CN114508015A - Method for reinforcing and repairing bridge-head bump road surface - Google Patents
Method for reinforcing and repairing bridge-head bump road surface Download PDFInfo
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- CN114508015A CN114508015A CN202210219124.3A CN202210219124A CN114508015A CN 114508015 A CN114508015 A CN 114508015A CN 202210219124 A CN202210219124 A CN 202210219124A CN 114508015 A CN114508015 A CN 114508015A
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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
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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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
A method for reinforcing and repairing the pavement of bridge-head jump includes drilling horizontal holes on road bed, inserting expansion repairing pipes, drilling vertical holes vertically, inserting vertical anchoring pipes, introducing thermite into vertical anchoring pipes, igniting thermite, generating high temp and reaction product, welding vertical anchoring pipes to expansion repairing pipes, combining with the material for forming road bed to form multiple glass state anchoring basic points, and grouting in horizontal holes and vertical holes. The invention utilizes thermit reaction high temperature to melt the material forming the roadbed into glassy substances to form a reinforced base point, and then is assisted with grouting repair, thereby forming a point, line and surface composite reinforced structure of an anchoring frame and the reinforced base point, greatly improving the strength of the roadbed and preventing the re-occurrence of settlement.
Description
Technical Field
The invention relates to the field of road repair, in particular to a method for reinforcing and repairing a bridge head bump road surface.
Background
The bump at the bridge head is caused by the phenomenon that the vehicle jumps when passing because steps appear on a longitudinal slope of a road surface due to differential settlement or damage of expansion joints at the bridge head and the expansion joints of the road. The main reasons causing the bump at the bridge head include uneven settlement, abrupt rigidity change, vehicle speed, vibration resistance of the vehicle and the like. In terms of urban road conditions, uneven settlement occurs at the joint between a flexible road and a rigid structure, and the occurrence of slab staggering is mainly caused. The bridge, the roadbed and the pavement are different in material composition, rigidity, strength, expansion and contraction and the like, and concentrated stress is easily formed at the bridge head joint when the stress is applied. Under the action of vehicle load, structural dead weight and natural factors, the bridge and the road are settled simultaneously, but the settlement of the bridge and the road is greatly different, and the settlement of the road is far greater than that of the bridge, so that a platform is staggered, and the bridge head is jumped when the vehicle is driven.
At present, the repairing method for bump at the bridge head generally comprises the following three methods:
1) the treatment method can effectively solve the problem of vehicle jumping, but the traffic is interrupted, the construction period is long, and the social and economic development is seriously restricted;
2) the method fundamentally solves the problem of the bump at the bridge head in the use stage of the road bridge by constructing a special device in the design and construction stage of the transition section of the road bridge, can be better used for treating the transition section of a newly-built bridge, but is not suitable for a large number of bridges in service in China and is not convenient for construction and transformation of the existing bridges;
3) the grouting treatment is carried out in the drilling of the subsidence area, but the grouting recovery area and the recovery amount cannot be accurately controlled, even transitional correction can be generated, partial pavement is upheld, and the uncontrollable grouting method aggravates bridge head jumping.
The invention patent with the publication number of CN113737624A discloses a bridge head bumping bag type grouting repair construction method, which solves the problem of controlling grouting amount, but the repair method has low strength and cannot prevent subsequent settlement.
