CN113958148B - Groove for repairing reverse pressure leakage water cracks and grooving process and application thereof - Google Patents

Groove for repairing reverse pressure leakage water cracks and grooving process and application thereof Download PDF

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Publication number
CN113958148B
CN113958148B CN202111347848.8A CN202111347848A CN113958148B CN 113958148 B CN113958148 B CN 113958148B CN 202111347848 A CN202111347848 A CN 202111347848A CN 113958148 B CN113958148 B CN 113958148B
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groove
crack
omega
shaped
shaped groove
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CN113958148A (en
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廖树彬
刘国华
戴书陶
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Keshun Building Repair Technology Co ltd
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Keshun Building Repair Technology Co ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6801—Fillings therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6806—Waterstops
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

The scheme belongs to the technical field of waterproof repair and discloses a groove for repairing a crack of water leakage back to pressure, a grooving process and application thereof. The groove for repairing the crack of the back pressure leakage water is formed on the surface layer of the main structure with the crack by taking the trend of the crack as a central line, and comprises an omega-shaped groove with a rough surface, and the cross section profile of the omega-shaped groove is omega-shaped. By structural design of the groove for repairing the cracks, the groove is designed into an omega-shaped groove with an omega-shaped cross section profile, and the groove has an anchoring effect due to the omega-shaped cross section structure, so that the reverse resistance pressure of the rear plugging filler is greatly enhanced; the omega-shaped outline promotes the slurry to be filled more fully, increases the bonding area between the groove and the filler, prolongs the water permeable path, and is more beneficial to improving the waterproof effect; thereby overcoming the problem of the prior back surface pressure grouting and the explosion of the groove, enhancing the integral strength of the groove and ensuring the effectiveness of the subsequent construction.

Description

Groove for repairing reverse pressure leakage water cracks and grooving process and application thereof
Technical Field
The scheme belongs to the technical field of waterproof repair, and particularly relates to a groove for repairing a crack of water leakage back to pressure, a grooving process and application thereof.
Background
Due to the effects of internal and external stress, thermal expansion, cold contraction and the like, the building structure often generates deformation and cracking phenomena to form cracks, and if water in the external environment contacts and enters the cracks, the water leakage phenomenon occurs in the using space of the building structure.
For repairing the leakage water cracks, the prior art generally adopts the modes of seam expanding, grooving, drilling and grouting for treatment, and specifically comprises the following steps: firstly slotting at the crack, then arranging a plurality of grouting nozzles distributed at intervals in the slot along the trend of the crack, then filling the slot with a plugging material, simultaneously fixing the grouting nozzles, grouting the crack through the grouting nozzles under a certain pressure, removing the grouting nozzles after grouting is finished, continuously filling the slot completely with the plugging material, and finally performing waterproof treatment on the whole body. Among them, a common technique for slotting is to open V-shaped grooves or U-shaped grooves along a slit.
However, the cross section of the V-shaped groove or the U-shaped groove is in an outward opening state gradually increasing from inside to outside, and the plugging material filled in the V-shaped groove or the U-shaped groove is adhered to the surface of the V-shaped groove or the U-shaped groove only by the adhesion force. In the grouting process, the grouting material forms a reaction force to the plugging material in the V-shaped groove or the U-shaped groove and the grouting nozzle from the crack outwards, once the grouting operation is improperly controlled, the pipe explosion phenomenon is easy to occur, so that the pipe explosion phenomenon can be aggravated only by simple low-pressure grouting, the construction failure is easy to cause after the grouting pressure exceeds 0.5MPa, the crack can not be fully filled through the injection of the follow-up grouting material, and the leakage probability is increased instead. Even if grouting operation is finished, water flow in the external environment can form reaction force to the plugging material in the V-shaped groove or the U-shaped groove outwards from cracks in the use process after repair, and particularly under the condition that reverse pressure water leakage exists, once the reaction force is not resisted by the adhesive force between the plugging material and the surface of the V-shaped groove or the U-shaped groove, the plugging material is easily pushed out to separate from the V-shaped groove or the U-shaped groove, so that the repair structure is invalid.
Therefore, it is necessary to provide a new slotting technique.
