Steel sheet pile connecting structure

Abstract

The invention discloses a steel sheet pile connecting structure, relates to the technical field of special sheet pile walls for foundation engineering, and aims to improve the strength and rigidity of a joint part for vertically connecting steel sheet pile sections. According to the technical scheme, according to the steel sheet pile connecting structure, adjacent steel sheet pile sections are connected through inserting pieces in the longitudinal direction and connected through locking openings in the transverse direction, the longitudinal direction of the steel sheet pile sections is the vertical direction in the construction period, and the transverse direction of the steel sheet pile sections is the extending direction of steel sheet piles on the horizontal plane in the construction period; the steel sheet pile section comprises a web and wing plates on the two sides of the web, and locking openings matched with each other are formed in the edges of the wing plates. The plug connector comprises two baffles and a connecting part between the two baffles, the gap between the two baffles is divided into an upper inserting groove and a lower inserting groove through the connecting part, the lower end of the steel sheet pile section on the upper portion of the plug connector is inserted into the upper inserting groove and fixedly connected with the upper inserting groove, and the upper end of the steel sheet pile section on the lower portion of the plug connector is inserted into the lower inserting groove and fixedly connected with the lower inserting groove. The method is used for connecting the steel sheet pile sections and forming the steel sheet pile.

Description

Technical Field

[0001] The invention relates to the technical field of sheet pile walls dedicated to foundation engineering, in particular to a steel sheet pile connection structure. Background Art

[0002] Steel sheet piles are flexible support structures with the advantages of high mechanization, fast construction speed, good support effect, and multiple recycling. They also have a certain water-stopping effect and are widely used in foundation pit support and cofferdam construction in clay, silt and other strata. Steel sheet piles are generally hot-rolled in the factory and shipped out according to the required length. Sufficient construction clearance height is required when driving in and out of the steel sheet piles. At construction sites such as municipal engineering and construction projects, local areas will be affected by obstacles such as overhead power lines, buildings, and bridges, resulting in limited construction clearance height. When the construction clearance height is limited, the steel sheet piles can be divided into several sections along the longitudinal direction, and the sections are fixedly connected in sequence along the vertical direction, and driven in and out in sections during construction. Among them, the longitudinal direction of the steel sheet pile is the vertical direction during the use of the steel sheet pile.

[0003] At present, steel sheet pile segments are generally connected in the longitudinal direction by welding. For example, the patent with the authorization announcement number CN218263950 U discloses a steel sheet pile cofferdam suitable for deep buried foundations in weak covering layers. The whole Larsen steel sheet pile is composed of several segments, and each segment of Larsen steel sheet pile is longitudinally connected by several connecting members, so that the length of the whole Larsen steel sheet pile can meet the depth of the ultra-deep foundation pit, and the connecting members are welded to the adjacent two segments of Larsen steel sheet pile. The steel sheet pile segments are connected in the longitudinal direction by welding, which has the following disadvantages: first, the welding materials matching the steel sheet pile parent material are expensive, resulting in increased construction costs; second, the weld is a weak part, and the joint part is easily deformed or even broken during the steel sheet pile driving process; third, welding will lead to a decrease in the strength of the steel sheet pile and a shortened service life. The weld will also increase the contact area between the joint part and the soil, resulting in increased resistance when the steel sheet pile is driven in and out.

[0004] The patent with the authorization announcement number CN2931576Y discloses a bent steel sheet pile. In order to facilitate the longitudinal extension connection, two connecting plates are welded on one end of the pile body. Both connecting plates have a hole. The other end of the pile body also has a hole corresponding to the hole on the connecting plate, so that multiple steel sheet piles can be connected together longitudinally with bolts. This patent realizes the longitudinal extension of the steel sheet pile through connecting plates and bolts, but the hole of the connecting plate is not easy to align with the hole of the pile body, making it difficult to insert the bolt; in addition, the connection strength of the connecting plate and the bolt is poor, and the connection part is easy to deform after being stressed. Summary of the invention

[0005] The invention provides a steel sheet pile connection structure, the purpose of which is to improve the strength and rigidity of the joint parts where steel sheet pile sections are vertically connected, and to reduce the deformation of the steel sheet piles during construction and use.

[0006] The technical solution adopted by the present invention is: a steel sheet pile connection structure, wherein adjacent steel sheet pile sections are connected in the longitudinal direction by a plug-in connector, and adjacent steel sheet pile sections are connected in the transverse direction by a lock. The longitudinal direction of the steel sheet pile section is the vertical direction during construction, and the transverse direction of the steel sheet pile section is the extension direction of the steel sheet pile in the horizontal plane during construction. The steel sheet pile section includes a web and wing plates on both sides of the web, and the edges of the two wing plates are respectively provided with locks that match each other, and the locks are arranged along the longitudinal direction of the steel sheet pile section, and the steel sheet pile section is in a ﹝ shape on any cross section perpendicular to the longitudinal direction of the steel sheet pile section. The plug-in connector includes two baffles and a locking member located between the two baffles. A connecting portion is provided between the two baffles and connects them into a whole, and the connecting portion divides the gap between the two baffles into an upper slot and a lower slot; the shape of the upper slot is consistent with the shape of the lower end of the steel sheet pile segment along the longitudinal direction, the lower end of the steel sheet pile segment at the upper part of the connector is inserted into the upper slot and abuts against the connecting portion, the lower end of the steel sheet pile segment at the upper part of the connector is fixedly connected to the connector, the shape of the lower slot is consistent with the shape of the upper end of the steel sheet pile segment along the longitudinal direction, the upper end of the steel sheet pile segment at the lower part of the connector is inserted into the lower slot and abuts against the connecting portion, and the upper end of the steel sheet pile segment at the lower part of the connector is fixedly connected to the connector.

[0007] In order to ensure the overall strength and rigidity of the steel sheet pile, further: two adjacent connectors in the horizontal direction are arranged at staggered heights.

[0008] In order to reduce the influence of the upper and lower ends of the connector on driving in and pulling out the steel sheet pile section, further: the upper and lower end surfaces of the two baffles of the connector are both beveled surfaces.

[0009] The upper slot and the lower slot of the connector are preferably the same so that they can be used interchangeably. Specifically: the connecting portion is arranged in the horizontal direction, the connector is H-shaped in a vertical section perpendicular to the baffle, and the shape of the upper slot is the same as that of the lower slot.

[0010] The lower end of the steel sheet pile section can be fully inserted into the upper slot or only partially inserted into the upper slot, and the upper end of the steel sheet pile section can be fully inserted into the lower slot or only partially inserted into the lower slot. Furthermore, the shape of the upper slot is consistent with the shape of the web of the steel sheet pile segment, the web of the lower end of the steel sheet pile segment at the top of the connector is inserted into the upper slot and fixed by a fixing member that passes through the baffle and the steel sheet pile segment; or, the shape of the upper slot is consistent with the shape of the web of the steel sheet pile segment and at least one wing plate, the web of the lower end of the steel sheet pile segment at the top of the connector and at least one wing plate are inserted into the upper slot and fixed by a fixing member that passes through the baffle and the steel sheet pile segment; the shape of the lower slot is consistent with the shape of the web of the steel sheet pile segment, the web of the upper end of the steel sheet pile segment at the bottom of the connector is inserted into the lower slot and fixed by a fixing member that passes through the baffle and the steel sheet pile segment; or, the shape of the lower slot is consistent with the shape of the web of the steel sheet pile segment and at least one wing plate, the web of the upper end of the steel sheet pile segment at the bottom of the connector and at least one wing plate are inserted into the lower slot and fixed by a fixing member that passes through the baffle and the steel sheet pile segment.

[0011] The fixing piece is used to connect the plug-in piece with the steel sheet pile sections above and below it. Specifically, the fixing piece is a bolt or a plug. For example, the connection holes on any baffle of the plug-in piece are arranged in pairs, and a U-shaped plug is inserted into the connection holes of the same pair, and at least one end of the plug is provided with an elbow.

[0012] In order to reduce the influence of the pin on driving in and pulling out the steel sheet pile section, further: the pin is formed by bending a steel bar, and the plane corresponding to the pin is a vertical plane.

[0013] The beneficial effects of the present invention are as follows: in the vertical direction, adjacent steel sheet pile sections are connected by a plug connector, the lower end of the steel sheet pile section at the upper part of the plug connector is inserted into the upper slot, and the upper end of the steel sheet pile section at the lower part of the plug connector is inserted into the lower slot, the plug connector improves the strength and rigidity of the joint, reduces the deformation of the steel sheet pile during construction and use, and improves the rigidity, stability and safety of the steel sheet pile support structure. The lower end of the steel sheet pile section at the upper part of the plug connector abuts against the connecting part of the plug connector, and the upper end of the steel sheet pile section at the lower part of the plug connector abuts against the connecting part of the plug connector. When the steel sheet pile section is driven in, the vertical force of the steel sheet pile section on the plug connector directly acts on the connecting part of the plug connector, which is conducive to the transmission of the force, and the plug connector and the steel sheet pile section are also easy to fix.

[0014] The steel sheet pile segments are connected vertically by connectors, and the longitudinal dimension (height) of the steel sheet pile segments can be small, so that normal construction in clearance-restricted areas can be achieved, and the support efficiency and applicability of the steel sheet piles are improved. The steel sheet pile segments and connectors can be connected not only by welding, but also by mechanical connections that are easy to install and disassemble, so as to avoid the problem of strength reduction and shortened life of the steel sheet pile segments due to welding, which is conducive to increasing the number of cycles of the steel sheet pile segments and saving construction time and construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the connection between a connector and a steel sheet pile section below it in one embodiment of the present invention.

[0016] Reference numerals: steel sheet pile segment 1, web 1-1, wing plate 1-2, lock 1-3, connector 2, baffle 2-1, connecting portion 2-2. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Steel sheet piles are formed by connecting several steel sheet pile sections along the longitudinal and transverse directions of the steel sheet pile sections. Figure 1 As shown, in the steel sheet pile connection structure of the present invention, adjacent steel sheet pile segments 1 are connected in the longitudinal direction by connectors 2, and adjacent steel sheet pile segments 1 are connected in the transverse direction by locks 1-3. Among them, the longitudinal direction of the steel sheet pile segment 1 is the vertical direction during construction, the transverse direction of the steel sheet pile segment 1 is the extension direction of the steel sheet pile in the horizontal plane during construction, and the transverse and longitudinal directions of the steel sheet pile segment 1 are perpendicular to each other. In order to ensure the overall strength and rigidity of the steel sheet pile, two adjacent connectors 2 are arranged at staggered heights in the horizontal direction. The steel sheet pile segment 1 includes a web 1-1 and wing plates 1-2 on both sides of the web 1-1. The edges of the two wing plates 1-2 are respectively provided with locks 1-3 that match each other, and the locks 1-3 are arranged along the longitudinal direction of the steel sheet pile segment 1. The steel sheet pile segment 1 is in a ﹝ shape on any cross section perpendicular to the longitudinal direction of the steel sheet pile segment 1. The web 1-1, wing plate 1-2 and lock 1-3 of the steel sheet pile segment 1 are obtained by bending the steel plate as a whole. The lock 1-3 is hook-shaped in the cross section perpendicular to the longitudinal direction of the steel sheet pile segment 1. Adjacent steel sheet pile segments 1 are connected in the transverse direction by embedding the lock 1-3 into another adjacent lock 1-1.

[0019] The plug-in connector 2 includes two baffles 2-1 and a connecting portion 2-2 located between the two baffles 2-1 and connecting the two baffles 2-1 as a whole. The connecting portion 2-2 divides the gap between the two baffles 2-1 into an upper slot and a lower slot. The two baffles 2-1 and the connecting portion 2-2 can be a whole formed by cutting, or a whole formed by mechanical connection. In order to reduce the influence of the upper and lower ends of the plug-in connector 2 on the driving and pulling out of the steel sheet pile segment 1, the upper and lower end surfaces of the two baffles 2-1 of the plug-in connector 2 are both beveled surfaces, and the beveled surfaces and the steel sheet pile segment 1 are transitioned by an obtuse angle.

[0020] The shape of the upper slot is consistent with the shape of the lower end of the steel sheet pile segment 1 along the longitudinal direction. The lower end of the steel sheet pile segment 1 at the upper part of the connector 2 is inserted into the upper slot and abuts against the connecting part 2-2. The lower end of the steel sheet pile segment 1 abuts against the connecting part 2-2, which not only facilitates the accurate positioning of the two, but also facilitates the transmission of force between the two when the steel sheet pile segment 1 is inserted. The lower end of the steel sheet pile segment 1 at the upper part of the connector 2 is fixedly connected to the connector 2, so that the steel sheet pile segment 1 can transmit vertical tension, which is convenient for the steel sheet pile segment 1 to be pulled out. The shape of the lower slot is consistent with the shape of the upper end of the steel sheet pile segment 1 along the longitudinal direction. The upper end of the steel sheet pile segment 1 at the lower part of the connector 2 is inserted into the lower slot and abuts against the connecting part 2-2. The upper end of the steel sheet pile segment 1 abuts against the connecting part 2-2, which not only facilitates the accurate positioning of the two, but also facilitates the transmission of force between the two when the steel sheet pile segment 1 is inserted. The upper end of the steel sheet pile segment 1 at the lower part of the connector 2 is fixedly connected to the connector 2, so that the steel sheet pile segment 1 can transmit vertical pulling force, which is convenient for pulling out the steel sheet pile segment 1. The net distance between the two baffles 2-1 at the upper slot is the thickness of the upper slot, and the thickness of the upper slot is consistent with the thickness of the lower end of the steel sheet pile segment 1 along the longitudinal direction. The net distance between the two baffles 2-1 at the lower slot is the thickness of the lower slot, and the thickness of the lower slot is consistent with the thickness of the lower end of the steel sheet pile segment 1 along the longitudinal direction. The upper and lower ends of the steel sheet pile segment 1 along the longitudinal direction generally have the same thickness and the same shape, so the thickness of the upper slot is consistent with the thickness of the lower slot. The upper slot and the lower slot of the connector 2 are preferably the same so that they can be used interchangeably. See Figure 1 The connecting portion 2-2 is arranged in the horizontal direction, the connector 2 is H-shaped in a vertical section perpendicular to the baffle 2-1, the shape of the upper slot is the same as the shape of the lower slot, and the upper slot and the lower slot can be used interchangeably.

[0021] The lower end of the steel sheet pile section 1 can be fully inserted into the upper slot, that is, the web 1-1 and the wing plates 1-2 on both sides of the web 1-1 are inserted into the upper slot, or only partially inserted into the upper slot, that is, one or two of the three plates (one web 1-1 and two wing plates 1-2) are inserted into the upper slot. The upper end of the steel sheet pile section 1 can be fully inserted into the lower slot, that is, the web 1-1 and the wing plates 1-2 on both sides of the web 1-1 are inserted into the lower slot, or only partially inserted into the lower slot, that is, one or two of the three plates (one web 1-1 and two wing plates 1-2) are inserted into the lower slot.

[0022] In order to ensure that the connector 2 and the steel sheet pile segments 1 above and below it are accurately positioned and firmly connected, the shape of the upper slot is consistent with the shape of the web 1-1 of the steel sheet pile segment 1, and the web 1-1 at the lower end of the steel sheet pile segment 1 at the upper part of the connector 2 is inserted into the upper slot and fixed by a fixing member that penetrates the baffle 2-1 and the steel sheet pile segment 1. Alternatively, the shape of the upper slot is consistent with the shape of the web 1-1 and at least one wing 1-2 of the steel sheet pile segment 1, and the web 1-1 and at least one wing 1-2 at the lower end of the steel sheet pile segment 1 at the upper part of the connector 2 are inserted into the upper slot and fixed by a fixing member that penetrates the baffle 2-1 and the steel sheet pile segment 1. Correspondingly, the shape of the lower slot is consistent with the shape of the web 1-1 of the steel sheet pile segment 1, and the web 1-1 at the upper end of the steel sheet pile segment 1 at the lower part of the connector 2 is inserted into the lower slot and fixed by a fixing member that penetrates the baffle 2-1 and the steel sheet pile segment 1. Alternatively, the shape of the lower slot is consistent with the shape of the web 1-1 and at least one wing plate 1-2 of the steel sheet pile segment 1, and the web 1-1 and at least one wing plate 1-2 at the upper end of the steel sheet pile segment 1 at the lower part of the connector 2 are inserted into the lower slot and fixed by a fixing member that penetrates the baffle 2-1 and the steel sheet pile segment 1.

[0023] The fixing part is used to connect the plug-in component 2 with the steel sheet pile segments 1 above and below it, and is removed when the steel sheet pile segment 1 is pulled out. For example, the fixing part is a bolt or a latch. In order to achieve the installation of the fixing part, the baffle 2-1 and the steel sheet pile segment 1 are provided with connecting holes that adapt to each other. The connecting holes of the two baffles 2-1 and the connecting holes of the steel sheet pile segment 1 are aligned to form a fixing hole. Each fixing hole can be equipped with an independent fixing part, or two or more fixing holes can be equipped with a fixing part. For example, the connecting holes on any baffle 2-1 of the plug-in component 2 are arranged in pairs, each pair is two, and a U-shaped latch is inserted into the two connecting holes of the same pair. At least one end of the latch is provided with an elbow, and the elbow is used to prevent the latch from slipping out. In order to reduce the influence of the latch on the driving in and out of the steel sheet pile segment 1, the plane corresponding to the latch is a vertical plane. The pin can be formed by bending steel bars during construction, for example, HPB300 smooth round steel bars. The diameter and shape of the pin match the diameter and position of the fixing hole. The length of the pin is appropriate to ensure that the connector 2 and the steel sheet pile segment 1 are effectively fixed, while the convenience of installation and removal must be considered.

[0024] During construction, first drive the steel sheet pile segment 1 of the lower layer, and control the upper end of the steel sheet pile segment 1 to have a certain height from the ground to facilitate the connection of the connector 2; secondly, install the connector 2 on the top of the steel sheet pile segment 1 of the lower layer, insert the upper end of the steel sheet pile segment 1 into the lower slot of the connector 2, and fix the steel sheet pile segment 1 and the connector 2 of the lower layer through the fixing piece; thirdly, insert the steel sheet pile segment 1 of the upper layer into the upper slot of the connector 2, and connect the steel sheet pile segment 1 with the completed steel sheet pile segment 1 in the horizontal direction through the lock 1-3, and fix the steel sheet pile segment 1 and the connector 2 of the upper layer through the fixing piece; finally, repeat the above process as needed until the steel sheet pile segment 1 reaches the designed depth. In order to enhance the overall rigidity of the joint corresponding to the connector 2, longitudinal purlins and internal supports can also be set at the joint.

[0025] Continue to repeat the steel sheet pile segments 1 according to the above method, and connect adjacent steel sheet pile segments 1 in the horizontal direction through the lock 1-3 embedded in another adjacent lock 1-1, and connect adjacent steel sheet pile segments 1 in the vertical direction through the plug connector 2 and the fixing part. In the horizontal direction, the two adjacent plug connectors 2 are arranged at staggered heights to avoid being at the same height. After the foundation pit is backfilled, the steel sheet pile segments 1 are pulled out section by section until all the steel sheet pile segments 1 are pulled out. The steel sheet pile segments 1 and the plug connectors 2 can be recycled and reused, and the fixing parts can be recycled and reused depending on the wear condition.

