阅读说明：本技术 硬地层连续钻进循环浇筑一体化打桩技术施工方法 (Continuous drilling and circulating pouring integrated piling technology construction method for hard formation ) 是由 田家林 唐磊 李岩 邢春雨 于 2020-11-26 设计创作，主要内容包括：本发明属于土木工程技术领域,具体涉及硬地层连续钻进循环浇筑一体化打桩技术施工方法。采用的技术方案为：硬地层连续钻进循环浇筑一体化打桩技术施工方法,所述硬地层连续钻进循环浇筑一体化打桩技术施工方法包括步骤：平整场地、桩孔位置点地质测量、安装一体化打桩工具、钻进循环浇筑具体施工、钢筋笼安装；所述安装一体化打桩工具包括计算所需循环装置个数,组装一体化打桩工具串；所述钻进循环浇筑具体施工包括姿态调整、钻进和同步排屑、残屑清除、混凝土浇筑规则；所述钢筋笼安装包括安装方法及顺序。本发明提供了一种全新的硬地层连续钻进循环浇筑一体化打桩技术施工方法,提升打桩钻进、循环排屑和连续浇筑的效率。(The invention belongs to the technical field of civil engineering, and particularly relates to a construction method of a continuous drilling and circulating pouring integrated piling technology for a hard stratum. The technical scheme is as follows: the construction method of the continuous drilling and circulating pouring integrated piling technology for the hard stratum comprises the following steps: leveling a field, carrying out geological measurement on a pile hole position point, installing an integrated piling tool, carrying out drilling circulating pouring concrete construction, and installing a reinforcement cage; the integrated piling tool is installed by calculating the number of the required circulating devices and assembling an integrated piling tool string; the drilling circulating pouring concrete construction comprises posture adjustment, drilling, synchronous chip removal, residual chip removal and concrete pouring rules; the installation of the reinforcement cage comprises an installation method and an installation sequence. The invention provides a brand-new construction method of a continuous drilling and circulating pouring integrated piling technology for a hard stratum, and the construction method can improve the efficiencies of piling drilling, circulating chip removal and continuous pouring.)

1. The continuous drilling and circulating pouring integrated piling technology construction method for the hard formation is characterized by comprising the following steps of: the construction method of the continuous drilling and circulating pouring integrated piling technology for the hard formation comprises the following steps:

(1) leveling the field;

(2) carrying out geological measurement on a pile hole position point;

(3) installing an integrated piling tool;

(4) drilling, circulating and pouring concrete construction;

(5) installing a reinforcement cage;

in the step (1), the construction area is leveled, and the requirement on the ground levelness when the special piling equipment works normally is met; planning professional equipment parking position, construction warning marks the construction, fire control passageway construction.

2. The construction method of the continuous drilling and circulating pouring integrated piling technology for the hard formation according to claim 1, is characterized in that: in the step (3), the number n of the needed circulating devices is calculated to be more than or equal to H/L, the n circulating devices are sequentially connected end to form a circulating device string, and then the upper end and the lower end of the circulating device string are respectively connected with a coupler and the circulating device to form an integrated piling tool; and then the integrated piling tool and the piling equipment are effectively installed.

3. The construction method of the continuous drilling and circulating pouring integrated piling technology for the hard formation according to claim 1, is characterized in that: in the step (4), the integrated piling tool is adjusted to be vertical to a horizontal plane; when the integrated piling tool drills, the rock debris is continuously discharged through the circulating device; when the drilling reaches the bearing stratum, stopping drilling; checking the verticality of the pile hole, checking the thickness h of the residual rock debris at the bottom of the pile hole, and performing subsequent construction according to the following rules:

(1) when the perpendicularity of the pile hole meets the pile hole standard:

(a) when the thickness h of the rock debris is larger than or equal to 10cm, starting a bottom cleaning mechanism of the integrated piling tool to perform bottom cleaning operation; after the bottom cleaning operation of the well bottom is finished, the integrated piling tool string is properly lifted, and the drilling tooth distance from the well bottom is high H₁Beginning to pour concrete, and the concrete pouring height h₁，H₁And h₁Satisfies the relation H₁≥h₁；

(b) When the thickness h of the rock debris is less than 10cm, an integrated piling tool is used for pouring concrete;

(2) when the perpendicularity of the pile hole cannot meet the pile hole standard, correcting the pile hole or re-drilling the pile hole in the step (2), measuring the pile driving position by using special equipment for measuring geology, and estimating the pile driving depth; and (4) evaluating geological trails and selecting the adaptive drilling teeth.

