Construction method of row pile connecting beam cantilever consolidation steel sheet pile composite retaining system

Abstract

The invention discloses a construction method of a row pile connecting beam cantilever consolidation steel sheet pile composite retaining system, which comprises the steps of S1, row pile construction, S2, upstream face pipe pile construction, S3, concrete beam pouring, S4, steel sheet pile construction, S5, ramp panel installation and the like, so that the whole construction process of the row pile connecting beam cantilever consolidation steel sheet pile composite retaining system is completed. According to the construction method of the row pile connecting beam cantilever consolidation steel sheet pile composite supporting and retaining system, supporting and protection of a launching ramp can be achieved, cofferdam drainage construction is not needed, the engineering amount, the construction period and the construction cost of whole structure construction are greatly reduced, the structure is stable, and reliability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and specifically relates to a construction method for a composite retaining system of row piles, connecting beams, cantilevered consolidated steel sheet piles. Background Technique

[0002] Facilities such as small ships often enter the water or land through a launching ramp. Compared with the method of using a shipyard or a ship hoist to assist the ship in entering the water or landing, the launching ramp does not require the aid of large equipment, and uses the buoyancy of water to launch or land the ship, saving costs, conserving energy, and being economical and environmentally friendly. Therefore, the launching ramp needs to extend below the lowest water level of the water area where the ship launches or lands to ensure that the ship can launch or land through the launching ramp under any water level conditions.

[0003] Currently, for the construction of the retaining system of traditional launching ramps, generally, cofferdams are first drained, and then solid concrete or concrete frames are poured for construction. Its construction workload is very large, the cycle is long, and the cost is high. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for a composite retaining system of row piles, connecting beams, cantilevered consolidated steel sheet piles to solve the above defects.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A construction method for a composite retaining system of row piles, connecting beams, cantilevered consolidated steel sheet piles includes the following steps:

[0007] S1. Construction of row piles:

[0008] According to the design drawings, a number of prestressed pipe piles evenly distributed at equal distances horizontally and vertically are successively penetrated into the shore and the water area of the water area; from the shore of the water area to the water area, the heights of the prestressed pipe piles evenly distributed at equal distances gradually decrease;

[0009] S2. Construction of the water-facing pipe piles:

[0010] At a certain distance from the outermost prestressed pipe piles in the water area, two rows of water-facing pipe piles arranged longitudinally are installed and successively penetrated into the water body, the soil layer, and the soil bearing layer in the water area;

[0011] S3. Pouring of the concrete beam:

[0012] Formworks are installed at the tops of a number of prestressed pipe piles evenly distributed at equal distances horizontally and vertically and at the tops of the two rows of water-facing pipe piles, and then the steel bars are tied and the concrete is poured. A longitudinal beam and a cross beam in an inclined grid-like structure are constructed at the tops of the number of prestressed pipe piles, and a connecting beam is constructed at the tops of the two rows of water-facing pipe piles;

[0013] S4. Construction of the steel sheet piles:

[0014] When the cross beam is poured, a steel sheet pile guide groove is reserved at its top. The steel sheet piles are penetrated from top to bottom through the steel sheet pile guide groove and successively penetrated into the water body, soil layer and soil bearing layer in the water area, so that the top of the steel sheet pile does not protrude from the top surface of the cross beam. Then, after pouring the pile top into the gap between the upper end of the steel sheet pile and the inner wall of the steel sheet pile guide groove, concrete is poured.

[0015] S5. Installation of ramp panel:

[0016] Install the ramp panel on the longitudinal beams and cross beams that form an inclined grid-like structure, and make the ramp panel closely adhere to the outer wall of the cross beam. Moreover, the lower position of the ramp panel is flush with the top surface of the cross beam, thus completing the entire construction process of the row pile connected cross beam cantilever consolidated steel sheet pile composite retaining system.

[0017] Preferably, in step S1, the prestressed pipe piles located on the shore of the water area are directly penetrated into the soil bearing layer on the shore of the water area, while the prestressed pipe piles located in the water area are successively penetrated into the water body, soil layer and soil bearing layer in the water area.

[0018] Preferably, in step S3, several parallel longitudinal beams are respectively arranged on the longitudinal prestressed pipe piles, and several parallel cross beams are respectively arranged on the transverse prestressed pipe piles; in steps S3 and S5, several longitudinal beams, several cross beams and the ramp panel form an inclined launching ramp.

