Construction method of lowering and installing deviation correction device for steel casing

Abstract

The present invention provides a device and construction method for correcting the installation of steel casings, comprising a push rod, steel casing ear plates and platform ear plates respectively arranged at both ends of the push rod and connected to the push rod through a pin, wherein the steel casing ear plates are used to connect the steel casings, the platform ear plates are used to connect the platforms, and the push rod is used to provide a radial force along the steel casing during the lowering of the steel casing. The device and construction method for correcting the installation of steel casings can quickly, accurately and effectively realize automatic correction of the steel casings when they are lowered.

Description

[Technical field]

[0001] The invention relates to the technical field of building construction, and in particular to a steel casing lowering installation deviation correction device and a construction method. [Background technology]

[0002] In the process of bored pile construction in karst areas, in order to avoid the collapse of the weak covering layer, the process of following up with super-long steel casing has been widely used. However, due to the thick sand layer and pebble layer of the covering layer, the steel casing is prone to tilt during the installation process, and it is difficult to control the verticality of the steel casing installation.

[0003] In the prior art, in order to prevent the steel casing from tilting during the installation process, the lowered steel casing is often pulled out and re-vibrated until the lowered position of the steel casing is correct. However, this treatment method is not only time-consuming and has great safety hazards, but more importantly, when the steel casing is lowered, a large friction force is generated between the steel casing and the stratum, and the steel casing cannot be pulled out smoothly due to the hindrance of friction. Even if the steel casing is pulled out and lowered again in the same way, it may tilt again, and the treatment effect is not ideal. [Summary of the invention]

[0004] The object of the present invention is to provide a steel casing lowering and installation deviation correction device which can realize automatic deviation correction when the steel casing is lowered and installed.

[0005] Another object of the present invention is to provide a construction method for lowering and installing a deviation-correcting device for a steel casing.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A steel casing lowering and installation correction device comprises a push rod, a steel casing ear plate and a platform ear plate which are respectively arranged at both ends of the push rod and connected to the push rod through a pin shaft, wherein the steel casing ear plate is used to connect the steel casing, the platform ear plate is used to connect the platform, and the push rod is used to provide a radial force along the steel casing during the lowering process of the steel casing.

[0008] Preferably, the push rod is composed of two channel steels arranged back to back, and the openings of the two channel steels face two opposite directions respectively.

[0009] Preferably, the steel casing ear plate and the platform ear plate include a through hole for connecting the pin shaft, and a fixing portion for fixing the steel casing surface or the platform surface, and the fixing portion of the steel casing ear plate is connected to the steel casing surface through a connecting steel plate, and the surface of the connecting steel plate used to contact the steel casing matches the shape of the steel casing.

[0010] Preferably, the fixing portion of the platform ear plate is flush with the platform surface and is fixed to the platform by welding.

[0011] Preferably, a detachable safety pin is provided at the end of the pin shaft.

[0012] A construction method for lowering and installing a deviation-correcting device for a steel casing, which adopts the lowering and installing a deviation-correcting device for a steel casing as described in any one of the above items, comprises the following steps:

[0013] According to the positional relationship between the original position of the steel casing and the target position of the steel casing, the position of the platform jacking point is determined, and one end of the jacking rod is fixed to the platform jacking point;

[0014] Lower the steel casing for installation. When the steel casing is lowered to a certain height, determine the position of the steel casing push point, and fix the other end of the push rod to the corresponding steel casing push point on the steel casing;

[0015] The steel casing is continuously lowered with the platform pushing point as the center. As the steel casing is lowered, the deviation correcting device corrects the deviation of the steel casing.

[0016] Preferably, the step of determining the position of the platform jacking point according to the positional relationship between the original position of the steel casing and the target position of the steel casing comprises:

[0017] The platform jacking point is set at a position which is in the same straight line as the original position of the steel casing and the target position of the steel casing.

[0018] Preferably, the step of determining the position of the steel casing jacking point when the steel casing is lowered to a certain height comprises:

[0019] According to the positional relationship between the original position of the steel casing and the target position of the steel casing, a horizontal deviation correction distance is calculated, and the horizontal deviation correction distance is the horizontal straight-line distance between the original position of the steel casing and the target position of the steel casing;

[0020] Calculate the horizontal straight-line distance between the original position of the steel casing and the platform jacking point;

[0021] Calculate the angle θ between the jacking rod and the platform according to the horizontal deviation correction distance and the horizontal straight-line distance between the original position of the steel casing and the jacking point of the platform;

[0022] The position of the steel casing pushing point is determined according to the angle θ, and the other end of the pushing rod is fixed to the corresponding steel casing pushing point on the steel casing.

