Non-excavation repairing method suitable for brick box culvert

Abstract

The invention relates to a non-excavation repair method suitable for a brick box culvert, which comprises the following steps: lowering a bottom plate, wall plates and a top plate, and splicing the bottom plate, the wall plates and the top plate into a prefabricated box culvert along the inner side of the existing box culvert; and the gap between the prefabricated box culvert and the existing box culvert is filled. Concrete slabs matched with an existing box culvert are prefabricated in advance, and are assembled along the inner side of the existing box culvert after being lowered, so that the internal main body of the old box culvert is reinforced, the self strength of the existing box culvert is improved, the blank of trenchless repair of the deep-buried brick (stone) built box culvert is effectively filled, the design service life of the box culvert is greatly prolonged, the safety risk is small, and the construction cost is reduced. The construction period is short and the construction cost is low.

Description

Technical Field

[0001] The invention relates to the fields of environmental protection and municipal engineering, and in particular to a trenchless repair method suitable for a brick box culvert. Background Art

[0002] At present, rainwater and sewage culverts in urban areas are generally made of brick (stone) retaining walls. Urbanization construction has caused many brick (stone) culverts to be buried deep underground in old urban areas, making them difficult to excavate. If they are allowed to continue to be destroyed, they may cause ground subsidence and house collapse in urban areas.

[0003] For sections of brick (stone) box culverts that are not seriously damaged and have defects such as leakage, deformation, and dislocation, if internal cast-in-place reinforced concrete box culverts are used, it will be difficult to tie the steel bars and pour the concrete within the limited space of the box culvert, resulting in high safety risks, a long construction period, and high construction costs. Summary of the invention

[0004] Based on the above description, the present invention provides a trenchless repair method suitable for brick box culverts to solve the problems of high safety risks, long construction period and high construction costs in related technologies.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a non-excavation repair method suitable for brick box culverts, which includes the following steps: lowering the bottom plate, wall plate and top plate, and assembling them into a prefabricated box culvert along the inner side of the existing box culvert; filling the gap between the prefabricated box culvert and the existing box culvert.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the wall panel includes an A plate and a B plate, one side of the A plate is provided with a notch, one side of the B plate is provided with a protrusion corresponding to the notch, and the A plate and the B plate are assembled into the wall panel.

[0008] Furthermore, both ends of the A plate and the B plate are provided with snap-in grooves, and both ends of the bottom plate and the top plate are provided with snap-in blocks matching the snap-in grooves, and the bottom plate, the wall plate and the top plate are snap-fitted and installed.

[0009] Furthermore, after lowering the bottom plate, the wall plate and the top plate, the method further includes: lifting the bottom plate and the wall plate; after pushing the top plate to a designated position, supporting and pushing the top plate to a designated elevation using a hydraulic device.

[0010] Furthermore, the gap distance between the prefabricated box culvert and the existing box culvert is greater than or equal to 50 mm.

[0011] Furthermore, when the gap is less than 50 mm, cement mortar is used to fill the gap; when the gap is greater than 50 mm, self-compacting fine stone concrete is used to cast and fill the gap.

[0012] Furthermore, before lowering the bottom plate, wall plate and top plate, it also includes: investigating the dimensions of each inspection wellhead of the box culvert section to determine the length and width of the prefabricated plate that can be lowered; and designing the reinforcement of the bottom plate, wall plate and top plate according to external working conditions.

[0013] Furthermore, the water-facing surface of the prefabricated box culvert is provided with a stainless steel plate.

[0014] Furthermore, special-shaped prefabricated panels are provided at the corners of the prefabricated box culvert.

[0015] Furthermore, the joints between the bottom plate, the wall plate and the top plate are sealed with stainless steel quick locks.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: By prefabricating concrete slabs that match the existing box culvert in advance and assembling them along the inner side of the existing box culvert after lowering, the internal body of the old box culvert can be reinforced, the existing box culvert's own strength can be improved, and the gap in non-excavation repair of deeply buried brick (stone) box culverts can be effectively filled. The design service life of the box culvert is greatly improved, the safety risk is small, the construction period is short, and the construction cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a trenchless repair method for a brick box culvert provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a prefabricated box culvert provided in an embodiment of the present invention; Figure 3 A schematic diagram of assembling a wall panel provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a prefabricated panel pushing vehicle provided in an embodiment of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Prefabricated box culvert; 11. Bottom plate; 12. Wall plate; 121. Plate A; 122. Plate B; 13. Top plate; 2. Existing box culvert; 3. Overburden layer; 4. Fine stone concrete pumping pipeline; 5. Gap between new and old box culverts; 6. Prefabricated plate pusher. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0020] The embodiment of the present invention provides a trenchless repair method suitable for a brick box culvert, which can solve the problems of high safety risk, long construction period and high construction cost in the related technology.

[0021] See also Figure 1 As shown, a trenchless repair method suitable for a brick box culvert provided by an embodiment of the present invention comprises the following steps: lowering a bottom plate 11, a wall plate 12 and a top plate 13, and assembling them along the inner side of an existing box culvert 2 to form a prefabricated box culvert 1; and filling the gap between the prefabricated box culvert 1 and the existing box culvert 2. In this embodiment, by prefabricating a concrete slab matching the prefabricated box culvert 1 in advance, lowering it and assembling it along the inner side of the prefabricated box culvert 1, the internal body of the old box culvert is reinforced in a short time, the self-strength of the existing box culvert is improved, and the gap in trenchless repair of deep-buried brick (stone) box culverts is effectively filled. The design service life of the box culvert is greatly improved, the safety risk is small, the construction period is short, and the construction cost is low.