[0019] Preferably, in step S4, the liquid level height of the water body is variable, divided into a low water level line and a normal water level line. The cross beam is located above the low water level line and the top surface of the cross beam is not lower than the normal water level line.

[0020] Preferably, in step S4, the steel sheet piles are composed of several Larsen steel sheet piles connected in series through the lock joints to form a plate-like structure.

[0021] Preferably, in step S4, before the steel sheet piles are penetrated from the steel sheet pile guide groove, one or more water-facing pipe piles in two rows of water-facing pipe piles are respectively installed with steel sheet pile limiting devices, and the steel sheet pile limiting devices are located on one side of the steel sheet piles; then the steel sheet piles are penetrated into the water body, soil layer and soil bearing layer in the water area under the limiting action of the steel sheet pile limiting devices.

[0022] Preferably, the steel sheet pile limiting device comprises a base floor plate, a limiting baffle plate, a first limiting spring assembly, a roller and a second limiting spring assembly. The base floor plate is fixed on the water-facing pipe pile by U-shaped bolts. The limiting baffle plate is hinged to the front side end surface of the base floor plate in an inclined shape, and the first limiting spring assembly is installed between the limiting baffle plate and the front side end surface of the base floor plate. The second limiting spring assembly is horizontally arranged below the limiting baffle plate, and the roller is installed at the front end of the second limiting spring assembly. The rear end of the second limiting spring assembly is fixed on the front side end surface of the base floor plate by a pressure sensor.

[0023] Preferably, the steel sheet pile limiting device further comprises a limiting component housing and a limiting rod. The limiting component housing comprises two side panels, a bottom plate, an upper end plate and a front end plate. The two side panels are both fixed on the front side end surface of the base floor plate. The bottom plate is installed between the bottoms of the two side panels. The upper end plate is installed between the tops of the two side panels. The limiting baffle plate, the first limiting spring assembly and the second limiting spring assembly are all installed on the front side end surface of the base floor plate inside the limiting component housing, and the lower end of the limiting baffle plate is suspended outside the limiting component housing. The limiting rod is installed below the limiting baffle plate and fixed between the two side panels. The front end plate is installed between the front ends of the two side panels between the limiting rod and the second limiting spring assembly. The front end of the second limiting spring assembly and the roller are suspended outside the limiting component housing.

[0024] Preferably, both the first limiting spring assembly and the second limiting spring assembly are composed of an inner telescopic rod, an outer sleeve and a telescopic spring. The rear end of the inner telescopic rod is inserted into the front end of the outer sleeve. The telescopic spring is sleeved outside the inner telescopic rod and the outer sleeve, and its two ends are respectively fixed on the outer walls of the inner telescopic rod and the outer sleeve. The front end of the inner telescopic rod and the rear end of the outer sleeve of the first limiting spring assembly are respectively hinged to the limiting baffle plate and the base floor plate. The roller is installed at the front end of the inner telescopic rod of the second limiting spring assembly. The rear end of the outer sleeve of the second limiting spring assembly is fixed on the front side end surface of the base floor plate by a pressure sensor.

[0025] Preferably, U-shaped bolt holes are provided on the base floor plate. The front end of the U-shaped bolt penetrates through the U-shaped bolt hole. Fixed nuts and fixed pads are arranged on the U-shaped bolts on the front and rear sides of the base floor plate. The position of the base floor plate on the U-shaped bolt is fixed and locked by the fixed nuts and fixed pads on the front and rear sides. A pipe pile limiting plate, a fixed nut and a fixed pad are also arranged on the U-shaped bolt at the rear side of the base floor plate. The U-shaped bolt and the pipe pile limiting plate can limit and fix the water-facing pipe pile and are fixed and locked by the fixed nut and the fixed pad.

[0026] The beneficial effects of the present invention are as follows:

[0027] Construction method of composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles. The method constructs row piles by arranging a number of prestressed pipe piles 1 at equal distances horizontally and vertically. The two rows of water-facing pipe piles 3 arranged longitudinally provide support for the connecting beam 4 and the steel sheet pile 5. By pouring longitudinal beams 21 and cross beams 22 at the top of the prestressed pipe piles 1 and installing ramp panels 23, and pouring a connecting beam 4 at the top of the two rows of water-facing pipe piles 3 and using the steel sheet piles 5 between the two rows of water-facing pipe piles 3 to retain water, a composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles is constructed. The invention can support and protect the launching ramp, eliminating the need for cofferdam drainage construction, greatly reducing the construction quantity, construction period and construction cost of the entire structure, with a stable structure and good reliability. Description of the Drawings