[0023] Preferably, in the step of calculating the angle θ between the jacking rod and the platform according to the horizontal deviation correction distance and the horizontal straight-line distance between the original position of the steel casing and the jacking point of the platform, the calculation formula of the angle θ between the jacking rod and the platform is:

[0024] θ = arccos[L / (S+L)];

[0025] Wherein, θ is the angle between the push rod and the platform;

[0026] L-the horizontal straight line distance between the original position of the steel casing and the platform jacking point;

[0027] S-Horizontal correction distance.

[0028] Preferably, the step of the correction device correcting the steel casing comprises:

[0029] As the steel casing is lowered, the correcting device generates a pushing reaction force on the steel casing along the direction of the target position of the steel casing, pushing the steel casing along the direction of the target position of the steel casing; when the pushing rod changes from an inclined state to a horizontal state flush with the platform, the steel casing reaches the target position of the steel casing.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. The steel casing is lowered and installed with a deviation correction device, which connects a push rod with one end fixed on a platform to the steel casing. When the steel casing is lowered, relative displacement occurs between the push rod and the steel casing. The steel casing continues to vibrate and sink to provide power, which further squeezes the push rod. The push rod generates a reverse push force on the steel casing, thereby realizing automatic deviation correction of the steel casing.

[0032] 2. The construction method of the steel casing lowering installation correction device of the present invention can quickly, accurately and effectively realize automatic correction of the steel casing when it is lowered, and the method is simple and convenient to operate, which improves the construction efficiency and greatly reduces the construction cost.

Brief Description of the Drawings

[0033] Figure 1 It is a structural schematic diagram of a typical embodiment of a device for correcting the lowering and installation of a steel casing according to the present invention;

[0034] Figure 2 The present invention is a schematic structural diagram of another embodiment of a device for correcting the lowering and installation of a steel casing according to the present invention. [Specific implementation method]

[0035] The present invention will be further described below in conjunction with the accompanying drawings and exemplary embodiments, wherein the same reference numerals in the accompanying drawings all refer to the same components. In addition, if the detailed description of known techniques is not necessary for illustrating the features of the present invention, it will be omitted.

[0036] When the steel casing is lowered, the bottom of the casing is tilted due to the uneven resistance of the sand layer and the pebble layer. The steel casing needs to ensure the predetermined lowering length and the verticality of the lowering installation must be within the range allowed by the specification, so the lowered steel casing needs to be corrected.

[0037] See also Figure 1-2 The embodiment of the present invention provides a steel casing lowering installation correction device 1, comprising a push rod 101, a steel casing ear plate 102 and a platform ear plate 103 respectively arranged at both ends of the push rod 101 and connected to the push rod 101 through a pin, wherein the steel casing ear plate 102 is used to connect the steel casing 20, the platform ear plate 103 is used to connect the platform 30, and the push rod 101 is used to provide a radial force along the steel casing during the lowering process of the steel casing 20. Preferably, the push rod 101 is composed of two 10# channel steels arranged back to back, and the openings of the two channel steels are facing two opposite directions. The length of the channel steel is 150cm, and a pair of circular holes with a diameter of 50mm are opened at 50mm from the two tail ends of the channel steel, which are used to connect the steel casing ear plate 102 / platform ear plate 103, and the pins 104a, 104b.

[0038] The steel casing ear plate 102 / platform ear plate 103 is respectively composed of two oppositely arranged steel plates, and the two steel plates of the steel casing ear plate 102 / platform ear plate 103 clamp the push rod 101 and restrict the push rod 101 between the two steel plates of the steel casing ear plate 102 / platform ear plate 103. The steel casing ear plate 102 / platform ear plate 103 is preferably made of a steel plate with a thickness of 20 mm and a material of Q235. One end of the steel plate constituting the steel casing ear plate 102 / platform ear plate 103 is set as a rounded corner, and a 50 mm pin hole is opened at the end close to the rounded corner.

[0039] Taking the axial direction of the steel casing 20 as a reference, one end of the pin hole in the steel casing ear plate 102 faces downward. One end of the pin hole in the platform ear plate 103 faces the steel casing 20. The pins 104a, 104b have a diameter of 45 mm and are made of Q345 material. The ends of the pins 104a, 104b are provided with detachable safety pins (not shown). Preferably, the steel casing ear plate 102 and the platform ear plate 103 include through holes (not shown) for connecting the pins 104a, 104b, and fixing parts 1021 / 1031 for fixing the surface of the steel casing 20 or the surface of the platform 30. The fixing part 1021 of the steel casing ear plate 102 is connected to the surface of the steel casing 20 through a connecting steel plate 105. The connecting steel plate 105 is used to contact the surface of the steel casing 20 and match the shape of the steel casing 20. The connecting steel plate 105 is made of Q235 material and is processed from a 20 mm steel plate. Preferably, the steel casing ear plate 102 is fixed to the surface of the steel casing 20 through the connecting steel plate 105, wherein the steel casing ear plate 102 and the connecting steel plate 105, and the connecting steel plate 105 and the steel casing 20 are fixed by welding. The fixing of the steel casing ear plate 102 is achieved by connecting the connecting steel plate 105 whose surface matches the shape of the steel casing 20 with the steel casing, which ensures a stable connection between the deviation correction device 1 and the steel casing 20 on the one hand, and increases the effective area between the deviation correction device 1 and the steel casing 20 on the other hand, preventing the local surface of the steel casing 20 from being subjected to excessive force during the construction process.

