A telescopic assembled underground continuous wall and a construction method thereof

Abstract

The application provides a scalable assembled underground continuous wall, which comprises a recycled part and an embedded part arranged along the depth direction of a trench, the embedded part is below the recycled part and is connected with the recycled part, the recycled part is provided with at least two wall blocks which are detachably connected along the depth direction of the trench, the wall block comprises a block main body, a pressure bearing panel, an expansion shaft and a motor, the pressure bearing panel is arranged on both sides of the block main body close to the soil body, the pressure bearing panel is connected with the motor through the expansion shaft, the motor drives the expansion shaft to expand or contract along the width direction of the trench, and the expansion shaft drives the width position of the pressure bearing panel to change. The application can solve the instability problem of the underground continuous wall during support and can improve the recycling benefit of the wall block. The application further provides a construction method of the scalable assembled underground continuous wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground continuous wall construction, and particularly relates to a telescopic assembled underground continuous wall. BACKGROUND

[0002] The underground continuous wall is widely used in building foundation engineering due to its numerous advantages. Among them, the assembled underground continuous wall capable of recycling and reuse is gradually known by the public. Compared with the traditional underground continuous wall, the recyclable assembled underground continuous wall directly stacks and combines unit modules in the trench by preparing the unit modules in advance during construction, and then recycles the unit modules after the construction is completed for subsequent reuse. When recycling the unit modules, that is, pulling out the unit modules from the trench, the soil of the trench side wall will extrude the underground continuous wall unit modules due to the influence of the ground stress, which greatly increases the difficulty of pulling out the underground continuous wall unit modules. In view of this situation, some recyclable assembled underground continuous walls use the scheme of coating a lubricating coating on the contact surface between the unit module and the trench soil when pulling out, which makes the underground continuous wall prone to instability during foundation pit support, thereby increasing the risk of construction in the foundation pit. SUMMARY

[0003] The main technical problem to be solved by the present application is to provide a telescopic assembled underground continuous wall, which can solve the instability problem of the underground continuous wall during support.

[0004] In order to solve the above technical problems, the present application provides a telescopic assembled underground continuous wall, which comprises a recycling part and an embedded part arranged along the depth direction of the trench, the embedded part is located below the recycling part and is connected with the recycling part, the recycling part is provided with at least two wall blocks which can be detachably connected along the depth direction of the trench, the wall block comprises a block main body, a pressure bearing panel, an expansion shaft and a motor, the pressure bearing panel is arranged on both sides of the block main body close to the soil, the pressure bearing panel is connected with the motor through the expansion shaft, the motor drives the expansion shaft to expand and contract along the width direction of the trench, and the expansion shaft drives the width position of the pressure bearing panel to change.

[0005] In a preferred embodiment, the wall block further comprises a wire conduit, a grouting channel and a lifting part for assembling and disassembling with external instruments, the wire conduit and the grouting channel are arranged along the depth direction of the trench and penetrate through the block main body, the wire conduit is connected with the motor through a wire, and the lifting part is installed on one side of the block main body close to the opening of the trench.

[0006] In a preferred embodiment, the wall segment further comprises a bolt, a socket hole and a mounting hole for mounting a fastener; the bolt is arranged on one side of the segment body close to the trench opening, the socket hole is arranged on the side of the segment body away from the trench opening; two wall segments adjacent along the trench depth direction are connected by the bolt and the socket hole; the mounting hole is arranged on the side of the segment body close to the pressure panel.

[0007] In a preferred embodiment, the segment body comprises a protrusion and a groove for aligning the wall segment along the trench depth direction, and an outer protrusion and an inner recess for splicing the wall segment along the trench length direction; the protrusion is arranged on one side of the segment body close to the trench opening, the groove is arranged on the side of the segment body away from the trench opening, and the protrusion and the groove are matched; the protrusion direction of the outer protrusion and the recess direction of the inner recess are arranged along the trench length direction.

[0008] In a preferred embodiment, the wall segment further comprises a water channel, a water stop ring and a hose; the water channel penetrates through the segment body, the water stop ring is installed at the beginning and end of the water channel, and the water channel is connected to the pressure panel through the hose.

