Construction method of cast-in-place piles for ramp wharf in mountainous areas

Abstract

The present application relates to the field of bored pile construction technology, and in particular to a method for constructing bored piles for a ramp wharf in a mountainous inland river, which includes the steps of burying a steel casing: during the burying of the steel casing, at least three circumferentially distributed guide components are arranged around the steel casing, the guide components abut against the outer wall of the steel casing and are used to limit the deflection of the steel casing; the inclination of the part of the guide component abutting against the steel casing is less than 0.5%, and the offset of the guide component is less than 10 cm. The present application can limit the deflection of the steel casing through the guide component, and play a guiding role in the process of burying the steel casing in the river channel, so as to effectively reduce the possibility of deflection and deformation of the steel casing, thereby achieving the purpose of stably maintaining the verticality of the steel casing.

Description

Technical Field

[0001] The present application relates to the field of bored pile construction technology, and in particular to a method for constructing bored piles for a ramp wharf on an inland river in a mountainous area. Background Art

[0002] A wharf is a building mainly used for the circulation of people and goods. It is mainly built on the shores of canals, lakes, seas, etc. for ships to dock. However, in actual construction, especially in inland river areas in mountainous areas, due to the large change in water level, a straight wharf is not suitable for inland rivers in mountainous areas. At this time, a ramp with a certain slope needs to be built to allow ships to dock at different water levels.

[0003] In order to ensure that the water level is relatively sufficient when the ship docks to avoid the ship running aground, the ramp often needs to be connected to the inner river through pile foundations. In order to ensure the quality of the pile foundation when pouring the pile foundation, cast-in-place piles surrounded by steel casings are often used to separate the river channel from the concrete and reduce the possibility of hole collapse during drilling.

[0004] When burying the steel casing, it is necessary to bury the steel casing in the river channel by hammering. Due to the different geology in the river channel and the influence of the force during hammering, the steel casing is easily deflected. In the prior art, in order to ensure that the steel casing is set vertically, it is often necessary to periodically detect the verticality and position of the steel casing. Thereafter, according to the angle of deflection, the top of the steel casing is pushed by a hydraulic fixed push rod so that the steel casing can be reset. However, when using this method, it is often easy to cause deformation of the part where the steel casing is pushed because the steel casing is locally stressed and the force direction is the radial direction of the steel casing, which affects the construction of the cast-in-place piles. Therefore, how to relatively stably maintain the verticality of the buried steel casing is a problem that urgently needs to be solved. Summary of the invention

[0005] In order to relatively stably maintain the verticality of the buried steel casing, the present application provides a method for constructing cast-in-place piles for a ramp wharf on an inland river in a mountainous area.

[0006] The present application provides a method for constructing cast-in-place piles for a ramp wharf in a mountainous area, which adopts the following technical solution:

[0007] A construction method for cast-in-place piles of a ramp wharf on an inland river in a mountainous area comprises the steps of burying a steel casing: during the burying of the steel casing, at least three circumferentially distributed guide components are arranged around the steel casing, the guide components abut against the outer side wall of the steel casing and are used to limit the deflection of the steel casing.

[0008] The inclination of the portion of the guide component abutting against the steel casing is less than 0.5%, and the offset of the guide component is less than 10 cm.

[0009] By adopting the above technical scheme, during the process of burying the steel casing, multiple guide components can limit the deflection of the steel casing through different positions, and play a guiding role in the process of burying the steel casing in the river channel, so as to effectively reduce the possibility of deflection and deformation of the steel casing, thereby achieving the purpose of stably maintaining the verticality of the steel casing.

[0010] Optionally, the step of connecting the steel casing is also included: based on the previously buried steel casing, two vertically staggered and stacked support members are arranged around the top of the steel casing, and the support members include at least two support beams arranged around the steel casing. The support members located below are used as a support foundation and are placed on a platform or the ground. Fixed seats are welded around the steel casing so that the fixed seats abut against the support beams to achieve the positioning of the steel casing.

