A method for reconstructing and reinforcing a culvert

Abstract

The application relates to a channel culvert reconstruction and reinforcement construction method, which has the technical scheme as follows: the geological conditions of the culvert are investigated, and the culvert monitoring measurement points are arranged; holes are drilled on the culvert body, and the hole depth and hole diameter are measured and accepted; a first steel flower pipe is installed on the hole of the culvert body, after the installation of the first steel flower pipe is completed, an anchor rod is installed in the first steel flower pipe; the first steel flower pipe is grouted; holes are drilled on the culvert bottom, and the hole depth and hole diameter are measured and accepted; a second steel flower pipe is installed on the hole of the culvert bottom, and the second steel flower pipe is grouted; the virtual slag of the slurry masonry of the bottom of the culvert is cleaned; the culvert is excavated in sections, after the excavation is completed, first steel bars are bound, first formworks are installed and poured; the culvert beam is cut, after the cutting is completed, second steel bars are bound, after the second steel bars are bound, second formworks are installed and poured; the application has the advantages that the existing line operation can be not affected, rapid construction can be realized, and the safety risk can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to culvert reinforcement construction technical field, more specifically, it relates to a kind of passageway culvert reconstruction and reinforcement construction method. BACKGROUND

[0002] Passageway culvert refers to in highway engineering construction, in order to make highway pass through water channel smoothly without hindering traffic, set in roadbed below and build below road surface drainage hole or water passage, through this structure can let water flow from the bottom of highway.

[0003] In order to ensure the safety of driving on highway, the original passageway culvert in operation is reconstructed, which needs to be reconstructed in the shortest time without affecting the operation of existing line, with great construction difficulty and high construction risk, and the original passageway culvert is eliminated after reconstruction. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application aims to provide a kind of passageway culvert reconstruction and reinforcement construction method, with the advantages of quick construction without affecting the operation of existing line and reducing safety risk.

[0005] The above technical purpose of the present application is realized by the following technical scheme: a kind of passageway culvert reconstruction and reinforcement construction method, comprising: carrying out culvert geological condition investigation, and arranging culvert monitoring measurement point;After completion of investigation, borehole is drilled on culvert body, and the hole depth and hole diameter are measured and accepted;After acceptance, first steel flower pipe is installed on the hole of culvert body, after the installation of first steel flower pipe is completed, anchor rod is installed in first steel flower pipe;After the installation of anchor rod is completed, first steel flower pipe grouting is carried out;After first steel flower pipe grouting is completed, borehole is drilled on culvert bottom, and the hole depth and hole diameter are measured and accepted;After acceptance, second steel flower pipe is installed on the hole of culvert bottom, and second steel flower pipe grouting is carried out;After second steel flower pipe grouting is completed, the virtual slag of culvert bottom is cleaned;After cleaning is completed, culvert warehouse is excavated, after excavation is completed, first steel bar binding is carried out, after first steel bar binding is completed, first formwork installation pouring is carried out;After first formwork installation pouring is completed, culvert beam cutting is carried out, after cutting is completed, second steel bar binding is carried out, after second steel bar binding is completed, second formwork installation pouring is carried out.

[0006] In one embodiment of the above technical scheme, the borehole drilled on the culvert body comprises: water mill drilling machine is used to carry out culvert wall body pilot hole, and the pilot hole is drilled to wall back backfill soil layer;After the pilot hole is completed, the hole is drilled to the design length of the hole by using the down-the-hole drill, and the hole is cleaned.

[0007] In one embodiment of the above technical scheme, the arrangement of culvert monitoring measurement point comprises: a plurality of groups of monitoring measurement points are arranged at both ends and middle of culvert, and the soil quality of culvert base is investigated.

[0008] In an embodiment of the technical scheme, the mounting the anchor rod in the first steel pipe includes inserting a steel bar for fixing the culvert body in the first steel pipe.

[0009] In an embodiment of the technical scheme, the first steel pipe is sequentially provided with a grout stopping section, a grouting section and a triangular bottom bracket; the grouting section is provided with a plurality of grouting holes; and the grouting holes are arranged in a spiral shape along the periphery of the first steel pipe.

