CN113482062B - Anti-floating remedy assembly for existing basement and construction method thereof - Google Patents
Anti-floating remedy assembly for existing basement and construction method thereof Download PDFInfo
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- CN113482062B CN113482062B CN202110724638.XA CN202110724638A CN113482062B CN 113482062 B CN113482062 B CN 113482062B CN 202110724638 A CN202110724638 A CN 202110724638A CN 113482062 B CN113482062 B CN 113482062B
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- steel strand
- bearing anchor
- foundation
- anchor rod
- fixed
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
Abstract
The invention relates to an existing basement anti-floating remediation assembly, which comprises a basement foundation and a pile foundation, wherein the basement foundation comprises a middle span area and a support area, the bottom of the support area is fixedly connected with the pile foundation, and the basement foundation further comprises a pre-tightening force tensioning and anchoring device which conducts buoyancy of the middle span area to the support area.
Description
Technical Field
The invention relates to the technical field of basement bottom plate construction, in particular to an anti-floating remedy component for an existing basement and a construction method thereof.
Background
Regarding to chinese patent CN202011441696.3, it discloses an anti-floating anchor rod and basement floor construction method, including: the anchor rod body, the prestressing force steel strand wires and the anchor device of locating in the anchor rod body along the length direction of the anchor rod body. The lower end of the anti-floating anchor rod is buried in the ground, the upper end of the anti-floating anchor rod extends to the ground and is used for constructing a bottom plate area of the basement, and the stretching end of the prestressed steel strand extends out of the top end of the anchor rod body and then extends into the bottom plate area. The anchoring device is arranged in the bottom plate area and is connected with the top end of the anchor rod body, the prestressed steel strand penetrates through the anchoring device to be anchored and fixed after the prestressed steel strand is tensioned, and then the tensioning force of the tensioned prestressed steel strand is maintained. The stretching end of the anti-floating anchor rod is completely embedded in the basement bottom plate and is fixedly integrated with the basement bottom plate, so that the basement bottom plate is high in construction efficiency, good in forming quality, high in attractiveness and convenient and comfortable to use, and the hidden danger of water leakage cannot exist;
however, the anchor rod is applied to the basement of a newly-built building, and along with the fact that the basement of the newly-built building is built deeper and deeper, the deeply-dug basement is inevitably affected by the underground water level, and particularly, the basement foundation is easy to deform, crack, seep water and other diseases under the direct action of high pressure (underground water), so that the safety and the normal use of the structure are affected. For the above-mentioned diseases, the conventional methods such as thickening bottom plate and weight anti-floating (i.e. laying thick concrete), filling anti-floating anchor rod behind waterproof board anti-floating, draining decompression, etc. are generally adopted, but the conventional method is adopted to solve the above-mentioned basement bottom plate anti-floating diseases and again produce the following problems: 1. thickening the bottom plate and resisting floating by weight: the increased thickness of the bottom plate can reduce the clear height of the basement, so that the use is influenced; 2. and (3) supplementing an anti-floating anchor rod behind the waterproof plate for anti-floating: the existing basement structure is formed, pressure underground water can gush out when the bottom plate is perforated, silt below the foundation can be brought out accordingly, the bottom of the foundation can be hollowed out seriously, the bearing capacity of the existing structural foundation is influenced, the structural potential safety hazard is generated, and the existing waterproof plate can be prevented from being damaged by anchor rod drilling and cannot be recovered. 3. Draining and reducing pressure: the anti-floating problem cannot be fundamentally solved, the drainage ditch and the drainage facility need to be regularly enclosed, the operation cost is high, and the method is suitable for the soil layer with the upper layer of stagnant water and lower water permeability, wherein the underground water is the soil layer;
therefore, the problems of the prior art are urgently needed to be solved.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an anti-floating remedy component for the existing basement and a construction method thereof, which solve the technical problem of enhancing the anti-floating strength of the basement foundation under the condition of not influencing the use space of the basement and damaging the foundation.
In order to achieve the purpose, the anti-floating remediation assembly for the existing basement comprises a basement foundation and a pile foundation, wherein the basement foundation comprises an intermediate area and a support area, the bottom of the support area is fixedly connected with the pile foundation, and the anti-floating remediation assembly further comprises a pre-tightening force tensioning anchoring device, and the pre-tightening force tensioning anchoring device conducts buoyancy of the intermediate area to the support area.