Disclosure of Invention
In order to solve the problem that the bridge head vehicle-jumping road surface after grouting repair still has sedimentation risk, the invention provides a method for reinforcing and repairing the bridge head vehicle-jumping road surface, which comprises the steps of drilling a horizontal hole in a road bed and inserting an expansion repair pipe, drilling a vertical hole on the road surface and inserting a vertical anchoring pipe, arranging the vertical anchoring pipes along the length direction of the expansion repair pipe and connecting the vertical anchoring pipes with the expansion repair pipe, finally introducing thermite and igniting, wherein metal products and high temperature generated in the reaction process not only enable the vertical anchoring pipes and the expansion repair pipe to be connected into a whole to form a reinforcing framework, but also enable the material forming the road bed to be melted into a glassy state substance to form a reinforcing base point, and then assisting grouting repair to form a point, line and surface composite reinforcing structure of an anchoring framework and the reinforcing base point, thereby greatly improving the strength of the road bed, preventing the re-occurrence of sedimentation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for reinforcing and repairing a bridge head bump road surface comprises the following steps:
1) drilling a plurality of horizontal holes in a roadbed of the road surface of the bump car settlement area at the bridge head from two sides of the road surface in a direction vertical to the extending direction of the roadbed, and inserting an expansion repairing pipe into each horizontal hole;
2) vertically drilling a plurality of vertical holes downwards on the road surface of the bridge head bump settlement area along the length direction of each expansion repairing pipe, inserting a vertical anchoring pipe into each vertical hole, and connecting the bottom of each vertical anchoring pipe with the expansion repairing pipe;
3) leading thermite into the vertical anchoring pipe, igniting the thermite, generating high temperature and reaction products, and combining the high temperature and reaction products with the formation material of the roadbed while welding the vertical anchoring pipe and the expansion repairing pipe, thereby forming a plurality of glass state anchoring base points in the roadbed;
4) and grouting into the horizontal hole and the vertical hole respectively to finish the reinforcing and repairing of the pavement.
As an optimized scheme of the pavement reinforcing and repairing method, each expansion repairing pipe is filled with an expansion repairing material formed by mixing vermiculite particles and sand particles, and a contact part of the expansion repairing pipe and the vertical anchoring pipe is provided with a through hole, so that a thermite in the vertical anchoring pipe is mixed into the expansion repairing material through a leakage hole at the bottom of the vertical anchoring pipe.
As another optimized scheme of the pavement reinforcing and repairing method, each expansion repairing pipe comprises a metal pipe body, a split area is arranged in the middle of the metal pipe body, an expansion repairing material formed by mixing vermiculite particles and sandstone particles is filled in the split area, steel belts are arranged on the surface of the split area, gaps are formed among the steel belts, the bottom of each vertical anchoring pipe penetrates through the gaps and extends into the split area, and thermite in each vertical anchoring pipe is mixed into the expansion repairing material through a leakage hole in the bottom of the vertical anchoring pipe; the metal pipe body at the two sides of the splitting area is internally provided with a metal plugging plate which is fixed by a limiting pin penetrating through the metal pipe body from the outer side so as to limit the movement of the metal plugging plate towards the end part along the inner part of the metal pipe body.
As another optimization scheme of the pavement reinforcing and repairing method, the outer surface of the steel belt is provided with convex metal nails.
As another optimized scheme of the pavement reinforcing and repairing method, the vertical anchoring pipe comprises a straight pipe with an opening at the top, the bottom of the straight pipe is provided with a conical pointed bottom, and a plurality of leakage holes are distributed on the conical pointed bottom.
As another optimized scheme of the pavement reinforcing and repairing method, a guide pipe is arranged above the vertical anchoring pipe, and the top of the guide pipe extends out of the pavement of the subsidence area.
As another optimized solution of the above pavement reinforcing and repairing method, the sidewall of the bottom of the vertical anchoring pipe has a thin-wall region, and the thin-wall region is located at the upper part of the thermite filled region.
As another optimization of the pavement reinforcing and repairing method, the bottom of the vertical anchoring pipe is provided with an expanded diameter part, the top of the expanded diameter part is provided with a small diameter part with a diameter smaller than the expanded diameter part, and the thermite enters the expanded diameter part through the small diameter part.
The repairing mechanism of the expansion repairing material is that the expansion repairing of the roadbed and the road surface is realized by utilizing the thermal expansion of vermiculite, and the later stage grouting is matched with the vermiculite particles to carry out mixed repairing and strengthening on the roadbed because the expansion of the vermiculite particles is uneven.
