distance, 2cm for example.
S30 production of filling Material
In this embodiment, the filling material is a light filling material, and may be, for example, an epoxy resin adhesive, an acrylic resin, and other organic gelling materials with high strength after curing; more preferably, the filling material is polyurethane spray coating hard foam glue.
In this embodiment, the polyurethane spray rigid foam comprises a first polyurethane spray rigid foam and a second polyurethane spray rigid foam, wherein the first polyurethane spray rigid foam comprises 80-95% by weight of MDI polymer and 5-20% by weight of isocyanate monomer; the second polyurethane spray coating hard foam rubber comprises 40-55% by weight of binary polyether polyol (molecular weight 500-800); 20-27% by weight of a ternary polyether polyol (molecular weight 350-500); 5-8% by weight of a glycol chain extender; 2-5% by weight of diamine cross-linking agent; 0.5-1% by weight of a coupling agent; 0.2 to 0.5% by weight of a catalyst; 1-2% by weight of a foam stabilizer; 10-15% by weight of a flame retardant; 3-5% of color paste; 0.2-0.5% by weight of water.
More preferably, the MDI polymer is polymethylene polyphenyl polyisocyanate PAPI, and the isocyanate monomer is liquefied MDI, toluene diisocyanate TDI, or isophorone diisocyanate value IPDI.
The binary polyether polyol is polyoxypropylene glycol PPG with the molecular weight of 500-800, and the ternary polyether polyol is polyoxypropylene triol with the molecular weight of 350-500. The glycol chain extender can be ethylene glycol, diethylene glycol, 1, 4-butanediol, 1, 6-hexanediol, etc. The diamine cross-linking agent may be 3, 3 ' -dichloro-4, 4 ' -diphenylmethanediamine (MOCA), 3, 5 ' -dimethylthiotoluenediamine (E-300), 3, 5-diethyltoluenediamine (Ethacure100), or the like. The coupling agent may be an amino-containing silane coupling agent, an epoxy-containing silane coupling agent, or the like. The catalyst may be an organic tin catalyst such as dibutyltin dilaurate, stannous octoate, dibutyltin diacetate and the like or a tertiary amine catalyst such as triethylenediamine, dimethylcyclohexylamine and the like. The foam stabilizer is polyether modified organosilicon surfactant. The flame retardant is halogenated aliphatic polyhydric alcohol.
The first polyurethane spraying rigid foam glue and the second polyurethane spraying rigid foam glue have the following technical effects: (1) the curing speed is high, and the maintenance working hours are saved. (2) The material has low volume weight of 800-300 kg/cube of 1/5-1/4 with only mortar. (3) The bonding strength with concrete. (4) The compressive strength is high and reaches the same strength grade of the lining concrete. (5) The full closed pore structure has good waterproof performance. (6) The flame retardance is good.
The production process of the first polyurethane spraying hard foam adhesive comprises the following steps: adding MDI polymer into a reaction kettle, adding isocyanate monomer under stirring, stirring for 5-10min under the condition of filling nitrogen and sealing, subpackaging, filling nitrogen and sealing.
The production process of the second polyurethane spraying rigid foam adhesive comprises the following steps:
(1) adding binary polyether polyol, ternary polyether polyol, a diol chain extender and a diamine cross-linking agent in proportion into a reaction kettle, heating to 100-120 ℃, dehydrating for 1-2h under high vacuum until the water content is lower than 0.05%, and then cooling to 30-40 ℃.
(2) And (2) sequentially adding the flame retardant, the color paste, the water and the foam stabilizer into the mixture in the step (1) at the stirring speed of 600 revolutions per minute, and continuously stirring for 15-20 minutes until the color is uniform.
(3) And (3) reducing the stirring speed in the step (2) by 300 r/min, sequentially adding the coupling agent and the catalyst, continuously stirring for 5-10min, and uniformly stirring to complete the production, subpackaging and sealing of the second polyurethane spraying hard foam rubber.
S40 filling the filler
In this embodiment, when the filling material is an organic gelling material with high strength after being cured, such as epoxy resin glue and acrylic resin, the filling material may be injected into the coring hole by using a grouting machine or grouting equipment to repair the concrete defect; when the filling material flows out of the exhaust pipe, the exhaust pipe is closed, the pressure is maintained for 0.2MPa, and then the grouting machine or the grouting pipe is closed, namely the density of the filling material can be kept basically consistent and the concrete base material has sufficient wettability through the pressure control function, the bonding force between the filling material and the concrete can be increased, and the pressure maintaining pressure is different according to different materials.
