Is there any difference between a bored pile for mud wall protection and a bored pile?

The problem you said is not very clear, mud wall retaining cast-in-place piles.

Generally speaking, it is underwater perfusion, and the artificial perfusion you are talking about may be borehole waterless perfusion.

In order to make the hole not collapse when drilling, the clay slurry is injected into the hole, when drilling, the mud forms a mud skin on the hole wall, plays the role of wall protection, and does not collapse the hole, and the conduit is used when pouring concrete, and the conduit should be buried in the concrete 2 6m

When the water level is high, the use of digging piles, called dry piles, when casting, the use of conduit, or collusion, direct pouring of concrete, vibrating, can be, of course, can also be installed underwater cast-in-place pile of pouring pouring.

In terms of technology, bored piles are drilled into holes, drilled into holes by automobiles, drilled into holes by percussion, and so on. Some holes are dry and do not require mud wall protection; Some must protect the wall, which is called mud wall protection bored pile. Bored piles are divided into dry and mud wall protection according to the mud wall protection and non-wall protection.

By: Collier Chemical Slurry (

The bored pile construction method has the mud wall protection construction method, and the full set of pipe construction method, but the bored pile of the mud wall protection is more, and the bored pile of the mud wall protection is directly said to be the bored pile.

One of the bored piles is the mud wall protection bored pile, and there are also dry holes or other wall protection materials.

Need. Rotary drilling adopts the form of a power head, which uses strong torque to directly rotate and excavate drilling slag such as soil or gravel. First of all, it is necessary to distinguish the rotary drilling drilling process from percussion drilling and manual digging.

Dry rotary drilling is to use a crawler rotary drilling drill to drill the soil directly, and then use the rotary digging bucket to quickly raise the hole outside, and the dry soil is out. After excavation, it is placed around the drilling rig and transported out of the site by other machinery. The rotary digging bucket is generally not too large, about one meter high, and the rotary digging bucket is filled with disturbed soil to be put forward, and then continue to drill.

Therefore, at least one loader is needed to push away on the site, which will not affect the next rotary digging bucket to release the soil.

Wet rotary drilling needs to adjust the mud before drilling, and the hole is similar to the percussion drill, and the mud is required. The drill bit only has rotary digging teeth and no rotary digging bucket, and the disturbed soil is stirred into mud in the hole and pumped out, and the drill bit does not need to be lifted up every time to put the soil. Out of the soil is not dry soil but mud.

There should be a sedimentation tank in the site, and an excavator should be used to dig out the precipitated gravel and thick mud.

Summary. There are three differences between the mud wall protection bored pile and the dry operation hole cast-in-place pile, which are introduced as follows: 1. The application of the two is different

1. The application of mud wall protection bored pile: a hole-forming construction process for wall protection with mud with relative density greater than 1 in the hole, and this hole-forming method is applicable regardless of the soil layer of groundwater level.

There are three differences between the mud wall protection bored pile and the dry operation hole cast-in-place pile, which are introduced as follows: 1. The two should be searched and used differently: 1. The application of the mud wall protection bored pile

In the hole, a kind of hole-forming construction process is carried out with the mud with relative density greater than 1 to protect the wall, and this hole-forming mode is applicable regardless of the soil layer of the water level of the underground member.

2. Application of dry operation hole-in-place pile: due to the advantages of no vibration, no soil squeezing, low noise, and suitable for use in dense urban building areas, cast-in-place piles have been widely used in construction. Second, the classification of the two is different:

1. Classification of mud wall protection bored piles: it can be divided into percussion hole-forming piles, punching and grabbing hole-forming piles, rotary drilled piles and submersible drilled hole-filled piles. Among them, rotary drilled cast-in-place piles are the most widely used, which is a pile forming method with a wide range of applications in China.

2. Classification of dry operation hole-forming cast-in-place piles: according to the different processes of hole-forming piles, cast-in-place piles can be divided into cast-in-place piles with holes in dry operations, cast-in-place piles with mud wall protection and cast-in-place piles with artificial holes. 3. The essence of the two is different:

1. The essence of the mud wall protection bored pile: the mud wall protection bored pile is a pile made by slowly drilling under the condition of mud wall protection by a pile driver, using the mud to bring this mold out, and protecting the hole wall from collapsing, and then replacing the mud with the method of underwater concrete pouring after the hole is formed. 2. The essence of dry operation into a hole cast-in-place pile:

It can be seen from the process principle of hole formation of the reverse circulation rotary drilling rig that the direction of the flow of mud with slag is opposite to that of the hole formation of the positive circulation rotary drilling rig. Reverse circulation process.

1. Difference: that is, during the construction of cast-in-place piles, the dry operation method does not use mud (including water) to protect the wall.

In the wet work method, mud (including water) must be used to protect the wall.