[0011] Afterwards, the continued steel casing is welded on the top of the positioned steel casing by hoisting.

[0012] By adopting the above technical solution, when the depth of the bored pile is relatively deep, the requirement of the pile hole depth can be met by connecting the steel casing. In this process, the fixing seats are temporarily welded and abutted against the supporting beam through the fixing seats of different heights to achieve stable positioning of the steel casing when connecting the steel casing, thereby reducing the possibility of deflection of the steel casing when connecting the steel casing.

[0013] Optionally, the guide component includes a vertically arranged guide beam and a guide wheel rotatably arranged on the guide beam, and the guide wheel rolls against the outer wall of the steel casing.

[0014] By adopting the above technical solution, the influence on the anti-corrosion performance of the steel casing caused by scratches on the outer wall of the steel casing due to slight deflection, vibration, etc. during the burial of the steel casing can be reduced.

[0015] Optionally, the part of the guide component abutting against the steel casing is provided with a plurality of vertically distributed pressure detection points, which are used to monitor the pressure applied radially by the steel casing to the guide component and are respectively recorded as F1, F2...Fn from bottom to top, and a threshold range Fy±X is set for the pressure applied by the steel casing to the guide component.

[0016] Compare F1, F2...Fn with Fy. If F1, F2...Fn are all greater than Fy+X or less than Fy-X, the steel casing is offset. At this time, if the offset exceeds the preset value, it is necessary to reposition and re-bury the steel casing. If the offset does not exceed the preset value, continue to vertically hammer and bury the steel casing.

[0017] If some of F1, F2...Fn are greater than Fy+X and some are less than Fy-X; or F1, F2...Fn increase successively, the steel casing will deflect. At this time, it is necessary to eccentrically hammer the part of the top of the steel casing where the pressure value is less than Fy-X until F1, F2...Fn are all within the threshold range Fy±X for correction.

[0018] If F1, F2, ..., Fn are within the threshold range Fy±X, the steel casing has not deflected or the deflection is within the allowable range, and vertical hammering is continued to bury the steel casing.

[0019] By adopting the above technical scheme, there is no need to detect the displacement of the steel casing in real time during the burying of the steel casing. It is only necessary to judge whether the steel casing is deflected by the change in the pressure value applied to the guide component during the displacement of the steel casing. In this process, the deflection state of the steel casing can be further quickly judged through the difference in force at different positions around the steel casing, and the steel casing can be deflected with a more precise eccentric hammer position to avoid the possibility of excessive correction or directional misalignment.

[0020] Optionally, if some of F1, F2...Fn are greater than Fy+X and some are less than Fy-X; then the difference between the maximum value of F1, F2...Fn and Fy+X is recorded as Fm, the value of Fm is divided into different levels and the pressure applied to the steel casing during correction is set according to the Fm values ​​of different levels.

[0021] By adopting the above technical solution, the eccentric hammering force of the steel casing can be more conveniently controlled, thereby further accurately correcting the deviation of the steel casing.

[0022] Optionally, a gasket is provided at the top of the steel casing, and the gasket is provided with an annular groove adapted to the opening edge of the top of the steel casing, and the opening edge of the top of the steel casing is clamped in the annular groove.

[0023] By adopting the above technical solution, the gasket ring can transfer the impact force it receives relatively evenly to various parts of the stress-bearing part of the steel casing, so as to reduce the possibility of deflection of the steel casing. At the same time, it can also limit the deformation of the edge of the steel casing through the annular groove, so as to further reduce the possibility of deformation of the steel casing due to correction.

[0024] Optionally, an adjustment assembly for adjusting the position of pressure applied to the gasket is provided on the top of the gasket, and the adjustment assembly includes a plurality of telescopic adjustment parts for bearing pressure and burying the steel casing in the river channel, and a locking control part for respectively controlling the sliding locking of the plurality of telescopic adjustment parts, and the telescopic adjustment parts are provided on the top of the gasket.

