CN-115704211-B - Method for controlling construction verticality of vibroflotation gravel pile machine

CN115704211BCN 115704211 BCN115704211 BCN 115704211BCN-115704211-B

Abstract

The invention discloses a method for controlling construction verticality of a vibroflotation gravel pile machine, which comprises the steps of arranging a drill rod system in parallel with a mast of a hoisting system so that a vibroflotation device system connected with the bottom of the drill rod system is parallel with the mast, detecting the verticality of the mast relative to a host on a horizontal plane in real time when the vibroflotation device system is used for vibroflotation construction to obtain deviation data of the verticality of the mast, judging whether the verticality of the mast needs to be regulated according to the obtained real-time deviation data of the verticality of the mast, and regulating the verticality of the mast if the verticality of the mast needs to be regulated, so that the vibroflotation device system can shake-down a construction stratum with the required verticality and form vibroflotation gravel pile holes. According to the method, the vibroflotator system can vibroflotate to form the vibroflotation gravel pile hole with the perpendicularity meeting the requirement, so that the uniformity and the compactness of the pile diameter of the formed vibroflotation gravel pile are ensured, the safety of the vibroflotation gravel pile is improved, the construction period is effectively shortened, and the construction cost is reduced.

Inventors

SUN LIANG
Tang Wenlu
ZHANG JIAJUN
DING HAILONG
MOU YU
ZHOU JIANHUA
SHI FENG
Xing Shulong
ZHAO JUN
TANG YONGJUN
CAO JIE
HAN WEI
XIAO ENSHANG
XU FANGCAI

Assignees

中国水电基础局有限公司

Dates

Publication Date: 20260508
Application Date: 20210811

Claims (6)

1. The utility model provides a method of control of vibroflotation gravel pile machine construction straightness, vibroflotation gravel pile machine includes hoist and mount system, telescopic guide arm's drilling rod system and vibroflotation ware system, its characterized in that, the method includes: The method comprises the steps of arranging a drill rod system and a mast of a hoisting system in parallel, enabling a vibroflotation system connected with the bottom of the drill rod system to be always parallel to the mast by applying a horizontal constraint force and a vertical guide force to a connecting section of the drill rod system, wherein the application of the horizontal constraint force and the vertical guide force to the connecting section of the drill rod system comprises the steps of installing a fixing frame connected with a support frame on the mast, enabling the connecting section of the drill rod system to pass through a through hole of the support frame, enabling the vibroflotation system connected with the bottom of the drill rod system to be parallel to the mast by applying the horizontal constraint force and the vertical guide force to the connecting section through the support frame, installing an adjusting oil cylinder on the mast, enabling a piston rod of the adjusting oil cylinder to be parallel to the mast and extend downwards and vertically, enabling the tail end of the adjusting oil cylinder to be fixedly connected with the fixing frame, and enabling the vertical connecting frame of the fixing frame to be connected with the mast in a sliding fit mode, and adjusting the position of the fixing frame on the mast by adjusting the extension of the oil cylinder so as to adjust the constraint position of the support frame on the connecting section of the drill rod system; When the vibroflotation is performed through a vibroflotation system which is always parallel to the mast, the verticality of the mast relative to a host on a horizontal plane is detected in real time through an inclination angle detection module which is arranged in the mast and is close to the 1/5 position of the lower end, so that real-time deviation data of the verticality of the mast are obtained; Judging whether the perpendicularity of the mast needs to be adjusted according to the obtained real-time deviation data of the perpendicularity of the mast; if the perpendicularity of the mast is required to be adjusted, the vibroflotation system stops vibroflotation construction, the vibroflotation system is lifted on the hoisting system, and then the perpendicularity of the mast is adjusted, so that the vibroflotation system can vibroflotate the construction stratum downwards with the perpendicularity meeting the requirement, and a vibroflotation broken stone pile hole is formed.
2. The method of claim 1, wherein detecting in real time the perpendicularity of the mast relative to a host mounted on a horizontal surface to obtain deviation data of the perpendicularity of the mast comprises: the inclination angle of the mast relative to the host is obtained by detecting the inclination angle of the mast relative to the host arranged on the horizontal plane in real time; after obtaining the inclination angle of the mast relative to the host, subtracting 90 degrees from the angle to obtain the deviation value of the perpendicularity of the mast relative to the host.
3. The method of claim 1, wherein detecting in real time the perpendicularity of the mast relative to a host mounted on a horizontal surface to obtain deviation data of the perpendicularity of the mast comprises: the inclination angle of the mast relative to the host is obtained by detecting the inclination angle of the mast relative to the host arranged on the horizontal plane in real time; And obtaining the inclination angle of the mast relative to the host, subtracting 90 degrees from the angle, and taking an absolute value to obtain the absolute value of the perpendicularity deviation value of the mast relative to the host.
4. The method of claim 1, wherein determining whether adjustment of mast perpendicularity is required based on the obtained real-time deviation data of mast perpendicularity comprises: after acquiring real-time deviation data of the perpendicularity of the mast, judging whether the deviation data is in a preset threshold value interval or not; If the deviation data exceeds a preset threshold interval, the perpendicularity of the mast is required to be adjusted; if the deviation data does not exceed the preset threshold interval, the mast perpendicularity does not need to be adjusted.
5. The method of claim 4, wherein adjusting the mast verticality if it is desired to adjust the mast verticality comprises: When the perpendicularity of the mast is required to be adjusted, the vibroflotation system stops vibroflotation construction and lifts the vibroflotation system on the lifting system; After the vibroflotation device system is lifted, corresponding actions are executed by controlling the mast angle adjusting mechanism so as to adjust the perpendicularity of the mast to meet the requirements.
6. The method of claim 5, wherein controlling the mast angle adjustment mechanism to perform a corresponding action to adjust the mast perpendicularity to a desired level comprises: The opening of the proportional valve used for correcting is controlled to control the correction oil cylinder connected with the proportional valve to execute corresponding actions; the mast connected with the deviation correcting oil cylinder is driven to deflect relative to the host machine through the action of the deviation correcting oil cylinder, so that the perpendicularity of the mast meets the requirement.