[0028] Figure 1 : Flow chart of the present invention;

[0029] Figure 2 : Structural schematic diagram of the composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles of the present invention;

[0030] Figure 3 : Left view of the installation structure of the composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles of the present invention;

[0031] Figure 4 : Schematic diagram of the connection structure of the water-facing pipe piles, connecting beams, steel sheet piles and steel sheet pile limiting devices of the composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles of the present invention;

[0032] Figure 5 : Left view of the structure of the steel sheet pile limiting device of the composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles of the present invention;

[0033] Figure 6 : Front view of the structure of the steel sheet pile limiting device of the composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles in Embodiment 2 of the present invention;

[0034] Figure 7 : Front view of the structure of the steel sheet pile limiting device of the composite retaining system of row piles, connecting beams, cantilever fixed steel sheet piles in Embodiment 3 of the present invention. Detailed Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0036] Embodiment 1:

[0037] Combined with the attached Figures 1-3 , the specific implementation manners of the present invention are described as follows:

[0038] As Figures 1-3 shown, a construction method for a composite retaining system of row piles, connecting beams, cantilevered fixed steel sheet piles includes the following steps:

[0039] S1. Row pile construction:

[0040] According to the design drawings, a number of prestressed pipe piles 1 evenly distributed at equal distances horizontally and vertically are successively driven into the water bank and the water area; from the water bank to the water area, the heights of the evenly distributed prestressed pipe piles 1 gradually decrease.

[0041] S2. Construction of the water-facing pipe piles:

[0042] At a certain distance from the outermost prestressed pipe pile 1 in the water area, two rows of water-facing pipe piles 3 arranged longitudinally are installed and successively driven into the water body 300, the soil layer 200 and the soil bearing layer 100 in the water area.

[0043] S3. Casting of the concrete beam:

[0044] Formworks are installed at the tops of a number of prestressed pipe piles 1 evenly distributed horizontally and vertically and at the tops of two rows of water-facing pipe piles 3. Then, steel bars are tied and concrete is cast. A longitudinal beam 21 and a cross beam 22 in an inclined grid-like structure are constructed at the tops of a number of prestressed pipe piles 1, and a connecting beam 4 is constructed at the tops of two rows of water-facing pipe piles 3.

[0045] S4. Steel sheet pile construction:

[0046] When casting the connecting beam 4, a steel sheet pile guide groove 42 is reserved at its top. The steel sheet pile 5 is driven into the water body 300, the soil layer 200 and the soil bearing layer 100 in the water area from top to bottom through the steel sheet pile guide groove 42, so that the top of the steel sheet pile 5 does not protrude from the top surface of the connecting beam 4; then, concrete 43 is cast in the gap between the upper end of the steel sheet pile 5 and the inner wall of the steel sheet pile guide groove 42 after casting the pile top.

[0047] S5. Installation of the ramp panel:

[0048] The ramp panel 23 is installed on the longitudinal beam 21 and the cross beam 22 in an inclined grid-like structure, and the ramp panel 23 is closely attached to the outer wall of the connecting beam 4, and the lower position of the ramp panel 23 is flush with the top surface of the connecting beam 4, thus completing the entire construction process of the composite retaining system of row piles, connecting beams, cantilevered fixed steel sheet piles.

[0049] Embodiment 2:

[0050] Combined with the attached Figures 1-6 , the specific implementation manners of the present invention are described as follows:

[0051] As Figures 1-6As shown in the figure, a construction method for a composite retaining system of row piles, tie beams, cantilever fixed steel sheet piles includes the following steps:

[0052] S1. Row pile construction:

[0053] According to the design drawings, a number of prestressed pipe piles 1 evenly distributed at equal distances horizontally and vertically are successively driven into the water area shore and the water area. The heights of the evenly arranged prestressed pipe piles 1 are not completely the same. From the water area shore to the water area, the heights of the prestressed pipe piles 1 gradually decrease.

[0054] Among them, the prestressed pipe piles 1 located on the water area shore are directly driven into the soil bearing layer 100 of the water area shore, while the prestressed pipe piles 1 located in the water area are successively driven into the water body 300, the soil layer 200 and the soil bearing layer 100 in the water area.

[0055] S2. Construction of water-facing pipe piles:

[0056] At a certain distance from the outermost prestressed pipe piles 1 in the water area, two rows of water-facing pipe piles 3 arranged longitudinally are installed and successively driven into the water body 300, the soil layer 200 and the soil bearing layer 100 in the water area.

