Construction method for cross transformation of rainwater box culvert and existing sewage pipe

Abstract

The invention relates to a construction method for cross transformation of a rainwater box culvert and an existing sewage pipe, which comprises the following steps: dividing the range of a first construction groove and a second construction groove according to the set positions of the existing sewage pipe and the rainwater box culvert; a first supporting structure is constructed according to the delimited area of the first construction groove, and the first construction groove is excavated; in the first construction groove, diversion construction is conducted on the existing sewage pipe; a second supporting structure is constructed according to the delimited area of the second construction groove, and the second construction groove is excavated; and rainwater box culvert construction is conducted in the second construction groove, and the second construction groove is backfilled after construction is completed. According to the construction method for cross transformation of the rainwater box culvert and the existing sewage pipe, the working procedures of excavation supporting, construction and backfilling are sequentially arranged according to the sequence that the existing sewage pipe is changed firstly and then the box culvert is constructed, the pressure of sewage drainage is reduced, and the influence of engineering construction on road traffic is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of civil engineering, in particular to a construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe. BACKGROUND

[0002] When excavating an existing urban road to construct a rainwater box culvert, the path of the newly constructed box culvert may conflict with that of the existing sewage pipe. In order to ensure that the water passing section of the concrete box culvert is sufficient, the sewage pipe needs to be diverted and reconstructed.

[0003] During the reconstruction construction, if a common trench is constructed, the bottom elevations of the box culvert and the sewage pipe will not be consistent. In order to ensure the stability of the slope, a slope or additional steel sheet piles need to be placed between the construction surfaces of the box culvert and the sewage pipe, resulting in an increase in the excavation width and the amount of steel sheet piles used. Due to the long construction period of the box culvert, the sewage pipe is interrupted during the construction process and cannot bear the task of discharging sewage from urban residents, which has a significant impact on sewage discharge. SUMMARY

[0004] The present application aims to overcome the defects of the prior art and provide a construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe, solving the problem of conflict between the existing rainwater box culvert and the sewage pipe.

[0005] The technical solution to achieve the above-mentioned purpose is: a construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe, comprising: dividing the range of a first construction trench and a second construction trench according to the set positions of the existing sewage pipe and the rainwater box culvert; constructing a first support structure according to the demarcated area of the first construction trench and excavating the first construction trench; diverting and constructing the existing sewage pipe in the first construction trench; constructing a second support structure according to the demarcated area of the second construction trench and excavating the second construction trench; constructing the rainwater box culvert in the second construction trench, and backfilling the second construction trench after the construction is completed.

[0006] In the construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe, the excavation support, construction, and backfilling processes are arranged in sequence according to the order of diverting the existing sewage pipe first and then constructing the box culvert, which reduces the pressure on sewage drainage and reduces the impact of engineering construction on road traffic.

[0007] The sewage pipe is prevented from passing through the drainage box culvert to affect the water passing section of the box culvert, ensuring the drainage function of the box culvert.

[0008] The reconstruction construction of the sewage pipe, which has a short construction period, is completed first, so that the sewage generated by the surrounding residents in production and life can be normally discharged to the sewage treatment plant through the urban sewage pipe network, and then the rainwater box culvert construction, which has a longer construction period, is carried out. Compared with the construction of the box culvert and the sewage pipe in the same trench and at the same time, the impact of the newly constructed box culvert on the sewage discharge of surrounding residents is minimized.

[0009] The construction operation surface and construction procedure are optimized, the excavation width of the foundation pit is reduced, the occupation width of the city road in the construction is reduced, and the influence of the construction process on the road traffic is reduced.

[0010] By optimizing the construction procedure and overall planning the use of the steel sheet pile, the amount of a row of steel sheet piles is reduced, and the construction cost is saved.

[0011] The further improvement of the construction method for the reconstruction of the rainwater box culvert intersecting with the existing sewage pipe lies in that the construction of the first supporting structure according to the demarcated area of the first construction groove and the excavation of the first construction groove include that the first sheet pile and the second sheet pile are punched into the two sides of the demarcated area of the first construction groove respectively, and the first enclosure structure is arranged between the first sheet pile and the second sheet pile.

