阅读说明：本技术 一种复合地基建筑物褥垫层取土迫降纠倾方法 (Method for correcting inclination of composite foundation building by taking soil from mattress layer and forcing to land ) 是由 郭道通 王清朋 孙剑平 高翔 王军 孙伟杰 杨凡 于 2019-09-20 设计创作，主要内容包括：本发明涉及一种复合地基建筑物褥垫层取土迫降纠倾方法,在建筑物沉降值相对较小区域的基础上钻竖向孔,竖向孔穿过褥垫层至设定深度,对褥垫层所对应的竖向孔孔壁部分进行射流扰动,竖向孔外周的褥垫层部分发生松散塌落,使其承载能力被削弱,褥垫层的土颗粒落入竖向孔,取出落入竖向孔的褥垫层土颗粒,褥垫层的承载能力被削弱迫使建筑物向沉降较小的区域回倾,建筑物倾斜度满足要求后,对竖向孔及褥垫层的间隙进行注浆封填,本发明的纠倾方法可靠有效、简单易行、工期短,施工成本低。(The invention relates to a soil-taking forced-landing rectification method for a mattress layer of a composite foundation building, which is characterized in that a vertical hole is drilled on the basis of a region with a relatively small sedimentation value of the building, the vertical hole penetrates through the mattress layer to a set depth, jet flow disturbance is carried out on the wall part of the vertical hole corresponding to the mattress layer, the mattress layer part at the periphery of the vertical hole is loosened and collapsed, the bearing capacity of the mattress layer is weakened, soil particles of the mattress layer fall into the vertical hole, the mattress layer soil particles falling into the vertical hole are taken out, the bearing capacity of the mattress layer is weakened, the building is forced to be backwards inclined towards the region with small sedimentation, and grouting and sealing are carried out on the gap between the vertical hole and the mattress layer after the inclination of the building meets the requirement.)

1. The utility model provides a compound ground building mattress layer soil sampling compels to descend rectification method which characterized in that, bore vertical hole on the regional basis that the value of building subsides is less relatively, vertical hole passes mattress layer to the settlement degree of depth, carry out the efflux disturbance to the vertical hole pore wall part that mattress layer corresponds, mattress layer part of vertical hole periphery takes place loose slump, make its bearing capacity weakened, the soil granule of mattress layer falls into vertical hole, take out the mattress layer soil granule that falls into vertical hole, mattress layer's bearing capacity is weakened and is compelled the building to fall back to the region that the value of subsides is less relatively, building gradient satisfies the back of requirement, carry out the slip casting and seal the packing to vertical hole and the clearance of mattress layer.

2. The composite foundation building mattress layer soil taking forced landing rectification method of claim 1, wherein the jet flow disturbance comprises a first jet flow disturbance and a second jet flow disturbance which are sequentially carried out, and the jet flow rate of the first jet flow disturbance is 20m³/h-35m³The jet pressure is 0.8MPa to 1.2MPa, the jet flow of the second jet disturbance is 45L/min to 100L/min, and the jet pressure is 15MPa to 25 MPa.

3. The composite foundation building mattress layer soil taking and forced landing rectification method of claim 1, wherein the distance between the bottom surface of the vertical hole and the bottom surface of the mattress layer is 2-3 times the thickness of the mattress layer.

4. The method as claimed in claim 1, wherein the vertical holes are formed by vertically drilling along the direction from the region with relatively small settlement value to the region with relatively large settlement value.

5. The composite foundation building mattress layer soil-taking forced-landing rectification method of claim 1, wherein the distribution density of the vertical holes is gradually reduced along the direction from the area with relatively small settlement value to the area with relatively large settlement value of the building.

6. The composite foundation building mattress layer soil-taking forced landing rectification method of claim 1, wherein the vertical holes are equally spaced from the axes of the plurality of adjacent vertical reinforcements.

7. The composite foundation building mattress layer soil taking and forced landing rectification method of claim 1, wherein soil taking work is simultaneously performed on the vertical hole disturbed by jet flow and the adjacent vertical holes when mattress layer soil particles falling into the vertical hole are taken out.

8. The composite foundation building mattress layer soil-taking forced landing rectification method as claimed in claim 1, wherein jet flow disturbance of the wall of the vertical hole and work of taking out soil particles in the vertical hole are performed for a plurality of times of cyclic operation until the building tilts back until the inclination reaches the requirement.

