CN110184956A - A kind of construction method for reinforcing culvert - Google Patents

Abstract

The invention provides a construction method for reinforcing a culvert, comprising the steps of: excavating the existing road in the culvert to the surface of the existing culvert foundation, pouring concrete to form the corrugated pipe culvert foundation; rectifying the existing failed settlement joints, and A drainage device is arranged at the settlement joint on the bottom surface of the existing culvert roof; a corrugated plate is laid on the inner wall of the existing culvert, and the end of the corrugated plate is fixedly installed in the foundation of the corrugated pipe culvert; The grouting backfill is performed between the inner walls of the existing culverts; wherein, the corrugated plates are assembled in pieces between the upper plate and the plate in the ring, and are assembled between the rings in the longitudinal direction by lap jointing, and are installed by fixing parts to form a fixed connection.

Description

A kind of construction method of strengthening culvert

technical field

The invention belongs to the technical field of bridge and culvert construction, and in particular relates to a construction method for reinforcing culverts, particularly a construction method for reinforcing culverts by using corrugated plates.

Background technique

With the rapid development of railway technology, the speed and load of railway trains continue to increase. Some railway culverts can not withstand the high-speed operation and load of trains, and have cracks, leaking bars and water seepage and other diseases.

These culverts with serious diseases need to be reinforced and renovated. At present, cover culvert schemes are usually used for remediation. The cover culvert schemes mainly include concrete cover culvert schemes and corrugated plate cover culvert schemes. Among them, although the concrete cover culvert scheme has certain economy, its construction process is complicated, and its construction period is long, which seriously affects the passage of local people and vehicles. The corrugated plate cover culvert scheme has simple construction procedures, short construction period and low construction risk. However, the construction cost of the corrugated plate cover culvert construction scheme is relatively high, and there is no complete set of construction technology and construction technology guidelines, and the construction technology of the corrugated plate cover culvert is not yet mature.

SUMMARY OF THE INVENTION

In view of the above technical problems, the present invention aims to provide a construction method for reinforcing culverts, which can effectively ensure the reinforcing effect of culverts by using corrugated plates to reinforce the culverts. The construction method can effectively waterproof and drain the culvert, enhance the waterproof and drainage function of the culvert, and can effectively reduce the disease problem of the culvert caused by the accumulated water in the culvert. In addition, the construction process of the construction method is simple, the construction period is short and the efficiency is high, and the passage of local people and vehicles is not affected, and the construction cost is low.

To this end, according to the present invention, a construction method for reinforcing a culvert is proposed, comprising the following steps:

The existing pavement in the culvert is excavated to the surface of the existing culvert foundation, and concrete is poured to form the corrugated pipe culvert foundation; A corrugated plate is laid on the inner wall of the existing culvert, and the end of the corrugated plate is fixedly installed in the foundation of the corrugated pipe culvert; grouting and backfilling is performed between the corrugated plate and the inner wall of the existing culvert; wherein, the The corrugated plate is assembled in pieces between the upper plate and the plate in the ring, and is assembled by overlapping between the rings in the longitudinal direction, and is installed with a fixing piece to form a fixed connection.

In a preferred embodiment, the corrugated plates are assembled in turn in the longitudinal direction after the annular assembly is completed.

In a preferred embodiment, the excavation width of the existing road in the culvert is not less than 40cm, and the height of the corrugated pipe culvert foundation is not less than 30cm.

In a preferred embodiment, after the prefabricated reinforcement is implanted on the surface of the existing culvert foundation, concrete is poured to form the corrugated pipe culvert foundation.

In a preferred embodiment, the prefabricated bars are steel bars and are arranged in a staggered manner, the implantation depth of the prefabricated bars is not less than 30 cm, and the thrown out length is not less than 15 cm.

In a preferred embodiment, after the reinforcement cage is bound on the surface of the existing culvert foundation, concrete is poured to form the corrugated pipe culvert foundation.

In a preferred embodiment, the drainage device includes a full longitudinal drainage pipe arranged at the top of the side wall of the culvert and a transverse drainage half pipe arranged along the settlement joint, and both ends of the transverse drainage half pipe are connected to the longitudinal drainage pipe. The whole pipe is connected, and the culvert water is discharged through the longitudinal drainage whole pipe.

