Building deep foundation pit excavation construction device and construction method

Abstract

The invention discloses a building deep foundation pit excavation construction device and method, the construction device comprises an excavator body, a positioning assembly and a stabilizing assembly, the excavator body is used for excavating earthwork in a foundation pit, the positioning assembly comprises a sensor and a receiver, the sensor is installed on the excavator body, and the receiver is installed on the excavator body. The sensor is used for sensing the depth of the excavator body in the foundation pit; the receiver is used for receiving data transmitted by the sensor; the stabilizing assembly comprises a plurality of supporting legs and ground feet installed on the supporting legs, the supporting legs are all installed on the excavator body, the ground feet are installed on the corresponding supporting legs in a telescopic mode, and the ends, away from the supporting legs, of the ground feet abut against earthwork at the bottom of the foundation pit. The excavator has the effect of improving the excavation precision and the excavation efficiency when a worker uses the excavator to excavate a foundation pit.

Description

Technical Field

[0001] The present invention relates to the field of foundation pit construction, and in particular to a construction device and a construction method for excavating a deep foundation pit of a building. Background Art In the current construction field, deep foundation pit excavation is a key construction step, and its efficiency and safety directly affect the overall project progress and quality. Traditionally, deep foundation pit excavation mainly relies on a combination of manual excavation and mechanical excavation. Although this method meets basic construction needs to a certain extent, its limitations are increasingly prominent when facing complex and changeable geological conditions.

[0002] Specifically, manual excavation is flexible but inefficient, and mechanical excavation (especially excavator-assisted operations) can increase excavation speed, but its excavation accuracy is highly dependent on the operator's skills and experience, resulting in unsatisfactory performance in delicate operations and complex geological environments. In addition, the lack of stability of excavators in soft or unstable strata can easily lead to safety accidents and increase construction risks.

[0003] Therefore, the existing technology urgently needs a new deep foundation pit excavation technology or method that can overcome the defects of low excavation accuracy, low efficiency, poor stability and safety hazards, so as to better adapt to the needs and challenges of modern construction. Summary of the invention

[0004] In order to improve the excavation accuracy and excavation efficiency of workers when using an excavator to excavate a foundation pit, the present application provides a construction device and a construction method for excavating a deep foundation pit of a building.

[0005] In the first aspect, the present application provides a construction device for deep foundation pit excavation using the following technical solution: A construction device for excavating a deep foundation pit of a building, comprising an excavator body, a positioning assembly and a stabilizing assembly, wherein the excavator body is used to excavate earth in the foundation pit, the positioning assembly comprises a sensor and a receiver, the sensor is mounted on the excavator body, the sensor is used to sense the depth of the excavator body in the foundation pit; the receiver is used to receive data transmitted by the sensor; the stabilizing assembly comprises a plurality of supporting legs and feet mounted on each of the supporting legs, each of the supporting legs is mounted on the excavator body, each of the feet is telescopically mounted on the corresponding supporting leg, and one end of the foot away from the supporting leg abuts against the earth at the bottom of the foundation pit.

[0006] By adopting the above technical solution, firstly, the positioning components, especially the cooperation of the sensor and the receiver, can sense the excavation depth of the excavator body in the foundation pit in real time and accurately, and transmit the data to the receiver for processing; the accuracy of deep foundation pit excavation is significantly improved, and the errors caused by manual judgment or improper operation are reduced, thereby reducing the workload of subsequent manual corrections and improving construction efficiency and quality; Second, the use of a combination of support legs and anchors effectively enhances the operating stability of the excavator under complex geological conditions. When the anchors are in contact with the earth at the bottom of the foundation pit, they can provide additional support for the excavator to prevent safety issues such as tilting, slipping or collapse of the excavator due to unstable geological conditions. This design not only improves safety during the construction process, but also protects the lives of construction workers and reduces potential accident risks.

