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Pile-net composite roadbed pile top differential settlement control method

A differential settlement and control method technology, applied to roads, roads, buildings, etc., can solve problems such as differential settlement of long-term pile networks

Active Publication Date: 2015-09-30
CHINA MCC20 GRP CORP
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Problems solved by technology

The present invention is produced from the engineering practice of subgrade treatment in coastal silt soft soil area, and mainly solves the problem of differential settlement of long-term pile networks

Method used

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  • Pile-net composite roadbed pile top differential settlement control method

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Embodiment Construction

[0033] Such as figure 1 As shown, the pile-net composite subgrade pile top differential settlement control method of the present invention comprises the following steps:

[0034] Step 1: Analyze the road geological survey report, design the pile network and the upper cushion layer;

[0035] a) Analyze the geological survey report to draw a plane distribution map of the soft soil layer along the entire road, the thickness of the vertical soft soil layers, and indicate the physical and mechanical indicators of the classified soft soil, determine the pre-consolidation pressure of the silt according to the compression test, and compare the pre-consolidation Analyze the degree of silt consolidation and mark the under-consolidated area on the plan; check the geological exploration data along the line, and draw continuous curves of the thickness of the longitudinal and transverse layers on the left and right sides of the road.

[0036] b) Design the pile type, pile spacing and pile ...

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Abstract

The invention relates to roadbed pile construction and particularly relates to a roadbed pile top settlement control method. A pile-net composite roadbed pile top differential settlement control method comprises the following steps: step 1: analyzing a road geological survey report; designing a pile net and an upper cushion layer; step 2: combining construction possible errors and subsequent site condition changes to carry out settlement risk estimation; step 3: designing a pile-net straining beam or a plate-strip concrete section and reinforcing bars; and step 4: finishing pile net, straining beam and cushion layer construction according to the sequence. The pile-net composite roadbed pile top differential settlement control method is generated from engineering practice of marine facies sludge soft soil roadbed treatment, and a long pile-net differential settlement problem is mainly solved.

Description

technical field [0001] The invention relates to roadbed pile construction, in particular to a method for controlling the top settlement of roadbed piles. Background technique [0002] The pile-net composite subgrade usually consists of a pile-net system, a horizontally reinforced cushion system, and a backfill arch system. Its advantage is that the pile-net reinforcement can evenly transfer the upper road load to the deep foundation, which can improve the bearing capacity of the soft soil foundation. It can effectively control settlement and is widely used in soft soil areas. However, under the conditions of deep flow plastic silt layer and thin bearing layer, there are still many hidden dangers in road settlement control, mainly due to the long-term consolidation settlement of underconsolidated soft soil, negative friction around piles, etc. Due to the uncertainty of resistance and the errors of exploration and construction, it is difficult to coordinate the long-term diff...

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Application Information

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IPC IPC(8): E01C3/04
Inventor 何健孔维一刘峰黄骥郑学刚刘志浩
Owner CHINA MCC20 GRP CORP
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