CN1157873A

CN1157873A - Straightening method for inclined house on soft ground foundation

Info

Publication number: CN1157873A
Application number: CN 96113492
Authority: CN
Inventors: 林礼
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-31
Filing date: 1996-12-31
Publication date: 1997-08-27
Anticipated expiration: 2016-12-31
Also published as: CN1078651C

Abstract

A method for correcting inclined building on soft foundation includes such steps as mass calculation, setting up reinforcing piles, drilling inclination correcting wells, excavating to force settling, backfill and tamping, and anchorage of reinforcing piles, and features high correcting quality and speed as the soft foundation is compacted by bearing layer formed during correction.

Description

Antidote behind the inclined building on the soft foundation

The present invention relates to the antidote behind the inclined building on a kind of soft foundation.

It also is method at the correcting and then reinforcing behind the inclined building on the soft foundation that CN1058069A discloses a kind of, it is at the little sidetracking some of tilting building sedimentation and the suction eye of the degree of depth, take out the water that from the weak soil layer, is extruded out that accumulates in the hole with submersible pump repeatedly, make the weak soil of substrate fixed by densification, reach the sedimentation unanimity, stamp around then in the house and reinforce stake, make it that sedimentation no longer take place.Obviously, this method has been ignored 2 points: the one, and in the process of boring suction eye, ignored the big side of tilting building sedimentation and still continued sedimentation; The 2nd, ignored the influence of the bearing stratum under the basis (crust layer) to the correction process, in addition, adopt drainage to rectify a deviation, process is longer.

The objective of the invention is provides a kind of correction quality height, the antidote that straightening speed is fast for the tilting building on the soft foundation.

This method is made up of following steps:

One, a variety of causes of analysis-by-synthesis inclined building is measured tilt quantity, calculates the casting amount of correcting;

Two, in the big side of building settlement amount the reinforcing stake is set along position, the basic edge of a wing, be provided with along position, the basic edge of a wing in other little each side of building settlement amount then and reinforce stake, and the density of the reinforcing stake of the big side of building settlement amount is greater than the density of the reinforcing stake of other little each side of building settlement amount;

Three, in little each side of building settlement amount along edge of foundation, by the deep mixed correction well point of how much boring of casting amount, the density of correction well point should be enough to make bearing stratum to produce shear strain, and causes the deep layer weak soil to produce rheology and creep;

Four, from correction discharges of directly fetching earth the well point, force each little side group plinth of building settlement amount together with bearing stratum to the counter-rotation that tilts, the correction of multimetering simultaneously value, the casting amount of well point of respectively rectifying a deviation of adjustment at any time prevents the house torsional deformation;

Five, when the rectification degree reaches permissible value, stop the casting of holing immediately, and rapidly to each correction well point backfill filler, and the shake puddling is real, stops flowing and wriggling of deep layer weak soil.

Six, when the rectification degree value of touching the mark, with the reinforcing stake around the basis with basic anchoring.

The characteristics of above-mentioned antidote are:

One, at first ground has been taked reinforcement measure before the rectification, strengthened the bearing capacity of foundation, prevented the further inclination in house, made the big side of building settlement amount become the firm fulcrum of rectifying a deviation in rotating simultaneously.

Two, after the bearing stratum shear, house and basis are rotated with bearing stratum and corrected, and be little to the house quality influence, the correction quality height, and simultaneously, the deep layer weak soil is subjected to the large tracts of land extruding of bearing stratum, and stress increases, and causes mud rheology and creep rapid, and straightening speed is exceedingly fast.

Three, taked the measure of backfill correction well point after the rectification rapidly, can effectively prevent flowing and wriggling of deep layer weak soil, and preformed reinforcing stake, anchoring rapidly again, buffering inertia in the balance correcting process, therefore, this method is not only corrected soon, and can make the house promptly become stable at short notice.

Illustrate particular content of the present invention below in conjunction with drawings and Examples.

Fig. 1: the plan view of house, basis, reinforcing stake and correction well point;

Fig. 2: house east elevation figure;

Fig. 3: rectification rate of settling figure.

