A steel sheet pile construction system and construction method for a foundation pit

Abstract

The application relates to a steel sheet pile construction system and a construction method for a foundation pit. One end of the steel sheet pile is provided with a first plug joint, and the other end is provided with a second plug joint for plugging with the first plug joint of another steel sheet pile. The steel sheet pile construction system comprises at least two steel pipe piles and two laser emitters. The first plug joint and the second plug joint are arranged on the steel pipe pile in the circumferential direction at intervals. At least one of the steel pipe piles is provided with two mounting positions. The two laser emitters are arranged on the two mounting positions of the steel pipe pile respectively, and emit two parallel lasers towards another steel pipe pile adjacent to the steel pipe pile to hit the other steel pipe pile. In the steel sheet pile construction process, the laser emitters detect whether the steel sheet pile installation deviates, and the deviation can be corrected in time.

Description

Technical Field

[0001] This application relates to the field of foundation pit support, and in particular to a steel sheet pile construction system and construction method for foundation pits. Background Technology

[0002] In recent years, with the acceleration of urbanization and the increasing development and utilization of underground space, land is becoming increasingly scarce, foundation pits are getting deeper, and the construction space for support structures is becoming more limited, thus placing higher demands on support structures. Existing sheet piles cannot detect deviations in a timely manner during construction, and correcting these deviations after they are discovered will affect the construction progress. Summary of the Invention

[0003] This application provides a steel sheet pile construction system and method for foundation pits, in order to solve the problem in related technologies that deviations in steel sheet piles cannot be detected in a timely manner during construction.

[0004] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a system for constructing sheet piles in a foundation pit is provided. One end of the sheet pile is provided with a first connector, and the other end is provided with a second connector for connecting to the first connector of another sheet pile. The system includes at least two steel pipe piles and two laser emitters. The first connector and the second connector are spaced apart along the circumference of each steel pipe pile, and at least one of the steel pipe piles has two installation positions. The two laser emitters are respectively installed at the two installation positions of the steel pipe piles and emit two parallel laser beams toward another steel pipe pile adjacent to the first steel pipe pile to strike the second steel pipe pile.

[0005] In some embodiments, the central angle of the first and second connectors on the steel pipe pile is 90° or 180°.

[0006] In some embodiments, the steel pipe pile includes: a central pipe, a circular pipe segment, and an arc-shaped pipe segment. The central pipe is provided with a first fixing member; the circular pipe segment is rotatably fitted onto the central pipe and detachably connected to the central pipe through the first fixing member; the arc-shaped pipe segment is rotatably fitted onto the central pipe and detachably connected to the top end of the circular pipe segment through a second fixing member; and the steel pipe pile has a first connector and a second connector, one of which is located on the circular pipe segment and the other is located on the arc-shaped pipe segment.

[0007] In some embodiments, the circular tube segment includes a first circular inner tube and a circular outer tube, with the outer wall of the first circular inner tube and the inner wall of the circular outer tube connected by a diaphragm, and the first circular inner tube sleeved on the central tube.

[0008] In some embodiments, the arc-shaped pipe section includes a second circular inner pipe and an arc-shaped outer pipe. The outer wall of the second circular inner pipe is connected to the inner wall of the arc-shaped outer pipe through a transverse partition, and the second circular inner pipe is sleeved on the central pipe.

[0009] In some embodiments, the first fixing member is an arc-shaped pipe. One side of the first fixing member is fixed to the central pipe, and the other side is detachably connected to the circular pipe section.

[0010] In some embodiments, the second fixing member includes a fixing hole and a fixing bolt. The fixing hole is formed on the arc-shaped pipe section and the circular pipe section; the fixing bolt is threadedly connected to the fixing hole.

[0011] In some embodiments, the first socket joint is of a T-shaped structure, the second socket joint is of a "mouth" - shaped structure, and a notch for the first socket joint to pass through is formed at one end of the second socket joint.

[0012] In some embodiments, the system further includes a pressure sensor, an alarm, and a receiving device. The pressure sensor is used to be arranged on the steel pipe pile to detect pressure; the receiving device is connected to the pressure sensor and the alarm, and is used to compare the pressure detected by the pressure sensor with a pressure threshold value, and when the pressure exceeds the pressure threshold value, control the alarm to give an alarm.

[0013] In a second aspect, a construction method for steel sheet piles for a foundation pit is provided, which includes the following steps: providing the system for steel sheet pile construction for a foundation pit as described above; driving the steel pipe piles at the positions where the steel pipe piles are to be driven; respectively installing two laser emitters at two installation positions of the steel pipe piles; installing the steel sheet piles; emitting two parallel lasers towards another steel pipe pile; if the lasers hit the steel sheet piles, adjust the steel sheet piles until the lasers hit another steel pipe pile.

[0014] The beneficial effects brought by the technical solutions provided in this application include:

[0015] The embodiments of this application provide a steel sheet pile construction system and a construction method for a foundation pit. During the construction process of the steel sheet piles, whether there is a deviation in the installation of the steel sheet piles can be detected by the laser emitters, and the deviation that appears can be corrected in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a front sectional view structural schematic diagram of the steel pipe pile provided by the embodiment of this application;

[0018] Figure 2 Top views of steel pipe piles and a first type of steel sheet pile provided in the embodiments of this application;

[0019] Figure 3 Top view of a steel pipe pile and a second type of steel sheet pile provided in the embodiments of this application;

[0020] Figure 4 A top view of the circular outer tube provided in an embodiment of this application;

[0021] Figure 5 A flowchart illustrating the construction method of sheet piles for foundation pits provided in this application embodiment.

[0022] In the diagram: 1. Steel pipe pile; 10. Central pipe; 11. First fixing component; 12. Circular pipe section; 120. First circular inner pipe; 121. Circular outer pipe; 13. Arc-shaped pipe section; 130. Second circular inner pipe; 131. Arc-shaped outer pipe; 14. Second fixing component; 140. Fixing bolt; 141. Fixing hole; 15. Transverse diaphragm; 2. Steel sheet pile; 3. Laser emitter; 4. Pressure sensor; 5. First connector; 6. Second connector. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] See Figures 1 to 5 This application provides a steel sheet pile construction system and method for foundation pits, which can solve the problem in related technologies that deviations in steel sheet piles cannot be detected in time during construction.

[0025] In a first aspect, embodiments of this application provide a system for constructing sheet piles in a foundation pit. One end of the sheet pile 2 is provided with a first connector 5, and the other end is provided with a second connector 6 for connecting to the first connector 5 of another sheet pile 2. The system includes at least two steel pipe piles 1 and two laser emitters 3. The first connector 5 and the second connector 6 are provided at intervals along the circumference of the steel pipe pile 1. At least one of the steel pipe piles 1 has two installation positions. The two laser emitters 3 are respectively installed at the two installation positions of the steel pipe pile 1 and emit two parallel lasers toward another steel pipe pile 1 adjacent to the first steel pipe pile 1 to hit the other steel pipe pile 1.

[0026] This application uses a laser emitter 3 to detect whether there are any deviations in the installation of the steel sheet pile 2 during the construction process, and can correct any deviations in a timely manner.

[0027] like Figure 2 and Figure 3 As shown, the steel pipe pile 1 is connected to the steel sheet pile 2 through the first connector 5 and the second connector 6.

[0028] In some embodiments, the first connector 5 and the second connector 6 on the steel pipe pile 1 can be adjusted in position to accommodate steel sheet piles 2 installed in different orientations. That is, the central angle of the first connector 5 and the second connector 6 is variable, and the first connector 5 and the second connector 6 on the steel pipe pile 1 can be adjusted arbitrarily. In this embodiment, by adjusting the position of the first connector 5 and the second connector 6 on the steel pipe pile 1, the applicability of the steel pipe pile 1 is made wider.

[0029] In some other embodiments, the positions of the first connector 5 and the second connector 6 on the steel pipe pile 1 cannot be adjusted, that is, the central angle of the first connector 5 and the second connector 6 is a fixed value. For example, the central angle of the first connector 5 and the second connector 6 on the steel pipe pile 1 is 90° or 180°. In this embodiment, when the steel sheet pile 2 is constructed, it is necessary to prepare a variety of steel pipe piles 1 in advance according to the actual situation, and the positions of the first connector 5 and the second connector 6 on different steel pipe piles 1 are different.

[0030] The above embodiments are merely various possible implementations of the embodiments of this application. The embodiments of this application are not limited thereto. In other possible implementations, the first connector 5 and the second connector 6 on the steel pipe pile 1 can be set in one of the adjustable ways to realize the installation of steel sheet piles 2 at different positions on the steel pipe pile 1.

[0031] The installation position on the steel pipe pile 1 is used to install the laser emitter 3. The steel sheet pile 2 has different structural forms, and the laser emitted by the laser emitter 3 needs to be perpendicular to the width extension direction of the steel sheet pile 2.

[0032] In some embodiments, such as Figure 2The sheet piles 2 shown are arranged in groups of two with openings facing different directions. When the two laser emitters 3 emit lasers, the distance between the two lasers is greater than the width of the sheet pile group. The sheet pile group is located between the two lasers and does not contact them, indicating that there is no deviation in the construction of the sheet piles 2. Specifically, when the laser emitter 3 on one steel pipe pile 1 emits a laser towards another steel pipe pile 1 adjacent to it, so that the two parallel lasers hit the other steel pipe pile 1, there is no deviation in the construction of the sheet piles 2. When the laser emitter 3 on one steel pipe pile 1 emits a laser towards another steel pipe pile 1 adjacent to it, and at least one of the two parallel lasers does not hit the other steel pipe pile 1, it indicates that there is a deviation in the construction of the sheet piles 2. At this time, it is necessary to adjust the position of the sheet piles 2 in time so that the two parallel lasers hit the other steel pipe pile 1.

[0033] In other embodiments, such as Figure 3 As shown in the diagram, when the two laser emitters 3 emit lasers, the distance between the two lasers is greater than the width of the sheet pile 2. The sheet pile 2 is located between the two lasers and does not come into contact with them, indicating that there was no deviation in the construction of the sheet pile 2.

[0034] For ease of detection, the system also includes an alarm. A laser receiver can be installed on another steel pipe pile 1. The laser receiver is connected to the alarm. The installation position of the laser receiver on the steel pipe pile 1 corresponds to the installation position of the laser transmitter 3 on the adjacent steel pipe pile 1. When the laser receiver does not receive the laser signal emitted by the laser transmitter 3, the alarm will sound, reminding the construction personnel to adjust the position of the steel sheet pile 2 in time.

[0035] To broaden the applicability of the steel pipe pile 1, the steel pipe pile 1 includes: a central pipe 10, a circular pipe section 12, and an arc-shaped pipe section 13. The central pipe 10 is provided with a first fixing member 11. The circular pipe section 12 is rotatably fitted onto the central pipe 10 and is detachably connected to the central pipe 10 through the first fixing member 11. The arc-shaped pipe section 13 is rotatably fitted onto the central pipe 10 and is detachably connected to the top end of the circular pipe section 12 through a second fixing member 14. The steel pipe pile 1 has a first connector 5 and a second connector 6, one of which is located on the circular pipe section 12 and the other is located on the arc-shaped pipe section 13.

[0036] The positions of the first connector 5 and the second connector 6 on the steel pipe pile 1 can be adjusted, that is, the central angle of the first connector 5 and the second connector 6 is variable.

[0037] The steel pipe pile 1 is connected to the steel sheet pile 2 through the first connector 5 and the second connector 6. One end of the steel sheet pile 2 is provided with the first connector 5, and the other end is provided with the second connector 6 for connecting with the first connector 5 of another steel sheet pile 2. Multiple steel sheet piles 2 are connected to each other through the first connector 5 and the second connector 6.

[0038] The first connector 5 and the second connector 6 can have different forms of appearance;

[0039] In some embodiments, the first connector 5 has a T-shaped structure, and the second connector 6 has a "U"-shaped structure, with a notch at one end of the second connector 6 for the first connector 5 to pass through. If the second connector 6 is located inside the circular pipe section 12 or the arc-shaped pipe section 13, a notch is provided on the circular pipe section 12 or the arc-shaped pipe section 13 for the first connector 5 to pass through.

[0040] In other embodiments, the first connector 5 has a circular radial cross-section, and the second connector 6 has a C-shaped structure.

[0041] The above embodiments are merely various possible implementations of the embodiments of this application, and the embodiments of this application are not limited thereto.

[0042] Before driving the steel pipe pile 1, first adjust the positions of the first connector 5 and the second connector 6 on the steel pipe pile 1 according to the installation position of the steel sheet pile 2. During the adjustment, rotate the round pipe section 12 and / or the arc-shaped pipe section 13. After the adjustment is completed, fix the round pipe section 12 and the arc-shaped pipe section 13. At this time, the central pipe 10, the round pipe section 12, and the arc-shaped pipe section 13 are fixed as a whole. When driving the steel pipe pile 1, the various parts on the steel pipe pile 1 will not rotate.

[0043] Specifically, the circular pipe segment 12 includes a first circular inner pipe 120 and a circular outer pipe 121. The outer wall of the first circular inner pipe 120 and the inner wall of the circular outer pipe 121 are connected by a transverse partition 15. The first circular inner pipe 120 is sleeved on the central pipe 10. The arc-shaped pipe segment 13 includes a second circular inner pipe 130 and an arc-shaped outer pipe 131. The outer wall of the second circular inner pipe 130 and the inner wall of the arc-shaped outer pipe 131 are connected by a transverse partition 15. The second circular inner pipe 130 is sleeved on the central pipe 10. The radial cross-section of the arc-shaped outer pipe 131 can be semi-circular, circular, or any other arbitrary shape.

[0044] The first circular inner tube 120 and the second circular inner tube 130 are rotatably connected to the central tube 10. A cutting edge is provided at the bottom end of the transverse diaphragm 15, so that the thickness of the bottom end of the transverse diaphragm 15 is less than the thickness of the top end of the transverse diaphragm 15. When the steel pipe pile 1 is driven, the transverse diaphragm 15 can cut the soil, making it easier to drive the steel pipe pile 1 and thus improving the efficiency of driving the steel pipe pile 1. A soil accommodating space is formed between the first circular inner tube 120 and the circular outer tube 121, and between the second circular inner tube 130 and the arc-shaped outer tube 131. The setting of this structure increases the contact area between the steel pipe pile 1 and the soil, making the steel pipe pile 1 more stable after being inserted into the soil. The bottom end of the central tube 10 is set as a pointed tip, which facilitates the insertion of the steel pipe pile 1 into the soil.

[0045] In some embodiments, the first fixing member 11 is an arc-shaped tube, and the radial cross section of the first fixing member 11 can be a semi-circle. One side of the first fixing member 11 is fixed to the central tube 10, and the other side is detachably connected to the circular tube segment 12. In other embodiments, the first fixing member 11 can be of other shapes. It is necessary to ensure that one side of the first fixing member 11 is fixedly connected to the central tube 10, and the other end is used to contact the circular tube segment 12 and fix the circular tube segment 12.

[0046] There are multiple ways to fix the circular pipe section 12 and the arc-shaped pipe section 13.

[0047] In some embodiments, the circular pipe segment 12 and the arc-shaped pipe segment 13 are fixed by a second fixing member 14. The second fixing member 14 includes fixing holes 141 and fixing bolts 140. Multiple fixing holes 141 are provided on the first fixing member 11 and the arc-shaped outer pipe 131. Multiple fixing holes 141 are also provided on the surface of the circular outer pipe 121 near the first fixing member 11 and the arc-shaped outer pipe 131. The fixing holes 141 on the first fixing member 11 correspond to the fixing holes 141 on the surface of the circular outer pipe 121 near the first fixing member 11. The fixing holes 141 on the arc-shaped outer pipe 131 correspond to the fixing holes 141 on the surface of the circular outer pipe 121 near the arc-shaped outer pipe 131. The fixing holes 141 at different locations are connected by fixing bolts 140. That is, after the fixing holes 141 and the fixing bolts 140 are threadedly connected, the circular pipe segment 12 and the arc-shaped pipe segment 13 are fixed.

[0048] In other embodiments, the first fixing member 11 has a semi-circular radial cross-section, and a first threaded groove is formed on the inner wall of the first fixing member 11. A second threaded groove is formed on the surface of the circular outer tube 121. While the first circular inner tube 120 is rotatably connected to the central tube 10, the first circular inner tube 120 can also slide up and down along the axial direction of the central tube 10. When the circular outer tube 121 rotates clockwise, the first circular inner tube 120 slides down. The circular outer tube 121 and the first fixing member 11 are tightened and fixed by the threaded connection of the first threaded groove and the second threaded groove. When the circular outer tube 121 rotates counterclockwise, the first circular inner tube 120 moves upward, and the circular outer tube 121... 1. Separate from the first fixing member 11; the surface of the circular outer tube 121 is also provided with a third threaded groove, and the inner wall of the arc-shaped outer tube 131 is provided with a fourth threaded groove. While the second circular inner tube 130 is rotatably connected to the central tube 10, the second circular inner tube 130 can also slide up and down along the axial direction of the central tube 10. When the arc-shaped outer tube 131 rotates forward, the second circular inner tube 130 slides down. The arc-shaped outer tube 131 and the circular outer tube 121 are tightened and fixed by the threaded connection of the third threaded groove and the fourth threaded groove. When the arc-shaped outer tube 131 rotates in reverse, the second circular inner tube 130 moves upward, and the arc-shaped outer tube 131 and the circular outer tube 121 separate.

[0049] In order to detect whether the steel pipe pile 1 is tilted during the construction of the steel sheet pile 2, the system also includes a pressure sensor 4 and a receiving device. The pressure sensor 4 is used to be installed on the steel pipe pile 1 to detect pressure. The receiving device is connected to the pressure sensor 4 and the alarm, and is used to compare the pressure detected by the pressure sensor 4 with the pressure threshold. When the pressure threshold is exceeded, the alarm is activated.

[0050] Specifically, pressure sensor 4 is installed at the point where the surface of the steel pipe pile 1 contacts the soil. A pressure threshold is set. After the steel pipe pile 1 is inserted into the soil, if the installation of the steel sheet pile 2 causes the steel pipe pile 1 to tilt, pressure sensor 4 will detect fluctuations in the pressure of the soil on the steel pipe pile 1 and transmit the pressure value to the receiving device. The receiving device compares the received pressure value with the pressure threshold. When the pressure detected by pressure sensor 4 exceeds the pressure threshold, it indicates that the steel pipe pile 1 is tilted. The receiving device will then trigger an alarm, allowing construction personnel to correct the tilted steel pipe pile 1 in a timely manner.

[0051] Secondly, this application provides a method for constructing sheet piles for foundation pits, comprising the following steps: providing the above-mentioned system for constructing sheet piles for foundation pits; then, driving the sheet pile 1 into the driving position; installing two laser emitters 3 at two installation positions of the sheet pile 1 respectively; the sheet pile 1 emits two parallel lasers toward the other sheet pile 1; when installing the sheet pile 2, if the laser hits the sheet pile 2, the sheet pile 2 is adjusted until the laser hits the other sheet pile 1; when installing the sheet pile 2, if the installation of the sheet pile 2 causes the sheet pile 1 to tilt, the pressure sensor 4 will detect fluctuations in the pressure of the soil on the sheet pile 1 and transmit the pressure value to the receiving device; the receiving device compares the received pressure value with a pressure threshold; when the pressure detected by the pressure sensor 4 exceeds the pressure threshold, it indicates that the sheet pile 1 has tilted, and the receiving device controls the alarm to sound.

[0052] This application can detect whether there is a deviation in the installation of the steel sheet pile 2 during the construction of the steel sheet pile 2 using a laser emitter 3, and can correct the deviation in a timely manner; it can also determine whether the steel pipe pile 1 is tilted when installing the steel sheet pile 2, and can correct the tilted steel pipe pile 1 in a timely manner.

[0053] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0054] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A system for constructing sheet piles in a foundation pit, wherein one end of the sheet pile (2) is provided with a first connector (5) and the other end is provided with a second connector (6) for connecting with the first connector (5) of another sheet pile (2), characterized in that, It includes: At least two steel pipe piles (1), on which first socket joints (5) and second socket joints (6) are arranged at intervals along the circumferential direction thereof, and at least one of the steel pipe piles (1) has two installation positions; And two laser emitters (3), which are used to be respectively installed at the two installation positions of the steel pipe pile (1) and emit two parallel lasers towards another steel pipe pile (1) adjacent to the steel pipe pile (1) to hit on the other steel pipe pile (1); The steel pipe pile (1) includes: A central pipe (10), on which a first fixing member (11) is arranged; A circular pipe section (12), which is rotatably sleeved on the central pipe (10) and is detachably connected to the central pipe (10) through the first fixing member (11); An arc-shaped pipe section (13), which is rotatably sleeved on the central pipe (10) and is detachably connected to the top end of the circular pipe section (12) through a second fixing member (14); And the first socket joint (5) and the second socket joint (6) on the steel pipe pile (1), one of which is located on the circular pipe section (12) and the other is located on the arc-shaped pipe section (13); [[ID=۸]]The circular pipe section (12) includes a first circular inner pipe (120) and a circular outer pipe (121), and the outer wall of the first circular inner pipe (120) is connected to the inner wall of the circular outer pipe (121) through a transverse partition plate (15), and the first circular inner pipe (120) is sleeved on the central pipe (10); The arc-shaped pipe section (13) includes a second circular inner pipe (130) and an arc-shaped outer pipe (131), and the outer wall of the second circular inner pipe (130) is connected to the inner wall of the arc-shaped outer pipe (131) through a transverse partition plate (15), and the second circular inner pipe (130) is sleeved on the central pipe (10); The system further includes a pressure sensor (4), an alarm and a receiving device. The pressure sensor (4) is used to be arranged on the steel pipe pile (1) to detect pressure; The receiving device is connected to the pressure sensor (4) and the alarm, and is used to compare the pressure detected by the pressure sensor (4) received with a pressure threshold value, and when it exceeds the pressure threshold value, control the alarm to give an alarm.

2. The system for constructing steel sheet piles for foundation pits according to claim 1, wherein: The central angles of the first socket joint (5) and the second socket joint (6) on the steel pipe pile (1) are 90° or 180°.

3. The system for steel sheet pile construction in foundation pits as described in claim 1, characterized in that: The first fixing member (11) is an arc-shaped pipe, one side of the first fixing member (11) is fixed to the central pipe (10), and the other side is detachably connected to the circular pipe section (12).

4. The system for steel sheet pile construction in foundation pits as described in claim 1, characterized in that: The second fixing member (14) includes: A fixing hole (141), which is opened on the arc-shaped pipe section (13) and the circular pipe section (12); A fixing bolt (140), which is threadedly connected to the fixing hole (141).

5. The system for steel sheet pile construction of foundation pits as described in claim 1, characterized in that: The first socket joint (5) is of a T-shaped structure, the second socket joint (6) is of a "mouth" - shaped structure, and a notch for the first socket joint (5) to pass through is opened at one end of the second socket joint (6).

6. A method for constructing steel sheet piles for foundation pits, characterized in that, It includes the following steps: Provide the system for constructing steel sheet piles for foundation pits according to claim 1; At the position where the steel pipe piles are inserted and driven, insert and drive the steel pipe piles (1); Two laser emitters (3) are respectively installed at two installation positions on the steel pipe pile (1); Install steel sheet piles (2); Two parallel laser beams are emitted toward another steel pipe pile (1); If the laser hits the sheet pile (2), adjust the sheet pile (2) until the laser hits another steel pipe pile (1).

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