A precast cushion for the bottom slab in silt geological conditions

Abstract

The present invention relates to the technical field of precast cushions, and specifically to a precast cushion for the bottom plate of silt geological strata, including: a precast cushion plate, a sealed connecting plate, an adjusting rotating groove, a second adjusting cylinder, a third adjusting shaft, a sealed slot and a sealed plug board; The beneficial effects are as follows: Through the cooperation of the first bevel gear at the other end of the first bevel gear and the second bevel gear at the upper end of the first adjusting shaft, the first adjusting shaft is driven to rotate. At this time, the rotation direction of the first adjusting shaft is opposite to the rotation direction of the third adjusting shaft, and through the opposite thread directions of the first adjusting cylinder and the first adjusting shaft and the third adjusting shaft and the second adjusting cylinder, the first adjusting shaft and the third adjusting shaft drive the upper precast cushion plate to be adjusted up and down in the same direction, thereby increasing the supporting strength of the upper precast cushion plate, and by adjusting the height of the precast cushion plate, height compensation is ensured when the precast cushion plate sinks during laying, which is convenient for ensuring the flatness of the cushion.

Description

Technical Field

[0001] The present invention relates to the technical field of precast cushions, and particularly to a precast cushion for the bottom plate of a silt geological formation. Background Art

[0002] Silty soil has the characteristics of low liquid limit, low permeability, and difficulty in drainage consolidation. It is easy to liquefy into silt when encountering water. Especially in the rainy season, continuous rain makes the bottom of the foundation pit covered with silt. Even with the effect of foundation pit dewatering, the dewatering speed is relatively slow, and the soil quality at a depth of about 300 mm in the shallow part of the pit bottom is still relatively soft. Usually, after the earth excavation is completed and gravel is laid, precast concrete slabs are installed. The precast concrete slabs are usually solidly cast, resulting in a relatively heavy overall weight, which is not only inconvenient for transportation and storage, but also due to the different degrees of softness and hardness of the soil at different positions during laying, the subsidence depths of the cushions laid at different positions are different, making it difficult to ensure the flatness of the cushion. Summary of the Invention

[0003] The purpose of the present invention is to provide a precast cushion for the bottom plate of a silt geological formation to solve the problem of difficulty in ensuring the flatness of the cushion.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A precast cushion for the bottom plate of a silt geological formation, comprising:

[0006] A precast cushion plate, which is divided into upper and lower layers and is hollow;

[0007] A sealing connecting plate, which is arranged on the outside between the upper and lower layers of the precast cushion plates and is connected to the lower precast cushion plate;

[0008] An adjusting rotating groove is opened at the top of the upper precast cushion plate;

[0009] A second adjusting cylinder is arranged at the top of the lower precast cushion plate and is located between the upper and lower layers of the precast cushion plates;

[0010] A third adjusting shaft, one end of which is threadedly connected to the second adjusting cylinder, and the other end passes through the upper precast cushion plate, and an adjusting rotating disc is arranged at the position of the third adjusting shaft corresponding to the adjusting rotating groove;

[0011] A sealing slot is opened at the top of the sealing connecting plate;

[0012] A sealing plug plate is slidably arranged in the sealing slot and is connected to the upper precast cushion plate at the top;

[0013] A second rotating groove is opened in the upper precast cushion plate;

[0014] A second rotating block is arranged at the position of the third adjusting shaft corresponding to the second rotating groove;

[0015] The ball bearings are provided with a plurality of them, and the plurality of ball bearings are circumferentially arranged at the bottom end of the adjusting turntable.

[0016] Preferably, a first adjusting cylinder is provided at the top end of the lower prefabricated cushion plate. There are a plurality of first adjusting cylinders, and they are circumferentially distributed outside the second adjusting cylinder. A first adjusting shaft is arranged inside the first adjusting cylinder. The first adjusting shaft is in threaded connection with the first adjusting cylinder, and the thread rotation directions of the first adjusting cylinder and the first adjusting shaft are opposite to the thread rotation directions of the third adjusting shaft and the second adjusting cylinder. A transmission component is arranged between the first adjusting shaft and the third adjusting shaft, and the third adjusting shaft drives the first adjusting shaft to rotate relative to the third adjusting shaft through the transmission component.