[0007] Preferably, the positioning assembly also includes a laser rangefinder, and the laser rangefinder is installed on the bucket of the excavator body.

[0008] By adopting the above technical solution, the laser rangefinder can measure the distance between the bucket and the side wall of the foundation pit in real time and accurately, thereby helping the operator to better grasp the spatial relationship during the excavation process, effectively reducing the occurrence of over-excavation or under-excavation, and thus improving the overall excavation accuracy and construction quality; at the same time, the data of the laser rangefinder will be fed back to the excavator operating room, and the operator can adjust the excavation angle, depth and speed in time according to these data to ensure the efficient progress of the excavation operation.

[0009] Preferably, the stabilization component also includes a geological detection sensor and a controller, the geological detection sensor is used to detect changes in geological conditions in which the excavator body is located, and the controller is used to control each of the ground feet to extend and retract on each of the supporting legs until each of the supporting legs is at the same height when the geological detection sensor detects changes in geological conditions.

[0010] By adopting the above technical solution, the construction device can sense and respond to changes in the geological conditions in real time. This adaptive ability ensures that the excavator can maintain a stable operating state under different geological conditions such as soil type, humidity, hardness, etc., reducing the risk of equipment tilting and shaking due to uneven geology or sudden changes; at the same time, it reduces the need for manual intervention and saves manpower and time costs. At the same time, the stable working environment enables the excavator to carry out excavation operations continuously and efficiently without being disturbed by changes in geological conditions, thereby improving overall construction efficiency.

[0011] Preferably, a mounting frame is provided on the excavator body, a feeding frame with an upper opening is installed on the mounting frame, a plurality of first discharge holes are opened at the bottom of the feeding frame, a screening plate is installed at the bottom of the feeding frame, a plurality of second discharge holes are opened on the screening plate; a vibrating member for driving the screening plate to vibrate on the feeding frame is installed on the feeding frame.

[0012] During the earth excavation process, large stones, bricks, concrete blocks and other debris are often mixed in. These debris need to be screened during the backfilling process, which increases the workload of workers. By adopting the above technical solution, these large stones and debris are screened out from the earth, and only the screened and relatively uniform earth will continue to be used for subsequent construction or transportation, thereby improving the utilization rate of the earth. At the same time, through the pre-screening step, the risk of large stones and debris causing equipment damage, pipe blockage or increased processing costs during subsequent construction or transportation is reduced.

[0013] Preferably, the mounting frame is provided with a receiving box with an upper opening below the feeding frame, the receiving box is used to receive earth dropped from the feeding frame, and the receiving box is equipped with a transport component for transporting the earth in the receiving box to the ground.

[0014] By adopting the above technical solution, the automatic collection of the earth after screening is realized. The screened earth falls directly into the receiving box, and there is no need for workers to manually collect or carry it. The workers are only responsible for recycling and transporting the earth in the receiving box, which greatly reduces the labor intensity of the workers; simplifies the collection process and improves work efficiency.

[0015] Preferably, the transport component includes a vacuum tube and a vacuum pump, one end of the vacuum tube is connected to the material receiving box, and the other end is used to connect to a circulation box for storing earth for recycling, and the vacuum pump is connected to the vacuum tube and is used to create negative pressure in the vacuum tube.

[0016] By adopting the above technical solution, firstly, the vacuum pump creates negative pressure in the vacuum tube, so that the earth in the receiving box can be directly extracted and transported to the predetermined circulation box without manual handling or traditional mechanical transportation, which greatly reduces the workload of transportation; and the vacuum extraction method is more efficient than the traditional transportation method; it only needs to maintain the negative pressure in the vacuum tube, and the earth can be quickly and continuously extracted and transported, which improves the transportation efficiency and is conducive to the rapid construction of deep foundation pits; secondly, by adjusting the length and layout of the vacuum tube, it is possible to flexibly respond to the earth transportation needs of different positions in the foundation pit and on the moving excavator body, so that no matter where the excavator is working in the foundation pit, it is possible to ensure that the earth can be smoothly extracted and transported to the designated position by adjusting the length of the pipeline; thirdly, the degree of automation of construction is improved by vacuum extraction, which reduces the noise, dust and other pollution problems caused by manual handling and mechanical transportation, and improves the workers' work comfort and satisfaction.

