Construction method of ultra-deep underground diaphragm wall close to river-sea water-rich deep soft soil layer

Abstract

The invention relates to the field of continuous wall construction, and particularly discloses a construction method of an ultra-deep underground continuous wall close to a river-sea water-rich deep and thick soft soil layer, which comprises the following steps: S1, excavating a foundation trench, and pouring guide walls of an integral reinforced concrete structure on two sides of a notch of the foundation trench; s2, slurry is injected into the foundation trench; s3, a continuous wall pouring groove is dug in the groove bottom of the foundation groove through a grooving machine between the two guide walls, and a groove wall soil layer of the continuous wall pouring groove is compacted through the grooving machine; s4, a reinforcement cage is manufactured; s5, a reinforcement cage is hung into the continuous wall pouring groove; and S6, concrete is poured into the continuous wall pouring groove and solidified, and the continuous wall is formed. The continuous wall pouring groove has the effect of improving the groove wall stability of the continuous wall pouring groove.

Description

Technical Field

[0001] The present application relates to the field of continuous wall construction, and in particular to a method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer adjacent to a river or sea. Background Art

[0002] At present, the construction area environment of underground continuous wall is quite diverse. When the construction location is near the sea, the terrain is low, the geology and groundwater are relatively rich, and the construction conditions are relatively complex. Due to the influence of factors such as stratum soil pressure, pore water pressure, groundwater level and soil creep, the trench wall is in an unstable state during the trenching process or before the wall is poured, and there is a risk of slippage or collapse at any time.

[0003] In the related technology, a method for constructing ultra-deep underground continuous walls in water-rich soft soil areas is disclosed. During the construction, the safety factor of the stability of the trench wall is calculated in advance based on the physical and mechanical properties of the soil layer in the site, the groundwater level, the mud quality, the length of the unit trench section, and the concept of strength reduction on the basis of the finite difference method. The ultimate stress and large deformation state of the trench wall of the continuous wall casting trench are obtained through parameter reduction cycle calculation, and the stability coefficient of the trench wall of the continuous wall casting trench is obtained. The stability analysis of the trench wall is carried out, the construction is guided, and corresponding wall protection measures are taken to ensure the stability of the trench wall.

[0004] The above-mentioned related technologies have the following defects: the stability analysis of the trough wall of the continuous wall casting trough is used to guide the construction, which is a theoretical guidance. During the actual construction, the actual underground environment has a certain deviation from the theoretical data. During the troughing process of the continuous wall casting trough or before the wall casting, the trough wall of the continuous wall casting trough is in an unstable state and is in danger of slippage or collapse at any time. Summary of the invention

[0005] In order to improve the stability of the trench wall of the continuous wall casting trench, the present application provides an ultra-deep underground continuous wall construction method in a water-rich, thick soft soil layer close to a river or sea.

[0006] The ultra-deep underground continuous wall construction method provided in this application adopts the following technical solutions: The construction method of ultra-deep underground continuous wall in a water-rich, thick and soft soil layer close to a river or sea includes the following steps: S1: excavate the foundation trench and cast the guide wall of the integral reinforced concrete structure on both sides of the trench opening; S2: injecting slurry into the foundation trench; S3: between the two guide walls, using a trenching machine to dig a continuous wall casting trench at the bottom of the foundation trench, and compacting the trench wall soil layer of the continuous wall casting trench by the trenching machine; S4: fabrication of steel cage; S5: placing the steel cage into the continuous wall casting trough; S6: pouring concrete into the continuous wall casting groove and solidifying it to form a continuous wall.

[0007] By adopting the above technical solution, a foundation trench is excavated, and guide walls of an integral reinforced concrete structure are cast on both sides of the trench opening of the foundation trench. After injecting mud into the foundation trench, a continuous wall casting trench is dug out at the bottom of the trench of the foundation trench by a trenching machine, and the soil layer of the trench wall of the continuous wall casting trench is compacted by the trenching machine. A steel cage is hoisted into the continuous wall casting trench, and concrete is poured into the continuous wall casting trench and solidified to form a continuous wall. The present application improves the stability of the trench wall of the continuous wall casting trench by compacting the soil layer of the trench wall of the continuous wall casting trench.

[0008] Optionally, the trenching machine includes a crane, a frame, a trenching mechanism, a first soil pressing mechanism and a second soil pressing mechanism, the top of the frame is connected to the crane, and the crane is used to lift or lower the frame; The groove digging mechanism is mounted on the frame and extends relative to the bottom end of the frame; The first soil compacting mechanism is telescopically mounted on a side wall of the frame; The second soil pressing mechanism is telescopically mounted on a side wall of the frame away from the first soil pressing mechanism.

[0009] By adopting the above technical solution, when excavating the continuous wall casting groove, the frame is driven by a crane to descend into the foundation groove, and the continuous wall casting groove is excavated at the bottom of the foundation groove by the groove digging mechanism. As the groove digging mechanism continues to dig deeper into the soil layer, the depth of the continuous wall casting groove continues to deepen. During the excavation of the continuous wall casting groove, each time the groove digging mechanism contacts the bottom of the continuous wall casting groove, the first soil pressing mechanism and the second soil pressing mechanism are extended away from the frame, the first soil pressing mechanism presses the first side groove wall of the continuous wall casting groove to compact the soil layer of the first side groove wall of the continuous wall casting groove, and the second soil pressing plate presses the second side groove wall of the continuous wall casting groove to compact the soil layer of the second side groove wall of the continuous wall casting groove, thereby improving the groove wall stability of the continuous wall casting groove.