[0017] Preferably, a first rotating groove is formed in the upper prefabricated cushion plate. At the position corresponding to the first rotating groove of the first adjusting shaft, a first rotating block is arranged. The first rotating block is arranged in the first rotating groove, and the longitudinal cross-sections of the first rotating groove and the first rotating block are in a "T" shape structure.

[0018] Preferably, the transmission component includes a second bevel gear. The second bevel gear is arranged at the upper ends of the third adjusting shaft and the first adjusting shaft. A fixing frame is arranged between the third adjusting shaft and the first adjusting shaft. The top end of the fixing frame is connected to the upper prefabricated cushion plate. A second adjusting shaft is rotatably arranged at the lower end of the fixing frame. First bevel gears are connected to both ends of the second adjusting shaft, and the first bevel gears at both ends of the second adjusting shaft are respectively meshed with the corresponding second bevel gears.

[0019] Preferably, at least one set of connecting grooves is formed on the outer side of the sealing connecting plate. The connecting grooves include a first connecting groove and a second connecting groove. The first connecting groove and the second connecting groove are respectively arranged on both sides of the sealing connecting plate. There are a plurality of second connecting grooves. Connecting blocks are slidably arranged in the second connecting grooves, and a pushing component is arranged on the connecting blocks for pushing one end of the connecting blocks out of the second connecting grooves.

[0020] Preferably, a fixing groove is formed near the inner side of the second connecting groove of the connecting block, and a first elastic member is arranged in the fixing groove. The first elastic member includes a connecting spring. One end of the connecting spring is connected to the second connecting groove, and the other end is connected to the fixing groove, and the fixing groove is always in a stretched state.

[0021] Preferably, connecting limit grooves are formed at the upper and lower ends of the connecting block. At the position corresponding to the connecting limit grooves of the first connecting groove, a holding groove is formed, and a connecting limit block is slidably arranged in the holding groove. A second elastic member is arranged between the connecting limit block and the holding groove. The second elastic member includes a limit spring. One end of the limit spring is connected to the holding groove, and the other end is connected to the connecting limit block. An inclined surface is formed on the outer side of the connecting limit block.

[0022] Preferably, the pushing assembly includes a connecting shaft, which is arranged between the second connecting groove and the connecting block, and a third elastic member is arranged between the bottom end of the connecting shaft and the second connecting groove, the third elastic member includes a shaft spring, one end of the shaft spring is connected to the second connecting groove, and the other end is connected to the connecting shaft, and the shaft spring is always in a stretched state, the top end of the connecting shaft is arranged through the prefabricated pad of the upper layer, and a connecting groove is provided at the position of the prefabricated pad of the upper layer corresponding to the connecting shaft, a connecting shift block is provided in the connecting groove, the connecting shift block is arranged at the top end of the connecting shaft, and a shift finger groove is provided on one side of the connecting shaft, and a shaft shift rod is provided near the bottom end of the connecting shaft, the shaft shift rod is located between the connecting block and the second connecting groove, and the length of the shaft shift rod is equal to the depth of the second connecting groove.

[0023] Preferably, a toggle limit groove is provided at one end of the connecting rotating groove, and the toggle limit groove and the connecting shift block form an angle of ninety degrees.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention effectively reduces the weight of the prefabricated pads by means of a hollow prefabricated pad, which is convenient for transportation and delivery. By placing multiple prefabricated pads at the position to be laid, the height of the uneven prefabricated pads is adjusted after the placement is completed. The third adjusting shaft is driven to rotate by rotating the adjusting dial, and the third adjusting shaft is limited in rotation by the cooperation of the second rotating groove and the second rotating block. The multiple groups of balls arranged circumferentially reduce the friction force of the adjusting dial when it rotates, which makes it easier for the adjusting dial to rotate in the adjusting rotating groove. The second bevel gear sleeved on the upper end of the third adjusting shaft rotates, and the second bevel gear transmits the rotation to the second adjusting shaft by cooperating with the first bevel gear at one end of the second adjusting shaft. The first bevel gear at the other end of the shaft makes the first bevel gear at the other end of the first bevel gear cooperate with the second bevel gear at the upper end of the first adjusting shaft to drive the first adjusting shaft to rotate. At this time, the rotation direction of the first adjusting shaft is opposite to the rotation direction of the third adjusting shaft, and the thread rotation direction of the first adjusting cylinder and the first adjusting shaft is opposite to the thread rotation direction of the third adjusting shaft and the second adjusting cylinder, so that the first adjusting shaft and the third adjusting shaft drive the upper prefabricated pad to adjust in the same direction up and down, thereby increasing the supporting strength of the upper prefabricated pad, and by adjusting the height of the prefabricated pad, it is ensured that the height compensation of the prefabricated pad is performed when it sinks during laying, so as to ensure the flatness of the pad.

