CN115387325B - Construction method for trapped cutting box body of pile machine in TRD construction method - Google Patents

Abstract

The invention discloses a construction method for pulling out a trapped cutting box body of a TRD construction method pile machine, and aims to provide a construction method capable of effectively improving the pulling out and getting rid of trapping capacity of the cutting box body of the TRD construction method pile machine and pulling out the trapped cutting box body of the TRD construction method pile machine. The construction method adopts a top support bracket and a pulling device for construction, and the construction method sequentially comprises the following steps that A, soil around a cutting box body is initially separated, and slurry doped with bentonite is sprayed to the soil around the cutting box body from bottom to top by adopting a high-pressure rotary jet grouting pile machine; b, installing a top support bracket, and fixing the top support bracket on the top of the cutting box body through bolts by using the top support bracket; the vibrating hammer is installed, and the vibrating hammer is fixedly installed on the top support bracket; installing a lifting device, paving a roadbed box on the ground surface, arranging a bottom frame on the roadbed box, enabling the upper end of a cutting box body to penetrate through the bottom frame and a top frame, and enabling a lifting oil cylinder to be positioned between the bottom frame and the top frame; and C, jacking the cutting box body.

Description

A construction method for pulling out the trapped cutting box of the TRD construction method pile driver

Technical field

The present invention relates to a construction method for a TRD pile driver when buried in a drill, and specifically relates to a construction method for pulling out a trapped cutting box of a TRD pile driver.

Background technique

The TRD construction method is a construction method that can form a continuous wall of groundwater soil with equal thickness in situ. During the construction process, the cutting boxes were all underground. Due to the collapse of the trench wall soil, construction machinery failure, improper construction operations, etc., the cutting boxes were adsorbed, clamped, and stuck by the collapsed soil, causing the lifting cylinder of the equipment itself to collapse. Unable to achieve the ability to pull out of trouble. A common practice at present is to attach an external hydraulic cylinder to one side of the cutting box, but the pushing force is still limited, and the pushing force of the external hydraulic cylinder is located on one side of the cutting box because of the eccentric force, which is often still It is difficult to lift up the trapped cutting box, resulting in failure to "salvage" the cutting box and causing huge economic losses to the project and equipment.

Contents of the invention

The object of the present invention is to provide a construction method for pulling out the trapped cutting box of a TRD pile driver, which can effectively improve the pulling-out ability of the cutting box of a TRD pile driver and remove the trapped TRD pile driver. Pull up the cutting box.

The technical solution of the present invention is:

A construction method for pulling out a trapped cutting box of a TRD construction method. The construction method uses a top support bracket and a lifting device. The lifting device includes a bottom frame, a top frame and a top frame located between the bottom frame and the top frame. The construction method of lifting the oil cylinder and pulling out the trapped cutting box of the pile driver using the TRD construction method includes the following steps in sequence:

A. Preliminarily separate the soil around the cutting box. Use a high-pressure jet spray pile machine to spray mud mixed with bentonite from bottom to top on the soil around the cutting box to initially separate the cutting box and the soil around the cutting box. ;

B. Install the top support bracket and fix the top support bracket to the top of the cutting box through bolts;

Install the vibrating hammer and fix the vibrating hammer on the top support bracket;

Install the lifting device, lay the subgrade box on the surface, place the bottom frame on the subgrade box, and the top frame is located between the top support bracket and the bottom frame. The upper end of the cutting box passes through the bottom frame and the top frame, and the lifting cylinder is located between the bottom frame and the bottom frame. between top shelves;

C. Lift the cutting box. (1) The vibration hammer opens the vibrating cutting box; (2) The lifting cylinder lifts the cutting box. The lifting cylinder lifts the top frame and presses it against the top support bracket, and then lifts the cutting box. The lifting cylinder lifts the cutting box through the top frame and the top support bracket.