Embodiment is four floor rooms, brick mix structure, and steel bar concrete banding pattern basis, slope is 2.36% after measured, and tiltangle is 1.352 °, and vertical error is 295MM, and the terrace differential settlement is 207MM.

Calculate by following simplified formula according to step 1, rectification casting amount:

V = \frac{A . B . Δ_{2}}{2}

In the formula: V-casting amount (M ³)

The long limit size (M) in A-basis

B-basis minor face size (M)

Δ ₂-terrace differential settlement (M)

The A=29.85M of present embodiment

B＝10.75M

Δ ₂＝0.207M

V=33.21M as calculated ³

According to step 2, along the distribution of the reinforcing stake 1 on the basic edge of a wing as shown in Figure 1, wherein the spud pile of the side that the building settlement amount is big at first is provided with, the reinforcing stake 1 of each side that the building settlement amount is little is provided with then, and the density of the reinforcing stake 1 of the big side of building settlement amount is greater than the density of the reinforcing stake 1 of each little side of building settlement amount.

According to step 3, along the distribution of the correction well point 2 of edge of foundation as shown in Figure 1, the little place of settling amount, the casting amount is then many, the degree of depth of correction well wants dark, is noted that the density of correction well point should be enough to make bearing stratum to produce shear strain, and causes the deep layer weak soil to produce rheology and creep.

According to step 4, adopt the casting of fetching earth of facility such as the people tries hard to recommend rig, total casting amount of each well point of rectifying a deviation is with less than 33M ³Come strict control for standard, must not exceed, the key of this step is a multimetering correction value, whether the correction value of observing each point is synchronous, as occur will in time adjusting position, the degree of depth and the casting speed of correction well point 2 unusually, make the house to the opposite direction normal rotation that tilts.

According to step 5, when the degree of correcting when the house reaches permissible value, should prevent flowing and wriggling of deep layer weak soil immediately, its measure is to stop the casting of holing, and rapidly to correction well point 2 backfill fillers, and the shake puddling is real, and this job requirement was assaulted in one hour and is finished.Best filler is the sand rubble of slag or 2: 1, and after the backfill, the house is corrected will enter the inertia phase buffer.

According to step 6, when the degree of correcting when the house reaches standard value, should prevent the rectification inertia in house immediately, its measure be with along the reinforcing stake 1 on the basic edge of a wing with basic anchoring.The method of anchoring is to pour into high-intensity concrete to reinforcing the gap location that stake 1 reserves between with the basis, also need mix in case of necessity and urge agent with fixed attention an amount of morning by force.

Fig. 3 has write down the correcting process of present embodiment, as shown in the figure, and from beginning drilling well forced landing, to finishing the casting task substantially, the about 18CM of settling amount, the time only needs five days, adds the inertia phase buffer, also only ten days time, straightening speed is very fast, and by inspection, the slope after the rectification only is 1.2 ‰, vertical error only is 15MM, less than standard value 38MM.

Claims

1, the antidote behind the inclined building on a kind of soft foundation is characterized in that: be made up of following steps:

Two, in the big side of building settlement amount reinforcing stake (1) is set along position, the basic edge of a wing, be provided with along position, the basic edge of a wing in other little each side of building settlement amount then and reinforce stake (1), and the density of the reinforcing stake (1) of the big side of building settlement amount is greater than the density of the reinforcing stake (1) of other little each side of building settlement amount;

Three, in little each side of building settlement amount along edge of foundation, by the deep mixed correction well point (2) of how much boring of casting amount, the density of correction well point (2) should be enough to make bearing stratum to produce shear strain, and causes the deep layer weak soil to produce rheology and creep;

Four, discharges of from correction well point (2), directly fetching earth, force each little side group plinth of building settlement amount together with bearing stratum to the counter-rotation that tilts, the correction of multimetering simultaneously value, the casting amount of well point (2) of respectively rectifying a deviation of adjustment at any time prevents the house torsional deformation;

Five, when the rectification degree reaches permissible value, stop the casting of holing immediately, and rapidly to each correction well point (2) backfill filler, and the shake puddling is real, stops flowing and wriggling of deep layer weak soil.

Six, when the rectification degree value of touching the mark, with the reinforcing stake (1) around the basis with basic anchoring.