[0026] By turning the connecting block in the connecting rotating groove through the finger groove, the connecting rotating shaft is driven to rotate. At this time, the rotating shaft driving lever is driven by the connecting rotating shaft to rotate towards the connecting block. Then, the rotating shaft driving lever holds the connecting block to extend out of the second connecting groove. Until the connecting block rotates 90 degrees, the rotating shaft spring stretches and the connecting rotating shaft moves downward, so that the connecting block enters the finger limiting groove, thereby limiting the connecting rotating shaft and the rotating shaft driving lever. The connecting block extends out of the second connecting groove and enters the first connecting groove. When the connecting block contacts the inclined surface outside the connecting limiting block, the connecting limiting block is pressed into the holding groove. Until the connecting limiting groove is aligned with the fixing groove, the limiting spring holds the connecting limiting block into the connecting limiting groove, thereby limiting the connecting block, and thus connecting two precast cushion plates. By directly laying multiple groups of precast cushion plates and then connecting them, instead of connecting them first and then laying them, not only can the precast cushion plates at uneven places be adjusted in time, but also two precast cushion plates can be connected by turning, which speeds up the laying speed and ensures the flatness of the cushion layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 is a three-dimensional structural schematic diagram of the connecting rotating groove of the present invention;

[0029] Figure 3 is a sectional three-dimensional structural schematic diagram of the present invention;

[0030] Figure 4 is Figure 3 an enlarged schematic diagram of the structure at A;

[0031] Figure 5 is Figure 3 an enlarged schematic diagram of the structure at B;

[0032] Figure 6 is Figure 3 an enlarged schematic diagram of the structure at C;

[0033] Figure 7 is a partial three-dimensional structural schematic diagram of the present invention;

[0034] Figure 8 is a three-dimensional structural schematic diagram of the third adjusting shaft of the present invention;

[0035] Figure 9 is a three-dimensional structural schematic diagram of the connecting block of the present invention.

[0036] In the figure: 1, precast cushion plate; 2, sealed connecting plate; 3, first connecting groove; 4, connecting limit block; 5, second connecting groove; 6, connecting block; 7, adjusting rotating groove; 8, adjusting turntable; 9, connecting rotating groove; 10, connecting rotating shaft; 11, connecting shifting block; 12, shifting finger groove; 13, shifting limit groove; 14, sealed insertion plate; 15, sealed insertion slot; 16, first adjusting cylinder; 17, first adjusting shaft; 18, first rotating groove; 19, first rotating block; 20, fixing bracket; 21, second adjusting shaft; 22, first bevel gear; 23, second bevel gear; 24, ball; 25, third adjusting shaft; 26, second adjusting cylinder; 27, second rotating groove; 28, second rotating block; 29, limit spring; 30, holding groove; 31, connecting limit groove; 32, fixing groove; 33, connecting spring; 34, rotating shaft spring; 35, rotating shaft shifting rod. Specific implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1:

[0039] Please refer to Figures 1 to 9 , the present invention provides a technical solution: a precast cushion layer for the bottom plate of a silt geological formation, including: a precast cushion plate 1, which is divided into upper and lower layers and is hollow; a sealed connecting plate 2, which is arranged on the outer side between the upper and lower precast cushion plates 1 and is connected to the lower precast cushion plate 1; an adjusting rotating groove 7, which is opened at the top end of the upper precast cushion plate 1; a second adjusting cylinder 26, which is arranged at the top end of the lower precast cushion plate 1 and is located between the upper and lower precast cushion plates 1; a third adjusting shaft 25, one end of which is threadedly connected to the second adjusting cylinder 26, and the other end passes through the upper precast cushion plate 1, and an adjusting turntable 8 is arranged at the corresponding position of the third adjusting shaft 25 with respect to the adjusting rotating groove 7; a sealed insertion slot 15, which is opened at the top end of the sealed connecting plate 2; a sealed insertion plate 14, which is slidably arranged in the sealed insertion slot 15 and the top end is connected to the upper precast cushion plate 1; a second rotating groove 27, which is opened in the upper precast cushion plate 1; a second rotating block 28, which is arranged at the corresponding position of the third adjusting shaft 25 with respect to the second rotating groove 27; and a plurality of balls 24, which are circumferentially arranged at the bottom end of the adjusting turntable 8.