In the construction method of this plan, in step A, a high-pressure rotary jet pile driver is first used to spray mud mixed with bentonite on the soil around the cutting box, so that the cutting box and the soil around the cutting box are initially separated, thereby effectively Reduce the pulling-out resistance of the trapped cutting box; in this way, under the same jacking force, the pulling-out ability of the cutting box of the TRD pile driver can be effectively improved, and the trapped TRD pile driver can The cutting box is pulled up; then, the vibration of the vibrating hammer further reduces the pulling resistance of the trapped cutting box, and then the cutting box is lifted by the jacking cylinder, thereby effectively reducing the trapped cutting box. The cutting box of the trapped TRD pile driver was pulled up due to the pulling resistance.

Preferably, in step (2), the maximum lifting force exerted by the lifting cylinder on the cutting box through the top frame and the top support bracket is N tons.

As a preference, in step (2), when the lifting force exerted by the lifting cylinder on the cutting box through the top frame and the top support bracket reaches N tons, the lifting cylinder maintains the lifting force of N tons for t minutes. If during this period The lifting cylinder does not lift the cutting box; return to step (1) until the lifting cylinder lifts the cutting box. In this way, the vibration of step (1) and the jacking cycle of step (2) are combined, on the one hand, it is beneficial to pull out the cutting box of the trapped TRD pile driver, and on the other hand, it avoids excessive jacking force in the long term. applied to the cutting box, causing the connecting bolts of the cutting box to break.

Preferably, step A also includes mud liquid replacement, injecting mud liquid into the infusion channel inside the cutting box to dilute or empty the cement and soil slurry inside and around the cutting box to prevent the cement slurry from solidifying into one with the cutting box. In this way, before the cutting box is pulled out, the pulling resistance of the trapped cutting box can be further reduced, thereby improving the pulling out ability of the cutting box of the TRD pile driver.

Preferably, the mud liquid is a mud liquid mixed with a bentonite content of not less than 5%. Bentonite slurry has the function of lubricating the contact interface between the cutting box and the soil, which is beneficial to clearing out the cement and soil slurry inside and around the cutting box, preventing the cement slurry and the cutting box from solidifying into one.

Preferably, there are at least two lifting cylinders, and the lifting cylinders are distributed on opposite sides of the cutting box.

Preferably, step A1 is also included between step A and step B. The specific construction of step A1 is as follows. A wire rope laying device is used to lay the wire rope underground. The wire rope laying device includes a steel wire rope, a limit steel pipe and two guide steel pipes. The lower end of the steel pipe is equipped with a wire rope limit groove, and the steel wire rope passes through the two guide steel pipes in sequence. Both ends of the steel wire rope are equipped with lifting rings; the specific steps of using a wire rope laying device to lay the wire rope underground include:

First, stand the limiting steel pipe and the two guide steel pipes vertically. The two guide steel pipes are distributed on the front and rear sides of the cutting box. The limiting steel pipes are distributed on the left or right side of the cutting box. The wire rope is passed through Pass through the wire rope limit groove;

Second, insert the two guide steel pipes and the limit steel pipe downward into the soil layer until the lower ends of the two guide steel pipes and the limit steel pipe are located at the set distance below the cutting box of the TRD pile driver; this process The middle steel wire rope always passes through the two guide steel pipes, the steel wire rope passes through the steel wire rope limit groove, and both ends of the steel wire rope are above the ground surface;

Then, pull up both ends of the steel wire rope located above the ground until the entire steel wire rope is in a straight state; then pull the limiting steel pipe upward to separate the steel wire rope from the steel wire rope limiting groove;

Then, continue to pull up both ends of the steel wire rope located above the ground until the entire steel wire rope is in a straight state. At this time, the steel wire rope between the lower ends of the two guide steel pipes will be located under the cutting box of the TRD pile driver;

(2) The step also includes the crane and the wire rope lifting and cutting the box, and the crane and the wire rope lifting and cutting the box and the jacking cylinder lifting and cutting the box simultaneously. The specific steps of the crane and the wire rope lifting and cutting the box include: The lifting rings at both ends of the wire rope are hung on the hooks of the crane, and the crane lifts up the lower end of the cutting box through the wire rope.