2. Difference: dry operation method: construction site, must do a good job of "three links and one level". And according to the site conditions, the ground concrete cushion is made first if conditions are available, so as to facilitate the construction.

Mud wall protection construction method: drainage ditches and collection wells should be set up around the site, and the stagnant water should be pumped out of the pile holes, and the bipi can be discharged into the sewer after precipitation and meeting the environmental protection requirements. The excavation route at the construction site should be unobstructed.

3. Difference: dry operation method: according to the construction drawings to accurately pay-off, release the pile centerline and pile diameter, and carefully carry out technical review, and go through the visa procedures of the relevant departments before the excavation of the pile earthwork.

Mud wall protection construction method: the center position of the pile should lead out four pile core control points to the four sides of the pile, and calibrate with a firm wooden pile. Before construction, the technical person in charge of the construction site and the constructor should comprehensively check the construction preparation hole by hole, carry out technical safety disclosure and safety education step by step, and ensure that safety and technical management are implemented in thought, organization and measures.

Repentance. <>

The construction process of bored piles for mud wall protection: site leveling, pile position pay-off, excavation of slurry pool, slurry ditch, casing burial, drilling rig in place, hole position correction, hole formation, mud circulation, removal of waste slurry, mud slag hole cleaning and slurry change, final hole acceptance, reinforcement cage and steel conduit, secondary hole cleaning, pouring underwater concrete, pile.

According to the different hole forming processes, the mud wall protection cast-in-place pile is divided into forward (reverse) circulation drilling rig, percussion drilling rig, rotary drilling rig, multi-branch disc cast-in-place pile driver, bottom expansion machinery drilling tools and other pile driver equipment.

Summary. The difference is very different in principle, the bored pile is: after drilling out of the hole, clean the hole, put it into the reinforcement cage, and then pour the concrete into it with a pipe; The concrete jet grouting pile is the superfluidic concrete cast-in-place pile you said, which is to use the concrete with large slumpability, workability and good fluidity, pressed into it under the condition of high pressure of the concrete pump, expanded into a pile, and then put it into a reinforcement cage.

The applicability of this kind of pile is relatively large, mainly because the bearing capacity is high, and the bored pile, when drilling, dilutes the surrounding layer and causes the pile friction to become smaller, and the jet grouting pile, on the contrary, increases the compactness of the surrounding layer, and correspondingly improves the bearing capacity. Personal understanding.

The difference between bored grouting pile, post-grouting pile, and mud wall protection hole-forming cast-in-place pile.

Hello, Correspondingly, the early eggplant has a higher bearing capacity. Bored piles are widely used, and are mostly suitable for dry operations.

The difference is very different in principle, the bored pile is: after drilling out of the hole, clean the hole, put it into the reinforcement cage, and then pour the concrete into it with a pipe; The concrete jet grouting pile is the superfluidic concrete cast-in-place pile you said, which is a slow use of concrete with large slumpability, workability and good fluidity, pressed into it under the condition of high pressure of the concrete pump, expanded into a pile, and then put into the reinforcement cage. The applicability of this kind of pile is relatively large, mainly because the bearing capacity is high, and the bored pile, when drilling, dilutes the surrounding layer and causes the pile friction to become smaller, and the rotary grouting pile, on the contrary, increases the compactness of the surrounding layer, and correspondingly improves the load-bearing dust high force.

Personal pie which ruler understands.

Kiss! Hello, happy to answer your <>

The key points of the construction of the mud wall protection bored pile are as follows: 1. Leveling the site, no matter what kind of mechanical hole is used, the required site is much larger than the cushion cap, especially the design elevation, which is generally more economical than the design elevation to about 2m. 2. Construction lofting, release the center position of the pile foundation, and take measures to determine the center position of the pile during the drilling process.

3. Bury the casing to ensure that there is no slurry leakage during construction. 4. The specific importance of the mud in the process of hole formation is about about large. 5. Observe the stone rocks in the process of hole formation, and distinguish the rocks with different weathering degrees to meet the requirements of the design rock socketing depth.

6. When the design requirements are met, start to clean the holes, and pay attention to the gradual reduction of the specific gravity of the mud when cleaning the holes, and the specific gravity of the mud will meet the design requirements in about 6 12 hours. 7. Under the reinforcement cage, a protective layer cushion block is arranged, and the reinforcement cage is fixed by welding the suspension bar according to the actual depth and design depth. 8. Under the conduit, check the water tightness, the concrete slump is required to be 20 2cm, the amount of concrete in the first plate can form a sealed hole, and the conduit should be slowly lifted when pouring, and the depth of the conduit should be ensured that the concrete is buried in the conduit depth of more than 2m during the removal of the conduit.

9. When pouring concrete, measure the depth in time, and the concrete surface is higher than the design surface. 10. Excavate the earthwork to the design elevation and chisel out the excess pile head. I hope I can help you <>

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