Cofferdam retaining structure, cofferdam and construction method

Abstract

The application discloses a cofferdam retaining structure, a cofferdam and a construction method, and belongs to the technical field of riverway engineering construction, the cofferdam retaining structure comprising: a retaining plate assembly and a connecting frame, the retaining plate assembly comprising an inner layer retaining plate and an outer layer retaining plate, the inner layer retaining plate and the outer layer retaining plate being arranged at intervals, a through drainage channel being formed between the inner layer retaining plate and the outer layer retaining plate, and the drainage channel being capable of allowing water flow to pass through; the connecting frame is arranged between the inner layer retaining plate and the outer layer retaining plate, the two ends of the connecting frame are connected with the inner layer retaining plate and the outer layer retaining plate respectively, and the connecting frame is provided with a first water passing hole in communication with the drainage channel, so that the water passing capacity of the cofferdam retaining structure is improved, and pollution of backfill materials to a river is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of river engineering construction, in particular to a cofferdam retaining wall structure, a cofferdam and a construction method. BACKGROUND

[0002] Steel sheet pile cofferdams are widely used in island construction in rivers. In order to increase the bearing capacity of the cofferdam, the cofferdam generally uses double-layer steel sheet piles as retaining walls, the double-layer steel sheet piles are welded and connected, and stable materials are backfilled between the double-layer steel sheet piles.

[0003] In the related art, for a relatively narrow river, the traditional steel sheet pile cofferdam occupies a large water area of the river, which leads to insufficient flood discharge capacity of the river during the flood season, and the backfill material between the double-layer steel sheet piles pollutes the river. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a cofferdam retaining wall structure, which is beneficial to improve the water passing capacity of the cofferdam retaining wall structure and avoid pollution of the river caused by backfill materials.

[0005] The present application also proposes a cofferdam.

[0006] The present application also proposes a construction method.

[0007] According to the cofferdam retaining wall structure of the first aspect of the present application, the cofferdam retaining wall structure comprises: a guard plate assembly comprising an inner guard plate and an outer guard plate, the inner guard plate and the outer guard plate are arranged in a spaced manner, a through drainage channel is constructed between the inner guard plate and the outer guard plate, and the drainage channel can pass water flow; a connecting frame is arranged between the inner guard plate and the outer guard plate, both ends of the connecting frame are connected with the inner guard plate and the outer guard plate respectively, and the connecting frame is provided with a first water passing hole in communication with the drainage channel.

[0008] The cofferdam retaining wall structure has at least the following beneficial effects: the panel assembly further comprises an inner layer panel and an outer layer panel, the connecting frame is arranged between the inner layer panel and the outer layer panel, and the two ends of the connecting frame are connected with the inner layer panel and the outer layer panel respectively to fix the relative position of the inner layer panel and the outer layer panel, thereby improving the bearing capacity of the cofferdam retaining wall structure; the cofferdam retaining wall structure constructs a through drainage channel between the inner layer panel and the outer layer panel, the drainage channel can pass water flow, the cofferdam retaining wall structure can be applied to a relatively narrow river, the drainage channel constructed between the inner layer panel and the outer layer panel can effectively improve the water passing capacity of the cofferdam retaining wall structure, reduce the obstruction of the cofferdam retaining wall structure to water flow, improve the flood discharge capacity of the river during flood season, and the connecting frame is connected in a mode instead of backfilling stabilizing materials, thereby avoiding pollution of the river caused by backfilling materials; the connecting frame is provided with a first water passing hole in communication with the drainage channel, and the first water passing hole is arranged to improve the water passing capacity of the cofferdam retaining wall structure, and the cofferdam retaining wall structure can be applied to the construction fields of bridge pile foundation, pile cap, pier column cofferdam and the like.

[0009] According to some embodiments of the present application, the outer layer panel is provided with a second water passing hole in communication with the drainage channel.

[0010] Specifically, the outer layer panel is provided with a second water passing hole in communication with the drainage channel, so that water flow can pass in and out of the drainage channel through the second water passing hole, the second water passing hole is arranged to improve the water passing capacity of the drainage channel, effectively improve the water passing capacity of the cofferdam retaining wall structure, reduce the obstruction to water flow, and improve the flood discharge capacity of the river during flood season.

[0011] According to some embodiments of the present application, the cofferdam retaining wall structure further comprises two connecting pieces, the connecting piece has a downwardly open chute, the chute is embedded with the upper end of the inner layer panel or the upper end of the outer layer panel, and the two ends of the connecting frame are fixedly connected with the two connecting pieces.

[0012] Specifically, the cofferdam retaining wall structure further comprises two connecting pieces, the connecting piece has a downwardly open chute, the chute is embedded with the upper end of the inner layer panel or the upper end of the outer layer panel, and the two ends of the connecting frame are fixedly connected with the two connecting pieces.

[0013] According to some embodiments of the present application, the cofferdam retaining structure further comprises a first fastener and two waterproof gaskets, the connecting member is connected with the first fastener and the two waterproof gaskets, the inner layer retaining plate and the outer layer retaining plate are both provided with a first through hole, the connecting member is provided with a second through hole, the first fastener is arranged through one of the waterproof gaskets, the first through hole, the second through hole and the other waterproof gasket, so as to fix the connecting member with the inner layer retaining plate or the outer layer retaining plate.

