Integrated construction method suitable for outburst prevention of ultra-deep foundation pit

Abstract

The invention relates to an integrated construction method suitable for outburst prevention of an ultra-deep foundation pit. The integrated construction method comprises the steps that the foundation pit is excavated to the outburst-resistant critical elevation through a dry excavation method; a liftable supporting carrying platform is provided, and an underwater excavation assembly and an underwater bottom sealing assembly are preassembled; the supporting carrying platform is lowered to the pit bottom of the foundation pit; the foundation pit returns water to the specified elevation; an underwater excavation assembly is used for carrying out underwater excavation, and the supporting carrying platforms are lowered layer by layer along with the excavation depth till the appointed elevation of the bottom sealing is reached through excavation; the underwater bottom sealing assembly is used for conducting bottom sealing operation on the foundation pit, and a bottom sealing layer is formed; after the bottom sealing layer reaches the design strength, backwater of the foundation pit is pumped away, and then the bottom plate and the lower side walls are poured through the underwater bottom sealing assembly; and the other side walls and the internal structure of the foundation pit are constructed based on the supporting carrying platform. According to the method, through the combination of dry excavation and wet excavation and the measures of foundation pit backwater and the like, the risk of foundation pit gushing is effectively eliminated, a pressure reduction well does not need to be arranged, and interference to the surrounding environment is small.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit construction, and in particular to an integrated construction method suitable for preventing sudden surge in ultra-deep foundation pits. Background Art

[0002] Currently, ultra-deep foundation pits are usually constructed using the open-cut method. Open-cut construction usually faces the risk of sudden surges at the bottom of the pit during excavation. Currently, two methods are usually used to prevent sudden surges at the bottom of the pit: setting partitions or setting pressure relief wells. Regarding the method of setting partitions, as shown in the published patent (CN 110387884 A), the sudden surges at the bottom of the pit are prevented by setting water-stop curtains to block the pressure water channel and reinforcing the bottom of the pit to increase the thickness of the overlying soil layer. However, this method of setting partitions has relatively high requirements for construction quality. Once the construction quality is not up to standard, it will directly affect the effect of the partition, and thus fail to achieve the purpose of preventing sudden surges at the bottom of the pit. For situations where the pressure-bearing layer is too thick to set partitions, the method of setting pressure relief wells is usually adopted. However, pressure relief wells have too great an impact on the surrounding environment and are not applicable in areas with strict environmental protection requirements. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides an integrated construction method suitable for preventing sudden surges in ultra-deep foundation pits. By combining dry excavation and wet excavation and actively returning water to the foundation pit, the risk of sudden surges in the foundation pit is effectively eliminated. There is no need to set up a pressure reduction well, and the interference to the surrounding environment is small.

[0004] The present invention is implemented through the following scheme: an integrated construction method suitable for preventing sudden surge in ultra-deep foundation pits, comprising the following steps:

[0005] Use dry excavation method to excavate the foundation pit to the critical elevation for anti-surge;

[0006] The installation and commissioning of the integrated construction equipment includes the following steps: providing a supporting and carrying platform and a vertical lifting device, wherein the supporting and carrying platform is detachably equipped with an underwater excavation assembly and an underwater bottom sealing assembly; installing the vertical lifting device outside the foundation pit and connecting the supporting and carrying platform to the lifting end of the vertical lifting device; and lowering the supporting and carrying platform to the bottom of the foundation pit using the vertical lifting device;

[0007] The foundation pit is backfilled to the specified elevation;

[0008] The underwater excavation assembly is used to perform underwater excavation of the foundation pit, and as the excavation depth increases, the supporting and carrying platform is lowered layer by layer using the vertical lifting device until the foundation pit is excavated to the specified elevation of the bottom cover;

[0009] The underwater bottom sealing assembly is used to perform bottom sealing operations on the foundation pit and form a bottom sealing layer;

[0010] After the sealing bottom layer reaches the designed strength, the backwater in the foundation pit is pumped out, and then the underwater bottom sealing assembly is used to pour the bottom slab and the side walls located below the support and carrying platform.

