CN114032750A - Cement pavement repairing method - Google Patents
Cement pavement repairing method Download PDFInfo
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- CN114032750A CN114032750A CN202111339226.0A CN202111339226A CN114032750A CN 114032750 A CN114032750 A CN 114032750A CN 202111339226 A CN202111339226 A CN 202111339226A CN 114032750 A CN114032750 A CN 114032750A
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- bag
- grouting
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- repair
- pavement
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/10—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for raising or levelling sunken paving; for filling voids under paving; for introducing material into substructure
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention belongs to the technical field of road engineering, and particularly relates to a cement pavement repairing method which comprises a bag body, an extension part and a connecting part; according to the invention, the repairing bag is placed in the area needing grouting before grouting, then grouting is carried out on the inner part of the repairing bag, and the filled slurry is wrapped by the arranged repairing bag, so that the leakage of the slurry is prevented, the grouting pressure is further ensured, the settled panel can be lifted, and the smooth pavement repairing is ensured; when grouting is not performed, the size of the repair bag is small in a folded state, so that the repair bag is more convenient to carry, and meanwhile, the folded repair bag is more fit for drilling holes by folding the bag body of the repair bag into a cylindrical shape, so that the repair bag can more easily enter a damaged part of a roadbed through the holes in the pavement slab; through setting up the extension, prevent that the downthehole card of restoration bag at the curb plate from dying, guarantee the expansion that the restoration bag can be better when slip casting, improve prosthetic quality.
Description
Technical Field
The invention belongs to the technical field of road engineering, and particularly relates to a cement pavement repairing method.
Background
The cement concrete pavement is because the intensity of self is higher, generally call rigid pavement, but because the road bed has the characteristic of certain flexibility, consequently when the disease appears in the ground of curb plate bottom, the fracture between the curb plate on upper portion generally can not, along with the collapse of ground, can make the cement pavement the ascending deflection of vertical side appear, and then can make the difference in height appear between the consecutive curb plate, and then can produce the sense of jolting at the in-process of driving a vehicle, and then cause the comfort level reduction of driving a vehicle.
In the existing treatment means, a drilling grouting mode is usually adopted to fill the foundation defects at the bottom of the pavement slab, and the sunken pavement slab is lifted by using the pressure of grouting, so that the height difference between the adjacent pavement slabs is eliminated, and the driving comfort of the pavement is improved; however, when the road slab at the edge of the road surface is grouted and lifted by adopting the traditional grouting mode, because the side of the road slab facing the empty surface (i.e. the side of the road slab close to the edge of the road, without the support of the road shoulder) has no good tightness, the grouting leakage can be caused, the grouting pressure can not meet the requirement of lifting the road slab, and the failure of cement pavement repair can be caused.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a cement pavement repairing method. The invention is mainly used for solving the problem that when the defects of the cement concrete pavement are repaired by adopting a grouting method, the defects leak at the edge of the pavement, and then the grouting repair cannot be completed.
The technical scheme adopted by the invention for solving the technical problems is as follows: a cement pavement repairing method comprises the following steps:
s1: removing impurities on the pavement, and detecting the vacancy and the like and the void diseases at the bottom of the pavement slab by using a detector;
s2: determining the drilling position of the road surface board according to the detection result in the S1, and marking the drilling position;
s3: drilling holes on the pavement slab according to the positions marked in the S2, and stopping drilling the roadbed below the pavement slab;
s4: adopting a hole expanding device to expand the hole of the roadbed below the drilling position of the pavement slab;
s5: inserting a vibration rod into the hole formed in the step S3, and vibrating the subgrade after hole expansion;
s6: sucking out the loose impurities on the surface of the subgrade after reaming by using dust suction equipment;
s7: placing a repair bag into the hole formed in the step S4;
s8: installing reinforcing steel bars inside the repairing bag, and communicating a port of the repairing bag with an outlet end of grouting equipment;
s9: injecting cement concrete into the repairing bag through grouting equipment;
s10: grouting continuously until the repairing bag jacks up the sunken cement panel to a height 3-5mm higher than the normal panel, and stopping grouting;
s11: after the grouting pressure is kept for 2-3min, the end openings of the repair bags are firmly bound through ropes, and then grouting equipment is removed;
s12: after the grouting concrete reaches 75% of the designed strength, chiseling the part of the repair bag, which exceeds the pavement slab, and chiseling the part downwards by 5-10 mm;
s13: roughening the side wall of the formed hole in the step S3, and pouring concrete between the formed hole and the grouting belt;
s14: and (5) watering and maintaining the repaired road section to open the traffic after the designed strength is reached, and completing the repair.