The foundation has the advantages that the foundation is arranged below the support area of the foundation, so that the compressive strength of the foundation is high, silt and underground water below the support area cannot influence the support area, and the foundation at the middle-span area is not supported by the pile foundation below the middle-span area, so that the stability of the foundation at the middle-span area is poor, and the technical problem described by the background technology is easy to occur;
the invention also provides a construction method of the anti-floating remedy component of the existing basement:
the method comprises the following steps:
s1: sign fixing base mounted position: finding out the position of the pile foundation of the foundation according to an engineering drawing, forming a rectangular pile foundation group by taking four pile foundations as vertexes, connecting the four vertexes of the rectangular pile foundation group pairwise to form an installation connecting line, and identifying two fixing seat identification points on the installation connecting line so that the two fixing seat identification points on one installation connecting line bisect the installation connecting line;
s2: installing a fixed seat: punching holes at the identification points of the fixed seats, arranging the fixed seats at the punching holes, and fixedly connecting the fixed seats with the mid-span area of the foundation through connecting anchor rods;
s3: installing a bearing anchor rod, drilling an inclined hole in the support area, wherein the diameter of the inclined hole is larger than that of the bearing anchor rod, driving the bearing anchor rod into the inclined hole through an expansion bolt, and then pouring slurry into the inclined hole to realize the fixed connection of the bearing anchor rod and the support area of the foundation;
s4: applying pretightening force: connecting the free end of the bearing anchor rod with the steel strand through the connecting piece, and then fixedly connecting the steel strand with the fixed seat to realize the application of the pre-tightening force of the bearing anchor rod;
s5: and laying the ground, and laying concrete on the foundation to enable the concrete to submerge the fixed seat.
As a further description of the above technical solution:
the pre-tightening force tensioning and anchoring device comprises a fixed seat, at least two steel strands, at least two bearing anchor rods and at least two connecting pieces,
the fixed seat is anchored at the top of the midspan area;
the two steel strands are connected with each other through the fixing seat;
the two bearing anchor rods are respectively arranged in a downward inclined mode and are mutually anchored with the support areas on the two sides of the midspan area;
the connecting piece fixes a steel strand and a bearing anchor rod.
As a further description of the above technical solution:
the pre-tightening force stretching anchoring device also comprises a steering elbow, the steering elbow is arranged between the fixed seat and the connecting piece and used for bending and supporting the steel strand between the fixed seat and the connecting piece, the steel strand is flexible and is obliquely and downwards arranged, when the connecting part of the bearing anchor rod and the steel strand is connected, one part of the steel strand is in a bending state, the steering elbow is in a semi-circular arc shape, so that the steel strand can be bent at any angle, the bearing anchor rod adaptive to any inclination angle can be achieved, the problem that the bearing anchor rod and the steel strand cannot be installed through the connecting piece because the angle of installation of the bearing anchor rod is not corresponding to the expected angle is avoided, and meanwhile, the bearing anchor rod also plays the role of supporting the steel strand and prevents the pre-tightening force applied to the steel strand from being too large, thereby the situation of breaking down the vertical fixed seat occurs;
as a further description of the above technical solution:
the connecting piece comprises an anchor and a sleeve, the anchor is coaxially and fixedly connected with the sleeve, the sleeve is in threaded connection with the bearing anchor rod, and the end part of the steel strand is sleeved and fixed in the anchor.
As a further description of the above technical solution:
the fixed seat comprises a bottom plate, a plurality of transverse plates and a plurality of vertical plates;
it is a plurality of the diaphragm is with a plurality of the riser is all fixed to be set up on the bottom plate, and is a plurality of the diaphragm is with a plurality of crisscross netted design that is each other between the riser, set up the through-hole that supplies the steel strand wires to pass on the riser.
As a further description of the above technical solution:
the pre-tightening force tensioning anchor device also comprises two bearing anchor rods, two connecting pieces, two fixing seats, two steel stranded wires and two tensioning steel stranded wires, wherein,
two ends of each steel strand are respectively connected with the connecting piece and the fixing seats adjacent to the connecting piece, and two ends of each tension steel strand are respectively connected with the two fixing seats.
