A waterproofing device for deep foundation pits in rail transit construction

Abstract

This invention relates to the field of building equipment technology and discloses a waterproofing device for deep foundation pits in rail transit construction. The device includes: a protective mechanism, an upper jacking mechanism mounted on the upper side of the protective mechanism, a humidifying mechanism at the lower end of the upper jacking mechanism, an adjusting mechanism mounted on the left side of the protective mechanism, and a water inlet pipe mounted on the left side of the adjusting mechanism. This invention delivers clean water to multiple protective mechanisms via the water inlet pipe, replenishing water to the pile heads inside the protective mechanisms, thus freeing up manual operation and enabling quick and convenient water replenishment of the pile heads. The humidifying unit provides continuous water supply to the pile heads for maintenance, allowing the water flow to act on the pile heads and providing time for water penetration and dissipation, preventing excessive water output in a short time that could flow around the pile heads before penetration and dissipation, thus failing to achieve the desired maintenance effect.

Description

Technical Field

[0001] This invention relates to the field of building equipment technology, specifically to a waterproofing device for deep foundation pits in rail transit construction. Background Technology

[0002] Transportation is indispensable in the process of urbanization. As an important carrier of transportation, the construction of rail transit is crucial, and its quality directly affects the normal operation of transportation. In the process of rail transit construction, bored pile construction technology can save construction time and improve construction quality, and therefore has received much attention in the entire rail transit industry.

[0003] Waterproofing deep foundation pits for rail transit construction refers to waterproofing the pile heads of cast-in-place piles. The waterproofing process generally consists of three stages. The first stage involves cleaning debris and dust from the top layer of the pile head and wetting it with water. The second stage involves applying two coats of cement-based crystalline waterproof coating to the pile head, sides, and surrounding area. The third stage is the subsequent curing work. Under normal circumstances, the surface of the cement-based penetrating crystalline waterproof coating needs to be sprayed with clean water three to five times a day for 3 to 5 days. In summer, water needs to be sprayed every two hours. After spraying, external environmental factors such as strong winds, direct sunlight, and rain should be avoided. Spraying water during curing replenishes the cement-based penetrating crystalline waterproof coating with moisture, increases its hardness, and ensures that it does not suffer from low strength or powdering due to lack of moisture.

[0004] Spraying of pile heads is usually done manually. However, due to the frequent spraying of water on pile heads throughout the day and the large number of pile heads, the labor intensity of manual water spraying is too high. At the same time, the moisture on the pile heads is lost quickly in the external environment after spraying. If the moisture is not replenished in time and the pile heads are exposed to the sun for a long time, the waterproof layer on the pile heads is prone to cracking.

[0005] In addition, after the water spraying is completed, the water in the pile head is lost quickly due to air flow. The water in the outer layer evaporates completely or is greatly reduced before it can penetrate the inner layer of the waterproof layer, resulting in uneven water replenishment of the waterproof layer and easy cracking inside. Summary of the Invention

[0006] In view of the above problems, embodiments of the present invention provide a waterproofing device for deep foundation pits in rail transit construction, to solve the technical problems in related technologies where manual spraying of water is inconvenient due to frequent spraying, and where rapid water flow in the external environment prevents timely replenishment of the waterproofing layer at the pile head, resulting in poor waterproofing effect. To achieve the above objectives, embodiments of the present invention provide the following technical solution.

[0007] This invention provides a waterproofing device for deep foundation pits in rail transit construction, comprising: a protective mechanism, an upper jacking mechanism installed on the upper side of the protective mechanism, a wetting mechanism provided at the lower end of the upper jacking mechanism, an adjusting mechanism installed on the left side of the protective mechanism, and a water inlet pipe installed on the left side of the adjusting mechanism.

[0008] According to an advantageous embodiment, the protective mechanism includes a first arc-shaped cover, a rotating shaft fixedly connected to the rear end of the first arc-shaped cover, a second arc-shaped cover rotatably connected to the right side of the rotating shaft, a latch fixedly connected to the front end of the second arc-shaped cover, and rubber skirts fixedly connected to the lower ends of the first arc-shaped cover and the second arc-shaped cover.