[0040] The fixing portion 1031 of the platform ear plate 103 is flush with the surface of the platform 30 and is fixed on the platform 30 by welding.

[0041] The steel casing lowering installation correction device 1 of the present invention connects a push rod 101 with one end fixed on a platform 30 to the steel casing 20. When the steel casing 20 is lowered, it generates relative displacement with the push rod 101. The steel casing 20 continues to vibrate and sink to provide power, further squeezing the push rod 101. The push rod 101 generates a reverse push force on the steel casing 20, thereby realizing automatic correction of the steel casing 20.

[0042] The embodiment of the present invention further provides a construction method for lowering and installing a deviation-correcting device for a steel casing, which adopts the deviation-correcting device 1 for lowering and installing a steel casing as described in any one of the above items, and comprises the following steps:

[0043] According to the positional relationship between the original position of the steel casing and the target position of the steel casing, the position of the platform jacking point is determined, and one end of the jacking rod 101 is fixed to the platform jacking point;

[0044] The steel casing 20 is lowered and installed. When the steel casing 20 is lowered to a certain height, the position of the steel casing push point is determined, and the other end of the push rod 101 is fixed to the corresponding steel casing push point on the steel casing 20;

[0045] The steel casing 20 is further lowered with the platform jacking point as the center. As the steel casing 20 is lowered, the deviation correcting device 1 corrects the deviation of the steel casing 20 .

[0046] Preferably, the step of determining the position of the platform pushing point according to the positional relationship between the original position of the steel casing and the target position of the steel casing comprises: setting the platform pushing point at a position on the same straight line as the original position of the steel casing and the target position of the steel casing.

[0047] The platform pushing point is set on the same straight line as the original position of the steel casing and the target position of the steel casing, ensuring that as the steel casing 20 is lowered, the correction device 1 generates a pushing reaction force on the steel casing along the direction of the target position of the steel casing, pushing the steel casing 20 along the direction of the target position of the steel casing.

[0048] Preferably, when the steel casing 20 is lowered to a certain height, the step of determining the position of the steel casing jacking point comprises:

[0049] According to the positional relationship between the original position of the steel casing and the target position of the steel casing, a horizontal deviation correction distance is calculated, and the horizontal deviation correction distance is the horizontal straight-line distance between the original position of the steel casing and the target position of the steel casing;

[0050] Calculate the horizontal straight-line distance between the original position of the steel casing and the platform jacking point;

[0051] Calculate the angle θ between the jacking rod 101 and the platform 30 according to the horizontal deviation correction distance and the horizontal straight-line distance between the original position of the steel casing and the jacking point of the platform;

[0052] The position of the steel casing pushing point is determined according to the angle θ, and the other end of the pushing rod 101 is fixed to the corresponding steel casing pushing point on the steel casing 20 .

[0053] Preferably, in the step of calculating the angle θ between the jacking rod 101 and the platform 30 according to the horizontal deviation correction distance and the horizontal straight-line distance between the original position of the steel casing and the jacking point of the platform, the calculation formula of the angle θ between the jacking rod 101 and the platform 30 is:

[0054] θ = arccos[L / (S+L)];

[0055] Wherein, θ is the angle between the push rod 101 and the platform 30;

[0056] L-the horizontal straight line distance between the original position of the steel casing and the platform jacking point;

[0057] S-Horizontal correction distance.

[0058] In the calculation formula, according to the relationship between the original position of the steel casing and the jacking rod 101, and the relationship between the target position of the steel casing and the jacking rod 101, it can be known that the sum of the horizontal straight line distance L of the original position of the steel casing from the platform jacking point and the horizontal deviation correction distance S is equal to the length of the jacking rod 101. Therefore, the relationship between the angle θ when the steel casing is in the original position and the horizontal straight line distance of the original position of the steel casing from the platform jacking point and the length of the jacking rod 101 is expressed as: cosθ=[L / (S+L)].

[0059] Preferably, the step of correcting the steel casing 20 by the correction device 1 comprises:

[0060] As the steel casing 20 is lowered, the correcting device 1 generates a pushing reaction force on the steel casing 20 along the direction of the target position of the steel casing, pushing the steel casing along the direction of the target position of the steel casing, and the angle θ between the pushing rod 101 and the platform 30 gradually decreases, and the distance the steel casing is pushed increases. When the pushing rod 101 changes from an inclined state to a horizontal state flush with the platform 30, the steel casing reaches the target position of the steel casing.

