Pipe-jacking well opening soil body reinforcing process for soft soil foundation

A soil reinforcement and soft soil foundation technology, applied in soil protection, infrastructure engineering, protection devices, etc., can solve the problems of high cost, low excavation efficiency, long construction period, etc., to achieve low cost, short construction period, reduce Effect of small jacking resistance

Active Publication Date: 2021-12-03
广东一新长城建筑集团有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the defects of long construction period, high cost, and low excavation efficiency when the pipe jacking machine goes in and out of the hole, this application provides a soil reinforcement process for the hole of the pipe jacking well on soft soil foundation.

Method used

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  • Pipe-jacking well opening soil body reinforcing process for soft soil foundation

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Embodiment Construction

[0033] The following is attached figure 1 The application is described in further detail.

[0034] The embodiment of the present application discloses a soil reinforcement process for a pipe-jacking well opening on a soft soil foundation. refer to figure 1 , a soil reinforcement process for pipe jacking well openings on soft soil foundations comprises the following steps:

[0035] S1. When pouring the concrete construction enclosure 4 for the pipe jacking well 1, reserve the designed pipe jacking well opening 3 and a gap for reinforcement of the soil body 2 around the pipe jacking well opening, and pre-embed steel bars along the side wall of the gap;

[0036] S2. Mark out the pipe jacking well opening 3, and tamp the soil 2 around the pipe jacking well opening toward the direction of pipe jacking. The range of soil compaction includes the left side 2-3m of the pipe jacking well opening 3 and the right side 2- For the soil within 3m, within 2-3m on the upper side, and from t...

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Abstract

The invention relates to the technical field of pipe-jacking construction, in particular to a pipe-jacking well opening soil body reinforcing process for a soft soil foundation, and relates to the technical field of pipe jacking construction. Soil bodies around the pipe-jacking well opening are reinforced by two ways: tamping and compaction grouting. In the tamping step, the soil bodies around a pipe jacking well opening are tamped in the advancing direction of a jacking pipe, and then a pit left after tamping is filled and leveled up with soil, then the next round of tamping is conducted, and soil filling and tamping are conducted circularly till the condition of stopping circulation is met. The method has the effect of improving the defects of long construction period, high cost and low tunneling efficiency when a pipe jacking machine goes in and out of the opening of the pipe jacking well.

Description

technical field [0001] The present application relates to the technical field of pipe jacking construction, in particular to a soil reinforcement process for pipe jacking well openings on soft soil foundations. Background technique [0002] At present, the entrance and exit operation in pipe jacking construction is a very important task. Its safety and reliability must be fully considered during construction, especially when the pipe jacking machine passes through the hole in the pipe jacking well. If the pipe jacking machine can safely , Reliably and smoothly through the hole, then it can be said that the pipe jacking construction has been half successful. In the traditional construction method where the pipe jacking machine passes through the hole of the pipe jacking well, three-axis stirring piles, high-pressure jet jetting piles, and freezing methods are generally used to strengthen the soil outside the hole to ensure the strength of the soil outside the hole and the wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/046E02D3/10E02D3/12E02D31/02
CPCE02D3/046E02D3/10E02D3/12E02D31/02
Inventor 田守伟王涛黎向平李思威吕桥
Owner 广东一新长城建筑集团有限公司
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