[0009] According to an advantageous embodiment, the upper lifting mechanism includes a top cover, the lower end of which is fixedly connected to the upper end of a first arc-shaped cover, an internal threaded block is fixedly connected to the middle of the upper side of the top cover, a threaded post is threadedly connected to the middle of the internal threaded block, a turntable is fixedly connected to the upper end of the threaded post, a limit plate is fixedly connected to the lower end of the threaded post, and two sets of front-to-back symmetrical guide plates are fixedly connected to the lower end of the top cover, with two guide plates in each set.

[0010] According to an advantageous embodiment, the humidification mechanism includes a storage cylinder, on the inner wall of which a first filter plate and a second filter plate are fixedly connected from top to bottom. Both the first and second filter plates have multiple small holes. A humidification unit is provided at the lower end of the storage cylinder, and a mounting groove is provided at the upper end of the storage cylinder. The lower end of the limiting plate is rotatably connected to the inside of the limiting plate. A limiting block fixedly connected to the outer wall of the storage cylinder is provided between the two guide plates in each group. A connecting hose is fixedly connected to the left side of the storage cylinder, and the connecting hose communicates with the adjustment mechanism.

[0011] According to an advantageous embodiment, the humidification unit includes a fixing block, the upper end of which is fixedly connected to the lower end of the storage cylinder, and a sponge pad fixedly connected to the lower end of the fixing block. The sponge pad is made of multiple layers of cotton cloth. A central water passage groove and an edge water passage groove are formed inside the fixing block. The upper diameter of the central water passage groove is smaller than the upper diameter of the edge water passage groove. The edge water passage groove is located outside the central water passage groove. The lower sides of both the central water passage groove and the edge water passage groove are flush with the lower side of the fixing block.

[0012] According to an advantageous embodiment, the regulating mechanism includes a water tank, a diversion block is fixedly connected to the left side inside the water tank, a matching groove is provided in the middle of the diversion block, a blocking unit is provided on the right side of the matching groove, and a water delivery pipe connected to a connecting hose is fixedly connected to the upper end of the water tank.

[0013] According to an advantageous embodiment, the blocking unit includes a frustum block that fits into the right side of a fitting groove. A rubber layer is provided on the left side of the frustum block, and a symmetrical positioning groove is provided on the right side of the frustum block. A limiting rod is slidably connected in the positioning groove. A receiving groove is provided in the middle of the right side of the frustum block, and a support rod is slidably connected in the receiving groove. A compression spring is fixedly connected between the left end of the support rod and the inner wall of the receiving groove. The right ends of the limiting rod and the support rod are both fixedly connected to the inner wall of the water tank.

[0014] Compared with existing technologies, the above-mentioned waterproofing device for deep foundation pits in rail transit construction has the following advantages:

[0015] 1. Clean water is supplied to multiple protective mechanisms through the water inlet pipe, and water is replenished to the pile head inside the protective mechanism, thereby freeing up manual operation and making it quick and convenient to replenish water to the pile head.

[0016] 2. The humidification unit provides continuous water supply to the pile head for maintenance, allowing the water to act on the pile head and giving the water time to penetrate and disperse. This avoids excessive water output in a short period of time, which would cause the water to flow around the pile head before it has a chance to penetrate and disperse, thus failing to achieve the desired maintenance effect.

[0017] 3. The protective mechanism and the top-mounting mechanism cover the pile head to prevent it from being exposed and to isolate it from the influence of the external environment. At the same time, the protective mechanism and the top-mounting mechanism work together to reduce the rate of water loss from the pile head and extend the moisturizing time, thereby improving the waterproof effect of the pile head.

[0018] 4. The humidification mechanism comes into contact with the pile head, and the clean water inside the humidification mechanism slowly flows downward to the surface of the pile head, prolonging the moisturizing time. At the same time, compared with directly spraying clean water, it can effectively save water resources and reduce waste.

[0019] 5. By using an adjustment mechanism to block the water flow in the inlet pipe, the time taken for each adjustment mechanism to deliver water to the humidifying mechanism is roughly the same. This shortens the overall water delivery time and reduces water waste. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2This is a partial cross-sectional view of the protective mechanism of the present invention.

[0023] Figure 3 This is a top view of the protective mechanism of the present invention.

[0024] Figure 4 This is a schematic diagram of the upper lifting mechanism and the adjusting mechanism in this invention.

[0025] Figure 5 This is a schematic diagram of the humidification unit of the present invention.