When the filling material is polyurethane spraying hard foam glue:
the first polyurethane spraying hard foam glue and the second polyurethane spraying hard foam glue produced in the S30 are sprayed by a two-component pneumatic glue gun, wherein two glue cylinders of the two-component pneumatic glue gun are respectively filled with the first polyurethane spraying hard foam glue and the second polyurethane spraying hard foam glue, a 0.6/8 air pump is externally connected to provide an air source, the upper end of each glue cylinder is externally connected with a static mixing tube to spray, and a polyurethane foaming body is manufactured.
In this embodiment, the first polyurethane spray hard bubble glue and the second polyurethane spray hard bubble glue are sprayed into the coring hole through the grouting hole of the expansion grouting pipe, and when the coring hole is filled with the polyurethane foam, that is, the exhaust pipe flows out of the polyurethane foam, the exhaust pipe is closed, the pressure is maintained at 0.2MPa, the filling of the polyurethane foam into the coring hole is stopped, and at this time, the exhaust pipe is blocked by the tapered plug.
Meanwhile, a two-component grouting machine or a high-pressure two-component polyurethane spraying machine can be adopted for construction according to actual conditions.
When the first polyurethane spraying rigid foam glue and the second polyurethane spraying rigid foam glue are mixed and sprayed according to the volume ratio of 1:1, the obtained polyurethane foam has the following material properties:
Figure BDA0001841444990000071
Figure BDA0001841444990000081
s50 fireproof decorative material
And (3) after the glue spraying is finished for 30min, namely after the glue is completely cured, removing the baffle of the expansion grouting pipe, cutting off redundant exhaust pipes and expansion grouting pipes (namely, the exhaust pipes and the expansion grouting pipes exposed out of the polyurethane foaming body) by using an angle grinder, and coating 1-2mm of fireproof decorative materials on the surface, such as a polymer mortar cover or water-based epoxy mortar.
The performance requirements of the overlay mortar material are as follows:
Figure BDA0001841444990000082
the method for repairing the defects of the tunnel lining concrete has the following technical effects:
(1) the invention adopts the expansion grouting pipe to realize the repair of the coring hole, the expansion grouting pipe has the integrated function of grouting and fixing the baffle, and the problem that the baffle is difficult to fix in the past is solved. Namely, the expansion grouting pipe has the functions of expansion fixation and expansion grouting pipe, compared with the traditional support frame, the method greatly saves time, manpower and material resources, and does not damage the surfaces of the two liners.
(2) The high-strength polyurethane spraying hard foam is adopted to replace polymer mortar and epoxy mortar, and the high-strength polyurethane spraying hard foam has low volume weight and good binding force. The invention reduces the risk of block falling caused by the volume weight of the material, and simultaneously, the polyurethane spraying hard foam body and the implanted expansion clamp form a whole by anchoring the expansion clamp bolt device in advance to form double-layer protection.
(3) The surface of the polyurethane spraying hard foam body is smeared with the highly-bonded inorganic mortar protective cover surface, so that the danger of spark combustion of a polyurethane spraying hard foam body contact net of an organic system can be effectively prevented.
Example 3
The embodiment provides a method for repairing a tunnel lining concrete defect, wherein the tunnel lining concrete defect comprises a tunnel lining concrete coring hole, and the repairing method is different from the repairing method of the embodiment 2 in the components and contents of a first polyurethane spraying hard bubble gum and a second polyurethane spraying hard bubble gum, specifically, in the embodiment, the first polyurethane spraying hard bubble gum comprises 100 parts by mass of PM200 and 20 parts by weight of MDI 50; the second polyurethane spraying rigid foam adhesive comprises the following components in parts by weight: DL 1000: 42.3 of the total weight of the mixture; YRLK-100: 21.15 of; e-100: 4.1; diethylene glycol: 7.3; flame retardant DOher 6209: 14.1; foam stabilizer SD 641: 0.85; KH 560: 0.85; t12: 0.85; water: 0.35; and grey paste: 8.4.
the operable time and the foaming ratio are detected according to JC/T2041-2010 polyurethane grouting material, the foaming body density is detected according to GB/T6343 measuring foam plastic and rubber-apparent density, the compressive strength is detected according to JC/T1041 epoxy grouting material for concrete cracks, the bonding strength is detected according to GB/T16777.7A method building waterproof coating experimental method, and the flammability is detected according to GB8624-1997 building material combustion performance grading method, and the results are as follows:
serial number Item Detection value
1 Operational time 25s(22g@20℃)
2 Expansion ratio 100％
3 Density of foamed body 500 kg/cube
4 Compressive strength 9MPa
5 Adhesive strength 3.3Mpa
6 Flammability of Fire rating B1
Example 4
The embodiment provides a method for repairing a tunnel lining concrete defect, wherein the tunnel lining concrete defect comprises a tunnel lining concrete coring hole, and the repairing method is different from the repairing method of the embodiment 2 in the components and contents of a first polyurethane spraying hard bubble gum and a second polyurethane spraying hard bubble gum, specifically, in the embodiment, the first polyurethane spraying hard bubble gum comprises 100 parts by mass of PM200 and 20 parts by weight of MDI 50; the second polyurethane spraying rigid foam adhesive comprises the following components in parts by weight: DL 1000: 42.3 of the total weight of the mixture; YRLK-100: 21.15 of; e-100: 4.1; BDO: 6.2; flame retardant DOher 6209: 14.1; foam stabilizer SD 641: 0.85; KH 560: 0.85; t12: 0.85; water: 0.35; and grey paste: 8.4.
the operable time and the foaming ratio are detected according to JC/T2041-2010 polyurethane grouting material, the foaming body density is detected according to GB/T6343 measuring foam plastic and rubber-apparent density, the compressive strength is detected according to JC/T1041 epoxy grouting material for concrete cracks, the bonding strength is detected according to GB/T16777.7A method building waterproof coating experimental method, and the flammability is detected according to GB8624-1997 building material combustion performance grading method, and the results are as follows:
serial number Item Detection value
1 Operational time 23s(22g@20℃)
2 Expansion ratio 60％
3 Density of foamed body 700 kg/cube
4 Compressive strength 12MPa
5 Adhesive strength 3.5Mpa
6 Flammability of Fire rating B1
Example 5
The embodiment provides a method for repairing a tunnel lining concrete defect, wherein the tunnel lining concrete defect comprises a tunnel lining concrete coring hole, and the repairing method is different from the repairing method of the embodiment 2 in the components and contents of a first polyurethane spraying hard bubble gum and a second polyurethane spraying hard bubble gum, specifically, in the embodiment, the first polyurethane spraying hard bubble gum comprises 100 parts by mass of PM200 and 20 parts by weight of MDI 50; the second polyurethane spraying rigid foam adhesive comprises the following components in parts by weight: DL 1000: 42.3 of the total weight of the mixture; YRLK-100: 21.15 of; e-300: 5.0; BDO: 6.2; flame retardant DOher 6209: 14.1; foam stabilizer SD 641: 0.85; KH 560: 0.85; t12: 0.85; water: 0.35; and grey paste: 8.4.
the operable time and the foaming ratio are detected according to JC/T2041-2010 polyurethane grouting material, the foaming body density is detected according to GB/T6343 measuring foam plastic and rubber-apparent density, the compressive strength is detected according to JC/T1041 epoxy grouting material for concrete cracks, the bonding strength is detected according to GB/T16777.7A method building waterproof coating experimental method, and the flammability is detected according to GB8624-1997 building material combustion performance grading method, and the results are as follows:
serial number Item Detection value
1 Operational time 95s(22g@20℃)
2 Expansion ratio 50％
3 Density of foamed body 750 kg/cube
4 Compressive strength 15MPa
5 Adhesive strength 3.5Mpa
6 Flammability of Fire rating B1
The sequence of the above embodiments is only for convenience of description and does not represent the advantages and disadvantages of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (3)

