阅读说明：本技术 一种多头混凝土夯扩桩的制作方法 (Method for manufacturing multi-head concrete rammed pile ) 是由 张代源 于 2020-11-27 设计创作，主要内容包括：本发明公开了一种自上而下多夯扩头混凝土桩的制作方法,包括如下步骤：步骤一、确定扩夯位置；步骤二、打桩机就位；步骤三、下沉内外管至最上方夯扩位置；步骤四、拔内管；步骤五、灌注混凝土；步骤六、插内管；步骤七、外管上拔h；步骤八、夯击形成夯扩头；步骤九、下沉内外管至下一处夯扩头位置；步骤十、拔出内管；步骤十一、灌注混凝土；步骤十二、插入内管；步骤十三、外管上拔h；步骤十四、夯击形成夯扩头；骤十五、重复上述步骤形成所有夯扩头；骤十六、得到多头混凝土夯扩桩。本发明通过自上向下逐渐扩夯得到夯扩头,保证了每段夯扩头均能达到预设的外径,且通过先确定D和h值后,再确定H的值的方法保证了D值符合预设的建造要求。(The invention discloses a method for manufacturing a concrete pile with multiple rammed enlarged heads from top to bottom, which comprises the following steps: step one, determining a ramming position; secondly, positioning a pile driver; sinking the inner pipe and the outer pipe to the uppermost ramming position; step four, pulling out the inner pipe; step five, pouring concrete; step six, inserting an inner pipe; seventhly, drawing the outer tube upwards for h; step eight, tamping to form a tamping expanding head; step nine, sinking the inner pipe and the outer pipe to the next ramming head position; step ten, pulling out the inner pipe; step eleven, pouring concrete; step twelve, inserting an inner tube; thirteen, pulling the outer tube up h; fourteen, tamping to form a tamping expanding head; fifteen, repeating the steps to form all ramming expansion heads; sixthly, obtaining the multi-head concrete rammed pile. The invention obtains the ramming-expanding heads by ramming from top to bottom gradually, ensures that each section of ramming-expanding head can reach the preset outer diameter, and ensures that the D value meets the preset construction requirement by a method of determining the D value and the H value and then determining the H value.)

1. The method for manufacturing the multi-head concrete rammed pile is characterized by comprising the following steps of:

step one, sequentially determining the position of a ramming head (3) formed by ramming from top to bottom;

secondly, positioning a pile driver;

sinking the inner pipe (2) and the outer pipe (1) to the uppermost tamping and expanding position;

step four, pulling out the inner pipe;

step five, pouring concrete into the outer pipe

Step six, inserting an inner pipe,

seventhly, drawing the outer tube up by h;

step eight, tamping the concrete by using the inner pipe to form a tamping expanding head;

step nine, sinking the inner pipe (2) and the outer pipe (1) to the next ramming position;

step ten, pulling out the inner pipe;

step eleven, pouring concrete into the outer pipe;

step twelve, inserting an inner tube;

thirteen, drawing the outer tube to h height;

fourteen, forming a ramming head (3) by ramming an inner pipe;

fifteen, repeating the nine steps to the fourteen steps to form all the ramming-enlarging heads (3);

sixthly, the inner pipe (2) is pulled out, concrete is fully filled into the outer pipe, and then the outer pipe (1) is pulled out to obtain the multi-head concrete rammed pile.

2. The method for manufacturing the multi-head concrete rammed pile according to claim 1, wherein: in the sixteenth step, after the outer pipe (1) is pulled out, a tamping machine is used for tamping, and then the multi-head concrete rammed pile is obtained after concrete is solidified.

3. The method for manufacturing the multi-head concrete rammed pile according to claim 1, wherein: the inner diameter of the outer pipe (2) is D and the diameter of the tamping head (3) is D.