[0040] Through the prefabricated cushion plate 1 with a hollow structure, the weight of the prefabricated cushion plate 1 is effectively reduced, which is convenient for transportation and conveying. The side of the prefabricated cushion plate 1 is sealed by the sealing connecting plate 2. By turning the adjusting turntable 8, the third adjusting shaft 25 rotates. The rotation of the third adjusting shaft 25 is limited by the cooperation of the second rotating groove 27 and the second rotating block 28. A plurality of groups of rolling balls 24 arranged circumferentially reduce the friction force when the adjusting turntable 8 rotates, which is convenient for the adjusting turntable 8 to rotate in the adjusting rotating groove 7, so that the third adjusting shaft 25 and the second adjusting cylinder 26 cooperate to drive the upper prefabricated cushion plate 1 to move up and down, thereby adjusting the height of the prefabricated cushion plate 1. Moreover, the third adjusting shaft 25 and the second adjusting cylinder 26 cooperate to support the upper and lower layers of prefabricated cushion plates 1, which can ensure height compensation when the prefabricated cushion plate sinks during laying, and is convenient for ensuring the flatness of the overall cushion layer.

[0041] Embodiment 2:

[0042] As Figures 3-4 As shown in FIGS. 6 and 7, the prefabricated cushion layer for the silt geological floor disclosed in Embodiment 2 of the present invention has basically the same structure as that in Embodiment 1. The difference lies in strengthening the support strength of the upper prefabricated cushion plate 1. A plurality of first adjusting cylinders 16 are provided at the top end of the lower prefabricated cushion plate 1, and the first adjusting cylinders 16 are circumferentially distributed outside the second adjusting cylinder 26. A first adjusting shaft 17 is arranged in the first adjusting cylinder 16. The first adjusting shaft 17 is threadedly connected to the first adjusting cylinder 16, and the thread rotation directions of the first adjusting cylinder 16 and the first adjusting shaft 17 are opposite to the thread rotation directions of the third adjusting shaft 25 and the second adjusting cylinder 26. A transmission member is arranged between the first adjusting shaft 17 and the third adjusting shaft 25, and the third adjusting shaft 25 drives the first adjusting shaft 17 to rotate relative to the third adjusting shaft 25 through the transmission member.

[0043] A first rotating groove 18 is formed in the upper prefabricated cushion plate 1. A first rotating block 19 is arranged at the position corresponding to the first rotating groove 18 of the first adjusting shaft 17. The first rotating block 19 is arranged in the first rotating groove 18, and the longitudinal cross-sections of the first rotating groove 18 and the first rotating block 19 are in a "T" - shaped structure.

[0044] The transmission member includes a second bevel gear 23. The second bevel gear 23 is arranged at the upper ends of the third adjusting shaft 25 and the first adjusting shaft 17. A fixing frame 20 is arranged between the third adjusting shaft 25 and the first adjusting shaft 17. The top end of the fixing frame 20 is connected to the upper prefabricated cushion plate 1. A second adjusting shaft 21 is rotatably arranged at the lower end of the fixing frame 20. First bevel gears 22 are connected to both ends of the second adjusting shaft 21, and the first bevel gears 22 at both ends of the second adjusting shaft 21 are respectively meshed with the corresponding second bevel gears 23.

[0045] The interior of the precast cushion plate 1 is supported by multiple sets of first adjusting cylinders 16 and first adjusting shafts 17 provided. When adjusting the height of the precast cushion plate 1, by rotating the adjusting turntable 8 to drive the third adjusting shaft 25 to rotate, the second bevel gear 23 sleeved on the upper end of the third adjusting shaft 25 rotates. The second bevel gear 23 transmits the rotation to the first bevel gear 22 at the other end of the second adjusting shaft 21 through cooperation with the first bevel gear 22 at one end of the second adjusting shaft 21, so that the first bevel gear 22 at the other end of the first bevel gear 22 cooperates with the second bevel gear 23 at the upper end of the first adjusting shaft 17 to drive the first adjusting shaft 17 to rotate. At this time, the rotation direction of the first adjusting shaft 17 is opposite to that of the third adjusting shaft 25, and the thread rotation directions of the first adjusting cylinder 16 and the first adjusting shaft 17 are opposite to those of the third adjusting shaft 25 and the second adjusting cylinder 26, so that the first adjusting shaft 17 and the third adjusting shaft 25 drive the upper precast cushion plate 1 to be adjusted in the same direction, thereby increasing the support strength of the upper precast cushion plate 1.