[0014] Specifically, the cofferdam retaining structure further comprises a first fastener and two waterproof gaskets, the connecting member is connected with the first fastener and the two waterproof gaskets, the first fastener is arranged through one of the waterproof gaskets, the first through hole, the second through hole and the other waterproof gasket, that is, the cofferdam retaining structure is fixedly connected with the inner layer retaining plate or the outer layer retaining plate through the assembled connection, compared with direct welding, the cofferdam retaining structure is connected with the inner layer retaining plate or the outer layer retaining plate through the assembly, which can reduce the amount of field welding operation, is convenient to assemble and disassemble, the material can be reused, and the waterproof gasket is arranged to facilitate reducing the erosion of the first fastener, the first through hole or the second through hole by water flow, and facilitating improving the connection stability of the connecting member with the inner layer retaining plate or the outer layer retaining plate.

[0015] According to some embodiments of the present application, the connecting member comprises a first support and two second supports, the first support is provided with a sliding groove, the two second supports are connected to the same end of the first support, the two second supports are arranged in an up-down manner and are both located in the drainage channel, and the two second supports are respectively connected with the upper end and the lower end of the connecting frame.

[0016] Specifically, the connecting member comprises a first support and two second supports, the two second supports are connected to the same end of the first support, the two second supports are arranged in an up-down manner and are both located in the drainage channel, and the two second supports are respectively connected with the upper end and the lower end of the connecting frame, and the upper end and the lower end of the connecting frame are abutted with the two second supports to limit the connecting frame in the up-down direction, which is beneficial to fixing the relative position relationship between the connecting frame and the connecting member.

[0017] According to some embodiments of the present application, the second support is connected with a second fastener at the joint with the connecting frame, the second support is provided with a third through hole, the connecting frame is provided with a fourth through hole opposite to the third through hole, and the second fastener is arranged through the third through hole and the fourth through hole to fix the connecting frame with the connecting member.

[0018] Specifically, the second support is connected with the second fastener at the joint with the connecting frame, the second support is provided with a third through hole, the connecting frame is provided with a fourth through hole opposite to the third through hole, and the second fastener is arranged in the third through hole and the fourth through hole to fix the connecting frame and the connecting piece. Compared with direct welding, the cofferdam retaining wall structure is assembled to realize the connection of the connecting frame and the connecting piece, so that the connecting frame and the connecting piece are more convenient to assemble and disassemble, the material can be reused, and the amount of on-site electric welding is reduced.

[0019] According to some embodiments of the present application, the third through hole is a strip-shaped hole, and the length direction of the strip-shaped hole extends from one of the inner layer guard plate and the outer layer guard plate to the other.

[0020] Specifically, the third through hole is a strip-shaped hole, and the length direction of the strip-shaped hole extends from one of the inner layer guard plate and the outer layer guard plate to the other. The second fastener is arranged in the strip-shaped hole, and by adjusting the position of the second fastener in the strip-shaped hole, the two ends of the connecting frame can be connected with the two connecting pieces respectively to compensate for the machining and size errors or improve the applicability of the connecting frame.

[0021] According to some embodiments of the present application, a plurality of connecting frames are arranged, and the plurality of connecting frames are arranged along the length direction of the drainage channel.

[0022] A plurality of connecting frames are arranged, and the plurality of connecting frames are arranged along the length direction of the drainage channel. By connecting the plurality of connecting frames, the connection stability of the inner layer guard plate and the outer layer guard plate is improved, and the normal operation of the drainage channel is ensured.

[0023] According to the cofferdam of the second aspect of the embodiments of the present application, the cofferdam comprises the retaining wall structure of the cofferdam as shown in the first aspect.

[0024] According to the cofferdam of the embodiment of the present application, the cofferdam comprises the retaining wall structure of the cofferdam of the first aspect, the retaining plate assembly further comprises an inner retaining plate and an outer retaining plate, a connecting frame is arranged between the inner retaining plate and the outer retaining plate, and the two ends of the connecting frame are connected with the inner retaining plate and the outer retaining plate respectively to fix the relative position of the inner retaining plate and the outer retaining plate, which is beneficial to improve the bearing capacity of the retaining wall structure of the cofferdam. The retaining wall structure of the cofferdam constructs a through drainage channel between the inner retaining plate and the outer retaining plate, the drainage channel can be used for water flow, the retaining wall structure of the cofferdam can be applied to a relatively narrow river, the drainage channel constructed between the inner retaining plate and the outer retaining plate can effectively improve the water passing capacity of the retaining wall structure of the cofferdam, reduce the obstruction of the retaining wall structure of the cofferdam to the water flow, improve the flood discharge capacity of the river in the flood season, and the connecting frame is connected in a mode instead of backfilling a stabilizing material, which is beneficial to avoid pollution of the river caused by the backfilling material. The connecting frame is provided with a first water passing hole in communication with the drainage channel, the first water passing hole is beneficial to improve the water passing capacity of the retaining wall structure of the cofferdam, and the retaining wall structure of the cofferdam can be applied to the construction fields of bridge pile foundation, pile cap, pier column cofferdam and the like.