Disclosure of Invention
In view of the above, the present solution aims to overcome at least one of the disadvantages in the prior art, and provides a groove for repairing a crack caused by back pressure water leakage, which improves the phenomenon of explosion of the existing back surface pressure grouting, enhances the overall strength of the groove body, and ensures the effectiveness of subsequent construction.
In order to solve the technical problems, the following technical scheme is adopted:
in a first aspect, a groove for repairing a crack of a reverse pressure leakage water is formed in a surface layer of a main structure with a crack by taking a crack trend as a central line, the groove comprises an omega-shaped groove with a rough surface, and the cross section profile of the omega-shaped groove is omega-shaped.
The groove for repairing the cracks is structurally designed, the groove is designed into the omega-shaped groove with the omega-shaped cross section profile, the width of the omega-shaped groove is gradually reduced from inside to outside and then gradually enlarged, so that the groove can resist grouting pressure and water pressure in the back direction, simultaneously, the filler filled into the groove can also protect the groove bearing the grouting pressure and the water pressure in the back direction, the structure is stable, the compressive strength is high, no matter in the grouting process or in the subsequent use process, even if slurry or water flow generates outward thrust to the filler in the omega-shaped groove, the omega-shaped groove is difficult to destroy, the filler is pushed out of the omega-shaped groove, and the omega-shaped groove is unchanged under the action of 1.8MPa grouting pressure, so that the problems of pipe explosion and repairing failure are solved. Because the omega-shaped groove has higher compressive strength, higher grouting pressure can be adopted during grouting, so that slurry is promoted to fill cracks more fully, and the plugging effect is improved.
The omega-shaped cross section profile enables the omega-shaped groove to have larger surface area, the bonding area between the omega-shaped groove and the filler is larger, the water permeable path is lengthened, the waterproof effect is improved, meanwhile, the rough surface further lengthens the water permeable path, and the waterproof effect is better. The omega-shaped cross-sectional profile also allows the omega-shaped groove to have a longer profile line, which is advantageous for a more filled slurry.
The omega-shaped groove comprises a trapezoidal groove body and a C-shaped groove body, wherein the trapezoidal upper bottom of the groove body is connected with the C-shaped opening of the groove body, a groove neck is formed between the groove body and the groove body, the maximum width W1 of the groove body and the maximum width W3 of the groove body are larger than the width W2 of the groove neck, and the maximum width W3 of the groove body is larger than the maximum width W1 of the groove body. The depth H of the notch and the depth H of the omega-shaped groove satisfy the following conditions: h=0.2h, in other words, the depth of the notch is about one fifth of the overall depth of the omega-shaped groove, which is beneficial to ensuring the structural stability of the notch and facilitating grooving construction.
Maximum width W of notch 1 Width W of neck of groove 2 The depth H of the omega-shaped groove is as follows: w (W) 1 ＝H，W 2 = (0.6-0.8) H, in other words, the inclination angle α of the notch is between 45 ° and 64 °. The greater the inclination angle alpha of the notch, the stronger the capability of resisting the extrusion acting force from the filler, but the protection effect of the filler is relatively weakened, and the structural stability of the notch is improved when the inclination angle alpha of the notch is 45-64 degrees.
Maximum width W of groove body 3 The depth H of the omega-shaped groove is as follows: w (W) 3 = (1.6-1.8) H, i.e. the width of the tank body is 1H greater than the width of the tank neck, which is beneficial to improving the anchoring effect of the filler at the place, and forming an anchoring structure which resists slurry and water flow forcefully. Generally, the depth H of the omega-shaped groove is 40-60 mm so as to meet construction requirements, such as a buried grouting nozzle and the like.
In this scheme, omega shape groove can use alone, also can use with current fluting mode jointly. For the latter, the groove comprises a plurality of sections of omega-shaped grooves and also comprises a plurality of sections of V/U-shaped grooves, wherein the cross section profile of the V/U-shaped groove is in a V/U shape, and the plurality of sections of V/U-shaped grooves and the plurality of sections of omega-shaped grooves are distributed alternately and are connected in series.
According to the scheme, on the basis of an existing slotting mode, a section of omega-shaped slots are additionally arranged at intervals, so that slots in which V/U-shaped slots and omega-shaped slots are distributed alternately are formed. The slotting process of the V/U-shaped groove is relatively simple, and the construction efficiency is high, so that the slotting efficiency of the scheme is reduced less; the omega-shaped groove has higher compressive strength, and is used as an anchoring point in the scheme, so that the capacity of the groove for resisting grouting pressure and back water pressure is improved, the grouting pressure can be controlled to be higher, slurry is more fully filled in cracks, and the plugging effect is improved.