In a preferred embodiment, the drainage device comprises a water-proof and drainage plate arranged at the settlement joint to form a circumferential extension, and two circumferential ends of the waterproof and drainage plate are communicated with the arch foot drainage pipe of the culvert so as to Drain the culvert water.

In a preferred embodiment, after the corrugated plate is laid and installed, an annular space is formed between the corrugated plate and the inner wall of the culvert, and before the annular space is grouted and backfilled, the annular space is blocked. The longitudinal ends of the space, and a grouting pipe is reserved at one end, and an exhaust hole is reserved at the top of the pipe culvert.

In a preferred embodiment, during the grouting backfill construction process, grouting is performed through the grouting pipe in a bottom-up grouting manner, and the grouting pipe is closed after the grouting is completed.

Compared with the prior art, the advantages of the present invention are:

The construction method for reinforcing a culvert of the present invention uses corrugated plates to reinforce the culvert, and the construction procedure is simple, the construction period is short, the passage of local personnel and vehicles is not affected, and the construction cost is low. The construction method for reinforcing culverts with corrugated plates has the advantages of high construction efficiency and strong stability for reinforcing culverts. At the same time, in the construction process, by setting up drainage devices, and the corrugated plate has good waterproof and drainage performance, the waterproof and drainage function of the culvert is enhanced, and the disease problem caused by the culvert water accumulation on the culvert is effectively reduced. In addition, in the construction of corrugated board assembly, the corrugated board is connected by lap joint between the longitudinal ring and the ring, and sealant is provided at the lap joint, and a single row of high-strength bolts are used for fastening connection, while the corrugated board is in the lap joint. Double rows of high-strength bolts are used to fasten the connection between the annular upper plate and the plate, which effectively enhances the stability of the assembly connection between the corrugated plates, thereby significantly enhancing the reinforcement effect of the corrugated plates on the culvert.

Description of drawings

The present invention will be described below with reference to the accompanying drawings.

Figure 1 is a transverse cross-sectional view of a reinforced culvert in accordance with the present invention.

Figure 2 is a longitudinal cross-sectional view of a reinforced culvert in accordance with the present invention.

Figure 3 shows the structure of the lateral drainage half pipe installed on the bottom surface of the culvert roof.

Figure 4 shows the structure of the drainage board and the culvert bottom arch foot drain.

Figure 5 is a schematic diagram of the installation of the waterproof and drainage board to the settlement joint.

Figure 6 shows an expanded view of the corrugated board assembly structure.

Figure 7 shows the lap joint structure between adjacent rings of the corrugated sheet.

FIG. 8 is an enlarged view of the area A in FIG. 1 .

In this application, all drawings are schematic drawings, only used to illustrate the principles of the invention, and are not drawn to actual scale.

Detailed ways

The present invention will be described below with reference to the accompanying drawings.

In this application, it should be noted that the extending direction of the culvert is defined as "longitudinal", and the direction perpendicular to the extending direction of the culvert and extending horizontally is defined as "transverse". In addition, it should be noted that the directional terms or qualifiers "upper", "lower" and the like used in the present invention are for the drawings referred to. They are not intended to define the absolute position of the components involved, but can vary on a case-by-case basis.

According to the present invention, a construction method for reinforcing a culvert is provided. The construction method for reinforcing a culvert uses a corrugated plate to reinforce the culvert, the construction procedure is simple, the construction period is short, the passage of local personnel and vehicles is not affected, and the construction cost is low. The construction method for reinforcing the culvert with the corrugated plate has the advantages of high construction efficiency and effective stabilization of the culvert.

The construction method for reinforcing a culvert according to the present invention includes the following construction steps.

First, as shown in FIG. 1 , the existing road surface 101 in the culvert 100 is excavated until the excavation reaches the existing culvert foundation surface 102 . The existing culvert foundation 103 is located under the existing road surface, and the distance between the existing culvert foundation surface 102 and the existing road surface is determined according to the actual working conditions, and concrete is poured after the prefabricated reinforcement 111 is implanted on the excavated existing culvert foundation surface 102 To form the corrugated pipe culvert foundation 110 . In one embodiment, the prefabricated bar 111 is a steel bar, and one end of the steel bar is implanted to a depth of not less than 30 cm, and the other end of the bar is thrown out to a length of not less than 15 cm. The reinforcing bars are distributed in a staggered order, and the transverse spacing is preferably set to 25 cm, and the longitudinal spacing is preferably set to 50 cm. The prefabricated bars 111 can effectively resist the horizontal thrust, and can effectively limit the position of the bottom angle steel (see below) to ensure the stability of the culvert reinforcement.

