A cement-soil retaining wall foundation pit anti-settlement structure and construction method in soft soil areas

Abstract

This invention discloses a cement-soil retaining wall foundation pit anti-settlement structure and construction method in soft soil areas, belonging to the field of cement-soil retaining wall anti-settlement. The invention includes an outer shell, with fixed seats on both sides of the outer shell. Movable insert rods are provided on one side of each of the two fixed seats. A row of support plates is provided at both the front and rear ends of the lower part of the inner shell. This invention solves the problem that in existing anti-settlement structures, when supported by springs and with the support blocks in contact with the soil, the support blocks inside the anti-settlement structure cannot be adjusted horizontally, and the horizontal position of the support blocks cannot be adjusted to adapt to the installation position of the anti-settlement structure. This invention uses the rotation of the threaded rod and the relative movement generated inside the transmission ring, which, after being connected by springs, drives the support plates to adjust their horizontal position, thus adapting to installation and adaptation in soft soil areas.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cement-soil retaining wall anti-settling, in particular to a cement-soil retaining wall foundation pit anti-settling structure and construction method in soft soil area. BACKGROUND

[0002] The foundation pit anti-settling structure refers to a series of engineering structures and measures designed in the foundation pit formed by underground excavation to prevent the settlement of the soil at the bottom or around the foundation pit caused by soil movement, underground water changes or other geological factors, which may include underground continuous walls and support systems and other measures, and the main purpose of these measures is to maintain the stability of the foundation pit and prevent safety problems caused by settlement or influence on surrounding buildings, roads and underground pipelines;

[0003] The patent with publication number CN212926079U discloses a pipeline foundation pit anti-settling structure, which comprises connecting rods two, springs one are sleeved on the lower parts of the connecting rods two, the bottom ends of the springs one are fixedly connected with the top ends of adjacent limiting plates one, and the top ends of the springs one are fixed with the top end inner walls of accommodating grooves three. When the foundation pit settles, the support blocks at the settlement position move downward under the action of the reaction force of the springs one. At this time, the springs one first push the limiting plates one to move downward, so that the limiting plates one push the connecting rods one to move downward, and then the connecting rods one push the support blocks to move downward, so that the support blocks always abut against the pit bottom, thereby effectively reducing the bearing capacity of the inserted rods.

[0004] When the anti-settling structure supports through the springs and contacts the soil through the support blocks, the support blocks inside the anti-settling structure cannot be adjusted in the horizontal position, and the installation position of the anti-settling structure cannot be adapted by adjusting the horizontal position of the support blocks. SUMMARY

[0005] The purpose of the present application is to provide a cement-soil retaining wall foundation pit anti-settling structure and construction method in soft soil area.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] A cement-soil retaining wall foundation pit anti-settling structure in soft soil area, comprising an outer shell, two sides of the outer shell are provided with fixed seats, and one side of the outer shell of each fixed seat is provided with an inserted rod which can move.

[0008] The front and rear ends of the lower end of the outer shell are each provided with a row of support pieces, and the middle of the upper end of the two rows of support pieces is provided with a movable rod, one side of the outer shell of the movable rod is provided with a transmission piece, and the top of the movable rod is provided with a limiting block, the limiting block is used to limit the limit downward amount of the transmission piece, and a spring is arranged between the transmission piece and the support piece.

[0009] The inner part of the transmission piece is connected with the outer part of the sliding clamping groove of the movable rod, the two ends of the spring are respectively welded and fixed between the transmission piece and the supporting piece, the middle position of the transmission piece is provided with a transmission ring, a threaded rod is arranged through the inner part of the transmission ring, the outer part of the threaded rod is in threaded cooperation with the inner part of the transmission ring, and the top of the threaded rod is provided with a transmission disc rotatingly arranged at the top of the shell;

[0010] The outer part of the supporting piece is provided with an adjusting cavity, and the adjusting cavity extends through and reaches the upper and lower ends of the bottom of the shell.

[0011] The two sides of the inner part of the shell are provided with first adaptive grooves, the lower ends of the two first adaptive grooves are provided with recessed second adaptive grooves, one side of each of the second adaptive grooves is provided with a mounting cavity, and the inner part of the mounting cavity is provided with a fixed piece.

