Supporting type lengthening and reinforcing structure for dike-penetrating box culvert

Abstract

The utility model provides an embankment-penetrating box culvert supporting type extension reinforcing structure, and relates to the technical field of water conservancy reinforcing engineering. According to the lengthening reinforcing structure, the lengthening end of the reserved section box culvert is tightly attached to the anchoring end of the lengthening section box culvert through the joint effect of existing steel bars, implanted anchor bars and a step type supporting face, and vertical staggered joint displacement at the joint of the new box culvert and the old box culvert is effectively limited; due to the deformation coordination function of the permanent settlement joint, the construction difficulty is further reduced, the linear construction period is shortened, and the anti-seepage effect is improved, so that the engineering quality safety and the structural stability are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy reinforcement engineering, in particular to a dike-through box culvert supporting type extension reinforcement structure. Background Art

[0002] Box culverts are common structures through dikes in water conservancy projects, primarily serving the purpose of irrigation, drainage, and water system connectivity. In the early stages of dike construction, several culverts were typically constructed along the dike line. However, due to limitations in technology, development concepts, and project investment, the flood control roads atop the box culverts were constructed to low standards, resulting in narrow road widths and low traffic capacity. Consequently, widening and thickening the dikes was urgently needed to improve accessibility on the dike crests.

[0003] After the levee was widened and thickened, the original through-embankment culvert tunnel was insufficient in length and the retaining wall height at the culvert outlet was insufficient, necessitating further extension and reinforcement of the existing box culvert. Traditionally, the extended end of the tunnel section to be retained was cut and chiseled off to form a vertical flat edge, with settlement joints and new structural waterstops installed. Deformation coordination was achieved with the newly cast adjacent box culvert section by means of hoops. In engineering practice, because the top of the extended and reinforced box culvert section was composed of newly constructed backfill and new pavement structures, the additional backfill and traffic loads caused significant vertical displacement of the extended and reinforced box culvert foundation. However, the existing retained box culvert section was free of additional loads, and the old culvert foundation had settled relatively steadily after years of operation. The uneven vertical settlement of the new and old through-embankment box culverts resulted in inter-section misalignment, forming vertical weak zones along the joint surfaces. This in turn caused cracking and damage to the joint waterstops, seriously impacting project safety. In addition, because the joints, water stops and hoops are all set at the junction of the new and old box culverts, concrete pouring is difficult to implement, the linear construction period is long, and the construction quality is difficult to guarantee. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a supporting extension and reinforcement structure for a dike box culvert, which solves the problem that uneven settlement of the new and old box culverts in the dike box culvert extension project can easily lead to safety and quality accidents.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A supporting extension and reinforcement structure for a dike-crossing box culvert, comprising: a retained section box culvert, an extended section box culvert, and a newly built box culvert;

[0007] The extended end of the reserved section box culvert is excavated to form a stepped supporting surface;

[0008] The extended box culvert is cast in situ behind the stepped support surface, and the anchor end of the extended box culvert is connected to the stepped support surface through the stepped press-fit surface; the free end of the extended box culvert is connected to several sections of newly built box culverts;

[0009] Permanent settlement joints are provided between the extended box culvert and the adjacent newly built box culvert, and between adjacent newly built box culverts.

[0010] Preferably, the stepped supporting surface is roughened before pouring the extended box culvert section, and the roughening depth is 3 cm to 5 cm.

[0011] Preferably, the horizontal and vertical steel bars of the retained section box culvert extending out from the stepped supporting surface are retained.

[0012] Preferably, the stepped supporting surface is provided with holes arranged in a plum blossom shape and anchor bars are implanted therein, and the implantation position of the anchor bars avoids the existing steel bars retained by the stepped supporting surface.

[0013] Preferably, the horizontal or vertical spacing S1 of the anchor bars is 20 cm to 30 cm, and the margin S2 between the anchor bars and the outer wall of the retained section box culvert is not less than 5 cm.

[0014] Preferably, the permanent settlement joint is filled with a caulking plate, the inner wall seam of the permanent settlement joint is sealed by a caulking sealant, and the box culverts on both sides of the permanent settlement joint are connected by a base cloth, a water stop and a hoop;

[0015] The base fabric is attached to the inner wall of the box culvert and arched inwards at the permanent settlement joints;

[0016] The waterstop is pre-buried in the box culvert;

[0017] The hoop is arranged on the outer wall of the box culvert.

[0018] Preferably, the width W of the permanent settlement joint is 2 cm to 3 cm.

[0019] Preferably, both sides of the tire base cloth are coated with a single-component polyurea waterproof coating, and the total thickness of the polyurea is 4mm to 6mm.