[0061] The steel casing 20 is further lowered with the platform pushing point as the center. As the steel casing is lowered, after the deviation correction device 1 corrects the deviation of the steel casing, the following steps are also included:

[0062] Dismantle the deviation-correcting device 1;

[0063] A limiting device is installed around the steel casing 20 that has been corrected, and the next section of the steel casing 20 to be installed is lowered.

[0064] The construction method for installing the deviation correction device for lowering the steel casing of the present invention is to fix one end of the deviation correction device 1 on the platform push point, and connect the other end with the steel casing push point. When the steel casing 20 is lowered, relative displacement is generated with the push rod 101, and the steel casing 20 continues to vibrate and sink to provide power, further squeezing the push rod 101, so that the push rod 101 generates a reverse push force on the steel casing 20, thereby realizing automatic deviation correction of the steel casing 20. The construction method for installing the deviation correction device for lowering the steel casing of the present invention can quickly, accurately and effectively realize automatic deviation correction when the steel casing is lowered, and the method is simple and convenient to operate, improves construction efficiency, and greatly reduces construction costs.

[0065] Although some exemplary embodiments of the present invention have been shown above, it will be appreciated by those skilled in the art that changes may be made to the exemplary embodiments without departing from the principles or spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A construction method for lowering and installing a deviation correction device for a steel casing, characterized in that: The steel casing lowering installation deviation correction device includes a push rod, steel casing ear plates and platform ear plates respectively arranged at both ends of the push rod and connected to the push rod through a pin shaft, wherein the steel casing ear plates are used to connect the steel casing, and the platform ear plates are used to connect the platform, and the push rod is used to provide a radial force along the steel casing during the steel casing lowering process; The construction method for lowering the steel casing and installing the deviation correction device includes the following steps: According to the positional relationship between the original position of the steel casing and the target position of the steel casing, the position of the platform jacking point is determined, including: setting the platform jacking point at a position on the same straight line as the original position of the steel casing and the target position of the steel casing; fixing one end of the jacking rod on the platform jacking point; The steel casing is lowered and installed. When the steel casing is lowered to a certain height, the position of the steel casing jacking point is determined, including: calculating the horizontal deviation correction distance according to the positional relationship between the original position of the steel casing and the target position of the steel casing, the horizontal deviation correction distance being the horizontal straight-line distance between the original position of the steel casing and the target position of the steel casing; calculating the horizontal straight-line distance from the original position of the steel casing to the jacking point of the platform; calculating the distance between the jacking rod and the platform according to the horizontal deviation correction distance and the horizontal straight-line distance from the original position of the steel casing to the jacking point of the platform. Angle θ, the calculation formula of the angle θ is: θ=arccos[L / (S+L)], where θ is the angle between the push rod and the platform, L is the horizontal straight line distance from the original position of the steel casing to the platform push point, S is the horizontal correction distance, the sum of the horizontal straight line distance L from the original position of the steel casing to the platform push point and the horizontal correction distance S is equal to the length of the push rod; determine the position of the steel casing push point according to the angle θ; fix the other end of the push rod to the corresponding steel casing push point on the steel casing; The steel casing is continuously lowered with the platform pushing point as the center. As the steel casing is lowered, the deviation correcting device corrects the deviation of the steel casing.

2. The construction method for lowering and installing the deviation correction device of the steel casing according to claim 1 is characterized in that: The step of the deviation correction device correcting the steel casing comprises: As the steel casing is lowered, the correcting device generates a pushing reaction force on the steel casing along the direction of the target position of the steel casing, pushing the steel casing along the direction of the target position of the steel casing; when the pushing rod changes from an inclined state to a horizontal state flush with the platform, the steel casing reaches the target position of the steel casing.

3. The construction method for lowering and installing the deviation correction device of the steel casing according to claim 1 is characterized in that: The push rod is composed of two channel steels arranged back to back, and the openings of the two channel steels face two opposite directions respectively.

4. The construction method for lowering and installing the deviation correction device of the steel casing according to claim 1 is characterized in that: The steel casing ear plate and the platform ear plate include a through hole for connecting the pin shaft, and a fixing part for fixing the steel casing surface or the platform surface. The fixing part of the steel casing ear plate is connected to the steel casing surface through a connecting steel plate. The surface of the connecting steel plate that contacts the steel casing matches the shape of the steel casing.

5. The construction method for lowering and installing the deviation correction device of the steel casing according to claim 4 is characterized in that: The fixing portion of the platform ear plate is flush with the platform surface and is welded and fixed on the platform.

6. The construction method for lowering and installing the deviation correction device of the steel casing according to claim 1 is characterized in that: The end of the pin shaft is provided with a detachable safety pin.

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