[0012] The lower end of the fixed piece is provided with an embedded block, and the embedded block is welded and fixed with the shell, and the lower end of the fixed piece extends to the lower end of the embedded block through the anti-settling piece.

[0013] In the above scheme, the outer part of the fixed piece is connected with the inner part of the sliding clamping groove of the mounting cavity.

[0014] The included angle between the anti-settling piece and the insertion rod is forty-five degrees.

[0015] The lower end of the embedded block is recessed on both sides of the outer part of the embedded block, and the lower end of the outer part of the anti-settling piece is recessed.

[0016] In the above scheme, the bottom of the supporting piece is provided with a lower supporting cylinder and an upper connecting rod, the upper connecting rod is fixed to the bottom surface of the supporting piece, the lower supporting cylinder is provided with an inner expansion cylinder and an outer probe, the outer probe is provided with an anchor body, the inner expansion cylinder is provided with an outer expansion part, the outer expansion part is used for pushing the anchor body out of the outer probe, and a one-way feeding structure is arranged between the inner expansion cylinder and the lower supporting cylinder to limit the downward movement of the inner expansion cylinder.

[0017] The bottom of the upper connecting rod is inserted into the lower supporting cylinder, and a reverse stop structure is arranged between the two to limit the downward movement of the upper connecting rod.

[0018] In the above scheme, the outer side of the inner expansion cylinder is provided with a limiting wedge groove one, the outer side of the upper connecting rod is provided with a limiting wedge groove two, the side of the lower supporting cylinder is provided with an elastic locking pin one and an elastic locking pin two, the limiting wedge groove one and the elastic locking pin one are positionally corresponding and adaptive, and the limiting wedge groove two and the elastic locking pin two are positionally corresponding and adaptive.

[0019] In the above scheme, both the first elastic locking pin and the second elastic locking pin include a fixed sleeve and a locking block that is slidably fitted in the fixed sleeve via an elastic body. One end of the locking block extends to the outside of the fixed sleeve and is adapted to the corresponding limiting wedge groove.

[0020] Among them, the top depth of the first limiting wedge groove is greater than the bottom depth, and the top depth of the second limiting wedge groove is greater than the bottom depth.

[0021] In the above scheme, a connecting ring is fitted on the outer side of the upper connecting rod, and the connecting ring and the upper connecting rod are fitted together internally and externally. Geotextile is clamped and installed on the connecting ring, and the geotextile is embedded in the backfill soil layer.

[0022] In the above scheme, the inner side of the connecting ring is provided with a locking groove, and an elastic connecting claw is fitted in the locking groove. The elastic connecting claw is installed on the outer side of the upper connecting rod.

[0023] In the above scheme, the connecting ring includes a lower ring plate and an upper ring plate. The top of the lower ring plate is provided with an upper edge cylinder that is centered and extends upward, and an anti-detachment ring groove located outside the upper edge cylinder. The bottom surface of the upper ring plate is provided with an annular snap, an anti-detachment ring body located outside the annular snap, and an annular elastic pressure plate located outside the anti-detachment ring body. The annular snap and the upper edge cylinder are engaged. The anti-detachment ring body is engaged in the anti-detachment ring groove to fix the geotextile. The annular elastic pressure plate is used to press the geotextile before the anti-detachment ring body and the anti-detachment ring groove are engaged.

[0024] Construction method for cement-soil retaining wall foundation pit anti-settlement structure in soft soil areas includes the following steps:

[0025] Step 1, Backfill soil layer

[0026] 11) Clean and level the base, backfill with soil and level and compact it to obtain a backfill layer with a thickness of 10-15cm;

[0027] 12) Lay geotextile flat on the backfill layer, use a total station to mark the opening positions on the geotextile, open the holes at the opening positions, and carry out preliminary excavation work at the opening positions. Install the connecting ring at the opening positions. First install the lower ring plate, which adopts a split structure. Then install the upper ring plate, which is fitted by the upper edge cylinder and the ring-shaped clamp. At the same time, fix the geotextile between the anti-detachment ring body and the anti-detachment ring groove. Cover the upper ring plate with plastic film.