When the cement concrete pavement works, because the strength of the cement concrete pavement is high, when the foundation at the bottom of the pavement slab is damaged, the pavement slabs at the upper part are generally not fractured, but the height difference between adjacent connected pavement slabs occurs, so that the bumpy feeling is generated in the driving process, and the driving comfort is reduced; in the existing treatment means, a drilling grouting mode is usually adopted to fill the foundation defects at the bottom of the pavement slab, and the sunken pavement slab is lifted by using the pressure of grouting, so that the height difference between the adjacent pavement slabs is eliminated, and the driving comfort of the pavement is improved; when the traditional grouting mode is adopted to perform grouting lifting on the pavement slab at the edge of the pavement, as the side of the side facing the empty surface (namely the side of the pavement slab close to the edge of the pavement and without shoulder support) has no good tightness, grouting leakage can be caused, grouting pressure can not meet the requirement of lifting the pavement slab, and further the failure of cement pavement repair can be caused; therefore, in the scheme, the repairing bag is placed in the area needing grouting before grouting, then grouting is carried out on the inner portion of the repairing bag, filled slurry is wrapped by the arranged repairing bag, leakage of the slurry is prevented, grouting pressure is further guaranteed, the subsided panel can be lifted, and smooth pavement repairing is guaranteed; the specific process comprises the steps of cleaning the road before construction to ensure the tidiness of the construction environment, then determining the specific condition of the bottom of the pavement slab through a detector (an infrared detector, a sonar detector, a geological wave detector and the like), finding the position of a ground defect at the bottom of the pavement slab, providing a reference basis for the position of a drilled hole, further ensuring the repairing accuracy, preventing the disease from being repeated and improving the repairing construction quality; then, according to the detection result, the positions of the drill holes are comprehensively considered in combination with the inclination and sinking conditions of the pavement slab (generally, the holes can be drilled right above the roadbed defects or drilled on the sinking side of the pavement slab), then the positions of the roadbed defects are reamed through manual, mechanical or miniature blasting in a manner, so that an initial working space is provided for later grouting, meanwhile, the roadbed defects can be changed and filled on the premise that the pavement slab is not removed, the sinking problem of the pavement slab is solved from the root, the repeated occurrence of the problem is avoided, and the repairing quality is improved; then, the pavement slab is vibrated through a vibrating rod, so that the expanded foundation is vibrated to be compact, and the bearing capacity of the roadbed is improved; the loose part on the surface of the roadbed can be shaken off in the vibrating process, so that the fallen part is removed by the dust collection equipment, and the integrity of the roadbed is further ensured; inserting the repairing expense into the reamed cavity, and installing reinforcing steel bars for increasing strength, so that the connection strength of the post-grouting part and the original pavement slab part is ensured, and the stability of the pavement slab is improved; then, grouting is carried out on the inner part of the repair bag, so that the volume inside the repair bag is expanded, the pressure is increased, the sunken pavement slab is lifted, and the damage of the pavement slab is eliminated; in the lifting process, the lifting height of the pavement slab exceeds that of the adjacent pavement slab by 3-5mm, so that the leakage of the internal pressure of the repair bag and the shrinkage creep of cement concrete in the condensation process in the operation process are counteracted, the height of the repaired pavement slab is ensured to be closer to that of the adjacent pavement slab, and the repair quality is improved; keep pressure 2-3min and then provide certain congeals for the concrete of slip casting and connect the time, and then guarantee that the concrete has certain bearing capacity when removing pressure, reduce the settlement in later stage, the lateral wall through chisel hair pore-forming afterwards, and then increased the inside surface area of pore-forming, and then when connecting repair bag and former pavement board, increase joint strength between them, and then make wholeness between them better, and then improved the quality in the restoration, wait to reach strong and open the traffic after the designing requirement, and then prevent too early driving from causing the influence to the restoration part, and then guarantee prosthetic quality.
Preferably, the repair bag comprises a bag body, an extension part and a connecting part; the extension part is arranged at one end of the bag body; the extension part is fixedly connected with the bag body; the extension part is communicated with the interior of the bag body; the connecting part is arranged at one end of the extension part; the connecting part is fixedly connected with the extending part; the inner side of the connecting part is provided with threads; the bag body is folded into a cylindrical structure when not filled with concrete.
When the repairing bag works, the size of a drilled hole in the pavement slab is generally small, and a damaged area at the lower part of the pavement slab is generally large, so that the size of the repairing bag after grouting can meet the requirement of repairing roadbed damage, and the size of the repairing bag after grouting is also large; therefore, in the scheme, the bag body is in a folded state when the grouting liquid is not injected into the bag body, so that the size of the repair bag before use is smaller, and the repair bag is more convenient to carry; because the pavement slab has a certain thickness, the diameter of the hole is usually set to be slightly larger than that of the extension part by arranging the extension part when drilling, so that the repair bag is prevented from being clamped at the inner part of the hole of the pavement slab during grouting, the expansion and the opening of the repair bag are further prevented, the repair bag can be better unfolded during grouting, and the repair quality is improved; because the repair bag needs to be connected with external grouting equipment and keeps airtight in the grouting process, the connecting part is arranged at one end of the extending part, so that the repair bag is conveniently connected with the grouting equipment, the repair process is simpler and more convenient, and the repair work efficiency is improved.
Preferably, the two sides of the bag body are symmetrically provided with side wings; the side wings are communicated with the interior of the bag body.
When the repair bag is used, the pavement slab is inclined when sinking towards one side before repair, and if the pavement slab is lifted by grouting pressure of the repair bag, the area supported by the repair bag can not contain all suspended areas of the pavement slab, so that the lower part of the pavement slab is empty; secondly at the in-process that the side wing extends on repairing the bag, the flank can insert inside the road bed, and then has increased and repaired being connected between bag and the road bed, and then makes repairing the bag more stable, and then guarantees that prosthetic road surface is more stable after repairing.
Preferably, the bottom of the bag body is uniformly provided with bulges at intervals; the bulges are fixedly connected with the bag body.