[0009] In a preferred embodiment, one side of the pressure panel abutting the trench soil is provided with a water outlet; the pressure panel has a pressure plate opening corresponding to the position of the mounting hole.

[0010] In a preferred embodiment, it further comprises a distribution box and a water supply device arranged outside the trench for power supply; the distribution box is connected to the wire conduit, and the water supply device supplies water to the water channel through a water pump.

[0011] In a preferred embodiment, the embedded part comprises a first embedded block and a second embedded block arranged along the trench depth direction; one end of the first embedded block close to the wall segment is inserted into the socket hole of the wall segment through a pre-buried bolt, the first embedded block is provided with a socket hole penetrating through the first embedded block, and the socket hole is connected to a pre-buried steel bar of the second embedded block; one end of the second embedded block away from the first embedded block abuts the trench soil.

[0012] In a preferred embodiment, the embedded part further comprises a third embedded block mounted between the first embedded block and the second embedded block; the third embedded block is provided with a through hole penetrating through the third embedded block along the trench depth direction; one side of the first embedded block, the second embedded block and the third embedded block close to the trench opening is provided with a lifting position.

[0013] The main technical problem to be solved by the present application is to provide a scalable assembled underground continuous wall construction method as described above, comprising the following steps:

[0014] Step one, connect the first embedded block and the second embedded block, and then hoist into the trench;

[0015] Step two, hoist the wall block into the trench, and connect the wire duct between the wall blocks;

[0016] Step three, excavate the foundation pit, and connect the steel structure crown beam support of the uppermost wall block;

[0017] Step four, during the excavation of the foundation pit, install the fastener through the installation hole to fix the two adjacent wall blocks;

[0018] Step five, after the internal construction of the foundation pit is completed, remove the fastener and the steel structure crown beam support; the wall blocks are hoisted out of the trench in sections, and at the same time, the concrete is backfilled below the wall blocks through the grouting channel until all the wall blocks are hoisted out of the trench.

[0019] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0020] 1. The present application provides a telescopic assembled underground continuous wall, which comprises a recyclable recovery part at the upper part and an embedded part for permanent support at the lower part. By arranging pressure panels on both sides of the block main body of the recovery part close to the trench soil, the pressure panels are connected to the motor through the telescopic shaft, and the motor drives the telescopic shaft to extend or retract along the width direction of the trench. When the wall block is placed in the trench, according to the width of the trench, the telescopic shaft drives the pressure panel to move horizontally outward or inward to tightly abut against the trench side wall soil. By controlling the position change of the pressure panel, the wall block is stably abutted against the trench soil in the width direction, overcoming the stability problem of the underground continuous wall during support.

[0021] 2. The present application improves a telescopic assembled underground continuous wall. By arranging pressure panels on both sides of the block main body of the recovery part close to the trench soil, the side of the pressure panel abutting against the trench side wall soil is provided with a plurality of water outlets, and the water outlets are communicated with the water channel through the hose. The water channel introduces external water source to the water outlet. When the pressure panel is adhered to the trench side wall soil, the water outlet discharges water to flush away the soil adhered to the surface of the pressure panel, so that the wall block of the recovery part is more smooth when pulled out.

[0022] 3. The present application provides a telescopic assembled underground continuous wall, which comprises a recyclable recovery part at the upper part and an embedded part for permanent support at the lower part. The recovery part is inserted into the embedded part. After the foundation pit construction is completed, the wall blocks of the recovery part are hoisted out in sections, while the embedded part is used as permanent support and is not pulled out in the trench. In this way, the workload of pulling out the underground continuous wall can be reduced, and the recycling benefit of the wall block can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1Figure 1 is a schematic view of the installation position of the recovery portion and the embedding portion of the preferred embodiment 1 of the present application;

[0024] Figure 2 Figure 2 is a schematic view of the structure of the recovery portion of the preferred embodiment 1 of the present application;

[0025] Figure 3 Figure 3 is a schematic view of the side surface of the wall block of the preferred embodiment 1 of the present application;

[0026] Figure 4 Figure 4 is a schematic view of the front surface of the wall block of the preferred embodiment 1 of the present application;

[0027] Figure 5 Figure 5 is a schematic view of the top surface of the wall block of the preferred embodiment 1 of the present application;