[0057] A number of water-facing pipe piles 3 are provided and evenly distributed at equal distances in two longitudinal rows. The water-facing pipe piles 3 are arranged in a dense pattern. The distance between two adjacent water-facing pipe piles 3 in each longitudinal row of water-facing pipe piles 3 is less than the distance between two adjacent prestressed pipe piles 1, which can provide greater supporting force and protection force and better stability.

[0058] S3. Concrete beam pouring:

[0059] A number of prestressed pipe piles 1 are densely arranged at equal distances horizontally and vertically. Forms are installed at the tops of the prestressed pipe piles 1 evenly distributed at equal distances horizontally and vertically, then steel bars are tied and concrete is poured to construct longitudinal beams 21 and cross beams 22 in an inclined grid-like structure. A number of cross beams 22 are provided and are parallel to each other and are respectively arranged on the horizontal prestressed pipe piles 1. A number of longitudinal beams 21 and cross beams 22 form an inclined grid-like structure.

[0060] Forms are installed at the tops of the two rows of water-facing pipe piles 3, then steel bars are tied and concrete is poured to construct a tie beam 4, that is, the tie beam 4 is arranged at the tops of the two longitudinal rows of water-facing pipe piles 3 and is formed by pouring concrete. The tie beam 4 includes a tie beam body 41, and a longitudinal steel sheet pile guide groove 42 is reserved in the center of the top of the tie beam body 41 during pouring.

[0061] The liquid level height of the water body 300 is variable, which is divided into a low water level line 301 and a normal water level line 302. The cross beam 4 is located above the low water level line 301 and the top surface of the cross beam 4 is not lower than the normal water level line 302, which can ensure that the cross beam 4 is exposed above the water surface for a long time.

[0062] S4. Steel sheet pile construction:

[0063] S41. Install one or more steel sheet pile limiting devices 6 on both columns of the water-facing pipe piles 3, and make the steel sheet pile limiting devices 6 located on one side of the pre-installed steel sheet piles 5.

[0064] Among them, the steel sheet pile limiting device 6 includes a base bottom plate 61, a limiting component housing 62, a limiting baffle 63, a first limiting spring component 64, a limiting rod 65, a roller 66 and a second limiting spring component 67.

[0065] The base bottom plate 61 is fixed on the water-facing pipe pile 3 by two upper and lower U-shaped bolts 69. Specifically: U-shaped bolt holes are provided on the base bottom plate 61. The rear end of the U-shaped bolt 69 is sleeved on the water-facing pipe pile 3, and its front end penetrates through the U-shaped bolt hole; fixing nuts 692 and fixing pads 693 are provided on the U-shaped bolts 69 on the front and rear sides of the base bottom plate 61. A pipe pile limiting plate 691, a fixing nut 692 and a fixing pad 693 are also provided on the U-shaped bolt 69 on the rear side of the base bottom plate 61. That is, a set of fixing nut 692 and fixing pad 693 are provided on the U-shaped bolt 69 on the front side of the base bottom plate 61, and a pipe pile limiting plate 691 and two sets of fixing nuts 692 and fixing pads 693 are installed on the U-shaped bolt 69 on the rear side of the base bottom plate 61. Through the pipe pile limiting plate 691 and the adjacent set of fixing nut 692 and fixing pad 693, the rear end of the U-shaped bolt 69 can be sleeved on the water-facing pipe pile 3 for fixing and locking. Through the two sets of fixing nuts 692 and fixing pads 693 on the front and rear of the base bottom plate 61 on the U-shaped bolt 69, the position of the base bottom plate 61 on the U-shaped bolt 69 can be adjusted and fixed and locked. Through the position adjustment of the base bottom plate 61 on the two upper and lower U-shaped bolts 69, the vertical state of the base bottom plate 61 can be finely adjusted to avoid the situation that the base bottom plate 61 is also inclined due to a certain inclination of the water-facing pipe pile 3.

[0066] The limiting component housing 62 includes two side panels 621, a bottom plate 622, an upper end plate 623 and a front end plate 624. The two side panels 621 are both fixed on the front end surface of the base bottom plate 61. The bottom plate 622 is installed between the bottoms of the two side panels 621. The upper end plate 623 is installed between the tops of the two side panels 621. The front end plate 624 is installed between the fronts of the two side panels 621. That is, two holes are provided on the front end surface of the limiting component housing 62, which are respectively located between the upper end plate 623 and the front end plate 624, and between the front end plate 624 and the bottom plate 622.