In order to balance the contradiction problem between the compressive strength and the construction efficiency, the length of each section of V/U-shaped groove is 800-1200 mm, the length L of each section of omega-shaped groove is more than or equal to the depth H of the omega-shaped groove, at the moment, the optimal balance is achieved between the rise of the compressive strength of the groove and the fall of the grooving efficiency, so that the construction efficiency is ensured, the grouting pressure is improved, the crack is filled more fully by the slurry, and the plugging effect is improved.
In a second aspect, a grooving process for a groove for repairing a crack of water leakage from a back pressure includes the steps of:
cutting and widening the cracks on two sides of at least part of the cracks to form trapezoid notches;
deep chiseling and widening cracks at the bottom of the notch to form a C-shaped groove body, and forming an omega-shaped groove with the notch;
and (5) roughening the omega-shaped groove.
The scheme adopts a mode of firstly expanding the slot, then downwards digging and then expanding the slot to carry out slotting, the slot expanding step basically determines the width of the slot, the inclined slot is also formed, the downwards digging step determines the depth of the slot, and then the slot expanding step is carried out on the basis to determine the width of the slot body, so that the shape of the omega-shaped slot is basically determined. The size of a part of the groove is determined in each step of the process, and the groove is formed according to the process, so that the omega-shaped groove meeting the requirements can be formed efficiently.
For a slot combining the existing slotting mode, the slotting process further comprises the following steps:
the two sides of the other part of the crack are cut to widen the crack, so that V/U-shaped grooves which are distributed alternately with the omega-shaped grooves are formed;
and (5) roughening the V/U-shaped groove.
In the scheme, the forming step of the V/U-shaped groove can be earlier than the omega-shaped groove or can be later than the omega-shaped groove, and for the scheme of combining the V-shaped grooves, the V-shaped groove can be directly formed on the whole crack, the upper part of the V-shaped groove is used as the notch of the omega-shaped groove, and the steps of digging and expanding the formed omega-shaped groove are completed on the basis. The roughening treatment for the omega-shaped groove and the V/U-shaped groove can be performed after the corresponding groove is formed, or can be uniformly performed after the whole groove is formed.
In a third aspect, a crack repairing structure for reverse pressure leakage water comprises a main body structure with a crack and a groove, a plugging structure filled in the crack and an anchoring structure filled in the groove, wherein the bottom of the groove is communicated with the crack. Wherein the groove is an omega-shaped groove or a combination of the omega-shaped groove and a V/U-shaped groove.
According to the scheme, the omega-shaped groove is built on the crack, whether the whole section is set to be the omega-shaped groove or the omega-shaped groove is set at a point, slurry filled in the groove can be clamped and fixed with the groove after being solidified, the anchoring effect is achieved, an anchoring structure is formed, higher grouting pressure and back water pressure can be resisted, and the occurrence probability of pipe explosion groove is effectively reduced. Moreover, as the anchoring structure can resist higher grouting pressure, the high grouting pressure can promote the slurry to fill the cracks more fully, so that a full plugging structure is formed in the cracks, the plugging structure is combined with the cracks more tightly, and the plugging effect is greatly improved.
In order to further improve the repairing effect of the repairing structure, the surface of the main body structure is provided with a waterproof layer at least covering the groove, the joint between the anchoring structure and the groove is sealed, and the anchoring structure is protected, so that the anchoring structure is prevented from being damaged and leaking again.
In a fourth aspect, a construction method for repairing a crack of water leakage from a back to pressure includes the steps of:
cleaning attachments on the surface of the crack to expose the crack;
along the trend of the crack, cutting and widening the crack to form a groove;
embedding a fixed grouting nozzle in the groove;
grouting into the crack through a grouting nozzle until grouting is completed;
removing the grouting nozzle;
plugging the groove and performing waterproof treatment on the groove.
Wherein, the grouting pressure is controlled to be 1-1.5 MPa.
