Intelligent operation method for cement-soil mixing pile

Abstract

The invention relates to an intelligent operation method for a cement-soil mixing pile. The intelligent operation method comprises the steps that firstly, the depth of a bearing stratum of a construction site is determined through a static sounding method, the accurate construction pile length is finally given according to the determined top face elevation and bottom face elevation of the bearing stratum, wherein the depth of the mixing pile entering the bearing stratum is 0.5-1.0 m; then depth control parameters of a mixing pile machine drilling bit entering the bearing stratum are determined; and finally, a confirmed current value and tension value entering the bearing stratum and a tension and current limit value exceeding a rated current serve as automatic control construction pile length parameters and are input into an intelligent control program, and intelligent drilling construction of the cement-soil mixing pile is carried out. Bidirectional mixing, intelligent operation, remote monitoring and management technologies are mainly applied to cement-soil mixing pile construction, so that the construction quality is greatly improved, and the construction cost is reduced. On-site construction control parameters are monitored in real time, and violation operation and special conditions can be remotely controlled.

Description

technical field [0001] The invention relates to a soft foundation treatment technology, in particular to an intelligent operation method of a cement-soil mixing pile. Background technique [0002] Soft soil foundations are often distributed along my country's coasts and river basins. Under the dynamic effects of loads, cycles, and vehicles, foundation settlement is the main form of foundation failure, which often leads to quality problems in highways, railways, airports, and docks. Among the various methods for dealing with soft soil foundations, the most widely used method is to use composite foundations. In the reinforcement methods of composite foundations, especially in the treatment of soft soil foundations in traffic engineering, the cement-soil mixing pile technology is often used. Strengthen the foundation. Engineering practice shows that the cement-soil mixing pile method has the advantages of simple construction, rapid construction, and small disturbance, and can ...

AI Technical Summary

Problems solved by technology

[0004] 1. The construction technology is not advanced, and there are the following problems:

[0005] a. The mixing is uneven, the reinforcement material and the soil to be reinforced are not completely mixed, and the effect of the reinforcement material is not fully exerted, which has a serious impact on the quality of the cement-soil mixing pile;

[0006] b. Waste of materials

Due to uneven mixing, only increase the amount of reinforcing material in the design, generally increase the amount by 20%-30%, and the project cost will increase;

[0007] c. Due to the backward technology, during the construction process, under the action of pressure, the reinforcing material will rise to the ground along the drill pipe, resulting in material waste, generally 5%-10%;

[0008] d. The reinforcement material is unevenly distributed along the depth direction of the pile body, which usually shows that there is more reinforcement material in the upper part of the pile body and less reinforcement material in the lower part of the pile body, that is, the quality of the upper part of the pile body is obviously better than that of the lower part, which is easy to cause the later settlement of the treated foundation Too much, can not meet the design requirements, resulting in quality hazards;

[0009] e. The length of the construction pile is limited, which limits the application range and promotion of the cement-soil mixing pile;

[0010] f. Outdated technology and low construction efficiency;

[0011] 2. The degree of intelligence is not enough, and there are the following problems:

[0012] a. There are many human factors, and the phenomenon of cutting corners and materials is serious. The length of piles is often insufficient and reinforcement materials are used less, resulting in serious quality hazards;

[0013] b. When the geological conditions are complex, the length of the construction pile cannot be automatically judged. If the pile length does not reach the actual bearing layer, it will bring quality problems, and if it enters the actual bearing layer too much, it will cause equipment damage;

[0014] c. Manual operation, serious pollution, and waste of materials, generally 1.5%-2.5%;

[0015] d. Manual operation can easily cause uneven distribution of reinforcement materials in the pile body, and even pile breakage, resulting in quality hazards;

[0016] e. Manual operation, the ingredients are not accurate, and the design intention cannot be accurately realized;

[0017] f. Due to the manual operation, the labor intensity is high, the labor is large, and the construction cost is relatively high;

[0018] 3. The supervision and information processing measures are not in place, and the following problems exist:

[0019] a. Consume a large number of personnel to stand by the site, increasing the project cost;

[0020] b. It is impossible to monitor the construction parameters of construction equipment in real time;

[0021] c. The construction process cannot be traced;

[0022] d. Construction statistics are not timely, consuming a large number of personnel;

[0023] e. Unable to control and manage on-site violations in a timely manner;

[0024] In summary, due to problems in technology, intelligent control, remote monitoring and management, it has a serious impact on the construction quality, restricting the promotion and use of cement-soil mixing pile technology; at the same time, it also limits the application of cement-soil mixing pile Application range

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