[0028] Figure 6 Figure 6 is a schematic view of the bottom surface of the wall block of the preferred embodiment 1 of the present application;

[0029] Figure 7 Figure 7 is a schematic view of the structure of the embedding portion of the preferred embodiment 1 of the present application;

[0030] Figure 8 Figure 8 is a schematic view of the side surface of the first embedding block of the preferred embodiment 1 of the present application;

[0031] Figure 9 Figure 9 is a schematic view of the front surface of the first embedding block of the preferred embodiment 1 of the present application;

[0032] Figure 10 Figure 10 is a schematic view of the top surface of the first embedding block of the preferred embodiment 1 of the present application;

[0033] Figure 11 Figure 11 is a schematic view of the side surface of the second embedding block of the preferred embodiment 1 of the present application;

[0034] Figure 12 Figure 12 is a schematic view of the front surface of the second embedding block of the preferred embodiment 1 of the present application;

[0035] Figure 13 Figure 13 is a schematic view of the top surface of the second embedding block of the preferred embodiment 1 of the present application;

[0036] Figure 14 Figure 14 is a schematic view of the side surface of the third embedding block of the preferred embodiment 1 of the present application;

[0037] Figure 15 Figure 15 is a schematic view of the front surface of the third embedding block of the preferred embodiment 1 of the present application;

[0038] Figure 16 Figure 16 is a schematic view of the top surface of the third embedding block of the preferred embodiment 1 of the present application;

[0039] Figure 17Structure schematic view of steel guide wall in preferred embodiment 1 of the present application;

[0040] Figure 18 Structure schematic view of pit excavation to wall segment in preferred embodiment 1 of the present application;

[0041] Figure 19 Structure schematic view of pit excavation to pit bottom in preferred embodiment 1 of the present application;

[0042] Figure 20 Structure schematic view of basement construction in pit in preferred embodiment 1 of the present application;

[0043] Figure 21 Structure schematic view of backfilling concrete after wall segment recovery in preferred embodiment 1 of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments in the present application are within the protection scope of the present application.

[0045] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be wall-mounted connection, can be detachable connection, or integral connection, can be mechanical connection, can be electrical connection, can be direct connection, can be indirect connection through an intermediate medium, can be internal communication of two elements, and for a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Embodiment 1

[0048] Reference Figures 1-20The embodiment provides a scalable assembled underground continuous wall, which comprises a recycled part 1 and an embedded part 2 arranged along the depth direction of a trench, the embedded part 2 is located below the recycled part 1 and is connected with the recycled part 1. The recycled part 1 is provided with at least two wall blocks 11 which can be detachably connected along the depth direction of the trench; the wall block 11 comprises a block body 11-1, a pressure bearing panel 11-2, an expansion shaft 11-3 and a motor 11-4; the pressure bearing panel 11-2 is arranged on both sides of the block body 11-1 close to the soil body, the pressure bearing panel 11-2 is connected with the motor 11-4 through the expansion shaft 11-3, the motor 11-4 drives the expansion shaft 11-3 to expand or contract along the width direction of the trench, and the expansion shaft 11-3 drives the width position of the pressure bearing panel 11-2 to change.

[0049] In more details, the embodiment provides the scalable assembled underground continuous wall, which comprises the recycled part 1 and the embedded part 2. The recycled part 1 and the embedded part 2 are arranged along the depth direction of the trench, and the recycled part 1 is located above the embedded part 2; the recycled part 1 located at the upper part is connected with the recycled part 1 located at the lower part.

