阅读说明：本技术 一种可回收前撑注浆钢管的固定套管 (Fixing sleeve capable of recycling front support grouting steel pipe ) 是由 钟满群 尚宁洲 于 2021-07-16 设计创作，主要内容包括：一种可回收前撑注浆钢管的固定套管,包括套管本体,其特征在于：所述固定套管本体为一段材质为DN400钢管,钢管的长度尺寸根据实际工程地下室底板或地下室外墙而定,使钢管在待基坑开挖后放置于地下室底板或地下室外墙处；固定套管需套进前撑注浆钢管的外侧,固定套管四周焊接止水片。本发明的可回收前撑注浆钢管的固定套管具有固定套管结构简单、制作方便,提高基坑围护施工效率,有效保证施工安全,且方便灵活运用到复杂环境下的基坑围护中,固定套管操作方便、可回收和降低工程成本的优点。(The utility model provides a fixed sleeve of recoverable preceding slip casting steel pipe that props, includes the sleeve pipe body, its characterized in that: the fixed sleeve body is a section of steel pipe made of DN400, the length and the size of the steel pipe are determined according to the bottom plate or the outer wall of the basement of the actual engineering, so that the steel pipe is placed at the bottom plate or the outer wall of the basement after the foundation pit is excavated; the fixed sleeve needs to be sleeved on the outer side of the front support grouting steel pipe, and water stop sheets are welded on the periphery of the fixed sleeve. The fixing sleeve capable of recycling the front support grouting steel pipe has the advantages that the fixing sleeve is simple in structure and convenient to manufacture, the construction efficiency of foundation pit enclosure is improved, the construction safety is effectively guaranteed, the fixing sleeve can be conveniently and flexibly applied to foundation pit enclosure in a complex environment, the fixing sleeve is convenient to operate and can be recycled, and the engineering cost is reduced.)

1. The utility model provides a fixed sleeve of recoverable preceding slip casting steel pipe that props, includes the sleeve pipe body, its characterized in that:

the fixed sleeve body is a section of steel pipe made of DN400, the length and the size of the steel pipe are determined according to the bottom plate or the outer wall of the basement of the actual engineering, so that the steel pipe is placed at the bottom plate or the outer wall of the basement after the foundation pit is excavated; the fixed sleeve needs to be sleeved on the outer side of the front support grouting steel pipe, and water stop sheets are welded on the periphery of the fixed sleeve.

2. The fixing sleeve of the recoverable front prop grouting steel pipe according to claim 1, wherein the lowest part of the fixing sleeve is not 20mm lower than the concrete pouring surface.

Technical Field

The invention relates to a sleeve, in particular to a fixed sleeve capable of recovering a front support grouting steel pipe.

Background

Chinese patent CN208748662U discloses a foundation pit front-supported grouting steel pipe supporting structure in 2019, 4/16, which includes a foundation pit enclosure, the top of the back of the foundation pit enclosure is fixedly connected with the front of the capping beam, one side of the foundation pit enclosure is fixedly connected with one side of the concrete force transmission belt, and one side of the foundation pit enclosure is fixedly connected with one side of the reinforcement cushion layer, the bottom of the concrete force transmission belt is fixedly connected with one side of the top of the reinforcement cushion layer, and the other side of the concrete force transmission belt is fixedly provided with a backing plate. Although the technical scheme solves the problems that an original support system is complex and causes dust pollution to the environment when the support is detached, the defects that a front support grouting steel pipe needs to be cut off, the environment is polluted when the front support grouting steel pipe is cut off, manpower is wasted and the like exist, the difficulty in cutting off the steel pipe is high, materials and labor cost are wasted, great influence is caused on the field construction period, and the problem that the steel pipe cannot be recycled is solved, so that the measure cost is high.

Therefore, the known construction method of the front support grouting steel pipe has various inconveniences and problems.

Disclosure of Invention

The invention aims to provide a safe and reliable fixing sleeve capable of recovering a front support grouting steel pipe.

In order to achieve the purpose, the technical solution of the invention is as follows:

the utility model provides a fixed sleeve of recoverable preceding slip casting steel pipe that props, includes the sleeve pipe body, its characterized in that:

the fixed sleeve body is a section of steel pipe made of DN400, the length and the size of the steel pipe are determined according to the bottom plate or the outer wall of the basement of the actual engineering, so that the steel pipe is placed at the bottom plate or the outer wall of the basement after the foundation pit is excavated; the fixed sleeve needs to be sleeved on the outer side of the front-support grouting steel pipe, and water stop sheets are welded on the periphery of the fixed sleeve.