[0010] Optionally, the grooving mechanism includes a main lifting member and a bucket assembly, the bucket assembly includes a first bucket, a first driven rod, a second bucket and a second driven rod, the first bucket and the second bucket are both located at the bottom end of the frame, one side of the bucket mouth of the first bucket and one side of the bucket mouth of the second bucket are both hinged to the frame, the main lifting member is located on the side of the first bucket and the second bucket close to the top of the frame and is connected to the frame, one end of the first driven rod is hinged to the bucket back of the first bucket, and the other end is hinged to the main lifting member, one end of the second driven rod is hinged to the bucket back of the second bucket, and the other end is hinged to the main lifting member, the main lifting member is used to drive the first driven rod and the second driven rod to lift and lower, so that the first bucket and the second bucket are relatively opened and closed.

[0011] By adopting the above technical solution, when excavating the continuous wall casting groove, the main lifting member is first used to drive the first driven rod and the second driven rod to rise by ascending, so that the first bucket and the second bucket rotate upward, and the first bucket and the second bucket are relatively opened. The first bucket and the second bucket are made to contact the soil layer, and then the main lifting member is used to drive the first driven rod and the second driven rod to descend by descending, so that the first bucket and the second bucket rotate downward, so that the first bucket and the second bucket gradually close relative to each other, and then the first bucket and the second bucket can dig downward to the bottom of the foundation groove or the continuous wall casting groove. When the first bucket and the second bucket are closed, the excavated soil will be collected between the first bucket and the second bucket, and then the crane drives the frame to rise and move to the designated position to discard the excavated soil.

[0012] Optionally, the grooving mechanism further includes a main sealing assembly, which includes a stationary sleeve, a movable sleeve, a main sealing ring and a main flexible sealing tube, wherein the stationary sleeve is mounted on the frame, one end of the stationary sleeve is closed and the other end has an opening, one end of the movable sleeve is closed and the other end has an opening, one end of the stationary sleeve opening is movably inserted into the movable sleeve, the main sealing ring is located between the stationary sleeve and the movable sleeve, and the main flexible sealing tube is sleeved outside the stationary sleeve, one end of the stationary sleeve is connected to the stationary sleeve, and the other end is connected to the movable sleeve; The main lifting member is located in the stationary sleeve, and one end is fixedly connected to the stationary sleeve, and the other end is fixedly connected to the movable sleeve, and is used to drive the movable sleeve to move relative to the stationary sleeve; The bucket assembly is connected to the movable sleeve.

[0013] By adopting the above technical solution, the main sealing ring cooperates with the stationary sleeve and the movable sleeve to perform the first sealing on the main lifting part. The main flexible sealing tube cooperates with the stationary sleeve and the movable sleeve to perform the second sealing on the main lifting part. The double sealing makes it difficult for the main lifting part to contact with mud, thereby increasing the service life of the main lifting part.

[0014] Optionally, a sealing cavity is provided on the frame, and a plurality of first through holes are provided on the cavity wall of the sealing cavity. The first soil pressing mechanism includes a first soil pressing plate, a plurality of first telescopic parts and a plurality of first sealing assemblies. The first telescopic parts are arranged in a one-to-one correspondence with the first through holes. The first telescopic parts are installed in the sealing cavity and are partially located in the first through holes. The first soil pressing plate is located on the side of the frame. The first soil pressing plate is connected to the first telescopic part. The first sealing assembly is arranged in a one-to-one correspondence with the first telescopic part. The first sealing assembly is used to seal the gap between the first telescopic part and the hole wall of the first through hole.

[0015] By adopting the above technical solution, the first telescopic member drives the first pressing plate to move closer to or away from the frame by telescoping. The sealing cavity cooperates with the first sealing assembly to seal the first telescopic member, thereby increasing the service life of the first telescopic member.

[0016] Optionally, the first telescopic member includes a first cylinder body and a first telescopic rod, the first cylinder body is installed in the sealed cavity, the first telescopic rod is movably installed in the first through hole, and one end of the first telescopic rod away from the first cylinder body is connected to the first soil pressing plate; The first sealing assembly includes a plurality of first sealing rings and a first flexible sealing tube, wherein the plurality of first sealing rings are installed between the hole wall of the first through hole and the side wall of the first telescopic rod, the first flexible sealing tube is sleeved outside the first telescopic rod, the first end of the first flexible sealing tube is connected to the first soil pressing plate, and the second end of the first flexible sealing tube is connected to the frame.

[0017] By adopting the above technical solution, the first cylinder drives the first telescopic rod to extend and retract, thereby driving the first soil pressing plate to move closer to or farther from the frame. The first sealing ring cooperates with the sealing cavity to perform a first-level sealing on the gap between the first telescopic rod and the first through hole, and the first flexible sealing tube cooperates with the sealing cavity to perform a second-level sealing on the gap between the first telescopic rod and the first through hole. The double sealing makes it difficult for the first telescopic member to contact mud, thereby increasing the service life of the first telescopic member.

[0018] Optionally, the first soil pressing plate includes a first soil pressing part, a first upper guide part and a first lower guide part, the first soil pressing part is connected to the end of the first telescopic rod away from the first cylinder body, the first upper guide part is connected to the top edge of the first soil pressing part, the first lower guide part is connected to the bottom edge of the first soil pressing part, and the first upper guide part and the first lower guide part are both inclined toward the frame.