[0028] 13) Backfill the soil on the geotextile and level and compact it;

[0029] 14) Repeat steps 11) to 13) until the design elevation;

[0030] Step 2, Excavation and Drilling

[0031] At the top surface of the backfill layer, the opening position is marked by using a total station instrument to lay out a line, the opening operation is carried out at the opening position, and preliminary excavation operation is carried out on the opening position, and at least the length of a lower supporting cylinder below the bottom layer of geotextile is excavated;

[0032] Step 3, anti-settling structure installation

[0033] The lower supporting cylinder is aligned with the excavated hole, the lower supporting cylinder is pressed downward, the inner expansion cylinder is hindered by the hole bottom and moves upward, the anchor body is pushed out of the outer probe and anchored in the earth through the outer expansion part, and the elastic connecting claw enters the clamping groove to complete the connection of the connecting ring and the upper connecting rod, at this time, the insertion rod is extended from the fixed seat and embedded in the interior of the foundation pit;

[0034] While the shell is installed, the second adaptive arc outside the anti-settling piece moves towards the soil and is inclined towards the embedding block, the anti-settling piece penetrates through the embedding block and is embedded into the earth below the lower end of the embedding block, and in the process of installing the anti-settling piece, the fixing piece at the upper end of the anti-settling piece is embedded into the installation cavity on one side of the second adaptive groove, the bolt is embedded into the interior of the shell through the fixing piece and the fixing of the anti-settling piece is completed.

[0035] Compared with the prior art, the beneficial effects of the present application are as follows:

[0036] After the two ends of the shell are embedded into the interior of the foundation pit and the shell is fixed by the insertion rod, the anti-settling piece is inclined and slid into the installation cavity, and when the anti-settling piece is slid through the embedding block and embedded into the soft soil after being inserted into the installation cavity, the inclined anti-settling piece can limit the soft soil at the embedded position of the lower end, so that the position of the shell is prevented from deviating after the shell is installed and placed, the recesses and protrusions of the soft soil can be further adapted by the inclined anti-settling piece, the shell is kept in a horizontal state to stably support the upper end cement soil retaining wall, and the stability of the support is improved.

[0037] The bottom of the shell can adjust the initial supporting degree of the supporting piece by adjusting the height of the transmission piece, cooperating with the spring and the movable rod in the interior, and the self-adapting telescopic supporting structure is adopted in the area below the geotextile to realize the operation of local supporting, so that the problem of uneven settlement below the hardness is solved, when local settlement occurs, the anchor body can complete the operation of being connected with local subsidence when the earth settlement occurs, effective support is realized by the lower supporting cylinder and the upper connecting rod after subsidence, and the structure at the top is prevented from being cracked due to settlement. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a perspective view of the overall external structure of the present application;

[0039] Figure 2Supporting sheet position relation diagram of the present application;

[0040] Figure 3 Internal structure sectional view of the shell of the present application;

[0041] Figure 4 Supporting sheet position relation diagram of the present application Figure 3 A region in the middle is a partial enlarged view;

[0042] Figure 5 Supporting sheet position relation diagram of the present application Figure 3 B region in the middle is a partial enlarged view;

[0043] Figure 6 Supporting sheet position relation diagram of the present application

[0044] Figure 7 Anti-settling sheet and supporting sheet bearing earth force schematic diagram of the present application;

[0045] Figure 8 Construction condition diagram of example 2;

[0046] Figure 9 B region in the middle is a partial enlarged view; Figure 8 B region in the middle is a partial enlarged view;

[0047] Figure 10 Anti-settling ring groove and anti-settling ring body fitting state diagram in the present application; Figure 9

[0048] Lower supporting cylinder and upper connecting rod, inner expanding cylinder position relation diagram in the present application; Figure 11 Figure 8 Elastic locking pin structure schematic diagram in the present application;

[0049] Figure 12 Figure 11 Lower ring disc structure schematic diagram in the present application.

[0050] Figure 13 Lower ring disc structure schematic diagram in the present application.

