阅读说明：本技术 抗浮锚杆与地下水平结构相结合的永久支护结构及方法 (Permanent support structure and method combining anti-floating anchor rod with underground horizontal structure ) 是由 李连祥 贾斌 张强 赵永新 苏日嘎拉图 李红波 韩志霄 于 2020-06-15 设计创作，主要内容包括：本发明公开了抗浮锚杆与地下水平结构相结合的永久支护结构及方法,其技术方案为：包括地下室外墙、水平楼板,还包括抗浮锚杆,所述水平楼板外侧设置外伸支撑,外伸支撑连接于抗浮锚杆与水平楼板之间以构造永久支护结构；其中,所述抗浮锚杆内部设置若干纵向受力钢筋。本发明解决了现有基坑工程中支护结构浪费及地下室外墙承担较大土压力的现状,使基坑支护结构发挥挡土挡水作用的同时,永久承担坑外土体的土压力。(The invention discloses a permanent supporting structure and a method for combining an anti-floating anchor rod with a horizontal underground structure, and the technical scheme is as follows: the support structure comprises a basement outer wall, a horizontal floor slab and an anti-floating anchor rod, wherein an overhanging support is arranged on the outer side of the horizontal floor slab and connected between the anti-floating anchor rod and the horizontal floor slab to construct a permanent support structure; and a plurality of longitudinal stress steel bars are arranged in the anti-floating anchor rod. The invention solves the problems that the supporting structure in the existing foundation pit engineering is wasted and the basement outer wall bears larger soil pressure, and ensures that the foundation pit supporting structure plays the roles of retaining soil and water and permanently bears the soil pressure of the soil outside the pit.)

1. The permanent supporting structure combining the anti-floating anchor rod and the underground horizontal structure comprises a basement outer wall and a horizontal floor slab, and is characterized by further comprising the anti-floating anchor rod, wherein an overhanging support is arranged on the outer side of the horizontal floor slab and connected between the anti-floating anchor rod and the horizontal floor slab to construct the permanent supporting structure; and a plurality of longitudinal stress steel bars are arranged in the anti-floating anchor rod.

2. The permanent support structure of claim 1, wherein a plurality of rows of anti-floating anchor rods are arranged on the outer side of the outer wall of the basement, and each row of anti-floating anchor rods has a plurality of rows.

3. A permanent support structure with anti-floating anchor rods combined with a ground horizontal structure according to claim 2, wherein adjacent anti-floating anchor rods in each row of anti-floating anchor rods are connected through construction anchor rods.

4. A permanent support structure with anti-floating anchor combined with underground horizontal structure as claimed in claim 3, characterized in that steel plate embedment is provided at the position of the construction anchor connected with the overhanging support.

5. The permanent support structure of claim 1, wherein the horizontal floor slab has a raised portion at its edge, and the raised portion has a reinforcing bar at its edge.

6. The permanent support structure of claim 5, wherein a bolt hole is reserved at one end of the overhanging support, and the overhanging support is connected with the reserved steel bar of the bulge through the bolt hole.

7. A permanent support structure of an anti-floating anchor combined with a ground horizontal structure according to claim 1, wherein the overhanging supports are waterproofed.

8. A construction method of a permanent supporting structure in which anti-floating anchor rods are combined with a ground horizontal structure according to any one of claims 1 to 7, comprising:

vertically drilling a hole downwards in the ground, and inserting an anti-floating anchor rod into the drilled hole; injecting cement mortar into the drill hole until the anti-floating anchor rod is completely constructed;

arranging a transverse reinforcing mesh on the top of the anti-floating anchor rod, and pouring concrete into the transverse reinforcing mesh;

arranging structural anchor rods between corresponding rows of anti-floating anchor rods close to the outer wall of the basement, and arranging steel plate embedded parts at the structural anchor rods connected with the horizontal floor slab;

excavating to the bottom of a foundation pit from top to bottom step by step according to the floors of the basement, and arranging a structural anchor rod and a steel plate embedded part on the corresponding floor;

constructing an overhanging support according to the sequence from bottom to top, and connecting the overhanging support with a horizontal floor slab and a structural anchor rod; and the fertilizer groove is filled with earthwork.

9. The construction method of the permanent supporting structure combining the anti-floating anchor rod and the underground horizontal structure according to claim 8, wherein the overhanging support is poured by reinforced concrete, one end of the overhanging support is connected with the basement beam slab system through a reserved bulge of the horizontal floor slab, and the other end of the overhanging support is connected with the construction anchor rod through a steel plate embedded part.

10. The construction method of the permanent supporting structure combining the anti-floating anchor rod and the underground horizontal structure according to claim 9, wherein the overhanging support is fixed with the horizontal floor slab by a bolt, and the steel plate embedded part is connected with the construction anchor rod by welding.

Technical Field

The invention relates to the field of permanent support, in particular to a permanent support structure and a permanent support method combining an anti-floating anchor rod and a horizontal underground structure.

Background

Along with the development of urban underground space, the foundation pit is larger and larger in scale, deeper and deeper in depth and more in supporting structures. After the construction of the underground main body is finished, the temporary foundation pit supporting structure loses the function, is lost at the outer edge of the main body structure and stays underground for a long time, unnecessary waste is caused, and even subsequent other engineering design construction can be influenced.