[0012] The further improvement of the construction method for the reconstruction of the rainwater box culvert intersecting with the existing sewage pipe lies in that the construction of the second supporting structure according to the demarcated area of the second construction groove and the excavation of the second construction groove include that the second sheet pile at the first construction groove is pulled out, the second sheet pile is punched into the outside of the demarcated area of the second construction groove on the other side of the first sheet pile, and the second enclosure structure is arranged between the first sheet pile and the second sheet pile.

[0013] The further improvement of the construction method for the reconstruction of the rainwater box culvert intersecting with the existing sewage pipe lies in that the diversion construction of the existing sewage pipe in the first construction groove includes that a intercepting well is constructed in the first construction groove, the existing sewage pipe is cut off by the intercepting well, and a sewage discharge pipe is arranged outside the intercepting well to drain the sewage in the intercepting well.

[0014] The further improvement of the construction method for the reconstruction of the rainwater box culvert intersecting with the existing sewage pipe lies in that the diversion construction of the existing sewage pipe in the first construction groove includes that a intercepting well is constructed in the first construction groove, the existing sewage pipe is cut off by the intercepting well, and a sewage discharge pipe is arranged outside the intercepting well to drain the sewage in the intercepting well.

[0015] The further improvement of the construction method for the reconstruction of the rainwater box culvert intersecting with the existing sewage pipe lies in that the diversion construction of the existing sewage pipe in the first construction groove further includes that a first backfill layer is constructed in the first construction groove.

[0016] The further improvement of the construction method for the reconstruction of the rainwater box culvert intersecting with the existing sewage pipe lies in that the diversion construction of the existing sewage pipe in the first construction groove further includes that a first backfill layer is constructed in the first construction groove.

[0017] The further improvement of the construction method for cross reconstruction of the rainwater box culvert and the existing sewage pipe is that a surface layer is constructed above the first backfill layer and the second backfill layer.

[0018] The further improvement of the construction method for cross reconstruction of the rainwater box culvert and the existing sewage pipe is that the second supporting structure is removed before the surface layer is constructed above the first backfill layer and the second backfill layer.

[0019] The further improvement of the construction method for cross reconstruction of the rainwater box culvert and the existing sewage pipe is that the rainwater box culvert is constructed in the second construction groove, and the second construction groove is backfilled after the construction is completed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The flowchart of the construction method for cross reconstruction of the rainwater box culvert and the existing sewage pipe is shown.

[0021] Figure 2 The flowchart of step S120 is shown.

[0022] Figure 3 The longitudinal sectional view of the first construction groove is shown.

[0023] Figure 4 The flowchart of step S140 is shown.

[0024] Figure 5 The longitudinal sectional view of the second construction groove is shown.

[0025] Figure 6 The flowchart of step S130 is shown.

[0026] Figure 7 The structural diagram of the rainwater box culvert and the existing sewage pipe is shown.

[0027] Figure 8 The flowchart of step S132 is shown.

[0028] Figure 9 The flowchart of step S130 is shown.

[0029] Figure 10 The structural diagram of the first backfill layer is shown.

[0030] Figure 11 The flowchart of step S150 is shown.

[0031] Figure 12 The structural diagram of the second backfill layer is shown.

[0032] Figure 13 Another flowchart for a construction method of a rainwater box culvert intersecting with an existing sewage pipe according to the present application.

[0033] Figure 14 A structure diagram of a surface layer according to the present application.

[0034] Figure 15 A flowchart before step S160 according to the present application.

[0035] Figure 16 A longitudinal sectional view of the first construction groove and the second construction groove according to the present application.

[0036] Figure 17 Another flowchart of step S150 according to the present application.

[0037] Figure 18 A structure diagram of a rainwater box culvert according to the present application.

[0038] In the figure: 1, an existing sewage pipe; 2, a rainwater box culvert; 3, a first construction groove; 31, a first backfill layer; 4, a second construction groove; 41, a second backfill layer; 5, a first sheet pile; 6, a second sheet pile; 7, a first enclosure structure; 8, a second enclosure structure; 9, a intercepting well; 10, a sewage pipe; 11, a surface layer. DETAILED DESCRIPTION

[0039] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] Reference Figure 1 , a flowchart of a construction method of a rainwater box culvert intersecting with an existing sewage pipe according to the present application is shown. The present application provides a construction method of a rainwater box culvert intersecting with an existing sewage pipe, which comprises:

[0041] Step S110 is performed: according to the set positions of the existing sewage pipe 1 and the rainwater box culvert 2, the ranges of the first construction groove 3 and the second construction groove 4 are divided.