As a further description of the above technical solution:
the pre-tightening force tensioning and anchoring device comprises two bearing anchor rods, two connecting pieces, two fixing seats and two steel strands, wherein,
one end of the steel strand is fixed on one of the fixed seats, and the other end of the steel strand penetrates through the other fixed seat and is fixedly connected with one of the connecting pieces.
As a further description of the above technical solution:
the pre-tightening force tensioning and anchoring device comprises two bearing anchor rods, two connecting pieces, three fixing seats and two steel strands, wherein,
the three fixing seats are positioned on a straight line, one end of one steel strand is fixed on the fixing seat positioned in the middle, the other end of the steel strand penetrates through one fixing seat on the outermost side and is fixedly connected with one connecting piece, and one connecting piece is in threaded connection with one bearing anchor rod.
Compared with the prior art, the invention has the beneficial effects that:
(I): the pre-tightening force tensioning anchoring device is formed by arranging the fixing seat, the steel strand and the bearing anchor rod, when the water pressure below the midspan area is overlarge, the pressure applied to the midspan area can be transmitted to the bearing anchor rod through the steel strand and the fixing seat, and the bearing anchor rod transmits the force to the support area, so that the pressure applied to the midspan area is reduced, and the integral stability of the foundation is higher;
the basement is divided into a plurality of rectangular pile foundation group areas, wherein the support areas in the rectangular pile foundation group areas can uniformly divide pressure, and the situation that the pressure of a certain support area in the rectangular pile foundation group area is more does not occur, so that the overall stability of the foundation is influenced, and finally the pre-tightening force tensioning anchoring device is more stable and has longer service life;
(III): all construction operations are carried out on the waterproof board surface, and the construction is simple and convenient.
(IV): need not to bore waterproof board, the construction is not influenced by water pressure.
(V): the existing waterproof layer can not be damaged.
(VI): no large-scale construction mechanical equipment is provided, and the existing basement clearance meets the construction requirements.
Drawings
FIG. 1 is a construction layout of an existing basement anti-floating remediation assembly of the present invention;
figure 2 is a cross-sectional view at a of figure 1 of an existing basement anti-flotation remediation assembly of the present invention;
figure 3 is a schematic view of one embodiment of an existing basement anti-flotation remediation assembly of the present invention;
figure 4 is a top view of figure 3 of an existing basement anti-float remediation assembly of the present invention;
FIG. 5 is a perspective view of a mounting bracket for an anti-float remediation assembly for an existing basement;
figure 6 is a schematic illustration of the attachment of the left load-bearing anchor of a second embodiment of an existing basement anti-flotation remediation assembly of the present invention;
figure 7 is a schematic illustration of the connection of the right side load-bearing anchor of a second embodiment of an existing basement anti-float remediation assembly according to the invention;
figure 8 is a top view of a second embodiment of an existing basement anti-flotation remediation assembly of the present invention;
figure 9 is a schematic view of three embodiments of an existing basement anti-flotation remediation assembly of the present invention;
figure 10 is a top view of figure 9 of an existing basement anti-flotation remediation assembly of the present invention.
In the figure: 1. a foundation; 11. crossing a middle area; 12. a pedestal region; 2. a pile foundation; 3. tensioning the anchoring device by pre-tightening force; 31. a fixed seat; 311. a base plate; 312. a vertical plate; 313. a transverse plate; 32. steel strand wires; 33. a load-bearing anchor rod; 34. a connecting member; 341. an anchorage device; 342. a sleeve; 35. a steering elbow; 36. connecting an anchor rod; 37. and (5) tensioning the steel strand.