[0019] By adopting the above technical solution, the first soil pressing part is used to compact the soil layer of the first side wall of the continuous wall casting groove. The first upper guide part and the first lower guide part make it difficult for the first soil pressing part to hang off the soil layer of the first side wall of the continuous wall casting groove during the lifting process.

[0020] Optionally, a plurality of second through holes are provided on the cavity wall of the sealing cavity, the second soil pressing mechanism includes a second soil pressing plate, a plurality of second telescopic parts and a plurality of second sealing assemblies, the second telescopic parts are arranged in a one-to-one correspondence with the second through holes, the second telescopic parts are installed in the sealing cavity, and part of them are located in the second through holes, the second soil pressing plate is located on the side of the frame, the second soil pressing plate is connected to the second telescopic parts, the second sealing assemblies are arranged in a one-to-one correspondence with the second telescopic parts, and the second sealing assemblies are used to seal the gap between the second telescopic parts and the hole wall of the second through hole.

[0021] By adopting the above technical solution, the second telescopic member drives the second pressing plate to move closer to or away from the frame through telescopic movement. The sealing cavity cooperates with the second sealing assembly to seal the second telescopic member, thereby increasing the service life of the second telescopic member.

[0022] Optionally, the second telescopic member includes a second cylinder body and a second telescopic rod, the second cylinder body is installed in the sealed cavity, the second telescopic rod is movably installed in the second through hole, and one end of the second telescopic rod away from the second cylinder body is connected to the second soil pressing plate; The second sealing assembly includes a plurality of second sealing rings and a second flexible sealing tube, wherein the plurality of second sealing rings are installed between the hole wall of the second through hole and the side wall of the second telescopic rod, the second flexible sealing tube is sleeved outside the second telescopic rod, the first end of the second flexible sealing tube is connected to the second soil pressing plate, and the second end of the second flexible sealing tube is connected to the frame.

[0023] By adopting the above technical solution, the second cylinder drives the second telescopic rod to extend and retract, thereby driving the second soil pressing plate to move closer to or farther from the frame. The second sealing ring cooperates with the sealing cavity to perform a first-level sealing on the gap between the second telescopic rod and the second through hole, and the second flexible sealing tube cooperates with the sealing cavity to perform a second-level sealing on the gap between the second telescopic rod and the second through hole. The double sealing makes it difficult for the second telescopic member to contact mud, thereby increasing the service life of the second telescopic rod.

[0024] Optionally, the second soil pressing plate includes a second soil pressing part, a second upper guide part and a second lower guide part, the second soil pressing part is connected to the end of the second telescopic rod away from the second cylinder body, the second upper guide part is connected to the top edge of the second soil pressing part, and the second lower guide part is connected to the bottom edge of the second soil pressing part, and the second upper guide part and the second lower guide part are both inclined toward the frame.

[0025] By adopting the above technical solution, the second soil pressing part is used to compact the soil layer of the second side wall of the continuous wall casting groove. The second upper guide part and the second lower guide part make it difficult for the second soil pressing part to hang off the soil layer of the second side wall of the continuous wall casting groove during the lifting process.

[0026] In summary, the present application includes at least the following beneficial technical effects: 1. In the present application, during the digging process of the continuous wall casting groove, when the digging mechanism contacts the bottom of the continuous wall casting groove each time, the groove wall layers on both sides of the continuous wall casting groove are compacted, thereby improving the groove wall stability of the continuous wall casting groove; 2. In this application, the main lifting part is sealed by the main sealing ring in cooperation with the stationary sleeve and the movable sleeve for the first time, and the main lifting part is sealed by the main flexible sealing tube in cooperation with the stationary sleeve and the movable sleeve for the second time. The double sealing makes it difficult for the main lifting part to contact the mud, thereby increasing the service life of the main lifting part; 3. In the present application, the first sealing ring cooperates with the sealing cavity to perform the first sealing between the first telescopic rod and the first through hole, and the first flexible sealing tube cooperates with the sealing cavity to perform the first sealing between the first telescopic rod and the first through hole. The double sealing makes it difficult for the first telescopic member to contact the mud, thereby increasing the service life of the main lifting member; 4. The first upper guide part and the first lower guide part in the present application make it difficult for the first soil pressing part to hang off the soil layer of the first side wall of the continuous wall casting groove during the lifting process; 5. In the present application, the second sealing ring cooperates with the sealing cavity to perform a second seal between the second telescopic rod and the second through hole, and the second flexible sealing tube cooperates with the sealing cavity to perform a second seal between the second telescopic rod and the second through hole. The double seal makes it difficult for the second telescopic member to contact the mud, thereby increasing the service life of the main lifting member; 6. The second upper guide part and the second lower guide part in the present application make it difficult for the second soil pressing part to fall off the soil layer of the second side groove wall of the continuous wall casting groove during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a flow chart of the construction method of ultra-deep underground continuous wall in a water-rich, thick and soft soil layer close to a river or sea; Figure 2 It is a three-dimensional structural schematic diagram of a slotting machine; Figure 3 yes Figure 2 A schematic diagram of the structural breakdown of the first soil compacting mechanism; Figure 4 yes Figure 3 Schematic diagram of the first telescopic member; Figure 5 yes Figure 2 Schematic diagram of the structural breakdown of the second soil compacting mechanism; Figure 6 yes Figure 5 Schematic diagram of the second telescopic member; Figure 7 yes Figure 2 A schematic diagram of the three-dimensional structure of the grooving mechanism; Figure 8 yes Figure 7 A schematic diagram of the assembly structure of the main lifting member, the bucket assembly and the stationary sleeve; Fig. 9 yes Figure 2 Schematic diagram of the assembly structure of the main lifting parts, bucket assembly and part of the movable sleeve.