[0050] The recycling part 1 is provided with at least two wall blocks 11 which are detachably connected along the depth direction of the trench. The number of the wall blocks 11 can be determined according to the depth of the trench and the construction requirement of the foundation pit. The wall block 11 comprises a block body 11-1, a pressure bearing panel 11-2, an expansion shaft 11-3 and a motor 11-4. The pressure bearing panel 11-2 is arranged on both sides of the block body 11-1 close to the soil body, in detail, the pressure bearing panel 11-2 is parallel to one side of the block body 11-1 close to the soil body of the side wall of the trench. The pressure bearing panel 11-2 is connected to the motor 11-4 through a plurality of expansion shafts 11-3, the motor 11-4 drives the expansion shaft 11-3 to extend or contract along the width direction of the trench, and the expansion shaft 11-3 drives the width position of the pressure bearing panel 11-2 to change. When the wall block 11 is placed in the trench, according to the width of the trench, the expansion shaft 11-3 drives the pressure bearing panel 11-2 to move horizontally outward or inward to abut against the soil body of the side wall of the trench. In detail, the expansion shaft 11-3 extends outward to drive the pressure bearing panel 11-2 to be close to the soil body of the side wall of the trench, and the expansion shaft 11-3 contracts inward to drive the pressure bearing panel 11-2 to be away from the soil body of the side wall of the trench. The wall block 11 further comprises a wire conduit 11-5, a grouting channel 11-6 and a hoisting part 11-7. The wire conduit 11-5 and the grouting channel 11-6 are arranged along the depth direction of the trench and penetrate through the block body 11-1. The wire conduit 11-5 is connected to the motor 11-4 through a wire, and the grouting channel 11-6 is located at the center position of the block body 11-1. In order to facilitate the cooperation of the external machinery to directly hoist and transfer the wall block 11, the hoisting part 11-7 is arranged on one side of the block body 11-1 close to the opening of the trench, and the hoisting part 11-7 is symmetrically arranged, in detail, the hoisting part 11-7 can be a lifting ring pre-buried on the top of the block body 11-1.

[0051] The wall segment 11 further comprises bolts 11-8, sockets 11-9 and mounting holes 11-10. In order to facilitate the connection between the wall segments 11, the bolts 11-8 are arranged on the side of the segment body 11-1 close to the groove opening, i.e. the bolts 11-8 are arranged on the top of the segment body 11-1, and there are four bolts 11-8 on the top of the wall segment 11. The sockets 11-9 are used to match the bolts 11-8. The sockets 11-9 are arranged on the side of the segment body 11-1 away from the groove opening, i.e. the sockets 11-9 are arranged on the bottom of the segment body 11-1, and there are four sockets 11-9 on the bottom of the wall segment 11. The number of the sockets 11-9 is equal to that of the bolts 11-8, and the sockets 11-9 are matched with the bolts 11-8. In detail, two wall segments 11 adjacent in the direction of the groove depth are connected by the bolts 11-8 and the sockets 11-9. The mounting holes 11-10 are used to mount fasteners. The mounting holes 11-10 are arranged on the side of the segment body 11-1 close to the pressure panel 11-2. During the excavation construction of the foundation pit, when the excavation reaches the position between the wall segments 11 and the wall segments 11 or the position between the wall segments 11 and the embedded part 2, the construction personnel can fix the wall segments 11 at the corresponding positions by mounting fasteners through the mounting holes 11-10.

[0052] In order to facilitate the connection of the wall segment 11 in the direction of the trench depth, and also to match the insertion of the upper and lower bolts 11-8 and the socket holes 11-9, the segment body 11-1 includes protrusions 11-1-1 and recesses 11-1-2 for aligning the wall segment 11 in the direction of the trench depth. Two adjacent wall segments 11 are first aligned by the protrusions 11-1-1 and the recesses 11-1-2, and then connected by the insertion of the bolts 11-8 and the socket holes 11-9. Further, in order to enable the recycling part 1 to have an extended function in the length direction of the trench, the segment body 11-1 also includes an outer protrusion 11-1-3 and an inner recess 11-1-4 for splicing the wall segment 11 in the length direction of the trench. Further, in this embodiment, the protrusions 11-1-1 are arranged on the side of the segment body 11-1 close to the opening of the trench, and the recesses 11-1-2 are arranged on the side of the segment body 11-1 away from the opening of the trench. The protrusions 11-1-1 and the recesses 11-1-2 are adapted to each other. The outer protrusion 11-1-3 is arranged at the right end of the segment body 11-1, and the inner recess 11-1-4 is arranged at the left end of the segment body 11-1. The protruding direction of the outer protrusion 11-1-3 and the recessing direction of the inner recess 11-1-4 are both arranged in the length direction of the trench, and the outer protrusion 11-1-3 and the inner recess 11-1-4 are adapted to each other.