[0025] By adopting the above technical scheme, when correcting the deviation or burying the steel casing, it is only necessary to hammer several telescopic adjustment parts. When correcting the deviation, it is only necessary to control the free sliding of the telescopic adjustment parts that do not need to be hammered through the locking control parts. At this time, when hammering multiple telescopic adjustment parts, some of the telescopic adjustment parts will freely expand and contract, so that the pressure generated by the hammering can be transmitted to the gasket through the sliding locked telescopic adjustment parts, so that the force on the steel casing is in an eccentric state, thereby realizing the correction of the deviation of the steel casing.

[0026] Optionally, the telescopic adjustment member includes two adjustment tubes which are mutually socketed and slidably arranged, and the adjustment tubes are parallel to the central axis of the gasket. One of the adjustment tubes is fixedly connected to the top of the gasket, and the other adjustment tube is used to withstand the pressure of pushing the steel casing to be buried in the river channel.

[0027] The interiors of the two adjustment tubes are filled with oil buffer, and the locking control member is used to control the buffer to flow out of the adjustment tubes or to seal the interior spaces of the two adjustment tubes.

[0028] By adopting the above technical solution, when the steel casing needs to be corrected, it is only necessary to allow the buffer solution in part of the adjustment tube to flow out through the locking control component, while the buffer solution in the adjustment tube of the remaining telescopic adjustment component is sealed in the adjustment tube, so that part of the telescopic adjustment component can be freely retracted and retracted, while the remaining telescopic adjustment component is in a sliding locked state, so that the telescopic adjustment component in the locked state can transfer pressure to the gasket to achieve the effect of eccentric hammering and achieve the effect of correction.

[0029] Optionally, the locking control component includes a locking container and a plurality of locking valves. The locking container is connected to the gasket and is connected one by one to the adjustment tube fixedly connected to the gasket through a pipeline. The locking valve is arranged in the pipeline connected to the adjustment tube and is used to control the flow of buffer solution in the adjustment tube.

[0030] By adopting the above technical solution, when it is required that part of the telescopic adjustment member can slide freely, it is only necessary to open the locking valve so that the buffer solution in the adjustment tube can flow into the locking container.

[0031] Optionally, a return spring for returning the two adjustment tubes to return to their original position is arranged inside the two adjustment tubes that are sleeved together.

[0032] By adopting the above technical solution, the two adjustment tubes can be reset after hammering, and the adjustment tubes of multiple telescopic adjustment members can be at the same height, so as to facilitate the subsequent burying of the steel casing.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. During the process of burying the steel casing, multiple guide components can limit the deflection of the steel casing at different positions and guide it during the burying process to effectively reduce the possibility of deflection and deformation of the steel casing, thereby achieving the purpose of stably maintaining the verticality of the steel casing;

[0035] 2. During the correction process, the verticality change of the steel casing is monitored by the change of the pressure value at the pressure detection point, without the need to regularly detect the verticality of the steel casing itself, which can effectively optimize the timeliness of discovering the steel casing and the accuracy of correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flowchart of the construction method in Example 1 of the present application.

[0037] Figure 2 This is a schematic diagram of the guide component in use in Example 1 of the present application.

[0038] Figure 3 It is a schematic diagram of the structure of the support components in the steel casing splicing step of Example 1 of the present application.

[0039] Figure 4 This is a schematic diagram of the guide component in use in Example 2 of the present application.

[0040] Figure 5 It is a structural diagram of the adjustment component in Example 2 of the present application.

[0041] Figure 6 It is a schematic diagram of the cross-sectional structure of the adjustment assembly and the steel casing in Example 2 of the present application.

