阅读说明：本技术 一种分层膨胀顶升装置及其施工方法 (Layered expansion jacking device and construction method thereof ) 是由 吉德三 周茂辉 于 2020-08-11 设计创作，主要内容包括：本发明提供一种分层膨胀顶升装置及其施工方法,装置包括放置在钢套内的若干分层隔,分层隔在钢套内自下而上依次叠加,分层隔底部设置有反推环,分层隔内灌注有水和膨胀剂的混合料。施工时首先将符合质量配比要求的水和膨胀剂充分搅拌,将得到的糊状膨胀剂灌注若干分层隔中；然后将钢套放置在固定于顶升点的油缸上方,与油缸缸体连接固定,将若干分层隔依次叠加放置到钢套中,油缸活塞伸出部分顶端与钢套内底层分层隔底面接触,进行膨胀顶升。本发明改变了膨胀剂在钢套内的受力和膨胀方向,使得钢套内膨胀剂尽可能沿轴向流动、膨胀,克服由膨胀剂膨胀自锁带来的膨胀率降低,膨胀率和内应力分布不均衡等问题。(The invention provides a layered expansion jacking device and a construction method thereof. During construction, firstly, fully stirring water and an expanding agent which meet the quality ratio requirement, and filling the obtained pasty expanding agent into a plurality of layering partitions; then the steel jacket is placed above the oil cylinder fixed at the jacking point, the oil cylinder is fixedly connected with the cylinder body of the oil cylinder, a plurality of layered partitions are sequentially stacked and placed in the steel jacket, and the top end of the extending part of the piston of the oil cylinder is contacted with the bottom surface of the bottom layer of the steel jacket in a layered partition mode to perform expansion jacking. The invention changes the stress and expansion direction of the expanding agent in the steel sleeve, so that the expanding agent in the steel sleeve can flow and expand along the axial direction as far as possible, and solves the problems of expansion rate reduction, unbalanced distribution of expansion rate and internal stress and the like caused by expansion self-locking of the expanding agent.)

1. The utility model provides a layering inflation jacking device which characterized in that: the expansion agent comprises a plurality of layering partitions placed in a steel sleeve, the layering partitions are sequentially stacked in the steel sleeve from bottom to top, a reverse push ring is arranged at the bottom of each layering partition, and a mixture of water and an expansion agent is filled in each layering partition.

2. The layered expansion jacking device as claimed in claim 1, wherein: the reverse thrust ring is a 45-degree chamfer structure arranged at the edge of the bottom of the layered partition, and an isosceles right triangle is formed between the section of the reverse thrust ring and the layered partition surface.

3. The layered expansion jacking device as claimed in claim 1, wherein: the layering partition, the steel sleeve and the reverse thrust ring are all made of steel.

4. The layered expansion jacking device as claimed in claim 1, wherein: the steel jacket is of a cylindrical barrel structure, the upper portion and the lower portion of the steel jacket are provided with openings, the layering partition is of a flat cylindrical barrel structure, the lower portion of the layering partition is provided with a bottom, and the upper portion of the layering partition is provided with an opening.

5. The layered expansion jacking device as claimed in claim 1, wherein: the outer diameter of the layering partition is the same as the inner diameter of the steel sleeve, the height of the plurality of layering partitions after being stacked is the same as the inner height of the steel sleeve, and the outer diameter of the reverse thrust ring is the same as the inner diameter of the layering partition in size.

6. The layered expansion jacking device as claimed in claim 1, wherein: the expanding agent is static blasting expanding agent.

7. The layered expansion jacking device as claimed in claim 1, wherein: lubricating oil is smeared between the steel sleeve and the layering partition and between the reverse thrust ring and the layering partition.

8. The construction method of the layered expansion jacking device as claimed in any one of claims 1 to 7, which comprises the following steps:

fully stirring water and an expanding agent which meet the quality proportion requirement, and filling the obtained pasty expanding agent into a plurality of layered compartments;

and step two, placing the steel sleeve above the oil cylinder fixed at the jacking point, connecting and fixing the steel sleeve with the cylinder body of the oil cylinder, sequentially superposing a plurality of layered partitions into the steel sleeve, and contacting the top end of the extending part of the piston of the oil cylinder with the layered partition bottom surface of the bottom layer in the steel sleeve to perform expansion jacking.

9. The construction method of the layered expansion jacking device as claimed in claim 8, wherein: fully stirring water and an expanding agent which meet the mass ratio requirement in the first step, wherein the mass ratio is water: bulking agent = 1: 3 or 1: 2.7.

Technical Field

The invention belongs to the technical field of expansion jacking, and particularly relates to a layered expansion jacking device and a construction method thereof.