Detailed Description
In order to explain the technical contents, structural features, attained objects and effects of the present invention in detail, the following embodiments are exemplified and the detailed description is given with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
Because the pile foundation 2 is arranged below the support area 12 of the foundation 1, the compressive strength is high, silt and underground water below the support area 12 cannot influence the support area 12, and because the pile foundation 2 is not arranged below the midspan area 11 as a support, the stability of the foundation 1 at the midspan area 11 is poor, and the technical problem described by the background art is easy to occur;
fixing seat 31: for the purpose of fixedly connecting with the foundation 1 and carrying the anchors 341 and the steel strands 32, please refer to fig. 5, which includes a bottom plate 311, two horizontal plates 313 and two vertical plates 312;
the two transverse plates 313 and the two vertical plates 312 are both fixedly arranged on the bottom plate 311, the two transverse plates 313 and the two vertical plates 312 are staggered with each other to form a net shape, and the two transverse plates 313, the two vertical plates 312 and the bottom plate 311 are integrally formed, so that the overall strength of the fixed seat 31 is enhanced;
anchor 341: the steel strand 32 is used for connecting and fixing, and the type thereof is a Ratt prestressed anchorage device;
the connecting piece 34: the steel strand connecting device is used for connecting a bearing anchor rod 33 and a steel strand 32, and comprises an anchor 341 (also adopting a Ratt prestressed anchorage device) and a sleeve 342, wherein the anchor 341 and the sleeve 342 are coaxially and integrally formed and fixedly connected, and an internal thread in threaded connection with the bearing anchor rod 33 is arranged in the sleeve 342;
the load-bearing anchor 33: the screw rod is used for communicating the support area 12 with the midspan area 11, and one end of the screw rod is provided with an expansion bolt;
a steering elbow 35: for supporting and bending steel strand 32, because the steel strand 32 has the flexibility, what the steel strand 32 adopted again is that the slope sets up downwards, when bearing stock 33 and steel strand 32 junction, the steel strand 32 this moment has a part to be the state of bending, and the turn bend 35 of here adopts half-circular arc design, so, make the steel strand 32 can realize the purpose of bending any angle, thereby can reach the bearing stock 33 of arbitrary inclination angle of adaptation, can not have because of the angle of bearing stock 33 installation does not correspond with the anticipated angle, bearing stock 33 and steel strand 32 are through the problem that the connecting piece was not installed, simultaneously, bearing stock 33 still plays the purpose of supporting steel strand 32, prevent that the pretightning force that receives because of steel strand 32 is too big, thereby the condition that appears pulling out vertical fixing base 31 takes place to take place to draw down and take place
Example 1:
the present invention provides an anti-floating remedy assembly for an existing basement, which is shown in fig. 2 and fig. 3-4, and comprises:
pre-tightening force tensioning and anchoring device 3: to conduct the buoyancy forces across the mid-region 11 to the seating region 12, comprising: two load-bearing anchor rods 33, two connecting pieces 34, two fixed seats 31, four steel strands 32, six anchors 341, eight connecting anchor rods 36 and two steering elbows 35;
wherein, two bearing anchor rods 33 are respectively driven into the midspan area 11, the fixing of the bearing anchor rods 33 and the midspan area 11 is realized through expansion bolts, then connecting pieces 34 are respectively arranged on the two bearing anchor rods 33, the connecting pieces are connected, the fixing seat 31 is fixedly connected on the foundation 1 through connecting anchor rods 36, so as to realize the fixed connection of the fixing seat 31 and the foundation 1, then two steering bent pipes 35 are respectively fixedly arranged on the fixing seat 31, six anchorage devices 341 are connected, two tension steel stranded wires 37 are arranged on the two fixing seats 31 through four anchorage devices 341, so as to realize the fixing between the two fixing seats 31, one end of one steel stranded wire 32 in the other two steel stranded wires 32 is fixedly connected with the anchorage devices 341, the other end of the steel stranded wire bypasses the steering bent pipes 35 to realize the bending, when the steel stranded wire 32 is bent to be parallel to the bearing anchor rods 33, finally, the bent steel strand 32 and the connecting piece 34 are installed together, if the steel strand 32 is not installed, a part of the steel strand 32 is cut off to enable the steel strand 32 to be installed on the connecting piece 34, and the included angle alpha between the steel strand 32 and the ground is 1: 2, at this time, the pretightening force on the steel strand 32 is strongest, the pretightening force tension anchoring device 3 is most stable, and the tension steel strand 37 and the middle steel strand 32 are symmetrically arranged, so that the tension of the steel strand 32 on the fixing seat 31 is balanced, the stability of the fixing seat 31 is stronger, and the two middle steel strands 32 are positioned on the same horizontal line, so that the tension on the fixing seat 31 is on the same horizontal line, so that the fixing seat 31 does not have the condition of rotation moment, the fixing seat 31 has the rotation movement trend, the connection between the fixing seat 31 and the concrete and the foundation 1 is unstable, and finally the concrete is cracked and seeped water;
