CN113123344B - Anchor point structure of foundation pit support and setting method thereof - Google Patents
Anchor point structure of foundation pit support and setting method thereof Download PDFInfo
- Publication number
- CN113123344B CN113123344B CN202110196157.6A CN202110196157A CN113123344B CN 113123344 B CN113123344 B CN 113123344B CN 202110196157 A CN202110196157 A CN 202110196157A CN 113123344 B CN113123344 B CN 113123344B
- Authority
- CN
- China
- Prior art keywords
- anchor point
- reinforcement cage
- shaped bent
- magnet
- wire rope
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention provides a method for setting an anchor point structure of a foundation pit support, which comprises the following steps: fixing a flexible steel wire rope on a reinforcement cage, wherein the flexible steel wire rope comprises a U-shaped bending section exposed outside the reinforcement cage, and a magnet is arranged on the U-shaped bending section; covering the U-shaped bent section and the magnet by using a protective shell to form a covering body, bending the covering body upwards and lowering the reinforcement cage; grouting into the pile hole and solidifying to form a pile body; detecting and determining the position of the magnet by adopting a detection device on the outer side of the pile body, wherein the position of the pile body corresponding to the magnet is an anchor point position; and removing the concrete on the pile body at the anchor point position to expose the cladding body, removing the protective shell on the cladding body to expose the U-shaped bent section, wherein the U-shaped bent section correspondingly forms the anchor point. The invention also provides an anchor point structure for foundation pit support. The anchor point structure formed by the method for setting the anchor point structure of the foundation pit support has high reliability.
Description
Technical Field
The invention relates to the technical field of foundation pit construction, in particular to an anchor point structure of a foundation pit support and a setting method thereof.
Background
The tension of urban land promotes the building structure to be continuously expanded to the underground space, the development of the urban underground space is accelerated, and the urban foundation pit excavation scale is developed towards a larger and deeper direction. Due to various factors, the placement time of the foundation pit is too long or the surrounding conditions of the foundation pit are changed, so that the horizontal direction of the foundation pit is deformed too much and far exceeds the specified limit value, and safety accidents occur in a construction site easily. Therefore, a supporting structure is required to be arranged in the foundation pit construction process.
In the related art, a common method for supporting a foundation pit is to arrange piles and inclined struts in a matched mode to increase the strength of a soil body of a pit wall of the foundation pit and avoid the soil body from collapsing. The inclined strut is directly arranged on the wall of the foundation pit in the common method, the operation is simple, but the inclined strut is easy to slide off in the supporting process due to the fact that an anchoring structure is not arranged, and the use safety is affected. Therefore, anchor points need to be arranged in the inclined strut system, and the inclined strut is connected with the anchor points so as to increase the connection stability of the inclined strut and the foundation pit wall.
Therefore, there is a need for a new anchor structure for an excavation supporting structure and a method for installing the same to solve the above problems.
Disclosure of Invention
The invention aims to overcome the technical problems and provides a foundation pit supporting anchor point structure with high reliability and a setting method thereof.
In order to achieve the aim, the invention provides a method for setting an anchor point structure of a foundation pit support, which comprises the following steps:
s1: fixing a flexible steel wire rope on a reinforcement cage, wherein the flexible steel wire rope comprises a U-shaped bending section exposed outside the reinforcement cage, and a magnet is arranged on the U-shaped bending section;
s2: covering the U-shaped bent section and the magnet by using a protective shell to form a covering body, hoisting the reinforcement cage to enable the bottom end of the reinforcement cage to be aligned with the pile hole, bending the covering body upwards, and lowering the reinforcement cage;
s3: grouting into the pile hole, and forming a pile body after solidification;
s4: detecting and determining the position of the magnet by adopting a detection device on the outer side of the pile body, wherein the position of the pile body corresponding to the magnet is an anchor point position;
s5: and removing the concrete on the pile body at the anchor point position to expose the cladding body, removing the protective shell on the cladding body to expose the U-shaped bent section, wherein the U-shaped bent section correspondingly forms the anchor point.