Compared with the prior art, the scheme has the following beneficial effects: by structural design of the groove for repairing the cracks, the groove is designed into an omega-shaped groove with an omega-shaped cross section profile, and the groove has an anchoring effect due to the omega-shaped cross section structure, so that the reverse resistance pressure of the rear plugging filler is greatly enhanced; the omega-shaped outline promotes the slurry to be filled more fully, increases the bonding area between the groove and the filler, prolongs the water permeable path, and is more beneficial to improving the waterproof effect; thereby overcoming the problem of the prior back surface pressure grouting and the explosion of the groove, enhancing the integral strength of the groove and ensuring the effectiveness of the subsequent construction.
Drawings
The drawings are for illustrative purposes only and are not to be construed as limiting the present solution; for better illustration of the present solution, some parts of the figures may be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the positional relationship described in the drawings is for illustrative purposes only and is not to be construed as limiting the present solution.
Fig. 1 is a schematic diagram of the structure of an omega-shaped groove.
Fig. 2 is a schematic cross-sectional view of an omega-shaped groove.
Fig. 3 is a schematic diagram of stress analysis of omega-shaped grooves and their filling.
Fig. 4 is a schematic view of the structure of V-groove + omega-groove.
Fig. 5 is a top view of V-groove + omega-groove.
Fig. 6 is a schematic view of the structure of the U-shaped groove + omega-shaped groove.
Fig. 7 is a top view of a U-shaped groove + omega-shaped groove.
Fig. 8 is a schematic structural view of a repair structure using omega-shaped grooves.
Fig. 9 is a schematic structural view of a repair structure using V-grooves+Ω -grooves.
Fig. 10 is a schematic structural view of a repair structure using U-grooves+Ω -grooves.
Reference numerals illustrate: the body structure 1000, the slit 1100, the omega-shaped groove 1210, the first portion 1211 of the filler, the second portion 1212 of the filler, the v-shaped groove 1220, the u-shaped groove 1230, the occluding structure 2100, and the anchoring structure 2200.
Detailed Description
The novel grooving technology is used for repairing the leakage water cracks, is particularly suitable for repairing the reverse pressure leakage water cracks, and solves the technical problems that the pipe explosion and the groove explosion occur easily in the grouting process, the crack is difficult to be filled due to too small grouting pressure, and the secondary leakage occurs easily in the subsequent use process through the structural design of the groove. The present solution is described in further detail below in connection with specific embodiments.
As shown in fig. 1-2, the present embodiment provides a groove for repairing a crack of a reverse pressure leakage water, which is formed on a surface layer of a main body structure 1000 having a crack 1100 with the direction of the crack 1100 as a center line. The grooves include omega-shaped grooves 1210 having a roughened surface, the cross-sectional profile of the omega-shaped grooves 1210 being omega-shaped.
In this embodiment, the main body structure 1000 is a structure indicating that the crack 1100 is generated and water leakage occurs, including but not limited to a concrete structure. The direction of the crack 1100 refers to the direction of extension of the crack 1100 that can be observed from the surface of the body structure 1000, and the cross section refers to the cross section perpendicular to the direction of the crack 1100.
In this embodiment, the groove for repairing the crack 1100 is structurally designed into an omega-shaped groove 1210 with an omega-shaped cross section profile, the width of the omega-shaped groove 1210 gradually decreases from inside to outside (from the deep part of the main structure 1000 to the surface of the main structure 1000) and then gradually expands, and the groove is formed on the side surface of the grooveForming a convex structure; accordingly, the filler that fills the omega-shaped groove 1210 and solidifies formed will have an omega-shaped cross-section. As shown in fig. 3, since the cross-sectional profile of the bump structure is like a triangle, when the filler is forced by an external force to form a pushing force F on the bump structure, the bump structure will form a friction force F on the filler 1 And reaction force F N1 The direction of the combined force of the two is opposite to the direction of the thrust F, so that a part of the thrust F is counteracted, and the stress of the main body structure 1000 at the opening of the omega-shaped groove 1210 is weakened; taking the convex structure as a watershed, regarding the fillers at two sides of the watershed as a first part 1211 near the bottom of the omega-shaped groove 1210 and a second part 1212 at the opening of the omega-shaped groove 1210, when the first part 1211 of the filler is subjected to external force to generate thrust force on the convex structure, the first part 1211 of the filler is influenced by the constraint force t of the first part 1211 of the filler on the second part 1212, and the second part 1212 of the filler plays a role in protecting the convex structure; therefore, due to the structural stability of the Ω -shaped groove 1210, even if slurry or water flow generates an outward thrust to the filler in the Ω -shaped groove 1210, it is difficult to destroy the Ω -shaped groove 1210 and push the filler out of the Ω -shaped groove 1210, so that the compressive strength is greatly improved, and compared with the conventional V-shaped groove 1220 which can only accept 0.3-0.5 MPa grouting pressure, the Ω -shaped groove 1210 has no change under the grouting pressure of 1.8MPa, so that the problems of pipe explosion and repair failure are solved. Because the omega-shaped groove 1210 has higher compressive strength, higher grouting pressure can be adopted during grouting, so that slurry is promoted to more fully fill the crack 1100, and the plugging effect is improved.