In the working condition where the cutting box is buried, the clamping force of the buried drill may be too large, exceeding the maximum tensile force that the bolts used to connect two adjacent cutting box units in the cutting box can withstand, resulting in the The bolts connecting two cutting box units are broken, causing part or most of the cutting box to be unable to be pulled out, resulting in huge economic losses to the construction project and equipment. The pulling method of this solution is to solve this problem. For details, please refer to the specific embodiments below.

Preferably, the lifting device further includes vertically distributed telescopic columns, the lower end of the telescopic column is connected to the bottom frame, and the upper end of the telescopic column is connected to the top frame.

Preferably, the top support bracket is a cross beam distributed in a cross shape.

Preferably, the vibrating hammer is a high-frequency vibrating hammer, and the vibrating hammer is fixedly installed on the top support bracket through bolts.

The beneficial effects of the present invention are: it can effectively improve the pulling-out and escape capability of the cutting box of the TRD pile driver, and pull out the trapped cutting box of the TRD pile driver.

Description of the drawings

Figure 1 is a partial structural schematic diagram of a construction method for pulling out a TRD construction method in which a pile driver is trapped in a cutting box according to the first specific embodiment of the present invention.

Figure 2 is a front view of the pulling device of the present invention.

Figure 3 is a schematic three-dimensional structural diagram of the pulling device of the present invention.

Figure 4 is a schematic diagram of a partial structure during the construction process of a TRD construction method in which a pile driver is trapped in a cutting box according to the second specific embodiment of the present invention.

Figure 5 is a partial cross-sectional structural schematic diagram at a-a in Figure 4.

In the picture:

Lifting device 1, bottom frame 1.1, top frame 1.2, lifting cylinder 1.3, telescopic column 1.4;

Top support bracket 2;

Vibrating hammer 3;

Road bed box 4;

Cut box 5;

Guide steel pipe 6.1, limit steel pipe 6.2, wire rope 6.3.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

Specific Embodiment 1: As shown in Figure 1, Figure 2, and Figure 3, a construction method for pulling out a TRD construction method pile driver trapped in a cutting box is constructed using a jacking support bracket 2 and a lifting device 1. The pulling device includes a bottom frame 1.1, a top frame 1.2 and a lifting cylinder 1.3 located between the bottom frame and the top frame. There are at least two lifting cylinders, for example, two or four or six lifting cylinders. In this embodiment, there are four lifting cylinders.

The construction method of pulling out the trapped cutting box of the TRD construction method includes the following steps:

A. Preliminarily separate the soil around the cutting box. Use a high-pressure rotary jet pile machine to spray mud mixed with bentonite on the soil around the cutting box 5 from bottom to top, so that the cutting box and the soil around the cutting box are initially separation.

B. Install the top support bracket and fix the top support bracket to the top of the cutting box through bolts.

Install the vibrating hammer and fix the vibrating hammer 3 on the top support bracket.

Install the lifting device and lay the subgrade box 4 on the ground. The bottom frame is placed on the subgrade box. The top frame is located between the top support bracket and the bottom frame. The upper end of the cutting box passes through the bottom frame and the top frame. The lifting cylinder is located on the bottom frame. between the top shelf. Four lifting cylinders are symmetrically distributed on opposite sides of the cutting box.

C. Lift the cutting box. (1) The vibrating hammer opens the vibrating cutting box. The vibration time is 1-3 minutes. (2) The lifting cylinder lifts the cutting box. The lifting cylinder lifts the top frame and resists it. On the top support bracket, the lifting cylinder then lifts up the cutting box through the top frame and the top support bracket (the vibrating hammer stops vibrating when the lifting cylinder lifts the cutting box).

