An improved assembled mountain river bank protection structure and construction method thereof

Abstract

The present invention discloses an improved assembled mountain river bank protection structure, comprising: a plurality of front-row pile foundations that are set at intervals along the direction of water flow at the bank of the mountain river; a plurality of rear-row pile foundations that are set at intervals along the direction of water flow at the bank of the mountain river and located at the rear side of the plurality of front-row pile foundations; retaining plate piles that are inserted at the bank of the mountain river and located at the upper rear side of the plurality of front-row pile foundations; a front guide beam that is constructed on the pile tops of the plurality of front-row pile foundations and is respectively connected to each of the front-row pile foundations; a rear guide beam that is constructed on the pile tops of the plurality of rear-row pile foundations and is respectively connected to each of the rear-row pile foundations; and an assembled retaining wall cap that is placed between the front guide beam and the rear guide beam and is supported by the front guide beam and the rear guide beam. A construction method for the above-mentioned improved assembled mountain river bank protection structure is also disclosed. The present invention does not require the construction of a cofferdam in a mountain river, thereby reducing earth excavation in a limited space of the river.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic revetment, and in particular to an improved assembled mountain river channel revetment structure and a construction method thereof. Background Art

[0002] The main problems faced by the comprehensive river management projects in mountainous areas are: 1. The water level in the river varies greatly; 2. The land area of ​​the river is narrow and the construction space is limited; 3. There are often rocky mountains on both sides of the river, which makes it impossible to carry out large-scale earthwork excavation; 4. The water flow in the river is fast, the riverbed is severely eroded, and the riverbed slope is steep. At present, most river bank protection in mountainous areas adopts hydraulic buried stone concrete retaining wall revetment. During the construction process, it is necessary to build cofferdams and cast retaining walls in the mountainous river, which will cause large-scale soil excavation, which is neither ecological nor economical, and also causes great damage to the existing environment on both sides of the mountainous river.

[0003] To this end, the applicant has conducted useful explorations and attempts and found a solution to the above-mentioned problem. The technical solution to be introduced below was produced in this context. Summary of the invention

[0004] One of the technical problems to be solved by the present invention is to provide an improved assembled mountain river bank protection structure which reduces earth excavation, has good ecological and economical properties, and avoids damage to the existing environment on both sides of the mountain river channel in view of the deficiencies of the existing technology.

[0005] The second technical problem to be solved by the present invention is to provide a construction method for the above-mentioned improved assembled mountain river bank protection structure.

[0006] As a first aspect of the present invention, an improved assembled mountain river bank protection structure comprises:

[0007] A number of front-row pile foundations are set at intervals along the direction of water flow on the banks of the mountain river;

[0008] A plurality of rear-row pile foundations are set at intervals along the water flow direction on the bank of a river in a mountainous area and are located behind the plurality of front-row pile foundations;

[0009] Retaining sheet piles inserted at the bank of a river in a mountainous area and located at the upper rear side of the plurality of front-row pile foundations;

[0010] A front guide beam constructed on the tops of the plurality of front-row pile foundations and respectively connected to each of the front-row pile foundations;

[0011] A rear guide beam constructed on the pile tops of the plurality of rear row pile foundations and respectively connected to each of the rear row pile foundations; and

[0012] An assembled retaining wall cap is placed between the front guide beam and the rear guide beam and supported by the front guide beam and the rear guide beam.

[0013] In a preferred embodiment of the present invention, the front row pile foundation and / or the rear row pile foundation are prefabricated square piles or prefabricated PHC pipe piles.

[0014] In a preferred embodiment of the present invention, the plurality of front-row pile foundations are arranged in a semi-plum blossom-shaped spacing, and the spacing between two adjacent front-row pile foundations in a direction perpendicular to the water flow is 200 mm to 600 mm.

[0015] In a preferred embodiment of the present invention, the retaining sheet piles are formed by splicing a plurality of sheet pile units arranged along the water flow direction.