[0025] The construction method of the third aspect of the embodiment of the present application is applied to the retaining wall structure of the cofferdam of claim 7, and the construction method comprises the following steps.

[0026] The inner retaining plate and the outer retaining plate are driven to a preset elevation.

[0027] The sliding groove of the outer connecting piece is embedded with the upper end of the outer retaining plate, the outer retaining plate is drilled to form a first perforation, and the first fastener is threaded through one waterproof gasket, the first perforation, the second perforation of the outer connecting piece and another waterproof gasket to fix the outer connecting piece and the outer retaining plate.

[0028] The connecting frame is arranged between the two second supports of the outer connecting piece, and the second fastener is threaded through the strip-shaped hole of the outer connecting piece and the fourth perforation of the connecting frame to fix the connecting frame and the outer connecting piece.

[0029] The sliding groove of the inner connecting piece is embedded with the upper end of the inner retaining plate, the connecting frame is arranged between the two second supports of the inner connecting piece, and the second fastener is threaded through the strip-shaped hole of the inner connecting piece and the fourth perforation of the connecting frame to fix the connecting frame and the inner connecting piece.

[0030] The inner retaining plate is drilled to form a first perforation, and the first fastener is threaded through one waterproof gasket, the first perforation, the second perforation of the inner connecting piece and another waterproof gasket to fix the inner connecting piece and the inner retaining plate.

[0031] According to the construction method, the inner layer guard plate and the outer layer guard plate are first inserted into the soil by the external pile driving equipment to be arranged in a spaced manner and to be driven to a preset elevation, then the sliding groove of the outer side connecting piece is embedded with the upper end of the outer layer guard plate, the outer side connecting piece is hung on the upper end of the outer layer guard plate, the outer layer guard plate is drilled to form a first through hole, the first fastener is passed through a waterproof gasket, the first through hole, a second through hole of the outer side connecting piece and another waterproof gasket at the outer side connecting piece to fix the outer side connecting piece and the outer layer guard plate, the connecting frame is arranged between the two second supports of the outer side connecting piece, the second fastener is passed through the strip-shaped hole of the outer side connecting piece and the fourth through hole of the connecting frame to fix the connecting frame and the outer side connecting piece, the sliding groove of the inner side connecting piece is embedded with the upper end of the inner layer guard plate, the inner side connecting piece is hung on the upper end of the inner layer guard plate, the connecting frame is arranged between the two second supports of the inner side connecting piece through the relative sliding of the sliding groove and the inner layer guard plate, the second fastener is passed through the strip-shaped hole of the inner side connecting piece and the fourth through hole of the connecting frame to fix the connecting piece and the connecting frame, the position of the second fastener in the strip-shaped hole is adjusted to ensure that the two ends of the connecting frame are connected with the two connecting pieces, the inner layer guard plate is drilled to form a first through hole, the first fastener is passed through a waterproof gasket, the first through hole, a second through hole of the inner side connecting piece and another waterproof gasket at the inner side connecting piece to fix the inner side connecting piece and the inner layer guard plate, compared with direct welding, the construction method can reduce the amount of on-site electric welding, is convenient to assemble and disassemble, the materials can be reused, the slippage of the inner layer guard plate or the outer layer guard plate in the sliding groove can prevent the problem of misalignment caused by insufficient drilling precision, the retaining wall structure of the cofferdam can be applied to a relatively narrow river, the drainage channel formed between the inner layer guard plate and the outer layer guard plate can effectively improve the water passing capacity of the retaining wall structure of the cofferdam, reduce the obstruction to the water flow, improve the flood discharge capacity of the river during the flood season, and the connecting frame is connected in a mode instead of backfilling the stabilizing material, which can prevent the pollution of the river caused by the backfilling material, the connecting frame is provided with a first water passing hole in communication with the drainage channel, the first water passing hole can improve the water passing capacity of the retaining wall structure of the cofferdam, and the retaining wall structure of the cofferdam can be applied to the construction fields of bridge pile foundation, pile cap, pier cofferdam and the like.

[0032] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The application will be further described below in conjunction with the drawings and embodiments, wherein:

[0034] Figure 1A structural schematic view of a cofferdam's retaining structure according to an embodiment of the present application;

[0035] Figure 2 A structural schematic view of a cofferdam's retaining structure according to an embodiment of the present application from another perspective;

[0036] Figure 3 A top view of a cofferdam's retaining structure according to an embodiment of the present application; Figure 1 A top view of a cofferdam's retaining structure according to an embodiment of the present application;

[0037] Figure 4 A sectional view of a cofferdam's retaining structure according to an embodiment of the present application;

[0038] Figure 5 A sectional view of a cofferdam's retaining structure according to an embodiment of the present application; Figure 1 An enlarged view of a portion A of a cofferdam's retaining structure according to an embodiment of the present application;

[0039] Figure 6 An enlarged view of a portion B of a cofferdam's retaining structure according to an embodiment of the present application; Figure 4 An enlarged view of a portion B of a cofferdam's retaining structure according to an embodiment of the present application;

[0040] Figure 7 A structural schematic view of a cofferdam's retaining structure according to an embodiment of the present application;

[0041] Figure 8 A flow chart of a construction method according to an embodiment of the present application.