[0011] Based on the support and carrying platform, the construction of the remaining side walls and the internal structure of the foundation pit is carried out, and as the construction height changes, the support and carrying platform is lifted layer by layer by the vertical lifting device.

[0012] A further improvement of the present invention lies in:

[0013] Before the foundation pit excavation, a ring of retaining piles is constructed on the outer periphery of the foundation pit.

[0014] During the foundation pit excavation and the underwater excavation of the foundation pit, as the excavation depth of the foundation pit deepens, the waling is constructed one by one, and the waling is fixedly connected to the inside of the ring of retaining piles.

[0015] A further improvement of the present invention is that active horizontal support assemblies that can move telescopically are connected to the four sides of the support and carrying platform. During the underwater excavation of the foundation pit: when the support and carrying platform needs to be lowered, the active horizontal support assemblies are contracted so that the support and carrying platform can move downward within the ring of retaining piles; when the lowering of the support and carrying platform is stopped, the active horizontal support assemblies are extended so that the support and carrying platform acts as a horizontal support and props against the inside of the ring of retaining piles.

[0016] A further improvement of the present invention lies in: before the construction of the remaining side walls and the internal structure of the foundation pit based on the support and carrying platform and after the already poured side walls reach the designed strength, the support and carrying platform is lowered to the height range of the already poured side walls by the vertical lifting device, and the active horizontal support assemblies are extended so that the support and carrying platform acts as a horizontal replacement support and propping against the already poured side walls.

[0017] A further improvement of the present invention lies in: before the construction of the remaining side walls and the internal structure of the foundation pit based on the support and carrying platform, a construction operation platform for the construction of the remaining side walls and the internal structure of the foundation pit is first installed on the support and carrying platform; after the already poured side walls reach the designed strength, the support and carrying platform together with the construction operation platform is lowered to the height range of the already poured side walls by the vertical lifting device.

[0018] A further improvement of the present invention lies in that during the construction of the internal structure of the foundation pit and the remaining side walls using the construction operation platform: when the support carrying platform needs to be lifted, the active horizontal support assembly is contracted so that the support carrying platform can avoid the collar when being lifted; when the lifting of the support carrying platform stops, the active horizontal support assembly is extended so that the support carrying platform serves as a horizontal replacement support to brace the already poured side wall.

[0019] A further improvement of the present invention lies in that: the underwater excavation assembly includes an underwater excavation member and underwater excavation accessories. When installing and commissioning the integrated construction equipment, the underwater excavation member is installed at the bottom of the support carrying platform; before using the underwater excavation assembly for underwater excavation of the foundation pit, the underwater excavation accessories are connected to the underwater excavation member; during the process of using the underwater excavation assembly for underwater excavation of the foundation pit, the underwater excavation member is used for excavation, and the underwater excavation accessories are used to discharge the excavated muddy water outside the foundation pit.

[0020] A further improvement of the present invention lies in that: the underwater bottom sealing assembly includes an underwater bottom sealing member and underwater bottom sealing accessories. When installing and commissioning the integrated construction equipment, the underwater bottom sealing member is installed at the bottom of the support carrying platform; before using the underwater bottom sealing assembly for bottom sealing operation of the foundation pit, the underwater bottom sealing accessories are connected to the underwater bottom sealing member; during the process of using the underwater bottom sealing assembly for bottom sealing operation of the foundation pit and for pouring the bottom slab and the side wall located below the support carrying platform, the underwater bottom sealing member is used for bottom sealing and pouring, and the underwater bottom sealing accessories are used to convey the bottom sealing material or pouring material outside the foundation pit to the underwater bottom sealing member.

[0021] A further improvement of the present invention lies in that:

[0022] The steps of installing and commissioning the integrated construction equipment further include installing and commissioning a remote monitoring system, and the remote monitoring system includes a monitoring unit, a lifting monitoring unit, an underwater excavation monitoring unit, and an underwater bottom sealing monitoring unit;

[0023] During the whole process of integrated construction, the monitoring unit is used to monitor the internal force and deformation conditions of the support carrying platform, the lifting monitoring unit is used to monitor and control the vertical lifting equipment, the underwater excavation monitoring unit is used to monitor and control the underwater excavation assembly, and the underwater bottom sealing monitoring unit is used to monitor and control the underwater bottom sealing assembly.