[0010] In an embodiment of the technical scheme, the grouting holes are provided with special sealing tapes and / or special gels.

[0011] In an embodiment of the technical scheme, the grouting of the first steel pipe includes injecting cement grout into the first steel pipe through an intelligent grouting machine, and the cement grout penetrates into the culvert wall after passing through the grouting holes on the first steel pipe.

[0012] In an embodiment of the technical scheme, the culvert jump bay excavation includes removing the original laid and supporting beams of the culvert at every interval of a set distance by using the jump bay method, and performing the concrete foundation construction.

[0013] In an embodiment of the technical scheme, the culvert beam cutting includes removing the old concrete bottom plate cross support in the culvert.

[0014] In an embodiment of the technical scheme, the channel culvert reconstruction and reinforcement construction method further includes setting a supporting beam at every interval of a set distance on the top surface of the culvert foundation after the construction is completed.

[0015] In summary, the present application has the following advantages:

[0016] 1. The present application is aimed at the reinforcement construction of the culvert wall body, and is aimed at increasing the net height of the existing channel culvert, avoiding the settlement of the culvert during the whole excavation process, causing safety accidents, not affecting the operation of the existing line during the construction process, having small construction risk, not causing large-area damage to the original channel culvert after the reconstruction, and having high economic benefits.

[0017] 2. In the culvert drilling step of the present application, a water mill drill is used to perform hole guiding, and a down-the-hole drill is used to perform drilling, so as to reduce the disturbance to the culvert in the drilling work, to cause construction disturbance to the existing channel culvert in the smallest range, and to reduce the safety risk.

[0018] 3. Compared with the prior art, the present application has the advantages of simple technology, strong practicality and applicability, strong operability, high construction efficiency, good construction quality and the like, and has great advantages in construction efficiency, construction cost and quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is an exemplary flow chart of the present application;

[0020] Figure 2 is a structural schematic diagram of the original channel culvert in the present application;

[0021] Figure 3 is a structural schematic diagram of the channel culvert after reinforcement in the present application;

[0022] Figure 4 is a structural schematic diagram of the steel flower pipe in the present application.

[0023] In the figure: 1, culvert; 2, first steel flower pipe; 21, stop grouting section; 22, grouting section; 23, triangular bottom bracket; 24, grouting hole; 3, second steel flower pipe; 4, bottom plate cross brace. DETAILED DESCRIPTION

[0024] In order to make the objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings. Several embodiments of the present application are given in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein.

[0025] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0026] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for illustrative purposes, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] The present application will be described in detail below in conjunction with the accompanying drawings and examples.

[0028] As Figures 1 to 3 shown, the present application provides a tunnel reconstruction and reinforcement construction method, comprising:

[0029] S01: Investigate the geological conditions of the tunnel 1, and arrange the tunnel 1 monitoring measurement points;

[0030] S02: After the investigation is completed, drill holes on the tunnel body of the tunnel 1, and measure and accept the hole depth and hole diameter;

[0031] S03: After the acceptance, install the first steel flower pipe 2 on the hole of the tunnel body, and after the installation of the first steel flower pipe 2 is completed, install the anchor rod in the first steel flower pipe 2;

[0032] S04: After the installation of the anchor rod is completed, grout the first steel flower pipe 2;

[0033] S05: After the grouting of the first steel flower pipe 2 is completed, drill holes on the tunnel bottom of the tunnel 1, and measure and accept the hole depth and hole diameter; after the acceptance is passed, install the second steel flower pipe 3 on the hole of the tunnel bottom, and grout the second steel flower pipe 3;

[0034] S06: After the grouting of the second steel flower pipe 3 is completed, clean the virtual slag of the grouted stone on the bottom of the tunnel 1;

[0035] S07: After the cleaning is completed, excavate the tunnel 1 by jumping the warehouse, after the excavation is completed, bind the first steel bar, after the binding of the first steel bar is completed, install the first formwork and pour;

[0036] S08: After the installation and pouring of the first formwork are completed, cut the beam of the tunnel 1, after the cutting is completed, bind the second steel bar, after the binding of the second steel bar is completed, install the second formwork and pour.