The inventor finds that in the existing basement design, the basement outer wall bears the soil body soil pressure outside the foundation pit, on one hand, the basement outer wall is generally thick, the construction cost is high, and on the other hand, the stability is poor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a permanent supporting structure and a permanent supporting method combining an anti-floating anchor rod and a underground horizontal structure, which solve the problems that the supporting structure in the existing foundation pit engineering is wasted and the basement outer wall bears larger soil pressure, and enable the foundation pit supporting structure to play the roles of retaining soil and water and permanently bear the soil pressure of the soil outside the pit.

In order to achieve the purpose, the invention is realized by the following technical scheme:

in a first aspect, an embodiment of the present invention provides a permanent support structure combining an anti-floating anchor rod and a horizontal underground structure, including a basement exterior wall, a horizontal floor slab, and an anti-floating anchor rod, wherein an overhanging support is arranged outside the horizontal floor slab, and the overhanging support is connected between the anti-floating anchor rod and the horizontal floor slab to construct the permanent support structure; and a plurality of longitudinal stress steel bars are arranged in the anti-floating anchor rod.

As a further implementation mode, a plurality of rows of anti-floating anchor rods are arranged on the outer side of the basement outer wall, and each row of anti-floating anchor rods is provided with a plurality of anchor rods.

As a further realization mode, in each row of anti-floating anchor rods, adjacent anti-floating anchor rods are connected through the construction anchor rods.

As a further implementation, a steel plate embedment is provided at the construction bolt location in connection with the outrigger.

As a further implementation mode, the edge of the horizontal floor slab is provided with a protruding part, and reinforcing steel bars are reserved at the edge of the protruding part.

As a further implementation mode, a bolt hole is reserved at one end of the overhanging support, and the overhanging support is connected with a reserved steel bar of the protruding portion through the bolt hole.

As a further implementation, the overhanging support is waterproofed.

In a second aspect, an embodiment of the present invention further provides a construction method of a permanent supporting structure in which an anti-floating anchor rod is combined with a ground horizontal structure, including:

vertically drilling a hole downwards in the ground, and inserting an anti-floating anchor rod into the drilled hole; injecting cement mortar into the drill hole until the anti-floating anchor rod is completely constructed;

arranging a transverse reinforcing mesh on the top of the anti-floating anchor rod, and pouring concrete into the transverse reinforcing mesh;

arranging structural anchor rods between corresponding rows of anti-floating anchor rods close to the outer wall of the basement, and arranging steel plate embedded parts at the structural anchor rods connected with the horizontal floor slab;

excavating to the bottom of a foundation pit from top to bottom step by step according to the floors of the basement, and arranging a structural anchor rod and a steel plate embedded part on the corresponding floor;

constructing an overhanging support according to the sequence from bottom to top, and connecting the overhanging support with a horizontal floor slab and a structural anchor rod; and the fertilizer groove is filled with earthwork.

As a further implementation mode, the overhanging support is poured by reinforced concrete, one end of the overhanging support is connected with a basement beam slab system through a reserved protruding part of a horizontal floor slab, and the other end of the overhanging support is connected with a construction anchor rod through a steel plate embedded part.

As a further implementation mode, the overhanging support is fixed with the horizontal floor slab through bolts, and the steel plate embedded part is connected with the construction anchor rod in a welding mode.

The beneficial effects of the above-mentioned embodiment of the present invention are as follows:

(1) one or more embodiments of the invention connect the anti-floating anchor rod and the basement outer wall through the overhanging support, and the foundation pit supporting structure plays a role in retaining soil and water, and is used as an underground permanent structure or bears a part of functions, thereby prolonging the service life of the supporting structure;

(2) one or more embodiments of the invention use the overhanging supports to connect the anti-floating anchor rods with the horizontal floor of the basement, so that the overhanging supports of the raft plate, the middle plate and the top plate of the anti-floating anchor rods bear the soil pressure outside the station, and the outer wall of the basement only bears the side pressure of the filling soil, thereby enhancing the underground safety.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic block diagram of the present invention according to one or more embodiments;

FIG. 2 is a schematic view of a lower chamber horizontal floor connection point according to one or more embodiments of the present invention;

FIG. 3 is a top view of a basement horizontal floor connection point according to one or more embodiments of the invention;

FIG. 4 is a schematic view of an outrigger and basement horizontal floor connection point according to one or more embodiments of the invention;

FIG. 5 is a top view of the attachment point of an outrigger to a horizontal floor of a basement according to one or more embodiments of the invention;

FIG. 6 is a cross-sectional view of an anti-floating anchor according to one or more embodiments of the present invention;

FIG. 7 is a schematic illustration of construction of a bolt and steel plate embedment according to one or more embodiments of the present invention;

the anti-floating anchor rod comprises an anti-floating anchor rod 1, an overhanging support 2, a basement 3, a backfill soil 4, a foundation slab 5, a horizontal floor slab 6, a basement outer wall 7, a bolt hole 8, a bolt hole 9, a longitudinal stress steel bar 10, a steel plate embedded part 11 and a construction anchor rod.

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/or "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;

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

The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected directly or indirectly through an intermediate medium, or the two components can be connected internally or in an interaction relationship, and the terms can be understood by those skilled in the art according to specific situations.