In an embodiment not shown, the corrugated pipe culvert foundation can also be made of reinforced concrete. Reinforcement cages are bound at the excavated construction positions, and then concrete is poured to form the foundation of corrugated pipe culverts.

According to the present invention, the height of the corrugated pipe culvert foundation 110 is not less than 30 cm, and the width of the excavation is not less than 40 cm. Specifically, for the cover plate culvert, when the corrugated pipe culvert foundation 110 is excavated, if the height from the existing road 101 to the top surface of the cover plate culvert foundation is less than 30 cm, part of the foundation concrete needs to be removed. If the height from the existing road surface to the top surface of the cover plate culvert foundation is greater than 30cm, it is necessary to excavate to the top surface of the existing cover plate culvert foundation to ensure that the height of the formed corrugated pipe culvert foundation 101 is not less than 30cm. At the same time, ensure that the excavation width of the corrugated pipe culvert foundation 110 is not less than 40cm. For the frame culvert, when the corrugated pipe culvert foundation 110 is excavated, if the height from the existing road 101 to the top surface of the frame culvert floor is less than 30cm, in order to ensure the integrity of the existing frame culvert, the excavation boundary can be Transition to pouring sloped foundations between chamfers. If the height from the existing pavement 101 to the top surface of the frame culvert floor is greater than 30cm, it is necessary to excavate to the top surface of the existing frame culvert floor to ensure that the height of the formed corrugated pipe culvert foundation 110 is not less than 30cm. At the same time, ensure that the excavation width of the corrugated pipe culvert foundation 110 is not less than 40cm.

After the construction of the corrugated pipe culvert foundation 110, the existing failed settlement joints 120 (ie construction joints) are rectified, and a drainage device is installed at the settlement joints 120 on the bottom surface of the existing culvert roof 130 to drain the accumulated water in the culvert. outside the culvert, thereby reducing the impact of water accumulation on the culvert.

FIG. 2 shows a longitudinal sectional view of the culvert 100 after reinforcement construction. As shown in FIG. 2 , the drainage device includes a transverse drainage half pipe 131 and a longitudinal drainage full pipe 132 . Among them, the horizontal drainage half pipe 131 is arranged along the settlement joint 120 on the bottom surface of the culvert roof 130, the vertical drainage full pipe 132 is arranged on the top of the side wall of the culvert, and the two ends of the horizontal drainage half pipe 131 are respectively connected to the top of the side walls of the culvert through connecting joints. The longitudinal drainage full pipe 132 is connected. The transverse drainage half pipe 131 is used to guide the accumulated water in the settlement joint to the longitudinal drainage full pipe 132, and the longitudinal drainage full pipe 132 collects the accumulated water in the transverse drainage half pipe 131 and guides it to the outside of the culvert. The drainage device formed by the transverse drainage half pipe 131 and the longitudinal drainage full pipe 132 has the advantages of simple structure, convenient construction, remarkable drainage effect, and can effectively reduce the culvert disease problem caused by culvert water accumulation.

FIG. 3 shows the installation structure of the lateral drainage half-pipe 131 . As shown in FIG. 3 , the lateral drainage half pipe 131 is fixed to the surface of the culvert roof 130 . In one embodiment, the lateral drainage half pipe 131 is fixed to the bottom surface of the culvert roof 130 by means of snaps. At the same time, in order to enhance the sealing performance between the transverse drainage half pipe 131 and the culvert roof 130 and improve the drainage effect of the transverse drainage half pipe 131 , a geotextile 133 is provided between the transverse drainage half pipe 131 and the bottom surface of the culvert roof 130 . Geotextile 133 can effectively reduce the impact of stagnant water on culverts, thereby reducing culvert diseases caused by stagnant water.