The omega-shaped cross section profile enables the omega-shaped groove 1210 to have larger surface area, the bonding area between the omega-shaped groove and the filler is larger, the water permeable path is lengthened, the water proof effect is improved, meanwhile, the rough surface further lengthens the water permeable path, and the water proof effect is better. The omega-shaped cross-sectional profile also allows the omega-shaped groove 1210 to have a longer profile line, which facilitates a more filled slurry.
Specifically, the omega-shaped groove 1210 with gradually reduced width from inside to outside and gradually enlarged width comprises a trapezoid notch and a C-shaped groove body, wherein the trapezoid upper bottom of the notch and the groove body are respectively provided withThe C-shaped openings of the groove bodies are connected, a groove neck is formed between the groove opening and the groove bodies, and the maximum width W of the groove opening 1 Maximum width W of the groove body 3 Greater than the width W of the neck 2 Maximum width W of the groove body 3 Greater than the maximum width W of the notch 1 . Wherein, the liquid crystal display device comprises a liquid crystal display device,
the depth H of the notch and the depth H of the omega-shaped groove 1210 satisfy: h=0.2h, in other words, the depth of the notch is about one fifth of the overall depth of the Ω -shaped groove 1210, which is beneficial to ensuring the structural stability of the notch and facilitating grooving construction.
Maximum width W of notch 1 Width W of neck of groove 2 And the depth H of the omega-shaped groove 1210: w (W) 1 ＝H，W 2 = (0.6-0.8) H, in other words, the inclination angle α of the notch is between 45 ° and 64 °. The greater the inclination angle alpha of the notch, the stronger the capability of resisting the extrusion acting force from the filler, but the protection effect of the filler is relatively weakened, and the structural stability of the notch is improved when the inclination angle alpha of the notch is 45-64 degrees.
Maximum width W of groove body 3 And the depth H of the omega-shaped groove 1210: w (W) 3 = (1.6-1.8) H, i.e. the width of the tank is 1H greater than the width of the tank neck, which is advantageous for improving the anchoring action of the filler therein, forming an anchoring structure 2200 that is strong against slurry and water flow. Generally, the depth H of the omega-shaped groove 1210 is 40-60 mm to meet construction requirements, such as embedded grouting nozzles.
For the groove shown in fig. 1, this embodiment provides a grooving process, including the following steps:
s11, cutting and widening the crack 1100 at two sides of the crack 1100 to form a trapezoid notch;
s12, deep chiseling and widening the crack 1100 inwards at the bottom of the notch to form a C-shaped groove body, and forming an omega-shaped groove 1210 with the notch;
s13, roughening the omega-shaped groove 1210.
In this embodiment, slotting is performed by adopting a mode of firstly expanding slots and then downwards digging and then expanding slots, the slot expanding step basically determines the width of the slot, the inclined slot is also formed, the downwards digging step determines the depth of the slot, and then the slot expanding step is performed on the basis to determine the width of the slot body, so that the shape of the omega-shaped slot 1210 is basically determined. Each step of the process separately sizes a portion of the slot, and grooving according to the process can efficiently produce the desired omega-shaped slot 1210.
Step S11 may be performed in a manner of opening the V-shaped groove 1220, where a portion of the V-shaped groove 1220 near the opening is a notch of the Ω -shaped groove 1210; the step S12 specifically includes: firstly, deep chiseling to depth H by using a 0.6H wide flat drill, and then widening two sides by changing the 1.2-1.4H wide flat drill.