Preferably, the reinforcement cage includes vertical reinforcing bar and stirrup, the welding has a plurality of fixed reinforcing bars on the vertical reinforcing bar, flexible wire rope passes through the connecting piece to be fixed in on the fixed reinforcing bar, U-shaped bent section is followed adjacent two expose in the clearance of vertical reinforcing bar.
Preferably, the connecting piece is a U-shaped bolt.
Preferably, the magnet is a magnetic ring, and the magnetic ring is sleeved on the U-shaped bending section.
Preferably, the number of the U-shaped bent sections is set to be a plurality at the same height of the reinforcement cage.
Preferably, the flexible steel wire ropes are respectively arranged at different heights of the reinforcement cage.
Preferably, the protective shell is made of foam, sponge or plastic.
Preferably, the detection device is a gauss meter, a hall element or a magnetometer.
The invention also provides an anchor point structure of the foundation pit support, which is characterized by being arranged by adopting the arrangement method.
Compared with the prior art, the anchor point structure of the foundation pit support is arranged by fixedly connecting the flexible steel wire rope with the steel reinforcement cage on the pile body, the U-shaped bent section on the flexible steel wire rope is provided with the magnet, after the steel reinforcement cage is placed down, the position of the magnet is detected through the magnetic detection device, and the U-shaped bent section is exposed after the pile body is excavated to form the anchor point.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a flow chart of a method for setting an anchor point structure of a foundation pit support according to the present invention;
FIG. 2 is a schematic structural view of a reinforcement cage;
FIG. 3 is a schematic view of a structure of a flexible steel cable and a reinforcement cage;
fig. 4 is a schematic view of a matching structure of the flexible steel wire rope and the steel reinforcement cage after the protective shell is installed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a method for setting an anchor point structure of a foundation pit support, including the following steps:
s1: and fixing a flexible steel wire rope on the reinforcement cage, wherein the flexible steel wire rope comprises a U-shaped bending section exposed outside the reinforcement cage, and a magnet is arranged on the U-shaped bending section.
At the same height of the steel reinforcement cage 100, the number of the U-shaped bent sections 310 may be set to be plural, so as to form a plurality of anchor points, which bear the acting force together, and avoid the acting force borne by a single anchor point being too large. The flexible wire rope 300 may be a single flexible wire rope, and a plurality of U-shaped bent segments 310 may be formed by fastening the flexible wire rope in several stages.
Meanwhile, the flexible steel wire ropes 300 can be respectively arranged at different heights of the steel reinforcement cage 100, so as to form anchor points with different heights.
Further, the magnet 500 is a magnetic ring, and the magnetic ring is sleeved on the U-shaped bending section 310, so that a magnet fixing device is not required to be additionally arranged, and the installation is convenient. Before the flexible steel wire rope 300 is installed, a plurality of magnetic rings may be pre-threaded on the flexible steel wire rope 300, then the magnetic rings are sequentially spaced, and then the flexible steel wire rope 300 at the position of the magnetic ring is bent and arched in a direction away from the steel reinforcement cage 100 to form the U-shaped bent section 310.
S2: and coating the U-shaped bent section and the magnet by adopting a protective shell to form a coating body, hoisting the reinforcement cage, aligning the bottom end of the reinforcement cage with the pile hole, bending the coating body upwards, and putting down the reinforcement cage.
The protective case 600 is made of foam, sponge, or plastic, and can be conveniently removed subsequently without shielding the magnetic field of the magnet 500. It should be noted that, in this embodiment, the material of the protective casing 600 is not limited to the above three materials, and the protective casing 600 may be made of any material that does not shield a magnetic field.
Since the diameter of steel reinforcement cage 100 generally matches the diameter of the pile hole, the extended length of U-shaped bent section 310 may affect the lowering of steel reinforcement cage 100 after flexible steel cable 300 is installed. By utilizing the flexibility of the flexible steel wire rope 300, the cladding body is bent upwards, so that the extension length of the U-shaped bent section 310 can be shortened, and the pile hole wall is prevented from being scratched or a protective shell outside the cladding body is prevented from being damaged in the process of lowering the steel reinforcement cage 100. After the steel reinforcement cage 100 is lowered, the cladding body returns under the driving of the elastic potential energy of the U-shaped bending section 310 and is attached to the wall of the pile hole, so that the subsequent detection process can be facilitated.