As shown in FIG. 4 , the drainage device can also adopt the waterproof drainage board 170 and the arch foot drainage pipe 172 . The waterproof and drainage plate 170 is arranged at the settlement joint 120 of the culvert to extend in the circumferential direction. The two circumferential ends of the waterproof and drainage plate 170 are turned over to the arch foot drainage pipes 172 arranged at the bottom of both sides of the culvert to communicate with the arch foot drainage pipes 172 , so that the water in the ballast bed is guided to the arch foot drainage pipes 172 through the waterproof and drainage plate 170 . , and then drain the culvert water out of the culvert through the arch foot drainage pipe 172 . In one embodiment, the width of the waterproof and drain board 170 is 30 cm. The drainage device adopts the waterproof and drainage board 170 to make the structure simple, the construction is convenient, the drainage effect is remarkable, and it can also effectively reduce the culvert disease problem caused by the culvert water accumulation.

Before installing the waterproof and drainage board 170, sand the existing concrete surface at the construction joint, and the sanding width is not less than 60cm. At the same time, clean up the dust, oil and sundries in the construction joints. In the actual construction, if the concrete surface is pitted and has many holes, it needs to be leveled by applying structural adhesive. After that, glue the self-adhesive shell-type waterproof and drainage board along the construction joint. In one embodiment, the self-adhesive zone can be secured with a nail. In addition, in order to prevent the edge from appearing in the self-adhesive zone, as shown in FIG. 5 , the edge sealing process is performed between the two sides of the waterproof and drainage board 170 and the inner wall of the culvert by the adhesive sealing tape 174 . After that, the longitudinal drainage pipe at the outer diameter of 10cm at the position of the construction joint is wrapped with geotextile. Among them, plum-shaped permeable drainage holes are opened at the construction joints, and structural adhesives are used to seal the edges of the geotextiles. After that, wrap the waterproof and drainage board to the longitudinal drainage pipe at the position of the construction joint, and fix the longitudinal drainage pipe to the bottom of the side wall to form a longitudinally extending arch foot drainage pipe. Connect the arch foot drainage pipe in sections, and use structural adhesive to seal the section connection of the arch foot drainage pipe.

After the installation and construction of the drainage device 130 is completed, the corrugated board 140 is laid to reinforce the culvert 100 . The corrugated board 140 is laid on the inner wall of the culvert, and the end of the corrugated board 140 is fixedly installed in the corrugated pipe culvert foundation 110 .

According to the present invention, the corrugated plates 140 are continuously spliced and installed in a clockwise or counterclockwise direction between the annular upper plates and the plates, and are sequentially lapped and installed between the rings in the longitudinal direction. Before the corrugated board 140 is assembled and laid, scaffolding is set up at the entrance on one side of the culvert, and the corrugated board 140 is installed from the entrance on one side of the culvert. When the corrugated plate 140 is installed, firstly, the first ring corrugated plate is spliced at the entrance, and the culvert sidewall corrugated plate, the top corrugated plate and the sidewall corrugated plate on the ring are spliced clockwise in sequence. Preferably, each ring includes four corrugated boards and is assembled in pieces. After the first ring is assembled, push it into the culvert for a certain distance. When pushing, the angle steel 112 (see Figure 8) is used as the track, and the pushing distance is preferably 60cm, and the pushing action needs to be carried out by machines such as excavators or loaders. Taking the exposed lengthwise overlapping portion of the first ring corrugated plate as the criterion, the same as the first ring assembling steps, continue to install the second ring corrugated plate. By analogy, the rings are assembled by lap joint until all the corrugated plates on the inner wall of the culvert are installed.

FIG. 6 shows an expanded view of the assembled structure of the corrugated sheet 140 . As shown in FIG. 6 , in one embodiment, the corrugated plates 140 are fixedly connected by fixing members between adjacent plates in the same ring. The fixing member preferably adopts double rows of high-strength bolts 141, and the longitudinal center spacing of the bolts 141 is preferably set to 10 cm, and the lateral center spacing is preferably set to 5 cm. The width of each ring of the corrugated plate 140 is 1.2m, and the overlapping parts between adjacent rings of the corrugated plate 140 are connected by a single row of high-strength bolts 141, and the longitudinal center spacing of the bolts 141 is preferably set to 23cm. Preferably, the circumferential seams of the corrugated plates between adjacent rings are connected by staggered seams, thereby improving the sealing performance of the corrugated plates.