[0024] The present invention includes but is not limited to the following beneficial effects:

[0025] By combining dry excavation and wet excavation and actively returning water to the foundation pit, the risk of foundation pit heaving is effectively eliminated. There is no need to set up dewatering wells, and the interference to the surrounding environment is small.

[0026] Through the coordinated setting of the support platform and the vertical lifting equipment, and the integration of the underwater excavation component and the underwater bottom sealing component on the support platform, the support platform can be lifted and lowered along with the underwater excavation process and the internal structure construction process. Based on this support platform, operations such as underwater excavation, underwater bottom sealing, and internal structure construction can be realized simultaneously.

[0027] By setting up the active horizontal support component, the support platform can be used as both a horizontal support and a horizontal strut replacement, enabling support to be carried out simultaneously with excavation, effectively improving the construction speed of the foundation pit and shortening the exposure time of the foundation pit.

[0028] Through the monitoring of various mechanical and structural components by the remote monitoring system, full mechanized operation and precise control of each operation link are achieved, further improving the construction speed of the foundation pit and ensuring the construction quality. Brief Description of the Drawings

[0029] Figure 1 Shows the flow chart of the integrated construction method of the present invention.

[0030] Figure 2 Shows the schematic diagram of the initial installation state of the integrated construction equipment.

[0031] Figure 3 Shows the schematic diagram of the construction state during underwater excavation of the foundation pit Figure 1 。

[0032] Figure 4 Shows the schematic diagram of the construction state during underwater excavation of the foundation pit Figure 2 。

[0033] Figure 5 Shows the schematic diagram of the construction state during underwater bottom sealing.

[0034] Figure 6 Shows the schematic diagram of the construction state during the pouring of the floor slab and the side wall of the floor slab.

[0035] Figure 7 Shows the schematic diagram when the support platform is lowered and used as a horizontal strut replacement to support the poured side wall.

[0036] Figure 8 Shows the schematic diagram when the support platform is lifted to avoid the collar beam.

[0037] In the figure: 1, foundation pit; 11, sealing layer at the bottom; 12, bottom slab; 13, side wall; 2, support platform; 3, vertical lifting equipment; 41, underwater excavation component; 42, underwater excavation accessory; 51, underwater bottom sealing component; 52, underwater bottom sealing accessory; 6, construction operation platform; 71, a ring of retaining piles; 72, purlin; 8, active horizontal support assembly; 9, remote monitoring system. Specific implementation mode

[0038] In order to solve the problems that the existing foundation pit anti-heave methods cannot effectively eliminate the risk of foundation pit heave or cause greater disturbance to the surrounding environment, etc., the present invention provides an integrated construction method applicable to anti-heave of ultra-deep foundation pits. By combining dry excavation and wet excavation and actively returning water to the foundation pit and other measures, the risk of foundation pit heave is effectively eliminated, there is no need to set up a dewatering well, and the interference to the surrounding environment is small. The following further illustrates the integrated construction method applicable to anti-heave of ultra-deep foundation pits with specific embodiments in conjunction with the drawings.

[0039] Refer to Figures 1 to 8 As shown, an integrated construction method applicable to anti-heave of ultra-deep foundation pits includes the steps:

[0040] Step S1, use the dry excavation method to excavate the foundation pit 1 to the anti-heave critical elevation H1. It should be noted that in order to prevent the soil around the foundation pit 1 from tipping inwards during the excavation of the foundation pit 1, usually before the excavation of the foundation pit 1, a ring of retaining piles 71 is constructed on the outer periphery of the foundation pit 1. During the excavation process of the foundation pit, as the excavation depth of the foundation pit deepens, purlins 72 are constructed one by one, and the purlins 72 are fixedly connected inside the ring of retaining piles 71. The purlins 72 and the ring of retaining piles 71 together serve as the retaining structure of the foundation pit 1.

[0041] Step S2, install and debug the integrated construction equipment, including the steps:

[0042] Provide a support platform 2 and a vertical lifting equipment 3. The bottom of the support platform 2 is detachably provided with an underwater excavation assembly and an underwater bottom sealing assembly.