[0042] Reference Signs:

[0043] 110, inner layer of retaining plates; 120, outer layer of retaining plates; 130, drainage passage; 140, first perforation;

[0044] 200, connecting frame; 210, first water passage hole; 220, fourth perforation;

[0045] 300, connecting member; 310, first support; 311, sliding groove; 312, second perforation; 320, second support; 321, third perforation;

[0046] 410, first fastener; 420, second fastener. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or like reference numerals are used throughout the drawings to refer to the same or like elements or elements having the same or similar function. The embodiments described below are exemplary, and are merely intended to explain the present application, and should not be understood as limiting the present application.

[0048] In the description of the present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by up, down and the like, is based on the orientation or position relationship shown in the drawings, only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In the description of the present application, more refers to more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the sequence of technical features indicated.

[0050] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0051] Referring to Figures 1 to 7 , a cofferdam retaining structure of an embodiment of the present application includes a retaining plate assembly and a connecting frame 200.

[0052] Referring to Figure 1 , Figure 2 and Figure 3 , wherein the retaining plate assembly includes an inner layer retaining plate 110 and an outer layer retaining plate 120, the inner layer retaining plate 110 and the outer layer retaining plate 120 are arranged in a spaced manner, and a through drainage channel 130 is constructed between the inner layer retaining plate 110 and the outer layer retaining plate 120, which can allow water flow.

[0053] The following is an example of the outer layer retaining plate 120 and the inner layer retaining plate 110 being arranged in a left-right spaced manner, the width direction of the drainage channel 130 being the left-right direction, and the length direction of the drainage channel 130 being the front-rear direction.

[0054] Referring to Figure 1 , Figure 2 and Figure 3 , the connecting frame 200 is arranged between the inner layer retaining plate 110 and the outer layer retaining plate 120, and the two ends of the connecting frame 200 are connected with the inner layer retaining plate 110 and the outer layer retaining plate 120 respectively, so as to fix the relative position of the inner layer retaining plate 110 and the outer layer retaining plate 120, which is beneficial to improve the load bearing capacity of the cofferdam retaining structure.

[0055] Referring to Figure 1 , Figure 2 and Figure 3As shown, the cofferdam retaining wall structure is configured with a through drainage channel 130 between the inner retaining plate 110 and the outer retaining plate 120, the through drainage channel 130 can pass water flow, the cofferdam retaining wall structure can be applied to narrow river use, the through drainage channel 130 between the inner retaining plate 110 and the outer retaining plate 120 can effectively improve the water passing capacity of the cofferdam retaining wall structure, reduce the obstruction of the cofferdam retaining wall structure to the water flow, and improve the flood discharge capacity of the river in the flood season.

[0056] The conventional steel sheet pile cofferdam cannot pass water or has a large obstruction to water flow in the retaining wall formed by two layers of steel sheet piles, resulting in that the conventional steel sheet pile cofferdam has a serious obstruction to water flow when applied to a narrow river, and is prone to water level rise in the flood season due to insufficient flood discharge capacity, which causes safety hazards to crops or residents on both sides of the river.

[0057] The cofferdam retaining wall structure provided by the embodiment of the present application adopts a connection frame 200 connection mode instead of backfilling stable materials, which is beneficial to avoid pollution of backfilling materials to the river, the connection frame 200 is provided with a first water passing hole 210 in communication with the drainage channel 130, and the first water passing hole 210 is beneficial to enhance the water passing capacity of the cofferdam retaining wall structure, and the cofferdam retaining wall structure can be applied to the construction fields of bridge pile foundation, pile cap, pier cofferdam, etc.

[0058] Referring to Figure 1 , Figure 2 and Figure 3 , for the cofferdam applying the cofferdam retaining wall structure, the extension direction of the drainage channel 130 can be set according to the flow direction of the river, so that the extension direction of the drainage channel 130 is the same as the water flow direction of the river, to improve the water passing capacity of the cofferdam and improve the flood discharge capacity of the river in the flood season.

[0059] Referring to Figure 1 , Figure 2 and Figure 3 , specifically, the connection frame 200 can be a shaped Bailey piece, which stably connects the inner retaining plate 110 and the outer retaining plate 120, and forms a plurality of first water passing holes 210 in the connection frame 200 to improve the water passing capacity of the cofferdam retaining wall structure. The inner retaining plate 110 and the outer retaining plate 120 can be selected as steel sheet piles to improve the overall stability of the cofferdam retaining wall structure.

[0060] It can be understood that specifically, the outer retaining plate 120 is provided with a second water passing hole in communication with the drainage channel 130, so that the water flow can pass in and out of the drainage channel 130 through the second water passing hole, and the second water passing hole is beneficial to improve the water passing capacity of the drainage channel 130, effectively improve the water passing capacity of the cofferdam retaining wall structure, and improve the flood discharge capacity of the river in the flood season.

[0061] Specifically, the inner layer guard plate 110 is made of a water-tight material to ensure that a construction space is formed inside the cofferdam and to reduce the interference of water flow on the construction work in the construction space, which can be used for bridge pile foundation, pile cap, pier column cofferdam and other construction work.