When the road surface repairing bag is in operation, after repairing, a vehicle can generate horizontal load on a road surface when running on the road surface, so that the road surface and the repairing bag can generate sliding acting force, if only the friction force between the repairing bag and the road surface is relied on between the repairing bag and the road surface, and further under the action of a travelling crane, the repairing bag and the road surface can slide in a growing way, so that the road surface is driven to slide, and the damage of the road surface is caused, therefore, in the scheme, the bulge is arranged at the bottom of the bag body, and further, after grouting is completed, under the action of the pressure inside the pavement slab, the grouting liquid and the repairing bag, the bulge is inserted into the foundation, so that the connection between the foundation and the repairing bag is tighter, the resistance when the road surface and the repairing bag move is increased, the stability of the repairing bag is improved, and the stability of the repaired road surface is further ensured, thereby prolonging the service life of the pavement.
Preferably, the inner side of the connecting part is symmetrically provided with the lugs; the attachment lug is fixedly connected with the connecting part.
When the device works, in order to increase the connection between the repair bag and the original pavement slab, reinforcing steel bars for reinforcing are usually arranged at the extending parts of the original pavement slab and the binding belts, and because the specific gravity of the reinforcing steel bars is greater than that of cement concrete, if the reinforcing steel bars are directly inserted into the cement concrete, the reinforcing steel bars can sink to the bottom of the repair bag, so that the reinforcing can not be performed between the original pavement slab and the extending parts of the repair bag; simultaneously, the adopted reinforcing steel bars are threaded ribbed reinforcing steel bars, and the surfaces of the threaded ribbed reinforcing steel bars are rough, so that the reinforcing steel bars are well bonded with concrete, the structural stability of the repair bag is improved, and the structural stability of the repaired pavement is guaranteed.
Preferably, the bag body and the extension part are of the same structure; the bag body comprises a woven layer and a sealing layer; the woven layers are arranged on the two sides of the sealing layer; the woven layer is fixedly connected with the sealing layer.
When the repairing bag works, the repairing bag has sealing performance, the sealing layer is arranged in the bag body of the repairing bag, the sealing performance of the repairing bag is further ensured, meanwhile, the weaving layers (which can be formed by weaving metal wires or nylon ropes) are arranged on the two sides of the sealing layer, and the weaving layers are high in strength, so that when the pressure inside the repairing bag is high, the repairing bag can be ensured to bear high pressure without damage; meanwhile, the middle sealing layer can be protected by the braided layer, so that the sealing layer is prevented from being damaged by broken stones in concrete, and the sealing property of the repairing bag is further prevented from being lost, so that the completeness of the sealing property of the repairing bag is ensured, and the service life of the repairing bag is prolonged; meanwhile, the roughness of the braided layer is large, so that the frictional resistance between the repairing bag and the roadbed and between the repairing bag and the original pavement slab is increased, and the stability of the repairing bag after use is improved.
Preferably, the top end of the extension part is provided with a through hole along the circumferential direction, and the diameter of the through hole is smaller than 2 mm.
When the grouting device works, a small amount of air contained in the repairing bag needs to be removed in the grouting process, so that the through hole is formed in the top of the extending part, the air in the repairing bag can be removed through the through hole during grouting, and then the situation that the grouting bag also contains back bubbles is avoided, so that the situation that the strength of concrete in the repairing bag is reduced due to the bubbles is avoided, and the repairing quality is guaranteed; simultaneously through the through-hole that sets up, judge the slip casting condition of restoreing the inside bag through the condition of observing the slip casting liquid that the through-hole department flows after inside slip casting is accomplished, and then the operator of being convenient for observes the abundant situation of restoreing the inside bag, and then facilitates for repair work, has made things convenient for the operation.
Preferably, the concrete poured into the repair bag during grouting is double-quick cement concrete.
During operation, the double-block cement concrete refers to that the mixed cement is double-fast cement, wherein the double-fast (quick setting and quick hardening) cement is one of quick hardening sulphoaluminate cement, and is faster to solidify compared with the quick hardening cement, so the double-fast cement is called as double-fast cement.