[0043] Install the vertical lifting equipment 2 outside the foundation pit 1 and connect the support platform 2 to the lifting end of the vertical lifting equipment 3.

[0044] Use the vertical lifting equipment 3 to lower the support platform 2 to the bottom of the foundation pit 1, as Figure 2 shown.

[0045] Step S3, return water in the foundation pit to the specified elevation H2, as Figure 3 shown. The specified elevation H2 should be able to meet the requirement that no heave risk will occur during the subsequent wet excavation (i.e., underwater excavation).

[0046] Step S4: Use this underwater excavation assembly to perform underwater excavation of the foundation pit. Specifically, this underwater excavation assembly includes an underwater excavation member 41 and an underwater excavation accessory 42. When performing Step S2, first hoist and install the underwater excavation member 41 at the bottom of the support and carrying platform 2. To facilitate underwater excavation operations, it is preferred to lay a track network at the bottom of the support and carrying platform 2, and the underwater excavation member 41 is slidably arranged in the track network. Further, in order to enable the underwater excavation member 41 to adapt to different-sized spaces below the support and carrying platform 2, the angle and / or length of the underwater excavation member 41 relative to the support and carrying platform 2 are adjustable. Before using this underwater excavation assembly to perform underwater excavation of the foundation pit, connect the underwater excavation accessory 42 to the underwater excavation member 41, and extend the end of the underwater excavation accessory 42 away from the underwater excavation member 41 to the outside of the foundation pit 1. Then, during the process of using this underwater excavation assembly to perform underwater excavation of the foundation pit, use the underwater excavation member 41 for excavation, and use the underwater excavation accessory 42 to discharge the excavated muddy water to the outside of the foundation pit 1. A ground soil collection pit can be set outside the foundation pit to directly discharge the muddy water to the ground sump. As the underwater excavation depth deepens, use the vertical lifting device 3 to lower the support and carrying platform 2 layer by layer, so that the bottom of the foundation pit always remains within the excavation height range of the underwater excavation member 41 until the foundation pit 1 is excavated to the specified bottom-sealing elevation H3, as Figure 4 shown. After the foundation pit is excavated to the specified bottom-sealing elevation H3, remove the underwater excavation accessory 42. It should be noted that during the process of underwater excavation, the construction of the retaining structure should be carried out simultaneously in a crosswise manner, that is, as the excavation depth deepens, continue the construction of each successive purlin 72.

[0047] Step S5: Use this underwater bottom-sealing assembly to perform bottom-sealing operations on the foundation pit 1 and form a bottom-sealing layer 11, as Figure 5 shown. Specifically, this underwater bottom-sealing assembly includes an underwater bottom-sealing member 51 and an underwater bottom-sealing accessory 52. When performing Step S2, first install the underwater bottom-sealing member 51 at the bottom of the support and carrying platform 2. To facilitate underwater bottom-sealing operations, the underwater bottom-sealing member 51 is also slidably arranged in the track network. Further, in order for the underwater bottom-sealing member 51 to adapt to different-sized spaces below the support and carrying platform 2, the angle and / or length of the underwater bottom-sealing member 51 relative to the support and carrying platform 2 are adjustable. Before using this underwater bottom-sealing assembly to perform bottom-sealing operations on the foundation pit 1, connect the underwater bottom-sealing accessory 52 to the underwater bottom-sealing member 51, and extend the end of the underwater bottom-sealing accessory 52 away from the underwater bottom-sealing member 51 to the outside of the foundation pit 1. During the process of using this underwater bottom-sealing assembly to perform bottom-sealing operations on the foundation pit, use the underwater bottom-sealing member 51 for bottom-sealing and pouring, and use the underwater bottom-sealing accessory 52 to convey the bottom-sealing material outside the foundation pit 1 to the underwater bottom-sealing member 51. Correspondingly, a pouring platform can be set outside the foundation pit 1 for providing pouring material to the underwater bottom-sealing accessory 52.

[0048] Step S6: When the bottom seal layer 11 reaches the designed strength, the foundation pit backwater is removed, and then the bottom plate 12 and the side wall 13 located below the supporting platform 2 are cast using the underwater bottom seal member 51. Similarly, during the casting process, the casting material outside the foundation pit 1 is transported to the underwater bottom seal member 51 using the underwater bottom seal member 52. Figure 6 shown.