[0017] Preferably, the feeding frame is detachably mounted on the mounting frame, and the feeding frame is used in conjunction with a crane, on which a hanger is provided; the feeding frame is provided with a plurality of pairs of connecting frames arranged along its own length direction; each pair of connecting frames, on one side close to each other, is provided with a connecting groove for the hanger to be inserted into the connecting frame after sliding in a horizontal direction, and each connecting frame is provided with a fixing component for fixing the hanger on the connecting frame.

[0018] By adopting the above technical solution, first, the feeding frame is used in conjunction with the crane and the hanger to realize the rapid lifting of the screened stones or debris to the ground; the traditional manual or vehicle transportation method is changed, and the waiting time and transfer links in the transportation process are reduced, thereby significantly improving the construction efficiency; second, compared with the traditional method, workers may need to manually or use small tools to move the screened stones or debris to the transport vehicle. The design of this application enables workers to complete the lifting work only by operating the crane, which greatly reduces the labor intensity; third, the feeding frame is designed to be detachable and can be replaced, so that the two links of screening and transportation can be more closely connected; once the screening operation is completed, the lifting operation can be carried out immediately without waiting for the arrival of other transportation tools, thereby optimizing the construction process and further improving the overall construction efficiency.

[0019] Preferably, the connecting frame includes a pair of side frames located at the ends of the feeding frame along the sliding direction of the hanger, and each of the side frames is provided with a stopper at the end along the sliding connection direction of the hanger; the fixing assembly includes a fixing rod, and each of the connecting frames is provided with a locking groove at the bottom of the connecting groove, and the fixing rod is slidably installed on the connecting frame through the locking groove; a plurality of locking holes are provided on the hanger, and one of the fixing rods passes through the connecting frame until one end at the connecting groove is inserted into the hanger through the locking hole, and a guide surface is provided at one end of each fixing rod close to the hanger; an elastic member is sleeved on each of the fixing rods, and one end of each of the elastic members is connected to the fixing rod and the other end is fixed to the bottom of the locking groove of the connecting frame, and a reset member for driving the fixing rod to reset to the locking groove is also installed on the connecting frame.

[0020] By adopting the above technical solution, workers only need to slide the hanger in the horizontal direction and insert it into the connecting groove, and then the hanger can be firmly fixed on the connecting frame through the locking effect of the fixing rod, without the need for complicated bolt tightening or other tedious operations, thus realizing a quick and convenient connection between the hanger and the feeding frame; secondly, during the deep foundation pit excavation construction process, workers need to work at a certain height, which increases the safety risk of the operation. The design of this application makes the connection process between the hanger and the feeding frame simpler and faster, reducing the need for workers to stay in the air for a long time and perform complex operations, thereby reducing safety risks.

[0021] Preferably, the reset member includes a pair of reset rods, one of the reset rods is slidably installed in the vertical direction on each of the connecting frames located on the same side of the feeding frame along the sliding direction of the hanger; the fixed rod on each of the connecting frames on the same side passes through one end of the connecting frame and is connected to the reset rod on that side.

[0022] By adopting the above technical solution, after the feeding frame is hoisted to the ground, the worker pulls the reset rod, thereby driving all the fixing rods on that side to slide in the locking groove, thereby withdrawing from the hanger and completing the separation from the hanger. The worker then pushes the hanger from the side to complete the unlocking of the hanger and the feeding frame; in this process, it is only necessary to lift the reset rod to drive the locking rods at various locations to release the fixation of the hanger, thereby maintaining the synchronization of unlocking.