Compared with the prior art, the invention has the following beneficial effects:
1) according to the invention, the horizontal hole is drilled in the roadbed, the expansion repairing pipe is inserted, meanwhile, the vertical hole is drilled on the road surface, the vertical anchoring pipe is inserted, the vertical anchoring pipes are arranged along the length direction of the expansion repairing pipe and are connected with the expansion repairing pipe, finally, the thermite is introduced and ignited, and metal products and high temperature generated in the reaction process not only enable the vertical anchoring pipe and the expansion repairing pipe to be connected into a whole to form a reinforced framework, but also enable the roadbed material to be melted into a glass state substance at the same time to form a reinforced base point, and then grouting repairing is assisted, so that a point, line and surface composite reinforced structure of 'anchoring framework + reinforced base point' is formed, the strength of the roadbed is greatly improved, and the reoccurrence of settlement is prevented;
2) the expansion repairing material is prepared by mixing vermiculite and sand stone, wherein the ingredient of the vermiculite contains silicon oxide, aluminum oxide, iron oxide and magnesium oxide, the expansion repairing pipe is heated and softened at high temperature generated by thermite, meanwhile, the volume of the expansion repairing material in the expansion repairing pipe expands rapidly, the larger the content is according to the content of the vermiculite, the larger the integral expansion size is, the higher the deformation amplitude of the expansion repairing pipe is, and after expansion, the expanded vermiculite is formed;
3) the expansion repairing pipe is provided with the split area, the surface of the split area is provided with the steel belt, and the arrangement of the steel belt is convenient for inserting the bottom of the vertical anchoring pipe into the expansion repairing pipe so that part of thermite is mixed into the expansion repairing material, and the thermite is easier to soften, deform or even melt at high temperature, so that the expansion repairing pipe is combined with a roadbed material to reinforce the roadbed.
Drawings
FIG. 1 is a schematic illustration of the invention after installation without repair;
FIG. 2 is a schematic view of a plurality of vertical anchoring pipes distributed along an expanded rehabilitating pipe;
FIG. 3 is a schematic view of an optimized construction of the expanded rehabilitating pipe;
FIG. 4 is a schematic view of one configuration of a vertical anchoring tube;
FIG. 5 is another schematic structural view of the vertical anchoring tube;
FIG. 6 is another structural schematic view of the vertical anchoring tube;
FIG. 7 is an enlarged schematic view at A of FIGS. 4-6;
FIG. 8 is a schematic view of the expanded repair of a metallic closure plate in a pipe of FIG. 3;
FIG. 9 is a schematic illustration of the expanded repair material in the expanded repair tube of FIG. 3;
FIG. 10 is a schematic representation of the intumescent repair mass of FIG. 9 after thermal expansion in a thermite reaction;
FIG. 11 is a schematic representation of the invention after grouting repair (when the guide tube at the top of the vertical anchor tube is not removed);
reference numerals: 1. bridge deck, 2, settlement area pavement, 3, roadbed, 4, ground soil, 5, expansion repair pipe, 501, metal pipe body, 502, cut-open area, 503, steel belt, 504, gap, 505, expansion repair material, 506, metal plugging plate, 507, limit pin, 6, vertical anchoring pipe, 601, straight pipe, 602, conical pointed bottom, 603, leakage hole, 604, thin-wall area, 605, diameter expansion part, 606, small pipe diameter part, 7, guide pipe, 701, funnel, 8, thermite,
Detailed Description
The present invention is further described in detail with reference to specific embodiments, and the parts of the present invention that are not described in the following embodiments are all techniques known to those skilled in the art, or techniques that can be found, for example, how to drill horizontal holes and vertical holes, and ensure that the vertical holes are communicated with the horizontal holes, how to perform grouting, and when grouting is stopped properly, equipment used for grouting, slurry proportion, proportion of thermite, and addition amount (specific addition amount can be obtained by performing a plurality of tests according to specific information such as specific roadbed condition, settlement condition, volume change rate of heated expansion of vermiculite, and the like under the guidance of the technical idea of the present invention).