4. The method for manufacturing the multi-head concrete rammed pile according to claim 3, wherein:

D＝[1.5d,1.8d]。

5. the method for manufacturing the multi-head concrete rammed pile according to claim 3, wherein:

h＝[1.5d,2d]。

6. the method for manufacturing the multi-head concrete rammed pile according to any one of claims 3 to 5, wherein:

wherein beta is the diameter expansion uneven coefficient of soil texture difference, and is 1.05-1.15; h₁The concrete height of the outer pipe is shown when the ramming is performed to form the ramming head outside the bottommost ramming head.

7. The method for manufacturing the multi-head concrete rammed pile according to any one of claims 3 to 5, wherein:

wherein beta is the diameter expansion uneven coefficient of soil texture difference, and is 1.05-1.15; h₂The concrete height poured into the outer pipe when the bottommost ramming head is formed by ramming is shown.

Technical Field

The invention belongs to the field of civil construction, and particularly relates to a method for manufacturing a multi-head concrete rammed pile.

Background

The rammed pile is a pile type in which cast-in-place concrete at the pile end is enlarged into a large-head shape by ramming. The sectional area of the pile end is increased and the foundation soil is compacted, so that the bearing capacity of the pile is greatly improved. The construction equipment and the method are improved on the basis of hammering the cast-in-place pile of the immersed tube. A large number of engineering practices prove that the tamping-expanding pile construction has the advantages of reliable construction technology, scientific process, no slurry pollution, low engineering cost and the like.

And the multi-head rammed pile is characterized in that a plurality of rammed heads are formed by ramming on the basis of the multi-head rammed pile, so that the bearing capacity of the rammed pile is further ensured. And the diameter of the ramming head of the ramming pile should be consistent with that of the ramming head at the upper part and the lower part. However, in the actual manufacturing process, as shown in 201510415354.7 a construction method of a composite foundation of a granular material rammed pile, the bottom ramming head is rammed and then the upper ramming head is rammed and expanded upwards. However, when the tamping head at the upper part is tamped, the bottom of the tamping head is not compact foundation soil but flowing concrete, so that when the tamping force is transmitted laterally, the transmitted part is the side wall of the pile hole between the bottom tamping head and the expanded tamping head, and the tamping heads outside the bottom tamping head can not reach the preset expanded outer diameter actually. And the more upward along the rammed pile, the smaller the rammed head is, and the rammed head on the upper part can present the shape that upper portion is wide, the lower part is narrow, can not reach preset construction effect.

In addition, in the prior art, the value of D is determined after the H and H values of the concrete are determined, but the prior art has the defects that: in the construction process, the pipe pulling height h is often ignored, and h cannot reach the proper height. Thus, the height of the tamping head can not meet the design requirement due to the fact that the h value is too small, the thickness h is much smaller than the design value, and the diameter D is much larger than the design value, so that the preset pile expanding requirement is difficult to achieve.

Disclosure of Invention

In order to solve the problems, the invention discloses a method for manufacturing a multi-head concrete rammed pile. The invention obtains the ramming head by ramming from top to bottom gradually, ensures that each section of ramming head can reach the preset outer diameter, and determines H (H is H) after determining D and H values₁Or H₂) The method of (3) ensures that the value of D meets the preset construction requirements. Because the h value is set reasonably, the efficiency is improved, and the uniformity and the construction quality of expanding are ensured.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a method for manufacturing a multi-head concrete rammed pile comprises the following steps:

step one, sequentially determining the position of a ramming head 3 formed by ramming from top to bottom;

secondly, positioning a pile driver;

sinking the inner pipe 2 and the outer pipe 1 to the uppermost ramming position;

step four, pulling out the inner pipe;

step five, pouring concrete into the outer pipe

Step six, inserting an inner pipe,

seventhly, drawing the outer tube up by h;

step eight, tamping the concrete by using the inner pipe to form a tamping expanding head;

step nine, sinking the inner pipe 2 and the outer pipe 1 to the next position for tamping;

step ten, pulling out the inner pipe;

step eleven, pouring concrete into the outer pipe;

step twelve, inserting an inner tube;

thirteen, drawing the outer tube to h height;

fourteen, forming a ramming head 3 by ramming an inner pipe;

fifteen, repeating the ninth step to the fourteenth step to form all the ramming-enlarging heads 3;

sixthly, the inner pipe 2 is pulled out, the outer pipe is filled with concrete, and then the outer pipe 1 is pulled out to obtain the multi-head concrete rammed pile.

In the sixteenth step, after the outer pipe 1 is pulled out, a tamping machine is used for tamping, and then the multi-head concrete rammed pile is obtained after concrete is solidified.

In a further development, the outer tube 2 has an inner diameter D and the tamper head 3 has a diameter D.

In a further refinement, D ═ 1.5D,1.8D ].

In a further refinement, h ═ 1.5d,2d ].

The further improvement is that the device is provided with a plurality of grooves,

wherein beta is the diameter expansion uneven coefficient of soil texture difference, and is 1.05-1.15; h₁The concrete height of the outer pipe is shown when the ramming is performed to form the ramming head outside the bottommost ramming head.

The further improvement is that the device is provided with a plurality of grooves,

wherein beta is the diameter expansion uneven coefficient of soil texture difference, and is 1.05-1.15; h₂The concrete height poured into the outer pipe when the bottommost ramming head is formed by ramming is shown.

The invention has the advantages that:

the invention obtains the ramming head by ramming from top to bottom gradually, ensures that each section of ramming head can reach the preset outer diameter, and determines H (H is H) after determining D and H values₁Or H₂) The method of (3) ensures that the value of D meets the preset construction requirements. Because the h value is set reasonably, the efficiency is improved, and the uniformity and the construction quality of expanding are ensured.

Drawings

FIG. 1 is a schematic view of the flow structure of the present invention.

Detailed Description

The invention is further explained with reference to the drawings and the embodiments.

A method for manufacturing a multi-head concrete rammed pile comprises the following steps:

step one, sequentially determining the position of a ramming head 3 formed by ramming from top to bottom;

secondly, positioning a pile driver;

sinking the inner pipe 2 and the outer pipe 1 to the uppermost ramming position;

step four, pulling out the inner pipe;

step five, filling H into the outer tube₁Deep concrete

Step six, inserting an inner pipe,

seventhly, drawing the outer tube up by h;

step eight, tamping the concrete by using the inner pipe to form a tamping expanding head;

step nine, sinking the inner pipe 2 and the outer pipe 1 to the next position for tamping;

step ten, pulling out the inner pipe;

eleventh, pouring H into the outer tube₁Deep concrete;

step twelve, inserting an inner tube;

thirteen, drawing the outer tube to h height;

fourteen, forming a ramming head 3 by ramming an inner pipe;

fifteen, repeating the nine steps to the fourteen steps to form all the ramming heads 3, wherein the bottommost ramming head 3 is filled with H₂Deep concrete;

sixthly, the inner pipe 2 is pulled out, the outer pipe is filled with concrete, and then the outer pipe 1 is pulled out to obtain the multi-head concrete rammed pile.

In the sixteenth step, after the outer pipe 1 is pulled out, a tamping machine is used for tamping, and then the multi-head concrete rammed pile is obtained after concrete is solidified.

In a further development, the outer tube 2 has an inner diameter D and the tamper head 3 has a diameter D.

In a further refinement, D ═ 1.5D,1.8D ].

In a further refinement, h ═ 1.5d,2d ].

The further improvement is that the device is provided with a plurality of grooves,

wherein beta is the diameter expansion uneven coefficient of soil texture difference, and is 1.05-1.15; h₁The concrete height of the outer pipe is shown when the ramming is performed to form the ramming head outside the bottommost ramming head.

The further improvement is that the device is provided with a plurality of grooves,

wherein beta is the diameter expansion uneven coefficient of soil texture difference, and is 1.05-1.15; h₂The concrete height poured into the outer pipe when the bottommost ramming head is formed by ramming is shown.

The method of determining the D value and the H value and then determining the H value ensures that the D value meets the preset construction requirement. Because the h value is set reasonably, the efficiency is improved, and the uniformity and the construction quality of expanding are ensured.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the specification and the embodiments, which are fully applicable to various fields of endeavor for which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.