[0067] The limit baffle 63 is hinged to the front side end surface of the base bottom plate 61 in an inclined shape with the front lower and the rear higher. That is, the rear end of the limit baffle 63 is hinged to the front side end surface of the base bottom plate 61 inside the limit component housing 62, and the front end of the limit baffle 63 penetrates through the hole left on the front side end surface of the limit component housing 62 located between the upper end plate 623 and the front end plate 624 and is suspended outside the limit component housing 62. The first limit spring assembly 64 is installed between the limit baffle 63 and the front side end surface of the base bottom plate 61, and the limit rod 65 is installed below the limit baffle 63 and fixed between the two side plates 621.

[0068] The second limit spring assembly 67 is horizontally arranged below the limit baffle 63, and the front end of the second limit spring assembly 67 penetrates through the hole left on the front side end surface of the limit component housing 62 between the front end plate 624 and the bottom plate 622 and is suspended outside the limit component housing 62. The roller 66 is installed at the front end of the second limit spring assembly 67, and the rear end of the second limit spring assembly 67 is fixed to the front side end surface of the base bottom plate 61 inside the limit component housing 62 through the pressure sensor 68.

[0069] Both the first limit spring assembly 64 and the second limit spring assembly 67 are composed of an inner telescopic rod, an outer sleeve tube and a telescopic spring. The rear end of the inner telescopic rod is inserted into the front end of the outer sleeve tube, the telescopic spring is sleeved outside the inner telescopic rod and the outer sleeve tube, and its two ends are respectively fixed on the outer walls of the inner telescopic rod and the outer sleeve tube; the front end of the inner telescopic rod and the rear end of the outer sleeve tube of the first limit spring assembly 64 are respectively hinged to the limit baffle 63 and the base bottom plate 61, the roller 66 is installed at the front end of the inner telescopic rod of the second limit spring assembly 67, and the rear end of the outer sleeve tube of the second limit spring assembly 67 is fixed to the front side end surface of the base bottom plate 61 through the pressure sensor 68.

[0070] During the installation process of the steel sheet pile limiting device 6, the specific steps are as follows:

[0071] (1) Determine that a plurality of Larssen steel sheet piles are connected in series through the locking mouths to form a plate-shaped steel sheet pile 5, and the steel sheet pile 5 is penetrated into the standard position baseline in the water body 300, the soil layer 200 and the soil bearing layer 100 in the water area from top to bottom through the steel sheet pile guide groove 42.

[0072] (2) Prepare a steel sheet pile limiting device 6, and sleeved the rear end of its U-shaped bolt 69 with a rubber ring on the front row of water-facing pipe piles 3, so that the base plate 61 is located on one side of the steel sheet pile 5, and then fix and lock it through the pipe pile limiting plate 691 and an adjacent set of fixing nuts 692 and fixing pads 693; Prepare another steel sheet pile limiting device 6, and sleeved the rear end of its U-shaped bolt 69 with a rubber ring on the rear row of water-facing pipe piles 3, so that the base plate 61 is located on one side of the steel sheet pile 5 and is symmetrical to the position of the previous steel sheet pile limiting device 6, and then fix and lock it through the pipe pile limiting plate 691 and an adjacent set of fixing nuts 692 and fixing pads 693.

[0073] (3) Adjust the positions of the base plates 61 on the upper and lower two U-shaped bolts 69 of the base plates 61 of the two steel sheet pile limiting devices 6 respectively, so that the base plates 61 are in a vertical state. At the same time, make the two rollers 66 of the front and rear two steel sheet pile limiting devices 6 contact or squeeze, and the contact points of the two rollers 66 are close to or located on the standard position baseline of the steel sheet pile 5; Then fix and lock the position of the base plate 61 through two sets of fixing nuts 692 and fixing pads 693 on the front and rear of the base plate 61 arranged on the U-shaped bolt 69; Finally, observe again that the contact points of the two rollers 66 are close to or located on the standard position baseline of the steel sheet pile 5. If the contact points are not on the standard position baseline, record the forward or backward offset of the contact points, denoted as L, unit centimeter. If L is positive, it means forward offset; if L is negative, it means backward offset; Record the height between the contact point and the bottom end face of the tie beam body 41, denoted as H, unit centimeter. Input the values of the offset L and the height H into the computer system connected to the pressure sensor 68. At the same time, automatically record the values of the pressure sensors 68 of the front and rear two steel sheet pile limiting devices 6 through the computer system connected to the pressure sensor 68, denoted as F1 and F2 respectively, unit N.