The fixing sleeve of the recyclable front support grouting steel pipe can be further realized by adopting the following technical measures.

The fixing sleeve capable of recovering the front-support grouting steel pipe is characterized in that the lowest position of the fixing sleeve is not 20mm lower than a concrete pouring surface.

After the technical scheme is adopted, the fixing sleeve capable of recovering the front support grouting steel pipe has the following advantages:

1. the fixed sleeve has simple structure and convenient manufacture;

2. the construction efficiency of foundation pit enclosure is improved, the construction safety is effectively guaranteed, and the foundation pit enclosure is convenient and flexible to use in the foundation pit enclosure under the complex environment;

3. the fixed sleeve is convenient to operate and recyclable, and engineering cost is reduced.

Drawings

FIG. 1 is a schematic view of a state of use of a retaining sleeve of a recyclable front-prop grouting steel pipe according to an embodiment of the present invention;

fig. 2 is a plan view of a locking bushing according to an embodiment of the present invention.

In the figure: the method comprises the following steps of 1 ground, 2 cement mixing piles, 3 cast-in-place piles, 4 cast to an enclosing edge, 5 crown beams, 6 sleeves, 7 water stop steel plates, 8 structural outer walls, 9 cushion layers, 10 front support grouting steel pipes, 11 welding seams and 12 secondary casting of micro-expansion fine stone concrete with the same strength.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

Example 1

The invention discloses a fixing sleeve capable of recovering a front support grouting steel pipe.

Referring to fig. 1, fig. 1 is a schematic view illustrating a use state of a fixing sleeve of a recyclable front-support grouting steel pipe according to an embodiment of the present invention. As shown in the figure, the fixed sleeve body is a section of steel pipe made of DN400, the length and the size of the steel pipe are determined according to the bottom plate or the outer wall of the basement of the actual engineering, so that the steel pipe is placed at the bottom plate or the outer wall of the basement after the foundation pit is excavated; the fixed sleeve needs to be sleeved on the outer side of the front support grouting steel pipe, and water stop sheets are welded on the periphery of the fixed sleeve. The lowest part of the fixing sleeve is not 20mm lower than the concrete pouring surface.

The setting structure of the fixing sleeve of the recyclable front support grouting steel pipe comprises the following steps: crown beam 5 is less than ground 1, and one side of crown beam is cement mixing pile 2, hugs closely the cement mixing pile and is equipped with bored concrete pile 3, and the crown beam is in the bored concrete pile top, and sleeve pipe 6 sets up in bed course 9, and 4 of bed course are pour to enclosing the safe edge, and fore-stock slip casting steel pipe 10 is worn to establish at sleeve pipe 6, and the sleeve pipe is equipped with stagnant water steel sheet 7, and stagnant water steel sheet is thick 3mm, and the welding requirement of weld joint 11 is weld height more than or equal to 6 mm. As an alternative, the sleeve 6 may also be provided in the structural exterior wall 8. Fig. 2 is a plan view of a locking bushing according to an embodiment of the present invention.

Example 2

The invention discloses a using method of a fixing sleeve capable of recovering a front support grouting steel pipe, which comprises the following steps:

the fixed sleeve capable of recycling the front support grouting steel pipe adopts a DN400 steel sleeve, and the size is discharged according to the bottom plate and the outer wall of the basement of the actual engineering. Before the construction of a grouting steel pipe, the fixing sleeve is sleeved on the outer side of the grouting steel pipe, the fixing sleeve is placed at the bottom plate and the outer wall after a foundation pit is excavated, water stop sheets are welded on the periphery of the fixing sleeve, the lowest position of the fixing sleeve is not lower than the concrete surface by 20mm, the fixing sleeve is welded and fixed with peripheral steel bars, the angle is guaranteed to be straight, and the fixing sleeve is forbidden to be blocked when concrete is poured. And when the grouting steel pipe is dismantled in the later stage, cutting off the sleeve pipe higher than the concrete surface, filling the sleeve pipe with the same-strength micro-expansion P6 fine-stone concrete, and pouring the same-strength micro-expansion fine-stone concrete 12 for the second time, wherein the maintenance period is not less than 14 days.

Compared with the traditional construction of the front support grouting steel pipe, the fixing sleeve of the recyclable front support grouting steel pipe has the characteristics of convenience in installation, strong practicability, recoverability, cost saving and the like.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.