Example 1
A method for reinforcing and repairing the road surface of a vehicle jumping at the end of a bridge, as shown in figure 1, wherein the road surface 2 of a subsidence area is generally positioned at the joint of a bridge deck 1, and a roadbed 3 is arranged on ground soil 4, comprises the following steps:
1) drilling a plurality of horizontal holes in the subgrade 3 of the pavement 2 in the bridge head bump settlement area from two sides of the pavement vertical to the extending direction of the subgrade 3, according to the settlement area of the pavement 2, wherein the horizontal holes are positioned in the subgrade 3 below the settlement area and extend into the subgrade 3 by 20-50cm, the distance between the horizontal holes is generally 20-30cm, the diameter of each horizontal hole is generally 6cm, and an expansion repair pipe 5 is inserted into each horizontal hole, the diameter of each horizontal hole is generally 1-2cm larger than the outer diameter of each expansion repair pipe 5, so that a gap is formed between each expansion repair pipe 5 and the wall of each hole, grouting can be injected into each expansion repair pipe 5 for repair, and each expansion repair pipe 5 is generally a DN40, DN32 or DN25 series steel pipe;
2) on the road surface 2 of the settlement area of the bump car at the bridge head, vertically and downwardly drilling a plurality of vertical holes along the length direction of each expansion repairing pipe 5, wherein the vertical holes are connected with the expansion repairing pipes 5, the distance between the vertical holes is generally 30-60cm, and a vertical anchoring pipe 6 is inserted into each vertical hole, as shown in figure 2, the vertical anchoring pipe 6 is a steel pipe, the outer diameter of the vertical anchoring pipe is smaller than the inner diameter of the vertical hole, a gap of 1-2cm is formed between the vertical anchoring pipe and the vertical hole, the top of the vertical anchoring pipe 6 is positioned in the road surface 2 and has a distance with the surface of the road, so that the later grouting repairing is facilitated, and the bottom of the vertical anchoring pipe 6 is connected with the expansion repairing pipe 5;
3) introducing thermite 8 into the vertical anchoring pipe 6, wherein the thermite 8 is selected from the existing thermite, generally, aluminum powder and ferric oxide powder with the mass ratio of 1:2.95 are mixed, the addition amount is determined by experiments according to the material, diameter, wall thickness and other factors of the vertical anchoring pipe 6 and the expansion repair pipe 5, igniting the thermite 8 by adopting concentrated sulfuric acid for ignition, namely, putting potassium chlorate and cane sugar on the surface of the thermite with the mass ratio of 1:1 and the total amount of about 10g, then dripping concentrated sulfuric acid for reaction for about 30-50s to generate high temperature and reaction products, and combining the high temperature and the reaction products with the forming material of the roadbed 3 while welding the vertical anchoring pipe 6 and the expansion repair pipe 5 so as to form a plurality of glass state anchoring base points in the roadbed 3, wherein the temperature generated by the thermite reaction reaches more than 2000 ℃, even 3000 ℃, at which the bottom of the vertical anchoring pipe 6 and the expansion rehabilitation pipe can be melted and joined together, and at which the material in the roadbed, such as sand and stone contained therein, mainly consisting of silica, earth and the like, can be melted and combined with the molten metal, and finally cooled to form a glassy high-hardness substance;
4) and (2) grouting into the horizontal hole and the vertical hole respectively, wherein the grout adopts conventional cement mortar and conventional grouting methods and parameters, for example, the most commonly used mortar formed by cement, sand and water with the mass ratio of 1:3:0.65 or other high-strength mortar, after two ends of the horizontal hole and the top end of the vertical hole are plugged, grouting is carried out from one end of the horizontal hole, after grouting is finished, surface leveling repair is carried out on the pavement after the grouting is solidified, and the pavement is reinforced and repaired.