[0026] Figure 6 This is a full sectional view of the adjustment mechanism of the present invention.

[0027] Figure label:

[0028] 1. Protective mechanism; 2. Top mechanism; 3. Wetting mechanism; 4. Adjustment mechanism; 5. Water inlet connecting pipe.

[0029] 11. First arc-shaped cover; 12. Rotating shaft; 13. Second arc-shaped cover; 14. Locking buckle; 15. Rubber skirt ring.

[0030] 21. Top cover; 22. Internal threaded block; 23. Threaded column; 24. Turntable; 25. Limiting plate; 26. Guide plate.

[0031] 31. Storage cylinder; 32. First filter plate; 33. Second filter plate; 34. Humidification unit; 35. Installation slot; 36. Limiting block; 37. Connecting hose.

[0032] 341. Fixing block; 342. Sponge pad; 343. Center water channel; 344. Edge water channel.

[0033] 41. Water tank; 42. Drain block; 43. Fitting groove; 44. Blocking unit; 45. Water supply pipe.

[0034] 441. Frustum block; 442. Positioning groove; 443. Limiting rod; 444. Receiving groove; 445. Support rod; 446. Compression spring. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] like Figure 1 and Figure 2As shown, a waterproofing device for deep foundation pits in rail transit construction includes a protective mechanism 1, an upper jacking mechanism 2 installed on the upper side of the protective mechanism 1, a wetting mechanism 3 installed at the lower end of the upper jacking mechanism 2, an adjusting mechanism 4 installed on the left side of the protective mechanism 1, and a water inlet pipe 5 installed on the left side of the adjusting mechanism 4.

[0037] Waterproofing deep foundation pits for rail transit construction refers to waterproofing the pile heads of cast-in-place piles. The waterproofing process generally consists of three stages. The first stage involves cleaning debris and dust from the top layer of the pile head and wetting it with water. The second stage involves applying two coats of cement-based crystalline waterproof coating to the pile head, its sides, and the surrounding area. The third stage is the subsequent maintenance work, which involves: first, opening the protective mechanism 1 and then placing it on the pile head so that the pile head is inside the protective mechanism 1. Since there is exposed steel reinforcement on the outer ring of the pile head, but not on the core, the overall length of the wetting mechanism 3 is adjusted so that the lower side of the wetting mechanism 3 fits snugly against the middle of the top of the pile head. Then, water is periodically supplied to the inlet pipe 5. The inlet pipe 5 then supplies water through the regulating mechanism 4 into the wetting mechanism 3, where it moisturizes the pile head. Once a certain amount of water is reached, the regulating mechanism 4 automatically shuts off, limiting the supply of water through the inlet pipe 5.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, the protective mechanism 1 includes a first arc-shaped cover 11, a rotating shaft 12 fixedly connected to the rear end of the first arc-shaped cover 11, a second arc-shaped cover 13 rotatably connected to the right side of the rotating shaft 12, a latch 14 fixedly connected to the front end of the second arc-shaped cover 13, and a rubber skirt ring 15 fixedly connected to the lower ends of the first arc-shaped cover 11 and the second arc-shaped cover 13.

[0039] After applying cement-based crystalline waterproof coating to the pile head, the second arc-shaped cover 13 is rotated backward around the pivot 12, and then the first arc-shaped cover 11 is placed around the pile head. The second arc-shaped cover 13 is then rotated to its initial position. The second arc-shaped cover 13 is engaged with the first arc-shaped cover 11 by the latch 14. The rubber skirt 15 seals the lower ends of the second arc-shaped cover 13 and the first arc-shaped cover 11. Under the combined action of the first arc-shaped cover 11, the second arc-shaped cover 13, the latch 14, the upper top mechanism 2, and the rubber skirt 15, a certain external sealing is achieved for the pile head, reducing moisture loss and prolonging the moisturizing time when keeping the pile head moist.

[0040] like Figure 1 , Figure 2 and Figure 4As shown, the upper lifting mechanism 2 includes a top cover 21. The lower end of the top cover 21 is fixedly connected to the upper end of the first arc-shaped cover 11. An internal thread block 22 is fixedly connected to the middle of the upper side of the top cover 21. A threaded post 23 is threadedly connected to the middle of the internal thread block 22. A turntable 24 is fixedly connected to the upper end of the threaded post 23. A limit plate 25 is fixedly connected to the lower end of the threaded post 23. Two sets of front and rear symmetrical guide plates 26 are fixedly connected to the lower end of the top cover 21. There are two guide plates 26 in each set.

[0041] After the protective mechanism 1 is installed, the turntable 24 is rotated according to the distance between the bottom of the wetting mechanism 3 and the pile head. The turntable 24 drives the threaded column 23 to rotate. The threaded column 23 moves downward at the same time and drives the limiting plate 25 to move together. Under the limiting action of the guide plate 26, the wetting mechanism 3 gradually moves downward, and finally the bottom of the wetting mechanism 3 is in contact with the top of the pile head.

[0042] like Figure 2 and Figure 4 As shown, the humidification mechanism 3 includes a storage cylinder 31. A first filter plate 32 and a second filter plate 33 are fixedly connected to the inner wall of the storage cylinder 31 from top to bottom. Both the first filter plate 32 and the second filter plate 33 have multiple small holes. A humidification unit 34 is provided at the lower end of the storage cylinder 31. A placement groove 35 is provided at the upper end of the storage cylinder 31. A limiting plate 25 is rotatably connected to the inside of the limiting plate 25. A limiting block 36 fixedly connected to the outer wall of the storage cylinder 31 is provided between the two guide plates 26 in each group. A connecting hose 37 is fixedly connected to the left side of the storage cylinder 31. The connecting hose 37 is connected to the adjustment mechanism 4.

[0043] Water flows into the connecting hose 37 through the regulating mechanism 4. The connecting hose 37 delivers the water into the storage cylinder 31. Under the action of gravity, the water flows through the first filter plate 32 and the second filter plate 33 towards the humidification unit 34. When the water flows through the first filter plate 32 and the second filter plate 33, it is blocked. Under the action of surface tension, the water does not flow into the humidification unit 34 all at once. The water stays in the upper cavity of the first filter plate 32 and between the first filter plate 32 and the second filter plate 33 for a certain period of time. The water slowly flows into the humidification unit 34, thereby continuously supplying water to the pile head for maintenance. This allows the water to act on the pile head and gives the water time to penetrate and disperse, avoiding excessive water output in a short time, which would cause the water to flow around the pile head before it has time to penetrate and disperse, thus failing to achieve the ideal maintenance effect.

[0044] like Figure 2 and Figure 5As shown, the humidification unit 34 includes a fixing block 341. The upper end of the fixing block 341 is fixedly connected to the lower end of the storage cylinder 31. A sponge pad 342 is fixedly connected to the lower end of the fixing block 341. The sponge pad 342 is made of multiple layers of cotton cloth. A central water passage groove 343 is opened inside the fixing block 341. An edge water passage groove 344 is opened inside the fixing block 341. The upper diameter of the central water passage groove 343 is smaller than the upper diameter of the edge water passage groove 344. The edge water passage groove 344 is located outside the central water passage groove 343. The lower sides of both the central water passage groove 343 and the edge water passage groove 344 are flush with the lower side of the fixing block 341.

[0045] When water flows through the upper end of the fixed block 341, part of the water flows through the central water channel 343 and contacts the middle of the sponge pad 342, while another part flows through the edge water channel 344 and contacts the edge of the sponge pad 342. Because the upper diameter of the central water channel 343 is smaller than the upper diameter of the edge water channel 344, most of the water flows through the edge water channel 344 to the edge of the sponge pad 342, while the rest flows through the central water channel 343 to the middle of the sponge pad 342. The amount of water wetting at the edge of the sponge pad 342 is relatively greater than that at the center of the sponge pad 342, ensuring that water can flow to the edge of the pile head, so that the outer edge of the pile head where the reinforcing steel is located can also be effectively wetted, thereby achieving the purpose of uniform humidification of the pile head and rapid humidification of the pile head surface. Because the sponge pad 342 has good water absorption and water-locking and water-storing functions, it can restrict the flow of water, thereby further prolonging the rate of water loss and increasing the time of pile head humidification.

[0046] like Figure 1 and Figure 6 As shown, the regulating mechanism 4 includes a water tank 41, a diversion block 42 is fixedly connected to the left side of the water tank 41, a matching groove 43 is opened in the middle of the diversion block 42, a blocking unit 44 is provided on the right side of the matching groove 43, and a water delivery pipe 45 connected to the connecting hose 37 is fixedly connected to the upper end of the water tank 41; a small water pump is installed inside the water tank 41.

[0047] like Figure 1 and Figure 6 As shown, the blocking unit 44 includes a frustum block 441, which fits into the right side of the fitting groove 43. A rubber layer is provided on the left side of the frustum block 441. A symmetrical positioning groove 442 is provided on the right side of the frustum block 441. A limit rod 443 is slidably connected in the positioning groove 442. A receiving groove 444 is provided in the middle of the right side of the frustum block 441. A support rod 445 is slidably connected in the receiving groove 444. A compression spring 446 is fixedly connected between the left end of the support rod 445 and the inner wall of the receiving groove 444. The right ends of the limit rod 443 and the support rod 445 are both fixedly connected to the inner wall of the water tank 41.

[0048] In the initial stage when the external faucet is turned on, the water flow will be diverted into each inlet pipe 5. Before the water flow fills the inside of the inlet pipe 5, the thrust generated by the water flow on the frustum block 441 is less than the elastic force of the compression spring 446, which is insufficient to separate the frustum block 441 from the inner wall of the mating groove 43. When the water flow fills the inside of the inlet pipe 5 and continues to flow, the thrust generated by the water flow on the frustum block 441 is sufficient to push the frustum block 441 from the inner wall of the mating groove 43. The frustum block 441 is then moved to the right along the limit rod 443, while the compression spring is also affected. The spring 446 generates pressure, compressing the spring 446 and storing energy. At this time, the water flows into the water tank 41, and then the water pump in the water tank 41 transmits the water to the water delivery pipe 45, and finally enters the humidification mechanism 3 to complete the water supply. This ensures that each regulating mechanism 4 supplies approximately the same amount of water to the humidification mechanism 3, avoiding the situation where the regulating mechanism 4 at the head supplies too much water to the humidification mechanism 3, resulting in water waste, while the regulating mechanism 4 at the tail supplies too little water to the humidification mechanism 3, resulting in insufficient moisture retention at the pile head.

[0049] The working principle of this invention is as follows: Step 1: Waterproofing the deep foundation pit for rail transit construction refers to waterproofing the pile head. The waterproofing process is generally divided into three stages. The first stage is to clean the top layer of the pile head of debris and dust and moisten it with water. The second stage is to apply two coats of cement-based crystalline waterproof coating to the pile head, the sides of the pile head, and the surrounding area of ​​the pile head. The third stage is the subsequent maintenance work.

[0050] Step 2: Open the protective mechanism 1, and then place the protective mechanism 1 around the pile head so that the pile head is inside the protective mechanism 1.

[0051] Step 3: Since there are exposed steel bars on the outer ring of the pile head, but not on the core of the pile, the overall length of the wetting mechanism 3 is adjusted so that the lower side of the wetting mechanism 3 fits against the upper side of the column head.

[0052] Step 4: Make the lower side of the humidification mechanism 3 fit in the middle of the top of the pile head, and then periodically deliver water to the inlet pipe 5. The inlet pipe 5 will allow the water to flow through the regulating mechanism 4 into the humidification mechanism 3, and then the humidification mechanism 3 will moisturize the pile head. After a certain amount of water is reached, the regulating mechanism 4 will automatically stop, limiting the delivery of water through the inlet pipe 5.

[0053] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "vertical, horizontal", "top, bottom", and "end, side" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A spray curing device for the pile head of cast-in-place piles used in deep foundation pit construction for rail transit engineering, characterized in that, include: Protective structure (1); The top-mounted mechanism (2) is located on the upper side of the protective mechanism (1); The humidification mechanism (3) is located inside the protective mechanism (1). The humidification mechanism (3) includes a storage cylinder (31). The inner wall of the storage cylinder (31) is fixedly connected with a first filter plate (32) and a second filter plate (33) from top to bottom. The first filter plate (32) and the second filter plate (33) are provided with multiple small holes. The lower end of the storage cylinder (31) is provided with a humidification unit (34). The first filter plate (32) and the second filter plate (33) work together to reduce the downward flow speed of water. The humidification unit (34) completes the continuous water supply and maintenance operation on this basis. The regulating mechanism (4) is located on the left side of the protective mechanism (1). A water inlet pipe (5) is installed on the left side of the regulating mechanism (4). Water is supplied to the storage cylinder (31) through the cooperation of the regulating mechanism (4) and the water inlet pipe (5).

