Foundation pit support breast beam wire saw cutting method

A cutting method and foundation pit support technology, which is applied in excavation, infrastructure engineering, construction, etc., can solve the problems that diamond wire saws cannot be cut and concrete blocks are difficult to lift, and achieve less labor waste, easy operation, and reduced The effect of cost and time

Inactive Publication Date: 2019-04-05
CHINA MCC20 GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using a wire saw to cut and remove the waist beam, the diamond wire saw cannot bypass the beam body like a support beam for cutting, and there are great difficulties in lifting the cut concrete blocks

Method used

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  • Foundation pit support breast beam wire saw cutting method
  • Foundation pit support breast beam wire saw cutting method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] Such as Figure 1-2 Shown: a wire saw cutting method for foundation pit support waist beam, it includes the following steps:

[0022] Step 1: Plant reinforcement on the cast-in-place pile according to the design requirements, chisel the contact surface between the cast-in-place pile 1 and the waist beam 2, and start binding the waist beam reinforcement;

[0023] Step 2: After the reinforcement of the waist beam is bound, plan the cutting scheme of the waist beam 2 wire saw, and draw the cutting block diagram;

[0024] Step 3: Pre-embed D50 PVC casing 3 at a distance of 100mm from the cast-in-place pile on the dividing line on the block diagram. The casing is more than 100mm higher than both sides, and the finished product should be protected to avoid casing blockage;

[0025] Step 4: According to the block diagram, pre-embed round steel hooks 4 with a diameter of 20mm at a distance of 100mm from the edge on both sides of each concrete block to be cut;

[0026] Step 5:...

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PUM

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Abstract

The invention relates to a foundation pit support breast beam wire saw cutting method which includes the steps: firstly, embedding steel bars into cast-in-place piles, daubing contact surfaces among the cast-in-place piles and a breast beam, and binding breast beam reinforcing steel bars; secondly, drawing cutting block diagrams; thirdly, pre-embedding PVC (polyvinyl chloride) sleeves, and avoiding blocking of the sleeves; fourthly, pre-embedding round steel lifting hooks on two sides of each concrete block to be cut; fifthly, constructing beam plate structures below a supporting beam and thebreast beam, and cutting parts of the pre-embedding PVC sleeves higher than beam surfaces; sixthly, arranging supporting systems at the bottom of the supporting beam; seventhly, arranging sleepers onthe supporting beam; eighthly, fixing a wire saw machine on the breast beam; ninthly, enabling a diamond wire saw to wound the pre-embedding PVC sleeves, and connecting the diamond wire saw with the wire saw machine to cut concrete blocks; tenthly, hosting the cut concrete blocks by the round steel lifting hooks to off-site place to be crushed. According to the method, noise and dust pollution aredecreased, the cut concrete blocks are transferred to off-site place to be crushed, and inside cleaning cost and time are reduced.

Description

technical field [0001] The invention relates to a wire saw cutting method, in particular to a wire saw cutting method for foundation pit support waist beams. Background technique [0002] In the deep foundation pit support system combined with cast-in-situ piles and internal supports, the first support is usually provided with crown beams on the support piles, and the second support and below are provided with waist beams on the side of the support piles. When the distance between the pile and the basement exterior wall is small, the waist beam often hinders the earthwork backfilling construction outside the basement, so the waist beam must be removed. The retaining piles are reliably connected. When using a wire saw to cut and remove the waist beam, the diamond wire saw cannot bypass the beam body for cutting like a support beam, and there is also great difficulty in lifting the cut concrete blocks. Contents of the invention [0003] The present invention aims to overco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 张健张建文王立强李义轩丁诚刘培文张少军原飞
Owner CHINA MCC20 GRP CORP
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