[0016] In a preferred embodiment of the present invention, the retaining sheet piles can be spliced ​​by combining U-shaped sheet pile units with Z-shaped sheet pile units or by combining U-shaped sheet pile units with U-shaped sheet pile units.

[0017] In a preferred embodiment of the present invention, the width of the front guide beam and / or the rear guide beam is 0.8m to 1.2m.

[0018] In a preferred embodiment of the present invention, the assembled retaining wall pedestal is composed of a plurality of prefabricated retaining wall pedestal units assembled along the direction of water flow.

[0019] In a preferred embodiment of the present invention, the prefabricated retaining wall pedestal unit is an L-shaped structure consisting of a pedestal bottom plate portion and a retaining wall body portion prefabricated integrally with the pedestal bottom plate portion.

[0020] In a preferred embodiment of the present invention, at least one steel strand tensioning hole is provided on the pedestal bottom plate portion of the prefabricated retaining wall pedestal unit and / or the retaining wall body portion.

[0021] In a preferred embodiment of the present invention, the length of the prefabricated retaining wall cap unit is 2m to 5m.

[0022] In a preferred embodiment of the present invention, front and rear supporting clamping steps are formed on the inner side surfaces of the front and rear guide beams, and front and rear positioning clamping steps are respectively formed on the front and rear sides of the bottom surface of the assembled retaining wall pedestal; during assembly, the front and rear positioning clamping steps of the assembled retaining wall pedestal are supported on the front and rear supporting clamping steps of the front and rear guide beams.

[0023] In a preferred embodiment of the present invention, a water stop strip is respectively provided between the front supporting clamping step of the front guide beam and the front positioning clamping step of the assembled retaining wall pedestal and / or between the rear supporting clamping step of the rear guide beam and the rear positioning clamping step of the assembled retaining wall pedestal.

[0024] In a preferred embodiment of the present invention, the water stop strip is a water-swellable rubber water stop strip.

[0025] In a preferred embodiment of the present invention, a railing is provided on the top of the assembled retaining wall cap.

[0026] As a second aspect of the present invention, a construction method of the above-mentioned improved assembled mountain river bank protection structure comprises the following steps:

[0027] Step S1, performing bank slope stability calculation, pile foundation bearing capacity and displacement calculation according to the embankment engineering design specification, determining the size of the front and rear pile foundations, the depth of burial and the distance between piles, and the size of the prefabricated retaining wall cap;

[0028] Step S2, determining the size and length of the retaining sheet piles according to the need for bank retaining and pile foundation spacing;

[0029] Step S3, prefabrication in sections is performed in the factory according to the determined sizes of the front row pile foundation and the rear row pile foundation and the size of the assembled retaining wall cap;

[0030] Step S4, the front row pile foundation and the rear row pile foundation are positioned and piled using a pile driving ship;

[0031] Step S5, inserting retaining sheet piles at the rear side of the front row pile foundation;

[0032] Step S6, performing on-site pouring on the tops of the front and rear rows of pile foundations to form front and rear guide beams, and reserving front and rear support clamping steps on the front and rear guide beams;

[0033] Step S7, hoisting the assembled retaining wall cap by hoisting equipment, so that the front and rear positioning clamping steps on the bottom surface of the assembled retaining wall cap correspond to the front and rear supporting clamping steps on the front and rear guide beams respectively;

[0034] Step S8, backfilling the area between the retaining sheet piles, the prefabricated retaining wall cap and the river slope line.

[0035] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0036] 1. The present invention adopts high pile guide beams for construction, and does not need to build cofferdams in mountainous river channels;

[0037] 2. The present invention adopts a cast-in-place guide beam structure combined with an assembled retaining wall cap, which reduces earth excavation in the limited space of the river channel;

[0038] 3. The prefabricated and assembled components of the present invention have the advantages of energy saving and environmental protection, standardized construction, high degree of prefabrication, fast construction speed, reduced on-site workload, and little influence from natural conditions. They have broad application scenarios, and promoting prefabricated concrete assembly construction in the water conservancy field is a general trend. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0040] Figure 1 It is a schematic diagram of the end structure of the improved assembled mountain river bank protection structure of the present invention.