As shown in fig. 4 to 5, the present embodiment provides another groove for repairing a reverse pressure leakage crack, and further includes a V-shaped groove 1220, in which the cross-sectional profile of the V-shaped groove 1220 is V-shaped, as compared with the groove for repairing a reverse pressure leakage crack shown in fig. 1. Specifically, the groove includes a plurality of omega-shaped grooves 1210 and a plurality of V-shaped grooves 1220, wherein the plurality of V-shaped grooves 1220 and the plurality of omega-shaped grooves 1210 are alternately distributed and connected in series.
Because the V-shaped groove 1220 does not have the characteristic of clamping and fixing the filler, when the V-shaped groove is subjected to the action of back water pressure or grouting pressure, the phenomenon of groove explosion often occurs, the grouting pressure is generally controlled to be 0.3-0.5 MPa in the grouting process, when the grouting pressure is stabilized to be 0.8MPa, the notch begins to emit slurry, and the phenomenon of groove explosion occurs when the grouting pressure reaches 1 MPa. In order to enhance the compressive strength of the groove, in this embodiment, on the basis of the existing grooving mode, an Ω groove 1210 is added at intervals to form grooves in which the V grooves 1220 and the Ω grooves 1210 are alternately distributed. The grooving process of the V-shaped groove 1220 is relatively simple, and the construction efficiency is high, so that the grooving efficiency of the embodiment is reduced less; the omega-shaped groove 1210 has higher compressive strength, and in this embodiment is used as an anchor point to improve the ability of the groove to resist grouting pressure and water pressure from the back, so that the grouting pressure can be controlled to be higher, which is beneficial for the slurry to fill the crack 1100 more fully, and the plugging effect is improved.
In order to balance the contradiction between the compressive strength and the construction efficiency, the length of each V-shaped groove 1220 is preferably 800-1200 mm, and the length L of each omega-shaped groove 1210 is equal to or greater than the depth H of the omega-shaped groove 1210. Compared with the single V-shaped groove 1220, when the length of each section of V-shaped groove 1220 is 1000mm, namely, one section of omega-shaped groove 1210 is formed every 1000mm, the length L of each section of omega-shaped groove 1210 is equal to the depth H of each section of omega-shaped groove 1210, the grouting pressure in the grouting process can be controlled to be 1-1.5 MPa, the notch of the V-shaped groove 1220 starts to emit slurry after the pressure is stabilized at 1.5MPa, the V-shaped groove 1220 is exploded at 1.8MPa, and the omega-shaped groove 1210 is unchanged at the moment, so that the opening of the omega-shaped groove 1210 is beneficial to the slurry to more fully fill the crack 1100, and the plugging effect is greatly improved.
For the groove shown in fig. 4, this embodiment provides a grooving process, including the following steps:
s21, cutting and widening the crack 1100 at two sides of the crack 1100 to form a V-shaped groove 1220;
s22, deep chiseling and widening the crack 1100 inwards at the lower part of a part of the V-shaped groove 1220 at intervals to form a C-shaped groove body, and forming an omega-shaped groove 1210 with a notch (the upper part of the V-shaped groove 1220);
s22, roughening the V-shaped grooves 1220 and the omega-shaped grooves 1210.
Wherein, the upper portion of the V-shaped groove 1220 formed by cutting in step S21 may be used as the notch of the Ω -shaped groove 1210.
For the slot shown in fig. 4, this embodiment provides another slotting process, including the steps of:
s30, cutting and widening the crack 1100 at two sides of the part of the crack 1100 to form a V-shaped groove 1220;
s31, cutting and widening the crack 1100 on two sides of the other part of the crack 1100 to form trapezoid notches which are distributed alternately with the V-shaped grooves 1220;
s32, deep chiseling and widening the crack 1100 inwards at the bottom of the notch to form a C-shaped groove body, and forming an omega-shaped groove 1210 with the notch;
s33. roughening the V-shaped grooves 1220 and the Ω -shaped grooves 1210.
Step S30 may be performed before step S31, may be performed simultaneously with step S31, or may be performed after step S31 or S32; step S33 may be performed after the formation of the corresponding grooves, or may be performed uniformly after the formation of the entire grooves.