The foregoing is a basic embodiment of the present invention, and further modifications, optimizations and limitations can be made on the foregoing, so as to obtain the following examples:
example 2
The embodiment is an improved scheme based on the embodiment 1, and the main technical scheme is the same as the embodiment 1, and the improvement point is as follows: each expansion repairing pipe 5 is filled with an expansion repairing material 505 formed by mixing vermiculite particles and sandstone particles, the area filled with the expansion repairing material 505 is positioned below the pavement 2 of the settlement area, after the filling is finished, two ends of the expansion repairing material 505 are completely blocked, for example, the expansion repairing material is filled with cement concrete or steel plate welding and the like, so that the expansion direction of the expansion repairing material 505 is limited to be expanded towards the vertical direction, the vermiculite particles generally adopt two particle sizes, namely 4-8mm and 3-6mm, the mass ratio of the two particle sizes is generally 4:1, the sandstone particles generally adopt 1-3mm, the volume change of the vermiculite in the same batch after being heated and expanded is tested in advance, and the expansion repairing pipes 5 are buried according to the settlement depth at different positions of the pavement of the settlement area and the depth of the expansion repairing pipes 5, Calculating the vermiculite volume required for jacking and recovering a pavement according to the factors such as the compactness of a roadbed 3, selecting the mass ratio of vermiculite particles to sandstone particles according to the vermiculite volume, wherein a through hole is formed in the contact part of an expansion repairing pipe 5 and a vertical anchoring pipe 6, the through hole only penetrates through one side wall of the expansion repairing pipe 5, namely the inner side and the outer side of the expansion repairing pipe 5 are communicated, at the moment, the bottom of the vertical anchoring pipe 6 extends into the expansion repairing pipe 5 through the through hole, so that an thermite in the vertical anchoring pipe 6 is mixed into an expansion repairing material 505 through a leakage hole 603 in the bottom of the vertical anchoring pipe 6, the vertical anchoring pipe 6 is provided with a straight pipe 601 and a conical pointed bottom 602 at the bottom of the straight pipe 601, the conical pointed bottom 602 is inserted into the through hole in the expansion repairing pipe 5, a plurality of leakage holes 603 are formed in the conical pointed bottom 602, the expansion repairing pipe 5 is a thin-wall steel pipe, therefore, after the vermiculite is melted under the action of the thermite, the vermiculite can be conveniently burst into the molten thin-wall steel pipe after being expanded.
Example 3
The embodiment is another modified scheme based on the embodiment 1, and the main technical scheme is the same as the embodiment 1, and the modified point is as follows: as shown in fig. 3, each of the expansion repairing pipes 5 includes a metal pipe body 501, which is generally a steel pipe, and a steel material with a relatively low melting point is selected as much as possible, a cut-away area 502 is disposed in the middle of the metal pipe body 501 along the length direction of the metal pipe body, the cut-away area 502 is actually formed by cutting off the upper part of the circular steel pipe when the circular steel pipe is horizontally placed, so as to expose the inner space of the steel pipe, the cut-away part occupies 1/3-2/3 of the whole circumference, the cut-away area 502 corresponds to a subsidence area of a road surface, but the length slightly exceeds the width of the subsidence area, the cut-away area 502 is filled with an expansion repairing material 505 formed by mixing vermiculite particles and sand and stone particles, the area filled with the expansion repairing material 505 is located below the road surface 2 of the subsidence area, and after the filling, both ends of the expansion repairing material are completely blocked, for example, by filling cement concrete or welding a steel plate, so as to define the expansion direction of the expansion repairing material 505 as to expand in a vertical direction, the vermiculite particles are generally selected from two particle sizes, namely 4-8mm and 3-6mm, the mass