Connection node and construction method of new and old inlet box culverts

Abstract

The present invention discloses a connection node and construction method for new and old inlet culverts; it includes an old inlet culvert and a new inlet culvert; one end of the new inlet culvert is connected to the side wall of the old inlet culvert, and this end includes a permanently used culvert and a temporary diversion culvert; the permanently used culvert is connected to the old inlet culvert to form a corner area; the position where the temporary diversion culvert is connected to the old inlet culvert is upstream of the corner area, and when the permanently used culvert and the old inlet culvert are connected for construction, the water passageways in the new inlet culvert and the old inlet culvert are communicated to conduct water diversion, so that the connection construction between the permanently used culvert and the old inlet culvert is completed under dry operation conditions. The application of the present invention enables the construction of the connection node of the new and old inlet culverts without water interruption and without long-distance water diversion, the culvert renovation period is shorter, and the cost is lower; it has little impact on traffic, the surrounding environment, etc., and weakens social contradictions.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage structures, and particularly to the connection nodes and construction methods of old and new inlet box culverts. Background Art

[0002] In the prior art, the connection between the existing old inlet box culvert and the newly built box culvert has always been a difficult point. The common practice is to temporarily drain the water in the old box culvert through pipelines, then chisel the old box culvert to connect the old and new box culverts. This has caused the following problems:

[0003] 1. Temporary drainage through pipelines requires temporary drainage in the inlet wells at both ends of the box culvert, and the drainage pipeline is long.

[0004] 2. The transformation of the box culvert results in a long temporary drainage period and high costs.

[0005] 3. Temporary drainage operations have impacts on traffic, the surrounding environment, etc., and social contradictions are prominent.

[0006] Therefore, how to solve the problems that water cut-off is required before the connection construction of old and new inlet box culverts and long-distance diversion is also required has become an urgent technical problem for those skilled in the art. Summary of the Invention

[0007] In view of the above-mentioned defects of the prior art, the present invention provides a connection node and a construction method for old and new inlet box culverts, aiming to construct without interrupting the operation of the inlet box culvert and avoid the social impacts brought by long-distance temporary drainage on the ground.

[0008] To achieve the above object, the present invention discloses a connection node for old and new inlet box culverts; it includes an existing old inlet box culvert and at least one newly built new inlet box culvert.

[0009] Wherein, one end of each of the new inlet box culverts is connected to the side wall of the old inlet box culvert, and the end connected to the side wall of the old inlet box culvert includes a permanently used box culvert and a temporary diversion box culvert;

[0010] Each of the permanently used box culverts is located on the extension line of the length direction of the water passage in the corresponding new inlet box culvert, and is connected to the old inlet box culvert to form a corner area;

[0011] The position where each of the temporary diversion box culverts is connected to the corresponding old inlet box culvert is located upstream of the corner area, and when the connection construction between the corresponding permanently used box culvert and the corresponding old inlet box culvert is carried out, it connects the water passages in the corresponding new inlet box culvert and the corresponding old inlet box culvert to conduct water diversion, so that the connection construction between the corresponding permanently used box culvert and the corresponding old inlet box culvert is completed under dry operation conditions.

[0012] Preferably, after the connection construction between the permanent use culvert and the corresponding old inlet culvert is completed, a plugging wall is used to plug between each temporary diversion culvert and the corresponding old inlet culvert.

[0013] The present invention also provides a construction method for the connection node of the new and old inlet culverts, including the following steps:

[0014] Step 1: Construct the new inlet culvert on one side of the old inlet culvert; including a permanent use culvert and a temporary diversion culvert;

[0015] Step 2: During the non-flood season, chisel the retaining wall between the temporary diversion culvert and the old inlet culvert, and then pour the temporary diversion culvert until it is connected to the side wall of the old inlet culvert;

[0016] Chisel a part of the side wall of the old inlet culvert to form a branch hole, and use sandbags to build weirs at the downstream of the branch hole and at the positions where the permanent use culvert and the temporary diversion culvert are connected, so that the water in the old inlet culvert is completely diverted through the temporary diversion culvert to the new inlet culvert