9. the composite foundation building mattress layer soil taking forced landing rectification method of claim 1, wherein the inclination and settlement value of the building are monitored in real time during the vertical hole drilling, jet flow disturbance on the wall of the vertical hole and soil taking operation in the vertical hole.

10. The method for rectifying the soil taking and forced landing of the mattress layer of the composite foundation building as claimed in claim 1, wherein before the vertical hole is drilled, the auxiliary facilities connected with the building to be rectified are cut off in advance, and after the building is reset, the cut-off parts are restored to be connected and reinforced.

Technical Field

The invention relates to the technical field of inclination correction and reinforcement of civil construction, in particular to a method for correcting inclination of a composite foundation building by taking soil from a mattress layer and forcing the soil to descend.

Background

The building inclination correction means that the building is inclined because the foundation is not uniformly settled due to a foundation or some reason of the building, and the upper structure of the building deviates from the vertical position, and when the inclination degree of the building exceeds the national relevant standard requirements, the safety and normal use of the building are seriously influenced, and the measures of inclination correction, strengthening and stabilization are adopted to ensure the safety of the building and recover the normal use function of the building.

for shallow foundation buildings on natural foundations, common methods of rectification are: stacking loading pressurization inclination correction method, sandstone inclination correction method, water immersion inclination correction method, sandstone irrigation method and the like. When the design load of a building is large, the height is high, and the bearing capacity of a natural foundation cannot meet the requirement of the bearing capacity of the building, a pile foundation is usually adopted or foundation treatment is carried out on the original foundation.

The inventor finds that for the composite foundation building with the vertical reinforcement to rectify the inclination, because the composite foundation is that the vertical reinforcement and the foundation provide bearing capacity in coordination, the disturbance vertical reinforcement can not effectively achieve the effect of weakening the bearing capacity of the composite foundation, and in the actual construction process, the pile position and the pile length record of the composite foundation often have larger deviation with the field situation, the positioning of the vertical reinforcement is difficult, when the underground water level is higher, the excavation rectification working ditch is adopted or the radiation well is arranged to carry out horizontal disturbance, the water is often needed to be reduced, the building can be caused to subside again, when the rectification amount of the building is larger, the rectification construction period is long, and the engineering cost is high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a mattress layer soil taking forced landing rectification method for a composite foundation building, which is not influenced by a composite foundation reinforcement and is suitable for rectification of various composite foundation buildings.

In order to achieve the purpose, the invention adopts the following technical scheme:

The utility model provides a compound ground building mattress layer soil sampling compels to fall rectification method, bore vertical hole on the basis of the relatively less region of building value of subsiding, vertical hole passes mattress layer to the settlement degree of depth, carry out the efflux disturbance to the vertical hole pore wall part that mattress layer corresponds, mattress layer part of vertical hole periphery takes place loose slump, make its bearing capacity weakened, the soil granule of mattress layer falls into vertical hole, take out the mattress layer soil granule that falls into vertical hole, mattress layer's bearing capacity is weakened and is compelled the building to fall back to the relatively less region of value of subsiding, after the building gradient satisfies the requirement, carry out the slip casting and seal the packing to the clearance of vertical hole and mattress layer.

Furthermore, the jet flow disturbance comprises a first jet flow disturbance and a second jet flow disturbance which are sequentially carried out, and the jet flow rate of the first jet flow disturbance is 20m³/h-35m³The jet pressure is 0.8MPa to 1.2MPa, the jet flow of the second jet disturbance is 45L/min to 100L/min, and the jet pressure is 15MPa to 25 MPa.

Further, the distance between the bottom surface of the vertical hole and the bottom surface of the mattress layer is 2-3 times of the thickness of the mattress layer.

Further, vertical drilling is sequentially carried out along the direction from the area with the relatively small settlement value of the building to the area with the relatively large settlement value, and vertical holes are formed.

Further, the distribution density of the vertical holes is gradually reduced along the direction from the area with the relatively small settlement value of the building to the area with the relatively large settlement value of the building.

Further, the vertical holes are spaced from the axes of the adjacent vertical reinforcements by the same distance.

Furthermore, when the mattress soil particles falling into the vertical holes are taken out, soil taking work is carried out on the vertical holes disturbed by the jet flow and the adjacent vertical holes simultaneously.

And further, carrying out repeated circulating operation on jet flow disturbance of the wall of the vertical hole and the work of taking out soil particles in the vertical hole until the building tilts back to reach the inclination degree meeting the requirement.