1. A method for repairing defects of tunnel lining concrete is characterized by comprising the following steps:
s10, clearing the coring holes: removing dust on the inner wall of the coring hole by adopting high-pressure gas;
s20, installing an expansion grouting pipe and an exhaust pipe: inserting the expansion grouting pipe into the coring hole for more than 20cm, and fixing the expansion grouting pipe;
s30, manufacturing a filling material, wherein the filling material is epoxy resin glue, acrylic resin or polyurethane spraying hard foam glue, and the polyurethane spraying hard foam glue comprises first polyurethane spraying hard foam glue and second polyurethane spraying hard foam glue;
s40, filling the filling material: injecting epoxy resin glue or acrylic resin into the coring hole by using a grouting machine; or spraying a first polyurethane spraying hard foam glue and a second polyurethane spraying hard foam glue produced in the S30 by adopting a two-component pneumatic glue gun, and filling a polyurethane foaming body into the core taking hole through the glue spraying hole; when the filling material flows out of the exhaust pipe, closing the exhaust pipe, keeping the pressure of 0.2MPa, closing the grouting machine, or stopping injecting the polyurethane foam; and
s50, coating fireproof decorative materials: after the glue spraying is finished, cutting off the exhaust pipe and the expansion grouting pipe exposed outside the polyurethane foam body by using an angle grinder, and smearing 1-2mm of fireproof decorative material on the surface of the polyurethane foam body;
the expansion grouting pipe comprises a sleeve, a fixing plate, an expansion conical head, an expansion rod, an expansion bolt, a tray and a fixing nut;
one end of the sleeve is provided with at least one sleeve notch along the axial direction;
a fixing plate is arranged on the inner side wall of the sleeve, and a through hole is formed in the middle of the fixing plate;
the radius of the expansion conical head is gradually reduced from left to right, and the diameter of the expansion conical head is larger than the inner diameter of the sleeve; one end of the expansion rod is fixed at the end with the smaller diameter of the expansion conical head, and the other end of the expansion rod penetrates through the fixed plate and is positioned at the right part of the fixed plate;
an external thread is formed on the expansion rod, an expansion bolt is sleeved on the expansion rod, and the expansion bolt is matched with the external thread of the expansion rod;
an external thread is formed on the outer wall surface of the other end of the sleeve, a tray and a fixing nut are sleeved on the other end of the sleeve, and the fixing nut is matched with the external thread of the sleeve to fix the tray on the outer surface of concrete;
the other end of the sleeve is also provided with a grouting hole, and the side wall of the sleeve is provided with a plurality of through holes so that the slurry entering the sleeve through the grouting hole is discharged to the outside of the expansion grouting pipe through the through holes on the side wall of the sleeve;
wherein the first polyurethane spray coating rigid foam rubber comprises 80-95% by weight of MDI polymer and 5-20% by weight of isocyanate monomer; the second polyurethane spraying rigid foam rubber comprises 40-55% by weight of binary polyether polyol; 20-27% by weight of a ternary polyether polyol; 5-8% by weight of a glycol chain extender; 2-5% by weight of diamine cross-linking agent; 0.5-1% by weight of a coupling agent; 0.2 to 0.5% by weight of a catalyst; 1-2% by weight of a foam stabilizer; 10-15% by weight of a flame retardant; 3-5% of color paste; and 0.2-0.5% by weight of water.
2. The method for repairing defects in tunnel lining concrete according to claim 1, wherein S30 includes: adding MDI polymer into a reaction kettle, adding isocyanate monomer under stirring, stirring for 5-10min under the condition of filling nitrogen and sealing, subpackaging, filling nitrogen and sealing.
3. The method for repairing defects in tunnel lining concrete according to claim 2, wherein S30 includes:
(1) adding binary polyether polyol, ternary polyether polyol, a diol chain extender and a diamine cross-linking agent in proportion into a reaction kettle, heating to 100-120 ℃, dehydrating for 1-2h under high vacuum until the water content is lower than 0.05%, and then cooling to 30-40 ℃;
(2) sequentially adding the flame retardant, the color paste, the water and the foam stabilizer into the mixture obtained in the step (1) at the stirring speed of 600 revolutions per minute, and continuously stirring for 15-20 minutes until the color is uniform;
(3) and (3) reducing the stirring speed in the step (2) by 300 r/min, sequentially adding the coupling agent and the catalyst, continuously stirring for 5-10min, and uniformly stirring to complete the production, subpackaging and sealing of the second polyurethane spraying hard foam rubber.
CN201811250022.8A 2018-10-25 2018-10-25 Method for repairing defects of expansion grouting pipe and tunnel lining concrete Active CN109505556B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811250022.8A CN109505556B (en) 2018-10-25 2018-10-25 Method for repairing defects of expansion grouting pipe and tunnel lining concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811250022.8A CN109505556B (en) 2018-10-25 2018-10-25 Method for repairing defects of expansion grouting pipe and tunnel lining concrete