[0062] It can be understood that the plurality of connecting frames 200 are arranged along the length direction of the drainage channel 130, i.e., the plurality of connecting frames 200 are arranged in front of and behind each other, and the plurality of connecting frames 200 are connected to improve the connection stability of the inner layer guard plate 110 and the outer layer guard plate 120 and ensure the normal operation of the drainage channel 130.

[0063] Specifically, the cofferdam guard wall structure further comprises a plurality of connecting pieces 300, and each connecting frame 200 is connected to two connecting pieces 300. The connecting piece 300 has a chute 311 with an opening facing downward, and the chute 311 is connected to the upper end of the inner layer guard plate 110 or the upper end of the outer layer guard plate 120. The two ends of the connecting frame 200 are fixedly connected to the two connecting pieces 300, respectively.

[0064] The user can embed the chute 311 into the upper end of the inner layer guard plate 110 or the upper end of the outer layer guard plate 120, and the upper end of the chute 311 abuts against the upper end of the inner layer guard plate 110 or the outer layer guard plate 120 to hang the connecting piece 300 on the upper end of the inner layer guard plate 110 or the outer layer guard plate 120. By sliding the inner layer guard plate 110 or the outer layer guard plate 120 in the chute 311, the connection position of the connecting piece 300 and the inner layer guard plate 110 or the outer layer guard plate 120 can be conveniently adjusted. The two ends of the connecting frame 200 are fixedly connected to the two connecting pieces 300, respectively, i.e., the connecting frame 200 is connected to the inner layer guard plate 110 or the outer layer guard plate 120 through the connecting piece 300.

[0065] Compared with direct welding, the cofferdam guard wall structure connects the connecting frame 200 to the inner layer guard plate 110 or the outer layer guard plate 120 through the connecting piece 300, which is beneficial to reduce the amount of on-site electric welding, is convenient to assemble and disassemble, the material can be reused, and by sliding the inner layer guard plate 110 or the outer layer guard plate 120 in the chute 311, it is beneficial to avoid the problem that the connecting piece 300 cannot be connected to the inner layer guard plate 110 or the outer layer guard plate 120 due to insufficient punching precision.

[0066] Referring to Figure 1 , Figure 4 and Figure 6 It can be understood that the cofferdam guard wall structure further comprises a first fastener 410 and a waterproof gasket, and each connecting piece 300 is connected to a second fastener 420 and two waterproof gaskets.

[0067] Referring to Figure 1 , Figure 4 and Figure 6As shown in the drawings, the inner layer guard plate 110 and the outer layer guard plate 120 are both provided with the first through hole 140, the connecting piece 300 is provided with the second through hole 312, and the first fastener 410 is threaded through one waterproof gasket, the first through hole 140, the second through hole 312 and another waterproof gasket to fix the connecting piece 300 with the inner layer guard plate 110 or the outer layer guard plate 120, and the stable connection of the connecting piece 300 with the inner layer guard plate 110 or the outer layer guard plate 120 is realized through the connection of the first fastener 410 and the abutment of the upper end of the sliding groove 311 with the inner layer guard plate 110 or the outer layer guard plate 120.

[0068] Referring to Figure 4 , Figure 6 and Figure 7 , that is, the cofferdam guard wall structure is connected in an assembled manner to realize the fixed connection of the connecting piece 300 with the inner layer guard plate 110 or the outer layer guard plate 120, which is beneficial to reduce the amount of field welding, is more convenient to assemble and disassemble, and the materials can be reused. The waterproof gasket is beneficial to reduce the erosion of the water flow on the first fastener 410, the first through hole 140 or the second through hole 312, and is beneficial to improve the connection stability of the connecting piece 300 with the inner layer guard plate 110 or the outer layer guard plate 120.

[0069] Referring to Figure 4 , Figure 6 and Figure 7 , specifically, the first fastener 410 includes a first bolt and a first nut, the first bolt is threaded through one waterproof gasket, the first through hole 140, the second through hole 312 and another waterproof gasket and is threadedly connected with the first nut, and the rotation of the first bolt and the first nut can exert a clamping force on the two waterproof gaskets and the connecting piece 300 and the inner layer guard plate 110 or the outer layer guard plate 120 to move closer to each other, so as to realize the fixation of the connecting piece 300 and the connecting frame 200 and improve the connection stability of the connecting piece 300 and the connecting frame 200.

[0070] Referring to Figure 1 , Figure 4 and Figure 7 , it can be understood that specifically, the connecting piece 300 includes a first support 310 and two second supports 320, the two second supports 320 are connected to the same end of the first support 310, the two second supports 320 are arranged in an upper and lower manner and are both located in the drainage channel 130, and the two second supports 320 are respectively connected with the upper end and the lower end of the connecting frame 200. The upper end and the lower end of the connecting frame 200 abut against the two second supports 320 to realize the limiting of the connecting frame 200 in the up-down direction, which is beneficial to fix the relative position relationship between the connecting frame 200 and the connecting piece 300.

[0071] Referring to Figure 1 , Figure 4 and Figure 7As shown, taking the outer protective plate 120 and the inner protective plate 110 arranged at left-right intervals as an example, one connector 300 is connected to the outer protective plate 120. In the outer connector 300, two second supports 320 are connected to the right end of the first support 310, so that the two second supports 320 are located inside the drainage channel 130, and a stable connection is achieved between the second supports 320 and the connecting frame 200. The other connector 300 is connected to the inner protective plate 110. In the inner connector 300, two second supports 320 are connected to the left end of the first support 310, so that the two second supports 320 are located inside the drainage channel 130, and a stable connection is achieved between the second supports 320 and the connecting frame 200.

[0072] Reference Figure 1 , Figure 5 and Figure 7 As shown, it can be understood that a second fastener 420 is connected at the junction of the second bracket 320 and the connecting frame 200. The second bracket 320 is provided with a third through hole 321, and the connecting frame 200 is provided with a fourth through hole 220 opposite to the third through hole 321. The second fastener 420 passes through the third through hole 321 and the fourth through hole 220 to fix the connecting frame 200 and the connecting member 300.

[0073] Reference Figure 1 , Figure 5 and Figure 7 As shown, compared with direct welding, the retaining wall structure of the cofferdam adopts an assembly method to connect the connecting frame 200 and the connecting piece 300, making it easier to assemble and disassemble the connecting frame 200 and the connecting piece 300, and the materials can be reused, reducing the amount of on-site electric welding work.

[0074] Reference Figure 1 , Figure 5 and Figure 7 As shown, specifically, the second fastener 420 includes a second bolt and a second nut. The second bolt passes through the third through hole 321 and the fourth through hole 220 and is threadedly connected to the second nut. By screwing the second bolt and the second nut together, a clamping force is applied to the connecting frame 200 and the second bracket 320 to fix the connecting frame 200 and the second bracket 320, so as to realize the detachable connection between the connecting frame 200 and the connecting piece 300.

[0075] Specifically, in the connector 300, the distance between the two second brackets 320 is greater than the height of the connector 200, so as to ensure that the connector 200 can be placed between the two second brackets 320. By screwing the second bolt and the second nut, a clamping force is applied to the connector 200 and the second brackets 320 to fix the connector 200 and the second brackets 320, so as to realize the detachable connection between the connector 200 and the connector 300.

[0076] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that specifically, the third perforation 321 is a strip-shaped hole, the length direction of the strip-shaped hole extends from one of the inner layer guard plate 110 and the outer layer guard plate 120 to the other, and the second fastener 420 is arranged in the strip-shaped hole. By adjusting the position of the second fastener 420 in the strip-shaped hole, the two ends of the connecting frame 200 can be ensured to be connected with the two connecting pieces 300 respectively, so as to compensate for the machining error or improve the applicability of the connecting frame 200.

[0077] Taking the left connecting piece 300 as an example, the second support 320 is connected to the right end of the first support 310, and the second support 320 is arranged at a right angle with the first support 310. The length direction of the second support 320 extends to the right, and the length direction of the strip-shaped hole arranged on the second support 320 extends from left to right.

[0078] Taking the right connecting piece 300 as an example, the second support 320 is connected to the left end of the first support 310, and the second support 320 is arranged at a right angle with the first support 310. The length direction of the second support 320 extends to the left, and the length direction of the strip-shaped hole arranged on the second support 320 extends from right to left.

[0079] Referring to Figure 1 , Figure 2 and Figure 3 , it can be understood that the cofferdam guard wall structure further comprises a scaffold and a guardrail. The scaffold is arranged at the upper end of the inner layer guard plate 110 and the outer layer guard plate 120, and the inner layer guard plate 110 and the outer layer guard plate 120 can support the scaffold. The guardrail is connected to the upper end of the scaffold and is arranged around the outer edge of the scaffold. The scaffold and the guardrail jointly define a working platform for workers to walk on, so as to assist the workers to implement river engineering construction work.

[0080] Referring to Figure 1 , Figure 2 and Figure 3 , in an embodiment of the present application, the cofferdam comprises two cofferdam guard wall structures as shown in any one of the above embodiments. In the two cofferdam guard wall structures, the two drainage channels 130 are parallel to each other, and the two drainage channels 130 are consistent with the water flow direction of the river where the cofferdam is located.

[0081] Referring to Figure 1 , Figure 2 and Figure 8As shown, the cofferdam comprises the retaining structure of the cofferdam of the first aspect, the retaining plate assembly further comprises an inner retaining plate 110 and an outer retaining plate 120, and the connecting frame 200 is arranged between the inner retaining plate 110 and the outer retaining plate 120, and the two ends of the connecting frame 200 are connected with the inner retaining plate 110 and the outer retaining plate 120 respectively, so as to fix the relative position of the inner retaining plate 110 and the outer retaining plate 120, which is beneficial to improve the bearing capacity of the retaining structure of the cofferdam. The retaining structure of the cofferdam constructs a through drainage channel 130 between the inner retaining plate 110 and the outer retaining plate 120, and the drainage channel 130 can pass water flow. The retaining structure of the cofferdam can be applied to narrower river channels. The drainage channel 130 constructed between the inner retaining plate 110 and the outer retaining plate 120 can effectively improve the water passing capacity of the retaining structure of the cofferdam, can improve the flood discharge capacity of the river in the flood season, and the connecting mode of the connecting frame 200 is adopted instead of backfilling the stabilizing material, which is beneficial to avoid the pollution of the backfilling material to the river. The connecting frame 200 is provided with a first water passing hole 210 in communication with the drainage channel 130. The first water passing hole 210 is beneficial to enhance the water passing capacity of the retaining structure of the cofferdam. The retaining structure of the cofferdam can be applied to the construction fields of bridge pile foundation, pile cap, pier cofferdam and the like.

[0082] Referring to Figure 1 , Figure 2 and Figure 8 , the construction method of one embodiment of the present application is applied to the retaining structure of the cofferdam as shown in the above embodiment. The construction method comprises the following steps:

[0083] Step S100, the inner retaining plate 110 and the outer retaining plate 120 are set to a predetermined elevation;

[0084] Step S200, the sliding groove 311 of the outer connecting piece 300 is embedded with the upper end of the outer retaining plate 120, the outer retaining plate 120 is drilled, the outer retaining plate 120 forms a first perforation 140, and the first fastener 410 is arranged in one waterproof gasket, the first perforation 140, the second perforation 312 of the outer connecting piece 300 and another waterproof gasket, so as to fix the outer connecting piece 300 and the outer retaining plate 120;

[0085] Step S300, the connecting frame 200 is arranged between the two second supports 320 of the outer connecting piece 300, and the second fastener 420 is arranged through the strip-shaped hole of the outer connecting piece 300 and the fourth perforation 220 of the connecting frame 200, so as to fix the connecting frame 200 and the outer connecting piece 300;

[0086] Step S400, the sliding groove 311 of the inner connecting piece 300 is embedded with the upper end of the inner layer guard plate 110, the connecting frame 200 is placed between the two second supports 320 of the inner connecting piece 300, and the second fastener 420 is passed through the strip-shaped hole of the inner connecting piece 300 and the fourth perforation 220 of the connecting frame 200 to fix the connecting frame 200 and the inner connecting piece 300;

[0087] Step S500, the inner layer guard plate 110 is drilled to form the first perforation 140, and the first fastener 410 is passed through one waterproof gasket, the first perforation 140, the second perforation 312 of the inner connecting piece 300 and the other waterproof gasket to fix the inner connecting piece 300 and the inner layer guard plate 110.

[0088] Referring to Figure 1 , Figure 2 and Figure 8As shown, when the user constructs the retaining structure of the cofferdam, first, the inner layer retaining plate 110 and the outer layer retaining plate 120 can be inserted into the soil by the external pile driving equipment, so that the inner layer retaining plate 110 and the outer layer retaining plate 120 are arranged in a spaced manner, and the inner layer retaining plate 110 and the outer layer retaining plate 120 are driven to a predetermined elevation, then the sliding groove 311 of the outer connecting piece 300 is embedded with the upper end of the outer layer retaining plate 120, that is, the connecting piece 300 is hung on the upper end of the outer layer retaining plate 120, then the outer layer retaining plate 120 is drilled to form a first through hole 140, at the outer connecting piece 300, the first fastener 410 is inserted into a waterproof gasket, the first through hole 140, the second through hole 312 of the outer connecting piece 300 and another waterproof gasket, so as to fix the outer connecting piece 300 and the outer layer retaining plate 120, then the connecting frame 200 is placed between the two second supports 320 of the outer connecting piece 300, the second fastener 420 is inserted through the strip-shaped hole of the outer connecting piece 300 and the fourth through hole 220 of the connecting frame 200, so as to fix the connecting frame 200 and the outer connecting piece 300, the sliding groove 311 of the inner connecting piece 300 is embedded with the upper end of the inner layer retaining plate 110, that is, the inner connecting piece 300 is hung on the upper end of the inner layer retaining plate 110, by the relative sliding of the sliding groove 311 and the inner layer retaining plate 110, the connecting frame 200 can be placed between the two second supports 320 of the inner connecting piece 300, the second fastener 420 is inserted through the strip-shaped hole of the inner connecting piece 300 and the fourth through hole 220 of the connecting frame 200, so as to fix the connecting piece 300 and the connecting frame 200, by adjusting the position of the second fastener 420 in the strip-shaped hole, the connection of the two ends of the connecting frame 200 and the two connecting pieces 300 is ensured, then the inner layer retaining plate 110 is drilled to form a first through hole 140, at the inner connecting piece 300, the first fastener 410 is inserted into a waterproof gasket, the first through hole 140, the second through hole 312 of the inner connecting piece 300 and another waterproof gasket, so as to fix the inner connecting piece 300 and the inner layer retaining plate 110, by the reasonable construction sequence, the construction method can effectively avoid the adverse working conditions caused by the misplacement of the inner connecting piece 300 or the outer connecting piece 300, which leads to the failure to install.

[0089] Referring to Figure 1 , Figure 2 and Figure 8 , compared with direct welding, the construction method can reduce the amount of field welding operation, is convenient to assemble and disassemble, the materials can be reused, and by the sliding of the inner layer retaining plate 110 or the outer layer retaining plate 120 in the sliding groove 311, the problem of misalignment caused by insufficient drilling precision can be avoided.