Furthermore, the inclination and settlement value of the building are monitored in real time during the processes of drilling the vertical hole, carrying out jet flow disturbance on the wall of the vertical hole and borrowing soil in the vertical hole.

Furthermore, before the vertical hole is drilled, the auxiliary facilities connected with the building to be corrected are cut off in advance, and after the building is reset, the cut-off parts are restored to be connected and reinforced.

The invention has the beneficial effects that:

1. The inclination correcting method is reliable, effective, simple and feasible, short in construction period and low in construction cost, jet flow disturbance is carried out on the wall part of the vertical hole corresponding to the mattress layer instead of the vertical reinforcement, the defect of poor effect of directly disturbing the vertical reinforcement is overcome, and meanwhile, the uncertain risk of buildings caused by rainfall required by excavation of working ditches is avoided.

2. The inclination correcting method only carries out jet flow disturbance on the mattress layer, does not influence the upper structure of a building and the foundation below the mattress layer, does not change the bearing capacity of the composite foundation, and has small risk.

3. The inclination correction method is not influenced by the types of foundation soil and the material of the foundation reinforcement, and is suitable for the inclination correction of various composite foundation buildings.

drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is an elevation view of a building prior to rectification;

FIG. 2 is a schematic diagram of the first jet disturbance in example 1 of the present invention;

FIG. 3 is a schematic plan view of a first jet disturbance in example 1 of the present invention;

FIG. 4 is a schematic diagram of a first jet perturbation axial measurement in accordance with embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a second jet disturbance and vertical hole borrowing in example 1 of the present invention;

FIG. 6 is a schematic plan view of a second jet disturbance in example 1 of the present invention;

FIG. 7 is a schematic diagram of a second jet perturbation axial measurement in accordance with embodiment 1 of the present invention;

FIG. 8 is an elevation view of a building after rectification is completed in embodiment 1 of the present invention;

The high-pressure soil sampling and drilling machine comprises a building 1, a raft 2, a mattress layer 3, a vertical reinforcement 4, a vertical hole 5, a first boundary 6, soil particles 7, a second boundary 8, a high-pressure jet flow device 9 and a soil sampling and drilling machine 10.

Detailed Description

it should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

it is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

As introduced in the background art, in the existing rectification method, the effect of disturbing the vertical reinforcement of the composite foundation is poor, the vertical reinforcement is difficult to position, the excavation of a rectification working ditch or the arrangement of a radiation well is easy to cause the secondary settlement of the building, the construction period is long, and aiming at the problems, the application provides the soil taking and forced landing rectification method for the mattress layer of the composite foundation building.

In example 1, which is a typical embodiment of the present application, as shown in fig. 1, a vertical reinforcement is buried in foundation soil, a mattress layer 3 and a foundation are provided between a vertical reinforcement 4 (e.g., a CFG pile) and a building 1, the foundation is a raft 2, a right settlement value of the building is relatively large, a left settlement value of the building is relatively small, the building inclines to the right, and the inclination angle of the building exceeds a standard value, and thus rectification is required. A method for correcting inclination of composite foundation building by forced landing of mattress layer features that before correcting inclination, the auxiliary facilities such as skirt house and underground garage connected to the building to be corrected are cut off in advance. In particular, mechanical devices are used to cut reinforced concrete (e.g., beams, floors, foundation slabs) connected to buildings and ancillary facilities.

Utilize drilling equipment to set up a plurality of vertical holes 5 on the raft area in the area that the value of subsiding is less relatively of building, along the relatively less region of the value of subsiding to the relatively great regional direction of the value of subsiding (from left to right direction), bore a plurality of vertical holes in proper order, the distribution density of vertical hole reduces gradually. The distribution density of the vertical holes can be set according to actual working conditions, and is not described in detail herein.

The vertical hole axis is equal to the distance between the adjacent vertical reinforcement axes, and in this embodiment, the vertical hole is equal to the distance between the vertical hole axis and the adjacent three vertical reinforcements. The vertical reinforcement and the foundation soil can be stressed uniformly.