[0020] Preferably, the caulking plate is made of low-foaming high-pressure polyethylene closed-cell foam plastic board;

[0021] The caulking sealant is polysulfide sealant, and the sealing depth t is 1.5cm to 3cm;

[0022] The waterstop is made of red copper sheet waterstop with a thickness of 1.2 mm, a nose height of 5 cm to 6 cm, and a nose width of 1.2 cm to 1.6 cm.

[0023] Preferably, the axial length L of the extended box culvert is 1m to 2m.

[0024] The utility model provides a supporting extension reinforcement structure for a dam-crossing box culvert. Compared with the existing technology, it has the following advantages:

[0025] In the utility model, the extended end of the retained box culvert is tightly fitted with the anchor end of the extended box culvert through the combined action of the existing steel bars, implanted anchor bars and stepped supporting surface, effectively limiting the vertical staggered displacement at the junction of the new and old box culverts; the deformation coordination function of the permanent settlement joint further reduces the construction difficulty, shortens the linear construction period, and improves the anti-seepage effect, thereby ensuring the quality safety of the project and the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a structural diagram of the extended reinforcement structure in an embodiment of the present utility model;

[0028] Figure 2 This is an exploded view of the extended reinforcement structure in the embodiment of the present utility model, ignoring the existing steel bars;

[0029] Figure 3 This is an exploded view of the extended reinforcement structure in the embodiment of the present utility model;

[0030] Figure 4 This is a front view of the extended end of the retained section box culvert in the embodiment of the present utility model;

[0031] Figure 5 This is a schematic structural diagram of a permanent settlement joint in an embodiment of the present utility model;

[0032] The reference numerals in the figure are set as: retained section box culvert 10, stepped supporting surface 11, anchor bar 12, existing steel bar 13, extended section box culvert 20, stepped pressing surface 21, new box culvert 30, filling plate 31, caulking sealant 32, base cloth 33, water stop 34, and hoop 35. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The embodiment of the present application solves the problem that uneven settlement of new and old box culverts in the dike box culvert extension project may easily lead to safety and quality accidents by providing a supporting extension reinforcement structure for the dike box culvert.

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] Example:

[0037] like Figures 1 to 5 As shown, the utility model provides a supporting extension reinforcement structure for a dike-crossing box culvert, the extension reinforcement structure comprising: a retained section box culvert 10, an extended section box culvert 20 and a newly built box culvert 30;

[0038] The extended end of the reserved box culvert 10 is excavated to form a stepped supporting surface 11;

[0039] The extended box culvert 20 is cast in situ behind the stepped support surface 11 in the form of newly constructed reinforced concrete. The anchoring end of the extended box culvert 20 is connected to the stepped support surface 11 through the stepped pressing surface 21. The free end of the extended box culvert 20 is connected to several sections of newly constructed box culverts 30.

[0040] Permanent settlement joints are provided between the extended section box culvert 20 and the adjacent newly built box culvert 30 and between adjacent newly built box culverts 30 .

[0041] The stepped supporting surface 11 is roughened before pouring the extended box culvert 20 to remove the carbonized layer on the concrete surface and expose fresh gravels inside. The roughening depth is 3 cm to 5 cm.

[0042] like Figure 3 、 Figure 4 As shown, the horizontal and vertical steel bars extending out of the stepped supporting surface 11 of the retained section box culvert 10 are retained, and the retained steel bars are derusted.

[0043] like Figure 4 As shown, the stepped supporting surface 11 is provided with holes arranged in a plum blossom shape and anchor bars 12 are implanted therein. The implantation position of the anchor bars 12 avoids the existing steel bars 13 retained by the stepped supporting surface 11 .

[0044] like Figure 4 As shown, the horizontal or vertical spacing S1 of the anchor bars 12 is 20 cm to 30 cm, and the margin S2 between the anchor bars 12 and the outer wall of the retained section box culvert 10 is not less than 5 cm.

[0045] The anchoring glue of the anchor bar 12 adopts Class A modified epoxy structural adhesive.

[0046] like Figure 5As shown, the permanent settlement joint is filled with a caulking plate 31, the inner wall seam of the permanent settlement joint is sealed by a caulking sealant 32, and the box culverts on both sides of the permanent settlement joint are connected by a tire base cloth 33, a water stop 34 and a hoop 35;

[0047] The tire base fabric 33 is attached to the inner wall of the box culvert and arches inward at the permanent settlement joint, which is conducive to adapting to settlement deformation and preventing the tire base fabric 33 from tearing;

[0048] The water stop 34 is pre-buried in the box culvert;

[0049] The hoop 35 is arranged on the outer wall of the box culvert.

[0050] like Figure 5 As shown, the width W of the permanent settlement joint is 2 cm to 3 cm.