S3: and grouting into the pile hole, and forming a pile body after solidification.
The grouting operation may be performed by conventional methods in the art, and the embodiment is not limited thereto.
After grouting, the coating body can be correspondingly formed inside the pile body.
S4: and detecting and determining the position of the magnet by adopting a detection device on the outer side of the pile body, wherein the position of the pile body corresponding to the magnet is the position of an anchor point.
The detection device is a gaussmeter, a hall element or a magnetometer, and the corresponding detection principle belongs to the conventional technical means in the field, and the detailed description of the embodiment is omitted. Because the coating body is formed in the pile body, the coating body is difficult to position by utilizing the traditional physical structure, the magnet is positioned by utilizing the detection device, the corresponding physical positioning structure is omitted, the operation is simple, and the coating body is easy to apply in site construction.
S5: and removing the concrete on the pile body at the anchor point position to expose the cladding body, removing the protective shell on the cladding body to expose the U-shaped bent section, wherein the U-shaped bent section correspondingly forms the anchor point.
After the magnet is detected, the position of the U-shaped bent section 310 is determined, at this time, the concrete at the corresponding position on the pile body is removed, and the protective shell 600 is removed to expose the U-shaped bent section 310, and the U-shaped bent section 310 forms an anchor point after being unfolded.
It will be appreciated that the protective casing 600 may function to exclude concrete during grouting. The U-shaped bent section 310 is prevented from being compacted by concrete, and the difficulty of excavation is increased.
After the anchor point formed, can be connected the anchor point on external bearing structure and the excavation supporting, for example bracing, stock etc. can guarantee bearing structure and excavation supporting's stability of being connected on the one hand, and on the other hand the anchor point forms an organic whole structure with the steel reinforcement cage on the pile body, can provide comparatively stable effort, has improved the stability of support system, has increased the reliability of anchor point.
The invention also provides an anchor point structure of the foundation pit support, which is arranged by adopting the arrangement method.
Compared with the prior art, the anchor point structure of the foundation pit support is arranged by fixedly connecting the flexible steel wire rope with the steel reinforcement cage on the pile body, the U-shaped bent section on the flexible steel wire rope is provided with the magnet, after the steel reinforcement cage is placed down, the position of the magnet is detected through the magnetic detection device, and the U-shaped bent section is exposed after the pile body is excavated to form the anchor point.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method for setting an anchor point structure of a foundation pit support is characterized by comprising the following steps:
s1: fixing a flexible steel wire rope on a reinforcement cage, wherein the flexible steel wire rope comprises a U-shaped bent section exposed outside the reinforcement cage, a magnet is arranged on the U-shaped bent section, the reinforcement cage comprises longitudinal reinforcements and stirrups, a plurality of fixed reinforcements are welded on the longitudinal reinforcements, the flexible steel wire rope is fixed on the fixed reinforcements through a connecting piece, the flexible steel wire rope adopts a whole flexible steel wire rope, the flexible steel wire rope is fastened in a sectional manner to form a plurality of U-shaped bent sections, and the U-shaped bent sections are exposed out of gaps between two adjacent longitudinal reinforcements;
s2: covering the U-shaped bent section and the magnet by using a protective shell to form a covering body, hoisting the reinforcement cage to enable the bottom end of the reinforcement cage to be aligned with the pile hole, bending the covering body upwards, and lowering the reinforcement cage;
s3: grouting into the pile hole, and forming a pile body after solidification;
s4: detecting and determining the position of the magnet by adopting a detection device on the outer side of the pile body, wherein the position of the pile body corresponding to the magnet is an anchor point position;
s5: and removing the concrete on the pile body at the anchor point position to expose the cladding body, removing the protective shell on the cladding body to expose the U-shaped bent section, wherein the U-shaped bent section correspondingly forms an anchor point, and after the anchor point is formed, connecting an external support structure with the anchor point.
2. The setting method as recited in claim 1, wherein the connecting member is a U-bolt.
3. The setting method as recited in claim 1, wherein the magnet is a magnetic ring that is sleeved over the U-shaped bend.
