CN1346000A

CN1346000A - High-pressure side-spraying reinforcing method for defect in foundation pile

Info

Publication number: CN1346000A
Application number: CN 00123919
Authority: CN
Inventors: 曾昭礼
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-27
Filing date: 2000-09-27
Publication date: 2002-04-24

Abstract

The present invention discloses a mechanical method to sink high-pressure slurry pipe close to the pile side, and a high-pressure directional and sectional gunite are used to spray high-strength setting cement slurry to form high-strength thickened disk-expanded body enclosing the pile in the enough range from top to bottom so as to radically solve the engineering hidden danger demage which can be resulted from pile breakage, neck reduction and virtual soil of pile foundation in the building construction.

Description

High-pressure side-spraying reinforcing method for defect in foundation pile

The invention discloses a kind of foundation pile defective processing and means to save the situation, belong to civil construction project pile foundation technology field.

The various pile foundations of a large amount of uses of civil construction project at present, but nearly all up to now various pile construction technologies all unavoidably have foundation pile engineering defect such as broken pile, serious necking down, stake end loosened soil, because of these defectives are difficult to composite reinforcing at deep under ground, usually cause foundation pile or pile foundation engineering to be scrapped; Even these defectives take other to remedy as adding measures such as stake, top off-load nearby, also be that expense costliness, construction are complicated, the construction work duration is spun out significantly; What have then limits at all and can't handle and remedy because of engineering specifications, so the processing of foundation pile engineering defect is the difficult problem that at present domestic and international pile foundation engineering is badly in need of solution.

The objective of the invention is problem, and a kind of high-pressure side-spraying strong method of foundation pile defective is provided at above-mentioned prior art existence.

For achieving the above object, the present invention is achieved in that a kind of high-pressure side-spraying reinforcing method for defect in foundation pile, be in stake side near defective foundation pile, adopt mechanical means that the high-pressure mortar spraying pipe is sunk to desired depth, bilateral or the fan-shaped high pressure jet grouting of one-sided orientation in the upper and lower scope that needs reinforcement of foundation pile defective, slurries are in the infiltration of foundation pile defective respective range inner high voltage, mixing and form partial high pressure whitewashing complex, form at last to have high-intensity expansion supporting disk body entity.

The mechanical means that above-described down immersed tube adopts have boring method under manage, vibratory drilling method immersed tube and squeeze into method immersed tube etc.

Adopt said method, cutting by high pressure jet grouting, mix, be pressed into infiltration, solidify, effect such as enhancing, carry out the substantial broken pile crack of high pressure high-strength cement slurry, squeegee at broken pile or serious necking down rejected region, and in the upper and lower enough scopes of foundation pile fault location, form the high-strength cement soil overstriking expansion disk body that wraps up stake, remedied the mass defect of foundation pile effectively.

Foundation pile reinforcement of the present invention, because the fault location at foundation pile has formed one section cement overstriking expansion disk body, not only remedied the mass defect of foundation pile broken pile or serious necking down, and increased the reinforcement pile cutoff the stake side-friction force, also be equivalent to simultaneously enlarge stake directly in the pile body part, from pile foundation " waist " or stake increase at an end and expansion supporting disk body, thereby increased substantially the vertical bearing capacity of foundation pile; The present invention has fundamentally solved hidden dangers in project and harm that civil construction project foundation pile broken pile, necking down, stake end loosened soil bring, captured the foundation pile defect remedying difficult problem of long-term puzzlement civil construction project circle, this method also has easy construction, advanced technology, the strong reliable in quality of an inferior horse, the foundation pile supporting capacity is improved largely than former design foundation pile supporting capacity, can reduce more than the expense 50%-80% than other used in the past meanss to save the situation simultaneously, duration shortens 2/3rds with first-class advantage, has bigger social benefit and significant technology, economic benefit.

Below in conjunction with drawings and Examples the present invention is explained in detail.

Fig. 1 is construction process figure of the present invention.

Maybe need the major defect remedied when measuring certain foundation pile generation broken pile, in the time of will remedying with reinforcement reparation of the present invention, its construction sequence as shown in Figure 1, to determine that the cement based of time solidification is that main gunite material is seated in the slurry mixer 1 by requirement of engineering, after adding the interpolation auxiliary agent, begin to stir, the slurry stream that mixes after stirring is filtered through filter 2, the qualified slurries that filter out enter high pressure pump 3, operating console 4 is controlled the spray pressure and the whitewashing amount of high pressure pump 3, stake side at defective foundation pile 7 sinks to desired depth with 5 borings of immersed tube machinery and with high-pressure mortar spraying pipe 6, open high pressure pump 3, operating console 4, make high-pressure mortar spraying pipe 6 in the directed whitewashing of fault location, support disk body with the expansion that forms stake end reinforcing body 8 and fault location reinforcing body 9, thereby make the defective of defective foundation pile 7 obtain remedying, guaranteed construction quality.

Claims

1, a kind of high-pressure side-spraying reinforcing method for defect in foundation pile, it is characterized in that: in stake side near defective foundation pile, adopt mechanical means that the high-pressure mortar spraying pipe is sunk to desired depth, bilateral or the fan-shaped high pressure jet grouting of one-sided orientation in the upper and lower scope that needs reinforcement of foundation pile defective, slurries form a partial high pressure whitewashing complex in the infiltration of foundation pile defective respective range inner high voltage, a mixed side that is incorporated in, and form at last to have high-intensity expansion supporting disk body entity.

2, high-pressure side-spraying reinforcing method for defect in foundation pile according to claim 1 is characterized in that: the mechanical means that following immersed tube adopts have boring method under manage, vibratory drilling method immersed tube and squeeze into method immersed tube etc.