The invention has the following beneficial effects:
1. according to the invention, the repairing bag is placed in the area needing grouting before grouting, then grouting is carried out on the inner part of the repairing bag, and the filled slurry is wrapped by the arranged repairing bag, so that the leakage of the slurry is prevented, the grouting pressure is further ensured, the settled panel can be lifted, and the smooth pavement repairing is ensured; the specific process comprises the steps of cleaning the road before construction to ensure the tidiness of the construction environment, then determining the specific condition of the bottom of the pavement slab through a detector (an infrared detector, a sonar detector, a geological wave detector and the like), finding the position of a ground defect at the bottom of the pavement slab, providing a reference basis for the position of a drilled hole, further ensuring the repairing accuracy, preventing the disease from being repeated and improving the repairing construction quality; then, according to the detection result, the positions of the drill holes are comprehensively considered in combination with the inclination and sinking conditions of the pavement slab (generally, the holes can be drilled right above the roadbed defects or drilled on the sinking side of the pavement slab), then the positions of the roadbed defects are reamed through manual, mechanical or miniature blasting in a manner, so that an initial working space is provided for later grouting, meanwhile, the roadbed defects can be changed and filled on the premise that the pavement slab is not removed, the sinking problem of the pavement slab is solved from the root, the repeated occurrence of the problem is avoided, and the repairing quality is improved; then, the pavement slab is vibrated through a vibrating rod, so that the expanded foundation is vibrated to be compact, and the bearing capacity of the roadbed is improved; the loose part on the surface of the roadbed can be shaken off in the vibrating process, so that the fallen part is removed by the dust collection equipment, and the integrity of the roadbed is further ensured; inserting the repairing expense into the reamed cavity, and installing reinforcing steel bars for increasing strength, so that the connection strength of the post-grouting part and the original pavement slab part is ensured, and the stability of the pavement slab is improved; then, grouting is carried out on the inner part of the repair bag, so that the volume inside the repair bag is expanded, the pressure is increased, the sunken pavement slab is lifted, and the damage of the pavement slab is eliminated; in the lifting process, the lifting height of the pavement slab exceeds that of the adjacent pavement slab by 3-5mm, so that the leakage of the internal pressure of the repair bag and the shrinkage creep of cement concrete in the condensation process in the operation process are counteracted, the height of the repaired pavement slab is ensured to be closer to that of the adjacent pavement slab, and the repair quality is improved; keep pressure 2-3min and then provide certain congeals for the concrete of slip casting and connect the time, and then guarantee that the concrete has certain bearing capacity when removing pressure, reduce the settlement in later stage, the lateral wall through chisel hair pore-forming afterwards, and then increased the inside surface area of pore-forming, and then when connecting repair bag and former pavement board, increase joint strength between them, and then make wholeness between them better, and then improved the quality in the restoration, wait to reach strong and open the traffic after the designing requirement, and then prevent too early driving from causing the influence to the restoration part, and then guarantee prosthetic quality.
2. According to the invention, the bag body is in a folded state when no grouting liquid is poured into the bag body, so that the size of the repair bag before use is smaller, and the repair bag is more convenient to carry; because the pavement slab has a certain thickness, the diameter of the hole is usually set to be slightly larger than that of the extension part by arranging the extension part when drilling, so that the repair bag is prevented from being clamped at the inner part of the hole of the pavement slab during grouting, the expansion and the opening of the repair bag are further prevented, the repair bag can be better unfolded during grouting, and the repair quality is improved; because the repair bag needs to be connected with external grouting equipment and keeps airtight in the grouting process, the connecting part is arranged at one end of the extending part, so that the repair bag is conveniently connected with the grouting equipment, the repair process is simpler and more convenient, and the repair work efficiency is improved.
3. In the invention, after the repair, when a vehicle runs on the road surface, a horizontal load is generated on the road surface and the roadbed, so that the road surface and the repair bags can generate a sliding acting force, and if the repair bags and the roadbed only depend on the friction force between the repair bags and the roadbed, the repair bags and the roadbed can slide under the action of a driving vehicle, so that the road surface is driven to slide, and the damage of the road surface is caused, therefore, in the scheme, the bulges are arranged at the bottom of the bag body, and after grouting is finished, the bulges are inserted into the foundation under the action of the pressure inside the pavement slab, the grouting liquid and the repair bags, so that the connection between the foundation and the repair bags is tighter, the resistance when the roadbed and the repair bags move is increased, the stability of the repair bags is improved, and the stability of the repaired road surface is ensured, thereby prolonging the service life of the pavement.
4. In order to increase the connection between the repair bag and the original pavement slab, a reinforcing steel bar for internal reinforcement is usually arranged at the extending part of the original pavement slab and the binding belt, and because the specific gravity of the reinforcing steel bar is greater than that of cement concrete, if the reinforcing steel bar is directly inserted into the cement concrete, the reinforcing steel bar can sink to the bottom of the repair bag, so that the reinforcement between the original pavement slab and the extending part of the repair bag cannot be performed; simultaneously, the adopted reinforcing steel bars are threaded ribbed reinforcing steel bars, and the surfaces of the threaded ribbed reinforcing steel bars are rough, so that the reinforcing steel bars are well bonded with concrete, the structural stability of the repair bag is improved, and the structural stability of the repaired pavement is guaranteed.