example 2:
in order to achieve the above object, referring to fig. 6 in combination with fig. 7-8, an anti-floating remedy assembly for an existing basement according to the present invention includes:
pre-tightening force tensioning and anchoring device 3: to conduct the buoyancy forces across the mid-region 11 to the seating region 12, comprising: two load-bearing anchor rods 33, two connecting pieces 34, two fixed seats 31, two steel strands 32, two anchors 341, eight connecting anchor rods 36 and two steering elbows 35;
wherein, two bearing anchor rods 33 are respectively driven into the midspan area 11, the fixing of the bearing anchor rods 33 and the midspan area 11 is realized through expansion bolts, then connecting pieces 34 are respectively arranged on the two bearing anchor rods 33, the connecting pieces are connected, the fixed seat 31 is fixedly connected on the foundation 1 through connecting anchor rods 36, thereby realizing the fixed connection of the fixed seat 31 and the foundation 1, then, two steering bent pipes 35 are respectively and fixedly arranged on the fixed seats 31, each fixed seat 31 is connected with one anchorage device 341, one end of one steel strand 32 is anchored with the anchorage device 341 on the right fixed seat 31, the other end passes through the left fixed seat 31 and is bent by bypassing the steering bent pipe 35, when the steel strand 32 is bent to be parallel to the bearing anchor rods 33, namely, the bent steel strand 32 and the connecting pieces 34 are arranged together, if the steel strand 32 is not arranged, part of the steel strand 32 is cut off, make it to install on connecting piece 34, anchorage device 341 anchor on another steel strand wires 32 one end and the left side fixing base 31, the other end passes right side fixing base 31, it realizes bending to bypass turn to return bend 35, when steel strand wires 32 are crooked to be parallel to each other with bearing stock 33, can, install crooked steel strand wires 32 and connecting piece 34 together, if steel strand wires 32 do not install, then cut out some steel strand wires 32, make it can install on connecting piece 34, contained angle alpha between steel strand wires 32 and the ground, tan alpha 1: 2, at this time, the pretightening force on the steel strand 32 is strongest, and the pretightening force tension anchoring device 3 is most stable, so that fewer parts are used in the installation process, and the installation process is relatively simple, but the installation by adopting the method can exist, because the two fixing seats 31 are not fixedly connected, when the fixing seats 31 are subjected to buoyancy, the situation that the tension is unstable occurs, compared with the case 1, the risk that the fixing seats are separated from the foundation 1 is easy to occur, and a rotating pretightening force moment also occurs, namely, the fixing seats 31 are easy to have a rotating movement trend, so that the connection between the fixing seats 31 and the concrete and the foundation 1 is unstable, and finally, the concrete is cracked and seeped water;
example 3:
in order to achieve the above object, referring to fig. 9 and fig. 10, an anti-floating remedy assembly for an existing basement according to the present invention includes:
pre-tightening force tensioning and anchoring device 3: to conduct the buoyancy forces across the mid-region 11 to the seating region 12, comprising: two load-bearing anchor rods 33, two connecting pieces 34, three fixing seats 31, two steel strands 32, four anchors 341, twelve connecting anchor rods 36 and two steering elbows 35;
wherein, two bearing anchor rods 33 are respectively driven into the midspan area 11, the fixing of the bearing anchor rods 33 and the midspan area 11 is realized through expansion bolts, then connecting pieces 34 are respectively arranged on the two bearing anchor rods 33, the three fixing seats 31 are connected on the foundation 1 through connecting anchor rods 36, so that the three fixing seats 31 are positioned on the same horizontal line, thereby realizing the fixed connection of the fixing seats 31 and the foundation 1, then, two steering bent pipes 35 are respectively fixedly arranged on the leftmost fixing seats 31 and the rightmost fixing seats 31, two anchorage devices 341 are arranged on the middle fixing seat 31, the fixing seats on the two sides are respectively provided with one anchorage device 341, one end of one steel strand 32 is anchored with the anchorage device 341 on the middle fixing seat 31, the other end passes through the fixing seat 31 on the left side and bypasses the steering bent pipe 35 to realize the bending, when the steel strand 32 is bent to be mutually parallel with the bearing anchor rods 33, that is, install crooked steel strand 32 and connecting piece 34 together, if steel strand 32 does not install, then cut out some steel strand 32, make it can install on connecting piece 34, anchorage device 341 anchor on another steel strand 32 one end and the fixing base 31 in the middle of, the other end passes right side fixing base 31, it realizes bending to bypass turn to return bend 35, when steel strand 32 is crooked to be parallel to each other with bearing stock 33, can, install crooked steel strand 32 and connecting piece 34 together, if steel strand 32 does not install, then cut out some steel strand 32, make it can install on connecting piece 34, contained angle alpha between steel strand 32 and the ground, tan alpha 1: 2, at this time, the pre-tightening force on the steel strand 32 is strongest, and the pre-tightening force tensioning and anchoring device 3 is most stable;