[0074] S42. Insert the steel sheet pile 5 vertically downward from the steel sheet pile guiding groove 42. Wait until the steel sheet pile 5 penetrates between the two rollers 66 of the front and rear two steel sheet pile limiting devices 6 under the limit and block of the limit baffle 63. Automatically record the values of the pressure sensors 68 of the front and rear two steel sheet pile limiting devices 6 again through the computer system connected to the pressure sensor 68, denoted as F3 and F4 respectively, unit N.

[0075] In the steel sheet pile limiting device 6, when the limit baffle 63 is subjected to an external force (such as the pressure of the steel sheet pile 5), it will rotate and cause the telescopic spring in the limit spring assembly one 64 to contract. Wait until the limit baffle 63 rotates to a certain angle and then stops rotating under the block of the limit rod 65. The steel sheet pile 5 will deflect and slide outward of the limit baffle 63 under the limit and block of the limit baffle 63, so as to automatically adjust the downward penetration angle of the steel sheet pile 5 and continue to penetrate downward between the two rollers 66 of the two steel sheet pile limiting devices 6.

[0076] According to the relationship between the force on the telescopic spring and its deformation amount \(F = kx\), where \(F\) is the magnitude of the force on the telescopic spring, \(k\) is the deformation coefficient of the telescopic spring, and \(x\) is the deformation amount of the telescopic spring; then, by the numerical change of the pressure sensor 68 in the front and back, the change value of the deformation amount of the telescopic spring of the two sheet pile limiting devices 6 before and after can be calculated; and according to the offset amount \(L\) of the contact points of the two rollers 66, the offset amount of the actual position of the lower end of the sheet pile 5 from its standard position baseline can be calculated; finally, combined with the height \(H\) of the contact points of the two rollers 66 with the bottom end face of the girder body 41, the offset angle of the sheet pile 5 can be calculated.

[0077] S43. According to the recorded data, through the computer system program, it can automatically calculate whether the sheet pile 5 is vertical and its offset angle. If the calculated offset angle of the sheet pile 5 is greater than the set threshold, the computer system will automatically alarm. The operator will pull out the sheet pile 5 and insert it again. After the calculated offset angle of the sheet pile 5 is less than the set threshold, continue to insert the sheet pile 5 and successively penetrate it into the water body 300, the soil layer 200 and the soil bearing layer 100 in the water area, and ensure that the top end of the sheet pile 5 does not protrude from the top end face of the girder 4.

[0078] S44. Pour concrete 43 into the gap between the upper end of the sheet pile 5 and the inner wall of the sheet pile guiding groove 42 to ensure the stability of the sheet pile 5.

[0079] S5. Installation of the ramp panel:

[0080] Install the ramp panel 23 on the longitudinal beam 21 and the cross beam 22 that form an inclined grid-like structure, and make the ramp panel 23 closely adhere to the outer wall of the girder 4, and the low position of the ramp panel 23 is flush with the top end face of the girder 4, thus completing the entire construction process of the row pile continuous beam cantilever consolidated sheet pile composite retaining system.

[0081] Among them, as Figure 6 shown, in the sheet pile limiting device 6 of this Embodiment 2, only one U-bolt 69 is provided on the base plate 61 up and down to fix and lock the base plate 61 on a water-facing pipe pile 3; at the same time, only one roller 66 is provided.

[0082] During the installation process of the sheet pile limiting device 6 in step S41, by repeating steps (2) and (3), multiple sets of symmetrically arranged sheet pile limiting devices 6 before and after can be installed on many water-facing pipe piles 3 in the front and back rows, and through the relative installation of multiple sheet pile limiting devices 6, the penetration installation of all sheet piles 5 can be realized.

[0083] Embodiment 3:

[0084] Combined with the attached Figures 1-5 and Figure 7 , the specific implementation manners of the present invention are described as follows:

[0085] As Figures 1-5 and Figure 7 shown, the construction method of a row-pile tie beam cantilever consolidation steel sheet pile composite retaining system in this embodiment is basically the same as that in Embodiment 2, the difference being that:

[0086] As Figure 7 shown, the steel sheet pile limiting device 6 in this embodiment is of a strip-shaped structure. At least two U-shaped bolts 69 are arranged above and below the base bottom plate 61 and the base bottom plate 61 is fixedly locked on at least two water-facing pipe piles 3; meanwhile, a number of roller 66 are arranged at equal distances and evenly distributed.