5. According to the invention, as the strength of the braided layer is higher, when the pressure in the repairing bag is higher, the repairing bag can bear higher pressure without damage; meanwhile, the middle sealing layer can be protected by the braided layer, so that the sealing layer is prevented from being damaged by broken stones in concrete, and the sealing property of the repairing bag is further prevented from being lost, so that the completeness of the sealing property of the repairing bag is ensured, and the service life of the repairing bag is prolonged; meanwhile, the roughness of the braided layer is large, so that the frictional resistance between the repairing bag and the roadbed and between the repairing bag and the original pavement slab is increased, and the stability of the repairing bag after use is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic structural diagram of a height difference disease of a cement pavement adjacent pavement slab in the invention;
FIG. 2 is a schematic structural view of a cement pavement disease site after reaming;
FIG. 3 is a schematic structural diagram of a cement pavement disease site after grouting according to the invention;
FIG. 4 is a schematic structural view of the cement pavement of the present invention after completion of repair;
FIG. 5 is a schematic view of the folded state of the rehabilitation bag of the present invention;
FIG. 6 is a schematic view of a first construction of the grouting repair bag of the present invention;
FIG. 7 is a schematic view of a second construction of the grouting repair bag of the present invention;
FIG. 8 is a schematic view of the internal structure of the prosthetic bag of the present invention;
FIG. 9 is a schematic view of the structure of the bag of the present invention;
in the figure: the bag comprises a bag body 1, an extension part 2, a connecting part 3, a side wing 4, a bulge 5, an attaching lug 6, a sealing layer 7, a braided layer 8, a through hole 9, a pavement slab 10 and a roadbed 11.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 9, a method for repairing a cement pavement includes the following steps:
s1: removing impurities on the pavement, and detecting the vacancy and the like and the void diseases at the bottom of the pavement slab by using a detector;
s2: determining the drilling position of the road surface board according to the detection result in the S1, and marking the drilling position;
s3: drilling holes on the pavement slab according to the positions marked in the S2, and stopping drilling the roadbed below the pavement slab;
s4: adopting a hole expanding device to expand the hole of the roadbed below the drilling position of the pavement slab;
s5: inserting a vibration rod into the hole formed in the step S3, and vibrating the subgrade after hole expansion;
s6: sucking out the loose impurities on the surface of the subgrade after reaming by using dust suction equipment;
s7: placing a repair bag into the hole formed in the step S4;
s8: installing reinforcing steel bars inside the repairing bag, and communicating a port of the repairing bag with an outlet end of grouting equipment;
s9: injecting cement concrete into the repairing bag through grouting equipment;
s10: grouting continuously until the repairing bag jacks up the sunken cement panel to a height 3-5mm higher than the normal panel, and stopping grouting;
s11: after the grouting pressure is kept for 2-3min, the end openings of the repair bags are firmly bound through ropes, and then grouting equipment is removed;
s12: after the grouting concrete reaches 75% of the designed strength, chiseling the part of the repair bag, which exceeds the pavement slab, and chiseling the part downwards by 5-10 mm;
s13: roughening the side wall of the formed hole in the step S3, and pouring concrete between the formed hole and the grouting belt;
s14: and (5) watering and maintaining the repaired road section to open the traffic after the designed strength is reached, and completing the repair.
When the cement concrete pavement works, because the strength of the cement concrete pavement is high, when the foundation at the bottom of the pavement slab is damaged, the pavement slabs at the upper part are generally not fractured, but the height difference between adjacent connected pavement slabs occurs, so that the bumpy feeling is generated in the driving process, and the driving comfort is reduced; in the existing treatment means, a drilling grouting mode is usually adopted to fill the foundation defects at the bottom of the pavement slab, and the sunken pavement slab is lifted by using the pressure of grouting, so that the height difference between the adjacent pavement slabs is eliminated, and the driving comfort of the pavement is improved; when the traditional grouting mode is adopted to perform grouting lifting on the pavement slab at the edge of the pavement, as the side of the side facing the empty surface (namely the side of the pavement slab close to the edge of the pavement and without shoulder support) has no good tightness, grouting leakage can be caused, grouting pressure can not meet the requirement of lifting the pavement slab, and further the failure of cement pavement repair can be caused; therefore, in the scheme, the repairing bag is placed in the area needing grouting before grouting, then grouting is carried out on the inner portion of the repairing bag, filled slurry is wrapped by the arranged repairing bag, leakage of the slurry is prevented, grouting pressure is further guaranteed, the subsided panel can be lifted, and smooth pavement repairing is guaranteed; the specific process comprises the steps of cleaning the road before construction to ensure the tidiness of the construction environment, then determining the specific condition of the bottom of the pavement slab through a detector (an infrared detector, a sonar detector, a geological wave detector and the like), finding the position of a ground defect at the bottom of the pavement slab, providing a reference basis for the position of a drilled hole, further ensuring the repairing accuracy, preventing the disease from being repeated and improving the repairing construction quality; then, according to the detection result, the positions of the drill holes are comprehensively considered in combination with the inclination and sinking conditions of the pavement slab (generally, the holes can be drilled right above the roadbed defects or drilled on the sinking side of the pavement slab), then the positions of the roadbed defects are reamed through manual, mechanical or miniature blasting in a manner, so that an initial working space is provided for later grouting, meanwhile, the roadbed defects can be changed and filled on the premise that the pavement slab is not removed, the sinking problem of the pavement slab is solved from the root, the repeated occurrence of the problem is avoided, and the repairing quality is improved; then, the pavement slab is vibrated through a vibrating rod, so that the expanded foundation is vibrated to be compact, and the bearing capacity of the roadbed is improved; the loose part on the surface of the roadbed can be shaken off in the vibrating process, so that the fallen part is removed by the dust collection equipment, and the integrity of the roadbed is further ensured; inserting the repairing expense into the reamed cavity, and installing reinforcing steel bars for increasing strength, so that the connection strength of the post-grouting part and the original pavement slab part is ensured, and the stability of the pavement slab is improved; then, grouting is carried out on the inner part of the repair bag, so that the volume inside the repair bag is expanded, the pressure is increased, the sunken pavement slab is lifted, and the damage of the pavement slab is eliminated; in the lifting process, the lifting height of the pavement slab exceeds that of the adjacent pavement slab by 3-5mm, so that the leakage of the internal pressure of the repair bag and the shrinkage creep of cement concrete in the condensation process in the operation process are counteracted, the height of the repaired pavement slab is ensured to be closer to that of the adjacent pavement slab, and the repair quality is improved; keep pressure 2-3min and then provide certain congeals for the concrete of slip casting and connect the time, and then guarantee that the concrete has certain bearing capacity when removing pressure, reduce the settlement in later stage, the lateral wall through chisel hair pore-forming afterwards, and then increased the inside surface area of pore-forming, and then when connecting repair bag and former pavement board, increase joint strength between them, and then make wholeness between them better, and then improved the quality in the restoration, wait to reach strong and open the traffic after the designing requirement, and then prevent too early driving from causing the influence to the restoration part, and then guarantee prosthetic quality.