Background

In traditional inflation jacking technique, the powder material that will have the expansibility is usually placed in a big barrel, utilizes the self-expanding performance of material, realizes the jacking purpose, but the powder material inflation auto-lock that has the self-expanding performance under the pressure-bearing state leads to the container wall to close on regional powder material to harden, and the internal stress distortion is high and the expansion rate is on the low side, has influenced the effect of inflation jacking greatly. Therefore, the invention aims to provide a layered expansion technology, and aims to effectively reduce the phenomena of reduction of effective expansion rate and serious imbalance of expansion rate and internal stress distribution caused by self-locking expansion of powder and granular materials with self-expansion performance in a pressure-bearing state.

Disclosure of Invention

Aiming at the problems in the prior art, the technical scheme adopted by the invention for solving the problems in the prior art is as follows:

the utility model provides a layering inflation jacking device which characterized in that: the expansion agent comprises a plurality of layering partitions placed in a steel sleeve, the layering partitions are sequentially stacked in the steel sleeve from bottom to top, a reverse push ring is arranged at the bottom of each layering partition, and a mixture of water and an expansion agent is filled in each layering partition.

The reverse thrust ring is a 45-degree chamfer structure arranged at the edge of the bottom of the layered partition, and an isosceles right triangle is formed between the section of the reverse thrust ring and the layered partition surface.

The layering partition, the steel sleeve and the reverse thrust ring are all made of steel.

The steel jacket is of a cylindrical barrel structure, openings are formed in the upper portion and the lower portion of the steel jacket, the layering partition is of a flat cylindrical barrel structure, a bottom is arranged below the layering partition, and an opening is formed in the upper portion of the layering partition.

The outer diameter of the layering partition is the same as the inner diameter of the steel sleeve, the height of the plurality of layering partitions after being stacked is the same as the inner height of the steel sleeve, and the outer diameter of the reverse thrust ring is the same as the inner diameter of the layering partition in size.

The expanding agent is used as the static blasting expanding agent, and is required to have higher expansion rate and higher ultimate stress, the ultimate stress of the first generation of the static blasting expanding agent in the prior art is about 30MPa, the ultimate stress of the second generation is about 50MPa, and the latest ultimate stress exceeds 100 MPa.

Lubricating oil is smeared between the steel sleeve and the layering partition and between the reverse thrust ring and the layering partition, so that the expansion resistance is further reduced.

A construction method of a layered expansion jacking device specifically comprises the following steps:

fully stirring water and an expanding agent which meet the quality proportion requirement, and filling the obtained pasty expanding agent into a plurality of layered compartments;

and step two, placing the steel sleeve above the oil cylinder fixed at the jacking point, connecting and fixing the steel sleeve with the cylinder body of the oil cylinder, sequentially superposing a plurality of layered partitions into the steel sleeve, and contacting the top end of the extending part of the piston of the oil cylinder with the layered partition bottom surface of the bottom layer in the steel sleeve to perform expansion jacking.

Fully stirring water and an expanding agent which meet the mass ratio requirement in the first step, wherein the mass ratio is water: bulking agent = 1: 3 or 1: 2.7.

the invention has the following action principle: the paste-like swelling agent undergoes a hydration reaction in the delamination to cause volume expansion. Since the height-direction dimension h1 is smaller than the radial dimension d1, the internal friction effect in the height direction is weak when the expanding agent expands. In addition, the expansion agent is constrained by the approximate rigidity of the bottom of the layered partition and the surrounding vessel wall, in addition to the top being constrained by friction at the top layered partition or the contact surface of the jacking object causing the expansion agent to flow radially restricted. Under the inducing and limiting action of the layered partition, the expanding agent flows and expands upwards mainly along the direction parallel to the axis of the layered partition. The thrust ring converts the radial expansion force part of the horizontal layer into axial thrust (the horizontal solid line shown in figure 3 represents the radial expansion force of the horizontal layer of the thrust ring), and the axial flow tendency of the expanding agent in the area adjacent to the container wall is enhanced (the vertical dotted line shown in figure 3 represents the axial flow tendency of the expanding agent in the area adjacent to the container wall), so that the purpose of weakening the expansion self-locking of the expanding agent in the area adjacent to the container wall is achieved.

For controlling the expansion direction of the expanding agent, in the existing expansion jacking technology, besides hardening, uneven stress distribution and low effective expansion rate caused by internal friction self-locking, the expansion agent overflowing the steel sleeve cannot control the expansion direction to cause the collapse and jacking failure of the expanding agent. The invention adopts the layered separation and layered expansion, the position of each layered separation is changed in the expansion process, the total thickness of the expanding agent overflowing the steel sleeve is equal to the sum of the thicknesses of the expanding agents overflowing the layered separations, so the expanding agent overflowing the steel sleeve is still limited by the overflowing layered separation, and the radial expansion is limited by the friction force on the contact surface of the jacking object, thereby ensuring the expansion direction of the expanding agent overflowing the steel sleeve.