Publications (2)

Publication Number Publication Date
CN109505556A CN109505556A (en) 2019-03-22
CN109505556B true CN109505556B (en) 2021-08-27

Family

ID=65745967

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811250022.8A Active CN109505556B (en) 2018-10-25 2018-10-25 Method for repairing defects of expansion grouting pipe and tunnel lining concrete

Country Status (1)

Country Link
CN (1) CN109505556B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112031821B (en) * 2020-08-04 2022-08-05 北京鸿锐嘉科技发展有限公司 Reinforcing protection treatment method for tunnel lining defects
CN113773635B (en) * 2021-07-16 2022-08-05 国网电子商务有限公司 Pipe orifice sealing material and preparation method and sealing method thereof
CN113565465A (en) * 2021-07-19 2021-10-29 中铁十九局集团第六工程有限公司 Filling and pouring device for lining coring hole and construction method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103254880A (en) * 2013-03-07 2013-08-21 河南煤业化工集团研究院有限责任公司 Gas-extraction hole-sealing material
CN108222539A (en) * 2018-01-12 2018-06-29 江苏筑镹营造科技有限公司 The method of masonry component bolt anchorage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101153760B1 (en) * 2004-01-28 2012-06-13 케이에프씨 가부시키가이샤 Expandable injection bolt and grouting method using same
CN201561016U (en) * 2009-11-16 2010-08-25 屠工远 Multifunctional draw-in adjustable setscrew
CN201763348U (en) * 2010-09-17 2011-03-16 中铁十九局集团轨道交通工程有限公司 Slip casting tube
CN204898668U (en) * 2015-08-07 2015-12-23 重庆工程职业技术学院 Totally closed anchor section anchor that extends greatly
CN106498929B (en) * 2016-12-05 2018-12-21 北京鸿锐嘉科技发展有限公司 Grouting Pipe and reinforcement of concrete defect method
CN107130988B (en) * 2017-07-10 2023-08-25 中南大学 Liquid carbon dioxide blasting anti-reflection grouting composite anchor rod

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103254880A (en) * 2013-03-07 2013-08-21 河南煤业化工集团研究院有限责任公司 Gas-extraction hole-sealing material
CN108222539A (en) * 2018-01-12 2018-06-29 江苏筑镹营造科技有限公司 The method of masonry component bolt anchorage

Also Published As

Publication number Publication date
CN109505556A (en) 2019-03-22

Similar Documents

Publication Publication Date Title
CN109505556B (en) Method for repairing defects of expansion grouting pipe and tunnel lining concrete
CA1323742C (en) Method for restoring and reinforcing wooden structural component
KR100959691B1 (en) Urethane blowing composition, and a method for reinforcing structure restoration using thereof
CN111021960A (en) Method for improving stability of extraction drill hole of low-permeability soft coal seam
CN109209439B (en) Method for repairing defects of tunnel lining concrete
CN112159511B (en) Polyether polyurethane grouting material and method for treating grout pumping diseases of asphalt pavement
CN110629856A (en) Inspection well leakage repairing support tool, back pressure grouting device and repairing method
CN113153354B (en) Supporting method based on pressure-stabilizing pressure-retaining grouting and grouting control equipment
CN111809670A (en) Leaking stoppage grouting and reinforcing construction method for basement exterior wall construction joint
KR100920963B1 (en) Water leakage maintenance structure and method of joint using high efficiency grout materials
EP2706147A1 (en) Method for constructing a traffic tunnel in segment design
CN105350565A (en) Wind power plant fan tower foundation repairing and reinforcing method
CN111335665A (en) Construction method for repairing hollowing micropores of wear-resistant emery terrace
CN111809606A (en) Basement exterior wall leaking stoppage grouting and reinforcing construction method
CN108005121B (en) Non-excavation type inspection well omnibearing repairing method
CN206681773U (en) A kind of air door with self-repair function
CN114232611B (en) Filling device and filling method for karst cave in pile hole
CN112482415B (en) Consolidation grouting method for underground cavern under high external water pressure and flowing water condition
CN109763391B (en) Construction method for reinforcing base course and roadbed by single-hole composite grouting of damaged road
CN111255515A (en) Liner-containing rapid self-building water gate wall system and installation method and application thereof
CN111809668A (en) Construction method for leaking water and plugging and reinforcing periphery of foundation column of underground chamber
KR102607341B1 (en) Eco-friendly elastic coat with pva
CN218643374U (en) Distributed grouting pile forming device for miniature piles
CN212478002U (en) Non-excavation prosthetic devices of inspection shaft
CN212428173U (en) Energy-saving and environment-friendly water leakage repairing system for pipe shaft and ventilating shaft

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: No.2 Qingyuan Road, Miyun Economic Development Zone, Miyun District, Beijing

Patentee after: Beijing Hongruijia Technology Co.,Ltd.

Country or region after: China

Address before: No.2 Qingyuan Road, Miyun Economic Development Zone, Miyun District, Beijing

Patentee before: BEIJING HONGRUIJIA SCIENCE & TECHNOLOGY CO.,LTD.

Country or region before: China