[0051] ​​In the diagram: 1. Outer shell; 2. Fixing base; 3. Insert rod; 4. Transmission disc; 5. First adapter groove; 6. Second adapter groove; 7. Fixing plate; 8. Embedded block; 9. First adapter arc; 10. Anti-settlement plate; 11. Second adapter arc; 12. Support plate; 121. Lower support cylinder; 122. Upper connecting rod; 123. Inner expansion cylinder; 124. Outer protrusion; 125. Anchor body; 127. Elastic locking pin one; 1271. Fixing sleeve; 1272. Elastic body; 1273. 128. Locking block; 1292. Elastic locking pin II; 1293. Elastic connecting claw; 1294. Lower ring plate; 1295. Upper edge cylinder; 1296. Anti-detachment ring groove; 1297. Upper ring plate; 1298. Annular bayonet; 1299. Anti-detachment ring body; 1299. Annular elastic pressure plate; 13. Outer expansion part; 14. Adjustment cavity; 15. Transmission plate; 16. Mounting cavity; 17. Movable rod; 18. Spring; 19. Transmission ring; 20. Threaded rod; 21. Geotextile. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] To address the problem that existing anti-settlement structures, when supported by springs and with support blocks in contact with the soil, cannot adjust the horizontal position of the support blocks to adapt to the installation location of the anti-settlement structure, this embodiment provides the following technical solution:

[0054] Example 1, as Figures 1 to 7 As shown, a cement-soil retaining wall foundation pit anti-settlement structure in soft soil areas includes an outer shell 1. Fixed seats 2 are provided on both sides of the outer shell 1, and movable insert rods 3 are provided on one side of the outer shell 2.

[0055] A row of support plates 12 is provided at both the front and rear ends of the lower end of the outer shell 1. A movable rod 17 is provided in the middle of the upper end of the two rows of support plates 12. A transmission plate 15 is provided on one side of the outer side of the movable rod 17, and a limit block is provided at the top of the movable rod 17. The limit block is used to limit the maximum downward movement of the transmission plate 15. A spring 18 is provided between the transmission plate 15 and the support plate 12.

[0056] The inner part of the transmission piece 15 is connected with the outer part of the sliding clamping groove of the movable rod 17, the two ends of the spring 18 are respectively welded and fixed between the transmission piece 15 and the supporting piece 12, the middle position of the transmission piece 15 is provided with a transmission ring 19, the inner part of the transmission ring 19 is provided with a threaded rod 20, and the outer part of the threaded rod 20 is screwed with the inner part of the transmission ring 19, and the top of the threaded rod 20 is provided with a transmission disc 4 rotatingly arranged at the top of the shell 1.

[0057] The outer part of the supporting piece 12 is provided with an adjusting cavity 14, and the adjusting cavity 14 extends to the upper and lower ends of the bottom of the shell 1;

[0058] The two sides of the inner part of the shell 1 are provided with first adaptive grooves 5, the lower ends of the two first adaptive grooves 5 are provided with recessed second adaptive grooves 6, one side of the second adaptive groove 6 is provided with a mounting cavity 16, and the inner part of the mounting cavity 16 is provided with a fixed piece 7;

[0059] The lower end of the fixed piece 7 is provided with an embedded block 8, and the embedded block 8 is welded and fixed with the shell 1, and the lower end of the fixed piece 7 penetrates the embedded block 8 and extends to the lower end of the embedded block 8 through the anti-settling piece 10.

[0060] The outer part of the fixed piece 7 is connected with the inner part of the mounting cavity 16 through the sliding clamping groove;

[0061] The included angle between the anti-settling piece 10 and the plug rod 3 is forty-five degrees;

[0062] The outer lower end of the embedded block 8 is recessed on both sides to form a first adaptive arc 9, and the lower end of the outer part of the anti-settling piece 10 is recessed to form a second adaptive arc 11.