[0017] Step 3: Construct the corner area where the old inlet culvert is connected to the permanent use culvert;

[0018] Step 4: Remove all the sandbag weirs, so that the water in the old inlet culvert enters the permanent use culvert through the corner area;

[0019] Step 5: Use sandbags to build weirs at the positions corresponding to the branch holes in the old inlet culvert and at the positions where the temporary diversion culvert is connected to the permanent use culvert, to intercept the water in the old inlet culvert and prevent the water from entering the temporary diversion culvert;

[0020] Step 6: Repair the chiseled side wall in the old inlet culvert corresponding to the position of the temporary diversion culvert with concrete and steel mesh, and construct a plugging wall in the temporary diversion culvert. After completion, remove the sandbag weirs.

[0021] Preferably, Step 1 includes the following steps:

[0022] First, construct two retaining piles and two water-stop curtains at the positions on both sides corresponding to where the new inlet culvert needs to be built;

[0023] After setting a first foundation pit purlin and a first support for the new inlet culvert between the two retaining piles, excavate the foundation pit until the bottom; after completion, pour the new inlet culvert;

[0024] After pouring the new inlet culvert is completed, construct a temporary retaining wall, and backfill the upper part of the new inlet culvert with soil.

[0025] More preferably, when casting the new water inlet box culvert, expansion joints and water-stopping structures are reserved.

[0026] More preferably, each of the water-stop curtains comprises two rows of high-pressure jet grouting piles arranged along the length direction of the new water inlet box culvert;

[0027] Each of the retaining piles comprises a plurality of bored cast-in-place piles arranged along the length direction of the new water inlet box culvert.

[0028] Preferably, step 3 includes the following steps:

[0029] Step 3.1: Use rotary drilling piles to clear the corner area, and remove the structures at the locations where the interlocking piles need to be set when constructing the corner area;

[0030] Step 3.2: constructing interlocking piles according to the design requirements of the corner area;

[0031] Step 3.3, constructing the second foundation pit purlin and the second support in the corner area;

[0032] Step 3.4: excavate the topsoil to expose the old water inlet culvert corresponding to the corner area, and simultaneously remove the blocking wall and the corresponding first support between the new water inlet culvert and the old water inlet culvert;

[0033] Step 3.5: Chisel away the portion of the old water inlet box culvert corresponding to the corner area, forming a junction surface between the old water inlet box culvert and the corner area;

[0034] Step 3.6, constructing a corner box culvert structure in the corner area;

[0035] Step 3.7: After partially backfilling the covering soil, remove the second support; after the second support is completely removed, backfill the entire covering soil.

[0036] More preferably, in step 3.2, steel casing is used for follow-up construction in the height range corresponding to the corner area.

[0037] More preferably, the joint surfaces between the corner box culvert structure, the old water inlet box culvert and the new water inlet box culvert are all sealed by wrapping water-swelling rubber strips into a ring.

[0038] Beneficial effects of the present invention:

[0039] The application of the present invention makes it possible to construct the connection nodes of the new and old water inlet box culverts without cutting off the water supply or conducting long-distance diversion, shortening the box culvert renovation cycle and saving costs; having little impact on traffic, the surrounding environment, etc., and weakening social contradictions; and when the old box culvert is renovated as a whole in the later stage, it only needs to be connected to the corner box culvert, which is more convenient.

[0040] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the present invention. Description of the Drawings

[0041] Figure 1 Shows a schematic plan view of the structure of the newly constructed water tank culvert and the diversion box culvert in an embodiment of the present invention.

[0042] Figure 2 Shows a schematic cross-sectional view of the permanent use box culvert and the temporary diversion box culvert in the newly constructed water tank culvert in an embodiment of the present invention.

[0043] Figure 3 Shows a schematic cross-sectional view of the temporary diversion box culvert in the newly constructed water tank culvert in an embodiment of the present invention.

[0044] Figure 4 Shows a schematic plan view of the structure of the construction corner box culvert in an embodiment of the present invention.

[0045] Figure 5 Shows a schematic plan view of the structure for plugging the temporary diversion box culvert in an embodiment of the present invention.