[0042] Among them, the rainwater box culvert 2 is vertically arranged between the existing sewage pipe 1, the first construction groove 3 corresponds to the position of the existing sewage pipe 1, which is convenient for subsequent reconstruction of the existing sewage pipe 1, the second construction groove 4 corresponds to the position of the rainwater box culvert 2, which is convenient for subsequent construction of the rainwater box culvert 2, the first construction groove 3 and the second construction groove 4 are arranged adjacent to each other, the sizes of the first construction groove 3 and the second construction groove 4 are set according to the actual construction requirements, which are not specifically limited here, and then step S120 is performed.

[0043] Step S120 is performed: according to the demarcated area of the first construction groove 3, the first support structure is constructed, and the first construction groove 3 is excavated.

[0044] The existing sewage pipe 1 is exposed by excavating the first construction slot 3, the depth of the first construction slot 3 is set according to the arrangement of the existing sewage pipe 1, and the specific construction steps of the first supporting structure are described below, and the step S130 is performed.

[0045] The step S130 is performed: The existing sewage pipe 1 is diverted in the first construction slot 3.

[0046] The existing sewage pipe 1 bypasses the setting area of the rainwater box culvert 2 after being diverted, and then the step S140 is performed.

[0047] The step S140 is performed: The second supporting structure is constructed according to the demarcated area of the second construction slot 4, and the second construction slot 4 is excavated.

[0048] The second construction slot 4 is arranged adjacent to the second construction slot 4 but is not connected, and the specific construction steps of the second supporting structure are described below, and the step S150 is performed.

[0049] The step S150 is performed: The rainwater box culvert 2 is constructed in the second construction slot 4, and the second construction slot 4 is backfilled after the construction is completed.

[0050] The specific steps of the box culvert construction are described below, and the step S150 is performed.

[0051] Referring to Figure 2 and Figure 3 , Figure 2 The flowchart of the step S120 of the present application is shown, Figure 3 The longitudinal section view of the first construction slot of the present application is shown. The present application provides a construction method for the cross reconstruction of a rainwater box culvert and an existing sewage pipe, and the step S120 comprises:

[0052] The step S121 is performed: The first sheet pile 5 and the second sheet pile 6 are respectively driven on both sides of the demarcated area of the first construction slot 3.

[0053] The size of the first sheet pile 5 and the second sheet pile 6 is set to be consistent, and the first sheet pile 5 and the second sheet pile 6 are oppositely arranged, the top of the first sheet pile 5 and the second sheet pile 6 is higher than the set slot, and the bottom extends below the slot bottom, which can maintain the stability of the surrounding soil of the first construction slot 3, and then the step S122 is performed.

[0054] The step S122 is performed: The first enclosure structure 7 is arranged between the first sheet pile 5 and the second sheet pile 6.

[0055] The first enclosure structure 7 is horizontally arranged between the first sheet pile 5 and the second sheet pile 6, the first enclosure structure 7 is arranged close to the slot of the first construction slot 3, and the first enclosure structure 7 comprises a surrounding purlin structure and a supporting structure.

[0056] Referring to Figure 4 and Figure 5 , Figure 4 shows the flowchart of step S140 of the present application, Figure 5 shows the longitudinal section view of the second construction slot of the present application. The present application provides a construction method for the cross reconstruction of the rainwater box culvert and the existing sewage pipe, and step S140 comprises:

[0057] Step S141 is performed: the second sheet pile 6 at the first construction slot 3 is pulled out.

[0058] Before the second sheet pile 6 is pulled out, the first construction slot 3 needs to be backfilled to prevent soil collapse. The second sheet pile 6 is arranged away from the second construction slot 4, and then step S142 is performed.

[0059] Step S142 is performed: the second sheet pile 6 is driven into the outside of the area demarcated by the second construction slot 4 on the other side of the first sheet pile 5.

[0060] The second sheet pile 6 is recycled, which realizes the support work of the rainwater box culvert 2 construction and the existing sewage pipe 1 reconstruction in two construction slots with only one set (i.e. two) of sheet piles, reducing the construction cost. The first sheet pile 5 remains in its original state, and the second sheet pile 6 is re-driven and still arranged relatively to the first sheet pile 5, and then step S143 is performed.

[0061] Step S143 is performed: the second enclosure structure 8 is arranged between the first sheet pile 5 and the second sheet pile 6.