As shown in fig. 6 to 7, the present embodiment provides another groove for repairing a crack of water leakage facing away from pressure, and further includes a U-shaped groove 1230, compared with the groove shown in fig. 1, the cross-sectional profile of the U-shaped groove 1230 is U-shaped. Specifically, the slot includes a plurality of omega-shaped slots 1210 and a plurality of U-shaped slots 1230, wherein the plurality of U-shaped slots 1230 and the plurality of omega-shaped slots 1210 are distributed at intervals and are connected in series.
In order to enhance the compressive strength of the groove, in this embodiment, on the basis of the existing grooving mode, an Ω groove 1210 is added at intervals, so as to form grooves in which the U-shaped groove 1230 and the Ω groove 1210 are distributed at intervals. The slotting process of the U-shaped groove 1230 is relatively simple, and the construction efficiency is high, so that the slotting efficiency of the embodiment is reduced less; the omega-shaped groove 1210 has higher compressive strength, and in this embodiment is used as an anchor point to improve the ability of the groove to resist grouting pressure and water pressure from the back, so that the grouting pressure can be controlled to be higher, which is beneficial for the slurry to fill the crack 1100 more fully, and the plugging effect is improved.
In order to balance the contradiction problem between the compressive strength and the construction efficiency, the length of each section of U-shaped groove 1230 is 800-1200 mm, the length L of each section of omega-shaped groove 1210 is more than or equal to the depth H of the omega-shaped groove 1210, at this time, the optimal balance between the rise of the compressive strength of the groove and the fall of the grooving efficiency is achieved, which is beneficial to ensuring the construction efficiency and improving the grouting pressure, so that the slurry can more fully fill the crack 1100, thereby improving the plugging effect.
For the groove shown in fig. 6, this embodiment provides a grooving process, including the steps of:
s40, cutting and widening the crack 1100 at two sides of the part of the crack 1100 to form a U-shaped groove 1230;
s41, cutting and widening the crack 1100 at two sides of the other part of the crack 1100 to form a trapezoid notch;
s42, deep chiseling and widening the crack 1100 inwards at the bottom of the notch to form a C-shaped groove body, and forming an omega-shaped groove 1210 with the notch;
s42, roughening the U-shaped groove 1230 and the omega-shaped groove 1210.
Wherein, part of the cracks 1100 and the other part of the cracks 1100 are distributed in multiple sections at intervals and are connected in series; step S40 may be performed before step S41, may be performed simultaneously with step S41, or may be performed after step S41 or S42; step S43 may be performed after the formation of the corresponding grooves, or may be performed uniformly after the formation of the entire grooves.
As shown in fig. 8 to 10, the present embodiment provides a crack repairing structure for reverse pressure leakage water, which includes a main body structure 1000 having a crack 1100 and a groove, a blocking structure 2100 filled in the crack 1100, and an anchor structure 2200 filled in the groove, wherein the bottom of the groove is communicated with the crack 1100. The grooves may be omega-shaped grooves 1210 (fig. 8), V-shaped grooves 1220 (fig. 9) with omega-shaped grooves 1210 added at intervals, or U-shaped grooves 1230 (fig. 10) with omega-shaped grooves 1210 added at intervals.
In this embodiment, the omega-shaped groove 1210 is built on the crack 1100, whether the whole section is set as the omega-shaped groove 1210 or the omega-shaped groove 1210 is set at a point, the slurry filled in the groove can be clamped with the groove after solidification, and has an anchoring effect, so that an anchoring structure 2200 is formed, higher grouting pressure and back water pressure can be resisted, and the occurrence probability of pipe explosion groove can be effectively reduced. Moreover, since the anchor structure 2200 can resist higher grouting pressures, the high grouting pressures can promote the slurry to more fully fill the crack 1100, thereby forming a full plugging structure 2100 in the crack 1100, being more tightly combined with the crack 1100, and greatly improving the plugging effect.
To further improve the repair effect of the repair structure, the surface of the main body structure 1000 is provided with a waterproof layer covering at least the groove, seals the junction between the anchor structure 2200 and the groove, and protects the anchor structure 2200 from leakage again due to the damage of the anchor structure 2200.