[0022] Specifically, the construction steps are as follows: (1) Inspect and investigate the pipe culvert to determine the damage of the pipe culvert and the scope of repair.

[0023] (2) Investigate the dimensions of each inspection well opening in the box culvert section to determine the length and width of the precast panels that can be lowered.

[0024] (3) Design the reinforcement of the top plate 13, wall plate 12 and bottom plate 11 according to the external working conditions.

[0025] (4) The repaired section of the box culvert should be sealed and desilted; the silt and waste should be removed, especially the solid waste, to ensure the smooth installation of the precast panels at a later stage.

[0026] (5) Assembly and commissioning of prefabricated panel pusher 6; (6) The bottom plate 11, the wall plate 12 and the top plate 13 are lowered and installed; (7) Filling the gap between the new and old box culverts. When the gap is less than 50 mm, cement mortar is recommended; when the gap is larger than 50 mm, self-compacting fine stone concrete is recommended.

[0027] Preferably, according to the different needs of domestic sewage or industrial sewage, an anti-corrosion outer membrane is arranged on the water-facing surface in advance when the prefabricated panels are manufactured to ensure that the repaired culvert meets the regulatory requirements.

[0028] See also Figure 1As shown, preferably, the gap 5 between the new and old box culverts is greater than or equal to 50 mm, which is convenient for later filling with fine stone concrete; the gap 5 between the new and old box culverts at the top is greater than or equal to the thickness of the prefabricated top plate + 50 mm, which is convenient for later installation of the top plate 13; the steel bars and thickness of the wall panels 12 and the bottom plates 11 should be determined according to the design conditions.

[0029] See also Figure 3 As shown, in some embodiments, the wall panel 12 includes a plate A 121 and a plate B 122. The plate A 121 and the plate B 122 should be able to be embedded in each other, a recess is arranged on one side of the plate A 121, and a protrusion is arranged on one side of the plate B 122. The size of the protrusion should be slightly smaller than the size of the recess to ensure that the wall panels can be perfectly connected.

[0030] Preferably, when the B plate 122 is inserted close to the A plate 121 , a flexible waterproof material such as asphalt hemp should be applied to the protrusion of the B plate 122 .

[0031] See also Figure 4 As shown, the prefabricated panel pusher 6 is assembled from different rods. If the bottom elevation of the inspection well is lower than the bottom elevation of the box culvert, it can be temporarily raised to facilitate the pusher to move smoothly in the cover culvert after the prefabricated panels are lowered.

[0032] When in use, a temporary electric suspension device can be installed on the upper part of the bracket of the prefabricated panel pushing vehicle 6 to lift the lower bottom plate 11 and the side wall panels 12. After the top plate 13 is pushed to the specified position, it is first lifted to a certain elevation and then supported and pushed to the specified elevation by a hydraulic device.

[0033] In some embodiments, the top plate 13, the wall plate 12 and the bottom plate 11 are precast concrete plates with stainless steel plates on the water-facing side, and the precast plates are assembled to form an integral box culvert.

[0034] In some embodiments, special-shaped prefabricated panels can be specially customized at the corners of the box culvert; stainless steel quick-lock seals can be used for the sealing of the joints of the prefabricated panels.

[0035] In some embodiments, the prefabricated panels at both ends of the box culvert are installed last to ensure that the concrete box culvert at the end can be well fixed.

[0036] In some embodiments, fine stone concrete is used to seal the back surface of the box culvert and the front surface of the original brick (stone) retaining wall.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0039] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0040] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A trenchless repair method suitable for brick box culverts, characterized in that: It includes the following steps: Lowering the bottom plate (11), the wall plate (12) and the top plate (13), and assembling them along the inner side of the existing box culvert (2) to form a prefabricated box culvert (1); Filling the gap between the prefabricated box culvert (1) and the existing box culvert (2).

2. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: The wall panel (12) comprises an A panel (121) and a B panel (122); one side of the A panel (121) is provided with a notch; one side of the B panel (122) is provided with a protrusion corresponding to the notch; the A panel (121) and the B panel (122) are assembled to form the wall panel (12).

3. The trenchless repair method suitable for brick box culvert according to claim 2 is characterized in that: Both ends of the A plate (121) and the B plate (122) are provided with snap-fitting grooves, and both ends of the bottom plate (11) and the top plate (13) are provided with snap-fitting blocks matching the snap-fitting grooves, and the bottom plate (11), the wall plate (12) and the top plate (13) are snap-fitted and installed.

4. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: After lowering the bottom plate (11), the wall plate (12) and the top plate (13), the method further comprises: Lifting the bottom plate (11) and the wall plate (12); After the top plate (13) is pushed to a specified position, it is supported and pushed to a specified elevation using a hydraulic device.

5. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: The gap distance between the prefabricated box culvert (1) and the existing box culvert (2) is greater than or equal to 50 mm.

6. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: When the gap is less than 50 mm, cement mortar is used to fill the gap; when the gap is greater than 50 mm, self-compacting fine stone concrete is used to cast and fill the gap.

7. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: Before lowering the bottom plate (11), the wall plate (12) and the top plate (13), the method further comprises: Investigate the dimensions of each inspection well opening in the box culvert section to determine the length and width of the precast panels that can be lowered; The reinforcement of the bottom plate (11), the wall plate (12) and the top plate (13) is designed according to external working conditions.

8. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: The water-facing surface of the prefabricated box culvert (1) is provided with a stainless steel plate.

9. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: Special-shaped prefabricated panels are provided at the corners of the prefabricated box culvert (1).

10. The trenchless repair method suitable for brick box culvert according to claim 1 is characterized in that: The joints between the bottom plate (11), the wall plate (12) and the top plate (13) are sealed with stainless steel quick-locks.

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