Claims

1. A steel sheet pile connection structure, wherein adjacent steel sheet pile sections (1) are connected in the longitudinal direction by a plug-in connector (2), and adjacent steel sheet pile sections (1) are connected in the transverse direction by a locking mouth (1-3), wherein the longitudinal direction of the steel sheet pile section (1) is the vertical direction during construction, and the transverse direction of the steel sheet pile section (1) is the extension direction of the steel sheet pile in the horizontal plane during construction; the steel sheet pile section (1) comprises a web (1-1) and wing plates (1-2) on both sides of the web (1-1), the edges of the two wing plates (1-2) are respectively provided with locking mouths (1-3) adapted to each other, and the locking mouths (1-3) are arranged along the longitudinal direction of the steel sheet pile section (1), and the steel sheet pile section (1) is in a shape of ﹝ on any cross section perpendicular to the longitudinal direction of the steel sheet pile section (1); and the characteristics are: The plug-in connector (2) comprises two baffles (2-1) and a connecting portion (2-2) located between the two baffles (2-1) and connecting the two baffles (2-1) into a whole; the connecting portion (2-2) divides the gap between the two baffles (2-1) into an upper slot and a lower slot; the shape of the upper slot is consistent with the shape of the lower end of the steel sheet pile segment (1) along the longitudinal direction; the lower end of the steel sheet pile segment (1) at the upper part of the plug-in connector (2) is inserted into the upper slot and abuts against the connecting portion (2-2); the lower end of the steel sheet pile segment (1) at the upper part of the plug-in connector (2) is fixedly connected to the plug-in connector (2); the shape of the lower slot is consistent with the shape of the upper end of the steel sheet pile segment (1) along the longitudinal direction; the upper end of the steel sheet pile segment (1) at the lower part of the plug-in connector (2) is inserted into the lower slot and abuts against the connecting portion (2-2); the upper end of the steel sheet pile segment (1) at the lower part of the plug-in connector (2) is fixedly connected to the plug-in connector (2).

2. The steel sheet pile connection structure according to claim 1, characterized in that: Two adjacent plug connectors (2) in the horizontal direction are arranged at staggered heights.

3. The steel sheet pile connection structure according to claim 1, characterized in that: The upper and lower end surfaces of the two baffles (2-1) of the plug connector (2) are both beveled surfaces.

4. The steel sheet pile connection structure according to claim 1, characterized in that: The connecting portion (2-2) is arranged in the horizontal direction, the plug connector (2) is in an H-shape in a vertical cross section perpendicular to the baffle (2-1), and the shape of the upper slot is the same as that of the lower slot.

5. The steel sheet pile connection structure according to any one of claims 1 to 4, characterized in that: The shape of the upper slot is consistent with the shape of the web (1-1) of the steel sheet pile segment (1), the web (1-1) at the lower end of the steel sheet pile segment (1) above the connector (2) is inserted into the upper slot and fixed by a fixing member penetrating the baffle (2-1) and the steel sheet pile segment (1); or, the shape of the upper slot is consistent with the shape of the web (1-1) and at least one wing plate (1-2) of the steel sheet pile segment (1), the web (1-1) at the lower end of the steel sheet pile segment (1) above the connector (2) and at least one wing plate (1-2) are inserted into the upper slot and fixed by a fixing member penetrating the baffle (2-1) and the steel sheet pile segment (1); The shape of the lower slot is consistent with the shape of the web (1-1) of the steel sheet pile segment (1), the web (1-1) at the upper end of the steel sheet pile segment (1) at the lower part of the connector (2) is inserted into the lower slot and fixed by a fixing member penetrating the baffle (2-1) and the steel sheet pile segment (1); or, the shape of the lower slot is consistent with the shape of the web (1-1) and at least one wing plate (1-2) of the steel sheet pile segment (1), the web (1-1) at the upper end of the steel sheet pile segment (1) at the lower part of the connector (2) and at least one wing plate (1-2) are inserted into the lower slot and fixed by a fixing member penetrating the baffle (2-1) and the steel sheet pile segment (1).

6. The steel sheet pile connection structure according to claim 5, characterized in that: The fixing parts are bolts or latches.

7. The steel sheet pile connection structure according to claim 6, characterized in that: The connection holes on any baffle (2-1) of the plug connector (2) are arranged in pairs, and U-shaped plug pins are inserted into the connection holes of the same pair, and at least one end of the plug pin is provided with an elbow.

8. The steel sheet pile connection structure according to claim 7, characterized in that: The pin is formed by bending a steel bar, and the plane corresponding to the pin is a vertical plane.

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