[0046] Embodiment 3:

[0047] As Figure 2 、 5 、6, and 9 show, the precast cushion layer for a silt geological floor disclosed in Embodiment 3 of the present invention has basically the same structure as that in Embodiment 2, and the difference lies in the splicing of the precast cushion plate 1. At least one set of connection grooves is provided on the outer side of the sealing connection plate 2. The connection grooves include a first connection groove 3 and a second connection groove 5. The first connection groove 3 and the second connection groove 5 are respectively arranged on both sides of the sealing connection plate 2. There are multiple second connection grooves 5, and a connection block 6 is slidably arranged in the second connection groove 5. A pushing assembly is arranged on the precast cushion plate 1 for pushing one end of the connection block 6 out of the second connection groove 5.

[0048] A fixing groove 32 is provided near the inner side of the second connection groove 5 of the connection block 6, and a first elastic member is arranged in the fixing groove 32. The first elastic member includes a connection spring 33. One end of the connection spring 33 is connected to the second connection groove 5, and the other end is connected to the fixing groove 32, and the fixing groove 32 is always in a stretched state. Connection limit grooves 31 are provided at the upper and lower ends of the connection block 6. A holding groove 30 is provided at the position of the first connection groove 3 corresponding to the connection limit grooves 31, and a connection limit block 4 is slidably arranged in the holding groove 30. A second elastic member is arranged between the connection limit block 4 and the holding groove 30. The second elastic member includes a limit spring 29. One end of the limit spring 29 is connected to the holding groove 30, and the other end is connected to the connection limit block 4. An inclined surface is provided on the outer side of the connection limit block 4.

[0049] The pushing assembly includes a connecting shaft 10, which is arranged between the second connecting groove 5 and the connecting block 6. A third elastic member is arranged between the bottom end of the connecting shaft 10 and the second connecting groove 5. The third elastic member includes a shaft spring 34. One end of the shaft spring 34 is connected to the second connecting groove 5, and the other end is connected to the connecting shaft 10. The shaft spring 34 is always in a stretched state. The top end of the connecting shaft 10 passes through the upper prefabricated pad 1. The upper prefabricated pad 1 is at the position corresponding to the connecting shaft 10. A connecting groove 9 is provided, a connecting shift block 11 is provided in the connecting groove 9, the connecting shift block 11 is provided at the top of the connecting shaft 10, and a shift finger groove 12 is provided on one side of the connecting shaft 10, a shaft shift lever 35 is provided near the bottom of the connecting shaft 10, the shaft shift lever 35 is located between the connecting block 6 and the second connecting groove 5, and the length of the shaft shift lever 35 is equal to the depth of the second connecting groove 5, a shift limit groove 13 is provided at one end of the connecting groove 9, and the shift limit groove 13 and the connecting shift block 11 form an angle of ninety degrees.

[0050] By placing a plurality of prefabricated pads 1 at the position to be laid, after the placement is completed, the connecting block 11 is rotated inside the connecting groove 9 by toggling the finger groove 12, so that the connecting block 11 drives the connecting shaft 10 to rotate, and at this time, the connecting shaft 10 drives the shaft lever 35 to rotate toward the connecting block 6, and the shaft lever 35 supports the connecting block 6 to extend out of the second connecting groove 5 until the connecting block 11 rotates 90 degrees, and the shaft spring 34 stretches the connecting shaft 10 to move downward, so that the connecting block 11 enters the limit groove 13, thereby limiting the connecting shaft 10 and the shaft lever 35, and the connecting block 6 extends out of the second connecting groove 5 and enters the first connecting groove 3, and when the connecting block 6 contacts the inclined surface on the outside of the connecting limit block 4, the connecting limit block 4 is pressed into the supporting groove 30, until the connecting limit groove 31 is aligned with the fixing groove 32, the limiting spring 29 supports the connecting limit block 4 and enters the connecting limit groove 31, thereby limiting the connecting block 6, thereby connecting the two sets of prefabricated pads 1.

