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Deep foundation pit supporting structure and deep foundation pit construction method

A technology for supporting and supporting piles in deep foundation pits, which can be applied in infrastructure engineering, excavation, sheet pile walls, etc.

Inactive Publication Date: 2021-06-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used methods in the existing deep foundation pit engineering mainly include the cement retaining wall type and pile sheet wall type, but after the deep foundation pit engineering is completed in some important urban areas, there will still be some soil and water seepage , which will have a certain impact on the subsequent construction. This is because there used to be rivers and ponds in some underground soil layers, which made the soil soft and slippery with high water content, which made it difficult to carry out deep foundation pit engineering and support after the completion of the project. The structure does not completely flow out the soil and water

Method used

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  • Deep foundation pit supporting structure and deep foundation pit construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A deep foundation pit construction method:

[0042] S1: Select the relatively hard soil on site for grading, and install protective nets and warning signs around it, and then excavate a deep foundation pit for the first time, the depth of which is 1 / 4 of the depth of the deep foundation pit;

[0043] S2: Use the rotary percussion drill and eccentric drill to drill into the wall casing. After the completion, use high-pressure air to clean the inner wall of the hole, so as to ensure that the inner wall of the drilled hole is firmly bonded to the mortar. In addition, when drilling, it must be dry drilling;

[0044] S3: Select 20m steel cables for making the soil layer anchor 503, and steel cables are provided with steel frames every 2m. A plastic outer sleeve is set, and a guide cone is set at one end of the cable, which plays a guiding role when the cable enters the hole, preventing the cable from getting stuck when entering the hole, and the other end of the cable is fi...

Embodiment 2

[0050] A deep foundation pit construction method:

[0051] S1: Select the relatively hard soil on site for grading, and install protective nets and warning signs around it, and then excavate a deep foundation pit for the first time, the depth of which is 1 / 4 of the depth of the deep foundation pit;

[0052] S2: Use the rotary percussion drill and eccentric drill to drill into the wall casing. After the completion, use high-pressure air to clean the inner wall of the hole, so as to ensure that the inner wall of the drilled hole is firmly bonded to the mortar. In addition, when drilling, it must be dry drilling;

[0053] S3: Select 30m steel cables for making the soil layer anchor rod 503. The steel cables are provided with steel frames every 2.5m. The section is equipped with a plastic outer sleeve, and one end of the cable is provided with a guide cone, which plays a guiding role when the cable enters the hole, preventing the cable from getting stuck when entering the hole, a...

Embodiment 3

[0059] A deep foundation pit construction method:

[0060] S1: Select the relatively hard soil on site for grading, and install protective nets and warning signs around it, and then excavate a deep foundation pit for the first time, the depth of which is 1 / 4 of the depth of the deep foundation pit;

[0061] S2: Use the rotary percussion drill and eccentric drill to drill into the wall casing. After the completion, use high-pressure air to clean the inner wall of the hole, so as to ensure that the inner wall of the drilled hole is firmly bonded to the mortar. In addition, when drilling, it must be dry drilling;

[0062] S3: Select 30m steel cables for making the soil layer anchor rod 503, and steel cables are provided with steel frames every 3m. A plastic outer sleeve is set, and a guide cone is set at one end of the cable, which plays a guiding role when the cable enters the hole, preventing the cable from getting stuck when entering the hole, and the other end of the cable i...

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Abstract

The invention relates to the technical field of building construction, and discloses a deep foundation pit supporting structure and a deep foundation pit construction method. The deep foundation pit supporting structure comprises a soil layer, waterproof curtains, a supporting assembly, a force bearing assembly and an anchor rod assembly, wherein a foundation pit is formed in the top of the soil layer, and the waterproof curtains are fixedly connected with the inner wall of the soil layer. According to the deep foundation pit supporting structure and the deep foundation pit construction method a front-row plate and a rear-row plate are supported through the supporting assembly, an inclined plate is fixedly arranged between the front-row plate and the rear-row plate, and therefore the stability of deep foundation pit supporting is improved; the waterproof curtains are arranged behind the rear-row plate and in front of the front-row plate, and therefore water and soil are intercepted in a double mode; in addition, the stability of the front-row plate and the rear-row plate is improved through the anchor rod assembly, and therefore, the supporting effect of the supporting structure is further improved, and deep foundation pit engineering can be smoothly carried out in some wet and soft soil layer areas without water seepage and soil leakage.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a deep foundation pit support structure and a deep foundation pit construction method. Background technique [0002] In the development and utilization of urban space, the deep foundation pit project is the first construction project. [0003] At present, the commonly used methods in the existing deep foundation pit engineering mainly include the cement retaining wall type and pile sheet wall type, but after the deep foundation pit engineering is completed in some important urban areas, there will still be some soil and water seepage , which will have a certain impact on the subsequent construction. This is because there used to be rivers and ponds in some underground soil layers, which made the soil soft and slippery with high water content, which made it difficult to carry out deep foundation pit engineering and support after the completion of the project. The st...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D17/02E02D5/74E02D19/12E02D5/22
CPCE02D5/22E02D5/74E02D17/02E02D17/04E02D19/12
Inventor 徐赞曹文贵张超崔鹏陆刘涛
Owner HUNAN UNIV