[0063] In the implementation, the plug rod 3 is used to extend from the fixed seat 2 into the embedded foundation pit to complete the installation of the shell 1, and the spring 18 is pre-compressed by rotating the transmission disc 4 after installation, so that the supporting piece 12 can be pressed on the underlying earthwork, and when the underlying soil layer appears uneven settlement, it can automatically compensate into the earthwork to support. The anti-settling piece 10 extends obliquely downward into the underlying earthwork to achieve the effect of anchoring, avoid large-area settlement at the bottom, and improve the overall stability of the shell 1.

[0064] In the implementation, the plug rod 3 is used to extend from the fixed seat 2 into the embedded foundation pit to complete the installation of the shell 1, and the spring 18 is pre-compressed by rotating the transmission disc 4 after installation, so that the supporting piece 12 can be pressed on the underlying earthwork, and when the underlying soil layer appears uneven settlement, it can automatically compensate into the earthwork to support. The anti-settling piece 10 extends obliquely downward into the underlying earthwork to achieve the effect of anchoring, avoid large-area settlement at the bottom, and improve the overall stability of the shell 1.

[0065] As Figures 8 to 11As shown, the bottom of the support sheet 12 is provided with a lower support cylinder 121 and an upper connecting rod 122, the upper connecting rod 122 is fixed on the bottom surface of the support sheet 12, the lower support cylinder 121 is internally provided with an inner inflation cylinder 123, the side is provided with an outer probe 124, the outer probe 124 is internally horizontally provided with an anchor 125, the inner inflation cylinder 123 is provided with an outer inflation part 13, the outer inflation part 13 is used for pushing the anchor 125 out of the outer probe 124, a one-way feeding structure is arranged between the inner inflation cylinder 123 and the lower support cylinder 121 for limiting the downward movement of the inner inflation cylinder 123.

[0066] The bottom of the upper connecting rod 122 is inserted into the lower support cylinder 121 and a reverse retreat prevention structure is arranged between the two for limiting the downward movement of the upper connecting rod 122.

[0067] The outer side of the inner inflation cylinder 123 is provided with a limiting wedge groove one, the outer side of the upper connecting rod 122 is provided with a limiting wedge groove two, the side of the lower support cylinder 121 is provided with an elastic locking pin one 127 and an elastic locking pin two 128, the limiting wedge groove one and the elastic locking pin one 127 are positionally corresponding and adapted, and the limiting wedge groove two and the elastic locking pin two 128 are positionally corresponding and adapted.

[0068] The elastic locking pin one 127 and the elastic locking pin two 128 each include a fixed sleeve 1271 and a locking block 1273 slidingly fitted into the fixed sleeve 1271 through an elastic body 1272, one end of the locking block 1273 extends to the outside of the fixed sleeve 1271 and is adapted with the corresponding limiting wedge groove;

[0069] Among them, the top depth of the limiting wedge groove one is greater than the bottom depth, and the top depth of the limiting wedge groove two is greater than the bottom depth.

[0070] The outer side of the upper connecting rod 122 is sleeved with a connecting ring, the connecting ring and the upper connecting rod 122 are internally and externally clamped and fitted, the connecting ring is clamped and installed with a geotextile 21, and the geotextile 21 is pre-buried in the backfill soil layer.

[0071] The inner side of the connecting ring is provided with a clamping groove, the clamping groove is fitted with an elastic connecting claw 1292, and the elastic connecting claw 1292 is installed on the outer side of the upper connecting rod 122.

[0072] The connecting ring comprises a lower ring disc 1293 and an upper ring disc 1294, the top of the lower ring disc 1293 is provided with a central upward extending upper edge cylinder 12931 and a anti-off ring groove 12932 outside the upper edge cylinder, the bottom of the upper ring disc 1294 is provided with a ring-shaped clasp 12941, an anti-off ring body 12942 outside the ring-shaped clasp 12941 and a ring-shaped elastic pressing plate 12943 outside the anti-off ring body 12942, the ring-shaped clasp 12941 and the upper edge cylinder 12931 are clamped and matched, the anti-off ring body 12942 is matched in the anti-off ring groove 12932 from top to bottom for fixing the geotechnical cloth 21, the anti-off ring body 12942 is a ring-shaped body structure with a certain elastic deformation in cross-section in the shape of an eight character, the bottom of the anti-off ring body 12942 is expanded to both sides after matching to realize fixing the geotechnical cloth 21 in the anti-off ring groove 12932, realizing cooperation operation, the ring-shaped elastic pressing plate 12943 is used for pressing the geotechnical cloth 21 before the anti-off ring body 12942 is matched with the anti-off ring groove 12932.

