Vertical prestressing force opening mud jacking construction method and construction device

A technology of vertical prestressing and construction methods, which is applied in the direction of construction, building structure, and building material processing, etc., and can solve the problems of uncompacted tops of vertical prestressing tunnels, so as to save grouting pipe materials and construction costs , reduce artificial effects

Inactive Publication Date: 2008-04-23
CHINA CONSTR SEVENTH ENG DIVISION CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

③Solve the non-compact defect at the top of the vertical prestressed tunnel

Method used

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  • Vertical prestressing force opening mud jacking construction method and construction device
  • Vertical prestressing force opening mud jacking construction method and construction device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Compared with the traditional technology, the core of the present invention cancels the grouting pipe, and changes the anchor backing plate on the top into an iron casting, and directly sets a grouting hole on the iron casting. The steps of the grouting construction method for vertical prestressed channels of the present invention are as follows: for vertical prestressed pipelines, each channel is subjected to secondary grouting according to the procedure of gravity flow first, then low pressure and finally high pressure, and the grouting from top to bottom is adopted. Direction, specific steps; A. Gravity flow is the first choice for grouting for the first time, the time is 5 minutes, and low pressure control is adopted when the vent hole is vented, the pressure is controlled at 0.1MPa, and the time is controlled at 3 minutes; B. The exhaust pipe is blocked, and the second grouting is started, and the pressure is controlled at 0.3MPa until the slurry is full; C. Finally...

Embodiment 2

[0030] The steps of the grouting construction method for the vertical prestressed channel of the present invention are as follows: for the vertical prestressed pipeline, each channel is subjected to secondary grouting according to the procedure of gravity flow first, then low pressure and finally high pressure, and the method from top to bottom is adopted. Grouting direction, specific steps; A. Gravity flow is the preferred method for the first grouting, the time is 5.2 minutes, low pressure control is adopted when the vent hole is vented, the pressure is controlled at 0.12MPa, and the time is controlled at 3.2 minutes; B. 1. Block up the exhaust pipe, start the second grouting, and control the pressure at 0.31MPa until the slurry is full; C. Finally, erect the exhaust pipe so that its height is higher than that of the bellows.

[0031] The construction equipment of the vertical prestressed tunnel grouting construction method of the present invention: the construction equipment...

Embodiment 3

[0034] The steps of the grouting construction method for the vertical prestressed channel of the present invention are as follows: for the vertical prestressed pipeline, each channel is subjected to secondary grouting according to the procedure of gravity flow first, then low pressure and finally high pressure, and the method from top to bottom is adopted. Grouting direction, specific steps; A. Gravity flow is the preferred method for the first grouting, the time is 5.3 minutes, low pressure control is adopted when the vent hole is vented, the pressure is controlled at 0.13MPa, and the time is controlled at 3.3 minutes; B. 1. Block up the exhaust pipe, start the second grouting, and control the pressure at 0.32MPa until the slurry is full; C. Finally, erect the exhaust pipe so that its height is higher than that of the bellows.

[0035] The construction equipment of the vertical prestressed tunnel grouting construction method of the present invention: the construction equipment...

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Abstract

The present invention discloses construction process and apparatus for extruding mortar to vertical prestressed hole canal. The twice mortar extruding process includes the following steps: 1. the first mortar extruding including the first gravitational flowing and the subsequent low pressure extruding after some mortar begins bursting out through the exhaust hole; 2. blocking the exhaust hole, and extruding mortar for the second time until reaching fullness; and 3. erecting the exhaust pipe for it to become higher than the corrugated pipe. The construction apparatus includes one upper anchoring back plate with mortar extruding hole canal. The present invention has the advantages of no jamming of mortar extruding hole, saving in mortar extruding pipe material, low cost, etc.

Description

technical field [0001] The invention relates to a building construction method and equipment, in particular to a vertical prestressed tunnel grouting construction method and construction equipment. Background technique [0002] At present, the traditional vertical prestressed tunnel grouting technology adopts pre-embedded grouting pipes, which are buried at the bottom of the tunnel (see Figure 1). Traditional technology has the following disadvantages: [0003] ①Because the grouting pipe is pre-buried, concrete construction often leads to blockage of the grouting pipe, which seriously affects the subsequent grouting process. [0004] ②The grouting pipe is pre-buried at the bottom of the tunnel, which increases the material of the grouting pipe and increases the construction cost. [0005] ③The grouting pipe is pre-buried at the bottom of the tunnel. This process increases a lot of labor, prolongs the construction period and increases the construction cost. [0006] ④ Due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/00
Inventor 焦安亮吕福杰肖必建胡社新徐发祥黄延铮
Owner CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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