[0023] In the second aspect, the present application provides a construction method for deep foundation pit excavation, based on a construction device for deep foundation pit excavation, and adopts the following technical solution: A construction method for excavating a deep foundation pit of a building, the construction method comprising: S1: Surveying and setting out: Conduct surveying and construction at the predetermined location of the foundation pit; S2: earth excavation: using the excavator body to excavate at a predetermined position of the foundation pit, and simultaneously performing support construction on the inner wall of the foundation pit; S3: Transport the excavated earth to the ground.

[0024] By adopting the above technical solution, an excavator body is used to carry out deep foundation pit excavation construction. The positioning component on the excavator body can accurately display the depth of the foundation pit excavated by the excavator body, thereby improving the accuracy of the excavator body when excavating the foundation pit; at the same time, the feet of the stabilizing component are adjusted so that the feet are always in contact with the earth in the foundation pit, thereby improving the stability of the excavator body in the foundation pit.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The use of positioning components significantly improves the accuracy of deep foundation pit excavation, reduces errors caused by manual judgment or improper operation, thereby reducing the workload of subsequent manual corrections and improving construction efficiency and quality; 2. The combination of support legs and feet effectively enhances the operating stability of the excavator under complex geological conditions; when the feet are in contact with the earth at the bottom of the foundation pit, they can provide additional support for the excavator to prevent safety problems such as tilting, slipping or collapse of the excavator due to unstable geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view of the construction device of the embodiment of the present application.

[0027] Figure 2 It is the first cross-sectional view of the partial structure of the construction device of the present application.

[0028] Figure 3 It is the second cross-sectional view of the partial structure of the construction device of the present application.

[0029] Figure 4 yes Figure 3 A is an enlarged view of the middle image.

[0030] Description of reference numerals: 1. Excavator body; 2. Stabilizing assembly; 21. Support legs; 22. Anchors; 3. Mounting frame; 31. Rollers; 32. Feeding frame; 33. Screen plate; 34. Receiving box; 35. Vacuum tube; 4. Hanger; 41. Locking hole; 5. Connecting frame; 51. Connecting slot; 6. Fixing assembly; 61. Fixing rod; 62. Elastic member; 7. Reset rod. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] In the first aspect, the present application discloses a construction device for deep foundation pit excavation. Figure 1 The deep foundation pit excavation construction device includes an excavator body 1, a positioning component and a stabilizing component 2. The excavator body 1 is used to excavate earth in the foundation pit. The positioning component includes a sensor and a receiver. The sensor is installed on the excavator body 1. The sensor is used to sense the depth of the excavator body 1 in the foundation pit; the receiver is used to receive data transmitted by the sensor; the sensor and the receiver work together to sense the excavation depth of the excavator body 1 in the foundation pit in real time and accurately, and transmit the data to the receiver for processing; workers can perform construction according to the excavation depth data at this time, thereby improving the accuracy of deep foundation pit excavation; the positioning component also includes a laser rangefinder, which is installed on the bucket of the excavator body 1, so as to detect the distance between the bucket and the inner wall of the foundation pit in real time, and further improve the excavation accuracy.

[0033] Reference Figure 1 The stabilizing assembly 2 includes a plurality of supporting legs 21 and anchors 22 installed on each supporting leg 21. Each supporting leg 21 is installed on the excavator body 1. Each anchor 22 is telescopically installed on the corresponding supporting leg 21. One end of the anchor 22 away from the supporting leg 21 abuts against the earth at the bottom of the foundation pit. Workers adjust the length and position of the supporting leg 21 according to the geological conditions to ensure the stability of the excavator.

[0034] The stabilization component 2 also includes a geological detection sensor and a controller. The geological detection sensor is used to detect changes in the geological conditions in which the excavator body 1 is located. The controller is used to control the extension and retraction of each footing 22 on each support leg 21 until each support leg 21 is at the same height when the geological detection sensor detects changes in the geological conditions. By integrating intelligent equipment such as geological detection sensors and controllers, the construction device can autonomously perceive the environment, analyze data and make corresponding adjustments, reducing the impact of human factors on the construction process and improving the accuracy and reliability of the construction.

[0035] Reference Figure 1 A mounting frame 3 is provided on the excavator body 1, and the stabilizing component 2 is installed on the mounting frame 3 to reduce the influence of the stabilizing component 2 on the excavator body 1 and the bucket during operation; a roller 31 is also installed on the mounting frame, and when the excavator body 1 moves, the mounting frame 3 moves synchronously with the excavator body 1.

[0036] Reference Figure 1 and Figure 2A feeding frame 32 with an upper opening is installed on the mounting frame 3, a plurality of first discharge holes are opened at the bottom of the feeding frame 32, a screening plate 33 is installed at the bottom of the feeding frame 32, a plurality of second discharge holes are opened on the screening plate 33; a vibrating member for driving the screening plate 33 to vibrate on the feeding frame 32 is installed on the feeding frame 32; in the present embodiment, the vibrating member is a vibration motor, which is installed on the feeding frame 32 and the output end of the vibrating member is connected to the screening plate 33.

[0037] The mounting frame 3 is provided with a receiving box 34 with an upper opening below the feeding frame 32. The receiving box 34 is used to receive the earth falling from the feeding frame 32. The receiving box 34 is equipped with a transport component for transporting the earth in the receiving box 34 to the ground; the transport component includes a vacuum tube 35 and a vacuum pump. One end of the vacuum tube 35 is connected to the receiving box 34, and the other end is used to connect to a circulation box for storing and reusing the earth. The vacuum pump is connected to the vacuum tube 35 and is used to create negative pressure in the vacuum tube 35. Workers throw the excavated earth into the feeding frame 32. After the earth is in the feeding frame 32, the vibration part is started to drive the screen plate 33 to vibrate on the feeding frame 32, and the earth falls into the receiving box 34 through the first discharge port and the second discharge hole. The transportation component is started, and the vacuum tube 35 begins to absorb the earth in the receiving box 34 and transports it to a predetermined position, waiting for the earth to be backfilled. The use of the receiving box 34 and the transportation component reduces the workload of workers entering the excavation site to collect earth during the process, effectively reduces the labor intensity of the workers, realizes the automated collection and transportation of the screened earth, and improves the construction efficiency.

[0038] Reference Figure 2 and Figure 3 The feeding frame 32 is detachably mounted on the mounting frame 3, and the feeding frame 32 is used in conjunction with a crane, on which a hanger 4 is provided; a plurality of pairs of connecting frames 5 are arranged along the length direction of the feeding frame 32; a connecting groove 51 is provided on each side of each pair of connecting frames 5 close to each other for the hanger 4 to slide in the horizontal direction and then be plugged into the connecting frame 5, and each connecting frame 5 is provided with a fixing component 6 for fixing the hanger 4 on the connecting frame 5.

[0039] Reference Figure 3 and Figure 4The connecting frame 5 includes a pair of side frames located at the end of the feeding frame 32 along the sliding direction of the hanger 4, and a stopper is provided at the end of each side frame along the sliding connection direction of the hanger 4; the fixing assembly 6 includes a fixing rod 61, and each connecting frame 5 is provided with a locking groove at the bottom of the connecting groove 51, and the fixing rod 61 is slidably installed on the connecting frame 5 through the locking groove; a plurality of locking holes 41 are provided on the hanger 4, and a fixing rod 61 passes through the connecting frame 5 until one end at the connecting groove 51 is inserted into the hanger 4 through a locking hole 41, and a guide surface is provided at one end of each fixing rod 61 close to the hanger 4; each fixing rod 61 is sleeved with an elastic member 62, and one end of each elastic member 62 is connected to the fixing rod 61, and the other end is fixed to the bottom of the connecting frame 5 at the locking groove. The connecting frame 5 is also equipped with a reset member for driving the fixing rod 61 to reset to the locking groove.