4. The method of claim 1, wherein the number of U-shaped bent sections is set to be plural at the same height of the reinforcement cage.
5. A method according to claim 1, wherein the flexible wire ropes are provided at different heights of the reinforcement cage.
6. The deployment method as set forth in claim 1, wherein the protective shell is made of foam, sponge or plastic.
7. The setting method according to claim 1, characterized in that the detection means are gaussmeters, hall elements or magnetometers.
8. An anchor point structure for a foundation pit support, which is arranged by the arrangement method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110196157.6A CN113123344B (en) | 2021-06-08 | 2021-06-08 | Anchor point structure of foundation pit support and setting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110196157.6A CN113123344B (en) | 2021-06-08 | 2021-06-08 | Anchor point structure of foundation pit support and setting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113123344A CN113123344A (en) | 2021-07-16 |
| CN113123344B true CN113123344B (en) | 2022-05-13 |
Family
ID=76772436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110196157.6A Active CN113123344B (en) | 2021-06-08 | 2021-06-08 | Anchor point structure of foundation pit support and setting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113123344B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100572687C (en) * | 2007-05-18 | 2009-12-23 | 北京建工集团有限责任公司 | Prestressed wale dismantling and replacing structure and method |
| CN101838968B (en) * | 2010-05-19 | 2011-06-29 | 中铁二十局集团有限公司 | Double track bridge construction process crossing existing railway operational lines |
| CN105064357B (en) * | 2015-08-10 | 2017-06-13 | 徐传召 | A kind of embedded anchor of prestress anchorage cable and anchoring process |
| CN108625377A (en) * | 2018-06-11 | 2018-10-09 | 云南建投基础工程有限责任公司 | A kind of foundation pit diagonal brace pile construction method and its auxiliary tool |
-
2021
- 2021-06-08 CN CN202110196157.6A patent/CN113123344B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113123344A (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112281896B (en) | Construction pile foundation structure of rotary drilling rig and construction method thereof | |
| KR102555541B1 (en) | Temporary retaining facility using guide bracket and ground anchor for step-by-step support of deep excavation and its construction method | |
| CN113123344B (en) | Anchor point structure of foundation pit support and setting method thereof | |
| CN212358029U (en) | Tunnel type anchorage structure for cable crane | |
| JP5628459B1 (en) | Guard fence support structure | |
| CN106351207A (en) | Construction method for prefabricating underground continuous wall through U-shaped post-tensioning method | |
| CN212129160U (en) | Oblique-pulling foundation pit supporting structure for pile top | |
| JP4780781B2 (en) | Seismic reinforcement method for existing concrete pier | |
| CN111364481A (en) | End embedded type prestressed inclined pile and construction method thereof | |
| CN113605401B (en) | Foundation pit steel structure supporting system and construction method thereof | |
| CN216474962U (en) | Non-embedded type support pile structure | |
| JP5032255B2 (en) | Rockfall protection and avalanche prevention facility | |
| CN105822333B (en) | Mechanical linkage Pulling-Resistant Anchor Rod | |
| CN212428008U (en) | Lower supporting type overhanging scaffold construction device | |
| CN110158498B (en) | Construction method of elastic passive protective net upright post structure | |
| CN111503373A (en) | Underground pipeline protection structure and construction method thereof | |
| JPH10317371A (en) | Method for erecting pile-column in building using pile as column, and pile-column support band for use therein | |
| CN210946537U (en) | Elastic passive protective net upright post structure | |
| KR200235100Y1 (en) | A Reinforced Structure of Steel Cage for Inserting in Concrete Pile | |
| CN111809521A (en) | Tunnel type anchorage structure for cable crane and construction method thereof | |
| CN113089654A (en) | Construction process of hole digging pile in complex soil layer and steel casing for construction | |
| CN111188631A (en) | Double-primary-support entering-hole structure of ingate and construction method thereof | |
| CN110593314B (en) | Pipe well suspension protection structure and masonry pipe well in-situ protection construction method | |
| CN219773794U (en) | Prefabricated wire pole base for 5G base station | |
| KR102517411B1 (en) | Prestressed soldier piles for displacement control and it's application to construction method for self-supporting temporary earth retaining walls |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |