Cast-in-situ bored pile foundation retaining wall circulation separation type mud pit

Abstract

A cast-in-situ bored pile foundation retaining wall circulation separation type slurry pond comprises a sedimentation pond and a slurry pond, the sedimentation pond is divided into a first sedimentation pond and a second sedimentation pond, and the first sedimentation pond and the second sedimentation pond are arranged at the two ends of the slurry pond respectively. The middle of the wall of the slurry pond is communicated with the first settling pond and the second settling pond through slurry passing holes, the slurry passing holes are provided with flashboards used for opening and closing the slurry passing holes, the first settling pond and the second settling pond are correspondingly communicated with slag removal ponds through overflow ports respectively, and the overflow ports are higher than the slurry passing holes in position. And the bottom of the slag removal tank is also communicated with the corresponding No.1 sedimentation tank and No.2 sedimentation tank through water permeable pipes. The cast-in-situ bored pile foundation retaining wall circulating separation type mud pit is divided into three functional zones, namely the mud pit, the sedimentation tank and the slag removal tank, mud preparation and supply and drilling slag separation are integrated, a plurality of pile foundations can be used together, and damage to the surrounding environment due to excavation and use of the mud pit is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bridge pile foundation construction, in particular to a bored pile pile foundation protection wall circulation separation type slurry pool. BACKGROUND

[0002] In the bridge construction process, in order to increase the structural strength of bridge pile body, usually need to drill well in the foundation during construction, and insert pile foundation in the well to improve the structural strength of pile body, drilling mud is used in the bridge pile foundation drilling construction, drilling mud, drilling fluid, commonly known as mud, plays a very important role in the drilling operation. Mud has many functions, mainly carrying rock debris from the bottom of the hole to the ground. In addition, mud also plays a role in protecting the wall of the hole, permeating to a certain range of the stratum on the drilling wall and adhering to the particles, and through this adhesion effect, the drilling wall can reduce collapse and water seepage.

[0003] The role of the slurry pool is to provide space for the circulation of the slurry, and the slurry in the slurry pool will precipitate and filter the drilling cuttings brought out of the borehole, on the other hand, it will temporarily store the slurry and provide it to the slurry pump to pump new slurry into the borehole for circulation. In the traditional construction method, the slurry pool is generally set according to the site conditions by excavating on the original ground or using a square slurry pool made of bricks or large steel barrels to circulate drilling fluid. The general slurry pool includes a sedimentation tank and a circulation tank, which are connected to each other. After the slurry is circulated through the slurry pool, the soil residue and drilling cuttings carried in the slurry need to be filtered and precipitated in the pool to maintain the density of the slurry within a certain value and keep the system running stably. In order to maintain the density of the slurry, the slurry pool needs to be cleaned after a period of use. If the slurry pool cannot be cleaned in time, it will directly lead to a series of problems such as the pile hole formed shortly after the hole is formed, and the pH value is low, the sand content is high, and the suspension ability is poor. Therefore, the traditional slurry pool is generally arranged beside the construction pile foundation, and only used for the construction of the pile foundation and the adjacent pile foundation, the utilization rate of the slurry pool is low, and multiple slurry pools are generally needed for each span of bridge pile foundation to meet the construction requirements, and it is not convenient to use the same slurry pool for multiple pile hole drilling and pouring construction. SUMMARY

[0004] The utility model aims at providing a kind of bored pile pile foundation protection wall circulation separation type slurry pool, the bored pile pile foundation protection wall circulation separation type slurry pool of the utility model is divided into slurry pool, sedimentation tank and clear residue pool three functional divisions, mud preparation, supply and drilling cuttings separation are integrated, multiple pile foundations can be used in common, and the damage to the surrounding environment caused by slurry pool excavation and use is reduced.

[0005] The utility model is implemented by the following technical solutions:

[0006] The application discloses a circulating separation type mud pool for a bored pile foundation wall protection, which comprises a sedimentation pool and a slurry pool, wherein the sedimentation pool is divided into a first sedimentation pool and a second sedimentation pool, the first sedimentation pool and the second sedimentation pool are respectively arranged at two ends of the slurry pool, the middle part of the pool wall of the slurry pool is respectively communicated with the first sedimentation pool and the second sedimentation pool through slurry passing holes, the slurry passing holes are provided with gate plates for opening and closing the slurry passing holes, the first sedimentation pool and the second sedimentation pool are respectively communicated with a corresponding deslag pool through overflow ports, the position of the overflow ports is higher than that of the slurry passing holes, and the bottom of the deslag pool is further communicated with the corresponding first sedimentation pool and second sedimentation pool through water permeating pipes.

[0007] Further preferably, the deslag pool is arranged at the end far from the slurry pool in the first sedimentation pool and the second sedimentation pool, the water permeating pipe is divided into a transverse water permeating pipe and a longitudinal water permeating pipe, the transverse water permeating pipe communicates the two sides of the deslag pool with the sedimentation pool, and the longitudinal water permeating pipe communicates the opposite sides of the deslag pool and the slurry pool with the sedimentation pool.

[0008] Further preferably, the longitudinal water permeating pipe is communicated with a vertical water permeating pipe.

[0009] Further preferably, the upper end of the deslag pool is connected with a drainage channel, and excessive clean water is discharged through the drainage channel.

[0010] Further preferably, the first sedimentation pool and the second sedimentation pool are both arranged in an H-shaped structure.

[0011] Further preferably, the four ends of the two sides of the first sedimentation pool and the second sedimentation pool are respectively connected with adjacent pile foundation holes through return channels.

[0012] The circulating separation type mud pool for bored pile foundation protection wall is used as follows: firstly, mud is prepared in the sedimentation pool, the mud pump is placed in a corner of the sedimentation pool to prepare mud, and the mud replaced by punching is discharged into the sedimentation pool, which is consistent with the use method of the conventional mud pool. In order to meet the minimum water level requirement, the mud pool is punched and the clean water is added in the clean pool, and when the depth of the mud in the pool is greater than 1.2 meters, the normal use stage is entered. When the mud liquid level of the sedimentation pool reaches the elevation of the mud pool, the gate is opened, the mud can flow into the mud pool, the mud pump is transferred from the sedimentation pool to the mud pool, and the mud replaced by the pile foundation hole is discharged into the sedimentation pool. The mud replaced from the pile hole to the sedimentation pool is returned to the mud pool after sedimentation (after sedimentation in the sedimentation pool, three layers of sediment, mud and water appear from low to high in the pool, and the mud flows into the mud pool through the mud hole). The clean water should be directly added in the sedimentation pool to offset the water loss due to natural penetration. When the hole is cleaned, the water is directly pumped from the clean pool to the pile foundation hole, and the mud is directly discharged into the sedimentation pool, and the circulating washing is completed. When the first sedimentation pool is full and needs to be discharged, the water can be directly pumped from the clean pool of the first sedimentation pool to the second sedimentation pool, so as to realize the separation of water and slag, and the reuse of the mud and water in the pool. Finally, the excavator and the slag transport vehicle are used to discharge and transport the slag in the first sedimentation pool. The use of the invention is explained as follows: when one pile is cleaned, another pile is punched at the same time. The mud discharged from the cleaning and punching is directly discharged into the sedimentation pool, and the difference between the cleaning and the punching is that the water is directly pumped from the clean pool in the cleaning, and the mud is directly taken from the mud pool in the punching, and each takes what it needs without interfering with each other.