The invention has the following advantages:

according to the invention, the pasty expanding agent is layered in the steel sleeve by using the layering partition, and the reverse push ring is arranged at the bottom of the layering partition, so that the stress and expansion direction of the expanding agent in the steel sleeve are changed, the expanding agent in the steel sleeve can flow and expand in the axial direction as much as possible, the purpose of weakening expansion self-locking of the expanding agent in the area close to the wall of the container is achieved, and the problems of reduction of expansion rate, unbalanced distribution of expansion rate and internal stress and the like caused by expansion self-locking of the expanding agent are solved.

Drawings

FIG. 1 is a schematic view of a layered structure of the apparatus of the present invention;

FIG. 2 is a schematic view of a structure of a thrust reverser ring arranged in a layer partition of the device of the present invention;

FIG. 3 is a schematic diagram of the reaction principle of the thrust reverser ring.

Wherein: 1-layered separation and 2-reverse push ring.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings, as shown in fig. 1, the layered expansion jacking device comprises a plurality of layered partitions placed in a steel sleeve, the layered partitions are sequentially stacked in the steel sleeve from bottom to top, the bottoms of the layered partitions are provided with reverse push rings, and the layered partitions are filled with a mixture of water and an expanding agent.

As shown in fig. 2, the reverse thrust ring is a 45-degree chamfer structure arranged at the edge of the bottom of the layered partition, and an isosceles right triangle is formed between the section of the reverse thrust ring and the layered partition surface.

The layering partition, the steel sleeve and the reverse thrust ring are all made of steel.

The steel jacket is a cylindrical barrel structure, the upper part and the lower part of the steel jacket are both provided with openings, the layering partition is a flat cylindrical barrel structure, the lower part of the layering partition is provided with a bottom, and the upper part of the layering partition is provided with an opening.

The outer diameter of the layering partition is the same as the inner diameter of the steel sleeve, the height of the plurality of layering partitions after being stacked is the same as the inner height of the steel sleeve, and the outer diameter of the thrust ring is the same as the inner diameter of the layering partition in size.

The expanding agent for static blasting is used as the expanding agent, and is required to have higher expansion force and higher ultimate stress, the ultimate stress of the first generation of the expanding agent for static blasting in the prior art is about 30MPa, the ultimate stress of the second generation is about 50MPa, and the latest ultimate stress exceeds 100 MPa.

Lubricating oil is smeared between the steel sleeve and the layering partition and between the reverse thrust ring and the layering partition, so that the expansion resistance is further reduced.

A construction method of a layered expansion jacking device specifically comprises the following steps:

fully stirring water and an expanding agent which meet the quality proportion requirement, and filling the obtained pasty expanding agent into a plurality of layered compartments;

and step two, placing the steel sleeve above the oil cylinder fixed at the jacking point, connecting and fixing the steel sleeve with the cylinder body of the oil cylinder, sequentially superposing a plurality of layered partitions into the steel sleeve, and contacting the top end of the extending part of the piston of the oil cylinder with the layered partition bottom surface of the bottom layer in the steel sleeve to perform expansion jacking.

Fully stirring water and an expanding agent which meet the mass ratio requirement in the first step, wherein the mass ratio is water: bulking agent = 1: 3 or 1: 2.7.

the invention has the following action principle: the paste-like swelling agent undergoes a hydration reaction in the delamination to cause volume expansion. Since the height-direction dimension h1 is smaller than the radial dimension d1, the internal friction effect in the height direction is weak when the expanding agent expands. In addition, the expansion agent is constrained by the approximate rigidity of the bottom of the layered partition and the surrounding vessel wall, in addition to the top being constrained by friction at the top layered partition or the contact surface of the jacking object causing the expansion agent to flow radially restricted. Under the inducing and limiting action of the layered partition, the expanding agent flows and expands upwards mainly along the direction parallel to the axis of the layered partition. The thrust ring converts the radial expansion force part of the horizontal layer into axial thrust (the horizontal solid line shown in figure 3 represents the radial expansion force of the horizontal layer of the thrust ring), and the axial flow tendency of the expanding agent in the area adjacent to the container wall is enhanced (the vertical dotted line shown in figure 3 represents the axial flow tendency of the expanding agent in the area adjacent to the container wall), so that the purpose of weakening the expansion self-locking of the expanding agent in the area adjacent to the container wall is achieved.

For controlling the expansion direction of the expanding agent, in the existing expansion jacking technology, besides hardening, uneven stress distribution and low effective expansion rate caused by internal friction self-locking, the expansion agent overflowing the steel sleeve cannot control the expansion direction to cause the collapse and jacking failure of the expanding agent. The invention adopts the layered separation and layered expansion, the position of each layered separation is changed in the expansion process, the total thickness of the expanding agent overflowing the steel sleeve is equal to the sum of the thicknesses of the expanding agents overflowing the layered separations, so the expanding agent overflowing the steel sleeve is still limited by the overflowing layered separation, and the radial expansion is limited by the friction force on the contact surface of the jacking object, thereby ensuring the expansion direction of the expanding agent overflowing the steel sleeve.

The protective scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.