[0042] Explanation of the reference numerals in the accompanying drawings: 1. Steel casing; 11. Fixed seat; 2. Guide component; 21. Guide beam; 22. Guide wheel; 23. Pressure detection point; 24. Gasket; 241. Ring groove; 3. Support member; 31. Support beam; 4. Adjustment assembly; 41. Telescopic adjustment member; 411. Adjustment tube; 412. Return spring; 42. Locking control member; 421. Locking container; 422. Locking valve; 43. Connecting ring; 431. Connecting plate; 432. Connecting beam. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-6 This application is described in further detail.

[0044] The embodiment of the present application discloses a method for constructing cast-in-place piles for a ramp wharf on an inland river in a mountainous area.

[0045] Example 1

[0046] Reference Figure 1 and Figure 2The construction method of cast-in-place piles for the ramp wharf in the mountainous area includes the following steps:

[0047] S1. Steel casing burial: Before the steel casing 1 is buried, advanced surveying and layout are carried out. Specifically, during the surveying and layout, the pile position and elevation are laid out according to the joint survey control points and elevation control points, and a verification system is implemented to ensure that the pile position axis is accurate.

[0048] The steel casing 1 should be processed and formed in the factory and then transported to the site for extension. The rust removal level should reach Sa2.5, and epoxy asphalt paint should be applied on the surface of the steel casing 1 with a film thickness of not less than 350μm. The ovality of the steel casing 1 should not exceed 5mm and the staggered seam should not exceed 3mm.

[0049] During the process of burying the steel casing 1, at least three circumferentially distributed guide components 2 are arranged around the steel casing 1. In the embodiment of the present application, four guide components 2 are arranged, and the guide components 2 are vertically arranged positioning channel steels. The guide components 2 abut against the outer wall of the steel casing 1 and are connected to the ground through a platform during on-site construction, so as to play a guiding role when burying the steel casing 1 and limit the deflection of the steel casing 1. This reduces the probability of needing to eccentrically hammer the steel casing 1 for deviation correction, and achieves the purpose of relatively stably maintaining the verticality of the buried steel casing.

[0050] Specifically, when the steel casing 1 is buried, the planar position deviation between the center and the center of the pile foundation is less than 50 mm, the inclination of the steel casing 1 in the vertical direction is less than 0.5% and the offset is less than 10 cm. During the burial process, the steel casing 1 is buried using a crane and a vibrating hammer with double clamps, and the length of the steel casing 1 is arranged to be no less than 2 m when entering the medium-weathered rock surface.

[0051] S2, Steel casing connection: refer to Figure 3 When the cast-in-place pile is relatively long, it is necessary to continue the above-water steel casing 1. At this time, based on the first buried steel casing 1, two vertically staggered support members 3 are arranged around the top of the steel casing 1.

[0052] Specifically, the support member 3 includes at least two support beams 31 arranged around the steel casing 1. In the embodiment of the present application, the support member 3 includes two support beams 31 symmetrically arranged on both sides of the steel casing 1, and the support beams 31 of the two support members 3 are arranged perpendicular to each other. The support member 3 located at the bottom is used as a supporting foundation and placed on a platform or the ground, that is, the two support beams 31 located at the bottom support member 3 are overlapped on the platform or the ground and arranged horizontally, and the two support beams 31 of the upper support member 3 are overlapped on the two support beams 31 of the lower support member 3. Thereafter, the fixing seat 11 is welded on the peripheral side of the steel casing 1, and the fixing seat 11 is arranged one-to-one corresponding to the support beams 31, and the fixing seat 11 is overlapped on the support beams 31 one-to-one, thereby realizing the positioning of the steel casing 1.

[0053] After the buried steel casing 1 is fixed, the connected steel casing 1 is aligned with the opening at the top of the buried steel casing 1 by hoisting. After that, the upper and lower sections of the steel casing are temporarily connected and fixed with steel plates, and then the steel casing is welded firmly with multiple layers to achieve stable connection of the steel casing 1.

[0054] S3. Drilling: Use a drilling rig to drill the pile holes, and the drilling process adopts the impact drilling construction technology.