[0029] Reference numerals: 1. Crane; 2. Frame; 20. Sealed cavity; 201. First groove; 2011. First through hole; 202. Second groove; 2021. Second through hole; 21. Outer rectangular tube; 22. Inner mounting tube; 23. Closing plate; 24. Inner support; 25. Outer support; 3. Grooving mechanism; 31. Main lifting member; 311. Main cylinder; 312. Main lifting rod; 32. Bucket assembly; 321. First bucket; 3211. First driven rod; 322. Second bucket; 3221. Second driven rod; 33. Main sealing assembly; 331. Stationary sleeve; 332. Movable sleeve; 333. Main sealing ring; 334. Main flexible sealing tube; 4 , the first soil-pressing mechanism; 41, the first soil-pressing plate; 411, the first soil-pressing part; 412, the first upper guide part; 413, the first lower guide part; 42, the first telescopic member; 421, the first cylinder body; 422, the first telescopic rod; 43, the first sealing assembly; 431, the first sealing ring; 432, the first flexible sealing tube; 5, the second soil-pressing mechanism; 51, the second soil-pressing plate; 511, the second soil-pressing part; 512, the second upper guide part; 513, the second lower guide part; 52, the second telescopic member; 521, the second cylinder body; 522, the second telescopic rod; 53, the second sealing assembly; 531, the second sealing ring; 532, the second flexible sealing tube. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-9 This application is described in further detail.

[0031] The embodiments of the present application disclose a method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer adjacent to a river or sea.

[0032] Reference Figure 1 , a method for constructing an ultra-deep underground continuous wall in a water-rich, thick soft soil layer close to a river or sea, a method for constructing an ultra-deep underground continuous wall in a water-rich, thick soft soil layer close to a river or sea, comprising the following steps; S1: excavate the foundation trench and cast the guide wall of the integral reinforced concrete structure on both sides of the trench opening; S2: injecting slurry into the foundation trench; S3: between the two guide walls, using a trenching machine to dig a continuous wall casting trench at the bottom of the foundation trench, and compacting the trench wall soil layer of the continuous wall casting trench by the trenching machine; S4: fabrication of steel cage; S5: placing the steel cage into the continuous wall casting trough; S6: pouring concrete into the continuous wall casting groove and solidifying it to form a continuous wall.

[0033] Reference Figure 1In the implementation mode of the present application, a foundation trench is excavated, and guide walls of an integral reinforced concrete structure are cast on both sides of the trench opening of the foundation trench. After injecting mud into the foundation trench, a continuous wall casting trench is dug out at the bottom of the trench of the foundation trench by a trenching machine, and the soil layer of the trench wall of the continuous wall casting trench is compacted by the trenching machine. A steel cage is hoisted into the continuous wall casting trench, and concrete is poured into the continuous wall casting trench and solidified to form a continuous wall. The present application improves the stability of the trench wall of the continuous wall casting trench by compacting the soil layer of the trench wall of the continuous wall casting trench.

[0034] Reference Figure 2 The trenching machine includes a crane 1, a frame 2, a trenching mechanism 3, a first soil compacting mechanism 4 and a second soil compacting mechanism 5. The crane 1 is connected to the frame 2, and the crane 1 is used to lift or lower or horizontally move the frame 2. The trenching mechanism 3 is installed on the frame 2 and extends relative to the bottom end of the frame 2. The trenching mechanism 3 is used to dig soil to form a trench. The first soil compacting mechanism 4 is telescopically installed on the side wall of the frame 2, and the first soil compacting mechanism 4 is used to compact the soil layer of the first side trench wall of the continuous wall casting trench. The second soil compacting mechanism 5 is telescopically installed on the side wall of the frame 2 away from the first soil compacting mechanism 4, and the second soil compacting mechanism 5 is used to compact the soil layer of the second side trench wall of the continuous wall casting trench. The first soil compacting mechanism 4 and the second soil compacting mechanism 5 are symmetrically arranged with the trenching mechanism 3 as the symmetry axis.

[0035] Reference Figure 2 In the embodiment of the present application, when excavating the continuous wall casting groove, the frame 2 is driven by the crane 1 to descend into the foundation groove, and the continuous wall casting groove is excavated at the bottom of the foundation groove by the groove digging mechanism 3. As the groove digging mechanism 3 continues to dig deeper into the soil layer, the depth of the continuous wall casting groove continues to deepen. During the excavation of the continuous wall casting groove, each time the groove digging mechanism 3 contacts the bottom of the continuous wall casting groove, the first soil pressing mechanism 4 and the second soil pressing mechanism 5 are extended away from the frame 2, the first soil pressing mechanism 4 presses the first side groove wall of the continuous wall casting groove to compact the soil layer of the first side groove wall of the continuous wall casting groove, and the second soil pressing plate 51 presses the second side groove wall of the continuous wall casting groove to compact the soil layer of the second side groove wall of the continuous wall casting groove, thereby improving the groove wall stability of the continuous wall casting groove.