[0073] In the installation, the connecting ring is penetrated through the lower support cylinder 121 until extending to the bottom of the lowermost geotechnical cloth 21, the inner expansion cylinder 123 can be raised by the process of pressing down, the anchor body 125 is anchored in the earthwork by the outer expansion part 13, when uneven settlement appears below the geotechnical cloth 21, the earthwork drives the lower support cylinder 121 to go down, so that the lower support cylinder 121 is matched with the upper connecting rod 122 to form a new support, thereby being able to ensure that the backfill layer on the geotechnical cloth 21 does not have settlement problem. After installation, the elastic connecting claw 1292 can be matched on the connecting ring on the geotechnical cloth 21, so that the upper connecting rod 122 and the connecting ring are adapted to form an integral whole.

[0074] A construction method of a cement soil retaining wall foundation pit anti-settlement structure in soft soil area, comprising:

[0075] Step 1, backfill soil layer

[0076] 11) clean the base and level it, backfill the earthwork and level it and compact it to obtain a backfill layer with a thickness of 10-15 cm;

[0077] 12) lay the geotechnical cloth 21 on the backfill layer, mark the opening position on the geotechnical cloth 21 by using the total station, open the hole at the opening position and make preliminary excavation operation at the opening position, install the connecting ring at the opening position, first install the lower ring disc 1293, the lower ring disc 1293 adopts a split type structure, as shown in Figure 13 , then install the upper ring disc 1294, clamp and match the upper edge cylinder 12931 and the ring-shaped clasp 12941, and clamp and fix the geotechnical cloth 21 between the anti-off ring body 12942 and the anti-off ring groove 12932, cover and shield the upper ring disc 1294 with a plastic film;

[0078] 13) Re-fill the earthwork on the geotextile 21 and level, compact;

[0079] 14) Repeat 11) to 13) to the design elevation;

[0080] Step 2, excavate the hole

[0081] Use the total station to mark the hole position on the top surface of the backfill layer, and perform the hole operation at the hole position, and perform the preliminary excavation operation at the hole position, at least to the length of the lower support cylinder 121 below the bottom layer of geotextile 21;

[0082] Step 3, installation of anti-settlement structure

[0083] Align the lower support cylinder 121 with the excavated hole, press the lower support cylinder 121 downward, the inner expansion cylinder 123 rises upward under the obstruction of the hole bottom, pushes the anchor body 125 out of the outer probe 124 through the outer expansion part 13, and the elastic connecting claw 1292 is embedded into the clamping groove, the connection of the connecting ring and the upper connecting rod 122 is completed, and at this time the insertion rod 3 is extended from the fixed seat 2 and embedded into the inside of the foundation pit;

[0084] At the same time as installing the outer shell 1, the second adaptive arc 11 outside the anti-settlement piece 10 moves towards the soil and is inclined towards the embedding block 8, the anti-settlement piece 10 penetrates the embedding block 8 and is embedded into the earthwork at the lower end of the embedding block 8, and in the process of installing the anti-settlement piece 10, the fixed piece 7 at the upper end of the anti-settlement piece 10 is embedded into the installation cavity 16 inside one side of the second adaptive groove 6, and the fixing of the anti-settlement piece 10 is completed by embedding the bolt into the inside of the outer shell 1 through the fixed piece 7.

[0085] It is to be understood that the terms such as first and second, and the like, are used herein merely to distinguish one entity or action from another, but do not necessarily require or imply such practical relationship or order between such entities or actions. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0086] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application.