example 3 has a significant effect compared to examples 1 and 2;
firstly, compared with embodiment 1, embodiment 3 has fewer parts and simpler construction process compared with embodiment 1, and secondly, embodiment 3 concentrates all the force on the middle fixing seat 31, while embodiment 1 forms two fixing seats 31 into a whole through two steel strands 32, obviously, embodiment 3 can make the whole pretension tension anchor device 3 have higher strength than embodiment 1;
compared with the embodiment 2, the embodiment 3 has the same construction process and the same parts in use, but compared with the embodiment 2, the embodiment 3 does not have the condition of rotating moment and the condition that the load-bearing anchor rods 33 on the left side and the right side are respectively connected to the two fixed seats 31, so that the overall strength of the pretension tension anchor device 3 is not high;
in summary, compared with the embodiments 1 and 2, the embodiment 3 has the obvious characteristics of less material consumption, simple construction process and more stable structure;
referring to fig. 1 and fig. 2, a construction method of an anti-floating remediation assembly for an existing basement according to the present invention includes:
the method comprises the following steps:
s1: sign fixing base 31 mounted position: finding out the position of a pile foundation 2 of a foundation 1 according to engineering drawings, forming a rectangular pile foundation group by taking four pile foundations 2 as vertexes, connecting the four vertexes of the rectangular pile foundation group pairwise to form installation connecting lines, identifying two fixing seat identification points on the installation connecting lines, enabling the two fixing seat identification points on one installation connecting line to bisect the installation connecting line on the installation connecting line, and then arranging a pre-tightening force tensioning anchor device 3 on each installation connecting line, so that the basement is divided into a plurality of rectangular pile foundation group areas, wherein a support area 12 in each rectangular pile foundation group area can uniformly divide pressure, the partial pressure of a certain support area 12 in each rectangular pile foundation group area is not more, the integral stability of the foundation 1 is influenced, and finally the pre-tightening force tensioning anchor device 3 is more stable and has longer service life;
installing a pre-tightening force tensioning anchoring device 3;
s2: installing a fixed seat: punching holes at the identification points of the fixed seats, arranging the fixed seats 31 at the punched holes, and fixedly connecting the fixed seats 31 with the middle spanning area 11 of the foundation 1 through connecting anchor rods 36;
s3: installing a bearing anchor rod, drilling an inclined hole in the support area 12, wherein the diameter of the inclined hole is larger than that of the bearing anchor rod 33, driving the bearing anchor rod 33 into the inclined hole through an expansion bolt, and then pouring slurry into the inclined hole to realize the fixed connection of the bearing anchor rod 33 and the support area of the foundation 1;
s4: applying pretightening force: connecting the free end of the bearing anchor rod 33 with the steel strand 32 through the connecting piece 34, and then fixedly connecting the steel strand 32 with the fixed seat 31 to realize the application of the pre-tightening force of the bearing anchor rod 33;
s5: glue is coated on each fixed seat 31, the steel strand 32 and the bearing anchor rod 33, so that the fixed seats 31, the steel strand 32 and the bearing anchor rod 33 are stably connected with concrete;
s6: laying the ground, laying concrete on the foundation 1, and enabling the concrete to submerge the fixed seat 31;
in conclusion; by adopting the device and the construction method, the following effects can be achieved:
(I): the pre-tightening force tensioning and anchoring device 3 is formed by arranging the fixed seat 31, the steel strand 32 and the bearing anchor rod 33, when the water pressure below the middle crossing area 11 is overlarge, the middle crossing area 11 can transmit the pressure applied to the middle crossing area to the bearing anchor rod 33 through the steel strand 32 and the fixed seat 31, and the bearing anchor rod 33 transmits the force to the support area 12, so that the pressure applied to the middle crossing area 11 is reduced, and the whole stability of the foundation 1 is high;
(II): by dividing the basement into a plurality of rectangular pile foundation group areas, the support areas 12 in each rectangular pile foundation group area can uniformly divide pressure, and the situation that the partial pressure of one support area 12 in each rectangular pile foundation group area is more does not occur, so that the overall stability of the foundation 1 is influenced, and finally the pre-tightening force tensioning and anchoring device 3 is more stable and has longer service life;
(III): all construction operations are carried out on the waterproof board surface, and the construction is simple and convenient.