[0036] Reference Figure 3 and Figure 4The first soil pressing mechanism 4 includes a first soil pressing plate 41, a plurality of first telescopic members 42 and a plurality of first sealing assemblies 43. The first soil pressing plate 41 includes a first soil pressing part 411, a first upper guide part 412 and a first lower guide part 413. The top of the first soil pressing part 411 is provided with a first upper guide part 412 inclined upward, and the bottom of the first soil pressing part 411 is provided with a first lower guide part 413 inclined downward. The first upper guide part 412 is connected to the top edge of the first soil pressing part 411, and the first lower guide part 413 is connected to the bottom edge of the first soil pressing part 411. Both the first upper guide part 412 and the first lower guide part 413 are inclined toward the frame 2. The first soil pressing part 411 is used to compact the soil layer of the first side wall of the continuous wall casting groove. The first upper guide part 412 and the first lower guide part 413 make it difficult for the first soil pressing part 411 to hang off the soil layer of the first side wall of the continuous wall casting groove during the lifting process.

[0037] Reference Figure 3 and Figure 4 The frame 2 includes an outer rectangular tube 21, an inner mounting tube 22, a sealing plate 23, an inner support 24, and an outer support 25. The outer rectangular tube 21 is vertically arranged, the top end of the outer rectangular tube 21 is closed, and the bottom end of the outer rectangular tube 21 is open. The inner mounting tube 22 is vertically arranged in the outer rectangular tube 21, the top end of the inner mounting tube 22 is closed, and the bottom end of the inner mounting tube 22 is open. A sealing plate 23 is connected between the bottom end of the inner mounting tube 22 and the inner side wall of the inner mounting tube 22. The outer side wall of the inner mounting tube 22, the inner side wall of the inner mounting tube 22 and the sealing plate 23 form a sealed cavity 20. An inner support 24 is arranged in the sealed cavity 20, and an outer support 25 is arranged in the outer rectangular tube 21 below the sealed cavity 20.

[0038] Reference Figure 3 and Figure 4 The frame 2 is provided with a sealing cavity 20, which is located outside the grooving mechanism 3. The outer wall of the outer rectangular tube 21 is provided with a plurality of first grooves 201, and the bottom of the first groove 201 is provided with a first through hole 2011, which is connected with the sealing cavity 20. The first telescopic member 42 is arranged in a one-to-one correspondence with the first through hole 2011, and the first telescopic member 42 is rotated in the sealing cavity 20, and the first telescopic member 42 is located in the first through hole 2011. The first soil pressing plate 41 is located on the side of the frame 2, and the first soil pressing part 411 is connected with the first telescopic member 42. A plurality of first sealing components 43 are connected between the first telescopic member 42 and the side wall of the frame 2, and the first sealing components 43 are arranged in a one-to-one correspondence with the first telescopic member 42, and the first sealing components 43 are used to seal the gap between the first telescopic member 42 and the hole wall of the first through hole 2011.

[0039] Reference Figure 3 and Figure 4In the embodiment of the present application, the first telescopic member 42 drives the first pressure plate 41 to move closer to or away from the frame 2 by telescoping. The sealing cavity 20 cooperates with the first sealing assembly 43 to seal the first telescopic member 42 and improve the service life of the first telescopic member 42.

[0040] Reference Figure 3 and Figure 4 The first telescopic member 42 includes a first cylinder body 421 and a first telescopic rod 422. The first cylinder body 421 is installed in the sealing chamber 20. The first telescopic rod 422 is movably installed in the first through hole 2011. One end of the first telescopic rod 422 away from the first cylinder body 421 is connected to the first pressure plate 41. The first sealing assembly 43 includes a plurality of first sealing rings 431 and a first flexible sealing tube 432. The plurality of first sealing rings 431 are installed between the hole wall of the first through hole 2011 and the side wall of the first telescopic rod 422. The first flexible sealing tube 432 is sleeved outside the first telescopic rod 422. The first end of the first flexible sealing tube 432 is connected to the first pressure plate 41, and the second end of the first flexible sealing tube 432 is connected to the frame 2.

[0041] Reference Figure 3 and Figure 4 The first cylinder 421 drives the first telescopic rod 422 to extend and retract, thereby driving the first pressure plate 41 to approach or move away from the frame 2. The first sealing ring 431 cooperates with the sealing cavity 20 to perform a first seal on the gap between the first telescopic rod 422 and the first through hole 2011, and the first flexible sealing tube 432 cooperates with the sealing cavity 20 to perform a second seal on the gap between the first telescopic rod 422 and the first through hole 2011. The double seal makes it difficult for the first telescopic member 42 to contact mud, thereby increasing the service life of the first telescopic member 42.