[0051] The filling plate 31 is made of low-foaming high-pressure polyethylene closed-cell foam plastic plate.

[0052] The caulking sealant 32 is made of polysulfide sealant, and the sealing depth t is 1.5 cm to 3 cm.

[0053] Both sides of the tire base fabric 33 are coated with a single-component polyurea waterproof coating, and the total thickness of the polyurea is 4mm to 6mm.

[0054] The waterstop 34 is made of copper sheet with a thickness of 1.2 mm, a nose height of 5 cm to 6 cm, and a nose width of 1.2 cm to 1.6 cm, which is slightly smaller than the seam width and is conducive to deformation coordination.

[0055] The axial length L of the extended box culvert 20 is 1m to 2m.

[0056] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0057] In the embodiment of the present invention, the extended end of the retained section box culvert 10 is tightly fitted with the anchor end of the extended section box culvert 20 through the combined action of the existing steel bars 13, the implanted anchor bars 12 and the stepped supporting surface 11, effectively limiting the vertical staggered displacement at the junction of the new and old box culverts; the deformation coordination function of the permanent settlement joint further reduces the construction difficulty, shortens the linear construction period, and improves the anti-seepage effect, thereby ensuring the quality safety and structural stability of the project.

[0058] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A supporting extension reinforcement structure for a dike-crossing box culvert, characterized in that: The extension and reinforcement structure comprises: a retained section box culvert (10), an extended section box culvert (20) and a newly built box culvert (30); The extended end of the reserved section box culvert (10) is excavated to form a stepped supporting surface (11); The extended box culvert (20) is cast in situ behind the stepped supporting surface (11), and the anchoring end of the extended box culvert (20) is connected to the stepped supporting surface (11) through the stepped pressing surface (21); the free end of the extended box culvert (20) is connected to several sections of newly built box culverts (30); Permanent settlement joints are provided between the extended section box culvert (20) and the adjacent newly built box culvert (30), and between adjacent newly built box culverts (30).

2. The cross-embankment box culvert support type extension reinforcement structure according to claim 1, characterized in that: The stepped supporting surface (11) is roughened before the extended box culvert (20) is poured, and the roughening depth is 3cm to 5cm.

3. The cross-embankment box culvert support type extension reinforcement structure according to claim 1, characterized in that: The horizontal and vertical reinforcement bars of the retained section box culvert (10) extending out of the stepped supporting surface (11) are retained.

4. The cross-embankment box culvert support type extension reinforcement structure according to claim 1, characterized in that: The stepped supporting surface (11) is perforated in a plum blossom shape and anchor bars (12) are implanted therein. The implantation position of the anchor bars (12) avoids the existing steel bars (13) retained by the stepped supporting surface (11).

5. The cross-embankment culvert support type extension reinforcement structure according to claim 4, characterized in that: The horizontal or vertical spacing S1 of the anchor bars (12) is 20 cm to 30 cm, and the margin S2 between the anchor bars (12) and the outer wall of the retained section box culvert (10) is not less than 5 cm.

6. The cross-embankment culvert support type extension reinforcement structure according to claim 1, characterized in that: The permanent settlement joint is filled with a caulking plate (31), the inner wall seam opening of the permanent settlement joint is sealed by a caulking sealant (32), and the box culverts on both sides of the permanent settlement joint are connected by a tire base cloth (33), a water stop (34) and a hoop (35); The tire base cloth (33) is attached to the inner wall of the box culvert and arched inwards at the permanent settlement joint; The water stop (34) is pre-buried in the box culvert; The hoop (35) is arranged on the outer wall of the box culvert.

7. The cross-embankment box culvert support type extension reinforcement structure according to claim 1, characterized in that: The width W of the permanent settlement joint is 2 cm to 3 cm.

8. The cross-embankment box culvert support type extension reinforcement structure according to claim 6, characterized in that: Both sides of the tire base cloth (33) are coated with a single-component polyurea waterproof coating, and the total thickness of the polyurea is 4mm to 6mm.

9. The cross-embankment box culvert support type extension reinforcement structure according to claim 6, characterized in that: The caulking plate (31) is made of a low-foaming high-pressure polyethylene closed-cell foam plastic plate; The caulking sealant (32) is made of polysulfide sealant, and the sealing depth t is 1.5 cm to 3 cm; The water stop (34) is made of a copper sheet with a thickness of 1.2 mm, a nose height of 5 cm to 6 cm, and a nose width of 1.2 cm to 1.6 cm.

10. The cross-embankment culvert support type extension reinforcement structure according to claim 1, characterized in that: The axial length L of the extended section box culvert (20) is 1m to 2m.

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