Foundation pit supporting pile using pipe casting pile embedding in rock

A technology for foundation pit support and pipe fittings, which is applied to sheet pile walls, foundation structure engineering, construction, etc., to achieve the effect of high construction safety, low efficiency and good safety performance.

Inactive Publication Date: 2010-09-08
蓝冰
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the disadvantages of long construction period, high cost, and potential safety hazards in the rock-socketed part of the cast-in-place pile in the prior art, the present invention provides a foundation pit support and protection pile using pipe piles for rock-socketing. By controlling the number of small holes and reducing the number of drilling Hole costs, overcoming centering difficulties during construction, and solving the strength problem of bedrock due to crack development, to shorten the construction period, reduce costs, and eliminate potential safety hazards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Foundation pit supporting pile using pipe casting pile embedding in rock
  • Foundation pit supporting pile using pipe casting pile embedding in rock
  • Foundation pit supporting pile using pipe casting pile embedding in rock

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Due to the shallow foundation pit, cantilever type support piles are adopted after calculation, and the depth of the foundation pit is 8m.

[0032] As shown in Figure 1, the supporting piles are arranged according to the drawing, and the hole is drilled downward from the ground 1 with a diameter of 800mm. The drilling stops when it reaches the bedrock surface, and the bedrock surface is buried at a depth of about 9m. According to the calculation, the designed reinforcement cage is uniformly distributed with 16 25mm secondary steel bars, and 4 pipe fitting piles are designed. The seamless geological steel pipe with a diameter of 89mm and a wall thickness of 10mm is used as the material, and the pipe fitting piles are formed from the hole to the bottom of the hole. Holes with a diameter of 90mm, the pipe fittings are embedded 3.0m below the bedrock surface, extend into the support piles 1.0m, and pour cement mortar into the pipe fittings. After the construction of the pip...

example 2

[0034] When the excavation of the foundation pit is deep and the cantilever support cannot meet the technical and safety requirements, the method of support pile plus anchorage or support is used for support. This example is an example of combined support with pipe support. The foundation pit is 10.0m deep, with complex geological conditions and high requirements for the surrounding environment.

[0035] As shown in Figures 2, 3 and 4. The excavation depth of this foundation pit project is 10m. It is the sump of a smeltery wastewater "zero discharge" project. The construction period is extremely tight. The surrounding environment of the foundation pit is complex and the site is narrow. Since the foundation pit is close to the equipment factory building, large vibrations are not allowed in the surrounding area, and punching construction and blasting construction are not allowed. The support piles are designed to be supported by manual excavation piles; because the secondary sup...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a foundation pit supporting pile socketed by pipe pile, which includes an upper supporting cast-in-place pile and a lower socketing pipe pile. The supporting cast-in-place pile consists of the pile body concrete and the pile body reinforcing bars, and the diameter of the pile hole is 0.8 to 2.0mm; the socketed pipe pile is formed by inlaying the pipe into the foundation rock, with cement slurry poured; the upper part of the pipe is inserted into the supporting cast-in-place pile and connected with the pile body reinforced bars. The invention adopts a drilling rig to conduct hole drilling, pipe laying and cast-in-place of the pipe at the hole opening, during which the diameter of the small holes is big, the number of holes is small, the pipe laying is highly correct, the cost is low and the construction speed is very high; the socketed pipe pile connects the foundation pit and the supporting cast-in-place pile which makes full use of the strength of the rock and saves the price of the concrete for socketing, and the technologies are simple, which reduces the cost and shortens the construction period; the invention can vertically cross caverns in karst areas, which saves concrete and ensure stability of the socketed sections of supporting piles; and the invention also has advantages to no explosion, no vibration and high construction safety.

Description

【Technical field】 [0001] The invention belongs to the field of foundation engineering, and in particular relates to a foundation pit support and protection pile with pipe fitting piles embedded in rock. 【Background technique】 [0002] At present, due to the large lateral soil pressure and complex geological conditions of deep and large foundation pits, pile anchors or internal supports are mostly used for excavation of foundation pits. The calculation determines that at a certain depth below the bottom of the foundation pit, the pile body is reinforced and concrete is poured. However, when the design support piles require rock-socketed construction, often due to the hard bedrock, slow construction speed, vibration or blasting construction, the use safety of the surrounding environment of the foundation pit is affected. When the support piles are excavated piles, there is still personal safety. The problem is that concrete overfilling still exists in karst-developed areas. A...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): E02D5/38E02D5/54
Inventor蓝冰张可能高成梁邓新德李大浪
Owner蓝冰