[0042] Reference Figure 5 and Figure 6The second soil pressing mechanism 5 includes a second soil pressing plate 51, a plurality of second telescopic members 52 and a plurality of second sealing assemblies 53. The second soil pressing plate 51 includes a second soil pressing portion 511, a second upper guide portion 512 and a second lower guide portion 513. The second upper guide portion 512 is connected to the top edge of the second soil pressing portion 511, and the second lower guide portion 513 is connected to the bottom edge of the second soil pressing portion 511. The top of the second soil pressing portion 511 is provided with a second upper guide portion 512 inclined upward, and the bottom of the second soil pressing portion 511 is provided with a second lower guide portion 513 inclined downward. Both the second upper guide portion 512 and the second lower guide portion 513 are inclined toward the frame 2. A plurality of second grooves 202 are provided on the outer wall of the outer rectangular tube 21, a second through hole 2021 is provided at the bottom of the second groove 202, the second through hole 2021 is communicated with the sealing cavity 20, the second telescopic member 52 is arranged in a one-to-one correspondence with the second through hole 2021, the second telescopic member 52 is arranged in the sealing cavity 20, the second telescopic member 52 is located in the second through hole 2021, the second soil pressing plate 51 is located on the side of the frame 2, the second soil pressing part 511 is connected to the second telescopic member 52, a plurality of second sealing components 53 are connected between the second telescopic member 52 and the side wall of the frame 2, the second sealing components 53 are arranged in a one-to-one correspondence with the second telescopic member 52, and the second sealing component 53 is used to seal the gap between the second telescopic member 52 and the hole wall of the second through hole 2021.

[0043] Reference Figure 5 and Figure 6 In the embodiment of the present application, the second telescopic member 52 drives the second soil pressing plate 51 to move closer to or away from the frame 2 by telescoping. The sealing cavity 20 cooperates with the second sealing assembly 53 to seal the second telescopic member 52 and improve the service life of the second telescopic member 52. The second soil pressing part 511 is used to compact the soil layer of the second side groove wall of the continuous wall casting groove. The second upper guide part 512 and the second lower guide part 513 make it difficult for the second soil pressing part 511 to hang off the soil layer of the second side groove wall of the continuous wall casting groove during the lifting process.

[0044] Reference Figure 5 and Figure 6 The second telescopic member 52 includes a second cylinder body 521 and a second telescopic rod 522. The second cylinder body 521 is installed in the sealing chamber 20. The second telescopic rod 522 is movably installed in the second through hole 2021. The end of the second telescopic rod 522 away from the second cylinder body 521 is connected to the second pressure plate 51. The second sealing assembly 53 includes a plurality of second sealing rings 531 and a second flexible sealing tube 532. The plurality of second sealing rings 531 are installed between the hole wall of the second through hole 2021 and the side wall of the second telescopic rod 522. The second flexible sealing tube 532 is sleeved outside the second telescopic rod 522. The first end of the second flexible sealing tube 532 is connected to the second pressure plate 51, and the second end of the second flexible sealing tube 532 is connected to the frame 2.

[0045] Reference Figure 5 and Figure 6 In the embodiment of the present application, the second cylinder 521 drives the first telescopic rod 422 to extend and retract, thereby driving the second soil pressing plate 51 to approach or move away from the frame 2. The second sealing ring 531 cooperates with the sealing cavity 20 to perform a second seal between the second telescopic rod 522 and the second through hole 2021. The second flexible sealing tube 532 cooperates with the sealing cavity 20 to perform a second seal between the second telescopic rod 522 and the second through hole 2021. The double sealing makes it difficult for the second telescopic member 52 to contact the mud, thereby increasing the service life of the main lifting member 31.

[0046] Reference Figure 7 , Figure 8 and Fig. 9 The grooving mechanism 3 includes a main lifting member 31 and a bucket assembly 32. The bucket assembly 32 includes a first bucket 321, a first driven rod 3211, a second bucket 322 and a second driven rod 3221. The first bucket 321 and the second bucket 322 are both located at the bottom end of the frame 2. One side of the bucket mouth of the first bucket 321 and one side of the bucket mouth of the second bucket 322 are both hinged to the frame 2. The main lifting member 31 is located on a side of the first bucket 321 and the second bucket 322 close to the top of the frame 2 and is connected to the frame 2. One end of the first driven rod 3211 is hinged to the bucket back of the first bucket 321, and the other end is hinged to the main lifting member 31. One end of the second driven rod 3221 is hinged to the bucket back of the second bucket 322, and the other end is hinged to the main lifting member 31. The main lifting member 31 is used to drive the first driven rod 3211 and the second driven rod 3221 to rise and fall, so that the first bucket 321 and the second bucket 322 are relatively opened and closed.

[0047] Reference Figure 7 , Figure 8 and Fig. 9 In the embodiment of the present application, when digging the continuous wall casting groove, the main lifting member 31 is first used to drive the first driven rod 3211 and the second driven rod 3221 to rise by ascending, so that the first bucket 321 and the second bucket 322 rotate upward, and the first bucket 321 and the second bucket 322 are relatively opened. The first bucket 321 and the second bucket 322 are contacted with the soil layer, and then the main lifting member 31 is used to drive the first driven rod 3211 and the second driven rod 3221 to descend by descending, so that the first bucket 321 and the second bucket 322 rotate downward, so that the first bucket 321 and the second bucket 322 gradually close relative to each other, and then the first bucket 321 and the second bucket 322 can dig the bottom of the foundation groove or the continuous wall casting groove downward. When the first bucket 321 and the second bucket 322 are closed, the excavated soil will be collected between the first bucket 321 and the second bucket 322, and then the crane 1 drives the frame 2 to rise and move to the designated position to discard the excavated soil.