[0041] Figure 2 It is a structural schematic diagram of an embodiment of the present invention in which the front row pile foundation and the retaining sheet pile are coordinated.

[0042] Figure 3 It is a structural schematic diagram of another embodiment of the present invention in which the front row pile foundation and the retaining sheet pile are coordinated. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0044] See also Figure 1 , the figure shows an improved assembled river bank protection structure in mountainous area, including a plurality of front-row pile foundations 100, a plurality of rear-row pile foundations 200, retaining sheet piles 300, a front guide beam 400, a rear guide beam 500 and an assembled retaining wall cap 600.

[0045] Several front-row pile foundations 100 are set at intervals along the water flow direction at the bank of the mountain river. The spacing between two adjacent front-row pile foundations 100 and the spacing perpendicular to the water flow direction can be adjusted according to the structural force and the size of the retaining sheet piles 300. In this embodiment, several front-row pile foundations 100 are arranged in a semi-plum blossom shape, such as Figure 2 and Figure 3 As shown, the distance between two adjacent front-row pile foundations 100 in the direction perpendicular to the water flow is 200 mm to 600 mm. The front-row pile foundations 100 are preferably prefabricated square piles or prefabricated PHC pipe piles.

[0046] A plurality of rear-row pile foundations 200 are set at intervals along the water flow direction at the bank of the mountain river and are located behind a plurality of front-row pile foundations 100. The spacing between the rear-row pile foundations 200 and the front-row pile foundations 100 can be adjusted according to design requirements to determine the width of the assembled retaining wall cap 600. In this embodiment, the rear-row pile foundations 200 preferably use prefabricated square piles or prefabricated PHC pipe piles.

[0047] The retaining sheet pile 300 is inserted at the bank of the mountain river and is located at the upper rear side of a plurality of front-row pile foundations 100. The retaining sheet pile 300 is composed of a plurality of sheet pile units arranged along the water flow direction. Figure 2 The retaining sheet pile 300 can be spliced ​​by combining the U-shaped sheet pile unit 310a and the Z-shaped sheet pile unit 310b. Figure 3 The retaining sheet pile 300 is spliced ​​by combining a U-shaped sheet pile unit 310c and a U-shaped sheet pile unit 310d.

[0048] The front guide beam 400 is constructed on the tops of a plurality of front-row pile foundations 100 and is respectively connected to each of the front-row pile foundations 100 . The width of the front guide beam 400 can be adjusted between 0.8 m and 1.2 m according to design requirements.

[0049] The rear guide beam 500 is constructed on the pile tops of a plurality of rear-row pile foundations 200 and is respectively connected to each rear-row pile foundation 200 . The width of the rear guide beam 500 can be adjusted between 0.8 m and 1.2 m according to design requirements.

[0050] The assembled retaining wall cap 600 is placed between the front guide beam 400 and the rear guide beam 500 and supported by the front guide beam 400 and the rear guide beam 500. Specifically, the assembled retaining wall cap 600 is assembled along the water flow direction by a plurality of prefabricated retaining wall cap units 610, and the length of the prefabricated retaining wall cap unit 610 is 2m to 5m. The prefabricated retaining wall cap unit 610 is an L-shaped structure consisting of a cap bottom plate portion 611 and a retaining wall body portion 612 prefabricated and formed integrally with the cap bottom plate portion 611.

[0051] In order to improve the assembly stability of the prefabricated retaining wall pedestal 600, two steel strand tensioning holes 611a are opened on the pedestal bottom plate part 611 of the prefabricated retaining wall pedestal unit 610, and one steel strand tensioning hole 612a is opened on the retaining wall body part 612 of the prefabricated retaining wall pedestal unit 610; when multiple prefabricated retaining wall pedestal units 610 are put in place, the steel strands are passed through the steel strand tensioning holes 611a on the pedestal bottom plate part 611 of the multiple prefabricated retaining wall pedestal units 610 and tightened, and the steel strands are passed through the steel strand tensioning holes 612a on the retaining wall body part 612 of the multiple prefabricated retaining wall pedestal units 610 and tightened.