ratio of the two particle sizes is generally 4:1, the particle size of the sand stone particles is generally 1-3mm, the vermiculite is heated to expand to form expanded vermiculite, therefore, the volume change of the vermiculite in the same batch after being heated and expanded needs to be tested in advance, then the volume of the vermiculite needed for jacking and recovering the pavement is calculated according to factors such as the settlement depth of different positions of the pavement in a settlement area, the burying depth of an expansion repairing pipe 5, the compactness degree of a roadbed 3 and the like, the mass ratio of the vermiculite particles to the sand stone particles is selected according to the volume of the vermiculite, a steel belt 503 is arranged on the surface of a cut-open area 502, the steel belt 503 is a belt made of steel with the thickness of 2-3mm, the width is generally 1-2cm and covers the expansion repairing material 505, the expansion repairing material 505 is wrapped inside the cut-open area 502, as shown in fig. 9, when thermite reaction occurs, the generated heat softens the steel strips 503 and simultaneously enables vermiculite in the expansion repair material 505 to be heated and expanded, the steel strips 503 are jacked up, as shown in fig. 10, gaps 504 are formed among the steel strips 503, the width of each gap 504 is generally about 1cm, the gaps 504 exist, the bottom of the vertical anchoring pipe 6 penetrates through the gaps 504 and extends into the cut-open area 502, thermite in the vertical anchoring pipe 6 is mixed into the expansion repair material 505 through a leakage hole 603 in the bottom of the vertical anchoring pipe, the vertical anchoring pipe 6 is provided with a straight pipe 601 and a conical pointed bottom 602 at the bottom of the straight pipe 601, the conical pointed bottom 602 is inserted into a through hole in the expansion repair pipe 5, and a plurality of leakage holes 603 are arranged on the conical pointed bottom 602; metal plugging plates 506 are arranged in the metal pipe body 501 on two sides of the cut-open area 502, as shown in fig. 8 and 9, the metal plugging plates 506 are made of steel, are disc-shaped and are attached to the inner wall of the metal pipe body 501, so that the metal plugging plates 506 can slide along the inner wall of the metal pipe body 501, the metal plugging plates 506 are fixed by limiting pins 507 penetrating through the metal pipe body 501 from the outside, and the limiting pins 507 penetrate through holes in the diameter direction of the metal pipe body 501 to catch the metal plugging plates 506, so that the movement of the metal plugging plates 506 towards the end part along the inside of the metal pipe body 501 is limited.
Example 4
The embodiment is an improved scheme based on the embodiment 3, and the main technical scheme is the same as the embodiment 3, and the improvement point is as follows: the outer surface of the steel belt 503 is provided with protruding metal nails, which are not shown in the figure, when the expansion repairing pipe 5 is sent into the horizontal hole, the protruding metal nails touch the inner wall of the horizontal hole, and after the expansion repairing material 505 is heated to expand, the steel belt 503 is jacked up, and the metal nails on the surface of the steel belt are penetrated into the roadbed, so that the anchoring effect of the expansion repairing pipe 5 in the roadbed is enhanced; of course, metal nails may be designed on the surface of the metal pipe 501, and the length of these metal nails corresponds to the gap between the expansion repairing pipe 5 and the inner wall of the horizontal hole, so that the insertion of the expansion repairing pipe 5 into the horizontal hole is not affected.
Example 5
The embodiment is another modified scheme based on the embodiment 1, and the main technical scheme is the same as the embodiment 1, and the modified point is as follows: as shown in fig. 4 and 7, the vertical anchoring pipe 6 comprises a straight pipe 601 with an open top, a tapered pointed bottom 602 is provided at the bottom of the straight pipe 601, and a plurality of leakage holes 603 are distributed on the tapered pointed bottom 602. The plurality of the leakage holes 603 are kept parallel to the axial direction of the straight pipe 601, so that the thermite 8 in the vertical anchoring pipe 6 can flow out along the leakage holes 603.