[0046] Figure 6 Shows a schematic partial structural section view of using sandbag damming downstream of the branch hole during construction in the corner area in an embodiment of the present invention.

[0047] Figure 7 Shows a schematic elevation view of the local structure of the opening of the completed plugged branch hole in an embodiment of the present invention.

[0048] Figure 8 Shows a schematic plan view of the structure after completion of construction in an embodiment of the present invention. Detailed Description of the Invention

[0049] Embodiment

[0050] As Figure 1 、 Figure 4 、 Figure 5 and Figure 8 shown, the connection node of the new and old water tank culverts; includes the existing old water tank culvert 1 and at least one newly constructed water tank culvert 2.

[0051] Among them, one end of each newly constructed water tank culvert 2 is connected to the side wall of the old water tank culvert 1, and the end connected to the side wall of the old water tank culvert 1 includes a permanent use box culvert 3 and a temporary diversion box culvert 4;

[0052] Each permanent use box culvert 3 is located on the extension line of the length direction of the water passage in the corresponding newly constructed water tank culvert 2, and is connected to the old water tank culvert 1 to form a corner area;

[0053] The position where each temporary diversion culvert 4 is connected to the corresponding old intake culvert 1 is located upstream of the corner area. When the corresponding permanent use culvert 3 is connected to the corresponding old intake culvert 1, the water passageways in the corresponding new intake culvert 2 and the corresponding old intake culvert 1 are connected to conduct water diversion, so that the connection construction between the corresponding permanent use culvert 3 and the corresponding old intake culvert 1 is completed under dry operation conditions.

[0054] Through the temporary diversion culvert 4, when the corresponding permanent use culvert 3 is connected to the corresponding old intake culvert 1, the water passageways in the corresponding new intake culvert 2 and the corresponding old intake culvert 1 are connected to conduct water diversion, so that the connection construction between the corresponding permanent use culvert 3 and the corresponding old intake culvert 1 is completed under dry operation conditions.

[0055] After completion, by blocking the temporary diversion culvert 4, the water flow is allowed to pass through the permanent use culvert 3.

[0056] In some embodiments, after the connection construction between the permanent use culvert 3 and the corresponding old intake culvert 1 is completed, each temporary diversion culvert 4 and the corresponding old intake culvert 1 are blocked by a blocking wall 13.

[0057] Such as Figures 1 to 8 shown, the present invention also provides a construction method for the connection node of the new and old intake culverts, including the following steps:

[0058] Step 1: Construct the new intake culvert 2 on one side of the old intake culvert 1; including the permanent use culvert 3 and the temporary diversion culvert 4;

[0059] Step 2: During the non-flood season, chisel the retaining wall between the temporary diversion culvert 4 and the old intake culvert 1, and then pour the temporary diversion culvert 4 until it is connected to the side wall of the old intake culvert 1;

[0060] Then chisel a part of the side wall of the old intake culvert 1 to form a branch hole 5, and at the downstream of the branch hole 5, as well as the positions where the permanent use culvert 3 and the temporary diversion culvert 4 are connected, sandbag dikes 6 are built to completely divert the water in the old intake culvert 1 through the temporary diversion culvert 4 to the new intake culvert 2

[0061] Step 3: Construct the corner area where the old intake culvert 1 is connected to the permanent use culvert 3;

[0062] Step 4: Remove all the sandbag dikes 6 to allow the water in the old intake culvert 1 to enter the permanent use culvert 3 through the corner area;

[0063] Step 5: At the positions in the old intake culvert 1 corresponding to the branch hole 5, as well as the positions where the temporary diversion culvert 4 is connected to the permanent use culvert 3, sandbag dikes 6 are built to intercept the water in the old intake culvert 1 so that the water does not enter the temporary diversion culvert 4;

[0064] Step 6: Repair the side wall of the old inlet culvert 1 corresponding to the position of the temporary diversion culvert 4 that has been chiseled, using concrete and a steel mesh, and construct a blocking wall 13 inside the temporary diversion culvert 4. After completion, remove the sandbag dike 6.