[0052] In order to improve the matching degree between the assembled retaining wall pedestal 600 and the front and rear guide beams 400 and 500, front and rear support clamping steps 410 and 510 are formed on the inner side surfaces of the front and rear guide beams 400 and 500, and front and rear positioning clamping steps 601 and 602 are respectively formed on the front and rear sides of the bottom surface of the assembled retaining wall pedestal 600. During assembly, the front and rear positioning clamping steps 601 and 602 of the assembled retaining wall pedestal 600 are supported on the front and rear support clamping steps 410 and 510 of the front and rear guide beams 400 and 500.

[0053] Furthermore, water stop strips 700a and 700b are respectively arranged between the front support clamping step 410 of the front guide beam 400 and the front positioning clamping step 601 of the assembled retaining wall pedestal 600, and between the rear support clamping step 510 of the rear guide beam 500 and the rear positioning clamping step 602 of the assembled retaining wall pedestal 600. In this embodiment, the water stop strips 700a and 700b are preferably water-swellable rubber water stop strips. In this way, the sealing performance between the assembled retaining wall pedestal 600 and the front and rear guide beams 400 and 500 can be improved.

[0054] In addition, a railing 800 is provided on the top of the assembled retaining wall cap 600 .

[0055] The construction method of the improved assembled mountain river bank protection structure of the present invention comprises the following steps:

[0056] Step S1, performing bank slope stability calculation, pile foundation bearing capacity and displacement calculation according to the embankment engineering design specification, determining the size, burial depth and pile spacing of the front row pile foundation 100 and the rear row pile foundation 200 and the size of the assembled retaining wall cap 600;

[0057] Step S2, determining the size and pile length of the retaining sheet pile 300 according to the need for bank protection and pile foundation spacing;

[0058] Step S3, prefabricate in sections in the factory according to the determined sizes of the front row pile foundation 100 and the rear row pile foundation 200 and the size of the assembled retaining wall cap 600;

[0059] Step S4, the front row pile foundation 100 and the rear row pile foundation 200 are positioned and piled using a pile driving ship;

[0060] Step S5, inserting retaining sheet piles 300 at the rear side of the front row pile foundation 100;

[0061] Step S6, performing on-site pouring on the tops of the front and rear rows of pile foundations 100 and 200 to form front and rear guide beams 400 and 500, and reserving front and rear support clamping steps 410 and 510 on the front and rear guide beams 400 and 500;

[0062] Step S7, hoisting the assembled retaining wall pedestal 600 with a hoisting device, so that the front and rear positioning clamping steps 601, 602 on the bottom surface of the assembled retaining wall pedestal 600 correspond to the front and rear supporting clamping steps 410, 510 on the front and rear guide beams 400, 500 respectively;

[0063] Step S8, backfilling the area between the retaining sheet piles 300, the assembled retaining wall cap 600 and the river slope line 1 with soil.