[0090] Referring to ​ , ​ and ​As shown, the cofferdam retaining structure can be applied to narrow river use, the drainage channel 130 formed between the inner layer 110 and the outer layer 120 can effectively improve the water capacity of the cofferdam retaining structure, reduce the resistance to the water flow, improve the flood discharge capacity of the river during the flood season, and replace the backfilling of the connecting frame 200. The connecting frame 200 is connected in a way to avoid pollution caused by backfilling materials to the river, and the connecting frame 200 is provided with a first water hole 210 in communication with the drainage channel 130. The first water hole 210 is provided to enhance the water capacity of the cofferdam retaining structure. The cofferdam retaining structure can be applied to bridge pile foundation, pile cap, pier cofferdam and other construction fields.

[0091] It should be noted that the construction method can be processed by a handheld plasma cutting machine to form a first perforation 140 on the inner layer 110 or the outer layer 120. Before processing the inner layer 110 or the outer layer 120, the to-be-processed area of the inner layer 110 or the outer layer 120 can be marked to improve the accuracy of processing.

[0092] The above describes the embodiments of the present application in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A construction method for the retaining wall structure applied to cofferdams, characterized in that, The retaining wall structure of the cofferdam includes: The protective panel assembly includes an inner protective panel (110) and an outer protective panel (120), wherein the inner protective panel (110) and the outer protective panel (120) are arranged at intervals, and a through drainage channel (130) is constructed between the inner protective panel (110) and the outer protective panel (120), wherein the drainage channel (130) is capable of allowing water to flow through; A connecting frame (200) is disposed between the inner protective plate (110) and the outer protective plate (120). The two ends of the connecting frame (200) are respectively connected to the inner protective plate (110) and the outer protective plate (120). The connecting frame (200) is provided with a first water passage hole (210) communicating with the drainage channel (130). Two connectors (300) have downward-facing grooves (311) that fit into the upper end of the inner protective plate (110) or the upper end of the outer protective plate (120). The two ends of the connecting frame (200) are fixedly connected to the two connectors (300) respectively. The first fastener (410) and two waterproof gaskets are connected to the first fastener (410) and the two waterproof gaskets. The inner protective plate (110) and the outer protective plate (120) are both provided with a first through hole (140). The connector (300) is provided with a second through hole (312). The first fastener (410) passes through one of the waterproof gaskets, the first through hole (140), the second through hole (312) and the other waterproof gasket to fix the connector (300) to the inner protective plate (110) or the outer protective plate (120). The connector (300) includes a first bracket (310) and two second brackets (320). The first bracket (310) is provided with the slide groove (311). The two second brackets (320) are connected to the same end of the first bracket (310). The two second brackets (320) are arranged vertically and are both located in the drainage channel (130). The two second brackets (320) are respectively connected to the upper end and the lower end of the connecting frame (200). A second fastener (420) is connected to the junction of the second bracket (320) and the connecting frame (200). The second bracket (320) is provided with a third through hole (321), and the connecting frame (200) is provided with a fourth through hole (220) opposite to the third through hole (321). The second fastener (420) passes through the third through hole (321) and the fourth through hole (220) to fix the connecting frame (200) and the connecting member (300). The third perforation (321) is a strip-shaped hole, and the length direction of the strip-shaped hole extends from one of the inner protective plate (110) and the outer protective plate (120) to the other; The construction method includes: The inner protective plate (110) and the outer protective plate (120) are installed to a preset elevation; The groove (311) of the outer connector (300) is fitted with the upper end of the outer protective plate (120), and a hole is drilled in the outer protective plate (120) to form the first through hole (140). The first fastener (410) is passed through one of the waterproof gaskets, the first through hole (140), the second through hole (312) of the outer connector (300), and another waterproof gasket to fix the outer connector (300) and the outer protective plate (120). The connecting bracket (200) is placed between the two second brackets (320) of the outer connecting member (300), and the second fastener (420) is passed through the strip hole of the outer connecting member (300) and the fourth through hole (220) of the connecting bracket (200) to fix the connecting bracket (200) and the outer connecting member (300); The groove (311) of the inner connector (300) is fitted with the upper end of the inner protective plate (110), the connecting frame (200) is placed between the two second brackets (320) of the inner connector (300), and the second fastener (420) is passed through the strip hole of the inner connector (300) and the fourth through hole (220) of the connecting frame (200) to fix the connecting frame (200) and the inner connector (300); Drill a hole in the inner protective plate (110) to form the first through hole (140) in the inner protective plate (110), and pass the first fastener (410) through one of the waterproof gaskets, the first through hole (140), the second through hole (312) of the inner connector (300) and another waterproof gasket to fix the inner connector (300) and the inner protective plate (110).

2. The construction method for the retaining wall structure applied to a cofferdam according to claim 1, characterized in that: The outer protective plate (120) is provided with a second water passage hole that communicates with the drainage channel (130).

3. The construction method for the retaining wall structure applied to a cofferdam according to claim 1, characterized in that: Multiple connecting frames (200) are provided, and the multiple connecting frames (200) are arranged in a row along the length direction of the drainage channel (130).

Images