[0048] Reference Figure 7 , Figure 8 and Fig. 9 The grooving mechanism 3 further includes a main sealing assembly 33, which includes a stationary sleeve 331, a movable sleeve 332, a main sealing ring 333 and a main flexible sealing tube 334. The stationary sleeve 331 is mounted on the frame 2, one end of the stationary sleeve 331 is closed and the other end has an opening, one end of the movable sleeve 332 is closed and the other end has an opening, the open end of the stationary sleeve 331 is movably inserted into the movable sleeve 332, the main sealing ring 333 is located between the stationary sleeve 331 and the movable sleeve 332, the main flexible sealing tube 334 is sleeved outside the stationary sleeve 331, and one end is connected to the stationary sleeve 331, and the other end is connected to the movable sleeve 332. The main lifting member 31 is located in the stationary sleeve 331, and one end is fixedly connected to the stationary sleeve 331, and the other end is fixedly connected to the movable sleeve 332, and is used to drive the movable sleeve 332 to move relative to the stationary sleeve 331. The bucket assembly 32 is connected to the movable sleeve 332 .

[0049] Reference Figure 7 , Figure 8 and Fig. 9 In the embodiment of the present application, the main sealing ring 333 cooperates with the stationary sleeve 331 and the movable sleeve 332 to perform the first sealing on the main lifting member 31. The main flexible sealing tube 334 cooperates with the stationary sleeve 331 and the movable sleeve 332 to perform the second sealing on the main lifting member 31. The double sealing makes it difficult for the main lifting member 31 to contact the mud, thereby increasing the service life of the main lifting member 31.

[0050] The implementation principle of the ultra-deep underground continuous wall construction method of the embodiment of the present application close to the river and the sea, rich in water, deep soft soil layer is as follows: The crane 1 drives the frame 2 to descend into the foundation trench, and the main lifting member 31 is operated, and the main cylinder 311 drives the main lifting rod 312 to rise, so that the first bucket 321 and the second bucket 322 rotate upward, so that the first bucket 321 and the second bucket 322 are relatively opened, and the first bucket 321 and the second bucket 322 contact the soil layer.

[0051] The first cylinder 421 and the second cylinder 521 extend synchronously, and the first cylinder 421 drives the first telescopic rod 422 to shorten, so that the first pressure plate 41 is away from the frame 2, and the second cylinder 521 drives the second telescopic rod 522 to shorten, so that the second pressure plate 51 is away from the frame 2. Then, the first pressure plate 41 presses the first side wall of the continuous wall casting groove to compact the soil layer of the first side wall of the continuous wall casting groove, and the second pressure plate 51 presses the second side wall of the continuous wall casting groove.

[0052] The main lifting member 31 is operated, and the main cylinder 311 drives the main lifting rod 312 to descend, so that the first bucket 321 and the second bucket 322 rotate downward, so that the first bucket 321 and the second bucket 322 gradually close relative to each other, and then the first bucket 321 and the second bucket 322 can dig downward to the bottom of the foundation trench or the continuous wall casting trench.

[0053] The first cylinder body 421 and the second cylinder body 521 are shortened synchronously to reset the first and second soil pressing plates 41 and 51, and then the crane 1 drives the frame 2 to rise and move to a designated position to discard the excavated soil.

[0054] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for constructing ultra-deep underground continuous walls in a water-rich, thick, soft soil layer close to a river or sea, characterized by: The steps include: S1: excavate the foundation trench and cast the guide wall of the integral reinforced concrete structure on both sides of the trench opening; S2: injecting slurry into the foundation trench; S3: between the two guide walls, using a trenching machine to dig a continuous wall casting trench at the bottom of the foundation trench, and compacting the trench wall soil layer of the continuous wall casting trench by the trenching machine; S4: fabrication of steel cage; S5: placing the steel cage into the continuous wall casting trough; S6: pouring concrete into the continuous wall casting groove and solidifying it to form a continuous wall.

2. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 1, characterized in that: The trenching machine comprises a crane (1), a frame (2), a trenching mechanism (3), a first soil compacting mechanism (4) and a second soil compacting mechanism (5); the top end of the frame (2) is connected to the crane (1), and the crane (1) is used to lift or lower the frame (2); The groove digging mechanism (3) is mounted on the frame (2) and extends out relative to the bottom end of the frame (2); The first soil compacting mechanism (4) is telescopically mounted on the side wall of the frame (2); The second soil pressing mechanism (5) is telescopically mounted on a side wall of the frame (2) away from the first soil pressing mechanism (4).

3. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 2, characterized in that: The grooving mechanism (3) comprises a main lifting member (31) and a bucket assembly (32); the bucket assembly (32) comprises a first bucket (321), a first driven rod (3211), a second bucket (322) and a second driven rod (3221); the first bucket (321) and the second bucket (322) are both located at the bottom end of the frame (2); one side of the bucket opening of the first bucket (321) and one side of the bucket opening of the second bucket (322) are both hinged to the frame (2); the main lifting member (31) is located between the first bucket (321) and the second bucket (322) ) is located on one side close to the top of the frame (2) and is connected to the frame (2); one end of the first driven rod (3211) is hinged to the back of the first bucket (321), and the other end is hinged to the main lifting member (31); one end of the second driven rod (3221) is hinged to the back of the second bucket (322), and the other end is hinged to the main lifting member (31); the main lifting member (31) is used to drive the first driven rod (3211) and the second driven rod (3221) to rise and fall, so that the first bucket (321) and the second bucket (322) are relatively opened and closed.

4. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 3, characterized in that: The grooving mechanism (3) further comprises a main sealing assembly (33), the main sealing assembly (33) comprising a stationary sleeve (331), a movable sleeve (332), a main sealing ring (333) and a main flexible sealing tube (334); the stationary sleeve (331) is mounted on the frame (2); one end of the stationary sleeve (331) is closed and the other end has an opening; one end of the movable sleeve (332) is closed and the other end has an opening; the open end of the stationary sleeve (331) is movably inserted into the movable sleeve (332); the main sealing ring (333) is located between the stationary sleeve (331) and the movable sleeve (332); the main flexible sealing tube (334) is sleeved outside the stationary sleeve (331), one end of which is connected to the stationary sleeve (331) and the other end of which is connected to the movable sleeve (332); The main lifting member (31) is located in the stationary sleeve (331), and one end is fixedly connected to the stationary sleeve (331), and the other end is fixedly connected to the movable sleeve (332), and is used to drive the movable sleeve (332) to move relative to the stationary sleeve (331); The bucket assembly (32) is connected to the movable sleeve (332).

5. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 2, characterized in that: The frame (2) is provided with a sealing cavity (20), a cavity wall of the sealing cavity (20) is provided with a plurality of first through holes (2011), the first soil pressing mechanism (4) comprises a first soil pressing plate (41), a plurality of first telescopic members (42) and a plurality of first sealing assemblies (43), the first telescopic members (42) being arranged in a one-to-one correspondence with the first through holes (2011), the first telescopic members (42) being installed in the sealing cavity (20) and being partially located in the first through holes (2011), the first soil pressing plate (41) being located on the side of the frame (2), the first soil pressing plate (41) being connected to the first telescopic members (42), the first sealing assemblies (43) being arranged in a one-to-one correspondence with the first telescopic members (42), and the first sealing assemblies (43) being used to seal the gap between the first telescopic members (42) and the hole wall of the first through holes (2011).

6. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 5, characterized in that: The first telescopic member (42) comprises a first cylinder body (421) and a first telescopic rod (422); the first cylinder body (421) is installed in the sealed cavity (20); the first telescopic rod (422) is movably installed in the first through hole (2011); and one end of the first telescopic rod (422) away from the first cylinder body (421) is connected to the first soil pressing plate (41); The first sealing assembly (43) comprises a plurality of first sealing rings (431) and a first flexible sealing tube (432); the plurality of first sealing rings (431) are installed between the hole wall of the first through hole (2011) and the side wall of the first telescopic rod (422); the first flexible sealing tube (432) is sleeved outside the first telescopic rod (422); the first end of the first flexible sealing tube (432) is connected to the first soil pressing plate (41); and the second end of the first flexible sealing tube (432) is connected to the frame (2).

7. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 6, characterized in that: The first soil pressing plate (41) comprises a first soil pressing portion (411), a first upper guide portion (412) and a first lower guide portion (413); the first soil pressing portion (411) is connected to an end of the first telescopic rod (422) away from the first cylinder body (421); the first upper guide portion (412) is connected to a top edge of the first soil pressing portion (411); the first lower guide portion (413) is connected to a bottom edge of the first soil pressing portion (411); and the first upper guide portion (412) and the first lower guide portion (413) are both arranged to be inclined toward the frame (2).

8. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 5, characterized in that: A plurality of second through holes (2021) are provided on the cavity wall of the sealing cavity (20); the second soil pressing mechanism (5) comprises a second soil pressing plate (51), a plurality of second telescopic members (52) and a plurality of second sealing assemblies (53); the second telescopic members (52) are arranged in a one-to-one correspondence with the second through holes (2021); the second telescopic members (52) are installed in the sealing cavity (20) and are partially located in the second through holes (2021); the second soil pressing plate (51) is located on the side of the frame (2); the second soil pressing plate (51) is connected to the second telescopic members (52); the second sealing assemblies (53) are arranged in a one-to-one correspondence with the second telescopic members (52); and the second sealing assemblies (53) are used to seal the gap between the second telescopic members (52) and the hole wall of the second through hole (2021).

9. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 8, characterized in that: The second telescopic member (52) comprises a second cylinder body (521) and a second telescopic rod (522); the second cylinder body (521) is installed in the sealed cavity (20); the second telescopic rod (522) is movably installed in the second through hole (2021); and one end of the second telescopic rod (522) away from the second cylinder body (521) is connected to the second soil pressing plate (51); The second sealing assembly (53) comprises a plurality of second sealing rings (531) and a second flexible sealing tube (532); the plurality of second sealing rings (531) are installed between the hole wall of the second through hole (2021) and the side wall of the second telescopic rod (522); the second flexible sealing tube (532) is sleeved outside the second telescopic rod (522); the first end of the second flexible sealing tube (532) is connected to the second soil pressing plate (51); and the second end of the second flexible sealing tube (532) is connected to the frame (2).

10. The method for constructing an ultra-deep underground continuous wall in a water-rich, thick, soft soil layer close to a river or sea according to claim 9, characterized in that: The second soil pressing plate (51) comprises a second soil pressing portion (511), a second upper guide portion (512) and a second lower guide portion (513); the second soil pressing portion (511) is connected to an end of the second telescopic rod (522) away from the second cylinder body (521); the second upper guide portion (512) is connected to a top edge of the second soil pressing portion (511); the second lower guide portion (513) is connected to a bottom edge of the second soil pressing portion (511); and the second upper guide portion (512) and the second lower guide portion (513) are both arranged to be inclined toward the frame (2).

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