Claims

1. A cement-soil retaining wall foundation pit anti-settlement structure in soft soil area, comprising an outer shell (1), both sides of the outer shell (1) are provided with a fixed seat (2), one side of the outer fixed seat (2) is provided with a movable inserting rod (3), characterized in that: both ends of the lower end of the inner shell (1) are provided with a row of support pieces (12), the upper end of the two rows of support pieces (12) is provided with a movable rod (17), one side of the outer movable rod (17) is provided with a transmission piece (15), and the top of the movable rod (17) is provided with a limiting block, the limiting block is used to limit the limit downward amount of the transmission piece (15), and a spring (18) is arranged between the transmission piece (15) and the support piece (12); the inner part of the transmission piece (15) and the outer part of the movable rod (17) are connected through a sliding clamping groove, both ends of the spring (18) are welded and fixed between the transmission piece (15) and the support piece (12), a transmission ring (19) is arranged at the middle position of the transmission piece (15), a threaded rod (20) is arranged through the inner part of the transmission ring (19), and the outer part of the threaded rod (20) is screwed with the inner part of the transmission ring (19), and the top of the threaded rod (20) is provided with a transmission disc (4) which is rotatably arranged at the top of the outer shell (1); the outer part of the support piece (12) is provided with an adjusting cavity (14), and the adjusting cavity (14) extends through and extends to the upper and lower ends of the bottom of the outer shell (1); both sides of the inner shell (1) are provided with a first adaptive groove (5), the lower end of the two first adaptive grooves (5) is provided with a concave second adaptive groove (6), one side of the second adaptive groove (6) is provided with a mounting cavity (16), and the inner part of the mounting cavity (16) is provided with a fixed piece (7); the lower end of the fixed piece (7) is provided with an embedded block (8), and the embedded block (8) is welded and fixed with the outer shell (1), the lower end of the fixed piece (7) penetrates the embedded block (8) and extends to the lower end of the embedded block (8) through an anti-settlement piece (10).

2. The water retaining structure of claim 1, wherein, the outer part of the fixed piece (7) and the inner part of the mounting cavity (16) are connected through a sliding clamping groove; the included angle between the anti-settlement piece (10) and the inserting rod (3) is forty-five degrees; the lower end of the outer part of the embedded block (8) is recessed to form a first adaptive arc (9), and the lower end of the outer part of the anti-settlement piece (10) is recessed to form a second adaptive arc (11).

3. The anti-settling structure of the cement-soil retaining wall in soft soil area according to claim 1, characterized in that, the bottom of the support piece (12) is provided with a lower support cylinder (121) and an upper connecting rod (122), the upper connecting rod (122) is fixed on the bottom surface of the support piece (12), the lower support cylinder (121) is provided with an inner expansion cylinder (123) and an outer probe (124), the outer probe (124) is provided with an anchor body (125), the inner expansion cylinder (123) is provided with an outer expansion part (13), the outer expansion part (13) is used to push the anchor body (125) out of the outer probe (124), a one-way feeding structure is arranged between the inner expansion cylinder (123) and the lower support cylinder (121) to limit the downward movement of the inner expansion cylinder (123). The bottom of the upper connecting rod (122) is inserted into the lower supporting cylinder (121), and a reverse retreat-preventing structure is arranged between the two to limit the downward movement of the upper connecting rod (122).

4. The anti-settling structure of the cement-soil retaining wall in soft soil area according to claim 3, characterized in that, The outer side of the inner expansion cylinder (123) is provided with a limiting wedge groove one, the outer side of the upper connecting rod (122) is provided with a limiting wedge groove two, and the side of the lower supporting cylinder (121) is provided with an elastic locking pin one (127) and an elastic locking pin two (128). The limiting wedge groove one and the elastic locking pin one (127) are in position correspondence and adaptation, and the limiting wedge groove two and the elastic locking pin two (128) are in position correspondence and adaptation.

5. The anti-settling structure of the cement-soil retaining wall in soft soil area according to claim 4, characterized in that, The elastic locking pin one (127) and the elastic locking pin two (128) each include a fixed sleeve (1271) and a locking block (1273) slidingly fitted into the fixed sleeve (1271) through an elastic body (1272). One end of the locking block (1273) extends to the outside of the fixed sleeve (1271) and is adapted to the corresponding limiting wedge groove. The top of the limiting wedge groove one has a greater depth than the bottom, and the top of the limiting wedge groove two has a greater depth than the bottom.