[0040] The reset member includes a pair of reset rods 7, one reset rod 7 is slidably installed in the vertical direction on each connecting frame 5 located on the same side of the feeding frame 32 along the sliding direction of the hanger 4; the fixed rod 61 on each connecting frame 5 on the same side passes through one end of the connecting frame 5 and is connected to the reset rod 7 on that side.

[0041] After screening out the stones and debris in the earthwork, the worker starts the crane to move the hanger 4 to the top of the feeding frame 32, and then embeds the hanger 4 into the connecting frame 5 from the side through the various connecting grooves 51. At this time, the fixing component 6 is started to fix the hanger 4 in the connecting frame 5, so that the hanger 4 and the feeding frame 32 are stably connected. The feeding frame 32 can be lifted as a whole by starting the crane again and transported to the predetermined position for placing the debris and stones; when it is transported to the desired position, the reset component is started to drive the fixing component 6 to reset, release the fixation of the hanger 4, and the worker takes the stones and debris out of the feeding frame 32.

[0042] In a second aspect, the present application also discloses a construction method for deep foundation pit excavation, the construction method comprising: S1: Surveying and staking out: Carry out surveying and construction at the predetermined location of the foundation pit to determine the excavation boundary and excavation depth of the foundation pit.

[0043] S2: Earth excavation: using the excavator body 1 to excavate at a predetermined position of the foundation pit, and at the same time performing support construction on the inner wall of the foundation pit.

[0044] S2.1: First, start the stabilizing component 2 to adjust the position of the foot 22, so that when the foot 22 abuts against the earth in the foundation pit, the excavator body 1 remains stable; S2.2: Start the excavator body 1 to start excavation, and put the excavated earth into the feeding frame 32; S2.3: Start the vibration element to screen the earth in the feeding frame 32 to separate the stones from the earth; the earth falls into the receiving box 34; S2.4: When the stones and debris are accumulated in the feeding frame 32, the worker starts the crane to lift the hanger 4 to the feeding frame 32, and simultaneously lifts the hanger 4 and the feeding frame 32 to the ground to remove the stones and debris, and then lifts another reserved feeding frame 32 again and installs it on the mounting frame 3 to continue excavation.

[0045] S3: Transport the excavated earth to the ground.

[0046] S3.1: Start the transport component to extract the earth that falls into the receiving box 34 to the ground.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction device for excavating a deep foundation pit, comprising an excavator body (1), a positioning assembly and a stabilizing assembly (2), characterized in that: The excavator body (1) is used for excavating earth in a foundation pit. The positioning component comprises a sensor and a receiver. The sensor is mounted on the excavator body (1) and is used to sense the depth of the excavator body (1) in the foundation pit. The receiver is used to receive data transmitted by the sensor. The stabilizing component (2) comprises a plurality of supporting legs (21) and a foot (22) mounted on each supporting leg (21). Each supporting leg (21) is mounted on the excavator body (1). Each foot (22) is telescopically mounted on the corresponding supporting leg (21). One end of the foot (22) away from the supporting leg (21) abuts against the earth at the bottom of the foundation pit.

2. A construction device for deep foundation pit excavation according to claim 1, characterized in that: The positioning assembly also includes a laser rangefinder, which is mounted on the bucket of the excavator body (1).

3. A construction device for deep foundation pit excavation according to claim 1, characterized in that: The stabilizing assembly (2) further comprises a geological detection sensor and a controller, wherein the geological detection sensor is used to detect changes in geological conditions in which the excavator body (1) is located, and the controller is used to control each of the footings (22) to extend and retract on each of the support legs (21) until each of the support legs (21) is located at the same height when the geological detection sensor detects changes in geological conditions.