(IV): need not to bore waterproof board, the construction is not influenced by water pressure.
(V): the existing waterproof layer can not be damaged.
(VI): no large-scale construction mechanical equipment is provided, and the existing basement clearance meets the construction requirements.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides an anti remedy subassembly that floats of existing basement, includes basement foundation (1) and pile foundation (2), and basement foundation (1) includes that integrated into one piece and interconnect stride middle district (11) and support district (12), support district (12) bottom fixed connection pile foundation (2), its characterized in that: the device also comprises a pre-tightening force tensioning and anchoring device (3), wherein the pre-tightening force tensioning and anchoring device (3) transmits buoyancy force of the cross middle area (11) to the support area (12);
the pre-tightening force tensioning and anchoring device (3) comprises a fixed seat (31), at least two steel strands (32), at least two load-bearing anchor rods (33) and at least two connecting pieces (34),
the fixed seat (31) is anchored at the top of the midspan area (11);
the two steel strands (32) are connected with each other through the fixed seat (31), and any one of the following three modes is specifically adopted:
one is that the pre-tightening force tension anchoring device (3) further comprises two load-bearing anchor rods (33), two connecting pieces (34), two fixing seats (31), two steel strands (32) and two tension steel strands (37), wherein two ends of each steel strand (32) are respectively connected with the connecting piece (34) and the fixing seat (31) adjacent to the connecting piece (34), and two ends of each tension steel strand (37) are respectively connected with the two fixing seats (31);
secondly, the pretension tension anchoring device (3) comprises two load-bearing anchor rods (33), two connecting pieces (34), two fixing seats (31) and two steel strands (32), wherein one end of one steel strand (32) is fixed on one fixing seat (31), and the other end of the steel strand (32) penetrates through the other fixing seat (31) and is fixedly connected with one connecting piece (34);
thirdly, the pre-tightening force tensioning anchoring device (3) comprises two load-bearing anchor rods (33), two connecting pieces (34), three fixing seats (31) and two steel strands (32), wherein the three fixing seats (31) are located on a straight line, one end of each steel strand (32) is fixed on the fixing seat (31) located in the middle, the other end of each steel strand penetrates through one fixing seat (31) on the outermost side and is fixedly connected with one connecting piece (34), and one connecting piece (34) is in threaded connection with one load-bearing anchor rod (33);
the two bearing anchor rods (33) are respectively arranged in a downward inclined mode and are mutually anchored with the support areas (12) on the two sides of the middle spanning area (11);
the connecting element (34) fixes a steel strand (32) and a load-bearing anchor (33).
2. An existing basement anti-flotation remediation assembly as claimed in claim 1, wherein: the pre-tightening force tensioning and anchoring device (3) further comprises a steering elbow (35), wherein the steering elbow (35) is arranged between the fixing seat (31) and the connecting piece (34) and used for bending and supporting the steel strand (32) between the fixing seat (31) and the connecting piece (34).