Example 6
The embodiment is another modified scheme based on the embodiment 1, and the main technical scheme is the same as the embodiment 1, and the modified point is as follows: as shown in fig. 4 and 6, a guide tube 7 is arranged above the vertical anchoring tube 6, the guide tube 7 is in threaded connection with the vertical anchoring tube 6, the outer wall of the bottom of the guide tube 7 is provided with an external thread, the inner wall of the top of the vertical anchoring tube 6 is provided with an internal thread matched with the external thread, the top of the guide tube 7 extends out of the pavement 2 of the subsidence area, so that thermite 8 is conveniently led into the vertical anchoring tube 6 through the guide tube 7, and a funnel 701 can be arranged at the top of the guide tube 7, as shown in fig. 6, by leading thermite 8 and a ignition agent into the funnel 701, the ignition agent is ignited by concentrated sulfuric acid, namely after the thermite is led in, a mixture of potassium chlorate and cane sugar is led in, the mass ratio of the two is generally 1:1, the total amount is about 10g, and then the concentrated sulfuric acid is added into the funnel 701, and the reaction can be carried out for about 30-50 s.
Example 7
The embodiment is another modified scheme based on the embodiment 1, and the main technical scheme is the same as the embodiment 1, and the modified point is as follows: as shown in fig. 5, the sidewall of the bottom of the vertical anchoring pipe 6 has a thin-wall area 604, the thin-wall area 604 is substantially a groove arranged around the outer sidewall of the pipe body, the arrangement of the annular groove makes the pipe wall thinner, so that the pipe wall is more easily melted by thermite reaction, the wall thickness of the thin-wall area 604 is generally about 1mm, and the maximum thickness is not more than 2 mm; the thin-wall area 604 is positioned at the upper part of the area filled with the thermite 8, so that after the thin-wall area 604 is melted by the high temperature of the thermite reaction, the molten metal overflows into the vertical hole from the thin-wall area 604, and the direct contact area with the roadbed is increased.
Example 8
The embodiment is another modified scheme based on the embodiment 1, and the main technical scheme is the same as the embodiment 1, and the modified point is as follows: as shown in fig. 6, the bottom of the vertical anchoring pipe 6 has an enlarged diameter part 605, the top of the enlarged diameter part 605 has a small diameter part 606 with a diameter smaller than the enlarged diameter part 605, the enlarged diameter part 605 and the small diameter part 606 are actually two steel pipes with different diameters, and the diameter of the enlarged diameter part 605 is much larger than the small diameter part 606, generally twice as large as the latter, so that a clamping platform is formed at the junction of the two, when thermite 8 is in thermite reaction in the enlarged diameter part 605, the clamping platform has a heat collecting effect to prevent a large amount of heat from escaping from the small diameter part 606, the thermite 8 enters the enlarged diameter part 605 through the small diameter part 606, because the small diameter part 606 has a small diameter, it is inconvenient to introduce the thermite 8 into the small diameter part, therefore, a guide pipe 7 is arranged at the top of the small diameter part, the guide pipe 7 is connected with the vertical anchoring pipe 6 by a screw thread, and the outer wall of the bottom of the guide pipe 7 has an external thread, the inner wall of the top of the vertical anchoring pipe 6 is provided with an internal thread matched with the external thread, the top of the guide pipe 7 extends out of the pavement 2 of the subsidence area, so that thermite 8 can be conveniently led into the vertical anchoring pipe 6 through the guide pipe 7, a funnel 701 can be arranged at the top of the guide pipe 7, as shown in figure 6, thermite 8 and a igniting agent are led into the funnel 701, the igniting agent is ignited by adopting concentrated sulfuric acid, namely after the thermite is led in, a mixture of potassium chlorate and cane sugar is led in, the mass ratio of the potassium chlorate to the cane sugar is generally 1:1, the total amount is about 10g, and then the concentrated sulfuric acid is further added into the funnel 701, and the reaction can be carried out for about 30-50 s.
Claims (8)
1. A method for reinforcing and repairing a bridge head bump road surface is characterized by comprising the following steps:
1) drilling a plurality of horizontal holes in a roadbed (3) of a road surface (2) in a bump car settlement area at the bridge head from two sides of the road surface in a direction vertical to the extending direction of the roadbed (3), and inserting an expansion repairing pipe (5) into each horizontal hole;
2) vertically drilling a plurality of vertical holes downwards on the pavement (2) of the settlement area of the bump car at the bridgehead along the length direction of each expansion repairing pipe (5), inserting a vertical anchoring pipe (6) into each vertical hole, and connecting the bottom of each vertical anchoring pipe (6) with the expansion repairing pipe (5);
3) introducing thermite (8) into the vertical anchoring pipe (6), igniting the thermite (8), generating high temperature and reaction products, and combining the high temperature and reaction products with the forming material of the roadbed (3) while welding the vertical anchoring pipe (6) and the expansion repairing pipe (5), thereby forming a plurality of glass state anchoring base points in the roadbed (3);
4) and grouting into the horizontal hole and the vertical hole respectively to finish the reinforcing and repairing of the pavement.
2. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 1, which is characterized in that: each expansion repairing pipe (5) is filled with an expansion repairing material (505) formed by mixing vermiculite particles and sandstone particles, and a through hole is formed in the contact part of each expansion repairing pipe (5) and the vertical anchoring pipe (6), so that a thermite in the vertical anchoring pipe (6) is mixed into the expansion repairing material (505) through the leakage hole (603) in the bottom of the vertical anchoring pipe (6).
3. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 1, which is characterized in that: each expansion repairing pipe (5) comprises a metal pipe body (501), a split area (502) is arranged in the middle of the metal pipe body (501), expansion repairing materials (505) formed by mixing vermiculite particles and sandstone particles are filled in the split area (502), steel belts (503) are arranged on the surface of the split area (502), gaps (504) are formed among the steel belts (503), the bottom of each vertical anchoring pipe (6) penetrates through the gaps (504) and extends into the split area (502), and thermite in each vertical anchoring pipe (6) is mixed into the expansion repairing materials (505) through a leakage hole (603) in the bottom of the vertical anchoring pipe; metal plugging plates (506) are arranged in the metal pipe body (501) on two sides of the splitting area (502), and the metal plugging plates (506) are fixed by limiting pins (507) which penetrate through the metal pipe body (501) from the outer side so as to limit the movement of the metal plugging plates (506) towards the end part along the inner part of the metal pipe body (501).
4. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 3, characterized in that: the outer surface of the steel belt (503) is provided with a convex metal nail.
5. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 1, which is characterized in that: the vertical anchoring pipe (6) comprises a straight pipe (601) with an opening at the top, a conical sharp bottom (602) is arranged at the bottom of the straight pipe (601), and a plurality of leakage holes (603) are distributed on the conical sharp bottom (602).
6. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 1, which is characterized in that: and a guide pipe (7) is arranged above the vertical anchoring pipe (6), and the top of the guide pipe (7) extends out of the pavement (2) of the subsidence area.
7. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 1, which is characterized in that: the side wall of the bottom of the vertical anchoring pipe (6) is provided with a thin-wall area (604), and the thin-wall area (604) is positioned at the upper part of the area filled with the thermite (8).
8. The method for reinforcing and repairing the road surface of the bump at the bridge head according to claim 1, which is characterized in that: the bottom of the vertical anchoring pipe (6) is provided with an expanded diameter part (605), the top of the expanded diameter part (605) is provided with a small diameter part (606) with the diameter smaller than the expanded diameter part (605), and the thermite (8) enters the expanded diameter part (605) through the small diameter part (606).
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