In the construction method of this embodiment, in step A, a high-pressure rotary jet pile machine is first used to spray mud mixed with bentonite on the soil around the cutting box, so that the cutting box and the soil around the cutting box are initially separated, thereby effectively It can effectively reduce the pulling-out resistance of the trapped cutting box; in this way, under the same jacking force, the pulling-out ability of the cutting box of the TRD construction method pile machine can be effectively improved, and the trapped TRD construction method pile can be lifted out. The cutting box of the machine is pulled up; then, the vibration of the vibrating hammer further reduces the pulling resistance of the trapped cutting box, and then the cutting box is lifted by the jacking cylinder, thereby effectively reducing the trapped cutting box. The cutting box of the trapped TRD pile driver was pulled up due to the pulling resistance.

Specifically, as shown in Figures 2 and 3, the lifting device 1 also includes vertically distributed telescopic columns 1.4, the lower end of the telescopic column is connected to the bottom frame, and the upper end of the telescopic column is connected to the top frame. The lower end of the jacking cylinder is supported on the bottom frame. The top support bracket 2 is a cross beam distributed in a cross shape. The vibrating hammer is a high-frequency vibrating hammer, which is fixedly installed on the top support bracket through bolts.

Further, step A also includes replacing the mud liquid and injecting mud liquid into the infusion channel inside the cutting box to dilute or empty the cement and soil slurry inside and around the cutting box to prevent the cement slurry from solidifying into one with the cutting box. In this way, before the cutting box is pulled out, the pulling resistance of the trapped cutting box can be further reduced, thereby improving the pulling out ability of the cutting box of the TRD pile driver.

The mud liquid is a mud liquid mixed with a bentonite content of not less than 5%. Bentonite slurry has the function of lubricating the contact interface between the cutting box and the soil, which is beneficial to clearing out the cement and soil slurry inside and around the cutting box, preventing the cement slurry and the cutting box from solidifying into one.

Further, in step (2), the maximum lifting force exerted by the lifting cylinder on the cutting box through the top frame and the top support bracket is N tons, and the value of N is 560 tons.

(2) In the step (2), when the lifting force exerted by the jacking cylinder on the cutting box through the top frame and jacking bracket reaches N tons, the jacking cylinder maintains the lifting force of N tons for t minutes, and the value of t is 5-15 minutes; if the lifting cylinder does not lift the cutting box during this period, return to step (1) until the lifting cylinder lifts the cutting box. In this way, the vibration of step (1) and the jacking cycle of step (2) are combined, on the one hand, it is beneficial to pull out the cutting box of the trapped TRD pile driver, and on the other hand, it avoids excessive jacking force in the long term. applied to the cutting box, causing the connecting bolts of the cutting box to break.

Specific Embodiment 2. The remaining construction methods of this embodiment refer to Specific Embodiment 1. The difference is that,

Step A1 is also included between step A and step B.

The specific construction of step A1 is as follows, as shown in Figure 4 and Figure 5. A wire rope laying device is used to lay the wire rope underground. The wire rope laying device includes a steel wire rope 6.3, a limit steel pipe 6.2 and two guide steel pipes 6.1. The lower end of the limit steel pipe is equipped with an open-facing wire rope limit groove. The wire rope passes through the two guide steel pipes in turn. Both ends of the steel wire rope are equipped with lifting rings. . The specific steps for laying wire rope underground using a wire rope laying device include:

First, stand the limiting steel pipe and the two guide steel pipes vertically. The two guide steel pipes are distributed on the front and rear sides of the cutting box. The limiting steel pipes are distributed on the left or right side of the cutting box. The wire rope is passed through through the wire rope limiting groove; in this embodiment, there are also two limiting steel pipes, one of which is close to the front side of the cutting box, and the other limiting steel pipe is close to the rear side of the cutting box.

Second, insert the two guide steel pipes and the limit steel pipe downward into the soil layer until the lower ends of the two guide steel pipes and the limit steel pipe are located at the set distance below the cutting box of the TRD pile driver; this process The middle steel wire rope always passes through the two guide steel pipes, the steel wire rope passes through the steel wire rope limit groove, and both ends of the steel wire rope are above the ground surface;

Then, pull up both ends of the steel wire rope located above the ground until the entire steel wire rope is in a straight state; then pull the limiting steel pipe upward to separate the steel wire rope from the steel wire rope limiting groove;

Then, continue to pull up both ends of the steel wire rope above the ground until the entire steel wire rope is in a straightened state. At this time, the steel wire rope between the lower ends of the two guide steel pipes will be located under the cutting box of the TRD pile driver.