[0055] S4. Slag cleaning: The drilling slag in the pile hole is cleaned in time by replacing the mud with filters, or cleaned in real time by a slag bucket. After the pile hole is drilled, the center deviation of the void, hole depth and hole diameter are tested. After meeting the design requirements, the steel cage is placed.

[0056] S5. Concrete pouring: The concrete is underwater concrete. Sufficient fluidity should be maintained during the pouring of concrete. The slump of the concrete is 180-220mm. No pauses should be made during the pouring process to maintain continuity. In addition, the actual poured pile top elevation should be more than 0.8m higher than the design elevation.

[0057] Example 2

[0058] Reference Figure 4 The difference between this embodiment and the embodiment 1 is that the guide component 2 includes a guide beam 21 and a plurality of guide wheels 22 rotatably connected to the guide beam 21, and the guide beam 21 is vertically arranged and fixedly connected to the construction platform. The guide wheel 22 rolls against the outer wall of the steel casing 1, and the rotation plane of the guide beam 21 is parallel to the steel casing 1, so as to reduce the wear on the outer wall of the steel casing 1 and the influence on the anti-rust treatment coating on the outer surface of the steel casing 1 while positioning the steel casing 1.

[0059] At the same time, a plurality of vertically distributed pressure detection points 23 are provided at the portion of the guide component 2 abutting against the steel casing 1 for monitoring the radial pressure of the steel casing 1 applied by the steel casing 1 to various points on the guide component 2 during the burial of the steel casing 1 .

[0060] Specifically, the pressure detection point 23 is arranged at the rotation connection part between the guide wheel 22 and the guide beam 21, for example, the pressure detection point 23 is a pressure sensor arranged at the rotation connection part between the guide wheel 22 and the guide beam 21. The pressures detected by different pressure detection points 23 on the same guide component 2 are respectively recorded as F1, F2...Fn from bottom to top, and a threshold Fy is set for the pressure applied by the steel casing 1 to the guide wheel 22, and a threshold range Fy±X is set. Among them, Fy is the standard pressure value applied to the guide wheel 22 during the process of the steel casing 1 being buried vertically in the river channel according to a predetermined trajectory, and X is the pressure difference applied by the steel casing 1 to the guide beam 21 within the allowable deflection and deviation range.

[0061] During the burying process of the steel casing 1, F1, F2, ..., Fn are compared with the threshold range Fy±X in real time according to the frequency of hammering.

[0062] If F1, F2...Fn are all greater than Fy+X or less than Fy-X, it is determined that the steel casing 1 is offset. At this time, the offset between the steel casing 1 and the predetermined center axis of the pile hole is detected. If the offset exceeds the predetermined value, the steel casing needs to be repositioned and reburied. If the offset does not exceed the predetermined value, continue to maintain vertical hammering to bury the steel casing 1.

[0063] Specifically, if F1, F2...Fn on some guide components 2 are all greater than Fy+X, and at the same time, F1, F2...Fn on the guide components 2 located at the relative position of the steel casing 1 are all less than Fy-X, it can be determined that the steel casing 1 is radially offset toward the guide component 2 where F1, F2...Fn are all greater than Fy+X.

[0064] If part of F1, F2...Fn on the same guide component 2 is greater than Fy+X, and part of F1, F2...Fn is less than Fy-X; or F1, F2...Fn increases successively, and the outer wall of the steel casing 1 is inclined relative to the guide beam 21, it can be determined that the steel casing 1 is deflected. At this time, it is necessary to control the vibrating hammer to eccentrically hammer the top of the steel casing 1 with a pressure value less than Fy-X, so that the steel casing 1 deflects in the opposite direction of the deflection until F1, F2...Fn are all within the threshold range Fy±X for correction.

[0065] At the same time, by setting the X value, a slight correction process can be performed in real time, which can effectively reduce the force of the eccentric hammering on the top edge of the steel casing 1, thereby reducing the possibility of deformation of the steel casing 1, thereby achieving the purpose of maintaining the verticality of the steel casing 1.