4. The construction method of the continuous drilling and circulating pouring integrated piling technology for the hard formation according to claim 1, is characterized in that: in the step (5), the reinforcement cage is pressed into the concrete through matched equipment; the vibration device is attached to the reinforcement cage, the reinforcement cage falls to the bottom of the pile hole, and the vibration device gradually begins to rise to the ground.

5. The construction method of the continuous drilling and circulating pouring integrated piling technology for the hard formation according to claim 1, is characterized in that: in the geological measurement of the pile hole position point in the step (2), a special device is used for measuring the pile driving position, and the pile driving depth H is estimated; and evaluating the geological condition of the pile driving point, and selecting the adaptive drilling teeth.

Technical Field

The invention belongs to the technical field of civil engineering, and particularly relates to a construction method of a continuous drilling and circulating pouring integrated piling technology for a hard stratum.

Background

In the civil engineering construction process, a structured view and an industrialized mode are adopted, high-efficiency and low-price engineering construction is implemented on a large-scale and serialized level, and the conditions of non-conformity and delay with the field conditions may occur in different piling technology construction methods due to the complexity of geological structures in different areas, so that the drilling, rock debris removal and pouring efficiencies are low. There are mainly the following problems: (1) the three processes of stopping drilling, lifting the drilling barrel and dumping rock debris are sequentially carried out in the chip removal circulation, and when a deep pile well is operated, the processes of lifting the drilling barrel and dumping the rock debris occupy more time, and the drilling and chip removal circulation modes are alternately carried out in the drilling and chip removal processes. (2) And in the pouring process, the piling equipment is lifted after piling is finished, and other special pouring tools are replaced to continuously pour concrete. Causing the 'discontinuity' phenomena of drilling construction, chip removal circulation and pouring operation in the hard layer. After the 'intermittent' drilling, more time, money, material and manpower are needed.

Therefore, how to realize the construction method of efficient drilling, synchronous circulating chip removal and continuous concrete pouring is a construction technical problem which is eagerly solved in the field.

Disclosure of Invention

The invention aims to overcome the existing defects and provides a construction method of a continuous drilling and circulating pouring integrated piling technology for a hard stratum.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: the continuous drilling and circulating pouring integrated piling technology construction method for the hard formation is characterized by comprising the following steps of: the construction method of the continuous drilling and circulating pouring integrated piling technology for the hard formation comprises the following steps:

(1) leveling the field;

(2) carrying out geological measurement on a pile hole position point;

(3) installing an integrated piling tool;

(4) drilling, circulating and pouring concrete construction;

(5) installing a reinforcement cage;

in the step (1), the site leveling comprises a leveling construction area, and the requirement on the ground levelness when the special piling equipment works normally is met; planning professional equipment parking position, construction warning marks the construction, fire control passageway construction.

Preferably, in the step (3), in the installation of the integrated piling tool, the estimated piling depth H and the virtual effective length L of the circulating device are obtained according to the step (2), the number n of the required circulating devices is calculated to be more than or equal to H/L, the n circulating devices are sequentially connected end to form a circulating device string, and then the upper end and the lower end of the circulating device string are respectively connected with the coupler and the circulating device to form the integrated piling tool; and then the integrated piling tool and the piling equipment are effectively installed.

Preferably, in the drilling circulating pouring concrete construction in the step (4), after the integrated piling tool is installed completely, the integrated piling tool is adjusted to be vertical to a horizontal plane; when the integrated piling tool drills, the rock debris is continuously discharged through the circulating device; when the drilling reaches the bearing stratum, stopping the drilling; checking the verticality of the pile hole, checking the thickness h of the residual rock debris at the bottom of the pile hole, and performing subsequent construction according to the following rules:

(1) when the perpendicularity of the pile hole meets the pile hole standard:

(a) the thickness h of the scraps is more than or equal to 10cm, a bottom cleaning mechanism of the integrated piling tool is started, and bottom cleaning operation is carried out; after the bottom cleaning operation of the well bottom is finished, the integrated piling tool string is properly lifted, and the drilling tooth distance from the well bottom is high H₁Beginning to pour concrete, and the concrete pouring height h₁，H₁And h₁Satisfies the relation H₁≥h₁；

(b) When the thickness h of the rock debris is less than 10cm, an integrated piling tool is used for pouring concrete;

(2) and when the perpendicularity of the pile hole cannot meet the pile hole standard, correcting the pile hole or driving the pile hole again.

Preferably, in the step (5), the reinforcement cage is pressed into the concrete through matched equipment; the vibration device is attached to the reinforcement cage, the reinforcement cage falls to the bottom of the pile hole, and the vibration device gradually begins to rise to the ground.