[0049] Step S7: Based on the supporting platform 2, the remaining side walls and the internal structure of the foundation pit are constructed. As the construction height changes, the supporting platform 2 is lifted layer by layer using the vertical lifting device 3 until the internal structure of the foundation pit is completed. Figure 7 and Figure 8 shown.

[0050] The present invention effectively eliminates the risk of sudden surges in the foundation pit by combining dry and wet excavation and actively backfilling the foundation pit, eliminating the need for a pressure-reducing well and minimizing interference with the surrounding environment. By coordinating the support and carrying platform 2 and the vertical lifting device 3, and integrating the underwater excavation assembly and underwater bottom sealing assembly on the support and carrying platform 2, the support and carrying platform 2 can be raised and lowered in accordance with the progress of underwater excavation and internal structure construction. Based on the support and carrying platform 2, underwater excavation, underwater bottom sealing, and internal structure construction can be carried out simultaneously.

[0051] As a preferred embodiment, the supporting platform 2 is connected to the four sides with active horizontal support components 8 that can be telescopically moved radially outward along the supporting platform 2, including multiple horizontal support members evenly spaced. The horizontal support members can be waterproof jacks or hydraulic cylinders, etc., to adapt to underwater operations. During the underwater excavation of the foundation pit: when the supporting platform 2 needs to be lowered, the active horizontal support component 8 is actively retracted so that the supporting platform 2 can move downward within the circle of retaining piles 71; when the supporting platform 2 stops being lowered, the active horizontal support component 8 is actively extended so that the supporting platform 2 can be used as a horizontal support inside the enclosure to support the enclosure purlin 72, or as a temporary horizontal support for the enclosure to support the enclosure within the circle of retaining piles 71. For example, the step-by-step lowering of the supporting and carrying platform 2 can be coordinated with the layout of the purlin 72. When the latest purlin has not yet been constructed, the supporting and carrying platform 2 can be used as a temporary horizontal support within a circle of retaining piles 71 by adjusting the length of the active horizontal support assembly 8 to ensure the strength of the retaining structure.

[0052] Based on the setting of the active horizontal support assembly 8, the support carrying platform 2 can also be used as a horizontal replacement strut. Specifically: after the already cast side wall (i.e., the side wall 13 constructed together with the bottom plate 12) reaches the design strength, use the vertical lifting device 3 to lower the support carrying platform 2 to the height range of the already cast side wall 13, and extend the active horizontal support assembly 8 so that the support carrying platform 2 acts as a horizontal replacement strut and braces inside the already cast side wall 13. Further, during the construction of the internal structure of the foundation pit and the remaining side walls using the construction operation platform 2: when the support carrying platform 2 needs to be lifted, contract the active horizontal support assembly 8 so that the support carrying platform 2 can avoid the collar beam 72 when being lifted; when the lifting of the support carrying platform 2 is stopped, extend the active horizontal support assembly 8 so that the support carrying platform 2 acts as a horizontal replacement strut and braces inside the already cast side wall (corresponding to a part of the remaining side walls mentioned above).

[0053] Through the setting of the active horizontal support assembly 8, the support carrying platform 2 can be used as both a horizontal support and a horizontal replacement strut at the same time, enabling support to be carried out as excavation progresses, effectively improving the construction speed of the foundation pit and shortening the exposure time of the foundation pit. Moreover, the horizontal support force value of the active horizontal support assembly 8 can be adjusted according to surrounding conditions such as the excavation depth of the foundation pit to reduce the deformation of the retaining structure and the impact of the foundation pit excavation on the surrounding environment.