2. The spray curing device for the pile head of cast-in-place piles used in deep foundation pit construction of rail transit engineering according to claim 1, characterized in that: The protective mechanism (1) includes a first arc-shaped cover (11), a rotating shaft (12) is fixedly connected to the rear end of the first arc-shaped cover (11), a second arc-shaped cover (13) is rotatably connected to the right side of the rotating shaft (12), a buckle (14) is fixedly connected to the front end of the second arc-shaped cover (13), and a rubber skirt (15) is fixedly connected to the lower ends of the first arc-shaped cover (11) and the second arc-shaped cover (13).

3. The spraying and curing device for the pile head of cast-in-place piles used in deep foundation pit construction of rail transit engineering according to claim 2, characterized in that: The top mechanism (2) includes a top cover (21), the lower end of which is fixedly connected to the upper end of the first arc-shaped cover (11). An internal thread block (22) is fixedly connected to the middle of the upper side of the top cover (21). A threaded column (23) is threadedly connected to the middle of the internal thread block (22). A turntable (24) is fixedly connected to the upper end of the threaded column (23). A limit plate (25) is fixedly connected to the lower end of the threaded column (23). Two sets of symmetrical guide plates (26) are fixedly connected to the lower end of the top cover (21). There are two guide plates (26) in each set.

4. The spray curing device for the pile head of cast-in-place piles used in deep foundation pit construction of rail transit engineering according to claim 3, characterized in that: The upper end of the storage cylinder (31) is provided with a placement groove (35), and the lower end of the limiting plate (25) is rotatably connected to the inside of the limiting plate (25). A limiting block (36) is provided between the two guide plates (26) in each group and is fixedly connected to the outer wall of the storage cylinder (31). A water pipe connecting hose (37) is fixedly connected to the left side of the storage cylinder (31), and the connecting hose (37) is connected to the adjustment mechanism (4).

5. The spray curing device for the pile head of cast-in-place piles used in deep foundation pit construction of rail transit engineering according to claim 3, characterized in that: The humidification unit (34) includes a fixing block (341), the upper end of the fixing block (341) is fixedly connected to the lower end of the storage cylinder (31), and a sponge pad (342) is fixedly connected to the lower end of the fixing block (341). The sponge pad (342) is made of multiple layers of cotton cloth. A central water passage groove (343) is provided inside the fixing block (341), and an edge water passage groove (344) is provided inside the fixing block (341). The upper diameter of the central water passage groove (343) is smaller than the upper diameter of the edge water passage groove (344). The edge water passage groove (344) is located outside the central water passage groove (343). The lower sides of both the central water passage groove (343) and the edge water passage groove (344) are flush with the lower side of the fixing block (341).

6. The spray curing device for the pile head of cast-in-place piles used in deep foundation pit construction of rail transit engineering according to claim 4, characterized in that: The regulating mechanism (4) includes a water tank (41), a diversion block (42) is fixedly connected to the left side of the water tank (41), a matching groove (43) is opened in the middle of the diversion block (42), a blocking unit (44) is provided on the right side of the matching groove (43), and a water delivery pipe (45) connected to a water pipe connecting hose (37) is fixedly connected to the upper end of the water tank (41).

7. A spray curing device for the pile head of cast-in-place piles used in deep foundation pit construction of rail transit engineering according to claim 6, characterized in that: The blocking unit (44) includes a frustum block (441), which fits into the right side of the fitting groove (43). A rubber layer is provided on the left side of the frustum block (441), and a symmetrical positioning groove (442) is provided on the right side of the frustum block (441). A limiting rod (443) is slidably connected in the positioning groove (442). A receiving groove (444) is provided in the middle of the right side of the frustum block (441), and a support rod (445) is slidably connected in the receiving groove (444). A compression spring (446) is fixedly connected between the left end of the support rod (445) and the inner wall of the receiving groove (444). The right ends of the limiting rod (443) and the support rod (445) are both fixedly connected to the inner wall of the water tank (41).

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