[0053] The wall segment 11 also comprises a water channel 11-11, a water stop ring and a hose 11-12. The water channel 11-11 penetrates through the segment body 11-1, and the water channel 11-11 communicates the lowermost segment body 11-1 to the uppermost segment body 11-1 of the recycling part 1. The water stop ring is installed at the beginning and end of the water channel 11-11 to prevent water leakage in the water channel 11-11. The pressure bearing panel 11-2 is provided with a plurality of water outlets 11-2-1 located on the side of the pressure bearing panel 11-2 abutting the trench soil. The water channel 11-11 communicates the pressure bearing panel 11-2 through the hose 11-12, and in turn communicates the water outlets 11-2-1 of the pressure bearing panel 11-2. The water channel 11-11 introduces external water source to the water outlets 11-2-1, and when the pressure bearing panel 11-2 is adhered to the trench side wall soil, the water outlets 11-2-1 discharge water to flush away the soil adhered to the surface of the pressure bearing panel 11-2, so that the wall segment 11 of the recycling part 1 is more smooth when pulled out. In order to match the installation of fasteners in the installation hole 11-10 of the wall segment 11, the pressure bearing panel 11-2 has a pressure bearing panel opening 11-2-2 corresponding to the position of the installation hole 11-10. When it is necessary to install fasteners in the installation hole 11-10, the fasteners can pass through the pressure bearing panel opening 11-2-2 and then enter the installation hole 11-10 for installation.

[0054] The telescopic assembled underground continuous wall of the embodiment also comprises a distribution box, a water supply device and a steel guide wall 3. The distribution box and the water supply device are both arranged outside the trench. The water supply device is arranged at a safe position about 3 meters away from the trench edge outside the trench. The distribution box is arranged at a safe position about 3 meters away from the trench edge outside the trench and about 5 meters away from the water supply device. The distribution box is connected to the electric wire conduit 11-5, and the water supply device supplies water to the water channel 11-11 through a water pump. The steel guide wall 3 comprises a steel plate 31 and a rotating shaft 32, and the steel plate 31 is connected to the rotating shaft 32 in a bearing and inserting manner. The steel guide wall 3 is laid above the trench to protect the trench opening.

[0055] In the embodiment, the embedded part 2 comprises a first embedded block 21 and a second embedded block 22. The first embedded block 21 and the second embedded block 22 are arranged along the trench depth direction. The first embedded block 21 is inserted into the socket hole 11-9 of the wall segment 11 by the pre-buried bolt 21-1 on the top of the first embedded block 21, so that the first embedded block 21 is inserted into the wall segment 11. The first embedded block 21 further has a hole 21-2 penetrating the first embedded block 21. The second embedded block 22 is provided with a pre-buried steel bar 22-1 on the upper end of the second embedded block 22, which is inserted into the hole 21-2, so that the second embedded block 22 is connected to the first embedded block 21. The second embedded block 22 is provided with a wall shoe 22-2 on the bottom of the second embedded block 22, which is inserted into the soil at the deep part of the trench. It is worth noting that the position of the first embedded block 21 should be arranged at the position where the bending moment of the overall underground continuous wall above the bottom of the foundation pit is the smallest.

[0056] Further, in order to make the embedded part 2 have better supporting effect in the trench, the embedded part 2 further comprises a third embedded block 23, which is arranged between the first embedded block 21 and the second embedded block 22, and a plurality of third embedded blocks 23 are connected between the first embedded block 21 and the second embedded block 22. The third embedded block 23 has a through hole 23-1 penetrating the third embedded block 23, and the through hole 23-1 is arranged to facilitate the insertion of a whole steel bar to connect the first embedded block 21, the third embedded block 23 and the second embedded block 22.

[0057] More specifically, the pre-buried steel bar 22-1 of the second embedded block 22 is inserted into the through hole 23-1 of the third embedded block 23, and the through hole 23-1 into which the pre-buried steel bar 22-1 is inserted is filled with concrete to complete the connection and fixation of the second embedded block 22 and the third embedded block 23; the first embedded block 21 is located above the third embedded block 23, the hole 21-2 is aligned with and communicated with the through hole 23-1, a whole steel bar is inserted into the hole 21-2 and the through hole 23-1 and is poured with concrete to complete the connection of the first embedded block 21 and the third embedded block 23; then the third embedded blocks 23 are connected by the whole steel bar inserted into the through hole 23-1 and poured with concrete. It should be noted that, according to the direction from inside to outside of the trench, in the embodiment, the specific positional relationship between the embedded part 2 and the recycled part 1 is: the second embedded block 22, the third embedded block 23, the first embedded block 21 and the wall segment 11.