FIG. 7 shows the overlapping structure between the longitudinal rings of the corrugated sheet 140 . As shown in FIG. 7 , the corrugated plates 140 adjacent in the longitudinal direction are connected together by overlapping and fixedly connected by bolts 141 . At the same time, in order to enhance the tightness of the connection between the rings of the corrugated plate 140 , a sealant 142 is provided at the overlapping portion of the corrugated plate 140 . The sealant 142 can effectively ensure the sealing performance of the connection between the corrugated plates 140 , thereby enhancing the waterproof and drainage performance of the corrugated plates 140 , effectively reducing the impact of water accumulation on the disease of the culvert 100 , and significantly enhancing the reinforcement effect of the culvert 100 .

In this embodiment, after all the corrugated plates 140 are pushed into place, the ends of the corrugated plates 140 and the corrugated pipe culvert foundation 110 are fixedly installed. As shown in FIG. 8 , the corrugated pipe culvert foundation 110 is provided with angle steels 112 for fixedly connecting the ends of the corrugated plates, and the angle steels 112 are arranged in the longitudinal direction in the corrugated pipe culvert foundation 110 . The angle steel 112 and the end of the corrugated plate 140 are fixedly connected by angle steel connecting bolts 113 . In one embodiment, the width of the two side plates of the angle steel 112 is set to 140mm, and the thickness is set to 10mm. The angle steel connecting bolts 113 connecting the angle steel 112 and the end of the corrugated plate 140 are M20 high-strength bolts.

In one embodiment, the corrugated board 140 is a 200×55 corrugated board, that is, the distance between adjacent wave crests (or adjacent wave troughs) of the corrugated board waveform is 200mm, and the distance between adjacent wave crests and wave troughs is set as 50mm, and the thickness of the corrugated plate 140 is preferably set to 8mm. Preferably, the corrugated plate is made of Q345 steel, and is galvanized outside the corrugated plate, and the thickness of the galvanized plate is not less than 84um. The corrugated plate 140 has a certain rigidity, which can effectively ensure the rigidity and support performance of the corrugated plate 140 , and can significantly improve the reinforcement effect of the culvert 100 . In addition, galvanizing the corrugated board 140 can effectively improve the waterproof performance of the corrugated board 140, prolong the service life of the corrugated board 140, and reduce the problem of disease caused by the culvert water accumulation on the culvert.

After the corrugated board 140 is assembled and laid, grouting is performed between the corrugated board 140 and the inner wall of the culvert 100 for backfilling.

After the corrugated plate 140 is laid and installed, an annular space 150 is formed between the corrugated plate 140 and the inner wall of the culvert 100, and a grouting pipe (not shown) is reserved at the chamfer at one end of the annular space 150 at the upper part of the culvert side wall. ), and a vent (not shown) is reserved at the top of the pipe culvert. During the grouting backfill construction, the two ends of the annular space 150 are first blocked. Preferably, the blocking material is brick, foam or other blocking material. After that, grouting is carried out into the annular space through the reserved grouting pipe. Preferably, the grouting construction adopts a bottom-up grouting method, and the grouting pipe is closed after the grouting is completed. The bottom-up grouting method can effectively ensure that the annular space is fully filled, thereby improving the installation stability of the corrugated plate and improving the reinforcement effect of the culvert 100 . In one embodiment, the grouting material is ordinary cement, concrete or grouting material.

Finally, the construction equipment is removed, the debris in the culvert 100 is removed, the road surface in the culvert 100 is cleaned, and the culvert reinforcement construction is completed.

According to the present invention, all the steel materials used in the culvert reinforcement construction are subjected to anti-corrosion treatment, and the treatment methods can be galvanized, nano-composite powder zinc plated and other treatment methods. In this way, it is beneficial to improve the anti-corrosion performance of the steel, prolong its service life, ensure the stability of the steel, and thus ensure the reinforcement effect of the culvert.

The construction method for reinforcing culverts according to the present invention is especially suitable for reinforcing railway culverts, the reinforcing effect is remarkable, the stability is strong, the stability of railway culverts can be effectively guaranteed, the influence of culverts on railway operation is reduced, and the safety performance of railway culverts is improved. .