[0066] If F1, F2, ..., Fn are all within the threshold range Fy±X, then the steel casing 1 has not deflected or the deflection is within the allowable range, and the steel casing 1 can be buried by continuing the vertical hammering.

[0067] In addition, in order to further optimize the correction effect of the steel casing 1, after the steel casing 1 is judged to be deflected, that is, if some of F1, F2...Fn on the same guide component 2 are greater than Fy+X, and some are less than Fy-X; then the difference between the maximum value of F1, F2...Fn and Fy+X is recorded as Fm. The value of Fm is divided into different levels and the pressure applied to the steel casing 1 during correction is set according to the different levels of Fm values.

[0068] For example, Fm is graded into Fm1, Fm2, ... Fmn in accordance with nKN. If Fm1≤Fm<Fm2, the force of the vibrating hammer eccentrically hammering the steel casing is controlled to be Fc kN; if Fm2≤Fm<Fm3, the force of the vibrating hammer eccentrically hammering the steel casing is controlled to be Fc+c kN; if Fm3≤Fm<Fm4, the force of the vibrating hammer eccentrically hammering the steel casing is controlled to be Fc+2c kN... If Fmn-1≤Fm<Fmn, the force of the vibrating hammer eccentrically hammering the steel casing is controlled to be Fc+(n-2) kN, so as to further realize the fine adjustment of the deviation correction of the steel casing 1.

[0069] Reference Figure 5 and Figure 6 At the same time, since the top of the steel casing 1 will be subjected to eccentric hammering, in order to reduce the possibility of deformation of the top of the steel casing 1 due to the eccentric local hammering, a gasket 24 is provided on the top of the steel casing 1.

[0070] The gasket ring 24 is arranged coaxially with the steel casing 1, and an annular groove 241 is provided on the lower end surface of the gasket ring 24. The opening edge of the top of the steel casing 1 is inserted into the annular groove 241 to reduce the force on the top of the steel casing 1 and assist in transmitting the impact to various parts of the steel casing 1. At the same time, the deformation of the top of the steel casing 1 can be limited by the annular groove 241.

[0071] Specifically, in order to further optimize the convenience during deviation correction, an adjustment component 4 for adjusting the pressure position applied to the gasket 24 is provided on the top of the gasket 24 .

[0072] Reference Figure 5 and Figure 6 The adjustment assembly 4 includes a plurality of telescopic adjustment members 41 and a locking control member 42 for controlling the sliding locking of the telescopic adjustment members 41 . The telescopic adjustment members 41 are fixedly connected to the top of the gasket 24 and are parallel to the central axis of the steel casing 1 .

[0073] The telescopic adjustment member 41 includes two adjustment tubes 411 which are coaxially sleeved and slidably arranged. The ends of the two adjustment tubes 411 which are far from each other are closed, and one of the adjustment tubes 411 is fixedly connected to the end face of the gasket 24 away from the end of the steel casing 1, and the other adjustment tube 411 is used to withstand the pressure when the vibration hammer is hammered. When burying the steel casing 1, if correction is required, it is only necessary to control the relative free sliding of the adjustment tubes 411 of the corresponding part of the top of the steel casing 1 other than the part that needs to be hammered by the locking control member 42, and the two adjustment tubes 411 of the telescopic adjustment member 41 of the part that needs to be hammered on the top of the steel casing 1 are slidingly locked. At this time, it is only necessary to hammer the adjustment tubes 411 of multiple telescopic adjustment members 41 with a vibration hammer. Since some of the adjustment tubes 411 can slide relatively, the pressure of the vibration hammer is transmitted to the gasket 24 by means of the slidingly locked telescopic adjustment member 41, so that when the vibration hammer is hammering vertically, part of the steel casing 1 can still be subjected to force, so as to achieve the effect of eccentric hammering and the correction effect.