[0087] Then, the penetration installation of all steel sheet piles 5 can be realized through the relative installation of one steel sheet pile limiting device 6 at the front and one at the rear.

[0088] For the construction method of a row-pile tie beam cantilever consolidation steel sheet pile composite retaining system of the present invention, a row of piles is constructed by arranging a number of prestressed pipe piles 1 at equal distances horizontally and vertically, and two rows of water-facing pipe piles 3 arranged longitudinally are used to provide support for the tie beam 4 and the steel sheet piles 5; by pouring a longitudinal beam 21 and a cross beam 22 at the top of the prestressed pipe piles 1 and installing a ramp panel 23, and by pouring a tie beam 4 at the top of the two rows of water-facing pipe piles 3 and using the steel sheet piles 5 between the two rows of water-facing pipe piles 3 to retain water, a row-pile tie beam cantilever consolidation steel sheet pile composite retaining system is constructed.

[0089] The present invention can support and protect the launch ramp, eliminating the need for cofferdam drainage construction, greatly reducing the engineering quantity, construction period and construction cost of the entire structure construction, with a stable structure and good reliability.

[0090] The above invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as such non-substantive improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A construction method for a composite retaining system of pile-connecting beam cantilevered consolidation steel sheet piles, characterized in that: It includes the following steps: S1. Sheet pile construction: A number of prestressed pipe piles (1) evenly distributed at equal distances horizontally and vertically are sequentially driven into the waterside and the water area according to the design drawings; from the waterside to the water area, the heights of the prestressed pipe piles (1) evenly distributed at equal distances gradually decrease; S2. Construction of the water-facing pipe piles: At a certain distance from the outermost prestressed pipe pile (1) in the water area, two rows of water-facing pipe piles (3) arranged longitudinally are installed and sequentially driven into the water body (300), the soil layer (200) and the soil bearing layer (100) in the water area; S3. Casting of the concrete beam: Formworks are installed at the tops of a number of prestressed pipe piles (1) evenly distributed horizontally and vertically and at the tops of the two rows of water-facing pipe piles (3), then steel bars are tied and concrete is cast. A longitudinal beam (21) and a cross beam (22) in an inclined grid structure are constructed at the tops of the number of prestressed pipe piles (1), and a tie beam (4) is constructed at the tops of the two rows of water-facing pipe piles (3); S4. Steel sheet pile construction: When casting the tie beam (4), a steel sheet pile guide groove (42) is reserved at its top. The steel sheet pile (5) is driven into the water body (300), the soil layer (200) and the soil bearing layer (100) in the water area from top to bottom through the steel sheet pile guide groove (42) so that the top of the steel sheet pile (5) does not protrude from the top surface of the tie beam (4); then concrete (43) is cast after pouring the pile top into the gap between the upper end of the steel sheet pile (5) and the inner wall of the steel sheet pile guide groove (42); S5. Installation of the ramp panel: The ramp panel (23) is installed on the longitudinal beam (21) and the cross beam (22) in an inclined grid structure, and the ramp panel (23) is closely attached to the outer wall of the tie beam (4), and the lower position of the ramp panel (23) is flush with the top surface of the tie beam (4), thus completing the entire construction process of the sheet pile tie beam cantilever consolidated steel sheet pile composite retaining system.

2. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 1, characterized in that, In step S1, the prestressed pipe pile (1) located at the waterside is directly driven into the soil bearing layer (100) at the waterside, while the prestressed pipe pile (1) located in the water area is sequentially driven into the water body (300), the soil layer (200) and the soil bearing layer (100) in the water area.

3. According to claim 1, a construction method for a composite retaining system of cantilevered consolidation steel sheet piles with pile connection beams, characterized in that: In step S3, a number of parallel longitudinal beams (21) are respectively arranged on the longitudinal prestressed pipe piles (1), and a number of parallel cross beams (22) are respectively arranged on the transverse prestressed pipe piles (1); in steps S3 and S5, a number of longitudinal beams (21), a number of cross beams (22) and the ramp panel (23) form an inclined launching ramp (2).

4. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 1, characterized in that In step S4, the liquid level height of the water body (300) changes, which is divided into a low water level line (301) and a normal water level line (302), the tie beam (4) is located above the low water level line (301) and the top surface of the tie beam (4) is not lower than the normal water level line (302).

5. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 1, characterized in that, In step S4, the steel sheet pile (5) is composed of a number of Larssen steel sheet piles connected in series through the interlocks to form a plate-like structure.

6. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 1, characterized in that, In step S4, before the steel sheet pile (5) penetrates into the steel sheet pile guiding groove (42), the steel sheet pile limiting devices (6) are respectively installed on one or more of the water-facing pipe piles (3) in two rows of water-facing pipe piles (3), and the steel sheet pile limiting devices (6) are located on one side of the steel sheet pile (5); then, under the limiting action of the steel sheet pile limiting devices (6), the steel sheet pile (5) penetrates into the water body (300), the soil layer (200) and the soil bearing layer (100) in the water area.

7. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 6, characterized in that The steel sheet pile limiting device (6) includes a base bottom plate (61), a limiting baffle plate (63), a first limiting spring assembly (64), a roller (66) and a second limiting spring assembly (67). The base bottom plate (61) is fixed on the water-facing pipe pile (3) by a U-shaped bolt (69). The limiting baffle plate (63) is hinged obliquely on the front end face of the base bottom plate (61), and the first limiting spring assembly (64) is installed between the limiting baffle plate (63) and the front end face of the base bottom plate (61); the second limiting spring assembly (67) is horizontally arranged below the limiting baffle plate (63), and the roller (66) is installed at the front end of the second limiting spring assembly (67). The rear end of the second limiting spring assembly (67) is fixed on the front end face of the base bottom plate (61) through a pressure sensor (68).

8. The construction method of a row of piles and tie beam cantilever consolidation steel sheet pile composite retaining system according to claim 7, characterized in that The steel sheet pile limiting device (6) further includes a limiting component housing (62) and a limiting rod (65). The limiting component housing (62) includes two side panels (621), a bottom plate (622), an upper end plate (623) and a front end plate (624). The two side panels (621) are both fixed on the front end face of the base bottom plate (61). The bottom plate (622) is installed between the bottoms of the two side panels (621), and the upper end plate (623) is installed between the tops of the two side panels (621); the limiting baffle plate (63), the first limiting spring assembly (64) and the second limiting spring assembly (67) are all installed on the front end face of the base bottom plate (61) inside the limiting component housing (62), and the lower end of the limiting baffle plate (63) hangs outside the limiting component housing (62); the limiting rod (65) is installed below the limiting baffle plate (63) and fixed between the two side panels (621). The front end plate (624) is installed between the front ends of the two side panels (621) between the limiting rod (65) and the second limiting spring assembly (67). The front end of the second limiting spring assembly (67) and the roller (66) hang outside the limiting component housing (62).

9. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 7, characterized in that Both the first limiting spring assembly (64) and the second limiting spring assembly (67) are composed of an inner telescopic rod, an outer sleeve tube and a telescopic spring. The rear end of the inner telescopic rod is inserted into the front end of the outer sleeve tube. The telescopic spring is sleeved outside the inner telescopic rod and the outer sleeve tube, and its two ends are respectively fixed on the outer walls of the inner telescopic rod and the outer sleeve tube. The front end of the inner telescopic rod and the rear end of the outer sleeve tube of the first limiting spring assembly (64) are respectively hinged on the limiting baffle (63) and the base bottom plate (61). The roller (66) is installed at the front end of the inner telescopic rod of the second limiting spring assembly (67). The rear end of the outer sleeve tube of the second limiting spring assembly (67) is fixed on the front side end face of the base bottom plate (61) through a pressure sensor (68).

10. The construction method of a composite retaining system of row piles, connecting beams and cantilever fixed steel sheet piles according to claim 7, characterized in that U-shaped bolt holes are provided on the base bottom plate (61). The front end of the U-shaped bolt (69) penetrates through the U-shaped bolt holes. Fixed nuts (692) and fixed backing plates (693) are provided on the U-shaped bolts (69) on the front and rear sides of the base bottom plate (61). The position of the base bottom plate (61) on the U-shaped bolt (69) is fixed and locked by the fixed nuts (692) and fixed backing plates (693) on the front and rear sides. A pipe pile limiting plate (691), a fixed nut (692) and a fixed backing plate (693) are also provided on the U-shaped bolt (69) on the rear side of the base bottom plate (61). The U-shaped bolt (69) and the pipe pile limiting plate (691) can limit and fix the water-facing pipe pile (3) and are fixed and locked by the fixed nut (692) and the fixed backing plate (693).

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