[0062] The second construction slot 4 is excavated according to the principles of slot support, supporting before digging, layered excavation, and strictly prohibiting overexcavation.

[0063] Referring to Figure 6 and Figure 7 , Figure 6 shows the flowchart of step S130 of the present application, Figure 7 shows the structural schematic diagram of the rainwater box culvert and the existing sewage pipe of the present application. The present application provides a construction method for the cross reconstruction of the rainwater box culvert and the existing sewage pipe, and step S130 comprises:

[0064] Step S131 is performed: the intercepting well 9 is constructed in the first construction slot 3 to cut off the existing sewage pipe 1 with the intercepting well 9.

[0065] The position of the intercepting well 9 is arranged according to the direction of the existing sewage pipe 1, the intercepting well 9 is vertically arranged between the existing sewage pipe 1 and the rainwater box culvert 2, the intercepting well 9 is in communication with the existing sewage pipe 1, which facilitates the flow of sewage in the existing sewage pipe 1 into the intercepting well 9, and reduces the impact on sewage discharge during construction.

[0066] In the embodiment, multiple existing sewage pipes 1 are arranged underground, and one intercepting well 9 is arranged corresponding to each existing sewage pipe 1, and the intercepting wells 9 are arranged in parallel with each other, and then step S132 is performed.

[0067] Step S132 is performed: a sewage pipe 10 is arranged outside the intercepting well 9 to drain the sewage in the intercepting well 9.

[0068] The arrangement of the sewage pipe 10 is set according to actual construction requirements, and is not specifically limited here.

[0069] Referring to Figure 8 , a flowchart of step S132 of the present application is shown. The present application provides a construction method for cross-reconstruction of a rainwater box culvert and an existing sewage pipe, and step S132 includes:

[0070] Step S1321 is performed: the adjacent intercepting wells 9 are connected through the sewage pipe 10.

[0071] The sewage in the intercepting well 9 is drained through the sewage pipe 10.

[0072] Referring to Figure 9 and Figure 10 , Figure 9 another flowchart of step S130 of the present application is shown, Figure 10 a structural diagram of the first backfill layer of the present application is shown. The present application provides a construction method for cross-reconstruction of a rainwater box culvert and an existing sewage pipe, and step S130 further includes:

[0073] Step S133 is performed: the first backfill layer 31 is constructed in the first construction trench 3.

[0074] The first backfill layer 31 is backfilled in layers in the first construction trench 3, which can be symmetrically compacted to fill the top surface of the first backfill layer 31 to be flush with the top surface of the roadbed. When the uppermost layer is backfilled, the first enclosure structure 7 is removed and recycled.

[0075] In the embodiment, after the reconstruction and construction of the existing sewage pipe 1 are completed, the bottom of the foundation pit needs to be cleaned, and accumulated water, sundries and other materials that are not conducive to backfilling need to be removed, and concealed engineering acceptance needs to be performed. After the acceptance is passed, backfilling is performed, and the compaction degree of each layer of backfilling soil needs to be inspected during the construction process.

[0076] In the embodiment, the first construction trench 3 has been backfilled and can be used as a temporary road for construction personnel to walk or small machinery to pass through, which also reduces the traffic pressure in municipal road excavation construction.

[0077] Referring to Figure 11 and Figure 12 , Figure 11 a flowchart of step S150 of the present application is shown, Figure 12The structural schematic diagram of the second backfill layer of the present application is shown. The present application provides a construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe, and step S150 comprises:

[0078] Step S151 is performed: constructing a second backfill layer 41 in the second construction trench 4.

[0079] The backfill construction of the second backfill layer 41 is the same as the layered backfill method of the first backfill layer 31. When the layered backfill of the second backfill layer 41 reaches the uppermost layer, the second enclosure structure 8 is removed and recycled. The top of the second backfill layer 41 is also filled to a position flush with the top surface of the roadbed. The top of the second backfill layer 41 is flush with the top of the first backfill layer 31, which can serve as a temporary road for construction personnel to walk on or for small machinery to pass through, thereby improving construction efficiency.

[0080] Referring to Figure 13 and Figure 14 , Figure 13 Another flowchart of the construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe of the present application is shown, Figure 14 The structural schematic diagram of the surface layer of the present application is shown. The present application provides a construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe, which further comprises:

[0081] Step S160 is performed: constructing a surface layer 11 above the first backfill layer 31 and the second backfill layer 41.