4. A construction device for deep foundation pit excavation according to claim 1, characterized in that: The excavator body (1) is provided with a mounting frame (3), a feeding frame (32) with an upper opening is mounted on the mounting frame (3), a plurality of first discharge holes are opened at the bottom of the feeding frame (32), a screening plate (33) is mounted at the bottom of the feeding frame (32), a plurality of second discharge holes are opened on the screening plate (33); and a vibration member for driving the screening plate (33) to vibrate on the feeding frame (32) is mounted on the feeding frame (32).

5. A construction device for deep foundation pit excavation according to claim 4, characterized in that: The mounting frame (3) is provided with a receiving box (34) with an upper opening below the feeding frame (32); the receiving box (34) is used to receive earth falling from the feeding frame (32); and the receiving box (34) is provided with a transport component for transporting the earth in the receiving box (34) to the ground.

6. A construction device for deep foundation pit excavation according to claim 5, characterized in that: The transport component comprises a vacuum tube (35) and a vacuum pump. One end of the vacuum tube (35) is connected to the material receiving box (34), and the other end is used to connect to a circulation box for storing earth and recycling it. The vacuum pump is connected to the vacuum tube (35) and is used to create negative pressure in the vacuum tube (35).

7. A construction device for deep foundation pit excavation according to claim 5, characterized in that: The feeding frame (32) is detachably mounted on the mounting frame (3), and the feeding frame (32) is used in conjunction with a crane, on which a hanger (4) is provided; the feeding frame (32) is provided with a plurality of pairs of connecting frames (5) arranged along its length direction; each pair of the connecting frames (5) is provided with a connecting groove (51) on one side close to each other for the hanger (4) to slide in a horizontal direction and then be plugged into the connecting frame (5); each connecting frame (5) is provided with a fixing component (6) for fixing the hanger (4) on the connecting frame (5).

8. A construction device for deep foundation pit excavation according to claim 7, characterized in that: The connecting frame (5) comprises a pair of side frames located at the end of the feeding frame (32) along the sliding direction of the hanger (4), and each of the side frames is provided with a stopper at the end of the sliding connection direction of the hanger (4); the fixing assembly (6) comprises a fixing rod (61), and each of the connecting frames (5) is provided with a locking groove at the bottom of the connecting groove (51), and the fixing rod (61) is slidably mounted on the connecting frame (5) through the locking groove; a plurality of locking holes (41) are provided on the hanger (4), and a fixing rod (61) passes through the connecting frame (51) to be fixed to the connecting frame (5). One end of the connecting frame (5) is inserted into the hanging frame (4) through the locking hole (41) until it reaches the connecting groove (51); one end of each fixing rod (61) close to the hanging frame (4) is provided with a guide surface; each fixing rod (61) is sleeved with an elastic member (62); one end of each elastic member (62) is connected to the fixing rod (61) and the other end is fixed to the bottom of the locking groove of the connecting frame (5); and a reset member for driving the fixing rod (61) to reset to the locking groove is also installed on the connecting frame (5).

9. A construction device for deep foundation pit excavation according to claim 8, characterized in that: The reset member comprises a pair of reset rods (7), one of the reset rods (7) being slidably mounted in a vertical direction on each of the connecting frames (5) located on the same side of the feeding frame (32) along the sliding direction of the hanger (4); the fixed rod (61) on each of the connecting frames (5) on the same side passes through one end of the connecting frame (5) and is connected to the reset rod (7) on that side.

10. A construction method for deep foundation pit excavation, based on a construction device for deep foundation pit excavation according to any one of claims 1 to 9, characterized in that: The construction method comprises: S1: Surveying and setting out: Conduct surveying and construction at the predetermined location of the foundation pit; S2: earth excavation: using the excavator body (1) to excavate at a predetermined position of the foundation pit, and simultaneously performing support construction on the inner wall of the foundation pit; S3: Transport the excavated earth to the ground.

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