[0051] The specific plan is:

[0052] The prefabricated pad 1 is provided with a hollow structure, and its weight is effectively reduced, so that it is convenient for transportation and delivery. By placing a plurality of prefabricated pads 1 at the position to be laid, after the placement is completed, the height of the position of the uneven prefabricated pad 1 is adjusted, and the third adjusting shaft 25 is driven to rotate by rotating the adjusting dial 8, and the third adjusting shaft 25 is limited in rotation by the cooperation of the second rotating groove 27 and the second rotating block 28. The plurality of groups of balls 24 provided circumferentially reduce the friction force of the adjusting dial 8 during rotation, so that the adjusting dial 8 can rotate in the adjusting rotating groove 7. The second bevel gear 23 sleeved on the upper end of the third adjusting shaft 25 rotates, and the second bevel gear 23 transmits the rotation to the second adjusting shaft 21 at another end by cooperating with the first bevel gear 22 at one end of the second adjusting shaft 21. The first bevel gear 22 at one end makes the first bevel gear 22 at the other end of the first bevel gear 22 cooperate with the second bevel gear 23 at the upper end of the first adjusting shaft 17 to drive the first adjusting shaft 17 to rotate. At this time, the rotation direction of the first adjusting shaft 17 is opposite to the rotation direction of the third adjusting shaft 25, and the thread rotation direction of the first adjusting cylinder 16 and the first adjusting shaft 17 is opposite to the thread rotation direction of the third adjusting shaft 25 and the second adjusting cylinder 26, so that the first adjusting shaft 17 and the third adjusting shaft 25 drive the upper prefabricated pad 1 to adjust in the same direction up and down, thereby increasing the supporting strength of the upper prefabricated pad 1, and by adjusting the height of the prefabricated pad 1, height compensation is ensured when the prefabricated pad sinks during laying, so as to ensure the flatness of the pad.

[0053] The connecting block 11 is rotated in the connecting groove 9 by toggling the finger groove 12, so that the connecting block 11 drives the connecting shaft 10 to rotate. At this time, the connecting shaft 10 drives the shaft lever 35 to rotate toward the connecting block 6, and the shaft lever 35 supports the connecting block 6 to extend out of the second connecting groove 5 until the connecting block 11 rotates ninety degrees. Then, the shaft spring 34 stretches the connecting shaft 10 to move downward, so that the connecting block 11 enters the toggling limit groove 13, thereby limiting the connecting shaft 10 and the shaft lever 35, and the connecting block 6 extends out of the second connecting groove 5 into the first connecting groove 3, and When the connecting block 6 contacts the inclined surface on the outside of the connecting limit block 4, the connecting limit block 4 is pressed into the supporting groove 30 until the connecting limit groove 31 is aligned with the fixing groove 32. The limiting spring 29 supports the connecting limit block 4 and enters the connecting limit groove 31, thereby limiting the connecting block 6, thereby connecting the two groups of prefabricated pads 1. By directly laying and then connecting multiple groups of prefabricated pads 1, the connection before laying is eliminated. Not only can the prefabricated pads 1 at uneven locations be adjusted in time, but the two groups of prefabricated pads 1 can be connected by toggling, which speeds up the laying speed and ensures the flatness of the pad layer.