For the reverse pressure water leakage crack 1100, the embodiment provides a construction method, which includes the following steps:
s51, cleaning attachments on the surface of the crack 1100 to expose the crack 1100;
s52, along the trend of the crack 1100, cutting and widening the crack 1100 to form a groove;
s53, embedding a fixed grouting nozzle in the groove;
s54, grouting into the crack 1100 through a grouting nozzle until grouting is completed;
s55, removing the grouting nozzle;
s56, plugging the groove and performing waterproof treatment on the groove.
Wherein, the grouting pressure in the step S54 is controlled to be 1-1.5 MPa.
It is apparent that the above examples of the present solution are merely examples for clearly illustrating the present solution and are not limiting of the embodiments of the present solution. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present solution should be included in the protection scope of the present solution claims.

Claims (10)

1. A groove for repairing a crack of water leakage back to pressure is formed on the surface layer of a main structure with the crack by taking the trend of the crack as a central line, and is characterized by comprising an omega-shaped groove with a rough surface, wherein the cross section profile of the omega-shaped groove is omega-shaped and comprises a trapezoid notch and a C-shaped groove body, the trapezoid upper bottom of the notch is connected with the C-shaped opening of the groove body, a groove neck is formed between the notch and the groove body, and the maximum width W of the notch is equal to the maximum width W of the groove body 1 Maximum width W of the groove body 3 Greater than the width W of the groove neck 2 Maximum width W of the groove body 3 The depth H of the omega-shaped groove is as follows: w (W) 3 =（1.6~1.8）H。
2. The groove for repairing a reverse pressure water leakage crack as claimed in claim 1, wherein the maximum width W of the groove body 3 Greater than the maximum width W of the notch 1 。
3. The groove for repairing a reverse pressure water leakage crack as claimed in claim 2,
the depth H of the notch and the depth H of the omega-shaped groove satisfy the following conditions: h=0.2h; and/or
Maximum width W of the notch 1 Neck of grooveWidth W of (2) 2 The depth H of the omega-shaped groove is as follows: w (W) 1 =H，W 2 =（0.6~0.8）H。
4. A tank for repairing a reverse pressure water leakage crack according to any one of claims 1 to 3, wherein the tank comprises a plurality of sections of omega-shaped tanks, and further comprises a plurality of sections of V/U-shaped tanks, the cross section profile of each V/U-shaped tank is V/U-shaped, and the plurality of sections of V/U-shaped tanks and the plurality of sections of omega-shaped tanks are alternately distributed and are connected in series.
5. The groove for repairing a reverse pressure water leakage crack as claimed in claim 4, wherein the length of each V/U-shaped groove is 800-1200 mm, and the length L of each omega-shaped groove is equal to or greater than the depth H of the omega-shaped groove.
6. A grooving process for a groove for repairing a reverse pressure water leakage crack according to any one of claims 1 to 5, comprising the steps of:
cutting and widening the cracks on two sides of at least part of the cracks to form trapezoid notches;
deep chiseling and widening the crack inwards at the bottom of the notch to form a C-shaped groove body, and forming an omega-shaped groove with the notch;
and roughening the omega-shaped groove.
7. The grooving process for a groove for repairing a crack due to pressure leakage as claimed in claim 6, further comprising the steps of:
cutting two sides of the other part of the crack to widen the crack, so as to form V/U-shaped grooves which are distributed alternately with the omega-shaped grooves;
and roughening the V/U-shaped groove.
8. A structure for repairing a crack caused by back pressure leakage water, which is characterized by comprising a main body structure with a crack and the groove according to any one of claims 1-5, a plugging structure filled in the crack and an anchoring structure filled in the groove, wherein the bottom of the groove is communicated with the crack.
9. A construction method of the reverse pressure water leakage crack repairing structure according to claim 8, comprising the steps of:
cleaning attachments on the surface of the crack to expose the crack;
cutting and widening the crack along the trend of the crack to form the groove;
embedding a fixed grouting nozzle in the groove;
grouting into the crack through the grouting nozzle until grouting is completed;
removing the grouting nozzle;
the groove is blocked and subjected to a waterproofing treatment.
10. The construction method of the reverse pressure water leakage crack repairing structure according to claim 9, wherein the grouting pressure is controlled to be 1-1.5 mpa.
CN202111347848.8A 2021-11-15 2021-11-15 Groove for repairing reverse pressure leakage water cracks and grooving process and application thereof Active CN113958148B (en)

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