[0082] The surface layer 11 is connected to the original road surface of the excavation area.

[0083] In this embodiment, the roadbed at the excavation of the first construction trench 3 and the second construction trench 4 needs to be repaired, compacted, and cleaned before the construction of the surface layer 11. After the construction of the surface layer 11, the damaged road surface caused by excavation can be repaired to restore road traffic.

[0084] Referring to Figure 15 and Figure 16 , Figure 15 The flowchart before step S160 of the present application is shown, Figure 16 The longitudinal sectional view of the first construction trench and the second construction trench of the present application is shown. The present application provides a construction method for cross reconstruction of a rainwater box culvert and an existing sewage pipe, which comprises, before step S160:

[0085] Step S1601 is performed: removing the second support structure.

[0086] Before the construction of the surface layer 11, the first sheet pile 5 and the second sheet pile 6 need to be removed.

[0087] Referring to Figure 17 and Figure 18 , Figure 17 Another flowchart of step S150 of the present application is shown,Figure 18 A structural schematic diagram of the rainwater box culvert of the present application is shown. The present application provides a construction method for cross-reconstruction of a rainwater box culvert and an existing sewage pipe, and step S150 further comprises:

[0088] Step S1501 is performed: according to the construction sequence of binding steel bars, installing a formwork, and pouring concrete, the rainwater box culvert 2 is poured.

[0089] The concrete of the rainwater box culvert 2 is cured to reach the design strength, and after various detections and acceptance, the construction at the rainwater box culvert 2 is completed.

[0090] The present application is described in detail above in combination with the embodiments of the drawings, and those of ordinary skill in the art can make various changes to the present application according to the above description. Therefore, certain details in the embodiments should not constitute a limitation on the present application, and the scope of protection of the present application will be defined by the appended claims.

Claims

1. A construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe, characterized in that: include: Divide the scope of the first construction trench and the second construction trench according to the setting position of the existing sewage pipe and rainwater box culvert; constructing a first supporting structure according to the demarcated area of ​​the first construction trench and excavating the first construction trench; In the first construction trench, diverting the existing sewage pipe; constructing a second supporting structure according to the demarcated area of ​​the second construction trench and excavating the second construction trench; The rainwater box culvert is constructed in the second construction trench, and the second construction trench is backfilled after the construction is completed.

2. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 1 is characterized in that: The step of constructing the first supporting structure according to the demarcated area of ​​the first construction trench and excavating the first construction trench includes: driving a first sheet pile and a second sheet pile into both sides of the demarcated area of ​​the first construction trench; A first retaining structure is provided between the first sheet piles and the second sheet piles.

3. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 2 is characterized in that: The step of constructing the second supporting structure according to the demarcated area of ​​the second construction trench and excavating the second construction trench includes: pulling out the second sheet pile at the first construction trench; On the other side of the first sheet pile, driving the second sheet pile into the outside of the area defined by the second construction trench; A second retaining structure is provided between the first sheet piles and the second sheet piles.

4. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 1 is characterized in that: The diversion construction of the existing sewage pipe in the first construction trench includes: constructing an interception well in the first construction trench, and using the interception well to cut off the existing sewage pipe; A sewage pipe is arranged outside the intercepting well to drain the sewage in the intercepting well.

5. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 4 is characterized in that: The method of disposing a sewage pipe outside the interception well to drain the sewage in the interception well comprises: The adjacent intercepting wells are connected via the sewage pipe.

6. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 4 is characterized in that: The diversion construction of the existing sewage pipe in the first construction trench further includes: A first backfill layer is constructed in the first construction trench.

7. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 6 is characterized in that: The step of constructing the rainwater box culvert in the second construction trench and backfilling the second construction trench after the construction is completed comprises: Construct a second backfill layer in the second construction trench.

8. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 7 is characterized in that: Also includes: A surface layer is constructed above the first backfill layer and the second backfill layer.

9. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 8 is characterized in that: The method of constructing the surface layer above the first backfill layer and the second backfill layer includes: The second supporting structure is removed.

10. The construction method for reconstructing the intersection of a rainwater box culvert and an existing sewage pipe according to claim 1 is characterized in that: The step of constructing the rainwater box culvert in the second construction trench and backfilling the second construction trench after the construction is completed further comprises: The rainwater box culvert is cast in the construction sequence of tying steel bars, installing formwork, and pouring concrete.

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