Preferably, in the geological measurement of the pile hole position point in the step (2), a special device is used for measuring the pile driving position, and the pile driving depth H is estimated; and evaluating the geological condition of the pile driving point, and selecting the adaptive drilling teeth.

Compared with the prior art, the invention has the following beneficial effects: the invention provides a construction method of a continuous drilling and circulating pouring integrated piling technology for a hard stratum; the construction method of continuous drilling and synchronous chip removal improves the drilling efficiency of piling; the residual rock debris can be removed by a bottom cleaning mechanism without other special tools; the concrete is efficiently poured by utilizing the integrated piling tool, and equipment does not need to be replaced; after the concrete is poured, the reinforcement cage is put down, the construction method simplifies and standardizes the construction flow, the piling is efficient, the circulation is reliable, and the operation is simple.

Drawings

FIG. 1 is a schematic view of an integrated piling operation;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic diagram of the integrated piling construction under another condition;

wherein: 1-power shaft, 2-coupler, 3-concrete connector, 4-circulating device, 5-drill bit component, 6-bottom cleaning mechanism, 7-ground, 8-soft layer, 9-bearing layer, H-piling depth and L-circulating device effective length.

Detailed Description

Example 1, as shown in fig. 1, the construction method of the continuous drilling, circulating pouring and integrated piling technology for the hard formation; the construction area is leveled, and the requirement on the ground levelness when the special piling equipment works normally is met; planning professional equipment parking position, construction warning marks the construction, fire control passageway construction. Measuring the piling position by using special equipment for measuring geology, and estimating the piling depth H; and (4) evaluating geological trails and selecting the adaptive drilling teeth. And (3) calculating the number n of the required circulating devices to be more than or equal to H/L, determining that n is 1, and effectively installing the assembled integrated piling tool and piling equipment. Adjusting the integrated piling tool to be vertical to a horizontal plane; the integrated piling tool starts drilling operation, and rock debris is continuously discharged through the circulating device while drilling; when the drilling reaches the bearing stratum, stopping the drilling; checking the verticality of the pile hole, checking the thickness h of the residual rock debris at the bottom of the pile hole, and performing subsequent construction according to the following rules:

(1) when the perpendicularity of the pile hole meets the pile hole standard:

(b) when the thickness h of the rock debris is larger than or equal to 10cm, starting a bottom cleaning mechanism of the integrated piling tool to perform bottom cleaning operation; after the bottom cleaning operation of the well bottom is finished, the integrated piling tool string is properly lifted, and the drilling tooth distance from the well bottom is high H₁Starting to pour concrete₁，H₁And h₁Satisfies the relation H₁≥h₁And the concrete flows through the internal channel of the integrated piling tool and finally flows to the bottom of the well.

(b) When the thickness h of the rock debris is less than 10cm, an integrated piling tool is used for pouring concrete;

(2) and when the perpendicularity of the pile hole cannot meet the pile hole standard, correcting the pile hole or driving the pile hole again.

After the concrete pouring is finished, the reinforcement cage is pressed into the concrete through matched equipment; and the steel reinforcement cage is additionally provided with a vibration device, the steel reinforcement cage falls to the bottom of the pile hole, the vibration device gradually begins to rise to the ground, the pile forming quality is detected again after the concrete is solidified, and the whole pile foundation construction operation is completed.

Example 2, as shown in fig. 3, in another embodiment, the pile hole depth H is increased, and the number n of required circulation devices is calculated to be 2 according to n ≧ H/L.

In both of the two embodiments, a construction method of a hard formation continuous drilling and circulating pouring integrated piling technology is adopted, and a person skilled in the art can select the value n according to actual conditions.

Under the above one implementation mode, the synchronous operation of drilling and chip removal is realized; detecting the quality of the pile hole, and judging whether bottom cleaning operation is needed or not; after bottom cleaning operation at the bottom of the well is finished; pouring concrete; and (5) installing a reinforcement cage. And the continuous drilling, synchronous chip removal and concrete pouring are realized without replacing pouring equipment.

The invention provides a construction method of a continuous drilling and circulating pouring integrated piling technology for a hard stratum, which provides a brand-new construction method of efficient drilling, synchronous chip removal and continuous pouring under an implementation mode; the construction method of continuous drilling and synchronous chip removal improves the drilling efficiency of piling; the residual rock debris can be removed by a bottom cleaning mechanism without other special tools; the concrete is efficiently poured by utilizing the integrated piling tool, and equipment does not need to be replaced; after the concrete is poured, the reinforcement cage is placed, the construction method simplifies and standardizes the construction process, the piling is efficient, the circulation is reliable, and the operation is simple.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.