[0013] The circulating separation type mud pool for bored pile foundation protection wall is used as follows: firstly, mud is prepared in the sedimentation pool, the mud pump is placed in a corner of the sedimentation pool to prepare mud, and the mud replaced by punching is discharged into the sedimentation pool, which is consistent with the use method of the conventional mud pool. In order to meet the minimum water level requirement, the mud pool is punched and the clean water is added in the clean pool, and when the depth of the mud in the pool is greater than 1.2 meters, the normal use stage is entered. When the mud liquid level of the sedimentation pool reaches the elevation of the mud pool, the gate is opened, the mud can flow into the mud pool, the mud pump is transferred from the sedimentation pool to the mud pool, and the mud replaced by the pile foundation hole is discharged into the sedimentation pool. The mud replaced from the pile hole to the sedimentation pool is returned to the mud pool after sedimentation (after sedimentation in the sedimentation pool, three layers of sediment, mud and water appear from low to high in the pool, and the mud flows into the mud pool through the mud hole). The clean water should be directly added in the sedimentation pool to offset the water loss due to natural penetration. When the hole is cleaned, the water is directly pumped from the clean pool to the pile foundation hole, and the mud is directly discharged into the sedimentation pool, and the circulating washing is completed. When the first sedimentation pool is full and needs to be discharged, the water can be directly pumped from the clean pool of the first sedimentation pool to the second sedimentation pool, so as to realize the separation of water and slag, and the reuse of the mud and water in the pool. Finally, the excavator and the slag transport vehicle are used to discharge and transport the slag in the first sedimentation pool. The use of the invention is explained as follows: when one pile is cleaned, another pile is punched at the same time. The mud discharged from the cleaning and punching is directly discharged into the sedimentation pool, and the difference between the cleaning and the punching is that the water is directly pumped from the clean pool in the cleaning, and the mud is directly taken from the mud pool in the punching, and each takes what it needs without interfering with each other. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the arrangement structure of the circulating separation type mud pool for bored pile foundation protection wall;

[0015] Figure 2is Figure 1 A-A cross-sectional view of the schematic diagram in

[0016] Figure 3 is Figure 1 B-B cross-sectional view of the schematic diagram in

[0017] Figure 4 is Figure 1 C-C cross-sectional view of the schematic diagram in

[0018] The name corresponding to the serial number in the figure is:

[0019] 1, pile hole; 2, backflow channel; 3, No. 1 sedimentation tank; 4, drainage channel; 5, horizontal water permeable pipe; 6, longitudinal water permeable pipe; 7, overflow; 8, deslagging tank; 9, vertical water permeable pipe; 10, slurry tank; 11, slurry passing hole; 12, gate; 13, No. 2 sedimentation tank. DETAILED DESCRIPTION

[0020] The technical solutions in the application will be clearly and completely described below in combination with embodiments, and the described embodiments are only a part of the application, not all the embodiments. EMBODIMENT

[0021] A punched cast-in-place pile foundation wall protection circulating separation type slurry tank, comprising a sedimentation tank and a slurry tank 10, the sedimentation tank is divided into No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13, No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13 are respectively arranged at two ends of the slurry tank 10, the middle position of the tank wall of the slurry tank 10 is respectively communicated with No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13 through slurry passing holes 11, the slurry passing holes 11 are provided with gates 12 for opening and closing the slurry passing holes 11, No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13 are respectively communicated with a deslagging tank 8 through corresponding overflow ports 7, the position of the overflow port 7 is higher than that of the slurry passing hole 11, and the tank bottom of the deslagging tank 8 is further communicated with corresponding No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13 through water permeable pipes.

[0022] The deslagging tank 8 is arranged at the end away from the slurry tank 10 in No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13 respectively, the water permeable pipe is divided into a horizontal water permeable pipe 5 and a longitudinal water permeable pipe 6, the horizontal water permeable pipe 5 communicates the two sides of the deslagging tank 8 with the sedimentation tank, and the longitudinal water permeable pipe 6 communicates the opposite sides of the deslagging tank 8 and the slurry tank 10 with the sedimentation tank.

[0023] The longitudinal water permeable pipe 6 is communicated with a vertical water permeable pipe 9.

[0024] The upper end of the deslagging tank 8 is connected with a drainage channel 4, and excessive clean water is discharged through the drainage channel 4.

[0025] No. 1 sedimentation tank 3 and No. 2 sedimentation tank 13 are both provided in a I-shaped structure.