In this embodiment, the guide steel pipes and the limiting steel pipes are distributed in the groundwater soil continuous wall formed by the pile driver construction of the TRD construction method, and the construction steps of using the wire rope laying device to lay the wire rope underground are completed before the groundwater soil continuous wall is solidified. . Since the groundwater soil continuous wall is formed by mixing cement and soil, the groundwater soil continuous wall is relatively soft before solidification, and the soil around the cutting box is sprayed with mud mixed with bentonite through a high-pressure rotary jet pile machine, thereby making the guide steel pipe and limiter Steel pipes and wire ropes can be laid in place.

(2) The step also includes the crane and the wire rope lifting and cutting the box, and the crane and the wire rope lifting and cutting the box and the jacking cylinder lifting the cutting box simultaneously. The specific steps of lifting up and pulling out the cutting box by a crane and a steel wire rope include hanging the lifting rings at both ends of the steel wire rope on the hooks of the crane, and the crane lifts up the lower end of the cutting box through the steel wire rope.

In the working condition where the cutting box is buried, the clamping force of the buried drill may be too large, exceeding the maximum tensile force that the bolts used to connect two adjacent cutting box units in the cutting box can withstand, resulting in the The bolts connecting two cutting box units are broken, causing part or most of the cutting box to be unable to be pulled out, resulting in huge economic losses to the construction project and equipment. The pulling method of this embodiment is to solve this problem. Specifically,

In step A1 of this embodiment, a wire rope laying device is used to lay the wire rope underground, and the wire rope is used to bypass the bottom of the cutting box. In this way, when the crane lifts up the lower end of the cutting box through the wire rope, the cutting box The bolts used to connect two adjacent cutting box units are not stressed, so the pulling force of the crane on the cutting box body through the wire rope will not damage the bolts used to connect the two adjacent cutting box units. Bolts; in this way, using the jacking cylinder to lift the cutting box can greatly improve the lifting efficiency of the cutting box without damaging the bolts on the cutting box used to connect two adjacent cutting box units. Pull force to "salvage" the cutting box.

The above are only preferred embodiments of the present invention and do not limit the present invention in any way. Any simple modifications, changes and equivalent transformations made to the above embodiments based on the technical essence of the present invention still belong to the technical solution of the present invention. scope of protection.

Claims (9)