The vertical hole penetrates through the raft plate and the mattress layer to a set depth in foundation soil, and the distance between the bottom surface of the vertical hole and the bottom surface of the mattress layer is 2-3 times of the thickness of the mattress layer.

after the vertical hole drilling is completed, jet flow disturbance work is carried out on the wall of the vertical hole corresponding to the mattress layer, specifically, as shown in fig. 2-4, a large-flow water jet nozzle of a large-flow water supply device (such as a high-power water pump) is placed into the vertical hole, the water jet nozzle of the large-flow water jet device extends into the depth range of the mattress layer, the large-flow water supply device is started, and water flow passes through the large-flow water jet nozzle and is 20m³/h-35m³Flow rate of/h and water pressure of 0.8MPa-1.2MPa are horizontally jetted to the vertical hole corresponding to the mattress layerThe first jet flow disturbance is carried out on the hole wall, the mattress layer at the periphery of the vertical hole is gradually loosened under the disturbance of water flow, pores are formed among soil particles of the mattress layer, the loosening range of the mattress layer reaches a first boundary 6, the mattress layer is loosened and collapsed, partial soil particles fall to the bottom of the vertical hole, after the first jet flow disturbance is finished, a large-flow water spray head of a large-flow water supply device is taken out, then a high-pressure jet flow spray head of a high-pressure jet flow device is placed into the vertical hole, as shown in figures 5-7, the high-pressure jet flow spray head reaches the depth range corresponding to the mattress layer, the high-pressure jet flow device 9 (such as a high-pressure pump) is started, the water flow is horizontally sprayed to the hole wall of the vertical hole corresponding to the mattress layer through the high-pressure jet flow spray head at the water pressure of 15MPa-25MPa and the flow rate of 45L/min-100L/min for second jet flow, and a part of soil particles fall into the vertical holes, and a part of soil particles flow into the adjacent vertical holes along the pores of the mattress layer along with high-pressure water flow, and the disturbance range of the second jet flow disturbance can reach the second boundary 8.

After the second jet flow disturbance is completed, the soil particles 7 at the bottom of the vertical hole subjected to the jet flow disturbance and the adjacent vertical hole are taken out by using a soil sampling drilling machine 10, and soil sampling work of the vertical hole is performed.

when jet flow disturbance and soil taking work are carried out, the mattress layer part of the area on the side with the relatively small sedimentation value of the building collapses loosely and soil particles are taken out, the building gradually compacts the pores in the mattress layer under the action of self-weight load, and the inclined building sinks and gradually tilts towards the side with the relatively small sedimentation value.

When the vertical hole is drilled, jet flow disturbance and the vertical hole soil sampling work is carried out, the inclination and the settlement value of the building are monitored in real time and are compared with the target value for correcting the inclination in time, if the target value is not reached, the jet flow disturbance and the soil sampling work are subjected to repeated circulation operation until the inclination of the building meets the target requirement.

and after the building is reset, pouring cement mortar into the vertical hole and the hole of the mattress layer for sealing and filling, and recovering the bearing capacity of the composite foundation. The rectified building is shown in fig. 8.

And after the building is corrected, restoring connection of the cut-off part of the building and the accessory facilities after the settlement monitoring data reaches the stable standard.

In this embodiment, along the relatively less regional direction of the relatively great regional direction of value of settling, bore in proper order and get vertical hole, and the distribution density in vertical hole reduces gradually, and efflux disturbance and vertical hole borrowing work carry out the back, and the bearing capacity of the relatively less regional mattress bed course of value of settling is less than the bearing capacity of the relatively great regional mattress bed course of value of settling, is favorable to the building to fall back under the effect of dead weight load.

In this embodiment, the distance between vertical hole bottom surface and mattress pad layer bottom surface is 2-3 times of mattress pad layer thickness, both can guarantee that the soil granule can fall into vertical downthehole behind the efflux disturbance, and the cement mortar use amount when can furthest reducing later stage pouring cement mortar again reduces construction cost, again can the biggest work of the drilling machine of conveniently getting soil again.

The inclination correction method is reliable, effective, simple and easy to implement, short in construction period and low in construction cost, jet flow disturbance is carried out on the wall part of the vertical hole corresponding to the mattress layer instead of the vertical reinforcement, the defect of poor effect of directly disturbing the vertical reinforcement is overcome, the uncertain risk brought to a building due to the fact that the water needs to be lowered when a working ditch is excavated is avoided, jet flow disturbance is carried out only on the mattress layer, the upper structure of the building cannot be affected and the foundation below the mattress layer cannot be affected, the bearing capacity of the composite foundation cannot be changed, the risk is small, and the inclination correction method is suitable for inclination correction of various composite foundation buildings.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.