[0064] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An improved assembled mountain river bank protection structure, characterized in that: include: A number of front-row pile foundations are set at intervals along the direction of water flow on the banks of the mountain river; A plurality of rear-row pile foundations are set at intervals along the water flow direction on the bank of a river in a mountainous area and are located behind the plurality of front-row pile foundations; Retaining sheet piles inserted at the bank of a river in a mountainous area and located at the upper rear side of the plurality of front-row pile foundations; A front guide beam constructed on the tops of the plurality of front-row pile foundations and respectively connected to each of the front-row pile foundations; A rear guide beam constructed on the pile tops of the plurality of rear row pile foundations and respectively connected to each of the rear row pile foundations; and An assembled retaining wall cap disposed between the front guide beam and the rear guide beam and supported by the front guide beam and the rear guide beam; The plurality of front-row pile foundations are arranged in a semi-plum blossom-shaped spacing, and the spacing between two adjacent front-row pile foundations in a direction perpendicular to the water flow is 200 mm to 600 mm; The retaining sheet pile is formed by splicing a number of sheet pile units arranged along the water flow direction; The retaining sheet piles can be spliced ​​by combining U-shaped sheet pile units with Z-shaped sheet pile units or by combining U-shaped sheet pile units with U-shaped sheet pile units; Front and rear supporting clamping steps are formed on the inner side surfaces of the front and rear guide beams, and front and rear positioning clamping steps are respectively formed on the front and rear sides of the bottom surface of the assembled retaining wall pedestal; during assembly, the front and rear positioning clamping steps of the assembled retaining wall pedestal are supported on the front and rear supporting clamping steps of the front and rear guide beams; A water stop strip is respectively arranged between the front supporting clamping step of the front guide beam and the front positioning clamping step of the assembled retaining wall pedestal and / or between the rear supporting clamping step of the rear guide beam and the rear positioning clamping step of the assembled retaining wall pedestal.

2. The improved assembled mountain river bank protection structure as claimed in claim 1 is characterized in that: The front row pile foundation and / or the rear row pile foundation adopt prefabricated square piles or prefabricated PHC pipe piles.

3. The improved assembled mountain river bank protection structure as claimed in claim 1 is characterized in that: The width of the front guide beam and / or the rear guide beam is 0.8m to 1.2m.

4. The improved assembled mountain river bank protection structure as claimed in claim 1 is characterized in that: The assembled retaining wall pedestal is formed by assembling a number of prefabricated retaining wall pedestal units along the direction of water flow.

5. The improved assembled mountain river bank protection structure as claimed in claim 4 is characterized in that: The prefabricated retaining wall pedestal unit is an L-shaped structure consisting of a pedestal bottom plate portion and a retaining wall body portion prefabricated integrally with the pedestal bottom plate portion.

6. The improved assembled mountain river bank protection structure as claimed in claim 5 is characterized in that: At least one steel strand tensioning hole is provided on the pedestal bottom plate portion of the prefabricated retaining wall pedestal unit and / or the retaining wall body portion.

7. The improved assembled mountain river bank protection structure as claimed in claim 4 is characterized in that: The length of the prefabricated retaining wall foundation unit is 2m to 5m.

8. The improved assembled mountain river bank protection structure as claimed in claim 7 is characterized in that: The water stop strip is a water-swellable rubber water stop strip.

9. The improved assembled mountain river bank protection structure according to any one of claims 1 to 8, characterized in that: A railing is arranged on the top of the assembled retaining wall cap.

10. A construction method for the improved assembled mountain river bank protection structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, performing bank slope stability calculation, pile foundation bearing capacity and displacement calculation according to the embankment engineering design specification, determining the size of the front and rear pile foundations, the depth of burial and the distance between piles, and the size of the prefabricated retaining wall cap; Step S2, determining the size and length of the retaining sheet piles according to the need for bank retaining and pile foundation spacing; Step S3, prefabrication in sections is performed in the factory according to the determined sizes of the front row pile foundation and the rear row pile foundation and the size of the assembled retaining wall cap; Step S4, the front row pile foundation and the rear row pile foundation are positioned and piled using a pile driving ship; Step S5, inserting retaining sheet piles at the rear side of the front row pile foundation; Step S6, performing on-site pouring on the tops of the front and rear rows of pile foundations to form front and rear guide beams, and reserving front and rear support clamping steps on the front and rear guide beams; Step S7, hoisting the assembled retaining wall cap by hoisting equipment, so that the front and rear positioning clamping steps on the bottom surface of the assembled retaining wall cap correspond to the front and rear supporting clamping steps on the front and rear guide beams respectively; Step S8, backfilling the area between the retaining sheet piles, the prefabricated retaining wall cap and the river slope line.

Images