1. A construction method for pulling out the trapped cutting box of the TRD construction method. The construction method is characterized in that the construction method uses a top support bracket and a lifting device. The lifting device includes a bottom frame, a top frame and a top frame located between the bottom frame and the bottom frame. The construction method of lifting the cylinder between the top frames and pulling out the trapped cutting box of the TRD construction method includes the following steps in sequence: A. Preliminarily separate the soil around the cutting box. Use a high-pressure jet spray pile machine to spray mud mixed with bentonite from bottom to top on the soil around the cutting box to initially separate the cutting box and the soil around the cutting box. ; The specific construction of step A1 is as follows. A wire rope laying device is used to lay the wire rope underground. The wire rope laying device includes a steel wire rope, a limit steel pipe and two guide steel pipes. The lower end of the limit steel pipe is equipped with a wire rope limit groove, and the steel wire rope passes through the two steel pipes in sequence. A guide steel pipe is provided with lifting rings at both ends of the wire rope; the specific steps of using a wire rope laying device to lay the wire rope underground include: First, stand the limiting steel pipe and the two guide steel pipes vertically. The two guide steel pipes are distributed on the front and rear sides of the cutting box. The limiting steel pipes are distributed on the left or right side of the cutting box. The wire rope is passed through Pass through the wire rope limit groove; Second, insert the two guide steel pipes and the limit steel pipe downward into the soil layer until the lower ends of the two guide steel pipes and the limit steel pipe are located at the set distance below the cutting box of the TRD pile driver; this process The middle steel wire rope always passes through the two guide steel pipes, the steel wire rope passes through the steel wire rope limit groove, and both ends of the steel wire rope are above the ground surface; Then, pull up both ends of the steel wire rope located above the ground until the entire steel wire rope is in a straight state; then pull the limiting steel pipe upward to separate the steel wire rope from the steel wire rope limiting groove; Then, continue to pull up both ends of the steel wire rope located above the ground until the entire steel wire rope is in a straight state. At this time, the steel wire rope between the lower ends of the two guide steel pipes will be located under the cutting box of the TRD pile driver; B. Install the top support bracket and fix the top support bracket to the top of the cutting box through bolts; Install the vibrating hammer and fix the vibrating hammer on the top support bracket; Install the lifting device, lay the subgrade box on the surface, place the bottom frame on the subgrade box, and the top frame is located between the top support bracket and the bottom frame. The upper end of the cutting box passes through the bottom frame and the top frame, and the lifting cylinder is located between the bottom frame and the bottom frame. between top shelves; C. Lift the cutting box, (1) vibrating hammer opens the vibrating cutting box; (2) The lifting cylinder lifts the cutting box. The lifting cylinder lifts the top frame and presses it against the top support bracket. Then the lifting cylinder lifts the cutting box through the top frame and top support bracket; The crane and the wire rope lift and cut the box, and the crane and the wire rope lift and cut the box and the jacking cylinder lifts and cuts the box simultaneously. The specific steps of the crane and the wire rope for lifting and cutting the box include hanging the rings at both ends of the wire rope on the crane. On the hook, the crane lifts up the lower end of the cutting box through the wire rope. 2. A construction method for pulling out the trapped cutting box of the TRD construction method pile driver according to claim 1, characterized in that, in step (2), the lifting cylinder is applied to the cutting box through the top frame and the top support bracket. The maximum lifting force on the body is N tons. 3. A construction method for pulling out a trapped cutting box of a TRD construction method pile driver according to claim 2, characterized in that, in step (2), when the lifting cylinder is applied to the cutting box through the top frame and the top support bracket After the lifting force on the box reaches N tons, the lifting cylinder maintains the lifting force of N tons for t minutes. If the lifting cylinder does not lift the cutting box during this period, return to step (1) until the lifting cylinder will cut. The box is jacked up. 4. A construction method for pulling out the TRD construction method pile driver trapped in the cutting box according to claim 1 or 2 or 3, characterized in that step A also includes, mud liquid replacement, infusion channel inside the cutting box Inject mud liquid into the cutting box to dilute or empty the cement and soil slurry inside and around the cutting box to prevent the cement slurry and the cutting box from solidifying into one. 5. A construction method for pulling out a trapped cutting box of a TRD construction method pile driver according to claim 4, characterized in that the mud liquid is a mud liquid mixed with a bentonite content of not less than 5%. 6. A construction method for pulling out a TRD construction method pile machine trapped in a cutting box according to claim 1 or 2 or 3, characterized in that there are at least two lifting cylinders, and the lifting cylinders are distributed in Cut opposite sides of the box. 7. A construction method for pulling out a TRD construction method pile driver trapped in a cutting box according to claim 1 or 2 or 3, characterized in that the pulling out device also includes vertically distributed telescopic columns, and the telescopic columns The lower end of the telescopic column is connected to the bottom frame, and the upper end of the telescopic column is connected to the top frame. 8. A construction method for pulling out a trapped cutting box of a TRD construction method pile driver according to claim 1 or 2 or 3, characterized in that the top support bracket is a cross beam distributed in a cross. 9. A construction method for pulling out a TRD construction method pile driver trapped in a cutting box according to claim 1 or 2 or 3, characterized in that the vibrating hammer is a high-frequency vibrating hammer, and the vibrating hammer is fixed and installed by bolts On the top support bracket.