3. An existing basement anti-flotation remediation assembly as claimed in claim 1, wherein: the connecting piece (34) comprises an anchor (341) and a sleeve (342), the anchor (341) is coaxially and fixedly connected with the sleeve (342), the sleeve (342) is in threaded connection with the load-bearing anchor rod (33), and the end part of the steel strand (32) is sleeved and fixed in the anchor (341).
4. An existing basement anti-flotation remediation assembly as claimed in claim 1, wherein: the fixed seat (31) comprises a bottom plate (311), a plurality of transverse plates (313) and a plurality of vertical plates (312);
the transverse plate (313) and the vertical plates (312) are fixedly arranged on the bottom plate (311), the transverse plate (313) and the vertical plates (312) are mutually staggered to form a net-shaped design, and through holes for the steel strands (32) to pass through are formed in the vertical plates (312).
5. The construction method of the existing basement anti-floating remediation component as claimed in claim 1, wherein the construction method comprises the following steps: the method comprises the following steps:
s1: sign fixing base mounted position: finding out the position of the pile foundation (2) of the foundation (1) according to an engineering drawing, forming a rectangular pile foundation group by taking four pile foundations (2) as vertexes, connecting every two of the four vertexes of the rectangular pile foundation group to form an installation connecting line, and marking two fixing seat identification points on the installation connecting line so that the two fixing seat identification points on one installation connecting line equally divide the installation connecting line thereon;
s2: installing a fixed seat: punching holes at the identification points of the fixed seats, arranging the fixed seats (31) at the punched holes, and fixedly connecting the fixed seats (31) with the cross-middle area (11) of the foundation (1) through connecting anchor rods (36);
s3: installing a bearing anchor rod, drilling an inclined hole in the support area (12), wherein the aperture of the inclined hole is larger than the diameter of the bearing anchor rod (33), driving the bearing anchor rod (33) into the inclined hole through an expansion bolt, and then pouring slurry into the inclined hole to realize the fixed connection of the bearing anchor rod (33) and the support area of the foundation (1);
s4: applying pretightening force: connecting the free end of the bearing anchor rod (33) with the steel strand (32) through the connecting piece (34), and then fixedly connecting the steel strand (32) with the fixed seat (31) to realize the application of the pretightening force of the bearing anchor rod (33);
s5: and paving the ground, and paving concrete on the foundation (1) to enable the concrete to submerge the fixed seat (31).
6. The construction method of the existing basement anti-floating remediation assembly according to claim 5, wherein the construction method comprises the following steps: after the step S4 is carried out, glue is coated on each fixing seat (31), the steel strand (32) and the bearing anchor rod (33), and then the step S6 is carried out, so that the fixing seats (31), the steel strand (32) and the bearing anchor rod (33) are stably connected with the concrete.
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| CN202110724638.XA CN113482062B (en) | 2021-06-29 | 2021-06-29 | Anti-floating remedy assembly for existing basement and construction method thereof |
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| CN202110724638.XA CN113482062B (en) | 2021-06-29 | 2021-06-29 | Anti-floating remedy assembly for existing basement and construction method thereof |
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| CN104929381A (en) * | 2015-06-02 | 2015-09-23 | 项剑锋 | Steel-support non-cohesive steel strand lower support type prestress floor reinforcing method |
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| CN1594835A (en) * | 2004-07-15 | 2005-03-16 | 中国矿业大学 | Three dimensional anchor cable bolting technology in heading |
| CN201133085Y (en) * | 2007-06-07 | 2008-10-15 | 李树林 | Structure for enhancing external prestressing force effect |
| CN103388408A (en) * | 2013-07-28 | 2013-11-13 | 桂林理工大学 | External pre-stressed tendon reinforcing steering block for building structure |
| CN203669406U (en) * | 2014-01-08 | 2014-06-25 | 周磊 | Reinforced structure with prestressed concrete slab additionally arranged |
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| CN113482062A (en) | 2021-10-08 |
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Address after: Jucheng scientific research building, No.4, wudayuan Road, Wuda Science Park, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee after: Wuhan Jucheng Structure Group Co.,Ltd. Address before: Jucheng scientific research building, No.4, wudayuan Road, Wuda Science Park, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee before: WUDA JUCHENG STRUCTURE Co.,Ltd. |
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