[0065] In practical applications, a sandbag dike is constructed downstream of the position of the old inlet culvert 1 where the side wall has been chiseled, which can prevent water from overflowing into the construction area when connecting the permanent use culvert 3 and the corresponding old inlet culvert 1, ensuring that the downstream of the position of the chiseled side wall of the old inlet culvert 1 remains dry.

[0066] In some embodiments, Step 1 includes the following steps:

[0067] First, construct two retaining piles 8 and two waterproof curtains 9 on both sides corresponding to the positions where the new inlet culvert 2 needs to be built.

[0068] After setting a first foundation pit purlin 10 and a first support 11 for the new inlet culvert 2 between the two retaining piles 8, excavate the foundation pit until the bottom; after completion, pour the new inlet culvert 2.

[0069] After pouring the new inlet culvert 2, construct a temporary retaining wall 7 and backfill the upper part of the new inlet culvert 2 with soil.

[0070] The temporary retaining wall 7 is used to prevent the soil in the permanent use culvert area from collapsing towards the corner area foundation pit during construction in the corner area.

[0071] In some embodiments, when pouring the new culvert 2, reserve deformation joints 14 and waterproof structures.

[0072] In some embodiments, each waterproof curtain 9 includes two rows of high-pressure jet grouting piles arranged along the length direction of the new inlet culvert 2.

[0073] Each retaining pile 8 includes a plurality of bored cast-in-place piles arranged along the length direction of the new inlet culvert 2.

[0074] In some embodiments, Step 3 includes the following steps:

[0075] Step 3.1: Clear the obstacles in the corner area using a rotary drilling pile, removing the structures existing at the position where the secant pile 18 needs to be set during construction in the corner area.

[0076] Step 3.2: Construct the secant pile 18 according to the design requirements of the corner area.

[0077] Step 3.3: Construct the second foundation pit purlin and the second support in the corner area.

[0078] Step 3.4: Excavate the topsoil to expose the old inlet box culvert 1 corresponding to the corner area. Meanwhile, demolish the blocking wall and the corresponding first support 11 between the newly constructed inlet box culvert 2 and the old inlet box culvert 1.

[0079] Step 3.5: Chisel a part of the old inlet box culvert 1 corresponding to the corner area to form a combined surface 19 of the new and old box culverts at the connection position between the old inlet box culvert 1 and the corner area.

[0080] Step 3.6: Construct the corner box culvert structure 12 in the corner area.

[0081] Step 3.7: After backfilling a part of the soil cover, demolish the second support. After the demolition of the second support is completed, backfill all the soil cover.

[0082] In some embodiments, in Step 3.2, steel casing is used for follow-up construction within the height range corresponding to the corner area.

[0083] In some embodiments, in Step 3.6, the combined surfaces of the corner box culvert structure with the old inlet box culvert 1 and the newly constructed inlet box culvert 2 are sealed by winding water-swelling rubber strips into rings.

[0084] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. Construction method for connection node of old and new inlet box culverts; including existing old inlet box culvert (1) and at least one newly built new inlet box culvert (2); characterized in that, One end of each of the new inlet culverts (2) is connected to the side wall of the old inlet culvert (1), and one end connected to the side wall of the old inlet culvert (1) includes a permanently used culvert (3) and a temporary diversion culvert (4); Each of the permanently used culverts (3) is located on the extension line of the length direction of the water passage in the corresponding new inlet culvert (2), and is connected to the old inlet culvert (1) to form a corner area; The connection position of each of the temporary diversion culverts (4) and the corresponding old inlet culvert (1) is located upstream of the corner area, and when connecting and constructing the corresponding permanently used culvert (3) and the corresponding old inlet culvert (1), the water passages in the corresponding new inlet culvert (2) and the corresponding old inlet culvert (1) are communicated to conduct water diversion, so that the connection construction between the corresponding permanently used culvert (3) and the corresponding old inlet culvert (1) is completed under dry operation conditions; The construction steps are as follows: Step 1: Construct the new inlet culvert (2) on one side of the old inlet culvert (1); Step 2: During the non-flood season, chisel the retaining wall between the temporary diversion culvert (4) and the old inlet culvert (1), and then pour the temporary diversion culvert (4) until it is connected to the side wall of the old inlet culvert (1); Then chisel a part of the side wall of the old inlet culvert (1) to form a branch hole (5), and at the downstream of the branch hole (5), as well as the connection positions of the permanently used culvert (3) and the temporary diversion culvert (4), sandbag dikes (6) are used to completely divert the water in the old inlet culvert (1) to the new inlet culvert (2) through the temporary diversion culvert (4); Step 3: Construct the corner area where the old inlet culvert (1) is connected to the permanently used culvert (3); Step 4: Remove all the sandbag dikes (6) to make the water in the old inlet culvert (1) enter the permanently used culvert (3) through the corner area; Step 5: At the positions corresponding to the branch hole (5) in the old inlet culvert (1) and the connection positions of the temporary diversion culvert (4) and the permanently used culvert (3), sandbag dikes (6) are used to intercept the water in the old inlet culvert (1) so that the water does not enter the temporary diversion culvert (4); Step 6: Repair the chiseled side wall at the position corresponding to the temporary diversion culvert (4) in the old inlet culvert (1) with concrete and steel mesh, and construct a blocking wall (13) in the temporary diversion culvert (4). After completion, remove the sandbag dikes (6).