[0074] In order to achieve the control of the sliding between the two adjustment tubes 411 , the two adjustment tubes 411 are filled with oil buffer, and the locking control member 42 controls the flow of the buffer to achieve the sliding locking and free sliding control of the two adjustment tubes 411 .

[0075] Reference Figure 5 and Figure 6 Specifically, the locking control member 42 includes a locking container 421 and a plurality of locking valves 422. The locking container 421 has a variable internal space or is connected to the outside. For example, the locking container 421 is a container with an opening on the top or a piston cylinder with a sealing opening inside, so as to realize the variable internal space of the locking container 421. At the same time, the locking container 421 is fixedly connected to the inner ring edge of the gasket 24 through a plurality of connecting rods, and the inner cavity of the locking container 421 is fixedly connected to the adjustment tube 411 fixedly connected to the gasket 24 through a plurality of pipelines, and the locking valves 422 are installed one by one on the pipelines connected to the adjustment tube 411 to control the flow of the buffer solution. Among them, the locking valve 422 can be a control valve that meets practical pressure conditions, such as a solenoid valve.

[0076] When in use, it is necessary to allow part of the telescopic adjustment member 41 to slide freely so that when the steel casing 1 is subjected to eccentric force for correction, only part of the locking valve 422 is needed to control the adjustment tube 411 at the corresponding position on the steel casing 1 to be connected with the locking container 421, so that when subjected to force, the two adjustment tubes 411 can be contracted to avoid air, thereby allowing the steel casing 1 to be subjected to eccentric force.

[0077] Reference Figure 5 and Figure 6In addition, in order to reset the two adjustment tubes 411, reset springs 412 are provided inside the two adjustment tubes 411, and the two ends of the reset springs 412 are respectively abutted against the ends of the two adjustment tubes 411 that are away from each other, and the reset springs 412 and the adjustment tubes 411 are arranged coaxially, so that after the vibration hammer is struck, the reset springs 412 can push the two adjustment tubes 411 to reset and make the tops of the multiple telescopic adjustment members 41 in the same plane. In order to limit the sliding stroke of the adjustment tubes 411, the opening edges of the two adjustment tubes 411 are bent toward each other and buckled with each other.

[0078] Finally, in order to reduce the possibility of multiple telescopic adjustment members 41 being skewed, the adjustment tube 411 in the telescopic adjustment member 41 away from the gasket 24 is provided with a connecting ring 43. The connecting ring 43 includes a plurality of arc-shaped connecting plates 431. In the embodiment of the present application, twelve connecting plates 431 are provided, and the twelve connecting plates 431 are successively distributed along a circular path and are arranged coaxially with the steel casing 1. The inner sides of the twelve connecting plates 431 are fixedly connected with connecting beams 432, and the connecting beams 432 are fixedly connected to each other, and the connecting beams 432 are made of elastic material, such as steel, so as to adapt to the slippage of the adjustment tube 411 through elastic deformation when subjected to force.

[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for constructing cast-in-place piles for a ramp wharf in a mountainous area, characterized in that: The method comprises the following steps: during the burying of the steel casing (1), at least three circumferentially distributed guide components (2) are arranged on the circumference of the steel casing (1), wherein the guide components (2) abut against the outer wall of the steel casing (1) and are used to limit the deflection of the steel casing (1); The inclination of the portion of the guide component (2) abutting against the steel casing (1) is less than 0.5%, and the offset of the guide component (2) is less than 10 cm; The portion of the guide component (2) abutting against the steel casing (1) is provided with a plurality of vertically distributed pressure detection points (23), the pressure detection points (23) being used to monitor the pressure applied by the steel casing (1) to the guide component (2) in the radial direction and being respectively recorded as F1, F2, ..., Fn from bottom to top, and a threshold range Fy±X is provided for the pressure applied by the steel casing (1) to the guide component (2); Compare F1, F2 ... Fn with Fy. If F1, F2 ... Fn are all greater than Fy+X or less than Fy-X, the steel casing (1) is offset. If the offset exceeds a predetermined value, the steel casing needs to be repositioned and reburied. If the offset does not exceed the predetermined value, the steel casing (1) is continuously buried by vertical hammering. If some of F1, F2, ..., Fn are greater than Fy+X, and some are less than Fy-X; or F1, F2, ..., Fn increase successively, the steel casing (1) deflects. At this time, it is necessary to eccentrically hammer the portion of the top of the steel casing (1) where the pressure value is less than Fy-X until F1, F2, ..., Fn are all within the threshold range Fy±X, for correction. If F1, F2, ..., Fn are within the threshold range Fy±X, then the steel casing (1) has not deflected or the deflection is within the allowable range, and vertical hammering is continued to bury the steel casing (1).

2. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 1, characterized in that: The method also includes the following steps: connecting the steel casing: based on the previously buried steel casing (1), two vertically staggered and stacked support members (3) are arranged around the top of the steel casing (1), wherein the support members (3) include at least two support beams (31) arranged around the steel casing (1), the support member (3) located at the bottom is used as a support foundation and is placed on a platform or the ground, and a fixing seat (11) is welded around the steel casing (1) so that the fixing seat (11) abuts against the support beam (31) to achieve positioning of the steel casing (1); Thereafter, a connected steel casing (1) is welded on top of the positioned steel casing (1) by hoisting.

3. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 1, characterized in that: The guide component (2) comprises a guide beam (21) arranged vertically and a guide wheel (22) rotatably arranged on the guide beam (21), wherein the guide wheel (22) rolls against the outer wall of the steel casing (1).

4. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 1, characterized in that: If some of F1, F2, ..., Fn are greater than Fy+X, and some are less than Fy-X; then the difference between the maximum value of F1, F2, ..., Fn and Fy+X is recorded as Fm, and the value of Fm is divided into different levels and the pressure applied to the steel casing (1) during correction is set according to the different levels of Fm values.

5. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 1, characterized in that: A gasket ring (24) is provided at the top of the steel casing (1), and the gasket ring (24) is provided with an annular groove (241) adapted to the opening edge of the top of the steel casing (1), and the opening edge of the top of the steel casing (1) is clamped in the annular groove (241).

6. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 5, characterized in that: An adjustment assembly (4) for adjusting the position of the pressure applied to the gasket (24) is arranged at the top of the gasket (24); the adjustment assembly (4) comprises a plurality of telescopic adjustment members (41) for bearing the pressure and burying the steel casing (1) in the river channel, and a locking control member (42) for respectively controlling the sliding locking of the plurality of telescopic adjustment members (41); the telescopic adjustment members (41) are arranged at the top of the gasket (24).

7. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 6, characterized in that: The telescopic adjustment member (41) comprises two adjustment tubes (411) which are sleeved and slidably arranged on each other, wherein the adjustment tubes (411) are parallel to the central axis of the gasket (24), wherein one of the adjustment tubes (411) is fixedly connected to the top of the gasket (24), and the other adjustment tube (411) is used to withstand the pressure of pushing the steel casing (1) to be buried in the river channel; The interiors of the two adjustment tubes (411) are filled with oil buffer, and the locking control component (42) is used to control the buffer to flow out of the adjustment tubes (411) or to seal the interior spaces of the two adjustment tubes (411).

8. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 7, characterized in that: The locking control component (42) comprises a locking container (421) and a plurality of locking valves (422); the locking container (421) is connected to the gasket (24) and is connected one by one to an adjustment tube (411) fixedly connected to the gasket (24) through a pipeline; the locking valve (422) is arranged in a pipeline connected to the adjustment tube (411) and is used to control the flow of a buffer solution in the adjustment tube (411).

9. The method for constructing cast-in-place piles for a ramp wharf in a mountainous area according to claim 7, characterized in that: A return spring (412) is arranged inside the two mutually sleeved adjustment tubes (411) to return the two tubes to their original positions.

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