Description

Method for controlling construction verticality of vibroflotation gravel pile machine Technical Field The invention relates to the technical field of pile machine construction, in particular to a method for controlling construction verticality of an vibroflotation gravel pile machine. Background In the traditional vibroflotation engineering, the vibroflotation device is usually hung by a hoisting device, the vibroflotation device is penetrated into the design depth to perform construction, and the hoisting tonnage and the hoisting height of the hoisting device are determined according to the design depth. The common hoisting equipment comprises an automobile crane, a pile frame and a crawler crane. The traditional hoisting equipment is adopted for vibroflotation construction, and the upper part of a guide rod connected with the top of the vibroflotation device is connected with the hoisting equipment through a winch, so that the flexible connection is realized. When the vibroflotation device is in a suspension state, the vibroflotation device and the guide rod are in a vertical state under the action of gravity, and no constraint exists in the horizontal direction. In the vibroflotation process, the suspension state of the vibroflotation device is kept by the personal ability and responsibility center of an operator, the verticality is good when the vibroflotation device encounters a relatively soft layer, but the vibroflotation device is easy to deflect when the vibroflotation device encounters a relatively hard layer or larger gravel, at the moment, the vibroflotation device cannot keep suspension, the pile hole deflection is easy to occur when the vibroflotation is continued, and the engineering quality and the progress are seriously influenced. To solve this problem, in engineering practice, it is sometimes operated in two steps as follows: Firstly, the operator immediately lifts the vibroflotation device, then lightly beats and lifts, breaks through the hard layer or extrudes the gravel to the edge of the pile hole at a bit, so that the vibroflotation device continuously drills into the hole. The method is suitable for the situation that the hard layer is thin or the gravels are not very large, and can basically solve the problem of the conventional stratum within 20m relative to the uniform stratum. However, for the vibroflotation gravel pile of the complex stratum with the diameter of more than 50m, the method is often poor in effect at the junction part with soft upper part and hard lower part and large-particle-size gravel. When the bottom of the vibroflotator encounters hard formations, particularly large gravel, a "sideslip" phenomenon often occurs, which is one of the key causes of pile hole deflection. And the light deflection affects the work efficiency, and the heavy pile is abandoned, so that the quality and the progress are greatly affected. If in a certain project, a mode of forcefully breaking through the guide rod and the vibroflotation device Gao Jugao is adopted, the equipment is seriously damaged, and serious deflection occurs for a plurality of times. Secondly, if the method cannot work, the vibroflotation pile machine is removed, the rotary drilling machine is used for reaming, gravel or hard layers are dug out, or a percussion drill is used for impact operation, and vibroflotation hole forming operation is carried out after the hard layers are drilled or broken. However, this method increases the construction cost and affects the construction progress. In addition, in the prior art, when a deep soft foundation with the hole depth exceeding 50 meters is constructed, a multi-section telescopic guide rod connecting vibroflotation device method can be adopted for vibroflotation construction. Because the telescopic guide rod system adopts rigid connection, the guide rod and vibroflotation device system can still keep vertical when encountering softer stratum, thereby avoiding deflection of pile holes caused by sideslip of the vibroflotation device. However, when encountering hard layers, particularly larger gravels, the jounce device adopting the structure inevitably generates a sideslip phenomenon, so that pile holes are deflected. If the inclined pile hole is trimmed, the uniformity of the pile diameter and the guarantee coefficient of the compactness of the vibroflotation gravel pile are affected, so that the subsequently formed vibroflotation gravel pile is poor in safety, and if the inclined pile hole is trimmed, a vibroflotation device is required to stop vibroflotation construction and repair the hole in time, so that the construction period is prolonged, and the construction cost is increased. If the deflection is heavy, the whole pile can be abandoned, and the construction progress and cost are seriously affected. In summary, how to ensure perpendicularity of the vibroflotation device is an urgent problem to be solved when vibroflotation is performed on harder strata with hole