As shown in fig. 5 to 8, the repair bag includes a bag body 1, an extension portion 2, and a connection portion 3; the extension part 2 is arranged at one end of the bag body 1; the extension part 2 is fixedly connected with the bag body 1; the extension part 2 is communicated with the inside of the bag body 1; the connecting part 3 is arranged at one end of the extension part 2; the connecting part 3 is fixedly connected with the extension part 2; the inner side of the connecting part 3 is provided with threads; the bag body 1 is folded into a cylindrical structure when not filled with concrete.
When the repairing bag works, the size of a drilled hole in the pavement slab is generally small, and a damaged area at the lower part of the pavement slab is generally large, so that the size of the repairing bag after grouting can meet the requirement of repairing roadbed damage, and the size of the repairing bag after grouting is also large; therefore, in the scheme, the bag body 1 is in a folded state when the grouting liquid is not injected, so that the size of the repair bag before use is smaller, and the repair bag is more convenient to carry; because the pavement slab has a certain thickness, the diameter of the hole is set to be slightly larger than that of the extension part 2 by arranging the extension part 2 and drilling, so that the repair bag is prevented from being clamped inside the hole of the pavement slab during grouting, the expansion and the opening of the repair bag are further prevented, the repair bag can be better unfolded during grouting, and the repair quality is improved; because the repair bag needs to be connected with external grouting equipment and keeps airtight in the grouting process, the connecting part 3 is arranged at one end of the extension part 2, so that the repair bag is convenient to connect with the grouting equipment, the repair process is simpler and more convenient, and the repair work efficiency is improved.
As shown in fig. 5 to 8, two sides of the bag body 1 are symmetrically provided with side flaps 4; the side flaps 4 communicate with the interior of the bag body 1.
When the repair bag is in work, the pavement slab is inclined when sinking towards one side before repair, if the pavement slab is lifted by grouting pressure of the repair bag, the area supported by the repair bag can not contain all suspended areas of the pavement slab, and the lower part of the pavement slab is empty, so that the flanks 4 are symmetrically arranged on the two sides of the bag body 1, and after the repair bag is unfolded, the flanks 4 extend towards the two sides, so that the contact area between the repair bag and the pavement slab is increased, the support of the pavement slab by the repair bag is more stable, and the repaired pavement is more stable; secondly, the in-process that flank 4 extends on repairing the bag, inside flank 4 can insert the road bed, and then increased and repaired being connected between bag and the road bed, and then make repairing the bag more stable, and then guarantee that the prosthetic road surface is more stable after repairing.
As shown in fig. 5 to 8, the bottom of the bag body 1 is provided with protrusions 5 at regular intervals; the bulge 5 is fixedly connected with the bag body 1.
When the road repairing bag is in operation, when a vehicle runs on the road surface after being repaired, the vehicle can generate horizontal load on the road surface and the roadbed, so that the road surface and the repairing bag can generate sliding acting force, if the repairing bag and the roadbed only depend on the friction force between the repairing bag and the roadbed, and further under the action of driving, the repairing bag and the roadbed can slide in a growing way, so that the road surface is driven to slide, and the damage of the road surface is caused, therefore, in the scheme, the bulge 5 is arranged at the bottom of the bag body 1, and further, after grouting is completed, under the action of the pressure in the pavement slab, the grouting liquid and the repairing bag, the bulge 5 is inserted into the foundation, so that the connection between the foundation and the repairing bag is tighter, the resistance when the roadbed moves with the repairing bag is increased, the stability of the repairing bag is improved, and the stability of the repaired road surface is further ensured, thereby prolonging the service life of the pavement.
As shown in fig. 5 to 8, the inner side of the connecting part 3 is symmetrically provided with the attachment ears 6; the attachment ears 6 are fixedly connected with the connecting part 3.
When the device works, in order to increase the connection between the repair bag and the original pavement slab, a reinforcing steel bar for reinforcing is usually arranged at the position of the extension part 2 of the source pavement slab and the binding belt, and because the specific gravity of the reinforcing steel bar is greater than that of cement concrete, if the reinforcing steel bar is directly inserted into the cement concrete, the reinforcing steel bar can sink to the bottom of the repair bag, so that the reinforcement between the original pavement slab and the extension part 2 of the repair bag cannot be performed, therefore, symmetrical attachment lugs 6 are arranged on the extension part 2 of the repair bag, and when the reinforcing steel bar is installed, hooks are arranged on two sides of the reinforcing steel bar and hung on the attachment lugs 6, so that the accuracy of the installation position of the reinforcing steel bar is ensured, the reinforcing steel bar can reinforce the connection position of the original pavement slab and the extension part 2 of the repair bag, the integrity between the original pavement slab and the extension part 2 is enhanced, and the repaired pavement is more stable; simultaneously, the adopted reinforcing steel bars are threaded ribbed reinforcing steel bars, and the surfaces of the threaded ribbed reinforcing steel bars are rough, so that the reinforcing steel bars are well bonded with concrete, the structural stability of the repair bag is improved, and the structural stability of the repaired pavement is guaranteed.