2. The construction method of the connection node of the new and old inlet culvert according to claim 1, characterized in that, After the connection construction between the permanently used culvert (3) and the corresponding old inlet culvert (1) is completed, each of the temporary diversion culverts (4) and the corresponding old inlet culvert (1) is blocked with a blocking wall (13).

3. The construction method of the connection node of the new and old inlet culvert according to claim 1, characterized in that, Step 1 includes the following steps: First, construct two retaining piles (8) and two water stop curtains (9) at the positions on both sides corresponding to where the new inlet culvert (2) needs to be built; After arranging a first foundation pit purlin (10) and a first support (11) for the newly incoming water tank culvert (2) between the two retaining piles (8), excavate the foundation pit until the bottom; after completion, pour the newly incoming water tank culvert (2). After completing the pouring of the newly incoming water tank culvert (2), construct a temporary retaining wall 7, and backfill the upper part of the newly incoming water tank culvert (2) with soil.

4. The construction method of the connection node of the new and old inlet culvert according to claim 3, characterized in that, When pouring the newly incoming water tank culvert (2), reserve expansion joints (14) and water stop structures.

5. The construction method of the connection node between the new and old inlet culverts according to claim 3, characterized in that, Each water stop curtain (9) includes two rows of high-pressure jet grouting piles arranged along the length direction of the newly incoming water tank culvert (2). Each retaining pile (8) includes a plurality of bored cast-in-place piles arranged along the length direction of the newly incoming water tank culvert (2).

6. The construction method of the connection node of the new and old inlet culvert according to claim 1, characterized in that Step 3 includes the following steps: Step 3.1: Use a rotary drilling pile to clear obstacles in the corner area, and remove the structures existing at the positions where secant piles (18) need to be arranged during the construction of the corner area. Step 3.2: Construct secant piles (18) according to the design requirements of the corner area. Step 3.3: Construct the second foundation pit purlin and the second support in the corner area. Step 3.4: Excavate the surface soil to expose the old incoming water tank culvert (1) corresponding to the corner area, and at the same time remove the sealing wall and the corresponding first support (11) between the newly incoming water tank culvert (2) and the old incoming water tank culvert (1). Step 3.5: Chisel off the part of the old incoming water tank culvert (1) corresponding to the corner area to form a combined surface (19) of the old and new culverts at the connection position between the old incoming water tank culvert (1) and the corner area. Step 3.6: Construct a corner box culvert structure (12) in the corner area. Step 3.7: After backfilling part of the soil, remove the second support; after completing the removal of the second support, backfill all the soil.

7. The construction method of the connection node between the new and old inlet culverts according to claim 6, characterized in that, In Step 3.2, steel casing is used for follow-up construction in the height range corresponding to the corner area.

8. The construction method of the connection node of the new and old inlet culvert according to claim 6, characterized in that, In Step 3.6, the combined surfaces of the corner box culvert structure with the old incoming water tank culvert (1) and the newly incoming water tank culvert (2) are sealed by winding water-swelling rubber strips into a ring.

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