[0058] The embedded part 2 also comprises a plurality of semispherical protrusions 24 arranged on the two surfaces of the first embedded block 21, the third embedded block 23 and the second embedded block 22 in contact with the soil of the trench side wall, so as to increase the friction between the soil of the trench side wall and the embedded blocks. In order to facilitate the hoisting of the embedded blocks of the embedded part 2 into the trench, the first embedded block 21, the third embedded block 23 and the second embedded block 22 are each provided with a hoisting position 25 on the top of the embedded block. The embedded part 2 is also provided with a side protrusion and a side recess for splicing and expanding along the length direction of the trench. The side protrusion is arranged at the right end of the embedded block, and the side recess is arranged at the left end of the embedded block.

[0059] In the embodiment, a construction method of the scalable assembled underground continuous wall is also provided, which comprises the following steps:

[0060] Step one, according to the structural drawing, the wall segment 11 of the recycled part 1 and the first embedded block 21, the second embedded block 22 and the third embedded block 23 of the embedded part 2 and related structural accessories are processed and manufactured in the factory, and then the related materials are transported to the construction site;

[0061] Step two, leveling the construction site and reinforcing the soft stratum;

[0062] Step three, measuring and laying out at the construction site, installing the drainage system and determining the position of the foundation pit and the underground continuous wall;

[0063] Step four, excavating the guide wall trench and laying the steel guide wall 3;

[0064] Step five, according to the construction drawing, excavating the trench by using the trenching equipment under the condition of mud protection, and cleaning the bottom;

[0065] Step six, connecting the first embedded block 21, the third embedded block 23 and the second embedded block 22, and then hoisting the first embedded block 21, the third embedded block 23 and the second embedded block 22 into the trench by using the crane; at the same time, the mud in the trench is discharged;

[0066] Step seven, hoisting the wall segment 11 into the trench and connecting the wall segment 11 with the first embedded block 21; at the same time, the electric wire pipe 11-5 between the wall segments 11 is connected; at the same time, the mud in the trench is discharged;

[0067] Step eight, according to the height of the wall segment block 11, the foundation pit is excavated in layers; when the foundation pit is excavated to the first layer, the uppermost wall segment block 11 is connected with the steel structure crown beam support to form a support system; when the excavation is to the position between the upper and lower adjacent two wall segment blocks 11 or the connecting position of the wall segment block 11 above the foundation pit bottom and the first embedded block 21, the wall segment block 11 at the corresponding position is fixed by installing the fastener through the installation hole 11-10;

[0068] Step nine, after the internal construction of the foundation pit is completed, the fastener and the steel structure crown beam support and other support systems are removed; the wall segment block 11 is lifted out of the groove in sections, and at the same time, the concrete is backfilled below the wall segment block 11 through the grouting channel 11-6, until all the wall segment blocks 11 are lifted out of the groove, and finally the ground is backfilled. When the wall segment block 11 is pulled out, if the pressure panel 11-2 is adhered to the soil body in the groove and is difficult to pull out, the external water supply device is opened to introduce water to the water outlet 11-2-1 through the water channel 11-11, so as to flush away the soil body attached to the surface of the pressure panel 11-2, so that the wall segment block 11 is more smooth when pulled out.

[0069] In this embodiment, a specific construction scene of the telescopic assembled underground continuous wall is also introduced. In the construction of the basement, after the internal excavation of the foundation pit is completed, the foundation and the basement are constructed. When the basement bottom plate is constructed, the soil cloth waterproof layer is constructed at the bottom. When the basement side wall is constructed, the construction hole corresponding to the wall segment block 11 installation hole 11-10 is reserved in the basement side wall. After the basement wall reaches the strength requirement, the formwork can be removed. At the same time, the fastener connecting the wall segment blocks 11 is removed through the construction hole reserved in the side wall. When the underground continuous wall block is lifted out, the bottom is backfilled, and the soil cloth waterproof layer is constructed outside the basement side wall. When the backfilled concrete reaches the strength requirement, the construction of the telescopic assembled underground continuous wall is completed.