[0026] The four ends of the first and second sedimentation tanks 3 and 13 are connected to the adjacent pile hole 1 through the backflow channel 2.

[0027] At a construction site in Guangxi Zhuang Autonomous Region, the size of the slurry tank is 5m x 2m, the size of the slag removal tank is 2m x 2m, and the size of the sedimentation tank is about 14m x 11m. The foundation pit is excavated to a depth of 2m, and the slope of the foundation pit is 1:0.5. The excavation of the slurry tank foundation pit is carried out according to the principle of mechanical excavation first and manual finishing later. The elevation of the excavation face is monitored and controlled at any time during excavation using a level to prevent over-excavation. When the excavation is about 20-30cm from the design elevation, manual finishing is used to reach the design elevation. After the mechanical excavation of the foundation pit, the excavated slope is manually finished to accurately locate the slurry tank and the slag removal tank. Manual excavation and finishing are performed, cement bricks are laid, and appropriate waterproofing is performed. Hard water-permeable pipes are installed during cement brick laying. The project uses 3m standard section hard water-permeable pipes, 6m and 9m long hard water-permeable pipes are connected using straight-through and three-way pipes, and 3m hard water-permeable pipes can be cut into two 1.5m hard water-permeable pipes. After the slurry tank is completed, a submersible pump and a slurry maker are installed. Clay or bentonite, water, and other slurry-making materials are added to the slurry tank to make slurry, and the working performance of the slurry tank is checked.

[0028] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Within the scope of the present application, changes, modifications, additions, or substitutions made by those skilled in the art should be within the scope of the present application.

Claims

1. A circulating separation mud pit for the wall protection of bored pile foundations, comprising a sedimentation tank and a slurry tank (10), characterized in that: The sedimentation tank is divided into sedimentation tank No. 1 (3) and sedimentation tank No. 2 (13). Sedimentation tank No. 1 (3) and sedimentation tank No. 2 (13) are respectively located at both ends of slurry tank (10). The middle part of the wall of slurry tank (10) is connected to sedimentation tank No. 1 (3) and sedimentation tank No. 2 (13) through slurry passage hole (11). Slurry passage hole (11) is equipped with gate (12) for opening and closing slurry passage hole (11). Sedimentation tank No. 1 (3) and sedimentation tank No. 2 (13) are respectively connected to a slag removal tank (8) through overflow port (7). The position of overflow port (7) is higher than the position of slurry passage hole (11). The bottom of slag removal tank (8) is also connected to the corresponding sedimentation tank No. 1 (3) and sedimentation tank No. 2 (13) through water permeable pipe.

2. The circulating and separating mud pit for borehole pile foundation wall protection according to claim 1, characterized in that: The slag removal tanks (8) are respectively located at the ends of the sedimentation tanks (3) and (13) away from the slurry tank (10). The permeable pipes are divided into transverse permeable pipes (5) and longitudinal permeable pipes (6). The transverse permeable pipes (5) connect the two sides of the slag removal tank (8) to the sedimentation tank, and the longitudinal permeable pipes (6) connect the opposite sides of the slag removal tank (8) and the slurry tank (10) to the sedimentation tank.

3. The circulating separation mud pit for borehole pile foundation wall protection according to claim 2, characterized in that: The longitudinal permeable pipe (6) is connected to the vertical permeable pipe (9).

4. The circulating separation mud pit for borehole pile foundation wall protection according to claim 1 or 2, characterized in that: The upper end of the slag removal pool (8) is connected to a drainage ditch (4).

5. The circulating and separating mud pit for borehole pile foundation wall protection according to claim 1, characterized in that: Both the No. 1 sedimentation tank (3) and the No. 2 sedimentation tank (13) are designed with an I-shaped structure.

6. The circulating separation mud pit for borehole pile foundation wall protection according to claim 5, characterized in that: The four ends of the No. 1 sedimentation tank (3) and the No. 2 sedimentation tank (13) are respectively connected to the adjacent pile foundation holes (1) through the return channel (2).

Images