[0054] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast cushion layer for a silt geological floor slab, characterized in that, include: The prefabricated pad (1) is divided into two layers, upper and lower, and is hollow; A sealing connecting plate (2) is arranged outside the upper and lower prefabricated pads (1) and is connected to the prefabricated pad (1) of the lower layer; An adjusting groove (7) is provided on the top of the prefabricated pad (1) on the upper layer; A second adjustment cylinder (26) is arranged on the top of the prefabricated pad (1) of the lower layer and is located between the upper and lower prefabricated pads (1); A third adjustment shaft (25), one end of which is threadedly connected to the second adjustment cylinder (26), and the other end of which is arranged through the upper prefabricated pad (1), and an adjustment dial (8) is arranged at a position of the third adjustment shaft (25) corresponding to the adjustment groove (7); A sealing slot (15) is provided at the top of the sealing connecting plate (2); A sealing plug plate (14) is slidably disposed in the sealing slot (15), and the top end of the sealing plug plate is connected to the prefabricated pad (1) on the upper layer; A second rotation groove (27) is provided in the prefabricated pad (1) of the upper layer; A second rotating block (28) is arranged at a position of the third adjusting shaft (25) corresponding to the second rotating groove (27); At least one group of connecting grooves is formed on the outer side of the sealing connecting plate (2), and the connecting grooves include a first connecting groove (3) and a second connecting groove (5). The first connecting groove (3) and the second connecting groove (5) are respectively arranged on both sides of the sealing connecting plate (2). A plurality of second connecting grooves (5) are arranged. A connecting block (6) is slidably arranged in the second connecting groove (5). A pushing assembly is arranged on the prefabricated pad (1) for pushing one end of the connecting block (6) out of the second connecting groove (5). The connecting block (6) is provided with a fixing groove (32) on the inner side close to the second connecting groove (5), and a first elastic member is arranged in the fixing groove (32); The upper and lower ends of the connecting block (6) are provided with connecting limit grooves (31); a supporting groove (30) is provided at a position of the first connecting groove (3) corresponding to the connecting limit groove (31); a connecting limit block (4) is slidably arranged in the supporting groove (30); a second elastic member is arranged between the connecting limit block (4) and the supporting groove (30); and an inclined surface is provided on the outer side of the connecting limit block (4); The pushing assembly comprises a connecting shaft (10), the connecting shaft (10) being arranged between the second connecting groove (5) and the connecting block (6), a third elastic member being arranged between the bottom end of the connecting shaft (10) and the second connecting groove (5), the top end of the connecting shaft (10) passing through the upper prefabricated pad (1), the upper prefabricated pad (1) being provided with a connecting groove (9) at a position corresponding to the connecting shaft (10), a connecting shifting block (11) being arranged in the connecting groove (9), the connecting shifting block (11) being arranged at the top end of the connecting shaft (10), and a shifting finger groove (12) being provided on one side of the connecting shaft (10), a shaft shifting rod (35) being arranged near the bottom end of the connecting shaft (10), the shaft shifting rod (35) being located between the connecting block (6) and the second connecting groove (5), and the length of the shaft shifting rod (35) being equal to the depth of the second connecting groove (5); A shifting limit groove (13) is provided at one end of the connecting rotating groove (9), and the included angle between the shifting limit groove (13) and the connecting shifting block (11) is 90 degrees.

2. The precast cushion layer for the bottom slab in silt geological conditions according to claim 1, characterized in that: At the top of the prefabricated cushion plate (1) of the lower layer, there are multiple first adjusting cylinders (16) which are circumferentially distributed outside the second adjusting cylinder (26). A first adjusting shaft (17) is arranged inside the first adjusting cylinder (16). The first adjusting shaft (17) is threadedly connected to the first adjusting cylinder (16), and the thread directions of the first adjusting cylinder (16) and the first adjusting shaft (17) are opposite to the thread directions of the third adjusting shaft (25) and the second adjusting cylinder (26). A transmission component is arranged between the first adjusting shaft (17) and the third adjusting shaft (25), and the third adjusting shaft (25) drives the first adjusting shaft (17) to rotate relative to the third adjusting shaft (25) through the transmission component.

3. The precast cushion layer for the bottom slab in silt geological formation according to claim 2, wherein: A first rotating groove (18) is formed in the prefabricated cushion plate (1) of the upper layer. At the position corresponding to the first rotating groove (18) of the first adjusting shaft (17), there is a first rotating block (19). The first rotating block (19) is arranged in the first rotating groove (18), and the longitudinal cross-sections of the first rotating groove (18) and the first rotating block (19) are in a "T" - shaped structure.

4. The precast cushion layer for the silt geological floor slab according to claim 2, wherein: The transmission component includes a second bevel gear (23). The second bevel gear (23) is arranged at the upper ends of the third adjusting shaft (25) and the first adjusting shaft (17). A fixing frame (20) is arranged between the third adjusting shaft (25) and the first adjusting shaft (17). The top of the fixing frame (20) is connected to the prefabricated cushion plate (1) of the upper layer. A second adjusting shaft (21) is rotatably arranged at the lower end of the fixing frame (20). First bevel gears (22) are connected to both ends of the second adjusting shaft (21), and the first bevel gears (22) at both ends of the second adjusting shaft (21) are respectively meshed with the corresponding second bevel gears (23).

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