According to the construction method for reinforcing a culvert of the present invention, the corrugated plate 140 is used for reinforcing the culvert 100, the construction procedure is simple, the construction period is short, and the passage of local people and vehicles is not affected, and the construction cost is low. The construction method for reinforcing the culvert with the corrugated plate has the advantages of high construction efficiency and strong stability for reinforcing the culvert 100 . At the same time, during the construction process, by setting the drainage device, and the corrugated plate 140 has good waterproof and drainage performance, the waterproof and drainage function of the culvert 100 is enhanced, and the disease problem caused by the accumulated water in the culvert is effectively reduced. In addition, during the assembling construction of the corrugated board 140, the corrugated board 140 is connected by lap joint between the rings in the longitudinal direction, and a sealant 142 is provided at the lap joint, and a single row of high-strength bolts 141 are used to fasten the connection. The corrugated plate 140 is fastened with double rows of high-strength bolts 141 between the annular upper plate and the plate, which effectively enhances the stability of the assembled connection between the corrugated plates 140, thereby significantly enhancing the reinforcement effect of the corrugated plates on the culvert 100. .

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and do not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions described in the foregoing embodiments can still be modified, or some technical features thereof can be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of construction method for reinforcing culvert, which is characterized in that comprising steps of

Road surface (101) existing in culvert is cut and is excavated to existing foundation surface (102), and concrete perfusion is to form wave Line pipe culvert is basic (110)；

The subsiding crack (120) of existing failure is renovated, and the setting draining dress at the subsiding crack of existing culvert top plate (130) bottom surface It sets；

Corrugated plating (140) are laid in the inner wall of the existing culvert, the corrugated plating end is fixedly installed to the corrugated culvert In basis；

Slip casting backfill is carried out between the corrugated plating and the existing culvert inner wall；

Wherein, corrugated plating fragment between circumferential upper plate and plate is assembled, and passes through overlap joint side between ring and ring in the longitudinal direction Formula is assembled, and uses fixing piece installation to form a fixed connection.

2. construction method according to claim 1, which is characterized in that the corrugated plating is after the completion of assembly on circumferential direction along vertical To successively assembly.

3. construction method according to claim 1, which is characterized in that in culvert existing road surface cut excavation width it is not small In 40cm, and the height on corrugated culvert basis is not less than 30cm.

4. construction method according to claim 1 or 3, which is characterized in that pre- in the existing foundation surface implantation After muscle (111) processed, concrete perfusion is to form the corrugated culvert basis.

5. construction method according to claim 4, which is characterized in that the prefabricated muscle is reinforcing bar and is successively interspersed, The implantation depth of the prefabricated muscle is not less than 30cm, throws away length not less than 15cm.

6. construction method according to claim 1 or 3, which is characterized in that bind steel on the existing foundation surface After muscle cage, concrete perfusion is to form the corrugated culvert basis.

7. construction method according to claim 1, which is characterized in that the drainage arrangement includes being arranged on culvert side wall top (132) and the transverse drainage semicanal (131) along subsiding crack arrangement, the transverse drainage semicanal two are managed in the longitudinal drainage in portion entirely End is connect with the full pipe of the longitudinal drainage, and culvert ponding is discharged by the full pipe of the longitudinal drainage.

8. construction method according to claim 1, which is characterized in that the drainage arrangement includes being arranged in the subsiding crack Place and form the drainable waterproofing plate circumferentially extended, the circumferential both ends of the drainable waterproofing plate be connected to the arch springing drainpipe of culvert to Culvert ponding is discharged.

9. construction method according to claim 1, which is characterized in that the corrugated plating is laid with after the installation is completed in the wave It is formed with annulus (150) between card and culvert inner wall, before the annulus carries out slip casting backfill, blocks the ring Longitudinal both ends in shape space, and Grouting Pipe is reserved at one end, gas vent is reserved in pipe culvert top position.

10. construction method according to claim 9, which is characterized in that slip casting backfills in work progress, passes through the slip casting Pipe carries out slip casting using grouting mode from bottom to top, and completes slip casting rear enclosed Grouting Pipe.