As shown in fig. 9, the bag body 1 and the extension 2 have the same structure; the bag body 1 comprises a woven layer 8 and a sealing layer 7; the braided layers 8 are arranged on two sides of the sealing layer 7; the braided layer 8 is fixedly connected with the sealing layer 7.
When the repairing bag works, the repairing bag has sealing performance, the sealing layer 7 is arranged in the bag body 1 of the repairing bag, the sealing performance of the repairing bag is further ensured, meanwhile, the weaving layers 8 (which can be formed by weaving metal wires or nylon ropes) are arranged on two sides of the sealing layer 7, and the weaving layers 8 are high in strength, so that when the pressure inside the repairing bag is high, the repairing bag can be guaranteed to bear high pressure without damage; meanwhile, the sealing layer 7 in the middle can be protected by the braid layer 8, so that the sealing layer 7 is prevented from being damaged by broken stones in concrete, and the sealing property of the repairing bag is further prevented from being lost, therefore, the integrity of the sealing property of the repairing bag is ensured, and the service life of the repairing bag is prolonged; meanwhile, the roughness of the braided layer 8 is large, so that the frictional resistance between the repairing bag and the roadbed and between the repairing bag and the original pavement slab is increased, and the stability of the repairing bag after use is improved.
As shown in fig. 5 to 8, the top end of the extension 2 is provided with a through hole 9 in the circumferential direction, and the diameter of the through hole 9 is less than 2 mm.
When the grouting repair bag works, a small amount of air contained in the repair bag needs to be removed in the grouting process, so that the through hole 9 is formed in the top of the extension part 2, the air in the repair bag can be removed through the through hole 9 during grouting, and then the situation that the grouting bag also contains back bubbles is avoided, so that the situation that the strength of concrete in the repair bag is reduced due to the bubbles is avoided, and the repair quality is ensured; simultaneously through the through-hole 9 that sets up, judge the inside slip casting condition of restoration bag through the condition of observing the slip casting liquid that flows in through-hole 9 department after inside slip casting is accomplished, and then be convenient for the operator to observe the abundant situation of restoration bag inside, and then for repair work provides convenience, made things convenient for the operation.
And during grouting, the concrete filled in the repair bag is double-quick cement concrete.
During operation, the double-block cement concrete is characterized in that the cement used in mixing is double-quick-setting cement, wherein the double-quick-setting cement is one of quick-setting sulphoaluminate cement, and is quicker in setting compared with the quick-setting cement, so the double-quick-setting cement is called as double-quick-setting cement.
During work, a repairing bag is placed in an area needing grouting before grouting, then grouting is carried out on the interior of the repairing bag, filled slurry is wrapped by the arranged repairing bag, leakage of the slurry is prevented, grouting pressure is further guaranteed, a settled panel can be lifted, and smooth pavement repairing is guaranteed; the specific process comprises the steps of cleaning the road before construction to ensure the tidiness of the construction environment, then determining the specific condition of the bottom of the pavement slab through a detector (an infrared detector, a sonar detector, a geological wave detector and the like), finding the position of a ground defect at the bottom of the pavement slab, providing a reference basis for the position of a drilled hole, further ensuring the repairing accuracy, preventing the disease from being repeated and improving the repairing construction quality; then, according to the detection result, the positions of the drill holes are comprehensively considered in combination with the inclination and sinking conditions of the pavement slab (generally, the holes can be drilled right above the roadbed defects or drilled on the sinking side of the pavement slab), then the positions of the roadbed defects are reamed through manual, mechanical or miniature blasting in a manner, so that an initial working space is provided for later grouting, meanwhile, the roadbed defects can be changed and filled on the premise that the pavement slab is not removed, the sinking problem of the pavement slab is solved from the root, the repeated occurrence of the problem is avoided, and the repairing quality is improved; then, the pavement slab is vibrated through a vibrating rod, so that the expanded foundation is vibrated to be compact, and the bearing capacity of the roadbed is improved; the loose part on the surface of the roadbed can be shaken off in the vibrating process, so that the fallen part is removed by the dust collection equipment, and the integrity of the roadbed is further ensured; inserting the repairing expense into the reamed cavity, and installing reinforcing steel bars for increasing strength, so that the connection strength of the post-grouting part and the original pavement slab part is ensured, and the stability of the pavement slab is improved; then, grouting is carried out on the inner part of the repair bag, so that the volume inside the repair bag is expanded, the pressure is increased, the sunken pavement slab is lifted, and the damage of the pavement slab is eliminated; in the lifting process, the lifting height of the pavement slab exceeds that of the adjacent pavement slab by 3-5mm, so that the leakage of the internal pressure of the repair bag and the shrinkage creep of cement concrete in the condensation process in the operation process are counteracted, the height of the repaired pavement slab is ensured to be closer to that of the adjacent pavement slab, and the repair quality is improved; keep pressure 2-3min and then provide certain congeals for the concrete of slip casting and connect the time, and then guarantee that the concrete has certain bearing capacity when removing pressure, reduce the settlement in later stage, the lateral wall through chisel hair pore-forming afterwards, and then increased the inside surface area of pore-forming, and then when connecting repair bag and former pavement board, increase joint strength between them, and then make wholeness between them better, and then improved the quality in the restoration, wait to reach strong and open the traffic after the designing requirement, and then prevent too early driving from causing the influence to the restoration part, and then guarantee prosthetic quality.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A cement pavement repairing method is characterized in that: the method comprises the following steps:
s1: removing sundries on the pavement to be repaired, and detecting holes and void diseases at the bottom of the pavement slab by using a detector;
s2: determining the drilling position of the road surface board according to the detection result in the S1, and marking the drilling position;
s3: drilling holes on the pavement slab according to the positions marked in the S2, and stopping drilling the roadbed below the pavement slab;
s4: adopting a hole expanding device to expand the hole of the roadbed below the drilling position of the pavement slab;
s5: inserting a vibration rod into the hole formed in the step S3, and vibrating the subgrade after hole expansion;
s6: sucking out the loose impurities on the surface of the subgrade after reaming by using dust suction equipment;
s7: placing a repair bag into the hole formed in the step S4;
s8: installing reinforcing steel bars inside the repairing bag, and communicating a port of the repairing bag with an outlet end of grouting equipment;
s9: injecting cement concrete into the interior of the repair bag through grouting equipment;
s10: grouting continuously until the sunken cement panel is jacked up by the repairing bag to exceed the height of the normal panel by 3-5mm, and stopping grouting;
s11: after the grouting pressure is kept for 2-3min, the end openings of the repair bags are firmly bound through ropes, and then grouting equipment is removed;
s12: after the grouting concrete reaches 75% of the designed strength, chiseling the part of the repair bag, which exceeds the pavement slab, and chiseling the part downwards by 5-10 mm;
s13: roughening the side wall of the formed hole in the step S3, and pouring concrete between the formed hole and the grouting belt;
s14: and (5) watering and maintaining the repaired road section to open the traffic after the designed strength is reached, and completing the repair.
2. A cement pavement restoration method according to claim 1, characterized in that: the repair bag comprises a bag body (1), an extension part (2) and a connecting part (3); one end of the bag body (1) is provided with the extension part (2); the extension part (2) is fixedly connected with the bag body (1); the extension part (2) is communicated with the interior of the bag body (1); one end of the extension part (2) is provided with the connecting part (3); the connecting part (3) is fixedly connected with the extension part (2); the inner side of the connecting part (3) is provided with threads; the bag body (1) is folded into a cylindrical structure when not filled with concrete.
3. A cement pavement restoration method according to claim 2, characterized in that: the two sides of the bag body (1) are symmetrically provided with side wings (4); the side wings (4) are communicated with the interior of the bag body (1).
4. A cement pavement restoration method according to claim 3, characterized in that: the bottom of the bag body (1) is uniformly provided with bulges (5) at intervals; the bulges (5) are fixedly connected with the bag body (1).
5. The method for repairing a cement road surface according to claim 4, characterized in that: the inner side of the connecting part (3) is symmetrically provided with lugs (6); the attachment ears (6) are fixedly connected with the connecting part (3).
6. The method for repairing a cement road surface according to claim 5, characterized in that: the bag body (1) and the extension part (2) have the same structure; the bag body (1) comprises a weaving layer (8) and a sealing layer (7); the two sides of the sealing layer (7) are provided with the braided layers (8); the woven layer (8) is fixedly connected with the sealing layer (7).
7. The method for repairing a cement road surface according to claim 6, characterized in that: the top end of the extension part (2) is provided with a through hole (9) along the circumferential direction; the diameter of the through hole (9) is less than 2 mm.
8. A cement pavement restoration method according to claim 7, characterized in that: and during grouting, the concrete filled in the repair bag is double-quick cement concrete.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115012289A (en) * | 2022-05-09 | 2022-09-06 | 新疆北新路桥集团股份有限公司 | Minimally invasive treatment method for road deep disease |
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| US20160169435A1 (en) * | 2015-02-09 | 2016-06-16 | SAFEKEY Engineering Technology(Zhengzhou), Ltd. | Polymer composite grouting method for blocking leaking and sand inrush of underground pipelines |
| CN211621548U (en) * | 2019-11-13 | 2020-10-02 | 浙江省普陀地基基础工程有限公司 | Karst foundation local adds thick liquid reinforcing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104652415A (en) * | 2015-02-09 | 2015-05-27 | 郑州安源工程技术有限公司 | Underground pipeline sedimentation repair high polymer membrane bag grouting method |
| US20160169435A1 (en) * | 2015-02-09 | 2016-06-16 | SAFEKEY Engineering Technology(Zhengzhou), Ltd. | Polymer composite grouting method for blocking leaking and sand inrush of underground pipelines |
| CN205062808U (en) * | 2015-10-21 | 2016-03-02 | 中铁第四勘察设计院集团有限公司 | Enlarged footing sack slip casting stake |
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| CN115012289A (en) * | 2022-05-09 | 2022-09-06 | 新疆北新路桥集团股份有限公司 | Minimally invasive treatment method for road deep disease |
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