6. The anti-settling structure of the cement-soil retaining wall in soft soil area according to claim 5, characterized in that, The outer side of the upper connecting rod (122) is sleeved with a connecting ring, the connecting ring and the upper connecting rod (122) are in inner and outer clamping fit, the connecting ring is clamped and installed with a geotextile (21) thereon, and the geotextile (21) is pre-buried in the backfill layer.

7. The anti-settling structure of the cement-soil retaining wall in soft soil area according to claim 6, characterized in that, The inner side of the connecting ring is provided with a clamping groove, and the clamping groove is fitted with an elastic connecting claw (1292) installed on the outer side of the upper connecting rod (122).

8. The anti-settling structure of the cement-soil retaining wall in soft soil area according to claim 7, characterized in that, The connecting ring includes a lower ring disc (1293) and an upper ring disc (1294). The top of the lower ring disc (1293) is provided with a top edge cylinder (12931) extending upward at the center and a anti-disengagement ring groove (12932) located outside the top edge cylinder. The bottom surface of the upper ring disc (1294) is provided with a ring-shaped clamping groove (12941), an anti-disengagement ring body (12942) located outside the ring-shaped clamping groove (12941), and a ring-shaped elastic pressing plate (12943) provided outside the anti-disengagement ring body (12942). The ring-shaped clamping groove (12941) and the top edge cylinder (12931) are clamped and fitted, the anti-disengagement ring body (12942) is fitted in the anti-disengagement ring groove (12932) to fix the geotextile (21), and the ring-shaped elastic pressing plate (12943) is used to press the geotextile (21) before the anti-disengagement ring body (12942) is fitted with the anti-disengagement ring groove (12932).

9. The construction method of the settlement-preventing structure of the retaining wall of the cement-soil in the soft soil area according to claim 8, wherein The method comprises the following steps: Step 1, backfill layer 11) clean the base and level it, backfill the earthwork and level it, and then compact it to obtain a backfill layer with a thickness of 10-15 cm; 12) Lay the geotextile (21) on the backfill layer, use the total station to mark the opening position on the geotextile (21), open the hole at the opening position, and make a preliminary excavation at the opening position. Install the connecting ring at the opening position, first install the lower ring disc (1293) which adopts a split structure, then install the upper ring disc (1294) which is clamped and matched through the upper edge cylinder (12931) and the annular bayonet (12941), and at the same time, the geotextile (21) is clamped and fixed between the anti-dropping ring body (12942) and the anti-dropping ring groove (12932), and the upper ring disc (1294) is covered and shielded with plastic film; 13) Re-fill the earthwork on the geotextile (21) and level and compact it; 14) Repeat 11) to 13) to the design elevation; Step 2, drill hole excavation Use the total station to mark the opening position on the top surface of the backfill layer, open the hole at the opening position, and make a preliminary excavation at the opening position. At least excavate to the length of a lower support cylinder (121) below the bottom layer of geotextile (21); Step 3, anti-settlement structure installation Align the lower support cylinder (121) with the excavated hole, press the lower support cylinder (121) downward, the inner inflation cylinder (123) is hindered by the bottom of the hole and moves upward, the anchor body (125) is pushed out of the outer probe (124) and anchored in the earthwork through the outer inflation part (13), at the same time, the elastic connecting claw (1292) enters the clamping groove, completing the connection of the connecting ring and the upper connecting rod (122). At this time, the insertion rod (3) extends from the fixed seat (2) and is embedded in the foundation pit; At the same time as installing the outer shell (1), the second adaptive arc (11) on the outside of the anti-settlement piece (10) moves towards the soil and is inclined towards the embedding block (8). The anti-settlement piece (10) penetrates the embedding block (8) and is embedded in the earthwork at the lower end of the embedding block (8). During the installation of the anti-settlement piece (10), the fixed piece (7) at the upper end of the anti-settlement piece (10) is embedded in the installation cavity (16) on one side of the second adaptive groove (6). By passing through the fixed piece (7) and embedding it in the outer shell (1), the anti-settlement piece (10) is fixed.

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