[0070] The above is only the preferred specific embodiment of the present application, but the design concept of the present application is not limited thereto. Any skilled person in the art can make non-essential modifications to the present application within the technical scope disclosed by the present application, which is an act of infringing the protection scope of the present application.

Claims

1. A scalable, fabricated diaphragm wall, characterized by, The wall segment block comprises a block main body, a pressure bearing panel, an expansion shaft and a motor. The pressure bearing panel is arranged on both sides of the block main body close to the soil body. The pressure bearing panel is connected to the motor through the expansion shaft. The motor drives the expansion shaft to expand or contract along the groove width direction. The expansion shaft drives the width position of the pressure bearing panel to change. The wall segment block further comprises an electric wire pipeline, a grouting channel and a hoisting part for cooperation with external equipment for installation and disassembly. The electric wire pipeline and the grouting channel are arranged along the groove depth direction and penetrate through the block main body. The electric wire pipeline is connected to the motor through a wire. The hoisting part is installed on one side of the block main body close to the groove opening. The wall segment block further comprises a bolt, a socket hole and a mounting hole for mounting a fastener. The bolt is arranged on one side of the block main body close to the groove opening. The socket hole is arranged on one side of the block main body away from the groove opening. Two adjacent wall segment blocks along the groove depth direction are connected through the bolt and the socket hole. The mounting hole is arranged on one side of the block main body close to the pressure bearing panel. The wall segment block further comprises a water channel, a water stop ring and a hose. The water channel penetrates through the block main body. The water stop ring is installed at the beginning and end of the water channel. The water channel is connected to the pressure bearing panel through the hose. One side of the pressure bearing panel abutting the groove soil body is provided with a water outlet. The pressure bearing panel has a pressure bearing plate opening corresponding to the position of the mounting hole. Further comprising a power distribution box and a water supply device arranged outside the groove for power supply. The power distribution box is connected to the electric wire pipeline. The water supply device supplies water to the water channel through a water pump.

2. The scalable assembled diaphragm wall according to claim 1, wherein, The block main body comprises a protrusion and a groove for alignment of the wall segment block along the groove depth direction, and an outer protrusion and an inner recess for splicing of the wall segment block along the groove length direction. The protrusion is arranged on one side of the block main body close to the groove opening. The groove is arranged on one side of the block main body away from the groove opening. The protrusion and the groove are matched. The protruding direction of the outer protrusion and the recess direction of the inner recess are arranged along the groove length direction.

3. The scalable assembled diaphragm wall according to claim 2, wherein, The embedded part comprises a first embedded block and a second embedded block arranged along the groove depth direction. One end of the first embedded block close to the wall segment block is connected to the socket hole of the wall segment block through a pre-buried bolt. The first embedded block is provided with a socket penetrating through the first embedded block. The socket is connected to the pre-buried steel bar of the second embedded block. One end of the second embedded block away from the first embedded block abuts the groove soil body.

4. The scalable assembled diaphragm wall according to claim 3, wherein, The embedded part further comprises a third embedded block installed between the first embedded block and the second embedded block. The third embedded block is provided with a through hole penetrating through the third embedded block along the groove depth direction. One side of the first embedded block, the second embedded block and the third embedded block close to the groove opening is provided with a hoisting position.

5. A method of constructing a scalable assembled diaphragm wall as claimed in claim 4, wherein, The method comprises the following steps: Step one, connect the first and second embedded blocks, and then hoist into the trench; Step two, hoist the wall block into the trench, and connect the electrical conduit between the wall blocks; Step three, excavate the foundation pit, and connect the steel structure crown beam support to the uppermost wall block; Step four, during the excavation of the foundation pit, install the fastener through the installation hole to fix the two adjacent wall blocks; Step five, after the construction inside the foundation pit is completed, remove the fastener and the steel structure crown beam support; segment the wall block and hoist it out of the trench, and simultaneously backfill the concrete under the wall block through the grouting channel until all the wall blocks are hoisted out of the trench.

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