[0054] As a preferred embodiment: to facilitate the installation of the underwater excavation assembly and the underwater bottom sealing assembly, the support carrying platform 2 is set as a hollow steel structure grid platform. However, when constructing the remaining side walls and the internal structure of the foundation pit, operators need to enter the site. Therefore, in this embodiment, before constructing the remaining side walls and the internal structure of the foundation pit based on the support carrying platform 2, first remove the underwater bottom sealing accessory 52 and install a construction operation platform 6 on the support carrying platform 2. After the already cast side wall reaches the design strength, use the vertical lifting device 3 to lower the support carrying platform 2 together with the construction operation platform 6 to the height range of the already cast side wall. And the construction operation platform 6 is lifted layer by layer as the subsequent support carrying platform 2 is lifted layer by layer to realize the construction of the remaining side walls and the internal structure of the foundation pit based on the construction operation platform 6. Through the setting of the construction operation platform 6, the risk of operators falling during the construction of the internal structure of the foundation pit is prevented, and at the same time, it is also convenient to place construction materials and tools on the construction operation platform 6.

[0055] As a preferred embodiment: The integrated construction equipment further includes a remote monitoring system 9. Therefore, the steps of installing and commissioning the integrated construction equipment further include installing and commissioning the remote monitoring system 9, which includes a monitoring unit, a lifting monitoring unit, an underwater excavation monitoring unit, and an underwater bottom sealing monitoring unit. During the whole process of integrated construction, the internal force and deformation of the support platform 2 are monitored by the monitoring unit. The lifting of the vertical lifting equipment 3 is monitored and controlled by the lifting monitoring unit, specifically including lifting control, speed monitoring, speechless alarm self-locking, attitude monitoring during the lifting process of the support platform 2, and lifting rope axial force monitoring, etc. The underwater excavation component is monitored and controlled by the underwater excavation monitoring unit, specifically including an underwater excavation control platform, excavation trajectory recording and monitoring, power system monitoring, slurry transportation monitoring, over-excavation alarm, etc. The underwater bottom sealing component is monitored and controlled by the underwater bottom sealing monitoring unit, specifically including underwater pouring volume control, length control of the underwater excavation member 41, and over-pouring alarm, etc. Preferably, the remote monitoring system 9 further includes a horizontal support monitoring unit and a retaining structure monitoring unit. During the whole process of integrated construction, the active horizontal support component 8 is monitored and controlled by the horizontal support monitoring unit in cooperation with the vertical lifting equipment 3, and the horizontal deformation of the retaining structure and the water level in the foundation pit 1 are monitored by the retaining structure monitoring unit.

[0056] Through the monitoring of various mechanical and structural components by the remote monitoring system 9, full mechanization of the whole process and precise control of each operation link are realized, further improving the construction speed of the foundation pit and ensuring the construction quality.

[0057] The present invention has been described in detail with reference to the accompanying drawings and embodiments. Those of ordinary skill in the art can make various variations of the present invention according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope of the appended claims.

Claims

1. An integrated construction method applicable to preventing upwelling in ultra-deep foundation pits, characterized in that, Including the steps of: Excavating the foundation pit to the critical anti-heave elevation by dry excavation method; Installing and commissioning the integrated construction equipment, including the steps of: providing a support and mounting platform and a vertical lifting device, wherein the support and mounting platform is detachably provided with an underwater excavation component and an underwater bottom sealing component; installing the vertical lifting device outside the foundation pit and connecting the support and mounting platform to the lifting end of the vertical lifting device; using the vertical lifting device to lower the support and mounting platform to the bottom of the foundation pit; Returning the water in the foundation pit to the specified elevation; Using the underwater excavation component to conduct underwater excavation of the foundation pit, and using the vertical lifting device to gradually lower the support and mounting platform layer by layer as the excavation depth increases until the foundation pit is excavated to the specified bottom sealing elevation; Using the underwater bottom sealing component to conduct bottom sealing operation on the foundation pit and form a bottom sealing layer; After the bottom sealing layer reaches the design strength, pumping out the water returned in the foundation pit, and then using the underwater bottom sealing component to pour the bottom slab and the side wall located below the support and mounting platform; Conducting construction of the remaining side walls and the internal structure of the foundation pit based on the support and mounting platform, and using the vertical lifting device to gradually lift the support and mounting platform layer by layer as the construction height changes.

2. The integrated construction method applicable to anti-heave of ultra-deep foundation pit according to claim 1, characterized in that: Before excavating the foundation pit, constructing a circle of retaining piles around the foundation pit; During the process of excavating the foundation pit and underwater excavating the foundation pit, as the excavation depth of the foundation pit increases, constructing the waling beam one by one, and making the waling beam internally connected and fixed to the circle of retaining piles.