[0037] In the embodiment, the first steel flower pipe 2 and the second steel flower pipe 3 are of the same structure and size, the first steel flower pipe 2 is arranged at the body of the culvert 1 and is used for reinforcing the culvert 1 from the side, and the second steel flower pipe 3 is arranged at the bottom of the culvert 1;

[0038] The cleaning of the mortar rubble at the bottom of the culvert 1 is specifically cleaning the impact rubble soil in the culvert 1, and the reinforcing bar binding and the formwork installation and pouring are common technical means for the person skilled in the art, which will not be described here. In the embodiment, the effective diffusion radius of the grouting slurry is not less than 1.2 m, and the grouting amount is controlled at 200 kg / m in principle, and the cavity and the crack should be filled until the grouting amount is measured on site.

[0039] The grouting of the first steel flower pipe 2 on the body of the culvert 1 is the first conventional grouting, and the grouting of the second steel flower pipe 3 on the bottom of the culvert 1 is the second segmented multiple splitting grouting. The installation grouting of the second steel flower pipe 3 is the same as that of the first steel flower pipe 2, and the difference between them is that the second steel flower pipe 3 does not need to be installed with an anchor rod after installation grouting, and the second grouting is performed from top to bottom in sections (the section length is not greater than 5 meters).

[0040] The new culvert reinforcement process can realize rapid construction without affecting the operation of the existing line, and has the following advantages compared with the prior art: simple technology, strong practicality and applicability, strong operability, high construction efficiency, good construction quality and the like, and has great advantages in construction efficiency, construction cost and quality.

[0041] Further, the drilling on the body of the culvert 1 includes: using a water mill drilling machine to drill a hole on the body of the culvert 1 and drill the hole to the backfill soil layer of the wall; after the hole drilling is completed, a down-the-hole drill is used to drill a hole on the body of the culvert 1 and drill the hole to the design length of the hole, and the hole is cleaned.

[0042] In the embodiment, when the hole is drilled on the body of the culvert 1, a water mill drilling machine is used for construction first, which can drill a hole on the body of the culvert 1 to the backfill soil layer of the wall, and then a down-the-hole drill is used for construction, which can drill a hole to the design length of the hole and clean the hole;

[0043] The construction principle of the water mill drilling machine is that the water mill drilling machine adjusts the angle and fixes the water mill drilling machine according to the design angle by erecting a working platform (such as a scaffold) as required, and after the angle is verified to meet the design requirements, the water mill drilling machine is fixed on the working platform, and the hole can be drilled on the body; the construction principle of the down-the-hole drill is the same as that of the water mill drilling machine.

[0044] In addition, after the hole drilling operation is completed, the down-the-hole drill is used for wall back drilling construction, which can reduce the disturbance in the work, the hole is cleaned, which can prevent the hole from being blocked due to subsequent vehicle disturbance, and the steel flower pipe is installed in time after the hole drilling is completed.

[0045] Furthermore, the arrangement of monitoring and measuring points of the culvert 1 includes: arranging a plurality of monitoring and measuring points at both ends and in the middle of the culvert 1, and investigating the soil quality of the base of the culvert 1.

[0046] In this embodiment, in the early stage of culvert construction, several groups of monitoring and measuring points (6 groups can be used) are arranged at both ends and the middle position of culvert 1. The monitoring and measuring points are points for detecting elevation and displacement parameters, and investigating whether the soil quality of the base of culvert 1 is good to be suitable for construction.

[0047] Furthermore, the installation of anchor rods in the first steel flower tube 2 includes: inserting steel bars for fixing the culvert body 1 into the first steel flower tube 2 .

[0048] In this embodiment, steel bars are inserted into the first steel flower tube 2 . The steel bars may be φ22 steel bars. The steel bars may be used to fix the culvert body 1 .

[0049] Furthermore, if Figure 4 As shown, a grouting section 21, a grouting section 22 and a triangular bottom bracket 23 are sequentially provided on the first steel flower tube 2; a plurality of grouting holes 24 are provided on the grouting section 22; the grouting holes 24 are arranged in a spiral shape around the first steel flower tube 2.

[0050] In this embodiment, the first and second steel flower tubes 2 and 3 have the same structure. The first steel flower tube 2 is made of a hollow steel tube with a diameter of 89 mm and a wall thickness of 4 mm. The steel tube is rust-proofed before production (to prevent impurities from affecting grouting). The first steel flower tube 2 is provided with a grouting stop section 21, a grouting section 22, and a triangular bottom bracket 23 in sequence, wherein:

[0051] ① The grouting stop section 21 is a one-meter interval section at the input end of the steel pipe. No grouting holes 24 are provided on the grouting stop section 21. This guides the grouting of the steel pipe and prevents the grout from freely escaping from the front section of the steel pipe, thereby ensuring the grouting pressure.

[0052] ② The triangular bottom bracket 23 is set at the output end of the steel pipe. The triangular bottom bracket 23 is made of 5mm thick steel plate welded and sealed. Its end is a triangular tip, which can play a guiding role when the steel pipe is installed and inserted into the hole of the culvert;

[0053] ③ The grouting section 22 is arranged between the grouting stop section 21 and the triangular bottom bracket 23. A plurality of grouting holes 24 are arranged on the grouting section 22. The grouting holes 24 are arranged every 8 cm along the axis of the steel pipe and every 45° along the radial direction of the steel pipe (that is, the grouting holes 24 are arranged in a spiral shape around the four sides of the steel pipe). The diameter of the grouting holes 24 is 8 mm. The grouting holes 24 can allow the cement slurry in the steel pipe to pass through and penetrate into the wall of the culvert 1.

[0054] Further, a special tape and / or a special gel for sealing are arranged on the grouting hole 24.

[0055] In the embodiment, the grouting hole 24 is sealed by a special tape and a special gel for grouting, and the special tape and the special gel are used for the segmented secondary splitting grouting process. The first grouting is performed outside the pipe, the grouting hole 24 on the pipe is blocked by the tape to prevent the cement slurry from entering the steel pipe and blocking the steel pipe, and the conditions for the second secondary splitting grouting from the hole are provided.

[0056] Further, the first steel pipe 2 grouting comprises: injecting the cement slurry into the first steel pipe 2 by the intelligent grouting all-in-one machine, and the cement slurry penetrates into the culvert 1 wall after passing through the grouting hole 24 on the first steel pipe 2.

[0057] In the embodiment, the intelligent grouting all-in-one machine is an intelligent grouting device capable of automatically controlling the grouting pressure and the grouting mixing ratio, which is a common technical means for those skilled in the art and will not be described here. The grouting material of the application can be configured by using pure cement slurry. The PVC pipe grouting is used for the first grouting, the mixing ratio of cement to water is 1:0.5, and the grouting pressure is 0.3-0.5 MPa. The splitting grouting is used for the second grouting, the mixing ratio of cement to water is 1:0.7, the splitting pressure of the second grouting is 3-5 MPa, and the continuous stable grouting pressure is 2 MPa.

[0058] 2% of high-efficiency early-strength water reducing agent should be penetrated during grouting, and the time interval between the first grouting and the second grouting can be controlled within 6-12 hours. The grouting pressure can be adjusted according to the field test data to meet different grouting requirements.

[0059] The working principle of the intelligent grouting all-in-one machine is as follows: after the first steel pipe 2 and the second steel pipe 3 are arranged with the working platform, the intelligent grouting all-in-one machine is positioned at the working platform, the grouting mixing ratio is adjusted, and then the grouting is performed from top to bottom. The grouting process is performed by using the hole skipping grouting process to skip one hole for every one grouting, so as to avoid the hole skipping.

[0060] Further, the culvert skip-bin excavation comprises: excavating and removing the original laying and supporting beam of the culvert 1 every interval of a set distance by using the skip-bin method, and performing the concrete foundation construction.

[0061] In the embodiment, the set distance for excavation is 2 meters. In order to ensure the safety of the original culvert 1, the full-face excavation should be avoided when the original laying of the culvert 1 is excavated, and therefore the skip-bin method is used for excavation, and the original laying and supporting beam of the culvert 1 are excavated and removed every 2 meters, so as to reduce the construction risk during excavation.

[0062] Further, the culvert beam cutting comprises: removing the old concrete bottom plate cross brace 4 in the culvert 1.

[0063] In the embodiment, the culvert beam is cut to remove the original old concrete bottom plate cross brace 4 in the culvert 1 before construction, and the original culvert 1 edge is cut and the foundation bottom surface is excavated.

[0064] Further, the culvert reconstruction and reinforcement construction method further comprises: after the construction is completed, a support beam is arranged on the foundation top surface of the culvert 1 at a certain interval.

[0065] In the embodiment, the interval of the foundation top surface of the culvert 1 is 2 meters, and after the construction is completed, a new permanent support beam can be arranged on the foundation top surface of the concrete layer at an interval of 2 meters.

[0066] The culvert reconstruction and reinforcement construction method has the advantages of quick construction without affecting the operation of the existing line and reducing the safety risk.

[0067] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall be considered as falling within the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A method for reconstructing and reinforcing a culvert, characterized by, The utility model relates to a kind of method for reinforcing culvert, including: Carrying out culvert geological condition investigation, and arranging culvert monitoring measurement point; After completing investigation, drilling hole on culvert culvert body: first, using water mill drilling machine to carry out culvert wall body pilot hole to wall backfill soil layer, then using down-the-hole drill to drill hole to hole design length and multiple hole cleaning, and the hole depth hole diameter is measured and accepted; After acceptance, install first steel flower pipe on the hole of culvert body, install anchor rod in first steel flower pipe after first steel flower pipe installation is completed; After anchor rod installation is completed, first steel flower pipe grouting is carried out; After first steel flower pipe grouting is completed, hole is drilled on culvert culvert bottom, and the hole depth hole diameter is measured and accepted; After acceptance, install second steel flower pipe on the hole of culvert bottom, carry out segmented secondary splitting grouting from top to bottom to second steel flower pipe, and the segmented length is not more than 5 meters; Second steel flower pipe grouting is completed, and the virtual slag of mortar masonry stone at the bottom of culvert is cleaned; After cleaning is completed, original laying and support beam of culvert is removed every 2 meters using skip method, first reinforcement binding is carried out after excavation is completed, and first formwork installation pouring is carried out after first reinforcement binding is completed; After first formwork installation pouring is completed, culvert beam cutting is carried out, and the culvert beam cutting includes: carrying out the removal of old concrete bottom plate cross brace in culvert, second reinforcement binding is carried out after cutting is completed, and second formwork installation pouring is carried out after second reinforcement binding is completed; After construction is completed, support beam is set every 2 meters on the top surface of culvert foundation, and grouting section, grouting section and triangular bottom bracket are sequentially arranged on the first steel flower pipe;A plurality of grouting holes are arranged on the grouting section;The grouting hole is arranged in spiral shape along the periphery of first steel flower pipe; The structure of first steel flower pipe and second steel flower pipe is same; Specialized adhesive tape and / or specialized gel are arranged on the grouting hole for sealing, and the specialized adhesive tape and the specialized gel are used for segmented secondary splitting grouting process, first grouting outside pipe, using adhesive tape to block grouting hole on pipe, to prevent cement slurry from entering steel pipe and blocking steel pipe, to provide conditions for second secondary splitting grouting from hole.

2. The method of claim 1, wherein The arrangement of culvert monitoring measurement point includes: arranging a plurality of groups of monitoring measurement points at both ends and middle of culvert, and investigating culvert base soil.

3. The method of claim 1, wherein the method further comprises: The installation of anchor rod in first steel flower pipe includes: inserting the steel bar for fixing culvert culvert body in first steel flower pipe.

4. The method of claim 3, wherein the method further comprises: The first steel flower pipe grouting includes: injecting cement slurry into the first steel flower pipe through intelligent grouting integrated machine, and the cement slurry penetrates into culvert wall after passing through grouting hole on first steel flower pipe.

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