3. The integrated construction method applicable to anti-heave in ultra-deep foundation pits as described in claim 2, wherein, The four sides of the support and mounting platform are connected with a retractable and movable active horizontal support component. During the process of underwater excavating the foundation pit: when the support and mounting platform needs to be lowered, contracting the active horizontal support component to enable the support and mounting platform to move downward within the circle of retaining piles; when the lowering of the support and mounting platform is stopped, extending the active horizontal support component to enable the support and mounting platform to act as a horizontal support and brace within the circle of retaining piles.

4. The integrated construction method applicable to preventing upwelling in ultra-deep foundation pits according to claim 3, characterized in that: Before conducting construction of the remaining side walls and the internal structure of the foundation pit based on the support and mounting platform and after the already poured side wall reaches the design strength, using the vertical lifting device to lower the support and mounting platform to the height range of the already poured side wall and extending the active horizontal support component to enable the support and mounting platform to act as a horizontal replacement support and brace within the already poured side wall.

5. The integrated construction method applicable to anti-heave in ultra-deep foundation pits according to claim 4, characterized in that: Before conducting construction of the remaining side walls and the internal structure of the foundation pit based on the support and mounting platform, first installing an operation platform for conducting construction of the remaining side walls and the internal structure of the foundation pit on the support and mounting platform; after the already poured side wall reaches the design strength, using the vertical lifting device to lower the support and mounting platform together with the operation platform to the height range of the already poured side wall.

6. The integrated construction method applicable to preventing gushing in ultra-deep foundation pits according to claim 4, characterized in that, During the construction of the internal structure of the foundation pit and the remaining side walls using the construction operation platform: when the support loading platform needs to be lifted, contract the active horizontal support assembly so that the support loading platform can avoid the collar when being lifted; when the support loading platform stops being lifted, extend the active horizontal support assembly so that the support loading platform serves as a horizontal replacement support to brace the already poured side walls.

7. The integrated construction method applicable to preventing upwelling in ultra-deep foundation pits as claimed in claim 1, wherein: The underwater excavation assembly includes an underwater excavation member and underwater excavation accessories. When installing and commissioning the integrated construction equipment, install the underwater excavation member at the bottom of the support loading platform; before using the underwater excavation assembly for underwater excavation of the foundation pit, connect the underwater excavation accessories to the underwater excavation member. During the process of using the underwater excavation assembly for underwater excavation of the foundation pit, use the underwater excavation member for excavation and use the underwater excavation accessories to discharge the excavated muddy water outside the foundation pit.

8. The integrated construction method applicable to preventing upwelling in ultra-deep foundation pits as described in claim 1, characterized in that: The underwater bottom sealing assembly includes an underwater bottom sealing member and underwater bottom sealing accessories. When installing and commissioning the integrated construction equipment, install the underwater bottom sealing member at the bottom of the support loading platform; before using the underwater bottom sealing assembly for bottom sealing operation of the foundation pit, connect the underwater bottom sealing accessories to the underwater bottom sealing member. During the process of using the underwater bottom sealing assembly for bottom sealing operation of the foundation pit and for pouring the floor slab and the side walls located below the support loading platform, use the underwater bottom sealing member for bottom sealing and pouring, and use the underwater bottom sealing accessories to convey the bottom sealing material or pouring material outside the foundation pit to the underwater bottom sealing member.

9. The integrated construction method for preventing water inrush in ultra-deep foundation pits according to claim 1, characterized in that: The steps of installing and commissioning the integrated construction equipment further include installing and commissioning a remote monitoring system, and the remote monitoring system includes a monitoring unit, a lifting monitoring unit, an underwater excavation monitoring unit, and an underwater bottom sealing monitoring unit. During the whole process of integrated construction, use the monitoring unit to monitor the internal force and deformation of the support loading platform, use the lifting monitoring unit to monitor and control the vertical lifting equipment, use the underwater excavation monitoring unit to monitor and control the underwater excavation assembly, and use the underwater bottom sealing monitoring unit to monitor and control the underwater bottom sealing assembly.

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